CN115541270A - System for testing efficiency of aerosol purification equipment under multi-working-condition - Google Patents
System for testing efficiency of aerosol purification equipment under multi-working-condition Download PDFInfo
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- CN115541270A CN115541270A CN202211083543.5A CN202211083543A CN115541270A CN 115541270 A CN115541270 A CN 115541270A CN 202211083543 A CN202211083543 A CN 202211083543A CN 115541270 A CN115541270 A CN 115541270A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
Abstract
The invention relates to an efficiency test system of aerosol purification equipment under a multi-working condition, which comprises an airflow inlet and an air source, wherein the airflow inlet and the air source are arranged on a main path, the air source is connected with the airflow inlet, the airflow inlet is arranged on the upstream of an airflow dryer, the downstream of the airflow dryer is connected with an electric heater, one side of the electric heater is connected with a humidifier through an air-water separation tank to form air with preset temperature and humidity, test aerosol passes through a bypass injection system and is fully mixed with the air with the preset temperature and humidity of the main path to form aerosol airflow with preset concentration and preset temperature and humidity, aerosol purification equipment to be tested is arranged on the downstream of the aerosol airflow with the preset concentration and temperature and humidity, and the purification efficiency of the equipment is calculated by detecting the aerosol concentration on the upstream and the downstream of the aerosol purification equipment to be tested. By adopting the test system disclosed by the invention, the simulation of working conditions such as wide temperature and humidity range, relative pressure and the like is realized, the efficiency detection of aerosol purification equipment under different design working conditions can be suitable, and the environmental friendliness is high.
Description
Technical Field
The invention belongs to the field of nuclear industry, and particularly relates to an efficiency testing system of an aerosol purification device under a multi-working-condition.
Background
Radioactive aerosols are colloidal dispersions formed by dispersing solid or liquid particles containing radionuclides in air or gas phase environments, and the diameters of the radioactive aerosol particles are approximately between 0.01 and 100 microns. The radioactive aerosol is deposited on the surface of a workplace, so that the radiation dose of personnel can be increased, and in addition, the radioactive aerosol suspended in the air is easily inhaled by people, so that internal irradiation is caused to the workers, and then toxic damage can be generated to internal organs of the human body. As one of the important hazard factors in the working environment of the nuclear energy industry, radioactive aerosol is widely concerned by the industry, and the purification technology of the radioactive aerosol also becomes the research focus in the field of radioactive waste gas treatment.
At present, in the field of nuclear facilities, a high-efficiency filter is mostly adopted as radioactive aerosol purification equipment, and the purification efficiency of the radioactive aerosol purification equipment needs to be detected before leaving a factory, so that the purification efficiency of the purification equipment under corresponding working conditions is verified to meet the design or use requirements.
The existing efficiency test system of the aerosol purification equipment has the problems of single simulation working condition, complex system control, single aerosol dust source and the like, so that the efficiency test system of the aerosol purification equipment under the multi-working condition needs to be developed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an efficiency test system for aerosol purification equipment under multiple working conditions, which can realize the simulation of working conditions such as wide temperature and humidity range, relative pressure and the like, is suitable for the efficiency test of the aerosol purification equipment under different design working conditions, and has high environmental friendliness.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an aerosol clarification plant efficiency test system under multiplex condition, the system sets up in the nitrogen cylinder and the aerosol generator of bypass including setting up in the air current entry and the air source of main road, the air source with the air current entry links to each other, and the air current entry sets up in the air current desicator upper reaches, the air current desicator low reaches link to each other with electric heater, one side of electric heater links to each other through gas-water separation jar and humidifier in order to form the air of predetermineeing the humiture, and experimental aerosol passes through bypass injection system and forms the aerosol air current of predetermineeing the humiture with the air intensive mixing of the predetermined humiture of main road and predetermines the concentration aerosol clarification plant of awaiting measuring in the low reaches of predetermineeing concentration humiture aerosol clarification plant the upstream and downstream of awaiting measuring aerosol clarification plant all sets up the aerosol sample connection, detects through the aerosol concentration of the upstream and downstream aerosol clarification plant, calculates the purification efficiency of equipment according to upstream and downstream aerosol concentration.
Further, the air source is filled with compressed air or ordinary air.
