Automatic Powder Dissolving & Dosing Units from TNW Co., Ltd — Save Chemicals & Labor

Automatic Powder Dissolving & Dosing Units from TNW Co., Ltd — Save Chemicals & Labor

Powder flocculants like PAM and PAC are essential for municipal wastewater plants, food slaughterhouses, printing & chemical factories, sand washing and river sludge dewatering projects. Many factories still rely on simple manual mixing barrels, bringing persistent headaches: undissolved powder lumps reduce flocculation efficiency; inconsistent liquid concentration causes either unqualified effluent or excessive chemical waste; full-time staff are required around the clock with high night-shift labor costs; caked chemicals clog metering pumps and pipelines, triggering frequent shutdowns that disrupt the whole water treatment line.

TNW Co., Ltd independently develops integrated three-chamber automatic powder dissolving and dosing units to resolve mixing and dosing troubles once and for all. The equipment covers full procedures including powder feeding, pre-spray dissolution, low-speed curing, liquid storage and precision metering. It can be electrically linked with TNW screw presses, DAF units and mechanical bar screens, and has been widely adopted in thousands of wastewater projects by general contractors and manufacturers.

1. Three-Stage Overflow Structure Eliminates Powder Caking & Incomplete Dissolution

Low-cost single or double-tank devices lack staged curing, leading to massive undissolved lumps and pipeline blockages. TNW’s three-chamber design (dissolving tank, curing tank, storage tank) follows scientific polymer dissolving rules:

Sealed silo with atomized pre-wetting feeding

A fully enclosed powder hopper paired with a variable-frequency spiral feeder sprays atomized water at the discharge port to moisten powder evenly before it enters the dissolving tank, avoiding dry agglomeration. Interlocked water inflow and feeding speed maintain stable 0.1%–0.3% solution concentration free of human error. A vibration arch-breaker ensures smooth feeding even in humid southern workshops without dust pollution.

Differentiated stirring preserves polymer activity

Medium-speed mixing in the dissolving tank disperses powder; low-speed paddle stirring in the curing tank lasts 30–90 minutes to unfold PAM molecular chains without shear damage. Only fully cured liquid overflows to the storage tank for dosing, cutting PAM consumption by 20%–30% compared with manual mixing systems.

Overflow circulation & liquid level linkage for uninterrupted supply

High, low and ultra-low liquid level sensors auto-start dissolving at low levels and shut down when full. Dissolving, curing and storage run simultaneously to produce qualified liquid unattended day and night, eliminating shutdowns caused by chemical shortage.

2. Intelligent PLC Linked Control Adapts to Fluctuating Water Quality & Flow

Manual dosing cannot respond to real-time variations in water and sludge flow. TNW’s integrated dosing units adopt variable-frequency PLC control for closed-loop automatic operation:

Linkable with inlet flowmeters, TNW screw presses and DAF units. The system automatically adjusts powder feeding and metering pump frequency according to water turbidity and sludge density, removing frequent on-site manual parameter tuning.

Full sound-light alarm protection for powder shortage, water cut-off, pump overload and low liquid level. Auto-shutdown protects pumps and pipelines for safe overnight unattended operation.

Compact integrated skid-mounted design with standardized pipelines, mixers, metering pumps and electric controls. No large civil works required for old workshop retrofits; the unit starts operation after simple water and power connection to shorten commissioning time greatly.

3. Customized Materials for Neutral & Strongly Corrosive Working Conditions

TNW offers tiered material options to balance service life and budget:

Thick anti-corrosion PP: Ideal for municipal and food wastewater with PAC and common cationic PAM, cost-effective for mild corrosion.

Full 304 stainless steel (mainstream model): All wetted tanks, paddles and pipelines made of 304 stainless steel, suitable for printing, sand washing and machining wastewater with over 8 years of service life.

316L stainless steel heavy anti-corrosion model: For chemical, electroplating, pickling and coastal high-salinity facilities. Passivated welds resist acid, alkali and chloride erosion for acidic powder chemicals and heavy metal capture agents.

Heat tracing insulation is optional for northern cold workshops to prevent liquid freezing and pipeline blockage in winter.

4. Wide Application for All Industrial Powder Dosing Scenarios, Superior Complete Set Matching

TNW integrated powder dissolving and dosing units fit most water treatment powder feeding demands:

Sludge dewatering: Cationic PAM matched with screw presses for municipal, food and river dredging sludge.

Wastewater pretreatment: Anionic PAM and PAC for DAF and sedimentation tanks to remove oil and suspended solids.

Chemical & electroplating wastewater: Automatic dissolving of acid-base neutralizer and heavy metal capture powder.

Circulating water system: Continuous preparation of lime, scale inhibitors and disinfection powder to restrain pipeline scaling and algae growth.

Most engineering clients purchase full bundled packages: dosing unit + rotary bar screen + DAF + screw press. All linkage parameters are pre-calibrated at the factory to avoid repeated debugging with multiple suppliers and shorten project cycles.

5. Direct Factory Supply, Transparent Quotations & Full-Cycle After-Sales Support

Most market dosing equipment is OEM-assembled by traders with poor spare part compatibility and delayed after-sales service. TNW owns complete production lines for sheet metal welding, assembly and full-load water testing, manufacturing all dissolving and dosing units in-house without outsourcing:

Bulk raw material procurement eliminates 20%–40% middleman markup. Detailed quotations clearly list plate thickness, motor brands, pump models and warranty coverage with no hidden charges.

Free pre-sales services: On-site workshop dimension survey, free lab water/sludge sample testing for customized chemical ratios and equipment specifications, plus detailed quotation proposals.

Complete after-sales guarantee: Nationwide technicians conduct on-site installation, linkage commissioning and hands-on operator training for routine inspection, troubleshooting and chemical mixing adjustment. Core components (stirring motors, metering pumps, PLC controls) carry a 12-month warranty, with genuine wear parts supplied long-term at factory cost to avoid unavailable overpriced spare parts and disconnected after-sales service.

Practical Selection Tips to Avoid Pitfalls

Choose three-chamber staged curing models for long-term PAM dosing; single/double-tank units lead to persistent high chemical waste due to insufficient curing time.

Prefer stainless steel units for printing, chemical and coastal saline wastewater; PP material ages and leaks quickly under acid-alkali exposure.

Purchase matching dosing units together with screw presses or DAFs from TNW for perfect linkage and stable flocculation/dewatering results.

Select full-automatic PLC linked versions for 24-hour continuous operation to cut long-term labor and chemical costs.

Conclusion

Powder dissolving and dosing is a core auxiliary link of the whole water treatment process. The performance of automatic powder dissolving and dosing units directly determines effluent compliance and annual labor & chemical expenses. Cheap simple assembled mixing barrels save little upfront cost yet bring heavy hidden losses from excessive chemical consumption, frequent maintenance and production shutdown rectification.

TNW integrated automatic powder dissolving and dosing units adopt mature three-stage dissolving technology, deliver precise intelligent metering and dosing, and provide optional anti-corrosion wear-resistant materials. They meet powder preparation and dosing requirements across municipal, food, printing, chemical and sand washing industries, applicable for new wastewater projects and upgrades of outdated manual mixing equipment.

Share your daily chemical consumption, wastewater quality and dosing workshop dimensions with TNW technical staff for free customized equipment selection schemes and accurate factory quotations.