一种高TDS废水净化回用系统

Abstract

本发明涉及了水处理技术领域，具体涉及了一种高TDS废水净化回用系统。包括依次连接的活性污泥法曝气池、软化罐、超滤膜系统、低压反渗透装置以及碟管式反渗透装置；该系统的技术作用在于通过“生物预处理+化学软化+超滤+双级反渗透”的协同工艺，实现高盐废水的梯级净化，其中生物处理降低有机负荷，软化预处理防止膜污染，超滤提升水质稳定性，双级反渗透确保高效脱盐和浓水减量；最终技术效果表现为：出水TDS≤200mg / L，悬浮物≤1mg / L，满足工业回用标准，系统回收率可达80%以上，大幅减少浓水排放，实现高盐废水的高效回用与近零排放，适用于化工、制药等高盐废水处理领域。

Claims

1. A high TDS wastewater purification and reuse system, characterized in that, It includes an activated sludge aeration tank, a softening tank, an ultrafiltration membrane system, a low-pressure reverse osmosis unit, and a disc tube reverse osmosis unit connected in sequence. The activated sludge aeration tank is equipped with an aeration structure and aerobic bacterial activated sludge, which is used to biodegrade the received high TDS wastewater. The softening tank is used to receive the effluent from the activated sludge aeration tank for hardening removal treatment. The ultrafiltration membrane system is used to receive the water effluent from the softening tank to remove suspended solids and colloids; The low-pressure reverse osmosis unit is used to receive the effluent from the ultrafiltration membrane system to remove dissolved salts and small molecule organic matter, and the produced water is connected to the reuse system; The disc tube reverse osmosis unit is used to receive the concentrate discharged from the low-pressure reverse osmosis unit for further concentration, and the produced water is connected to the reuse system.

2. The high TDS wastewater purification and reuse system of claim 1, characterized in that, The softening tank is connected to a dosing device, which contains the chemical agents required for softening; the softening tank is equipped with a stirring device.

3. The high TDS wastewater purification and reuse system of claim 2, wherein, The dosing device contains sodium hydroxide and sodium carbonate.

4. The high TDS wastewater purification and reuse system according to claim 1, characterized in that, An ultrafiltration buffer tank is provided between the softening tank and the ultrafiltration membrane system to regulate water flow and pressure.

5. The high TDS wastewater purification and reuse system of claim 4, wherein, A pH adjustment device is installed on the connecting pipeline between the softening tank and the ultrafiltration buffer tank.

6. The high TDS wastewater purification and reuse system of claim 5, wherein, An ultrafiltration feed pump is provided between the ultrafiltration buffer tank and the ultrafiltration membrane system.

7. The high TDS wastewater purification and reuse system of claim 1, wherein, An RO feed water buffer tank is provided between the ultrafiltration membrane system and the low-pressure reverse osmosis device to regulate water flow and pressure.

8. The high TDS wastewater purification and reuse system according to any one of claims 1-7, wherein, It also includes a finished water tank, the inlet of which is connected to the product water inlet of the low-pressure reverse osmosis unit and the product water inlet of the disc tube reverse osmosis unit, respectively.

9. The high TDS wastewater purification and reuse system of claim 8, wherein, The finished water tank is connected to a finished water pump, which is used to pump the purified water in the finished water tank to the reuse system.

10. The high TDS wastewater purification and reuse system of claim 9, wherein, It also includes an evaporation crystallization system, whose inlet is connected to the concentrated water outlet of the disc tube reverse osmosis unit, for receiving the concentrated water discharged from the disc tube reverse osmosis unit and performing evaporation crystallization.

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