A chromatograph hydrogen closed loop circulation control device and method

Abstract

The application discloses a chromatograph hydrogen closed loop circulation control device and method, relates to the technical field of hydrogen flame chromatograph, and comprises a chromatograph main body, a ten-way valve, a multistage electromagnetic gas circuit control module, an integrated control module and a ten-way valve control module are fixedly installed in the chromatograph main body; the ten-way valve is fixedly connected with the multistage electromagnetic gas circuit control module through a gas circuit pipeline set, the gas circuit pipeline set comprises a hydrogen pipeline and an air pipeline, the hydrogen pipeline introduces hydrogen into the multistage electromagnetic gas circuit control module, and the air pipeline introduces air into the multistage electromagnetic gas circuit control module and the ten-way valve; the ten-way valve is further connected with a component identifier; the integrated control module is electrically connected with the multistage electromagnetic gas circuit control module and controls the ten-way valve control module, and the integrated control module is used for controlling the multistage electromagnetic gas circuit control module and the ten-way valve control module. The application can realize hydrogen reuse, reduce safety risks and improve real-time analysis of formation gas.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen flame chromatograph, and particularly relates to a chromatograph hydrogen closed loop circulation control device and method. BACKGROUND

[0002] In oil exploration and development operations, real-time monitoring of formation gas is the core means to identify oil and gas shows. At present, the mainstream hydrogen flame chromatograph at home and abroad uses hydrogen flame ionization detection technology to quantitatively analyze hydrocarbon components in formation gas. The principle is to use high-temperature flame to burn separated hydrocarbons, and determine the oil and gas content by detecting ion current intensity. The device needs to supply hydrogen, air and sample gas (i.e. formation gas) at the same time to maintain the normal operation of the detection system.

[0003] To adapt to the needs of modern fast drilling operations, the fast analysis chromatograph uses a ten-way valve shunt technology to divide the sample gas into two paths and alternately transport it to the component identifier to achieve efficient continuous analysis. However, this design has a significant technical bottleneck: because heavy hydrocarbon components have strong adsorption, they are easily left in the ten-way valve, so after each analysis, back flushing must be performed. The existing gas path system is limited by the design architecture and can only use hydrogen as the back flushing medium. The hydrogen-containing waste gas after cleaning is directly discharged to the outside of the instrument. This operation not only significantly increases the consumption of hydrogen, but also, due to the flammable and explosive nature of hydrogen, it poses a major safety hazard in the discharge area. Once leakage occurs, it is easy to cause fire and explosion accidents.

[0004] Limited by safety standards, the hydrogen flame chromatograph must maintain a safety distance of at least 30 meters from the wellhead and cannot be deployed at key monitoring points such as the drilling fluid outlet. This limitation causes a time delay in formation gas analysis data, affecting the timeliness of exploration decisions; at the same time, being away from the monitoring source also weakens the response capability of the equipment to sudden abnormal situations, posing a potential threat to drilling safety. SUMMARY

[0005] The purpose of the present application is to provide a chromatograph hydrogen closed loop circulation control device and method, which can realize hydrogen reuse, reduce safety risks and improve the real-time analysis of formation gas to solve the problems of hydrogen waste, high safety risk and delayed data monitoring of the existing hydrogen flame chromatograph.

[0006] In order to achieve the above purpose, the present application provides the following technical solutions:

[0007] In a first aspect, the present application provides a chromatograph hydrogen closed loop circulation control device, comprising a chromatograph main body, wherein a ten-way valve, a multi-stage electromagnetic gas path control module, an integrated control module and a ten-way valve control module are fixedly installed inside the chromatograph main body.

[0008] The ten-way valve is fixedly connected with a gas path pipeline set and a multi-stage electromagnetic gas path control module, the gas path pipeline set includes a hydrogen pipeline and an air pipeline, the hydrogen pipeline introduces hydrogen into the multi-stage electromagnetic gas path control module, and the air pipeline introduces air into the multi-stage electromagnetic gas path control module and the ten-way valve; the ten-way valve is further connected with a component identifier;

[0009] The integrated control module is electrically connected with the multi-stage electromagnetic gas path control module and the ten-way valve control module, and is used for controlling the multi-stage electromagnetic gas path control module to switch the gas path and controlling the ten-way valve control module to adjust the working mode of the ten-way valve.

