CN210021676U - Leaching device and UF6 gas leakage accident emergency processing system - Google Patents
Leaching device and UF6 gas leakage accident emergency processing system Download PDFInfo
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- CN210021676U CN210021676U CN201920754709.9U CN201920754709U CN210021676U CN 210021676 U CN210021676 U CN 210021676U CN 201920754709 U CN201920754709 U CN 201920754709U CN 210021676 U CN210021676 U CN 210021676U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The utility model provides a drip washing device, it includes: the circulating liquid chamber, the circulating pump and the pipeline connected with the circulating liquid chamber and the circulating pump; the top of the circulating liquid chamber is provided with a water inlet and at least one sprayer, the middle upper part is provided with an air inlet and an air outlet, the bottom is provided with a liquid outlet, and the water inlet is used for injecting leacheate in advance; the input end of the circulating pump is connected with the liquid outlet through a pipeline, and the output end of the circulating pump is connected with the water inlet end of each sprayer through a pipeline. Accordingly, providing a UF6The gas leakage accident emergency treatment system can monitor UF in time6UF leaking to gasification hall and giving alarm signal6The gas is absorbed and treated, the purification efficiency is high, the content of radioactive substances in the tail gas is low, and the safety of personnel, equipment and environment under the accident working condition is effectively ensured.
Description
Technical Field
The utility model relates to a nuclear fuel circulation technical field, concretely relates to drip washing device to and UF6Gas leakage accident emergency treatment system.
Background
With the development of nuclear industry, especially the rapid development of nuclear power industry, the requirements on nuclear fuel production technology are higher and higher. At present, the nuclear fuel elements of pressurized water reactors, high temperature gas cooled reactors, research reactors and other reactor types in China are all solid UF6(the triple point is about 64 ℃) as a raw material, and qualified ceramic UO is prepared by chemical conversion2。
With UF6Preparation of ceramic UO as raw material2Solid UF is essential6Heating for vaporization when UF6Heating to a certain temperature and pressure, opening the supply valve, and delivering UF to the next step via pipeline6A gas. However, UF is present during transport using pipelines6Risk of leakage, and leaked UF once a line leak occurs6The gas will immediately diffuse to the working environment due to UF6Has extremely strong chemical toxicity and radiation hazard, so emergency treatment measures must be taken.
For UF6Pipeline leakage accidents currently rely primarily on UF6And a natural sedimentation and accident exhaust purification system is used as an emergency treatment measure. UF of duct leaks6Directly releasing gas into the plant, naturally settling part of the gas, attaching to equipment or ground, introducing the rest part of the gas into an accident exhaust system, and purifying UF by an acid mist purification tower6And (5) carrying out absorption treatment. The entire system lacks effective accident interlock control measures, and at the same time, UF6The material is difficult to recover, the absorption efficiency is low, and critical safety risk exists.
SUMMERY OF THE UTILITY MODEL
The present invention has been made to solve, at least in part, the technical problems occurring in the prior art.
Solve the utility model discloses the technical scheme that technical problem adopted is:
the utility model provides a drip washing device, it includes: the circulating liquid chamber, the circulating pump and the pipeline connected with the circulating liquid chamber and the circulating pump; the top of the circulating liquid chamber is provided with a water inlet and at least one sprayer, the middle upper part of the circulating liquid chamber is provided with an air inlet and an air outlet, and the bottom of the circulating liquid chamber is provided with a liquid outlet, wherein the water inlet is used for injecting leacheate (such as deionized water) or injecting the leacheate in advance; the input end of the circulating pump is connected with the liquid outlet through a pipeline, and the output end of the circulating pump is connected with the water inlet end of each sprayer through a pipeline.
Optionally, each sprayer is communicated with one spraying pipe through a corresponding straight pipe; the bottom of the spray pipe is provided with a plurality of spray holes.
Optionally, the spray holes are arranged at equal intervals along the length direction of the spray pipe; the spray holes are circular spray holes with the diameter of 2-4 mm.
Optionally, the exhaust port is slightly higher than the intake port.
Optionally, the number of the sprayers can be multiple, and is preferably 2-4.
Optionally, the circulating liquid chamber adopts a plate type cavity structure.
Optionally, the washing device comprises two circulating liquid chambers which are symmetrically arranged; the two circulating liquid chambers share an air inlet and an air outlet.
Alternatively, the connecting passages between the exhaust port and the two circulating liquid chambers, respectively, are provided with a predetermined gradient.
