Method for preparing efficient desulfurizing agent by compounding activated sludge and waste activated carbon

The high-efficiency desulfurizer is prepared by compounding activated sludge and waste activated carbon, and the material performance is improved by using EDTA and tackifier, and the desulfurization performance is improved through high-temperature modification and dry distillation processes. The problems of complex processes and high cost in the existing technology are solved, and efficient and low-cost desulfurizer preparation is achieved.

CN119701905APending Publication Date: 2025-03-28SHANXI XINHUA CHEM
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Patent Information

Application Number
CN202411659951.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-20
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art has problems such as cumbersome process, high raw material cost and long preparation cycle in the preparation of desulfurizers, which are difficult to achieve large-scale application. At the same time, the thermal regeneration efficiency of activated carbon is low, resulting in a decrease in adsorption performance and mechanical strength.

Method used

By combining activated sludge and waste activated carbon, a high-efficiency desulfurization agent is prepared, and the carbon content and desulfurization properties of the material are improved by using EDTA complexing agent and tackifier, and the specific surface area and sulfur capacity of the desulfurization agent are improved through high-temperature modification and dry distillation processes.

Benefits of technology

The preparation of desulfurizer with high efficiency desulfurization performance, low gas resistance and high specific surface area is achieved, which reduces raw material costs and energy consumption, simplifies the process flow, and improves the market competitiveness of the products.

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Abstract

The invention particularly relates to a method for preparing an efficient desulfurizing agent by compounding activated sludge and waste activated carbon. Comprising the following steps: (1) respectively drying, grinding and sieving activated sludge and waste biological activated carbon; (2) mixing the activated sludge and the biological activated carbon powder, then adding water, EDTA (Ethylene Diamine Tetraacetic Acid) and a tackifier, uniformly mixing, and molding under the action of a press machine to obtain a molded material; (3) spreading the molding material on the ground, and airing for 1-5 days; (4) raising the furnace temperature to 200-600 DEG C, carrying out dry distillation on the molding material in the step (3), and keeping for 20-60 minutes; raising the temperature of the furnace to 800-950 DEG C, and introducing ammonia water for modification to obtain a desulfurizing agent; the problem of resource utilization of the activated sludge and the waste biological activated carbon of the water plant is solved, heavy metal elements in the two waste materials are comprehensively utilized, and the prepared carbon-containing desulfurizer is high in carbon content, high in adsorption performance and good in desulfurization performance; the desulfurizing agent is high in strength and small in gas resistance during later use.
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