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Multi-stage Distillation Tower

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Overview

In the field of waste liquid recovery of organic solvents in the chemical industry, the separation process of various mixed solvents has always been an important research topic. Looking at relevant domestic and foreign literatures, how to completely separate various mixed solvents has always puzzled experts engaged in the research of distillation technology. At present, in the field of distillation in China, many separation technologies have been invented, but they all have certain limitations. For many solvents, only a few selective solvents can be separated, and none of them can achieve the final ideal effect. The traditional solvent separation and recovery equipment has a tall and heavy tower, occupies a large area and space, has a too high initial cost, a large and cumbersome manual operation range, and the separation effect is not ideal. Based on years of design and operation experience and combined with the needs and wishes of customers, a new type of series – connected multi – stage distillation solvent recoverer suitable for the separation, recovery and reuse of various solvents is designed with the multi – stage distillation principle as the theoretical basis. This equipment solves the limitations of solvent recovery to a large extent. The series – connected multi – stage distillation solvent recoverer has the characteristics of compact structure, low initial cost, small floor area, low space occupation, small manual operation range, and simple operation. The biggest advantage of this equipment is that it can separate solvents without a too high distillation tower body, and the purity is higher than that of traditional equipment. This equipment is particularly ideal for the recovery of methanol and ethanol, which have a wide range of uses. There is no need for forced reflux or liquid level difference reflux; instead, the internal reflux method is adopted, and the reflux effect is obvious. Generally, the alcohol content can reach more than 95%.

 

The equipment also adopts the distillation method, but it is not single – tower distillation, but adopts the method of two – stage heating and three – stage distillation. Through calculation, the number of theoretical plates of the packing in the first tower is equivalent to 1.5 times that of the rough distillation section of the traditional tower, and 1.5 times that of the theoretical plates of the latter two – stage distillation towers. In addition, in the separation chamber, a patented technology device is specially designed based on years of actual design experience. Therefore, the use effect is much better than that of the traditional alcohol recovery tower.

 

The series – connected multi – stage distillation solvent recoverer has two models. One is the external – circulation multi – tower distillation recoverer, which integrates multiple towers and multiple effects. It can not only concentrate various materials under vacuum conditions but also recover various single solvents or multiple solvent media with different boiling points and densities while concentrating. This equipment has high work efficiency, a wide range of uses, and relatively high recovery purity. The other is the internal – circulation solvent recoverer, which is specially used for the separation and recovery of distillation of various high – and low – concentration inorganic and organic solvents, such as water mixtures, ethanol, methanol, ether, ethyl acetate, n – butanol, ethyl acetate, butyl acetate, brass, acetone and many other organic solvents.

Characteristics

  1. Using precision packing and multi – stage distillation principles, the height is reduced by more than 60%. That is, the traditional distillation equipment must have a range where the ethanol concentration can reach at most about 95% when the tower height is above 12 meters. However, this new – type equipment only needs a tower height lower than 3 meters to recover ethanol to reach more than 95%. It not only saves nearly 60% of the space but also reduces the labor intensity of personnel. During the operation of the equipment, operators do not need to climb high; they can operate freely on the ground, saving time and effort. For the series – connected multi – stage distillation solvent recoverer with full – automatic control, operators only need to monitor in front of the computer to master the entire operation process.
  2. Due to the unique and ingenious design, the manufacturing raw materials are saved by about 20% compared with traditional distillation equipment. The equipment is light, beautiful, easy to install and flexible, and convenient to transport. The same specification saves about 60% of space compared with traditional distillation equipment, and the floor area is reduced by more than 30%. It is especially suitable for production workshops with small spaces. However, traditional distillation and distillation equipment are tall and heavy, consume materials and energy, have a low recovery rate, and poor recovery purity. Therefore, this series – connected multi – stage distillation solvent recoverer is a better choice to completely replace traditional distillation and distillation equipment at present.
  3. Compared with the newly invented permeable filtration membrane, the series – connected multi – stage distillation solvent recoverer has seven advantages: low cost, long service life, no easily damaged parts, wide application range, easy cleaning, no blockage, and easy maintenance. The newly invented permeable filtration membrane can only perform a selective single dehydration process and cannot separate multiple groups of organic solvents. It is difficult to clean after use, has a high raw material cost, is easy to damage, is easy to block, cannot be maintained, and the pre – process treatment of solvents is complicated and needs to be replaced frequently. Therefore, the series – connected multi – stage distillation solvent recoverer is a new – generation distillation recovery equipment that traditional distillation and distillation equipment and new – type permeable filtration membranes can never match or surpass.
  4. The series – connected multi – stage distillation solvent recoverer adopts two energy – saving methods for heating steam. One is the series connection method, that is, the condensed water generated during the heating process is not directly discharged but is introduced into the second reboiler for waste heat reuse by using the step – type temperature difference principle. The other is to heat the solvent by using the heat coupling principle combined with the step – type temperature difference principle, that is, using the steam generated by the high – pressure tower to heat the solvent of the low – pressure tower. The combination of the two principles not only saves the original steam but also saves the circulating cooling water, achieving a two – for – one effect. Actual experiments have proved that compared with traditional distillation and distillation equipment in the heating process, the first method can save about 20% of steam, and according to different processes, the second method can save about 30% of steam compared with traditional distillation and distillation equipment in the heating process. This is also what traditional distillation and distillation equipment cannot achieve.

Specifications

Specifications
CLRMHS – 50 – 00
CLRMHS – 100 – 00
CLRMHS – 150 – 00
CLRMHS – 200 – 00
CLRMHS – 250 – 00
CLRMHS – 300 – 00
CLRMHS – 350 – 00
CLRMHS – 400 – 00
CLRMHS – 450 – 00
CLRMHS – 500 – 00
CLRMHS – 600 – 00
CLRMHS – 700 – 00
CLRMHS – 800 – 00
CLRMHS – 900 – 00
CLRMHS – 1000 – 00
CLRMHS – 1500 – 00
CLRMHS – 2000 – 00
CLRMHS – 2500 – 00
CLRMHS – 3000 – 00
CLRMHS – 3500 – 00
CLRMHS – 4000 – 00
CLRMHS – 4500 – 00
CLRMHS – 5000 – 00

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