CN110075557A - A kind of multistage suitching type feed liquid method of evaporating and device - Google Patents
A kind of multistage suitching type feed liquid method of evaporating and device Download PDFInfo
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- CN110075557A CN110075557A CN201910479693.XA CN201910479693A CN110075557A CN 110075557 A CN110075557 A CN 110075557A CN 201910479693 A CN201910479693 A CN 201910479693A CN 110075557 A CN110075557 A CN 110075557A
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- 239000007788 liquid Substances 0.000 title claims abstract description 139
- 238000001704 evaporation Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title abstract description 6
- 230000008020 evaporation Effects 0.000 claims abstract description 75
- 238000010438 heat treatment Methods 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000011084 recovery Methods 0.000 claims description 48
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 239000000498 cooling water Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 8
- 239000003814 drug Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000009834 vaporization Methods 0.000 abstract 2
- 230000008016 vaporization Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009194 climbing Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0094—Evaporating with forced circulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/16—Evaporating by spraying
- B01D1/20—Sprayers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0036—Multiple-effect condensation; Fractional condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0057—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes
- B01D5/006—Condensation of vapours; Recovering volatile solvents by condensation in combination with other processes with evaporation or distillation
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention discloses a kind of multistage suitching type feed liquid method of evaporating and device and respectively sets a component or more two-step heating device in vaporization chamber two sides, every level-one heating device of two sides passes through straight tube connection including the vaporising device that multistage mutually switches；Multi-stage heating fills 100% work status of device, as reduction of feed volume gradually decreases, feed liquid can not be back to vaporization chamber from heater, can be according to feed liquid circulation amount, close level-one or multiple stage heater, it is further reduced with feed liquid, until surplus afterbody heater circulation is closed, when ability to work is the minimum heating evaporation amount of complete machine, remaining a small amount of feed liquid can be completely processed, ideal treatment effect is obtained, to prevent the waste of feed liquid, is improved work efficiency.
Description
Technical Field
The invention discloses a multistage switching type feed liquid evaporation method and device, particularly relates to a feed liquid concentration device and a feed liquid evaporator thereof, and belongs to the technical field of liquid medicine concentration.
Background
In the technical fields of pharmacy, chemical industry and the like, in order to realize the purification and concentration of effective substances, a feed liquid concentration device is generally adopted for concentration and purification treatment. The liquid medicine concentrating device generally adopts a heater to heat low-concentration liquid medicine, a foam mixture is generated in the heater by utilizing a climbing film technology and is conveyed to an evaporation chamber through a pipeline, and the liquid medicine is rapidly evaporated under the negative pressure condition.
In the existing production equipment, pipelines of a heater and an evaporation chamber are short straight pipelines, and a foam mixture generated by a rising film directly enters an evaporator, rapidly falls down under the action of gravity and is deposited at the bottom of the evaporation chamber. Like this, the feed liquid does not have sufficient surface area and evaporates in the negative pressure environment, and the evaporating chamber is mostly straight cylindric, can't effectual increase evaporation area, has reduced evaporation efficiency. Each level of the feed liquid evaporator is only provided with one heater, so that a small amount of feed liquid is difficult to concentrate, and the waste caused by the failure of treatment of the residual feed liquid is caused.
Disclosure of Invention
The invention provides a multistage switching type feed liquid evaporation method and device, which improve the concentration efficiency of the existing feed liquid concentration device, can realize the grading concentration work of feed liquid, and can meet the concentration requirement of the feed liquid by one-time concentration.
The invention provides a multistage switching type feed liquid evaporation method, which comprises multistage mutually-switched evaporation devices, wherein a group of upper and lower two-stage heating devices are respectively arranged on two sides of an evaporation chamber, and each stage of heating device on the two sides is connected through a straight pipe; the multistage heating device works in a 100% state, the feed liquid cannot flow back to the evaporation chamber from the heater along with the gradual reduction of the feed liquid amount, the one-stage or multistage heater can be closed according to the feed liquid circulation amount, the feed liquid is further reduced along with the feed liquid until the last-stage heater circulation is closed, and when the working capacity is the minimum heating evaporation amount of the whole machine, a small amount of residual feed liquid can be completely treated, so that an ideal treatment effect is obtained, and the waste of the feed liquid is prevented.
