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Low-energy-consumption calcium hydroxide production process
The invention relates to the technical field of calcium hydroxide preparation, and particularly discloses a low-energy-consumption calcium hydroxide production process which comprises the following steps: step 1, preparing materials: preparing crushed quick lime and water according to a water-to-material ratio of 0.5-0.55; step 2, adding water for digestion, adding quick lime and water into a digester according to a ratio, and stirring to complete the digestion process; 3, powder selection is conducted, specifically, the product obtained in the step 2 is introduced into a powder selection classifier for purification, separation and deslagging, and a calcium hydroxide product is obtained; 4, slag material circulation is conducted, specifically, the slag materials obtained in the step 3 are introduced into a powder selecting and grading machine through a circulating fan to be subjected to secondary separation, and a calcium hydroxide product in the waste residues is separated out; water in the second step is heated through a heat recovery unit, the heat recovery unit comprises a dust collection fan, a dust collection bin and a heat exchanger, the dust collection fan is located above the digester, dust-containing hot air above the digester is sucked into the dust collection bin through the dust collection fan, dust in the dust-containing hot air is filtered out through the dust collection bin, and the heat exchanger is used for heat exchange. An outlet of the dust collection bin is communicated with the heat exchanger, dust-containing hot air forms clean hot air after passing through the dust collection bin, the clean hot air enters the heat exchanger, a circulating pump capable of enabling water flow to flow into the heat exchanger is arranged outside the heat exchanger, and the water temperature can be increased to 35-45 DEG C through the heat exchanger. According to the scheme, the problem that heat of dust-containing hot gas cannot be recycled in an existing calcium hydroxide production process can be solved.
本申请涉及氢氧化钙制备技术领域，具体公开了一种低能耗的氢氧化钙生产工艺，其包括步骤一：配料，按水料比0.5～0.55准备破碎后的生石灰、水；步骤二：加水消化，按比例将生石灰与水加入消化器中搅拌，完成消化过程；步骤三：选粉，将步骤二得到的产物通入选粉分级机中进行净化分离除渣，得到氢氧化钙产物；步骤四：渣料循环，将步骤三中得到的渣料通过循环风机通入选粉分级机中进行二次分离，分离出废渣中的氢氧化钙产物；所述步骤二中的水温通过热量回收单元进行加热，热量回收单元包括收尘风机、集尘仓、换热器，所述收尘风机位于消化器的上方，收尘风机将消化器上方的含尘热空气吸入至集尘仓中，通过集尘仓将含尘热空气中的灰尘滤除，集尘仓的出口连通换热器，含尘热空气经过集尘仓后形成洁净热空气，洁净热空气进入换热器中，换热器外设有可将水流通入换热器的循环泵，通过换热器可将水温提升至35～45摄氏度。本方案可解决现有氢氧化钙生产工艺中无法将含尘热气进行热量回收利用的问题。
Low-energy-consumption calcium hydroxide production process
The invention relates to the technical field of calcium hydroxide preparation, and particularly discloses a low-energy-consumption calcium hydroxide production process which comprises the following steps: step 1, preparing materials: preparing crushed quick lime and water according to a water-to-material ratio of 0.5-0.55; step 2, adding water for digestion, adding quick lime and water into a digester according to a ratio, and stirring to complete the digestion process; 3, powder selection is conducted, specifically, the product obtained in the step 2 is introduced into a powder selection classifier for purification, separation and deslagging, and a calcium hydroxide product is obtained; 4, slag material circulation is conducted, specifically, the slag materials obtained in the step 3 are introduced into a powder selecting and grading machine through a circulating fan to be subjected to secondary separation, and a calcium hydroxide product in the waste residues is separated out; water in the second step is heated through a heat recovery unit, the heat recovery unit comprises a dust collection fan, a dust collection bin and a heat exchanger, the dust collection fan is located above the digester, dust-containing hot air above the digester is sucked into the dust collection bin through the dust collection fan, dust in the dust-containing hot air is filtered out through the dust collection bin, and the heat exchanger is used for heat exchange. An outlet of the dust collection bin is communicated with the heat exchanger, dust-containing hot air forms clean hot air after passing through the dust collection bin, the clean hot air enters the heat exchanger, a circulating pump capable of enabling water flow to flow into the heat exchanger is arranged outside the heat exchanger, and the water temperature can be increased to 35-45 DEG C through the heat exchanger. According to the scheme, the problem that heat of dust-containing hot gas cannot be recycled in an existing calcium hydroxide production process can be solved.
本申请涉及氢氧化钙制备技术领域，具体公开了一种低能耗的氢氧化钙生产工艺，其包括步骤一：配料，按水料比0.5～0.55准备破碎后的生石灰、水；步骤二：加水消化，按比例将生石灰与水加入消化器中搅拌，完成消化过程；步骤三：选粉，将步骤二得到的产物通入选粉分级机中进行净化分离除渣，得到氢氧化钙产物；步骤四：渣料循环，将步骤三中得到的渣料通过循环风机通入选粉分级机中进行二次分离，分离出废渣中的氢氧化钙产物；所述步骤二中的水温通过热量回收单元进行加热，热量回收单元包括收尘风机、集尘仓、换热器，所述收尘风机位于消化器的上方，收尘风机将消化器上方的含尘热空气吸入至集尘仓中，通过集尘仓将含尘热空气中的灰尘滤除，集尘仓的出口连通换热器，含尘热空气经过集尘仓后形成洁净热空气，洁净热空气进入换热器中，换热器外设有可将水流通入换热器的循环泵，通过换热器可将水温提升至35～45摄氏度。本方案可解决现有氢氧化钙生产工艺中无法将含尘热气进行热量回收利用的问题。
Low-energy-consumption calcium hydroxide production process
一种低能耗的氢氧化钙生产工艺
LUO MINGFEI (author) / YANG HUI (author) / LIU JIAWEN (author) / JEON SANG-SEUNG (author)
2024-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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