SU1600329A1 - Installation for dry quenching of coke - Google Patents

Description

(6) 07.0 .. 92. Bul. I)

(21) 399 32/26 (22) 23.12.85

(71) Ukrenergochermet Trust Production and Technical Enterprise

(72) E.A.Danilin, S.T.Pliskanoasky, V.L.Kabak, V, V.Vondarenko

and Yu.M. Volovich

(53) 662. (088.8)

(56) Patent of Japan No., cl. C 10 .B 39/02, 198;

(5) INSTALLING DRY COKE EXTINGUISHING

(57) The invention relates to the production of dry quenching of coke with the continuous unloading of quenched coke.

out of the chamber stew. The aim of the invention is to improve the working conditions of service personnel in the production area of extinguished coke by reducing its contamination with toxic gases and coke dust. The coke dry quenching plant (CDCP) contains two closed circulation circuits - cooling gas, one of which

The invention relates to equipment for the coking industry and can be used in a CCFC with continuous unloading of quenched coke.

11el of the invention - improvement of working conditions. Attendants in the unloaded area of quenched coke due to reduction of its contamination with toxic gases and coke dust by increasing the chamber’s airtightness

includes solentsnm e. gdzokhs) / 1am and chamber 1 of quenching, KO el-tilmzator 7 with a dust collecting cyclone 8 and a blower fan 9 - t other - chute 3 unloading of coke, a cyclone cyclone 8. fan 9 and saschu 1. Except These two circuits of the CDCP are equipped with an air circulation circuit, which includes the auxiliary fan 15 connected by gas pipelines 14, has a 1b duster, a candle 17, a flow regulator 18 with a pulse across the differential and a chute 3. This circuit forms an aerodynamic barrier, which improves tightness lmeru tu1ieni 1 - and provides produrku extinguished coke is removed thus from its pores and interstices mezhkuskov1h toxic ohlazhdayui; s gas. and coke dust. To do this, in the chute 3, you can connect the air circulation circuit with the fan 15 and the candle 1 / to maintain a pressure equal to the atmospheric pressure. 2 Il.

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extinguishing and purging the paged coke.

FIG. 1 shows a schematic of the proposed CDCP; in fig. 2 shows schematically the work of the aerodynamic valves of the chute formed by the cooling gas recirculation circuit and additional air circulation with approximate static pressure diagrams of the discharge of extinguished coke.

.

The proposed CDFC consists of a chamber 1 for coke quenching, a loading hatch 2, an estrus 3 for extinguished extinguished coke, a blowing device, an annular gas intake channel 5 with windows, a dust-collecting bunker 6, a waste-heat boiler 7, a dust-collecting cyclone 8, a main blowing fan 9, gas ducts 10, plugs 11, recycling gas pipeline 12 with a flow regulator 13. These elements form two closed cooling gas circulation circuits: the main circuit, which includes an extinguishing chamber 1 connected by gas ducts 10, an annular canal l 5, a bunker 6, a boiler .7, a cyclone B, a fan 9 and blowing. the device and the circuit abed the recirculation of the cooling gas, including the connected ducts 10 and the gas lines 12, the fan 9, the DUT device, the chute 3, the flow regulator 13 and the cyclone 8. The contour is equipped with a candle 11.

In addition to these two circuits, a CDCP contains an air circulation loop a b c d, which includes connected by gas pipelines I l auxiliary fan 15, dust collector 1b, candle 17, flow regulator

18 with a pulse on the 4P differential and temp 3. The shutter Dispenser 19 is installed at the outlet of the chute 3, and the conveyor 20 is located below it.

The facility functions as follows.

Red-hot coke with a temperature of lOOO-IOSO C is supplied by the coke oven car to the CDCP and loaded into the chamber т to quench the coke through charging port 2. Cooling (quenching) the coke in the chamber 1yctK is produced by a cooling (circulating) gas inert over. to coke. In this circulation, cooling of its gas occurs along said circuit abed to recirculate the cooling gas.

Stewed. In the chamber 1 coke on the chute 3 discharge and through the gate-dozato

19 is continuously supplied to conveyor 20 and further to sorting.

The cooling gas is supplied by the main blowing fan 9 through the blowing device k to the lower part of the quenching chamber 1.

Cooling gas that is at the entrance to chamber 1 is in the order of temperature ISOD

five

0

five

0

five

0

five

0

five

170 C, occurs upwardly with respect to the direction of movement of the coke through the volume of coke to be quenched. At the same time, coke is cooled to 200-250 ° C., Releasing its heat to the passing gas, which rises so that its temperature at the entrance to the annular channel 5 is 700-800 ° C. The heated gas after pre-cleaning in the dust suction bin 6 enters through gas stream 10 to boiler 7, where it gives off its heat to its heating surfaces to generate: steam. After the boiler 7, the gas cooled to 150-170 ° C is fed through the duct 10 for final cleaning into dust-collecting cyclones 8 and further to the suction side of the fan 9, and then returns to the chamber 1 of the facility on the discharge side of the duct 10..

