An online monitoring system for dust particles

Abstract

The invention relates to an online monitoring system for dust particles, comprising a chassis, a sampling tube vertically arranged on the top of the chassis, a sampling head arranged on the top of the sampling tube, a heater sleeved on the sampling tube, a water vapor separator arranged between the sampling tube and the sampling head, a particle detection module, a sampling pump, a control module, and a temperature controller respectively arranged in the chassis; the sampling tube, the particle detection module, and the sampling pump are connected in sequence through an air pipe; the invention first removes water droplets in the air, especially large water droplets, through a water vapor separator, and then removes residual water droplets in the air through a heater, and the combination of the two can effectively ensure the accuracy of measurement data even in haze weather or a harsh environment with high humidity.

Description

Technical Field

[0001] The invention relates to the field of air detection, and in particular to an online monitoring system for dust particles. Background Art

[0002] With the continuous development of social economy, air pollution and air quality issues have attracted more and more attention from people; using air quality detectors to obtain the current overall air quality status and thus provide corresponding parameters can bring great advantages to air quality management. For example, the prior art 201620042886.0 discloses a particle sampling heating and insulation device in an air quality monitoring system, and the prior art 201620074226.0 discloses an environmental air quality monitor. Although the above prior art can eliminate tiny water droplets in the air by heating and reduce the impact of water droplets on the particle sensor, in haze weather or harsh environments with high humidity, large water droplets in the air cannot be effectively eliminated by heating alone, which will cause the monitoring results to be significantly larger, resulting in inaccurate measurements. Summary of the invention

[0003] The purpose of the present invention is to provide an online monitoring system for dust particles in order to overcome the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an online monitoring system for dust particles, comprising a chassis, a sampling tube vertically arranged on the top of the chassis, a sampling head arranged on the top of the sampling tube, a heater sleeved on the sampling tube, a water-gas separator arranged between the sampling tube and the sampling head, a particle detection module, a sampling pump, a control module, and a temperature controller respectively arranged in the chassis; the sampling tube, the particle detection module, and the sampling pump are connected in sequence through an air pipe; the water-gas separator includes a shell, a separation chamber, an air collecting chamber, and a water collecting chamber arranged in the shell and placed in sequence from top to bottom; a plurality of air guide tubes vertically placed and connected to the air collecting chamber are arranged in the separation chamber; a liquid guide hole passing through the air collecting chamber and connected to the water collecting chamber is arranged at the bottom of the separation chamber; an air inlet connected to the sampling head is arranged on the side of the separation chamber, and an air outlet connected to the sampling tube is arranged on the side of the air collecting chamber.

[0005] Preferably, a desiccant is provided in the gas collecting chamber.

[0006] Preferably, a plurality of drainage holes are provided at the bottom of the water collecting chamber; the drainage holes are in a trumpet shape that is wide inside and narrow outside.

[0007] Preferably, the heater comprises a heating wire spirally wound around the sampling tube and a heat-insulating shield sleeved outside the heating wire.

[0008] Preferably, a collection protection filter and a sheath gas protection filter are provided in the chassis; the collection protection filter is respectively connected to the air outlet of the particle detection module and the air inlet of the sampling pump through an air pipe; one end of the sheath gas protection filter is connected to the air outlet of the sampling pump through the air pipe, and the other end is divided into two paths, one path is connected to the air inlet of the particle detection module through the air pipe, and the other path is directly discharged into the chassis through the exhaust port.

[0009] Preferably, the chassis is provided with a wind speed sensor, a wind direction sensor, a noise sensor, and a temperature, humidity and air pressure sensor.

[0010] Preferably, a router module is provided in the chassis; the control module can remotely send data to the monitoring platform through the router module.

[0011] Preferably, a storage hard disk for storing data is provided in the chassis.

[0012] Preferably, a switching power supply and an air switch are also provided in the chassis.

[0013] Preferably, a cooling fan and a protective cover located outside the cooling fan are provided on the side of the chassis.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] 1. The present invention first removes water droplets in the air, especially large water droplets, through a water vapor separator, and then removes the remaining water droplets in the air through a heater. The combination of the two can effectively ensure the accuracy of the measurement data even in haze weather or harsh environments with high humidity;

[0016] 2. The present invention can filter dust particles in the air through the collection protection filter, thereby increasing the service life of the sampling pump; the sheath gas protection filter can return clean air to the particle detection module as sheath gas to dilute the particle components, backflush the particle sensor, extend the service life of the sensor and the collection pump, and play a protective role;

[0017] 3. The present invention integrates particle detection, wind speed detection, wind direction detection, noise detection, temperature, humidity and air pressure detection, and can measure multiple atmospheric environment parameters at the same time;

[0018] 4. The present invention is also equipped with a self-starting module, which can realize remote reset, power-off restart, fault diagnosis, program burning and upgrading through the router module, making repair and maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0020] AttachedFigure 1 It is a structural diagram of the online monitoring system for dust particles of the present invention;

[0021] Attached Figure 2 is a cross-sectional view of a water-gas separator in the present invention;

[0022] Attached Figure 3 for Figure 2 Sectional view at AA;

[0023] Attached Figure 4 for Figure 2 Cross-sectional view at BB in the middle.

