Preparation Purpose

Concentrated polymers and dry chemicals require dilution before injection. Improper mixing creates fish-eyes or clumps reducing treatment effectiveness. Preparation tank with proper agitation ensures complete dissolution producing uniform solution for accurate dosing.

Tank Configuration

Cylindrical atmospheric vessel with water inlet for dilution, chemical addition point, mechanical mixer dissolving and blending, outlet to dosing pumps, level control, calibration markings, and drain connection.

Mixing System

Top-entry agitator with propeller or turbine impeller creating circulation. Variable speed adjusts intensity for chemical type. Gentle mixing for fragile polymers preventing chain breakage. More vigorous for dry chemical dissolution.

Material Options

Stainless steel 304 or 316 for durability and broad chemical compatibility. HDPE (high-density polyethylene) economical option for many chemicals. FRP for specialty applications. Material selection based on chemical compatibility and service life.

Polymer Preparation

Liquid polymers dilute 0.1-1% active for injection. Dry polymers require aging time 30-60 minutes ensuring complete dissolution. Gentle mixing prevents shear degradation. Batch preparation provides consistent solution.

Coagulant Dilution

Alum or ferric chloride solutions dilute from concentrated form. Dilution enables accurate low-rate dosing. Mixing ensures uniform concentration. Preparation improves injection distribution in treatment process.

Operating Procedure

Fill tank with dilution water. Add concentrated chemical with mixing. Continue agitation for specified aging time. Transfer to dosing system. Batch process ensures quality control before injection.

Capacity Sizing

Volume provides 4-24 hours treatment chemical supply at dosing rate. Typical preparation batches once or twice daily. Balance between tank size and preparation frequency.

Applications

Municipal water treatment polymer and coagulant preparation, wastewater treatment chemical dosing, industrial process water conditioning, and any application requiring diluted chemical solutions for metered injection.

Level Indication

Visual level gauge or transmitter monitors inventory. Low level alarm prevents running dosing system dry. Controllers coordinate with dosing pumps managing chemical feed.

Dosing Integration

Prepared solution feeds metering pumps via gravity or transfer pump. Flow-proportional dosing adjusts chemical feed matching treatment demand. Consistent solution concentration ensures predictable dosing.

Chemical Compatibility

Material selection critical for concentrated and diluted chemical contact. HDPE suitable for most polymers, alum, and caustic. Stainless steel broader compatibility including acids and oxidizers.

Performance Benefits

Ensures complete chemical dissolution maximizing treatment effectiveness. Batch preparation provides quality control. Simple operation with proper mixing. Economical solution preparation versus ready-to-use chemicals.

Construction Standards

Atmospheric tank per applicable standards. Mixer per ANSI/AGMA specifications. Materials verified for chemical compatibility. Proper venting. Complete documentation with preparation procedures and capacities.

ERGIL chemical preparation tanks provide reliable polymer and coagulant dilution ensuring effective treatment chemical dosing in water and wastewater applications.