Operation process of film falling film evaporator

Operation process of film falling film evaporator

The film falling film evaporator unit is composed of three parts of an evaporator, a vapor-liquid separator and a preheater, and a simple separator, and the evaporator is a rising film type tube heat exchanger. According to film formation reasons and flow direction, it can be divided into three types: rising film evaporator, falling film evaporator/scratch film evaporator.

The film falling film evaporator is a type of evaporator, which is characterized in that the material liquid flows along the wall of the heating pipe to conduct heat transfer and evaporation. The advantages are high heat transfer efficiency, fast evaporation speed and short material residence time, so Suitable for evaporation of heat sensitive substances. According to the film formation reasons and flow direction, it can be divided into a rising film evaporator and a falling film evaporator. There are three types of wiped film evaporators. The thin film evaporator thin film evaporator unit is composed of three parts of an evaporator, a vapor-liquid separator and a preheater, and a simple separator, and the evaporator is a rising film type tube heat exchanger. The evaporator has the characteristics of large production capacity, high efficiency, short heating time of materials, etc. It is suitable for concentration of dilute solution in pharmaceutical, food, chemical and other industries. The contact parts of the equipment and materials are made of stainless steel and have good corrosion resistance. Durable and meets hygiene requirements.
The contact part of the film falling film evaporator and the material are made of stainless steel, which has good corrosion resistance, durability and meets the sanitary requirements.

1. Turn on the circulating cooling water pump of the thin film evaporator to make the hydraulic spray Condenser in operation. Open the concentrate container and vacuum valve.
　　
2. Open the feed valve of the thin film evaporator and draw the liquid into the equipment from the high level tank by means of vacuum.
　　
3. Turn on the power, start the motor that rotates the thin film evaporator, and observe whether the motor rotates in the correct direction.
　　
4. Slowly open the steam valve, let the steam enter the jacket, and remove the non-condensable gas from the jacket after the bypass valve, then turn on the steam trap. Adjust the steam pressure to about 0.15Mpa.
　　
5. Observe the discharge condition from the bottom sight glass. It is strictly forbidden to operate under the condition that the equipment is filled with liquid.
　　
6. After the system of the thin film evaporator is stabilized for 5 minutes, the concentrated solution concentration is sampled and analyzed, and the amount of opening of the feed valve is adjusted to bring the concentrated liquid to a predetermined desired concentration.
　　
7. When the liquid level of the concentrate container of the thin film evaporator is full, switch to another container according to the procedure.
　　
8. If the user's conditions permit, increase the height of the evaporator, you can use two concentrate containers, or use the automatic speed control pump to directly extract the concentrate.

The film falling film evaporator is a type of evaporator, which is characterized in that the material liquid flows along the wall of the heating pipe to conduct heat transfer and evaporation. The advantages are high heat transfer efficiency, fast evaporation speed and short material residence time, so Suitable for evaporation of heat sensitive substances.