JPS6060183A - Method for treating combustible gas in dry quenching equipment for red hot coke - Google Patents

Abstract

PURPOSE:To carry out safely the charging of coke, by feeding part of a inert cooling gas to a coke charging hopper, mixing it with a combustible gas generated in the hopper, mixing the mixture with air and burning the combustible gas in a catalytic reactor. CONSTITUTION:Coke 1 to be quenched is fed through a coke charging hopper 2 to a grate 4 where heat exchange between the coke 1 and a cooling inert gas 5 is conducted to quench and cool the coke, and the coke is then discharged out of the quenching equipment. The inert cooling gas 5 heated by heat exchange with the coke 1 is cooled in a waste heat boiler and circulated by means of circulating fans 7, 7', 7'' etc. to use it. Part of the inert cooling gas 5 circulated is taken up by means of a blower 35, fed to the hopper 2 and mixed with a combustible gas G generated in the hopper 2. The gas mixture is taken out of the hopper 2, mixed with air 33 and introduced into a catalytic reactor 32 to burn the combustible gas G.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating flammable gas generated in the coke charging hole ξ of a red-hot coke dry fire extinguishing membrane 4iii.

The outline of the conventional red-hot coke dry extinguishing equipment is shown in Fig. 1. (1) is the coke, (2) is the coke-challenging tadotsuba, and 13) is the s-f4) fire grate of the same hopper (2). , (5) (5') (5") is the direction in which the circulating cooling inert gas travels, (G) (+i') (+;")
is the cooling room, (71 (7') (7") is the inert gas circulation proa for cooling, (8) is the cyclone, (9) is the air supply pipe, 00) is the catalytic reactor, and (11) is the boiler. , II da is an excess cooling inert gas discharge pipe, (20) is a cooling inert gas supply pipe, and (2I) is a flammable gas discharge pipe.During normal operation, coke (1) to be extinguished is The coke (1) is intermittently charged into the hopper (2) and then continuously or intermittently fed onto the grate (4) in the cooling chamber (6) (6') (li"), Same coke (1)
is extinguished by exchanging heat with the cooling inert gas (51 (5') (5") circulating in the same cooling room (6) (fi') ([5"), and once it has cooled to below the ignition temperature, the fire is extinguished. Discharge outside the equipment. Also, inert gas for cooling (51 (5')
(5") is heated by heat exchange with coke (1), then passes through a duct and cyclone (8) to produce 4-1 heat,
It is guided to a cooling chamber (61 (6') (6") by a cooling inert gas circulation fan (71 (7') (7")), where it is cooled. hand,
The same effect will be repeated thereafter.

The red-hot coke sent to the red-hot coke dry extinguishing equipment cannot be completely carbonized in the coke oven (not shown), so even during cooling in the red-hot coke dry extinguishing equipment, unloaded fractions in the coke remain. It becomes a gas and there is N2 inside the hopper (2) or the cooling chambers (6) (6').
Remains as flammable gas such as gas. In particular, since the temperature of the hopper (2) into which the red-hot coke (1) is charged is high, the generation and retention of the above-mentioned uncarbonized flammable gas is significant.

When the concentration of this flammable gas is high, when opening the gap (3) in the hopper (2) to charge coke (1), the flammable gas in the hopper (2) and the outside air (air) will mix. hand,
Very likely to cause an explosion. Therefore, conventionally, in order to safely charge coke (1) into hopper ξ (2),
Inert gas such as N2 gas is guided into the hoppers (2) from the cooling inert gas supply pipe until the concentration of flammable gas in the hoppers (2) falls below the explosion range. The gas was discharged from the combustible gas discharge pipe Ca1).However, in such a conventional method, (1) an inert gas such as N2 gas must be specially produced, which increases running costs. (II) Since the inert gas used is usually introduced at room temperature, the coke (1) in the hopper (2)
heat dissipation increases. (1) By introducing an inert gas, the pressure inside the hole ξ(2) increases, and some flammable gas flows into the cooling chamber t6) (6') (6") with the inert gas. Since the main body circulation system including the cooling chamber (61 (6') (6") becomes a flammable atmosphere, a catalytic reactor (1α) is installed in the middle of the main body circulation system, and air supply from the air supply pipe (9) is prevented. Air and the inert gas containing the above-mentioned flammable gas are guided to the catalytic reactor (10) to burn the flammable gas in the inert gas.However, the inert gas in the main body circulation system Passing everything through the catalytic reactor α(2) has the problem of shortening the life of the catalyst and increasing running costs.

The present invention addresses the above-mentioned problems by taking out a part of the cooling inert gas circulating in the body circulation system including the cooling chamber, supplying it to the coke charging hopper, and supplying it to the coke charging hopper. The mixed gas is then taken out from the coke charging hopper and mixed with air,
This relates to a method for treating flammable gas in a red-hot coke dry extinguishing system, characterized in that the flammable gas is then guided to a catalytic reactor and burned in the catalytic reactor. The generated combustible gas can be almost completely combusted. The next charge of coke can be carried out safely. Another object of the present invention is to provide an improved method for treating flammable gas in a red-hot coke dry extinguishing system that can reduce running costs.

