CN103900842B - A kind of self-priming venturi water scrubber performance test system - Google Patents

Abstract

The invention relates to a performance experiment system of a self-priming Venturi water washer, which includes a self-priming Venturi water washer and a data acquisition system, and is characterized in that it also includes an air supply circuit, a steam supply circuit, a gas mixing and distribution circuit, and an inlet sampling system. section, self-priming Venturi water scrubber ejection characteristic measurement circuit, outlet sampling section, the outlet of the air supply circuit and the outlet of the steam supply circuit merge and then connect to the inlet of the gas mixing distribution circuit, and the outlet of the gas mixing distribution circuit connects to the inlet sampling section , the outlet of the inlet sampling section is connected to the self-priming Venturi water washer, and the self-priming Venturi water washer is externally connected to the injection characteristic measurement circuit.

Description

A self-priming Venturi scrubber performance test system

technical field

The invention relates to a performance experiment system of a self-priming venturi water washer.

Background technique

When a severe reactor core melt accident occurs, a large amount of radioactive substances will be released into the containment, causing the pressure inside the containment to rise. The method is to wash and filter the gas in the containment and discharge it into the environment, so as to prevent the overpressure of the containment and reduce the release of radioactive substances into the environment as much as possible. The safety of the next nuclear power plant is of paramount importance.

Due to the advantages of simple structure and high filtration efficiency, Venturi water scrubber has gradually attracted people's attention in the design of containment filtration and discharge system of nuclear power plants in recent years, and has been applied to a certain extent. However, due to the passive safety requirements of nuclear power, the Venturi scrubber, which is currently more maturely used in the general industrial field, cannot be used in the containment filtration and discharge system, and a self-priming Venturi scrubber with a special design is required. This self-priming Venturi water scrubber should be able to effectively filter radioactive aerosols, iodine and methyl iodide in containment exhaust without external power. Due to the special nature of nuclear power, when a serious accident occurs in a nuclear power plant, the release of a large amount of radioactive substances will threaten the living environment of human beings. Therefore, in the event of a serious accident, the filtration efficiency of radioactive substances in the discharge system becomes the verification system reliability and safety. so that any set of Venturi scrubbers or other filtering devices applied to the containment filtration and drainage system must pass strict tests, but the reliability of the equipment cannot be tested in actual severe accidents, for Therefore, a system that can simulate the high-temperature, high-pressure, and high-humidity atmospheric environment in the containment under various accident conditions is needed. This system is used to test the performance of the self-priming Venturi scrubber. At present, there is no published literature at home and abroad. Mention the experimental system that can be used to test the performance of self-priming venturi scrubbers.

Contents of the invention

The purpose of the present invention is to provide a self-priming Venturi water scrubber performance experiment system, which can simulate the atmospheric environment in the containment under various accident conditions and effectively test the performance of the self-priming Venturi water scrubber.

The technical scheme that realizes the object of the present invention:

A performance experiment system of a self-priming Venturi water scrubber, including a self-priming Venturi water scrubber and a data acquisition system, characterized in that it also includes an air supply circuit, a steam supply circuit, a gas mixing and distribution circuit, an inlet sampling section, a self- Suction Venturi water scrubber ejection characteristics measurement circuit, outlet sampling section, the outlet of the air supply circuit and the outlet of the steam supply circuit merge and then connect to the inlet of the gas mixing distribution circuit, the outlet of the gas mixing distribution circuit connects to the inlet sampling section, and the inlet sampling The outlet of the section is connected to the self-priming Venturi water washer, and the self-priming Venturi water washer is externally connected to the injection characteristic measurement circuit.

The gas mixing and distribution circuit includes a gas mixing and distribution pipeline (65) and a mixing tank (32). The gas mixing and distribution pipeline (65) is connected to the inlet of the mixing tank (32). The distribution mouthpieces (31) are respectively used to distribute iodine, organic iodine, and aerosol, and the ends of the distribution mouthpieces (31) are located in the gas mixing distribution pipeline (65).

