Gaseous pollutant control instrument

Abstract

The invention relates to air monitoring equipment, in particular to a gaseous pollutant control instrument which comprises a control unit, a gas distributor, a first gas inlet pipe, a waste gas collecting pipe, a sampling header pipe, at least one second gas inlet pipe, at least one third gas inlet pipe, at least one switch valve and at least one gaseous monitor. One end of the first gas inlet pipe is connected with the gas distributor, the other end of the first gas inlet pipe is connected with the waste gas collecting pipe, one end of the second gas inlet pipe is connected with the sampling header pipe, the other end of the second gas inlet pipe is connected with the gas state monitoring instrument, one end of the third gas inlet pipe is connected with the first gas inlet pipe, and the other end of the third gas inlet pipe is connected with the gas state monitoring instrument. The switch valve is arranged on the third gas inlet pipe, the control unit is connected with the gas distribution instrument and the switch valve, the control unit controls the gas distribution instrument to be turned on or turned off, and the control unit controls the switch valve to be turned on or turned off. According to the invention, automatic control of various operation and maintenance functions such as quality control and calibration of the analyzer can be realized.

Description

Technical Field

[0001] The invention relates to an air monitoring device, in particular to a gaseous pollutant control instrument. Background Art

[0002] In the existing operating mode of the ambient air quality monitoring network, when the gas monitor needs to be calibrated (by introducing standard gas into the gas monitor to quantitatively calibrate the equipment), the operation and maintenance personnel are required to manually operate the multi-gas dynamic calibrator, i.e., the gas distributor, input concentration points of different concentrations, and manually calculate the error based on the instrument response to determine whether it is qualified. If the deviation exceeds the standard range, the equipment needs to be manually calibrated. When different gas monitors need to be calibrated, the pipelines also need to be switched manually. During the operation of the gas monitor, the operation and maintenance personnel have a large workload, cumbersome operations, and are prone to errors that lead to inaccurate monitoring results, and cannot achieve timed quality control and remote quality control. Summary of the invention

[0003] The object of the present invention is to provide a gaseous pollutant control instrument which can realize automatic control of various operation and maintenance functions such as quality control and calibration of the analyzer.

[0004] To achieve the above-mentioned purpose, the present invention provides a gaseous pollutant control instrument, including a control unit, a gas distribution instrument, a first air intake pipe, an exhaust gas collecting pipe, a sampling main pipe, at least one second air intake pipe, at least one third air intake pipe, at least one switch valve, and at least one gaseous monitor. The second air intake pipe, the third air intake pipe, the switch valve, and the gaseous monitor correspond to each other. One end of the first air intake pipe is connected to the gas distribution instrument, and the other end is connected to the exhaust gas collecting pipe. One end of the second air intake pipe is connected to the sampling main pipe, and the other end is connected to the gaseous monitor. One end of the third air intake pipe is connected to the first air intake pipe, and the other end is connected to the gaseous detector. The switch valve is arranged on the third air intake pipe. The control unit is connected to the gas distribution instrument and the switch valve. The control unit controls the gas distribution instrument to be turned on or off, and the control unit controls the switch valve to be turned on or off.

[0005] Furthermore, a pressure sensor is provided on the first air intake pipe, and the pressure sensor is connected to the control unit. The control unit controls the air supply pressure of the gas distribution instrument according to the pressure information transmitted by the pressure sensor.

[0006] Furthermore, a flow meter is provided on the first air inlet pipe, and the flow meter is connected to the control unit. The control unit controls the air supply flow of the gas distributor according to the flow information transmitted by the flow meter.

[0007] Furthermore, an exhaust fan is provided at the end of the sampling main pipe.

[0008] Furthermore, one end of the second intake pipe connected to the gas detector is connected to the third intake pipe, and is connected to the gas detector through the third intake pipe. The switch valve is arranged upstream of the connection point between the second intake pipe and the third intake pipe.

[0009] Furthermore, a one-way valve is provided on the second air intake pipe.

[0010] Furthermore, a gas filtering device is provided upstream of the gas detector.

[0011] The gaseous pollutant control instrument of the present invention has at least the following beneficial effects:

[0012] The present invention provides a gaseous pollutant material controller, which includes a control unit, a gas distributor, and a third air inlet pipe. The third air inlet pipe is connected between the first air inlet pipe and the gas detector. A switch valve is arranged on the third air inlet pipe. The control unit is connected to the gas distributor and the switch valves. Therefore, the opening and closing of the gas distributor can be controlled by the control unit. The control unit controls the opening and closing of the switch valves to realize the sampling of the sampling pipeline and the standard gas pipeline or the switching of different standard gases, thereby realizing automatic control of various operation and maintenance functions such as quality control and calibration of the analyzer, improving the automation degree of the gaseous pollutant material controller of the present invention, improving the calibration accuracy, and realizing timed automatic quality control and remote quality control functions through setting.

