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

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...

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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

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