The self-priming Venturi water washer injection characteristic measurement circuit includes a water pump (51), a balance water tank (54), the inlet of the water pump (51) is connected to the self-priming Venturi water washer (37), and the outlet of the water pump (51) passes through the pipe The road (64) is connected to the balance water tank (54), and the pipeline (64) is provided with a regulating valve (52), a turbine flowmeter (53), and the balance water tank (54) is connected to the self-priming Venturi through the water supply pipeline (56) The water supply tank (40) at the throat of the pipe (38), the upper part of the balance water tank communicates with the upper part of the self-priming Venturi water washer (37) through the bridge pipe (55); the balance water tank is provided with a liquid level gauge (58), and the Venturi The water washer is provided with a liquid level gauge (57).

Also be provided with metal fiber filter (43), the outlet on the top of self-priming Venturi water scrubber (37) connects the inlet of metal fiber filter (43) through three-way valve (41), and the other of three-way valve (41) One interface is connected with the outlet main pipe (66), and the outlet of the metal fiber filter (43) is connected with the outlet main pipe (66) through the stop valve (44); the outlet sampling section includes 3 outlet sampling interface pipes (46), 3 The outlet sampling mouthpieces (46) are respectively used for sampling iodine, organic iodine, and aerosol, and the ends of the outlet sampling mouthpieces (46) are located in the outer end of the outlet main pipe (66).

The outlet of the mixing tank (32) is connected to the inlet of the self-priming Venturi water scrubber (37) through an inverted U-shaped pipeline (47); the inlet sampling section includes 3 inlet sampling interface pipes (33), and 3 inlet sampling interface pipes (33) are respectively used for sampling iodine, organic iodine, and aerosol, and the end of the inlet sampling mouthpiece (33) is located in the inlet end of the inverted U-shaped pipeline (47).

The structure of the air supply circuit is that the air compressor (1), air storage tank (4), filter (7), and air preheater (18) are connected in sequence, and the outlet of the air preheater (18) is connected to the gas mixing distribution pipe The filter (7) is equipped with a 3-stage filter unit, and the connecting pipeline between the filter (7) and the air preheater (18) is 3 parallel air supply pipelines, and 3 supply pipelines Airline tubing diameters vary.

The structure of the steam supply circuit is that the boiler (19) is connected to the steam superheater (29), and the outlet of the steam superheater (29) is connected with the gas mixing and distribution pipeline (65); the connection between the boiler (19) and the steam superheater (29) The connecting pipelines are two parallel gas supply pipelines, and the diameters of the two gas supply pipelines are different.

The end of the distribution interface pipe (31) is an elbow, and the bending direction is the same as the gas flow direction; the end of the inlet sampling interface pipe (33) is an elbow, and the bending direction is opposite to the gas flow direction.

There are 2 partitions (62) and 1 orifice plate (63) inside the mixing tank (32), the 2 partitions (62) are arranged alternately up and down, and the 2 partitions (62) are located below the orifice (63) .

The return port at the bottom of the metal fiber filter (43) is connected to the self-priming Venturi water washer (37) through the return valve (45); the self-priming Venturi water washer (37) and the metal fiber filter (43) adopt flanges The way is connected with the external pipeline.

The beneficial effect that the present invention has:

The invention includes an air supply circuit, a steam supply circuit, a gas mixing and distribution circuit, an inlet sampling section, a self-priming Venturi water scrubber ejection characteristic measurement circuit, an outlet sampling section, after the outlet of the air supply circuit and the outlet of the steam supply circuit merge It is connected to the inlet of the gas mixing distribution circuit, the outlet of the gas mixing distribution circuit is connected to the inlet sampling section, the outlet of the inlet sampling section is connected to the self-priming Venturi water washer, and the self-priming Venturi water washer is externally connected to the injection characteristic measurement circuit. The invention can simulate the atmospheric environment in the containment under various accident conditions, and effectively test the filtering performance and ejection characteristics of the self-priming Venturi water scrubber.

