How to choose the material for a reaction kettle? Under what circumstances is glass lining generally used?
Thread Content
How to choose the material for a reaction kettle? Under what circumstances is glass lining generally used? Under what circumstances can’t it be used?
Acid has strong corrosivity; a glass-lined reactor is used when the pressure is not very high
Corrosion-resistant below 200 degrees, except against F ions
Glass-lined reaction vessels are widely used in industries such as chemicals, petroleum, pharmaceuticals, pesticides, and food. To ensure the proper operation of glass-lined equipment, its main performance characteristics as well as precautions for installation and use are outlined below: Technical specifications for glass-lined reactors: 1. Operating pressure: 0.2---0.4 Mpa. 2. Acid resistance: It exhibits good corrosion resistance against various organic acids, inorganic acids, and organic solvents. If the glass-lined samples produced by our factory are boiled in a 20% HCl solution for 48 hours, the corrosion rate is 0.9 lg/m2.d (the standard for top-quality products is 1.0 g/m2.d). 3. Alkali resistance: Enameled glass has poorer resistance to alkaline solutions compared to acidic solutions. However, our plant’s glass-lined sample was subjected to corrosion in a 1N sodium hydroxide solution at a temperature of 80°C for 48 hours. The corrosion rate is 6.76 g/m2.d (the standard for premium quality is 7.0 g/m2.d). 4. Operating temperature: When heating and cooling glass-lined equipment, it should be done slowly. The glass-lined equipment manufactured by our factory can operate at temperatures ranging from 0 to 200°C, with a tolerance to sudden temperature changes of ≥200°C. 5. Porcelain layer thickness: The porcelain layer thickness in glass equipment is 0.8–2.0 mm, while that in accessories for glass-lined equipment is 0.6–1.8 mm. 6. Voltage resistance: Enameled glass possesses good insulation properties; when the ceramic layer is tested using 20 KV high-frequency electric sparks at a specified thickness, these sparks are unable to penetrate the ceramic layer. 7. Impact resistance: The lower the internal stress in the glass layer, the better its elasticity; the higher its hardness, the greater its bending and compressive strength, and thus the better its impact resistance. For the glass layer in our factory, when impacted by a steel ball with a diameter of 30 mm and a weight of 112 g within the specified thickness, the impact energy is 282×10-3 J (the standard for top-quality products is 260×10-3 J). Precautions for using glass-lined reactors: Glass lining is widely used in the chemical industry, but due to factors such as the corrosiveness of the media, fluctuating reaction conditions, transportation issues, handling problems, and human error, various damages to the glass lining can occur, leading to unnecessary production disruptions. In cases of large-scale peeling, it is recommended to return the reactor to the manufacturer for re-glass lining. Enameled reactors are expensive, and it is not necessary to replace the entire unit when there is only minor damage. Therefore, it is important to choose an appropriate repair method and use JS916 from JinSuCheng to carry out repairs promptly; otherwise, the reactor will be corroded by the solvents inside it, the damage to the enamel surface will spread rapidly, leading to unexpected losses such as production shutdowns, safety accidents, and environmental pollution.
Enameled steel is widely used, but it is relatively delicate and not resistant to impacts or temperature fluctuations. However, it offers excellent cost-performance in acidic and alkaline environments. In the absence of special corrosive agents, it is recommended to use a stainless steel reactor.
The pressure should not exceed 0.4 MP, and there should be no sudden changes in the temperature inside the reactor. Our company uses dilute sulfuric acid as a catalyst for its synthesis processes, and we employ enamel-lined reactors for these purposes.
The pressure should not exceed 0.4 MP; there should be no sudden changes in the temperature inside the tank, with the maximum temperature not exceeding 120 degrees℃
The pressure should not exceed 0.4 MP; there should be no sudden changes in the temperature inside the tank, with the maximum temperature not exceeding 200 degrees. It offers excellent cost-performance in acidic and alkaline environments, and it is also easy to clean – although it is not resistant to impacts.
The pressure should not exceed 0.4 MP; there should be no sudden changes in the temperature inside the tank, with the maximum temperature not exceeding 200 degrees. It offers excellent cost-performance in acidic and alkaline environments, and it is also easy to clean – although it is not resistant to impacts.
The pressure should not exceed 0.4 MP; there should be no sudden changes in the temperature inside the tank, with the maximum temperature not exceeding 200 degrees. It offers excellent cost-performance in acidic and alkaline environments, and it is also easy to clean – although it is not resistant to impacts.
The pressure should not exceed 0.4 MP; there should be no sudden changes in the temperature inside the tank, with the maximum temperature not exceeding 200 degrees. It offers excellent cost-performance in acidic and alkaline environments, and it is also easy to clean – although it is not resistant to impacts.