Purification workshop workshop drying equipment
Purification pharmaceutical cleanroom workshop drying equipment
During the drying process of the purification workshop, the first is the evaporation of the liquid on the surface of the material, and then the internal liquid gradually diffuses to the surface and continues to evaporate until the drying is complete; the purpose of drying is to increase the air temperature, so that the surface temperature of the material is increased and the evaporation is accelerated. Speed, good for drying,...
Text label: purification workshop drying equipment, dust-free plant equipment engineering
Purification workshop workshop drying equipment
During the drying process of the purification workshop, the first is the evaporation of the liquid on the surface of the material, and then the internal liquid gradually diffuses to the surface and continues to evaporate until the drying is complete; the purpose of drying is to increase the air temperature, so that the surface temperature of the material is increased and the evaporation is accelerated. The drying speed is beneficial to drying, and the appropriate drying temperature should be selected according to the properties of the material; reducing the relative humidity of the air can also improve the drying efficiency. In actual production, hygroscopic agents such as silica gel are commonly used to remove water vapor in the space, or use exhaust and blast devices to update Space airflow; increasing the air flow rate can also speed up the drying rate, reduce the film thickness, and reduce the surface vaporization resistance, thereby increasing the drying rate in the constant velocity stage. Single-drum dryers are commonly used continuous dryers, which are suitable for drying concentrated leachate or viscous fluids. The surface is larger, the drying time is shortened, and continuous production can be carried out.
The box dryer adopts forced air flow to achieve the purpose of drying. It is composed of a blower, an air conditioner, a partition, a heater, a shelf, etc. During the specific operation, the wet materials that need to be dried are placed on the shelf with a partition On, turn on the heater and blower, the air flow is heated in the direction indicated by the arrow, and the moisture is taken away through each layer from top to bottom, and finally the moist air is discharged from the outlet. In order to prevent heat loss, the outer shell of the oven is made of asbestos. or the like to prevent heat loss; in large production, in order to improve drying efficiency, measures such as forced airflow and segmental preheating, control of airflow speed, increase of hot air temperature, and reduction of relative humidity can be adopted. The material is heated for a short time and can be continuously produced. The spray drying device is composed of a drying chamber, a thermometer, a nozzle, compressed air, a preheater, a collection barrel, a gas-powder separation chamber, and a blower. It is sprayed into the drying chamber, and then exchanged with the hot air; when the blower is turned on, the air is heated to about 280 ℃ through the filter and preheating chamber, and then enters the drying chamber along the tangential direction from the upper part of the dryer, and the temperature of the drying chamber is generally maintained at 120 Below ℃, the dried fine powder falls into the collection barrel, and the partially dried powder enters the separation chamber with the hot air flow and is collected in the cloth bag, and the hot exhaust gas is discharged from the exhaust port; this method of spray drying has a large surface area, heat and mass transfer. Quick, water evaporates quickly, drying time is short, generally several seconds to tens of seconds, with the characteristics of instant drying; the process is simple and easy to operate; the spray drying process is easy to realize mechanization and automation; , the droplet temperature is roughly the same as the hot air wet bulb temperature, so the drying quality is good, especially suitable for heat-sensitive materials; the disadvantage is that the volume heat transfer coefficient of heat-labile materials is small, and the production intensity is low. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for purification workshops and dust-free workshops.
Vacuum dryer is to dry the air after evacuating air in a closed container. It is mainly composed of steam inlet, condensate outlet, condenser, collector, valve, etc. It can accelerate drying and reduce temperature, and can also dry products. Loose and easy to crush; the vacuum dryer has strong adaptability and wide application; the heat utilization rate is high, and the thermal efficiency is generally 70%-80%; the heating medium can be water vapor or hot water. The disadvantages are discontinuous operation, intermittent feeding and discharging, long drying time, low output, complex equipment structure and high cost. Radiation drying system heat energy is emitted by the radiator in the form of electromagnetic waves, incident on the surface of the wet material, absorbed and converted into heat energy, and the water is heated and vaporized to achieve the purpose of drying.
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