The performance and characteristics of the three-effect falling film evaporator: The equipment is suitable for the evaporation and concentration of foaming materials. Since the material liquid evaporates in the heating tube as a film, vapor-liquid separation is formed. At the same time, at the bottom of the effect body, most of the material liquid is After being pumped away, only a small part of the material liquid and all the secondary steam enter the separator to strengthen the separation, and the material-liquid consolidation process does not form too much impact, avoiding the shape of foam. The performance and characteristics of the three-effect falling film evaporator: Since the material evaporates in a film in each tube, the heating time of the material liquid is very short, so it is especially beneficial for the evaporation and concentration of food, and the nutrients of the food are preserved. Under the action of vacuum, the evaporation process not only guarantees the sanitary requirements of the materials, but also guarantees the environmental protection requirements. At the same time, the evaporation temperature is greatly reduced.
With the configuration of the hot pressure pump, part of the secondary steam is re-inhaled and mixed with the raw steam by the hot pressure pump. It not only saves raw steam, but at the same time, because the steam passing through the heat pressure pump enters the heating shell in the form of spray mist, the steam diffuses quickly and the material liquid is heated gently, so it is suitable for the concentration of heat-sensitive materials. Three-effect falling film evaporator, also known as single-effect or multi-effect falling film evaporator, is suitable for low-temperature continuous operation in industries such as milk, glucose, starch, xylose, pharmaceutical, chemical, biological engineering, environmental protection engineering, and waste liquid recovery. It has the main characteristics of high heat transfer efficiency and short heating time of materials, so it is especially suitable for heat sensitive, viscous, foaming and other materials. [url=24/] The entire heating system of the equipment has the main characteristics of high heat transfer efficiency and short heating time due to uniform steam heating and liquid film flow evaporation. If equipped with a heat pump, it has the advantages of energy saving and consumption reduction, low steam consumption and low cooling water circulation. The material is accelerated downward along the inner wall of the tube. Application prospect of falling film evaporator.
What are the characteristics of the falling film evaporation system? What are the characteristics of the falling film evaporation system? The falling film evaporator is suitable for the evaporation and concentration of foaming materials. Because the material liquid evaporates in the heating tube as a film, it forms vapor-liquid separation. At the same time, at the bottom of the effect body, most of the material liquid is pumped away, and only a small part of the material liquid is The secondary steam enters the separator to strengthen the separation, and the whole process of the material and liquid does not form too much impact, and the formation of foam is avoided. Since the process fluid flows only under the action of gravity, instead of being driven by high temperature difference, low temperature difference evaporation can be used. The liquid holdup is small, and the falling film evaporator can adopt rapid changes according to changes in energy supply, vacuum, feed volume, concentration, etc.
What are the characteristics of the falling film evaporator system? Since the solution flows as a film in the single-pass evaporator, the heat transfer coefficient is high. The residence time is short, it is not easy to cause material deterioration, and it is suitable for processing heat-sensitive materials. The feed liquid of the falling film evaporator is added from the top of the evaporator, and falls in a film form along the pipe wall under the action of gravity, and during this process, it evaporates and thickens, and a concentrated liquid is obtained at the bottom. Falling film evaporator can evaporate materials with higher concentration and higher viscosity.
What is the difference between falling film evaporator and ordinary evaporator? Let me remind you that there is a misunderstanding that there is a fundamental difference between the “water-cooled” central air-conditioning of household central air-conditioning and commercial central air-conditioning. The water-cooling (or air-cooling) of water-cooled central air-conditioning in commercial central air-conditioning refers to the cooling method. The fixed home central air conditioner is not because I used to talk to people who have home central air conditioners and always jokes because although it is the same industry, there are still many differences.
Commercial air-cooled central air conditioners have 1 water system (chilled water system). Commercial water-cooled central air conditioners have 2 water systems. One is a cooling water system (flowing through the condenser) and the other is chilled water (falling film evaporator. Application prospects. The material is evenly distributed in the heating tubes of the evaporator by the distribution device, and the material is formed into a film under the action of gravity, vacuum induction and air flow.
It flows from top to bottom, and evaporates by exchanging heat with the heated steam on the outer wall of the heating tube during movement.
Ordinary evaporators have no film forming process, and generally do not perform film falling.
(1) Rising film evaporator: the raw material liquid enters from the bottom of the evaporator, is driven by the second steam, and flows upward along the pipe. Falling film evaporator: the raw material liquid enters from the top of the evaporator and flows down the pipe wall with gravity.
(2) No matter what the evaporator is, it is mainly composed of three parts: heater, main body (for liquid-gas heat exchange), condenser, different companies will make equipment with different shapes and different effects, and there are also accessories Some other control programs and ancillary equipment are mainly the three parts just mentioned.
(3) The film in the rising film and falling film refers to the evaporator during operation. Application prospect of falling film evaporator.