Device for preventing coke oven gas main pipe from forming negative pressure and using method thereof

Abstract

The invention discloses a device for preventing a coke oven gas main pipe from forming negative pressure. The device comprises the coke oven gas main pipe; a negative-pressure protection nitrogen pressurizing device is communicated with the coke oven gas main pipe; the negative-pressure protection nitrogen pressurizing device comprises a nitrogen pipeline; the nitrogen pipeline is communicated with the coke oven gas main pipe; a gas control valve is arranged on the nitrogen pipeline at the connection part of the nitrogen pipeline and the coke oven gas main pipe; and a nitrogen control valve, a nitrogen pipeline cleaning valve and a gas pressure measuring opening are respectively arranged on the nitrogen pipeline. Meanwhile, the invention further discloses a using method of the device. With the adoption of the device provided by the invention, the coke oven gas operation can be kept at a positive pressure state all along, so that the gas security operation is realized, and the negative pressure tempering explosion of gas heating equipment can be effectively prevented.

Description

technical field [0001] The invention relates to a device for preventing negative pressure from being formed in a coke oven gas main pipe and its application method. Background technique [0002] At present, the normal heating of the coke oven mainly depends on a certain pressure of the gas main pipe. In case of difficulties in the source of coke oven gas, the exchange worker will stop the heating operation through the manual reversing of the switch or the manual device of the switch. The deficiencies of the device are as follows: First, it takes 1.5-2 minutes to manually stop the gas operation of the switch, and 10-15 minutes to stop the gas operation with the hand-operated device, and sometimes the coke oven gas main pipe can form a negative pressure in 3 minutes, heating The negative pressure operation of the pipeline ≥ 800mm can easily cause the negative pressure tempering explosion of the heating pipeline, and the negative pressure of the gas main pipe may also cause the...

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Problems solved by technology

[0002] At present, the normal heating of the coke oven mainly depends on a certain pressure of the gas main pipe. In case of difficulties in the source of coke oven gas, the exchange worker will stop the heating operation through the manual reversing of the switch or the manual device of the switch. The deficiencies of the device are as follows: First, it takes 1.5-2 minutes to manually stop the gas operation of the switch, and 10-15 minutes to stop the gas operation with the hand-operated device, and sometimes the coke oven gas main pipe can form a negative pressure in 3 minutes, heating The negative pressure operation of the pipeline ≥ 800mm can easily cause the negative pressure flashback explosion of the heating pipeline, and the negative pressure of the gas main pipe may also cause the negative pressure of the gas main pipe and chemical production pipeline, which will bring serious harm to the safe operation of the coke oven

Second, in the case of the above situation, the post workers can only shorten the processing time as much as possible. If the coke oven gas main pipe has negative pressure, first shut down the coke oven gas main pipe pressure and resume heating. Control measures, and the operation of flushing the pipeline before heating can only flush the gas main pipe after the preheater, but not the gas main pipe before the preheater, which cannot guarantee the safety of gas delivery

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