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CN-121994966-A - Natural gas full-component analysis device and method

CN121994966ACN 121994966 ACN121994966 ACN 121994966ACN-121994966-A

Abstract

The invention provides a natural gas full-component analysis device and a method, which relate to the technical field of natural gas analysis and comprise a column box, wherein one side of the top end of the column box is fixedly communicated with a plurality of branch air inlet pipes, the inner cavity of the column box is provided with a parallel chromatographic column system, the middle part of the top end of the inner cavity of the column box is fixedly connected with a plurality of suspension brackets used for reinforcing the parallel chromatographic column system, the side surface of the column box is provided with a multi-stage filtering mechanism used for filtering natural gas, and one end of each branch air inlet pipe is fixedly connected with a carrier gas inlet pipe; the parallel chromatographic column system formed by the parallel connection of the chromatographic column bodies is suitable for natural gas with complex components, the problems of incomplete separation or interference possibly existing in a single chromatographic column are effectively reduced, the accuracy of the analysis result of the device is improved, the natural gas sample just mined is filtered through the multistage filtering mechanism, and the problems that solid particles, liquid water and other impurities possibly contained in the natural gas can block the packing in the column are avoided.

Inventors

  • SONG GUOFENG

Assignees

  • 山东福泽能源有限公司

Dates

Publication Date
20260508
Application Date
20260310

Claims (9)

  1. 1. The full component analysis device for the natural gas comprises a column box (1) and is characterized in that one side of the top end of the column box (1) is fixedly communicated with a plurality of branch air inlet pipes (2), a parallel chromatographic column system (3) is arranged in an inner cavity of the column box (1), a plurality of hanging frames (4) for reinforcing the parallel chromatographic column system (3) are fixedly connected to the middle part of the top end of the inner cavity of the column box (1), a multistage filtering mechanism (5) for filtering the natural gas is arranged on the side surface of the column box (1), and one end of each branch air inlet pipe (2) is fixedly connected with a carrier gas inlet pipe (6); the parallel chromatographic column system (3) comprises a plurality of sample injection pipes (31) arranged in the inner cavity of the column box (1), wherein the output end of the sample injection pipe (31) is fixedly communicated with a chromatographic column body (32), and one end, far away from the sample injection pipe (31), of the chromatographic column body (32) is fixedly communicated with a sample outlet pipe (33); The multistage filtering mechanism (5) comprises a cyclone separator (51) for filtering particles in natural gas, a purified gas outlet pipe (52) is fixedly communicated with the output end of the cyclone separator (51), a filter element (53) is installed on one side of an inner cavity of the purified gas outlet pipe (52), and a fan (54) is installed on one side, far away from the filter element (53), of the inner cavity of the purified gas outlet pipe (52).
  2. 2. The device for analyzing the whole natural gas component according to claim 1, wherein the top end of the sample injection pipe (31) is fixedly communicated with a sealing connecting sleeve (34), the top end of the sample injection pipe (31) is fixedly communicated with the bottom end of the gas separation inlet pipe (2) through the sealing connecting sleeve (34), and a liner pipe (35) is fixedly connected to an inner cavity of the sample injection pipe (31).
  3. 3. The device for analyzing the whole natural gas component according to claim 1, wherein the sample injection pipes (31) are equidistantly designed, the middle part of the chromatographic column body (32) is spirally arranged, and the spiral part of the chromatographic column body (32) is wound on the surface of the suspension bracket (4).
  4. 4. The device for analyzing the whole natural gas components according to claim 1, wherein a main air inlet pipe (55) is fixedly communicated with one end, far away from the cyclone separator (51), of the purified gas outlet pipe (52), a plurality of shunt pipes (56) are fixedly communicated with the bottom end of the main air inlet pipe (55), one end, far away from the main air inlet pipe (55), of each shunt pipe (56) is communicated with the top end of the corresponding air inlet pipe (2), a first gas control valve (7) is arranged on the corresponding air inlet pipe (2), and a second gas control valve (57) is arranged on the corresponding main air inlet pipe (55).
  5. 5. The full component analysis device of natural gas according to claim 1, wherein a carrier gas steel bottle (8) is further arranged on the side face of the column box (1), the output end of the carrier gas steel bottle (8) is fixedly connected with a carrier gas outlet pipe (9), a third gas control valve (10) is arranged on the carrier gas outlet pipe (9), and the carrier gas outlet pipe (9) is communicated with the carrier gas inlet pipe (6).
  6. 6. The full component analysis device of natural gas according to claim 1, wherein one end of the column box (1) close to the carrier gas steel cylinder (8) is fixedly connected with a supporting base (11) and an arc-shaped fixing frame (12), a limit groove (13) is formed in the top end of the supporting base (11), and an arc-shaped limit ring (14) is arranged at one end of the arc-shaped fixing frame (12).
  7. 7. The device for analyzing the whole natural gas component according to claim 6, wherein the arc-shaped limiting ring (14) is connected with the arc-shaped fixing frame (12) by adopting a connecting piece such as a bolt, the bottom end of the carrier gas steel cylinder (8) is positioned in the inner cavity of the limiting groove (13), and the upper part of the carrier gas steel cylinder (8) is positioned in the inner cavities of the arc-shaped fixing frame (12) and the arc-shaped limiting ring (14).
  8. 8. The device for analyzing the total components of the natural gas according to claim 1, wherein a detector (15) for detecting the components of the natural gas is arranged on the other side of the top end of the column box (1), a plurality of air inlet detection inlets (16) are formed in the bottom end of the detector (15), and the outlet pipe (33) is communicated with the air inlet detection inlets (16).
  9. 9. A method of natural gas whole composition analysis, according to any one of claims 1 to 8, characterized by comprising the steps of: Firstly, communicating the extracted natural gas with the input end of a cyclone separator (51) through a pipeline, firstly separating particles from air flow in the inner cavity of the cyclone separator (51) through centrifugal force, then further filtering tiny particles and residual liquid drops through a filter element (53), simultaneously starting a fan (54) to increase the flow speed and flow rate of the gas passing through the filter element (53), and enabling filtered sample gas to enter the inner cavity of a sample inlet pipe (31) from a main air inlet pipe (55) through a plurality of shunt pipes (56) communicated with the bottom end; Providing carrier gas through a carrier gas steel cylinder (8), controlling the closure of the carrier gas steel cylinder (8) by a third gas control valve (10), enabling the carrier gas to flow to the inner cavities of a plurality of communicated carrier gas inlet pipes (6) through a carrier gas outlet pipe (9), enabling the carrier gas to flow from the plurality of carrier gas inlet pipes (6) to corresponding communicated branch inlet pipes (2), and enabling the carrier gas and a natural gas sample to enter a liner tube (35) in the inner cavity of a sample inlet pipe (31) through the branch inlet pipes (2); The filtered gas enters the main gas inlet pipe (55) from the gas purifying gas outlet pipe (52), then enters the inner cavity of the gas inlet pipe (31) from the main gas inlet pipe (55) through a plurality of shunt pipes (56) communicated with the bottom end, and the closing of the gas inlet pipe (31) is controlled through the first gas control valve (7) according to the detection requirement, so that a natural gas sample can enter the chromatographic column main body (32) through the gas inlet pipe (31) for separation treatment; And fourthly, separating the natural gas samples in different chromatographic column bodies (32) through a plurality of gas inlet pipes (2), connecting outlet pipelines of each chromatographic column body (32) to corresponding inlets of the detector (15), and finally allowing gas components separated in a plurality of gas outlet pipes (33) to enter the detector (15) through corresponding gas inlet detection inlets (16) to obtain a natural gas full-component analysis result sequentially through detection.

