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Red mud harmless treatment system based on circulating fluidized bed boiler and working method of system

A circulating fluidized bed, harmless treatment technology, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve problems such as polluting the environment, iron oxide and aluminum oxide cannot be effectively used

Active Publication Date: 2021-04-20
XI AN JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

If it is discarded directly, it will pollute the environment on the one hand, and on the other hand, the iron oxide and aluminum oxide in the red mud will not be effectively used

Method used

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  • Red mud harmless treatment system based on circulating fluidized bed boiler and working method of system
  • Red mud harmless treatment system based on circulating fluidized bed boiler and working method of system
  • Red mud harmless treatment system based on circulating fluidized bed boiler and working method of system

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with accompanying drawing, and its content is explanation of the present invention rather than limitation:

[0041] like figure 1 , is a red mud harmless treatment system based on a circulating fluidized bed boiler of the present invention, including a red mud slurry dissolution tank 3, an ammonia water storage tank 4, a reducing agent slurry tank 7, a reducing agent slurry delivery system 8 and a reducing agent slurry injection system9.

[0042] like Figure 4 , The reducing agent slurry tank 7 is provided with a monitoring instrument 7-4, a reducing agent slurry outlet, a red mud slurry inlet and an ammonia water inlet, and the monitoring instrument 7-4 includes a thermometer, a pressure gauge, a density gauge and a visual liquid level gauge. The reducing agent slurry tank 7 is provided with a slurry tank heating device 7-1 and a slurry tank agitator 7-2, and the slurry tank agitator 7-2 is...

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Abstract

The invention discloses a red mud harmless treatment system based on a circulating fluidized bed boiler and a working method of the red mud harmless treatment system, and belongs to the technical field of industrial solid waste treatment and metallurgical industry waste utilization. A sediment discharge port is formed in the bottom of a red mud slurry dissolving tank, the red mud slurry dissolving tank is connected with a reducing agent slurry tank through a red mud slurry conveying pipe, and a red mud slurry transfer pump is arranged on the red mud slurry conveying pipe; an ammonia water storage tank is connected with a reducing agent slurry tank through an ammonia water conveying pipe, and an ammonia water transfer pump is arranged on the ammonia water conveying pipe; a reducing agent slurry outlet is connected with a reducing agent slurry injection system through a reducing agent slurry conveying system, and the reducing agent slurry injection system is arranged in a horizontal flue of the circulating fluidized bed boiler. According to the method, harmless treatment of the red mud is achieved, meanwhile, the denitration efficiency of the circulating fluidized bed boiler is improved, pollution is reduced, the enterprise cost is reduced, and meanwhile huge social benefits and economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of industrial solid waste treatment and metallurgical industry waste utilization, and specifically relates to a red mud harmless treatment system based on a circulating fluidized bed boiler and a working method thereof. Background technique [0002] Red mud is an industrial waste produced during the production of alumina in the metallurgical industry. The red mud slurry is strongly alkaline. Because it contains a large amount of iron oxide and looks similar to red soil, it is called red mud. Due to different ore grades, production methods and technical levels, about 1.0-1.8 tons of red mud will be discharged for every 1 ton of alumina produced. The main component of red mud is SiO 2 、Al 2 o 3 , CaO, Fe 2 o 3 It belongs to the first category of general industrial solid waste, which has relatively stable physical properties and is generally difficult to use directly. [0003] Studies have shown that alth...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/56
Inventor 邓磊史磊朱正荣白冰张妍马诗豪张世鑫车得福
Owner XI AN JIAOTONG UNIV
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