\Magnetic flocculation
Magnetic coagulation high-efficiency sedimentation system
The magnetic coagulation system adds flocculants, magnetic seeds, and coagulants to the mixing reaction tank for magnetic coagulation reaction; Enter the clarification tank for efficient solid-liquid separation; The sludge containing high concentration magnetic particles in the clarification tank is lifted to the high shear machine and magnetic separator through a magnetic mud crushing pump to separate the magnetic particles from the sludge, and the magnetic particles are returned to the mixed reaction tank to continue participating in the reaction. The remaining sludge after separation is discharged into the sludge tank for the next step of sludge concentration and dehydration treatment.

Equipment characteristics
1. The settling speed is fast, reaching a high settling speed of 40m/h;
2. High surface load, up to 20m ³/ m2h~40m ³/ m2
h;
3. Short retention time, from inlet to outlet, can be as low as 20 minutes (in some cases, the retention time can be shorter);
4. Effectively reduce the floor area of the sedimentation tank, which can be as low as 1/20 of the conventional process;
5. Efficient phosphorus removal, with optimal effluent TP as low as 0.05mg/L;
6. The effluent has high transparency and turbidity<1 NTU;
7. High SS removal rate, optimal effluent<2mg/L;
8. Magnetic powder recycling, with a recovery rate of over 99% and low operating costs;
9. Effectively optimize the dosage of chemicals, reduce operating costs, and in the best case, save 15% of the dosage;
10. The system is compact (can also be made into a mobile processing device), which can achieve automatic control and is easy to operate.
Advantages of magnetic coagulation sedimentation technology
(1) Small footprint: The system has a high degree of integration, and the investment of magnetic loading materials leads to a fast settling speed of the flocs, thereby reducing the device volume and overall footprint, which is more than 15 times smaller than the conventional process footprint; The area of a single set of 30000 m3/d scale loading coagulation magnetic separation system is about 300m2.
(2) Mobility: With high integration, the device can be made into on-board or shipborne mobile devices, making it very suitable for water treatment in various fields such as emergency events, rural domestic sewage, and drinking water.
(3) Quick effect: fast settling speed, short residence time, fast start-up time, less than 20 minutes of inlet and outlet water in the entire system, and good treatment effect. It can efficiently remove various pollutants, and its effluent quality can be comparable to that of ultrafiltration membrane effluent, especially for total phosphorus (TP) in water bodies, which can reach<0.2mg/L.
(4) Low investment: The system is simple, covers a small area, mobile equipment does not require land approval, has a short construction cycle, and can be retrofitted on top of the existing equipment, greatly reducing investment costs.
(5) Low operating cost: The system has low energy consumption, simple equipment maintenance, and advanced magnetic separation and recovery device allows for complete recovery of magnetic substances. The efficient sludge reflux system reduces the dosage of reagents, which can effectively reduce operating costs.
In addition, compared to other processes, magnetic separation technology has the following advantages:
(1) This process can effectively treat primary, secondary, and tertiary urban wastewater, as well as reclaimed water, various industrial wastewater, and drinking water.
(2) The surface load can reach 20m3/m2h to 40m3/m2h.
(3) Sludge is highly compressed and has a high concentration
(4) The service life of the equipment is long, and in addition to normal maintenance, there is no need to replace components, resulting in high secondary investment (membrane process operation and maintenance costs are estimated to be more than 1.3 times the cost of loading the coagulation magnetic separation system).
(5) It has strong impact resistance to water quality and quantity, and the peak flow rate in a short period of time can reach 1.5 times the average flow rate. When there is a significant fluctuation in the inlet water quality or other harmful metal ions enter the magnetic separation system, the system can still maintain a high removal efficiency and significantly remove pollutants from the water.
(6) If the total phosphorus index continues to improve in the future, there is no need to increase investment in the construction of new facilities. Simply use the existing loading coagulation magnetic separation system and increase the dosage of flocculant during operation to meet the requirements, even reaching the US standard TP ≤ 0.2ppm.
Magnetic powder recycling equipment
a. Magnetic seed loading: Different levels of magnetic seeds are used for different water bodies, with magnetic seeds as carriers. Under the action of coagulants and coagulants, the suspended solids in the water body are made to have micro magnetism.
b. Reagent dosing: coagulants and coagulants aids commonly used in water treatment, such as Aluminium chlorohydrate (PAC), Aluminium chlorohydrate iron (PAFC), polymeric Iron(III) sulfate, polyacrylamide (PAM), etc.
c. Magnetic seed recycling: The dispersion, demagnetization, and separation of magnetic sludge flocs are achieved through a magnetic seed recycling system, and the recovered magnetic seeds are recycled for use.
Application field
1.Industrial wastewater treatment: mine water in the coal industry, graphite containing steel rolling wastewater in the metallurgical industry and general drainage from the steel plant, common water treatment at oil recovery and reinjection points in the oil industry, and pretreatment and fine treatment of paper making wastewater;
2.Sewage treatment: primary enhanced treatment of sewage, upgrading and renovation of sewage treatment plants, deep dephosphorization treatment of concentrated wastewater from sewage treatment plants, and membrane pre-treatment of reclaimed water reuse;
3.Public water purification: turbidity reduction, algae removal, and phosphorus removal of river water, landscape water, and lake water
4.Water supply pre-treatment: pre-treatment of domestic and industrial water sources
Emergency response: emergency response to water pollution accidents