A combined optimization system for high temperature flue gas and heat

Abstract

The invention discloses a high-temperature flue gas heat joint optimization system and relates to the technical field of industrial waste heat utilization. The high-temperature flue gas heat joint optimization system is designed to solve the problems that an existing flue gas waste heat recovery system is low in waste heat utilization rate, serious in pollution, high in production cost and the like. The high-temperature flue gas heat joint optimization system comprises a first production device and a second production device. The first production device comprises a process material pump, a heat exchanger unit and a heating furnace which are connected through pipelines. The second production device comprises a waste heat boiler and a steam pocket which are connected through a pipeline, wherein the waste heat boiler is provided with a superheat section, an evaporation section and a coal economizing section. High-temperature flue gas passes through the superheat section, the evaporation section and the coal economizing section, connected in sequence, of the waste heat boiler and the steam pocket, conducts heat exchange with a first process material, saturated steam and deoxidized water, and enters a chimney to be exhausted. Heat of the flue gas is used for heating the first process material, the temperature of the first process material entering the heating furnace is increased, and thus the waste heat utilization rate of the high-temperature flue gas is increased, the consumption of fuel gas of the heating furnace is reduced, energy is saved, environmental friendliness is achieved, and production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of industrial waste heat utilization, in particular to a high-temperature flue gas heat combined optimization system. Background technique [0002] At present, the first production device A includes a process material pump 1, a heat exchanger group 2 and a heating furnace 3 (such as figure 1 As shown), the process material 1 can be pressurized by the process material pump 1, exchange heat with the process material 2 through the heat exchanger group 2, and then enter the heating furnace 3 to be heated to complete the production process. During the production process, the heating furnace is cooled A large amount of fuel gas is consumed. [0003] Such as figure 2 As shown, the second production device B includes a waste heat boiler 4, and the high-temperature flue gas enters the waste heat boiler 4, and then passes through the heating section 5, the evaporation section 6, and the coal-saving section 7 to per...

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Problems solved by technology

[0004] The above-mentioned first production device A and second production device B only consider heat consumption from their own devices, but do not consider the joint energy consumption of heat between the two production devices, the utilization rate of high-temperature flue gas waste heat is low, and the production cost is high

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