CN212722503U - Dust fall agent dust fall effect evaluation device - Google Patents
Dust fall agent dust fall effect evaluation device Download PDFInfo
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- CN212722503U CN212722503U CN202021458308.8U CN202021458308U CN212722503U CN 212722503 U CN212722503 U CN 212722503U CN 202021458308 U CN202021458308 U CN 202021458308U CN 212722503 U CN212722503 U CN 212722503U
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Abstract
The utility model discloses a dust fall effect evaluation device for a dust fall agent, which comprises a test box; the variable speed fan is communicated with the test box; the sample support table and the particle concentration detector are both arranged in the test box; the liquid distribution pipeline is inserted into the test box, and a spray head is arranged on a port arranged in the test box. The centrifugal pump is respectively communicated with a dust-settling agent stirring tank provided with a stirrer and the liquid distribution pipeline through pipelines; and a countdown electromagnetic valve and a rotor flowmeter are arranged on a pipeline between the centrifugal pump and the liquid distribution pipeline. The particle grading filter with the grading filter element is communicated with the test box. The utility model provides a dust fall agent dust fall effect evaluation device, its is easy and simple to handle, work efficiency is high, can simulate the raise dust that produces under the mechanical force effect and the raise dust that lasts the production under the certain wind speed of simulation, can carry out the abundant test to the dust fall agent, has improved test data's rate of accuracy and reliability.
Description
Technical Field
The utility model relates to a particulate matter measures technical field.
Background
The dust pollution directly threatens the life of people, and particularly, the dust pollution environment in the body can cause various cardiovascular and respiratory diseases and the like. The dust pollution has the greatest influence on the old and children.
The excessive dust is easy to breed germs and viruses, is extremely unfavorable for the health of the human body, and has great harm to the health of the skin.
Dust can be classified according to many characteristics, and in atmospheric pollution control, the dust particles can be classified according to the size of the dust particles in the atmosphere:
1. fly ash, which is a solid particulate having a particle size of less than 10 μm in the atmosphere, is sometimes referred to as floating dust, and is capable of floating in the atmosphere for a longer period of time. Also known as inhalable particles, abbreviated in english as PM 10.
2. Dustfall, which means solid particles with a particle size of greater than 10 μm in the atmosphere, which settle to the ground in a relatively short time under the influence of gravity.
3. Total aerosol refers to all solid particles in the atmosphere having a particle size of less than 100 μm. Also known as total suspended particulate matter, abbreviated in english as TSP.
4. Pulmonary particulate matter: refers to particles having a diameter of 2.5 microns or less in the atmosphere, also known as accessible lung particles (PM 2.5). Although PM2.5 is only a component of earth's atmospheric composition in small amounts, it has a significant effect on air quality and visibility, among other things. The PM2.5 has small particle size, is rich in a large amount of toxic and harmful substances, has long retention time in the atmosphere and long conveying distance, and thus has larger influence on human health and atmospheric environmental quality.
At present, one of effective methods is to adopt a chemical dust suppressant and a dust reducing agent. The chemical dust-settling agent gradually tends to be of a composite type, an ecological environment-friendly type and a special type, has wide application, multiple functions, high dust-settling efficiency and good dust-settling effect, and is concerned by the society in recent years; the novel dust-settling agent has good wettability and effect retention, and can quickly capture and adsorb coagulated dust.
