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A physical and chemical treatment method for mixed fertilizer production wastewater

A technology for the production of wastewater and treatment methods, which is applied in natural water treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., and can solve the problems of ineffective treatment of mixed wastewater, high cost, and complicated process

Active Publication Date: 2018-06-05
HUBEI YIHUA GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Due to the problems of complex process and high cost, the above-mentioned processes cannot effectively treat mixed wastewater.

Method used

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  • A physical and chemical treatment method for mixed fertilizer production wastewater
  • A physical and chemical treatment method for mixed fertilizer production wastewater
  • A physical and chemical treatment method for mixed fertilizer production wastewater

Examples

Experimental program
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Embodiment 1

[0024] Original Physicochemical Treatment Scheme for Mixed Wastewater

[0025] get ready to drive

[0026] Check all equipment and whether the pipeline is intact and unblocked.

[0027] Check all valves and whether the instruments are flexible and easy to use.

[0028] The spare pumps of each operating agency have been completed and ready for work.

[0029] The concentration of PAC is 10-15%, the concentration of PAM is 0.1-0.5%, and the concentration of calcium carbide slurry is 8-10%.

[0030] Contact the dispatcher and notify the ammonium phosphate post to send sewage; notify the acetylene post to send PVC carbide slurry.

[0031] Inject waste water into the regulating tank, and when the liquid level reaches 30%, take a sample to analyze the water quality F - ≤1000mg / L, PO 4 3- ≤300mg / L, it is qualified water quality. Start the P101 corrosion-resistant self-priming pump to drive the sewage into the pipeline mixer, and start the K101 Roots blower at the same time.

...

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Abstract

The invention provides a method for physical and chemical treatment of mixed fertilizer production wastewater. Specifically, ammonium phosphate reaction tailing wastewater, sodium fluorosilicate wastewater, concentrated pit wastewater and tailings backwater are added to a sewage physical and chemical adjustment pool, and calcium carbide slag is fed into lime Emulsion tank, acetylene waste alkali, catalyst wastewater and alkali evaporation wastewater are sent to the mixing reaction tank, the acid wastewater entering the adjustment tank and the calcium carbide slurry entering the lime emulsion tank are transported to the mixing reaction tank through pumps, and PAC and PAM mixed liquid are added; The mixed solution is pumped to the primary flocculation reaction tank, stirred, and the precipitation reaction is neutralized. After the formed sediment mixture is fully settled in the sedimentation tank I, the supernatant enters the secondary flocculation reaction tank, and then PAC and PAM mixed solution are added. , adjust the pH value, and neutralize the precipitation reaction. After the reaction is completed, it enters the sedimentation tank, and the water treated by the secondary flocculation reaction tank is available for use. This type of wastewater is reused in the circulating water system of the factory area after treatment, with a reuse rate of over 90%, with significant environmental and economic benefits.

Description

technical field [0001] The invention relates to a physical-chemical treatment method for mixed fertilizer production wastewater. Specifically, the physical-chemical treatment method is adopted, wherein the mixed wastewater includes ammonium phosphate reaction tail washing wastewater, sodium fluorosilicate wastewater, concentrated pit wastewater and tailings return water, PVC conversion, acetylene waste alkali, catalyst wastewater (involving heavy metals) and alkali evaporation wastewater. Background technique [0002] At present, the principles of sewage treatment in the mixing reaction tank mainly include the following: [0003] [0004] Phosphate radicals in ammonium phosphate acidic water react with calcium ions in carbide slurry to form calcium phosphate precipitates. [0005] [0006] The fluoride ions in the ammonium phosphate acidic water react with the calcium ions in the calcium carbide slurry to form calcium fluoride precipitates. [0007] h + + OH - = ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F103/34
CPCC02F1/52C02F1/66C02F9/00C02F2103/34
Inventor 蒋远华杨晓勤周少奇冯加新黄河郭锐董玉梅高斌方娅兰魏旺玲
Owner HUBEI YIHUA GRP CO LTD
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