Used for distillation of liquid or organic preparation, with condensation or reflux effect.

Scope of application: the steam temperature is greater than 140℃ and the temperature is less than 140℃, and the direct condensing tube is used.

Condenser tubes are usually used to reflux experimental flasks or distillation bottles to collect condensed liquid. The condensation of steam occurs on the inner wall of the inner tube. The space enclosed by the inner and outer pipes is a drainage area, which has the function of absorbing steam heat and discharging it. There is usually a high water pressure at the water inlet. In order to prevent water pipes from falling off, plastic pipes should be tied tightly with bundles. When it is used in reflux state, a rubber plug should be inserted into the glass tube at the lower end of the condenser tube so as to be inserted into the bottle mouth and receive the upward evaporated steam in the flask.

Reflux condenser tube

When there are volatile liquid reactants, in order to avoid the loss of reactants and make full use of raw materials, a condensation reflux device should be designed in the generator, so that the substance can be recovered from gas to liquid after condensation, and then collected by reflux. In the laboratory, it can be realized by installing a long glass tube or a condensation reflux tube in the generator. The direct condensing tube is composed of straight glass tubes combined inside and outside, which is mostly used for distillation operation. The steam temperature is less than 140 degrees, so it cannot be used for reflux. The upper and lower sides of the outer tube are respectively provided with connecting pipe joints as a water outlet and a water inlet.

Direct condenser tube

Usage: When in use, connect the connection port near the lower end to the faucet and use the plastic pipe as the water inlet. Because the water temperature at the entrance is low, the temperature of water heated by steam is higher; Hot water will automatically flow upward due to the decrease of density, which is helpful for the circulation of cooling water. Air condenser tube

Air condenser tubes and direct condenser tubes are mainly used for distilling out products (including distillation and fractionation). When the boiling point of distillate exceeds 140℃, air condenser tubes are generally used to avoid glass bursting due to large temperature difference caused by water cooling in straight condenser tubes.

Allen condenser

The inner tube is connected by several glass balls, which is used for the reflux of organic preparations and is suitable for liquids with various boiling points.

After long-term use, the rust in the gasket can be washed off with hydrochloric acid. Disadvantages: condensed liquid is easy to get stuck in the glass ball after solidification. Because of the high water pressure at the water inlet, the hose is easy to fall off, so it should be tied tightly with iron wire when using it.

direct condenser

Reflux of organic preparation, suitable for low boiling point liquid.