CN210154881U - Sampling system for filterable particles and condensable particles - Google Patents
Sampling system for filterable particles and condensable particles Download PDFInfo
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- CN210154881U CN210154881U CN201920965400.4U CN201920965400U CN210154881U CN 210154881 U CN210154881 U CN 210154881U CN 201920965400 U CN201920965400 U CN 201920965400U CN 210154881 U CN210154881 U CN 210154881U
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Abstract
The utility model discloses a sampling system for filterable particulate matter and particulate matter that can condense belongs to environmental monitoring technical field. The device comprises a sampling nozzle, a sampling gun, a filterable particle collecting device, a condensable particle constant-temperature sampling pipe, a sample collecting bottle, a dryer, a flow monitoring and controlling device and an air pump which are connected in sequence; filterable particulate matter and condensable particulate matter in can accurately, high-efficiently gathering the sampling gas, whole system is kept at predetermined temperature, guarantees the particulate matter form uniformity that can condense, prevents the particulate matter adsorption loss that can condense that reasons such as dewfall caused simultaneously. The device structural design is reasonable, multiple functional, and each position temperature of system is controllable, satisfies the sampling needs of various occasions, and is nimble convenient, and the sampling efficiency is high, has filled filterable particulate matter and the blank in the aspect of the particulate matter collection monitoring that can condense.
Description
Technical Field
The utility model belongs to the technical field of environmental monitoring, concretely relates to a sampling system that is used for filterable particulate matter and particulate matter that can condense.
Background
The emission of particulates from stationary sources, including filterable and condensable particulates, has a tremendous impact on the environment. Filterable particulate matter becomes one of the important components of air PM2.5 after being discharged into the atmosphere. Condensable particulates typically exist in the form of condensed nuclei, with aerodynamic diameters less than 1 micron, are fine particulates, and include chemical constituents including soluble salts, volatile organics, sulfur trioxide, heavy metals, and the like. The condensable particles exist in a gaseous state before being discharged into the atmosphere, and are condensed into primary particles after being discharged. These particles directly threaten human health, and people are in urgent need to research the concentration and composition of the pollutants emitted by the particles of the fixed pollution source.
The sampling of filterable and condensable particles of stationary sources of pollution presents several difficulties.
1. The temperature variation range of a fixed pollution source sampling position is wide, the temperature of a common sampling position is different from 50-150 ℃, the early condensation of condensable particles is easily caused due to the excessively low flue gas temperature, and the representativeness of the collected sample is poor; the excessively high temperature of the flue gas easily causes the form change of condensable particles, thereby causing sampling errors; 2. under the high-dust-content environment of a fixed pollution source, the smoke dust can adsorb condensable particles and seriously block a sampling detection system, and the high-dust environment is difficult to collect representative condensable particles; 3. the current online particulate matter monitoring system feeds back the total particulate matter concentration value according to the change of the transmitted light absorbance, and the types of the particulate matters are not distinguished. In addition, the intensity of light emitted by an online particulate matter monitoring system instrument is easy to deviate in practical application, so that the monitored particulate matter concentration data is inaccurate; 4. the condensable particles have complex components and unstable properties, are easy to combine with smoke dust and are sensitive to temperature; 5. filterable particulate matter can adsorb the particulate matter that can condense, leads to sampling measurement result to appear the deviation, but filterable particulate matter and the particulate matter separation difficulty that can condense.
Currently, there is no reliable monitoring and sampling device for fixing filterable particles and condensable particles in pollution sources internationally.
Disclosure of Invention
In order to solve the problem, the utility model aims to provide a sampling system for filterable particulate matter and particulate matter that can condense, the device structural design is reasonable, multiple functional, and each position temperature of system is controllable, satisfies the sampling needs of various occasions, and is nimble convenient, has filled filterable particulate matter and the blank in the aspect of the particulate matter collection monitoring that can condense.
