RU219651U1 - Wet gas cleaning device - Google Patents

Abstract

The utility model relates to devices for wet cleaning of gases and can be used at enterprises of thermal power engineering, chemical, construction industries, when operating technological units of large unit capacity. The technical result of the proposed utility model is to expand the range of substances removed from gases while improving the quality of purification. SUBSTANCE: device for wet cleaning of gases contains a reaction chamber in the form of a horizontal pipe-coagulator of rectangular cross section, an irrigation collector installed in the chamber, consisting of a supply pipeline and spray nozzles, which are placed in horizontal rows of an irrigation collector equidistant from each other, a plate drop eliminator located at the outlet from the chamber, while the device is additionally equipped with a tank containing two compartments - with a pure reaction solution and with a spent reaction solution, while the compartment for the spent solution is connected to the reaction products disposal system, and the compartment with the pure reaction solution is connected to the dosing system, and the irrigation the manifold is equipped with double-sided atomization nozzles, the atomization directions of which are perpendicular to the direction of the longitudinal axis of the reaction chamber, equipped with droplet eliminators. 2 ill.

Description

The utility model relates to wet gas cleaning devices and can be used at heat power, chemical, construction industries, when operating technological units of large unit capacity (boilers, kilns, etc.).

Venturi scrubbers with nozzle irrigation are known [Uzhov VN, Waldberg A.Yu. Purification of gases by wet filters. - M.: Chemistry, 1972. - S. 170-171], in which the irrigating devices are evenly distributed in the cross section of the confuser pipe-coagulator, due to which a uniform overlap of the entire section of its neck with liquid is achieved. The specified location of the nozzles, which provides a uniform density of irrigation in the neck of the pipe-coagulator, is effective only at equal values of the velocities of the purified gas in the zone of its contact with the liquid. However, in practice, especially with a large unit productivity of the scrubber, the velocity field of the gas to be cleaned can be extremely uneven. This phenomenon leads, on the one hand, to the breakthrough of dust particles not caught by drops, and, on the other hand, to excessive wasteful consumption of irrigating liquid, which reduces the degree of gas purification and the efficiency of the scrubber as a whole.

Venturi scrubbers with peripheral irrigation are known.

Peripheral irrigation is that water is supplied (usually at the beginning of the neck) with jets across the direction of the gas flow. Peripheral water supply is structurally simpler than nozzle, provides more uniform irrigation with a large cross-section of Venturi pipes, allows you to clean the water supply pipes without stopping the gas supply. (Ferrous and non-ferrous metallurgy at metallolome.ru)

The closest technical solution to the proposed one is the “Flue gas cleaning device” (see Russian Patent No. 2173209, B01D 47/10, publ. 10.09.2001). The device is a Venturi scrubber with a reaction chamber in the form of a horizontal pipe-coagulator of rectangular cross section, tangentially connected to a centrifugal drop eliminator. An irrigation collector is installed in front of the chamber neck, consisting of a supply pipeline and spray nozzles, which are placed in horizontal rows equidistant from each other. Spraying occurs in the direction of the flow of polluted air. The ratio of the number of nozzles installed in adjacent horizontal rows is proportional to the ratio of the velocities of dusty gas in the corresponding sections of the neck of the Venturi coagulator pipe. This improves the quality of cleaning dusty gases and saves the irrigation liquid.

The disadvantages of the device include the impossibility of using it to clean gases from chemical contaminants.

The technical task and the result of the proposed technical solution is to expand the range of substances removed from gases while improving the quality of purification.

This technical result is achieved by the fact that the wet gas cleaning device, containing the reaction chamber in the form of a horizontal pipe-coagulator of rectangular cross section, irrigation collector installed in the chamber, consisting of a supply pipeline and spray nozzles, which are placed in horizontal rows of the irrigation collector, equidistant from each other. another, a plate drop eliminator located at the outlet of the chamber, characterized in that the device is additionally equipped with a reservoir containing two compartments - with a clean reaction solution and with a spent reaction solution, while the compartment for the spent solution is connected to the system for utilizing the reaction products, and the compartment with with a pure reaction solution is connected to the dosing system, while the irrigation collector is equipped with double-sided spray nozzles, the spraying directions of which are perpendicular to the direction of the longitudinal axis of the reaction chamber, equipped with drop-eliminating cylinders.

