Volatile organic compound on-line monitoring system

Abstract

The utility model provides an on-line monitoring system for volatile organic compounds. The on-line monitoring system comprises a shell and a cleaning unit for cleaning the interior of the shell, the cleaning unit comprises a cleaning liquid storage device and an ultrasonic generating device; the cleaning liquid storage device is communicated with the shell and is used for providing cleaning liquid for the shell; the ultrasonic generating device is arranged in the shell, is in control connection with the control transmission unit and is used for being matched with the cleaning liquid to form an ultrasonic cavitation effect and cleaning the interior of the shell; by means of the system, automatic cleaning can be achieved, cross contamination of detection samples can be avoided, and the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of gas concentration monitoring systems, in particular to a kind of volatile organic compounds online monitoring system. BACKGROUND

[0002] The reason for cleaning volatile organic compounds (VOCs) online monitoring system is mainly to ensure the accuracy and reliability of monitoring data; VOCs are complex and volatile, and long-term cleaning will accumulate pollutants on the detector, affecting the sensitivity and detection accuracy of the system.

[0003] In the prior art, the commonly used cleaning methods include direct wiping of dust and dirt, which is difficult to clean heavy dirt and easy to scratch the sensor, affecting the performance; it also includes using organic solvents for cleaning, which not only requires manual operation, but also some organic solvents are harmful to the human body, and improper operation will affect human health.

[0004] Therefore, in order to solve the above technical problems, a new technical means is needed. UTILITY MODEL CONTENT

[0005] Therefore, in order to improve the detection accuracy and realize automatic cleaning, the utility model provides a volatile organic compounds online monitoring system.

[0006] The volatile organic compounds online monitoring system provided by the utility model comprises a shell and a cleaning unit for cleaning the inside of the shell.

[0007] The cleaning unit comprises a cleaning liquid storage device and an ultrasonic wave generating device.

[0008] The cleaning liquid storage device is in communication with the shell and is used to provide cleaning liquid to the shell.

[0009] The ultrasonic wave generating device is arranged in the shell and is controlled by the control transmission unit, and is used to form ultrasonic cavitation effect with the cleaning liquid and clean the inside of the shell.

[0010] Further, the cleaning liquid storage device comprises a liquid delivery pipeline and a liquid storage container.

[0011] The liquid storage container is a plurality of, the liquid delivery pipeline is in communication with a plurality of liquid storage containers, and one end of the liquid delivery pipeline is in communication with the liquid inlet of the shell.

[0012] The liquid inlet of the shell is provided with a liquid inlet valve, and each liquid storage container is provided with a liquid outlet valve at the communication position of the liquid delivery pipeline, and the control input ends of the liquid inlet valve and the liquid outlet valve are connected with the control output end of the control transmission unit.

[0013] Further, the drying unit is fixedly arranged on the inner side wall of the top of the shell, and a control input end of the drying unit is connected to a control output end of the control transmission unit.

[0014] The top of the shell is further provided with an air outlet for discharging steam generated during operation of the drying unit, and an air outlet valve is arranged at the air outlet, and a control input end of the air outlet valve is connected to a control input end of the control transmission unit.

[0015] Further, the detection unit is arranged in the shell and used for detecting the concentration of volatile organic compounds in the target detection sample, an output end of the detection unit is connected to an input end of the control transmission unit, and the control transmission unit transmits detection information of the detection unit to the remote monitoring center.

[0016] Further, the collection container I is in communication with the liquid outlet of the shell and used for collecting the cleaning liquid discharged from the shell and the volatile organic compounds dissolved in the cleaning liquid.

[0017] The liquid outlet of the shell is provided with a liquid outlet valve, and a control input end of the liquid outlet valve is connected to a control output end of the control transmission unit.

[0018] Further, the collection unit is in communication with the air inlet of the shell, and the collection unit is used for collecting the detection sample and transmitting the detection sample into the shell.

