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A method and circulation system for improving the operating rate of flash furnace waste heat boiler

A waste heat boiler and circulation system technology, applied in the direction of improving energy efficiency, process efficiency, furnace, etc., can solve the problems of heavy maintenance work, high maintenance frequency of flash furnace waste heat boiler, etc., and achieve the effect of improving operation rate

Active Publication Date: 2018-09-25
TIANJIN FLASH IRONMAKING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a method for improving the operating rate of flash furnace waste heat boilers, so as to solve the problems of high maintenance frequency and large maintenance workload of flash furnace waste heat boilers

Method used

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  • A method and circulation system for improving the operating rate of flash furnace waste heat boiler
  • A method and circulation system for improving the operating rate of flash furnace waste heat boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The temperature of the copper flash smelting furnace is 1330 ℃ in the flue gas (the dust content is 171.5g / Nm 3 ) through the confluence three-way valve 8 and the cold flue gas (temperature 320°C, dust content 0.3g / Nm 3 ) after mixing, the flue gas temperature drops to 920°C and the dust content is 122.06g / Nm 3 , after the high-temperature dust collector 2, the dust content of the flue gas is reduced to 23.19g / Nm 3 , the flue gas is reintroduced into the waste heat boiler 3 to absorb its sensible heat, and the temperature is reduced to 360°C, and then introduced into three dust chambers and electrostatic precipitators in sequence, and the dust content of the flue gas at the outlet of the electrostatic precipitator is reduced to 0.3g / Nm 3 ; The flue gas that will remove most of the dust is introduced into the exhaust fan 5, and then the exhaust fan 5 is imported into the flow control device 6 for shunting; then the 40.6% (volume fraction) flue gas that is shunted throug...

Embodiment 2

[0045] The flue gas (dust content of 192.6g / Nm 3 ) through confluent three-way valve 8 and cold flue gas (temperature 150°C, dust content 0.35g / Nm 3 ) after mixing, the flue gas temperature drops to 900°C and the dust content is 110.2g / Nm 3 , after the high-temperature dust collector 2, the dust content of the flue gas is reduced to 19.84g / Nm 3 , the flue gas is reintroduced into the waste heat boiler 3 to absorb its sensible heat, and the temperature drops to 180°C, and then introduced into two dust chambers and electrostatic precipitators in turn, and the dust content of the flue gas at the outlet of the electrostatic precipitator is reduced to 0.35g / Nm 3 ; The flue gas that will remove most of the dust is introduced into the exhaust fan 5, and the exhaust fan 5 is imported into the flow control device 6 for shunting; then the 75% (volume fraction) flue gas that is shunted through the flow control device 6 is introduced into the compressor 7 for boosting Finally, return to...

Embodiment 3

[0049] Such as figure 1 As shown, a circulation system for improving the operation rate of flash furnace waste heat boiler, including flash furnace 1, confluence three-way valve 8, high temperature dust collector 2, waste heat boiler 3, dust removal assembly 4, and exhaust fan connected in sequence through the tail gas pipeline 5. Flow control equipment 6 and compressor 7; the confluence three-way valve 8 is provided with inlet I, inlet II and outlet III, the inlet I is connected to the flue gas outlet of the flash furnace 1 through a pipeline, and the Inlet II is connected to the flue gas outlet of the compressor 7 through a pipeline; the outlet III is connected to the flue gas inlet of the high-temperature dust collector 2 through a pipeline; the flow control device 6 is provided with an air inlet and two Gas outlet, the air inlet communicates with the smoke outlet of the exhaust fan 5 through a pipe, and one of the gas outlets communicates with the smoke inlet of the compre...

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Abstract

The invention provides a method for increasing the operation rate of a flash furnace waste heat boiler. The method includes the following steps that (1) high-temperature smoke discharged from a flash furnace is mixed with cold smoke through a combination three-way valve and then led into the waste heat boiler through a high-temperature deduster; (2) smoke coming out of the waste heat boiler is led into a dedusting assembly; (3) smoke subjected to dedusting through the dedusting assembly is led into an exhaust fan and then guided into a flow control device through the exhaust fan so as to be distributed; (4) part of the smoke distributed through the flow control device is led into a compressor to be pressurized; (5) the pressurized smoke returns to the smoke discharging end of the flash furnace and then is mixed with high-temperature smoke through the combination three-way valve; (6) the mixed gas is led into the high-temperature deduster to be subjected to dust removal; and (7) the smoke subjected to dust removal through the high-temperature deduster is led into the waste heat boiler so as to be subjected to cooling and dust removal. By means of the method for increasing the operation rate of the flash furnace waste heat boiler, the failure rate of the flash smelting furnace waste heat boiler can be greatly lowered, and the maintenance frequency is lowered.

Description

technical field [0001] The invention belongs to the technical field of flash furnace waste heat boilers, and in particular relates to a method and a circulation system for improving the operation rate of flash furnace waste heat boilers. Background technique [0002] The flash furnace waste heat boiler is an important thermal equipment in the flash smelting process and plays an irreplaceable role in the process flow of the smelting workshop. Cool down and preliminary dust removal. The flash furnace waste heat boiler is usually directly connected with the flash furnace's ascending flue. The flash furnace flue gas enters the waste heat boiler through the ascending flue outlet, and the temperature of the waste heat boiler drops below 400°C, and then enters the dust removal device for dust removal. [0003] The flue gas temperature at the outlet of the flash furnace is as high as 1200-1500 ° C, and a large amount of molten smoke is entrained, and the smoke rate is 6% to 10%. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00
CPCF27D17/004F27D17/008F27D2017/006Y02P10/25
Inventor 黄小兵邱江波夏明
Owner TIANJIN FLASH IRONMAKING TECH CO LTD
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