Furthermore, a tail gas purification device is arranged at the tail end of the system, and a fan is arranged between the aerosol purification device to be tested and the tail gas purification device, so that a positive pressure or negative pressure test working condition is realized by using an air source or a tail end fan.
Furthermore, a transmitter is arranged in the system to monitor the detection working condition.
Further, the transmitter includes temperature and humidity transmitter, pressure difference transmitter and flow transmitter.
Furthermore, the airflow dryer is of a layered structure, a plurality of layers of drying agents are arranged inside the airflow dryer, and according to the airflow direction, the coarse silica gel drying agent is filled firstly, and then the fine silica gel drying agent is filled.
Furthermore, the electric heater is a shell-and-tube electric heater, and a plurality of electric heating rods are arranged in the electric heater.
Further, an airflow mixing cavity is arranged at the airflow outlet of the electric heater.
Further, a nitrogen gas cylinder and an aerosol generator which are bypassed are connected with the static neutralization tank to carry out neutralization treatment on the electrified aerosol.
Further, the aerosol generator is one of a dust aerosol generator, a salt mist aerosol generator and an oily aerosol generator.
The invention has the following effects: by adopting the efficiency test system for the aerosol purification equipment under the multi-working-condition, disclosed by the invention, the simulation of working conditions such as wide temperature and humidity range, relative pressure and the like can be realized, the efficiency test system is suitable for the efficiency test of the aerosol purification equipment under different design working conditions, and the environmental friendliness is high.
Drawings
FIG. 1 is a block diagram of an efficiency testing system of an aerosol purification apparatus under a multi-condition according to an embodiment of the present invention;
wherein: the system comprises a nitrogen gas cylinder 1, an aerosol generator 2, a static neutralization tank 3, an electric heater 4, a gas-water separation tank 5, a humidifier 6, a first temperature and humidity transmitter 7, a first pressure transmitter 8, a differential pressure transmitter 9, a second temperature and humidity transmitter 10, a second pressure transmitter 11, an upstream aerosol sampling port 12, an electrically operated valve 13, a downstream aerosol sampling port 14, an electrically operated back pressure valve 15, a fan 16, a tail gas purification device 17, a flow transmitter 18, an airflow dryer 19 and an aerosol purification device to be tested 20.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Example one
As shown in fig. 1, an embodiment of the present invention provides an efficiency testing system for an aerosol purification device under a multi-working condition, where the system includes an airflow inlet, an air source, an airflow dryer 19, an electric heater 4, a humidifier 6, an air-water separation tank 5, a nitrogen cylinder 1, an aerosol generator 2, an electrostatic neutralization tank 3, a first temperature and humidity transmitter 7, a second temperature and humidity transmitter 10, a first pressure transmitter 8, a second pressure transmitter 11, a differential pressure transmitter 9, an electric back pressure valve 15, a fan 16, a tail gas purification device 17, a flow transmitter 18, an electric valve 13, an aerosol purification device to be tested 20, a working condition monitoring system, and related test pipelines.
The system comprises an airflow inlet and an air source which are arranged on a main path, a nitrogen cylinder 1 and an aerosol generator 2 which are arranged on a bypass.
In this embodiment, the air source is connected to the air inlet of the system, the air inlet is arranged at the upstream of the air dryer 19, the downstream of the air dryer 19 is connected to the electric heater 4, and one side of the electric heater 4 is connected to the humidifier 6 through the air-water separation tank 5. The air flow of the dried compressed air entering the system from the air flow inlet can simulate the test working conditions of 20-100 ℃ temperature condition and 5-95% relative humidity condition through the electric heater 4 and the humidifier 6.
The test aerosol is injected into the system by-pass and mixed with the carrier gas thoroughly, an upstream aerosol sampling port 12 is provided upstream of the aerosol purification device 20 to be tested, and a downstream aerosol sampling port 14 is provided downstream of the aerosol purification device 20 to be tested. And detecting the aerosol concentration of the upstream and downstream of the aerosol purification equipment to be detected by using an aerosol measuring instrument, so as to calculate the purification efficiency of the equipment according to the aerosol concentration of the upstream and downstream.
