Automatic process tail gas field collection system
By designing an automated on-site process exhaust gas collection system, the grouped automated collection and parameter monitoring of tritium-containing exhaust gas in nuclear facility work sites is achieved, solving the problems of incomplete exhaust gas collection and insufficient monitoring in existing technologies, and improving treatment efficiency and environmental protection capabilities.
Patent Information
- Application Number
- CN202423119877.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Existing technologies are unable to effectively collect and treat tritium-containing waste gas generated at nuclear facility operating sites, leading to environmental pollution, and the collection process lacks automation and parameter monitoring and recording functions.
Design an automated process exhaust gas collection system, including a first mechanical pump, a first ionization chamber, a mass flow meter, a compression pump, a controller, and multiple sets of exhaust gas cylinders. The controller controls the opening and closing of the first shut-off valve to achieve automated group collection of exhaust gas cylinders. Pressure gauges and flow meters are used to monitor parameters, which are stored in the controller for future reference.
It realizes the automated grouping treatment of waste gas, monitors and records the parameters during the treatment process, improves the collection efficiency and environmental protection effect, ensures that the exhaust bottles do not interfere with each other, and the parameters can be displayed and called in real time.
Smart Images
Figure CN223459508U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of radiation protection and environmental protection, in particular to an automatic process tail gas on-site collection system. BACKGROUND
[0002] According to actual work needs, the nuclear facility operating site will produce waste gas containing high radioactivity tritium gas and tritiated water. Direct discharge of these tritium-containing waste gas will pollute the environment, and it is necessary to collect it into a special tail gas bottle, then transport it to a purification treatment to make the tritium content of the discharge reach or be lower than the tritium discharge standard, to meet the requirements of environmental protection
[0003] According to actual work needs, during the collection process, multiple flushing and collection through tritium tail gas bottles are required, and related parameters during the collection process are recorded, and historical data can be queried. CONTENT OF THE UTILITY MODEL
[0004] The present application provides an automatic process tail gas on-site collection system, which can realize automatic processing of waste gas in groups and can monitor and record parameters during processing.
[0005] The present application is implemented by the following technical solutions:
[0006] An automatic process tail gas on-site collection system, comprising a first mechanical pump, a first ionization chamber, a mass flow meter, a compression pump, a controller and multiple groups of tail gas bottles;
[0007] Each group of tail gas bottles is provided with a first shut-off valve, and a first pressure gauge is connected between the first shut-off valve and the tail gas bottle, wherein the first shut-off valve is connected with the outlet of the tail gas bottle through a corrugated hose;
[0008] All first shut-off valves are connected with the mass flow meter through a second shut-off valve, the mass flow meter is connected with the first ionization chamber, and the first ionization chamber is connected with a vacuum booster pump of a collection device through the first mechanical pump;
[0009] Wherein, all first shut-off valves are also connected with the compression pump through a third shut-off valve, and the compression pump is in communication with the environment gas; all first shut-off valves are also connected to a second pressure gauge; the first mechanical pump, the mass flow meter, the compression pump, the first shut-off valve, the second shut-off valve, the third shut-off valve, the first pressure gauge and the second pressure gauge are connected with the controller respectively.
[0010] The automatic process tail gas on-site collection system provided by the application can perform vacuum treatment on the tail gas bottle through the first mechanical pump and the vacuum booster pump in the purification device, when the vacuum degree in the tail gas bottle reaches the limit value, the ambient gas can flush the tail gas bottle under the action of pressure difference and the compression pump, and the tail gas bottle realizes the collection and treatment of tritium waste gas, when the next vacuum treatment is performed on the tail gas bottle, the tritium waste gas in the tail gas bottle enters the purification device for subsequent treatment; wherein, the on-off of the first shut-off valve is controlled by the controller to realize the automatic collection and treatment of the tail gas bottle in groups, that is, one group of tail gas bottles is collected and then the next group of tail gas bottles is collected, each group of tail gas bottles does not interfere with each other, and the pressure, flow and mass parameters can be monitored through the setting of the first pressure gauge, the second pressure gauge and the mass flow meter, and these parameters can be stored in the controller, and the controller can realize reading or real-time display through parameter calling.
[0011] In some optional embodiments, the first ionization chamber is configured with a first electrometer.
[0012] In some optional embodiments, the tail gas bottle is configured as no less than four groups.