Description

Natural gas full-component analysis device and method Technical Field The invention relates to the technical field of natural gas component analysis, in particular to a device and a method for analyzing all components of natural gas. Background Natural gas is a multi-component mixed gaseous fossil fuel, is used as a clean and efficient energy source, has complex components and comprises hydrocarbon such as methane, ethane, propane and the like, and non-hydrocarbon components such as nitrogen, carbon dioxide, sulfide and the like, the content of each component directly influences the heat value, density, combustion performance and other key parameters of the natural gas, and further influences the energy utilization efficiency, production safety and environmental protection compliance, so that the accurate analysis of the whole components of the natural gas is a core requirement in the fields of energy industry, chemical production, environmental monitoring and the like. However, the conventional natural gas analysis mainly relies on a chemical analysis method or a single detection technology, and usually, a single chromatographic column is used for separating a natural gas sample, when natural gas components are complex, the single chromatographic column may have incomplete separation or interference problems, which affect the accuracy of analysis results, and the method cannot be applied to the condition that natural gas with complex components and a large number of samples need to be rapidly analyzed, and meanwhile, the freshly extracted natural gas may contain impurities such as particles, which cause problems such as blockage in the chromatographic column, and affect the separation or analysis effects of the natural gas sample. Disclosure of Invention The invention aims to solve the problems that the separation is incomplete or interference possibly exists in the traditional single chromatographic column detection mode, the accuracy of analysis results is affected, the method cannot be applied to natural gas with complex components and a large number of samples need to be rapidly analyzed, and meanwhile, impurities in the natural gas are easy to cause blockage. In order to solve the technical problems, the invention provides a natural gas full-component analysis device, which comprises a column box, wherein one side of the top end of the column box is fixedly communicated with a plurality of branch air inlet pipes, the inner cavity of the column box is provided with a parallel chromatographic column system, the middle part of the top end of the inner cavity of the column box is fixedly connected with a plurality of suspension brackets used for reinforcing the parallel chromatographic column system, the side surface of the column box is provided with a multistage filtering mechanism used for filtering natural gas, and one end of each branch air inlet pipe is fixedly connected with a carrier gas inlet pipe; the parallel chromatographic column system comprises a plurality of sample injection pipes arranged in the inner cavity of the column box, wherein the output end of each sample injection pipe is fixedly communicated with a chromatographic column body, and one end of each chromatographic column body far away from the sample injection pipe is fixedly communicated with a sample outlet pipe; The multistage filtering mechanism comprises a cyclone separator for filtering particles in natural gas, the output end of the cyclone separator is fixedly communicated with a purified gas outlet pipe, a filter element is installed on one side of the inner cavity of the purified gas outlet pipe, and a fan is installed on one side, far away from the filter element, of the inner cavity of the purified gas outlet pipe. Preferably, the top end of the sample feeding pipe is fixedly communicated with a sealing connecting sleeve, the top end of the sample feeding pipe is fixedly communicated with the bottom end of the sub-gas inlet pipe through the sealing connecting sleeve, and the inner cavity of the sample feeding pipe is fixedly connected with a liner pipe. Preferably, the plurality of sample feeding pipes are designed in an equidistant mode, the middle part of the chromatographic column body is arranged in a spiral mode, and the spiral part of the chromatographic column body is wound on the surface of the suspension bracket. Preferably, the one end fixed intercommunication that cyclone was kept away from to the net gas outlet duct has main intake pipe, the bottom fixed intercommunication of main intake pipe has a plurality of shunt tubes, the one end that main intake pipe was kept away from to the shunt tubes is linked together with the top of branch intake pipe, be provided with first gas control valve on the branch intake pipe, be provided with the second gas control valve on the main intake pipe. Preferably, the side of the column box is also provided with a carrier gas steel bottle, the output end of the carrier gas