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In the sulphonation system process, the air is generated by a Roots blower; the fan uses an inverter to control the system pressure automatically. The process air is pressurized by a Roots blower and then cooled by a water cooler (circulating water cooling system), followed by a glycol refrigeration liquid cooling system and then into a silica gel drying system. The dew point of the dried process air reaches below -80°C.
The circulating water cooler and glycol cooler are set together with the glycol tank. Silica gel dryer uses two split-type switches, switching pneumatic valve automatic control. Silicone is regenerated by hot air or steam heating. The temperature of glycol is controlled by the chiller system.
The air-drying unit not only requires a lower dew point of the drying air, but also requires that the dew point of the drying air is stable, thereby ensuring that the molar ratio of SO3 to the alkylbenzene is stable, and the sulfonation product has a stable neutralization value and a stable product quality. For this reason, in the design of our sulfonation plant, the heat exchange area of the air cooler is increased, and the volume of the air-drying tank is also increased to make the dew point stable during the dry adsorption work period. The most critical is that the cooling temperature of the desiccant after regeneration is low. Only by ensuring that the initial working temperature of the desiccant after the switching is low can the stability of the desiccant be lowered due to the high temperature of the desiccant after the switching of the drying tank, and the dew point can be significantly increased. We use the appropriate method to increase the refrigeration capacity of the refrigeration unit, so that a part of the chilled water is used for cooling after regeneration, and the desiccant cooling temperature is significantly reduced. The selection of desiccants takes into account the production cost of 80%. The use of silica gel 20% can use molecular sieves or imported silica gel. The regeneration temperature is required to reach 200°C. Therefore, the air cooling section of the SO3cooler adopts series cooling to increase the regeneration temperature and meet the high regeneration temperature required for molecular sieves.
In addition, the automatic switch of the drying tank is set to the control mode of the parallel operation, so that the switch of the drying tank is non-disturbed, and the pressure, temperature, and air dew point at the time of switching will not change, thereby stabilizing the product quality.
In the sulphonation system process, the air is generated by a Roots blower; the fan uses an inverter to control the system pressure automatically. The process air is pressurized by a Roots blower and then cooled by a water cooler (circulating water cooling system), followed by a glycol refrigeration liquid cooling system and then into a silica gel drying system. The dew point of the dried process air reaches below -80°C.
The circulating water cooler and glycol cooler are set together with the glycol tank. Silica gel dryer uses two split-type switches, switching pneumatic valve automatic control. Silicone is regenerated by hot air or steam heating. The temperature of glycol is controlled by the chiller system.
The air-drying unit not only requires a lower dew point of the drying air, but also requires that the dew point of the drying air is stable, thereby ensuring that the molar ratio of SO3 to the alkylbenzene is stable, and the sulfonation product has a stable neutralization value and a stable product quality. For this reason, in the design of our sulfonation plant, the heat exchange area of the air cooler is increased, and the volume of the air-drying tank is also increased to make the dew point stable during the dry adsorption work period. The most critical is that the cooling temperature of the desiccant after regeneration is low. Only by ensuring that the initial working temperature of the desiccant after the switching is low can the stability of the desiccant be lowered due to the high temperature of the desiccant after the switching of the drying tank, and the dew point can be significantly increased. We use the appropriate method to increase the refrigeration capacity of the refrigeration unit, so that a part of the chilled water is used for cooling after regeneration, and the desiccant cooling temperature is significantly reduced. The selection of desiccants takes into account the production cost of 80%. The use of silica gel 20% can use molecular sieves or imported silica gel. The regeneration temperature is required to reach 200°C. Therefore, the air cooling section of the SO3cooler adopts series cooling to increase the regeneration temperature and meet the high regeneration temperature required for molecular sieves.
In addition, the automatic switch of the drying tank is set to the control mode of the parallel operation, so that the switch of the drying tank is non-disturbed, and the pressure, temperature, and air dew point at the time of switching will not change, thereby stabilizing the product quality.