The fan 16 is arranged between the aerosol purification equipment to be tested and the tail gas purification device 17, the system can use compressed air or air as carrier gas for efficiency test, the air source is filled with compressed air or common air, and positive pressure or negative pressure test working conditions can be realized by using the compressed air or the tail end fan 16.
The system can be used for testing the purification efficiency of different types of aerosol purification equipment such as a glass fiber high-efficiency filter, a metal fiber high-efficiency filter, an electrostatic dust collector, a water washing dust collector and the like.
The system monitors the detection working condition through the transmitter, simultaneously designs the PLC control module, and can realize automatic adjustment and stabilization of the detection working condition through controlling the electric valve, the electric heater and the humidifier after the detection working condition is set in the control software.
In the present embodiment, temperature and humidity transmitters (first temperature and humidity transmitter 7 and second temperature and humidity transmitter 10), pressure transmitters (first pressure transmitter 8 and second pressure transmitter 11), a differential pressure transmitter 9, and a flow transmitter 18 are provided in the system.
The main material of system's pipeline, valve, changer is the stainless steel, and the connection between pipeline, valve, instrument is flange joint or welding, can tolerate higher test temperature, test pressure, and system's leakproofness is good.
The airflow dryer 19 is internally of a layered structure, at least 5 layers of drying agents are arranged in the airflow dryer, the filling thickness of each layer of drying agent is 10cm, 1 layer of coarse-pore silica gel drying agent is filled firstly according to the airflow direction, and the rest is fine-pore silica gel drying agent. The drying agent of the coarse-pore silica gel is used for drying the high-humidity gas to remove partial water vapor, and then the fine-pore silica gel is used for further drying, so that the fine-pore silica gel is prevented from being broken due to the impact of the high-humidity gas.
The electric heater 4 is a shell-and-tube electric heater, a plurality of electric heating rods are arranged in the electric heater, and an airflow mixing cavity with the volume of about 20L is arranged at an airflow outlet, so that heated carrier gas and water vapor can be fully mixed in the mixing cavity.
The humidifier 6 generates steam by heating deionized water, the steam passes through the gas-water separator 5 to remove liquid drops in the steam, and the electric regulating valve is used for regulating the quantity of the steam entering the system, so that the relative humidity in the detection process is controlled.
The aerosol generator 2 is connected with the nitrogen bottle 1 to be used as a power air source for generating aerosol, the dust aerosol generator, the salt mist aerosol generator and the oily aerosol generator can be used to realize the generation of different types of aerosol, and the electrostatic neutralization tank 3 is used for carrying out electric neutralization treatment on the electrified aerosol for the aerosol which is easy to generate electrostatic accumulation.
The ion wind generating device is arranged in the static neutralizing tank 3, and can generate ion wind with different electrical property from the aerosol, thereby removing most of static carried by the aerosol.
The static neutralization tank 3 is also connected with an air source, so that the dilution of the aerosol and the generation of stable low-concentration aerosol are realized, and the injection pressure of the aerosol can also be increased through the air source.
The temperature and humidity transmitter, the pressure transmitter, the differential pressure transmitter and the flow transmitter can transmit the measured values to the control software through electric signals, so that the detection conditions can be remotely monitored.
The test pipeline of connecting the device under test possesses the adapter of multiple difference and installation box, applicable most aerosol clarification plant who uses in engineering at present.
The upper and lower streams of the device to be detected are provided with quick connectors which can be connected with an aerosol detection device or an aerosol sampling device to realize the online detection or sampling of the aerosol concentration.
The tail gas treatment device 17 can purify aerosol generated by testing, and the safety of testing personnel and the environmental safety are protected.
According to the embodiment, the efficiency test system for the aerosol purification equipment under the multi-working-condition comprises the airflow inlet and the air source which are arranged on a main path, the air source is connected with the airflow inlet, the airflow inlet is arranged on the upstream of the airflow dryer, the downstream of the airflow dryer is connected with the electric heater, one side of the electric heater is connected with the humidifier through the air-water separation tank to form air with preset temperature and humidity, the test aerosol passes through the bypass injection system and is fully mixed with the air with the preset temperature and humidity of the main path to form aerosol airflow with preset concentration and preset temperature and humidity, the aerosol purification equipment to be tested is arranged on the downstream of the aerosol airflow with the preset concentration and temperature and humidity, and the purification efficiency of the equipment is calculated by detecting the aerosol concentration on the upstream and the downstream of the aerosol purification equipment to be tested. By adopting the test system disclosed by the invention and adopting a modular design, the simulation of working conditions such as wide temperature and humidity, relative pressure and the like can be realized, the system is suitable for the efficiency detection of aerosol purification equipment under different design working conditions, and the tail gas purification device is arranged, so that the environment friendliness is high.
