UA39288C2 - Method for coke suppression - Google Patents

Abstract

This invention deals with the methods for the coke suppression at unloading it, with simultaneous dust and gas recovering, with possibility to get useful substances. Gathering of dust and gases (ammonia, hydrogen sulfide, hydrogen cyanide, hydrocarbons, aromatic compounds, etc.) making pollution of environment is possible due to adsorption by developed surface of the snowflakes – up to 10 m2/g. Coke is suppressed by a snow jet from the first seconds of being unloaded. First tones of snow are melted up to water (I), water is heated up to boiling (II) and evaporated (III), thus cooling the coke in the car of the suppression. Such a three-step cooling makes it possible to save water, and the coke is protected at that by a vapour screen from the air oxygen as well.

Description

Description of the invention

The invention relates to coke chemical production, namely, to methods of using artificial snow for 2 extinguishing coke during its unloading with simultaneous capture of dust and gas and with the possibility of obtaining useful substances.

The invention can also be used in sintering and sintering factories, in the cement industry, as well as in steel smelting using oxygen in the Martenivsk and Bessemeriv workshops.

There is a known method of wet coke quenching, including unloading coke heated to 1000-1050" into a 710 quenching wagon, moving it to a quenching tower, irrigating it with waste water until it cools completely |11.

At the same time, dust and gases (ammonia, hydrogen sulfide, hydrogen cyanide, hydrocarbons, aromatic compounds, etc.) fly into the atmosphere, as well as coke burning occurs during its unloading and transfer to the extinguishing tower.

As a result, the environment is polluted, useful substances are lost, and coke is burned.

The task of the invention is dust and gas suppression during coke unloading, reduction of coke fume and the possibility of additional release of useful substances. The task is solved by the proposed method of extinguishing coke using a device for supplying artificial snow (2) to red-hot coke, according to which the red-hot coke is extinguished when it is unloaded from the coke oven with artificial snow directly in the fire-extinguishing car when using solid cooling; capture and deposition of gases, dust and steam released at the same time is carried out by adsorption on the developed surface of snowflakes (up to 1Ω2./g); melted snow 20 water with adsorbed substances is diverted to the separation area; reduction of coke burning is achieved due to the use of its shielding with steam from oxygen in the air, reduction of the time for its unloading and transportation in a fire-fighting car already cooled.

The method is carried out as follows. A well-known device for obtaining artificial snow is used | Fig. 11.

Water under pressure is supplied to the stabilizing chamber b through the nozzle 5, and then through the channels 7 it enters the mixing chamber c 25 with thin streams. At the same time, the compressed air is adiabatically expanded and further cooled into the mixing chamber C through nozzle 2, made in the form of (3 Laval nozzles). The cold jet of air shreds the thin streams of water, cooling them at the same time. diffuser 4, creating together with the mixing chamber

With the second Laval nozzle, it is additionally cooled. со 30 The second time the cooled snow-water-air mixture enters the cylindrical tube 8, and then into the bell 9. с

The movement of the rule 8 along the axis regulates the dispersity of the snow. From here, the fully formed snow torch flies into the atmosphere, covering the coke heated to 1000-10509С pushed out of the coke oven. high school

Figures 2 and 3 show the scheme of using artificial snow in coke production. On the FU coke battery 1 with coking chambers 5, the door removing machine 2 with devices 4 mounted on the console 9 moves

For the production of artificial snow. When the door of the coking chamber 6 is opened under the spout of the coke ejector, the red-hot coke 7 falls into the extinguishing car 3. At the same time, the devices 4 are turned on, and the snow torches cover the red-hot coke 7. At the same time, a number of processes occur that cause positive results: 1. coming into contact with the red-hot coke of the snow the mass "melts, turning into water (I), then heats up to the boiling point (I) and evaporates (HER), З7З 70 removing heat from the coke and cooling it. This three-stage icing allows you to reduce water consumption by 3.5 times (by 35095) due to the fact that snow does not have a surface tension like water. "from 2. with a sufficient density of the torch, the red-hot coke is shielded from the oxygen of the air by steam, and, as a result, its combustion stops, the emission of gases into the atmosphere decreases;

C. after the first tons of snow converted into steam, the following tons of snow will cool the coke and, finally, thanks to the large specific surface, the dust and gases released during the unloading of the coke will be adsorbed on the surface of the snowflakes. With the further melting of the snow, these substances and water from the extinguishing wagon Z (Se) will be taken to the site of their extraction by technical means. After extraction of useful substances and purification, the water can be re-supplied for the formation of snow; o 4. the supply of snow to the coke in the fire-extinguishing wagon must be carried out before it cools down to a temperature (ee) 20, excluding its combustion. Therefore, thanks to screening of coke from air oxygen, reduction of its burning time and cooling, coke fumes are reduced. After cooling, the car with coke is sent for unloading. An extinguishing tower is not required in this method. 1. Handbook of a coke chemist, vol. 2, "Metallurgy", 1965. p.165-172 2. Author's certificate of the USSR, Mo1237876, cl. 250 3/04, 15.06.1986. at

Claims (1)

The formula of the invention is) A method of extinguishing coke by supplying water to red-hot coke, which differs in that water is fed 60 directly to red-hot coke in the extinguishing car when it is unloaded from the coke oven in the form of artificial snow, the developed surface of which snowflakes adsorbs and precipitates gases, dust and steam that are released at the same time, and melted snow water with adsorbed substances is taken to the area of their release. b5