[0019] The air inlet of the shell is provided with an air inlet valve, and a control input end of the air inlet valve is connected to a control output end of the control transmission unit.

[0020] Further, the collection container II is in communication with the air outlet of the shell through a pipeline and used for collecting the steam.

[0021] Further, the control transmission unit comprises a processor, a positioning module, a time-providing module and a wireless transmission module.

[0022] The processor is used for receiving the volatile organic compound concentration signal output by the detection unit and sending control signals to the cleaning liquid storage device, the ultrasonic wave generating device and the drying unit, the positioning module and the time-providing module are in communication connection with the processor, and the processor is in communication connection with the remote monitoring center through the wireless transmission module.

[0023] Further, the remote monitoring center comprises a monitoring server, a storage server, a touch display and an audible and visual alarm.

[0024] The monitoring server is in communication connection with the processor through a wireless transmission module, the storage server is in communication connection with the monitoring server, the touch display is in communication connection with the monitoring server, and a control output end of the monitoring server is connected to the sound-light alarm.

[0025] The utility model discloses a beneficial effect: the utility model discloses a clean liquid is transported to the shell, can effectively dissolve the volatile organic matter remaining in the shell, further opens ultrasonic wave generating device, through the cavitation effect of high frequency vibration, can remove the volatile organic matter adhered in the tiny gap inside detection device, ensure the cleanliness of shell and internal instrument, and the utility model discloses can directly control the cleaning unit work through controller, reduced manpower cost, realized automatic cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will be further described in connection with the drawings and examples:

[0027] Figure 1 It is the structural schematic diagram of the utility model.

[0028] Figure 2 It is the shell structure schematic diagram of the utility model.

[0029] Reference Signs: 1 - shell;1.1 - inlet valve;1.2 - liquid inlet valve;1.3 - liquid outlet valve;1.4 - outlet valve;2 - detection unit;3 - cleaning liquid storage device;3.1 - liquid delivery pipeline;3.2 - liquid storage container;3.3 - liquid discharge valve;4 - ultrasonic wave generating device;5 - drying unit;6 - collection container I;7 - collection container II;8 - pipeline. DETAILED DESCRIPTION

[0030] The utility model will be further described in connection with the drawings and examples:

[0031] The utility model discloses a kind of volatile organic matter online monitoring systems, as shown in Figure 2 The cleaning unit includes cleaning liquid storage device 3 and ultrasonic wave generating device 4.

[0032] The cleaning unit includes cleaning liquid storage device 3 and ultrasonic wave generating device 4.

[0033] The cleaning liquid storage device 3 is communicated with the shell 1, for providing cleaning liquid to the shell 1.

[0034] The ultrasonic wave generating device 4 is arranged in the shell 1, and the ultrasonic wave generating device 4 is controlled to be connected with control transmission unit, for forming ultrasonic cavitation effect with cleaning liquid and cleaning the inside of shell 1.

[0035] Through the system, remote detection of volatile organic compound concentration can be realized, and the system can be cleaned through remote control, cross contamination can be avoided, detection precision can be improved, and human resource waste can be reduced.

[0036] In the embodiment, the cleaning liquid storage device 3 comprises a liquid delivery pipeline 3.1 and a liquid storage container 3.2, as shown in the figure. Figure 2

[0037] The liquid storage container 3.2 is a plurality of, the liquid delivery pipeline 3.1 communicates with the plurality of liquid storage containers 3.2, and one end of the liquid delivery pipeline 3.1 communicates with the liquid inlet of the shell 1.

[0038] The liquid inlet of the shell 1 is provided with a liquid inlet valve 1.2, and each liquid storage container 3.2 is provided with a liquid discharge valve 3.3 at the communication position with the liquid delivery pipeline 3.1, and the control input ends of the liquid inlet valve 1.2 and the liquid discharge valve 3.3 are connected with the control output end of the control transmission unit.

