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Under decompression, it is usually used to separate substances easily decomposed at atmospheric pressure to boiling point or to combine with other distillation methods, such as steam distillation, to reduce distillation temperature and improve separation efficiency. The separation and purification of metal alkoxide. Vacuum distillation is also used for the deep purification of certain kinds of special gases. Some compounds have high boiling points. To boil these compounds, it is best to reduce the pressure of the compound to boil, not to raise the temperature. Once the pressure is reduced to the vapor pressure of the compound (at a certain temperature), the compound begins to boil, and the distillation can be carried out. This technique is called vacuum distillation and is common in the form of a vacuum vaporizer in the laboratory. This technology is very useful for compounds with boiling point above their decomposition temperature under atmospheric pressure, and attempts to make them boil down at atmospheric pressure will cause them to decompose.

Distillation and separation method of oily wastewater

Industrial water recycling rate is an important index of eco city construction in our country, but also to measure the performance of local officials of the "green index", has been the standard or industry wastewater treatment mandatory into many developed areas; in the water and other resources shortage and environmental pollution increasingly urgent situation, the development trend of major industry wastewater treatment is the water and pollutants as a useful resource recycling and closed cycle. It can be divided into comprehensive water recycling and reuse of pollutants, water pollutants and their individual recycling. The structure of filter system, heating system, cooling system, control of distillation separation system, collecting and discharging system, function or oil industry wastewater by distillation method, the decomposition of about 95% water and 5% oil.

Method of separation of oily wastewater by vacuum distillation, distillation, concentration of pollutants out of 5% cold treatment to exclude condensation, distilled water by 95%, to achieve waste water, zero emissions, zero pollution. In order to solve the above problems, the invention realizes the distillation separation method of oil containing wastewater by the following scheme, the steps of the method include the following steps:

1. Vacuum evaporation is used for vacuum evaporation of industrial waste water, and the water in the wastewater is vaporized into gas.

2, distillation treatment, condensation process, for the liquefied gas evaporation after distillation, separated by condensation water treatment, distilled water 90% -95% before entering the major recycling industry;

3. Concentrate the pollutants. After the wastewater is evaporated, the remaining pollutants are concentrated, and the waste of 5% -10% is concentrated.

4, the pollutant discharge, the concentrated pollutant discharge. In step 2, the distillation processing method for distillation, vacuum evaporation of liquefied gas by distillation condensed into distilled water through the filter in super ultra filtration, distillation of 90% -95% water condensed discharge, while reducing nearly 95% of the waste, and kill bacteria, reduce odor spread, will clean water before entering the industry cycle. In step 3, we concentrate the pollutants and concentrate the waste of 5%-10%. The wastes are filtered and separated out of the waste gas. Finally, the waste is discharged to achieve zero emission effect.

The results are as follows:

1, breakthrough "zero liquid discharge", "zero pollution";

2, treatment cost reduction, clean water treatment process to produce clean water. No sewage discharge, no need to be put on record in the government department.

3, wastewater by vacuum evaporation, concentration of 5% -10% and 90% -95% of the waste water discharged from the distillation condensation, reduction of nearly 95% of the waste, and kill bacteria, reduce the spread of odor. 95% of the water resources are recycled and reused, and only 5% of the wastewater is concentrated.

4, low temperature, vacuum state evaporation and concentration, environmental safety design, the realization of 24 hours full automatic operation, automatic cleaning function.