A Study On A New Type Of Rotary Evaporator
Dec 14, 2023
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The working principle of the new rotary evaporator is based on the heat transfer principle of the rotary evaporator. It consists of a porous spiral longitudinal axis and a concentric cylindrical shell. No matter homogeneous or heterogeneous materials, they are forced to be added into the evaporator under internal and external conditions. A small number of scrapers in the cylinder can expand the uniform flow film on the inner wall of the cylinder and develop into a very thin liquid-liquid film. Together with the coagulation, sedimentation and separation line formed by the bath bottom rod on the mechanical hanger left on the outer side of the cylinder, the working process of the rotary evaporator is started.
Heat transfer is one of the important working principles of rotovap. This working principle is based on the fact that there are countless tiny liquid film layers in the equipment. These liquid film layers have the same thickness. This enables external media-for example, another gas, hot gas, water, etc.-to easily penetrate the film and exchange heat with it. In this process, both of them change state at the same time due to the exchange of heat. This is one reason why we can upgrade the mixture in the stock solution with a rotary evaporator.
Rotary evaporator equipment is mainly used for concentration, crystallization, drying, separation and solvent recovery in pharmaceutical, chemical and biopharmaceutical industries. Its principle is that under the vacuum condition, the rotary bottle is heated at a constant temperature, so that the material rotates at a constant speed, and a large-area film is formed on the bottle wall, which is evaporated efficiently. Solvent vapor is cooled by high-efficiency glass condenser and recovered in the collection bottle, which greatly improves the evaporation efficiency. It is especially suitable for the concentration and purification of biological products that are easily decomposed and denatured at high temperature.
New functions of new chemical rotary evaporator
Anti-scald
- Heat insulation layer: Heat insulation layer is set inside the equipment to reduce heat conduction to the external surface. This can be achieved by adding thermal insulation materials to the equipment wall or adopting multi-layer structure.
- Cooling system: Equipped with cooling system, which can take away heat by circulating water or other cooling media to reduce the temperature of equipment. This can reduce the external surface temperature, thus reducing the risk of burns.
- Temperature monitoring and control: Built-in temperature sensor and control system can monitor the temperature of the equipment in real time and control the heating power to ensure that the equipment operates in a safe temperature range.
Anti-dumping
- Base design: Widen and reinforce the base, increase the supporting area of the equipment on the ground and improve the stability.
- Anti-dumping device: Built-in dumping sensor and control system, once the dumping situation is detected, the alarm or automatic stop function will be triggered in time to avoid accidents.
Splash prevention
- Sealing system: adopt sealing design, such as sealing ring, gasket, etc., to ensure that the inside of the equipment is isolated from the external environment and reduce the possibility of liquid splashing.
- Splash collection device: Splash collection devices, such as cover plates and collection tanks, are installed inside the equipment, which can collect liquid spills in time to prevent environmental pollution and damage to the equipment.
Antifoaming
- Liquid level control: A liquid level control device is installed inside the equipment, which can adjust the liquid level in time to avoid foam generated by too deep or too shallow liquid level.
- Gas nozzle: The gas nozzle is arranged inside the equipment, which can inject gas into the liquid and destroy the formation and accumulation of foam.
Anti-suction
- Non-return valve: A non-return valve is set inside the equipment to prevent the liquid from reversely flowing into the feed pipeline during backward suction.
- Backdraft valve: Backdraft valve is set inside the equipment. When the liquid is backdraft, it will automatically close the valve to prevent the liquid from flowing backwards.
The various protective functions of the new rotary evaporator can be applied to the production process of many industries. The following will introduce the applicable industries and production processes according to different protective functions.
Anti-scald function
The anti-scald function of the new rotary evaporation is mainly realized by heat dissipation and temperature control of the shell, which is suitable for industries that need to deal with high-temperature solutions or gases, such as chemical industry, pharmacy, food processing and so on. Among them, the following are specific application scenarios:
Chemical industry: Various chemicals need to be heated and treated in the production process, and the scald prevention function can protect the safety of operators.
Pharmaceutical industry: Some drugs can only get good results at high temperature, and the scald prevention function can ensure the quality and stability of products.
Food processing industry: In the processing of canned food and jam, high-temperature sterilization is involved, and the scald prevention function can ensure the safety of production and operation.
Anti-dumping and splash function
The anti-dumping and anti-splashing functions of the new evaporators are mainly realized through structural design and internal devices, which are suitable for industries that need to deal with materials that are easy to dump and spill, such as chemical industry, pharmacy, coatings and so on. Among them, the following are specific application scenarios:
Chemical industry: When processing and storing chemicals, the anti-dumping and splashing functions can avoid safety accidents caused by improper operation or equipment failure.
Pharmaceutical industry: In the pharmaceutical process, some drugs are easy to pour and spill, and the anti-dumping and splashing functions can ensure the quality and stability of products.
Coating industry: In the coating process, the anti-dumping and splash functions can protect the health and safety of operators.
Anti-foam and anti-suck function
The anti-foaming and anti-sucking functions of the new rotary evaporator are mainly realized by internal structure and control parameters, and it is suitable for industries that need to deal with liquids that are easy to foam and suck back, such as chemical industry, food processing and medicine. Among them, the following are specific application scenarios:
Chemical industry: In the process of chemical reaction and solvent recovery, some chemicals may produce foam and backward suction. The functions of anti-foam and backward suction can ensure the stability of the reaction process and the safety of equipment.
Food processing industry: During the processing of beverages, fruit juice and other foods, a large amount of foam may affect the production efficiency, and the anti-foam function of the rotary evaporator can improve the production efficiency.
Pharmaceutical industry: In the pharmaceutical process, some drugs may be foamy and suck back. Anti-foaming and suck back functions can ensure the stability and qualified rate of drugs.
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