Method and device for removing high-concentration dust in flue gas of glass kiln

Abstract

The invention discloses a method and a device for removing high-concentration dust in flue gas of a glass kiln and belongs to the field of environmental protection. The method comprises the following steps: receiving high-temperature flue gas exhausted by the glass kiln by using a waste heat boiler; adding tempering substances for tempering and dedusting the high-temperature flue gas; adding a reducing agent in the dedusted high-temperature flue gas and performing denitration treatment on the high-temperature flue gas, enabling the high-temperature flue gas subjected to denitration treatment to return to the waste heat boiler, and cooling the high-temperature flue gas to form low-temperature flue gas; performing desulfurization treatment on the low-temperature flue gas by a wet flue gas desulfurization process or a semi-dry desulfurization process; performing dedusting treatment on the low-temperature flue gas and exhausting the treated gas by a chimney. The waste heat boiler in the device comprises a high temperature side and a low temperature side, wherein the high temperature side is divided into an area A and an area B; the area A, an electric precipitator, a mechanical pre-trapping device, denitration equipment, the area B, the low temperature side, a draught fan, desulfurization equipment, a wet electric precipitator and the chimney are sequentially connected. The low discharge of pollutants in the flue gas of the glass kiln is realized, so that high requirement of people on the environment quality is met.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method and a device for removing high-concentration dust in flue gas of a glass furnace. Background technique [0002] The flue gas in the glass industry is characterized by a small amount of flue gas, but a high concentration of pollutants, especially NO in the flue gas x The concentration is very high. When burning inferior petroleum coke powder, SO in the flue gas 2 The dust has the characteristics of low melting point, fine particles, small specific resistance, etc., and the temperature of the flue gas is high, so it is very difficult to capture the dust in the above flue gas. [0003] There are about 390 large-scale glass furnaces nationwide, and nearly 5,000 small glass furnaces. With the "Twelfth Five-Year Plan" countries to PM 2.5 With the deepening of key governance, the flue gas from the glass kiln is basically untreated and directly emitted SO 2 , SO 3 , ...

AI Technical Summary

Problems solved by technology

Due to the high temperature of the flue gas, the low melting point of the dust and the strong viscosity of the dust, it is difficult to choose the filter bag of the bag filter. Even if the high temperature filter material is used, the service life is usually not more than one year, and there are often risks of burning and clogging , the operating pressure drop is large, and the operating cost is high; in addition to considering the temperature factor, the average particle size of the high-temperature electrostatic precipitator is fine, the melting point of the dust is low, and the viscosity is strong. The technical difficulties of using the ele

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