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

A circulating fluidized bed and harmless treatment technology, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of iron oxide and aluminum oxide not being effectively used, polluting the environment, etc., and achieve the realization of Social and economic benefits, wide fuel adaptability, and easy utilization of ash

Active Publication Date: 2022-02-22
XI AN JIAOTONG UNIV
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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 its working method
  • Red mud harmless treatment system based on circulating fluidized bed boiler and its working method
  • Red mud harmless treatment system based on circulating fluidized bed boiler and its working method

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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] Such as 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] Such as 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 ...

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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 thereof, which belong to the technical field of industrial solid waste treatment and metallurgical industry waste utilization. There is a sediment discharge outlet at the bottom of the red mud slurry dissolving tank, and the red mud slurry dissolving tank is connected to the reducing agent slurry tank through the red mud slurry transport pipe, and the red mud slurry transfer pump is installed on the red mud slurry transport pipe; the ammonia water storage tank is transported through ammonia water The pipe is connected to the reducing agent slurry tank, and the ammonia water transportation pipe is equipped with an ammonia water transfer pump; the reducing agent slurry outlet is connected to the reducing agent slurry injection system through the reducing agent slurry delivery system, and the reducing agent slurry injection system is set at the level of the circulating fluidized bed boiler Inside the flue. The invention realizes the harmless treatment of the red mud, improves the denitrification efficiency of the circulating fluidized bed boiler, reduces pollution, reduces the cost of the enterprise, and realizes huge social and economic benefits at the same time.

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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Patent Type & Authority Patents(China)
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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