[0010] Further, the multi-stage electromagnetic gas path control module includes a first electromagnetic gas path control module, a second electromagnetic gas path control module, a third electromagnetic gas path control module and a fourth electromagnetic gas path control module.

[0011] The air inlet is further communicated with the air inlet of the third electromagnetic gas path control module.

[0012] The air inlet is further communicated with the air inlet of the third electromagnetic gas path control module.

[0013] Further, the air pipeline between the air inlet and the third electromagnetic gas path control module is sequentially provided with a pressure stabilizing valve and a flow valve; the air pipeline is branched into two branches after passing through the pressure stabilizing valve and the flow valve, one branch is communicated with the air inlet of the third electromagnetic gas path control module, and the other branch is communicated with the air inlet of the main column, and the air outlet of the main column is communicated with the ten-way valve.

[0014] Further, the air pipeline between the air inlet and the third electromagnetic gas path control module is sequentially provided with a pressure stabilizing valve and a flow valve; the air pipeline is branched into two branches after passing through the pressure stabilizing valve and the flow valve, one branch is communicated with the air inlet of the third electromagnetic gas path control module, and the other branch is communicated with the air inlet of the main column, and the air outlet of the main column is communicated with the ten-way valve.

[0015] Further, the ten-way valve is further provided with a waste gas vent, and the component identifier is further installed in the main body of the chromatograph and is fixedly installed between the third electromagnetic gas path control module and the air inlet of the main column.

[0016] Further, the first interface of the ten-way valve is connected with a total hydrocarbon sample gas input port and a sample inlet, and the second interface of the ten-way valve is connected with a sample gas venting port.

[0017] Further, a quantitative tube is connected between the third interface of the ten-way valve and the tenth interface of the ten-way valve, and a pre-cut column is connected between the fourth interface of the ten-way valve and the eighth interface of the ten-way valve.

[0018] In a second aspect, the present application further provides a chromatograph hydrogen closed-loop circulation control method, which uses the chromatograph hydrogen closed-loop circulation control device, and comprises the following steps:

[0019] The integrated control module reads preset working parameters, detects hydrogen source pressure, air source pressure, opening and closing states of electromagnetic valves in the multi-stage electromagnetic gas circuit control module, and a ten-way valve sensor signal, and confirms whether the device meets the safe starting condition;

[0020] After the device meets the safe starting condition, the integrated control module divides an analysis period into two equal time periods, time-sequences the gas circuit on-off states of the multi-stage electromagnetic gas circuit control module, and makes the multi-stage electromagnetic gas circuit control module switch between mode one and mode two.

[0021] Further, when the ten-way valve is in mode one, the integrated control module controls the gas circuit conduction between the first electromagnetic gas circuit control module and the second electromagnetic gas circuit control module, and the gas circuit conduction between the third electromagnetic gas circuit control module and the fourth electromagnetic gas circuit control module.

[0022] Meanwhile, the integrated control module controls the gas circuit closing between the first electromagnetic gas circuit control module and the fourth electromagnetic gas circuit control module, and the gas circuit closing between the third electromagnetic gas circuit control module and the second electromagnetic gas circuit control module.

[0023] Further, when the ten-way valve is in mode two, the integrated control module controls the gas circuit conduction between the first electromagnetic gas circuit control module and the fourth electromagnetic gas circuit control module, and the gas circuit conduction between the third electromagnetic gas circuit control module and the second electromagnetic gas circuit control module, and controls the gas circuit closing between the first electromagnetic gas circuit control module and the second electromagnetic gas circuit control module, and the gas circuit closing between the third electromagnetic gas circuit control module and the fourth electromagnetic gas circuit control module.

[0024] Compared with the prior art, the present application has the following beneficial technical effects:

[0025] The application provides a chromatograph hydrogen closed loop circulation control device, a multi-stage electromagnetic gas path control module and a ten-way valve control module are connected through electric signals by an integrated control module, a unified control center is constructed, gas path switching and ten-way valve working mode are realized, hydrogen can be recycled through directional transmission of the multi-stage electromagnetic gas path control module, waste caused by direct discharge of hydrogen in traditional technologies is avoided, hydrogen consumption and operation cost are reduced, air is supported to replace hydrogen as back flushing medium, air is transported to the ten-way valve through an air pipeline, fire and explosion safety hazards caused by hydrogen-containing waste gas discharge accumulation are completely eliminated, and equipment operation safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 It is a gas path schematic diagram of a chromatograph hydrogen closed loop circulation control device mode one in the embodiment of the application.

[0027] Fig. 2 It is a gas path schematic diagram of a chromatograph hydrogen closed loop circulation control device mode two in the embodiment of the application.

[0028] In the figure, 1 is a ten-way valve, 2 is a component identifier, 3 is an air inlet, 4 is a waste gas vent, 5 is a sample gas vent, 6 is a hydrogen inlet, 7 is a first electromagnetic gas path control module, 8 is a second electromagnetic gas path control module, 9 is a third electromagnetic gas path control module, 10 is a fourth electromagnetic gas path control module, 11 is a pressure stabilizing valve, 12 is a flow valve, 13 is a main column, 14 is a pre-cut column, 15 is a constant volume tube, 16 is a total hydrocarbon sample gas input port, 17 is a sample inlet, a is a first interface, b is a second interface, c is a third interface, d is a fourth interface, f is a sixth interface, h is an eighth interface, i is a ninth interface, and j is a tenth interface. DETAILED DESCRIPTION

[0029] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0030] In the description of the application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0033] The accompanying drawings illustrate various structural schematics according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0034] Example 1

[0035] This invention provides a closed-loop hydrogen circulation control device for a chromatograph. Through an innovative gas path control architecture and collaborative control mechanism, it effectively solves the problems of hydrogen waste, safety hazards, and data monitoring delays in existing equipment. The specific technical solution is as follows:

[0036] The system includes a chromatograph body, and the chromatograph body is internally fixedly equipped with a ten-way valve 1, a multi-stage electromagnetic gas path control module, an integrated control module, and a ten-way valve control module.

[0037] The ten-way valve 1 is fixedly connected to a gas pipeline group and a multi-stage electromagnetic gas circuit control module. The gas pipeline group includes a hydrogen pipeline and an air pipeline. The hydrogen pipeline introduces hydrogen into the multi-stage electromagnetic gas circuit control module, and the air pipeline introduces air into the multi-stage electromagnetic gas circuit control module and the ten-way valve 1. The ten-way valve 1 is also connected to a component identifier 2.

[0038] The integrated control module is electrically connected to the multi-stage electromagnetic pneumatic circuit control module and the ten-way valve control module. The integrated control module is used to control the multi-stage electromagnetic pneumatic circuit control module to switch the pneumatic circuit and to control the ten-way valve control module to adjust the working mode of the ten-way valve 1.

[0039] In this embodiment, the hydrogen introduced by the gas pipeline can be transmitted in a closed gas path composed of the multi-stage electromagnetic gas path control module and the ten-way valve 1. The integrated control module controls the multi-stage electromagnetic gas path control module to switch the gas path, so that the hydrogen does not need to be directly discharged after backflushing as in the prior art. Instead, it forms a circulating transmission path inside the device, avoiding the waste of hydrogen caused by the discharge after a single use, greatly reducing the amount of hydrogen consumed, and thus overcoming the shortcomings of the existing hydrogen flame chromatograph with large hydrogen waste.

[0040] In this embodiment, the integrated control module controls the multi-stage electromagnetic gas path control module to switch the backflushing cleaning gas source, replacing the traditional hydrogen backflushing with air backflushing: the air introduced by the gas path pipeline enters the multi-stage electromagnetic gas path control module along the pipeline, and under the regulation of the integrated control module, the air replaces hydrogen as the backflushing cleaning medium, avoiding the emission of hydrogen-containing waste gas to the outside of the instrument; thereby overcoming the safety hazard of hydrogen leakage and accumulation leading to fire and explosion in the existing technology that uses hydrogen as the backflushing medium and directly emits hydrogen-containing waste gas.

[0041] Example 2

[0042] See Figs. 1-2 The Fig. 1 and Fig. 2 The dashed lines represent disconnections, and the solid lines represent continuity. Based on Example 1, this example further describes the multi-stage electromagnetic pneumatic circuit control module:

[0043] In this embodiment, the multi-level electromagnetic pneumatic control module is modularly disassembled, including a first electromagnetic pneumatic control module 7, a second electromagnetic pneumatic control module 8, a third electromagnetic pneumatic control module 9, and a fourth electromagnetic pneumatic control module 10 connected sequentially through pneumatic pipelines.