The application case of using the dust-settling agent in controlling dust pollution generated in the processes of building construction, removal, coal mining, cement plant operation and the like is provided. The dust settling agent can quickly reduce the dust concentration in the air, reduce the atmospheric environmental pollution and reduce the harm to the human health. However, the performances of the different dedusting agents, such as dedusting rate, dedusting efficiency and efficiency conservation, are good and bad, a device or a system for testing and evaluating does not exist temporarily, and no standard is provided for specification, so that the dedusting agent with good dedusting effect cannot be selected quickly and effectively, and the popularization and wider application of the dedusting agent are limited. Therefore, the invention patent of China with the publication number of CN107036941A discloses a dust fall rate test evaluation device and a method, and the device comprises a cylindrical shell, wherein a dust spraying device is arranged on the upper side of the inner space of the shell and is connected with a motor on the outer side of the shell through a shaft, the bottom of the shell is connected with a conical opening, the lower side of the conical opening is connected with a dust collection box, an air blower for uniformly distributing dust is arranged on the inner side wall surface of the conical opening, a dust fall agent storage chamber is also arranged on the outer side of the shell and is connected to the inner side of the shell through an output pipeline, a pressure pump is arranged on the output pipeline, a pressure gauge is arranged on the pressure pump, a plurality of laser dust concentration and particle size measuring instruments are arranged on the inner side wall surface of the shell and are connected to a computer. The dust fall rate test and evaluation device is too simple in structure and not ideal in test effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an easy and simple to handle, test data is accurate reliable, dust fall agent dust fall effect evaluation device that work efficiency is high.
In order to achieve the above object, the present invention provides the following technical solutions:
a dust fall agent dust fall effect evaluation device, it includes:
a test box;
the variable speed fan is communicated with the test box;
a sample holder table and a particle concentration detector, both disposed within the test chamber;
the liquid distribution pipeline is inserted into the test box, and a spray head is arranged on a port in the test box;
the centrifugal pump is respectively communicated with the dust-settling agent stirring tank provided with the stirrer and the liquid distribution pipeline through pipelines; a countdown electromagnetic valve and a rotor flowmeter are arranged on a pipeline between the centrifugal pump and the liquid distribution pipeline;
and the particle grading filter is internally provided with a grading filter element and is communicated with the test box.
Furthermore, the variable speed fan is communicated with the test box through a round telescopic air pipe.
Furthermore, a check valve is arranged on an inner port of the round telescopic air pipe extending into the test box.
Further, the particle concentration detector is mounted on a suspension bracket fixed within the test chamber.
Furthermore, the bottom of the test box is provided with a liquid discharge hole.
Furthermore, a drain valve is arranged on the drain hole.
Furthermore, a pressure gauge is arranged on a pipeline between the centrifugal pump and the liquid distribution pipeline.
Further, the particulate matter grading filter is communicated with the test box through a gate valve pipeline, and a gate valve is arranged on the gate valve pipeline.
Further, the variable speed fan is a digital display variable speed fan.
Further, the spray head is an atomizing spray head.
The utility model provides a dust fall agent dust fall effect evaluation device, its is easy and simple to handle, work efficiency is high, can simulate the raise dust that produces under the mechanical force effect and the raise dust that lasts the production under the certain wind speed of simulation, can carry out the abundant test to the dust fall agent, has improved test data's rate of accuracy and reliability.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is the utility model provides a dust fall agent dust fall effect evaluation device's schematic diagram.
Description of reference numerals:
1. a test box; 2. a variable speed fan; 3. a circular telescopic air duct; 4. a non-return valve; 5. a sample holder stage; 6. a dust-settling agent stirring tank; 7. a stirrer; 8. a centrifugal pump; 9. a rotameter; 10. a pressure gauge; 11. a countdown solenoid valve; 12. a liquid distribution pipeline; 13. a spray head; 14. a drain hole; 15. a drain valve; 16. a suspension bracket; 17. a particle concentration detector; 18. a gate valve; 19. a gate valve conduit; 20. a particulate matter classifying filter; 21. and (5) grading filter elements.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1, a device for evaluating the dust-settling effect of a dust-settling agent comprises:
a test box 1;
the variable speed fan 2 is communicated with the test box 1;
a sample holder table 5 and a particle concentration detector 17, both disposed within the test chamber 1;
and a liquid distribution pipe 12 inserted into the test box 1 and having a spray head 13 attached to a port provided in the test box 1.
