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

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 ...

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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 quality and quantity, magnesium salt dosing method, Influenced by factors such as the pH value control method, it is difficult to monitor the supersaturation state of struvite crystallization, the crystallization and granulation process of struvite cannot be effectively controlled, and the crystallization efficiency is limited, etc.

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