Vacuum spray drying device for veterinary drug preparation

Abstract

The vacuum spray drying device comprises a drying tower, an air inlet box is arranged at the top of the drying tower, a collecting hopper is arranged at the bottom of the drying tower, and the air inlet box and the collecting hopper are both communicated with an inner cavity of the drying tower. A spray pipe is installed in the air inlet box, the middle of the spray pipe is fixedly connected with a horizontally-arranged communicating pipe, the two ends of the spray pipe are each provided with an atomization spray head, the communicating pipe is rotationally connected with the side wall of the air inlet box through a bearing seat, and the outer end of the communicating pipe is connected with the top end of a feed liquid lifting pipe through a rotary joint; an annular waste gas channel is arranged between the outer wall of the bottom end of the drying tower and the inner wall of the top end of the collecting hopper, and at least two spoilers of an annular structure are installed in the waste gas channel. According to the vacuum spray drying device provided by the utility model, the atomization nozzles can be switched, so that one atomization nozzle is used and the other atomization nozzle is standby, and the problem that the whole machine is shut down due to blockage of the atomization nozzles is solved; the dust concentration of waste gas can be reduced, and the energy consumption cost of the separator is reduced.

Description

Technical Field

[0001] The utility model relates to a vacuum spray drying device for preparing veterinary drugs, belonging to the technical field of spray drying. Background Art

[0002] Spray drying is a method of applying systematic technology to material drying. This method can directly dry solutions and emulsions into powder or granular products, eliminating the evaporation, crushing and other processes. The working principle of spray drying is that the air is filtered and heated, and enters the air distributor at the top of the dryer, and the hot air enters the drying chamber evenly in a spiral shape. The material liquid passes through the high-speed centrifugal atomizer at the top of the tower body, (rotates) sprayed into extremely fine mist liquid beads, and can be dried into finished products in a very short time by co-current contact with hot air. The finished products are continuously output from the bottom of the drying tower and the cyclone separator, and the exhaust gas is discharged by the induced draft fan.

[0003] Patent No. CN201721256770.8 discloses a vacuum spray drying unit, including a drying tower, a feed pipe, a feed pump, a heater and a vacuum pump. The drying tower has a closed drying chamber, one end of the feed pipe is used to communicate with a liquid tank containing liquid, the other end of the feed pipe is connected to the drying chamber and is installed with an atomizing nozzle for atomizing the liquid, a first discharge valve is provided at the bottom of the drying tower, the feed pump is provided on the feed pipe and is used to transport the liquid in the liquid tank to the drying chamber through the feed pipe, the heater is provided on the outside of the feed pipe and is used to conduct heat to the liquid inside the feed pipe, and the vacuum pump is connected to the drying chamber and is used to evacuate the drying chamber.

[0004] The vacuum spray drying unit disclosed in the above patent has the following technical problems during specific use:

[0005] 1. There is an atomizing nozzle on the top of the unit. Once the atomizing nozzle is blocked, the whole unit must be shut down for processing;

[0006] 2. The waste gas enters the separation mechanism directly through the pipeline without being treated. The waste gas entering the separation mechanism has a high dust concentration, resulting in high energy consumption costs for the separation mechanism.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] In view of the deficiencies in the background technology, the utility model provides a vacuum spray drying device for veterinary drug preparation, which can realize the switching of atomizing nozzles so that one atomizing nozzle can be used and the other can be kept in reserve, thereby solving the problem of whole machine shutdown due to blockage of the atomizing nozzle; the dust concentration in the exhaust gas can be reduced, and the energy consumption cost of the separator can be reduced.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] A vacuum spray drying device for preparing veterinary drugs comprises a drying tower, an air inlet box is arranged at the top of the drying tower, a collecting hopper is arranged at the bottom of the drying tower, and both the air inlet box and the collecting hopper are connected to the inner cavity of the drying tower;

[0011] A nozzle is installed inside the air intake box, the middle of the nozzle is fixedly connected to a horizontally arranged connecting pipe, and an atomizing nozzle is installed at each end of the nozzle; the connecting pipe is rotatably connected to the side wall of the air intake box through a bearing seat, and the outer end of the connecting pipe is connected to the top of the liquid lifting pipe through a rotating joint;

[0012] An annular exhaust gas passage is provided between the bottom outer wall of the drying tower and the top inner wall of the collecting hopper, and at least two annular spoilers are installed inside the exhaust gas passage.

[0013] Furthermore, the outside of the air intake box is connected with a hot air inlet pipe, and the hot air inlet pipe is arranged along the tangent direction of the air intake box.

[0014] Furthermore, a solenoid valve is installed near both ends of the nozzle, and the solenoid valve is used to control the flow of the feed liquid to the atomizing nozzle.

[0015] Furthermore, the bearing seat is fixedly connected to the outer wall of the air intake box.

[0016] Furthermore, a transmission wheel is installed on the connecting pipe, and the transmission wheel is transmission-connected to the stepping motor.

[0017] Furthermore, a discharge port is provided at the bottom end of the collecting hopper.