[0044] The inlet of the first electromagnetic gas path control module 7 is connected to the hydrogen inlet 6, and the outlet of the first electromagnetic gas path control module 7 is connected to the inlet of the second electromagnetic gas path control module 8 and the fourth electromagnetic gas path control module 10 respectively.

[0045] The air inlet of the third electromagnetic air circuit control module 9 is connected to the second electromagnetic air circuit control module 8, and the air outlet of the third electromagnetic air circuit control module 9 is connected to the fourth electromagnetic air circuit control module 10; and the air inlet of the third electromagnetic air circuit control module 9 is also connected to an air inlet 3.

[0046] In a more preferred embodiment of the present invention, the outlet end of the second electromagnetic air circuit control module 8 is connected to the ninth interface i of the ten-way valve 1, and the outlet end of the fourth electromagnetic air circuit control module 10 is connected to the sixth interface f of the ten-way valve 1.

[0047] After the chromatograph gas path control device, which enables hydrogen circulation and simultaneous cleaning, is started:

[0048] Hydrogen transmission path: external hydrogen enters the first electromagnetic gas circuit control module 7 through the hydrogen inlet 6, the integrated control module sends instructions to the first electromagnetic gas circuit control module 7 through electrical signals, controls the first electromagnetic gas circuit control module 7 to selectively conduct the gas circuit with the second electromagnetic gas circuit control module 8 or the fourth electromagnetic gas circuit control module 10, adopts staggered transmission mode, and alternately transports hydrogen to the second electromagnetic gas circuit control module 8 or the fourth electromagnetic gas circuit control module 10, and then the second electromagnetic gas circuit control module 8 and the fourth electromagnetic gas circuit control module 10 transmit hydrogen to the ninth interface i of the ten-way valve 1 or the sixth interface f of the ten-way valve 1 according to real-time analysis requirements, so as to provide required fuel gas for hydrogen flame ionization detection.

[0049] Air transmission path: external air enters the third electromagnetic gas circuit control module 9 through the air inlet 3, the integrated control module sends instructions to the third electromagnetic gas circuit control module 9 synchronously, controls the first electromagnetic gas circuit control module 7 to selectively conduct the gas circuit with the second electromagnetic gas circuit control module 8 or the fourth electromagnetic gas circuit control module 10, adopts staggered transmission mode, and alternately transports air to the second electromagnetic gas circuit control module 8 or the fourth electromagnetic gas circuit control module 10, and then the second electromagnetic gas circuit control module 8 and the fourth electromagnetic gas circuit control module 10 transmit air to the ninth interface i of the ten-way valve 1 or the sixth interface f of the ten-way valve 1 according to real-time analysis requirements, so as to perform back flushing cleaning on residual heavy hydrocarbon components in the ten-way valve 1.

[0050] In a more preferred embodiment of the present application, a pressure stabilizing valve 11 and a flow valve 12 are sequentially arranged on an air pipeline between the air inlet 3 and the third electromagnetic gas circuit control module 9; the air pipeline is branched into two branches after passing through the pressure stabilizing valve 11 and the flow valve 12, one branch is in communication with the air inlet end of the third electromagnetic gas circuit control module 9, and the other branch is in communication with the air inlet end of a main column 13, and the air outlet end of the main column 13 is in communication with the ten-way valve 1. The pressure stabilizing valve 11 can stably adjust the pressure of external air entering from the air inlet 3, ensure that the pressure of each back flushing cleaning is consistent, and ensure the stability of the cleaning effect. The flow valve 12 can accurately control the air delivery flow. One branch of the air pipeline supplies air to the third electromagnetic gas circuit control module 9, and the other branch supplies air to the main column 13.

[0051] In a more preferred embodiment of the present application, the ten-way valve 1 is further provided with a waste gas vent 4, and a component identifier 2 is installed inside the chromatograph body and fixedly installed between the third electromagnetic gas path control module 9 and the air inlet end of the main column 13. In the operation of the chromatograph gas path control device capable of realizing hydrogen circulation and synchronous cleaning, air is delivered to the ninth interface i of the ten-way valve 1 through the third electromagnetic gas path control module 9 and the second electromagnetic gas path control module 8, or air is delivered to the sixth interface f of the ten-way valve 1 through the third electromagnetic gas path control module 9 and the fourth electromagnetic gas path control module 10, so as to perform back flushing cleaning on the residual heavy hydrocarbon components in the ten-way valve 1. After cleaning, the waste gas carrying the heavy hydrocarbon components needs to be promptly discharged from the gas path to avoid remaining in the gas path and polluting the cleaned channels again or mixing into the sample gas in the detection link. The waste gas vent 4 provides a discharge path for the waste gas carrying the heavy hydrocarbon components.

