Deionized Water System for Lead Acid Battery

Pure Water Equipment (5T/hr) 1. Design Consideration1.1 Raw water quality: tap water (or deep well water)*Turbidity≤1NTU*Contamination index: SDI≤3*Conductivity: ≤ 1000us/cm* Water inlet pressure: ≥0.15Mpa* Water inlet flow: ≥8M3/H1.2 Production Capacity: Pretreatment ≥8M3/H, Reverse Osmosis and Ion Exchange ≥5M3/H1.3 Output Water Quality:  Output waterturbidity from pretreatment: ≤0.3NTUDesalination rate of reverse osmosis:≥97%   Output water conductivity from mixed column: ≤0.2us/cm, i.e. electrical resistivity ≥5×106Ω.cm1.4 Mode of Operation: automatic (analog screen control, the water level inside the water tank will control the operation of the equipment), the ion exchange resin regeneration is manual. 2. Technical ProcessTap water → raw water tank → reductive agent dosing system → raw water pump → mechanical filter →active carbon filter →scale inhibitor dosing system → precision filter → reverse osmosis → fresh water tank → fresh water pump → mixed column (one for use one as backup) → pure water tank → pure water pump → to the using pointSystem Control Type1. The system controls the working status of each device automatically. 2. Low pressure protection device will be installed before reverse osmosis device, ensuring that multiple-stage centrifugal pump works in the normal condition of no water shortage. 3. High pressure protection device is equipped behind the pump to avoid the damage of multiple-stage centrifugal pump due to starting the RO device before opening the multiple-stage centrifugal pump, or the damage of the membrane component due to the concentrated water discharge valve of the RO device is not opened properly so that the membrane component is pressed and raised suddenly. 4. The mechanical filter and activated carbon filter are controlled manually to finish the front wash and back wash of the filter material.5. The water inflow is controlled by solenoid valve; the water tank is equipped with high, middle and low liquid level switch. When reaching the high liquid level, the equipment will stop automatically; when reaching middle liquid level, the equipment will start automatically; when reaching low liquid level, the water pump will stop automatically to protect the pump.  6. For the water outlet quality, both the RO and mixed ion exchange column are equipped with digital conductivity meter for online monitoring. 7. The electrical control is controlled by PLC. There is no need for special management in the normal water production process.Technical Description1. Mechanical filterThere is dust with very fine particles, microorganism like bacterium and algae humus and ion like iron in the raw water. Mixed with water, these miscellaneous substances will be formed into colloidal particles, which can be removed after treatment with mechanical filter and carbon filter, ensuring that the feed water meets the requirement of electrodialysis inlet water F1 index, i.e. less than 4. We use quartz sand as filter material in the mechanical filter to remove the flocculation impurities (mainly organic matter, humus, clay and particle type inorganic compounds) and ion like iron, making the turbidity of the outlet water is less than 0.5NTU. 2. Active carbon filterThe SPI of the inlet water for the RO should be ≤4, another index is residual chlorine