9010 scale inhibitorDilution and usage method:

1. Dilution: TRISEPTMLHZ-9010 cannot be diluted to less than 5%, that is, the dilution ratio cannot exceed 20 times. Demineralized water and softened water should be used for dilution.

2. Calculation of dosage: The dosage of TRISEPTMLHZ-9010 needs to be calculated using calculation software based on the characteristics of the original water quality and RO system to determine the dosage of *. Users can obtain free calculation software from Huicongyuan Company, or provide information on water quality and RO system to Huicongyuan Company for calculation.

3. Selection of metering pump: The density of TRISEPTMLHZ-9010 original solution is 1120g/L, and its dosage is: dosage (L/H)=* dosage (ppm) × raw water flow rate (ton/hour) ÷ 1120

Select the appropriate flow rate for the metering pump based on the dosage and flow rate.

Due to the high output accuracy of the stroke and pulse speed of the metering pump at 25-90% of full scale, a pump adjusted at 25-90% of full scale is selected. In addition, to ensure uniform and stable dosing, a high-speed low stroke pump is used.

If the calculated addition flow rate is too small, in order to ensure the accuracy of the addition, the original solution of TRISEPTMLHZ-9010 can be appropriately diluted and added. The approximate value of the diluted dosing flow rate is equal to the original dosing flow rate multiplied by the dilution factor.

4. The concentration of the standard solution of scale inhibitor in the dosing box is:

Concentration of standard solution in the box=RO feedwater concentration (m3/h) x dosing amount (ppm)

1000 x standard density (kg/L) x actual working output of dosing metering pump（L/H)

5. Add scale inhibitor standard solution to the dosing box, volume:

Standard solution volume:(L）=The concentration of the standard solution in the box multiplied by the effective volume of the dosing box（L)

6. The volume of concentrated solution added directly to the dosing box is calculated as follows:

Volume of concentrated solution=Volume of standard solution in the dosing box（L）Density of standard solution (kg/L) x Dosage of medication (ppm)

Dilution ratio (LHZ-9010 is 4) x concentration of scale inhibitor (kg/L)

Precautions for use:

Representative static and dynamic tests (see performance testing section for details), as well as extensive engineering applications, have shown that TRISEPTMLHZ-9010 is a scale inhibitor for reverse osmosis membranes and has a protective effect on reverse osmosis membranes. However, due to differences in raw water quality and reverse osmosis design, in order to ensure the safe and economical operation of the user system, the following points should be noted when using TRISEPTMLHZ-9010:

1. The use and storage temperature of TRISEPTMLHZ-9010 is 0-49 ℃. Excessive temperature or strong light exposure will cause its active ingredients to aggregate and precipitate into a gel like substance. If the temperature is too low, it is prone to crystallization.

2. TRISEPTMLHZ-9010 does not contain phosphorus and its original solution has a low pH value, therefore it has good antibacterial effect. But if the dilution ratio is too high, it will reduce or even lose its antibacterial effect. At this point, bacteria will breed in the medicine box and produce sticky flocculent substances. To solve this problem, the following solutions can be adopted:

a、 Use a small flow pump to reduce the dilution factor and try to add the original solution as much as possible.

b、 Increase the cleaning frequency of the medicine box and clean the dead corners thoroughly.

c、 Add an appropriate amount of antibacterial agents such as Na2S2O3 to the medicine box.

3. Activated carbon filters are often used in processing systems to adsorb organic matter from raw water, and activated carbon also adsorbs TRISEPTMLHZ-9010. Therefore, the dispensing point of TRISEPTMLHZ-9010 needs to be placed behind the activated carbon filter. The residual chlorine in the raw water needs to be reduced to below 0.5 ppm with a reducing agent. If pre-treatment cannot meet this requirement, the height of fine sand in the cushion layer of the activated carbon filter needs to be increased, and activated carbon with excellent performance and chlorine resistance needs to be used to reduce the negative effects such as pollution blockage and adsorption caused by carbon leakage.

4. Before starting the trial operation, it is necessary to calibrate the actual output of the metering pump;

5. When preparing the medicine, it should be thoroughly stirred;

6. The preparation of concentrated solution into standard solution requires equipment, and users cannot prepare it without the permission of TRISEP company. Huicong Source company provides all users with standard solution, and users can dilute and add 1-4 (RO water or pure water) according to the flow rate of the metering pump on site. But the dosage must be calculated based on standard solution. The dosage is calculated by the dosing software of Huicongyuan Company as the standard solution dosage.

Scale inhibition mechanism of TRISEPTMLHZ-9010

The scaling process on the membrane surface is mainly the crystallization process of salts on the membrane surface, which is influenced by three steps:

• Formation of supersaturated solution
• Generate crystal nuclei
• Crystal nucleus grows to form crystals

Any one of these three steps that is disrupted will suppress or slow down the scaling process. Moreover, TRISEPTMLHZ-9010 scale inhibitor has varying degrees of influence on these three steps, thus exhibiting * scale inhibition effect. Its scale inhibition mechanism is as follows:

① Chelation effect: The active ingredient of TRISEPTMLHZ-9010 can form stable chelates with scaling ions in water, greatly reducing the supersaturation of scaling ions.

② Lattice distortion effect: During the formation of crystals, scaling ions are affected by the active components of TRISEPTMLHZ-9010, resulting in defects such as vacancies and dislocations in the lattice, and distortion such as embedded structures. The result is that the various crystal planes of the crystal develop unevenly and stress is generated within the crystal. These stresses cause large crystals to shatter into small grains. Small grains will stabilize in water due to Brownian motion.

③ Adsorption and dispersion effects: The active ingredient of TRISEPTMLHZ-9010 contains polyacrylic acid, which ionizes in water and carries a negative charge on its surface. When it encounters suspended particles in water, it will adsorb onto the surface of the particles due to physical or chemical adsorption. The result is the formation of a double layer on the surface of the particles, where the repulsive force of the same charge stabilizes one aspect in water for a long time. On the other hand, when particles settle, the settling speed is extremely slow. And during particle deposition, there cannot be tight adhesion between particles and the deposition surface, only a loose deposition layer can be formed.

④ Adsorption and flocculation: TRISEPTMLHZ-9010 can condense colloids or other pollutants in water into flocs, which can be removed through a security filter. The flocculent material that penetrates the security filter will also have a low density and cannot adhere tightly to the membrane surface, making it easy to be discharged with concentrated water.

⑤ Threshold effect: TRISEPTMLHZ-9010 has a threshold effect, which can achieve scale inhibition with a very small dosage.

Performance testing - Small beaker experiment

Comparison of the performance of TRISEPTMLHZ-9010 with sodium hexametaphosphate in representative small-scale experiments