Drug intermediate drying equipment and energy-saving control process thereof

Abstract

The invention discloses medicine intermediate drying equipment and an energy-saving control process thereof, and relates to the technical field of medicine intermediate production. The equipment comprises a supporting table, a drying box, a supporting plate, a heating column, a lifter, a straight shaft, a linear servo motor, a detection longitudinal frame and the like. A plurality of independent material grooves distributed in a matrix mode are formed in the drying box, each material groove corresponds to an independent heating column, and independent heating of a single groove is achieved. The detection longitudinal frame is arranged, raw materials in the trough are detected through the infrared temperature sensor and the distance sensor, and detection areas are distinguished in combination with the positioning protrusions. The temperature and distance of raw materials are monitored in real time, the heating power of the heating column is dynamically adjusted, and one-time cutting type high-strength heating is avoided, so that accurate, efficient and energy-saving heating and drying of the drug intermediate can be achieved, energy waste is reduced, and the product quality stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pharmaceutical intermediate production, in particular to pharmaceutical intermediate drying equipment and an energy-saving control process thereof. Background Art

[0002] In the production of pharmaceutical intermediates, drying is a key process to ensure product purity, stability, and subsequent processing performance. However, existing drying equipment and processes still have many technical pain points in actual application, making it difficult to meet the production needs of high efficiency, precision, and energy saving. The specific manifestations are as follows:

[0003] Existing equipment often uses an integrated heating structure, heating the entire drying container with a single heat source. Because pharmaceutical intermediates are often stored in separate compartments within the same container, the distance and contact area between the raw materials and the heat source vary. This can easily lead to localized overheating or insufficient heating, resulting in inconsistent drying within the same batch of raw materials. Some raw materials can degrade due to overheating, while others retain residual moisture due to inadequate drying, impacting product quality and stability.

[0004] Furthermore, existing processes often employ a "one-size-fits-all" high-intensity heating mode to complete the heating and drying process within a specified process efficiency (timeframe). This means that high heating power is maintained regardless of the drying progress of each raw material zone. Continuing high-intensity heating even when some raw materials have already reached the drying requirements can not only lead to the raw material quality issues described above, but also result in redundant energy consumption.

[0005] Faced with the problems that are prone to occur during the drying process of the above-mentioned pharmaceutical intermediates, how to ensure the heating and drying efficiency of the pharmaceutical intermediate raw materials while reducing the adverse effects on the quality of the pharmaceutical intermediate raw materials and effectively avoiding the waste of heating energy has become a technical problem that needs to be solved. Summary of the Invention

[0006] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention provides a pharmaceutical intermediate drying device, comprising a support table, a drying box positioned on the upper side of the support table, a support plate positioned directly below the support table, an elevator for driving the support plate to vertically lift and lower, a straight shaft positioned directly above the drying box, and a linear servo motor for directional displacement on the straight shaft. The support table is provided with a plurality of vertically extending first through slots, the bottom surface of the drying box is provided with heat-conducting matching slots aligned with the first through slots, a plurality of heating columns are fixedly disposed on the upper side of the support plate, the heating columns pass upward through the first through slots and are inserted into the heat-conducting matching slots. The drying box is provided with a plurality of material slots distributed in a matrix, each material slot being independently aligned with a heat-conducting matching slot, and the drying box is also provided with a plurality of parallel positioning protrusions.

[0008] A detection vertical frame is fixedly installed on the bottom of the linear servo motor. At least two groups of horizontal coaxial sensing areas are embedded on the bottom of the detection vertical frame. Each group of coaxial sensing areas is equipped with multiple infrared temperature sensors and distance sensors facing the material trough. Two groups of coaxial sensing areas are set on the bottom of the detection vertical frame to increase the redundancy of distance detection and temperature detection. The sensors of the two groups of coaxial sensing areas can also be detected and compared with each other to avoid large errors in the detection of a single coaxial sensing area.

[0009] As a preferred technical solution of the device of the present invention, the support table is provided with a placement groove that matches the size of the drying box, a set of side walls of the placement groove are sliding slopes, and pressure probes are embedded in the four corners of the bottom surface of the placement groove.

