Dust removal device for cooling smelting furnace flue gas by utilizing wastewater

Abstract

The invention discloses a dust removal device for cooling smelting furnace flue gas by using wastewater. The device comprises a wastewater sedimentation tank, a filter tank, a flue gas washing tank, awater mist smoke washing box and a water-gas separation box, the wastewater sedimentation tank is provided with a first overflow pipe, a wastewater inlet pipe, a first blow-off pipe and a water pumping pipe, and the water pumping pipe is connected to a water pump, a three-way valve, a spray header and a reflux pump; the filter tank is provided with a filter plate frame and a filter water pipe; the flue gas washing tank is provided with a conical plate, a muddy water pipe, a mud scraping mechanism, a second blow-off pipe, a second overflow pipe, a stirring paddle and a flue gas inlet pipe; thewater mist smoke washing box is provided with a high-pressure gas spray pipe, a third overflow pipe, a third blow-off pipe, a water supplementing pipe and an inclined pipe; and the water-gas separation box comprises a snake-shaped condensation pipe, a V-shaped water tank, a chimney outlet and an unpowered hood. According to the invention, wastewater is directly applied to water film dust removaltreatment after being preliminarily precipitated, dust removal methods such as spraying dust removal, water film dust removal and flushing type water bath dust removal are integrated, the consumptionof washing water is greatly reduced, treatment of the wastewater and waste gas is simplified, and the device has popularization value.

Description

technical field [0001] The invention relates to the technical field of flue gas dust removal, in particular to a dust removal device for cooling the flue gas of a smelting furnace by using waste water. Background technique [0002] The "three wastes" of metal smelting furnaces pose a huge threat to the environment. Solid waste residues are generally treated by relatively fixed methods such as back burial, fine metallurgy, construction materials, and agricultural utilization. In contrast, the treatment of waste water and waste gas is more complicated. many. [0003] Taking iron and steel smelting furnaces as an example, the wastewater includes cooling water, pickling wastewater, washing water, and slag flushing wastewater, etc. The exhaust gas contains sulfur, CO, suspended solids, and dust particles. Coke powder, etc., a large amount of water is required in the existing waste gas treatment process, and the water will generate new flue gas washing wastewater after washing th...

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Problems solved by technology

[0002] The "three wastes" of metal smelting furnaces pose a huge threat to the environment. Solid waste residues are generally treated by relatively fixed methods such as back burial, fine metallurgy, construction materials, and agricultural utilization. In contrast, the treatment of waste water and waste gas is more complicated. many

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