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Processing method of waste water in phosphorus chemical industry

A treatment method and technology for wastewater treatment, applied in water/sewage treatment, chemical instruments and methods, neutralized water/sewage treatment, etc. The effect of simplicity, low processing costs, reduced investment and operating costs

Active Publication Date: 2012-01-25
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can achieve ideal results in the treatment of inorganic phosphorus chemical wastewater, there are problems such as high treatment costs, long process flow, and the need to adjust the pH value.

Method used

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  • Processing method of waste water in phosphorus chemical industry

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Phosphorus chemical wastewater 4m 3 With acid waste water 1m 3 , mix in the pipeline and enter the neutralization tank; add 145kg of calcium carbide slurry to adjust the pH of the liquid phase of the mixed system to 8.5, and mature for 30 minutes under this pH condition; the mature material is left to settle for 30 minutes, and the supernatant is passed through the sand After the filter device reaches the standard, it is discharged or reused. After the solid-liquid separation of the thick slurry in the lower layer, the filtrate returns to sedimentation, and the filter cake is stacked for disposal.

Embodiment 2

[0048] Phosphorus chemical wastewater 2m 3 With acid waste water 1m 3 , after mixing in the pipeline, enter the neutralization tank; add 126kg of calcium carbide slurry to adjust the pH of the mixed system to 9.0, and then stabilize and mature it for 60 minutes; after the adjusted pH slurry is left to settle for 60 minutes, the supernatant is filtered through sand After the device reaches the standard, it is discharged or reused. After the solid-liquid separation of the thick slurry in the lower layer, the filtrate returns to sedimentation, and the filter cake is stacked for disposal.

Embodiment 3

[0050] Phosphorus chemical wastewater 2m 3 With acid waste water 2m 3 , enter the neutralization tank after mixing in the pipeline; add 232kg of calcium carbide slurry to adjust the pH of the mixing system to 8.0, and stabilize it for 45 minutes. Let the PH-adjusted slurry settle for 45 minutes, the supernatant liquid passes through the sand filter device and is discharged or reused after reaching the standard.

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Abstract

The invention provides a processing method of waste water in phosphorus chemical industry, which comprises the following steps: mixing acidic waste water in titanium white industry by a sulfuric acid method with waste water in phosphorus chemical industry; neutralizing the mixed solution with lime milk or carbide slag slurry; and settling the reaction system, and filtering the residues. The technique is simple; after treatment, the liquid and solid in the reaction system can be easily separated, and the treated waste water reaches the emission standard without regulating the pH value, thereby implementing further combination of phosphorus chemical industry and titanium chemical industry and reducing the equipment investment. The invention has the advantage of low treatment cost, and has good social benefit and economic benefit.

Description

technical field [0001] The invention relates to a method for treating waste water in phosphorus chemical industry, in particular to a method for treating waste water produced in the production process of inorganic phosphorus chemical industry. Background technique [0002] Inorganic phosphorus chemical industry is one of the basic raw materials for the development of my country's national economy, and has a production history of more than 100 years in China. At present, in the production of inorganic phosphorus chemical industry in my country, most of them use yellow phosphorus as raw material, and a small amount of them use wet-process phosphoric acid as raw material. Both thermal and wet production of phosphate have a certain impact on the environment during the production process. At present, the inorganic phosphorus chemical industry implements the national comprehensive emission standard GB8978-1996. For general inorganic phosphorus chemical enterprises, the cost of d...

Claims

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Application Information

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IPC IPC(8): C02F1/66
CPCC02F1/58C02F2101/105C02F1/66C02F1/52
Inventor 文军李伟朱全芳邓伯松田友洪张杰
Owner SICHUAN LOMON TITANIUM IND CO LTD