[0010] As a preferred technical solution of the device of the present invention, the drying box includes side plates and partitions arranged vertically and horizontally, the material trough is located in the area between adjacent partitions and side plates, and positioning protrusions are provided on the top surfaces of the longitudinal partitions and side plates.

[0011] As a preferred technical solution for the device of the present invention, the top surface of the heating column is the heat-generating surface, equipped with a temperature module for monitoring its own heating temperature. The top surface of the heating column abuts and mates with the top surface of the thermally conductive matching groove. The drying box bottom plate is made of alloy metal, the bottom surface of the material trough is pre-coated with a first thermally conductive coating, and the top surface of the thermally conductive matching groove is pre-coated with a second thermally conductive coating.

[0012] As a preferred technical solution of the device of the present invention: the first thermal conductive coating layer and the second thermal conductive coating layer are graphene coating layers.

[0013] As a preferred technical solution of the device of the present invention: a vertical lifting shaft is provided at the output end of the lifter, the top end of the lifting shaft is fixedly connected to the bottom surface of the support plate. The vertical height dimension of the heating column is greater than the sum of the vertical height dimensions of the first through groove and the heat conducting matching groove.

[0014] As a preferred technical solution of the device of the present invention: among the multiple distance sensors and infrared temperature sensors in the same coaxial sensing area, at least one distance sensor and two infrared temperature sensors are configured within each trough area.

[0015] As a preferred technical solution of the device of the present invention: the number of infrared temperature sensors configured above each trough area is the same, and the number of distance sensors configured above each trough area is the same.

[0016] The present invention also provides an energy-saving control process for pharmaceutical intermediate drying equipment, which includes the following steps:

[0017] Step 1: Inject the pharmaceutical intermediate raw materials into the material trough of the drying box, ensuring that the height of the raw materials is lower than the top opening of the trough to complete the initial loading of the raw materials.

[0018] Step 2: Place the drying box loaded with raw materials at the corresponding position on the support table, aligning the heat conduction fitting groove on the bottom surface of the drying box with the first through groove of the support table.

[0019] Step 3: Start the lifter, drive the pallet to rise vertically, and lead the heating column on the pallet to pass upward through the first through groove of the support table and insert into the heat conduction fitting groove of the drying box.

[0020] Step 4: The heating column starts and enters the preheating stage. Monitor the heating temperature through its own temperature module until the preheating requirements preset by the system are met.

[0021] Step 5: After preheating, the heating column switches to the constant temperature mode, maintaining the preset temperature T0. At this time, the heating power of each heating column remains consistent.

[0022] Step 6: Start the linear servo motor, drive the detection vertical frame to move定向 along the straight axis, enter above the material groove area of the drying box, and start to detect the raw materials in the material groove.

[0023] Step 7: During the movement of the detection vertical frame, detect the distance change between the positioning protrusion and the material groove through the distance sensor. The system distinguishes the positioning protrusion area and the material groove area according to the distance state, only includes the temperature information detected by the infrared temperature sensor within the material groove area in the statistical scope, and counts the horizontal movement position of the material groove through the passing times of the positioning protrusion. Combine with the longitudinal fixed position information of the material groove to real-time locate the currently detected material groove.

[0024] Step 8: For the same material groove, the system collects the distance parameter set {D} detected by the distance sensor and the temperature parameter set {T} detected by the infrared temperature sensor, and calculates the distance average value D c and the temperature average value T c . Combine with the standard distance D s preset by the system, analyze the actual temperature reference value T m of the upper surface of the raw materials in the material groove = λ·T c , where λ is proportional to D c / D s .

[0025] Step 9: Compare the actual temperature reference value T m with the constant temperature T0 of the heating column. If T m <T0, adjust the temperature amplitude ΔT of the heating column according to the difference between the two to optimize the heating efficiency. Among them, ΔT is proportional to T0 - T m .

[0026] Step 10: When the heating duration reaches the total duration specified by the system, the heating column stops heating, and the lifter drives the pallet to descend, making the heating column disengage from the heat conduction fitting groove, completing the drying process of the pharmaceutical intermediate.

