Method for recovering relief gas in process for examining and repairing gas pipe network

Abstract

The invention discloses a recovery device for leaked gas in the maintaining operation process of gas pipe network, comprising a pressure device provided with a gas inlet and a gas outlet, a gas inlet pipeline, a gas outlet pipeline, a maintaining side pipeline, an operation side pipeline, an inert gas bomb and an air inlet; wherein the maintaining side pipeline and gas inlet pipeline are connected by a control valve (81); the operation side pipeline and gas outlet pipeline are connected by a control valve (82); the other sides of the maintaining side pipeline and operation side pipeline are respectively connected with a hose tube; the maintaining side pipeline and gas outlet pipeline are connected by a control valve (83); the operation side pipeline and gas inlet pipeline are connected by a control valve (84); the inert gas bomb is connected with the maintaining side pipeline by a control valve; and the air inlet is connected with the gas inlet pipeline by a control valve. The recovery device recycles and uses the gas wasted in traditional operation manner, polluting atmospheric environment and having potential safety hazard, substantially implements zero emission and avoids safety accident.

Description

technical field [0001] The invention relates to the technical field of urban gas pipeline network maintenance, construction and operation management. Background technique [0002] When the urban gas pipeline network has been in operation for a certain period of time, the pipeline is aging or due to various other reasons, it is inevitable that it needs to be repaired or accident rescue and repair operations. For an urban gas pipeline network with a medium scale or above, the total length of the pipeline network is generally more than 1,000 kilometers, or even tens of thousands of kilometers. Such as Beijing, Shanghai, Tianjin, Guangzhou and other cities. In one year, there are hundreds of various inspections (rush) and repairs. The following table 1 is a summary table of the basic situation of the emergency repair of the medium-pressure gas pipeline network in Guangzhou in recent years. [0003] Table 1: Summary table of emergency repairs of medium-pressure gas pipeline ne...

AI Technical Summary

Problems solved by technology

[0015] (2) Air pollution

The warm winter brought about by the greenhouse effect may cause the breeding of plant diseases and insect pests, the aggravation of drought, the melting of glaciers in the north and south poles, and the rise of sea levels, etc. The adverse consequences of direct gas emissions are obvious

[0017] (3) There are potential safety hazards

[0018] As we all know, the direct discharge of gas can easily cause safety accidents such as fire and explosion, which is a serious safety hazard.

[0019] (4) Disturbance

[0020] The direct discharge of gas is very likely to produce some noise and pungent smell, which will adversely affect the psychological and physical and mental health of residents

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