[0052] In a more preferred embodiment of the present application, the first interface a of the ten-way valve 1 is connected with a total hydrocarbon sample gas input port 16 and a sample inlet 17, and the second interface b of the ten-way valve 1 is connected with a sample gas vent 5. The sample gas vent 5 is used to realize safe discharge of redundant or unqualified sample gas.

[0053] In a more preferred embodiment of the present application, a constant volume tube 15 is connected between the third interface c of the ten-way valve 1 and the tenth interface j of the ten-way valve 1, and a pre-cut column 14 is connected between the fourth interface d of the ten-way valve 1 and the eighth interface h of the ten-way valve 1.

[0054] Embodiment 3

[0055] The present application also provides a chromatograph hydrogen closed loop circulation control method, which applies the chromatograph hydrogen closed loop circulation control device and includes the following steps:

[0056] The integrated control module reads the preset working parameters, detects the hydrogen source pressure, the air source pressure, the opening and closing state of the electromagnetic valves in the multi-stage electromagnetic gas path control module, and the ten-way valve 1 sensor signal, and confirms that the system meets the safe starting condition;

[0057] Based on the confirmed safe starting state, the integrated control module divides the analysis period into two equal time periods, and performs time sequence distribution on the gas path on-off state of the multi-stage electromagnetic gas path control module, so that the multi-stage electromagnetic gas path control module switches between mode one and mode two.

[0058] When the ten-way valve 1 is in mode one, the integrated control module controls the gas path conduction between the first electromagnetic gas path control module 7 and the second electromagnetic gas path control module 8 and the gas path conduction between the third electromagnetic gas path control module 9 and the fourth electromagnetic gas path control module 10.

[0059] Simultaneously control the air path between the first electromagnetic air path control module 7 and the fourth electromagnetic air path control module 10 to be closed, and the air path between the third electromagnetic air path control module 9 and the second electromagnetic air path control module 8 to be closed.

[0060] When the ten-way valve 1 is in mode two, the integrated control module controls the air path between the first electromagnetic air path control module 7 and the fourth electromagnetic air path control module 10 to be open, and the air path between the third electromagnetic air path control module 9 and the second electromagnetic air path control module 8 to be open, while controlling the air path between the first electromagnetic air path control module 7 and the second electromagnetic air path control module 8 to be closed, and the air path between the third electromagnetic air path control module 9 and the fourth electromagnetic air path control module 10 to be closed.

[0061] In a more specific embodiment of the present application, after the integrated control module is powered on, the preset working parameters are first read, including a hydrogen pressure range of 0.2 MPa, a hydrogen flow threshold of 120 ml / min, an air pressure range of 0.3 MPa, an air flow threshold of 200 ml / min, and a working mode switching period of 5-30 seconds.

[0062] The hydrogen source pressure, the air source pressure, the opening and closing state of the electromagnetic valves in the multi-stage electromagnetic air path control module, and the ten-way valve 1 sensor signal are detected to confirm whether the device meets the safe starting conditions; after the device meets the safe starting conditions, the device enters a detection preparation state.

[0063] The air enters the device through the air inlet 3, and then flows through the pressure stabilizing valve 11 and the flow valve 12 in sequence; the air is divided into two branches: one branch enters the third electromagnetic air path control module 9 to reserve the gas source for the backwashing cleaning link; the other branch enters the main column 13 to provide necessary conditions for the subsequent separation of sample gas.

[0064] The hydrogen enters the first electromagnetic air path control module 7 through the hydrogen inlet 6; the first electromagnetic air path control module 7 is in a standby switching state under the instruction of the integrated control module, and is ready to deliver hydrogen to the corresponding module according to the working mode of the ten-way valve 1 to reserve the fuel gas for hydrogen flame ionization detection.

