Device for removing phosphate from wastewater by using struvite particle crystallization method

Abstract

The invention relates to a device for removing phosphate from wastewater by using a struvite particle crystallization method. The device comprises an outer cylinder, a water receiving guide flow cylinder, a circulating return pipe and a push flow circulating component, wherein the outer cylinder consists of an upper straight cylinder, a middle conical cylinder and a bottom end socket which are connected with one another in sequence, and a water outlet tank is arranged outside the upper straight cylinder; the water receiving guide flow cylinder is positioned on a middle axis in the outer cylinder and consists of a guide flow cylinder and a water receiving cylinder; the circulating return pipe consists of a flow guide straight pipe and a water inlet pipe, the flow guide straight pipe is arranged vertically, the upper end of the flow guide straight pipe extends into the guide flow cylinder, the lower end of the flow guide straight pipe is close to the bottom end socket, and the water inlet pipe runs through the middle conical cylinder and is communicated with the flow guide straight pipe; and the push flow circulating component comprises a stirring shaft extending to the inside of the flow guide straight pipe, a push flow impeller arranged on the stirring shaft and a variable frequency motor for driving the stirring shaft. Compared with the prior art, the device provided by the invention can realize integration of reaction, refluxing, particle growth, automatic screening, struvite discharge, precipitation and drainage, is compact in equipment, saves the floor area and reduces the investment.

Description

technical field [0001] The invention relates to a device for removing phosphate in wastewater by struvite particle crystallization, which belongs to a device for treating phosphorus-containing waste (sewage) water and recovering phosphorus resources. Background technique [0002] In 2007, a blue-green algae outbreak occurred in Wuxi Taihu Lake, which caused the deterioration of surface water quality, seriously threatened the safety of local drinking water, and caused adverse social impacts. emission. In my country, a large number of various phosphorus-containing raw materials are developed and utilized in industry and agriculture. Most of the phosphorus elements enter the water environment through various channels and cause pollution. According to statistics, more than one million tons of phosphorus directly or indirectly enter the water environment every year. At the same time, phosphate rock has been listed by the Ministry of Land and Resources of my country in 2010 as on...

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Problems solved by technology

The method for recovering phosphorus in the above-mentioned patents is cumbersome, and the required equipment occupies a large area, the project investment is large, and the operating cost is high.

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