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Phosphorus thiochloride production waste water emission reduction and purification treatment method

A technology for the production of wastewater and phosphorus trichloride, applied in the direction of gaseous effluent wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems affecting the removal effect of pollution factors, the impact of microbial toxicity, and the increase in treatment costs. Achieve significant environmental benefits, good promotional value, and convenient operation

Inactive Publication Date: 2016-10-12
荆州沙隆达控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is almost no carbon-containing organic matter in the above wastewater, mainly containing S 2- 、PSO 3 3- 、PO 3 3- 、Al 3+ ionic inorganic substances, so the biochemical treatment not only has little effect, but also has a certain toxic effect on the microorganisms in the biochemical treatment. At the same time, after the wastewater is diluted by other organic wastewater, it will not only affect the removal effect of pollution factors, but also reduce the treatment cost. will greatly increase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Get 70g acidic reaction kettle washing water and 630g reaction kettle tail gas alkali absorption water and mix by mass ratio 1:9, filter and remove a small amount of solid residue, obtain 698.5g production waste water (wherein, the mass concentration of the phosphorus contained in the production waste water is 5511mg / l, Al 3+ The mass concentration of ions is 3800mg / l, S 2- The mass concentration of ions is 3690 mg / l), and 28 g of oxidant chlorine gas is added to the production wastewater at normal temperature to carry out oxidation reaction, and the pH value of the oxidation reaction of the control system is 4 to 5. After reacting for 0.5 h, filter to obtain white solid and colorless production wastewater filtrate (Wherein, the mass concentration of phosphorus contained in the production wastewater filtrate is 662mg / l, Al 3+ The mass concentration of ions is 0.85mg / l, no S 2- ion), get 200.23g colorless production waste water filtrate, add dephosphorization agent 2g ...

Embodiment 2

[0021] Get 70g acidic reaction kettle washing water and 630g reaction kettle tail gas alkali absorption water and mix by mass ratio 1:9, filter and remove a small amount of solid residue, obtain 698.5g production waste water (wherein, the mass concentration of the phosphorus contained in the production waste water is 5511mg / l, Al 3+ The mass concentration of ions is 3800mg / l, S 2- The mass concentration of ion is 3690mg / l), under normal temperature, add oxidant sodium hypochlorite 35g and carry out oxidation reaction in production waste water, control system oxidation reaction pH value is 8~9, after reaction 1h, filter and obtain white solid and colorless production waste water filtrate ( Among them, the mass concentration of phosphorus contained in the production wastewater filtrate is 560ppm, Al 3+ The mass concentration of ions is 0.97mg / l, no S is detected 2- ion), get 200.23g colorless production wastewater filtrate, add 1.4g dephosphorization agent calcium oxide, react...

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Abstract

The invention provides a phosphorus thiochloride production waste water emission reduction and purification treatment method. The method is characterized in that phosphorus thiochloride storage tank absorption water is cyclically used as reaction kettle pot washing water and reaction kettle tail gas alkali absorption water; the reaction kettle pot washing water and the reaction kettle tail gas alkali absorption water are mixed to produce waste water; oxidizing agents are added into production waste water to perform oxidation reaction; filtration is performed to obtain production waste water filter liquid; a phosphorus removing agent is added into obtained production waste water filter liquid to perform deep dephosphorization; the obtained purification standard reaching production waste water is discharged. The method provided by the invention has the advantages that the technical flow process is simple; the speed is high; the operation is convenient; the cost is lower; the contaminant removal rate is high; therefore the method provided by the invention has good popularization values. The contaminants in the waste water can be effectively removed by the method; the treated waste water does not contain S<2-> ions; the mass concentration of the phosphorus, Al<3+> and COD is reduced; the water quality is clear and transparent; the national discharge standard is reached.

Description

technical field [0001] The invention relates to the technical field of industrial waste water treatment, in particular to a method for reducing discharge and purifying waste water produced by phosphorus trichloride. Background technique [0002] Phosphor trichloride is a colorless or light yellow oily liquid with a pungent odor and a strong irritating effect on the eyes, skin, mucous membranes and respiratory tract. [0003] Phosphor trichloride production wastewater mainly has three streams: phosphorus trichloride storage tank absorption water, reaction kettle washing water, reaction kettle tail gas alkali absorption water. Among them, the water absorbed by the storage tank of phosphorus trichloride was analyzed, because the S contained in it 2- 、PSO 3 3- 、PO 3 3- The ion mass concentration is very low, which can be recycled or used as water for washing the reactor and absorbing the tail gas of the reactor, so as to achieve the effect of reducing the discharge of waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/18C02F103/34
CPCC02F9/00C02F1/722C02F1/76C02F1/763C02F2101/105C02F2103/18C02F2103/34C02F2301/08
Inventor 刘安平殷宏薛光才胡红菊覃尼刘建华余志金杨槐
Owner 荆州沙隆达控股有限公司
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