Optionally, the lower parts of the two circulating liquid chambers are communicated through at least one pipeline.
The utility model also provides a UF6Gas leakage accident emergency treatment system, it includes: the gas monitoring and alarming device, the control device and the leaching device; the air inlet of the leaching device and UF6The pipeline of the emergency exhaust system is connected; the gas monitoring and alarming device is used for monitoring whether UF occurs in the gasification hall in real time6Gas leakage is monitored, and an alarm signal is output to the control device when the gas leakage is monitored; the control device is used for starting UF in an interlocking manner after receiving the alarm signal6An emergency exhaust system for accidents and the leaching device.
Optionally, the control device is further used for interlocking and closing a normal air supply and exhaust system in the gasification hall and closing UF after receiving the alarm signal6On the pipelineValves and vaporizer heating means, and start UF6Emergent exhaust system of accident.
Optionally, the gas monitoring and alarming device comprises an HF monitoring and alarming unit and a video monitoring and alarming unit.
Optionally, an adjusting valve is arranged on a pipeline where the circulating pump in the leaching device is located; the system also comprises a liquid level monitoring alarm device, wherein a liquid level threshold value is preset in the liquid level monitoring alarm device and is used for monitoring the liquid level of a circulating liquid chamber in the leaching device in real time, outputting an alarm signal indicating that the liquid level is insufficient to the control device when the liquid level is lower than the lower limit of the liquid level threshold value, and outputting an alarm signal indicating that the liquid level is over-limit to the control device when the liquid level is higher than the upper limit of the liquid level threshold value; the control device is also used for controlling the corresponding reduction of the opening degree of the regulating valve after receiving the alarm signal of insufficient liquid level and controlling the corresponding increase of the opening degree of the regulating valve after receiving the alarm signal of overrun liquid level.
Has the advantages that:
the utility model discloses a UF6The gas leakage accident emergency treatment system has good inclusion, meets the requirements of preventing pollution diffusion and reducing the release amount of radioactive substances in a control area of a radioactive workplace, and realizes the principles of deep defense and intrinsic safety.
Drip washing device has ingeniously designed spray thrower structural style and position distribution, adopts the forced circulation mode to guarantee effectively that water smoke evenly covers whole gas circulation space to UF has been guaranteed6The absorption effect and the concentration of the absorption liquid are uniform and controllable.
Drip washing device is through reasonable setting advance, gas vent position, control spray velocity, has guaranteed gas, the double-phase countercurrent contact of liquid and has carried out abundant hydrolysis, ensures gaseous dwell time in drip washing device, has greatly improved UF6The absorption efficiency of (2).
Drawings
Fig. 1 is a front view of a geometrically safe leaching device provided in embodiment 1 of the present invention;
fig. 2 is a left side view of a geometrically safe leaching device provided in embodiment 1 of the present invention;
fig. 3 is a top view of a geometrically safe leaching device provided in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of the top of the right circulation liquid chamber in the geometrically safe leaching device provided in embodiment 1 of the present invention;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic structural view of a sprayer d1 in FIG. 4;
FIG. 7 is an enlarged schematic view of region A of FIG. 4;
FIG. 8 shows UF obtained in example 2 of the present invention6Schematic diagram of a gas leakage accident emergency treatment system.
In the figure: 100-gas monitoring alarm device; 101-HF monitoring alarm unit; 102-video monitoring alarm unit; 200-a liquid level monitoring alarm device; 300-a control device; 400-UF6An emergency exhaust system; 500-geometric safety leaching device; 501-right circulating liquid chamber; 502-left circulation fluid chamber; a1, a 2-liquid outlet; b-an air inlet; c-an exhaust port; d1, d2, d3, d4, d5, d 6-showers; e1, e 2-liquid level port; f-a water inlet; g, straight pipe; h-a spray pipe; j-pipe.
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 described in further detail with reference to the accompanying drawings and examples.
Example 1:
this embodiment provides a leaching device, it includes: the circulating pump comprises a circulating liquid chamber, a circulating pump and a pipeline connected with the circulating liquid chamber and the circulating pump. The top of the circulating liquid chamber is provided with a water inlet and at least one sprayer, the middle upper part is provided with an air inlet and an air outlet, and the bottom is provided with a liquid outlet. The input end of the circulating pump is connected with the liquid outlet through a pipeline, and the output end of the circulating pump is connected with the water inlet end of each sprayer through a pipeline. Wherein, the air inlet is used for introducing air containing leakage gas; the water inlet is used for injecting a certain amount of leacheate (such as deionized water) or adding leacheate in advance; the exhaust port is used for exhausting tail gas. As for the specific number of the water inlets, the shower, the air inlets, the air outlets and the liquid outlets, it can be set by those skilled in the art according to the actual engineering situation.