The invention discloses a multistage switching type feed liquid evaporation method, which adopts the technical scheme that the method comprises the following steps:
1) the feed liquid inlet sucks feed liquid into the evaporation chamber through negative pressure, the feed liquid is conveyed to the first-fourth-stage heaters through the circulating pump for circular heating, the third-stage heaters, the fourth-stage heaters and the circulating pump thereof are closed step by step along with the continuous reduction of the feed liquid, and the heating circulation is stopped; the circulating pump promotes the further heating cycle evaporation of feed liquid through first order heater, second level heater, along with the continuous reduction of feed liquid, heats to last one-level heating installation: when the volume of the feed liquid is smaller than the sum of the heating spaces of the first-stage heater and the second-stage heater, the second-stage heater heats the feed liquid, and the rest feed liquid is concentrated to realize the switching work function of the heaters;
2) when the feed liquid circulates among the heating device, the feeding loop, the evaporation chamber and the discharging loop, the tail end of the feeding loop is provided with the annular flow dividing device for distributing the liquid medicine, and the feed liquid is sprayed to the inner wall of the evaporation chamber, so that the evaporation area is increased, and the working efficiency is improved;
3) in a secondary condenser; the first recovery tank collects the condensed water passing through the first condenser and the second condenser and discharges the condensed water from a water outlet; conveying the gas which is not condensed by the first condenser to a second condenser through a second steam pipeline; the second liquid collecting tank collects the condensed water discharged by the last stage heating device and transmits the condensed water to the first recovery tank, and the condensed water is connected with a discharge outlet through a water outlet;
the multistage switching feed liquid evaporator suitable for the evaporation method mainly comprises a heating device, an evaporation chamber, a circulating pump, a secondary condenser, a first recovery tank, a second recovery tank, a vacuum pump and corresponding pipelines; wherein,
the heating device consists of a first-stage heater, a second-stage heater, a third-stage heater and a fourth-stage heater; the first heater is connected with the second heater in series and is a first group of heater, the third heater is connected with the fourth heater in series and is a second group of heater, and the two groups of heaters are connected in parallel and then are respectively connected with the feeding loop and the discharging loop of the evaporation chamber through the circulating pump:
the secondary condenser is as follows: comprises a first condenser, a first-stage circulating water inlet and a first-stage circulating water outlet; the second condenser, a second-stage cooling water inlet and a second-stage cooling water outlet; a first recovery tank and a second recovery tank;
a steam outlet of the evaporation chamber is connected with a first-stage condenser and a second condenser in series, and the first-stage condenser and the second condenser are respectively connected with a first recovery tank; the first recovery tank and the second recovery tank are connected in series and then connected with condensate outlets of the first-stage heater and the fourth-stage heater;
the first-stage condenser is connected with the first-stage recovery tank through a first condensation water pipeline;
the second-stage condenser is connected with the first-stage recovery tank through a second steam pipeline and a third condensate pipeline; the second water condensation pipeline is connected with the third water condensation pipeline in parallel;
the water outlet of the first recovery tank is connected with a discharge outlet;
the evaporation chamber is of a sealed tank structure, the side wall of the lower part of the evaporation chamber is in an oblique cone shape, and the angle between the oblique cone and the vertical direction is 5-15 degrees; an annular flow dividing device is arranged at the upper part in the evaporation chamber and is of a hollow circular structure; a plurality of small spray holes are uniformly distributed on the periphery of the circular ring to form an annular spray pipe, the center of the circular ring is communicated with a cross pipeline, and the center of the pipeline is connected with a feeding loop at the top of the evaporation chamber; the bottom of the evaporation chamber is connected with a discharge loop, and a negative pressure environment lower than the atmospheric pressure is formed in the evaporation chamber under the negative pressure action of a vacuum pump on a steam outlet of the evaporation chamber;
in the invention, the evaporation chamber of the previous stage of the feed liquid evaporator is communicated with the heating input pipelines of the heaters of the next stage of the feed liquid evaporator; each level of feed liquid enrichment facility feed liquid evaporimeter has two sets of level four heaters, every two-level heater passes through the straight tube and connects, the two-level heater that distributes in the evaporating chamber both sides is established ties and is a set of, each level of evaporimeter sets up two sets of heaters, two sets of level four heaters are full load work simultaneously when handling a large amount of feed liquids, along with the feed liquid in the circulation evaporation in-process hydroecium and feed liquid separation, the feed liquid constantly reduces, close the heater step by step and make a small amount of feed liquid in the surplus reach the most ideal treatment effect, every group heater configuration helping hand circulating device, two sets of heater circulation feed.