[0039] Each time of use, the corresponding liquid discharge valve 3.3 can be opened by the control transmission unit to release the corresponding cleaning liquid, and the above-mentioned setting can isolate different kinds of cleaning liquid or different batches of cleaning liquid, and the batch refers to the use batch; since the shelf life of some cleaning liquid will be shortened after opening, it is preferred that one liquid storage container can store the amount of cleaning liquid for cleaning once, and the setting method can control the amount of cleaning liquid released each time, and can also ensure the shelf life of the cleaning liquid as much as possible; if the storage amount of one liquid storage container is enough for multiple cleaning, the release time should be calculated according to the volume of the shell 1 and the opening degree of the liquid discharge valve 3.3, or a liquid level sensor is arranged on the top of the container to detect whether the cleaning liquid fills the shell 1.

[0040] A closable opening (not shown in the figure) can also be arranged on each liquid storage container 3.2 to add cleaning liquid.

[0041] In the embodiment, the drying unit 5 is fixedly arranged on the inner side wall of the top of the shell 1, and the control input end of the drying unit 5 is connected with the control output end of the control transmission unit.

[0042] The drying unit 5 is fixedly arranged on the inner side wall of the top of the shell 1, and the control input end of the drying unit 5 is connected with the control output end of the control transmission unit.

[0043] The top of the shell 1 is also provided with an air outlet, and the air outlet can be provided with a plurality of, Figure 2 ​The exhaust port is shown, if multiple exhaust ports are set, the exhaust ports can be evenly arranged on both sides of the drying unit, the exhaust port is used to exhaust the steam generated during the operation of the drying unit, the exhaust valve 1.4 is arranged at the exhaust port, and the control input end of the exhaust valve 1.4 is connected to the control input end of the control transmission unit.

[0044] The drying unit 5 is used to dry the inside of the shell 1 and the instrument after cleaning the inside of the shell 1 with cleaning liquid. If the cleaning liquid remains in the inside of the shell 1 or on the detection instrument, it may affect the sensitivity and stability of the instrument. For example, if the cleaning liquid remains after cleaning the photoionization detector FID, it may affect the ignition performance and further affect the detection sensitivity. For the metal oxide sensor MOS, if the remaining cleaning liquid contains water, it may cause the metal parts to rust or corrode, thereby affecting the service life and detection effect of the equipment. The drying unit 5 can be selected according to different detection devices, including but not limited to infrared drying, electric heating drying and heating lamp; the corresponding drying device can be selected based on the temperature range supported by the detection device or experience, which is not described here. During the drying process, the steam rises, the control transmission unit opens the exhaust valve 1.4, and the steam in the inside of the shell 1 is exhausted through the exhaust port to achieve the drying effect.

[0045] In this embodiment, the detection unit 2 is also included, which is arranged in the shell 1 and used to detect the concentration of volatile organic compounds in the target detection sample. The output end of the detection unit 2 is connected to the input end of the control transmission unit, and the control transmission unit transmits the detection information of the detection unit 2 to the remote monitoring center.

[0046] The detection unit 2 can be a photoionization detector PID, a hydrogen flame ionization detector FID, a metal oxide sensor MOS, etc., and is preferably a photoionization detector PID;

[0047] The cleaning liquid stored in the liquid storage container 3.2 is set according to the corresponding detection instrument. When a photoionization detector is used, chromatographic grade methanol or acetone can be used as the cleaning liquid. When a hydrogen flame ionization detector is used, acetone or freon 113 solvent can be used. When cleaning the hydrogen flame ionization detector, the hydrogen source should be cut off. When a metal oxide sensor MOS is used, ethanol, isopropyl alcohol, etc. can be used as the cleaning liquid. The specific cleaning liquid is set according to experience. If multiple cleaning liquids are used at the same time, different types of cleaning liquids can be arranged in different liquid storage containers 3.2, and different materials and different light-shielding liquid storage containers 3.2 are used for different cleaning liquids. This process is set according to experience and is not described here.

