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Low-pressure thermodynamic equilibrium method of pressure reduction system

A thermodynamic balance and low-pressure technology, which is applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as difficulty in smooth operation, high maintenance cost, and difficult operation, so as to improve system safety and reliability, reduce Hardware and maintenance costs, the effect of low hardware and maintenance costs

Active Publication Date: 2019-01-01
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the non-fixed bed hydrogenation unit currently under construction or already in operation, since its feed is a mixture of heavy oil (coal tar, atmospheric residue, vacuum residue, catalytic oil slurry, fuel oil, etc.) and additives, or heavy oil The mixture with coal powder (oil-coal slurry), the pressure-reducing valve group with high heat fraction to heat low fraction is under the working conditions of high temperature, high pressure difference, and high solid content, and is easily damaged by erosion and abrasion, and there are different degrees of The problem of wear and tear requires switching and maintenance in a few hours at a time and a few months at a time. The operation is difficult, the maintenance cost is high, the safety hazard is large, and it is difficult to run smoothly.

Method used

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  • Low-pressure thermodynamic equilibrium method of pressure reduction system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The medium pressure of the heat balance system (8) is lower than the medium pressure of the main process pipeline.

[0063] When the decompression system performs upstream flushing, warming up hot standby, and cooling processes, first close the first upstream shut-off valve (2), the second upstream shut-off valve (3), the pressure reducing valve (4), and the second downstream shut-off valve. valve (5) and the first downstream cut-off valve (6). The thermodynamic balance medium is injected from the connection point II (82), the second upstream shut-off valve (3) is opened, and the thermodynamic balance medium is discharged from the connection point I (81). Optionally, the thermodynamic balance medium is injected from the connection point III (83), the pressure reducing valve (4) and the second upstream cut-off valve (3) are opened, and the thermodynamic balance medium is discharged from the connection point I (81).

[0064] When the decompression system performs downstr...

Embodiment 2

[0066] The medium pressure of the heat balance system (8) is lower than the medium pressure of the main process pipeline.

[0067] When the decompression system performs downstream flushing, heating hot backup, and cooling processes, first close the first upstream shut-off valve (2), the second upstream shut-off valve (3), the pressure reducing valve (4), and the second downstream shut-off valve. valve (5) and the first downstream cut-off valve (6). The thermodynamic balance medium is injected from the connection point II (82), the pressure reducing valve (4) is opened, and the thermodynamic balance medium is discharged from the connection point III (83).

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Abstract

The invention relates to the technical field of coal chemical and petrochemical equipment, in particular to a low-pressure thermodynamic equilibrium method of a pressure reduction system. The method comprises the following steps that I, the pressure reduction system is determined; II, upstream operation is performed; and III, downstream operation is performed. The low-pressure thermodynamic equilibrium method is applicable to the pressure reduction system under working conditions of the high temperature and the high pressure, the hardware and maintenance costs can be reduced, and the safety and the reliability of the system can be improved; and most pipelines and equipment belong to the low-voltage level, the potential safety accident rate is low, and the hardware and maintenance costs arelow.

Description

technical field [0001] The invention belongs to the technical field of coal chemical and petrochemical equipment, and in particular relates to a low-pressure thermodynamic balance method of a decompression system. Background technique [0002] For the non-fixed bed hydrogenation unit currently under construction or already in operation, since its feed is a mixture of heavy oil (coal tar, atmospheric residue, vacuum residue, catalytic oil slurry, fuel oil, etc.) and additives, or heavy oil The mixture with coal powder (oil-coal slurry), the pressure-reducing valve group with high heat fraction to heat low fraction is under the working conditions of high temperature, high pressure difference, and high solid content, and is easily damaged by erosion and abrasion, and there are different degrees of For wear and tear problems, it takes a few hours and a few months at the longest to perform switching maintenance. The operation is difficult, the maintenance cost is high, the safety...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D3/01F17D1/08
CPCF17D1/08F17D3/01
Inventor 王建强郑晓东杜大喜孙志强邓亮高阳尉馨婷
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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