[0013] In some optional embodiments, the tail gas bottle and the first pressure gauge are connected through a fourth shut-off valve.
[0014] In some optional embodiments, all the first shut-off valves are configured as electrical interlocking.
[0015] In some optional embodiments, a cabinet is further included, and the first mechanical pump, the first ionization chamber, the mass flow meter, the compression pump and the controller are respectively located in the cabinet.
[0016] In some optional embodiments, the cabinet is configured with a cooling fan.
[0017] In some optional embodiments, the cabinet is configured with a display screen connected with the controller.
[0018] In some optional embodiments, the cabinet and the tail gas bottle are respectively configured with casters.
[0019] In some optional embodiments, a second mechanical pump and a second ionization chamber are further included; the second mechanical pump is connected with the second ionization chamber, the second ionization chamber is in communication with ambient gas, and the second ionization chamber is further configured with a second electrometer.
[0020] Compared with the prior art, the application has the following advantages and beneficial effects:
[0021] The automatic process tail gas on-site collection system provided by the application can perform vacuum treatment on the tail gas bottle through the first mechanical pump and the vacuum booster pump in the purification device, when the vacuum degree in the tail gas bottle reaches the limit value, the environment gas can flush the tail gas bottle under the action of pressure difference and the compression pump, and the tail gas bottle realizes the collection and treatment of tritium waste gas, when the vacuum treatment is performed on the tail gas bottle next time, the tritium waste gas in the tail gas bottle enters the purification device for subsequent treatment, wherein the on-off of the first shut-off valve is controlled by the controller, so that the automatic collection and treatment of the tail gas bottle in groups can be realized, that is, one group of tail gas bottles is collected and then the next group of tail gas bottles is collected, the groups of tail gas bottles do not interfere with each other, and the pressure, flow and mass parameters can be monitored through the setting of the first pressure gauge, the second pressure gauge and the mass flow meter, and these parameters can be stored in the controller, and the controller can realize the review or real-time display through the parameter calling. BRIEF DESCRIPTION OF DRAWINGS
[0022] The drawings described herein are used to provide further understanding of the embodiments of the application, constitute a part of the application, and do not constitute a limitation on the embodiments of the application. In the drawings:
[0023] Fig. 1 The connection schematic diagram of the automatic process tail gas on-site collection system provided by the embodiments of the application is shown;
[0024] Fig. 2 The structure schematic diagram of the automatic process tail gas on-site collection system provided by the embodiments of the application is shown from the first perspective;
[0025] Fig. 3 The structure schematic diagram of the automatic process tail gas on-site collection system provided by the embodiments of the application is shown from the second perspective.
[0026] The marks in the drawings and the corresponding names of parts:
[0027] 1-cabinet, 2-tail gas bottle group, 3-first shut-off valve, 4-first pressure gauge, 5-second pressure gauge, 6-third shut-off valve, 7-compression pump, 8-second shut-off valve, 9-mass flow meter, 10-first ionization chamber, 11-first mechanical pump, 12-second mechanical pump, 13-second ionization chamber, 14-first electrometer, 15-second electrometer, 16-radiating fan, 17-display screen, 18-control button plate, 19-mouse keyboard, 20-controller, 21-castor wheel. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application is further described in detail below in combination with the embodiments and drawings, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not limit the application.
[0029] As Figs. 1-3 The automatic process tail gas on-site collection system provided by the application comprises a first mechanical pump 11, a first ionization chamber 10, a mass flow meter 9, a compression pump 7, a controller 20 and a plurality of groups of tail gas bottles; each group of tail gas bottles is provided with a first shutoff valve 3, a first pressure gauge 4 is connected between the first shutoff valve 3 and the tail gas bottle, wherein the first shutoff valve 3 is connected with the outlet of the tail gas bottle through a corrugated hose; all the first shutoff valves 3 are connected with the mass flow meter 9 through a second shutoff valve 8 after being gathered, the mass flow meter 9 is connected with the first ionization chamber 10, and the first ionization chamber 10 is connected with a vacuum booster pump in a purification device through the first mechanical pump 11; wherein all the first shutoff valves 3 are also connected with the compression pump 7 through a third shutoff valve 6 after being gathered, and the compression pump 7 is in communication with ambient gas; all the first shutoff valves 3 are also connected to a second pressure gauge 5 after being gathered; the first mechanical pump 11, the mass flow meter 9, the compression pump 7, the first shutoff valve 3, the second shutoff valve 8, the third shutoff valve 6, the first pressure gauge 4 and the second pressure gauge 5 are respectively connected with the controller 20.
[0030] The automatic process tail gas on-site collection system provided by the application can perform vacuumizing treatment on the tail gas bottle through the first mechanical pump 11 and the vacuum booster pump in the purification device, when the vacuum degree in the tail gas bottle reaches a limit value, ambient gas can flush the tail gas bottle under the action of pressure difference and the compression pump 7, and the tail gas bottle realizes collection and treatment of tritium waste gas, when the tail gas bottle is vacuumized again, the tritium waste gas in the tail gas bottle enters the purification device for subsequent treatment; wherein the on-off of the first shutoff valve 3 controlled by the controller 20 can realize automatic collection and treatment of the tail gas bottle in groups, that is, one group of tail gas bottles is used for collection and the next group of tail gas bottles is used for collection, the groups of tail gas bottles do not interfere with each other, and the setting of the first pressure gauge 4, the second pressure gauge 5 and the mass flow meter 9 can realize monitoring of gas pressure, flow and mass parameters, and these parameters can be stored in the controller 20, and the controller 20 can realize reading or real-time display through parameter calling.
[0031] In the embodiment of the application, the setting of the soft corrugated tube can provide a larger installation position allowance for the tail gas bottle, that is, during the installation and replacement of the tail gas bottle, it is not necessary to install the tail gas bottle to a specific position every time, which will be conducive to the improvement of installation convenience.
[0032] In some optional embodiments, the first ionization chamber 10 is provided with a first electrometer 14.
[0033] In the embodiments of the present application, the first electrometer 14 can be used to monitor the health status of the first ionization chamber 10. The first electrometer 14 is usually connected to the controller 20. When the first electrometer 14 detects an abnormal state of the first ionization chamber 10, the controller 20 can timely control the working state of the first ionization chamber 10, such as power adjustment, shutdown / standby, etc. Preferably, the first electrometer 14 is configured as an electrometer with display function to facilitate real-time observation by the staff.
[0034] In some optional embodiments, the tail gas bottle is configured as no less than four groups.
[0035] In the embodiments of the present application, according to the working needs, the number of tail gas bottles can be configured as four groups, five groups, six groups, etc. to complete more tritium waste gas collection through the tail gas bottles in one working process.
[0036] In some optional embodiments, the tail gas bottle is connected to the first pressure gauge 4 through the fourth shut-off valve.
[0037] In the embodiments of the present application, the fourth shut-off valve serves as a safety valve for the tail gas bottle. Through the setting of the fourth shut-off valve, the connection between the tail gas bottle and the collection system can be controlled to ensure the safety during system operation. Preferably, the fourth shut-off valve can be connected to the controller 20. The fourth shut-off valve and the controller 20 can adopt wireless communication, so that the line connection between the fourth shut-off valve and the controller 20 does not need to be performed separately when the tail gas bottle is installed / replaced, which is conducive to the improvement of operation convenience.
[0038] In some optional embodiments, all the first shut-off valves 3 are electrically interlocked.
[0039] In the embodiments of the present application, the electrical interlocking of the first shut-off valves 3 on the multiple tail gas bottle groups 2 can improve the safety during system operation. That is, when tritium waste gas collection and treatment is performed through one group of tail gas bottles, the first shut-off valve 3 corresponding to this group of tail gas bottles is opened, and the first shut-off valves 3 corresponding to other groups are closed. The collection and treatment processes of the tail gas bottles in different groups do not affect each other.
[0040] In some optional embodiments, the automatic process tail gas field collection system further comprises a cabinet 1. The first mechanical pump 11, the first ionization chamber 10, the mass flow meter 9, the compression pump 7, and the controller 20 are respectively located in the cabinet 1.
[0041] In the embodiments of the present application, through the setting of the cabinet 1, the first mechanical pump 11, the first ionization chamber 10, the mass flow meter 9, the compression pump 7, and the controller 20 can be protected.
[0042] In some optional embodiments, the cabinet 1 is provided with a cooling fan 16.
