Rotary drum type drying equipment

Abstract

The utility model discloses rotary drum type drying equipment which comprises a base, a water drum, a storage box, a vertical rotary drum and a transverse rotary drum, the water drum and the storage box are arranged on the base, the vertical rotary drum is rotationally connected with the top of the water drum, the transverse rotary drum is located between the water drum and the storage box, and drying equipment is arranged on the transverse rotary drum. The other end of the transverse rotary drum communicates with the storage box through a second discharging pipe, an annular plate is arranged at the end of the second discharging pipe, an exhaust pipe is arranged on the second discharging pipe, and an arc-shaped cavity and an exhaust assembly arranged in the arc-shaped cavity are arranged in the second discharging pipe; according to the medical intermediate drying device, medical intermediates are preliminarily dried through rotary dehydration of the vertical rotary drum, then further rotary drying is conducted through the transverse rotary drum, the medical intermediates are dried more evenly through the rotary drum rotation mode, and the drying degree of the medical intermediates can be further improved through rotation of the rotary drums in the two directions.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a rotary drum drying equipment. Background Art

[0002] Pharmaceutical intermediates refer to intermediate compounds used to synthesize drugs in the pharmaceutical process. They are key intermediates that are gradually synthesized from APIs or natural products through a series of organic synthesis reactions. Pharmaceutical intermediates play an important role in drug research and development and production. They are one of the key steps in converting molecules with therapeutic activity into final drugs. By controlling the synthesis route of intermediates and optimizing reaction conditions, efficient and sustainable drug production can be achieved.

[0003] Pharmaceutical intermediates have complex structures and properties, and traditional drying methods often fail to meet their drying requirements. Most existing drying equipment uses continuous high-temperature drying. Although the water removal efficiency is high, it is easy to cause thermal damage to pharmaceutical intermediates and increase gas pressure, causing explosions. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a rotary drum drying device.

[0005] The technical solution of the utility model is: a rotary drum drying equipment, comprising a base, a water drum and a storage box arranged on the base, a vertical rotary drum rotatably connected to the top of the water drum, and a transverse rotary drum located between the water drum and the storage box, one end of the transverse rotary drum is connected to the vertical rotary drum, and the other end of the transverse rotary drum is connected to the storage box through a second discharge pipe; a drying equipment is arranged on the transverse rotary drum; the second discharge pipe is fixedly connected to the storage box, and an exhaust pipe is arranged on the second discharge pipe, a ring plate is provided at the end of the second discharge pipe to be rotatably sealed with the transverse rotary drum, an arc-shaped cavity docking with the exhaust pipe is arranged in the second discharge pipe, an air outlet hole connected to the arc-shaped cavity and the transverse rotary drum is arranged on the ring plate, and an exhaust component for opening or closing the exhaust pipe is arranged in the arc-shaped cavity.

[0006] Furthermore, the exhaust assembly includes a piston rod with one end slidingly sealing and blocking the air outlet, a first baffle fixedly connected to the other end of the piston rod, and a second airbag rod used to connect the first baffle and the side wall of the arc-shaped cavity, the exhaust pipe passes through the inner wall of the second discharge pipe, and the first baffle is used to slide and seal and block the exhaust pipe.

[0007] Description: When the air pressure inside the horizontal drum is too high due to long-term high-temperature drying, the piston rod is automatically pushed by the air pressure and synchronously pushes the first baffle to move, so that the air outlet is connected with the arc-shaped cavity and the exhaust pipe, realizing automatic exhaust.

[0008] Furthermore, the side wall of the second discharge pipe, the side wall of the ring plate, and the side wall of the transverse rotating drum correspond to the first cavity, the second cavity, and the third cavity in sequence, and the first cavity, the second cavity, and the third cavity are connected in sequence. The drying equipment includes a high-temperature water tank connected to the first cavity through a high-temperature water inlet pipe and a high-temperature water outlet pipe, and a low-temperature water tank connected to the first cavity through a low-temperature water inlet pipe and a low-temperature water outlet pipe. A second baffle for slidingly sealing and blocking the low-temperature water inlet pipe or the high-temperature water inlet pipe is provided in the first cavity, and a first airbag rod for connecting the second baffle with the second airbag rod, and the first airbag rod passes through the inner wall of the second discharge pipe through a connecting pipe and is connected to the second airbag rod; the low-temperature water outlet pipe and the high-temperature water outlet pipe are both provided with a control mechanism for controlling the opening or closing of water outlet.