In this embodiment, the leaching device adopts the forced circulation mode to spray the absorption to leaking gas through circulating fluid chamber and circulating pump, and purification efficiency is high, and radioactive substance content is low in the tail gas, has effectively guaranteed the safety of personnel, equipment and environment under the accident condition.
The number of the sprayers can be multiple, and preferably, the number of the sprayers is 2-4. Each sprayer is communicated with one spraying pipe through a corresponding straight pipe; the bottom of the spray pipe is provided with a plurality of spray holes, preferably a plurality of fine spray holes, which are used for continuously spraying uniform fine water mist to ensure that the water mist sprayed by each sprayer can effectively cover the whole reaction area of the circulating liquid chamber and can fully contact and react with the leaked gas, so that the contact area and the contact time of the circulating liquid and the leaked gas are increased, and the absorption efficiency of the leaked gas is improved.
The spray holes can be arranged at equal intervals along the length direction of the spray pipe; the spray orifice can adopt a circular spray orifice with the diameter of 2 mm-4 mm.
The exhaust port is slightly higher than the intake port to prevent leakage gas from being exhausted from the exhaust port without being sufficiently absorbed.
Two liquid level ports are arranged at the middle lower part of the circulating liquid chamber along the vertical direction and used for observing the liquid level height of absorption liquid in the circulating liquid chamber.
The circulating liquid chamber can adopt a plate type cavity structure and has good geometric safety characteristics.
This embodiment also provides a geometrically safe rinsing device, as shown in fig. 1 to 7, which includes: a right circulation liquid chamber 501, a left circulation liquid chamber 502, and a circulation pump (not shown in the figure).
As shown in fig. 2 and 3, the right circulating liquid chamber 501 and the left circulating liquid chamber 502 are symmetrically arranged, and the distance between the axes of the two chambers should meet the critical safety calculation requirement, and the preferred embodiment is 1000 mm.
The right circulating liquid chamber 501 and the left circulating liquid chamber 502 both adopt plate type cavity structures, namely, the leaching device adopts two plate type cavity containers which are parallel and symmetrical, so that the defects of the original treatment measures are made up, and the process safety and the critical safety of the whole gas absorption process are ensured.
The volume and the external dimension of the spray absorption device 11 can be designed according to the actual needs of each project. The plate-type cavity container is made of a stainless steel lining F40 material, has good corrosion resistance and can resist hydrofluoric acid corrosion.
As shown in fig. 1 to 4, the top of the right circulating liquid chamber 501 is provided with a water inlet f and three sprayers d1, d2 and d3, the water inlet f is located at one side edge of the top of the right circulating liquid chamber 501, the three sprayers d1, d2 and d3 are arranged in a straight line and at equal intervals, and the bottom of the right circulating liquid chamber 501 is provided with a liquid discharge port a 1. As shown in fig. 1 to 3, the top of the left circulating liquid chamber 502 is provided with three sprayers d4, d5 and d6, the three sprayers d4, d5 and d6 are arranged in a straight line and at equal intervals, the middle lower part of the left circulating liquid chamber 502 is provided with two liquid level ports e1 and e2, the liquid level port e1 is higher than the liquid level port e2, the liquid level in the circulating liquid chamber can be continuously observed through the two liquid level ports, and the bottom of the left circulating liquid chamber 502 is provided with a liquid discharge port a 2.
Of course, the top of the left circulating liquid chamber 502 can also be provided with a water inlet, and the number of the water inlets at the top of the left and right circulating liquid chambers can be more than one; the middle lower part of the right circulating liquid chamber 501 can also be provided with two liquid level ports; the number of the showerers disposed on the tops of the right circulating liquid chamber 501 and the left circulating liquid chamber 502 is not limited to three, and may be more or less, and the number of the showerers disposed on the tops of the two chambers may be the same or different.
As shown in fig. 2 and 3, the two circulating liquid chambers 501 and 502 share the intake port b and the exhaust port c. Specifically, the upper portions of the two circulating liquid chambers 501 and 502 are connected to the intake port b through an intake duct, and to the exhaust port c through an exhaust duct. The exhaust port c is higher than the intake port b. Of course, the number of the air inlet b and the air outlet c may be more than one.
