Dust-free workshop workshop drying equipment
Dust-free pharmaceutical cleanroom workshop drying equipment
Drying is the operation of using heat energy to vaporize the moisture in wet materials, and using airflow or vacuum to take away the vaporized moisture to obtain dry solid products. The divided airflow is generally air; the purpose of the drying operation is to remove some solids...
Text label: clean room workshop, drying equipment, Zhongjing Global Purification
Dust-free pharmaceutical cleanroom pharmaceutical cleanroom drying equipment
Drying is the operation of using heat energy to vaporize the moisture in wet materials, and using airflow or vacuum to take away the vaporized moisture to obtain dry solid products. The divided air flow is generally air; the purpose of the drying operation is to remove the moisture or solvent in some solid raw materials, semi-finished products and finished products, so as to facilitate storage, transportation, processing and use; the convection dryer is the direct contact of the hot gas in a convection manner Drying equipment for mass transfer and heat transfer between the materials. The chamber dryer mainly uses hot air to pass through the wet material surface to achieve the purpose of drying; its structure is simple, the equipment investment is low, and the adaptability is strong. , sometimes used for drying more expensive materials; the disadvantage is that it often requires manual turning of materials, high labor intensity, poor conditions, uneven drying, low heat utilization rate, suitable for small-scale and multi-variety, requiring large changes in drying conditions and long drying time. Wait for drying operation.
Air drying is to use high-speed hot air to blow powder and granular materials to suspend them in the drying tube, and dry them in the process of air conveying. It is a specific application of air conveying technology in drying; the length of air drying tubes is generally At 10-20m, when the operation is normal, the material stays in the drying tube for a short time, generally 0.5-2s, and no more than 5s at most. Air-flow drying has high production intensity, short drying time, wide adaptability, high heat utilization rate, simple structure, low cost, small footprint, continuous and stable operation, and easy control, so it is especially suitable for drying heat-sensitive materials; the disadvantage is that it is inconvenient to install and maintain , Most of the products obtained are fine powders, which are difficult to recover and separate, and are not suitable for materials that stick to walls, require a certain shape, and require drying below the critical moisture content. Several improved airflow dryers: multistage airflow dryer, pulse airflow dryer, cyclone airflow dryer. The cyclone air path dryer uses a cyclone separator as the drying tube. It has a cylindrical body with a slight taper, which is mostly made of stainless steel. The inner wall is smooth and non-sticky. It makes a spiral motion between the central exhaust pipe and the cylinder body, the dry material is discharged through the discharge port at the bottom of the cylinder, and the air is discharged from the central exhaust pipe. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for dust-free workshops and clean workshops.
Spray dryer is a convection dryer in which the material liquid is sprayed into mist droplets by the atomizer and dispersed in the hot air flow to quickly evaporate the moisture; the compressed air is filtered and sterilized by a filter, and then heated by a heater to make the The temperature and cleanliness meet the process requirements, the hot air enters the top of the spray tower, and the thin material liquid is sprayed into fine mist particles through the nozzle to fully contact the hot air for drying; the diameter of the droplets after atomization is 10-60μm, and the specific surface area is violent. The water evaporates very quickly. Before the droplets reach the wall of the device, they are dried into powder and fall into the bottom of the tower along the wall. The waste gas passes through the cyclone separator and the bag filter to collect the fine powder and then discharge. The spray dryer can directly obtain powder products from the liquid material, and has good solubility; short drying time and high quality; especially suitable for drying heat-sensitive materials; stable operation, easy automatic control, and reduced labor intensity. The disadvantage is that the volume heat transfer coefficient is small and the heat utilization rate is low; the equipment is bulky and the operation elasticity is small; the phenomenon of sticking to the wall is easy to occur;
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