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Device, system and process method for preparing olefin through reaction of carbon dioxide and light alkane

A technology of carbon dioxide and low-carbon alkanes, applied in the field of conversion and utilization of carbon dioxide, can solve the problems of heat transfer limitation, large output, waste of energy and raw materials, etc.

Pending Publication Date: 2019-12-27
南京荣欣化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the constant temperature reaction furnaces used in industry are integral cylindrical reaction tubes. The heating furnace heats the outer wall of the reaction tube, and the reaction gas enters the reaction tube for constant temperature reaction. However, for industrial production, the output is large and the reaction The tube diameter is large, limited by heat transfer conditions, the temperature at different positions in the reaction tube is not uniform, and the reaction temperature is not easy to control
However, for the process of preparing olefins and other products by reacting carbon dioxide and low-carbon alkanes, the industry only involves simple separation of the reaction and products, and the purity of the olefins obtained is not high, and the waste heat and waste materials generated by each step of treatment are not effectively utilized, resulting in waste of energy and raw materials

Method used

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  • Device, system and process method for preparing olefin through reaction of carbon dioxide and light alkane
  • Device, system and process method for preparing olefin through reaction of carbon dioxide and light alkane
  • Device, system and process method for preparing olefin through reaction of carbon dioxide and light alkane

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Effect test

Embodiment 1

[0075] Such as figure 1 , 2 As shown, the device for preparing olefins by reacting carbon dioxide and light alkanes in this embodiment includes a feed port 1, a feed preheating furnace 2 and a reaction furnace 3, and a feed port 1 and a feed preheating furnace 2 The inlet of the feed preheating furnace 2 is connected with the inlet of the reactor 3, the inlet of the reactor 3 is provided with a first gas distributor; the reactor 3 includes a reactor shell 31, and the reactor shell 31 is provided Multi-layer heating zone, the heating zone is surrounded by the first heating wall 32; in each heating zone there are multiple rows of reaction tubes 33 in parallel, one end of each reaction tube 33 is connected to the first gas distributor, and the other end is connected to the outlet of the reaction tube Connection; a first heating nozzle 34 is set between the reaction tubes 33.

[0076] Carbon dioxide and low-carbon alkanes are fed through the feed port 1, enter the feed preheating fur...

Embodiment 2

[0081] The device for preparing olefins by the reaction of carbon dioxide and light alkanes in this embodiment is further improved on the basis of the device for preparing olefins by the reaction of carbon dioxide and light alkanes in Example 1. The structure of the rest of the device is the same as that of Example 1. The structure is the same, but the difference is that the device for preparing olefins by reacting carbon dioxide and low-carbon alkanes in this embodiment also includes a feeding mixer 6 suitable for mixing carbon dioxide, low-carbon alkanes and steam, and the feeding mixer 6 is provided with steam The inlet, the inlet of the feeding mixer 6 is connected with the outlet of the feeding preheating furnace 2, and the outlet of the feeding mixer 6 is connected with the inlet of the reactor 3. The mixed gas of carbon dioxide and low-carbon alkanes preheated by the feed preheating furnace 2 enters the feed mixer 6, and is mixed with the steam injected from the steam inl...

Embodiment 3

[0117] The process method for preparing ethylene by the reaction of carbon dioxide and ethane in this embodiment is the same as that in Embodiment 2. The difference is that in this embodiment, in step S1, the molar ratio of carbon dioxide to ethane is 1.2:1 , The reaction temperature is 700℃, and the ethane space velocity is 1300h -1 .

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Abstract

The invention provides a device, a system and a process method for preparing olefin through reaction of carbon dioxide and light alkane. The device for preparing olefin through reaction of carbon dioxide and light alkane comprises a feeding port, a feeding preheating furnace and a reaction furnace, wherein the feeding port is connected with an inlet of the feeding preheating furnace, wherein an outlet of the feeding preheating furnace is connected with an inlet of the reaction furnace, and a first gas distributor is arranged at an inlet of the reaction furnace; the reaction furnace comprises areaction furnace shell, wherein multiple layers of heating areas are arranged in the reaction furnace shell, and each heating area is defined by a first heating wall; multiple rows of reaction tubesare arranged in each layer of heating area in parallel, wherein one end of each reaction tube is connected with the first gas distributor, and the other end is connected with an outlet of the reactionfurnace; and a plurality of first heating nozzles are arranged between the reaction tubes. In the device, the system and the process method for preparing the olefin through the reaction of the carbondioxide and the light alkane, the temperature distribution of the reaction device is uniform, the temperature is easy to control, the reaction system and the process method effectively utilize wasteheat and waste materials generated in each step, and energy and raw material waste is reduced.

Description

Technical field [0001] The invention belongs to the technical field of carbon dioxide conversion and utilization, and specifically relates to a device, system and process method for preparing olefins by reacting carbon dioxide with low-carbon alkanes. Background technique [0002] With the development of modern industry, global energy consumption continues to increase sharply. Carbon dioxide emissions have grown from 40 million tons before the industrial revolution to 6.04 billion tons in 1996. By 2100, the total global carbon dioxide emissions are expected to increase to 36 billion tons. Tons, the unsustainable energy production and development model makes the global environment face a severe crisis. With the development of industry, carbon dioxide is increasing day by day, exacerbating the deterioration of human living environment, and gradually reducing greenhouse gas emissions has become the consensus of most scientists and government agencies. [0003] As an important chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/42C07C7/00C07C7/04C07C7/11C07C7/167C07C11/02C07C11/04C07C11/06C01B3/34
CPCC07C5/42C07C7/005C07C7/11C07C7/04C07C7/167C01B3/34C07C11/02C07C11/04C07C11/06Y02P20/129
Inventor 王涛江南徐龙伢孙海兵林毓勇朱向学肖镱陈福存黄敏江起培严正芳李刚王翔李旭东
Owner 南京荣欣化工有限公司
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