JPS6341591A - Dry extinguishing equipment for red-hot coke and its operation - Google Patents

Abstract

PURPOSE:To provide the titled equipment and its operation so as to economize the accumulator, by directly feeding a specified portion of the whole water vapor generated in the boiler while introducing the remaining variable vapor alone into the accumulator to make said variable vapor stabilized. CONSTITUTION:A cooling gas with temperature variation circulating the main circulation system containing cooling chambers 6, 6' and 6'' is introduced into a boiler, etc., and the variable water vapor generated in the boiler is fed to a turbine 43. In this process, a vapor-generation system such as said boiler is provided with a by-pass line having an accumulator 42a, a specified amount or more of the variable vapor alone within said vapor-generation system being introduced, via said by-pass line, into the accumulator 42a; where the amount of the vapor variable is absorbed to make the vapor stabilized, the remaining specified amount of vapor being directly fed to the turbine. A gas resulting from heat exchange with the boiler, etc., is recycled to utilize as the cooling gas.

Description

[Detailed description of the invention] [Industrial application field] The present invention extinguishes and cools red-hot coke with a cooling gas,
The present invention also relates to red-hot coke dry extinguishing equipment for recovering heat and its operating method.

[Conventional technology]

An overview of a conventional red-hot coke dry extinguishing system will be explained with reference to FIG.

1 is the coke, 2 is the hopper for charging coke, 3 is the lid of the hopper 2, 4 is the grate, S, 5/, S// are the direction in which the cooling gas circulates, 6.6', 6'' are the cooling room,
7.7', 7" are cooling gas circulation prowers, 8.34 are cyclones, 9, 36 are air supply pipes, 10 are combustion chambers, 1
1 is the boiler, 12 is the excess cooling gas discharge pipe 30 is the bypass pipe, 31.35 is the proa, 37 is the valve, G is the flammable gas generated in the hopper 2, 41 is the coke formed on the grate 4 It is a moving layer.

The operation of conventional equipment having such a configuration will be explained below.

The red-hot coke 1 to be extinguished is continuously charged into the hopper 2, and then the same coke] is continuously fed onto the grate 4 in the cooling chamber 6゜6', 6'', and all the coke 1 is simultaneously charged. cooling gas 5.5' circulating in the cooling chamber 6.6', 6";
5" to extinguish the fire and cool it to below about 200℃,
Discharge outside the fire extinguishing equipment.

In addition, the cooling gases S, S/, 5// are heated by heat exchange with the coke 1, and then guided to the waste heat boiler 11 etc. through the main duct 40 and the cyclone 8'f, where they are cooled. cooling gas circulation fans 7, 7', 7"
Then, they are sent to the cooling chambers 6, 6', 6'' again, and the same action is repeated thereafter.

In addition, since the red-hot coke 1 charged to the hopper 2 cannot be completely carbonized in a coke oven (not shown), unloaded fractions in the coke are removed even during cooling in the red-hot coke dry extinguishing equipment. is generated and retained in the hopper 2 or the cooling chambers 6, 6', 6'' as flammable gas such as H2゜co.

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 combustible gas is noticeable. If the concentration of this flammable gas is high, if you open the lid 3 of the hopper 2 to charge the coke 1, there is a possibility that the flammable gas in the hopper 2 will mix with the outside air (air) and cause an explosion. Very expensive.

Therefore, a part of the cooling gas in the main body circulation system that has passed through the circulation proar 7 on the high temperature side is taken out to the virus line 3° via the bypass proar 35 before the cooling chamber 6, and the cooling gas is transferred to the hopper. The flammable gas G generated from red-hot coke in the hopper 2 is diluted and sent to the combustion chamber 10.
The combustible gas introduced into the combustion chamber 10 is combusted with air from the air supply pipe 9.

Also, at this time, the red hot coke 1 charged into the hopper 2
H2. The amount of combustible gas G such as CO generated varies greatly depending on the coke level in the hopper 2 and the residence time of the red-hot coke 1 in the hopper 2. Therefore, when the combustible gas G is almost completely burned, The temperature of the non-flammable gas flowing out of the combustion chamber 10 also varies significantly periodically.

