Multi-process integrated chemical drying experimental device
By integrating the chemical drying experimental device, parallel experiments and real-time monitoring of multiple processes were realized, solving the problems of single function and unstable operation of existing devices, and improving the applicability and safety of the experiments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN BOHAI VOCATIONAL TECHN COLLEGE
- Filing Date
- 2026-03-27
- Publication Date
- 2026-06-09
AI Technical Summary
Existing chemical drying experimental equipment has limited functionality, cannot perform parallel experiments of multiple processes, has fragmented material pretreatment, drying operations and quality inspection, is unstable in operation, has low integration of hot air supply, lacks anti-sticking material structure, and is not environmentally friendly or safe enough.
Design a multi-process integrated chemical drying experimental device that integrates three processes: vibrating fluidized bed drying, spray drying, and fluidized bed drying. Equipped with anti-sticking sheet, uniform material plate, and insulation layer, it integrates pretreatment, drying, and detection modules, and is equipped with near-infrared online moisture detection and multi-stage exhaust gas purification to achieve multi-process switching and real-time monitoring.
It enables integrated operation of multi-process experiments, improves the applicability and stability of the device, simplifies the experimental process, ensures safety and environmental protection, and reduces heat loss and equipment failure risk.
Smart Images
Figure CN122170612A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of chemical experimental equipment technology, specifically to a multi-process integrated chemical drying experimental device. Background Technology
[0002] In chemical experiments, teaching and training, and small-scale research and development of new materials, drying equipment is a core experimental device. However, existing drying experimental devices often have many hardware-level defects: It has a single function and can only realize a single drying process. It cannot complete parallel experiments and comparative analysis of multiple processes such as vibrating fluidized bed drying, spray drying and fluidized bed drying, and its experimental applicability is poor. The material pretreatment, drying and product quality testing sections are independent of each other, and the hardware layout is scattered, making it impossible to form an integrated experimental process. The operation is cumbersome and the experimental continuity is insufficient. For viscous materials such as polyvinyl chloride resin powder and Shuanghuanglian granules, there is a lack of targeted anti-sticking and uniform material structure, which easily leads to problems such as material adhesion, uneven fluidization and incomplete drying. The hot air supply and pipeline layout have low integration, lack optimized insulation and vibration reduction design, resulting in high heat loss, poor equipment operation stability, and no supporting dust removal and purification hardware for exhaust gas, which does not meet environmental protection and experimental safety requirements.
[0003] Based on the aforementioned deficiencies in the existing technology, this invention discloses a multi-process integrated chemical drying experimental device, which optimizes the overall layout and core component structure, and solves the problems of existing devices having single functions, poor material adaptability, unstable operation, inconvenient operation, and insufficient safety and environmental protection. Summary of the Invention
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-process integrated chemical drying experimental device that enables independent switching between three processes: vibrating fluidized bed drying, spray drying, and fluidized bed drying. It is suitable for drying polyvinyl chloride resin powder and Shuanghuanglian granules. The optimized hardware structure achieves anti-sticking, material uniformity, heat preservation, and vibration reduction. It integrates pretreatment, drying, and testing sections, improving the applicability, stability, and safety of the device, and meeting the needs of chemical experiments and teaching training.
[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a multi-process integrated chemical drying experimental device, comprising a device frame, a vortex air pump fixedly connected to the inner bottom frame of the device frame, an electric heater fixedly connected to the output end of the vortex air pump, and a spray drying tower, a fluidized bed drying tower, and a vibrating fluidized bed dryer fixedly connected to the output end of the electric heater through a multi-way switching valve, and a cyclone separator fixedly connected to the tail gas ends of the spray drying tower, the fluidized bed drying tower, and the vibrating fluidized bed dryer; A hopper is fixedly connected to the upper surface of the device frame. A near-infrared online moisture meter is fixedly connected inside the device frame. A near-infrared online moisture display is fixedly connected to the outer surface of the near-infrared online moisture meter. Both the near-infrared online moisture meter and the near-infrared online moisture display are electrically connected to a 21-inch touch screen all-in-one electromechanical device. A peristaltic pump, a Karl Fischer moisture meter, a cassette furnace, and an electronic balance are fixedly connected to the upper surface of the device frame. A weighing bucket is placed on the upper surface of the electronic balance.
