Overview of the current situation

Industrial production can generate certain levels of pollution, especially in the refining, petrochemical, and metal processing industries where emulsified oil, cutting fluid, electroplating fluid, alkaline washing, acid washing, phosphating, etc. are used for production, resulting in a large amount of waste liquid. These waste liquids contain much higher concentrations of pollutants than wastewater, making it difficult to degrade pollutants using conventional sewage treatment processes.

Calidaddelaire Introducing Japan's negative pressure distillation emission reduction technology

Directly helping enterprises reduce outsourcing processing costs

Technical Principles

The boiling point of a liquid varies with external pressure, meaning that boiling occurs when the saturated vapor pressure of the liquid reaches external pressure. Reducing system pressure can lower the boiling point of liquids, allowing them to boil at lower temperatures, which is the principle of negative pressure distillation.

The vacuum pump vacuums to above -90kPa, and the boiling point of the liquid (water) is around 45 ° C. At this temperature, water begins to evaporate into water vapor and is eliminated. Solid substances with boiling points higher than water and insoluble in water remain in the cavity.

Attachment: (Water) Pressure and Boiling Point Comparison Table

Technological process

Use a vacuum pump to vacuum the distillation kettle to above -90Kpa, and the boiling point of water drops to around 45 ℃. When the waste liquid enters the distillation kettle, the water evaporates and condenses at this temperature before being discharged. Solid substances with boiling points higher than water and insoluble in water remain in the distillation kettle and are discharged as residues.

System composition

Use a vacuum pump to vacuum the distillation kettle to above -90Kpa, and the boiling point of water drops to around 45 ℃. When the waste liquid enters the distillation kettle, the water evaporates and condenses at this temperature before being discharged. Solid substances with boiling points higher than water and insoluble in water remain in the distillation kettle and are discharged as residues.

System advantages

System composition

» type of machine：1250 

» maximum throughput：20T/Day 

» concentration ratio：90%

Test data

Benefits Assessment

Note: Unit price details after negative pressure distillation technology: electricity fee of 20 yuan, steam fee of 200 yuan, equipment maintenance and operation management fee of 60 yuan,

          Residue outsourcing5000rmb×10%=500rmb（Concentrated residue10%）

          Taking chemical concentrated hazardous waste as an example, the monthly treatment capacity is 300m3

Scope of application