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Method of recovering flue gas waste heat and dust in nonferrous metal smelting

A non-ferrous metal and flue gas waste heat technology, which is applied in waste heat treatment, climate sustainability, lighting and heating equipment, etc., can solve the problems of burning out bag recyclers, unstable process control, bag blockage, etc., and achieve a small thermal expansion coefficient , large elastic modulus and high heat transfer efficiency

Active Publication Date: 2013-12-25
SHANDONG JINSHENG NON FERROUS GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dry dust collection is used more to recover dust, and the process control is unstable, and the bag collector is burned out, or the bag is blocked, and the energy consumption is high.

Method used

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  • Method of recovering flue gas waste heat and dust in nonferrous metal smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A method for recycling waste heat and dust of non-ferrous metal copper smelting flue gas of the present invention

[0064] It includes a waste heat recovery device and a dust recovery device, which are characterized in that the waste heat recovery device and the dust recovery device are composed of a countercurrent heat exchange waste heat boiler A (1), a silicon nitride porous ceramic filter (2), and a countercurrent heat exchange waste heat boiler B ( 3), countercurrent heat exchange waste heat boiler working fluid preheater (4), sheet type channel gas countercurrent heat exchanger (5), bag filter dust collector (6), induced draft fan (7) are connected through pipelines or pipe fittings After being desulfurized in the flue gas desulfurization workshop (8) after recovery of waste heat and dust, the tail gas is discharged up to standard;

[0065] Described recycling method comprises the steps:

[0066] ①. Primary recovery of waste heat

[0067] The 1400°C flue gas fro...

Embodiment 2

[0082] A method for recycling waste heat and dust of non-ferrous metal copper smelting flue gas of the present invention

[0083] According to the method and step of embodiment 1, difference is:

[0084] ①. Flue gas temperature 1350℃

[0085] ②. The waste heat recovery device used in steps ①, ③, and ④ is the countercurrent heat exchange waste heat boiler A (1), the countercurrent heat exchange waste heat boiler B (3) and the countercurrent heat exchange waste heat boiler working medium preheater (4). The heat exchange between the working fluids of the boiler adopts the three-tube countercurrent heat exchange method. The heat exchange device is composed of three straight tubes with different diameters. The gap tubes have opposite flow directions to realize countercurrent heat exchange.

[0086] The recovery rate of heat carried in the flue gas is ≥97%, and the recovery rate of smoke and dust is ≥98%.

Embodiment 3

[0088] A method for recycling waste heat and dust of non-ferrous metal copper smelting flue gas of the present invention

[0089] According to the method and steps of Example 1, the difference is: the heat exchange between the flue gas of the countercurrent heat exchange waste heat boiler A (1) and the boiler waste heat recovery working fluid adopts a double-pipe countercurrent heat exchange method;

[0090] ①. Flue gas temperature 1400℃

[0091] ②. The heat exchange between the flue gas of the countercurrent heat exchange waste heat boiler B (3) and the working medium preheater (4) of the countercurrent heat exchange waste heat boiler and the working medium of the boiler adopts the three-tube countercurrent heat exchange method.

[0092] The recovery rate of heat carried in the flue gas is ≥96%, and the recovery rate of smoke and dust is ≥98%.

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Abstract

The invention relates to a method of recovering flue gas waste heat and dust in nonferrous metal smelting and belongs to a method of waste heat utilization and waste gas treatment. A waste heat recovery device and a dust recovery device are formed by connecting a counter flow heat exchange waste heat boiler A, a silicon nitride porous ceramic filter, a counter flow heat exchange waste heat boiler B, a counter flow heat exchange waste heat boiler medium preheater, a plate type passage gas counter flow heat exchanger, a bag filter, and a draught fan through a pipeline or pipes; flue gas subjected to waste heat and dust recovery is subjected to sulfur recovery in a desulfurization shop, and the tail gas can be discharged standardly. The method includes the steps of primary waste heat recovery, filtration, dedusting and purification of high temperature flue gas, secondary waste heat recovery, tertiary waste heat recovery, quaternary waste heat recovery, low temperature filtration and dedusting, sulfur recovery, and emission of tail gas under national standard. The method has the advantages that waste heat recovery is efficient, dust recovery is complete, process control is simple, and recovery cost is low.

Description

technical field [0001] The invention relates to a recycling method for waste heat and dust of nonferrous metal smelting flue gas. It belongs to the method of waste heat utilization and waste gas treatment. Background technique [0002] The non-ferrous metal smelting process consumes a lot of heat energy, which comes from coal, oil, oilfield gas or electricity. During the smelting process of non-ferrous metals, the flue gas emitted is as high as 1000 ° C, and the heat taken away accounts for more than half of the total energy consumption of metal smelting. Among them, the waste heat of the flue gas with a temperature higher than 1000°C accounts for 52% of the total waste heat of the flue gas, the waste heat of the medium and high temperature between 600 and 1000°C accounts for 26% of the total waste heat of the flue gas, and the waste heat of the low temperature below 600°C accounts for 52% of the total waste heat of the flue gas. 22% of the waste heat of the gas. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00
CPCF27D17/008F27D2017/006Y02P80/15
Inventor 吕庆淮陈春光王京连王春雨吕瑞新卢晓东韦子木吕瑞达郑晓光
Owner SHANDONG JINSHENG NON FERROUS GRP
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