SU661194A1 - Device for removing ash from under boiler - Google Patents

Description

one

The invention relates to boiler building, in particular, to remove open-hearth dust from under the waste heat boilers of open-hearth furnaces.

Dust carried away by the gas flow from the open-hearth furnace accumulates on the heating surfaces of the waste heat boiler, condenses on them and closes the annular spaces, thereby making it difficult for the smoke exhausters to work and impairs the heat exchange of the heating surfaces. Periodically, the settled dust is removed from the heating surfaces by shaking them, followed by washing with water. Falling into a deep flue duct damp dust compresses quickly, forming a hardly soluble dense mass. The precipitate formed in the primer after a long period of operation closes the passage of open-hearth gases to the waste-heat boiler.

A device for crushing and removing slag from under steam boilers, made in the form of a horizontal body with a slag chamber and a pipe for supplying water and air, is known. At the same time, a water nozzle with a central air tube with a nozzle, in which the slag

pulp is used water- and air supplied to the slag chamber, from which the turbid pulp enters the pulp line ;; 11.

However, this device, suitable for slag removal, cannot be used to trap and remove ash as a pulverized fraction found in flue gases.

The closest technical solution to the invention is a device for removing ash from under the boiler, containing storage bins placed in the duct and connected to a collecting manifold with suction pipes, and an ejector (,. 2. "

However, this device cannot be used to remove dust from the flue recessed for several meters, as the bunker

5 would close almost all sections of the flue and would not allow the passage of open-hearth gases to the waste-heat boiler.

The aim of the invention is to reduce the cost of transporting dust, reducing ash deposits in the recovery boiler, and improving the performance of smoke exhausters.

This goal is achieved by the fact that in a device for removing ash from under the boiler, containing storage bins located in the duct and connected to a collecting manifold with suction and discharge pipelines, and an ejector, the bunkers are installed across the entire width of the duct and equipped with a crushing grinder covering them, installed at an angle of 15-20 ° to the horizontal. FIG. 1 shows the location of the storage bins in the gas duct in the profile projection; in fig. 2 - the location of the bins in the gas duct with a dust extraction system. The device consists of a baffle plate 1, passing through the entire width of the gas duct, several pyramidal storage bins 2 placed in the base and from the covering grid 3 mounted at an angle of 15-20 ° to the horizon. The baffle plate is the common rear wall of the pyramidal bunkers that have sleeves 4 welded into the collector 5 of the suction pipe installed on the supports 6. A suction pipe 7 is withdrawn from the collector 5 with the valve 8. The same pipe is connected to the pneumatic ejector 9 to which compressed air from line 10. The supply of compressed air is controlled by a valve 11. From the ejector to the collecting tank, a pressure pipe 12 is laid. The device operates as follows. The open-hearth dust, entrained by the flow of gases, passes through the horizontal section of the gas-heating system through the grate 3, strikes -.io1 ... against the baffle plate 1, changing its direction, rushing into the boiler. Some dust falls on impact with the baffle plate and is collected in pyramid bins 2, and most of the dust passes with the gas into the boiler and settles

Claims (2)

. ig.1 on its heating surfaces. When the conventional boiler tubes are shaken, loose pieces of sediment fall on the grate, are crushed and through the grate cells enter the pyramid tanks, from where they flow through the sleeves 4 into the collector and the suction pipe. Periodically opening the valve 11, the ejector 9 is turned on, and the dust accumulated in the collector 5 is exhausted into the pipeline 12. When the suction of furnace furnace gas through the pyramidal non-sludge hoppers (for example, when they are filled), the valve 8 is opened and atmospheric air is sucked through the pipe 7. For shutting off installation during the period of operation of the furnace, the system is turned off by closing the cork valve 13. The invention A device for removing ash from under the boiler, containing storage bins placed in the duct and connected to sat An orifice collector with suction and discharge pipes, and an ejector, which is designed to reduce the ash deposits in the waste-heat boiler, the bunkers are installed across the entire width of the duct and equipped with a crushing grid installed at an angle of 15-20 ° to the horizontal. Sources of information taken into consideration at the examination 1. The author's certificate of the USSR No. 95085, cl. F 23 J 1/02, 04.16.1952. 2. Uspensky V. A. “Pneumatic.Matical Transport, Sverdlovsk, 1959, p. sixteen. . 4i il iC5 u - ffFig.g From yutyy 8ozdu (3 ATM