A coal chemical power polygeneration system based on calcium-based compounds

Abstract

The invention discloses a power multi-generation system based on a calcium-based compound and used in coal chemical industry. The system comprises a coking unit 1, a calcium carbide unit 2, an acetylene unit 3, a chemical chain reduction and desulfuration unit 4, a chemical chain oxidization unit 5, a roasting unit 6, a water steam reforming hydrogen production unit 7, a gas / steam united circulation unit 8 and a CO2 capture and storage unit 9. According to circular conversion of the system based on the calcium-based compound, efficient energy utilization and substance conversion are achieved.Compared with an existing process, the system directly uses calcium carbide furnace tail gas and coke oven gas as fuel, energy loss is reduced, and the treatment cost is saved; by adopting a chemicalchain combustion adopting mode, the fuel fire loss is reduced, meanwhile CO2 is captured, and greenhouse gas discharge is reduced; carbide slag is used as a desulfurizing agent, a chemical chain combustion oxygen carrier and a reforming hydrogen production absorbent, waste utilization is achieved; fuel gas produced after chemical chain combustion is used for combined cycled power generation, and the power generation efficiency of the system is improved.

Description

technical field [0001] The invention relates to a coal chemical power polygeneration system, which belongs to the technical fields of energy, electric power and chemical industry, and specifically relates to a coal chemical power polygeneration system based on calcium-based compounds. Background technique [0002] Coal-based calcium carbide acetylene route, as an important basic chemical raw material production method in China, still plays an irreplaceable role in my country's economic development. However, the current electrothermal process used in calcium carbide production has high energy consumption. At the same time, the by-products of calcium carbide furnace tail gas and carbide slag are difficult to utilize, which not only causes huge energy loss, but also causes serious harm to the environment, which has become an important factor restricting the development of the calcium carbide industry. [0003] In recent years, in order to reduce the energy consumption and poll...

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Problems solved by technology

[0005] The purpose of the present invention is based on the cyclic transformation of calcium-based compounds, coupling coal-based coke / calcium carbide / acetylene production, coke oven gas reforming hydrogen production, tail gas chemical looping combustion and desulfurization, power generation and CO 2 Capture and other processes, build an efficient and clean coal-based chemical power polygeneration system to solve the current problems of high energy consumption and heavy pollution in the calcium carbide acetylene industry, and provide energy efficient, clean utilization and CO 2 Low-energy capture provides theoretical and technical support

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