The gas mixing distribution circuit of the present invention is provided with 3 distribution interface pipes (31), and the 3 distribution interface pipes (31) are respectively used to distribute iodine, organic iodine, and aerosol, which can simulate iodine and organic iodine in the containment under accident conditions , Aerosol environment, the mixing tank of the gas mixing and distribution circuit can ensure the sufficient mixing of the distribution materials, change the distribution materials, and simulate other atmospheric environments in the containment under accident conditions.

The injection volume is an important parameter to measure the injection performance of the self-priming Venturi scrubber, and it is also an important parameter to measure the filtration performance of the scrubber. Through the injection characteristic measurement circuit of the self-priming Venturi water washer of the present invention, the indirect measurement of the liquid absorption (injection amount) can be realized, and no flow meter, etc. need to be installed on the water supply pipeline (56) of the self-priming Venturi water washer The resistance part, the liquid absorption value is obtained through the balance between the liquid absorption volume and the pump flow rate, that is, the liquid absorption volume is measured by the turbine flowmeter (53) on the outlet pipeline (64) of the water pump (51), which effectively guarantees the liquid absorption volume The authenticity of the measurement. Through the self-priming Venturi water scrubber injection characteristic measurement circuit of the present invention, the accurate measurement of the injection volume of the self-priming Venturi water scrubber can be completed, including the measurement of the injection volume under different submerged depths of the throat and different flow velocities of the throat , but also carry out experimental research on the ejection characteristics and resistance characteristics of Venturi scrubbers with different structures.

The metal fiber filter (43) of the present invention is connected to the self-priming Venturi water scrubber (37) through a three-way valve (41), and the valve position of the three-way valve (41) is changed to change the direction of the gas, so that the self-priming Venturi water scrubber (37) can be completed. Filtration performance test of Li water washer alone or performance test of Venturi water washer and metal fiber filter in series.

The present invention can meet the mixed gas supply requirements under different ratios of air and steam, and can change the temperature of the mixed gas by adjusting the heating power of the steam superheater (29) and the air preheater (18), simulating in a wide range Atmospheric environment inside containment under accident conditions. The air supply circuit and the steam supply circuit of the present invention have multiple supply pipelines with different diameters respectively, which can ensure accurate measurement of steam flow and air flow, and meet the ratio requirements of different flow rates of air and steam at the same time, and the measurement accuracy can reach 0.5 grade.

The outlet of the mixing tank (32) of the present invention is connected to the inlet of the self-priming Venturi water washer (37) through an inverted U-shaped pipeline (47), which can effectively prevent the chemical solution in the self-priming Venturi water washer from flowing back into the air and Steam supply circuit; the mixing tank (32) is provided with 2 partitions (62) and 1 orifice (63), which can ensure the full mixing of the distributed material and the gas. The end of the distribution mouthpiece (31) of the present invention is an elbow, and the bending direction is the same as the gas flow direction; the end of the inlet sampling mouthpiece (33) is an elbow, and the bending direction is opposite to the gas flow direction, which is more conducive to the distribution of substances ,sampling. The bottom of the metal fiber filter (43) is equipped with a backflow valve (45), and the backflow valve (45) can ensure that the moisture remaining in the metal fiber filter flows back smoothly into the water washer. The self-priming Venturi water washer (37) and the metal fiber filter (43) of the present invention are connected to the external pipeline by means of flanges, which facilitates the replacement of filtering equipment.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Figure 2 is a partial enlarged view of the distribution interface area;

Fig. 3 is a partial enlarged view of the mixing tank area;

Figure 4 is a partial enlarged view of the region of the inlet sampling section;

Fig. 5 is a partial enlarged view of the injection characteristic measurement circuit of the self-priming Venturi scrubber.

detailed description

As shown in Figure 1, the experimental system consists of a self-priming Venturi water washer, an air supply circuit, a steam supply circuit, a gas mixing distribution circuit, an inlet sampling section, a self-priming Venturi water washer injection characteristic measurement circuit, and an outlet sampling section. and the corresponding data acquisition system, the outlet of the air supply circuit and the outlet of the steam supply circuit are connected to the inlet of the gas mixing distribution circuit, the outlet of the gas mixing distribution circuit is connected to the inlet sampling section, and the outlet of the inlet sampling section is connected to the self-priming Venturi Li water washer, self-priming Venturi water washer is externally connected to the injection characteristic measurement circuit.

