Secondary aluminum ash denitrification device system and method
A secondary aluminum and denitrification technology, applied in the preparation/separation of ammonia, etc., can solve the problems of large water consumption, large waste water discharge, serious equipment corrosion, etc., achieve complete removal, efficient removal, and reduce water consumption Effect
Pending Publication Date: 2022-04-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology
[0005] The purpose of the present invention is to provide a secondary aluminum ash denitrification device system and method. The device system solves the problems of serious equipment corrosion, incomplete removal of nitrides, large water consumption and large waste water discharge. Through the development of Warm ball milling device, through heating and wet milling to achieve efficient removal of aluminum nitride in secondary aluminum ash
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Embodiment 1
[0045] This embodiment provides a secondary aluminum ash denitrification device system, such as figure 1 As shown, the device system includes a reaction unit 100 and a tail gas absorption unit 200;
[0046] The reaction unit 100 includes a ball milling device 1; the ball milling device is provided with a steam inlet pipe 2, a temperature monitoring assembly 3, an ammonia exhaust pipe 6 and a steam condensate drain pipe 7; the upper part of the ball milling device is provided with The inlet / outlet port 4; the inside of the ball mill is provided with a filter 5; the ammonia exhaust pipe 6 is connected to the tail gas absorption unit 200.
[0047] The tail gas absorption unit 200 comprises a first spray device 8, a second spray device 12, an air induction device 10, a first absorption tower 9 and a second absorption tower 11; The inlet of the tower 9 is connected; the first absorption tower 9 is connected with the first spray device 8; the spray port of the first spray device 8 ...
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The invention provides a secondary aluminum ash denitrification device system and method. The device system comprises a reaction unit and a tail gas absorption unit, the reaction unit comprises a ball milling device; a steam inlet pipe and an ammonia gas exhaust pipe are arranged on the ball milling device; and the ammonia gas exhaust pipe is connected with the tail gas absorption unit. The device system is a ball-milling device with temperature, an interlayer of the ball-milling device heats reaction materials through steam heating and carries out ball-milling mixing, rapid hydrolysis of aluminum nitride is achieved, generated ammonia gas is smoothly exhausted into a tail gas absorption unit through an ammonia gas exhaust pipe, and rapid reaction of secondary aluminum ash is facilitated; the tail gas absorption unit is used for converting ammonia gas into ammonia water; efficient removal of aluminum nitride in the secondary aluminum ash is achieved through heating and wet grinding, and meanwhile synchronous emission of ammonia gas generated in the removal process is achieved.
Description
technical field [0001] The invention belongs to the field of safe disposal and resource utilization of hazardous waste, and in particular relates to a secondary aluminum ash denitrification device system and method. Background technique [0002] Secondary aluminum ash is a hazardous waste produced by the electrolytic aluminum, aluminum processing and aluminum recycling industries, with an annual emission of more than 4 million tons. Due to the presence of aluminum nitride in the secondary aluminum ash, irritating ammonia gas is released when it meets water, causing serious environmental pollution. The National Hazardous Waste List defines secondary aluminum ash as a hazardous waste with reactive properties. Efficient removal of aluminum nitride from secondary aluminum ash is an inevitable condition for its resource utilization. [0003] At present, the secondary aluminum ash denitrification treatment methods can be roughly divided into three methods: fire denitrification, ...
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Login to View More IPC IPC(8): A62D3/35A62D3/20C01C1/02C22B3/00C22B7/02A62D101/45
Inventor 李占兵李会泉李少鹏刘青青武文粉陈艳何珊
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI