Engineering commercial and industrial water softeners
1. Water softener filter
Ion exchange resin is used in water softening system for Ca+,Mg+ and other cation exchange. To prevent undissolved salt from depositing in the surface of reverse osmosis membrane ,the resin which ensures well permeable ability of membrane module after it works a long time and extends lifetime of membranes , enhances quality stability of ro purified water . Water softener is vertical structure which use frp material , produced as vessel standard, designed pressure for 8kg/cm2 that American auto valve is used for full-automatic salt regeneration .
Fiest, with strong-acid out from raw water, outlet water is relative softener water cation resin, Mg+ and Ca+ are exchanged out from raw water. Thus, water softener out from water softener is relative softer water. In this phase,Chemical reaction is 2RNa+Ca+(mg2+)=R2Ca(mg)+2Na+.The resin must be regenerated when it had adsorbed enough Ca+, Mg+, With 2%-5% strong salt water (with flow rate of 6/m/h), it exchanges out Ca+,Mg+from the resin, then whose ability of ion exchange will be recovered. In this step, the chemical reaction is: R2Ca+2Na+=2RN+Ca2+. At ast,discharging waste water.
2. Four key steps for the whole regeneration:
1. Backwashing-to loose resin layer
2. Slow-washing for salt suction---exchange-reaction
3. Flushing-Flushing away Ca+, Mg+exchanged out from chemical reaction
4. Filling water - for next regeneration
Industrial Water Softening Process Theory
Our Engineering water softeners utilize hydraulic or pneumatic valves, which feature a co-
current regeneration sequence based upon elementary principles of iron exchange. Initially,
strong acid cation resin in the sodium (Na +1) form is placed into service. During the
sodium cation exchange water softening process, sodium ions are exchanged for undesirable
quantities of calcium (Ca +2), magnesium (Mg +2), and iron (Fe +2). Sodium ions already
present in the water being softened pass through the process unchanged. Upon exhaustion of
the resin (as indicated by unacceptable hardness leakage), a regeneration sequence
involving sodium chloride (NaCl) is utilized. The generation sequence reverses the above
process and converts the strong acid cation resin back to the sodium form for the
subsequent water softening cycle. Capacities range from 20,000 to 30,000 grains per cubic
foot depending upon the total dissolved solids content of the water, the effluent water
quality desired, and the amount of sodium chloride regenerant used. It should be noted that
although the water is softened, the total dissolved solids content remains unchanged.
Further, the effluent contains the same amount of anions as the raw water. The equipment is
co-currently operated (down-flow exhausted; down-flow regenerated). All models have five
distinct cycles of operation:Service - softening process; down-flowBackwash - hydraulic
cleaning; up-flowBrine inject - restores resin to sodium form; down-flowSlow rinse -
displaces residual brine; down-flowFast flush - prepares softening resin for service
cycle; down-flow.
Typical Industrial Water Softener Applications
Dairies, schools, factories, hospitals, laundries, car washes, nursing homes, boiler feed
water, food industry plants, municipal water works, apartments and condominiums, motels,
hotels, resorts, manufacturing facilities, institutional facilities, office complexes,
cooling towers, farmseach could benefit from the installation of Engineering
water softener. The system quickly begins paying for itself through reduced energy
consumption, extended water appliance life, and lower plumbing repairs. Water heaters and boilers will last longer; costly special chemicals for boilers and steam handling equipment can be greatly reduced; the service life of linens, clothing, fixtures and appliances will be noticeably extended; and process water will be more consistent and efficient.
Control mode of fully automatic water softener
(
1) Single tank time type: It adopts microcomputer to control the time, when operation of the equipment reaches setting time, it will automatically enter the regeneration condition, which can be regenerated for once a day or once for some day.
(2) Single tank flow type: It adopts control of turbine flow or electronic flow sensor, when the yield of softener reaches preset flow it will automatically enter the regeneration condition, which can be recycled many times every day.
(3) Double tanks flow type: Which could be divided into one running-one alternating, and simultaneous running and separately regeneration.
(4) One running and the other alternation type: One tank is running while the other is alternating, when water yield of operating tank reaches the preset flow rate, it will enter the regeneration stage, meanwhile, the other tank will enter the working state, these two tanks work and regenerate alternatively to realize continuous water supplying of 24 hours.
(5) Simultaneous running and separately regeneration type: Two cans running simultaneously, when the flow rate reaches the setting rate, one tank (can) will regenerate and the other tank will output water continuously, when the first regeneration tank finish the regeneration it will enter the working stage, the other one will enter regeneration stage, these two cans finish regeneration and enter working state simultaneously.
Technical parameters:
| Category |
Model |
Recommended
water yield
(M³/h) |
Tank size
Diameter *Height(mm) |
Salt box
(L) |
Amount of resin(KG) |
Dual-valve and
dual-tank (simultaneous
operation and respective
regeneration) |
YL-II-36 |
24-36 |
900×1900 |
800 |
1040 |
| YL-II-50 |
36-50 |
1000×2200 |
1000 |
1440 |
| YL-II-70 |
50-70 |
1200×2400 |
1500 |
2000 |
| YL-II-100 |
70-100 |
1500×2500 |
2000 |
3200 |
Dual-valve and
dual-tank(One for
use and the other for standby) |
YL-II-1 |
1 |
250×1400 |
60 |
80 |
| YL-II-2 |
2 |
300×1400 |
100 |
120 |
| YL-II-3 |
3 |
350×1400 |
100 |
160 |
| YL-II-4 |
4 |
400×1650 |
200 |
240 |
| YL-II-5 |
5 |
500×1750 |
300 |
360 |
| YL-II-6 |
6 |
600×1900 |
350 |
480 |
| YL-II-10 |
8-10 |
750×1900 |
500 |
720 |
| YL-II-18 |
12-18 |
900×1900 |
800 |
1040 |
| YL-II-25 |
18-25 |
1000×2200 |
1000 |
1440 |
| YL-II-35 |
25-35 |
1200×2400 |
1500 |
2000 |
| YL-II-50 |
35-50 |
1500×2500 |
2000 |
3200 |
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