[0009] Description: By setting up a high-temperature water tank and a low-temperature water tank, when the air pressure is too high and the horizontal drum is automatically exhausted after a long period of high-temperature drying, the second baffle can be driven to slide and the low-temperature water inlet pipe starts to flow in water, diluting the temperature of the high-temperature water, thereby reducing the drying temperature of the horizontal drum and automatically switching to low-temperature drying, preventing excessive high temperature from causing thermal damage to the pharmaceutical intermediates and making the drying more uniform.

[0010] Furthermore, the control mechanism includes a water level monitor arranged in the high-temperature water tank and the low-temperature water tank, a switch valve arranged on the high-temperature water outlet pipe and the low-temperature water outlet pipe, and a controller arranged on the second discharge pipe, and the water level monitor and the switch valve are both electrically connected to the controller.

[0011] Note: When the air pressure continues to increase until the second baffle is driven to completely close the high-temperature water inlet pipe, and the water level in the high-temperature water tank is detected to have reached the highest point through the water level monitoring meter, the high-temperature water outlet pipe is closed and a complete separate circulation of the low-temperature water tank is performed, switching to the lowest temperature drying state.

[0012] Furthermore, the water cylinder is provided with a first conveying pipe rotatably connected thereto and a first discharge pipe communicating with the first conveying pipe and the vertical rotating cylinder, one end of the first conveying pipe penetrates through a side wall of one side of the water cylinder and is connected with one end of the horizontal rotating cylinder, a water filter net is provided at the bottom of the vertical rotating cylinder, the water cylinder is provided with a second conveying pipe fixedly connected thereto, the second conveying pipe is provided with a spiral conveying shaft extending into the first conveying pipe, the spiral conveying shaft penetrates through the other side wall of the water cylinder and is fixedly connected to the output shaft of a motor arranged on the base.

[0013] Description: Without affecting the rotation of the horizontal drum and the first conveying tube, the transfer efficiency of the pharmaceutical intermediates from the vertical drum to the horizontal drum can be improved by setting the second conveying tube and the spiral conveying shaft.

[0014] Furthermore, a rotating device for driving the horizontal rotating drum and the vertical rotating drum to rotate is provided on the base, and the rotating device includes a first gear sleeved on the spiral conveying shaft, a second gear sleeved on the vertical rotating drum, and a third gear sleeved on the second conveying pipe, and the second gear is meshed with the first gear and the third gear for transmission.

[0015] Note: By driving the vertical drum and the horizontal drum to rotate through the rotation of the screw conveyor shaft, the amount of motor settings can be reduced, thereby reducing energy loss.

[0016] The beneficial effects of the utility model are:

[0017] (1) The rotary drum drying equipment of the utility model first performs preliminary drying of the pharmaceutical intermediates by rotating and dehydrating the pharmaceutical intermediates in a vertical rotary drum, and then further performs rotary drying by a horizontal rotary drum. The rotation of the rotary drum makes the drying of the pharmaceutical intermediates more uniform, and the rotation of the rotary drum in two directions can further improve the drying degree of the pharmaceutical intermediates.

[0018] (2) The rotary drum drying equipment of the utility model autonomously controls the opening or closing of the exhaust pipe according to the internal air pressure of the horizontal rotary drum, and automatically adjusts from high-temperature drying to low-temperature drying when the air pressure is too high for exhaust, thereby reducing the thermal damage of high temperature to the pharmaceutical intermediates, realizing alternating hot and cold drying, improving the fluidity and uniformity of the air during the drying process, and preventing local overheating or overhumidification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structure diagram of the rotary drum drying device embodiment 1 of the utility model;

[0020] Figure 2 This is a diagram showing the internal structure of the water drum of the rotary drum drying device of the utility model in Embodiment 1;

[0021] Figure 3 This is a structural diagram of a vertical drum of a rotary drum drying device of the utility model;

[0022] Figure 4 This is a diagram showing the internal structure of the second discharge pipe of the rotary drum drying device of the utility model;

