Caustic Soda Dissolving System
Buying liquid caustic by tanker can be expensive, and supply is not always reliable at remote sites. A caustic soda dissolving system lets you buy solid sodium hydroxide (NaOH) instead and make your own caustic solution on site, at the concentration your process needs.
Solid caustic in flake, bead, pellet or powder form is fed from bags or bulk bags into a stainless steel tank and dissolved in water under control. Dissolution is strongly exothermic, so solution temperature can reach about 203°F (95°C). Engineered cooling, temperature and level instrumentation, and separation of the operator from the reaction zone manage that heat safely. The system suits water and wastewater treatment, pH neutralization, pulp and paper, mining and gold processing, chemical manufacturing and CIP cleaning.
Caustic Soda Dissolving System - Benefits
A caustic soda dissolving system safely prepares sodium hydroxide (NaOH) solution from solid flakes, beads or pellets. On-site preparation gives you flexibility, reduces handling risks and lowers dependence on liquid caustic deliveries.
Enhanced Operator Safety −
Enclosed feeding and automatic dissolving limit operator contact with caustic.
Consistent Solution Quality +
Reduced Supply Dependency +
Improved Process Efficiency +
Lower Chemical Handling Requirements +
Flexible Industrial Application +
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Contact us todayCaustic Soda Dissolving System - Features
The caustic soda dissolving system prepares NaOH solution from solids with automatic feeding, mixing and temperature management. Storage, dosing and material handling options are configured to your process.
- Automated Caustic FeedingSafely transfers solid NaOH into the tank.
- Stainless Steel ConstructionCorrosion-resistant construction for long life.
- Integrated AgitationEnsures fast and complete dissolution.
- Temperature & Safety MonitoringTemperature, level and overflow protection.
- Flexible ConcentrationProduces 20–50% NaOH solutions.
- Modular System DesignIntegrates feeding, storage, filtration and dosing.
Caustic Soda Dissolving System - configuration
Caustic soda dissolving systems come in several configurations for feeding, dilution, dosing and handling. Each is sized to your capacity, automation level and downstream process.
Caustic dissolving system with dosing unit −
An integrated dosing unit transfers the prepared caustic solution and meters it accurately into the downstream process.
Caustic dissolving system with dilution unit +
Caustic dissolving system with liquid filling system +
Caustic dissolving with big bag discharger +
Caustic dissolving with semi-automatic bag opening +
Safety-Focused Caustic Dissolving Design
The feed system is physically separate from the dissolving tank, so operators stay outside the hot reaction zone. Standard equipment includes a stainless steel dissolving tank of about 265, 530, 790 or 1,320 gallons (1,000–5,000 L), an industrial agitator, a hopper and screw feeder, temperature and level instruments, and a guard frame to prevent accidental contact.
Main Components
A complete automatic caustic soda make-down line can include a bulk bag discharger or bag dump station, a stainless screw conveyor, the corrosion-resistant mixing tank and agitator, a cooling system, instruments and safety valves, a transfer or recirculation pump, and a drum or IBC (tote) filling station.
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Options and Automation
Options include transfer pumps to storage tanks, hopper covers with dust extraction, a dilution station that cuts 50% solution down to working strength, a liquid dosing system for feeding the finished solution, and PLC control with recipe-based concentration setpoints.
Frequently Asked Questions
It is an automated process unit that dissolves solid sodium hydroxide flakes, beads or pellets in water to produce caustic solution at a controlled concentration, safely and on site.
It lets a plant make its own NaOH solution, reducing dependence on liquid caustic supply, lowering storage needs, improving flexibility and keeping solution quality consistent.
Solid caustic is fed automatically into a tank and mixed with water. An agitator dissolves it uniformly, while temperature monitoring and cooling manage the heat released by the exothermic reaction.
Typical systems produce solutions from about 20% to 50% NaOH, depending on process needs.
Benefits include safer chemical handling, consistent concentration, fewer chemical deliveries, lower operating cost, automatic operation and better process reliability.
Users include chemical plants, municipal and industrial water treatment, food processing, pulp and paper mills, mining and precious metal processing, refineries and industrial cleaning operations.
Enclosed feeding, automatic dosing, controlled mixing and guarding keep operators away from corrosive solids and hot solution.
Yes. Bag dump stations, automatic bag openers and bulk bag dischargers can feed solid caustic into the system with minimal manual handling.
We need the required NaOH concentration, daily or hourly capacity, raw material form, water quality, operating temperature, storage needs and plant layout.
