Conveying pipeline capable of effectively isolating residual coal gas

Abstract

The utility model discloses a conveying pipeline capable of effectively isolating residual coal gas, which comprises a U-shaped pipeline connected on a linear conveying pipeline of a coal gas pipeline system, a water injection structure is arranged on one side of the U-shaped pipeline, the water injection structure comprises a water injection header pipe, a water injection branch pipe and a water injection valve, the water injection header pipe is arranged along the length direction of the linear conveying pipeline, and the water injection branch pipe is arranged along the length direction of the linear conveying pipeline. A water inlet is formed in one end of the water injection header pipe, the other end of the water injection header pipe is closed, and a water outlet of the water injection header pipe is communicated with a vertical pipe of the U-shaped pipeline through a water injection branch pipe; the two extension pipes of the U-shaped pipeline are respectively and vertically communicated with a bleeding pipe, and each bleeding pipe is provided with a bleeding valve; the top of a transverse pipe of the U-shaped pipeline is upwards communicated with an overflow pipe, and the top end of the overflow pipe is always lower than the top end of a vertical pipe of the U-shaped pipeline; the bottom of a transverse pipe of the U-shaped pipeline is communicated with a blow-off pipe downwards, and a blow-off valve is installed on the blow-off pipe.

Description

Technical Field:

[0001] The utility model relates to the technical field of coking, and particularly relates to a conveying pipeline that can effectively isolate residual gas. Background Art:

[0002] In the coking process, a gas pipeline system is used to convey heating gas to a coke oven. Currently, the pipelines used in the gas pipeline system are all straight pipelines. When the coke oven stops production, it is impossible to effectively isolate the residual gas in the gas pipeline system from continuing to enter the coke oven, and a large amount of gas often accumulates, causing safety accidents such as poisoning of personnel and explosion of pipelines. Content of the Utility Model:

[0003] The purpose of the utility model is to provide a conveying pipeline that can effectively isolate residual gas.

[0004] The purpose of the utility model is implemented by the following technical solution: A conveying pipeline that can effectively isolate residual gas includes a U-shaped pipeline connected to a straight conveying pipeline of a gas pipeline system. An injection structure is installed on one side of the U-shaped pipeline. The injection structure includes an injection main pipe, injection branch pipes, and an injection valve. The injection main pipe is arranged along the length direction of the straight conveying pipeline. One end of the injection main pipe is provided with a water inlet, and the injection valve is provided on the injection main pipe near the water inlet. The other end of the injection main pipe is closed. The water outlet of the injection main pipe is connected to the vertical pipe of the U-shaped pipeline through the injection branch pipes. On each of the two extension pipes of the U-shaped pipeline, a vent pipe is connected upward, and a vent valve is installed on each vent pipe. An overflow pipe is connected upward at the top of the horizontal pipe of the U-shaped pipeline, and the top end of the overflow pipe is always lower than the top end of the vertical pipe of the U-shaped pipeline. A drain pipe is connected downward at the bottom of the horizontal pipe of the U-shaped pipeline, and a drain valve is installed on the drain pipe.

[0005] Preferably, the U-shaped pipeline includes the horizontal pipe, two vertical pipes, and two extension pipes; one vertical pipe is connected to each end of the horizontal pipe, and one horizontally arranged extension pipe is connected to the top end of each vertical pipe.

[0006] Preferably, the top end of the overflow pipe is connected to the drain pipe through a flushing pipeline.

[0007] Preferably, two water outlets are provided at intervals on the injection main pipe, and the water outlets of the injection main pipe are respectively connected to the corresponding vertical pipes of the U-shaped pipeline through the injection branch pipes.

[0008] Preferably, a liquid level sensor is provided in the vertical pipe of the U-shaped pipe, and the upper limit value of the liquid level set by the liquid level sensor is higher than the top height of the overflow pipe. The liquid level sensor is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the water injection valve.

[0009] Preferably, a dispersion head communicating with the dispersion pipe is fixed at the top end of each dispersion pipe, and the dispersion head is a horizontally arranged tubular structure.

[0010] Advantages of the present utility model: First, the present utility model is provided with a U-shaped pipe, and a water injection structure is installed on one side of the U-shaped pipe. By injecting water into the water injection main pipe, the water enters the U-shaped pipe through the water injection branch pipe. When the entire horizontal pipe of the U-shaped pipe is filled with water, a water seal is formed, effectively isolating the residual gas in the gas pipeline system from continuing to enter the coke oven. On the two extension pipes of the U-shaped pipe, dispersion pipes are respectively vertically and upwardly communicated. When a water seal is formed in the U-shaped pipe, inert gases such as nitrogen are used to blow the U-shaped pipe respectively from the gas supply device and the coke oven along the straight pipeline of the gas pipeline system, and the residual gas in the gas pipeline system is discharged through the dispersion pipe, avoiding safety accidents such as gas accumulation causing poisoning of personnel and pipeline explosion.

