Safety interlocking protection system used for powdered coal pressure gasification process and method

Abstract

The invention provides a safety interlocking protection system used for a powdered coal pressure gasification process. The system comprises: a detection unit (A1), used for detecting abnormal conditions of a powdered coal pressure gasification system (B); a control unit (A2), used for triggering corresponding emergency operations of safety interlocking protection to the powdered coal pressure gasification system (B) according to the detected abnormal conditions detected by the detection unit (A1); an execution unit (A3), used for executing the corresponding emergency operations of safety interlocking protection to the powdered coal pressure gasification system (B) according to triggering of the emergency operations by the control unit (A2); the implementation of the said pulverized coal pressurized gasification system (B) the emergency operation of the safety interlocking protection; and a sequence of event (SOE) recording unit (A4), used for acquiring and recording the abnormal conditions. The safety interlocking protection system provided by the invention has the advantages of high safe reliability, strictly designed program logic, and sequence of event recording function.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a safety interlock protection system and method for pulverized coal pressurized gasification process. Background technique [0002] Pulverized coal pressurized gasification technology is an advanced coal gasification technology at present. It is characterized in that the crushed coal from the raw coal storage bin is added to the coal mill to be ground into powder, dried by high-temperature inert airflow, and then pressurized. It is transported to the gasifier, and undergoes a high-temperature combustion reaction with pure oxygen from air separation in the furnace to generate crude synthesis gas, which can be used as raw material gas for subsequent stages, and can be widely used in coal-based methanol, coal-based synthetic ammonia, coal-based natural gas, coal Synthetic oil, coal to olefins, coal to hydrogen, IGCC power generation and other fields. The two major ra...

AI Technical Summary

Problems solved by technology

[0003] If the hardware platform of the safety interlock protection system adopts a distributed control system (DCS), due to the long scan period of the DCS, slow system response, and no sequence of events (SOE) function, it cannot meet the requirements

If an independently set programmable logic controller (PLC) is used, although its scan cycle is short, the system responds quickly, and it has the function of sequence of events recording (SOE), when the system fails, such as the controller, power supply, etc., the entire system will be damaged. Will not work, there is a major safety hazard

If multiple sets of programmable logic controllers (PLCs) are used, for example, three sets of PLCs are used to form a two-out-of-three voting system. This solution requires system hardware integration and secondary development of software. Obtain the corresponding SIL safety level certification, so it cannot be widely used

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