Method for reducing temperature of baked aluminum oxide by boiler desalted water

An alumina and brine technology, applied in the field of boiler demineralization, roasting alumina to cool down, can solve the problems of not being used, low demineralized water temperature, waste of electricity, manpower, etc., and achieve the effect of reducing steam consumption and significant economic benefits.

Inactive Publication Date: 2010-01-13
GUANGXI HUAYIN ALUMINUM
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the low temperature of the newly prepared desalinated water, steam heating is required, which increases the production cost. At the same time, a large amount of waste heat from the roasted alumina is taken away by the circulating cooling water, which is not utilized, and wastes electricity and manpower.

Method used

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  • Method for reducing temperature of baked aluminum oxide by boiler desalted water
  • Method for reducing temperature of baked aluminum oxide by boiler desalted water
  • Method for reducing temperature of baked aluminum oxide by boiler desalted water

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Embodiment Construction

[0021] like image 3 "Schematic Diagram of Transformation Scheme Using Calcined Fluidized Bed to Heat Desalted Water".

[0022] ① The original desalinated water supply process (dotted line in the figure) is retained, and a DN250 pipeline is led from the desalinated water main pipe 3 to each fluidized bed 9-1, 9-2, 9-3, 9 of the alumina roasting furnace -4 In the cooler process, a valve 4-1 and an orifice flowmeter 5 are installed near the connection point.

[0023] ② After the desalted water comes out of the fluidized bed, it is merged into the desalted water main pipe through a DN250 pipeline, and then enters the low-pressure deaerators 16-1, 16-2, and 16-3.

[0024] ③ Install a DN25 drain valve 6 and 12 at the lowest point of the desalted water inlet and outlet pipes as the sewage outlet.

[0025] ④Our company has 3 roasting furnaces, each of which has 2 fluidized beds, and each fluidized bed has 4 coolers connected in series, and the area of ​​each cooler is 50.62m 2 . F...

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Abstract

The invention provides a method for reducing temperature of baked aluminum oxide by boiler desalted water, comprising the following steps: before entering a low pressure deaerator, the boiler desalted water enters a cooler of a baking furnace fluidized bed firstly by passing through a pipeline to reduce temperature of baked aluminum oxide, replacing circulation cooling water; and after heat exchange, the desalted water is merged into an original boiler desalted water flow by passing through the pipeline again after going out from the fluidized bed, and enters the low pressure deaerator for a second time. The invention fully utilizes waste heat of the baked aluminum oxide to heat the boiler desalted water, and reduces the steam consumption for heating the desalted water; and meanwhile, circulating water baking equipment stops running, therefore, the consumption of manpower, electric power, spare parts and the like is reduced so that the invention has remarkable economic benefit.

Description

technical field [0001] The invention relates to a method for producing alumina, in particular to a method for reducing the temperature of calcined alumina by using waste heat from roasting alumina to heat boiler desalted water to achieve the purpose of saving energy and reducing consumption. Background technique [0002] The desalinated water from the boiler goes to the low-pressure deaerator, where it is heated by steam for deaeration, and then enters the high-pressure deaerator for heating and deaeration, which is used by the boiler. [0003] The demineralized water before entering the low-pressure deaerator belongs to normal temperature water (about 25°C), and is heated to 98°C-104°C by steam in the low-pressure deaerator. [0004] Due to the low temperature of the freshly prepared desalinated water, it needs to be heated by steam, which increases the production cost. At the same time, a large amount of waste heat from calcined alumina is taken away by the circulating coo...

Claims

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Application Information

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IPC IPC(8): C02F1/02C01F7/02C02F1/20
Inventor 甘国耀刘孟端赵锡进张观玉张凤权文祖坚甘霖黄万峰雷超艺冯志刚韦孜张庚民蒋锐程好德黄喜进
Owner GUANGXI HUAYIN ALUMINUM
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