As shown in Figure 1, the air supply circuit is composed of an air compressor 1, an air storage tank 4, a filter 7, and an air preheater 18 connected in sequence. The air compressor 1 is connected to the check valve 3 through the expansion joint 2, and the check valve The other end of the valve 3 is connected to the inlet of the gas storage tank 4, the upper part of the gas storage tank 4 has a safety valve 6, and the lower part is equipped with a steam trap 5, the outlet of the gas storage tank 4 is connected to the filter 7, and the outlet of the filter 7 is connected to the pressure reducing valve 8. The decompression valve is connected with DN25, DN50, DN80 three parallel gas supply pipelines of different diameters, and each gas supply pipeline is equipped with corresponding cut-off valves 9, 12, 15, mass flow meters 10, 13, 16 and regulators. The valves 11, 14, 17 and the three air supply pipelines are finally merged into one pipeline and connected to the air preheater 18. The outlet of the air preheater 18 is in communication with the gas mixing and distribution pipeline 65 (that is, the outlet of the air supply circuit is connected to the inlet of the gas mixing and distribution circuit). Wherein the function of the expansion joint 2 is to reduce the vibration, and the check valve 3 can prevent the air from flowing back to the air compressor 1 . The filter 7 is equipped with a three-stage filter unit, and its filtration precision is 3 μm, 1 μm and 0.01 μm respectively. Three filters with different precision can remove solid particles and fine oil droplets carried in the gas, so as to ensure the purity of the air and avoid During the aerosol measurement process, the accuracy of aerosol filtration efficiency is affected by the solid particles carried in the gas. The pressure reducing valve 8 can adjust the air pressure to meet the demand of air under different pressure conditions. The three air supply lines with different pipe diameters can work independently according to needs, so as to adjust the air flow in a wide range. The air preheater 18 can heat the air to meet the demand for air under different temperature conditions. At the same time, the pipeline behind the air preheater is wrapped with thermal insulation material to prevent heat loss. The air supply circuit provides air with various pressures, temperatures, and flows to simulate the air environment in the containment under various conditions.

As shown in Figure 1, the steam supply circuit includes a boiler 19 and a steam superheater 29, the boiler 19 is connected to a regulating valve 21 through a shut-off valve 20, the other end of the regulating valve 21 is connected to a pressure reducing valve 22, and the other end of the pressure reducing valve 22 is connected to a DN50 and DN80 are two parallel steam supply pipelines with different pipe diameters, and the steam supply pipelines are equipped with corresponding stop valves 23, 26, mass flow meters 24, 27, regulating valves 25, 28, and two steam supply pipelines The outlet of the steam superheater 29 is connected to the inlet of the steam superheater 29, and the outlet of the steam superheater 29 is merged with the outlet of the air preheater 18 to form a pipeline (that is, the outlet of the air supply circuit and the outlet of the steam supply circuit converge). The outlet of the steam superheater 29 is in communication with the gas mixing and distribution pipeline 65 (that is, the outlet of the steam supply circuit is connected to the inlet of the gas mixing and distribution circuit). The steam superheater 29 is used to generate slightly superheated steam to remove the liquid droplets entrained in the saturated steam produced by the boiler, and at the same time ensure that the steam does not condense after being mixed with air, so as to avoid the condensate from causing damage to the aerosol, iodine and methyl iodide sampling process. Impact. The pressure reducing valve 22 is used to adjust the steam pressure. The steam supply pipelines of the above two different pipe diameters can be operated independently to meet the needs of different steam flow rates. The steam superheater 29 is used to further heat the steam to make the steam produced by the boiler The steam is slightly superheated to ensure that the steam does not condense when mixed with air. The circuit also has steam traps 48 and 49, which are used to discharge the condensed water produced by steam condensation when the pipeline is preheated, and meanwhile the whole system is wrapped with thermal insulation material to prevent heat loss. The steam supply circuit provides steam with various pressures, temperatures, and flow rates to simulate the steam environment in the containment under various conditions.

