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Copper smelting plant smoke waste heat recycling system and application method

A flue gas waste heat and recovery system technology is applied in the field of waste heat utilization to achieve the effect of saving energy consumption and improving energy utilization efficiency

Inactive Publication Date: 2018-02-23
北京和然益华节能科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a copper smelter flue gas waste heat recovery system and the use method of the system, to solve the problem of recovering the flue gas waste heat while reducing the sulfur trioxide flue gas on the acid production line of the copper plant before entering the second absorption tower cool down

Method used

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  • Copper smelting plant smoke waste heat recycling system and application method

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: as figure 1 As shown, a flue gas waste heat recovery system in a copper smelter includes a closed-loop air channel 1, and an air inlet 2, an induced draft fan 3, a flue gas heat exchanger 4, and a No. 1 gas outlet 5 are arranged in sequence on the closed-loop air channel 1 , No. 1 air flow regulating valve 6, air-water heat exchanger 7, No. 2 air outlet 8 and No. 2 air flow regulating valve 9, an air inlet regulating valve 10 is provided on the air inlet 2, and an air inlet regulating valve 10 is arranged on the No. 1 air outlet 5 There is a No. 1 gas outlet regulating valve 11, and a No. 2 gas outlet regulating valve 12 is provided at the No. 2 gas outlet 8. The absorption side of the flue gas heat exchanger 4 is connected in series on the closed-loop air channel 1, and the heat supply side of the flue gas heat exchanger 4 is set. There is a flue gas inlet 13 and a flue gas outlet 14. The heat supply side of the air-water heat exchanger 7 is connected in ...

Embodiment 2

[0020] Embodiment 2: as figure 1 As shown, a method for recovering waste heat using the copper smelter flue gas waste heat recovery system described in Example 1, it includes the following three operating methods:

[0021] 1) In the case of not recovering waste heat, close the No. 1 air flow regulating valve 6 and No. 2 air flow regulating valve 9, the air passes through the intake regulating valve 10, pressurized by the induced draft fan 3, enters the flue gas heat exchanger 4 and is heated After passing through the No. 1 air outlet regulating valve 11, it is discharged from the No. 1 gas outlet 5;

[0022] 2) In the case of recovering part of the waste heat, the temperature feedback of the temperature detection device 17 is used to control and adjust the opening of the No. 1 outlet air regulating valve 11, open the No. 1 air flow regulating valve 6, close the No. 2 air flow regulating valve 9, and open the No. 2 air flow regulating valve 9. No. 1 air outlet control valve 12...

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Abstract

The invention discloses a copper smelting plant smoke waste heat recycling system. The copper smelting plant smoke waste heat recycling system comprises a closed-loop air flue. The closed-loop air flue is sequentially provided with an air inlet, an induced draft fan, a smoke heat exchanger, a first air outlet, a first air flow adjusting valve, a gas-water heat exchanger, a second air outlet and asecond air flow adjusting valve. The air inlet is provided with an air inlet adjusting valve. The first air outlet is provided with a first air outlet adjusting valve, and the second air outlet is provided with a second air outlet adjusting valve. The absorbing side of the smoke heat exchanger is connected to the closed-loop air flue in series. The heat supply side of the smoke heat exchanger is provided with a smoke inlet and a smoke outlet, the heat supply side of the gas-water heat exchanger is connected to the closed-loop air flue in series, and the absorbing side of the gas-water heat exchanger is provided with a water inlet and a water outlet. The copper smelting plant smoke waste heat recycling system can recycle smoke waste heat and can also cool sulfur trioxide smoke on a copper plant acid making production line before the sulfur trioxide smoke enters a second absorption tower.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization, in particular to a copper smelter flue gas waste heat recovery system and a use method. Background technique [0002] In the process of making acid from flue gas in copper smelters, it is necessary to convert sulfur dioxide into sulfur trioxide. The conversion temperature is between 400°C and 600°C. The temperature of the raw gas rises to about 420°C and enters the catalyst bed of the conversion second stage for reaction. After cooling down, it enters the conversion process. The three-stage catalyst bed reacts, and after the reaction, the sulfur trioxide needs to be cooled to about 170°C and enters the first absorption tower. The unabsorbed gas enters the catalyst bed of the fourth conversion stage after the residual temperature of the second and third conversion stages rises to about 420°C for the second conversion, and the gas temperature at the outlet of the fourth stage drops t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F27D19/00
CPCF27D17/004F27D19/00F27D2019/0043F27D2019/0003Y02P10/25
Inventor 刘英博张俊月
Owner 北京和然益华节能科技有限责任公司