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Method for applying lime sludge of sugar refining waste to flue gas desulfurization

A technology for waste and solid waste, applied in separation methods, chemical instruments and methods, calcium/strontium/barium sulfate, etc., can solve the problems of sulfur dioxide pollution, increased production costs, poor comprehensive benefits, etc. Benefit, the effect of saving system operating costs

Inactive Publication Date: 2013-05-01
山东星光生物科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

However, because these methods have problems in the supply of absorbents, sales of by-products and process technology, they can only solve the problem of sulfur dioxide pollution, the overall benefit is poor, and the implementation brings problems such as increased production costs. Factories still take direct emissions approach

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  • Method for applying lime sludge of sugar refining waste to flue gas desulfurization

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Embodiment

[0017] The filter mud with a calcium carbonate content of 73% produced by the sugar industry is pulverized by a ball mill to obtain a filter mud slurry with smaller particles, and the particle size of more than 95% of the filter mud slurry is less than 60 μm. The filtered mud slurry is pumped into the absorption tower by the slurry supply pump. The original flue gas from the dust collector is led to the flue gas desulfurization system through the flue, and after passing through the original flue gas baffle, it enters the absorption tower for desulfurization reaction. The desulfurization tower is an empty spray tower with glass flakes as memory, and there are three spray layers inside. The flue gas enters the absorption tower tangentially, turns upward at 90o, and fully contacts with the sprayed slurry to remove it. SO 2 , the temperature of the original flue gas is further reduced to about 55°C, each spray layer corresponds to a circulating slurry pump, and a second-level bui...

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Abstract

The invention relates to a method for applying lime sludge of sugar refining waste to flue gas desulfurization. The method is characterized in that solid waste lime sludge generated by a sugar refinery adopting a carbonic acid method serves as a flue gas desulfurization agent, and is smashed to form lime sludge liquid; the lime sludge liquid is pumped into an absorption tower by a sludge pump; original flue gas from a deduster enters the absorption tower for desulfurization reaction; a pH value of the lime sludge liquid is controlled at 4.5-5.5; the temperature of the flue gas is controlled; desulfurization is achieved by multi-stage spraying; calcium sulfite generated in the reaction is subjected to forced oxidation by air blown in by an oxidation fan, in a circulating sludge tank at the bottom of the absorption tower; and gypsum is generated finally. According to the method, the lime sludge serves as the flue gas desulfurization agent for the first time; a brand-new recycling approach is provided for the solid waste lime sludge generated by the sugar refinery adopting the carbonic acid method; a more economical desulfurization agent is provided for the flue gas desulfurization of a heat-engine plant; purposes of treatment of wastes with processes of the wastes against one another, energy conservation and emission reduction are achieved; an environmental benefit and an economic benefit are increased; and the system operation cost is saved for an enterprise greatly.

Description

technical field [0001] The invention belongs to the technical field of industrial "three wastes" treatment and comprehensive utilization, and in particular relates to a method for using filter mud of sugar-making waste as a flue gas desulfurizer. Background technique [0002] At present, my country's sugar cane sugar production basically adopts carbonation process and sulfurous acid process, and a large amount of solid waste filter mud will be generated in the production process. And slaked lime, the calcium carbonate precipitation produced adsorbs the colloidal impurities and pigments in the sucrose juice, so as to achieve the purpose of removing non-sugar in the sucrose juice. The main component of carbonation filter mud is calcium carbonate, with a content of more than 70%. Carbonation filter mud has a large discharge volume, low organic matter content, and basically no agricultural value. Most carbonation sugar factories fill them in the wilderness, occupying a large amou...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50C01F11/46C04B11/02
Inventor 曹永兴潘永胜于庆伟刘旭东李宁周焕霞张素丽李霞
Owner 山东星光生物科技有限公司
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