[0023] Figure 5 This is a horizontal end view of the rotary drum of Embodiment 2 of the rotary drum drying equipment of the present utility model;

[0024] Figure 6 This is the overall structure diagram of the rotary drum drying device embodiment 3 of the utility model;

[0025] Figure 7 This is a diagram showing the internal structure of the second discharge pipe of the rotary drum drying device of the utility model in Embodiment 3;

[0026] Among them, 1-base, 11-motor, 2-water cylinder, 21-first conveying pipe, 211-screw conveying shaft, 212-first gear, 22-first discharge pipe, 23-second conveying pipe, 231-third gear, 3-storage box, 4-vertical rotating drum, 41-water filter net, 42-second gear, 5-horizontal rotating drum, 51-second discharge pipe, 511-arc cavity, 512-first airbag rod, 513-connecting pipe, 514-first baffle, 515-piston rod, 516-second airbag rod, 517-second baffle, 52-exhaust pipe, 53-low-temperature water tank, 531-low-temperature water inlet pipe, 532-low-temperature water outlet pipe, 54-high-temperature water tank, 541-high-temperature water inlet pipe, 542-high-temperature water outlet pipe, 55-air outlet, 56-ring plate. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0028] Embodiment 1: A rotary drum drying device, such as Figure 1 As shown, it comprises a base 1, a water cylinder 2 and a storage box 3 arranged on the base 1, a vertical rotating cylinder 4 rotatably connected to the top of the water cylinder 2, and a transverse rotating cylinder 5 located between the water cylinder 2 and the storage box 3, one end of the transverse rotating cylinder 5 is connected to the vertical rotating cylinder 4, and the other end of the transverse rotating cylinder 5 is connected to the storage box 3 through a second discharge pipe 51, and a drying device is arranged on the transverse rotating cylinder 5, and the drying device adopts the existing technology, such as an electric heater arranged in the transverse rotating cylinder 5;

[0029] like Figure 2 As shown, the base 1 is provided with a rotating device for driving the horizontal rotating drum 5 and the vertical rotating drum 4 to rotate, and the rotating device includes a first gear 212 sleeved on the spiral conveying shaft 211, a second gear 42 sleeved on the vertical rotating drum 4, and a third gear 231 sleeved on the second conveying pipe 23, and the second gear 42 and the first gear 212 and the third gear 231 are all meshed for transmission;

[0030] like Figure 4 and Figure 5 As shown, the second discharge pipe 51 is fixedly connected to the storage box 3, and the second discharge pipe 51 is provided with an exhaust pipe 52, the end of the second discharge pipe 51 is provided with a ring plate 56 that is rotatably sealed and connected to the transverse rotating drum 5, and the second discharge pipe 51 is provided with an arc-shaped cavity 511 that is connected to the exhaust pipe 52, and the ring plate 56 is provided with an air outlet 55 that is connected to the arc-shaped cavity 511 and the transverse rotating drum 5, and the arc-shaped cavity 511 is provided with an exhaust component for opening or closing the exhaust pipe 52, and the exhaust component adopts the existing technology, such as a switch valve arranged on the first discharge pipe 22, the second discharge pipe 51 and the exhaust pipe 52;

[0031] like Figure 2 and Figure 3 As shown, the water cylinder 2 is provided with a first conveying pipe 23 rotatably connected thereto and a first discharge pipe 22 communicating with the first conveying pipe 23 and the vertical rotating cylinder 4. One end of the first conveying pipe 23 penetrates a side wall of the water cylinder 2 and communicates with one end of the horizontal rotating cylinder 5. A water filter net 41 is provided at the bottom of the vertical rotating cylinder 4.

[0032] like Figure 1 and Figure 2 As shown, the water cylinder 2 is provided with a second conveying pipe 21 fixedly connected thereto, and the second conveying pipe 21 is provided with a spiral conveying shaft 211 extending into the first conveying pipe 23, the spiral conveying shaft 211 penetrates the other side wall of the water cylinder 2 and is fixedly connected to the output shaft of the motor 11 arranged on the support plate on the base 1, and the motor 11 is a commercially available rotating motor; the base 1 is provided with a rotating device for driving the horizontal rotating drum 5 and the vertical rotating drum 4 to rotate, and the rotating device includes a first gear 212 mounted on the spiral conveying shaft 211, a second gear 42 mounted on the vertical rotating drum 4, and a third gear 231 mounted on the second conveying pipe 23, and the second gear 42 and the first gear 212 and the third gear 231 are all meshed for transmission.