The invention has the advantages that:
the heater with the multi-stage mutual switching is adopted, when a large amount of feed liquid is processed, the four-stage or multi-stage heater works at full load, the heater is turned off step by step along with the continuous reduction of the feed liquid amount until the last stage of heater is turned off, and the rest feed liquid can be completely processed; the annular flow dividing device is combined with the inclined cone type evaporation chamber, and the feed liquid is uniformly sprayed and dispersed to the periphery of the inner wall of the evaporation chamber through the flow dividing device, so that the feed liquid flows downwards along the inner wall of the inclined cone type evaporation chamber in a falling film mode, large-area evaporation is formed, and the working efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a multi-stage switching feed liquid evaporator according to the present invention;
FIG. 2 is a schematic diagram of the structure of the evaporation chamber of the present invention;
FIG. 3 is a cross-sectional view taken along the plane A-A of the evaporation chamber of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific examples.
Example 1
The concentration process is gradually reduced from the 100% working state of the heating device to the 25% working state; along with the separation of water molecules from the feed liquid in the rising film concentration process of the feed liquid, the feed liquid is continuously reduced, and the heaters 1.3 and 1.4 and the circulating pump 5.2 are closed step by step; and the working state reaches 50%, the volume of the feed liquid is further reduced along with the feed liquid (the volume of the feed liquid is less than the sum of heating spaces of the heaters 1.1 and 1.2), the last stage of heater works at 1.2, and the concentration of the residual feed liquid is finished.
Fig. 1 is a schematic view of a feed liquid concentration device of the present invention, which mainly comprises a heating device 1, an evaporation chamber 2, a circulating pump 5, two first-stage condensers 6.1 and second condensers 6.2 connected in series, two recovery tanks 7.1 and 7.2, a vacuum pump 16 and corresponding pipelines; wherein,
heating device 1 constitute by first order heater 1.1, second level heater 1.2, third level heater 1.3, fourth level heater 1.4, first order heater 1.1 establishes ties with second level heater 1.2 and is the first group, third level heater 1.3 establishes ties with fourth level heater 1.4 and is the second group, two sets of heaters are connected in parallel the back respectively through circulating pump 5 and evaporating chamber 2's feeding return circuit 3 and ejection of compact return circuit 4 and are connected:
a steam outlet 13 of the evaporation chamber 2 is connected with a first-stage condenser 6.1 and a second condenser 6.2 in series, and the first condenser 6.1 and the second condenser 6.2 are respectively connected with a first recovery tank 7.1; the first recovery tank 7.1 and the second recovery tank 7.2 are connected in series and then connected with condensate outlets 9 of the first-stage heater 1.1 to the fourth-stage heater 1.4;
the first condenser 6.1 is connected with the first recovery tank 7.1 through a first condensation water pipeline 14;
the second condenser 6.2 is connected with the first recovery tank 7.1 through a second steam pipeline 18 and a third condensate pipeline 19; the second water condensation pipeline 18 and the third water condensation pipeline 19 are connected in parallel;
the water outlet of the first recovery tank 7.1 is connected with a discharge outlet;
referring to fig. 2 and 3, the evaporation chamber 2 is of a sealed tank structure, the side wall of the lower part of the evaporation chamber is in an oblique cone shape, and the angle between the oblique cone and the vertical direction is 5-15 degrees; an annular flow dividing device 3.1 is arranged at the upper part in the evaporation chamber 2, and the annular flow dividing device 3.1 is of a hollow circular structure; a plurality of small spray holes are uniformly distributed on the periphery of the circular ring to form an annular spray pipe, the center of the circular ring is communicated with a cross pipeline, and the center of the pipeline is connected with a feeding loop 3 at the top of the evaporation chamber 2; the bottom of the evaporation chamber 2 is connected with a discharge loop 4, and a negative pressure environment with the pressure lower than the atmospheric pressure is formed in the evaporation chamber 2 under the negative pressure action of a vacuum pump 16 on a steam outlet 13;
the secondary condenser comprises a first condenser 6.1, a first-stage circulating water inlet 10.1 and a first-stage circulating water outlet 10.2; a second cooler 6.2, a second stage cooling water inlet 11.1 and a second stage cooling water outlet 11.2.
