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Jingmen high-quality MVR mechanical compression evaporator process

Release time: 2020-01-19 04:49:48

FG series fermentation tank is a kind of equipment for mechanical stirring and fermentation of materials. This equipment adopts internal circulation method, and uses a paddle to disperse and break up the bubbles. It has a high rate of dissolved oxygen and good mixing effect. The tank body is made of SUS304 stainless steel, and the tank is equipped with an automatic spray cleaning head to ensure that the production process conforms to the pharmaceutical GMP standard.

In the multi-effect evaporation process, the secondary steam of one effect of the evaporator cannot be directly used as the heat source of this effect, and can only be used as the heat source of the secondary effect or several effects. For example, as an effective heat source, it must be given additional energy to increase its temperature (pressure). The steam jet pump can only compress part of the secondary steam, while the mvr evaporator can compress all the secondary steam in the evaporator.

There are the following types of high-efficiency evaporators: 1. Rising film evaporator; 2. Falling film evaporator; 3. Scraper evaporator (thin film evaporator); 4. Spray evaporator.

Disadvantages of scraper evaporator: 1. The structure is complex and there are moving parts, so sealing and wear are both issues to be considered; 2. The power consumption is large and the running cost is high; 3. The heat transfer area is small because the end of the blade The clearance with the inner wall of the heating tube is stricter, so the larger the inner wall area, the higher the processing requirements; 4. The processing capacity is small.

Features: high heat transfer coefficient, large evaporation strength, prevention of wall formation and tube blocking, etc. It is especially suitable for materials that generate crystals during evaporation. The separator is equipped with a special defogging device, which can avoid entrainment of running, punching and liquid foam. Configure the online cleaning system to clean the heating pipe regularly. With our patented products, the solid content of the crystal can be as high as 70%. DTB or OSLO separation structure makes the turbid liquid effectively separate and completely avoid crystal particles from entering the heat exchange tube. Realize automatic control and save labor.

The reverse operation is the opposite of the downstream operation. The pre-effect temperature is high, the concentration is high, the post-effect temperature is low, and the concentration is low, so that the heat transfer rate of each effect is close. . It is not suitable for processing heat-sensitive materials, and it is not suitable for materials that have enhanced corrosive properties with increasing temperature and concentration. In addition, it can adopt advection and mixed flow according to the specific conditions of the material.

CSFM is suitable for situations where the boiling point rise (BPE) of the material is not very large, and the design requirements can be met by a single compression of the secondary steam of the MVR. Compared with the CDFM form, the installation space is smaller and the equipment investment cost is lower.

MVR evaporator preheater: In most cases, the solution to be evaporated needs to be preheated before entering the evaporator. Evaporator: The solution to be evaporated is heated in the evaporator and heat source steam to produce evaporation. Choose different types of evaporators according to the properties of different solutions.

The pharmaceutical industry's granules, proprietary Chinese medicine tablets, western medicine tablets and powders have high temperature requirements. Combining MVR evaporation technology and low temperature multi-effect technology, not only achieves energy saving, but also maintains the characteristics of raw materials to meet customer industry upgrades and energy savings. Row of demand.

MVR mechanical compression evaporator is suitable for all kinds of materials for evaporation and concentration crystallization, especially for products whose boiling point rise (BPR) is not very large or thin materials that are easy to evaporate.

In the MVR evaporation system evaporation, the amount of generated steam is very small, so that the original steam to be discarded is fully utilized, and the thermal efficiency is improved. The economics of the generated steam is theoretically equivalent to that of multi-effect evaporation 30 effective, and MVR evaporator does not require large flow of circulating cooling water, and can reduce a large number of supporting facilities (such as large boiler rooms, large cooling water towers), MVR evaporator compact equipment, small footprint, high degree of automation, economical and durable Easy to operate. However, MVR evaporators inevitably suffer from corrosion during cycle operation. The editor summarizes the common corrosion of MVR evaporators as follows: metal corrosion, temperature corrosion, cavitation, high temperature corrosive liquid or steam leakage.