[0006] Preferably, a screw feeder is fixedly connected to the outer surface of the device frame, a feed hopper is fixedly connected to the upper surface of the device frame, the discharge end of the feed hopper is located on the upper part of the screw feeder, the discharge end of the screw feeder is located corresponding to the feed inlet of the vibrating fluidized bed dryer, and a vibrating fluidized bed dryer is fixedly connected to the outer surface of the device frame; a double-layer isolation plate is fixedly connected between the process area and the electrical area of the device frame.
[0007] Preferably, the inner wall of the vibrating fluidized bed dryer is covered with a polytetrafluoroethylene anti-stick and wear-resistant patch, the inlet and outlet of the vibrating fluidized bed dryer are fixedly connected with adjustable guide baffles and uniform material plates, and the outer wall of the vibrating fluidized bed dryer is fixedly connected with a heat insulation cover. The bottom of the vibrating fluidized bed dryer is fixedly connected to a gas distribution plate with a fish scale hole structure. A JGF-5 type spring shock absorber is fixedly connected between the vibrating motor of the vibrating fluidized bed dryer and the bed support. A cyclone separator and a PTFE bag dust collector are fixedly connected in sequence at the exhaust port of the vibrating fluidized bed dryer.
[0008] Preferably, the device frame is an integrated aluminum profile frame, and the bottom of the device frame is fixedly connected to universal casters with brakes; the material pretreatment module of the device frame is fixedly connected to an L-shaped conical stainless steel material tank (35L), an adjustable speed stirring paddle, a digital display viscometer, and an electronic balance; the dry powder quality detection module of the device frame is fixedly connected to an L-shaped polished inner wall dry powder temporary storage tank (10L), a Karl Fischer moisture analyzer, and an electronic balance.
[0009] Preferably, the electric heating is configured in three groups, with an insulation layer fixedly wrapped around the outside of the electric heating element, and a switching valve fixedly connected to the hot air duct.
[0010] Preferably, the spray drying tower is composed of three fixedly connected sections: a tower head, a high borosilicate glass tower body, and a tower bottom. A two-fluid atomizing nozzle is fixedly connected to the top of the spray drying tower. A peristaltic pump and an air compressor are fixedly connected to the spray drying tower. A glass cyclone separator and a star-shaped discharge valve are fixedly connected to the rear of the spray drying tower. A gas distribution plate is fixedly connected to the bottom of the fluidized bed drying tower. A glass cyclone separator is fixedly connected to the rear of the fluidized bed drying tower.
[0011] Preferably, the device frame is fixedly connected to a Pt100 resistance temperature sensor, a shock-resistant pressure gauge, and an audible and visual alarm. The fault monitoring points of the vortex air pump, electric heating, pipeline, screw feeder, and insulation layer are all electrically connected to the audible and visual alarm.
[0012] Preferably, the electric heating element is fixedly connected to a self-locking hardware for dry burning.
[0013] (III) Beneficial Effects Compared with the prior art, the present invention provides a multi-process integrated chemical drying experimental device, which has the following beneficial effects: 1. This multi-process integrated chemical drying experimental device integrates three processes—vibrating fluidized bed drying, spray drying, and fluidized bed drying—based on a frame. Multiple switching valves enable independent hot air supply to each drying unit, adapting to the drying experimental needs of different powder / granular materials such as polyvinyl chloride resin powder and Shuanghuanglian granules. Simultaneously, it integrates material pretreatment, drying operations, quality inspection, hot air supply, and exhaust gas purification modules into the same frame. Each component is precisely laid out and connected according to the experimental flow, eliminating the need for dispersed operation, significantly simplifying the experimental process, and meeting the operational needs of chemical experiments and teaching training.
