Method and device for dry-type medium- and high-temperature grading electrofiltration dust removal of carbon thermal reduction furnace flue gas

A reduction furnace, medium and high temperature technology, applied in the field of high temperature graded electric filter dust removal, to achieve the effect of preventing condensation and high dust removal efficiency

Active Publication Date: 2020-04-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems, the present invention proposes a method for dry-type medium-high temperature graded electric filtration and dedusting of carbon thermal reduction furnace flue gas, in order to achieve the purpose of graded and efficient removal of fine particles in high-temperature industrial waste gas in carbon thermal reduction furnace flue gas; The method not only has high dust removal efficiency, but also does not need to consume water when treating yellow phosphorus flue gas, and will not produce sludge phosphorus, which fundamentally solves the shortcomings of yellow phosphorus flue gas wet dust removal

Method used

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  • Method and device for dry-type medium- and high-temperature grading electrofiltration dust removal of carbon thermal reduction furnace flue gas
  • Method and device for dry-type medium- and high-temperature grading electrofiltration dust removal of carbon thermal reduction furnace flue gas

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Embodiment 1

[0029] Embodiment 1: as figure 1 , 2 As shown, the device used in this embodiment includes 3 dust removal units, a blower 5, an insulating support 12, and a high-voltage power supply 13, wherein the dust removal unit includes an insulating shell 3, an air outlet channel 6, an insulating fixing bracket 7, a high-temperature electric heating electric filter Coupling assembly 9, cathode electrode 11, nozzle 10, insulating fixing bracket 7 are fixed below the fixing plate 4 on the top of the insulating shell 3, six high-temperature electric heating and electric filter coupling assemblies 9 are fixed under the insulating fixing bracket 7, and three cathode electrodes 11 Fixed on the insulating fixing bracket 7 and located around the high-temperature electric heating electric filter coupling assembly, two nozzles 10 are fixed under the fixing plate 4 and above the high-temperature electric heating electric filter coupling assembly 9, between the fixing plate 4 and the insulating fix...

Embodiment 2

[0031] Embodiment 2: The structure of the device used in this embodiment is the same as in Embodiment 1;

[0032] Pass the high-dust yellow phosphorus vapor at 150°C into the insulating shell 3 through the air inlet 2, in which the gas flow velocity is 15m / s, and the particle concentration is 60mg / m 3 , the oxygen content is lower than 4%; the cathode electrode 11 in the charging area adopts a conical grid electrode, the electrode material is silicon carbide, and the anode electrode is a high-temperature electric heating electric filter coupling assembly 9, which is made of aluminum alloy as a hollow cylinder , and then the cylinder is drilled with a laser to form micropores with a pore size of 60 μm; and the cathode and anode are connected to a 100kv AC high-voltage power supply 13, and the heating temperature of the high-temperature electric heating and electric filter coupling assembly 9 is 400°C; the gas Enter the charging area from the air inlet 2, and charge the particle...

Embodiment 3

[0034] Embodiment 3: The structure of the device used in this embodiment is the same as in Embodiment 1;

[0035] The 500°C copper smelting acid production flue gas is passed into the insulating shell 3 through the air inlet 2, where the flue gas flow rate is 10m / s, and the concentration of particulate matter in the flue gas is 200 mg / cm 3 , the flue gas also contains some gaseous heavy metal substances, such as As, etc., and the oxygen content is less than 2%; the cathode electrode 11 in the charging area adopts a double-area half-bone spur electrode, the electrode material is stainless steel, and the anode electrode is a high-temperature electric heating electric filter coupling component 9. It adopts silicon carbide material, which is a hollow cylindrical cage with micropores welded vertically and horizontally by longitudinal ribs and support rings, with a pore diameter of 20 μm; and the cathode and anode are connected to an 80kv DC high-voltage power supply 13. Corona disc...

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Abstract

The invention discloses a method and device for dry-type medium- and high-temperature grading electrofiltration dust removal of carbon thermal reduction furnace flue gas. According to the method and device, the carbon thermal reduction furnace flue gas is introduced into a charging region under a sealed condition with oxygen content lower than 5 percent; a negative electrode is arranged in the charge region, and a high-temperature electric heating and electric filtering coupling assembly is used as a positive electrode and is adopted as a dust collecting electrode at the same time; under the action of direct current, alternating current or pulse high-voltage voltage, the charging region charges particulate matters in the flue gas; the charged particulate matters can be effectively removedunder the action of electric field force and micropore physical resistance; the high-temperature electric heating and electric filtering coupling assembly can generate high temperature under the action of current to heat the flue gas, so that the condensation of the carbon thermal reduction furnace flue gas is prevented, and the phenomenon that a pipeline is blocked due to the condensation of partof the carbon thermal reduction furnace flue gas such as yellow phosphorus flue gas is effectively avoided. With the method and device of the invention adopted, the high-efficiency removal efficiencyof the particulate matters in the medium-high temperature carbon thermal reduction furnace industrial waste gas is improved to a great extent.

Description

technical field [0001] The invention relates to the field of dust removal equipment, in particular to a method and device for dry-type medium-high temperature graded electric filter dust removal of flue gas from a carbothermal reduction furnace. Background technique [0002] The non-ferrous metal industry is a mineral processing industry, with large logistics volume and long process flow, and is one of the main industries that pollute the environment. Especially because the metal minerals in our country are low in grade, complex in structure, and often coexist with toxic metal and non-metallic elements, so a large amount of harmful waste residue (stone), waste water and waste gas are produced in each process of mining, dressing, smelting and processing, resulting in Serious environmental pollution. The production of non-ferrous metal industry may emit more than 300 million tons of greenhouse gases (equivalent to CO2) per year. 2 ), also emit a large amount of other harmful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C3/017B01D50/00
CPCB03C3/017B01D50/00
Inventor 瞿广飞李志顺成宁平杨聪庆
Owner KUNMING UNIV OF SCI & TECH
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