RU202973U1 - Group cyclone for gas cleaning - Google Patents

Abstract

The utility model is intended for cleaning dusty gases and can be used in heat power engineering, petrochemical and metallurgical industries. The technical task of the utility model is to increase the environmental efficiency of a group cyclone by increasing the degree of cleaning and reducing emissions of fine dust particles. To solve the problem in a group cyclone containing cyclone elements, a common hopper for captured dust, a chamber for collecting cleaned gas with a gas duct and a collector made in the form of a cylinder, stepwise decreasing in diameter in height, with a tangential gas supply, with each stage equipped with branch pipes for diverting a part of the gas into the cyclone elements, located tangentially, a filter is additionally installed in the gas duct to capture fine dust particles. The proposed group cyclone allows you to clean the dust and gas flow not only from the coarse and medium dispersed phase of dust, but also fine particles, thereby increasing the st the degree of gas purification and its environmental efficiency.

Description

The utility model is intended for cleaning dusty gases and can be used in heat power engineering, petrochemical and metallurgical industries.

Known group cyclone "STsN-40-300x4", containing a supply manifold, a common chamber for cleaned gas with a gas duct, a common hopper for collecting the captured dust, four cyclonic elements containing a vertical cylindrical body with a conical bottom, equipped with a union for dust removal, an exhaust pipe , a nozzle for supplying a dusty gas flow to the apparatus, located tangentially to the body and cover. (Handbook of dust and ash collection / Edited by A.A. Rusanov. - M .: Energiya, 1975).

The cyclone works as follows: the dust and gas flow through the supply manifold is simultaneously supplied to all cyclonic elements. The dust-gas flow through the nozzle, installed tangentially to the cyclone element body, enters inward, passes in a circle around the exhaust pipe and moves spiral downward, ensuring the separation of large particles of the dispersed phase from the dispersion medium (gas). In the lower part of the body, the flow loses speed and changes its direction, as a result of which suspended particles fall out. The cleaned gases move in an upward spiral to the exhaust pipe, through which they are discharged from the cyclone element. Removal of the trapped dust particles occurs through the choke. The cleaned gas stream enters the common cleaned gas chamber, from where it enters the gas duct and then into the atmosphere.

The group cyclone "STsN-40-300x4" allows to effectively remove dust particles from the dust and gas flow only of coarse and medium dispersed phases.

The disadvantage of the known solution is the low efficiency of removing dust particles of a fine dispersed phase from the dust and gas flow. This is due to the fact that the design of the supply manifold does not allow evenly distributing the dust and gas between the cyclone elements, as a result of which the speed of the gas flow in some cyclone elements is insufficient to separate the fine dispersed phase of dust and the atmosphere is polluted.

The closest in technical essence to the claimed solution is a group cyclone for gas purification, which allows you to remove a large, medium and partially fine dispersed phase of particles from a dust and gas stream (Patent No. 59448, IPC В04С 5/12. Group cyclone for gas cleaning / V.D. Katin, R.V.Dolgov, M.Kh. Akhmyatov, A.I. Agoshkov (RF) - No. 2006123910/22; Declared 04.07.2006, publ. 27.12.2006, bull. No. 36).

The group cyclone contains cyclone elements, a common hopper for the captured dust, a chamber for collecting cleaned gas and a collector made in the form of a cylinder, stepwise decreasing in diameter in height, with a tangential gas supply, with each stage equipped with branch pipes for removing part of the gas into the cyclone elements tangentially located.

The group cyclone works as follows.

At the first stage, the dust and gas flow, getting inside the collector, passes in a circle around the exhaust pipe and moves spiral downward, providing an increase in the concentration of large particles of the dispersed phase at the cyclone wall. Part of the dusty gas with an increased concentration of coarse particles is discharged through a hole through a branch pipe to a specially selected cyclone element to remove a coarse fraction of dust. The rest of the gas stream continues to spiral downward and uncaptured fine particles are removed through the exhaust pipe. To the next degree, due to a decrease in the collector diameter, the gas velocity increases, as a result of which there is a concentration of medium particles of the gas-dispersive medium at the inner wall of the collector. Through the hole through the tangentially located branch pipe, another part of the dust-laden gas saturated with medium particles is discharged into a specially selected cyclone element for removing the middle fraction of dust, in which the uncaught medium particles are removed through the exhaust pipe. The rest of the gas flow moves spiral downward, increasing its speed due to a stepwise decrease in the collector diameter, and enters a specially selected cyclone element for removing fine dust fractions, which is a continuation of the collector. In the lower part of the body, the flow loses speed and changes its direction, as a result of which suspended particles fall out. Partially cleaned gases in the cyclone elements move through the exhaust pipe, through which they are discharged from the cyclone element. The cleaned gases from all cyclone elements enter the collection chamber and are then discharged into the atmosphere through the gas duct. The captured large and medium particles fall into a common dust collection bin.