[0014] 2. This multi-process integrated chemical drying experimental device addresses the problems of viscous materials easily sticking to the walls and uneven fluidization. It incorporates anti-sticking sheets on the inner wall of the vibrating fluidized bed dryer, adds a material leveling plate, and optimizes fluidization with a fish-scale perforated distribution plate. Spring dampers reduce vibration noise, and an insulation layer reduces heat loss, improving the overall operational stability of the device. It is also equipped with near-infrared online moisture detection, Pt100 temperature sensing, vibration-resistant pressure monitoring, and multi-fault point linkage audible and visual alarms. Combined with electric heating with self-locking during dry burning and a multi-stage exhaust gas dust removal and purification structure, it achieves real-time monitoring and control of the drying process while mitigating experimental hazards such as equipment dry burning, pipeline failures, and dust pollution from a hardware perspective, ensuring dual safety for both device operation and experimental procedures. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a multi-process integrated chemical drying experimental device according to the present invention; Figure 2 This is a schematic diagram of the structure of the vibrating fluidized bed dryer of the present invention.
[0016] In the diagram: 1. Vortex air pump; 2. Electric heating; 3. Spray drying tower; 4. Fluidized bed drying tower; 5. Cyclone separator; 6. Hopper; 7. Near-infrared online moisture meter; 8. Near-infrared online moisture display; 9. 21-inch touch screen all-in-one machine; 10. Peristaltic pump; 11. Karl Fischer moisture meter; 12. Cassette burner; 13. Electronic balance; 14. Weighing tank; 15. Screw feeder; 16. Feed tank; 17. Vibrating fluidized bed dryer; 18. Equipment frame. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Please see Figure 1-2 The present invention provides a new technical solution: a multi-process integrated chemical drying experimental device, including a vortex air pump 1 fixedly connected to the inner bottom frame of the device frame 18, an electric heater 2 fixedly connected to the output end of the vortex air pump 1, and the output end of the electric heater 2 being connected to a spray drying tower 3, a fluidized bed drying tower 4, and a vibrating fluidized bed dryer 17 respectively through multiple valves.
[0019] Cyclone separators 5 are fixedly connected to the tail gas ends of spray drying tower 3, fluidized bed drying tower 4, and vibrating fluidized bed dryer 17.
[0020] A hopper 6 is fixedly connected to the upper surface of the device frame 18, and the discharge port of the hopper 6 is positioned above the feed port of the vibrating fluidized bed dryer 17.
[0021] The device frame 18 is internally fixedly connected to a near-infrared online moisture meter 7, and the near-infrared online moisture meter 7 is externally fixedly connected to a near-infrared online moisture display 8. Both the near-infrared online moisture meter 7 and the near-infrared online moisture display 8 are electrically connected to a 21-inch touch screen all-in-one machine 9.
[0022] The upper surface of the device frame 18 is fixedly connected to a peristaltic pump 10, a Karl Fischer moisture meter 11, a cassette furnace 12, and an electronic balance 13.
[0023] A weighing bucket 14 is placed on the upper surface of the electronic balance 13.
[0024] A screw feeder 15 is fixedly connected to the outer surface of the device frame 18, and a feed hopper 16 is fixedly connected to the upper surface of the device frame 18. The discharge end of the feed hopper 16 is located on the upper part of the screw feeder 15.
[0025] The discharge end of the screw feeder 15 is correspondingly set at the feed inlet of the vibrating fluidized bed dryer 17, and the vibrating fluidized bed dryer 17 is fixedly connected to the outer surface of the device frame 18.