The utility model discloses a realize through following technical scheme:
the utility model discloses a sampling system for filterable particles and condensable particles, which comprises a sampling nozzle, a sampling gun, a filterable particle collecting device, a condensable particle constant-temperature sampling pipe, a sample collecting bottle, a dryer, a flow monitoring and controlling device and an air pump which are connected in sequence;
a pitot tube is fixed on the sampling gun, and the sampling gun is covered with a heat tracing sleeve; the pitot tube is connected with a velometer which is connected with a flow monitoring and controlling device; the condensable particle constant-temperature sampling pipe comprises a shell and a spiral pipeline inside the shell, wherein an inlet of the spiral pipeline is connected with a filterable particle collecting device, an outlet of the spiral pipeline is connected with a sample collecting bottle, the shell is connected with a temperature control device, and the temperature control device keeps the temperature inside the condensable particle constant-temperature sampling pipe constant through medium circulation between the temperature control device and the condensable particle constant-temperature sampling pipe; filterable particulate matter collection system sets up in the incubator.
Preferably, the filterable particle collection device comprises a cyclone separator and a fine particle filter, the fine particle filter is connected with an outlet of the cyclone separator, and an ash hopper is arranged at the lower part of the cyclone separator.
Preferably, a heating device and a second temperature probe are arranged inside the heat insulation box, and a heat insulation material is arranged on the outer wall of the heat insulation box.
Preferably, the temperature control device comprises a temperature controller, a heater, a refrigerator, a mixer and a third temperature probe; the third temperature probe is arranged in the shell of the particulate matter constant-temperature sampling pipe capable of condensing, the third temperature probe is connected with a temperature controller, the temperature controller is connected with a heater and a refrigerator, a temperature control device is connected with the shell of the particulate matter constant-temperature sampling pipe capable of condensing through a circulating pipeline, and the circulating pipeline is provided with a circulating pump.
Preferably, the outer wall of the condensable particle constant-temperature sampling tube is provided with a heat insulating material, and the medium in the shell pass of the condensable particle constant-temperature sampling tube is opposite to the flow direction of the sampling gas in the tube pass.
Preferably, the sampling gun comprises a quartz sampling rod, the heat tracing sleeve is covered on the quartz sampling rod, the heat tracing sleeve is provided with a first temperature probe, and the heat tracing sleeve is a nickel-chromium grid line heat tracing sleeve.
Preferably, the sampling nozzle is connected with the sampling gun through a clamping sleeve, and the clamping sleeve is a Teflon clamping sleeve or a special graphite clamping sleeve.
Preferably, the pipe diameter of the spiral pipeline in the condensable particle constant-temperature sampling pipe is gradually reduced from the inlet to the outlet.
Preferably, the flow monitoring and controlling device comprises a control device, a temperature detecting device, a pressure detecting device, a flow velocity detecting device, a flow detecting device and a flow regulating valve which are connected with the control device, and the control device is connected with the velocimeter; the flow detection device comprises an instantaneous flowmeter and an accumulative flowmeter.
Preferably, the halogen modified activated carbon is arranged inside the air extracting pump.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a sampling system for filterable particles and condensable particles, the whole sampling gun is accompanied by heat, which can effectively prevent the adsorption loss of the condensable particles in the sampling process; the heat preservation box keeps high temperature, can convert the form of the condensable particles in the filterable particle collection device, and ensures good sampling representativeness of the filterable particles and the condensable particles; the velocimeter measures the flow rate according to the pitot tube differential pressure, and the flow controller adjusts the flow rate according to the flow rate, so that constant-speed sampling and set-speed sampling can be realized; the temperature control device ensures accurate and stable collection of condensable particles in the condensable particle constant-temperature sampling pipe; the spiral pipeline in the condensable particle constant-temperature sampling pipe can enable the condensable particles in the target sampling gas to be separated out under the action of inertia and centrifugal force, and the condensable particles are effectively prevented from escaping. The device structural design is reasonable, multiple functional, and each position temperature of system is controllable, satisfies the sampling needs of various occasions, and is nimble convenient, and the sampling efficiency is high, has filled filterable particulate matter and the blank in the aspect of the particulate matter collection monitoring that can condense.