The disadvantage of the known group cyclone is its low environmental efficiency due to the insufficient degree of cleaning the dust and gas flow from fine dust particles emitted into the atmosphere. This can be explained by the ineffective cleaning of the dust and gas flow from fine dust particles in the cyclone elements, and they are removed in sufficient concentrations into the atmosphere through the exhaust pipes into the collection chamber and the gas duct.

The technical problem to be solved by the claimed utility model is to increase the environmental efficiency of a group cyclone by reducing emissions of fine dust particles by capturing them in a gas duct.

To solve this problem in a known device containing a supply manifold, a common chamber for cleaned gas with a gas duct, a common hopper for collecting the captured dust, cyclonic elements containing a vertical cylindrical body with a conical bottom, equipped with a connection for dust removal, an exhaust pipe, a connection for supply into the apparatus of a dusty gas flow, located tangentially to the body, a cover, a manifold located in the upper part of one of the cyclone elements, is made in the form of a cylinder, stepwise decreasing in diameter in height, with a tangential gas supply, with each stage equipped with branch pipes for removing a part gas into cyclone elements located tangentially, a filter is additionally installed inside the gas duct to capture fine dust particles, which will prevent ambient air pollution and significantly increase the environmental efficiency of the group cyclone.

The feature that distinguishes the claimed technical solution from the prototype, according to the utility model, is the location of the filter inside the gas duct, which serves to clean the gases from dust. Thanks to this distinctive feature, the environmental efficiency of the group cyclone is significantly increased and the degree of gas purification from dust increases to 90%.

The proposed group cyclone for cleaning gases is illustrated in the drawing, which shows the vertical dimension of the cyclone.

The group cyclone contains cyclone elements 1, 2, 3, a common hopper for the captured dust 4, a chamber for collecting purified gas 5 and a collector 6. made in the form of a cylinder, stepwise decreasing in diameter in height, with a tangential gas supply, with each stage equipped with nozzles 7 for diverting a part of the gas into cyclone elements located tangentially, gas duct 8 for ejecting dust-free gases and a filter 9 installed inside the gas duct 8.

The group cyclone works as follows.

The dust and gas flow, getting inside the collector 6, passes in a circle around the exhaust pipe and moves spiral downward, providing an increase in the concentration of large particles of the dispersed phase at the walls of the cyclone. Part of the dusty gas with an increased concentration of large particles is discharged through the hole through the branch pipe 7 into a specially selected cyclone element 1 to remove the coarse fraction of dust. The rest of the gas flow continues to spiral downward. To the next degree, due to a decrease in the collector diameter, the gas velocity increases, as a result of which there is a concentration of medium particles of the gas-dispersive medium at the inner wall of the collector. Through the hole along the tangentially located pipe 7, another part of the dust-laden gas saturated with medium-dispersed particles is discharged into a specially selected cyclone element 2 to remove the middle fraction of dust. The remaining part of the gas flow moves spiral downward, increasing its speed due to a stepwise reduction in the collector diameter, enters a specially selected cyclone element 3 for removing fine dust fractions, which is a continuation of the collector. The dust-gas flow, getting inside the cyclone elements 1, 2, 3, passes in a circle around the exhaust pipe and moves spiral downward, ensuring the separation of particles of the dispersed phase from the dispersion medium of the gas (dust). In the lower part of the housing, the flow loses speed and changes its direction, as a result of which solid dust particles fall out. The partially cleaned ones move along an ascending spiral to the exhaust pipe, through which they are removed from the cyclone element. Gases cleaned from coarse and medium fractions from all cyclone elements enter the chamber 5 for the cleaned gas, from where they are discharged into the gas duct 8, in which an additional filter 9 is specially installed for cleaning from dust and capturing fine dust particles. Thus, in contrast to the prototype, this device makes it possible to increase the ecological efficiency of the group cyclone and to increase the degree of cleaning the dust and gas flow.

Claims (1)

Group cyclone for gas cleaning, containing a supply manifold, a common chamber for cleaned gas with a gas duct, a common hopper for collecting the captured dust, cyclone elements containing a vertical cylindrical body with a conical bottom, equipped with a connection for dust removal, an exhaust pipe, a connection for feeding into the apparatus a dusty gas flow located tangentially to the body, a cover, a collector located in the upper part of one of the cyclone elements, is made in the form of a cylinder, stepwise decreasing in diameter in height, with a tangential gas supply, while each stage is equipped with branch pipes for removing part of the gas into the cyclone elements located tangentially, characterized in that a filter is additionally installed inside the gas duct to capture fine dust particles.

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