[0026] Further, the device is assembled as follows: The device frame 18 is placed on the experimental site, and the bottom casters are locked for positioning. A vortex pump 1 is fixed inside the bottom frame of the device frame 18. The output end of the vortex pump 1 is connected to an electric heater 2. The output end of the electric heater 2 is connected to a spray drying tower 3, a fluidized bed drying tower 4, and a vibrating fluidized bed dryer 17 via multi-way valves. The exhaust gas ends of all three drying devices are connected to a cyclone separator 5. A hopper 6, a peristaltic pump 10, a Karl Fischer moisture analyzer 11, a cassette furnace 12, and an electric... are sequentially fixed to the upper surface of the device frame 18. The electronic balance 13 is used as a sub-balance, and the weighing bucket 14 is placed on the electronic balance 13. The screw feeder 15 and the vibrating fluidized bed dryer 17 are fixed on the outer surface of the device frame 18. The feed bucket 16 is fixed on the upper surface of the device frame 18, so that the discharge end of the feed bucket 16 is aligned with the upper part of the screw feeder 15, and the discharge end of the screw feeder 15 is aligned with the feed port of the vibrating fluidized bed dryer 17. The circuits of the near-infrared online moisture meter 7, the near-infrared online moisture display 8, and the 21-inch touch screen all-in-one machine 9 are connected to test the hardware continuity and interlocking functions, and to calibrate the measuring instruments to ensure accuracy.
[0027] Experimental Operation: According to the experimental materials and process requirements, switch the pipeline valves, start the vortex air pump 1 and electric heater 2, and send hot air into the corresponding drying equipment through the pipeline; add the weighed wet material into the feed tank 16, and send it into the vibrating fluidized bed dryer 17 through the screw feeder 15, or send it into the spray drying tower 3 through the peristaltic pump 10; the material is fully in contact with the hot air in the drying equipment to complete the drying, and the dried material is collected by the cyclone separator 5. The exhaust gas is discharged after dust removal and purification; the moisture content of the material is detected by the near-infrared online moisture meter 7 and the Karl Fischer moisture meter 11. After the moisture content meets the standard, the experiment is completed.
[0028] Shutdown of the equipment: First turn off electric heater 2, and after the hot air outlet temperature drops below 50°C, turn off vortex air pump 1, stop the feeding and vibration mechanism, clean the residual materials in the equipment, and turn off all electrical components.
[0029] Furthermore, before using the device, the frame 18 is moved to the designated experimental site and the bottom casters with brakes are locked to secure the device. Then, all measuring instruments are calibrated to ensure the accuracy of the data from the electronic balance 13, Karl Fischer moisture analyzer 11, and near-infrared online moisture analyzer 7. Then, according to the experimental requirements, wet materials such as polyvinyl chloride resin powder or Shuanghuanglian granules are taken and placed in the weighing bucket 14. The material is accurately weighed using the electronic balance 13. If it is a liquid material, the weighed material is added to the liquid tank of the liquid pretreatment module, and the stirring paddle on the top of the tank is started to stir and pretreat at the set speed. If it is a powder or granular material, the weighed wet material is directly added to the feed bucket 16 for later use. At the same time, all pipeline valves, electrical connections, and dust removal and purification hardware are checked to ensure that the device is free of potential faults.
[0030] During the device startup phase, the hot air temperature and the opening and closing parameters of the pipeline valves corresponding to the drying process are first set through the 21-inch touch screen all-in-one machine 9. Then, the vortex air pump 1 is started, which continuously draws in outside air and delivers it to the electric heater 2. The three sets of electric heaters 2 operate at the set temperature. The independent temperature control heating structure precisely adjusts the hot air temperature. After the air is fully heated by the electric heater 2, it forms a constant temperature hot air. The hot air is delivered through the pipeline with the outer insulation layer. Through the precise control of the multi-way switching valve, the hot air is sent separately to the spray drying tower 3, the fluidized bed drying tower 4, or the vibrating fluidized bed dryer 17, realizing the independent switching operation of the three drying processes. Throughout the process, the pipeline air pressure is monitored by a shock-resistant pressure gauge, and the hot air temperature is monitored in real time by a Pt100 resistance temperature sensor. The data is synchronously transmitted to the 21-inch touch screen all-in-one machine 9.