[0024] Among them: 1. Chassis; 2. Cooling fan; 3. Protective cover; 4. Switching power supply; 5. Air switch; 6. Temperature controller; 7. Wind direction sensor; 8. Self-starting module; 9. Noise sensor; 10. Control module; 11. Sampling head; 12. Water vapor separator; 121. Shell; 122. Air duct; 123. Separation chamber; 124. Gas collecting chamber; 125. Liquid guide hole; 126. Water collecting chamber; 127. Drain hole; 128. Air outlet; 129. Air inlet; 13. Heater; 131. Heating wire; 132. Protective cover; 14. Sampling tube; 15. Wind speed sensor; 16. Particle detection module; 17. Collection protection filter; 18. Exhaust port; 19. Sheath gas protection filter; 20. Temperature, humidity and air pressure sensor; 21. Storage hard disk; 22. Sampling pump; 23. Router module. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Attached Figure 1-4The dust particle online monitoring system of the present invention comprises a chassis 1, a sampling tube 14 vertically arranged on the top of the chassis 1, a sampling head 11 arranged on the top of the sampling tube 14, a heater 13 sleeved on the sampling tube 14, a water vapor separator 12 arranged between the sampling tube 14 and the sampling head 11, a particle detection module 16, a sampling pump 22, a control module 10, and a temperature controller 6 respectively arranged in the chassis 1; the sampling tube 14, the particle detection module 16, and the sampling pump 22 are connected in sequence through an air pipe; the water vapor separator 12 comprises a shell 121, a heater 13 arranged in the shell 121 and A separation chamber 123, an air collecting chamber 124, and a water collecting chamber 126 are arranged in sequence from top to bottom; a plurality of air guide tubes 122 are arranged vertically in the separation chamber 123 and communicate with the air collecting chamber 124; a liquid guide hole 125 is arranged at the bottom of the separation chamber 123 and communicates with the water collecting chamber 126 through the air collecting chamber 124; an air inlet 129 is arranged on the side of the separation chamber 123 and communicates with the sampling head 11, and an air outlet 128 is arranged on the side of the air collecting chamber 124 and communicates with the sampling tube 14; the particle detection module 16 is connected to the input end line of the control module 10, and the sampling pump 22 and the heater 1 3. The temperature controller 6 is connected to the output end line of the control module 10, wherein the temperature controller 6 is used to adjust the heating temperature of the heater 13; when working: under the action of the sampling pump 22, the air passes through the sampling head 11, the water-gas separator 12, the sampling tube 14, and the particle detection module 16 in sequence, and is finally discharged by the sampling pump 22; wherein the function of the water-gas separator 12 is to remove water droplets in the air, especially large water droplets. The specific working process is: the sampled air enters the separation chamber 123 through the air inlet 129. Since the water droplets are heavier than the particles, the air containing the particles will enter the air collecting chamber 124 through the multiple air guide tubes 122 The air in the air passes through the air outlet 128 and finally enters the sampling tube 14, while the water droplets in the air sink and flow into the water collecting chamber 126 through the liquid guide hole 125 to achieve water-gas separation; wherein the heater 13 is used to heat and remove the residual water droplets in the air, that is, to heat and vaporize them to form water vapor that does not affect the effect of the sensor; wherein the particle detection module 16 is used to measure the particle content of the air and send a signal to the control module 10; wherein the control module 10 can specifically adopt any suitable processor with certain computing power in the prior art (such as AVR single-chip microcomputer, STM32F103), etc.

[0027] Furthermore, the sampling port of the sampling head 11 is provided with a filter screen, which adopts a microporous stainless steel screen structure, and can isolate large particles of foreign matter such as willow cotton, foreign matter from construction sites and roads, etc., but does not isolate components such as PM2.5 / PM10.0 / TSP.

[0028] Furthermore, a desiccant is provided in the gas collecting cavity 124 to further remove moisture and odor from the air and improve measurement accuracy.

[0029] Furthermore, a plurality of drainage holes 127 are provided at the bottom of the water collecting chamber 126; the drainage holes 127 are in a trumpet shape that is wide inside and narrow outside, so that outdoor water vapor is not easy to enter.

[0030] Furthermore, the heater 13 includes a heating wire 131 spirally wound on the sampling tube 14 and a heat-insulating shield 132 sleeved outside the heating wire 131, wherein the heating wire 131 is double or multiple strands evenly and tightly connected, and the shield 132 is filled with heat-insulating materials, including but not limited to heat-insulating cotton, tin foil, asbestos, etc.

[0031] Furthermore, a collection protection filter 17 and a sheath gas protection filter 19 are provided in the chassis 1; the collection protection filter 17 is connected to the air outlet of the particle detection module 16 and the air inlet of the sampling pump 22 respectively through an air pipe, and is used to filter dust particles in the air and increase the service life of the sampling pump 22; one end of the sheath gas protection filter 19 is connected to the air outlet of the sampling pump 22 through an air pipe, and the other end is divided into two paths, one of which is connected to the air inlet of the particle detection module 16 through the air pipe, and the clean air is returned to the particle detection module 16, which is used as sheath gas to dilute the particulate matter components and back-blow the particle sensor, thereby extending the service life of the sensor and the collection pump and playing a protective role, and the other path directly discharges the clean air into the chassis 1 through the exhaust port 18.