The centrifugal pump 8 is respectively communicated with the dust reducing agent stirring tank 6 provided with the stirrer 7 and the liquid distribution pipeline 12 through pipelines; a countdown electromagnetic valve 11 and a rotor flowmeter 9 are arranged on a pipeline between the centrifugal pump 8 and the liquid distribution pipeline.
A particle classifying filter 20 with a classifying filter element 21 therein, the particle classifying filter 20 being in communication with the test chamber 1.
Specifically, dust fall agent dust fall effect evaluation device, it includes test box 1, variable speed fan 2, circular flexible tuber pipe 3, check valve 4, sample support platform 5, dust fall agent agitator tank 6, agitator 7, centrifugal pump 8, rotor flowmeter 9, manometer 10, count-down solenoid valve 11, cloth liquid pipeline 12, shower nozzle 13, flowing back valve 15, mounted support 16, particle concentration detector 17, gate valve 18, gate valve pipeline 19, particulate matter fractional filter 20.
The test box 1 is in a cuboid shape and is made of acrylic transparent materials. The test box 1 is hollow, a recess is formed at the bottom in the box, a liquid discharge hole 14 is formed in the recess, and a liquid discharge valve 15 is mounted on the liquid discharge hole 14.
A sample holder table 5 is placed in the test chamber 1 and placed in the recess. A suspension bracket 16 is fixed on one side of the top in the test box 1, a particle concentration detector 17 is arranged on the suspension bracket 16, and the particle concentration detector 17 can measure the number concentration and the mass concentration of dust particles.
The variable speed fan 2 is preferably a digital display variable speed fan, and the generated wind speed can be between 0 and 20 m/s. The variable speed fan 2 is communicated with one side of the test box 1 through a round telescopic air pipe 3. The round telescopic air pipe 3 extends into the inner port of the test box 1 and is provided with a check valve 4.
The liquid distribution pipeline 12 is inserted into the test box 1 from the top of the test box 1, and a plurality of nozzles 13 are arranged on a plurality of ports of the liquid distribution pipeline 12 arranged in the test box 1. The spray heads 13 are preferably atomizing spray heads, and the spray heads 13 correspond to the ports one by one.
The centrifugal pump 8 is respectively communicated with a dust-reducing agent stirring tank 6 (internally provided with dust-reducing agent) provided with a stirrer 7 and the liquid distribution pipeline 12 through pipelines. The stirrer 7 may stir the dedusting agent in the dedusting agent stirring tank 6.
A countdown electromagnetic valve 11, a rotor flow meter 9 and a pressure gauge 10 are arranged on a pipeline between the centrifugal pump 8 and the liquid distribution pipeline 12.
A particle grading filter 20 is provided with a grading filter element 21, the particle grading filter 20 is communicated with the other side of the test box 1 through a gate valve pipeline 19, and a gate valve 18 is arranged on the gate valve pipeline 19. The particulate matter classifying filter 20 is provided near a side of the test chamber 1 adjacent to the particulate concentration detector 17.
The device comprises a test box 1, a variable speed fan 2, a round telescopic air pipe 3, a check valve 4, a sample support table 5, a dust-reducing agent stirring tank 6, a stirrer 7, a centrifugal pump 8, a rotor flow meter 9, a pressure gauge 10, a countdown electromagnetic valve 11, a liquid distribution pipeline 12, a spray head 13, a liquid discharge valve 15, a suspension support 16, a particle concentration detector 17, a gate valve 18, a gate valve pipeline 19 and a particle grading filter 20, wherein the existing mature products in the market are selected.
Instructions for use:
1. the evaluation device quantitatively evaluates the dustfall effect of the dustfall agent mainly by detecting changes in the number concentration and mass concentration of dust particles in the test box 1 before and after dustfall.
2. The parameters that can be regulated and controlled by the evaluation device are as follows: the spraying time of the dust-settling agent causes the wind speed of the flying dust and the flow of the dust-settling agent.