[0031] If the vibrating fluidized bed drying process is selected, the wet material in the feed hopper 16 falls into the screw feeder 15 by gravity. The screw feeder 15 conveys the material to the feed inlet of the vibrating fluidized bed dryer 17 at a set speed. The hopper 6 can supplement the material. After the material enters the dryer, it is uniformly fluidized under the air distribution effect of the bottom fish scale hole structure gas distribution plate and the vibration action of the eccentric block vibrating motor. It fully contacts the hot air for heat exchange and drying. The polytetrafluoroethylene anti-stick and wear-resistant patch on the inner wall of the dryer prevents the material from sticking to the wall. The adjustable guide baffle and uniform material plate at the feed inlet and discharge outlet ensure uniform material flow. The heat insulation cover on the outer wall reduces heat loss. The JGF-5 type spring shock absorber between the fluidized bed cavity and the support reduces vibration noise and frame stress.
[0032] If the spray drying process is selected, the pretreated liquid is connected to the peristaltic pump 10. The peristaltic pump 10 delivers the liquid at a set flow rate to the two-fluid atomizing nozzle at the top of the spray drying tower 3. At the same time, the air compressor is started to provide compressed air to the atomizing nozzle. After the liquid is atomized by the nozzle, it forms tiny droplets, which come into instantaneous contact with the hot air entering the tower to complete the drying. The dried granular material settles in the tower and is collected at the bottom of the tower before entering the cyclone separator 5 for further separation.
[0033] If the fluidized bed drying process is selected, wet particles such as Shuanghuanglian granules are directly added into the fluidized bed drying tower 4. Hot air is evenly sent into the tower through the gas distribution plate at the bottom of the tower, so that the wet particles are in a fluidized state in the tower and fully contact the hot air to complete the drying. The fluidization process can be observed in real time through the tower body window.
[0034] During the drying process, the dust-laden exhaust gas generated by each drying device enters the cyclone separator 5, where the powder in the exhaust gas is separated and recovered through centrifugal force. The separated exhaust gas then enters the PTFE bag filter for secondary dust removal and purification, and is discharged after meeting the standards, thus realizing powder recovery and environmentally friendly exhaust gas treatment. At the same time, the near-infrared online moisture meter 7 detects the moisture content of the material in real time during the drying process. The detection data is synchronously transmitted to the near-infrared online moisture display 8 for on-site display, and the data is also uploaded to the 21-inch touch screen all-in-one machine 9. Experimenters can observe the drying status of the material in real time through the all-in-one machine and adjust the drying process parameters according to the moisture data.
[0035] Once the material has dried to the moisture content standard set in the experiment, the material feeding is stopped, and hot air continues to blow on the material inside the equipment for a period of time to complete the subsequent drying. Then, the dried material is collected by the cyclone separator 5 into the dry powder temporary storage tank of the dry powder quality detection module. A portion of the sample is taken and the offline moisture content is accurately detected by the Karl Fischer moisture analyzer 11. The experimental data is recorded to complete the detection step of the drying experiment.
[0036] After the experiment, first turn off the heating function of electric heater 2, and keep vortex air pump 1 running to allow cold air to continuously blow through the pipeline and drying equipment. When the Pt100 resistance temperature sensor detects that the hot air outlet temperature has dropped below 50°C, then turn off vortex air pump 1. This process relies on the dry-burning self-locking hardware of electric heater 2 to prevent dry burning damage to the equipment. Then, stop all moving mechanisms such as vibration motor, peristaltic pump 10, and screw feeder 15 in sequence, turn off the 21-inch touch screen all-in-one machine 9 and all electrical components, and finally open the cleaning ports of each drying equipment to clean the residual materials in the equipment and pipelines. Clean and maintain the dust removal equipment and testing instruments to complete the entire drying experiment process.
[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-process integrated chemical drying experimental device, characterized in that: The device includes a frame (18), with a vortex air pump (1) fixedly connected to the bottom frame inside the frame (18). An electric heater (2) is fixedly connected to the output end of the vortex air pump (1). The output end of the electric heater (2) is fixedly connected to a spray drying tower (3), a fluidized bed drying tower (4), and a vibrating fluidized bed dryer (17) respectively through a multi-way switching valve. Cyclone separators (5) are fixedly connected to the exhaust ends of the spray drying tower (3), the fluidized bed drying tower (4), and the vibrating fluidized bed dryer (17). A hopper (6) is fixedly connected to the upper surface of the device frame (18). A near-infrared online moisture meter (7) is fixedly connected inside the device frame (18). A near-infrared online moisture display (8) is fixedly connected to the outer surface of the near-infrared online moisture meter (7). Both the near-infrared online moisture meter (7) and the near-infrared online moisture display (8) are electrically connected to a 21-inch touch screen all-in-one machine (9). A peristaltic pump (10), a Karl Fischer moisture meter (11), a cassette furnace (12), and an electronic balance (13) are fixedly connected to the upper surface of the device frame (18). A weighing bucket (14) is placed on the upper surface of the electronic balance (13).
