Disclosed is a fly ash recycling treatment device, comprising a first-stage rotary kiln (1), a second-stage rotary kiln (2), a crystallization device (3) and a waste gas treatment device (4), wherein the first-stage rotary kiln (1) and the second-stage rotary kiln (2) are each provided with an exhaust port (1.1, 2.2) and a discharge port (1.2) at the tail portion thereof; the exhaust port (1.1) of the first-stage rotary kiln is in communication with the waste gas treatment device (4); the discharge port (1.2) of the first-stage rotary kiln is in communication with a feed port (2.1) of the second-stage rotary kiln; and the exhaust port (2.2) of the second-stage rotary kiln is in communication with the crystallization device (3). By means of the device, chlorine salts and a small amount of a heavy metal are separated from light-weight fly ash by means of a two-stage combustion process, and the chlorine salts and the small amount of the heavy metal can be treated by means of a subsequent process in a later period and then used as industrial salts, thereby greatly reducing the amount of secondary pollutants generated.
F23G 5/44 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets ou de combustibles pauvres Parties constitutivesAccessoires
F27B 7/42 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
F27D 17/00 - Dispositions pour l'utilisation de la chaleur perdueDispositions pour l'utilisation ou pour l'élimination des gaz résiduaires
C04B 33/135 - Résidus de combustion, p. ex. cendres volantes, résidus d'incinération
A fly ash multi-stage recycling treatment device, comprising a first-section rotary kiln, a second-section rotary kiln, a crystallization device, a first high-temperature dust remover, and a waste gas treatment device. Each of the tails of the first-section rotary kiln and the second-section rotary kiln is provided with an exhaust port and a discharge port; the exhaust port of the first-section rotary kiln is communicated with an air inlet of the first high-temperature dust remover; an exhaust port of the first high-temperature dust remover is communicated with the waste gas treatment device; a dust discharge port of the first high-temperature dust remover is communicated with a collection device; the discharge port of the first-section rotary kiln is communicated with a feeding port of the second-section rotary kiln; the exhaust port of the second-section rotary kiln is communicated with the crystallization device. In the present invention, chlorine salt and a small amount of heavy metal are separated from light fly ash by means of a two-section combustion process, the chlorine salt and the small amount of heavy metal can also be used as industrial salt after being treated by a subsequent process in the later period, the separated light fly ash is subjected to dust removal by means of the high-temperature dust remover, then dust is collected and used for producing light bricks, and secondary pollutants are basically not generated.
F27B 7/02 - Fours à tambours rotatifs, c.-à-d. horizontaux ou légèrement inclinés à plusieurs chambres ou plusieurs tambours
F27B 7/42 - Aménagement des dispositifs de commande, de surveillance, d'alarme ou des dispositifs similaires
F23G 7/06 - Procédés ou appareils, p. ex. incinérateurs, spécialement adaptés à la combustion de déchets particuliers ou de combustibles pauvres, p. ex. des produits chimiques de gaz d'évacuation ou de gaz nocifs, p. ex. de gaz d'échappement
brevets