Natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function

Abstract

The utility model provides a natural gas ultraviolet hydrogen sulfide analysis system with an automatic calibration function, which relates to the field of hydrogen sulfide analysis and comprises an upper computer, a control unit, a communication module, a gas storage unit, a measuring unit and a gas tank, the control unit is electrically connected with the upper computer, the communication module and the measuring unit; the gas storage unit is connected with the gas pool through a pipeline; and the measuring unit is arranged in the pipeline between the gas storage unit and the gas pool. The analysis unit disclosed by the utility model is used for measuring and analyzing hydrogen sulfide through the ultraviolet spectrum plate and the spectrograph, and consumables do not need to be replaced. The control unit, the gas storage unit and the measuring unit are controlled through the upper computer, regular automatic calibration can be achieved, manual guarding is not needed, and the influence of manual operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen sulfide analysis field especially, relate to a kind of natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function. BACKGROUND

[0002] Natural gas ultraviolet hydrogen sulfide analyzer is mainly used to detect hydrogen sulfide content in natural gas. It is applied to the explosion-proof occasion corresponding to the explosion-proof grade requirement using the explosion-proof structure, and the analyzer has the function of automatic calibration at regular intervals, but the existing natural gas ultraviolet hydrogen sulfide analyzer still has the following problems: 1. Lead acetate paper principle is used to measure H2S, and the paper tape needs to be replaced regularly. 2. Lead acetate paper tape or other principle analyzer needs to be calibrated manually regularly. INVENTION CONTENT

[0003] Therefore, the utility model aims at providing a natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function, which solves the technical problems that the existing natural gas ultraviolet hydrogen sulfide analyzer needs to replace the paper tape regularly when using lead acetate paper principle to measure H2S, and the lead acetate paper tape or other principle analyzer needs to be calibrated manually regularly.

[0004] The utility model provides a natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function, which comprises:

[0005] Host computer, control unit, communication module, gas storage unit, measurement unit and gas cell;

[0006] The control unit is electrically connected with the host computer, the communication module and the measurement unit;

[0007] The gas storage unit and the gas cell are connected by a pipeline;

[0008] The measurement unit is placed inside the pipeline between the gas storage unit and the gas cell.

[0009] Preferably,

[0010] The control unit comprises a mainboard, an analysis unit, an interface board and a three-way relay;

[0011] The mainboard is electrically connected with the communication module, the host computer, the interface board and the analysis unit, and the interface board is electrically connected with the three-way relay.

[0012] Preferably,

[0013] The analysis unit comprises an ultraviolet spectrum plate, a spectrometer, a solid-state relay and a xenon lamp;

[0014] The mainboard is electrically connected with the ultraviolet spectrum plate, the ultraviolet spectrum plate is electrically connected with the spectrometer and the solid-state relay, and the spectrometer is electrically connected with the xenon lamp;

[0015] The gas cell is connected with the spectrometer and the xenon lamp fiber, and the gas cell is connected with the solid-state relay.

[0016] Preferably,

[0017] The gas storage unit comprises a sample gas storage unit, a zero point gas storage unit, a range gas storage unit, a three-way electromagnetic valve V1, a three-way electromagnetic valve V2 and a buffer;

[0018] The output end of the three-way electromagnetic valve V2 is connected with the normally closed end of the three-way electromagnetic valve V1, and the output end of the three-way electromagnetic valve V1 is connected with the buffer pipeline.

[0019] The mainboard is connected with the three-way electromagnetic valve V1 and the three-way electromagnetic valve V2.

[0020] Preferably,

[0021] The sample gas storage unit is connected with the normally open end of the three-way electromagnetic valve V1.

[0022] Preferably,

[0023] The zero point gas storage unit is connected with the normally open end of the three-way electromagnetic valve V2.

[0024] Preferably,

[0025] The range gas storage unit is connected with the normally closed end of the three-way electromagnetic valve V2.

[0026] Preferably,

[0027] The measurement unit comprises a pressure sensor and a flow sensor.

