Maintenance and cleaning methods of small extraction and concentration equipment

　　The small extraction and concentration equipment is mainly composed of concentration tank, condenser, vapor-liquid separator, cooler and liquid receiving barrel, all of which are made of stainless steel. By using two effect evaporation at the same time, the secondary steam is fully utilized, which not only saves the investment of the boiler, but also reduces the energy consumption compared with the single effect concentrator. In the double effect production, the secondary steam of primary effect is used to supply the secondary effect concentration and heating. According to the requirements, when the specific gravity of primary effect extract is about 1.2, the secondary effect combined concentration can be carried out in parallel, and the extract can be discharged when the concentration reaches about 1.4.

　　The small extraction and concentration equipment is made up of heating automatic circulation and negative pressure evaporation. It can accelerate the evaporation speed, achieve the ratio of (1.4) liquid sealing foam concentration, and the concentration of the solution with no pollution components. The equipment is fully functional, suitable for water extraction and alcohol extraction, can carry out atmospheric pressure and negative pressure extraction, and can recover volatile oil. Equipped with vacuum converter and control box, it is easy to operate and can realize extraction at normal temperature and concentration at low temperature; Extraction at room temperature and concentration at room temperature; Low temperature extraction, low temperature concentration and other process requirements.

　　Maintenance methods of small extraction and concentration equipment:

　　1. Check all kinds of instruments once a month.

　　2. It is strictly forbidden to operate the vacuum pump without load. Before starting the vacuum pump, the inlet valve of the vacuum pump should be opened first (the inlet valve opening should be moderate, and the inlet flow should be well controlled). In case of overload, the explosion will sound, and the explosion relief adjusting screw can be loosened.

　　3. Every shift should check the sealing parts and eliminate the leakage in time.

　　The cleaning methods of small extraction and concentration equipment are as follows:

　　1. Before starting the machine, it should be in a clean state, and online cleaning is generally adopted.

　　2. When the cleaning is stopped, appropriate amount of clean water should be pumped to steam for half an hour, recycled for half an hour under the condition of equipment operation, and then the sewage should be discharged, washed with clean water and discharged until the next production.

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