Circular treatment method and process system for fluorine-containing high-ammonia-nitrogen industrial wastewater

A technology for industrial wastewater and recycling treatment, applied in multi-stage water treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of poor continuity, lack, high cost of chemical dosing, etc., to achieve uniform heating and low investment And the effect of low operating cost and shortened pyrolysis time

Inactive Publication Date: 2019-01-22
国能朗新明环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of comprehensive treatment technology for fluorine-containing ammonia nitrogen wastewater is still lacking, and the cost of chemical dosing in the removal process is high and the continuity is poor

Method used

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  • Circular treatment method and process system for fluorine-containing high-ammonia-nitrogen industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First place the 1 m 3 The concentration of ammonia nitrogen is 500 mg / L, F - Wastewater with a concentration of 250 mg / L is added to the raw water adjustment tank, and then the pH is adjusted to 8, and then the wastewater in the adjustment tank is introduced into the mechanical acceleration clarifier tank, according to Ca 2+ :F - :Mg 2+ :NH 4 + =5:1:2.5:2 Add medicament and mechanically stir for 90 minutes, the separated clear water rises upwards and flows out through the sump, and the sinking solid-liquid mixture is transferred to the box-type microwave reactor through the pump. After the pumped solid-liquid mixture is placed in the fluidized microwave reactor, the molar ratio of NH 4 + :OH - =1:1 After adding soda ash and stirring and mixing, turn on the microwave reactor, set the power to 0.4 KW, microwave radiation for 10 min, and the ammonia gas generated by the drying and decomposition of the mixture is passed into the acid solution through the air duct at ...

Embodiment 2

[0021] First place the 1 m 3 The concentration of ammonia nitrogen is 500 mg / L, F - Wastewater with a concentration of 250 mg / L is added to the raw water adjustment tank, and then the pH is adjusted to 10, and then the wastewater in the adjustment tank is introduced into the mechanical acceleration clarifier tank, according to Ca 2+ :F - :Mg 2+ :NH 4 + =5.5:1:2.5:2 Add medicament and mechanically stir for 90 minutes to react. The separated clear water rises upwards and flows out through the sump. The sinking solid-liquid mixture is transferred to the box-type microwave reactor through the pump. After the pumped solid-liquid mixture is placed in the fluidized microwave reactor, the molar ratio of NH 4 + :OH - =1:1 Add soda ash and stir to mix, then turn on the microwave reactor, set the power to 0.4 KW, irradiate with microwave for 10 minutes, and the ammonia gas produced by the drying and decomposition of the mixture is passed into the acid solution through the air duct...

Embodiment 3

[0023] First place the 1 m 3 The concentration of ammonia nitrogen is 500 mg / L, F - Wastewater with a concentration of 250 mg / L is added to the raw water adjustment tank, and then the pH is adjusted to 8, and then the wastewater in the adjustment tank is introduced into the mechanical acceleration clarifier tank, according to Ca 2+ :F - :NH 4 + =5.5:1: 2 Add chemicals and stir, and at the same time introduce wet flue gas magnesium desulfurization wastewater from thermal power plants (Mg 2+ The concentration is 6532 mg / L) about 100 L, mechanically stirred for 90 minutes, the separated clear water rises upwards, flows out through the sump, and the sinking solid-liquid mixture is transferred to the box-type microwave reactor through the pump. After the pumped solid-liquid mixture is placed in the fluidized microwave reactor, the molar ratio of NH 4 + :OH - =1:1 Add soda ash and stir to mix, then turn on the microwave reactor, set the power to 0.4 KW, microwave radiation fo...

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Abstract

The invention provides a new circular treatment method for simultaneously removing fluorinions and ammonia from fluorine-containing high-ammonia-nitrogen industrial wastewater. The fluorine removing agent provides a phosphorus source for precipitation and ammonia removal simultaneously, the type of agent addition is reduced, and the concentration of residual phosphorus in effluent is reduced. Magnesium-process desulfurized wastewater in thermal power plants or old brine after potassium extraction in salt lakes can be used as a magnesium source instead of conventional magnesium salt reagents, waste is treated by waste, other industrial wastewater is recycled in an ammonia removal process, and the sustainable development circular economy treatment technology is achieved. At the same time, provided is a circular treatment system for the fluorine-containing high-ammonia-nitrogen industrial wastewater. Microwave radiation replaces a traditional heating process, the heating rate is fast, theheating is uniform, the pyrolysis time of struvite is greatly shortened, and the ammonia gas concentration obtained by decomposition is high. After acid recovery, a high-concentration ammonia salt solution can be obtained. The investment and operation cost of the whole set of circular treatment system for the fluorine-containing high-ammonia-nitrogen industrial wastewater is low. The concentration of fluorinions and ammonia nitrogen in the treated effluent is stable, the removal rate of the fluorinions can reach 98%, and the removal rate of ammonia nitrogen can reach 97% or more.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment and environmental protection, in particular to a method and process system for circulating fluorine-containing and high-ammonia-nitrogen industrial wastewater. At the same time, flocculation and precipitation of fluoride ions and struvite are carried out and recycled after microwave pyrolysis to realize fluorine-containing and high-ammonia nitrogen. Resource recycling treatment of industrial wastewater. Background technique [0002] At present, my country's economy is developing rapidly, and at the same time, with the huge consumption of energy, environmental problems are becoming more and more serious. In order to improve the current environmental situation, the state has become more and more strict on the management of "three wastes". The main source of fluorine pollution in the water environment is the fluorine-containing "three wastes" discharged from industrial produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C01B25/45C02F101/14C02F101/16
CPCC01B25/451C02F1/583C02F1/586C02F1/66C02F9/00C02F2001/007C02F2101/14C02F2101/16C02F2301/08
Inventor 陆梦楠赵焰苏双青陈雪陈文婷孙斌徐志清腾东玉杨东
Owner 国能朗新明环保科技有限公司
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