[0027] Compared with the existing technology, the beneficial effects of the present invention are:

[0028] 1. The present invention arranges an array of independent troughs within a drying box. Through independent heating of each trough, precise and independent distance and temperature detection and analysis, and dynamic power adjustment (heating on demand), energy waste caused by "one-size-fits-all" heating is avoided. The heating and drying process of pharmaceutical intermediate raw materials is completed efficiently and with low loss within the predetermined heating and drying time.

[0029] 2. The distance sensing and temperature sensing in the present invention adopt a double-group coaxial sensing area design, and use positioning protrusions to assist in positioning, complete the analysis and calculation of the distance and temperature of the raw materials in the independent trough, and perform temperature compensation analysis to ensure the temperature detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0031] Figure 2 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0032] Figure 3 This is a schematic diagram of the disassembled structure of the components of the device in the present invention.

[0033] Figure 4 for Figure 3 Schematic diagram of the structure with a partial enlargement at point B.

[0034] Figure 5 It is a schematic diagram of the assembly structure of the device of the present invention.

[0035] Figure 6 It is a schematic diagram of the structural decomposition of the device of the present invention.

[0036] Figure 7 for Figure 6 Schematic bottom view of the middle component.

[0037] Figure 8 It is a bottom side bottom view of the detection vertical frame in the present invention.

[0038] Among them: 1-support platform, 101-placement groove, 102-sliding slope, 103-pressure probe, 104-first through groove; 2-drying box, 201-side plate, 202-partition, 203-material trough, 204-positioning protrusion, 205-first thermal conductive coating, 206-thermal conductive matching groove, 207-second thermal conductive coating, 208-pushing connection part; 3-support plate; 4-heating column; 5-lifter, 501-lifting axis; 6-straight axis; 7-linear servo motor; 8-detection vertical frame, 801-coaxial sensing area, 802-infrared temperature sensor, 803-distance sensor. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] Example 1: The present invention designs a drug intermediate drying device that realizes precise heating and drying of drug intermediates through modular design, and combines sensors and control systems to achieve energy-saving control. Figure 1 、 Figure 2 、 Figure 3 The core structure of the present invention includes a support table 1, a drying box 2, a support plate 3, a heating column 4, a lifter 5, a straight axis 6, a linear servo motor 7, a detection vertical frame 8, etc. The specific configuration is as follows:

[0041] like Figure 1 、 Figure 2 、 Figure 4 The support platform 1 is equipped with multiple vertical through-slots 104, a placement slot 101 adapted for the drying box 2, a sliding ramp 102, and pressure probes 103 at the four corners. The placement slot 101 provides a positioning reference for the drying box 2, while the sliding ramp 102 facilitates quick placement and removal of the drying box 2 (reducing manual operation). The pressure probes 103 detect pressure changes to determine whether the drying box 2 is properly placed (ensuring precise alignment of the subsequent heating column 4 with the thermally conductive matching groove 206). The first through-slot 104 provides a lifting channel for the heating column 4, ensuring smooth insertion of the heating column 4 into the thermally conductive matching groove 206 of the drying box 2.

[0042] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 6The drying box 2 includes side panels 201 and crisscrossing partitions 202, forming a matrix of multiple troughs 203. Positioning protrusions 204 are located on the top surfaces of the longitudinal partitions 202 and side panels 201. The troughs 203 independently separate the pharmaceutical intermediates, and each trough 203 is aligned with an independent thermally conductive matching slot 206 (enabling independent heating control for each slot). The positioning protrusions 204, in conjunction with a distance sensor 803, distinguish between the trough 203 area and the non-detection area, ensuring that temperature detection is limited to the raw materials.

[0043] The bottom surface of the drying box 2 features a thermally conductive matching groove 206 aligned with the first through-groove 104. The bottom surface of the feed trough 203 is coated with a first thermally conductive coating 205, while the top surface of the thermally conductive matching groove 206 is coated with a second thermally conductive coating 207 (both made of graphene). The graphene-based thermal coatings used in the first and second thermally conductive coatings 205 and 207 offer extremely high thermal conductivity, efficiently transferring heat from the heating column 4 to the feed material in the feed trough 203 (reducing heat loss and improving thermal efficiency). The alloy metal base of the drying box 2 further enhances thermal conductivity, ensuring even heat transfer to the feed material.

