Recovery device for diffused gas of coke oven

Abstract

According to the coke oven diffused coal gas recovery device provided by the utility model, when coal gas generated in a coke oven passes through the communicating pipe 2, passes through the butterfly valve 3 and reaches the diffusing pipe 4 to be discharged, in order to avoid environmental pollution and resource waste, the butterfly valve 3 is closed, and coke oven gas passes through the branch pipe arranged on the communicating pipe 2; coke oven gas is conveyed to the gas recovery pipe 6 through the fire-retardant single exhalation valve 5 and then enters the gas collection cylinder 8 through the connecting pipe 7. Isolation doors are arranged at the two ends of the fire-retardant single-exhalation valve 5. The coke oven gas entering the gas collecting cylinder 8 can be used as fuel for power generation, heating or gas for resident life and the like. In the normal production process, the butterfly valve 3 is in a normally-closed state, and diffused coke oven gas is recovered to the gas collecting pipe 8 through the fire-retardant single exhalation valve 5. If maintenance is needed, front and rear gate valves of the fire-retardant single-exhalation valve 5 are closed, the butterfly valve 3 is opened to recover the original process, and normal production is not affected. And a steam purging pipe 11 is arranged behind the fire-retardant single-exhalation valve 5 and is used for purging when the gas pipeline 6 is blocked by crystal substances and tar.

Description

Technical Field

[0001] The utility model relates to the field of coke oven gas treatment and emission, in particular to a coke oven gas recovery device for discharged gas. Background Technique

[0002] Coke oven gas is a by-product generated during the coking process, mainly composed of carbon monoxide, methane, hydrogen, etc. Coke oven production has frequent periodicity, and there are certain fluctuations in the usage of gas users. When the gas users are in a low valley while the production of coke oven gas is at a peak, it will cause the coke oven pressure system to be unable to be adjusted normally, and at this time, measures must be taken to discharge the gas.

[0003] With the improvement of environmental protection requirements and the emphasis on energy efficiency, the recovery and utilization of coke oven gas have received more and more attention. Conventional coking plants adopt the method of directly discharging the gas into the atmosphere through a discharge pipe or manually igniting and burning the discharged gas. However, this method has environmental pollution and potential safety hazards, and it is impossible to recycle resources. Summary of the Invention

[0004] The coke oven gas recovery device for discharged gas aims to solve the problems of environmental pollution, potential safety hazards, and inability to recycle resources existing in the direct discharge of coke oven gas into the atmosphere through a discharge pipe or manual ignition and burning of the discharged gas.

[0005] To solve the above technical problems, the utility model provides a technical solution: a coke oven gas recovery device for discharged gas, which includes a coke oven end platform, a connecting pipe, and a butterfly valve discharge pipe; a connecting pipe is penetrated through the coke oven end platform to transport the gas in the coke oven to the discharge pipe. When the pressure in the pipe reaches the discharge pressure, the discharge pipe discharges the accumulated gas into the atmosphere; a butterfly valve is arranged between the connecting pipe and the discharge pipe; a rain-proof cap is fixedly arranged at the top of the discharge pipe, which can prevent rainwater from entering the discharge valve, thereby affecting the gas discharge; a branch pipe is arranged below the butterfly valve, the tail inlet of the branch pipe is fixedly connected to the connecting pipe, and the head outlet is fixedly connected to the inlet of the isolating door in front of the flame arrester; a single-call flame arrester is fixedly arranged at the outlet of the isolating door in front of the flame arrester; a isolating door behind the flame arrester is fixedly arranged at the outlet of the single-call flame arrester, and the isolating door behind the flame arrester is fixedly connected to the single-call flame arrester; a gas recovery pipe is arranged at the outlet of the isolating door behind the flame arrester, and the outlet of the isolating door behind the flame arrester is fixedly connected to the inlet of the gas recovery pipe; a isolating door in front of the gas collecting cylinder is fixedly arranged at the outlet of the gas recovery pipe; a connecting pipe is fixedly arranged at the outlet of the isolating door in front of the gas collecting cylinder; the connecting pipe is fixedly connected to the gas collecting cylinder. After closing the butterfly valve, the gas transported from the connecting pipe will pass through the branch pipe, through the single-call flame arrester, and enter the gas collecting cylinder along the gas recovery pipe. The gas entering the gas collecting cylinder can be reused as fuel, such as for power generation, heating, and domestic gas use for residents.

[0006] A steam purging pipe communicating with the inside of the gas recovery pipe is provided on the pipe wall of the gas recovery pipe. The steam purging pipe is fixedly connected to the gas recovery pipe, and the high temperature and pressure carried by the steam are used to remove residual substances inside the pipe, such as tar, impurities, etc. High-efficiency cleaning, safety, environmental protection are achieved by using the high temperature and kinetic energy of the steam.

