Storage tank oil and gas recovery safety control system and control method

Abstract

The invention relates to the technical field of recycling of storage tank oil gas, and relates to a control system for recycling safety of storage tank oil gas and a control method thereof. The control system for recycling safety of storage tank oil gas comprises storage tanks, a liquid separation tank, a compressor, a separation tank, an oil gas recycling device and a buffer tank, wherein an oil gas adjusting valve is arranged on a connection pipeline of the liquid separation tank and the compressor; an oxygen content analysis device is arranged between the oil gas adjusting valve and the liquid separation tank; high pint venting is arranged between the oxygen content analysis device and the oil gas adjusting valve; a venting switch valve is arranged on a high pint venting connection line; a circulating gas switch valve and a venting gas pipeline are arranged on a connection pipeline of an outlet of the oil gas recycling device and the buffer tank; and a venting gas adjusting valve is arranged on the venting gas pipeline. According to the control system, a two-stage split-range control technology is adopted, the oxygen content in the circulating oil gas is controlled, and air is prevented from producing explosive gases; and the storage tanks are protected through multiple measures, intrinsic safety of the oil gas recycling device is achieved, and safe and reliable operation of the storage tanks is guaranteed.

Description

technical field [0001] The invention relates to the technical field of storage tank oil gas recovery, in particular to a storage tank oil gas recovery safety control system and a control method thereof. Background technique [0002] Some of the gas pollutants in petrochemical enterprises come from the unorganized exhaust gas of oil storage tank farms. These pollutants are discharged into the atmosphere, which not only causes certain economic losses, but also because of the high concentration and is difficult to decompose and dilute. It directly causes air pollution and also poses a hazard to human health. In recent years, with the gradual enhancement of people's awareness of environmental protection, the country and enterprises have paid more and more attention to environmental pollution issues, reducing the emission of gas pollutants in oil storage tank farms is an important means to protect the environment and improve the economic benefits of enterprises. [0003] Existin...

AI Technical Summary

Problems solved by technology

Although the existing design will take safety measures such as emergency shut-off valves and check valves, it is difficult to ensure that there is no risk of failure, and the oxygen content in the system cannot be reliably detected and controlled, and the existing oil and gas recovery process and explosion-proof performance of the storage tank are not good. Perfect, not intrinsically safe

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