Coal gasification slag plasma gasification combined heat and power generation system and method thereof

Abstract

The invention discloses a coal gasification slag plasma gasification combined heat and power generation system and a method thereof. The system at least comprises a plasma gasification melting furnace, a waste heat boiler, a steam turbine, a flue gas treatment system and a resource utilization system, wherein, the plasma gasification melting furnace is used for the residual carbon gasification of coal gasification slag and the melting of inorganic substances, and harmless treatment of the coal gasification slag is realized; the waste heat boiler is used for recovering heat of high-temperature flue gas generated by the system and generating high-temperature and high-pressure steam; the steam turbine is used for generating power through high-temperature and high-pressure steam generated by the waste heat boiler, and the obtained power can be used for networking or the system; the flue gas treatment system is used for treating harmful gases such as dust in flue gas to ensure that flue gas emission reaches the standard; and the resource utilization system is used for producing resource products from the molten slurry generated by the plasma gasification melting furnace. According to the invention, recycling, harmlessness, reduction and stabilization treatment of the coal gasification slag is realized, and the problem of secondary pollution caused by landfill of the coal gasification slag is avoided.

Description

technical field [0001] The invention belongs to the technical field of coal gasification comprehensive utilization, and relates to a coal gasification slag plasma gasification cogeneration system and method, which uses coal gasification slag to realize cogeneration and power generation through plasma gasification. Background technique [0002] Coal gasification technology is the core of the development of clean and efficient coal conversion technology, the leader of coal chemical industry, and an important foundation for the development of bulk chemical products (fertilizer, methanol, natural gas, olefins, etc.), polygeneration systems, and IGCC power generation. Broken coal pressurized slag gasification technology (BGL gasifier) ​​has been paid close attention to in recent years because of its high gasification intensity, large single furnace capacity, low steam consumption, and low waste water volume. industrial applications. [0003] For example, Chinese patent CN2017108...

AI Technical Summary

Problems solved by technology

[0008] 2. Coal gasification slag is used as an additive material, but in the GB / T1596-2005 technical requirements for fly ash used in cement active mixture materials, it is stipulated that the loss on ignition is ≤ 8.0%, and the loss on ignition in fine slag generally does not meet the requirements. All are unqualified products and cannot be used as cement active mixing materials

Therefore, the gasification fine slag of coal gasification slag does not meet the material requirements for this application

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