[0048] The embodiment also comprises a collection container I 6 which is in communication with the liquid outlet of the shell 1 and is used to collect the cleaning liquid and volatile organic compounds dissolved in the cleaning liquid discharged from the shell 1;

[0049] The shell is provided with a liquid outlet valve 1.3 at the liquid outlet, and the control input end of the liquid outlet valve 1.3 is connected with the control output end of the control transmission unit. Since volatile organic compounds are harmful to the environment and human health, centralized collection can reduce the impact of volatile organic compounds on the environment and human health. In addition, the cleaning liquid can also be harmful to the human body, and centralized treatment can reduce the harm to the environment.

[0050] The embodiment also comprises a collection unit which is in communication with the air inlet of the shell 1, and the collection unit is used to collect the detection sample and transmit it into the shell 1;

[0051] The shell 1 is provided with an air inlet valve 1.1 at the air inlet, and the control input end of the air inlet valve 1.1 is connected with the control output end of the control transmission unit;

[0052] The sampling unit can be realized by a sampling pump, and the collection unit is not limited here.

[0053] The embodiment also comprises a collection container II 7 which is in communication with the air outlet of the shell 1 through a pipeline 8 and is used to collect the steam discharged through the air outlet, so as to avoid pollution of the environment by the cleaning liquid.

[0054] In the embodiment, the control transmission unit comprises a processor, a positioning module, a time-providing module and a wireless transmission module;

[0055] The processor is used to receive the volatile organic compound concentration signal output by the detection unit 2 and send control signals to the cleaning liquid storage device 3, the ultrasonic wave generating device 4 and the drying unit 5. The positioning module and the time-providing module are in communication connection with the processor, and the processor is in communication connection with the remote monitoring center through the wireless transmission module;

[0056] The processor adopts an existing chip or single-chip microcomputer. The positioning module is used to represent the position information of the current monitoring point and adopts a GPS positioning module or a Beidou positioning module. The time-providing module adopts an existing GPS time-providing circuit to ensure the synchronism of the whole system and also provides accurate clock information for the control of the processor.

[0057] In the embodiment, the remote monitoring center comprises a monitoring server, a storage server, a touch display and an audible and visual alarm;

[0058] The monitoring server is connected to the processor via a wireless transmission module, the storage server is connected to the monitoring server, the touch display is connected to the monitoring server, and the control output terminal of the monitoring server is connected to the audible and visual alarm.

[0059] The wireless transmission module uses existing 4G or 5G modules, and the audible and visual alarm is used to issue an alarm when the concentration of volatile organic compounds exceeds a set threshold.

[0060] The system provided in this application is suitable for cleaning stubborn dirt, and although the entire cleaning process is relatively long, it is more thorough than ordinary cleaning. Therefore, the cleaning cycle of the system can be set according to the user's needs. It can be cleaned after each test to ensure detection accuracy, or it can be cleaned only after multiple tests to reduce operating costs. If necessary, an inert gas generator can be installed, connected to the housing 1, with a valve at the connection point. When cleaning is required, the valve is opened to allow inert gas to be introduced to purge the inside of the housing 1, thereby removing volatile organic compounds adhering to the surface. After prolonged use, a thorough cleaning can be performed using the cleaning unit provided in this application. The specific cleaning method is as follows:

[0061] After detecting the concentration of volatile organic compounds in the sample, the control and transmission unit transmits the detection results to the remote monitoring center and controls the opening of the drain valve 3.3 and the inlet valve 1.2, allowing the cleaning solution to enter the housing 1 through the inlet pipe 3.1. After the cleaning solution soaks the housing 1 and the detection instrument for 10 minutes, the control and transmission unit controls the activation of the ultrasonic generator 4. The ultrasonic generator 4 cleans the housing 1 and the internal instruments by generating high-frequency sound waves. The cleaning typically lasts for 15 minutes. The control and transmission unit then turns off the ultrasonic generator 4 and opens the outlet valve 1.3 at the outlet. After the internal liquid and gas are discharged, the control and transmission unit controls the drying unit 5 to start working. After working for the set time, the control and transmission unit controls the drying unit 5 to stop working.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A volatile organic compound on-line monitoring system characterized by: The application relates to a cleaning device for a shell, which comprises a shell and a cleaning unit for cleaning the interior of the shell. The cleaning unit comprises a cleaning liquid storage device and an ultrasonic wave generating device. The cleaning liquid storage device is in communication with the shell and is used for providing the shell with cleaning liquid. The ultrasonic wave generating device is arranged in the shell and is in control connection with a control transmission unit, and is used for forming ultrasonic cavitation effect in cooperation with the cleaning liquid and cleaning the interior of the shell.

