Low-temperature residual heat power generating system for steel smelting sintering ring-cooling machine

Abstract

This invention involves a pure low temperature afterheat generating system, particularly the necessary steel mill burns the kink cold machine use the pure low temperature afterheat generating system. The steel-making burns in kink Leng Ji the low temperature afterheat generating system, burns the kink cold machine steam turbine, the generator, the first-level economizer, the second-level economizer, the evaporator, the first-level superheater including the steel-making, its characteristic lies in burns the kink coldly machine place above from to enter the material mouth along the red ore transportation direction high temperature, warm, on the low temperature three heat sources to arrange the first-level superheater, the evaporator + first-level economizer, the second-level economizer in turn, after first-level superheater the establishment has makes up burns the type second-level superheater, the merit lies in the structure to be simple, fully from the coal gas which produces and burns the kink cold machine waste gas afterheat using the steel mill maximum limit to transform into the electrical energy, afterheat power capacity and the existing fever kink is coldMachine the pure low temperature saturated steam afterheat power technology compares enhances above 50%, and improved the emissions to the environment the influence.

Description

technical field [0001] The invention relates to a pure medium and low temperature waste heat power generation system, in particular to a pure medium and low temperature waste heat power generation system used in supporting sintering ring coolers in steelmaking plants. Background technique [0002] The existing relatively mature sintered ring cooler pure medium and low temperature waste heat power generation system has the following characteristics: [0003] 1. Use water pipes or finned tubes as heat exchange elements for waste heat boilers; [0004] 2. Production of saturated steam or steam with low superheat; [0005] 3. Saturated steam is used for power generation, which has high steam consumption and low power output. [0006] The above three problems lead to the existing pure medium and low temperature waste heat power generation system of sintered ring cooler: first, the heat exchange efficiency of the heat exchange element is not high; second, the waste heat can only...

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Problems solved by technology

[0005] 3. Saturated steam is used for power generation, with high steam consumption and low power generation output

[0006] The above three problems lead to the existing pure medium and low temperature waste heat power generation system of sintered ring cooler: first, the heat exchange efficiency of the heat exchange element is not high; second, the waste heat can only produce low-pressure and low-temperature steam; third, the thermodynamic cycle system can only Using low pressure and low temperature parameters

The above three factors make the power generation capacity of exhaust gas waste heat fail to be fully utilized, that is, the power generation capacity of waste heat cannot reach the proper level

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