System and method for calcining treatment and resource utilization of sugar-making filter mud

Abstract

The invention provides a system for calcining treatment and resource utilization of sugar-making filter mud. The system comprises a pulverized coal preparation system, a feeding system, a calcining system, a waste heat recovery system, a flue gas environment-friendly up-to-standard emission treatment system and a quick lime recovery system, Raw material coal is prepared into pulverized coal as auxiliary fuel, crude sugar filter mud is crushed, the pulverized coal and the crude sugar filter mud are simultaneously added into a calcining furnace, ash generated after calcining is discharged and cooled to serve as a quick lime material; flue gas generated after calcination enters a waste heat boiler to be subjected to heat recycling, saturated steam is generated, the flue gas obtained after heat exchange enters a denitration device to be subjected to denitration treatment, the flue gas obtained after denitration exchanges heat with air and then is subjected to dust removal, and clean flue gas is obtained; and air heated by the flue gas is introduced into the calcining furnace as combustion-supporting air, so that the temperature of the combustion-supporting air entering the calcining furnace is integrally increased. Reduction and harmless treatment of the sugar-making filter mud are achieved, meanwhile, quick lime generated in the high-temperature calcination process, namely the high-temperature decomposition reaction process, is recycled to achieve the purpose of resource utilization, high-temperature flue gas waste heat generated in calcination is recycled to generate saturated steam, and the purpose of energy conservation in the environment-friendly treatment process is achieved.

Description

technical field [0001] The invention relates to a system and method for reducing, harmless, resourceful and environmentally friendly treatment of sugar filter mud produced in the production process of the sugar industry, and belongs to the technical field of environmental protection. Background technique [0002] The clarification process adopted by my country's sugar industry is mainly divided into two types: sulfurous acid method and carbonic acid method. Among them, the sugar produced by the sulfurous acid method has a high color value and is easy to change color, which is not conducive to long-term storage, and its quality is poor, which greatly affects the appearance and sales of the product; the sugar produced by the carbonic acid method has high purity, low color value and storage The time is relatively long, which is conducive to the sales of products. Therefore, under the existing market economy conditions, the sulfurous acid method is gradually replaced by the car...

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Problems solved by technology

[0010] The object of the present invention is to propose a system and method for calcination treatment and resource utilization of sugar filter mud in view of the problems of complex operation, heavy manual workload, and inability to efficiently utilize resources in the above sugar filter mud treatment process. In order to realize the reduction and harmless treatment of sugar filter mud, and at the same time recover the quicklime produced in the high-temperature calcination process, that is, the pyrolysis reaction process, to realize the purpose of resource utilization, and recycle the high-temperature flue gas waste heat generated by calcination to produce saturated Steam, to achieve the purpose of energy saving in the process of environmental protection

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