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Spray-dried and drum-dried Polyaluminum Chloride (PAC) exhibit significant differences in manufacturing processes, performance characteristics, and application scenarios. The following comparative analysis examines key parameters, supported by authoritative references:

Spray-dried polyaluminum chloride (PAC) and plate-and-frame polyaluminum chloride (PAC) are two Water Treatment flocculants produced using different processes. The main differences are as follows:

Polyaluminum Chloride (PAC) is a commonly used flocculant in water treatment. It is prone to dampness and caking during storage and transportation. Whether it can still be used depends on the degree of dampness, the state of caking, and whether it has deteriorated.

Winter Application Technology of Polyferric Sulfate (PFS) in Water Treatment: PFS hydrolyzes to form polymeric hydroxyl complexes that remove pollutants. However, low winter temperatures impair its effectiveness through three mechanisms: slowing hydrolysis rates (resulting in poor floc formation), reducing water molecule activity (decreasing particle collisions), and affecting dissolution efficiency (increasing turbidity). These challenges require targeted solutions to address the issues of "slow hydrolysis, difficult coagulation, and poor dissolution".

Polyaluminum Chloride (PAC) is an inorganic polymer with a core chemical structure of poly-nuclear hydroxyl complexes (general formula: [Al₂(OH)ₙCl₆₋ₙ]ₘ). When dissolved in water, aluminum ions (Al³⁺) undergo hydrolysis reactions, releasing hydrogen ions (H⁺) that create an acidic solution with a pH value stabilized between 2.0–4.5. This characteristic gives PAC the following advantages

There are significant differences in raw materials, cost, product purity and application fields of polyaluminum chloride (PAC) with different production processes.

The detection methods of liquid polyferric sulfate content are summarized, which are divided into three categories: core index detection (total iron content and salt base degree) and auxiliary methods based on national standards and commonly used industry technologies: