JPS6034001B2 - Energy recovery device from red-hot coke extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for recovering energy by utilizing high temperature steam generated when extinguishing red-hot coke.

Conventionally, red-hot coke from a coke oven is transported by a coke fire extinguishing truck to a fire extinguishing tower, where it is cooled by water spraying.

At this time, a large amount of high-temperature steam is generated at once and is wasted away from the top of the fire tower. The large amount of heat contained in this high-temperature steam cannot be used effectively because it is dissipated into the atmosphere.

For this reason, when extinguishing red-hot coke, there is a dry extinguishing method in which inert gas is circulated in a sealed manner to cool the red-hot coke, and this secondary heat source is recovered using a heat exchanger to drive a turbine and recover electricity. However, due to the large capital investment and operating costs, it is not suitable as an energy-saving facility, and it also requires a large area. In addition, in conventional fire extinguishing equipment, the entire amount of red-hot coke is extinguished by receiving it in one box during one extrusion process of the coke oven machine, so the generation of steam until the next process is intermittent, resulting in an increase in the amount of steam generated. There was a big problem in continuously recovering and reusing the heat energy in the extruded steam because the steam and temperature varied significantly.

The present invention was invented in order to solve the above-mentioned drawbacks of the conventional method, and aims to recover the entire amount of steam generated when red-hot coke is extinguished in a sealed pressure container and reuse it as electrical energy. be.

Another object of the present invention is to effectively utilize separately collected water gas in order to continuously maintain the temperature change of the steam when the generation of steam is interrupted.

Still another object of the present invention is to utilize the recovered energy as electrical energy.

The present invention includes a sealed pressure container for extinguishing red-hot coke under pressure, a heat exchanger for exchanging heat with high-temperature steam generated from the pressure container, and a system for collecting water gas generated when extinguishing the fire in the pressure container. and a water gas tank for storing water gas, the water gas collected in the tank is combusted, and when the generation of high pressure steam is interrupted, the water gas is combusted so that continuous turbine power generation can be obtained. That is. Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 and 2, 1 is a coke oven that produces coke by carbonizing coal, 2 is a coke guide car that helps remove red-hot coke from the oven, and 3 is a pressure type designed to perform pressure extinguishing. Container 4 is a removable lid of pressure type container 3, 5 is a cyclone for removing dust generated when extinguishing red-hot coke, and 6 is a water gas tank 7 that supplies water gas and is installed inside the container. This is a device that generates or heats and regenerates steam using a gas burner 8. Reference numerals 9 and 9' denote heat exchangers, which are devices that generate a predetermined amount of steam necessary for the steam turbine cycle using low-pressure, high-temperature superheated steam generated from red-hot coke.

Reference numeral 10 denotes a steam turbine, which is connected to a heat exchanger 9 via piping 11 and also to a generator 12.

Similarly, 10' is an organic medium turbine, which is connected to a heat exchanger 9' via a pipe 11', which is also connected to a generator 12'.
is connected to.

Condensers 13 and 13' are connected to heat exchangers 9 and 9' via pipes 11 and 11' and pumps 14 and 14', respectively.

Reference numeral 15 denotes a water gas recovery device, which recovers and processes water gas mixed in the low-pressure, high-temperature generated steam.

The water gas recovered by this recovery device 15 is stored in a gas tank 7.
stored within. In the above configuration, the fire extinguishing vehicle 1.6 equipped with the guide wheel 2 and the pressure type container 3 is first placed at the outlet of the coke oven 1 after a predetermined carbonization time has elapsed.
is set, and red-hot coke is immersed into the pressure type container 3 by an extruder on the opposite side (not shown).

Next, the top lid 4 of the container is hermetically closed, and when the red hot coke inside the pressure type container 4, which is sprayed with hot water by a spray nozzle installed inside the top lid 4, is cooled, it instantly evaporates or evaporates from the bottom of the pressure type container 4. A large amount of heated, high-temperature superheated steam will be generated. This generated steam is directed downwardly through the superheated coke through a grate (not shown) in the lower part of the container 3 to be discharged to an external duct.

Furthermore, since this generated steam contains a large amount of dust, it is led to the cyclone 5 to separate it. The steam removed by the cyclone 5 passes through the steam regenerator 6 and enters the heat exchanger 9. Steam for the steam turbine cycle is generated in this heat exchanger 9, and this high pressure steam is transferred to the pipe line 1.
1, a steam turbine 10 is driven, and a generator 12 generates electricity to obtain electric energy. The steam that has passed through the steam turbine 10 is condensed in a condenser 13 and recirculated to the heat exchanger 9 by a pump 14.

On the other hand, the low temperature steam that has passed through the heat exchanger 9 is introduced into the second heat exchanger 9'. Here, heat is exchanged with a low-boiling medium for the organic medium turbine cycle, and this low-boiling medium is evaporated.

Thereafter, the organic medium turbine 10' is driven in the same manner as the steam turbine cycle described above, and electric energy is obtained by the generator 12'. Water gas is separated from the low-pressure steam leaving the heat exchanger 9' by a water gas recovery device 15.

The water gas separated here is stored in the gas tank 7. On the other hand, the remaining hot water can also be reused to extinguish red-hot coke in the fire extinguishing container 3.

The present invention combusts the water gas thus obtained in the steam regenerator 6 so as to continuously and stably generate steam during interruptions in the intermittent coke extinguishing operation, and stabilizes it in the steam turbine cycle. It is designed so that the electric power can be obtained by

This fire extinguishing method is a pressure-type closed green fire extinguishing method, so
The amount of heat generated during extinguishing a fire is not released to the outside and can be effectively recovered and used. In addition, since hot water is reused, no heat is lost to the outside, and as it is recycled as cooling water for red-hot coke, contaminated water is hardly discharged outside the system. . The water gas burner 8 described above can also be installed directly inside the heat exchanger 9.

[Brief explanation of drawings]

Figure 1 is a diagram showing the arrangement of working machines around the coke oven.
FIG. 2 is a schematic diagram of the recovered energy utilization device of the present invention. 6...Steam regenerator, 9,9'...Heat exchanger, 10...Steam turbine, 10'...
Organic medium bottle, 12, 12'... Generator,
15...Water gas recovery device. Figure 1 Figure 2

Claims (1)

[Claims] 1. A sealed pressure container for extinguishing red-hot coke under pressure, a heat exchanger for exchanging heat with high-temperature steam generated from the container, and a system for collecting and storing water gas temporarily generated during pressure extinguishing in the container. In a device having a water gas tank, the collected water gas is combusted so as to continuously generate steam while the generation of high temperature steam is interrupted, so that continuous turbine power generation can be obtained. A red-hot coke energy recovery device characterized by: