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Dephosphorization reactor employing struvite crystallization process, and application thereof

A crystallization method and reactor technology, applied in chemical instruments and methods, water treatment parameter control, water / sludge / sewage treatment, etc. In order to achieve the effect of sufficient contact reaction, high reaction efficiency and product recovery efficiency, and improved reaction and product recovery efficiency

Inactive Publication Date: 2020-04-07
福建申远新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the detachable stainless steel wire fixed bed still has the risk of carrier fouling and clogging, resulting in high frequency of stainless steel wire replacement and heavy operation and maintenance workload

Method used

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  • Dephosphorization reactor employing struvite crystallization process, and application thereof
  • Dephosphorization reactor employing struvite crystallization process, and application thereof
  • Dephosphorization reactor employing struvite crystallization process, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Manufacturing struvite crystallization phosphorus removal reactor, its dimensions are as follows:

[0137] In the water inlet zone, the vertical distance between the bottom of the filter plate and the bottom of the reactor is 1540mm. The vertical distance between the water inlet and the bottom of the reactor is 1100mm, and the vertical distance between the differential pressure transmitter in the water inlet area and the bottom of the reactor is 1390mm.

[0138] In the reaction crystallization zone, the vertical distance between the sand outlet layer and the bottom of the reactor is 1640mm. The vertical distance between the mixing port layer and the sand discharge port layer is 300mm, and the vertical distance between the mixing port layer and the first observation port layer is 300mm. The vertical distance between the first viewing port layer and the second viewing port layer is 2750mm.

[0139] The reaction crystallization zone has a diameter of 3400mm and a height ...

Embodiment 2

[0144] The phosphorus-containing wastewater is mixed with magnesium salt and ammonium salt, and the pH value is adjusted to 5-6 to obtain a mixed solution, wherein the magnesium salt is selected from magnesium sulfate and magnesium chloride or mixed, and the ammonium salt is selected from ammonium sulfate, One or two kinds of ammonium chloride mixed, phosphorous wastewater, magnesium salt, ammonium salt according to PO 4 3- , Mg 2+ , NH 4 + The molar ratio of (1.5~2.5):(0.5~1.5):(1.5~2.5) was added. Put the mixed solution into the reactor, and flow into the reaction crystallization zone from the wastewater inlet through the pipeline through the wastewater inlet filter cap. At the same time, the circulating water flows from the circulating water inlet through the water inlet area into the reaction crystallization area through the circulating water inlet filter cap. The waste water inlet filter caps and the circulating water inlet filter caps are arranged at intervals on th...

Embodiment 3

[0148] Mix phosphorus-containing wastewater with magnesium salt and ammonium salt and adjust the pH value to 5.5 to obtain a mixed solution. Among them, the magnesium salt is magnesium sulfate, and the ammonium salt is ammonium sulfate. 4 3- , Mg 2+ , NH 4 + A molar ratio of 2.0:1.0:2.0 was added. Put the mixed solution into the reactor, and flow into the reaction crystallization zone from the wastewater inlet through the pipeline through the wastewater inlet filter cap. At the same time, the circulating water flows from the circulating water inlet through the water inlet area into the reaction crystallization area through the circulating water inlet filter cap. The wastewater inlet filter caps and circulating water inlet filter caps are arranged at intervals on the filter plate, and the ratio of the number of adjacent wastewater inlet filter caps to circulating water inlet filter caps is 1:4. The volume ratio of the mixed solution to the circulating water in the reaction...

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Abstract

The invention provides a dephosphorization reactor employing a struvite crystallization process. The dephosphorization reactor comprises a hollow cylinder body, wherein a water inlet area, a reactivecrystallization area, a clear water upwelling area and a water outlet area are sequentially arranged in the cylinder body along a water inflow direction; a filter plate is arranged between the water inlet area and the reactive crystallization area; at least one alkali liquor distributor is arranged in the reactive crystallization area; the upper part of the clear water upwelling area is provided with an effluent weir; the water outlet area is communicated with the clear water upwelling area through the effluent weir; the water inlet area is provided with a wastewater inlet and a circulating water inlet; the wastewater inlet is communicated with the reactive crystallization area through a pipeline via the filter plate; and the water outlet area is provided with a water outlet. The inventionfurther provides an application method of the dephosphorization reactor employing the struvite crystallization process. According to the dephosphorization reactor employing the struvite crystallization process and the application thereof provided by the invention, the dephosphorization reactor has the characteristics that a carrier is not prone to scaling, mass transfer efficiency is high, reaction efficiency is high, blockage hardly occurs, and the recovery rate of a product is high, and can be applied to the treatment of high-concentration nitrogen-phosphorus wastewater and the recovery ofphosphorus.

Description

technical field [0001] The invention belongs to the technical field of treatment and recycling of high-concentration nitrogen and phosphorus wastewater, and relates to a struvite crystallization reactor for phosphorus removal and an application thereof. Background technique [0002] Sources of phosphorus in water include natural sources and man-made sources, of which man-made sources are the main sources, mainly including excrement, washing products, fertilizers, pesticides, and certain industrial wastewater. Almost all domestic sewage and some industrial wastewater have high phosphorus content. At present, biological and chemical methods are usually used for phosphorus removal. Existing operating experience shows that the amount of phosphorus removed by biological phosphorus removal is generally about 3.5-4.5% of BOD (sludge age 5-20 days), and it is difficult to meet increasingly stringent discharge standards only by biological phosphorus removal . Therefore, chemical m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10
CPCC02F9/00C02F1/66C02F1/001C02F1/52C02F2101/105C02F2209/06C02F2209/02
Inventor 潘德标谷俊王建华刘霞卢毅明阮燕霞
Owner 福建申远新材料有限公司