As shown in fig. 2, the connection passages (i.e., the exhaust pipes) between the exhaust port c and the two circulating liquid chambers 501 and 502, respectively, are provided with a predetermined gradient. In other words, the part of the exhaust port c connected with the left and right circulating liquid chambers is provided with a certain gradient, so that the absorption effect of the leaked gas is ensured, and meanwhile, the absorption liquid is effectively prevented from entering the exhaust pipeline along with unabsorbed gas in the circulating absorption process.
As shown in fig. 2 and 3, the lower parts of the two circulating liquid chambers 501 and 502 are communicated through two pipelines j, and the left and right sides form a U-shaped communicating vessel, so that the heights of the absorption liquids in the two circulating liquid chambers are the same, and the concentrations of the absorption liquids are uniform.
The input end of the circulating pump is respectively connected with the liquid outlet ports a1 and a2 through pipelines, the output end of the circulating pump is respectively connected with the water inlet ends of the sprayers d1 to d6 through pipelines, the absorption liquid circularly flows between the sprayers and the two circulating liquid chambers through the circulating pump until the leaked gas is completely absorbed, the circulating pump is closed after the absorption is completed, the liquid outlet ports a1 and a2 at the bottoms of the two circulating liquid chambers are opened, and the absorption liquid is sent to a subsequent recovery system.
As shown in fig. 4 to 7, the sprayers d1 to d3 are respectively communicated with one spray pipe h through the corresponding straight pipes g, the sprayers d4 to d6 are respectively communicated with the other spray pipe h through the corresponding straight pipes g, the bottom of each spray pipe h is provided with a plurality of fine spray holes which are arranged at equal intervals along the length direction of each spray pipe h, uniform fine water mist can be continuously sprayed out, and the spray holes are circular spray holes with the diameter of 2 mm-4 mm. By skillfully designing the structural form and the position distribution of the sprayer, the formed water mist is effectively ensured to uniformly cover all airflow spaces of the circulating liquid chamber, so that the concentration of the absorption liquid is ensured to be uniform and controllable.
In this embodiment, the air inlet b of the geometrically safe leaching device can be connected with UF6The pipeline connection and the water inlet f of the emergency exhaust system are filled with a certain amount of absorption liquid (such as deionized water) in advance, and the air inlet b is respectively communicated with the left circulating liquid chamber and the right circulating liquid chamber. The upper part of the circulating liquid chamber is UF6Spraying an absorption area, and forming absorption liquid through gas-liquid two-phase countercurrent contact and reaction; the middle part of the circulating liquid chamber is provided with a gas inlet and outlet channel; the lower part of the circulating liquid chamber is an absorption liquid temporary storage area, and the leacheate is sprayed out from the top of the circulating liquid chamber and automatically flows to the lower part of the circulating liquid chamber after reaction. The leacheate is pumped from the liquid outlets a1 and a2 to the water inlet ends of the sprayers d1 to d6 by a circulating pump, and the deionized water is sprayed from the sprayers at a certain speedSpraying from the spray pipe at the lower part of the device, and UF entering the circulating liquid chamber from the air inlet b6Hydrolysis reaction takes place to form UO2F2And HF aqueous solution, wherein the absorption liquid automatically flows to the bottom of the circulating liquid chamber, unabsorbed gas is discharged through the exhaust port c, and the unabsorbed gas is discharged through a chimney after being detected to be qualified.
The whole leaching device 1 adopts an integral structure, and the positions and the sizes of the cavity structure, the spray holes, the air inlet and the air outlet are reasonably arranged, so that the gas-liquid two-phase countercurrent contact is ensured, the full hydrolysis reaction is carried out, the retention time of gas in the device is ensured, and the UF (UF) is greatly improved6The absorption efficiency of (2).
In conclusion, the leaching device leaks UF in accident exhaust through a circulating spraying technology6Hydrolysis reaction occurs to form uniform absorption liquid, and then continuous circulation absorption is performed through the circulating pump, so that the system safety is ensured, and meanwhile, the higher absorption efficiency is achieved.
Example 2:
this example provides a UF6Gas leakage accident emergency treatment system.
UF occurs during operation6And when the leakage accident happens, the leakage accident is effectively contained through the third-level barrier. Wherein the first barrier is UF6A special container, a second-stage barrier is a gasification tank, a third-stage barrier is a gasification hall, and the three-stage barriers are sequentially coated with UF6And (3) feeding. In other words, UF6The special container is arranged inside the gasification tank, and the gasification tank is arranged inside the gasification hall.
