A portable gas replacement device and replacement method

Abstract

The application discloses a portable type fuel gas replacement device and replacement method. The device comprises a tank body, wherein a gas filter is arranged at the connecting part of the inner part and the gas inlet end of the tank body, a demister is arranged at the connecting part of the inner part and the gas outlet end of the tank body, the gas outlet end of the tank body is connected with a turbulent generator, the turbulent generator communicates with the demister, and the gas inlet end of the tank body can be simultaneously connected with a plurality of gas cylinders. The replacement method comprises the following steps that: gas enters the gas filter, and solid impurities in the gas are filtered; the filtered gas enters the tank body, liquid impurities are stuck to the inner wall of the tank body, the gas then enters the demister, and tiny liquid drops in the gas are further removed; and the filtered gas enters the turbulent generator, the disturbance of gas flow is increased, and the gas flowing out of the turbulent generator is replaced with fuel gas. The application solves the problems of gas supply interruption and large gas supply pressure fluctuation, caused by gas cylinder change, and solves the problem that a replacement pipeline is corroded and even blocked by ice because the impurities in the gas enter the pipeline. The displacement effect is great.

Description

technical field [0001] The present application belongs to the technical field of gas replacement, and in particular relates to a portable gas replacement device and a method for gas replacement. Background technique [0002] During the construction, maintenance and inspection of modern urban gas maintenance, air will inevitably be trapped in the pipeline. Due to the low density of natural gas, the relative density is generally about 0.6, and the natural gas and air in the pipeline will be stratified due to density differences. The natural gas is in the upper part of the pipeline, and the air is in the lower part of the pipeline. The oxygen in the air trapped in the gas supply pipeline is mixed with the natural gas, which may reach the explosion critical value, resulting in an explosion, causing huge economic losses and casualties, and its impact will be very bad. . Therefore, it is necessary to replace the gas in the gas supply pipeline (note: the natural gas in the pipelin...

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Problems solved by technology

[0009] In view of this, this application provides a portable gas replacement device for the problems of interruption of gas supply caused by replacement of gas cylinders during gas replacement, large fluctuations in gas supply pressure, and impurities in the gas entering the replacement pipeline, causing pipeline corrosion or even ice blockage. The gas supply pressure is stable and the gas pressure fluctuation is small, which can avoid the corrosion and ice blockage of the pipeline caused by the liquid entering the pipeline, and the displacement effect is good

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