Method for replacing air in multiple spherical tanks at a time in serial connection mode
An internal air and spherical tank technology, applied in the container discharge method, container filling method, gas treatment/storage purpose, etc., can solve the problem of not adapting to the ground spherical tank, etc., to reduce the replacement cost, shorten the replacement time, reduce The effect of usage
Active Publication Date: 2016-11-16
长沙新奥燃气有限公司
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Problems solved by technology
[0007] The water replacement method is not suitable for the replacement of ground spherical tanks due to the load-bearing requirements
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[0023] This embodiment discloses a method for our company to replace four sub-high-pressure large-scale spherical tanks with a volume of 5,000 cubic meters at a time in the storage and distribution station. Since the replacement operation is operated continuously, more operators are needed, so this embodiment uses replacement during the day Operate the way you work with your night off.
[0024] Before the nitrogen replacement operation starts, connect the exhaust pipe of each spherical tank to the pressure gauge, relief valve and pipe before the outlet valve; connect the top of each spherical tank to the relief valve and pipe, and connect the pressure gauge to the pipe before the relief valve ;Connect the exhaust pipe at the bottom of each spherical tank with the intake pipe at the bottom of the adjacent follow-up spherical tank, and close the inlet valve and outlet valve on the inlet pipe and exhaust pipe of each spherical tank, and put the first ball The inlet pipe of the ta...
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The invention discloses a method for replacing air in multiple spherical tanks. According to the method, an exhaust pipe of one front spherical tank communicates with an air inlet pipe of the rear adjacent spherical tank. The air inlet pipe of the first spherical tank communicates with a nitrogen gas source. The serial connection replacement method is adopted, starting with pressurization replacement of the first spherical tank, nitrogen gas enters the first spherical tank and is exhausted from the last spherical tank, the air in each spherical tank is gradually exhausted from the top of the last spherical tank, the nitrogen gas plays a role in replacement all the time in the whole replacement process, the air in the front spherical tank is sequentially expelled to the rear spherical tanks, no external exhausting waste exists, and the use amount of the nitrogen gas is greatly reduced. On the other hand, the multiple spherical tanks are subjected to replacement at the same time, the replacement time is greatly shortened, labor and manpower are greatly saved, the replacement costs are greatly reduced, and the spherical tanks are put into production in advance to generate economical benefits.
Description
technical field [0001] The invention relates to a natural gas spherical tank, in particular to a method for replacing the air inside the spherical tank before it is put into operation. Background technique [0002] General natural gas storage and distribution stations are equipped with multiple sub-high-pressure large spherical tanks with large volumes. Multiple spherical tanks are connected in parallel or in series to supply gas to the gas transmission pipeline, and each spherical tank can also supply gas to the outside world separately. Before the spherical tank is put into production and operation, the tank is full of air, so the air in the tank must be replaced before it can be filled with natural gas. [0003] The current replacement methods include atmospheric pressure dilution replacement method, pressurized replacement method, vacuum replacement method and water replacement method. [0004] Atmospheric pressure dilution replacement method is to enter nitrogen from t...
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IPC IPC(8): F17C13/12F17C1/00
CPCF17C1/00F17C13/12F17C2201/0128F17C2201/052F17C2205/0138F17C2260/042
Inventor 张放民张巍刘萌张勇周学航肖烈
Owner 长沙新奥燃气有限公司