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    1. High efficiency and energy saving: The triple-effect evaporator has a high energy utilization rate because the secondary steam can be reused, significantly reducing energy consumption. Compared to single-effect evaporators, triple-effect evaporators can save a substantial amount of energy. 2. Advanced Process: The process flow of the three-effect evaporator is advanced, enabling continuous feeding and discharging, thus making the production process more stable and controllable. 3. Wide range of applications: The triple-effect evaporator can be applied to the evaporation and concentration of various solutions, such as those in the chemical, pharmaceutical, food, and other industries.

     1. Evaporative crystallization technology: Principle: By heating, the water in the wastewater evaporates, while impurities such as salt precipitate out in the form of crystals. System composition: It primarily consists of a pretreatment system, a heating system, an evaporation system, and a crystallization system. The pretreatment system is responsible for removing large particles and suspended solids from the wastewater; the heating system heats the wastewater to boiling; the evaporation system evaporates the water content from the wastewater; and the crystallization system precipitates impurities such as salts.      2.  Multi-effect evaporation technology: Principle: By utilizing the difference in evaporation pressure at different temperatures and operating multiple evaporation units in series, heat energy is recycled, achieving the goal of energy conservation. Advantages: High thermal energy utilization rate and low energy consumption.      3.  Mechanical vapor recompression (MVR) technology: Principle: The steam is compressed by a mechanical compressor to increase its temperature and pressure, and then reused in the evaporation process, achieving energy recycling. Advantages: It further reduces energy consumption, enhances wastewater treatment efficiency, and is more environmentally friendly.

Rake Tooth Structure   The rake tooth device of the dryer consists of two sets of rake teeth, one facing left and one right, mounted at opposite angles on either side of the drive shaft. Each rake tooth has a square hole at its head to mate with the drive shaft, with adjacent rake teeth positioned 90° apart during assembly. The ends of the rake teeth come in two shapes: one flat and paddle-shaped, and the other also flat but irregularly shaped. Both are at a certain angle to the drive shaft's centerline (i.e., left and right). The paddle-shaped rake teeth are used in the middle of the equipment, while the irregularly shaped rake teeth are used at the ends of the dryer to fit the inner wall surface. The rake teeth are installed on one side, and the right-hand rake teeth on the other. Therefore, when material is added, the rotation of the rake teeth causes the material to move to both sides and then back to the center, resulting in uniform mixing. This prevents overheating when the material contacts the inner wall of the shell and also achieves a pulverizing effect, increasing the aeration surface and promoting the drying process.   In addition, within each of the four quadrants of the rake teeth, a seamless steel pipe, parallel to the main shaft and closed at both ends, is placed for striking the walls of the rake, which helps in cleaning and crushing materials. The rake teeth are generally made of cast steel. The drive shaft bears torque and bending moment during operation. Besides meeting certain strength requirements, the drive shaft must also have sufficient rigidity to prevent it from jamming against the inner surface of the casing. The drive shaft is generally made of grade steel.   8 Important Precautions for Rake Dryers   1. Heating or cooling the dryer should be done slowly. Users should choose appropriate heating and cooling rates according to the situation.   2. During equipment operation, sampling should be performed according to the standard procedure. After sampling, the machine should be restarted.   3. Rolling bearings should use MOS2 composite grease (ZFG-IE) with a maximum temperature of 150 degrees Celsius. Check at least once a month. Replace with new grease when it dries out.   4. Maintenance of the cylindrical gear reducer should be performed according to its instruction manual. 5. After each drying cycle, the filter inside the tank should be cleaned of adsorbed powder to ensure unobstructed filtration.   6. The mechanical seal or packing seal between the main shaft and the tank body should be inspected regularly. If leakage is found, repair or replace the seal immediately.   7. The equipment should be inspected and repaired every six months to one year. During maintenance, the original assembly method and tolerance requirements must not be altered, and appropriate lubricating oil should be added as specified.   8. Special note: The equipment must be reliably grounded from the time of installation and use.

1. Routine Maintenance   ① Before operating the DW series belt dryer each shift, check for leaks in valves and pipelines.   ② Lubricate all rotating and friction parts regularly.   ③ Check the reliability of the power grounding wires for each fan and electrical control box.   ④ Check the indications of all instruments and meters for normal operation, and have them calibrated regularly by the metrology department.   ⑤ Check the DW series belt dryer body for vibration, cracks, damage, and corrosion.   ⑥ Test run each motor to ensure it is working properly, and perform regular maintenance.   ⑦ Check all parts and fasteners for looseness and abnormal noises; troubleshoot any faults promptly.   ⑧ Check V-belts, chains, and other transmission mechanisms for deformation, looseness, and wear; adjust chain tension as needed.   ⑨ Check the electrical safety start and stop devices for sensitivity, accuracy, and reliability.   ⑩ Repair or replace any damaged parts immediately. 2. Annual Maintenance and Repair Scope   ① Inspect all electrical installations to ensure they meet safety requirements;   ② Thoroughly eliminate defects and restore the equipment to its original performance and effectiveness;   ③ Replace and repair worn parts and components that have lost performance;   ④ Conduct a comprehensive overhaul of the equipment.   3. Management Records   After equipment maintenance and repair, complete the equipment maintenance and repair record.

Key points to note during vacuum dryer installation:   1. The vacuum chamber casing of the vacuum dryer must be effectively grounded to ensure safe operation.   2. The vacuum chamber of the vacuum dryer should be used in an environment with a relative humidity ≤85%RH, free from corrosive gases, strong vibration sources, and strong electromagnetic fields.   Key points to note during vacuum dryer use:   1. The vacuum chamber working chamber of the vacuum dryer must not be placed in an environment without explosion-proof or corrosion-proof treatment. Flammable, explosive, or corrosive substances must not be placed there for drying. If the items to be dried are moist, a filter should be placed between the vacuum chamber and the vacuum pump to prevent moist gas from entering the vacuum pump and causing malfunction. If the dried items are lightweight and small in size (small particles), a barrier screen should be added to the vacuum port in the working chamber to prevent the dried material from being sucked in and damaging the vacuum pump (or solenoid valve).   2. The vacuum pump of the vacuum dryer cannot operate for extended periods. Therefore, once the vacuum level meets the requirements for drying the items, first close the vacuum valve, then turn off the power to the vacuum pump. When the vacuum level falls below the requirements for drying the items, reopen the vacuum valve and the power to the vacuum pump to continue vacuuming. This will extend the service life of the vacuum pump. 3. After repeated use, the vacuum dryer may experience a failure to create a vacuum. In this case, except for maintenance, do not disassemble the left side cover of the vacuum dryer to avoid damaging the electrical control system. Replace the door seal or adjust the door latch extension interval to resolve the issue. When the vacuum chamber drying temperature exceeds 200℃, slow leakage may occur. In this case, remove the back cover of the chamber and loosen the heater base with an Allen wrench, then replace the sealing ring or tighten the heater base to resolve the issue. If the rubber stopper of the vent valve is difficult to rotate, apply a suitable amount of grease for lubrication.   4. The vacuum dryer should be kept clean regularly. Never wipe the glass door with reactive chemical solutions; use a soft cotton cloth instead. If the vacuum dryer is not used for a long time, clean the exposed electroplated parts, apply neutral grease to prevent corrosion, cover it with a plastic film dust cover, and place it in a dry indoor environment to prevent electrical components from getting damp and damaged, which would affect its use.

In flash drying, wet material enters the grinding and drying section of the dryer body via a customized feed system. A grinding rotor disperses the wet material into very fine particles, which are fluidized in the grinding chamber by temperature-controlled hot gas from an air heater.   The hot air (or inert gas) can be heated to 650°C, and its size is reduced at the bottom of the flash dryer as the wet product is dispersed. The system maintains negative pressure via an exhaust fan, significantly increasing the surface area of ​​the product, causing water (or other solvents) to evaporate instantaneously. The dried and fine particles are conveyed with the airflow to the top of the dryer, where a separator classifies the particles by size. The particles then pass through the classifier at a set cut point and are conveyed with the exhaust gas to a dust-air separation system, such as a cyclone separator or cyclone dust collector.   The rotary flash dryer maintains a fluidized bed of product within the drying chamber to ensure low-level adhesion of the wet material to the chamber walls. In addition, process parameters such as classifier speed and outlet temperature can be used to control the moisture content and particle size of the final product.

Main Structure and Performance:   1. The drying chamber has a 60-degree tapered design at both ends, facilitating smooth unloading of finished products in one go.   2. The equipment is equipped with a timer. Forward, reverse, and jog buttons ensure the chamber stops correctly at the desired position, guaranteeing reliable unloading.   3. PLC control and data printing can be provided upon request; real-time printing of drying time, vacuum level, and temperature changes enhances traceability during production and stabilizes product quality.   4. This unit can be equipped with a low-temperature condensation system and a micro-dust separation system, which can recover evaporated solvents and optimize the working environment of the vacuum pump during drying.   5. The inner and outer layers of the cylinder are all made of stainless steel, avoiding potential difference corrosion at the weld between the carbon steel heating layer and the stainless steel, which could lead to weld perforation and unnecessary maintenance. 6. The frame is integrally welded from carbon steel plate and heavy-duty channel steel; the entire frame undergoes vibration aging treatment. The frame mounting surface is integrally milled using a large floor-type boring machine to ensure the verticality and parallelism of the shaft seats at both ends of the cylinder. The outer cover is made of mirror-finished stainless steel plate, preventing overall deformation.   7. Both ends of the double cone spindle are integrally formed and then precision-machined on a boring machine; ensuring the concentricity of the two shafts is between 0.10mm and 0.16mm, guaranteeing stable operation of the equipment and increasing the service life of other mounting components at both ends of the bearings.   8. Both the vacuum and heating ends use mechanical seals.   9. The vacuum filter head is made of imported 316L sintered stainless steel mesh, ensuring stable and reliable filtration quality.   10. Depending on the characteristics of the material, one to two adjustable-speed crushing devices can be installed in the cone section of the equipment to prevent material agglomeration and balling, ensuring uniform particle size and heating. This reduces drying time, facilitates control of drying quality, and also functions as a crusher and granulator, reducing material processing steps.   11. Depending on the material requirements, a real-time inert gas injection device can be added to stabilize the molecular structure of the material and accelerate the drying time.   12. The machine employs a high-speed electric motor and a worm gear reducer. The transmission belt uses a V-belt. Under the transmission of the motor, the reducer gears drive the main shaft gear of the drying cylinder. The drying cylinder rotates on a horizontal axis. The overall transmission structure is simple, robust, and operates smoothly and reliably.   13. The rotating supports at both ends of the main shaft use heavy-duty bearings. The transmission uses high-module high-carbon steel gears with high-frequency quenching for durability.   14. The end caps of the drying chamber are equipped with an automatic retraction and knocking device to prevent material from remaining inside the caps and ensure uniform heating of all materials.   15. The equipment is equipped with "CIP/SIP" devices to meet "GMP" production requirements.

The vacuum rake dryer is a novel horizontal intermittent vacuum drying equipment. Wet materials undergo conduction evaporation, with a scraper agitator continuously removing material from the heated surface and creating a circulating flow within the container. After moisture evaporates, it is extracted by a vacuum pump. This machine employs a large-area jacketed heating method, resulting in a large heat transfer surface and high thermal efficiency. The agitator ensures continuous circulation of the material within the drum, further improving the uniformity of heating and enabling the successful drying of slurry, paste, and pasty materials.   The vacuum rake dryer has a cylindrical body with three layers. The heating medium in the middle jacket can be circulating heat transfer oil (pressure <0.3 MPa gauge pressure) or steam (pressure <0.3 MPa gauge pressure). The outer layer is made of ultra-fine glass wool, providing excellent insulation and low energy consumption. Materials are fed into the inner layer. It is particularly suitable for drying materials at risk of oxidation and heat-sensitive materials. It does not damage crystalline materials during the drying process. Its advantages are even more pronounced for materials with strictly limited metal ions and materials requiring the recovery of volatile (or toxic) substances.   The vacuum rake dryer is simple to operate, facilitates material loading and unloading, significantly reduces the labor intensity of workers, and also reduces environmental pollution during the drying process, improving product quality and meeting the requirements of Good Manufacturing Practices (GMP) for pharmaceuticals. Applications:   1. Drying of materials in the pharmaceutical, food, and chemical industries.   2. Suitable for slurry, paste, and powder materials.   3. Heat-sensitive materials requiring low-temperature drying. 4. Easily oxidizable, explosive, highly irritating, or extremely toxic materials.   5. Materials requiring the recovery of organic solvents.

