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Flue gas waste heat recovery system and recovery method for aluminum melting furnace

A flue gas waste heat and recovery system technology, applied in the direction of furnace, preheating cost, waste heat treatment, etc., can solve the problems of large heat loss of flue gas, low energy utilization rate, etc., and achieve high heat exchange efficiency, simple structure and low operating cost low effect

Inactive Publication Date: 2022-04-12
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to the poor equipment and no measures such as sealing and heat preservation of the flue gas, the heat loss of the unused flue gas is very large, and the energy utilization rate is very low

Method used

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  • Flue gas waste heat recovery system and recovery method for aluminum melting furnace
  • Flue gas waste heat recovery system and recovery method for aluminum melting furnace

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Embodiment Construction

[0018] The specific technical solutions of the present invention are described in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, a flue gas waste heat recovery system of an aluminum melting furnace, a nitrogen heater 2, a flue gas-air heat exchanger 3, and an aluminum ingot heating chamber 4 are sequentially installed on the flue gas discharge pipeline of an aluminum melting furnace 1; the flue gas is sequentially installed Heating the nitrogen in the nitrogen tank, the cold air in the flue gas-air heat exchanger 3, and the aluminum ingot in the aluminum ingot heating chamber 4;

[0020] The heated cold air in the flue gas-air heat exchanger 3 is used as hot air, which is connected to the aluminum melting furnace 1 through pipelines.

[0021] Such as figure 2 As shown, the aluminum ingot heating chamber 4 adopts a tunnel structure, high-temperature flue gas is blown in from the bottom nozzle 42 at the outlet, and is discharged from the rear ...

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Abstract

The invention provides a flue gas waste heat recovery system and method for an aluminum melting furnace. A nitrogen heater, a flue gas-air heat exchanger and an aluminum ingot heating chamber are sequentially installed on a flue gas discharge pipeline of the aluminum melting furnace. The flue gas sequentially heats nitrogen in the nitrogen tank, cold air in the flue gas-air heat exchanger and aluminum ingots in the aluminum ingot heating chamber; and the cold air in the flue gas-air heat exchanger is heated to serve as hot air and is connected to the aluminum melting furnace through a pipeline. The heat exchange efficiency of the heat exchanger and the dew point corrosion resistance of equipment are improved, the service life of the heat exchanger is prolonged, low-temperature flue gas waste heat can be efficiently recycled, and the obvious energy-saving and emission-reducing effects are achieved.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery, in particular to a waste heat recovery system and recovery method for flue gas from an aluminum melting furnace. Background technique [0002] The recovery of waste heat resources is conducive to improving energy utilization efficiency of energy-consuming equipment and reducing the emission of harmful substances, which not only saves energy but also protects the environment. [0003] According to statistics, the total domestic industrial waste heat resources account for about 17% to 67% of the total fuel consumption. In the smelting industry, medium and low-temperature flue gas waste heat accounts for about half of the flue gas waste heat resources, and most of them can be recycled as long as suitable recovery devices are used. Medium and low-temperature flue gas does not have high requirements on the material of the heat exchanger, so it is more suitable to use the air heat exchange...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F27D13/00
CPCY02P10/25
Inventor 涂福炳张翼飞张祖恒刘涵
Owner CENT SOUTH UNIV
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