Next, the non-flammable gas generated in the combustion chamber 10, whose gas temperature fluctuates periodically, is made to join the cooling gas of the main body circulation system, which has a constant gas temperature.

As mentioned above, the gas temperature of the cooling gas fluctuates due to its joining with the nonflammable gas, so if the cooling gas is led to the boiler 11, etc., the amount of steam generated in the boiler 11, etc. will also fluctuate according to the fluctuation of the gas temperature. do.

Therefore, in the past, all of the fluctuating steam was guided to an accumulator 42 provided on the steam generation side, stabilized by the accumulator 42, and then guided to a full steam turbine 43, etc.

[Problem that the invention seeks to solve]

In the conventional coke dry extinguishing equipment shown in Figure 2, all of the steam that is generated in the boiler and whose amount fluctuates over time is guided to the accumulator, so the problem is that the capacity of the accumulator is large and the equipment cost is high. there were.

[Means for solving the problem] When guiding the cooling gas having temperature fluctuations circulating through the body circulation system including the cooling chamber to all boilers, etc., and supplying the fluctuating steam generated in the boilers to turbines, etc., A general bypass line has an accumulator on the steam side generated by the boiler, etc., and only fluctuating steam of a certain amount or more of the generated steam is guided to the accumulator through the bypass line. The steam is sucked, stabilized, and the remaining steam is directly supplied to the turbine without being led to the accumulator. Further, the cooling gas after all heat exchange in the boiler or the like is used again as cooling gas to be circulated through the main body circulation.

(Operation) Of the total amount of steam generated in the boiler, constant steam N, which accounts for most of it, is directly supplied to the turbine without passing through the accumulator, and only the remaining fluctuating steam is guided to the accumulator.
In the same accumulator, the fluctuating steam was completely safe.

According to the above method, the accumulator can be small in size, and the accumulator can be small and economical.

〔Example〕

FIG. 1 shows an embodiment of the present invention.

Components 1 to 41 in FIG. 1 are the same as the members with the same reference numerals described above in connection with FIG. Grating, 5.5', 5'' direction of travel of the circulating cooling gas; 6.
6', 6" is the cooling room, 7.7'.

7" is the cooling gas circulation proa, 8 and 34 are the cyclones, 10 is the combustion chamber, 11 is the boiler, 12 is the discharge pipe for excess cooling gas, 30 is the bypass piping, 31°35 is the proa,
9 and 36 are air supply pipes, 37 is a valve, G is a combustible gas generated in the hopper 2, and 41 is a coke moving layer formed on the grate 4.

42a and 42b are installed on the generated steam side of the boiler 11.
With the accumulator and valve, both turbine 43
It communicates with the steam inlet.

First, the red-hot coke 1 that is about to be extinguished is
The coke 1 is then intermittently introduced into the cooling chambers 6 and 6.
The coke 1 is continuously supplied onto the grate 4 in C6".
Cooling gas 5 circulating in the same cooling chamber 6.6', 6''
．． Extinguish the fire by exchanging heat with the fire extinguishers 5' and 5", cool it to about 200°C or less, and discharge it outside the fire extinguishing equipment.

Further, the cooling gases 5, 5', 5'' are heated by heat exchange with the coke 1, and then guided to a heat exchanger such as a waste heat boiler 11 through a main duct 40 and a cyclone 8. Cooled and circulating cooling gas fans 7.7', 7
``, it is sent into the cooling chambers 6.6', 6'' again, and the same action is repeated thereafter.

Further, the cooling gas in the main body circulation system that has completely passed through the circulation blower 7 on the high temperature side is taken out to the pirus line 30 via the bypass blower 35 before the cooling chamber 60. This extracted cooling gas is sent to the hopper 2, which dilutes the flammable gas G generated from the red-hot coke in the hopper 2, and sends it to the combustion chamber 10.
The combustible gas guided inside is combusted with air from the air supply pipe 9. At this time, the H2. The amount of combustible gas G such as CO generated varies greatly depending on the coke level in the hopper 2 and the residence time of the red-hot coke 1 in the hopper 2. Therefore, when the combustible gas G is almost completely combusted, The temperature of the non-flammable gas exiting the combustion chamber 10 also fluctuates significantly periodically. The non-flammable gas whose gas temperature after the combustion chamber 10 periodically fluctuates is joined to the cooling gas of the main body circulation system.

The gas temperature of the cooling gas after the nonflammable gas joins fluctuates, so when the cooling gas is led to the boiler 11, the amount of steam generated in the boiler 11 also fluctuates in accordance with the fluctuation of the gas temperature.

That is, the amount of steam generated in the boiler 11 is KwJ as shown in FIG.

In the present invention, only the fluctuating steam A having a certain amount or more of the generated steam amount is guided to the accumulator 42a, and then to the steam full turbine 43 stabilized by the accumulator 42a.

In addition, the constant steam B is directly led to the turbine 43 through the valve 421), so that by using a small accumulator, stable steam can always be supplied to the turbine 43, etc.

From the boiler 11, through the accumulators 42a and 42f,
The amount of constant steam B directly supplied to the turbine 43 is adjusted by the opening degree of the valve 421).

〔Effect of the invention〕

Of the total steam generated in the boiler, a certain amount of steam is directly guided to the turbine, and only fluctuating steam is guided to the turbine via all the accumulators, thereby making it possible to downsize the accumulator and reduce equipment costs.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an embodiment of the red-hot coke dry extinguishing equipment of the present invention, Fig. 2 is a system diagram showing a conventional red-hot coke dry extinguishing equipment, and Fig. 3 is a system diagram showing an embodiment of the red-hot coke dry extinguishing equipment of the present invention. FIG. 2 is an explanatory diagram showing temporal fluctuations in steam amount. 1...Coke 2...Coke charging hopper 5.5', 5"...Direction in which cooling gas advances S, S/
, 6//...Cooling chamber 10...Combustion chamber 9
．． 36...Air supply pipe 42a...Accumulator 42b...Valve 43...Turbine G
...Flammable gas A...Variable Wb leading to the accumulator 76 Air B...
・Constant steam recovery agent that leads directly to the turbine, etc. Patent attorney Shige Okamoto 2 people outside the text “-1111 [

Claims (2)

[Claims] (1) A cooling gas circulation line that cools the high-temperature cooling gas that has passed through the red-hot coke cooling chamber with a heat exchanger such as a boiler and supplies it to the cooling chamber again, and a part of the cooling gas in the circulation line is charged with coke. a bypass line for supplying the gas to the hopper, mixing it with combustible gas generated from coke in the hopper, and then combusting the gas in the combustion chamber to join the high-temperature cooling gas; 1. A red-hot coke dry extinguishing equipment comprising: a turbine for supplying steam generated in a heat exchanger; and an accumulator and a valve arranged in parallel between a steam outlet of the boiler or the like and a steam inlet of the turbine. (2) A cooling gas circulation line that cools the high-temperature cooling gas that has passed through the red-hot coke cooling chamber with a heat exchanger such as a boiler and supplies it to the cooling chamber again, and a part of the cooling gas in the circulation line that is charged with coke. a bypass line for supplying the gas to the hopper, mixing it with combustible gas generated from coke in the hopper, and then combusting the gas in the combustion chamber to join the high-temperature cooling gas; In a red-hot coke dry extinguishing equipment that includes a turbine that supplies steam generated in a heat exchanger, an accumulator and a valve that are arranged in parallel between the steam outlet of the boiler, etc. and the steam inlet of the turbine, A method for operating a red-hot coke dry extinguishing equipment, characterized in that a constant amount of steam is supplied directly to the turbine via a valve, and fluctuating steam exceeding the constant amount is supplied to the turbine via an accumulator. .