[0013] The gaseous pollutant control instrument of the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the gaseous pollutant control instrument of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the gaseous pollutant control instrument of the present invention in the replacement state;

[0016] Figure 3 It is a structural schematic diagram of the gaseous pollutant control instrument of the present invention in the quality control state;

[0017] Figure 4 It is a schematic diagram of the structure of the gaseous pollutant control instrument of the present invention in the sampling state. DETAILED DESCRIPTION

[0018] like Figure 1As shown, a gaseous pollutant control instrument of the present invention includes a control unit, a gas distribution instrument 10, a first air intake pipe 11, an exhaust gas collection pipe 12, a sampling main pipe 20, one or more second air intake pipes 21, one or more third air intake pipes 22, one or more switch valves 23, and one or more gas monitors 24. The control unit is an industrial computer. The second air intake pipe 21, the third air intake pipe 22, the switch valve 23, and the gas monitor 24 correspond to each other. In this embodiment, the second air intake pipe 21, the third air intake pipe 22, the switch valve 23, and the gas monitor 24 are all provided with four. The first air intake pipe 11 It is a quality control pipeline, one end of the first air inlet pipe 11 is connected to the gas distributor 10, and the other end is connected to the exhaust gas collection pipe 12. The second air inlet pipe 21 is a sampling pipeline, one end of the second air inlet pipe 21 is connected to the sampling main pipe 20, and the other end is connected to the gas state monitor 24. The third air inlet pipe 22 is a calibration gas circuit, one end of the third air inlet pipe 22 is connected to the first air inlet pipe 11, and the other end is connected to the gas state detector 24. The switch valve 23 is arranged on the third air inlet pipe 22, and the control unit is connected to the gas distributor 10 and the switch valve 23. The control unit controls the gas distributor 10 to open or close, and the control unit controls the switch valve 23 to open or close.

[0019] like Figure 2 , Figure 3 , Figure 4 As shown, the working process of a gaseous pollutant control instrument of the present invention is as follows:

[0020] Replacement state: To ensure that the duration of quality control of the gas monitor is controlled within 15 minutes to ensure the validity of the hourly data, start the gas distributor 10 in advance before calibration to introduce standard gas or zero gas into the entire pipeline. The four switch valves 23 are all in a closed state through the control unit. The control unit controls the gas distributor 10 to open, and introduce standard gas or zero gas into the first air inlet pipe 11. Standard gas is standard gas. The gas detector 24 is calibrated by introducing standard gas of different concentrations. Zero gas is clean air, which is used for zero point calibration. The standard gas or zero gas passes through the first air inlet pipe 11 and is discharged through the exhaust gas collection pipe 12, so that the first air inlet pipe 11 is filled with standard gas or zero gas. The first air inlet pipe 11 is the quality control instrument tube. At this time, the gas detector 24 is normally opened, and the air sample in the sampling main pipe 20 is extracted. The air sample enters the gas detector 24 through the second air inlet pipe 21 to ensure the validity of the hourly data.

[0021] Quality control state: After the replacement state is completed, the quality control state is turned on. The quality control state is to introduce standard gas or zero gas into the equipment and formally enter the calibration procedure. At this time, the control unit controls the gas distributor 10 to normally input standard gas or zero gas into the first air inlet pipe 11, and the control unit controls the corresponding switch valve 23 to open, and calibrates the gas detector 24 of a certain channel to open the corresponding switch valve 23, and the other three channels are still in the sampling state;

[0022] Sampling state: After the quality control state is calibrated, the control unit controls the gas distributor 10 to close, the switch valves 23 of each route are closed, and the quality control instrument switches back to the sampling state, that is, each gas detector 24 normally collects and analyzes the air sample in the sampling main pipe 20.

[0023] The present invention provides a gaseous pollutant material controller, which includes a control unit, a gas distributor 10, and a third air inlet pipe 22. The third air inlet pipe 22 is connected between the first air inlet pipe 11 and the gas detector 24. A switch valve 23 is arranged on the third air inlet pipe 22. The control unit is connected to the gas distributor 10 and the switch valves 23. Therefore, the opening and closing of the gas distributor 10 can be controlled by the control unit. The control unit controls the opening and closing of the switch valves 10 to realize the sampling pipeline, the standard gas pipeline sampling or the switching of different standard gases, and realizes the automatic control of various operation and maintenance functions such as quality control and calibration of the analyzer, thereby improving the automation degree of the gaseous pollutant material controller of the present invention and the calibration accuracy. It can also realize the timed automatic quality control and remote quality control functions through setting.

[0024] Optionally, a pressure sensor 13 is provided on the first air inlet pipe 11, and the pressure sensor 13 is connected to the control unit. The control unit controls the pressure of the standard gas or zero gas entering the first air inlet pipe 11 of the gas distributor 10 according to the pressure information transmitted by the pressure sensor 13, thereby ensuring the pressure stability when the standard gas or zero gas is input.

