Full-automatic filling system with backflow-prevention function

Abstract

The invention provides a full-automatic filling system with a backflow-prevention function. The full-automatic filling system comprises a throttling pressure reducing valve, a chemical filling tank, a pneumatic pump and a first connecting pipe used for outputting of natural gas, wherein the throttling pressure reducing valve is connected to the first connecting pipe; the parts, at the two ends of the throttling pressure reducing valve, of the first connecting pipe are connected with a second connecting pipe and a third connecting pipe correspondingly; the second connecting pipe and the third connecting pipe are connected with the pneumatic pump; the parts, at the two ends of the pneumatic pump, of the second connecting pipe and the third connecting pipe are each provided with a check valve; the pneumatic pump further communicates with the interior of the chemical filling tank through a capillary tube; and the capillary tube is further connected with the second connecting pipe through a fourth connecting pipe. Compared with the traditional filling method that a power source control system is needed to achieve filling, non-electric full-automatic filling is conducted by the filling system, the pressure difference between the front end and the rear end of the chemical filling tank is utilized to achieve the purpose of full-automatic filling, and therefore the non-electric and unattended effect can be achieved.

Description

technical field [0001] The invention relates to the field of natural gas production, and more specifically relates to a fully automatic filling system with backfill prevention. Background technique [0002] When the existing natural gas is exported, it needs to be filled with certain odorous foreign matter, such as sulfur. The existing filling method is to fill on the output pipe, that is, to use an air pump to directly inject the drug to be added into the output pipe, such as figure 1 . Since the gas in the output pipe itself has a high pressure, if you want to add foreign matter, you need a pressure equal to and greater than the pressure to add the foreign matter. This requires a lot of power consumption, and there is also a certain degree of safety. sex. Contents of the invention [0003] In view of the above, the object of the present invention is to provide a fully automatic filling system with anti-backflow, which is used to solve the problem of excessive power co...

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Problems solved by technology

[0003] In view of the above, the object of the present invention is to provide a fully automatic filling system with anti-backflow, which is used to solve the problem of excessive power consumption in the prior art when adding additives to natural gas, resulting in high costs and potential safety hazards in the output process. sexual problems

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