[0043] In the embodiment of the present application, the heat in the cabinet 1 can be dissipated to the outside of the cabinet 1 through the setting of the heat dissipation fan 16, so as to prevent the temperature in the cabinet 1 from being too high to affect the normal operation of the electrical devices in the cabinet 1. In the working state, the heat dissipation fan 16 is located at the top of the cabinet 1.
[0044] In some optional embodiments, the cabinet 1 is provided with a display screen 17 connected with the controller 20.
[0045] In the embodiment of the present application, the display screen 17 can display the monitoring parameters stored by the controller 20, so as to facilitate the manual monitoring of the staff; preferably, the display screen 17 can be set as an industrial touch screen, by configuring the control of the industrial touch screen and making it in real-time communication with the controller 20, the staff can manually control through the display screen 17, such as manually controlling the on-off of the first shut-off valve 3, the second shut-off valve 8, the third shut-off valve 6 and the fourth shut-off valve, manually controlling the start-stop of the first mechanical pump 11, the first ionization chamber 10, the compression pump 7 and the vacuum booster pump in the purification device, the operating parameters, etc. In actual implementation, the display screen 17 is embedded on the cabinet wall of the cabinet 1 for the staff to observe or operate.
[0046] In the embodiment of the present application, the display screen 17 has a size of 14 inches, a resolution of 1028*768 or above, a refresh frequency of 75Hz or above, a brightness of 70cd or above, and an interface type including VGA interface and HDMI interface.
[0047] In some optional embodiments, when the first electrometer 14 is an electrometer with display function, the digital display screen of the first electrometer 14 can be embedded on the cabinet wall of the cabinet 1 for the staff to refer to.
[0048] In some optional embodiments, the cabinet wall of the cabinet 1 is also embedded with a control button plate 18, the control button plate 18 has a plurality of control buttons connected with the controller 20 for manual operation by the staff.
[0049] In some optional embodiments, the cabinet 1 is also provided with a mouse keyboard 19, in actual implementation, a drawer can be provided on the cabinet 1, and the mouse keyboard 19 is placed in the drawer, the mouse keyboard 19 is connected with the controller 20 respectively, through the setting of the mouse keyboard 19, the staff can conveniently regulate and control the operating parameters of the collection system.
[0050] In some optional embodiments, the cabinet 1 and the tail gas bottle are respectively provided with a castor 21.
[0051] In the embodiment of the present application, the setting of the castor 21 can facilitate the staff to move the whole collection system.
[0052] In some optional embodiments, the automatic process tail gas on-site collection system further comprises a second mechanical pump 12 and a second ionization chamber 13; the second mechanical pump 12 is connected with the second ionization chamber 13, the second ionization chamber 13 is in communication with the ambient gas, and the second ionization chamber 13 is further provided with a second electrometer 15.
[0053] In the embodiments of the present application, the second mechanical pump 12 and the second ionization chamber 13 can measure the concentration of tritium in the ambient gas.
[0054] In some optional embodiments, the controller 20 can comprise an industrial computer, which is actually configured to have four or more cores, a memory of 8G or more in dual-channel, a network function of supporting an Ethernet interface, an I / O interface of supporting a serial port and a USB interface (not less than four), and a hard disk space of a mechanical hard disk of 1T or more.
[0055] In some optional embodiments, the number of tail gas bottles in each group of tail gas bottles can be three, the rated capacity of the tail gas bottles is 8L, the bottle wall of the tail gas bottles is carbon fiber, the branch outlet of the tail gas bottles is 1 / 4 inch VCR external thread, and the total outlet is 1 / 2 VCR external thread specification.
[0056] In some optional embodiments, the range of the first pressure gauge 4 and the second pressure gauge 5 is configured to be -100-150KPa, and the accuracy is not greater than ±30%.
[0057] In some optional embodiments, the vacuum booster pump in the purification device can be configured to have a normal pressure flow of not less than 20m3 / h and an ultimate vacuum of not greater than 10Pa.
