Device for processing preparation of hydrocarbon by utilizing liquefied gas

A technology of liquefied gas and dry gas, which is applied in the fields of hydrocarbon cracking, production of liquid hydrocarbon mixture, organic chemistry, etc. It can solve problems such as uncoordinated operation of the device, high content of aromatic hydrocarbon impurities, and low content of propylene in the raw material gas of gas separation.

Active Publication Date: 2014-04-30
SHANDONG ORIENT HONGYE CHEM
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] This method has high requirements on equipment and heat energy, especially when separating isobutane in the de-isobutanizer tower, 200 layers of trays are needed, the height of the whole tower reaches 160 meters, and the temperature at the top of the tower is not lower than 50°C. The thermal conditions are harsh, the energy consumption is high, accounting for 50% of the total energy consumption, the operation of the device is uncoordinated, and the quality of the isobutane product cannot meet the requirements; at the same time, the content of propylene in the raw gas produced is low, only 15%, resulting in the downstream gas Unstable operation of sub-device
At the same time, the aromatic hydrocarbon impurity content after the aromatization reaction is high, the market competitiveness of the product is weak, and the price is low

Method used

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  • Device for processing preparation of hydrocarbon by utilizing liquefied gas

Examples

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Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1, a kind of technology that utilizes liquefied gas processing to produce hydrocarbons, comprises the following steps:

[0069] (1) Cracking reaction process:

[0070] The C4 raw material in the cracking raw material tank is transported to the device area by the raw material pump, and exchanges heat with the pyrolysis reaction product through the first heat exchanger and the second heat exchanger. After the heat exchange, the C4 raw material enters the heating furnace to further raise the temperature To 500°C, the heated gas enters from the top of the cracking reactor to carry out the cracking reaction;

[0071] From the bottom of the cracking reactor, the cracking reaction product passes through the second heat exchanger, the first heat exchanger, the hot water heat exchanger, and the reaction product cooler (reaction condenser) for heat exchange and cooling until the temperature drops to 40 After ℃, it enters the gas-liquid separation tank for separation (...

Embodiment 2

[0094] Example 2, like figure 1 As shown, a device for realizing the process of utilizing liquefied gas to process hydrocarbons as described in Example 1 includes a cracking reaction system, an absorption stabilization system, an aromatization reaction system, a gas separation raw material gas concentration system, and an aromatics purification system.

[0095] The cracking reaction system includes: raw material pump 1, first heat exchanger 2, second heat exchanger 3, heating furnace 4, cracking reactor 5, reaction product cooler 6, hot water heat exchanger 7, gas-liquid Separation tank 8, reaction liquid pump 9, rich gas compressor 10, air compressor outlet air cooler 11, air compressor outlet cooler 12, air compressor outlet liquid separation tank 13;

[0096] The outlet of raw material pump 1 is connected to the bottom nozzle of the shell side of the first heat exchanger 2, the top nozzle of the shell side of the first heat exchanger 2 is connected to the bottom nozzle of...

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Abstract

The invention discloses a device for processing preparation of hydrocarbon by utilizing liquefied gas. The device comprises a cracking reaction system, an absorption stabilizing system, an aromatization reaction system, a gas raw material gas stripping and concentrating system, and an aromatic hydrocarbon purifying system. After the process is adopted, operation of a deisobutanizer is stopped, 90 kg of standard coal is consumed to treat each ton of C4 raw materials, and the energy consumption is saved by 48.5%; the content of gas propylene in a gas raw material is high, and the mass fraction is improved from the original 15% to 50%; and the device has low requirements on equipment and heat energy, is easy to realize, and has the advantages of being simple in flow, liable to manipulate, low in energy consumption and stable in operation.

Description

[0001] This application is a divisional application with the application number 201110387102X, the application date of November 29, 2011, and the title of the invention "a process and device for processing hydrocarbons by utilizing liquefied gas". technical field [0002] The invention relates to a liquefied gas deep processing device, in particular to a device for processing and producing hydrocarbons by utilizing liquefied gas, belonging to the field of processing and producing hydrocarbons of liquefied gas. Background technique [0003] There are many methods for the processing and separation of liquefied gas used in chemical production. At present, there is mainly one kind commonly used in the industry: first pretreatment of raw materials, the C2C3 components in the liquefied petroleum gas are extracted from the top of the depropanizer, and the mixed C4 components at the bottom of the tower enter the deisobutanizer , the isobutane is separated from the top of the deisobu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/04C07C7/11C07C7/05C07C11/06C07C15/00C07C2/00C10G50/00
Inventor 王峰忠高丰宝张志田牟怀堂刘路路
Owner SHANDONG ORIENT HONGYE CHEM
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