Qingdao Conqinphi Energy Tech Co Ltd

Qingdao, China

Natural circulation evaporatornatural circulation in an evaporator is caused by the thermal difference between the heating medium and the liquid. This thermal change is called "thermo-siphon action". Sufficient heat must be available to provide the necessary thermal difference to cause circulation.the operation of natural circulation is extremely simple. The body and tubes are partially filled with liquid and steam is admitted to the steam heat. Dilute liquid at the proper temperature is fed to the chamber below the lower tube sheet.when the boiling point is reached, bubbles of vapor are formed in the column of liquid, as they expand and increase in volume they push the liquid ahead with increasing velocity. As the upper part of the tubes is reached, the liquid is either in the form of drops or a film in contact with the wall of the tubes.the mixture of vapor and liquid merges from the tubes and enters the upper chamber from which it passes through a short connection into the vapor separator. Concentrated liquid is removed from the bottom of the vapor separator as a finished product or to serve as feed for another effect.continuous operation is the ideal method of operating an evaporator, but there are processes where batch operation is necessary. The separator can be designed for any required holding capacity. the advantage of natural circulation evaporator:1.batch or continuous operation.2.relatively low retention time. 3.minimum floor space but large amountof heating surface4.minimum maintenance requirements. 5.suitable for recirculation. Natural circulation applications:1.heat-sensitive materials 2.foamy liquids 3.materials requiring sanitary operation4.non-viscous materials 5.non-crystal forming materials

Falling film evaporatorfalling film evaporators offer distinct operating advantages in the concentration of many materials, such as certain food products, fruit juices, pharmaceuticals and similar materials, which are particularly suited to evaporate in this type of equipment.the operation of falling film evaporators embodies a different operating principle from other types. The dilute liquid is fed to the top of the tubes, flows downward as evaporation occurs.uniform distribution of the liquid to the tubes is assured by an exclusive feature which controls the flow of the liquid to the top of the vertical heating tubes. The liquid flows over the edge of the tubes and runs down the inside surface in a thin, uniform film. The vapor travels down the tubes in the same direction as the liquid, gaining in velocity by the addition of more vapor as the mixture descends, resulting in high velocity for both the liquid and vapor.The advantage of falling film evaporator:1.flexible in operation, permitting continuous or batch operation.2.very suitable for multiple effects.3.simplicity of construction permits economical use of corrosion resistant materials.4.handles liquids which increase in viscosity at higher concentrations because the liquid flows as a thin film down the surface of the heating tubes.5.vaporizes viscous materials more readily than a natural circulation evaporation as vaporization takes place from a thin film.6.can be used advantageously with thermal recompression.7.low power requirements.8.low holding volume.9.can be configured as a counter current falling film for stripping application.

Mvr plate type evaporatormvr plate type evaporator is composed of mvr plate evaporator technology coupling plate evaporator conqinphi invented patented technology.if the mvr evaporator heat transfer with small temperature difference, the heat exchange area is large.our company invents the plate type evaporator with large area heat exchange, with higher heat transfer coefficient and the heat transfer area is small, the equipment cost is low.plate evaporator with special plate as heat transfer surface, relative to the tubular heat exchanger has high heat transfer coefficient, easy cleaning, can remove and replace the heat transfer surface of unit area, small power consumption characteristics. The evaporator pump consumes only 1314. Of tubular exchanger. Process: can use type climbing film, plate falling film plate, forced circulationcomposition: filtration system, preheating system, plate heater, material pump, separator, demister, steam washing tower, steam compressor