[0065] The formation gas sample that needs to be detected for total hydrocarbon content is connected through the total hydrocarbon sample gas input port 16, and the formation gas sample that needs to be analyzed for specific hydrocarbon components is connected through the sample inlet 17; both the formation gas sample with total hydrocarbon content and the formation gas sample that needs to be analyzed for specific hydrocarbon components enter the interior of the ten-way valve 1 through the first interface a of the ten-way valve 1.

[0066] The two kinds of sample gas are transported to the main column 13, and the main column 13 separates the components of the two kinds of sample gas, separates different kinds of hydrocarbon substances one by one, and obtains the separated sample gas components; the separated sample gas components enter the ten-way valve 1 and wait to enter the detection link.

[0067] The integrated control module divides the analysis period into two equal time periods, controls the ten-way valve 1 to switch to mode 1 and mode 2 alternately, and realizes the synchronization of detection and cleaning:

[0068] In this embodiment, mode 1 is running: the integrated control module controls the first electromagnetic gas circuit control module 7 and the second electromagnetic gas circuit control module 8 to be turned on, hydrogen is transported to the ninth interface i of the ten-way valve 1 through the first electromagnetic gas circuit control module 7 and the second electromagnetic gas circuit control module 8, and forms a detection environment with the separated sample gas components in the ten-way valve 1; then the separated sample gas components and hydrogen enter the component identifier 2 together; the component identifier 2 detects the ion flow intensity by hydrogen flame ionization technology, determines the content of the hydrocarbon components in the two sample gases, and completes the detection data acquisition. At the same time, the integrated control module controls the third electromagnetic gas circuit control module 9 and the fourth electromagnetic gas circuit control module 10 to be turned on, air is transported to the sixth interface f of the ten-way valve 1 through the path, and the air performs back flushing cleaning on the heavy hydrocarbon components remaining in the ten-way valve 1. The waste gas carrying the heavy hydrocarbon components after cleaning needs to be separated from the gas circuit in time to avoid remaining in the gas circuit and polluting the cleaned channel again or mixing into the sample gas in the detection link, so as to avoid the interference of the residual components on the subsequent detection, and the waste gas carrying the heavy hydrocarbon components is discharged from the waste gas vent 4.

[0069] Mode 2 is running: the integrated control module controls the gas circuit switching, the first electromagnetic gas circuit control module 7 and the fourth electromagnetic gas circuit control module 10 are turned on, hydrogen is transported to the sixth interface f of the ten-way valve 1, combined with the separated sample gas components, and enters the component identifier 2 to complete a new round of detection data acquisition; at the same time, the third electromagnetic gas circuit control module 9 and the second electromagnetic gas circuit control module 8 are turned on, air is transported to the ninth interface i of the ten-way valve 1, and the air performs back flushing cleaning on the heavy hydrocarbon components remaining in the ten-way valve 1. The waste gas carrying the heavy hydrocarbon components after cleaning needs to be separated from the gas circuit in time to avoid remaining in the gas circuit and polluting the cleaned channel again or mixing into the sample gas in the detection link, so as to avoid the interference of the residual components on the subsequent detection, and the waste gas carrying the heavy hydrocarbon components is discharged from the waste gas vent 4.