It is understood that the granulation fluidized bed dryer was designed and improved upon based on similar foreign products introduced in the 1980s. This equipment is particularly suitable for drying and granulating Chinese and Western medicines, as well as food products. The granules produced have strong disintegration, good flowability, and good solubility, and can be directly used for tableting, capsule filling, granules, and solid beverages.   Furthermore, this equipment can improve product flowability and solubility and reduce dust emissions through powder granulation. It uses anti-static filter cloth equipment for safe operation. It is equipped with a pressure relief vent to ensure the safety of equipment and personnel in the event of an explosion. The equipment has no dead corners, allows for easy and quick loading and unloading, and is easy to clean, meeting GMP requirements. It can be used for granulation in the pharmaceutical, food, pesticide, feed, fertilizer, pigment, and dye industries, and for granule and pill protective layers, color preparation, sustained release, film, and enteric coating.   In the international market, developing countries and underdeveloped countries and regions still favor cost-effective drying and granulation equipment. Compared to products from developed countries, Chinese products have a significant price advantage. However, with the completion of GMP upgrades in the pharmaceutical industry, demand will become saturated and will decline rapidly. Therefore, enterprises should focus on new product research and development, increase investment in technological innovation, continuously improve product performance, and enhance market competitiveness. We must recognize that compared to developed countries, domestic products still lag behind in quality and technology. Therefore, Chinese drying equipment manufacturers must continuously learn from advanced international technologies, combine them with practical experience, explore new processes, develop new technologies, and produce new products to participate in international competition. It is hoped that my country's drying equipment can soon embark on the path of internationalization.

Hot air transfers heat energy to wet materials through convection, carrying it away during vaporization. Besides the machine itself, the system includes auxiliary equipment. Horizontal fluidized bed dryers have relatively high efficiency, and installation is crucial.   **XF Series Horizontal Fluidized Bed Dryer Installation Method:**   1. After positioning the equipment according to the plant and process conditions, prepare the embedded plates, foundations, and pre-drilled holes for the vibrating fluidized bed, fan, cyclone separator, etc. The ground must be level, and the foundation must ensure the stability and stability of the main unit during operation.   2. Connect the inlet and outlet air ducts to the inlet and outlet air pipes using flexible hoses (can be made from canvas). Install the two vibrating motors in parallel at a certain angle, controlling them with the same forward/reverse switch. Open the eccentric block covers at both ends of the vibrating motors, connect the power supply to the motors, and observe the rotation direction of both motors.   3. Thoroughly and carefully check all fasteners for looseness. Run the machine under no-load for two minutes to observe whether the equipment runs smoothly and whether there is any abnormal vibration or noise. Also test whether the current in each phase of the vibratory motor is balanced and whether the motor temperature rise is within the allowable range (see the vibratory motor instruction manual for details). The system operates under slight negative pressure or negative pressure and is sealed, preventing dust from flying and ensuring a clean working environment. The flow-through parts are made of SUS304 material with smooth structural transitions. The main unit is equipped with a sanitary quick-opening inlet and a cleaning drain ball valve for easy cleaning and intermittent operation.

A fluidized bed dryer, also known as a boiling dryer, generally consists of a heater, a fluidized bed unit, a cyclone separator, a bag filter, an induced draft fan, and an operating platform. Depending on the properties of the material, a cyclone separator or a bag filter can be selected as needed. Working Principle The fluidized bed dryer utilizes air heated by a heat exchanger to form hot air, which is then distributed into the main unit via a valve plate. Wet material enters the dryer through the feeder. Due to the air pressure, the material enters a boiling state within the dryer, making extensive contact with the hot air, thus drying the material in a relatively short time.   Features Improves flowability and reduces dust emissions through powder granulation; Improves solubility through powder granulation; One-step granulation process combining mixing, granulation, and drying; Uses anti-static filter cloth for safe operation;   Features include a pressure relief vent to prevent personnel injury in the event of an explosion; Equipped with no dead zones, allowing for easy and quick loading and unloading, and thorough cleaning, meeting GMP standards.   Applications   Physical industry granulation: tablet granules, powder granules, capsule granules. Food industry granulation: cocoa, coffee, milk powder, fruit juice granules, seasonings, etc. Other industries granulation: pesticides, feed, fertilizers, pigments, dyes, chemicals, etc. Drying of powdery or granular wet materials. Coating: granule and pill protective coating, color preparation, sustained release, film, enteric coating, etc.   Equipment Classification Based on shape, it is divided into two main categories: horizontal and vertical. Horizontal is also known as a box-type fluidized bed dryer, and vertical is also known as a high-efficiency fluidized bed dryer. The working principle of horizontal and vertical dryers is the same.   Applicable Materials Powdered and granular materials in the pharmaceutical, chemical, and food industries.

High-efficiency fluidized bed dryers achieve drying by creating a high-speed airflow through small holes in the material bed, causing the material to boil. During this large-area contact between the gas and solid components, the moisture in the material evaporates rapidly. Therefore, the airflow distribution plate is a crucial component of a high-efficiency fluidized bed dryer. The airflow distribution plate in a high-efficiency fluidized bed dryer serves two purposes: supporting the material layer and ensuring uniform gas distribution.   The size, shape, distribution pattern, and orifice ratio of the distribution plate openings all have a significant impact on fluid distribution. Uneven gas distribution can cause "circulation" in the bed, which, in extreme cases, can lead to "channeling" in some areas while other areas remain stagnant. In this case, most of the gas short-circuits through certain channels in the bed, significantly worsening the gas-solid contact – a situation that should be avoided. A well-designed distribution plate should suppress unevenness in the bed; that is, when pressure drop decreases and airflow velocity increases in some areas of the bed, the resistance generated by the distribution plate should be able to suppress the increase in airflow, thereby preventing the deterioration of fluidization.   Currently, most fluidized bed dryers use a single type of airflow distribution plate, often a vertical perforated plate or a woven mesh plate. This easily leads to uneven fluidization or dead zones during material fluidization, failing to ensure the uniformity of the drug within the particles. Furthermore, the single perforation type cannot meet the production process requirements of different drugs.   On the other hand, to reduce drug leakage, multi-layer mesh structures are commonly used, with the airflow distribution plate and fluidized bed often fixed with numerous bolts. This makes disassembly inconvenient, difficult to clean, and can result in residues causing cross-contamination. Recommendation: Utilize computer fluid dynamics models and heat and mass transfer models to perform aerodynamic and thermodynamic simulations and verification of parameters such as hole spacing, hole diameter, and opening ratio during the design of the airflow distribution plate to meet the production process requirements of different materials. Regarding installation, the connection method should be detachable to ensure quick installation and thorough cleaning.

The three-dimensional mixer consists of a base, drive and chain transmission system, three-dimensional motion mechanism, mixing drum, and electrical control system. The mixing drum, whose inner wall contacts the material, is made of high-quality stainless steel and features a precision-polished inner wall.   1. Base:   The base is made of channel steel with an outer stainless steel cladding. Its rational structure effectively stabilizes the entire machine and fully complies with GMP requirements for pharmaceuticals.   2. Drive System:   The drive system comprises a motor, transmission chain, reduction system, and frequency converter control system. It offers smooth and reliable transmission with a simple design. The frequency converter effectively buffers the inertia of heavy-load starts and accurately selects the optimal position of the mixing drum when stopping, facilitating feeding or discharging.   3. Three-Dimensional Motion Mechanism:   To enable the mixing drum to perform complex rotational, translational, and rocking movements in three-dimensional space, the machine features a unique active and driven dual-axis and two-axis end three-dimensional motion rocker arm structure. The driven shaft is designed with flexibility, making the machine's movement lighter and more flexible, and facilitating debugging and maintenance. The Y-type three-dimensional motion rocker arm mechanism is made entirely of stainless steel, with an aesthetically pleasing design and polished finish, suitable for use in Class 100,000 to Class 1,000,000 cleanrooms. 4. Mixing Cylinder:   The mixing cylinder of this machine is positioned between two perpendicularly intersecting spatial shafts connected by a Y-type three-dimensional motion rocker arm. The mixing cylinder consists of a cylinder body, a truncated cone inlet, an eccentric cone outlet, an inlet, and an outlet device.   The mixing cylinder body is made of high-quality stainless steel, with polished inner and outer walls. The cylinder body has excellent airtightness, a smooth, burr-free surface, no dead corners, no residue, and is easy to clean.   The inlet uses a clamp-type flange seal, which is convenient to operate and provides excellent airtightness.   The outlet uses a uniquely designed eccentric cone; the asymmetrical design facilitates uniform mixing of materials. During discharge, the outlet is located at the lowest point of the mixing cylinder, ensuring complete material discharge.   The discharge valve adopts a butterfly valve with a unique design from our factory, which has good sealing performance, convenient discharge, and no residue.

Vacuum Rake Dryer Product Features: This machine adopts a large-area jacketed heating method, resulting in a large heat transfer surface and high thermal efficiency.   The machine is equipped with a stirrer, creating a continuous circulation of material within the drum, further improving the uniformity of heating.   The stirrer allows for the smooth drying of slurry, paste, and paste-like materials.   Working Principle: This machine is a novel horizontal intermittent vacuum drying device improved based on technology introduced from the Shanghai Chemical Equipment Research Institute. Wet material undergoes conduction evaporation, with a scraper stirrer continuously removing material from the heated surface and pushing it within the container to form a circulating flow. After the moisture evaporates, it is extracted by a vacuum pump.   Applications of Vacuum Rake Dryer: Suitable for drying the following materials in the pharmaceutical, food, and chemical industries: 1. Suitable for slurry, paste, and powder materials;   2. Heat-sensitive materials requiring low-temperature drying;   3. Easily oxidized, explosive, highly irritating, and highly toxic materials;   4. Materials requiring organic solvent recovery.

Mother liquor dryers are widely used in chemical, pharmaceutical, food, and environmental protection industries, especially when processing large quantities of mother liquor, where they offer significant advantages. In the environmental field, the main functions of mother liquor dryers are as follows:   1. Wastewater Treatment: Mother liquor dryers can treat various types of wastewater, such as coal chemical wastewater and other chemical wastewater. Through the concentration and recovery action of the evaporator, harmful substances in the wastewater can be removed or their concentration reduced, thus achieving wastewater purification. 2. Resource Recovery: While treating wastewater, mother liquor dryers can also recover useful substances from it. For example, in coal chemical wastewater, the dryer can concentrate and recover salts, enabling resource reuse.   3. Energy Saving and Emission Reduction: Mother liquor dryers utilize advanced evaporation technology. By recovering useful substances from wastewater, they can reduce the exploitation of natural resources, thereby achieving energy saving and emission reduction goals.   In summary, mother liquor dryers play an important role in the environmental protection field, enabling wastewater purification, resource recycling, and energy conservation and emission reduction. They are of great significance for promoting the healthy development of the green and renewable market.

In what situations are rake-type vacuum dryers used? They are used for drying wood and organic fertilizer. During the drying process, because the radial and tangential shrinkage rates of wood differ, the greater the difference between the two at the same moisture content, the greater the likelihood of cracking. If the difference in radial and tangential shrinkage rates is significant in the early stages of drying, surface cracking will occur. If the difference remains significant in the middle and later stages of drying, internal cracking is more likely to occur. To prevent these phenomena, wood drying technology must adopt spray-steam treatment (preheating treatment, central treatment, and post-treatment) to effectively reduce the degree of cracking or even completely prevent it.   Organic fertilizer drying equipment can be used to dry high-moisture, high-viscosity materials such as pig manure and chicken manure. Different organic fertilizer drying equipment should be selected for different materials; choosing the correct drying technology is crucial. Organic fertilizer is a material that is not easy to dry and tends to stick to the walls and clump. Only by designing organic fertilizer drying equipment according to the characteristics of the material can the nutritional value and quality of the finished organic fertilizer be ensured.

