Treatment device and treatment method for recycling ardealite leachate

A treatment device and a technology for leachate, applied in the field of treatment devices for recycling phosphogypsum leachate, can solve the problems of low ammonia nitrogen removal rate, high cost, limitation, etc., and achieve the effect of simple device structure and convenient later enlargement

Pending Publication Date: 2021-07-16
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned treatment method has a good removal effect on phosphate, sulfate, fluoride, and heavy metal ions, but it has disadvantages such as high cost, large amount of generated sludge, and low removal rate of ammonia nitrogen, which limits its application in industrial scale phosphogypsum. Leachate Treatment Applications

Method used

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  • Treatment device and treatment method for recycling ardealite leachate
  • Treatment device and treatment method for recycling ardealite leachate
  • Treatment device and treatment method for recycling ardealite leachate

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Embodiment 1

[0084] 1) The pH of leachate wastewater from a phosphogypsum storage yard is 2.4, the content of ammonia nitrogen is 367 mg / L, the content of total phosphorus is 5103 mg / L, the content of magnesium ions is 1085 mg / L, the content of fluoride ions is 1760 mg / L, and the content of sulfate ions The content is 5980mg / L, and the calcium ion content is 189mg / L, which are collected in the sump. Flow 100m 3 / h, the leachate is adjusted to pH=3.3 through the lime dosing tank 1, and after 20 minutes of reaction, the supernatant enters the reaction tank of the next stage. At this time, ammonia nitrogen, total phosphorus, and Mg 2+ , F - , SO 4 2- , Ca 2+ The concentrations were 342mg / L, 4896mg / L, 964mg / L, 429mg / L, 3762mg / L, 368mg / L in sequence.

[0085] 2) Adjust the above supernatant to pH=6.4 through the lime dosing tank 1, continue to react for 20 minutes, and the supernatant enters the reaction pool of the next stage. At this time, ammonia nitrogen, total phosphorus, Mg 2+ , F ...

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Abstract

The invention belongs to the technical field of industrial sewage treatment, and relates to a treatment device and a treatment method for recycling ardealite leachate. The treatment device for recycling ardealite leachate comprises a water collecting tank, a self-control dosing system, a mixing and settling system, a clean water tank and a product discharge system. A water inlet communicated with the water collecting tank is formed in the water collecting tank; the water collecting tank is communicated with the clean water tank through the mixing and settling system; the clean water tank is connected into the mixing and settling system; a water outlet communicated with the clean water tank is formed in the clean water tank; and the self-control dosing system and the product discharge system are respectively communicated with the mixing and settling system. According to the treatment device and the treatment method for recycling ardealite leachate, N, P and F elements are separately precipitated and separated out, no solid waste is generated, and the purpose of resource recycling can be achieved.

Description

technical field [0001] The invention belongs to the technical field of industrial sewage treatment, and relates to a treatment device and a treatment method for resource recycling of phosphogypsum leachate, in particular to a resource suitable for the treatment of wastewater with high content of ammonia nitrogen, total phosphorus, fluoride and high acidity A treatment device and treatment method for chemically recovering phosphogypsum leachate. Background technique [0002] Phosphoric acid produced by decomposing phosphate rock with sulfuric acid, nitric acid or hydrochloric acid in industry is collectively called wet-process phosphoric acid, and decomposing phosphate rock with sulfuric acid is the most commonly used phosphoric acid preparation process. Sulfuric acid decomposes phosphate rock to generate phosphoric acid solution and insoluble calcium sulfate crystals, as shown in the reaction formula (1): [0003] Ca 5 F(PO 4 ) 3 +5H 2 SO 4 +5nH 2 O=3H 3 PO 4 +5CaSO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10C02F101/14C02F101/16C02F103/06
CPCC02F9/00C02F1/66C02F2001/007C02F1/56C02F2101/16C02F2103/06C02F2101/14C02F2101/105C02F2301/08
Inventor 周正陆亚超占伟杜冬云祝国亮
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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