A kind of process method of decompression system

Abstract

The invention belongs to the technical field of coal chemical industry and petrochemical industry equipment, and particularly relates to a process method for a pressure reduction system. The process method comprises the following steps that 1, basic composition of the pressure reduction system is determined, specifically, the pressure reduction system is used for high-temperature and high-pressureworking conditions and comprises a main process module, a mechanical control system, a thermodynamical balance system and an intelligent control system; 2, the work procedure of the pressure reduction system is determined, specifically, a process medium enters the main process module, under an instruction of the intelligent control system, the mechanical control system outputs torque, all valvesof the main process module are opened and closed and subjected to opening degree adjusting, thus pressure reduction of the process medium is achieved, and then the process medium flows out from the pressure reduction system; and 3, a specific process of the pressure reduction system under different working states is determined. According to the process method for the pressure reduction system, theautomation degree is high, an integral prying device can achieve unmanned-interference operation, and the operating and maintenance costs can be lowered greatly.

Description

technical field [0001] The invention belongs to the technical field of coal chemical and petrochemical equipment, and in particular relates to a process method of a decompression system. Background technique [0002] In recent years, crude oil products at home and abroad have become increasingly harsh, while the market demand for light and clean fuel oil has continued to increase. Therefore, while continuously promoting the transformation and upgrading of the refining industry and upgrading the quality of refined oil, some countries are vigorously promoting clean and efficient coal. Use to promote the technology research and development of coal-to-gas and coal-to-oil. Among them, high-efficiency energy development processes such as direct coal-to-oil production, kerosene mixing, coal tar hydrogenation, and residual oil / heavy oil hydrogenation, with non-fixed bed (suspended bed / ebullating bed, etc.) hydrogenation reactors as the core devices, are receiving more and more atten...

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Problems solved by technology

[0006] However, for the decompression system at the bottom of the hot high-pressure separator of the suspended bed or ebullated bed hydrogenation device currently under construction or already in operation, since the feed of the suspended bed or ebullated bed is heavy oil (coal tar, atmospheric residue, vacuum residue oil, catalytic oil slurry, fuel oil, etc.) and additives, or a mixture of heavy oil and coal powder (coal oil slurry), the pressure reducing valve group of the high temperature to low temperature is high temperature, high pressure difference, high solid content It is easy to be damaged by erosion and abrasion, and there are different degrees of wear problems. It takes a few hours and a few months to switch overhauls. The operation is difficult, the maintenance costs are high, the safety hazard is large, and it runs smoothly. Disaster

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