Comprehensive treatment and resource utilization method for industrial organic phosphorus waste liquid

A comprehensive treatment and organic phosphorus technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of secondary pollution, difficult to achieve standard discharge, etc., to reduce environmental pressure , The effect of reducing the generation of three wastes

Active Publication Date: 2014-08-06
JIANGSU YOUTH CHEM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The amines produced during this decomposition process mostly produce nitrogen oxides during the incineration process, which is difficult to achieve discharge standards, which may cause secondary pollution

Method used

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  • Comprehensive treatment and resource utilization method for industrial organic phosphorus waste liquid
  • Comprehensive treatment and resource utilization method for industrial organic phosphorus waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Mother liquor pretreatment:

[0044] Take the IDA route to synthesize diglyphosate waste liquid (containing 2.5% phosphorus and 1.1% nitrogen), and use a loaded activated carbon catalyst for catalytic wet oxidation, and detect the phosphate radicals in the oxidized waste liquid (calculated as orthophosphoric acid 7.88%, the same below ), the organic phosphorus conversion rate is 99.71%. Adjust the pH to 8.6, then concentrate through five-effect evaporation, and remove part of the separated sodium chloride solid at the same time. Obtain the concentrated solution containing 33.1% of phosphate, 2.31% of nitrate (calculated as nitric acid, the same below), 3.5% of chloride ion, and 16.5% of sodium ion.

[0045] Add a certain amount of ammonia to the concentrated solution after the above pretreatment to make the molar ratio of nitrate and ammonia reach 1 / 1, and then add solid sodium hydroxide to make the sodium ions and phosphate after deducting the sodium ions contained in...

Embodiment 2

[0048] Add a certain amount of ammonia to the concentrated solution after the pretreatment of the above-mentioned embodiment 1 to make the molar ratio of nitrate and ammonia reach 1 / 1, then add solid sodium hydroxide to make the sodium ion after deducting the sodium ion contained in the sodium chloride The molar ratio with phosphate reaches 2 / 1. Then the prepared concentrated mother liquor is atomized and sprayed into the fluidized bed drying and polycondensation device, the temperature in the fluidized bed is controlled at 350-500°C, and the average residence time is 25 minutes. The tail gas passes through the cyclone separator, waste heat boiler, and bag dust removal. Empty the device and so on. The fly ash collected by the cyclone separator and its bag filter is circulated to the fluidized bed drying polycondensation device. The solid was obtained at the bottom of the fluidized bed, and after analysis, the content of sodium pyrophosphate was 86.6%, sodium chloride was 11.2...

Embodiment 3

[0051] Add a certain amount of ammonia to the concentrated solution after the pretreatment of the above-mentioned embodiment 1 to make the molar ratio of nitrate and ammonia reach 1 / 1, then add an appropriate amount of phosphoric acid to make the sodium ion and phosphoric acid after deducting the sodium ion contained in sodium chloride The molar ratio of roots reaches 1.65 / 1. Then the prepared concentrated mother liquor is atomized and sprayed into the fluidized bed drying and polycondensation device, the temperature in the fluidized bed is controlled at 400-500°C, and the average residence time is 25 minutes. The tail gas passes through the cyclone separator, waste heat boiler, and bag dust removal. Empty the device and so on. The fly ash collected by the cyclone separator and its bag filter is circulated to the fluidized bed drying polycondensation device. The solid was obtained at the bottom of the fluidized bed. After analysis, the content of sodium polyphosphate was 88.2...

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Abstract

The invention discloses a comprehensive treatment and resource utilization method for an industrial organic phosphorus waste liquid. The technology includes firstly the industrial organic phosphorus waste liquid allows organic phosphorus to be oxidized into inorganic phosphorus by a catalytic wet oxidation method, then the inorganic phosphorus material is subjected to evaporation, concentration and desalination, small-molecule organic matters generated from oxidation are removed, the material after concentration is subjected to high temperature treatment, and a solid product is recycled. Through the method of the invention, the waste liquid can be avoided from being directly subjected to a high temperature contact oxidation process to possibly generate nitrogen oxides, dioxin, smoke dust and other air pollution factors difficult to deal with, and secondary pollution cannot be generated. The waste liquid after treatment is appropriately blended to be transformed into pyrophosphate, polyphosphate, metaphosphate, orthophosphate and other substances according to needs, so that recycling and reutilization of phosphorus is achieved.

Description

technical field [0001] The invention relates to an industrial wastewater treatment method, in particular to a comprehensive treatment and resource utilization method for industrial organic phosphorus waste liquid. Background technique [0002] Phosphorus resources are becoming more and more precious, and the world's phosphorus reserves are only enough for human use for several decades. The lack of phosphorus will lead to the crisis of human existence. Therefore, the value of phosphorus will be much higher than that of rare earths and another important element potassium. On the other hand, in the industrial production process, a large amount of organophosphorus waste liquid is difficult to handle, which poses a serious threat to the environment. Therefore, the recycling of phosphorus resources in industrial organophosphorus phosphorus waste liquid not only has good economic efficiency, but also has positive social significance. [0003] At present, the phosphorus removal m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/72C02F1/74C02F1/66
CPCY02A50/20
Inventor 戚明珠王宝林杨建文孔勇吕杨杨凡蔡靖颜开开
Owner JIANGSU YOUTH CHEM
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