Thin film evaporatorProduct Categories:
Sewage treatment equipment / other
Series: Evaporator Product introduction: Scraper film evaporator is suitable for concentrating high-viscosity fruit juice, honey, or liquid containing suspended particles.
The scraper film evaporator is suitable for concentrating high-viscosity fruit juice, honey, or feed liquid containing suspended particles. It is a high-efficiency evaporation and distillation equipment that uses high-speed rotation to distribute liquid into a uniform film for evaporation or distillation. It can also perform unit operations such as deodorization, defoaming reaction, heating, and cooling. , Light industry, petroleum, chemical, environmental protection and other industries.
During the concentration process, the liquid layer is very thin, and the boiling point of the solution can be increased. The residence time of the liquid in the heating zone varies with the height (length) of the concentrator, the guide angle of the scraper, and the speed. Around seconds.
The heating chamber is a jacketed round body, which is designed according to process requirements and processing conditions. When the concentration is relatively large, the length of the heating chamber can be increased, divided into several heating zones, and heated by different pressure heating steam, which is conducive to ensuring product quality.
The inner surface of the heating chamber cylinder must be finished. Ensure that the minimum gap between the scraper and the heating surface is about 1.5 ± 0.3 mm.
Thin film evaporator structure
Scraper type thin film evaporator is composed of a rotating shaft, a material liquid distribution plate, a scraper, a bearing, a shaft seal, an evaporation chamber and a jacket heating chamber. Generally, there are two types: vertical and horizontal.
Vertical scraper film concentrator. Its feed liquid enters from the upper part and the feed pipe at a stable flow rate. It first drives the rotating distribution plate through the rotating shaft. Under the action of centrifugal force, it is thrown to the inner wall of the jacket heating chamber. The material liquid flows downward along the wall of the device under the action of gravity. At the same time, a scraper mounted on the rotating shaft scrapes the material liquid into a thin film, so that the material liquid is heated and evaporated by the heating surface. Due to the gravity and centrifugation of the material and liquid part, the liquid film is constantly updated, and finally flows to the bottom. The secondary steam generated during the concentration process can enter the vapor-liquid separator in the co-current direction with the concentrated liquid, be separated and removed, or rise to the top of the concentrator in the direction of counter current, and the entrained liquid will be rotated through the perforated leaf plate. The foam is separated and discharged from the top and into the condenser.
Thin-film evaporator performance The scraper-type thin-film evaporator equipment adopts a centrifugal sliding groove rotor, which is the latest structured evaporator in foreign countries. It can form a thin film even when the flow is very small. The sludge can be quickly removed by the movable scraper. Compared with a fixed-gap scraper evaporator, the evaporation can be increased by 40-69%. It has the following properties and characteristics:
1. High heat transfer coefficient value, large evaporation capacity, evaporation intensity can reach 200kg / m2 • hr, and high thermal efficiency.
2. The heating time of the material is short, between about 5 seconds and 10 seconds, and it works under vacuum conditions, which is more beneficial to heat-sensitive materials. It keeps the various ingredients from any decomposition and guarantees product quality.
3. It can adapt to a wide range of viscosity changes, both high and low viscosity materials can be processed, and the material viscosity can reach 100,000 centipoise (CP)
4. Changing the rotation direction of the scraper groove can adjust the care time of the material in the evaporator.
5. The inner wall of the tube in the evaporation section is precisely bored and polished, and the surface is not prone to coking and scaling.
6, easy to operate, easy adjustment of product indicators, under closed conditions, continuous production can be controlled automatically.
7, the equipment covers a small area, simple structure, convenient maintenance and easy cleaning.
Thin film evaporator technical parameters
项目型号 Item model
换热面积m2 Heat exchange area m2
蒸汽压力MPa Steam pressure MPa
真空度KP Vacuum degree KP
蒸发量kg/n Evaporation kg / n
能耗kg/n Energy consumption kg / n
电机功率KW Motor power KW
转速rpm Speed rpm
设备高度mm Equipment height mm