[0058] In the collection process, tritium exhaust gas is collected by one group of exhaust bottles at a time, and then collected by the next group of exhaust bottles after the collection is completed. The number of groups 2 of exhaust bottles connected can be counted by the sensor at the fixed position of the group 2 of exhaust bottles, and recorded in the controller 20 by manual confirmation through the mouse and keyboard 19. The specific collection process is as follows: manually place the group 2 of exhaust bottles in the working position, fix the total gas outlet of the exhaust bottle to the corrugated hose at the lower end of the first pressure gauge 4, open the vacuum booster pump in the purification device, open the fourth shut-off valve on the exhaust bottle, and open other electrical devices controlled by the controller 20; scan the barcode on the group 2 of exhaust bottles and record the start time in the background, start the first mechanical pump 11, open the second shut-off valve 8, and open the first shut-off valve 3 corresponding to the group of exhaust bottles, when the vacuum degree measured by the second pressure gauge 5 reaches 1000 Pa, which is a temporary value, and the final value is adjusted according to the process parameters to achieve vacuumization of the exhaust bottle; when the vacuum degree measured by the first pressure gauge 4 reaches 10000 Pa, close the second shut-off valve 8, record the process time in the background of the controller 20, and according to the flow rate recorded by the mass flow meter 9 and the electrostatic gauge measurement data recorded by the first electrostatic gauge 14, open the third shut-off valve 6, and use the pressure difference to suck in ambient air to inflate the exhaust bottle, when the vacuum degree measured by the second pressure gauge 5 reaches about 90000 Pa, close the third shut-off valve 6 to form a cycle of collection. Open the second shut-off valve 8 again and repeat the above process to perform cycle collection and flushing, and the cycle number can be set. When the electrostatic gauge measurement value is lower than the set value or the set cycle number is reached, the controller 20 automatically switches to the collection process of the next group 2 of exhaust bottles or more groups 2 of exhaust bottles.
[0059] The above describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Although the description of the present application is introduced in combination with some embodiments, it does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details are included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0060] It should be noted that in the description of the application, similar reference numerals and letters in different drawings represent similar items, therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0061] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.
Claims
1. An automated process off-gas field collection system, characterized by, The first mechanical pump (11), the first ionization chamber (10), the mass flow meter (9), the compression pump (7), the controller (20) and the plurality of groups of tail gas bottles are included. Each group of the tail gas bottles is provided with a first shut-off valve (3), and a first pressure gauge (4) is connected between the first shut-off valve (3) and the tail gas bottle, wherein the first shut-off valve (3) is connected with the outlet of the tail gas bottle through a corrugated hose. All the first shut-off valves (3) are connected with the mass flow meter (9) through a second shut-off valve (8), the mass flow meter (9) is connected with the first ionization chamber (10), and the first ionization chamber (10) is connected with a vacuum booster pump in a purification device through the first mechanical pump (11). Wherein, all the first shut-off valves (3) are also connected with the compression pump (7) through a third shut-off valve (6), the compression pump (7) is in communication with the ambient gas, and all the first shut-off valves (3) are connected with a second pressure gauge (5); the first mechanical pump (11), the mass flow meter (9), the compression pump (7), the first shut-off valve (3), the second shut-off valve (8), the third shut-off valve (6), the first pressure gauge (4) and the second pressure gauge (5) are connected with the controller (20) respectively.
2. The automated process off-gas field collection system of claim 1, wherein, The first ionization chamber (10) is provided with a first electrometer (14).
3. The automated process off-gas field collection system of claim 1, wherein, The tail gas bottles are configured to be not less than four groups.
4. The automated process off-gas field collection system of claim 1, wherein, The tail gas bottles are connected with the first pressure gauge (4) through a fourth shut-off valve.
5. The automated process off-gas field collection system of claim 1, wherein, All the first shut-off valves (3) are configured to be electrically interlocked.
6. The automated process off-gas field collection system of claim 1, wherein, The cabinet (1) is also included, and the first mechanical pump (11), the first ionization chamber (10), the mass flow meter (9), the compression pump (7) and the controller (20) are located in the cabinet (1) respectively.
7. The automated process off-gas field collection system of claim 6, wherein, The cabinet (1) is provided with a cooling fan (16).
8. The automated process off-gas field collection system of claim 6, wherein, The cabinet (1) is provided with a display screen (17) connected with the controller (20).
9. The automated process off-gas field collection system of claim 6, wherein, The cabinet (1) and the tail gas bottles are respectively provided with casters (21).
10. The automated process off-gas field collection system of claim 1, wherein, The second mechanical pump (12) and the second ionization chamber (13) are also included, the second mechanical pump (12) is connected with the second ionization chamber (13), the second ionization chamber (13) is in communication with the ambient gas, and the second ionization chamber (13) is also provided with a second electrometer (15).