Circulating fluidized crystallization control reaction device for wastewater phosphorus synergy crystallization and dynamic monitoring and regulating method thereof

A reaction device and a crystallization control technology, applied in the field of agricultural resources and environment, can solve the problems of limited crystallization efficiency, difficulty in monitoring the supersaturated state of struvite crystallization, and inability to effectively control the struvite crystallization granulation process, etc., so as to improve the efficiency. Effect

Active Publication Date: 2014-03-26
CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a circulating fluidized crystallization control reaction device for phosphorus synergistic crystallization of waste water and its dynamic monitoring and regulation method, which can effectively overcome struvite crystallization which is easily affected by waste water qual

Method used

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  • Circulating fluidized crystallization control reaction device for wastewater phosphorus synergy crystallization and dynamic monitoring and regulating method thereof

Examples

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Embodiment 1

[0049] Example 1, Circulating Fluidized Crystallization Control Reactor for Wastewater Phosphorus Synergistic Crystallization

[0050]Such as figure 1 As shown, the circulating fluidized crystallization control reaction device of the wastewater phosphorus synergistic crystallization of the present invention includes a crystallization controller 1, a bag filter 2, a saturated liquid buffer tank 3 and a dynamic monitoring tank 4; wherein, from top to bottom, The crystallization regulator 1 includes a crystal growth tank 5 and a crystal collection tank 6, and an overflow weir 7 is connected to the top opening of the crystal growth tank 5, and the overflow weir 7 has an equilateral triangle structure with inner and outer double layers. The mud discharge pipe of the crystal collection tank 6 communicates with the bag filter 2; the liquid outlet of the bag filter 2 communicates with the saturated liquid buffer tank 3. The solid outlet of the saturated liquid buffer tank 3 is connec...

Embodiment 2

[0053] Example 2. Dynamic monitoring and regulation of phosphorous synergistic crystallization in wastewater

[0054] Utilize the circulating fluidized crystallization control reaction device of wastewater phosphorus synergistic crystallization in embodiment 1 to carry out dynamic monitoring and regulation, wherein, the height-diameter ratio of the crystal growth tank 5 of crystallization regulator 1 in the reaction device is 4:1, The height-to-diameter ratio of the crystal collection tank is 1:1, the height-to-diameter ratio of the bag filter 2 is 1:1; the height-to-diameter ratio of the saturated liquid buffer tank 3 is 3:1; The height-to-diameter ratio is 2:1, with a built-in mechanical stirrer with a stirring rate of 30-90r / min.

[0055] Regulate the phosphorus content (calculated as phosphorus) in the wastewater to 200mg / L, add it to the crystallization liquid tank 8, and mix it with magnesium chloride solution at a molar ratio of magnesium ion to phosphate of 1:1, contro...

Embodiment 3

[0057] Example 3. Dynamic monitoring and regulation of phosphorous synergistic crystallization in wastewater

[0058] Utilize the circulating fluidized crystallization control reaction device of wastewater phosphorus synergistic crystallization in embodiment 1 to carry out dynamic monitoring and regulation, wherein, the height-diameter ratio of the crystal growth tank 5 of crystallization regulator 1 in the reaction device is 3:1, The height-to-diameter ratio of the crystal collection tank 6 is 2:1, the height-to-diameter ratio of the bag filter 2 is 0.5:1; the height-to-diameter ratio of the saturated liquid buffer tank 3 is 2:1; the crystal-induced liquid tank 8 in the dynamic monitoring tank 4 The height-to-diameter ratio is 1:1, and the built-in mechanical stirrer has a stirring rate of 90-180r / min.

[0059] Regulate the phosphorus content (calculated as phosphorus) in the waste water to 500mg / L, add it to the crystallization liquid tank 8, mix it with the magnesium sulfat...

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Abstract

The invention discloses a circulating fluidized crystallization control reaction device for wastewater phosphorus synergy crystallization and a dynamic monitoring and regulating method thereof. The device is characterized in that a crystallization regulating device is connected with a filter through a mud discharge pipe, and the filter is connected with a saturated liquid buffer tank through a liquid pumping pipe; the saturated liquid buffer tank is respectively connected with a dynamic monitoring tank and the crystallization regulating device, and the dynamic monitoring tank is connected with the crystallization regulating device. The method comprises the following steps: regulating the concentration of wastewater phosphorus and the concentration of magnesium salt in the dynamic monitoring tank and a pH value; dynamically monitoring and regulating the oversaturated state of struvite crystal-inducing liquid in a metastable state, and conducting fluidized state reaction with seed crystal added into the saturated liquid buffer tank in the crystallization regulating device; separating crystal from mud through the filter, and discharging crystal slag to the outside; after discharging saturated liquid into the saturated liquid buffer tank and layering, discharging clarified saturated liquid into the dynamic monitoring tank, and discharging precipitated fine crystal into the crystallization regulating device. According to the circulating fluidized crystallization control reaction device for wastewater phosphorus synergy crystallization and the dynamic monitoring and regulating method thereof, the crystallization efficiency of struvite can be increased, and the crystallization efficiency of wastewater phosphorus is larger than 99 percent.

Description

technical field [0001] The invention relates to a circulating fluidized crystallization control reaction device for synergistic crystallization of phosphorous in wastewater and a dynamic monitoring and control method thereof, belonging to the technical field of agricultural resources and environment. Background technique [0002] In recent years, with the rapid development of the global economy and society, the contradiction between environmental pollution and resource shortage has become increasingly serious. The excessive discharge of a large amount of phosphorus-containing wastewater has not only caused the increasing eutrophication of water bodies, but also caused a huge waste of phosphorus resources. The recovery of phosphorus resources from wastewater is of great significance for solving the increasingly severe environmental pollution problems and the sustainable development of human beings worldwide. Therefore, the development and application of wastewater phosphorus ...

Claims

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Application Information

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IPC IPC(8): C01B25/45
Inventor 张涛江荣风方慈李平
Owner CHINA AGRI UNIV
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