Electric microfiltration device system for synchronously removing hardness and harmful metal of drinking water
A technology of drinking water and microfiltration, which is applied in the direction of water pollutants, water/sewage treatment, water treatment parameter control, etc., can solve the problems of membrane pollution, flotation efficiency, plate spacing and other factors, to achieve environmental friendliness, Strong anti-pollution performance and strong durability
Active Publication Date: 2021-10-01
QINGDAO TECHNOLOGICAL UNIVERSITY
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AI Technical Summary
Problems solved by technology
However, the membrane fouling problem is an urgent problem to be solved.
Electric flotation is to remove pollutants in the water body through the adhesion of tiny bubbles such as hydrogen and oxygen generated by water electrolysis to form flotation bodies. It is widely used in the removal of harmful metal ions, but its flotation efficiency is easily affected by flotation. The influence of factors such as selection time, pH value, current density, and plate spacing
Method used
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Effect test
Embodiment 1
[0044] The concentration of Cr(VI) is 500μg / L, the concentration of calcium ion is 150mg / L, the water body with pH 6.5, the current density is 3mA / cm 2 , when the residence time is 5min, after treatment by the device, the removal rate of hexavalent chromium reaches 98%, the removal rate of total chromium reaches 95%, the concentration of calcium ion decreases to 95mg / L, and the pH of the effluent is 6.2.
Embodiment 2
[0046] Use a water body with a Cd concentration of 100μg / L, a calcium ion concentration of 120mg / L, and a pH of 7, and a current density of 1mA / cm 2 , the residence time is 10min, after treatment, the calcium ion concentration removal reaches 60%, the Cd removal rate reaches 99%, and the pH of the effluent is 7.5.
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The invention relates to the field of drinking water safety guarantee, in particular to an electric microfiltration device system for synchronously removing hardness and harmful metal in drinking water. In the electric microfiltration device system for synchronously removing the hardness and the harmful metal in the drinking water, a feed liquid pool is connected with a first pump body through a guide pipe, the first pump body is connected with a cathode chamber through a guide pipe, the cathode chamber is connected with a pressure gauge through a guide pipe, the pressure gauge is connected with a second pump body through a guide pipe, and the second pump body is connected with an anode chamber through a guide pipe; and the anode chamber is connected with the third pump body through a conduit. According to the invention, calcium carbonate is precipitated by using the strong alkaline atmosphere in the cathode chamber, the membrane surface and the membrane holes, harmful metal ions generate co-precipitation in the precipitation process, and generated insoluble crystals are synchronously intercepted by the microfiltration membrane. And the cathode effluent flows through the anode chamber to ensure that the overall effluent is neutral and reaches the drinking water standard. When the membrane flux is obviously reduced, the cathode and the anode can be reversed, and reverse water flow is applied to the membrane electrode, so the membrane flux can be completely recovered.
Description
technical field [0001] The invention relates to the field of water treatment, in particular to an electrochemical reaction device which can be used for removing hardness and harmful metals in drinking water. Background technique [0002] Drinking water is inseparable from people's life, and the quality of drinking water has a vital impact on people's health and life safety. Excessive hardness of drinking water will cause certain harm to the human body. Therefore, it is necessary to remove the hardness of the water body whose hardness exceeds the standard. In addition, harmful metal pollution in drinking water is also a problem that cannot be ignored. [0003] A variety of minerals and gases are dissolved to varying degrees in various natural waters. Rain and snow water fall to the ground and flow into rivers, lakes, ditches and ponds, continuously dissolving calcium, magnesium, sulfur, chlorine and other substances in soil and rocks. Therefore, the minerals in river and la...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C02F1/469C02F1/46C02F101/20C02F101/22
CPCC02F1/469C02F1/4602C02F2101/20C02F2101/22C02F2209/055C02F2303/22C02F2303/14
Inventor 江波李朝巴胥臣赵泽坤李一凡王娟刘奕捷
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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