[0011] Second, the present utility model is vertically and upwardly communicated with an overflow pipe at the top of the horizontal pipe of the U-shaped pipe, and the overflow pipe can prevent water from entering the straight pipeline of the gas pipeline system due to insufficient personnel monitoring. In addition, a liquid level sensor is provided in the vertical pipe of the U-shaped pipe. The liquid level sensor is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the water injection valve. The liquid level in the vertical pipe of the U-shaped pipe can be monitored in real time through the liquid level sensor. When the water injection speed is relatively fast and the liquid level is higher than the top height of the overflow pipe and reaches the upper limit value of the liquid level set by the liquid level sensor, a signal is transmitted to the controller, and the controller can control the water injection valve to close in time. Description of the drawings:

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative labor, other drawings can also be obtained based on these drawings.

[0013] Figure 1 is a schematic structural diagram of the present utility model.

[0014] Figure 2 is Figure 1 the left view of

[0015] The markings of each component in the attached drawings are as follows: U-shaped pipe 1, horizontal pipe 1.1, vertical pipe 1.2, extension pipe 1.3, water injection structure 2, water injection main pipe 2.1, water injection branch pipe 2.2, water injection valve 2.3, blow-off pipe 3, blow-off head 4, blow-off valve 5, sewage pipe 6, sewage valve 7, overflow pipe 8, flushing pipeline 9, liquid level sensor 10, controller 11. Detailed implementation manners:

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0017] As Figures 1-2 shown, a conveying pipeline that effectively isolates residual gas includes a U-shaped pipe 1 connected to a straight conveying pipeline of a gas pipeline system. The U-shaped pipe 1 is used to convey heating gas to a coke oven. The U-shaped pipe 1 includes a horizontal pipe 1.1, two vertical pipes 1.2, and two extension pipes 1.3. One vertical pipe 1.2 is connected to each end of the horizontal pipe 1.1, and a horizontally arranged extension pipe 1.3 is connected to the top of each vertical pipe 1.2. A water injection structure 2 is installed on one side of the U-shaped pipe 1. The water injection structure 2 includes a water injection main pipe 2.1, a water injection branch pipe 2.2, and a water injection valve 2.3. The water injection main pipe 2.1 is arranged along the length direction of the straight conveying pipeline. One end of the water injection main pipe 2.1 is provided with a water inlet, and a water injection valve 2.3 is provided on the water injection main pipe 2.1 near the water inlet. The other end of the water injection main pipe 2.1 is closed. Two water outlets are provided at intervals on the water injection main pipe 2.1. Each water outlet of the water injection main pipe 2.1 is communicated with the corresponding vertical pipe 1.2 of the U-shaped pipe 1 through a water injection branch pipe 2.2. By injecting water into the water injection main pipe 2.1, the water enters the U-shaped pipe 1 through the water injection branch pipe 2.2. When the water fills the entire horizontal pipe 1.1 of the U-shaped pipe 1, a water seal is formed, effectively isolating the residual gas in the gas pipeline system from continuing to enter the coke oven and avoiding safety accidents such as poisoning of personnel and explosion of the pipeline caused by the accumulation of a large amount of gas.

[0018] Blow-off pipes 3 are vertically and upwardly communicated with the two extension pipes 1.3 of the U-shaped pipe 1 respectively. A blow-off head 4 communicated with the blow-off pipe 3 is fixed at the top of each blow-off pipe 3. The blow-off head 4 is a horizontally arranged tubular structure. A blow-off valve 5 is installed on each blow-off pipe 3. When a water seal is formed in the U-shaped pipe 1, inert gases such as nitrogen are used to blow through the U-shaped pipe 1 from the gas supply device and the coke oven along the straight conveying pipeline of the gas pipeline system respectively, and the residual gas in the gas pipeline system is discharged through the blow-off pipes 3, avoiding the accumulation of a large amount of gas in the gas pipeline system.

[0019] At the bottom of the horizontal pipe 1.1 of the U-shaped pipe 1, a sewage discharge pipe 6 is vertically connected downward, and a sewage discharge valve 7 is installed on the sewage discharge pipe 6; at the top of the horizontal pipe 1.1 of the U-shaped pipe 1, an overflow pipe 8 is vertically connected upward. The height of the overflow pipe 8 is 1200 mm, which can effectively seal the gas pressure of 12000 Pa. The top end of the overflow pipe 8 is always lower than the top end of the vertical pipe 1.2 of the U-shaped pipe 1. The setting of the overflow pipe 8 can prevent water from entering the straight conveying pipeline of the gas pipe system due to the inattentive monitoring of personnel. The top end of the overflow pipe 8 is connected to the sewage discharge pipe 6 through a flushing pipeline 9. The water overflowing from the top end of the overflow pipe 8 enters the sewage discharge pipe 6 through the flushing pipeline 9 to flush the sewage discharge pipe 6 and prevent the sewage discharge pipe 6 from being blocked;

