With the continuous progress and development of micro-computer technology and automatic control technology, many areas of the introduction of the computer to automatically detect and control technology, and computer automatic monitoring and control system requirements have become more sophisticated, flexible configuration software to be shipped students. Of MCGS (Monitor and Control Generated System, and general monitoring system) is a set of configuration software is used to quickly build and generate computer monitoring system, it can be based on Microsoft (various 32-bit Windows platform) running through the collection of field data processing animated displays, vacuum drying alarm processing, process control, real-time curve history curve and report output to a variety of ways to provide users with a program to solve practical engineering problems, take full advantage of Windows graphics capabilities, interface consistency, easy to learn easy-to-use features, than using a dedicated machine, the development of industrial control systems more versatile, has a wider range of applications in the field of automation.
Synthesis process in many chemical and pharmaceutical products (intermediate or final products), the solid particles suspended in a liquid, at a certain stage separated from the slurry. First use of mechanical solid-liquid separation equipment, such as filtration centrifuges, vacuum (or pressure) filters, sedimentation, filter and static thickening, etc., to separate the solids from the liquid. A process to select the best type of mechanical separation equipment, vacuum drying based on the solid nature of production and mode of operation and other factors to determine. But usually only by a mechanical solid-liquid separation step can not meet the requirements of product quality, because only rely on mechanical force can not remove all the liquid. The product discharged from the centrifuge or filter, depending on the products and equipment, humidity is generally in the range of 5% to 80% (by weight). Therefore, after the completion of the mechanical solid-liquid separation, the general need to heat solid-liquid separation step, the residues in solid liquid separation. This step is often referred to as "dry".
An important driving force to make our products the drying effect of changes in the evaporation temperature of the contained liquid, and vacuum drying temperature depends on the process pressure. The evaporation temperature lower process pressure drop can bring many benefits, especially for contact drying. Not necessary to design a minimum pressure and maximum allowable temperature operation ideal drying system, because it would require large and expensive peripherals. Systems are generally designed to be self-regulating pressure vessel. In other words, the condenser and the vacuum device is suitable to handle the higher pressure under the high steam flow, pressure is also reduced when the drying decline.
Vacuum Dryer is by removing the packaging container internal air to reach a predetermined degree of vacuum inside the container of water equipment, remove. Work when dry, the tank in a vacuum jacket through hot water (or steam, conducting oil) heating, with the tank low-speed rotation, the material in the tank continuously from top to bottom, inside and outside as a "diamond-shaped trajectory" movement and to absorb the evaporation of water The steam is continuously discharged through the vacuum line to achieve the purpose of drying. According to customer requirements in the dry mixture at the same time, built-in spray, filtering, grinding, and other devices to achieve its multi-function operation.
Vacuum dryer by refrigeration system, vacuum system, heating system, electrical and instrumentation control systems. The main components of the oven, condenser, cooling unit, vacuum pump, heating / cooling device. The working principle of the vacuum dryer is the first freeze dry items will be below the triple point temperature, the items in the solid water (ice) and then under vacuum condition to sublimate directly into water vapor, to exclude from the article, so that dry goods . Materials are processed into frozen positions to freeze, and then into the sublimation of dry warehouse, followed by post-processing workshop packaging. Vacuum system for lyophilization positions to establish the conditions of low pressure, the heating system to provide materials with latent heat of sublimation, the refrigeration system to the cold trap and the drying chamber to provide the required cooling capacity.
Efficient radiant heating vacuum dryer equipment, material is heated evenly; efficient capture of the water-cooled trap, and to achieve rapid defrosting; efficient vacuum unit, and can realize the oil-water separator; parallel centralized cooling system, multi-channel on-demand cooling stable working conditions conducive to energy conservation; artificial intelligence, control, control of high precision, easy to operate. The quality requirements of the freeze-dried products: biological activity of the same uniform appearance and color, full shape, solid structure, fast dissolving, low residual moisture. To obtain high-quality products, there should be a more comprehensive understanding of the theory and technology of the freeze-dried. The freeze-dried vacuum drying process, including pre-freezing, sublimation, and then freeze-dried three phased. Reasonable and effective to shorten the freeze-dried cycles in industrial production has significant economic value. Vacuum Dryer pass into thermal energy (such as hot water, low pressure steam or hot oil) in a sealed sandwich pass was dry materials, the heat within the shell. Under driving of power, the tank slowly rotating the tank material constantly mixed so as to achieve the purpose of reinforced drying. Material in a vacuum, atmospheric pressure down the material surface of the water (solvent) to reach saturation, evaporation, and promptly eliminated by the vacuum pump.
Materials within the water (solvent) continue to penetrate to the surface, evaporation, discharge, three processes are ongoing, the material in a very short period of time to achieve the purpose of drying. Equipment import and export of pipe from the cylinder and framework, the size of the hollow heat the disk, spindle, cross arm and rake leaves, disc feeding device, the cutting plate and the export of finished products, exhaust outlet, the heat carrier, view the door, worm gear reducer, no level transmission and motor. The main components of the device is hollow heating coil, hollow Ministry of welded baffle bulkhead to strengthen, both to increase the stiffness and strength, but also improves the heat transfer effect, and played a conduction drying the advantages of high utilization of geothermal energy.
Freeze-drying is to use the principle of sublimation drying of a technique is to dry the material at low temperatures, rapid freezing, and then in a vacuum environment, the direct sublimation of frozen water molecules as water vapor escape. Frozen drying the product obtained is known as freeze-dried material (lyophilizer), the process known as freeze-dried (lyophilization).
Material before drying, remains low temperatures (frozen), ice crystals at the same time uniform distribution of material in the sublimation process does not concentrate phenomenon occurs due to dehydration, to avoid the bubble, oxidation and other side effects generated by the steam. The dry material was dry sponge porous volume is essentially the same, easily soluble in water and restitution. The maximum extent possible to prevent the degeneration of the dry material physics and chemistry and biology.
Import and export of pipe layers heated plate on both the heat carrier, generally the upper layers of the low-pressure saturated steam or hot water, hot oil, in series, parallel or series-parallel input heating, control the layers of temperature; the bottom of the second floor which leads to the cooling water. to reduce the product temperature, heat recovery, and ensure quality. Heating coil according to a certain pitch is fixed to the cylinder frame, showing the level of placement, during which each floor are equipped with a cross arm support, upper and lower levels of dislocation 45 ° staggered fixed on the center spindle and worm gear reducer, CVT and motor drive slowly turning to 0.6 ~ 3.7 (r / min). Support each boom tops have removable plow-shaped rake leaves or flat scraper, was equidistant arrangement. Rake leaves articulated and reed swing structure, so that the bottom edge on the disc with dual float and can be adjusted according to the material traits angle of rake leaves to ensure that the material in the disk is constantly advancing.
Dry material from the top of the disc feeder continuously added to the equipment within the top layer of small heating coil on the inner disk, the mechanical action of the rotary rake leaves, while tumbling mixing, one side from the inside out, forward movement was jagged covered the entire disk, the contact with the heating and drying; material from the outer edge of the drop to the outer disk of the second layer below the heating coil, rake leaves under the action of reverse-mount, and from the outside in sequential moved to the inner edge, and fell on the third floor of a small heating coil inner disk. And so on, so that the material layer by layer from top to bottom layer mobile continuous heating and drying.
Evaporation of moisture and equipment exhaust mixing from the upper outlet of the natural discharge, the final dry material to fall into the footwall, rake leaves blew into continuous discharge in the bottom of the discharge port, access to qualified dry finished. Based on product performance, the size of the drying requirements and processing capacity, plate dryer with spindles stepless manual adjustment disc feeder adjustment sets the height of the control layers of the heating plate temperature distribution and a final cooling down a series of measures have played a superior performance of the plate dryer.
