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Device and method for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production

A waste heat recovery and alumina technology, which is applied in cleaning heat transfer devices, alumina/aluminum hydroxide, chemical industry, etc., can solve problems such as affecting waste heat recovery and utilization efficiency, scaling of waste heat recovery devices, and scrapping of waste heat recovery devices. , to achieve the effect of light weight, saving floor space and saving space

Active Publication Date: 2013-10-09
SHANDONG HUACHUANG ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of waste steam discharge in the alumina production process, a large amount of heat energy is wasted
In the waste heat recovery and utilization of alumina waste steam waste heat medium, it will cause fouling of the waste heat recovery device, which directly affects the recovery and utilization efficiency of waste heat. Severe fouling will cause the waste heat recovery device to be scrapped
This part of waste steam contains a variety of harmful substances, which seriously pollute the environment.

Method used

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  • Device and method for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production
  • Device and method for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production
  • Device and method for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings and the example of red mud water in the alumina production process heated by waste heat of high-temperature steam evacuated during high-pressure leaching of recovered alumina.

[0052] Such as Figure 1-Figure 4As shown, the present invention includes a metal cylinder 1, the metal cylinder 1 is separated by a metal partition 8 in the middle, the low temperature medium chamber 11 is above the partition 8, and the high temperature medium chamber 10 is below the partition 8, and The low-temperature medium chamber 11 and the high-temperature medium chamber 10 are provided with heat pipes 3 penetrating through the partition 8, and each of the heat pipes 3 works independently.

[0053] A water inlet 4 is provided on the outer wall of the low-temperature medium chamber 11 , and an air inlet 6 is provided on the outer wall of the high-temperature medium chamber 10 .

[0054] A w...

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Abstract

The invention discloses a device and method for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production. The device comprises a metal cylinder body. The inner side of the metal cylinder body is vertically separated through a metal separating board in the radial direction. The portion above the separating board is a low-temperature medium chamber and the portion below the separating board is a high-temperature medium chamber. Heat pipes penetrating through the separating board are arranged in the low-temperature medium chamber and the high-temperature medium chamber. Each heat pipe can work independently. According to the working condition operation conditions of a project, a heat-exchange device contaminant removing device is used for removing contaminants at regular intervals. The heat-exchange device contaminant removing device is tightly combined with the device for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production. A complementation technology is adopted so that the contaminants generated by media prone to scaling can be cleaned. The difficult problem of scaling is solved and meanwhile, efficient operation of the device for exhaust steam waste heat recovery and pollution abatement in aluminum oxide production in a waste heat recovery and pollution abatement project is guaranteed.

Description

technical field [0001] The invention relates to a device and method for recovering waste steam waste heat and controlling pollution in alumina production. Background technique [0002] The waste steam discharged to the air during the high-low pressure dissolution process of alumina contains a relatively high calorific value. Due to the large amount of waste steam discharge in the alumina production process, a large amount of heat energy is wasted. In the waste heat recovery and utilization of alumina waste steam waste heat medium, it will cause fouling of the waste heat recovery device, which directly affects the recovery and utilization efficiency of waste heat. Severe fouling will cause the waste heat recovery device to be scrapped. This part of waste steam contains a variety of harmful substances, which seriously pollute the environment. [0003] For this reason, a special descaling design is carried out for the waste heat recovery and utilization device, so that it can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/02F28F9/24F28G1/08C01F7/02
CPCY02P20/10Y02P20/129
Inventor 王远飞马振北孙兴华
Owner SHANDONG HUACHUANG ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH CO LTD
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