Coal catalytic gasification safety monitoring system and monitoring method thereof

Abstract

The invention discloses a coal catalytic gasification safety monitoring system. The system comprises a coal catalytic gasification device, a detection mechanism, a PLC and an execution mechanism. Thepositions of various detection devices are reasonably arranged, the operation condition can be detected in real time, and possible risks can be predicted; the number of various detection devices is reasonably set, so the accuracy of risk prediction is improved, misoperation is avoided, the whole process is automatically controlled, the safe and stable operation of the system is ensured, and the construction of a coal catalytic gasification technology industrial device can be realized. The invention further discloses a monitoring method of the coal catalytic gasification safety monitoring system. All the detected parameters are compared with preset parameter values, reasonable logic judgment is carried out, and when abnormal conditions occur, stopping action can be executed in time to avoiddangerous accidents; and various preset parameter values are set reasonably and accurately, so that parking caused by misoperation can be effectively avoided.

Description

Technical field: [0001] The invention relates to the field of coal chemical industry, in particular to a coal catalytic gasification safety monitoring system and a monitoring method thereof. Background technique: [0002] Coal catalytic gasification technology is an important way of clean and efficient utilization of coal. Using coal catalytic gasification technology, coal is mixed with water vapor (H 2 O), oxygen (O 2 ) The gasification agent composed of the catalyst undergoes a gasification reaction under the catalytic action of the catalyst to generate high-concentration methane (CH 4 ). Compared with other coal gasification technologies, coal catalytic gasification technology has the advantages of high methane content and low temperature required for gasification reaction. At present, the coal catalytic gasification technology is still in the simulation stage after years of testing, and there is no corresponding industrial device. Due to the harsh process conditions ...

AI Technical Summary

Problems solved by technology

Due to the harsh process conditions of coal catalytic gasification technology, accompanied by chemical reactions, heat transfer, and mass transfer, if leakage, overtemperature, overpressure, etc. occur during the production process, serious consequences will inevitably occur: in the production process of coal catalytic gasification In the process, raw coal, oxygen and steam react in a fluidized bed reactor at 750°C to generate crude synthesis gas, which contains hydrogen, carbon monoxide, hydrogen sulfide and carbon dioxide, etc.; when overtemperature, overpressure, Leakage, crude synthesis gas can cause fire, and carbon monoxide and hydrogen sulfide can also cause personnel poisoning; and because the pulverized coal feeding, ash and fly ash discharging of the fluidized bed reactor are all intermittent operations, the gate electrode in the system It is easy to cause wear and tear to cause leakage of the process medium, which may cause dangerous accidents such as fire and explosion; improper ratio of coal powder, steam and oxygen will also cause over-temperature explosion accidents; during shutdown, if oxygen continues to enter the fluidized bed reactor, When it encounters the combustibles left in the furnace, it will also explode inside the equipment; in addition, when the raw material pressure is low, it will also cause the material in the fluidized bed reactor to flow backwards, causing fire and explosion

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