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Sodium bicarbonate dry method desulfurization ash resourceful treatment method

A dry desulfurization ash and treatment method technology, applied in the field of circular economy, achieves significant economic and social benefits, and solves environmental problems

Inactive Publication Date: 2020-01-17
南京金瀚环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the desulfurization ash after baking soda desulfurization is solid waste, and there is no good way to deal with it at present, so it can only be used for landfill

Method used

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  • Sodium bicarbonate dry method desulfurization ash resourceful treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] At room temperature, use a liquid-solid ratio of 2.2:1 to dissolve and dilute baking soda dry desulfurization ash with industrial clean water or condensed water in the production process (the temperature of the water is controlled at 35-85 degrees, and steam heating is used when the water temperature is low). At the same time, clarifiers PAC and PAM were added, compressed air was introduced, and the slurry was stirred for 30 minutes to obtain a uniform slurry. During the stirring process, monitor the temperature of the slurry, and when the temperature is lower than 35 degrees, heat the slurry to rise to 35-85 degrees. Stop stirring and heating, and let it stand for 60-90 minutes. When the suspended matter in the slurry is completely settled, discharge the sediment at the bottom, press filter the sediment, and send the obtained filter cake to the gas coal yard. The filter press filtrate can be recycled for use in Dilute the desulfurization ash; filter the upper clarified...

Embodiment 2

[0024] At room temperature, use a liquid-solid ratio of 2.5:1, use industrial clean water or condensed water in the production process (the temperature of the water is controlled at 35-85 degrees, and use steam heating when the water temperature is low) to dissolve and dilute the dry desulfurization ash of baking soda, Add PAC and PAM at the same time, feed compressed air, and stir the slurry for 30 minutes to obtain a uniform slurry. During the stirring process, monitor the temperature of the slurry, and when the temperature is lower than 35 degrees, heat the slurry to rise to 35-85 degrees. Stop stirring and heating, and let it stand for 60-90 minutes. When the suspended matter in the slurry is completely settled, discharge the sediment at the bottom, press filter the sediment, and send the obtained filter cake to the gas coal yard. The filter press filtrate can be recycled for use in Dilute desulfurization ash. Filter the upper clear liquid after the suspension is complete...

Embodiment 3

[0026] At room temperature, use a liquid-solid ratio of 3:1, dissolve and dilute baking soda dry desulfurization ash with industrial clean water or condensed water in the production process (the temperature of the water is controlled at 35-85 degrees), and add PFC at the same time to carry out the slurry Mechanical stirring was performed for 30 minutes to obtain a homogeneous slurry. During the stirring process, monitor the temperature of the slurry, and when the temperature is lower than 35 degrees, heat the slurry to rise to 35-85 degrees. Stop stirring and heating, and let it stand for 60-90 minutes. When the suspended matter in the slurry is completely settled, discharge the sediment at the bottom, press filter the sediment, and send the obtained filter cake to the gas coal yard. The filter press filtrate can be recycled for use in Dilute the desulfurization ash; filter the upper clear liquid after the suspension is completely precipitated, add sulfuric acid to the obtaine...

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Abstract

The invention discloses a sodium bicarbonate dry method desulfurization ash resourceful treatment method which comprises the following steps: adding water into desulfurization ash for leaching, tempering and clarifying an obtained leaching solution, performing solid-liquid separation, and then performing evaporation, concentration, crystallization, centrifugation and drying to obtain an anhydroussodium sulfate product. According to the method, the baking soda dry method desulfurization ash is converted into chemical raw materials for production of anhydrous sodium sulfate from solid waste needing to be buried originally, so that the environmental protection problem is solved, waste is turned into wealth, and considerable economic benefits can be generated.

Description

technical field [0001] The invention relates to a solid waste resource treatment technology, which also belongs to circular economy. Background technique [0002] At present, as environmental protection requirements become more and more stringent, coke oven flue gas, gas boiler flue gas, and heating furnace flue gas all need to be desulfurized, but the flue gas from these industries has low sulfur content and is very suitable for Baking soda dry desulfurization. However, the desulfurization ash after baking soda desulfurization is solid waste, and there is no good way to deal with it at present, and it can only be used for landfill. And sodium sulfate is an important industrial raw material, and the market demand is very large. [0003] The invention extracts the sodium sulfate from the desulfurization ashes of dry-process baking soda and uses it as a chemical raw material, which can be widely used in detergent, glass and other industries. This not only solves the outlet ...

Claims

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Application Information

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IPC IPC(8): C01D5/16
CPCC01D5/16
Inventor 孙军如
Owner 南京金瀚环保科技有限公司
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