Pipeline Blockage Caused by Polyaluminium Chloride: Causes and Measures

Polyaluminium chloride (PAC), a versatile and efficient coagulation agent in water treatment, has been instrumental in enhancing the quality of both municipal and industrial water supplies.  Yet, the benefits of polyaluminium chloridecome with a caveat: the potential for pipeline blockage, a problem that can disrupt operations and necessitate costly repairs.  To mitigate this risk, it is crucial to delve into the specific factors contributing to PAC-induced pipeline obstruction.

The reason of polyaluminum chloride blocking pipeline:

1. Quality Issues of Polyaluminium Chloride:

• Poor-quality PAC often contains excessive water-insoluble substances and impurities, leading to slow dissolution and even agglomeration.

• PAC with low content requires the addition of more product to achieve the desired treatment effect, creating a vicious cycle.

2. Dilution Ratio Problems : Insufficient dissolution of polyaluminum chloride solid particles due to inadequate dilution (typically at a 1:10 ratio) can result in solid residues blocking pipelines.

3. Improper Dissolution Methods : Inadequate understanding of the dissolution capacity of the dosing equipment can lead to PAC settling at the bottom of the dosing tank without complete dissolution, eventually causing pump blockage.

How to prevent polyaluminum chloride from clogging pipes:

1. Enhance PAC Quality:

• Choose polyaluminium chloride products with high content, low impurities, good flocculation, and rapid precipitation to reduce the risk of pipeline blockage.

• Avoid purchasing low-quality polyaluminium chloride solely based on price.

2. Adjust Dilution Ratio:

• Ensure PAC is fully dissolved by using an appropriate dilution ratio (starting at 1:10 and increasing if necessary).

3. Improve Dissolution Methods:

• Before dissolution, assess the dissolution capacity of the dosing equipment and adjust accordingly.

• Ensure stirring equipment is adequate to prevent polyaluminium chloride from settling.

4. Install and Maintain Filters : Add filters before the pump and regularly check and replace them to prevent impurities from entering the pipeline.

5. Increase Pipeline Diameter : Consider increasing the pipeline diameter to improve flow and reduce the risk of blockage.

6. Avoid Contamination : When adding PAC, ensure that packaging debris is not introduced into the system.

7. Install Flushing Equipment : Add pipeline flushing equipment to clear any crystallization or blockages within the pipeline using high-pressure, high-flow pumps.

8. Control Temperature : Maintain appropriate temperatures to prevent PAC from crystallizing and causing blockage.

9. Use Suitable Valves : Select valves with loading force, such as plate valves or spring-loaded valves, for the inlet and outlet of the dosing pump.

By addressing the causes and implementing these measures, the risk of pipeline blockage caused by polyaluminium chloride can be significantly reduced.If you encounter any problems when use, please contact polyaluminum chloride manufacturer -Tangda, we will arrange professional technical personnel to communicate with you to help you solve the problem, to provide you with free testing, selection, sample and other services. Try our best to serve you and sincerely look forward to cooperating with you!