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A high-temperature flue gas waste heat recovery and deep purification system

A waste heat recovery, high temperature flue gas technology, applied in waste heat treatment, improving energy efficiency, lighting and heating equipment, etc., can solve the problem of low utilization rate of waste heat, and achieve the effect of improving utilization rate, extending circulation path, and efficiently recovering waste heat

Active Publication Date: 2019-01-25
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method that can fully and effectively utilize the heat of the high-temperature flue gas to generate electricity and process the low-temperature flue gas after recovering heat, aiming at the defect of low waste heat utilization rate in the existing aluminum electrolysis high-temperature flue gas. The deep purification device achieves the purpose of energy saving, emission reduction and production cost reduction

Method used

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  • A high-temperature flue gas waste heat recovery and deep purification system

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Embodiment

[0025] see figure 1 , a high-temperature flue gas waste heat recovery and deep purification system in the diagram is the preferred solution of the present invention, which consists of a waste heat recovery module 72, a gas collection box 77, a power generation module 78, an organic Rankine cycle heat exchanger 79, Condenser 712, working medium separator 713, liquid storage tank 714, dust removal and purification module 716 and other parts. The inlet end of the waste heat recovery module 72 is connected to the high-temperature flue gas inlet 71, the gas outlet end of the waste heat recovery module 72 is connected to the dust removal and purification module 716, and the heat exchange medium pipe outlet 76 of the waste heat recovery module 72 is connected to the gas collection Box 77, the gas collection box 77 is connected to the power generation module 78 through the regulating valve 717, the gas outlet of the power generation module 78 is connected to the inlet of the organic R...

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Abstract

The invention discloses a high-temperature flue gas waste heat recovery and advanced purification system. The system comprises a waste heat recovery module, a power generation module, an organic Rankine cycle heat exchanger and a dust removal purification module, wherein the gas inlet end of the waste heat recovery module is connected with a high-temperature flue gas inlet, the gas outlet end of the waste heat recovery module is connected with the dust removal purification module, two sets of tube type heat exchangers in different arrangement directions are arranged in the waste heat recovery module, a heat-exchange medium pipe outlet inside the waste heat recovery module is connected with the power generation module, the power generation module and the organic Rankine cycle heat exchanger are connected in series, and steam output through the organic Rankine cycle heat exchanger is subjected to refluxing through a condenser, passes through a working medium separator and then is connected to the waste heat recovery module and a heat exchange medium pipe inlet of the organic Rankine cycle heat exchanger. According to the high-temperature flue gas waste heat recovery and advanced purification system, a water working medium and an organic working medium are adopted and combined with electrolyzed high-temperature flue gas for three-time heat exchange, the purpose of utilizing heat of high-temperature flue gas to the maximum extent is achieved, the dust removal purification module is adopted for conducting advanced purification on cooled flue gas, energy conservation and emission reduction are achieved, and the economic benefit of enterprise production is improved.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization and purification of aluminum electrolysis flue gas, and specifically relates to a high-temperature flue gas waste heat recovery and deep purification system. Background technique [0002] During the aluminum electrolysis production process, only 40% to 45% of the input electric energy is used to participate in the electrolytic reaction to form aluminum, and the heat taken away by the flue gas accounts for 10% of the heat loss of the entire tank system (total energy minus the electric energy of the electrochemical reaction) 40% to 60%. Therefore, recycling the energy taken away by the flue gas is of great significance to reduce the energy consumption per ton of aluminum in aluminum electrolysis enterprises and improve the economic benefits of enterprises. [0003] At present, in the production process of electrolytic aluminum, the electrolytic cell continuously produces anode gas, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00F22B1/18F01K25/00
CPCF01K25/00F22B1/18F27D17/004F27D17/008F27D2017/006Y02P10/25
Inventor 张红亮李劼龚阳孙珂娜冉岭丁凤其邹忠
Owner CENT SOUTH UNIV
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