[0033] The working principle of the above rotary drum drying equipment is as follows: first, add the pharmaceutical intermediate (such as p-methoxybenzoic acid) into the vertical rotary drum 4, turn on the motor 11, and the first gear 212 drives the second gear 42 to rotate, that is, drives the vertical rotary drum 4 to rotate on the top of the water drum 2 for preliminary drying, and the water falls from the water filter 41 at the bottom of the vertical rotary drum 4 into the water drum 2 and is discharged;

[0034] After the preliminary drying is completed, the switch valve of the first discharge pipe 22 is opened, and the first gear 212 drives the screw conveying shaft 21 to rotate, thereby transferring the pharmaceutical intermediate to the horizontal rotating drum 5. The horizontal rotating drum 5 rotates due to the engagement of the second gear 231 and the third gear 42 on the first conveying pipe 23 and cooperates with the electric heater for drying. During the drying process, the exhaust pipe 52 is manually opened and closed to release pressure and exhaust. After the drying is completed, the switch valve on the second discharge pipe 51 is opened to transfer the pharmaceutical intermediate to the storage box 3 for storage.

[0035] Embodiment 2: This embodiment differs from Embodiment 1 in that Figure 4 and Figure 5As shown, the exhaust assembly includes a piston rod 515 with one end slidingly sealing and blocking the air outlet 55, a first baffle 514 fixedly connected to the other end of the piston rod 515, and a second airbag rod 516 used to connect the first baffle 514 with the side wall of the arc-shaped cavity 511, the exhaust pipe 52 passes through the inner wall of the second discharge pipe 51, the first baffle 514 is used for slidingly sealing and blocking the exhaust pipe 52, and the piston rod 515 is composed of a piston blocking the air outlet 55 and a rod body connecting the piston and the first baffle 514.

[0036] The working principle of this embodiment is different from that of Embodiment 1 in that, under high temperature, as the drying time increases, the air pressure in the horizontal drum 5 gradually increases, thereby pushing open the piston rod 515 and allowing the gas to enter the exhaust area 512 from the outlet hole 55, so that the piston rod 515 drives the first baffle 514 to move left to open the exhaust pipe 52 for automatic exhaust.

[0037] Embodiment 3: This embodiment differs from Embodiment 2 in that Figure 6 and Figure 7 As shown, the side wall of the second discharge pipe 51, the side wall of the ring plate 56, and the side wall of the transverse drum 5 have a first cavity, a second cavity, and a third cavity in sequence, and the first cavity, the second cavity, and the third cavity are connected in sequence. The drying device includes a high-temperature water tank 54 connected to the first cavity through a high-temperature water inlet pipe 541 and a high-temperature water outlet pipe 542, and a low-temperature water tank 53 connected to the first cavity through a low-temperature water inlet pipe 531 and a low-temperature water outlet pipe 532. A second baffle 517 for sliding and sealing to block the low-temperature water inlet pipe 531 or the high-temperature water inlet pipe 541 and a first airbag rod 512 for connecting the second baffle 517 with the second airbag rod 516 are provided in the first cavity, and the first airbag rod 512 passes through the inner wall of the second discharge pipe 51 through the connecting pipe 513 and is connected to the second airbag rod 516; when the air pressure is too high, the second baffle 517 gradually slides and seals to block the high-temperature water inlet pipe 541 and opens the low-temperature water inlet pipe 531;

[0038] The low-temperature water outlet pipe 532 and the high-temperature water outlet pipe 542 are both provided with a control mechanism for controlling the opening or closing of water outlet, and the control mechanism includes a water level monitoring meter arranged in the high-temperature water tank 54 and the low-temperature water tank 53, a one-way switch valve arranged on the high-temperature water outlet pipe 542 and the low-temperature water outlet pipe 532, and a controller arranged on the second discharge pipe 51. The water level monitoring meter and the one-way switch valve are both electrically connected to the controller, and the water level monitoring meter, the controller and the switch valve are all commercially available equipment.

