Talk about the advantages of ultrapure water equipment and what are the performance indicators?

The size of the outlet siphon center tube 6 and bell 7 determines the ground flow rate, generally 6-1.0m/s. Pipe diameter is too large, it will make the needle valve intake is not enough to regulate the role of the water level is not sensitive; Pipe diameter is too small, the head loss increases, accordingly, in the increase in the depth of the pool. The number of filter grids is high, and the flushing hood is used with high efficiency. Ultrapure water equipment to meet the flushing requirements, the number of cells of the old filter pool shall not be less than 8. If the pump suction flushing cover, more filter cells can be arranged into a fishing rod. Flushing cover can withstand truss car for longitudinal movement, the cover itself can also be in the truss car for lateral movement, but the operation is more complex. It is believed that the rinsing interval between two filter cells are equal, and equal to the working cycle of the filter tank divided by the number of filter cells. The advantages of the mobile hood filter tank are: simple structure of the tank without washing tank or water tower; no large valves, fewer fittings; the use of pump suction rinsing hood, the depth of the pool is shallow. However, the mobile hood filter pool than other fast filter pool increased electromechanical and control equipment; automatic control and maintenance. Mobile hood filter is generally more suitable for large and medium-sized water plants, in order to give full play to the use of rinsing hood. Ultrapure water equipment exchange membrane performance is multi-faceted, must be based on the electrochemical properties of the membrane, chemical properties and physical and mechanical properties of the membrane for a comprehensive evaluation and analysis. 1, the exchange capacity of the exchange capacity of the ion exchange membrane is a key parameter, its unit is mmol / g. General exchange capacity of the membrane, selective permeability is good, conductive capacity is also strong. However, because the active group is generally hydrophilic, so when the active group content is high, the water in the membrane and the degree of solubility will increase, thus affecting the strength of the membrane. Sometimes the membrane structure is too loose, and the selectivity of the membrane decreases. General exchange capacity of the membrane is about 2-3mmol / g. 2, water content refers to the membrane and the active groups combined with the intrinsic water, by the number of grams of water contained in each gram of dry membrane said that the water content and its exchange capacity and cross-linking degree is related to the above, as said, with the increase in the exchange capacity, the water content increases. Ultrapure water equipment crosslinking degree of membrane due to the membrane structure, the water content will be reduced accordingly. Increase the water content of the membrane, the conductive capacity of the membrane can be increased, but due to the membrane swelling will be combined with the newt selectivity decline, the general water content of the membrane about 20% -40% or so.3, electrical conductivity (membrane resistance) is generally used to conductivity (Ω-1.cm-1) or electrical resistivity (Ω.cm) that is also commonly used membrane surface resistance that is, the resistance of a unit of the membrane area (Ω.cm2), said The resistance of the medical team to indicate the use of different. Generally speaking, in the case of other properties do not affect the resistance of the smaller the better, in order to reduce power consumption, membrane resistance and membrane structure and membrane thickness, in addition to the external solution and temperature, usually stipulated 25.C, in 0.1 mol / L KCL solution or 0.1 mol / L NaCL solution measured in the membrane conductance as a standard of comparison.