The main drawback of the vacuum dryer is need for a pumping steam vacuum system, making the investment in equipment costs, high operating costs; low efficiency of equipment, production of small. To overcome these shortcomings, many technology workers, to make a lot of effort. Also, because the vacuum drying has many advantages, some products have to vacuum drying equipment. Therefore, the development of vacuum drying equipment will be promising.
Vacuum Dryer technology features:
A. Continuous feed and discharge, the feed rate may need to be set freely in the vacuum state.
Two. The heating system can be steam, hot water and electric heating transfer heat conduction oil heating and other forms.
3. The drying temperature from 25 ℃ -80 ℃ arbitrary regulation, after 20 minutes -60 minutes continuous discharge until the batch to complete.
4. Track Teflon material, smooth running, reliable, uniform heating area. Crawler speed can be adjusted layers in 2-5 layers can be determined based on the user's production requirements.
5 Using a variety of fabric device can be adapted to a wide range of liquid extract, powder and granular materials dry.
6. With automatic crushing system under vacuum, dry particle mesh can be arbitrarily chosen based on user requests.
7. With CIP the reign cleaning system, automatic cleaning fast and easy.
8. Selection of high quality vacuum unit and carefully designed combination, with continuous high-capacity pumping speed and stability of the vacuum.
9. Energy consumption, no waste, low-noise.
10. Full compliance with GMP certification requirements.
Vacuum Dryer main advantages:
The full set of process automation, pipeline, continuous, and procedures.
The invariance of the heat sensitive materials, contamination-free opportunity to complete the drying process in vacuum low-temperature state.
Suitable for drying a variety of difficult materials.
Dry materials (moisture content) adjustable.
Energy consumption is only one-third of the centrifugal spray machine of the same production.
PLC touch screen operation control, and there is continuous protection device.
This machine is designed reasonable, compact structure, convenient installation and commissioning to adapt to the conditions of most of the work placement.
Vacuum Dryer is mainly the following categories
(1) double cone rotary vacuum dryer
The concentration of the double cone rotary vacuum dryer for the chemical, pharmaceutical, food and other industries, in powder, granular and fibrous materials, mixing, drying, and the need for low-temperature drying of materials (such as biochemical products, etc.), more easily oxidized volatile, the thermosensitive strong stimulation, drying toxic materials and the materials are not allowed to destroy the crystal. Two elastic belt / chain connection, and thus the equipment running smoothly. Specially designed process, and fully reflects the good concentricity of the two axis, heat medium and vacuum systems are a reliable mechanical seal or rotary joint. The aircraft can stepless speed regulation, but also thermostatically controlled. A heat transfer medium from the high-temperature heat conduction oil, the temperature steam and low temperature hot water readily available. Drying the adhesive material in the tank for your specially designed copy board structure.
(2) vacuum rake dryer
Vacuum rake dryer, a heat conduction dryer. Material not directly contact with the heating medium is suitable for drying a small amount of high temperature and easy oxidation of the sludge, pasty materials, the moisture content was 15% to 90%. Level rake agitator blades in the dryer is made from cast iron or steel, installed in a square shaft, half of the blade direction to the left, the other half to the right. Shaft speed the 7 ~ 8r/min, it is driven by a motor with a gear box. Automatic steering, the rotation axis direction, and a stirrer rotation direction change every 5 ~ 8min.
3 Plate Vacuum Dryer
Plate vacuum dryer, also known as disc vacuum dryer, dry Japanese publishing monographs have been introduced. China, Shanghai, Shijiazhuang and other places have been successfully developed. On the basis of conduction dryers in intermittent stirring, the combination of a series of advanced technologies, developed through continuous improvement and development of a multi-layer fixed hollow heated disk (also known as contained in the feed tray), turn rake mixing, the vertical continuous conduction-based drying device.
