Microwave calcium carbide furnace reactor and method for preparing calcium carbide by using same

Abstract

The invention discloses a microwave calcium carbide furnace reactor. The microwave calcium carbide furnace reactor comprises a microwave reaction furnace body, wherein the microwave reaction furnace body comprises a microwave energy gathering cavity, a shell and an insulating layer positioned between the shell and the energy gathering cavity; a reaction chamber for materials is formed in the microwave energy gathering cavity; a material insulating reaction system is arranged inside the reaction chamber; an air exhausting system and a temperature monitoring system are arranged on the energy gathering cavity; the microwave calcium carbide furnace reactor further comprises a microwave energy generating system for conducting microwave into the energy gathering cavity, namely the reaction chamber; a water circulating cooling system is further connected to the microwave energy generating system and the microwave energy gathering cavity. The invention further provides a method for preparing calcium carbide by using the calcium carbide furnace reactor. Through use of microwave heating, the heat and mass transfer process between the reaction materials can be intensified, so that the formation temperature of the calcium carbide is greatly reduced, and the calcium carbide is synthesized at a relatively low temperature of 1600-1900 DEG C; the reaction speed is high, the energy utilizationrate is high, operation is convenient, dust pollution is free, and the problems of high investment, high pollution and high energy consumption of an arc calcium carbide furnace are solved.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a microwave calcium carbide furnace reactor and a method for preparing calcium carbide using the same. Background technique [0002] China is a country poor in oil and rich in coal, and coal is an important basic energy and industrial raw material for our country. Reducing the proportion of coal's primary energy consumption and improving the level of coal chemical industry are effective means for the green development of black coal and the low-carbon development of high-carbon resources. Calcium carbide (calcium carbide) is the key intermediate and basic chemical raw material of coal chemical industry, mainly used to produce chemical products such as acetylene. More than 80% of PVC manufacturers in my country use calcium carbide acetylene as raw material. At present, coal-to-calcium carbide and coal-to-methanol are the two main approaches of my countr...

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Problems solved by technology

The electric arc process requires the use of block raw materials with a certain particle size, and the mass transfer and heat transfer between raw materials need to be strengthened at high temperatures. Therefore, the high temperature and long time of calcium carbide production lead to large power consumption, low output, high raw material requirements, and dust. Large and difficult exhaust gas treatment

Although the market demand for calcium carbide continues to expand, the production technology of calcium carbide has the disadvantages of "high investment, high pollution, and high energy consumption", which does not meet the requirements of energy saving, emission reduction and sustainable development, which seriously restricts the development of the calcium carbide industry.

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