[0039] The working principle of this embodiment is different from that of Embodiment 1 in that, during the exhaust process, the first baffle 514 moves leftward to squeeze the second airbag rod 516 to stretch the first airbag rod 512 to gradually open the low-temperature water inlet pipe 531 and gradually close the high-temperature water inlet pipe 541. When the second baffle 517 does not completely close the high-temperature water inlet pipe 541, the low-temperature water dilutes the high-temperature water to gradually reduce the temperature until the high-temperature water inlet pipe 541 is completely blocked by the second baffle 517, and the high-temperature water is flushed back into the high-temperature water tank 54 from the high-temperature water outlet pipe 542. When the water level monitoring meter in the high-temperature water tank 54 detects that the water level has risen to the highest point, the one-way switch valve of the high-temperature water outlet pipe 542 is closed through the controller, thereby starting the low-temperature water circulation for low temperature.

Claims

1. A rotary drum drying device, characterized in that: The invention comprises a base (1), a water cylinder (2) and a storage box (3) arranged on the base (1), a vertical rotating cylinder (4) rotatably connected to the top of the water cylinder (2), and a transverse rotating cylinder (5) located between the water cylinder (2) and the storage box (3), wherein one end of the transverse rotating cylinder (5) is connected to the vertical rotating cylinder (4), and the other end of the transverse rotating cylinder (5) is connected to the storage box (3) through a second discharge pipe (51), and a drying device is arranged on the transverse rotating cylinder (5); the second discharge pipe (51) is fixedly connected to the storage box (3) The second discharge pipe (51) is connected to the horizontal rotating drum (5), and an exhaust pipe (52) is provided on the second discharge pipe (51). An annular plate (56) is provided at the end of the second discharge pipe (51) and is rotatably sealed with the horizontal rotating drum (5). An arc-shaped cavity (511) is provided in the second discharge pipe (51) and is connected to the exhaust pipe (52). An air outlet hole (55) is provided on the annular plate (56) and is connected to the arc-shaped cavity (511) and the horizontal rotating drum (5). An exhaust component for opening or closing the exhaust pipe (52) is provided in the arc-shaped cavity (511).

2. A rotary drum drying device according to claim 1, characterized in that: The exhaust assembly comprises a piston rod (515) with one end slidingly sealing and blocking the air outlet hole (55), a first baffle (514) fixedly connected to the other end of the piston rod (515), and a second airbag rod (516) used to connect the first baffle (514) and the side wall of the arc-shaped cavity (511); the exhaust pipe (52) passes through the inner wall of the second discharge pipe (51), and the first baffle (514) is used to slide and seal and block the exhaust pipe (52).

3. A rotary drum drying device according to claim 2, characterized in that: The side wall of the second discharge pipe (51), the side wall of the ring plate (56), and the side wall of the transverse drum (5) respectively have a first cavity, a second cavity, and a third cavity, and the first cavity, the second cavity, and the third cavity are connected in sequence. The drying device includes a high-temperature water tank (54) connected to the first cavity through a high-temperature water inlet pipe (541) and a high-temperature water outlet pipe (542), and a low-temperature water tank (53) connected to the first cavity through a low-temperature water inlet pipe (531) and a low-temperature water outlet pipe (532). A second baffle (517) for slidingly sealing and blocking a low-temperature water inlet pipe (531) or a high-temperature water inlet pipe (541) and a first airbag rod (512) for connecting the second baffle (517) and the second airbag rod (516) are provided, and the first airbag rod (512) penetrates the inner wall of the second discharge pipe (51) through a connecting pipe (513) and is connected to the second airbag rod (516); and a control mechanism for controlling the opening or closing of water discharge is provided on both the low-temperature water outlet pipe (532) and the high-temperature water outlet pipe (542).

4. A rotary drum drying device according to claim 3, characterized in that: The control mechanism comprises a water level monitor arranged in a high-temperature water tank (54) and a low-temperature water tank (53), a one-way switch valve arranged on a high-temperature water outlet pipe (542) and a low-temperature water outlet pipe (532), and a controller arranged on a second discharge pipe (51); the water level monitor and the one-way switch valve are both electrically connected to the controller.

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