Next, the method for treating flammable gas in the red-hot coke dry extinguishing equipment of the present invention will be explained with reference to an embodiment shown in FIG.
1) is the coke, (2) is the coke charging hopper, and (3) is the coke charging hopper.
) is the same bottle, ξ (2) lid, (4) is the grate, (5) (
'5') (5") is the direction in which the circulating cooling inert gas travels, (61'(+;') (6") is the cooling chamber, f7
+ (7') (7") is the cooling inert gas circulation noroa, (8) C (4) is the cyclone, C (■ is the air supply pipe, Z is the catalyst reactor, (11) is the boiler, ( I21 is an excess cooling inert gas discharge pipe, equipped with a binoculars piping]
) is the knob blower C effect is the air supply pipe, (3'O is) ζ lub,
((2) is the flammable gas generated in the hopper (2).

Next, the operation of the red hot coke dry extinguishing equipment will be explained.

When the coke being processed is poorly contained and combustion of flammable gas in the coke layer is impossible, such as during startup, valve G7) is opened and the catalytic reactor (three systems are activated). flammable gas (
(2) Burn. That is, the flammable gas (G) generated in the hopper (2) is guided out of the hopper (2) by the blower 01), mixed with a predetermined amount of air sent from the air supply pipe, and then transferred to the catalytic reactor. The combustible components are almost completely combusted in the reactor (32), and then the inert gas in the main circulation system (4 (j) passes through the cooling chamber (6) and the cyclone (8) The inert gas for cooling in the main circulation system is then sent to the circulation blower (7") and cools the coke (1) by sequentially passing through the coke layer (4υ). do.

In addition, the main body circulation system passes through the circulation blower (7) on the high temperature side,
Before the cooling chamber (6), a part of the cooling inert gas passes through the bypass blower I3 to the bypass line (3).
It is taken out to Ql. This extracted inert gas is
The flammable gas (Gl) generated in the hopper (2) is diluted and sent out through the catalytic reaction. By supplying an inert gas commensurate with the amount of reactive gas (Gl) from the bypass blower C39 to the hopper (2), the flammable atmosphere in the hopper (2) can be made nonflammable within a predetermined time.

The method for treating flammable gas in the red-hot coke dry extinguishing equipment of the present invention is to take out a part of the cooling inert gas headed for the cooling chamber (6) as described above and send it to the hopper (2). (2) The flammable gas (G) generated in the hopper (2) is collected with the same cooling inert gas and sent to the catalytic reactor (32) together with air, so the flammable gas (0) generated in the hopper (2) is
can be burned almost completely.

In addition, the inert gas (combustion exhaust gas) circulating in the main body circulation system is fed into the hopper (2), and the flammable gas ((2) generated in the hopper (2) is diluted and the same Hopper (2)
Since an inert atmosphere is created inside, the next coke charge can be carried out safely. In addition, since the amount of gas processed by the catalytic reactor 02 is mainly a part of the inert gas taken out from the main body circulation system, the amount of flammable gas processed can be significantly reduced compared to conventional processing methods, and the catalyst is consumed. This has the effect of reducing running costs by preventing this as much as possible.

In addition, when the treated coke temperature is high as during steady operation, the combustible gas is sufficiently combusted by the oxygen in the coke layer, so in such a case, close the valve (37) and close the catalytic reactor G321 system. operation is stopped, and only the bypass group system is operated to transfer the flammable gas (G) generated in Hong ξ (2) to the cooling room f6) (6') (6“
), the interior of the hopper (2) can be made into an inert atmosphere until the next time the coke is charged. At this time, the combustible gas pushed into the main body circulation system passes through the circulation blower (7'') (7') of the boiler, and is then blown into the cooling chamber (6) from the blower (7). Air blown in from before the same blower (7) as the active gas ((4)
can be combusted by passing through the coke layer (41), so there is no need for expensive inert gas such as N2 gas for purging during steady operation, and there is no need to use a catalytic reactor. Therefore, there is no need for the use of N2 gas for purging, and there is no additional running cost due to exhaustion of the catalyst, and the operation can be carried out advantageously in this respect as well.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments and does not depart from the spirit of the present invention! 'lj can be modified in various ways.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing a conventional red-hot coke dry extinguishing equipment, and FIG. 2 is a system diagram showing an example of a red-hot coke dry extinguishing equipment used in carrying out the flammable gas processing method of the present invention. (11...Coke, (2+...Coke charging horn, 2, f5) (5') (5")...Inert gas for cooling, (6) (6') (6") ...Cooling room, 6
F...Catalytic reactor, (13)...Air supply pipe,
(Cil...Flammable gas. Acting agent: Patent attorney Ichi Okamoto Outside of the text: 3 people)

Claims (1)

[Claims] A part of the cooling inert gas circulating in the main circulation system including the cooling chamber is taken out, supplied to the coke charging hopper, mixed with the flammable gas generated in the hopper, and then mixed with the flammable gas generated in the coke charging hopper. The flammable gas of the red-hot coke dry extinguishing equipment is characterized in that the flammable gas is taken out from the gas coke charging hopper, mixed with air, and then guided to a catalytic reactor, where the flammable gas is combusted in the catalytic reactor. Processing method.