[0032] Furthermore, the chassis 1 is provided with a wind direction sensor 7, a wind speed sensor 15, a noise sensor 9, and a temperature, humidity and air pressure sensor 20 which are respectively connected to the input end lines of the control module 10, wherein the wind speed sensor 15 and the wind direction sensor 7 measure the wind direction and wind speed at any time, the noise sensor 9 measures the noise, and the temperature, humidity and air pressure sensor 20 measures the temperature, humidity and air pressure, and sends the signal to the control module 10, and the above sensors can adopt the sensors commonly used in the prior art to obtain the corresponding air quality parameters.

[0033] Furthermore, a router module 23 connected to the output terminal of the control module 10 is provided in the chassis 1; the control module 10 can remotely send data to the monitoring platform through the router module 23, thereby achieving the purpose of remote monitoring.

[0034] Furthermore, the chassis 1 is provided with a storage hard disk 21 connected to the output end of the control module 10, which can be used to store the ambient air data within a period of time.

[0035] Furthermore, the chassis 1 is provided with a self-starting module 8 connected to the output terminal line of the control module 10, which can realize remote reset, power-off restart, fault diagnosis, program burning and upgrading through the router module 23, making repair and maintenance more convenient.

[0036] Furthermore, a switching power supply 4 and an air switch 5 are also provided in the chassis 1; the input end of the switching power supply 4 is connected to the external power line, and the output end is connected to the input end line of the air switch 5; the output end of the air switch 5 is respectively connected to the electronic component lines in the chassis 1; wherein the switching power supply 4 can convert the original ecological power supply with poor power quality, such as the mains power supply or the battery power supply, into a DC voltage with higher quality that meets the requirements of the equipment, and the air switch 5 plays a role in circuit safety.

[0037] Furthermore, a cooling fan 2 connected to the output terminal of the control module 10 and a protective cover 3 located outside the cooling fan 2 are provided on the side of the chassis 1 to prevent the temperature in the chassis 1 from being too high and affecting the normal use of various electronic components.

[0038] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. An online monitoring system for dust particles, comprising a chassis, a sampling tube vertically arranged on the top of the chassis, a sampling head arranged on the top of the sampling tube, a particle detection module, a sampling pump, and a control module respectively arranged in the chassis; the sampling tube, the particle detection module, and the sampling pump are connected in sequence through an air pipe; Features: It also includes a heater sleeved on the sampling tube, a water-gas separator arranged between the sampling tube and the sampling head, and a temperature controller arranged in the chassis for controlling the heating temperature of the heater; The heater comprises a heating wire spirally wound on the sampling tube, and a heat-insulating shield sleeved outside the heating wire; The water-gas separator comprises a shell, a separation chamber, an air collecting chamber, and a water collecting chamber which are arranged in the shell and are arranged in sequence from top to bottom; a plurality of air guide tubes which are arranged vertically and communicate with the air collecting chamber are arranged in the separation chamber; a liquid guide hole which passes through the air collecting chamber and communicates with the water collecting chamber is arranged at the bottom of the separation chamber; an air inlet which communicates with the sampling head is arranged at the side of the separation chamber, and an air outlet which communicates with the sampling tube is arranged at the side of the air collecting chamber; a plurality of drainage holes are arranged at the bottom of the water collecting chamber; the drainage holes are in the shape of a trumpet which is wide inside and narrow outside; A collection protection filter and a sheath gas protection filter are arranged in the chassis; the collection protection filter is respectively connected to the air outlet of the particle detection module and the air inlet of the sampling pump through an air pipe; one end of the sheath gas protection filter is connected to the air outlet of the sampling pump through the air pipe, and the other end is divided into two paths, one path is connected to the air inlet of the particle detection module through the air pipe, and the other path is directly discharged into the chassis through the exhaust port.

2. The dust particle online monitoring system according to claim 1 is characterized in that: A desiccant is arranged in the gas collecting cavity.

3. The dust particle online monitoring system according to claim 1 or 2, characterized in that: The chassis is provided with a wind speed sensor, a wind direction sensor, a noise sensor, and a temperature, humidity and air pressure sensor.

4. The dust particle online monitoring system according to claim 3 is characterized in that: A router module is arranged in the chassis; the control module can remotely send data to the monitoring platform through the router module.

5. The dust particle online monitoring system according to claim 4 is characterized in that: A storage hard disk for storing data is arranged in the chassis.

6. The dust particle online monitoring system according to claim 5 is characterized in that: A switching power supply and an air switch are also arranged in the chassis.

7. The dust particle online monitoring system according to claim 6 is characterized in that: A cooling fan and a protective cover located outside the cooling fan are arranged on the side of the chassis.

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