Aerodynamic regime in the circuit abed cooling gas recirculation

Arranged so that in the upper part of chamber 1 at the loading door

. 2 maintained a pressure equal to or close to atmospheric. This prevents gas from escaping chamber 1 and contaminating the surrounding medium or air leaks into chamber 1 and enlarging. Coke burnout.

. Maintaining an aerodynamic zero, i.e. a pressure equal to atmospheric pressure, under the roof of chamber 1, is achieved by adjusting the release of cooling gas through the candle 11 included in the circuit abed. Under this pressure in. The lower part of chamber 1 at the level of the blower device k will be 200–300 kgf / m higher than atmospheric, which is caused by the need to overcome the resistance of coke to the passage of cooling gas, but at the same time creates a premise for the release of cooling of its gas through the chute 3) unloading A

To prevent the aforementioned release of cooling gas, the CDCP is equipped with

. wife of two aerodynamic closures. The first gate is formed by the circuit abed recirculation cooling

. gas, in which the regulator 13 suction of the cooling gas from the chute 3 is regulated

 It is controlled so that the pressure at the point a of the connection of the circuit to the chute 3 has a value close to atmospheric. This circuit reduces the likelihood of gas escaping from chamber 1, but does not exclude it if a given aerodynamic regime is violated in actual operating times of a CDCP,

The second aerodynamic gate is formed by the circuit a b c d of the circulation of the gas-air medium consisting predominantly of air; This circuit enhances the tightness of the extinguishing chamber 1 and, in addition, provides for the production of extinguished coke, while removing the toxic cooling gas and coke dust from its pores and inter-blocking. According to a given pressure drop йP at points a and d, controller 18 establishes such fan capacity 15 and regulates such an amount of air discharge through the candle 17i so that in estrus 3 between points a and d the pressure is maintained equal to the atmospheric pressure, which ensures the tightness of chamber 1, and the pressure at point d does not exceed the pressure at point ea

For complete and hermetic sealing of the chamber 1 from the environment, in emergency cases, a metering device 19 with a water seal is provided.

Compared with the prototype, the proposed CDTC has the following advantages:.

increased tightness of the chamber for the recovery of a CCTV from the side of Temko’s unloading of extinguished coke, which prevents the release of a toxic cooling gas from the chamber. Or air leaks into it and the reduction of coke burnout,

- simultaneously with the increase of the chamber tightness, the extinguished coke is blown out of the air, which helps to remove the toxic cooling gas from the pores of the coke and the intercore spaces and to additional cooling of the coke before unloading it onto the conveyor belt.

These advantages improve the working conditions of the serving staff.

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Nala Coke

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20

25

thirty

35

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in the discharge zone of the extinguished: a by reducing its contamination with toxic gases and coke dust.

In addition, the use of the invention creates conditions that make it possible to refrain from using special aspiration devices with fans in the discharge area and to obtain an additional effect by reducing capital costs and electricity.

Formula of invention

The coke dry quenching plant (CDCP) with its continuous discharge through the chute in the lower part of the quenching chamber, contains two closed circuits of cooling gas, one of which includes the combi- nation. The ductless quenching chamber, the recovery boiler with a cyclone dust collector and a blower fan, and the other - the recirculation loop, includes a discharge discharge of extinguished coke connected by gas pipelines with a dust cyclone, and is equipped with an automatic recirculation gas flow regulator that differs from that, in order to improve the working conditions of the staff in zone g: discharge of quenched coke by increasing the tightness of the quenching chamber and purging the unloading. The coke unit, the CDCP is equipped with an additional circuit for circulating air through the chute, which is connected to it in the course of coke movement behind the recirculation loop so that the line of injection of the additional circuit is above the suction line, and which includes gas-assisted auxiliary fans, a dust collector and an air flow controller with a discharge plug on the discharge line.

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Claims (1)

Dry coke quenching unit (CTC) with its continuous discharge through the estrus in the lower part of the quenching chamber, containing two closed circuits of cooling gas circulation, one of which includes a quenching chamber connected by gas ducts, a recovery boiler with a dust collecting cyclone and a blower fan, and the other a circuit recirculation, includes an extinguished coke unloading estrus, connected by gas pipelines to a dust collecting cyclone, and equipped with an automatic recirculation gas flow controller, characterized in that, in order to improve working conditions of staff in the quenched coke unloading zone · by increasing the tightness of the quenching chamber and blowing out the discharge. coke, STCU is equipped with an additional circuit for the circulation of air through the estrus, which is connected to it in the direction of the coke behind the recirculation loop so that the discharge line of the additional circuit is above the suction line air with a discharge candle on the discharge line.