Physicochemical treatment method for mixed type chemical fertilizer production wastewater
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A technology for producing wastewater and treatment methods, applied in natural water treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of ineffective treatment of mixed wastewater, complex process and high cost
Active Publication Date: 2016-04-20
HUBEI YIHUA GRP CO LTD +2
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Abstract
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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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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 prepared concentration of PAC is 10-15%, the prepared concentration of PAM is 0.1-0.5%, and the prepared 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, 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 blowe...
Embodiment 2
[0042] Physicochemical treatment scheme of mixed waste water of the present invention
[0043] get ready to drive
[0044] Check all equipment and whether the pipeline is intact and unblocked.
[0045] Check all valves and whether the instruments are flexible and easy to use.
[0046] The spare pumps of each operating agency have been completed and ready for work.
[0047] The prepared concentration of PAC is 10-15%, the prepared concentration of PAM is 0.1-0.5%, and the prepared concentration of calcium carbide slurry is 8-10%.
[0048] Contact the dispatcher and notify the ammonium phosphate post to send sewage; notify the acetylene post to send PVC carbide slurry.
[0049] Inject waste water into the regulating tank, 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 ...
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Abstract
The invention provides a physicochemical treatment method for mixed type chemical fertilizer production wastewater. The method comprises specific steps as follows: ammonium phosphate reaction tail washing wastewater, sodium silicofluoride wastewater, concentrated geosyncline wastewater and tailing backwater are added to a sewage physical-chemical regulation pool, carbide-slag slurry enters a lime slurry pool, acetylene alkali waste, catalyst pumping agent wastewater and alkali evaporation wastewater enters a mixed reaction pool, acid wastewater entering the regulation pool and the carbide-slag slurry entering the lime slurry pool are conveyed to the mixed reaction pool through a pump, and a PAC (polyaluminium chloride) and PAM (polyacrylamide) mixed liquid is added; the mixed liquid is conveyed to a primary flocculation reaction pool through the pump and is stirred to have the neutralization and sedimentation reaction, a formed precipitate mixed liquid is subjected to sedimentation through a sedimentation tank I, a supernatant liquid enters a secondary flocculation reaction pool, the PAC and PAM mixed liquid is added again, pH value is regulated, the mixture has the neutralization and sedimentation reaction, a product enters a sedimentation tank II after reaction, and water treated by the secondary flocculation reaction pool can be used. The wastewater after treatment is recycled to a circulating water system of a factory, the recycling rate is higher than 90%, and the environmental and economic benefits are remarkable.
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] Ca 2+ +2F - →CaF 2 ↓ [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. [0...
Claims
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Application Information
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