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Dechlorination system for co-processing washing fly ash by cement kiln and dechlorination method

A co-processing and cement kiln technology, applied in chemical instruments and methods, separation methods, solid waste removal, etc., can solve problems such as high chlorine content, difficult disposal, and increased system heat consumption

Pending Publication Date: 2021-05-11
ANHUI CONCH DESIGN & RES INST OF BUILDING MATERIALS CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Therefore, the co-processing of fly ash in cement kilns will greatly increase the heat consumption of the system
At the same time, the fly ash produced by the chlorine removal system has a high chlorine content and is difficult to dispose of

Method used

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  • Dechlorination system for co-processing washing fly ash by cement kiln and dechlorination method

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Embodiment Construction

[0032] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0033] In the present invention, in the absence of a contrary statement, the orientation words included in the term such as "upper, lower, top, bottom, far, near, side" only represent the orientation of the term in the normal use state, or It is a common term understood by those skilled in the art and should not be regarded as a limitation of the term.

[0034] see figure 1 Shown is a chlorine removal system for the co-processing of washed fly ash in a cement kiln. The chlorine removal system includes: a circulating fan 14, an air intake device 2, a lower cyclone separator 4, an upper cyclone separator 6, a heat exchanger 8, a cooling device 9, bag filter 10, ...

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Abstract

The invention discloses a dechlorination system for co-processing washing fly ash by a cement kiln and a dechlorination method. The dechlorination system is characterized in that an air taking device communicates with a feed-end chamber in a kiln system, an air outlet of a circulating fan communicates with an air outlet of the air taking device and an air inlet of a heat exchanger, and the air outlet of the air taking device further communicates with an air inlet of a lower-layer cyclone separator; an air outlet of the lower-layer cyclone separator communicates with an air inlet of an upper-layer cyclone separator, an ash falling opening of the upper-layer cyclone separator communicates with the air inlet of the lower-layer cyclone separator, and an air outlet of the upper-layer cyclone separator communicates with the air inlet of the heat exchanger; and an air outlet of the heat exchanger communicates with an air inlet of a cooler, an air outlet of the cooler communicates with an air inlet of a bag type dust collector, and an air outlet of the bag type dust collector communicates with air inlets of an induced draft fan and a circulating fan correspondingly. The dechlorination system and the dechlorination method improves the dechlorination efficiency, and achieve zero emission.

Description

technical field [0001] The invention relates to a chlorine removal system and a chlorine removal method for co-processing water-washed fly ash in a cement kiln. Background technique [0002] According to the "National List of Hazardous Wastes" (2016 edition), domestic waste incineration fly ash is classified as hazardous waste. The Cl- content in its chemical composition accounts for about 16%, and it can be co-processed after being washed with water. The washed fly ash has a Cl- content of about 1% and a water content of about 5%. If the washed fly ash is directly put into the calciner, in order to ensure the stable working condition of the calciner, it will inevitably increase the coal consumption. At the same time, when the amount of fly ash co-processed in the cement kiln is large, the chlorine content of the raw material is relatively high (Cl-≥0.015%). In order to ensure the normal operation of the clinker firing system, a bypass windproof system should be added to r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B01D50/00
CPCB09B2101/30B09B3/80B01D50/20
Inventor 轩红钟周金波刘守信宗青松蔡胜强张宗见李志强王斌张提提周先进刘永涛张东升徐寅生
Owner ANHUI CONCH DESIGN & RES INST OF BUILDING MATERIALS CO LTD
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