[0028] The mainboard is connected with the pressure sensor and the flow sensor.

[0029] The utility model has the following beneficial effects:

[0030] The analysis unit measures and analyzes hydrogen sulfide through the ultraviolet spectrum plate and the spectrometer, and does not need to replace consumables. The control unit, the gas storage unit and the measurement unit are controlled by the upper computer, regular automatic calibration can be realized, manual attendance is not needed, and human operation influence is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is electrical schematic diagram of natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function;

[0032] Figure 2 It is pipeline connection drawing of gas storage unit and gas cell;

[0033] The realization, functional characteristics and advantages of the utility model will be further explained by combining with embodiments and referring to the drawings. DETAILED DESCRIPTION

[0034] It should be understood that the specific embodiments described herein are merely exemplary and are not intended to limit the present application.

[0035] With reference to Figures 1-2 The present application provides a natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function, comprising:

[0036] The host computer, the control unit, the communication module, the gas storage unit, the measurement unit and the gas cell;

[0037] The control unit is electrically connected with the host computer, the communication module and the measurement unit;

[0038] The gas storage unit and the gas cell are connected through a pipeline;

[0039] The measurement unit is placed inside the pipeline between the gas storage unit and the gas cell.

[0040] As an embodiment:

[0041] The control unit comprises a mainboard, an analysis unit, an interface board and a three-way relay;

[0042] The mainboard is electrically connected with the communication module, the host computer, the interface board and the analysis unit, and the interface board is electrically connected with the three-way relay.

[0043] Specifically, the control unit is installed in the cabinet in an explosion-proof manner, and the analysis data and the equipment state are displayed through the display screen. The mainboard is connected with the communication module through a communication interface, and the communication module comprises RS-485 communication, RS-232 communication and other communication. The system can be operated manually on site or controlled automatically or remotely.

[0044] As an embodiment:

[0045] The analysis unit comprises an ultraviolet spectrum plate, a spectrometer, a solid-state relay and a xenon lamp;

[0046] The mainboard is electrically connected with the ultraviolet spectrum plate, the ultraviolet spectrum plate is electrically connected with the spectrometer and the solid-state relay, and the spectrometer is electrically connected with the xenon lamp;

[0047] The gas cell is connected with the spectrometer and the xenon lamp through an optical fiber, and is electrically connected with the solid-state relay.

[0048] Specifically, the analysis unit measures the hydrogen sulfide content in natural gas by ultraviolet spectroscopy. The sampling pipeline automatically samples and analyzes the data. When manually controlling zero point calibration or range point calibration, the zero point gas or range point gas enters the analysis unit through the corresponding pipeline, and the calibration data is manually confirmed. When automatically calibrating, the zero point or range point calibration cycle is automatically switched and the calibration data is confirmed. The sample gas and standard gas are switched, and the zero point gas and range gas are switched by two three-way electromagnetic valves. The three-way electromagnetic valves are controlled by the mainboard. When automatically calibrating, the calibration cycle, calibration time, calibration concentration, and other related parameters are input to the mainboard through the upper computer, and the mainboard automatically executes the calibration function according to the program. The automatic calibration function can also be turned on or off through the upper computer. When automatically calibrating, the data is output with corresponding flags to distinguish between sampling and calibration. When automatically calibrating, the flow is judged. When the standard gas flow is less than the set flow, the automatic calibration is not executed. It may be that the standard gas is not enough or other reasons that the automatic calibration will affect the calibration result, and a prompt is given to the local and external data transmission.

[0049] Reference Figure 2 As an embodiment:

[0050] The gas storage unit includes a sample gas storage unit, a zero point gas storage unit, a range gas storage unit, a three-way electromagnetic valve V1, a three-way electromagnetic valve V2, and a buffer.

[0051] The output end of the three-way electromagnetic valve V2 is connected to the normally closed end of the three-way electromagnetic valve V1, and the output end of the three-way electromagnetic valve V1 is connected to the buffer pipeline.

