Flue gas purification method and device of electrolytic aluminum smelting furnace and heat preserving furnace

A technology for flue gas purification and smelting furnaces, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles. It can solve the problems of enlarged fan equipment, increased equipment cost, and high cost of use, and achieves reduced production and operation costs. Automation High degree of control and thorough purification effect

Inactive Publication Date: 2010-08-18
WEIHAI ZHENGDA ENVIRONMENTAL PROTECTION EQUIP LTD BY SHARE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because air-cooled cooling requires high-power fans, mixing a large amount of cold air to cool down requires larger fan equipment, and the above methods all increase the cost of equipment, high cost of use, and waste of energy

Method used

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  • Flue gas purification method and device of electrolytic aluminum smelting furnace and heat preserving furnace
  • Flue gas purification method and device of electrolytic aluminum smelting furnace and heat preserving furnace
  • Flue gas purification method and device of electrolytic aluminum smelting furnace and heat preserving furnace

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Embodiment Construction

[0017] Such as figure 1 As shown, a method for purifying flue gas from an electrolytic aluminum smelting furnace and a holding furnace, under normal circumstances, due to the suction of the induced draft fan 8, the flue gas from the smelting furnace and the holding furnace enters through the flue valve 5 and the flue gas pipe 1 The cooling tower 2 is used for cooling, the flue gas enters the tower from the top of the cooling tower, the temperature sensors at the inlet and outlet of the cooling tower measure the temperature, and the flow of water out of the high-pressure nozzle on the spray valve is controlled by PLC, the compressed air enters the high-pressure nozzle, and the cooling The water droplets at the outlet of the bottom of the tower are all vaporized and evaporated, the flue gas is dried after cooling down, and the cooled flue gas enters the bag filter 4 for separation and purification, and the purified flue gas is emptied by the chimney 9 through the induced draft fa...

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Abstract

The invention relates to flue gas purification method and device of an electrolytic aluminum smelting furnace and a heat preserving furnace. The flue gas purification method is characterized by comprising the following steps of: utilizing the suction force of a draught fan to cause flue gas generated in the electrolytic aluminum smelting furnace and the heat preserving furnace to enter a cooling tower for cooling and then enter a cloth bag type dust remover for filtering, and evacuating the filtered flue gas through a chimney. The invention has the advantages of simple process, thorough primary purification on smoke, no pollution generation, advanced technique, high degree of automatic control, economic benefit and reasonability and effectively reduces the production running cost, the dust removing efficiency reaches over 99%, the dust content in the discharged flue gas is 10 mg/Nm<3> which is superior to the national discharge standard.

Description

technical field [0001] The invention relates to the purification of dust and flue gas emissions, in particular to a method and device for purifying the flue gas of an electrolytic aluminum smelting furnace and a holding furnace. Background technique [0002] Electrolytic aluminum smelting furnaces and holding furnaces produce a large amount of high-temperature flue gas containing dust during the smelting process, and direct discharge will cause serious pollution to the environment. Therefore, it is necessary to carry out dust purification treatment on high-temperature flue gas to avoid polluting the environment. The temperature of the flue gas produced by the electrolytic aluminum smelting furnace and the holding furnace reaches 850 0 C. At present, the temperature withstood by the high-temperature dust-removing bag at home and abroad is ≤300 0 C. Now it is usually air-cooled or mixed with a large amount of cold air for cooling treatment, and then enters the bag filter. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/02C25C3/22
Inventor 苏桂树
Owner WEIHAI ZHENGDA ENVIRONMENTAL PROTECTION EQUIP LTD BY SHARE LTD
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