The evaporation method comprises the following steps:
1) the raw material liquid inlet 12 sucks the raw material liquid into the evaporation chamber 2 by negative pressure, the raw material liquid is conveyed to the first-stage heater 1.1, the second-stage heater 1.2, the third-stage heater 1.3 and the fourth-stage heater 1.4 by the circulating pump 5.1 and the circulating pump 5.2 for circulating heating, the third-stage heater 1.3, the fourth-stage heater 1.4 and the circulating pump 5.2 are closed step by step along with the continuous reduction of the raw material liquid, and the third-stage heater 1.3 and the fourth-stage heater 1.4 stop heating circulation; circulating pump 5.1 promotes the further heating cycle evaporation of feed liquid through first order heater 1.1, second level heater 1.2, along with the continuous reduction of feed liquid, heats to last one-level heating installation ware 1.2: when the volume of the feed liquid is smaller than the sum of the heating spaces of the first-stage heater 1.1 and the second-stage heater 1.2, the second-stage heater 1.2 heats the feed liquid, and the rest feed liquid is concentrated to realize the switching work function of the heaters;
2) when the feed liquid circulates among the heating device 1, the feeding loop 3, the evaporation chamber 2 and the discharging loop 4, the tail end of the feeding loop 3 is provided with the annular flow dividing device 3.1 for distributing the liquid medicine, and the feed liquid is sprayed to the inner wall of the evaporation chamber, so that the evaporation area is increased, and the working efficiency is improved;
3) the secondary condenser comprises a first condenser 6.1, a first-stage circulating water inlet 10.1 and a first-stage circulating water outlet 10.2; a second cooler 6.2, a second-stage cooling water inlet 11.1 and a second-stage cooling water outlet 11.2; a first recovery tank 7.1 and a second recovery tank 7.2. The first recovery tank 7.1 collects the condensed water passing through the first condenser 6.1 and the second condenser 6.2 and discharges the condensed water from a water outlet 17; the gas which is not condensed by the first condenser 6.1 is conveyed to the second condenser 6.2 through the second steam line 18; the second liquid collecting tank 7.2 collects the condensed water discharged by the last stage heating device 1 and transmits the condensed water to the first recovery tank 7.1, and the condensed water is connected with a discharge port through a water outlet 17.
The heating device 1 of the invention can adopt steam heating or high-pressure hot water heating used in the traditional technology, and can also adopt electric heating and other modes used in other fields, and only needs to realize the purposes of increasing the temperature of the feed liquid and raising the film. The four heaters in the heating device 1 can be independently fed with heat sources to perform heating operation, but the heating device preferably adopts a steam heating or high-pressure hot water heating mode, which can stably maintain the heating temperature and reduce the influence of temperature fluctuation on the material liquid in the heating process. In addition, the heating apparatus 1 may be a tube type heating apparatus 1 or a plate type heating apparatus 1 in view of the structure thereof, but it should be ensured that the heating apparatus 1 can lift the film well, and the bubble is prevented from being broken rapidly due to the small space of the heating apparatus 1, thereby reducing the film lifting efficiency.
The feed liquid concentration device can be provided with more than multiple stages of feed liquid evaporators. The multistage feed liquid evaporators are connected in series, so that the feed liquid is concentrated step by step, and the heat is fully utilized; of course, only the first-stage feed liquid evaporator can be adopted according to actual requirements. The feed liquid concentration device in fig. 1 adopts a two-stage feed liquid evaporator. The feed liquid concentrating device in fig. 1 adopts water as a feed liquid medium, wherein the feed liquid evaporator positioned at the front side is a first-stage evaporator, the feed liquid evaporator positioned at the rear side is a second-stage evaporator, an evaporation chamber 2 of the first-stage feed liquid evaporator is communicated with a heating input pipeline of a heating device 1 of the second-stage feed liquid evaporator, namely, steam discharged from the first-stage feed liquid evaporator enters the second-stage feed liquid evaporator to be used as a heat source of the second-stage heating device, and is transmitted to the feed liquid in the second heating device through the second-stage heating device 1.
The feed liquid of the second-stage feed liquid evaporator is obtained by conveying the first-stage feed liquid evaporator. In order to transfer the feed liquid of the first-stage feed liquid evaporator to the second-stage feed liquid evaporator, a communicating pipeline is arranged in the bottom area of the first-stage feed liquid evaporator and the second-stage feed liquid evaporator, and a valve for controlling whether to be communicated is arranged on the communicating pipeline. The valves can adopt electromagnetic valves, and the delivery of feed liquid with different concentrations is realized by cooperatively controlling the opening and closing of each electromagnetic valve. As can be seen from the pipeline in fig. 1, the power-assisted circulation device 5 in each feed liquid evaporator can also be used as a power source for conveying feed liquid to the rear-stage evaporator.