[0025] Optionally, a flow meter 14 is provided on the first air inlet pipe 11, and the flow meter 14 is connected to a control unit. The control unit controls the flow of standard gas or zero gas entering the first air inlet pipe 11 from the gas distributor 10 according to the flow information transmitted by the flow meter 14, to ensure that the flow is stable when the standard gas or zero gas is input. In addition, the standard gas or zero gas passes through the gas distributor 10 before being input into the instrument for calibration. The flow read in the quality control instrument is compared with the flow in the gas distributor 10 in real time, and the flow of the standard gas or zero gas input is calibrated, so as to timely discover and solve problems such as flow fluctuations or gas leakage in the pipeline.

[0026] Optionally, an exhaust fan 26 is provided at the end of the sampling main pipe 20. An exhaust fan 26 is provided at the end of the sampling main pipe, and air samples enter from the sampling port 201 of the sampling main pipe 20 and are extracted from the exhaust fan port at the end. The sampling main pipe 20 is in a negative pressure state, and an exhaust pump is installed in the gas state monitor device. The gas pressure of the standard gas or zero gas input by the gas distributor 10 is greater than the negative pressure generated by the exhaust pump in the gas state monitor device, thereby avoiding the possibility that the gas state monitor draws part of the air sample in the sampling main pipe 20 into the third air inlet pipe 22, thereby ensuring the stability and accuracy of the standard gas or zero gas input.

[0027] Optionally, one end of the second intake pipe 21 connected to the gas detector 24 is connected to the third intake pipe 22, and is connected to the gas detector 24 through the third intake pipe 22. The switch valve 23 is arranged upstream of the connection point between the second intake pipe 21 and the third intake pipe 22.

[0028] Optionally, a one-way valve 27 is provided on the second air inlet pipe 21 to effectively block the standard gas or zero gas from entering the gas path of the sampling main pipe 20, thereby preventing part of the standard gas or zero gas from being drawn away by the sampling main pipe 20 when the standard gas or zero gas is introduced, thereby affecting the calibration accuracy.

[0029] Optionally, a gas filtering device is provided upstream of the gas detector 24 . Specifically, the gas filtering device is a filter membrane 25 . The gas sample in the sampling main pipe 20 enters the gas detector 24 after being filtered by the filter membrane 25 .

[0030] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A gaseous pollutant control instrument, characterized in that: The invention comprises a control unit, a gas distribution device (10), a first air intake pipe (11), an exhaust gas collection pipe (12), a sampling main pipe (20), at least one second air intake pipe (21), at least one third air intake pipe (22), at least one switch valve (23), and at least one gas state monitor (24); the second air intake pipe (21), the third air intake pipe (22), the switch valve (23), and the gas state monitor (24) correspond to each other; one end of the first air intake pipe (11) is connected to the gas distribution device (10), and the other end is connected to the exhaust gas collection pipe (12). One end of the second air intake pipe (21) is connected to the sampling main pipe (20), and the other end is connected to the gas state monitor (24); one end of the third air intake pipe (22) is connected to the first air intake pipe (11), and the other end is connected to the gas state detector (24); the switch valve (23) is arranged on the third air intake pipe (22); the control unit is connected to the gas distribution instrument (10) and the switch valve (23); the control unit controls the gas distribution instrument (10) to be opened or closed; and the control unit controls the switch valve (23) to be opened or closed.

2. The gaseous pollutant control instrument according to claim 1, characterized in that: The first air intake pipe (11) is provided with a pressure sensor (13), the pressure sensor (13) is connected to the control unit, and the control unit controls the air supply pressure of the gas distribution device (10) according to the pressure information transmitted by the pressure sensor (13).

3. The gaseous pollutant control instrument according to claim 1, characterized in that: The first air inlet pipe (11) is provided with a flow meter (14), the flow meter (14) is connected to the control unit, and the control unit controls the air supply flow of the gas distribution device (10) according to the flow information transmitted by the flow meter (14).

4. The gaseous pollutant control instrument according to claim 1, characterized in that: An exhaust fan (26) is provided at the end of the sampling main pipe (20).

5. The gaseous pollutant control instrument according to claim 1, characterized in that: One end of the second air intake pipe (21) connected to the gas detector (24) is connected to the third air intake pipe (22), and is connected to the gas detector (24) via the third air intake pipe (22). The switch valve (23) is arranged upstream of the connection point between the second air intake pipe (21) and the third air intake pipe (22).

6. The gaseous pollutant control instrument according to claim 5, characterized in that: The second air inlet pipe (21) is provided with a one-way valve (27).

7. The gaseous pollutant control instrument according to any one of claims 1 to 6, characterized in that: A gas filtering device is provided upstream of the gas state detector (24).

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