As shown in Figure 1, the gas mixing and distribution circuit includes a gas mixing and distribution pipeline 65 and a mixing tank 32, and the gas mixing and distribution pipeline 65 is connected to the inlet of the mixing tank 32, and Figure 2 is a partial enlarged view of the distribution interface area 59, as shown in Figure 2 As shown, there are 3 distribution mouthpieces 31, and the 3 distribution mouthpieces 31 are respectively used for distributing iodine, organic iodine, and aerosol. The end is an elbow, and the bending direction is the same as the gas flow direction. The gas mixing distribution pipeline 65 is provided with a check valve 30 to prevent the distribution material from flowing into the steam and air supply circuits, and prevent the distribution material from damaging the instruments on the two supply circuits. Fig. 3 is the partially enlarged view of mixing tank area 61, as shown in Figure 3, is provided with 2 partitions 62 and 1 orifice 63 in the mixing tank 32, and 2 partitions 62 are alternately arranged up and down, and 2 partitions 62 Located under the orifice 63, the partition 62 is used to change the flow direction of the airflow after entering the mixing tank, so that the distribution material and the gas are fully mixed to ensure the uniform mixing of the gas and the distribution material, and finally through the flow equalization effect of the orifice 63 Leave the mixing tank 32. The gas mixing and distribution circuit can simulate the iodine, methyl iodide, and aerosol environment in the containment under accident conditions, and is used for testing the filtration performance of self-priming Venturi scrubbers and metal fiber filters.

As shown in Figure 1, the outlet of the mixing tank 32 is connected to the inlet of the self-priming Venturi water scrubber 37 through an inverted U-shaped pipeline 47; Figure 4 is a partial enlarged view of the inlet sampling section area 60, as shown in Figure 4, the inlet The sampling section includes 3 inlet sampling mouthpieces 33. The 3 inlet sampling mouthpieces 33 are used for sampling iodine, organic iodine and aerosol respectively. The end of the inlet sampling mouthpiece 33 is located in the inlet end of the inverted U-shaped pipeline. The end of the sampling mouthpiece 33 is an elbow, and the bending direction is opposite to the gas flow direction. As shown in FIG. 1 , a check valve 34 , an expansion joint 35 and a stop valve 36 are also provided on the inverted U-shaped pipeline 47 . Inverted U-shaped water seal pipe 47 can play an isolation role, and the top of the inverted U-shaped is higher than twice the liquid level in the self-priming Venturi water washer 37 to prevent the backflow of the chemical solution in the self-priming Venturi water washer 37 Enter the mixing tank 32 and the steam and air supply circuit to avoid corrosion and damage to the measuring instruments by the chemical solution.

As shown in Figure 1, a metal fiber filter 43 is also provided, and the outlet at the top of the self-priming Venturi water scrubber 37 is connected to the inlet of the metal fiber filter 43 through a three-way valve 41, and another interface of the three-way valve 41 is connected to the outlet. The main pipe 66 is connected, and the outlet of the metal fiber filter 43 is connected with the outlet main pipe 66 through the shut-off valve 44; The outlet sampling section includes three outlet sampling mouthpieces 46, which are respectively used for sampling iodine, organic iodine, and aerosol. The end of the outlet sampling mouthpiece 46 is located in the outer end of the outlet main pipe 66. The metal fiber filter 43 is also externally connected with stop valves 42 , 44 . The three-way valve 41 has two functions, the first function is to isolate the metal fiber filter 43 when verifying the self-priming Venturi water scrubber 37 self-removal ability alone, and the second function is to ensure the self-priming venturi water washer 37 when verifying the overall performance of the equipment. Suction venturi scrubber 37 and metal fiber filter 43 run in series. The self-priming Venturi water washer 37 and the metal fiber filter 43 adopt the flange method and the external pipeline, which can be easily disassembled; Just put it into the experimental circuit, that is, the flange connection method can facilitate the replacement of filter equipment.