[0007] The top of the rain cap is conical, and the outer diameter of the rain cap is larger than the outer diameter of the blow-off pipe, which can prevent rainwater and dust from entering the inside of the blow-off pipe and affecting the normal operation of the blow-off pipe. Brief Description of the Drawings

[0008] Figure 1 is a structural schematic diagram of the present utility model; Detailed Embodiments

[0009] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings: A coke oven gas recovery device includes a coke oven end platform 1, a connecting pipe 2, a butterfly valve 3, and a blow-off pipe 4; the coke oven end platform 1 is provided with a connecting pipe 2 penetrating through it; a butterfly valve 3 is arranged between the connecting pipe 2 and the blow-off pipe 4; a rain cap 13 is fixedly arranged at the top of the blow-off pipe 4 to prevent rainwater, dust, etc. from entering the blow-off valve, thereby affecting gas blow-off; a branch pipe is arranged below the butterfly valve 3, the tail inlet of the branch pipe is fixedly connected to the connecting pipe 2, and the head outlet is fixedly connected to the inlet of the isolating door 9 in front of the flame arrester; a single-call flame arrester 5 is fixedly arranged at the outlet of the isolating door 9 in front of the flame arrester. In addition to having a flame arrester function, this valve also allows gas to flow freely without flame to prevent the occurrence of fires; a isolating door 10 behind the flame arrester is fixedly arranged at the outlet of the single-call flame arrester 5, and the isolating door 10 behind the flame arrester is fixedly connected to the single-call flame arrester 5; a gas recovery pipe 6 is provided at the outlet of the isolating door 10 behind the flame arrester, and the outlet of the isolating door 10 behind the flame arrester is fixedly connected to the inlet of the gas recovery pipe 6; a isolating door 12 in front of the collecting cylinder is fixedly arranged at the outlet of the gas recovery pipe 6; a connecting pipe 7 is fixedly arranged at the outlet of the isolating door 12 in front of the collecting cylinder; the connecting pipe 7 is fixedly connected to the collecting cylinder 8. After the butterfly valve is closed, the gas conveyed from the connecting pipe will pass through the branch pipe through the single-call flame arrester and enter the collecting cylinder along the gas recovery pipe. The gas entering the collecting cylinder can be reused as fuel.

[0010] A steam purging pipe 11 communicating with the inside of the gas recovery pipe 6 is provided on the pipe wall of the gas recovery pipe 6. The steam purging pipe 11 is fixedly connected to the gas recovery pipe 6, and the high temperature and pressure carried by the steam are used to remove residual substances inside the pipe, such as tar, impurities, etc.

[0011] The top of the rain-proof cap 13 is conical, and the outer diameter of the rain-proof cap 13 is larger than the outer diameter of the relief pipe 4. It can prevent rainwater and dust from entering the inside of the relief pipe 4, affecting the normal operation of the relief pipe 4. Moreover, it can protect the inside of the pipeline, keep the pipeline dry, avoid rust and corrosion inside the pipeline, and extend the service life of the pipeline.

[0012] The working principle of the present utility model is as follows: When the coal gas generated in the coke oven is discharged through the connecting pipe 2, the butterfly valve 3 and then to the relief pipe 4, in order to avoid environmental pollution and waste of resources, the butterfly valve 3 is closed, and the coke oven gas is allowed to pass through the branch pipe provided on the connecting pipe 2, and the coke oven gas is transported to the gas recovery pipe 6 through the fire-resistant one-way valve 5, and then enters the gas collecting cylinder 8 through the connecting pipe 7. The coke oven gas entering the gas collecting cylinder 8 can be used as fuel for power generation, heating or domestic gas use, etc.

[0013] Tar and other substances are left in the pipeline after the coke oven gas passes through the pipeline. The steam purge pipe provided on the gas recovery pipe 6 can be used to clean the pipeline with high-temperature steam to prevent the pipeline from being blocked.

[0014] At the same time, by using the isolation valves provided on each pipeline, effective isolation between equipment can be achieved during equipment maintenance or when the coke oven gas needs to be discharged externally, ensuring the safety of maintenance personnel and equipment.

Claims

1. Coke oven vent gas recovery device, characterized by: The invention comprises a coke oven end platform (1), a connecting pipe (2), a butterfly valve (3), and a venting pipe (4); the coke oven end platform (1) is provided with a connecting pipe (2) running through it; a butterfly valve (3) is provided between the connecting pipe (2) and the venting pipe (4); a rainproof cap (13) is fixedly provided on the top of the venting pipe (4); a branch pipe is provided at the lower part of the butterfly valve (3); the inlet of the branch pipe at the rear end is fixedly connected to the connecting pipe (2), and the outlet of the branch pipe at the head end is fixedly connected to the inlet of the fire-blocking valve front isolation door (9); a fire-blocking single-call valve (5) is fixedly provided at the outlet of the fire-blocking valve front isolation door (9); A fire-blocking valve rear isolation door (10) is fixedly arranged at the outlet of the fire-blocking single-call valve (5), and the fire-blocking valve rear isolation door (10) is fixedly connected to the fire-blocking single-call valve (5); a gas recovery pipe (6) is provided at the outlet of the fire-blocking valve rear isolation door (10), and the outlet of the fire-blocking valve rear isolation door (10) is fixedly connected to the inlet of the gas recovery pipe (6); a gas collection cylinder front isolation door (12) is fixedly arranged at the outlet of the gas collection cylinder front isolation door (12); and a connecting pipe (7) is fixedly arranged at the outlet of the gas collection cylinder (8).

2. The coke oven vent gas recovery device according to claim 1, characterized in that: A steam purge pipe (11) communicating with the interior of the gas recovery pipe (6) is provided on the wall of the gas recovery pipe (6); the steam purge pipe (11) is fixedly connected to the gas recovery pipe (6).

3. The coke oven vent gas recovery device according to claim 1, characterized in that: The top of the rainproof cap (13) is conical.

4. The coke oven vent gas recovery device according to claim 3 is characterized in that: The outer diameter of the rainproof cap (13) is greater than the outer diameter of the discharge pipe (4).

Images