(4) low temperature with continuous vacuum dryer
Low temperature with continuous vacuum dryer is developed after repeated comparison of the successful development of a new concept of energy-efficient drying equipment at the advantages and disadvantages of the conventional spray drying and freeze drying
In Chinese medicine, Western medicine, chemical, food, health products and other products of the industry is drying, spray drying is conducive to cost, but the solubility of the product. Flavor and shape of the powder there is a big defect, the viscosity slightly higher and the requirements of heat-sensitive products is powerless. Conventional freeze-drying can be an excellent product solubility and high quality products, but the yield is too low, and expensive.
Low temperature continuous vacuum dryer of the process indicators just between these two devices, it can make dried products internal formation of porous loose to retain the original materials nature, good appearance, due to the vacuum low-temperature drying, so you can meet the processing requirements of a great part of the heat-sensitive materials.
Low temperature continuous vacuum dryer broke through the technical problems of continuous access to the material under vacuum, static drying success into dynamic dry. Substantially increased the yield of dry products, but also makes the cost of production declined.
The low temperature continuous vacuum dryer is particularly suitable for spray drying and vacuum oven difficult to resolve high-viscosity, high-fat. High-sugar and other dry materials. And maintain the stability and consistency of the product volume.
(5) continuous type vacuum dryer
Freeze-drying is to use the principle of sublimation drying of a technique is to dry the material at low temperatures, rapid freezing, and then in a vacuum environment, so the direct sublimation of frozen water molecules as water vapor escape. Freeze-drying the product obtained is called the freeze-dried material (lyophilizer), the process known as freeze-dried (lyophilization)
Material before drying, remains low temperatures (frozen), ice crystals at the same time uniform distribution of material in the sublimation process does not concentrate phenomenon occurs due to dehydration, to avoid the bubble, oxidation and other side effects generated by the steam. The dry material was dry sponge porous volume is essentially the same, easily soluble in water and restitution. The maximum extent possible to prevent the degeneration of the dry material physics and chemistry and biology.
Import and export of pipe layers heated plate on both the heat carrier, generally the upper layers of the low-pressure saturated steam or hot water, hot oil, in series, parallel or series-parallel input heating, control the layers of temperature; the bottom of the second floor which leads to the cooling water. to reduce the product temperature, heat recovery, and ensure quality. Heating coil according to a certain pitch is fixed to the cylinder frame, showing the level of placement, during which each floor are equipped with a cross arm support, upper and lower levels of dislocation 45 ° staggered fixed on the center spindle and worm gear reducer, CVT and motor drive slowly turning to 0.6 ~ 3.7 (r / min). Support each boom tops have removable plow-shaped rake leaves or flat scraper, was equidistant arrangement. Rake leaves articulated and reed swing structure, so that the bottom edge on the disc with dual float and can be adjusted according to the material traits angle of rake leaves to ensure that the material in the disk is constantly advancing.
Dry material from the top of the disc feeder continuously added to the equipment within the top layer of small heating coil on the inner disk, the mechanical action of the rotary rake leaves, while tumbling mixing, one side from the inside out, forward movement was jagged covered the entire disk, the contact with the heating and drying; material from the outer edge of the drop to the outer disk of the second layer below the heating coil, rake leaves under the action of reverse-mount, and from the outside in sequential moved to the inner edge, and fell on the third floor of a small heating coil inner disk. And so on, so that the material layer by layer from top to bottom layer mobile continuous heating and drying.
Evaporation of moisture and equipment exhaust mixing from the upper outlet of the natural discharge, the final dry material to fall into the footwall, rake leaves blew into continuous discharge in the bottom of the discharge port, access to qualified dry finished. Based on product performance, the size of the drying requirements and processing capacity, plate dryer with spindles stepless manual adjustment disc feeder adjustment sets the height of the control layers of the heating plate temperature distribution and a final cooling down a series of measures have played a superior performance of the plate dryer. |
The many advantages of the vacuum dryer to determine its extensive use of field