[0044] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 、 Figure 7 , multiple heating columns 4 are fixed on the support plate 3, and the lifter 5 drives the support plate 3 to rise and fall vertically through the lifting shaft 501 (the vertical height of the heating column 4 is greater than the sum of the heights of the first through groove 104 and the heat-conducting matching groove 206), realizing the "docking-separation" switching between the heating column 4 and the heat-conducting matching groove 206 (docking during heating, separation after drying is completed to avoid excessive heating due to residual heat). The precise docking of the heating column 4 and the heat-conducting matching groove 206 (positioned by the placement groove 101 of the support platform 1) ensures that the heat transfer path is shortest (reducing heat loss). The top surface of the heating column 4 is the heat-generating surface, and is equipped with a temperature module (real-time monitoring of its own temperature), which abuts the top surface of the heat-conducting matching groove 206. The heating column 4 is the core heating component, and the temperature module is used to achieve precise temperature control (reaching the preset temperature in the preheating stage and maintaining T0 in the constant temperature stage). Independent heating columns 4 correspond to independent material troughs 203 (the heating power of each heating column 4 can be adjusted individually through the control system to achieve differentiated heating and avoid energy waste).

[0045] like Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 8The straight axis 6 provides a motion track for the linear servo motor 7, which drives the detection frame 8 in directional motion. The linear servo motor 7 drives the detection frame 8 along the top of the drying box 2, achieving full coverage of all troughs 203. The bottom surface of the detection frame 8 has at least two sets of coaxial sensing areas 801, each containing multiple infrared temperature sensors 802 (corresponding to troughs 203) and distance sensors 803. The distance sensors 803 detect the distance changes between the positioning protrusion 204 and the trough 203 to distinguish between the "positioning protrusion area" and the "trough area" (only the temperature data of the trough area is included in the statistics to eliminate interference). The infrared temperature sensor 802 detects the upper surface temperature of the raw material. The two sets of coaxial sensing areas 801 provide redundant detection (data comparison reduces errors and improves detection reliability). Each trough 203 is equipped with at least one distance sensor 803 and two infrared temperature sensors 802 to ensure the accuracy of the data for each trough.

[0046] Example 3: The energy-saving control process of the present invention is based on the equipment structure of the above-mentioned Example 1, and realizes efficient energy utilization through precise detection and dynamic regulation. The specific process is as follows:

[0047] (1) Raw material loading and equipment preparation:

[0048] Pour the pharmaceutical intermediate raw material into the material trough 203 of the drying box 2, and ensure that the height of the raw material is lower than the top opening of the material trough 203 (to avoid the sensor from accidentally touching the raw material during detection).

[0049] The drying box 2 is placed in the placement groove 101 of the support platform 1, and the sliding slope 102 assists in positioning. After all the pressure probes 103 of the support platform 1 detect the pressure signal, it is determined that the drying box 2 is placed in place (make sure that the thermal conductive matching groove 206 is accurately aligned with the first through groove 104).

[0050] (2) Heating system startup and preheating:

[0051] The lifter 5 drives the lifting shaft 501 to rise, driving the support plate 3 and the heating column 4 to move upward, so that the heating column 4 passes through the first through slot 104 of the support table 1 and is inserted into the heat-conducting matching slot 206 of the drying box 2 (the top surface of the heating column 4 abuts against the top surface of the heat-conducting matching slot 206).

[0052] The heating column 4 starts and monitors the heating temperature through its own temperature module until it reaches the system preset preheating temperature (to ensure that the bottom plate of the drying box 2 and the thermal conductive coating are fully preheated to reduce subsequent temperature fluctuations).

[0053] (3) Constant temperature drying and real-time detection:

[0054] The heating columns 4 are switched to the constant temperature mode to maintain the preset temperature T0 (at this time, the power of each heating column 4 is consistent, providing a basic heat source for the raw material).

[0055] The linear servo motor 7 is started, driving the detection vertical frame 8 to move along the straight axis 6 in a directional manner and enter the area above the material trough 203 of the drying box 2.

[0056] During the detection process, the distance sensor 803 distinguishes the positioning protrusion 204 area from the material trough 203 area by detecting the change in the distance between the positioning protrusion 204 and the material trough 203 (only the detection data of the infrared temperature sensor 802 in the material trough 203 area is included in the statistics).

[0057] The system counts the lateral position of the trough 203 by the number of times the positioning protrusion 204 passes by, and locates the currently detected trough 203 in real time in combination with the longitudinal fixed position information of the trough 203.

[0058] (IV) Compensation and power regulation:

[0059] For the same trough 203, the system calculates the average distance D detected by the distance sensor 803 c and the average temperature T detected by the infrared temperature sensor 802 c .

[0060] According to the preset standard distance D s , through the formula T m =λ·T c (λ and D c / D s Calculate the actual temperature reference value T on the raw material surface m (Eliminate the impact of distance changes on temperature detection).

[0061] When T m When T0 is less than the system, the system will m ) Adjust the temperature amplitude ΔT of the heating column 4 (ΔT is related to T0-T m ), increase the power of the heating column 4 corresponding to the trough 203 (to achieve heating on demand and reduce energy waste).

[0062] (V) Drying completion and system reset:

[0063] After the preset total heating time is reached, the heating column 4 stops heating, and the lifter 5 drives the support plate 3 to descend, so that the heating column 4 is separated from the heat-conducting matching groove 206 (to prevent residual heat from overheating the raw materials).

[0064] The drying box 2 is taken out manually or mechanically through the sliding slope 102 of the support platform 1 to complete the drying process.

[0065] (6) Energy-saving control core logic:

[0066] The present invention utilizes the positioning protrusion 204 in conjunction with the distance sensor 803 to ensure that the temperature detection is only targeted at the raw material area (avoiding invalid detection).

[0067] The present invention reduces detection errors (avoids power misadjustment due to misjudgment) by performing redundant detection and data comparison of sensors in the dual coaxial sensing areas 801 .

[0068] The present invention is based on the actual temperature T of the raw material m Dynamically adjust the power of the heating columns 4 (no need for all heating columns 4 to maintain high power, achieving differentiated energy-saving control).

[0069] The present invention reduces heat loss and improves heat utilization (reduces energy consumption per unit drying amount) through the graphene thermal conductive coating and the alloy metal bottom plate.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pharmaceutical intermediate drying device, characterized in that: It comprises a support platform (1), a drying box (2) placed on the upper side of the support platform (1), a support plate (3) located directly below the support platform (1), a lifter (5) for driving the support plate (3) to vertically lift, a straight shaft (6) located directly above the drying box (2), and a linear servo motor (7) for directional displacement on the straight shaft (6); The support platform (1) is provided with a plurality of vertically penetrating first through slots (104); the bottom surface of the drying box (2) is provided with heat-conducting matching slots (206) aligned with the first through slots (104); a plurality of heating columns (4) are fixedly arranged on the upper side of the support plate (3); the heating columns (4) pass upward through the first through slots (104) and are inserted into the heat-conducting matching slots (206); The drying box (2) is provided with a plurality of material slots (203) distributed in a matrix position, each material slot (203) is independently aligned with a heat-conducting matching slot (206), and the drying box (2) is further provided with a plurality of positioning protrusions (204) arranged in parallel; A detection vertical frame (8) is fixedly mounted on the bottom surface of the linear servo motor (7), and at least two groups of transverse coaxial sensing areas (801) are embedded on the bottom surface of the detection vertical frame (8). Each group of coaxial sensing areas (801) is equipped with a plurality of infrared temperature sensors (802) and distance sensors (803) facing the material trough (203).

2. A pharmaceutical intermediate drying device according to claim 1, characterized in that: The support platform (1) is provided with a placement groove (101) having a size matching that of the drying box (2), and a set of side walls of the placement groove (101) is a sliding slope (102); Pressure probes (103) are embedded at the four corners of the bottom surface of the placement groove (101).

3. The pharmaceutical intermediate drying device according to claim 1, characterized in that: The drying box (2) comprises side plates (201) and partitions (202) that are vertically and horizontally staggered, and the material trough (203) is located in the area between adjacent partitions (202) and side plates (201); The positioning protrusions (204) are arranged on the top surfaces of the longitudinal partition (202) and the side plate (201).

