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System and method for recycling water vapor during roasting aluminum hydroxide

A technology of aluminum hydroxide and water vapor, which is applied in chemical instruments and methods, inorganic chemistry, aluminum compounds, etc., can solve the problems of increased alumina production cost, increased power consumption, waste of water resources, etc., to save electricity consumption and The effect of fuel consumption, reduction of exhaust gas, and promotion of energy saving and emission reduction

Active Publication Date: 2015-10-28
SHENYANG XINBO IND TECH
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Problems solved by technology

[0003] Using a traditional roaster, during the roasting process, the attached water and crystallization water in aluminum hydroxide are converted into water vapor, together with the combustion flue gas after heat exchange, are directly discharged into the atmosphere as waste gas, which not only increases the production of roasting process The amount of waste gas increases the power consumption, and also causes a huge waste of water resources, which directly leads to the increase of alumina production cost

Method used

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  • System and method for recycling water vapor during roasting aluminum hydroxide
  • System and method for recycling water vapor during roasting aluminum hydroxide

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Embodiment Construction

[0028] Below the embodiments of the present invention are combined with the attached figure 1 Described in detail, but the protection scope of the present invention is not limited by the examples.

[0029] Such as figure 1 As shown, the system for recovering water vapor by roasting aluminum hydroxide in this embodiment includes a water vapor recovery device 1, a main furnace 2, a suspension separation heat exchanger 3 and a heat exchange device 4;

[0030] The feed port of the steam recovery device 1 is communicated with the aluminum hydroxide feeding device, the discharge port of the steam recovery device 1 is connected with the feed port of the main furnace 2, and the discharge port of the main furnace 2 is separated from the suspension The feed port of the heat exchanger 3 is connected, the powder outlet of the suspension separation heat exchanger 3 is the discharge port, the gas outlet is connected with the air inlet of the heat exchange device 4, and the gas outlet of t...

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Abstract

The invention belongs to the technical field of aluminum hydroxide production, and particularly relates to a system and method for recycling water vapor during roasting aluminum hydroxide. The system for realizing the aim of recycling the water vapor during roasting the aluminum hydroxide of the invention comprises a water vapor recycling device, a main furnace, a suspension separation heat exchanger and a heat transfer device. The system provided by the invention recycles crystal water and attached water produced during the roasting process of the aluminum hydroxide for reusing, so that the consumption of electric energy and heat energy during the roasting process is reduced, the energy conservation and emission reduction are promoted, and the economic benefits of enterprises are increased.

Description

technical field [0001] The invention belongs to the technical field of alumina production, in particular to a system and method for recovering water vapor by roasting aluminum hydroxide. Background technique [0002] According to statistics, my country's alumina output reached 47.77 million tons in 2014, ranking first in the world. Calculated on the basis of 6%~10% (mass ratio) of attached water in aluminum hydroxide, 0.629~0.703 tons of water will be discharged for every ton of alumina produced, and as much as 33 million tons of water will be discharged in 2014 alone. [0003] Using a traditional roaster, during the roasting process, the attached water and crystallization water in aluminum hydroxide are converted into water vapor, together with the combustion flue gas after heat exchange, are directly discharged into the atmosphere as waste gas, which not only increases the production of roasting process The amount of exhaust gas increases the power consumption, and al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/44
Inventor 王新军马平刘鹤群郭建强
Owner SHENYANG XINBO IND TECH
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