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External heating reaction system and method for preparing ethylene

A technology of external heating and ethylene, which is applied in chemical instruments and methods, hydrogenation hydrocarbon production, purification/separation of hydrocarbons, etc. It can solve the problems of more green oil, low catalyst utilization rate, and difficult internal heat, etc., to achieve easy heat transfer, The effect of simple and easy operation of the reaction system and method

Inactive Publication Date: 2016-08-31
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a reaction system and method for preparing ethylene with external heating, so as to solve the problems in the prior art that the internal heat is not easy to be transmitted, there is more green oil, and the utilization rate of the catalyst is low.

Method used

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  • External heating reaction system and method for preparing ethylene
  • External heating reaction system and method for preparing ethylene
  • External heating reaction system and method for preparing ethylene

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preparation example Construction

[0036] like image 3 Shown is an externally heated reaction system for preparing ethylene, which includes: the slurry bed reactor 10 mentioned in the above description, a solvent heater 20, a condenser 30, a condensation separator 40, a condensate storage tank 50, and a solvent pump 60. Filtration equipment 70 and green oil removal system 80. The solvent heater 20 communicates with the slurry bed reactor 10 through the solvent vapor inlet, the filter device 70 communicates with the slurry bed reactor 10 through the liquid outlet, and the condenser 30 communicates with the slurry bed reactor 10 through the liquid outlet. The gas outlet is communicated with the slurry bed reactor 10, and the solvent pump 60 is communicated with the slurry bed reactor 10 through the liquid inlet; the condenser 30, the condensation separator 40, the condensation The liquid storage tank 50 and the solvent pump 60 are connected in sequence; the filtering device 70 , the green oil removal system 80 ...

Embodiment 1

[0055] Adopt the system for the selective hydrogenation of acetylene to produce ethylene in the embodiment such as image 3 shown. The system structure is in the form introduced in the above-mentioned embodiment. The operating pressure of the system is 0.25MPa and the temperature is 130°C. Nitrogen can be used as the gas source to establish a gas-liquid flow with the catalyst-containing solvent in the slurry bed reactor; then, gradually turn on the solvent heater (the pressure in the solvent heater is 0.27MPa) to establish a steam updraft. When the steam rises to the top of the reactor to cool and reflux, and the temperature is stable, nitrogen can be gradually converted into a mixture of hydrogen and acetylene and fed into the reactor. In the reactor, acetylene and hydrogen are catalyzed by the catalyst to generate ethylene; the reacted gas passes through the condenser 30 and the condensation separator 40 to condense the solvent in the gas, and then sends it out of the reac...

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Abstract

The invention relates to an external heating reaction system and method for preparing ethylene. The system comprises a slurry bed reactor, a condenser, a condensation separator, a condensate storage tank, a solvent pump, a filter device, a green oil removal system and a solvent heater. The slurry bed reactor comprises a shell and a screen plate. A reaction gas inlet, a solvent steam inlet and a liquid outlet are formed in the lower portion of the shell. A gas outlet and a liquid inlet are formed in the upper portion of the shell. The screen plate is located inside the shell, fixed to the inner wall of the shell and located below the liquid inlet and above the reaction gas inlet and the solvent steam inlet. The invention further provides a method utilizing the system for preparing ethylene. The method comprises the steps that acetylene and hydrogen mixed gas is sent into the slurry bed reactor to be subjected to a reaction; ethylene is obtained through condensation and separation of the gas obtained after the reaction; a catalyst obtained through filtering can be recycled. According to the external heating reaction system and method, the problems that according to existing ethylene preparation equipment, internal heat is not likely to be transmitted out, and the catalyst utilization rate is low can be effectively solved.

Description

technical field [0001] The present invention generally relates to the field of ethylene preparation, in particular to an externally heated reaction system and method for preparing ethylene. Background technique [0002] Ethylene is an important basic raw material in modern industry and one of the world's largest output chemicals. Its products are widely used in national economy, people's life, national defense and other fields. It is the "mother of organic synthesis". Facing the shortage of oil resources and rising international oil prices, the source of raw materials has become a bottleneck in the development of the ethylene industry, and it is also a problem that must be solved before people. Therefore, research and development of a new process technology to prepare ethylene, so that it can replace petroleum as an industrial raw material, can alleviate the dependence of modern industry on petroleum. [0003] In coal chemical technology, it has become a mature process to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/09C07C11/04C07C7/00B01J8/22B01J8/18
CPCC07C5/09B01J8/1836B01J8/22B01J2208/00371B01J2208/0084C07C7/005C07C11/04
Inventor 苏二强史雪君余海鹏刘周恩吴黎阳吴道洪
Owner SHENWU TECH GRP CO LTD
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