Absorption-stabilization technique capable of enhancing absorption by using complementary energy

A stable absorption and enhanced absorption technology, applied in the petroleum industry, liquid hydrocarbon mixture recovery, hydrocarbon oil treatment products, etc., can solve the problems of limited improvement of absorption effect

Active Publication Date: 2017-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the limitation of the water temperature of the circulating water system, the improvement of the absorption effect is limited

Method used

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  • Absorption-stabilization technique capable of enhancing absorption by using complementary energy
  • Absorption-stabilization technique capable of enhancing absorption by using complementary energy
  • Absorption-stabilization technique capable of enhancing absorption by using complementary energy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Taking the absorption and stabilization unit of the 3 million tons / year coking unit as an example, the process simulation software ProⅡ is used for simulation calculation.

[0075] Simulation process such as figure 1 shown. The oil and gas from the top of the coking fractionation tower are separated into rich gas 2 and naphtha 3 in the gas-liquid separation tank 1 at the top of the tower. The rich gas 2 is boosted by the rich gas compressor 4 and mixed with the part of the absorption tower bottom oil 10 and desorbed gas 9 from the absorption tower 7 to cool down and enter the rich gas balance tank 5 . The gas phase 6 balanced by the rich gas balance tank 5 enters the bottom of the absorption tower 7; the liquid phase enters the upper part of the desorption tower 8 after being heated by the liquid phase heater 22 of the rich gas balance tank. The deethanized gasoline 24 at the bottom of the desorption tower 8 is sent to the stabilizing tower 13 for rectification, and t...

Embodiment 2

[0086] Taking the absorption and stabilization unit of the 3 million tons / year coking unit as an example, the process simulation software ProⅡ is used for simulation calculation.

[0087] Simulation process such as figure 2 . The oil and gas from the top of the coking fractionation tower are separated into rich gas 2 and naphtha 3 in the gas-liquid separation tank 1 at the top of the tower. The rich gas 2 is boosted by the rich gas compressor 4 and mixed with the part of the absorption tower bottom oil 10 and desorbed gas 9 from the absorption tower 7 to cool down and enter the rich gas balance tank 5 . The gas phase 6 balanced by the rich gas balance tank 5 enters the bottom of the absorption tower 7; the liquid phase enters the upper part of the desorption tower 8 after being heated by the liquid phase heater 22 of the rich gas balance tank. The deethanized gasoline 24 at the bottom of the desorption tower 8 is sent to the stabilizing tower 13 for rectification, and the l...

Embodiment 3

[0098] Taking the absorption and stabilization unit of the 3 million tons / year coking unit as an example, the process simulation software ProⅡ is used for simulation calculation.

[0099] Simulation process such as image 3 . The oil and gas from the top of the coking fractionation tower are separated into rich gas 2 and naphtha 3 in the gas-liquid separation tank 1 at the top of the tower. The rich gas 2 is boosted by the rich gas compressor 4 and mixed with the part of the absorption tower bottom oil 10 and desorbed gas 9 from the absorption tower 7 to cool down and enter the rich gas balance tank 5 . The gas phase 6 balanced by the rich gas balance tank 5 enters the bottom of the absorption tower 7; the liquid phase enters the upper part of the desorption tower 8 after being heated by the liquid phase heater of the rich gas balance tank. The deethanized gasoline 24 at the bottom of the desorption tower 8 is sent to the partition tower 37 for rectification, and the liquefi...

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Abstract

The invention discloses an absorption-stabilization technique capable of enhancing absorption by using complementary energy. A stabilized gasoline absorption packing section and a gasoline absorption packing section are arranged in a coking absorption tower from top to bottom; and crude gasoline and stabilized gasoline sectionally enter packing bed layers of the gasoline absorption section and stabilized gasoline absorption section. Preferably, the tower top of a reabsorbing tower is provided with a shell-and-tube vortex tube buncher, thereby converting the pressure energy of dry gas on the tower top into a cold flow and a heat flow. A dividing wall column is used for sharp separation to obtain the component with better absorbing capacity, thereby enhancing the absorption effect. The method disclosed by the invention can maximally display the absorbing capacity of stabilized gasoline for C3 and C4, enhance the absorption effect of the absorption tower and greatly lower the circulating volume of the stabilized gasoline complementary absorbent, thereby lowering the energy consumption of the system. The vortex tube buncher can recover the pressure energy formed by the dry gas pressure difference and convert the pressure energy into cold energy and heat energy, and can also optimize the absorption-stabilization technique, thereby implementing the dual effects of lowering the process energy consumption and enhancing the absorptivity.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to an absorption stabilization process, in particular to an absorption stabilization process which utilizes the residual energy of the process system itself to enhance absorption. technical background [0002] The absorption-stabilization process is an important unit component in the coking / catalysis process of the refinery. It mainly uses the method of absorption and rectification to separate the rich gas and crude gasoline from the oil-gas separation tank at the top of the coking / catalytic fractionation tower into dry gas, liquefied gas and stable gasoline with qualified vapor pressure. The absorption-stabilization process has "single tower" and "double tower" processes. The single tower process is that the absorption and desorption are carried out in the same tower, the absorption rate and desorption rate are poor, and the product quality is not good. The double-tow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G5/04
CPCC10G5/04C10G2400/02
Inventor 张龙陈建兵张英张胜中薄德臣高景山
Owner CHINA PETROLEUM & CHEM CORP
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