lng odorant concentration control system and method
A technology for controlling system and concentration, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as not being used excessively, and the volume concentration of odorant does not meet the standard, achieve high accuracy, avoid adding The effect of excessive odorant and simple control method
Active Publication Date: 2020-08-04
湖北三江航天江北机械工程有限公司
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Problems solved by technology
If part of the odorant is adsorbed on the pipe wall and volatilizes slowly after a period of time, it is possible that the volume concentration of the odorant in the natural gas has not actually reached the standard
In addition, since the odorant will produce harmful gases such as carbon monoxide, hydrogen sulfide, and sulfur oxide after incomplete combustion, it should not be used in excess
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[0028] The present invention will be further described in detail below in conjunction with specific embodiments.
[0029] like figure 1 The shown a kind of LNG odorant concentration control system comprises gasifier 1, natural gas pipeline 2, odorizer 3, PLC system 8, the outlet of gasifier 1 communicates with the inlet of natural gas pipeline 2 through intake pipe 4, The outlet of the natural gas pipeline 2 is provided with an outlet pipe 5, the outlet of the odorizer 3 is connected to the inlet pipe 4, and the natural gas pipeline 2 is provided with a detection device 6 for monitoring the concentration of the odorant, and the detection device 6 is for detecting the concentration of tetrahydrothiophene device. A flow meter 7 for monitoring the flow of natural gas is arranged on the gas outlet pipe 5 . The concentration signal output end of the detection device 6 is connected to the concentration signal input end of the PLC system 8, the flow signal output end of the flow me...
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The invention discloses an LNG odorant concentration control system and method. The system comprises a vaporizer, a natural gas pipeline, an odorization machine and a PLC system. An outlet of the vaporizer communicates with an inlet of the natural gas pipeline through a gas inlet pipe. The outlet position of the natural gas pipeline is provided with a gas outlet pipe. An outlet of the odorizationmachine is connected with the gas inlet pipe. The natural gas pipeline is provided with a detection device for monitoring the concentration of the odorant. The gas outlet pipe is provided with a flowmeter. The concentration signal output end of the detection device is connected with the concentration signal input end of the PLC system. The flow signal output end of the flow meter is connected with the flow signal input end of the PLC system. The control signal output end of the PLC system is connected with the control signal input end of the odorization machine. The detection device is used for monitoring the odorant concentration, the flow meter is used for monitoring the natural gas flow, the work frequency of the odorization machine is controlled through obtained concentration data andflow data, and the volume concentration of the odorant in the natural gas meets the national standard.
Description
technical field [0001] The invention relates to the technical field of LNG odorization, in particular to an LNG odorant concentration control system and a method thereof. Background technique [0002] In the LNG industry, odorization is an essential part, and the precise control of its concentration is the direction of research breakthroughs for technicians. In the GB / T19206-2003 standard, it is given that the odorant of natural gas should meet the requirements of Strong, unique odor, volatility, stability during transportation and storage, and no deposits in the burner and safety devices, so it is necessary to add odor to natural gas on a regular basis. There are two commonly used methods for odorization: one is Fixed frequency odorization, add odorant according to the frequency set manually by the system; the second is automatic odorization, add odorant according to the flow signal given by the system. [0003] Usually, when the amount of natural gas consumption does not ...
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IPC IPC(8): F17D1/08F17D3/01F17D3/12
CPCF17D1/082F17D3/01F17D3/12
Inventor 邵有福曹家郝苏循志李昕月
Owner 湖北三江航天江北机械工程有限公司