3. The test categories are:
(1) simulating the dust generated under the action of mechanical force, such as: at the transfer joint of the coal conveyor belt, dust is generated due to the falling of the coal powder.
The testing process comprises the following steps:
a. a particulate sample consisting of undersize of a 50 mesh filter screen was placed on a sample holder table 5 in the test box 1.
b. The drain valve 15 at the bottom of the test chamber 1 and the gate valve 18 on the gate valve pipe 19 are closed, the test solution (dust-reducing agent) is added to the stirring tank 6, and the stirrer 7 is opened.
c. The digital display variable speed fan 2 is turned on,setting the wind speed to be 20m/s, and the continuous blowing time to be more than 1min to ensure that the dust particles are filled in the test box 1, checking the detection value of the particle concentration detector 17 at the moment, and keeping the number concentration and the mass concentration of the dust particles measured by the detector 17 constant (the value is N)0And M0) Then, dust removal is started.
d. The time of the countdown solenoid valve 11 was set to 20s (the time of spraying the dust fall agent was also set to 20s), and the rotameter 9 was opened to start dust fall.
e. After the dustfall is finished, the detection value of the particle concentration detector 17 is checked, and the number concentration and the mass concentration of the dust particles detected by the detector 17 are respectively N1And M1. Particle number concentration dust fall rate eta1＝(N0-N1)/N0Dust falling rate eta of particle mass concentration2＝(M0-M1)/M0The dust fall rate is eta ═ eta1+η2)/2
f. And opening a liquid discharge valve 15 at the bottom of the test box to discharge the dust falling liquid. The gate valve 18 is opened, the variable speed fan 2 is opened, particles which are not subjected to dust fall are blown into the particle grading filter 20 (the filtering diameter of a filter element of the grading filter is greater than 50um, 20-50um, 9-20um, 0.43-9um and less than 0.43um), pollution to the atmosphere is prevented, meanwhile, the quality analysis is carried out on the graded particles, and certain reference is provided for subsequent improvement of the tested dust fall agent.
(2) The dust generated continuously under a certain wind speed (the evaluation device of the embodiment can simulate the wind speed of first-grade to sixth-grade natural wind) is simulated. And testing the dust settling effect under the influence of different wind speeds. Such as: dust emission of the construction site.
The testing process comprises the following steps:
a. a particulate sample consisting of undersize of a 50 mesh filter screen was placed on a sample holder table 5 in the test box 1.
b. The drain valve 15 at the bottom of the test chamber and the gate valve 18 on the gate valve pipe 19 are closed, the test solution is added to the stirring tank 6, and the stirrer 7 is started.
c. Starting the digital display variable speed fan 2, setting a proper wind speed, keeping the set wind speed to continuously blow for powderThe detection value of the particle concentration detector 17 is checked when the test chamber 1 is filled with dust particles, and the number concentration and the mass concentration of the dust particles detected by the detector 17 are kept constant at a certain value (the value is counted as N)0And M0) Then, dust removal is started.
d. The time of the countdown solenoid valve 11 was set to 20s (the time of spraying the dust fall agent was also set to 20s), and the rotameter 9 was opened to start dust fall.
e. After the dust fall is finished, checking the detection value of the particle concentration detector 17, and after the value is stable, respectively setting the number concentration and the mass concentration of the dust particles measured by the detector 17 as N1And M1. Particle number concentration dust fall rate eta1＝(N0-N1)/N0Dust falling rate eta of particle mass concentration2＝(M0-M1)/M0
f. And (3) closing the variable speed fan 2, opening a liquid discharge valve 15 at the bottom of the test box 1, and discharging the dust falling liquid. The gate valve 18 is opened, the variable speed fan 2 is opened, particles which are not subjected to dust fall are blown into the particle grading filter 20 (the filtering diameter of a filter element of the grading filter is greater than 50um, 20-50um, 9-20um, 0.43-9um and less than 0.43um), pollution to the atmosphere is prevented, meanwhile, the quality analysis is carried out on the graded particles, and certain reference is provided for subsequent improvement of the tested dust fall agent.