Furthermore, the filterable particulate matter collecting device adopts a two-stage dust removal mode combining the cyclone separator and the fine particle filter, so that deep dust removal of the target sampling gas can be realized, filterable particulate matters in the target sampling gas can be removed in a two-stage separation mode, and the removing effect is good.
Furthermore, the temperature in the heat preservation box can be monitored in real time through the second temperature probe, meanwhile, the heating device can be used for real-time control, heat loss in the heat preservation box is avoided through heat insulation materials, and the influence on sampling data caused by the transformation of the form of condensable particles in the filterable particle collecting device is avoided.
Further, can real time monitoring through the third temperature probe can condense the temperature in the particulate matter constant temperature sampling pipe, give the temperature controller with temperature value real-time transfer, carry out temperature adjustment through heater and refrigerator to the medium, the temperature distribution who makes the medium through the blender is even, makes the accurate stable collection of the particulate matter that can condense.
Furthermore, the flow direction of the medium in the shell pass of the condensable particle constant-temperature sampling tube is opposite to that of the sampling gas in the tube pass, the heat exchange effect is improved through the countercurrent heat exchange, the heat insulation material on the outer wall avoids heat loss,
furthermore, a gun rod of the sampling gun adopts a quartz sampling rod, so that the sampling gas is prevented from reacting with the sampling gun to influence sampling data, and the high-temperature resistance and the corrosion resistance are good; the temperature of the sampling gun can be monitored in real time through the first temperature probe, and real-time adjustment is carried out, so that the sampling gun is heated in the whole process to prevent adsorption loss of condensable particles in the sampling process; the heat tracing sleeve adopts a nickel-chromium grid line heat tracing sleeve, and the heat transfer efficiency is high.
Furthermore, the sampling nozzle and the sampling gun are connected through a Teflon clamping sleeve or a special graphite clamping sleeve, so that a good sealing effect can be achieved, and the sampling gun is high-temperature resistant and corrosion resistant.
Further, the pipe diameter of helical pipeline reduces from the entry to the export gradually in the particulate matter constant temperature sampling pipe that can condense, and this reducing structure can make the sampling gas velocity of flow increase gradually, increases the effect of appearing of particulate matter that can condense.
Furthermore, the control device can control the opening of the flow regulating valve and the flow according to the flow velocity of the sampling gas fed back by the velocimeter, so as to realize constant-speed measurement; meanwhile, the data of temperature, pressure, flow velocity, flow and the like of the sampled gas can be measured.
Furthermore, the halogen modified activated carbon is arranged in the air suction pump, so that gaseous particles in residual flowing gas can be adsorbed, and the environment and the human health are protected.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1 is the sampling mouth, 2 is the pitot tube, 3 is the sampling rifle, 4 is the tachymeter, 5 is the insulation can, 6 is cyclone, 7 is the ash bucket, 8 is fine particle filter, 9 is the particulate matter constant temperature sampling pipe that can condense, 10 is the collection appearance bottle, 11 is the desicator, 12 is flow monitoring and controller, 13 is the aspiration pump, 14 is temperature control device, 15 is the circulating pump, 16 is the temperature controller, 17 is the heater, 18 is the refrigerator, 19 is the blender.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention:
as shown in fig. 1, the sampling system for filterable particles and condensable particles of the present invention comprises a sampling nozzle 1, a sampling gun 3, a filterable particle collection device, a condensable particle constant temperature sampling tube 9, a sample collection bottle 10, a dryer 11, a flow monitoring and control device 12, and an air pump 13, which are connected in sequence;
the sampling nozzle 1 and the sampling gun 3 are connected through a clamping sleeve, and the clamping sleeve is a Teflon clamping sleeve or a special graphite clamping sleeve; a pitot tube 2 is fixed on a sampling gun 3, a gun rod of the sampling gun 3 adopts a quartz sampling rod, a heat tracing sleeve is coated on the quartz sampling rod, a first temperature probe is installed on the heat tracing sleeve, and the heat tracing sleeve is a nickel-chromium grid wire heat tracing sleeve which is heated by a nickel-chromium resistance wire adopting a grid wire structure. The pitot tube 2 is connected with a velocimeter 4, and the velocimeter 4 is connected with a flow monitoring and controlling device 12.
