Rare earth cng high pressure bottle filling equipment and bottle filling method for metal cutting and welding

Abstract

The invention provides high-pressure bottle filling equipment and method of rare-earth CNG (Compressed Natural Gas) for cutting and welding metal. Residual gas of a CNG bottle car is recycled and prepared into rare-earth CNG metal cutting and welding gas and fills bottles at high pressure. The high-pressure bottle filling equipment comprises a base, a prying body, a pressure adjusting valve, a flow meter, a buffering tank, a gain agent filling system, a natural gas compressor, a gas storage bottle group and a gas filling machine, wherein the gain agent filling system comprises a liquid storage tank, a single chip computer controller and a liquid feeding pump; and the liquid storage tank is internally filled with a natural gas gain agent. According to the bottle filling method provided by the invention, the residual gas in the CNG bottle car is subjected to pressure drop and then is injected into the buffering tank, and the pressure of the gas is stabilized; after the natural gas gain agent is added to activate the stabilized gas, the gas is pressurized and conveyed into the gas storage bottle group through the natural gas compressor; and finally, the gas is injected into a high-pressure metal cutting and welding gas bottle by the gas filling machine, so that novel metal cutting and welding gas is provided for users. The residual gas in the CNG bottle car is recycled, and the combustion temperature of the CNG and the filling amount of the gas bottle are also improved; and the novel metal cutting and welding gas replaces existing acetylene, propane and the like to be used as the cutting and welding gas, has the advantages of high cutting and welding efficiency, low cost, environmental friendliness and high security coefficient, and has relatively high social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of CNG recovery, catalysis and high-pressure bottle filling, in particular to a rare-earth CNG high-pressure bottle filling equipment and bottle filling method for metal cutting and welding, which recycles residual gas in a CNG high-pressure bottle car, injects a gain agent for activation, and performs high-pressure bottle filling. . Background technique [0002] In the field of industrial gas in the modern world, acetylene gas is still in a monopoly position in the metal cutting and welding process. There are many defects and hidden dangers in production, storage, transportation, use, environmental protection and price, and the development has been greatly restricted. Many countries are developing new, safer and more energy-saving industrial gas. The Ministry of Machinery Industry of my country made it clear at the National Acetylene Production Conference in 1995 that it would no longer approve the constru...

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Problems solved by technology

[0003] Furthermore, since the West-East Natural Gas Pipeline was completed, CNG (compressed natural gas) and L-CNG (liquefied-compressed natural gas) vehicle filling stations have been established one after another. Generally, CNGV (compressed natural gas vehicle) filling sub-stations sell and transport every day The CNG provided by the bottle car, 2~3 cars, the residual CNG of each bottle car is about 300~500Nm 3 (2.0~3.0MPa), if not recycled, it will always remain in the high-pressure cylinder, which can not be used, but also affects the utilization rate of the cylinder volume and the economic benefits of the CNGV filling sub-station, which is also an urgent technical problem to be solved at present

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