(1) In a conventional fluidized bed, material fluidization is achieved entirely by airflow, while in a vibrating fluidized bed, fluidization and conveying are primarily accomplished by vibration. Under the combined action of excitation force and hot air with a certain pressure, the material exhibits an ideal fluidization state, ensuring sufficient contact between the material and the hot air.   (2) The addition of vibration reduces the minimum fluidization velocity of the material, causing fluidization to occur earlier, especially in the particles near the bottom of the gas distribution plate, which helps eliminate wall phenomena and improves fluidization quality. (3) The hot air entering the dryer is mainly used for heat and mass transfer during the drying process. Higher inlet air temperature and increased material layer thickness result in higher thermal efficiency. The thermal efficiency of a typical vibrating fluidized bed dryer is between 30% and 60%. Therefore, the air volume is significantly reduced, only 20% to 30% of that in a conventional fluidized bed dryer. The load on the fine powder recovery system is reduced, and fine powder entrainment is generally decreased. The specifications of the supporting heat source, fan, cyclone separator, etc., are also reduced accordingly, resulting in significant energy savings.   (4) Vibrating fluidized beds can dry materials with a wide particle size distribution and relatively uniform residence time; they can also dry viscous or thermoplastic materials, reducing the requirements for material uniformity and regularity, and easily obtaining uniform dried products.   (5) The improved bed structure increases the heat transfer coefficient and phase interface area, and also increases the turbulence of the boundary layer, thus strengthening the drying process.

Disc drying is widely used in the production of pharmaceuticals, light industry, dyes, food, and certain fertilizers. It is particularly suitable for heat-sensitive materials such as milk, pharmaceuticals, and dyes, and occupies an important position in drying technology. The principle of disc dryer is to increase the contact area between the liquid and the gas phase by atomizing the liquid into fine mist in a hot air stream. For example, atomizing 1 cm³ of liquid into 10 μm spherical droplets increases the surface area by six thousand times, which greatly improves the drying speed, allowing the droplets to be dried into powder or fine particles in a very short time (a fraction of a second). The dryer body can be made into two types: vertical cylindrical (tower type) or horizontal (chamber type), with the tower type being more widely used. Compared with the aforementioned drying methods, disc drying has the following advantages: (1) The drying process is extremely fast in a high-temperature medium, while the surface temperature of the particles is still close to the wet-bulb temperature of the medium. Therefore, the quality of the dried product is good, heat-sensitive materials are not easily deteriorated, and fast-dissolving powder or hollow fine particles can be obtained. (2) The product that meets the requirements can be obtained directly from the slurry liquid, thereby eliminating the need for processes such as evaporation, crystallization, separation and crushing.

Iron powder, after high-temperature drying, readily reacts with oxygen to form iron oxide. A disc dryer can solve this problem. Disc dryers can also perform low-temperature drying, and more importantly, they can perform vacuum drying. Due to their completely enclosed nature, a vacuum can be applied internally during the drying process, thus preventing any reaction between the iron powder and oxygen. This allows for the precision production of iron powder. Therefore, the disc dryer is a highly suitable drying machine! Our company has been engaged in the design and production of drying equipment for many years and can provide you with high-quality disc dryers. Please contact us if you have any questions.

Prolonged operation or improper handling can cause material buildup in parts of the pressure spray dryer, affecting normal operation. In such cases, operation must be stopped for cleaning. To clean the material buildup inside the drying tower, open the cleaning door and use a long-handled broom to sweep away the material at the bottom of the funnel. Open the discharge valve and rinse the tower with tap water. Similarly, to remove dust from the cyclone separator, open the separator, sweep away the material with a broom, and rinse with water if necessary. For cleaning the bag filter, turn on the control switch and tap continuously, then open the cleaning door and tap the bag filter. Finally, replace the filter bag. For cleaning the slurry pipeline system, open the drain valve of the bidirectional filter, clean the filter screen and pipeline, then turn on the feed pump, replacing the feed with water, and clean the pump pipe, pressure stabilizer, and pipelines. After a period of operation, the spray granulation dryer needs necessary inspection and maintenance. For the feeding system, check the filters, pipelines, valves, nozzles, etc., for blockages, clean them regularly, and check nozzle wear for timely replacement. Check the feed pump for oil leaks, ensure proper pressure testing, and verify the oil level. For the blower, check for insufficient oil and overheating in the shaft and bearings, and observe for vibrations and noise. Clean the fan blades and perform balance adjustments if necessary. For the heater, check the heat pipes for proper functioning, and clean the filters at the oil pipes, oil pump, and oil nozzles if necessary. Additionally, pay attention to any overheating, vibrations, or abnormal noises in the motors, and ensure the instruments and electrical components in the control cabinet are functioning correctly.