2. The system for on-line monitoring of volatile organic compounds according to claim 1, wherein: The cleaning liquid storage device comprises a liquid conveying pipeline and a liquid storage container. The liquid storage container is a plurality of liquid storage containers, the liquid conveying pipeline is in communication with the plurality of liquid storage containers, and one end of the liquid conveying pipeline is in communication with a liquid inlet of the shell. A liquid inlet valve is arranged at the liquid inlet of the shell, and a liquid outlet valve is arranged at the communication position of each liquid storage container and the liquid conveying pipeline.

3. The volatile organic compound on-line monitoring system according to any one of claims 1 or 2, wherein: The control input ends of the liquid inlet valve and the liquid outlet valve are connected with the control output end of the control transmission unit. The device further comprises a drying unit which is fixedly arranged on the inner side wall of the top of the shell, and the control input end of the drying unit is connected with the control output end of the control transmission unit.

4. The system for on-line monitoring of volatile organic compounds according to claim 1, wherein: The top of the shell is further provided with an air outlet which is used for discharging steam generated in the working process of the drying unit, and an air outlet valve is arranged at the air outlet, and the control input end of the air outlet valve is connected with the control input end of the control transmission unit.

5. The system for on-line monitoring of volatile organic compounds according to claim 1, wherein: The device further comprises a detection unit which is arranged in the shell and is used for detecting the volatile organic matter concentration in a target detection sample, and the output end of the detection unit is connected with the input end of the control transmission unit, and the control transmission unit transmits the detection information of the detection unit to a remote monitoring center. The device further comprises a collection container I which is in communication with a liquid outlet of the shell and is used for collecting the cleaning liquid discharged from the shell and the volatile organic matter dissolved in the cleaning liquid.

6. The system for on-line monitoring of volatile organic compounds according to claim 1, wherein: A liquid outlet valve is arranged at the liquid outlet of the shell, and the control input end of the liquid outlet valve is connected with the control output end of the control transmission unit. The device further comprises a collection unit which is in communication with an air inlet of the shell, and the collection unit is used for collecting a detection sample and transmitting the detection sample into the shell.

7. The system for on-line monitoring of volatile organic compounds according to claim 3, wherein: An air inlet valve is arranged at the air inlet of the shell, and the control input end of the air inlet valve is connected with the control output end of the control transmission unit.

8. The system for on-line monitoring of volatile organic compounds according to claim 3, wherein: The device further comprises a collection container II which is in communication with the air outlet of the shell through a pipeline and is used for collecting steam. The control transmission unit comprises a processor, a positioning module, a time service module and a wireless transmission module.

9. The system for on-line monitoring of volatile organic compounds according to claim 8, wherein: The processor is used for receiving the volatile organic matter concentration signal output by the detection unit and sending control signals to the cleaning liquid storage device, the ultrasonic wave generating device and the drying unit, the positioning module and the time service module are in communication connection with the processor, and the processor is in communication connection with the remote monitoring center through the wireless transmission module. The remote monitoring center comprises a monitoring server, a storage server, a touch display and an audible and visual alarm. The monitoring server is in communication connection with the processor through a wireless transmission module, the storage server is in communication connection with the monitoring server, the touch display is in communication connection with the monitoring server, and a control output end of the monitoring server is connected to the sound-light alarm.

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