Safety control method for low-temperature plasma processing of VOCs in release gas in sewage collection, storage and processing link
A low-temperature plasma and sewage collection technology, applied in various fluid ratio control and other directions, can solve the problems of complicated upstream process sewage sources, high VOCs concentration, hidden safety hazards, etc., to avoid harmful factors, meet safety requirements, and high reliability. Effects of Sex and Safety
Active Publication Date: 2019-02-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Due to the absence of a safe and reliable air distribution and interlocking system, the existing plasma treatment of exhaust gas can only be used in occasions where the VOCs content of the exhaust gas is very low, and the application is limited. Although the use range of low VOCs concentration is strictly limited, due to the upstream The source of process sewage is complicated, the composition changes greatly, and the concentration of VOCs may still be too high, exceeding the process design conditions, resulting in a great potential safety hazard in the existing plasma treatment process of VOC waste gas
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[0029] In the process of low-temperature plasma treatment of VOCs, due to the large fluctuations in the concentration of VOCs produced by the released gas from the sewage collection, storage, and treatment processes, they often exceed the lower explosive limit of combustible gas. The plasma treatment process itself generates ignition sources, so plasma is used The treatment process is prone to equipment burning and explosion accidents.
[0030] Based on the above safety hazards, the present invention provides a set of high-reliability and high-safety low-temperature plasma treatment wastewater collection, storage, and treatment links to release gas VOCs safety control method, when using plasma process to treat VOCs through strict control into low temperature The flow rate, concentration, humidity of the exhaust gas of the plasma reactor, the outlet temperature of the reactor and the concentration of combustible gas in the boundary area around the processing device ensure that the ...
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The invention discloses a safety control method for low-temperature plasma processing of VOCs in release gas in sewage collection, storage and processing link. The safety control method comprises thefollowing steps of detecting a process parameter of VOCs in an exhaust gas transmission main pipeline in real time by a process parameter transmitter, wherein the exhaust gas transmission main pipeline is connected between sewage collection, storage and processing facility and a low-temperature plasma reactor, the detected signal is transferred to a logic controller by the process parameter transmitter, an executor is indicated to do opening and closing action after the signal is analyzed by the logic controller, the executor comprises a plasma reactor inlet cutoff valve and a plasma reactor power supply relay. By combining a reliable control system and a key control parameter, a safety control method for controlling plasma processing VOCs process is formed, a hazard factor is enabled to be prevented by strictly controlling key safety process parameters such as flowing quantity, concentration, humidity and temperature during the VOCs handling process by plasma discharging, and the safety requirement is met.
Description
Technical field [0001] The invention relates to the field of release gas treatment in the collection, storage and treatment of sewage, and in particular to a safety control method for VOCs in the release gas in the collection, storage and treatment of sewage in low-temperature plasma treatment. Background technique [0002] Sewage generated in the industrial production process will emit a small amount of VOCs gas during collection, storage, and treatment, and the main components are benzene series, alkanes, olefins, etc. The benzene series in the exhaust gas are carcinogens and have obvious peculiar smell. Alkanes and olefins are flammable substances. In order to protect the health of employees, improve the air quality in the factory area, and create a green production environment, sewage tank waste gas treatment devices must be installed. The treated exhaust gas meets the standard and is discharged at high altitude. [0003] There are many ways to treat VOCs. Among them, low-temp...
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IPC IPC(8): G05D11/13
CPCG05D11/13
Inventor 唐晓丽曹德舜郭亚逢牟桂芹
Owner CHINA PETROLEUM & CHEM CORP