[0020] A liquid level sensor 10 is provided in the vertical pipe 1.2 of the U-shaped pipe 1. The set upper limit value of the liquid level of the liquid level sensor 10 is higher than the height of the top end of the overflow pipe 8. The liquid level in the vertical pipe 1.2 of the U-shaped pipe 1 can be monitored in real time through the liquid level sensor 10. The signal input end of the liquid level sensor 10 is electrically connected to the signal input end of the controller 11, and the signal output end of the controller 11 is electrically connected to the water injection valve 2.3. When the water injection speed is relatively fast and the liquid level is higher than the height of the top end of the overflow pipe 8 and reaches the set upper limit value of the liquid level of the liquid level sensor 10, a signal is transmitted to the controller 11, and the controller 11 can control the water injection valve 2.3 to close in time.

[0021] Working process: When the coke oven stops production, first, open the water injection valve 2.3 to inject water into the water injection main pipe 2.1, so that the water enters the U-shaped pipe 1 through the water injection branch pipe 2.2. When the water fills the entire horizontal pipe 1.1 of the U-shaped pipe 1, a water seal is formed to effectively isolate the remaining gas in the gas pipe system from continuing to enter the coke oven; at the same time, after the water fills the entire horizontal pipe 1.1 of the U-shaped pipe 1, it enters the overflow pipe 8, overflows into the flushing pipeline 9, and enters the sewage discharge pipe 6 through the flushing pipeline 9 to flush the sewage discharge pipe 6; when the liquid level sensor 10 in the U-shaped pipe 1 monitors that the liquid level reaches the upper limit value, a signal is transmitted to the controller 11, and the controller 11 automatically controls the water injection valve 2.3 to close; then, open the gas release valve 5, and use inert gases such as nitrogen to blow the U-shaped pipe 1 along the straight conveying pipeline of the gas pipe system from the gas supply device and the coke oven respectively, and discharge the remaining gas in the gas pipe system through the gas release pipe 3; finally, when the gas release is completed, open the sewage discharge valve 7 to discharge the water in the horizontal pipe 1.1 of the U-shaped pipe 1 and the impurities deposited at the bottom through the sewage discharge pipe 6 together.

[0022] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A conveying pipeline that effectively isolates residual gas, characterized in that, It includes a U-shaped pipe connected to the straight conveying pipeline of the gas pipeline system. An injection water structure is installed on one side of the U-shaped pipe. The injection water structure includes an injection water main pipe, injection water branch pipes and injection water valves. The injection water main pipe is arranged along the length direction of the straight conveying pipeline. One end of the injection water main pipe is provided with a water inlet, and the injection water valve is provided on the injection water main pipe near the water inlet. The other end of the injection water main pipe is closed. The water outlet of the injection water main pipe is communicated with the vertical pipe of the U-shaped pipe through the injection water branch pipes; on the two extension pipes of the U-shaped pipe, gas release pipes are respectively communicated upwards, and a gas release valve is installed on each gas release pipe; on the top of the horizontal pipe of the U-shaped pipe, an overflow pipe is communicated upwards, and the top end of the overflow pipe is always lower than the top end of the vertical pipe of the U-shaped pipe; on the bottom of the horizontal pipe of the U-shaped pipe, a sewage discharge pipe is communicated downwards, and a sewage discharge valve is installed on the sewage discharge pipe.

2. The conveying pipeline for effectively isolating residual gas according to claim 1, wherein, The U-shaped pipe includes the horizontal pipe, two vertical pipes and two extension pipes; one vertical pipe is connected to each end of the horizontal pipe, and a horizontally arranged extension pipe is connected to the top end of each vertical pipe.

3. A conveying pipeline for effectively isolating residual gas according to claim 1 or 2, characterized in that, The top end of the overflow pipe is communicated with the sewage discharge pipe through a flushing pipeline.

4. The conveying pipeline for effectively isolating residual gas according to claim 3, characterized in that, Two water outlets are arranged at intervals on the injection water main pipe, and the water outlets of the injection water main pipe are respectively communicated with the corresponding vertical pipes of the U-shaped pipe through the injection water branch pipes.

5. The conveying pipeline for effectively isolating residual gas according to claim 1, wherein A liquid level sensor is arranged in the vertical pipe of the U-shaped pipe, and the set upper liquid level value of the liquid level sensor is higher than the height of the top end of the overflow pipe. The liquid level sensor is electrically connected to the signal input end of the controller, and the signal output end of the controller is electrically connected to the injection water valve.

6. A conveying pipeline for effectively isolating residual gas according to claim 1, characterized in that, At the top end of each gas release pipe, a gas release head communicated with the gas release pipe is fixed, and the gas release head is a horizontally arranged tubular structure.

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