RU1800231C - Gas-cleaning system - Google Patents

Abstract

SUMMARY OF THE INVENTION: the system comprises a melting unit, a filling window, a chimney, mechanical nozzles, a condenser with a hollow chamber, a knee separator, a hydrocyclone, a settling tank with vertical partitions. The gas stream is cooled, saturated with water vapor, refined, and fed to a condenser, where supersaturated water vapor condenses on the surface of fine dust particles. Gas is directed into the hollow chamber, and final drying takes place at the bottom. The liquid from the spark arrester enters the hydrocyclone, then into the settling tank, then again to the mechanical nozzles. 1 s P. f-ly, 1 ill.

Description

The invention relates to mine-type melting devices and may find application in the building materials industry in the manufacture of insulating products, in foundry and in a number of other areas of the national economy.

The aim of the invention is to increase the degree of dust collection of gases while drying them from water vapor.

The drawing shows a schematic diagram of the proposed gas purification system.

The system comprises a mine-type melting unit 1 with an air box 2 for blowing, a filling window 3, a chimney 4. In the upper part of the cupola chimney there is a wet spark arrester 5, which includes a casing with an inclined bottom 7 and a discharge pipe for slag, a confuser 8, a louvre grille 9. To prevent irrigation fluid from entering the cupola shaft, a water-cooled umbrella-reflector 10 is provided. The liquid is dispersed using mechanical nozzles 11 installed in the spark arrester confluor. To burn carbon monoxide at the level of the top top, a fan 12 is installed, which supplies additional air through the collector 13 to the upper zone of the cupola shaft. The condenser 14 is a tubular type design with water-cooled jackets. Coolant enters the condenser through a nozzle 15 located in the lower part of the annulus and then through the bypass line 16 enters the upper part. The condensation pipes are divided by the hollow chamber 17 into two zones. In the lower part of the condenser there is a knee separator 18 made in the form of perforated guides 19 with a baffle 20. The water supply system includes a hydrocyclone 21 with a tangential nozzle for introducing the liquid to be cleaned. Sump tank 22 is the second stage of water purification. It is divided verti00

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steel walls 23 into separate sections.

The cleaning system operates as follows.

As the gases move upward, a significant amount of carbon monoxide and dust is generated. The additional air supplied to the upper zone of the cupola shaft burns most of the CO to carbon dioxide. The heat generated in this case improves the heat transfer conditions between the gas and the charge materials. The remaining carbon monoxide burns out in the chimney 4 cupolas. The air required for the combustion reaction to be sucked in through the filling window 3. In the spark arrester 5, the gas stream is cooled, saturated with water vapor and is cleaned of large and medium dust fractions. Separation of coagulated particles and droplets provides. louvre droplet separator 9. After the spark arrestor, the gas stream enters the condenser 14. Here, due to the cooling of the gases, supersaturated steam is formed in the upper part, which condenses on the surface of the fine dust particles. After this section, the gas is directed to the hollow chamber 17. Since the chamber is uncooled, the supersaturation of steam is reduced and no new condensation centers are formed. Final gas dehydration takes place at the bottom of the condenser. The directed condensation growth of dust particles ensures the formation of large fractions and the possibility of their further separation from the gas using a simple knee separator 18. The purification system works with a water reverse cycle. So,

the liquid coming from the spark arrester is supplied to the cylindrical part of the hydrocyclone 21 through a tangentially directed nozzle and receives a rotational movement. As a result, 80-90% of suspended solids are released from the liquid. After the first purification step, the stream of clarified water is sent to the settling tank, where it is mixed with the liquid formed in the condenser, it is further purified and is pumped back to the spark arrester.

Thus, the use of the proposed cleaning system will provide mine-type melting devices with cost-effectiveness and will solve the problem of cleaning dust and gas emissions.

Claims (1)

Formula and Acquisition 1, a gas purification system, including a melting unit, an afterburner, a spark arrester, a water supply system, characterized in that, in order to increase the degree of dust collection of gases while drying them from water vapor, it is equipped with a condenser, the tube space of which with cooling jackets is separated by a hollow chamber, and a knee separator with perforated guides and a chipper installed in the lower part of the condenser. 2, The system according to claim 1, wherein the water supply system includes a hydroclone with a tangential nozzle for introducing liquid, a sump tank separated by vertical baffles into separate sections / wherein its inlet section is connected to a condenser drain pipe.