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Synchronous dephosphorization and defluorination coupling device and synchronous dephosphorization and defluorination method

A technology of coupling device and mixing tank, applied in chemical instruments and methods, multi-stage water/sewage treatment, multi-stage water treatment, etc., can solve problems such as low concentration of activated sludge, vulnerable biochemical systems, and large consumption of chemicals , to achieve the effect of improving phosphorus removal efficiency and fluorine removal efficiency, reducing mud-water separation time, and saving drug consumption

Pending Publication Date: 2021-11-12
德州绿霸精细化工有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of pesticide production, a large amount of pesticide wastewater will be produced, of which the treatment rate of pesticide wastewater is less than 10%, and the treated wastewater only accounts for a few percent of the treated wastewater, which has caused great pollution to the environment and harm
However, due to the high concentration of most pesticide wastewater, the physical and chemical treatment process requires a large amount of chemicals, resulting in high operating costs; at the same time, the concentration of activated sludge in the conventional biochemical system is low, and the biological resistance is poor, and the biochemical system is vulnerable. Therefore, pesticide wastewater needs to be highly diluted before it can be introduced into the biochemical system for biochemical treatment, resulting in a waste of dilution water

Method used

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  • Synchronous dephosphorization and defluorination coupling device and synchronous dephosphorization and defluorination method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A simultaneous phosphorus and fluorine removal coupling device, such as figure 1 As shown, including sequential connections:

[0035] Secondary sedimentation tank: take the sedimented wastewater into the follow-up equipment;

[0036] Pipeline mixer: mixing wastewater with liquid caustic;

[0037] Mixing tank 1: Add polyferric sulfate to the wastewater after passing through the pipeline mixer, and stir and mix well;

[0038] Mixing tank 2: the water from mixing tank 1 enters mixing tank 2, add liquid alkali and stir evenly to control PH;

[0039] Mixing tank 3: The water from mixing tank 2 enters mixing tank 3, adding polyaluminum sulfate, stirring and mixing to control PH;

[0040] Mixing tank 4: The water from the mixing tank 3 enters the mixing tank 4, adding magnetic powder and stirring to mix the magnetic powder and phosphorus and fluorine removal sludge evenly;

[0041] Mixing tank 5: the water from mixing tank 4 enters mixing tank 5, add polyacrylamide, stir a...

Embodiment 2

[0045] A method for synchronous phosphorus and fluorine removal, comprising the following steps:

[0046] (1) After the wastewater comes out of the secondary sedimentation tank, it enters the mixing tank 1 through the pipeline mixer, and the head end of the pipeline mixer is added with liquid caustic soda, and the amount of liquid caustic soda is controlled by the pH meter of the mixing tank 1;

[0047] (2) Polyferric sulfate is added to the upper end of the mixing tank 1, fully stirred for reaction, and the lower end is connected to the mixing tank 2;

[0048] (3) Add liquid caustic soda to the bottom of the mixing tank 2, and the amount of liquid caustic soda is controlled by the pH meter of the mixing tank 3; fully stir and mix, and the overflow flows into the mixing tank 3;

[0049] (4) The mixing tank 3 adopts an inwardly extending structure, the mixed solution is mixed with the bottom of the polyaluminum sulfate, and evenly stirred and overflowed into the mixing tank 4; ...

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Abstract

The invention belongs to the technical field of deep treatment of pesticide wastewater, and relates to a synchronous dephosphorization and defluorination coupling device, in particular to a treatment method that biochemical wastewater enters an intensive dephosphorization and defluorination coupling device, and a medicament is added for coagulating sedimentation to remove phosphorus and fluorine, so that supernate reaches the standard and is discharged. Compared with a single dephosphorization and defluorination process, the synchronous dephosphorization and defluorination coupling device has the advantages of being small in occupied area, small in mud production amount, short in reaction time, capable of saving the dosage of drugs, reducing the cost and the like, and the device has a PH compensation function, so that the system operation is more stable. Meanwhile, the device is matched with a magnetic separation system to complete internal circulation of magnetic powder and shorten mud-water separation time, and the effluent index can reach the specified emission standard.

Description

technical field [0001] The invention belongs to the technical field of advanced treatment of pesticide wastewater, and relates to a synchronous phosphorus and fluoride removal coupling device and a method for synchronous phosphorus and fluorine removal. It is a treatment method to remove phosphorus and fluorine by precipitation and make the supernatant discharge up to the standard. Background technique [0002] Pesticides have played a vital role in agricultural production and strongly promoted the development of modern agriculture. In recent years, the pesticide industry has developed rapidly. Through pesticide control, a large amount of food loss can be saved every year. However, in the process of pesticide production, a large amount of pesticide wastewater will be produced, of which the treatment rate of pesticide wastewater is less than 10%, and the treated wastewater only accounts for a few percent of the treated wastewater, which has caused great pollution to the env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F101/10C02F101/12
CPCC02F9/00C02F1/66C02F1/583C02F1/58C02F1/5245C02F1/56C02F1/488C02F2101/105C02F2101/12C02F2209/06C02F2301/08
Inventor 孙在臣赵岩陈月楼王伟杰马天彬陈永强
Owner 德州绿霸精细化工有限公司