JPH0699686B2 - Red hot coke dry fire extinguishing equipment combustible gas treatment method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for treating flammable gas generated in a coke charging hopper of a red hot coke dry fire extinguisher facility.

[Prior Art] The outline of a conventional red hot coke dry fire extinguishing facility will be described with reference to FIG. In FIG. 2, 1 is a coke, 2 is a coke charging hopper, 3 is a lid of the hopper 2, 4 is a circulating grate, and 5, 5 ', 5 "are circulating inert gas,
6, 6 ', 6 "are cooling chambers, 7, 7', 7" are circulating blowers for cooling inert gas, 8 is a cyclone, 11 is a boiler, and 12 is an excessive cooling inert gas discharge pipe.

In such an apparatus, during normal operation, the coke 1 to be extinguished is intermittently charged into the hopper 2, and then the coke 1 is transferred onto the grate 4 which sequentially moves in the cooling chambers 6, 6 ', 6 ". Coke 1 supplied continuously or intermittently
Is extinguished by exchanging heat with the inert gas 5,5 ', 5 "for cooling which circulates in the same cooling chamber 6, 6', 6", and is cooled to below the ignition temperature and discharged to the outside of the fire extinguishing equipment. Further, the cooling inert gas 5, 5 ', 5 "is heated by heat exchange with the coke 1, and then guided to the exhaust heat boiler 11 etc. through the duct and the cyclone 8 and cooled there, where it is cooled. The active gas is recirculated to the cooling chambers 6, 6 ', 6 "by the circulation fans 7, 7', 7", and the same operation is repeated thereafter.

The red hot coke sent to the red hot coke dry fire extinguisher cannot be completely carbonized in a coke oven (not shown). Becomes gas and stays in the hopper 2 or in the cooling chambers 6, 6 ', 6 "as combustible gases such as CO and H ₂ gas. Especially, the hopper 2 in which the red hot coke 1 is charged has a temperature When the concentration of this combustible gas is high, when the lid 3 of the hopper 2 is opened to load the coke 1, the inside of the hopper 2 is opened. There is a very high possibility that an explosive mixture will occur when the flammable gas and the outside air (air) are mixed.

Therefore, in order to safely load the coke 1 into the hopper 2, a part of the circulating gas is bypassed by the blower 35.
Reversely enter the coke charging hopper 2 through 30 to the same hopper 2.
The combustible gas G generated therein is diluted with the same non-combustible gas for cooling and taken out from the same hopper 2. A predetermined amount of air 33 is mixed with this and introduced into the catalytic reactor 32, and the catalytic reactor 32
It is performed that a flammable gas is reacted in the inside to be recombined with the main body circulation system gas as an incombustible gas. As described above, the non-combustible gas is charged into the coke charging hopper 2 through the bypass pipe 30 to dilute the combustible gas G generated in the hopper 2 to make the inside of the hopper 2 a non-combustible atmosphere. The coke can be charged safely.

[Problems to be solved by the invention]

(1) Bypass gas 30 sent to coke charging hopper 2
When the flow rate of the coke increases, the amount of the cooling gas passing through the cooling chamber 5 decreases, so that the coke is cooled less.

(2) When the flow rate of the bypass gas flowing through the bypass pipe 30 increases, the amount of the cooling gas passing through the cooling chamber 5 decreases and the pressure balance in each cooling chamber collapses, so that the cooling chamber 6 ′ is compared to the cooling chamber 6. The extremely low temperature gas flows in, and the temperature of the gas supplied to the boiler decreases.

(3) The catalytic reactor 32 and the cyclone 34 for separating coke fine powder mixed in the diluted gas are required.

[Means for solving problems]

It is the same as the conventional method until a part of the circulating gas is fed to the coke charging hopper and the combustible gas in the hopper is diluted, but the diluted gas is joined with the main body system circulating gas, and then merged. A predetermined amount of air is sent into the circulating gas, and the combustible component in the gas is reacted with the non-combustible component by passing this gas through the hot coke layer.

[Work]

(1) A part of the nonflammable circulating gas is supplied to the coke charging hopper, and the flammable gas in the hopper is diluted and taken out. As a result, the combustible gas concentration in the charging hopper decreases in a relatively short time.

(2) When the gas taken out from the charging hopper is mixed with air and allowed to pass through the high temperature coke layer, the combustible components (eg CO, H ₂ ) react (burn) with the non-combustible components (eg C).
O, H ₂ O).

〔Example〕

The method for treating combustible gas in the red hot coke dry fire extinguishing equipment according to the present invention will be described with reference to one embodiment shown in FIG. 1. 1 is coke, 2 is coke charging hopper, 3 is the lid of the hopper 2, and 4 is Circulation transfer grate, 5,5 ', 5 "circulating inert gas for cooling, 6,6', 6" cooling chamber, 7,7 ', 7 "circulating inert gas blower for cooling , 8 is a cyclone, 11 is a boiler, 12 is an excessive inert gas discharge pipe for cooling, 30, 40 are bypass pipes, 31, 35, 42 are blowers, 36 are air supply pipes, 37, 4
3, 44 and 45 are valves, and G is a combustible gas generated in the hopper 2.

Next, the operation of the red hot coke dry fire extinguishing equipment will be described.
A part of the main body circulation system cooling gas is supplied to the coke charging hopper 2 from the latter stage of the blower 7 through the bypass pipe 30 by the blower 35, and the flammable gas G generated in the hopper 2 is diluted, The diluted gas is taken out from the charging hopper 2 with the blower 31, returned to the main body circulation incompetent gas 5 toward the bypass pipe 40 and the cooling chamber 6 and merged, and further the air 36 is sent into the gas by the blower 42. Then, when the mixed gas passes through the high temperature coke layer 41 in the cooling chamber 6, the combustible component reacts with oxygen to become an incombustible component. In this way, the main body circulation gas is always non-combustible gas, and by blowing this non-combustible gas into the coke charging hopper 2, the combustible gas concentration in the hopper 2 can be reduced to a predetermined concentration or less within a predetermined time. You can

〔The invention's effect〕

(1) The coke cooling is always constant regardless of the amount of gas fed into the coke charging hopper.

(2) The pressure in each cooling chamber is always balanced.

(3) A catalyst and a cyclone for treating the flammable gas generated in the hopper are unnecessary.

[Brief description of drawings]

 FIG. 1 is a schematic diagram showing an embodiment of the present invention. FIG. 2 is a schematic diagram showing a conventional technique. 1 ... Coke, 2 ... Coke charging hopper, 4 ... Grate, 5,5 ', 5 "... Cooling inert gas, 6,6', 6" ... Cooling chamber, 7,7 ′, 7 ″ …… Inert gas circulation blower for cooling, 30,40 …… Bypass piping, 31,35,42 …… Blower, 37,43,44,45 …… Valve.

Claims (1)

[Claims] 1. A part of a cooling inert gas circulating in a main body circulation system including a cooling chamber is taken out and supplied to a coke charging hopper and mixed with a combustible gas generated in the hopper. Then, the same mixed gas is taken out from the coke charging hopper, merges with the main body circulation gas, and is then mixed with air, and combustible gas is burned by contacting with high temperature coke in the cooling chamber. Method for treating flammable gas in red hot coke dry fire extinguishing equipment.