Separation and pressure reduction combining system for suspended bed hydrocracking reaction products

Abstract

The invention provides a separation and pressure reduction combining system for suspended bed hydrocracking reaction products. The system comprises a heat high-pressure separator, a pressure relief valve bank and a heat low-pressure separator, wherein a feeding hole for the suspended bed hydrocracking reaction products is formed in the upper part of the heat high-pressure separator; a cold hydrogen feeding hole is formed in the lower part of the heat high-pressure separator; a heat high-pressure separating gas outlet is formed in the top part of the heat high-pressure separator; a heat high-pressure separating liquid outlet is formed in the bottom of the heat high-pressure separator; the pressure relief valve bank comprises at least one set of valve bank; each set of valve bank comprises a venturi throttling element and an angle adjusting valve which are communicated with each other; a heat low-pressure feeding hole is formed in the upper part of the heat low-pressure separator; a heat low-pressure separating gas outlet is formed in the top of the heat low-pressure separator; a heat low-pressure separating liquid outlet is formed in the bottom of the heat low-pressure separator; the heat high-pressure separating liquid outlet is communicated with the venturi throttling element of the pressure relief valve bank; and the angle adjusting valve is communicated with the heat low-pressure feeding hole. The invention also provides a pressure reduction and separation method for the suspended bed hydrocracking reaction products by using the separation and pressure reduction combining system.

Description

technical field [0001] The invention relates to a suspension bed hydrocracking reaction product separation and decompression combination system, which belongs to the technical field of coal and petrochemical industry. Background technique [0002] In the fields of coal chemical industry and petrochemical industry, high temperature and high pressure fluid gas-liquid or gas-liquid-solid mixture separation and decompression systems are widely involved, and pressure relief valves are the core components of these decompression systems. The higher the temperature and pressure of the material to be processed, the more complex the composition, the higher the requirements for the performance (mainly sealing and wear resistance) of the pressure reducing valve. [0003] When heavy oil such as residual oil and coal tar undergoes hydrocracking reaction in suspended bed, the temperature is often as high as 450-470°C and the pressure reaches tens of MPa. A large pressure difference usuall...

AI Technical Summary

Problems solved by technology

[0006] The above method improves the service life of the valve by reducing the turbulent flow of the feed liquid and improving the wear resistance of the valve material, but the core decompression component still bears most of the pressure difference, and the valve loss is still relatively fast

In addition, the method of adding a medium-pressure separator can reduce the pressure difference on the decompression parts and prolong the life of the decompression valve, but the corresponding equipment cost increases a lot, which is not economical

Images