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What are the working principles and characteristics of explosion-proof rotary evaporators?
Date: 2025-09-11Read: 5
Explosion proof rotary evaporator is a laboratory equipment designed specifically for flammable and explosive environments. Its core working principle is similar to that of ordinary rotary evaporators, but safety is ensured through special structural design. The following is a detailed analysis:
1、 Working principle
1. Reduced pressure evaporation: Under vacuum conditions (usually 400-600 mmHg), the solvent is rapidly evaporated at low temperatures by heating a rotating bottle with a constant temperature water bath.
2. Thin film evaporation: The motor-driven distillation flask rotates at 50-160 revolutions per minute to form a uniform thin film on the bottle wall, significantly increasing the evaporation area.
3. Explosion proof design: Adopting explosion-proof shell (explosion-proof grade dIIBT4), explosion-proof motor and electrical control box to avoid explosion caused by electric sparks.
2、 Core Features
1. Security protection
Fully enclosed explosion-proof structure, including explosion-proof switches, cable explosion-proof pipes, and double fuse protection.
The sealing system adopts PTFE+fluororubber composite material, which is corrosion-resistant and maintains high vacuum degree.
2. Efficient performance
Vertical serpentine condenser (some models with dual condenser design), with higher solvent recovery rate.
Support continuous feeding and discharging, and the vacuum state can be switched during operation.
3. Durable material
The contact parts are made of high borosilicate glass (GG-17) and polytetrafluoroethylene, which are resistant to high temperatures and corrosion.
The main bracket is made of stainless steel and aluminum alloy, which combines strength and lightweight.
Explosion proof rotary evaporators are suitable for the concentration and purification of flammable solvents in fields such as medicine and chemical engineering, especially for the treatment of high-temperature and easily decomposed biological products.
