Arsenic collecting system for dioxin-containing smelting flue gas and method thereof

A technology for smelting flue gas and flue gas, which is applied in separation methods, chemical instruments and methods, gas treatment, etc. It can solve the problems of low recovery rate of non-ferrous metals and failure to remove dioxins, etc., and achieve improved removal effect and resource utilization The effect of better efficiency and lower acid dew point

Inactive Publication Date: 2021-12-03
CHINA ENFI ENGINEERING CORPORATION
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a system and method for collecting arsenic from dioxin-containing smelting flue gas, so as to solve the problems of no dioxin removal and low recovery rate of non-ferrous metals in the existing flue gas arsenic collection process

Method used

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  • Arsenic collecting system for dioxin-containing smelting flue gas and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] use figure 1 The middle system collects arsenic. The arsenic collection steps are as follows:

[0051] Bottom-blown converter smelting flue gas in recycled copper blowing section, initial flue gas volume is 45000Nm 3 / h, the flue gas contains arsenic trioxide (volume fraction 0.53%), sulfur trioxide (volume fraction 0.1%) and dioxin-like pollutants (≈5ngTEQ / Nm 3 ), the concentration of copper, lead and zinc and other non-ferrous metal dust is about 3270mg / Nm 3 .

[0052] After passing through the waste heat boiler, the high-temperature flue gas at 450°C enters the filter dust collector (including 800 high-temperature resistant metal filter cartridges set in parallel, and the filter area of ​​the dust collector is 2000m2) 2 ), and return the non-ferrous metal dust to the converter for smelting. Among them, the filter dust collector is a bag filter formed by a stainless steel particle sintered filter cartridge provided by Chengdu Yitai Technology Co., Ltd. The backfl...

Embodiment 2

[0058] Side-blown converter smelting flue gas in the secondary copper blowing section, the initial flue gas volume is 40,000Nm 3 / h, the flue gas contains arsenic trioxide (volume fraction 0.27%), sulfur trioxide (volume fraction 0.16%) and dioxin pollutants (≈3ngTEQ / Nm 3 ), the concentration of copper, lead and zinc and other non-ferrous metal dust is about 1820mg / Nm 3 ,' After passing through the waste heat boiler, the high-temperature flue gas at 430 °C enters the filter dust collector (including 1200 high-temperature resistant ceramic filter cartridges set in parallel, and the filter area of ​​the dust collector is 1500m 2 ), and return the copper-containing dust to the converter for smelting. Among them, the filter dust collector is a bag filter formed by a ceramic fiber filter cartridge provided by Shandong Industrial Ceramics Research and Design Institute Co., Ltd. The backflush pressure is 0.6Mpa, and the flow rate of the smelting flue gas in the filter dust collector...

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Abstract

The invention provides an arsenic collecting system for dioxin-containing smelting flue gas and a method thereof. The system comprises a first dust collection unit, a quenching deacidification unit, a sedimentation unit and a second dust collection unit. Through layer-by-layer cooperative utilization of the systems, the yield of arsenic trioxide is 95-98%, the yield of non-ferrous metal dust is greater than 98%, and the content of dioxin substances in finally discharged flue gas is below 0.5 ngTEQ / Nm<3>.

Description

technical field [0001] The invention relates to the field of nonferrous metal smelting, in particular to an arsenic collection system and method for smelting flue gas containing dioxin. Background technique [0002] As the country pays more and more attention to the secondary metal industry, secondary resources of non-ferrous metals such as copper-containing sludge, lead-containing leaching slag, and zinc-containing steel plant smoke and dust have been reused, and the smelting scale has expanded year by year. The composition of the smelting flue gas is complex, and the arsenic-containing raw materials enter the flue gas in the gaseous form of arsenic trioxide. At the same time, the flue gas also contains recyclable non-ferrous metal dust, dioxin, sulfur trioxide and other harmful substances. In recent years, according to the relevant standards of the national "Recycled Copper, Aluminum, Lead and Zinc Industrial Pollutant Discharge Standard" and "Hazardous Waste Incineration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02B01D46/24B01D53/79B01D53/50B01D53/46B01D53/10
CPCB01D46/023B01D46/2411B01D53/79B01D53/50B01D53/46B01D53/10B01D2253/102B01D2257/2064B01D2257/302B01D2258/0283
Inventor 魏徵李谦袁胜利程虎
Owner CHINA ENFI ENGINEERING CORPORATION
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