[0070] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A hydrogen closed-loop circulation control device for a chromatograph, characterized in that, The chromatograph includes a main body, and a ten-way valve (1), a multi-stage electromagnetic gas path control module, an integrated control module and a ten-way valve control module are fixedly installed inside the main body. The ten-way valve (1) is fixedly connected to the gas pipeline group and the multi-stage electromagnetic gas circuit control module. The gas pipeline group includes a hydrogen pipeline and an air pipeline. The hydrogen pipeline introduces hydrogen into the multi-stage electromagnetic gas circuit control module, and the air pipeline introduces air into the multi-stage electromagnetic gas circuit control module and the ten-way valve (1). The ten-way valve (1) is also connected to a component identifier (2). The integrated control module is electrically connected to the multi-stage electromagnetic gas path control module and the control module for the ten-way valve. The integrated control module is used to control the multi-stage electromagnetic gas path control module to switch the gas path and to control the ten-way valve control module to adjust the working mode of the ten-way valve (1). The multi-level electromagnetic air circuit control module includes a first electromagnetic air circuit control module (7), a second electromagnetic air circuit control module (8), a third electromagnetic air circuit control module (9), and a fourth electromagnetic air circuit control module (10). The first electromagnetic gas path control module (7) has a hydrogen inlet (6) connected to its inlet end, and the first electromagnetic gas path control module (7) has an outlet end connected to the inlet end of the second electromagnetic gas path control module (8) and the fourth electromagnetic gas path control module (10). The air inlet of the third electromagnetic air circuit control module (9) is connected to the second electromagnetic air circuit control module (8), and the air outlet of the third electromagnetic air circuit control module (9) is connected to the fourth electromagnetic air circuit control module (10); and the air inlet of the third electromagnetic air circuit control module (9) is also connected to an air inlet (3). Under the control of the integrated control module, the first electromagnetic gas path control module (7) supplies hydrogen to the second electromagnetic gas path control module (8) and the fourth electromagnetic gas path control module (10) in a staggered manner, and the third electromagnetic gas path control module (9) supplies air to the second electromagnetic gas path control module (8) and the fourth electromagnetic gas path control module (10) in a staggered manner. A pressure regulating valve (11) and a flow valve (12) are sequentially installed on the air pipeline between the air inlet (3) and the third electromagnetic air circuit control module (9). After passing through the pressure regulating valve (11) and the flow valve (12), the air pipeline splits into two branches. One branch is connected to the air inlet of the third electromagnetic air circuit control module (9), and the other branch is connected to the air inlet of the main column (13). The air outlet of the main column (13) is connected to the ten-way valve (1).

2. The hydrogen closed-loop circulation control device for a chromatograph according to claim 1, characterized in that, The outlet of the second electromagnetic air circuit control module (8) is connected to the ninth interface (i) of the ten-way valve (1), and the outlet of the fourth electromagnetic air circuit control module (10) is connected to the sixth interface (f) of the ten-way valve (1).

3. The hydrogen closed-loop circulation control device for a chromatograph according to claim 2, characterized in that, The ten-way valve (1) is also provided with a waste gas vent (4), and the chromatograph body is also equipped with a component identifier (2), which is fixedly installed between the third electromagnetic gas path control module (9) and the gas inlet of the main column (13).

4. The hydrogen closed-loop circulation control device for a chromatograph according to claim 3, characterized in that, The first port (a) of the ten-way valve (1) is connected to the total hydrocarbon sample gas inlet (16) and the sample inlet (17), and the second port (b) of the ten-way valve (1) is connected to the sample gas vent (5).

5. The hydrogen closed-loop circulation control device for a chromatograph according to claim 4, characterized in that, A metering tube (15) is connected between the third port c and the tenth port (j) of the ten-way valve (1), and a pre-cutting column (14) is connected between the fourth port (d) and the eighth port (h) of the ten-way valve (1).

6. A method for closed-loop control of hydrogen gas circulation in a chromatograph, characterized in that, The application of the hydrogen closed-loop circulation control device for a chromatograph according to any one of claims 1-5 includes the following steps: The preset working parameters are read by the integrated control module, and the opening and closing status of the solenoid valve in the multi-stage electromagnetic gas circuit control module and the sensor signal of the ten-way valve (1) are detected to confirm whether the device meets the safe start-up conditions. After the device meets the safe start-up conditions, the integrated control module divides the analysis period into two equal time periods and allocates the on / off state of the gas path of the multi-level electromagnetic gas path control module in a time sequence, so that the multi-level electromagnetic gas path control module switches between mode one and mode two. When the ten-way valve (1) is in mode one, the integrated control module controls the air circuit connection between the first electromagnetic air circuit control module (7) and the second electromagnetic air circuit control module (8), and the air circuit connection between the third electromagnetic air circuit control module (9) and the fourth electromagnetic air circuit control module (10). Simultaneously control the closure of the gas path between the first electromagnetic gas path control module (7) and the fourth electromagnetic gas path control module (10), and the closure of the gas path between the third electromagnetic gas path control module (9) and the second electromagnetic gas path control module (8); When the ten-way valve (1) is in mode two, the integrated control module controls the air passage between the first electromagnetic air passage control module (7) and the fourth electromagnetic air passage control module (10) to be open, and the air passage between the third electromagnetic air passage control module (9) and the second electromagnetic air passage control module (8) to be open. At the same time, it controls the air passage between the first electromagnetic air passage control module (7) and the second electromagnetic air passage control module (8) to be closed, and the air passage between the third electromagnetic air passage control module (9) and the fourth electromagnetic air passage control module (10) to be closed.

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