Screw expander dragged sintering wast heat power generation system and method

Abstract

The invention discloses a screw expander dragged sintering wast heat power generation system and method. The system comprises a vertical sinter cooling device, a sintering machine, a bellows, a main flue, a dust collector, a first electric fan, a first fan, a first screw expander, a heat pipe waste heat boiler, a steam supplementing and condensing type steam turbine, a chimney, a generator, a condenser, a first water pump, a second water pump, a third water pump, a deaerator, a fourth water pump, a fifth water pump, a dual-intake dual-pressure waste heat boiler, a cold air intake valve, a second electric fan, a second screw expander, a second fan, a blow off valve, another dust collector, a vertical sinter cooling device intake chamber, a vertical sinter cooling device low-temperature air outtake chamber, a vertical sinter cooling device medium-temperature air outtake chamber and a vertical sinter cooling device high-temperature air outtake chamber. By the system and method, sintering waste heat and energy can be recovered efficiently, power generation efficiency is improved, consumed energy needed for equipment operation is saved greatly, and the system and method is of great significance to energy conservation and emission reduction of iron and steel enterprises.

Description

technical field [0001] The invention relates to a sintering waste heat power generation system driven by a screw expander and its method, especially a method and device for efficiently recovering the waste heat of the main flue gas of the sintering machine and the waste heat of the waste gas of the sinter vertical cooling device at the same time, which belongs to high temperature Particle waste heat recovery equipment and technical field. Background technique [0002] The iron and steel industry is an important basic industry of the country and a pillar industry of the national economy. At present, my country's iron and steel industry is developing rapidly and has made great achievements. However, with the rapid development of my country's iron and steel industry, the problem of high energy consumption is serious, and the situation of energy conservation in the iron and steel industry is extremely severe. [0003] The processes in China's steel industry mainly include cokin...

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Problems solved by technology

[0005] In the process of sintering waste heat utilization, the waste heat is generally used to generate electricity through steam turbines, but steam turbines have high requirements for steam quality, and it is difficult for the steam generated by sintering waste heat to fully meet the requirements, resulting in low power generation efficiency of steam turbines

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