Spray-dried Polyaluminium Chloride

       Process for preparing spray-dried polyaluminium chloride: First, polyaluminium chloride with a 38%-52% content is dissolved and introduced into a high-pressure pump. Under applied pressure, it is then sprayed through an atomisation nozzle within the dryer, dispersing into numerous minute droplets. These droplets undergo drying to yield granular chemical agent, with final drying and granulation completed simultaneously. During this process, the combination of pressure, atomisation, and drying yields a highly granular polyaluminium chloride product. These particles exhibit either porous or hollow structures. The pressure-fed spray drying method employed yields granular agents with a significantly larger surface area for water contact. This results in markedly superior wettability compared to other powdered agents, as well as enhanced water purification efficacy. This distinctive characteristic of spray-dried polyaluminium chloride has garnered favourable reception and acclaim from both new and established clients.
 

• Spray-dried polyaluminium chloride effectively removes chromium, oil, aluminium, nickel, and eliminates bacteria and odours. It eliminates harmful substances such as heavy metal ions and radioactive particulate pollutants.
• Polymerised aluminium chloride appears white or beige in colour, with minimal iron content. When dissolved in water, it exhibits no discolouration, remaining clear and transparent. It fully meets the requirements for papermaking.
• AL₂O₃ content is uniformly distributed, ensuring stable performance. The concentration of polymerised aluminium chloride is precisely controlled within specified parameters.
• The product exhibits an exceptionally low basicity. Its water quality profile is narrow, with water-insoluble solids in solid polyaluminium chloride falling below 0.03%. Other production processes struggle to achieve this standard.
• It demonstrates excellent dehydration properties and produces minimal turbidity in water purification.
• When used in the papermaking industry, it enhances paper toughness and strength, reducing susceptibility to breakage. It also serves effectively as a filter aid.

1. The pH range for spray-dried polyaluminium chloride is between 2 and 10, with the optimal range being 6 to 8.
2. When using the solid form, polyaluminium chloride must first be dissolved in water to form a solution between 10% and 26% concentration. Dilute to achieve the required concentration (typically between 2% and 5%). Add tap water during dissolution while stirring continuously to ensure uniformity. Inadequate mixing may compromise its water purification efficacy.
3. The initial dosage determined through testing should be continuously monitored and adjusted during the purification process. If flocculation is insufficient in the reaction tank, increase the dosage; conversely, reduce it if excessive flocculation occurs.
4. All equipment handling polyaluminium chloride must be corrosion-resistant. This chemical is also applicable in other water treatment industries.
5. Packaging and storage typically utilise double-layer woven plastic bags externally, with an inner plastic film bag. Each bag weighs 25kg. Packaging can be customised according to customer requirements, including label modifications. Liquid polyaluminium chloride is also available for sale.
6. During transportation, avoid co-loading with other chemical substances. Store in a well-ventilated, dry location, protected from wind and direct sunlight. Never store alongside flammable, explosive, or toxic chemicals. Moisture exposure does not affect purification efficacy, but the product should be used promptly thereafter.