Polyaluminum Chloride (PAC) is a common inorganic polymer coagulant. Its appearance usually appears as a yellow or white powder. It has the advantages of excellent coagulation effect, lower dosage and easy operation. Polyaluminum Chloride is widely used in the field of water treatment to remove suspended solids, colors, odors and metal ions, etc., and can effectively purify water quality. In order to ensure its effectiveness and safety during use, correct usage and storage methods need to be followed.
Usage of PAC
There are two main ways to use Polyaluminum Chloride. One is to directly put the product into the water body to be treated, and the other is to configure it into a solution and then use it.
Direct addition: Add Polyaluminum Chloride directly to the water to be treated, and add it according to the optimal dosage obtained from the test. For example, when treating river water, Polyaluminum Chloride solids can be added directly.
Prepare solution: Prepare Polyaluminum Chloride into a solution according to a certain proportion, and then add it to the water to be treated. When preparing the solution, first heat the water to boiling, then slowly add Polyaluminum Chloride and stir continuously until Polyaluminum Chloride is completely dissolved. The prepared solution should be used within 24 hours. Although it adds one more process, the effect is better.
Precautions
Jar test: There are many unknown factors in sewage. In order to determine the dosage of flocculant, it is necessary to determine the best model of PAM and the appropriate product dosage through jar test.
Control the pH value: When using Polyaluminum Chloride, the pH value of the water quality should be controlled. For acidic wastewater, alkaline substances need to be added to adjust the PH value to an appropriate range; for alkaline wastewater, acidic substances need to be added to adjust the PH value to an appropriate range. By adjusting the pH value, the coagulation effect of Polyaluminum Chloride can be better exerted.
Mixing and Stirring: Proper mixing and stirring should be done when using Polyaluminum Chloride. Through mechanical stirring or aeration, the Polyaluminum Chloride is fully contacted with the suspended solids and colloids in the water to form larger flocs, which facilitates settlement and filtration. The appropriate stirring time is generally 1-3 minutes, and the stirring speed is 10-35 r/min.
Pay attention to water temperature: Water temperature also affects the coagulation effect of Polyaluminum Chloride. Generally speaking, when the water temperature is lower, the coagulation effect of polyaluminum chloride will slow down and weaken; while when the water temperature is high, the effect will be enhanced. Therefore, when using Polyaluminum Chloride, the appropriate temperature range should be controlled according to water quality conditions.
Dosing sequence: When using Polyaluminum Chloride, attention should be paid to the dosing sequence. Under normal circumstances, Polyaluminum Chloride should be added to water first before subsequent treatment processes; if used together with other agents, a reasonable combination must be made based on the chemical properties and mechanism of action of the agent, and you should follow the principle of adding coagulant first and then adding coagulant aid.
Storage Method
Sealed storage: To avoid moisture absorption and oxidation, Polyaluminum Chloride should be stored in a dry, cool, well-ventilated place, and keep the container sealed. At the same time, avoid mixing with toxic and harmful substances to avoid danger.
Moisture-proof and anti-caking: Polyaluminum Chloride easily absorbs moisture and may agglomerate after long-term storage, affecting the use effect. Therefore, attention should be paid to moisture-proofing during storage to avoid direct contact with the ground. Moisture-proof materials can be used for isolation. At the same time, it is necessary to regularly check whether the product is agglomerated. If agglomeration is found, it should be dealt with in time.
Away from heated: Prolonged exposure to sunlight may cause Polyaluminum Chloride clumping and affect product performance; crystallization may occur at low temperatures. Therefore direct sunlight and high temperatures should be avoided. At the same time, keep safety warning signs clearly visible in the storage area.
Regular inspection: The storage condition of Polyaluminum Chloride should be checked regularly. If agglomeration, discoloration, etc. are found, it should be dealt with promptly; at the same time, the quality of the product should be regularly tested to ensure its stable performance.
Follow safety regulations: During the storage process, you should follow relevant safety regulations and wear protective clothing, gloves and other protective equipment; at the same time, keep the safety warning signs in the storage area clearly visible and follow relevant safety regulations to prevent accidents such as accidental eating or accidental touching.
Polyaluminium chloride is a widely used Flocculant in Water Treatment. To ensure its optimal performance and safety, it is crucial to adhere to proper usage and storage practices. By following these guidelines, you can maximize the benefits of PAC in water trea
Post time: Oct-17-2024