Water quality standard for water jet loom | ||||
Analysis Project | Optimum water quality standard | Allowable water quality standard | Main ingredient | Impact on weaving and weaving machines |
Turbidity (mg/kg) | Below 1.5 | Below 2.0 | Organic matter: animal and plant debris, corrosive soil, microorganisms Inorganic matter: clay, rock, soil microparticles; iron, manganese and other oxides | Attached to rust, rust, corrosion, clogging, stains on the fabric |
PH(25 degree) | 6.8～7.2 | 6.7～7.5 | - | Corrosive and corrosive due to acidic or alkaline water, the slurry is desizing due to alkaline water |
Total hardness | Below 25 | Below 30 | Calcium ion, Magnesium ions | The weft insertion may be caused by the adhesion of water rust on the nozzle; the electric rust is attached to the electric rust, which causes poor weft insertion, which makes the insulation of the weft detector low. |
All iron and manganese ions (mg/kg) | Below 0.15 | Below 0.2 | Ionic oxide,Fe2+,Mn2+ | Corrosion, coloring |
Free chlorine molecule (mg/kg) | Below 0.1 | Below 0.3 | - | Strong corrosive and strong oxidizing power |
Chloride (mg/kg) | Below 12 | Below 20 | Cl- | The biggest cause of corrosion, causing damage to the pump spring |
M-alkalinity (mg/kg) | Below 50 | Below 60 | Condensate (NaHCO3), etc. due to softening treatment of hydrogen carbonate ion HCO3 | Does not cause direct effects on fabrics, etc. |
Potassium permanganate consumption(COD) (mg/kg) | Below 2 | Below 3 | Organic matter, bacteria, mold, etc. | Corrosion, stains on the fabric, falling pulp, low film strength |
Evaporation residue (mg/kg) | Below 100 | Below 150 | Total amount of impurities in water | Cause various faults |
Conductivity (us/cm) | 100～150 | 80～200 | Conductivity between electrodes that are spaced apart in water (depending on the electrolyte dissolved in the water) | If it is obviously low, the function of the power-on weft detector will be impaired; if it is too high, it means that there are too many impurities in the water, which increases the electric corrosion of the probe. |
Water temperature (degree) | 16～20 | 14～20 | - | If it is too high, the phenomenon of falling pulp increases, and the bacteria are easy to multiply; if it is too low, the strength of the slurry, wax, etc. is low. Too high or too low will cause the weft insertion performance to drop. |