Be equipped with thermal insulation material on the 9 outer walls of particulate matter constant temperature sampling pipe that can condense, particulate matter constant temperature sampling pipe 9 that can condense includes the inside helical tube of shell and shell, but helical tube's entry is connected with filterable particulate matter collection system, helical tube's export and collection appearance bottle 10 are connected, the shell is connected with temperature control device 14, temperature control device 14 through with can condense the medium circulation between the particulate matter constant temperature sampling pipe 9, keep the inside constancy of temperature of particulate matter constant temperature sampling pipe 9 that can condense. The medium in the shell pass of the condensable particle constant-temperature sampling pipe 9 is opposite to the flow direction of the sampling gas in the pipe pass; and the pipe diameter of the spiral pipeline in the condensable particle constant-temperature sampling pipe 9 is gradually reduced from the inlet to the outlet.
The temperature control device 14 comprises a temperature controller 16, a heater 17, a refrigerator 18, a mixer 19 and a third temperature probe; the third temperature probe is arranged in the shell of the particulate matter constant temperature sampling pipe 9 which can be condensed, the third temperature probe is connected with a temperature controller 16, the temperature controller 16 is connected with a heater 17 and a refrigerator 18, a temperature control device 14 is connected with the shell of the particulate matter constant temperature sampling pipe 9 which can be condensed through a circulating pipeline, and the circulating pipeline is provided with a circulating pump 15.
Filterable particulate matter collection system includes insulation can 5, and cyclone 6 and fine particle filter 8 set up in insulation can 5, and fine particle filter 8 and 6 exit linkage of cyclone are equipped with ash bucket 7 in the lower part of cyclone 6. The heat preservation box 5 is internally provided with a heating device and a second temperature probe, the heating device can adopt a heating resistor or a heating pipe, and the outer wall of the heat preservation box 5 is provided with heat insulation materials, such as glass fiber, asbestos, rock wool, silicate and the like.
The drier 11 is internally provided with a drying agent which can remove moisture in the sampling gas; the dryer 11 can be made into a multi-chamber type, and different types of drying agents are filled in the dryer, so that the dewatering effect is improved. And when the sampling is finished, the smoke humidity value can be calculated according to the weight increase of the drying agent.
The flow monitoring and controlling device 12 comprises a control device, a temperature detecting device, a pressure detecting device, a flow velocity detecting device, a flow detecting device and a flow regulating valve which are connected with the control device, and the control device is connected with the velocimeter 4; the flow detection device comprises an instantaneous flowmeter and an accumulative flowmeter, wherein the instantaneous flowmeter can adopt an optical current flowmeter, and the accumulative flowmeter can adopt a membrane flowmeter.
Halogen modified activated carbon can be arranged in the air pump 13 to adsorb gaseous particles in residual flowing gas, so that the environment and the human health are protected.
