Steam waste heat recovery of dissolved and diluted slurry
A steam waste heat and diluent technology, applied in sustainable manufacturing/processing, climate sustainability, chemical industry, etc., can solve problems such as energy waste, achieve simple implementation, lower flue gas emission temperature, and promote continuous improvement of the environment Effect
Inactive Publication Date: 2013-03-27
GUANGXI HUAYIN ALUMINUM
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Problems solved by technology
[0002] In the production of alumina, the temperature of the steam in the dissolution dilution tank is about 130°C, and the flow rate is about 30t / h. During the production, the steam enters the water cooler to exchange heat with the production water, and only part of the heat can be recovered, and the rest is emptied and taken away. A lot of heat, resulting in a great waste of energy
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[0025] Use waste materials to make a self-made heat exchange device in the backup dilution tank for dissolution, and use the evaporation stock solution pump to send the evaporation stock solution to the heat exchange device in the backup dilution tank of the dissolution workshop to exchange heat with the exhaust steam and return to the evaporation stock solution tank.
[0026] As shown in the figure, the original liquid pump 4 is used to draw out part of the evaporated original liquid from the evaporation workshop, and the new evaporation original liquid feed pipe 5 enters the self-made heat exchanger 8 in the dilution tank through the spare dilution tank 7 to exchange heat. After the steam heat exchange and increase the temperature, the new evaporation raw liquid discharge pipe 6 is sent to the conical raw liquid distribution tank 3 through the spare dilution tank heat exchange, and finally returned to the evaporation raw liquid tank 1, 2 to mix with the decomposition mother liqui...
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The invention relates to a steam waste heat recovery method of dissolved and diluted slurry in production of aluminum oxide. The method is characterized by comprising the steps of pumping an evaporating original fluid by an evaporating original fluid pump to a heat exchanging device of a backup diluting tank of a dissolving workshop for heat exchange and temperature rise with dead steam and returning to an evaporating original fluid tank. According to the invention, steam heat energy is used adequately, so that energy conservation and emission reduction, cost decrease and benefit increase and economic benefit are promoted. Based on 2000 thousand aluminum oxide tons per year, about 13,840,000 yuan can be saved per year. Meanwhile, the discharge temperature of smoke is reduced, and the environment is continuously improved. The method is low in investment, simple to implement, can be applied to the same industry, and greater social and economic benefits can be obtained.
Description
Technical field [0001] The invention relates to a technology for recovering and utilizing the waste heat of the steam of the dissolved dilution slurry. Background technique [0002] In alumina production, the steam temperature of the slurry in the dissolution dilution tank is about 130°C and the flow rate is about 30t / h. During production, the steam enters the water cooler and exchanges heat with the production water. Only part of the heat can be recovered, and the remaining part is emptied and taken away. A large amount of heat causes a great waste of energy. In addition, the current decomposition mother liquor temperature is about 46°C. After the semen plate heat exchange, the average temperature of the evaporation stock solution tank is about 80°C. Steam needs to be consumed to heat it to evaporate the water in the evaporator and increase the concentration of caustic alkali. [0003] In order to achieve the purpose of energy saving and emission reduction, and the development of...
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CPCY02P20/10Y02P20/129
Inventor 甘国耀刘孟端赵锡进程好德张凤权陈中源黄喜进白永华张庚民王廷军李学军韦忠平罗春鸿廖好罗付洪
Owner GUANGXI HUAYIN ALUMINUM