Fuel coal furnace exhaust gas calcium water bath spraying composite desulfurizing process and its special equipment

A desulfurization process and flue gas technology, applied in the direction of dispersed particle separation, chemical instruments and methods, separation methods, etc., can solve the problems of low desulfurization efficiency, short reaction time between desulfurization medium and flue gas, low utilization rate of desulfurization medium, etc. Achieve the effects of wide application range, advanced technical indicators and simple process operation

Inactive Publication Date: 2004-05-05
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology

The currently applied flue gas desulfurization technology methods can be roughly divided into two categories, namely dry desulfurization technology and wet desulfurization technology. Both methods have their own advantages and disadvantages, but the main problems are: short reaction time between desulfurization medium and flue gas, The desulfurization efficiency is not high, and the utilization rate of desulfurization medium is low, which is particularly prominent in small and medium-sized coal-fired furnaces

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  • Fuel coal furnace exhaust gas calcium water bath spraying composite desulfurizing process and its special equipment
  • Fuel coal furnace exhaust gas calcium water bath spraying composite desulfurizing process and its special equipment
  • Fuel coal furnace exhaust gas calcium water bath spraying composite desulfurizing process and its special equipment

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Embodiment Construction

[0030] As shown in the figure is a schematic diagram of LSD-800 single-grate direct-fired domestic boiler flue gas calcium spraying water bath composite desulfurization process system. In the figure, 11 is a coal-fired boiler; 12 is a calcium spraying system; 13 is a water bath purifier; 14 is a circulating water system; 15 is a boiler induced draft fan.

[0031] In the figure, the calcium spraying system is composed of an air compressor (compressed air outlet pressure is 0.7Mpa), a screw conveyor, and a gas-solid mixer. The powdery desulfurization medium (such as calcium carbonate, etc.) is sent into the gas-solid mixer by the screw conveyor and mixed evenly with the high-speed flowing compressed air, and sprayed into the coal-fired furnace through the connecting pipe fixed on the furnace wall for high-temperature combustion. area for decomposition and desulfurization reactions. The reaction product, the undecomposed and reacted desulfurization medium, and the fly ash produc...

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Abstract

A process for desulfurizing the fume of coal-burning furnace by spraying calcium and water bath features that the desulfurizing medium is sprayed into high-temp region in combustion box, where it is burning and takes part in desulfurizing reaction, the resultant along with unreacted lime stone, calcium oxide and flyash, and the fume come in water bath to generate alkaline slurry for absorbing SO2, and the resultant, flyash and deposit in water pool are discharged. Its apparatus is composed of boiler, Ca spraying system, water bath cleaner, circulating water system, and draught fan.

Description

[0001] (1) Technical field: The patent of the present invention relates to a composite desulfurization process technology of coal-fired furnace and kiln spraying calcium water bath, which belongs to the technical field of chemical purification of waste gas. (two), background technology: [0002] my country is the largest coal producer and consumer in the world, and coal accounts for 75% of my country's primary energy consumption. However, due to the low efficiency of combustion and utilization, a large amount of pollutants produced during coal burning and coal processing lead to serious air pollution, acid rain and water pollution. In 1999, the area covered by acid rain caused by soot-based air pollution in the country had expanded to about 30% of the total land area, and the annual economic losses caused by sulfur dioxide and acid rain reached more than 100 million yuan. 84% of my country's total coal output is used for direct combustion, so 90% of sulfur dioxide emissions an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/79
Inventor 薛勇王成端陈海焱
Owner SOUTHWEAT UNIV OF SCI & TECH
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