Zhejiang Meibao Industrial Technology Co., Ltd. is one of the leading manufacturers and suppliers of liquid sodium silicate digester plant in China. With abundant experience, we warmly welcome you to buy custom made liquid sodium silicate digester plant from our factory. For price consultation, contact us.
Product Overview
The Liquid Sodium Silicate Digester Plant is a specialized facility made to produce liquid sodium silicate, also called water glass. This chemical is widely used in detergents, paper, ceramics, adhesives, construction materials, and water treatment. The plant works by reacting silica (SiO₂) with sodium carbonate (Na₂CO₃) or caustic soda (NaOH) under high heat and pressure. The system is designed to keep stable temperature and pressure, so the final product is consistent in quality, with adjustable silica modulus and high purity.
Production Process
1.Raw Material Handling
Silica sand and sodium carbonate or caustic soda are stored in silos or tanks.
Automated dosing systems measure and feed raw materials into the digester.
2.Reaction in the Digester
Raw materials and water are mixed in a high-pressure digester.
Temperature: 150–200°C
Pressure: 6–10 bar
Main reaction:
Na₂CO₃ + SiO₂ → Na₂SiO₃ + CO₂
3.Heat and Pressure Control
Steam provides the heat needed for the reaction.
Built-in safety systems keep operations stable and secure.
4.Filtration and Purification
The liquid product is filtered to remove impurities and undissolved solids.
This step ensures detergent-grade or adhesive-grade sodium silicate.
5.Storage and Handling
The product is stored in insulated tanks at controlled temperature.
Dilution or concentration can be added if required.
Product is delivered in bulk or custom containers.
Key Features
Adjustable silica modulus for different industrial uses.
Safe operation with pressure- and temperature-resistant design.
Automation-ready with PLC, HMI, and monitoring options.
Energy-saving design with low emissions.
Typical Applications
Detergents
Paper and pulp
Adhesives and binders
Ceramics and refractories
Water treatment
Cement and construction
FAQ
1. What raw materials are used?
Silica sand and sodium carbonate are standard. Caustic soda can also be used for special formulas.
2. How does the digester work?
The digester heats raw materials and water under pressure. This drives the chemical reaction that forms liquid sodium silicate and CO₂.
3. Why are temperature and pressure control important?
They ensure full reaction, steady product quality, and safe operation. Steam is usually used to provide heat.
4. What is the role of filtration?
Filtration removes solids and impurities so the product is clean and ready to use.
5. What is the silica modulus?
It is the SiO₂:Na₂O ratio. It affects viscosity, solubility, and bonding strength. It can be adjusted as needed.
6. How is the product stored?
It is stored in insulated tanks at stable temperature to prevent crystallization or viscosity changes.
7. Can the plant be customized?
Yes. It can be designed for different capacities, reaction conditions, automation levels, and silica modulus values.
dulus of sodium silicate.
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