In FIG. 1 shows a longitudinal section of a wet scrubbing device;

in fig. 2 is a top view (the lid of the reaction chamber is not shown).

The device for wet gas cleaning contains a reaction chamber 1 in the form of a horizontal pipe-coagulator of rectangular cross section, an irrigation manifold 2 installed in the chamber 1, consisting of a supply pipeline 3 and spray nozzles 4. The nozzles 4 are placed in horizontal rows of the irrigation manifold 2, equidistant from each other , and are equipped with drop eliminator cylinders 5. Drop eliminator cylinders 5 are designed to create uniform spraying of the solution in chamber 1 and prevent the spray of the irrigation mixture from being ejected towards the flow of polluted air outside the chamber 1. The plate drop eliminator 6 is located at the outlet of chamber 1. mixture, the drop catcher 6 is made in the form of two rows in the direction of air movement. Nozzles 4 are made of double-sided spraying, mounted on irrigation collectors 2 so that their spraying directions are perpendicular to the direction of the longitudinal axis of the reaction chamber 1 and the direction of movement of polluted air.

The irrigation mixture, which is the reaction solution or water, is supplied from compartment 7 of the tank 8 containing the pure reaction solution by means of a pump 9. The compartment 7 with the pure reaction solution is connected to the dosing system. The spent solution containing harmful substances and dust particles retained from the gas flows down from the droplet eliminator 6 into a tray (not marked) and through the pipeline 10 enters compartment 11 of the tank 8 for the spent reagent solution, which is connected to the system for the disposal of reaction products (not marked). The reaction chamber 1 is connected to a fan 13 by means of a transition pipe 12, which pumps polluted air through the reaction chamber 1 and ejects the purified air into the atmosphere.

The device is used as follows: Contaminated air is pumped through the reaction chamber 1 using a fan 13 connected to the chamber 1 by a transition pipe 12. The irrigation mixture, in the form of a reaction solution or just water, is supplied from compartment 7 of the tank 8 using a pump 9 through a pipeline 3 in 4 spray nozzles equipped with droplet eliminators 5. Double-sided spray nozzles 4 with 5 droplet eliminators create uniform spraying of the solution in chamber 1 and prevent the spray solution from being ejected towards the flow of contaminated air outside the chamber 1. In the reaction chamber 1, the contaminated gases come into contact with the supplied nozzles 4 irrigation mixture and due to the developed mass transfer surface created by spraying the reagent solution, the absorption of gaseous hazards in the air being cleaned occurs. The drop eliminators 6 located at the outlet of the reaction chamber 1 separate the purified air from the particles of the reacted and spent solution, which flows by gravity through the pipeline 10 into the compartment 11 of the reservoir 8 for the spent reagent solution. Purified from gaseous hazards and dust, the air through the transition pipe 12 enters the fan 13 and is released into the atmosphere. The spent reagent solution enters the disposal system.

The presented device for wet cleaning of gases allows you to effectively and efficiently clean ventilation emissions not only from coal dust, but also from flue gases, welding aerosols, acid fumes, ammonia and hydrogen sulfide. The direction of spraying by nozzles transverse with respect to air movement makes it possible to abandon the inlet drop eliminators and makes it possible to install the required number of rows of nozzles in the direction of air movement to achieve maximum cleaning efficiency. The device, along with high-quality cleaning, has high energy efficiency due to many times lower aerodynamic resistance and is quite compact.

Claims (1)

Device for wet gas purification, containing a reaction chamber in the form of a horizontal pipe-coagulator of rectangular cross section, an irrigation manifold installed in the chamber, consisting of a supply pipeline and spray nozzles, which are placed in horizontal rows of an irrigation manifold equidistant from each other, a plate droplet eliminator located on exit from the chamber, while the device is additionally equipped with a reservoir containing two compartments - with a pure reaction solution and with a spent reaction solution, while the compartment for the spent solution is connected to the reaction products disposal system, and the compartment with the pure reaction solution is connected to the dosing system, and the irrigation collector is equipped with double-sided spray nozzles, the spraying directions of which are perpendicular to the direction of the longitudinal axis of the reaction chamber, equipped with drop-eliminating cylinders.

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