A method for drainage of gas pipelines in gas power plants in operation

Abstract

The invention provides a drainage method for a gas pipeline of a gas power station in operation. The drainage method for the gas pipeline of the gas power station in operation comprises the following steps of (1) selecting a drainage point, needing drainage, on the gas pipeline, (2) carrying out drilling at the bottom of the portion, with the drainage point, of the gas pipeline, cooling a drill bit while drilling, (3) carrying out tapping on a drilled hole, and (4) installing a drain valve on the drainage point. When the drainage method for the gas pipeline of the gas power station in operation is used, the problem that drainage of dead corners of pipelines is difficult due to installation of the gas pipelines can be solved, and the problem that drainage of the pipelines in the process of later-period operation of the power station is difficult due to faults of some devices or abnormal water accumulation can be solved; after modification of the gas pipeline is accomplished, maintenance is not needed, drainage can be carried out only through regular opening of the drain valve, the problem that drainage of low points or the dead corners of the gas pipeline of the gas power station in operation is difficult is thoroughly solved, the drainage effect is ideal, and the drainage method has the outstanding advantages that operation is easy, convenience is achieved, and drainage is rapid.

Description

technical field [0001] The invention relates to the technical field of gas power generation, in particular to a drainage method for a gas pipeline of a gas power station in operation. Background technique [0002] The gas pipelines of gas power plants in operation transport low-concentration gas. During the low-concentration gas transmission process, the pressure in the gas pipeline is usually used to discharge water to the positive pressure water release device to complete the water release. Therefore, in the design of the entire gas power station, positive pressure drains should be installed at fixed points according to the direction of gas pipelines and the layout of power station equipment. The water in the pipeline is drained; (2) It cannot solve the drainage problem of certain equipment failures or abnormal water accumulation pipelines during the later operation of the power station; (3) It cannot solve the drainage problem of dead corners of the pipeline caused by pip...

AI Technical Summary

Problems solved by technology

Therefore, in the design of the entire gas power station, positive pressure drains should be installed at fixed points according to the direction of gas pipelines and the layout of power station equipment. The water in the pipeline is exhausted; (2) It cannot solve the drainage problem of certain equipment failures or abnormal water accumulation pipelines during the later operation of the power station; (3) It cannot solve the drainage problem of dead corners of the pipeline caused by pipeline installation and other problems

In addition, if the gas pipeline after installation has accumulated water for a long time at the lowest point of the pipeline, it may block the pipeline after reaching a certain amount, so that the gas cannot be transmitted through the pipeline, and there is a serious safety hazard

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