As shown in fig. 8, the emergency treatment system includes: the gas monitoring alarm device 100, the control device 300 and the geometric safety leaching device 500 in the embodiment 1. Air inlet b and UF of geometric safety leaching device 5006The emergency exhaust system 400 is connected with a pipeline, and the water inlet f of the geometric security leaching device 500 is used for injecting a certain amount of leaching liquid in advance, wherein the leaching liquid can adopt deionized water.
The gas monitoring alarm device 100 is used for monitoring whether UF occurs in a gasification hall in real time6Gas leakage is monitored, and when the gas leakage is monitored, an alarm signal is output to the control device 300; the control device 300 is used forAfter receiving said alarm signal, interlock initiation UF6An emergency exhaust system 400 and a geometrically safe leaching device 500.
In this embodiment, the emergency processing system can monitor UF in time6Leaks and sends out an alarm signal, and then UF leaked to a gasification hall is treated by an emergency exhaust system and a leaching device6The gas is purified to ensure UF6Safety and reliability of personnel, equipment and environment under leakage accident conditions. Moreover, the emergency treatment system adopts automatic control, does not need staff to intervene under the accident condition, can automatically respond according to a preset program, and reduces the irradiation risk of operators.
The control device 300 is also used for interlocking and closing the normal air supply and exhaust system in the gasification hall and closing UF after receiving the alarm signal6Valves in the lines and vaporizer heating units, and start UF6Emergent exhaust system of accident.
The gas monitoring alarm device 100 comprises an HF monitoring alarm unit 101 and a video monitoring alarm unit 102, namely, the HF monitoring alarm unit 101 and the video monitoring alarm unit 102 are used for monitoring UF simultaneously6Whether gas leaks out.
The HF monitoring alarm unit 101 may employ existing HF concentration detection alarm technology. Particularly when UF is used6After gas leakage, the gas rapidly reacts with water in the air to generate HF, and the concentration of HF is detected to determine whether UF occurs6The gas leaks.
The video surveillance alarm unit 102 may employ existing UFs based on video technology6A smoke plume detection system. Specifically, UF6When the gas interacts with water in the air, a clearly visible "white smoke" is present, i.e. UF is generated6And (4) smoke plume. UF based on video technology6The smoke plume detection system is based on the graphs collected by the camera and utilizes the image processing and sensing technology to identify UF6A special moving pattern of the smoke plume. Accurate detection of UF6Smoke plume pattern to give accurate UF early6A leak alarm.
Once produced, is processedIn which UF takes place6When a leakage accident occurs, the HF monitoring alarm unit 101 sends an alarm or the video monitoring alarm unit 102 identifies an abnormality, the control device 300 closes the normal air supply and exhaust system in the gasification hall in an interlocking manner, and UF is started in an interlocking manner6Emergency exhaust system in case of accident, with UF closed6Valve on pipeline and heating device of gasification tank by UF6UF to be leaked by accident emergency exhaust system6And (4) conveying the gas to a geometric safety leaching device for purification and absorption treatment, conveying the absorption liquid to a subsequent recovery system, and conveying the tail gas to a high chimney for discharge.
The pipeline where the circulating pump is located in the geometric safety leaching device 500 is provided with an adjusting valve for adjusting the flow of the circulating pump. In this embodiment, the regulating valve is an electromagnetic valve.
The emergency treatment system further comprises a liquid level monitoring alarm device 200, wherein a liquid level threshold value is preset in the liquid level monitoring alarm device 200, the liquid level monitoring alarm device is used for monitoring the liquid level of a circulating liquid chamber in the geometric safety leaching device 500 in real time, outputting an alarm signal indicating that the liquid level is insufficient to the control device 300 when the liquid level is lower than the lower limit of the liquid level threshold value, and outputting an alarm signal indicating that the liquid level is over-limit to the control device 300 when the liquid level is higher than the upper limit of the liquid level threshold value.
The control device 300 is further configured to control the opening of the solenoid valve to be correspondingly decreased after receiving the insufficient liquid level alarm signal, and to control the opening of the solenoid valve to be correspondingly increased after receiving the overrun liquid level alarm signal.
In this embodiment, all can automatic alarm when the liquid level of the indoor absorption liquid of circulating liquid is not enough or transfinites, and the flow of circulating pump is adjusted to the interlocking solenoid valve to guarantee that the indoor absorption liquid of circulating liquid is in normal liquid level all the time.
The emergency processing system further comprises an emergency power transmission device, and operation of the system under the power-off working condition is guaranteed.
