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Pressure protection system for key equipment of chemical engineering device

A technology for protecting systems and key equipment, applied in sequence/logic controller program control, electrical program control, etc., can solve the problem that high-integrity pressure protection systems rarely use chemical equipment, etc., to improve automatic protection capabilities, High reliability and less malfunction

Inactive Publication Date: 2014-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] High Integrity Pressure Protection System (HIPPS, High Integrity Pressure Protection System) is a kind of safety instrumented system, which was mostly used in long-distance pipelines and oil fields before. For example, Zheng Xiaocai introduced the application of high integrity pressure protection system in NB35-2 project , Yu Manli introduced the application of high-integrity pressure protection systems in underwater production systems, but high-integrity pressure protection systems are rarely used in chemical plants

Method used

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  • Pressure protection system for key equipment of chemical engineering device
  • Pressure protection system for key equipment of chemical engineering device
  • Pressure protection system for key equipment of chemical engineering device

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Embodiment Construction

[0026] A pressure protection system for key equipment of a chemical plant includes a safety PLC controller, an isolation circuit, an actuator, a pressure sensor, and an indication and operation panel.

[0027] The safety PLC controller is used to receive the pressure signal of the pressure sensor, make decisions and judgments, control the switch of the actuator, and complete the pressure protection function. A safety PLC with a higher SIL level is used to prevent misoperation and control failure.

[0028] The safety PLC controller includes dual redundant power supplies, triple redundant CPUs, dual redundant I / O cards and dual redundant communication components.

[0029] Further, the safety PLC controller is only composed of the above components.

[0030] The pressure sensor collects field signals, which are input to the controller through the isolation circuit, and control commands are output to the actuator through the isolation circuit, so as to realize safety protection und...

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Abstract

The invention provides a pressure protection system for key equipment of a chemical engineering device. The pressure protection system comprises a safety PLC, an isolation circuit, an actuator, a pressure sensor, and an indication and operation panel. The pressure protection system can improve the automatic protection capacity of the key equipment at the moment of overpressure, and has the advantages of being high in reliability and small in investment and reducing workloads of workers, and false operation is little.

Description

technical field [0001] The invention relates to the technical field of chemical safety control, in particular to a pressure protection system for key equipment of a chemical plant. Background technique [0002] With the development of economic and technological level, chemical equipment is increasingly developing in the direction of large-scale, complex and integrated. The equipment of some chemical plants may have the following risk factors: 1. High temperature and pressure; 2. The pressure of the equipment is greatly affected by the flow of incoming materials. If there is gas flow of incoming materials, failure of the regulating valve or misoperation, it is easy to cause overpressure of the equipment; 3. It contains a large amount of flammable and explosive materials. If the equipment is damaged and the material leaks, it may cause a major fire and explosion accident. [0003] In view of the risk factors of such devices, safety valves or rupture discs are currently instal...

Claims

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Application Information

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IPC IPC(8): G05B19/05
Inventor 高新江孙峰石宁李传坤
Owner CHINA PETROLEUM & CHEM CORP
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