A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR WASHING REFUSE INCINERATION ASH WITH WATER
To provide a method for washing refuse incineration ash with water, in which refuse incineration ash to be converted to cement raw fuel is mixed with water to prepare slurry, the slurry is subjected to pressure filtration of a regular washing type, and in addition, a filtration residue is washed with water, so as to obtain washed ash (a dewatered cake) with reduced amounts of chlorine and the like that cause damage when the refuse incineration ash is used as cement raw fuel, and in which the obtained dewatered cakes have high uniformity enabling easy handling, while a use amount of water is reduced as much as possible.SOLUTION: A use amount of water in preparing refuse incineration ash slurry is 5.0-8.5 times by mass relative to refuse incineration ash, and a use amount of washing water in washing a filtration residue with water after subjecting the slurry to pressure filtration and dewatering, is 2-5 times by mass relative to the refuse incineration ash. Further, in a use amount of water in preparing the refuse incineration ash slurry, a slurry solid content concentration is 6.0-15%, and a use amount of washing water in washing the pressure-filtered and dewatered filtration residue, with water, is 2-5 times by volume relative to a filter chamber volume of a filter press.SELECTED DRAWING: None
【課題】 ゴミ焼却灰をセメント原燃料とするため、水と混合してスラリーを調製し、これを正洗浄式のフィルタープレスにかけ、さらにろ過残渣を水洗することによりセメント原燃料とする際に障害となる塩素量などを低減した洗浄灰（脱水ケーキ）を得るゴミ焼却灰の水洗処理方法において、水の使用量をできるだけ低減しつつ、得られる脱水ケーキも取り扱いやすい均一性の高いものとする。【解決手段】 ゴミ焼却灰スラリーを調製する際の水の使用量をゴミ焼却灰の５．０質量倍～８．５質量倍とすると共に、プレスして脱水した後のろ過残渣を水洗する際の洗浄水の使用量を、ゴミ焼却灰の２質量倍～５質量倍とする。また、ゴミ焼却灰スラリーを調製する際の水の使用量をスラリー固形分濃度が６．０～１５％とすると共に、プレスして脱水した後のろ過残渣を水洗する際の洗浄水の使用量を、フィルタープレスのろ室容積の２～５容量倍とする。【選択図】 なし
METHOD FOR WASHING REFUSE INCINERATION ASH WITH WATER
To provide a method for washing refuse incineration ash with water, in which refuse incineration ash to be converted to cement raw fuel is mixed with water to prepare slurry, the slurry is subjected to pressure filtration of a regular washing type, and in addition, a filtration residue is washed with water, so as to obtain washed ash (a dewatered cake) with reduced amounts of chlorine and the like that cause damage when the refuse incineration ash is used as cement raw fuel, and in which the obtained dewatered cakes have high uniformity enabling easy handling, while a use amount of water is reduced as much as possible.SOLUTION: A use amount of water in preparing refuse incineration ash slurry is 5.0-8.5 times by mass relative to refuse incineration ash, and a use amount of washing water in washing a filtration residue with water after subjecting the slurry to pressure filtration and dewatering, is 2-5 times by mass relative to the refuse incineration ash. Further, in a use amount of water in preparing the refuse incineration ash slurry, a slurry solid content concentration is 6.0-15%, and a use amount of washing water in washing the pressure-filtered and dewatered filtration residue, with water, is 2-5 times by volume relative to a filter chamber volume of a filter press.SELECTED DRAWING: None
【課題】 ゴミ焼却灰をセメント原燃料とするため、水と混合してスラリーを調製し、これを正洗浄式のフィルタープレスにかけ、さらにろ過残渣を水洗することによりセメント原燃料とする際に障害となる塩素量などを低減した洗浄灰（脱水ケーキ）を得るゴミ焼却灰の水洗処理方法において、水の使用量をできるだけ低減しつつ、得られる脱水ケーキも取り扱いやすい均一性の高いものとする。【解決手段】 ゴミ焼却灰スラリーを調製する際の水の使用量をゴミ焼却灰の５．０質量倍～８．５質量倍とすると共に、プレスして脱水した後のろ過残渣を水洗する際の洗浄水の使用量を、ゴミ焼却灰の２質量倍～５質量倍とする。また、ゴミ焼却灰スラリーを調製する際の水の使用量をスラリー固形分濃度が６．０～１５％とすると共に、プレスして脱水した後のろ過残渣を水洗する際の洗浄水の使用量を、フィルタープレスのろ室容積の２～５容量倍とする。【選択図】 なし
METHOD FOR WASHING REFUSE INCINERATION ASH WITH WATER
ゴミ焼却灰の水洗処理方法
NAKAMURA AKINORI (author) / HIRAYAMA HIROKI (author) / ARII TSUNEYUKI (author)
2023-01-20
Patent
Electronic Resource
Japanese
Refuse incineration at Minneapolis
| Engineering Index Backfile | 1940
Incineration and Alternative Refuse Disposal Processes
| ASCE | 2021
Incineration and alternative refuse disposal processes
| Engineering Index Backfile | 1954