Quicklime circulating fluidized bed grading dry digestion system

A circulating fluidized bed and digestion system technology, applied in the field of dry digestion system, can solve the problems that slaked lime cannot meet the requirements of fluffy dry powder, insufficient digestion of quicklime, and high quality requirements of imported quicklime, so as to improve digestibility and efficiency Effect

CN108640538APending Publication Date: 2018-10-12江苏佳鑫环保工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-10-12

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Abstract

The invention discloses a quicklime circulating fluidized bed grading dry digestion system, and relates to the technical field of quicklime dry digestion systems. The system comprises a digestion tower, wherein the digestion tower comprises a venturi; a digestion tower is communicated, at the upper part of the venturi, with a feeding system and is communicated, at the lower part of the venture, with a desulfurizing tower; a fluidized bed area is formed above the venturi; the digestion tower is provided, above a fluidized bed area, with a water feeding device; the digestion tower is communicated, above the water feeding device, with a separation device; the separation device comprises a primary cyclone separator and a secondary cyclone separator; an inlet of the primary cyclone separator iscommunicated with the digestion tower; a lower outlet of the primary cyclone separator is communicated with the fluidized bed area; an upper outlet of the primary cyclone separator is communicated with an inlet of the secondary cyclone separator; the secondary cyclone separator comprises a hydrated lime outlet and a smoke outlet. According to the quicklime circulating fluidized bed grading dry digestion system disclosed by the invention, the digestibility of the quicklime can be improved, a requirement on quality of inlet quicklime is reduced, and smoke can be reused, so that energy is conserved and an influence on an environment is reduced.
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Description

technical field

[0001] The invention relates to the technical field of dry digestion systems, in particular to a graded dry digestion system for quicklime circulating fluidized beds. Background technique

[0002] As my country controls and reduces SO 2 With the continuous increase of emissions, flue gas desulfurization has entered a stage of rapid development, while the existing dry desulfurization and semi-dry desulfurization in the production of lime is mostly produced by mechanical agitation. The traditional mechanical agitation for quicklime digestion is in Water is added to the mixer to mix and digest quicklime powder and water to produce slaked lime. In the process of making slaked lime, the quicklime is not fully digested, and the obtained slaked lime cannot meet the requirement of uniform fluffy dry powder. Contents of the invention

[0003] The technical problem to be solved by the present invention is that quicklime is not digested sufficiently in the process of...

Examples

Embodiment

[0018] Example: a quicklime circulating fluidized bed graded dry digestion system, the structure is as follows figure 1 As shown, it includes a digestion tower 1. The digestion tower 1 includes a venturi 11. The digestion tower 1 is located at the upper part of the venturi 11 and is connected with a feeding system for providing quicklime raw materials. The lower part of the venturi 11 is connected with a desulfurization tower for providing high-temperature flue gas. , and a fluidized bed area 12 is formed above the Venturi 11, that is, quicklime enters the fluidized bed area 12 and is fluidized by high-temperature flue gas. The quicklime in the bed zone 12 provides moisture to react to generate slaked lime.

[0019] The digestion tower 1 is located above the water supply device and is connected with a separation device. The separation device includes a primary cyclone separator 3 and a secondary cyclone separator 4. The inlet of the primary cyclone separator 3 is connected to ...