Fig. 5 is a partially enlarged view of the injection characteristic measurement circuit part 39 of the self-priming Venturi water washer, as shown in Fig. The inlet of the pump is connected to the self-priming Venturi water scrubber 37, and the outlet of the water pump 51 is connected to the balance water tank 54 through the pipeline 64. The pipeline 64 is provided with a regulating valve 52 and a turbine flowmeter 53, and the balance water tank 54 is connected to the The water supply tank 40 at the throat of the suction venturi tube 38, wherein the function of the water supply tank 40 is to ensure that the water supply can be evenly distributed to each small hole in the throat, and the upper part of the balance water tank passes through the bridge pipe 55 and the self-priming Venturi water washer 37 The upper part of the venturi is connected so that the air space pressures of the two are equal, thereby ensuring the same internal and external back pressure of the Venturi throat; the balance water tank is provided with a liquid level gauge 58, and the Venturi water scrubber is provided with a liquid level gauge 57, which are respectively used to observe the balance water tank and the venturi throat. Fluid level of the Venturi scrubber. The flow rate of the water supply pipeline 56 is the ejection volume of Venturi. However, if a valve or a flow meter is added to the water supply pipeline 56, although the injection volume can be obtained directly, the flow resistance of the water supply pipeline 56 will increase. Thereby affecting the authenticity of the ejection amount measurement, therefore, no valves and flowmeters are set on the water supply pipeline 56, and the ejection amount of Venturi is measured indirectly. During normal experiment, keep the initial liquid level of self-priming Venturi water washer 37 and balance water tank 54 the same, if regulating valve 52 and water pump 51 are closed, then the water in the balance water tank 54 is due to the suction of self-priming Venturi tube 38 In order to keep the liquid level of the balance water tank 54 constant, start the pump 51 and adjust the flow of water entering the balance water tank 54 through the regulating valve 52. When the liquid level of the balance water tank 54 remains unchanged And when the liquid level of the self-priming Venturi water washer 37 is the same, it means that the amount of water added to the balance water tank 54 by the water pump 51 is just the same as the water flow entering the self-priming Venturi pipe 38 through the water supply pipeline 56, That is to say, the reading of the turbine flowmeter 53 is the ejection amount of the self-priming Venturi pipe 38, and changing the liquid level in the self-priming Venturi scrubber 37 can measure the ejection of the venturi under different submerged conditions of the throat. quantity. In order to reduce the flow resistance, the pipeline adopts a large-diameter pipe, and the pipe length should be as short as possible.

The data acquisition system of the present invention includes corresponding measuring instruments for temperature, pressure and flow, a data acquisition board, a computer and wires connecting the measuring instruments with the data acquisition board, etc., which is prior art. During the experiment, each measuring instrument converts the corresponding temperature, pressure and flow signals into electrical signals, and transmits them to the data acquisition board. The data acquisition board receives and records the corresponding signals, and converts the electrical signals into temperature, pressure and flow rates. The actual value of the flow rate is displayed on the computer screen.

Claims (9)