Taken together, UF6The gas leakage accident emergency processing system scientifically integrates systems such as instrument monitoring, video monitoring, automatic control, accident exhaust, electrical guarantee and the like on the basis of adding a geometric safety leaching device, organically integrates the systems,form an intelligent control operation system integrating safety, reliability and practicability, and realize UF6Effective control of leakage before, during and after6The leakage has good emergency treatment effect, and the safety of personnel is ensured.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (13)
1. A leaching apparatus, comprising: the circulating liquid chamber, the circulating pump and the pipeline connected with the circulating liquid chamber and the circulating pump; the top of the circulating liquid chamber is provided with a water inlet and at least one sprayer, the middle upper part of the circulating liquid chamber is provided with an air inlet and an air outlet, and the bottom of the circulating liquid chamber is provided with a liquid outlet; the input end of the circulating pump is connected with the liquid outlet through a pipeline, and the output end of the circulating pump is connected with the water inlet end of each sprayer through a pipeline.
2. The leaching apparatus according to claim 1, wherein each of the showers is in communication with one of the showers via a corresponding straight pipe; the bottom of the spray pipe is provided with a plurality of spray holes.
3. The washing apparatus as claimed in claim 2, wherein the spray holes are arranged at equal intervals along the length direction of the spray pipe; the spray holes are circular spray holes with the diameter of 2-4 mm.
4. The washing apparatus as claimed in claim 1, wherein the gas outlet is higher than the gas inlet.
5. The washing apparatus as claimed in claim 1, wherein the number of the sprayers is 2-4.
6. The washing apparatus as claimed in claim 1, wherein the circulation chamber is of a plate-type cavity structure.
7. The washing apparatus according to any one of claims 1-6, characterised in that the washing apparatus comprises two circulation chambers, which are arranged symmetrically; the two circulating liquid chambers share an air inlet and an air outlet.
8. The washing apparatus as claimed in claim 7, wherein the connecting channels between the gas outlet and the two circulating liquid chambers, respectively, are provided with a predetermined gradient.
9. The washing apparatus as claimed in claim 7, wherein the lower parts of the two circulation chambers are connected by at least one pipe.
10. UF (ultra filtration factor)6Gas leakage accident emergency treatment system, its characterized in that includes: a gas monitoring alarm device, a control device and a leaching device according to any one of claims 1 to 9; the air inlet of the leaching device and UF6The pipeline of the emergency exhaust system is connected; the gas monitoring and alarming device is used for monitoring whether UF occurs in the gasification hall in real time6Gas leakage is monitored, and an alarm signal is output to the control device when the gas leakage is monitored; the control device is used for starting UF in an interlocking manner after receiving the alarm signal6An emergency exhaust system for accidents and the leaching device.
11. Emergency treatment system according to claim 10, characterised in that the control device is further arranged to, upon receipt of the alarm signal, interlockingly shut down the normal supply and exhaust system in the gasification lobby, shut down UF and6valves in the lines and vaporizer heating units, and start UF6Emergent exhaust system of accident.
12. The emergency processing system of claim 10, wherein the gas monitoring alarm device comprises an HF monitoring alarm unit and a video monitoring alarm unit.
13. The emergency treatment system according to claim 10, wherein the washing apparatus is provided with an adjusting valve on a pipe where the circulation pump is located; the system also comprises a liquid level monitoring alarm device, wherein a liquid level threshold value is preset in the liquid level monitoring alarm device and is used for monitoring the liquid level of a circulating liquid chamber in the leaching device in real time, outputting an alarm signal indicating that the liquid level is insufficient to the control device when the liquid level is lower than the lower limit of the liquid level threshold value, and outputting an alarm signal indicating that the liquid level is over-limit to the control device when the liquid level is higher than the upper limit of the liquid level threshold value; the control device is also used for controlling the corresponding reduction of the opening degree of the regulating valve after receiving the alarm signal of insufficient liquid level and controlling the corresponding increase of the opening degree of the regulating valve after receiving the alarm signal of overrun liquid level.
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| CN201920754709.9U CN210021676U (en) | 2019-05-23 | 2019-05-23 | Leaching device and UF6 gas leakage accident emergency processing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043807A (en) * | 2019-05-23 | 2019-07-23 | 中国核电工程有限公司 | A kind of UF6Pipe leakage emergent treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110043807A (en) * | 2019-05-23 | 2019-07-23 | 中国核电工程有限公司 | A kind of UF6Pipe leakage emergent treatment system |
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