Method for recovering multiple components through dilute ethylene

A technology of diluting ethylene and ethylene, which is applied in the production of liquid hydrocarbon mixtures, petroleum industry, gas fuels, etc., can solve the problems of environmental pollution and waste of ethylene resources, and achieve the effect of reducing load and energy consumption.

Inactive Publication Date: 2018-02-27
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In small and medium-sized refineries, the dry gas of the catalytic cracking unit is generally used as fuel gas and enters the gas pipeline network to be used as fuel for heating furnaces and

Method used

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  • Method for recovering multiple components through dilute ethylene
  • Method for recovering multiple components through dilute ethylene
  • Method for recovering multiple components through dilute ethylene

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Embodiment Construction

[0022] Such as figure 1 As shown, the system adopted by the present invention to recover multiple components from dilute ethylene includes a catalytic cracking dry gas pipe G1 connected to the outlet of the catalytic cracking dry gas, the outlet of the catalytic cracking dry gas pipe G1 is connected to the inlet of the water washing tank V1, and the water washing tank The outlet of V1 is connected to the inlet of amine liquid adsorber V2, the outlet of amine liquid adsorber V2 is connected to the inlet of raw material buffer tank V3, the outlet of raw material buffer tank V3 is connected to the cold-dry gas tee pipe G2, and the cold-dry gas tee The upper port of the pipe G2 is connected to the cold side inlet of the first heat exchanger H1, the cold side outlet of the first heat exchanger H1 is connected to the cold side inlet of the second heat exchanger H2, and the cold side of the second heat exchanger H2 The outlet is connected to the inlet of the raw material heating furn...

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Abstract

The invention relates to a method for recovering multiple components through dilute ethylene. The method sequentially comprises the following steps of after water washing catalytic cracking dry gas containing ethylene with the concentration of 15 to 25V percent, desorbing residual ethanol amine to enable the ammonia nitrogen content in the raw material dry gas to be smaller than 100ppm; after preliminarily preheating cold dry gas through a first heat exchanger, continuously preheating through a second heat exchanger, then entering a raw material heating furnace for heating to the reaction trigger temperature, and entering a catalytic reactor for reacting to generate a fuel oil component and a liquefied petroleum gas component; feeding a reaction product into the second heat exchanger for preheating the raw material dry gas for the second time, carrying out fractionation on the cooled reaction product, pumping fractionated heavy fuel oil components out from a tower bottom of a fractionating tower, cooling through a first cooler, then feeding into a heavy fuel oil storage tank through an oil pump, and storing; distilling off a fractionated oil gas component from a gas phase outlet ofthe fractionating tower on the top part of the fractionating tower, and entering a hot side of the first heat exchanger for preheating the raw material dry gas for the first time. The method can be used for directly recovering fuel oil components, liquefied petroleum gas and other components.

Description

technical field [0001] The invention relates to a method for recovering multiple components from dilute ethylene, which belongs to the technical field of oil refining technology. Background technique [0002] Catalytic cracking is one of the main methods of petroleum secondary processing. Under the action of high temperature and catalyst, heavy oil undergoes cracking reaction and is transformed into cracked gas, gasoline and diesel oil. The main reactions are decomposition, isomerization, hydrogen transfer, aromatization, condensation, coke and so on. Compared with thermal cracking, its light oil yield is high, gasoline octane number is high, diesel oil stability is better, and liquefied gas rich in olefins is produced by-product. [0003] The dry gas yield of the existing catalytic cracking unit is 2-5%, and the dry gas contains hydrogen, ethylene, methane, ethane and other components, and the ethylene concentration is 15-25V%. In small and medium-sized refineries, the d...

Claims

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Application Information

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IPC IPC(8): C10G50/00C10L3/12
CPCC10G50/00C10L3/12
Inventor 姚日远肖传慰陈祥黄常青袁卫张楠朱秋成
Owner CHINA PETROLEUM & CHEM CORP
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