Adopt the utility model discloses a method that is used for filterable particulate matter and can condense sampling system of particulate matter to carry out filterable particulate matter and can condense particulate matter sampling, include: checking the air tightness of the system, and respectively maintaining the sampling gun 3, the filterable particle collection device and the condensable particle constant-temperature sampling pipe 9 at preset constant temperatures through the heat tracing sleeve, the heat preservation box 5 and the temperature control device 14 according to actual sampling requirements; the sampling nozzle 1 is placed at a target sampling gas, the pitot tube 2 feeds back a pressure difference value at the sampling nozzle 1 to the velocimeter 4, the velocimeter 4 sends the calculated flow rate to the flow monitoring and control device 12, and the flow monitoring and control device 12 ensures constant-speed sampling by adjusting the flow rate;
the target sampling gas is separated into filterable particles through the filterable particle collecting device, enters the condensable particle constant-temperature sampling pipe 9, is separated out after passing through the spiral pipeline, continuously flows through the sample collecting bottle 10, the dryer 11, the flow monitoring and controlling device 12 and the air pump 13 and then is discharged out of the system; 2m in the state that the volume of the sampling gas of the continuous sampling target reaches the standard3After the above, the system is closed; the spiral pipeline is washed by deionized water, the constant-temperature sampling tube 9 for the condensable particles enters the sample collection bottle 10, and simultaneously,the filterable particles separated by the filterable particle collection device are collected, and the sampling of filterable particles and condensable particles is completed.
Several functions of the sampling system for filterable and condensable particles are further explained below in connection with the embodiments:
example 1
When the flue gas discharged by a fixed pollution source is sampled, the temperature of the sampling position of the fixed pollution source is generally 50-150 ℃, and the temperature of the sampling gun 3 and the temperature of the filterable particulate matter collecting device are respectively maintained at about 120 ℃ through the heat tracing sleeve and the heat insulation box 5; because the condensation temperature of sulfur trioxide which is one of the main components of the condensable particles is 65 ℃, the temperature of the constant-temperature sampling pipe 9 for the condensable particles is maintained at about 65 ℃ through the temperature control device 14, so that the condensable particles can be separated out.
Example 2
When sampling air at normal temperature, heating of the heat tracing sleeve, the heat insulation box 5 and the temperature control device 14 is stopped, and the system is kept at normal temperature for sampling.
The above embodiments are merely illustrative of the spirit of the present invention, and although the terms of the sampling nozzle 1, the pitot tube 2, the sampling gun 3, the velocimeter 4, etc. are used more often, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the present invention and are to be construed as any additional limitation which is not in accordance with the spirit of the present invention.
While the foregoing is directed to embodiments of the present invention, other and further modifications and embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A sampling system for filterable particles and condensable particles is characterized by comprising a sampling nozzle (1), a sampling gun (3), a filterable particle collecting device, a condensable particle constant-temperature sampling pipe (9), a sample collecting bottle (10), a dryer (11), a flow monitoring and controlling device (12) and an air pump (13) which are connected in sequence;
a pitot tube (2) is fixed on the sampling gun (3), and the sampling gun (3) is covered with a heat tracing sleeve; the pitot tube (2) is connected with a velocimeter (4), and the velocimeter (4) is connected with a flow monitoring and controlling device (12); the condensable particle constant-temperature sampling pipe (9) comprises a shell and a spiral pipeline inside the shell, an inlet of the spiral pipeline is connected with a filterable particle collecting device, an outlet of the spiral pipeline is connected with a sample collecting bottle (10), the shell is connected with a temperature control device (14), and the temperature control device (14) keeps the temperature inside the condensable particle constant-temperature sampling pipe (9) constant through medium circulation between the temperature control device and the condensable particle constant-temperature sampling pipe (9); filterable particulate matter collection system sets up in insulation can (5).
2. The sampling system for filterable and condensable particles according to claim 1, wherein the filterable particle collection means comprises a cyclone (6) and a fine particle filter (8), the fine particle filter (8) is connected with the outlet of the cyclone (6), and an ash hopper (7) is arranged at the lower part of the cyclone (6).
3. The sampling system for filterable and condensable particles according to claim 1, wherein the incubator (5) is provided with a heating device and a second temperature probe inside, and the outer wall of the incubator (5) is provided with a thermal insulation material.
4. The sampling system for filterable and condensable particles according to claim 1, wherein the temperature control device (14) comprises a thermostat (16), a heater (17), a refrigerator (18), a mixer (19) and a third temperature probe; the third temperature probe is arranged in the shell of the particulate matter coagulable constant-temperature sampling pipe (9), the third temperature probe is connected with a temperature controller (16), the temperature controller (16) is connected with a heater (17) and a refrigerator (18), a temperature control device (14) is connected with the shell of the particulate matter coagulable constant-temperature sampling pipe (9) through a circulating pipeline, and the circulating pipeline is provided with a circulating pump (15).
5. The sampling system for filterable and condensable particles according to claim 1, wherein the outer wall of the condensable particle constant temperature sampling pipe (9) is provided with a heat insulating material, and the medium in the shell side of the condensable particle constant temperature sampling pipe (9) is opposite to the flow direction of the sampling gas in the pipe side.
6. The sampling system for filterable and condensable particles according to claim 1, wherein the sampling gun (3) comprises a quartz sampling rod, the heat tracing sleeve is coated on the quartz sampling rod, the heat tracing sleeve is provided with a first temperature probe, and the heat tracing sleeve is a nickel-chromium grid line heat tracing sleeve.
7. The sampling system for filterable and condensable particles as claimed in claim 1, wherein the sampling nozzle (1) and the sampling gun (3) are connected by a ferrule, the ferrule being a teflon ferrule or a special graphite ferrule.
8. Sampling system for filterable and coagulable particles according to claim 1, wherein the diameter of the spiral pipe in the thermostatic sampling tube (9) for coagulable particles decreases from the inlet to the outlet.
9. The sampling system for filterable and condensable particles according to claim 1, wherein the flow monitoring and control unit (12) comprises a control unit and a temperature detection unit, a pressure detection unit, a flow rate detection unit, a flow detection unit and a flow regulation valve connected with the control unit, the control unit is connected with the velocimeter (4); the flow detection device comprises an instantaneous flowmeter and an accumulative flowmeter.
10. Sampling system for filterable and coagulable particles according to claim 1, characterized in that the suction pump (13) is internally provided with halogen-modified activated carbon.
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| CN201920965400.4U CN210154881U (en) | 2019-06-25 | 2019-06-25 | Sampling system for filterable particles and condensable particles |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146350A (en) * | 2019-06-25 | 2019-08-20 | 中国华能集团清洁能源技术研究院有限公司 | It is a kind of for may filter that the sampling system and method for particulate matter and condensable particulate matter |
| CN112504771A (en) * | 2020-11-30 | 2021-03-16 | 江苏大学 | Spiral cooling type diesel engine tail gas particulate matter sampling device and method |
| CN113532960A (en) * | 2021-08-19 | 2021-10-22 | 青岛聚源环保科技有限公司 | Automatic sampling monitoring system for atmospheric particulate matters |
| CN114720212A (en) * | 2022-06-08 | 2022-07-08 | 南京波瑞自动化科技有限公司 | A adjustable speed sampling device for particulate matter concentration detection in flue |
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2019
- 2019-06-25 CN CN201920965400.4U patent/CN210154881U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146350A (en) * | 2019-06-25 | 2019-08-20 | 中国华能集团清洁能源技术研究院有限公司 | It is a kind of for may filter that the sampling system and method for particulate matter and condensable particulate matter |
| CN112504771A (en) * | 2020-11-30 | 2021-03-16 | 江苏大学 | Spiral cooling type diesel engine tail gas particulate matter sampling device and method |
| CN112504771B (en) * | 2020-11-30 | 2022-10-28 | 江苏大学 | Spiral cooling type diesel engine tail gas particulate matter sampling device and method |
| CN113532960A (en) * | 2021-08-19 | 2021-10-22 | 青岛聚源环保科技有限公司 | Automatic sampling monitoring system for atmospheric particulate matters |
| CN114720212A (en) * | 2022-06-08 | 2022-07-08 | 南京波瑞自动化科技有限公司 | A adjustable speed sampling device for particulate matter concentration detection in flue |
| CN114720212B (en) * | 2022-06-08 | 2022-08-23 | 南京波瑞自动化科技有限公司 | A adjustable speed sampling device for particulate matter concentration detection in flue |
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