4. The pharmaceutical intermediate drying device according to claim 1, characterized in that: The top surface of the heating column (4) is its heat generating surface. The heating column (4) is equipped with a temperature module for monitoring its own heating temperature. The top surface of the heating column (4) is in abutment with the top surface of the heat conducting matching groove (206). The bottom plate of the drying box (2) is made of alloy metal, the bottom surface of the material slot (203) is pre-disposed with a first thermal conductive coating (205), and the top surface of the thermal conductive matching slot (206) is pre-disposed with a second thermal conductive coating (207).

5. The pharmaceutical intermediate drying device according to claim 4, characterized in that: The first thermal conductive coating (205) and the second thermal conductive coating (207) are made of graphene material.

6. The pharmaceutical intermediate drying device according to claim 1, characterized in that: A vertically lifting lifting shaft (501) is provided at the output end of the lifter (5), and the top end of the lifting shaft (501) is fixedly connected to the bottom surface of the support plate (3); The vertical height dimension of the heating column (4) is greater than the sum of the vertical height dimensions of the first through groove (104) and the heat-conducting matching groove (206).

7. The pharmaceutical intermediate drying device according to claim 1, characterized in that: Among the multiple distance sensors (803) and infrared temperature sensors (802) in the same coaxial sensing area (801), at least one distance sensor (803) and two infrared temperature sensors (802) are configured within the area of ​​each trough (203).

8. The pharmaceutical intermediate drying device according to claim 1, characterized in that: The number of infrared temperature sensors (802) configured above each trough (203) area is the same; The number of distance sensors (803) configured above each trough (203) area is the same.

9. An energy-saving control process applied to the pharmaceutical intermediate drying equipment according to any one of claims 1 to 8, characterized in that: It includes the following content: Step 1: inject the pharmaceutical intermediate raw material into the material trough (203) of the drying box (2), ensuring that the height of the raw material is lower than the top opening of the material trough (203), completing the initial loading of the raw material; Step 2: Place the drying box (2) loaded with raw materials at a corresponding position on the support platform (1), so that the heat-conducting matching groove (206) on the bottom surface of the drying box (2) is aligned with the first through groove (104) of the support platform (1); Step three: start the lifter (5), drive the support plate (3) to rise vertically, drive the heating column (4) on the support plate (3) to pass through the first through slot (104) of the support table (1) upward, and insert into the heat-conducting matching slot (206) of the drying box (2); Step 4: The heating column (4) starts and enters the preheating stage, and monitors the heating temperature through its own temperature module until it reaches the preheating requirement preset by the system; Step 5: After preheating is completed, the heating column (4) switches to a constant temperature mode to maintain a preset temperature T0, and at this time, the heating power of each heating column (4) remains consistent; Step 6: Start the linear servo motor (7), drive the detection longitudinal frame (8) to move along the straight axis (6) in a directional manner, enter the area above the material trough (203) of the drying box (2), and start to detect the raw materials in the material trough (203); Step 7: During the movement of the vertical frame (8), the distance sensor (803) is used to detect the change in the distance between the positioning protrusion (204) and the trough (203). The system distinguishes the positioning protrusion (204) area and the trough (203) area according to the distance state, and only the temperature information detected by the infrared temperature sensor (802) in the trough (203) area is included in the statistical range; Step 8: For the same trough (203), the system collects the distance parameter set {D} detected by the distance sensor (803) and the temperature parameter set {T} detected by the infrared temperature sensor (802), and calculates the distance mean D c and the mean temperature T c ; Combined with the system preset standard distance D s , analyze the actual temperature reference value T of the upper surface of the raw material in the trough (203) m =λ·T c , where λ and D c / D s Directly proportional.

10. Step Nine: If T m < T0, then adjust the temperature amplitude ΔT of the heating column (4) according to the difference between the two to optimize the heating efficiency, where ΔT and T0-T m proportional to; Step 10: When the heating time reaches the total time specified by the system, the heating column (4) stops heating, and the lifter (5) drives the support plate (3) to descend, so that the heating column (4) is separated from the heat-conducting matching groove (206), completing the drying process of the drug intermediate.

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