The system according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (10)
1. The utility model provides an aerosol clarification plant efficiency test system under multiplex condition which characterized in that: the system sets up in the nitrogen cylinder and the aerosol generator of bypass including setting up in the air current entry and the air source of main road, the air source with air current entry links to each other, and air current entry sets up in the air flow dryer upper reaches, air flow dryer low reaches link to each other with electric heater, one side of electric heater links to each other through gas-water separation jar and humidifier in order to form the air of predetermineeing the humiture, and experimental aerosol passes through bypass injection system and forms the aerosol air flow of predetermineeing the humiture with the air intensive mixing of the predetermined humiture of main road predetermineeing the concentration and predetermine the downstream of humiture aerosol air flow and set up the examination aerosol clarification plant that awaits measuring, through detecting the aerosol concentration of awaiting measuring examination aerosol clarification plant upper and lower reaches, calculates the purification efficiency of equipment according to the aerosol concentration of up-down stream.
2. The system for testing the efficiency of the aerosol purification equipment under the multi-working-condition of claim 1, wherein: the air source is filled with compressed air or ordinary air.
3. The system for testing the efficiency of the aerosol purification equipment under the multi-working-condition as claimed in claim 2, wherein: the tail end of the system is provided with a tail gas purifying device, and a fan is arranged between the aerosol purifying device to be tested and the tail gas purifying device so as to realize the testing working condition of positive pressure or negative pressure by using an air source or a tail end fan.
4. The system for testing the efficiency of the aerosol purification equipment under the multi-working-condition of claim 3, wherein: and a transmitter is arranged in the system to monitor the detection working condition.
5. The system for testing the efficiency of the aerosol purification equipment under the multi-working-condition of claim 4, wherein: the transmitter comprises a temperature and humidity transmitter, a pressure difference transmitter and a flow transmitter.
6. The system for testing the efficiency of the aerosol purification equipment under the multi-working-condition according to claim 5, wherein: the airflow dryer is internally of a layered structure, a plurality of layers of drying agents are arranged in the airflow dryer, and according to the airflow direction, the coarse silica gel drying agent is filled firstly, and then the fine silica gel drying agent is filled.
7. The system for testing the efficiency of the aerosol purification equipment under the multi-working-condition of claim 6, wherein: the electric heater is a shell-and-tube electric heater, and a plurality of electric heating rods are arranged in the electric heater.
8. The system for testing the efficiency of the aerosol purification equipment under the multi-condition of claim 7, wherein: and an airflow mixing cavity is arranged at the airflow outlet of the electric heater.
9. The system for testing the efficiency of the aerosol purification equipment under the multi-condition of claim 8, wherein: the bypass nitrogen cylinder and the aerosol generator are connected with the static neutralization tank to carry out neutralization treatment on the electrified aerosol.
10. The system for testing the efficiency of the aerosol purification device under the multi-condition of claim 9, wherein: the aerosol generator is one of a dust aerosol generator, a salt mist aerosol generator and an oily aerosol generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211083543.5A CN115541270A (en) | 2022-09-06 | 2022-09-06 | System for testing efficiency of aerosol purification equipment under multi-working-condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211083543.5A CN115541270A (en) | 2022-09-06 | 2022-09-06 | System for testing efficiency of aerosol purification equipment under multi-working-condition |
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| Publication Number | Publication Date |
|---|---|
| CN115541270A true CN115541270A (en) | 2022-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211083543.5A Pending CN115541270A (en) | 2022-09-06 | 2022-09-06 | System for testing efficiency of aerosol purification equipment under multi-working-condition |
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|---|---|
| CN (1) | CN115541270A (en) |
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2022
- 2022-09-06 CN CN202211083543.5A patent/CN115541270A/en active Pending
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