Tritium-containing exhaust gas discharge monitoring automatic sampling system
An automatic sampling and exhaust gas emission technology, applied in sampling devices and other directions, can solve the problems of not being able to truly and objectively reflect the emission source items of tritium-containing exhaust gas, infeasible, unable to reflect the discharge conditions of tritium-containing exhaust gas, etc., so as to improve the efficiency of sampling work. , reduce labor intensity and improve the effect of obtaining representative
Inactive Publication Date: 2013-04-24
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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Problems solved by technology
According to the current effluent monitoring mode, whether it is regular sampling or continuous sampling, it is not feasible to monitor the emission of tritium-containing exhaust gas. It cannot reflect the working conditions of tritium-containing exhaust gas emissions in tritium-related operating sites, and the monitoring results cannot truly and objectively reflect the number of workers. Tritium-containing exhaust emission source term
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Embodiment 1
[0018] figure 1 It is a schematic diagram of the structure of the present invention. exist figure 1 Among them, the automatic sampling system for tritium-containing waste gas emission monitoring of the present invention includes an automatic control unit 1, a full tritium sampler 14, a flow regulating valve 4, a first solenoid valve 15, a second solenoid valve 16, a Three electromagnetic valves 17, the fourth electromagnetic valve 18, the first dust filter 13, the second dust filter 19, the mass flow meter 21, the pressure gauge 22, the pump I23 and the pump II24, also include the intake pipe arranged outside the sampling cabinet Joint 6, purge pipe joint 7, exhaust pipe joint 8 and pump III20; Its connection relation is, the inlet pipe joint 6 that is arranged on the outside of sampling cabinet 9 connects one end of flow control valve 4 and first electromagnetic valve 15 successively through air pipe , the other end of the first electromagnetic valve 15 is respectively conn...
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The invention provides a tritium-containing exhaust gas discharge monitoring automatic sampling system and belongs to the technical fields of radiation protection and environmental protection. The air inlet tube joint in the sampling system is connected with a flow control valve, solenoid valves, dust filters, a mass flow meter and a pressure meter through a gas tube and then is connected with the gas inlets of pumps, and the gas outlets of the pumps are connected with the joints of an exhaust tube through exhaust tubes; the gas inlet and the gas outlet of a total tritium sampler are connected with a gas collection tube and the exhaust tube through flexible tubes respectively; and the signal input end of an automatic control unit is in external connection with a chimney flow monitoring PLC controller, and the signal output end of the automatic control unit is connected with the total tritium sampler, the flow control valve, the solenoid valves, the mass flow meter, the pressure meter and pumps respectively. The sampling system which allows the sampling precision to be less than 1min has the advantages of intelligent regulation and control, strong practicality, improvement of the fragmentary discharge of a tritium effluent, improvement of the representativeness of a tritium monitoring sample when the concentration difference is large, mitigation of the labor intensity of an effluent monitoring sampling personnel, and improvement of the working efficiency.
Description
technical field [0001] The invention belongs to the technical field of radiation protection and environmental protection, and in particular relates to an automatic sampling system for monitoring the discharge of tritium-containing exhaust gas, in particular to an automatic sampling system for monitoring the source of tritium-containing exhaust gas when it is discharged from a chimney. It is suitable for tritium gas and tritiated water sampling for the monitoring of tritium-containing waste gas to the environment emission source items in tritium operating glove boxes, secondary containment systems, tritium purification treatment systems, nuclear power plant workshops and other places. Background technique [0002] At present, there are two main ways to monitor tritium emission sources in airborne effluents, one is online measurement through fixed tritium monitors, and the other is offline analysis and measurement in laboratories after bubbling collection or condensation collec...
Claims
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IPC IPC(8): G01N1/24G01N1/14
Inventor 周银行余卫国胥全敏林青川张玉川丁兰岚郭洪波钟志京王和义周才洁
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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