Fig. 1 shows not only the core part of the feed liquid concentrating apparatus of the present invention, but also the heat source supply line associated therewith. The corresponding steam supply pipeline 8 directly provides saturated steam for the first-stage heater 1.1, the second-stage heater 1.2, the third-stage heater 1.3 and the fourth-stage heater 1.4 in the heating device 1 respectively, and the condensate outlet 9 reflows the residual steam and the condensate; the high-temperature steam discharged from the steam outlet 13 at the upper part of the evaporation chamber 2 is transmitted to the first-stage heater 1.1, the second-stage heater 1.2, the third-stage heater 1.3 and the fourth-stage heater 1.4 in the second-stage heating device to heat the second-stage heating device. In addition, a steam regulating valve and a steam trap device are respectively arranged on the steam supply pipeline 8 and the condensed water outlet 9, the steam supply quantity is automatically regulated, and the steam condensed water and the non-condensable gas in the heating device and the pipeline are automatically discharged.
In order to realize the recycling of energy, the feed liquid concentrating device in fig. 1 is further provided with a first-stage condenser 6.1, a second condenser 6.2, a first recovery tank 7.1 and a second recovery tank 7.2. The first-stage condenser 6.1 and the second condenser 6.2 can be arranged at an air outlet of the evaporation chamber 2 of the last-stage feed liquid evaporator, and the heat in the steam discharged by the last-stage feed liquid evaporator is recovered; the first-stage condenser 6.1 and the second condenser 6.2 are directly arranged at the air outlet of the evaporation chamber 2 of the last-stage feed liquid evaporator.
The condensers in the first-stage condenser 6.1 and the second condenser 6.2 can adopt a water cooling mode and also can adopt other high-performance refrigerant refrigeration modes. Particularly, for a feed liquid concentration device adopting solvents such as ethanol and the like, the first-stage condenser 6.1 and the second condenser 6.2 are preferably refrigerated by adopting high-performance refrigerants, so that the recovery efficiency of the ethanol is improved.
In an embodiment of the present invention, a feed liquid concentrating device manufactured by using the above components and having a general structure as shown in fig. 1 is provided with an electromagnetic valve at a pipeline that needs to be switched on and off at a specific time, and the operation of each electromagnetic valve is cooperatively controlled by a central control machine. After the feed liquid enters the first feed liquid evaporator through the feed liquid inlet 12, concentrated feed liquid with the concentration meeting the technological requirement is continuously produced one hour later.
Claims (2)
1. A multi-stage switching type feed liquid evaporation method comprises the following steps:
1) the feed liquid inlet sucks feed liquid into the evaporation chamber through negative pressure, the feed liquid is conveyed to the first-fourth-stage heaters through the circulating pump for circular heating, the third-stage heaters, the fourth-stage heaters and the circulating pump thereof are closed step by step along with the continuous reduction of the feed liquid, and the heating circulation is stopped; the circulating pump promotes the further heating cycle evaporation of feed liquid through first order heater, second level heater, along with the continuous reduction of feed liquid, heats to last one-level heating installation: when the volume of the feed liquid is smaller than the sum of the heating spaces of the first-stage heater and the second-stage heater, the second-stage heater heats the feed liquid, and the rest feed liquid is concentrated to realize the switching work function of the heaters;
2) when the feed liquid circulates among the heating device, the feeding loop, the evaporation chamber and the discharging loop, the tail end of the feeding loop is provided with the annular flow dividing device for distributing the liquid medicine, and the feed liquid is sprayed to the inner wall of the evaporation chamber, so that the evaporation area is increased, and the working efficiency is improved;
3) in a secondary condenser; the first recovery tank collects the condensed water passing through the first condenser and the second condenser and discharges the condensed water from a water outlet; conveying the gas which is not condensed by the first condenser to a second condenser through a second steam pipeline; the second liquid collecting tank collects the condensed water discharged by the last stage heating device and transmits the condensed water to the first recovery tank, and the condensed water is connected with a discharge outlet through a water outlet;
the multistage switching feed liquid evaporator suitable for the evaporation method mainly comprises a heating device, an evaporation chamber, a circulating pump, a secondary condensing device, a first recovery tank, a second recovery tank, a vacuum pump and corresponding pipelines; wherein,
the heating device consists of a first-stage heater, a second-stage heater, a third-stage heater and a fourth-stage heater; the first heater is connected with the second heater in series and is a first group of heater, the third heater is connected with the fourth heater in series and is a second group of heater, and the two groups of heaters are connected in parallel and then are respectively connected with the feeding loop and the discharging loop of the evaporation chamber through the circulating pump:
the secondary condensation device comprises: comprises a first condenser, a first-stage circulating water inlet and a first-stage circulating water outlet; the second condenser, a second-stage cooling water inlet and a second-stage cooling water outlet; a first recovery tank and a second recovery tank;
a steam outlet of the evaporation chamber is connected with a first-stage condenser and a second condenser in series, and the first-stage condenser and the second condenser are respectively connected with a first recovery tank; the first recovery tank and the second recovery tank are connected in series and then connected with condensate outlets of the first-stage heater and the fourth-stage heater;
the first-stage condenser is connected with the first-stage recovery tank through a first condensation water pipeline;
the second-stage condenser is connected with the first-stage recovery tank through a second steam pipeline and a third condensate pipeline; the second water condensation pipeline is connected with the third water condensation pipeline in parallel;
the water outlet of the first recovery tank is connected with a discharge outlet;
the evaporation chamber is of a sealed tank structure, the side wall of the lower part of the evaporation chamber is in an oblique cone shape, and the angle between the oblique cone and the vertical direction is 5-15 degrees; an annular flow dividing device is arranged at the upper part in the evaporation chamber and is of a hollow circular structure; a plurality of small spray holes are uniformly distributed on the periphery of the circular ring to form an annular spray pipe, the center of the circular ring is communicated with a cross pipeline, and the center of the pipeline is connected with a feeding loop at the top of the evaporation chamber; the bottom of the evaporation chamber is connected with a discharge loop, and a negative pressure environment lower than the atmospheric pressure is formed in the evaporation chamber under the negative pressure action of a vacuum pump on a steam outlet of the evaporation chamber.
2. The utility model provides a multistage switching formula feed liquid evaporimeter which characterized in that:
the device mainly comprises a heating device, an evaporation chamber, a circulating pump, a secondary condenser, a first recovery tank, a second recovery tank, a vacuum pump and corresponding pipelines; wherein,
the heating device consists of a first-stage heater, a second-stage heater, a third-stage heater and a fourth-stage heater; the first heater is connected with the second heater in series and is a first group of heater, the third heater is connected with the fourth heater in series and is a second group of heater, and the two groups of heaters are connected in parallel and then are respectively connected with the feeding loop and the discharging loop of the evaporation chamber through the circulating pump:
the secondary condenser is as follows: comprises a first condenser, a first-stage circulating water inlet and a first-stage circulating water outlet; the second condenser, a second-stage cooling water inlet and a second-stage cooling water outlet; a first recovery tank and a second recovery tank;
a steam outlet of the evaporation chamber is connected with a first-stage condenser and a second condenser in series, and the first-stage condenser and the second condenser are respectively connected with a first recovery tank; the first recovery tank and the second recovery tank are connected in series and then connected with condensate outlets of the first-stage heater and the fourth-stage heater;
the first-stage condenser is connected with the first-stage recovery tank through a first condensation water pipeline;
the second-stage condenser is connected with the first-stage recovery tank through a second steam pipeline and a third condensate pipeline; the second water condensation pipeline is connected with the third water condensation pipeline in parallel;
the water outlet of the first recovery tank is connected with a discharge outlet;
the evaporation chamber is of a sealed tank structure, the side wall of the lower part of the evaporation chamber is in an oblique cone shape, and the angle between the oblique cone and the vertical direction is 5-15 degrees; an annular flow dividing device is arranged at the upper part in the evaporation chamber and is of a hollow circular structure; a plurality of small spray holes are uniformly distributed on the periphery of the circular ring to form an annular spray pipe, the center of the circular ring is communicated with a cross pipeline, and the center of the pipeline is connected with a feeding loop at the top of the evaporation chamber; the bottom of the evaporation chamber is connected with a discharge loop, and a negative pressure environment lower than the atmospheric pressure is formed in the evaporation chamber under the negative pressure action of a vacuum pump on a steam outlet of the evaporation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479693.XA CN110075557B (en) | 2019-06-04 | 2019-06-04 | Multistage switching type feed liquid evaporation method and device |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112751105A (en) * | 2021-01-14 | 2021-05-04 | 哈尔滨工程大学 | Spray type liquid cooling power battery thermal management system based on nozzle disc type arrangement |
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