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Method and polishing line configuration for recovering compound fertilizers from polishing and cleaning wastewater in aluminum industry

A technology for cleaning waste water and compound fertilizer, applied in the field of aluminum material processing, can solve the problems of high energy consumption, high cost and high treatment cost in the three-acid evaporation process, saving energy consumption and environmental protection cost, and low waste liquid treatment cost , The effect of reducing the amount of waste liquid recycling

Active Publication Date: 2019-01-08
FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the evaporation process of trapped triacids produces a large amount of smoke, pollutes the environment, and costs a lot; the energy consumption of the triacidic evaporation process is huge, and the cost cannot be underestimated; the evaporation container corrodes too quickly and needs to be replaced every two years, which requires too much investment
In the actual operation of tri-acid recovery, there are problems such as large pollution, high energy consumption, low efficiency, and high cost.
This treatment method has high costs, a large amount of waste residue, and ammonia nitrogen emissions.
[0016] In modern aluminum processing enterprises, there is an urgent need to deal with polishing waste liquid, but the traditional method of mixing large amounts of cleaning water and then processing it is too simple, resulting in a large amount of phosphorus and nickel-containing waste residues, and the society pays expensive environmental protection costs for these waste residues. Urgently develop new technology to solve the environmental protection problem of polishing waste acid

Method used

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  • Method and polishing line configuration for recovering compound fertilizers from polishing and cleaning wastewater in aluminum industry
  • Method and polishing line configuration for recovering compound fertilizers from polishing and cleaning wastewater in aluminum industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] Embodiment 1 Recycling of aluminum phosphate and liquid N-P compound fertilizer.

[0136]Polishing waste water interception: aluminum alloy enters polishing tank 1 and polishes for 20s-120s, then trickles for 20s; aluminum alloy enters first non-flowing washing tank 2, cleans for 60s, drips for 30s, first flowing washing tank 2 is provided with cooling pipe 8, The production temperature of the first flowing water washing tank 2 is controlled at ≤ 50°C; after that, the aluminum alloy enters the second non-flowing water washing tank 3, cleans for 60 seconds, and drips for 30 seconds; then enters the high-pressure atomizing spray tank 4 and sprays for 30 seconds , the spray water flows into the storage tank 5; the retention of the polishing liquid waste water is completed; after the water level in the first flowing water washing tank 2 drops, it is supplemented by the water in the second non-flowing water washing tank 3; when the second non-flowing water washing tank 3 Aft...

Embodiment 2

[0139] Example 2 Liquid N-P compound fertilizer concentrates the crystallization separation liquid to generate N-P compound fertilizer.

[0140] Get embodiment 1 when the bath liquid density of the first non-flowing washing tank reaches 1.29-1.31g / cm 3 When collecting the bath liquid and stopping the dosing when the pH value reached 6.5-7.5, 1000g of liquid N-P compound fertilizer was obtained. Concentrate and crystallize, dry and grind to obtain 453g of N-P compound fertilizer containing ammonium sulfate-ammonium phosphate-ammonium nitrate. The solid content of the liquid N-P compound fertilizer is 45.3%, and the water content is 54.7%.

Embodiment 3

[0141] Example 3 Liquid N-P compound fertilizer is mixed with bagasse (water content≤10%) to produce granular organic-inorganic compound fertilizer.

[0142] Get embodiment 1 when the bath liquid density of the first non-flowing washing tank reaches 1.29-1.31g / cm 3 When collecting bath liquor and when the pH value reaches 6.5-7.5 and stops dosing, the obtained water content is 54.7% liquid N-P compound fertilizer 1000g, add dry and fresh distiller's grains 10g, gradually add dry powdery bagasse (moisture content ≤10%), until no water dripping, the dosage of bagasse (moisture content≤10%) is 250g, and the finished product is granular organic-inorganic compound fertilizer; in the retting factory area equipped with ventilation equipment, ferment for 60 days, and the compound fertilizer becomes black Black is the end point of ripening;

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Abstract

The invention discloses a polishing line configuration for recovering compound fertilizers from polishing and cleaning wastewater in the aluminum industry. According to the polishing line configuration, a high-pressure atomization and spray tank, a second immobile rinsing bath and a first immobile rinsing bath communicate in sequence and are used for holding back polishing solution from a polishing bath; the high-pressure atomization and spray tank is connected with a storage tank which is used for storing spray wastewater; the high-pressure atomization and spray tank communicates with the second immobile rinsing bath through the storage tank; the storage tank communicates with the second immobile rinsing bath through a pipeline; and a second pump is arranged on the pipeline. The inventionfurthermore discloses a method for recovering compound fertilizers through the polishing line device for recovering compound fertilizers from polishing and cleaning wastewater in the aluminum industry. According to the configuration and the method, the environmentally-friendly cost for treating phosphorus containing and ammonia-nitrogen wastewater can be greatly reduced and the discharge of nickel solid hazardous waste can be greatly reduced. By adoption of the high-pressure atomization and spray tank, the waste liquor recovery amount is decreased.

Description

technical field [0001] The invention relates to the technical field of aluminum material processing, in particular to a method for recycling compound fertilizer from polishing and cleaning wastewater in the aluminum industry and a polishing line configuration. Background technique [0002] Aluminum alloy has the advantages of excellent processing performance, good corrosion resistance, beautiful surface, high recovery rate, etc., and has been widely used in construction, transportation, machinery, electric power and other industries. In recent years, the trend of aluminum replacing copper, aluminum replacing wood, aluminum replacing steel, and expanding the scope of aluminum application has become more obvious. The aluminum processing industry is not only a traditional industry, but also a sunrise industry full of vitality. According to statistics, the per capita annual consumption of aluminum alloy in developed countries in Europe and the United States is more than 32kg, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/03C05F7/00C01B25/37C01B25/36
CPCC01B25/36C01B25/37C05F7/00C23F3/03Y02A40/20
Inventor 熊映明
Owner FOSHAN SANSHUI XIONGYING INNOVATION CENT FOR ALUMINUM SURFACE TECH
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