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A platform for research: civil engineering, architecture and urbanism
Method for preparing potash fertilizer by treating household garbage fly ash with cement kiln
The invention relates to the technical field of household garbage fly ash treatment, and particularly discloses a method for preparing a potash fertilizer by treating household garbage fly ash by using a cement kiln. The method comprises the following steps: S1, putting fly ash and a raw material into a cement kiln system for calcining, and then extracting high-chlorine flue gas through an efficient chlorine removal system; S2, quenching the high-chlorine flue gas to 400 DEG C, obtaining flue gas particles containing high-chlorine crystals and then subjected to dust removal, returning removed coarse particles to a flue gas chamber, further cooling fine ash to 180 DEG C or below, and then performing dust collection to obtain high-chlorine ash; S3, carrying out multi-stage washing on the high-chlorine ash, carrying out filter-pressing solid-liquid separation to obtain a high-chlorine ash washing solution, and sending the separated sludge back to a cement kiln system for co-processing; and S4, performing evaporative crystallization on the high-chlorine grey water washing liquid to separate out potassium chloride crystal powder with the purity of more than 98%, and using the potassium chloride crystal powder to prepare the potash fertilizer. The preparation method has the advantages that the influence of the household garbage fly ash on the environment is reduced, and the comprehensive utilization of the fly ash is realized.
本申请涉及生活垃圾飞灰处理的技术领域，具体公开了一种利用水泥窑处置生活垃圾飞灰制钾肥方法，包括以下步骤：S1、将飞灰与生料一起放入水泥窑系统中进行煅烧，随后通过高效除氯系统抽取高氯烟气；S2、将高氯烟气进行骤冷至400℃，获得含有高氯结晶的烟气颗粒后除尘，脱除的粗颗粒返回烟室，细灰进一步冷却至180℃以下后进行收尘得到高氯灰；S3、高氯灰经多级水洗，并经压滤固液分离后得到高氯灰水洗液，分离出的污泥送回至水泥窑系统协同处置；S4、高氯灰水洗液进行蒸发结晶析出纯度大于98%的氯化钾结晶粉末，用以制作钾肥。本申请的制备方法具有减少生活垃圾飞灰对环境的影响并实现飞灰的综合利用的优点。
Method for preparing potash fertilizer by treating household garbage fly ash with cement kiln
The invention relates to the technical field of household garbage fly ash treatment, and particularly discloses a method for preparing a potash fertilizer by treating household garbage fly ash by using a cement kiln. The method comprises the following steps: S1, putting fly ash and a raw material into a cement kiln system for calcining, and then extracting high-chlorine flue gas through an efficient chlorine removal system; S2, quenching the high-chlorine flue gas to 400 DEG C, obtaining flue gas particles containing high-chlorine crystals and then subjected to dust removal, returning removed coarse particles to a flue gas chamber, further cooling fine ash to 180 DEG C or below, and then performing dust collection to obtain high-chlorine ash; S3, carrying out multi-stage washing on the high-chlorine ash, carrying out filter-pressing solid-liquid separation to obtain a high-chlorine ash washing solution, and sending the separated sludge back to a cement kiln system for co-processing; and S4, performing evaporative crystallization on the high-chlorine grey water washing liquid to separate out potassium chloride crystal powder with the purity of more than 98%, and using the potassium chloride crystal powder to prepare the potash fertilizer. The preparation method has the advantages that the influence of the household garbage fly ash on the environment is reduced, and the comprehensive utilization of the fly ash is realized.
本申请涉及生活垃圾飞灰处理的技术领域，具体公开了一种利用水泥窑处置生活垃圾飞灰制钾肥方法，包括以下步骤：S1、将飞灰与生料一起放入水泥窑系统中进行煅烧，随后通过高效除氯系统抽取高氯烟气；S2、将高氯烟气进行骤冷至400℃，获得含有高氯结晶的烟气颗粒后除尘，脱除的粗颗粒返回烟室，细灰进一步冷却至180℃以下后进行收尘得到高氯灰；S3、高氯灰经多级水洗，并经压滤固液分离后得到高氯灰水洗液，分离出的污泥送回至水泥窑系统协同处置；S4、高氯灰水洗液进行蒸发结晶析出纯度大于98%的氯化钾结晶粉末，用以制作钾肥。本申请的制备方法具有减少生活垃圾飞灰对环境的影响并实现飞灰的综合利用的优点。
Method for preparing potash fertilizer by treating household garbage fly ash with cement kiln
一种利用水泥窑处置生活垃圾飞灰制钾肥方法
ZHANG DEQUN (author)
2021-12-31
Patent
Electronic Resource
Chinese
IPC:
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
C04B
Kalk
,
LIME
/
C05D
INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C
,
Anorganische, nicht von den Unterklassen C05B, C05C umfasste Düngemittel
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