Water ring vacuum distillation recovery Notes

For example, a chemical mixture requires 7m³ reactor was evacuated, and then recovering ammonia and water vapor that ammonia recovery tank for 7m³, heat exchanger area of 15 square meters, the heating temperature is 60 ℃, the need to choose what kind of vacuum pump meet the requirements within four hours of the evaporation of 1-2 tons of material it?

First need to determine the saturated vapor pressure of materials, we see the data and theory through practical application that, as the heating temperature is about 60 ℃, vacuum degree required pumping up 10000Pa (-0.09MPa) so can be distilled out of the material, and therefore the reaction there condensable gases out so choose the most appropriate water ring vacuum pump, then the next need to choose how much of the water ring vacuum pump can both meet the technical requirements and not wasting it?

As we all know, distillation recycling process water ring vacuum pump should be based on the size of the reactor, the size of the condenser recovery tank heater temperature level related to the data provided by the apparent recovery tank reactor condenser plus the maximum volume does not exceed 8-9m³, they need 4 within 1-2 hours to evaporate out of tons of material, you can choose 2BE202 water ring vacuum pump (pumping speed limit for 12-14m³ / min), but the best heat exchanger to cool down the temperature at about 20 ℃ to achieve the desired vacuum effect and make the entire process of improving efficiency.

The recovered water ring vacuum pumps as well as piping and tanks considerations airtightness, local atmospheric pressure, among other factors, the main impact of the above-mentioned distillation recovery process some of the basic factors.

Tend to develop oil diffusion pump characteristics

(1) the use of saturated vapor pressure, good performance of the new working fluid, to increase the ultimate vacuum of the pump. Polyphenylene ethers, polyvinyl ether and the like. Now widely used is a silicone oil.
(2) shortening of the pump start-up time.
(3) expand the range of pressure pumping work abroad between 0.4 ~ 10-8Pa, pumping speed constant.
(4) increase the maximum counter-pressure, foreign better pump discharge pressure between 79.99-106.66Pa.
(5) to improve the structure and improve the pumping speed.
(6) reduce the rate of anti-oil pump. For example, the baffle can apply teflon oil return rate greatly reduced.