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29-09-2010 дата публикации

Method for preparing high-concentration SO2 flue gas and active CaO by using phosphogypsum and decomposing furnace

Номер: CN0101844748A
Автор: ZILIN DU, RONG FU, CHAO XIANG, GUANG YANG, YIHENG YE, GUOSHENG YV, GUOBIN ZHAO, JIAQIANG ZHAO, DU ZILIN, FU RONG, XIANG CHAO, YANG GUANG, YE YIHENG, YV GUOSHENG, ZHAO GUOBIN, ZHAO JIAQIANG
Принадлежит:

The invention relates to a method for preparing high-concentration SO2 flue gas and active CaO by using phosphogypsum and a decomposing furnace, and belongs to the technical fields of comprehensive utilization of resources of building materials and industrial solid rejected materials and chemical industry. The method comprises the following steps of: a, mixing phosphogypsum with flue gas at 700 DEG C in a broken dryer to remove complete free water and part of crystal water, allowing the mixture to stay for 1 to 2 seconds before entering a pneumatic drying device, and performing heat exchange with the flue gas at 700 DEG C to further remove residual crystal water and generate anhydrous gypsum; b, raising the temperature of the anhydrous gypsum at 40 DEG C through a vortex preheating system until the temperature reaches 800 DEG C, and allowing the anhydrous gypsum to enter the bottom of the decomposing furnace, and performing a decomposition reaction in an improved decomposing furnace which ...

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Номер записи: 1
24-08-2011 дата публикации

Method for preparing high-concentration SO2 flue gas and active CaO by using phosphogypsum and decomposing furnace

Номер: CN0101844748B
Автор: DU ZILIN, FU RONG, XIANG CHAO, YANG GUANG, YE YIHENG, YV GUOSHENG, ZHAO GUOBIN, ZHAO JIAQIANG, ZILIN DU, RONG FU, CHAO XIANG, GUANG YANG, YIHENG YE, GUOSHENG YV, GUOBIN ZHAO, JIAQIANG ZHAO
Принадлежит:

The invention relates to a method for preparing high-concentration SO2 flue gas and active CaO by using phosphogypsum and a decomposing furnace, and belongs to the technical fields of comprehensive utilization of resources of building materials and industrial solid rejected materials and chemical industry. The method comprises the following steps of: a, mixing phosphogypsum with flue gas at 700 DEG C in a broken dryer to remove complete free water and part of crystal water, allowing the mixture to stay for 1 to 2 seconds before entering a pneumatic drying device, and performing heat exchange with the flue gas at 700 DEG C to further remove residual crystal water and generate anhydrous gypsum; b, raising the temperature of the anhydrous gypsum at 40 DEG C through a vortex preheating systemuntil the temperature reaches 800 DEG C, and allowing the anhydrous gypsum to enter the bottom of the decomposing furnace, and performing a decomposition reaction in an improved decomposing furnace which ...

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Номер записи: 2