1. a self-priming venturi water scrubber performance test system, including self-priming venturi water scrubber (37), data collecting system, also include air supply loop, steam supply loop, gas mixing dispensing loop, import sampling section, self-priming venturi water scrubber injection feature measurement loop, outlet sampling section, the outlet of air supply loop and the outlet in steam supply loop converge the import being followed by gas mixing dispensing loop, the outlet in gas mixing dispensing loop taps into mouth sampling section, the outlet of import sampling section connects self-priming venturi water scrubber, self-priming venturi water scrubber external injection feature measurement loop；It is characterized in that: self-priming venturi water scrubber injection feature measurement loop includes water pump (51), balanced reservoir (54), the import of water pump (51) connects self-priming venturi water scrubber (37), the outlet of water pump (51) connects balanced reservoir (54) by pipeline (64), pipeline (64) is provided with adjustment valve (52), turbine flowmeter (53), balanced reservoir (54) connects the feed trough (40) of self-priming Venturi tube (38) throat by supply line (56), the top of balanced reservoir is connected with the top of self-priming venturi water scrubber (37) by bridge tube (55)；Balanced reservoir is provided with liquidometer (58), and venturi water scrubber is provided with liquidometer (57).

2. self-priming venturi water scrubber performance test system according to claim 1, it is characterized in that: gas mixing dispensing loop includes gas mixing dispensing pipeline (65), blending tank (32), gas mixing dispensing pipeline (65) connects the import of blending tank (32), it is provided with 3 dispensings mouthpiece (31), 3 dispensings mouthpiece (31) are respectively used to dispensing iodine, organic iodine, aerosol, and the end of dispensing mouthpiece (31) is positioned at gas mixing dispensing pipeline (65).

3. self-priming venturi water scrubber performance test system according to claim 2, it is characterized in that: be additionally provided with metal fiber filter (43), the outlet at self-priming venturi water scrubber (37) top connects the import of metal fiber filter (43) by three-way valve (41), another interface of three-way valve (41) is connected with outlet header (66), and the outlet of metal fiber filter (43) is connected with outlet header (66) through stop valve (44)；Outlet sampling section includes 3 outlets sample connection pipe (46), 3 outlets sample connection pipe (46) are respectively used to sampling iodine, organic iodine, aerosol, and the end of outlet sample connection pipe (46) is positioned at the outer end of outlet header (66).

4. self-priming venturi water scrubber performance test system according to claim 3, it is characterised in that: the outlet of blending tank (32) connects the import of self-priming venturi water scrubber (37) through inverted U-shaped pipeline (47)；Import sampling section includes 3 imports sample connection pipe (33), 3 imports sample connection pipe (33) are respectively used to sampling iodine, organic iodine, aerosol, and the end of import sample connection pipe (33) is positioned at the inlet end of inverted U-shaped pipeline (47).

5. self-priming venturi water scrubber performance test system according to claim 4, it is characterized in that: air supply loop structure is, air compressor machine (1), air accumulator (4), filter (7), air preheater (18) are sequentially connected with, and the outlet of air preheater (18) is connected with gas mixing dispensing pipeline (65)；Filter (7) is provided with 3 grades of filter elements, and the connecting line between filter (7) with air preheater (18) is 3 supply air lines in parallel, and 3 supply air line calibers are different.

6. self-priming venturi water scrubber performance test system according to claim 5, it is characterized in that: steam supply loop structure is, boiler (19) connects steam superheater (29), and the outlet of steam superheater (29) is connected with gas mixing dispensing pipeline (65)；Connecting line between boiler (19) with steam superheater (29) is 2 supply air lines in parallel, and 2 supply air line calibers differ.

7. self-priming venturi water scrubber performance test system according to claim 6, it is characterised in that: dispensing mouthpiece (31) end is bend pipe, and bending direction is identical with gas flow direction；The end of import sample connection pipe (33) is bend pipe, and bending direction is contrary with gas flow direction.

8. self-priming venturi water scrubber performance test system according to claim 7, it is characterized in that: in blending tank (32), be provided with 2 dividing plates (62) and 1 orifice plate (63), 2 dividing plates (62) are crisscross arranged up and down, and 2 dividing plates (62) are positioned at the lower section of orifice plate (63).

9. self-priming venturi water scrubber performance test system according to claim 8, it is characterised in that: the refluxing opening of metal fiber filter (43) bottom connects self-priming venturi water scrubber (37) through reflux inlet (45)；Self-priming venturi water scrubber (37) adopts flange method to be connected with external pipeline with metal fiber filter (43).