The dehumidification and dehumidification of the germplasm resource bank should focus on creating a stable and regular controlled environment while saving energy and making full use of the equipment.
Classification of tablet press: Models can be divided into single punch tablet press, rotary tablet press, sub-high speed rotary tablet press, automatic high speed tablet press and rotary core tablet press.
The sheet shape pressed by the tablet press is initially flat circular, and later developed into shallow circular arc and deep circular arc on both sides, which is for the need of coating. With the development of special-shaped tablet press, oval, triangle, oblong, square, diamond, circular ring tablets followed. In addition, with the continuous development of preparations, due to the requirements of compound preparations and timed release preparations, special tablets such as double layer, triple layer and core coating are made, which need to be completed on special tablet press.
Rotary tablet press is a machine which is made of several pairs of die distributed on the turntable to make a circular lifting movement according to a certain track and press the granular material into tablet through the press wheel. And the stamping rod with the rotary table rotating speed ≥60m/min line press is called high-speed rotary tablet press, this high-speed rotary tablet press has a forced feeding mechanism, the machine is controlled by PLC, has the automatic adjustment of pressure, control the weight of the piece, eliminate the waste piece, print data, display fault shutdown and other functions, in addition to the control of the weight difference within a certain range, Quality problems such as missing Angle and loose lobe can be automatically identified and eliminated.
With the development of market demand, the scope of application of tablet press is more and more wide, no longer simply limited to the suppression of Chinese and Western medicine tablets, more widely suppressed health food, veterinary medicine tablets, chemical tablets: such as mothballs, washing blocks, smurf blocks, art powder, pesticide tablets, food tablets: chicken essence block, isatis root block, divine Qu tea block, compressed biscuits.
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There are different requirements for each room in the germplasm resource bank:
1, storage room. Storage room air conditioning system At home and abroad in recent years, the basic use of refrigeration and dehumidification equipment, sent to the storage room of low temperature, dry air should be distributed evenly, can not form a vortex. Therefore, the upper air supply and the lower air return are often used. There is a control room in or near the equipment room. The instrument can monitor or record the temperature and humidity of the storage room.
2, drying room and drying room. Drying room is usually set to constant temperature, humidity and humidity dehumidification unit, temperature and humidity generally controlled at +15 °C, relative humidity of about 15%. Drying studio temperature is generally 20 °C, relative humidity is about 30% This room in addition to set the automatic control device, but also should always check the seed temperature during the drying process changes, in order to prevent the automatic temperature control device failure and affect the drying, damage seed.
3, germination room. Often used cabinet type constant temperature, constant humidity unit, the unit is composed of two parts: compression condensing unit and air conditioner. The air conditioner is equipped with a fan, an evaporator, an electrode humidifier, an air filter, and an automatic control device. The unit is placed in a small room next to the germination room, and the indoor air conditions are processed through pipes to meet the requirements for seed germination.
How to Refrigerate and Dehumidify Germplasm Resources