[0052] The mainboard is electrically connected to the three-way electromagnetic valve V1 and the three-way electromagnetic valve V2.

[0053] As an embodiment:

[0054] The sample gas storage unit is connected to the normally open end of the three-way electromagnetic valve V1.

[0055] Specifically, sampling: the sample gas passes through the normally open end of the three-way electromagnetic valve V1 to the buffer, pressure sensor, flow sensor, and gas cell, and is finally discharged.

[0056] As an embodiment:

[0057] The zero point gas storage unit is connected to the normally open end of the three-way electromagnetic valve V2.

[0058] Specifically, zero point calibration: the zero point gas passes through the normally open end of the three-way electromagnetic valve V2 to the normally closed end of the three-way electromagnetic valve to the buffer, pressure sensor, flow sensor, and gas cell, and is finally discharged.

[0059] As an embodiment:

[0060] The range gas storage unit is connected with the normally closed end of the three-way electromagnetic valve V2 through a pipeline.

[0061] Specifically, the range point calibration: the range gas is discharged through the normally closed end of the three-way electromagnetic valve V2 to the normally closed end of the three-way electromagnetic valve, the buffer, the pressure sensor, the flow sensor, and the gas pool.

[0062] As an embodiment:

[0063] The measurement unit comprises a pressure sensor and a flow sensor.

[0064] The mainboard is electrically connected with the pressure sensor and the flow sensor.

[0065] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such a process, method, article or system. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or system including the element.

[0066] The above-mentioned embodiment serial numbers of the utility model are only for description, and do not represent the advantages and disadvantages of the embodiments. In the unit claims of several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third does not represent any order, and these words can be interpreted as identifiers.

[0067] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model. Any equivalent structure or equivalent process transformation using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function, characterized in that, The system comprises: a host computer, a control unit, a communication module, a gas storage unit, a measurement unit and a gas cell; the control unit is electrically connected with the host computer, the communication module and the measurement unit; the gas storage unit is connected with the gas cell through a pipeline; the measurement unit is placed inside the pipeline between the gas storage unit and the gas cell.

2. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 1, wherein: the control unit comprises a mainboard, an analysis unit, an interface board and a three-way relay; the mainboard is electrically connected with the communication module, the host computer, the interface board and the analysis unit, and the interface board is electrically connected with the three-way relay.

3. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 2, wherein: the analysis unit comprises an ultraviolet spectrum board, a spectrometer, a solid-state relay and a xenon lamp; the mainboard is electrically connected with the ultraviolet spectrum board, the ultraviolet spectrum board is electrically connected with the spectrometer and the solid-state relay, and the spectrometer is electrically connected with the xenon lamp; the gas cell is connected with the spectrometer and the xenon lamp through optical fibers, and is electrically connected with the solid-state relay.

4. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 2, wherein: the gas storage unit comprises a sample gas storage unit, a zero-point gas storage unit, a range gas storage unit, a three-way electromagnetic valve V1, a three-way electromagnetic valve V2 and a buffer; an output end of the three-way electromagnetic valve V2 is connected with a normally closed end of the three-way electromagnetic valve V1 through a pipeline, and an output end of the three-way electromagnetic valve V1 is connected with the buffer through a pipeline; the mainboard is electrically connected with the three-way electromagnetic valve V1 and the three-way electromagnetic valve V2.

5. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 4, wherein: the sample gas storage unit is connected with a normally open end of the three-way electromagnetic valve V1 through a pipeline.

6. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 4, wherein: the zero-point gas storage unit is connected with a normally open end of the three-way electromagnetic valve V2 through a pipeline.

7. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 4, wherein: the range gas storage unit is connected with a normally closed end of the three-way electromagnetic valve V2 through a pipeline.

8. The natural gas ultraviolet hydrogen sulfide analysis system with automatic calibration function according to claim 4, wherein: the measurement unit comprises a pressure sensor and a flow sensor; the mainboard is electrically connected with the pressure sensor and the flow sensor.

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