Sodium silicate plant turnkey supplier
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Keywords:
ENGINEERING CASE
Raw Material Chemical Industry
sodium silicate plant
Product details
Hangzhou ASIA Chemical Engineering Co., Ltd. is one of the most reliable manufacturers and suppliers of liquid sodium silicate digester plant in China. Please rest assured to wholesale cost-efficient liquid sodium silicate digester plant from our factory. Good service and reasonable price are available.
Raw Material Handling and Preparation
The key raw materials for liquid sodium silicate production are silica (SiO2) and sodium carbonate (Na2CO3). The plant typically stores these materials in silos or tanks. The materials are carefully measured and transported into the digester, which is a pressurized reactor where the chemical reaction takes place. In some processes, caustic soda (NaOH) may also be used as a substitute for sodium carbonate to alter the properties of the final product.
Chemical Reaction in the Digester
The core of the process takes place in the digester, a large, high-pressure reactor. Inside the digester, the raw materials are mixed with water and heated to very high temperatures, typically between 150°C to 200°C, under pressure ranging from 6 to 10 bar. During this stage, the silica reacts with sodium carbonate or sodium hydroxide in a controlled manner to produce sodium silicate. The reaction can be represented by the following chemical equation:
Na2CO3 + SiO2 → Na2SiO3 + CO2
The resulting product is a sodium silicate solution. The properties of this solution, including its concentration and ratio of sodium oxide to silica, can be adjusted depending on the requirements of the final product. These ratios, commonly referred to as the "silica modulus," determine the viscosity, solubility, and chemical reactivity of the liquid sodium silicate.
Heat and Pressure Control
The production process in the digester is highly dependent on maintaining precise control of temperature and pressure. Heating is typically achieved through steam, which is introduced into the system to maintain the necessary high temperatures for the reaction to occur. The digester must be robust and designed to withstand high pressure and temperature conditions to ensure the safety and efficiency of the operation. Efficient cooling mechanisms are also in place to lower the temperature of the product after the reaction is completed.
Filtration and Purification
Once the chemical reaction in the digester is complete, the liquid sodium silicate is typically filtered to remove any undissolved solids or impurities that may have remained from the raw materials. Filtration systems ensure that the final product is pure and free from particulate matter, which is critical for applications where high purity is required, such as in the detergent or adhesive industry.
Storage and Handling
After filtration, the liquid sodium silicate is pumped into storage tanks where it is kept at a controlled temperature to prevent solidification or changes in viscosity. These storage tanks are often insulated to maintain the solution in its optimal liquid form. Depending on customer requirements, the liquid sodium silicate may be further diluted or concentrated before being transferred into shipping containers or directly to customers in bulk.
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