Above-mentioned dust fall agent dust fall effect evaluation device, its easy and simple to handle, work efficiency is high, can simulate the raise dust that produces under the mechanical force effect and simulate the raise dust that lasts the production under the certain wind speed, can carry out abundant test to the dust fall agent, has improved the rate of accuracy and the reliability of test data.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. The utility model provides a dust fall agent dust fall effect evaluation device which characterized in that includes:
a test box;
the variable speed fan is communicated with the test box;
a sample holder table and a particle concentration detector, both disposed within the test chamber;
the liquid distribution pipeline is inserted into the test box, and a spray head is arranged on a port in the test box;
the centrifugal pump is respectively communicated with the dust-settling agent stirring tank provided with the stirrer and the liquid distribution pipeline through pipelines; a countdown electromagnetic valve and a rotor flowmeter are arranged on a pipeline between the centrifugal pump and the liquid distribution pipeline;
and the particle grading filter is internally provided with a grading filter element and is communicated with the test box.
2. The device for evaluating the dust settling effect of the dust settling agent according to claim 1, wherein the variable speed fan is communicated with the test box through a circular telescopic air pipe.
3. The device for evaluating the dust settling effect of the dust settling agent according to claim 2, wherein a check valve is arranged on an inner port of the circular telescopic air pipe extending into the test box.
4. The apparatus for evaluating the dustfall effect of a dustfall agent according to claim 1, wherein the particle concentration detector is mounted on a suspension holder fixed in the test chamber.
5. The device for evaluating the dust-settling effect of the dust-settling agent according to claim 1, wherein a liquid discharge hole is formed in the bottom of the test box.
6. The apparatus according to claim 5, wherein a drain valve is installed on the drain hole.
7. The device for evaluating the dust-settling effect of the dust-settling agent according to claim 1, wherein a pressure gauge is arranged on a pipeline between the centrifugal pump and the liquid distribution pipeline.
8. The apparatus according to claim 1, wherein the particulate classification filter is connected to the test chamber via a gate valve line, and a gate valve is installed on the gate valve line.
9. The device for evaluating the dust settling effect of the dust settling agent according to claim 1, wherein the variable speed fan is a digital display variable speed fan.
10. The device for evaluating the dust-settling effect of the dust-settling agent according to claim 1, wherein the spray head is an atomizing spray head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021458308.8U CN212722503U (en) | 2020-07-22 | 2020-07-22 | Dust fall agent dust fall effect evaluation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021458308.8U CN212722503U (en) | 2020-07-22 | 2020-07-22 | Dust fall agent dust fall effect evaluation device |
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| CN212722503U true CN212722503U (en) | 2021-03-16 |
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| CN202021458308.8U Expired - Fee Related CN212722503U (en) | 2020-07-22 | 2020-07-22 | Dust fall agent dust fall effect evaluation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200081A (en) * | 2021-12-02 | 2022-03-18 | 河北交规院瑞志交通技术咨询有限公司 | Dust suppression efficiency measuring device and measuring method for dust suppressant |
| CN114878746A (en) * | 2022-04-24 | 2022-08-09 | 广东环境保护工程职业学院 | Dust remover performance detection device |
-
2020
- 2020-07-22 CN CN202021458308.8U patent/CN212722503U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200081A (en) * | 2021-12-02 | 2022-03-18 | 河北交规院瑞志交通技术咨询有限公司 | Dust suppression efficiency measuring device and measuring method for dust suppressant |
| CN114878746A (en) * | 2022-04-24 | 2022-08-09 | 广东环境保护工程职业学院 | Dust remover performance detection device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210316 Termination date: 20210722 |
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| CF01 | Termination of patent right due to non-payment of annual fee |