2. The multi-process integrated chemical drying experimental device according to claim 1, characterized in that: The outer surface of the device frame (18) is fixedly connected to a screw feeder (15), and the upper surface of the device frame (18) is fixedly connected to a feed hopper (16). The discharge end of the feed hopper (16) is located on the upper part of the screw feeder (15), and the discharge end of the screw feeder (15) is set to correspond to the feed port of the vibrating fluidized bed dryer (17). The outer surface of the device frame (18) is fixedly connected to the vibrating fluidized bed dryer (17). The process area and electrical area of the device frame (18) are fixedly connected to a double-layer isolation plate.
3. The multi-process integrated chemical drying experimental device according to claim 2, characterized in that: The inner wall of the vibrating fluidized bed dryer (17) is covered with polytetrafluoroethylene anti-stick and wear-resistant patches. The inlet and outlet of the vibrating fluidized bed dryer (17) are fixedly connected with adjustable guide baffles and uniform material plates. The outer wall of the vibrating fluidized bed dryer (17) is fixedly connected with heat insulation covers. The bottom of the vibrating fluidized bed dryer (17) is fixedly connected to a gas distribution plate with a fish scale hole structure. The vibrating motor of the vibrating fluidized bed dryer (17) is fixedly connected to the bed support with a JGF-5 type spring shock absorber. The exhaust port of the vibrating fluidized bed dryer (17) is fixedly connected to a cyclone separator (5) and a PTFE bag dust collector in sequence.
4. The multi-process integrated chemical drying experimental device according to claim 3, characterized in that: The device frame (18) is an integrated aluminum profile frame. The bottom of the device frame (18) is fixedly connected with universal wheels with brakes. The liquid pretreatment module of the device frame (18) is fixedly connected with a 35L conical 304 stainless steel liquid tank, an adjustable speed stirring paddle, a digital display viscometer, and an electronic balance (13). The dry powder quality detection module of the device frame (18) is fixedly connected with a 10L polished inner wall dry powder temporary storage tank, a Karl Fischer moisture analyzer (11), and an electronic balance (13).
5. The multi-process integrated chemical drying experimental device according to claim 4, characterized in that: The electric heating (2) is set to three groups. The electric heating (2) is externally wrapped with an insulation layer, and the hot air pipeline is fixedly connected with a switching valve.
6. The multi-process integrated chemical drying experimental device according to claim 5, characterized in that: The spray drying tower (3) is composed of three fixedly connected sections: tower head, high borosilicate glass tower body, and tower bottom. The top of the spray drying tower (3) is fixedly connected with a two-fluid atomizing nozzle. The spray drying tower (3) is equipped with a peristaltic pump (10) and an air compressor. The rear of the spray drying tower (3) is fixedly connected with a glass cyclone separator (5) and a star-shaped discharge valve. The bottom of the fluidized bed drying tower (4) is fixedly connected with a gas distribution plate. The rear of the fluidized bed drying tower (4) is fixedly connected with a glass cyclone separator (5).
7. The multi-process integrated chemical drying experimental device according to claim 6, characterized in that: The device frame (18) is fixedly connected to a Pt100 resistance temperature sensor, a shock-resistant pressure gauge, and an audible and visual alarm. The vortex air pump (1), electric heater (2), pipeline, screw feeder (15), and the fault monitoring points of the insulation layer are all electrically connected to the audible and visual alarm.
8. The multi-process integrated chemical drying experimental device according to claim 7, characterized in that: The electric heating (2) is fixedly connected to a self-locking hardware for air burning.