[0018] Furthermore, an annular air collecting pipe is provided above the exhaust gas channel, and the annular air collecting pipe is connected to the exhaust gas channel through a plurality of connecting pipes distributed in a circumference.

[0019] Furthermore, the side of the annular gas collecting pipe is connected to an exhaust gas outlet pipe which is in communication with its inner cavity, and the outer end of the exhaust gas outlet pipe is connected to a vacuum pump.

[0020] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0021] The utility model installs atomizing nozzles at both ends of the nozzle, and the stepping motor can drive the connecting pipe and the nozzle to rotate 180 degrees in sequence through the transmission wheel, so as to realize the switching of the atomizing nozzles, so that the atomizing nozzles can be used one and kept in reserve one, thereby solving the problem of the whole machine stopping due to the blockage of the atomizing nozzles.

[0022] The utility model provides an annular exhaust gas channel, and at least two annular spoilers are installed inside the exhaust gas channel. A maze channel is formed between the spoilers, which can settle larger dust particles in the airflow, reduce the dust concentration in the exhaust gas, and further reduce the energy consumption cost of the cyclone separator.

[0023] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the top structure of the utility model;

[0027] Figure 4 It is a schematic diagram of the bottom structure of the utility model.

[0028] In the figure, 1-drying tower, 2-air inlet box, 3-hot air inlet pipe, 4-nozzle, 5-atomizing nozzle, 6-solenoid valve, 7-connecting pipe, 8-bearing seat, 9-transmission wheel, 10-rotating joint, 11-liquid lifting pipe, 12-collecting hopper, 13-discharge port, 14-exhaust channel, 15-spoiler, 16-annular air collecting pipe, 17-exhaust outlet pipe. DETAILED DESCRIPTION

[0029] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0030] like Figure 1-Figure 4 As shown together, the utility model provides a vacuum spray drying device for veterinary drug preparation, including a drying tower 1, an air inlet box 2 is provided on the top of the drying tower 1, and a collecting hopper 12 is provided at the bottom of the drying tower 1, and both the air inlet box 2 and the collecting hopper 12 are connected to the inner cavity of the drying tower 1.

[0031] The outside of the air inlet box 2 is connected with a hot air inlet pipe 3 , which is arranged along the tangent direction of the air inlet box 2 . The hot air spirally enters the drying tower 1 after passing through the air inlet box 2 .

[0032] A nozzle 4 is installed inside the air inlet box 2. The middle of the nozzle 4 is fixedly connected to a horizontally arranged connecting pipe 7, and the inner cavities are connected. An atomizing nozzle 5 is installed at each end of the nozzle 4.

[0033] The nozzle 4 is provided with a solenoid valve 6 near both ends thereof, and the solenoid valve 6 is used to control the flow of the feed liquid to the atomizing nozzle 5 .

[0034] The connecting pipe 7 is rotatably connected to the side wall of the air intake box 2 through a bearing seat 8, and the bearing seat 8 is fixed to the outer wall of the air intake box 2.

[0035] The connecting pipe 7 is provided with a transmission wheel 9, which is connected to the stepping motor. The stepping motor can drive the connecting pipe 7 and the nozzle 4 to rotate 180 degrees in sequence through the transmission wheel 9, so as to switch the atomizing nozzle 5 so that the atomizing nozzle 5 can be used in one state and kept in standby state in the other state.

[0036] The outer end of the connecting pipe 7 is connected to the top of the liquid lifting pipe 11 through a rotating joint 10. The rotating joint 10 is provided so that the rotation of the connecting pipe 7 does not affect the normal lifting of the liquid.

[0037] A discharge port 13 is provided at the bottom end of the collecting hopper 12 .

[0038] An annular exhaust gas channel 14 is provided between the bottom outer wall of the drying tower 1 and the top inner wall of the collecting hopper 12. At least two annular spoilers 15 are installed inside the exhaust gas channel 14. A maze channel is formed between the spoilers 15 to settle larger dust particles in the airflow to reduce the dust concentration in the exhaust gas.

[0039] An annular air collecting pipe 16 is disposed above the exhaust gas channel 14 , and the annular air collecting pipe 16 is connected to the exhaust gas channel 14 via a plurality of connecting pipes distributed in a circumference.

[0040] The side of the annular gas collecting pipe 16 is connected with an exhaust gas outlet pipe 17 which is in communication with its inner cavity. The outer end of the exhaust gas outlet pipe 17 is connected to a vacuum pump, and the vacuum pump draws the dust-containing gas into the cyclone separator.

[0041] The specific working principle of this utility model:

[0042] The liquid feed enters the atomizing nozzle 5 in turn through the liquid feed lifting pipe 11, the connecting pipe 7, the nozzle 4, and the atomizing nozzle 5 atomizes the liquid feed and sprays it out of the drying tower 1. At the same time, hot air is blown into the drying tower 1 through the air inlet box 2 to dry the atomized liquid feed. The dried material is discharged from the bottom of the collecting hopper 12, and the air flow containing the material enters the exhaust gas channel 14, the annular collecting pipe 16 and the exhaust gas outlet pipe 17 in turn, and finally enters the cyclone separator to recover the material.

[0043] The utility model installs atomizing nozzles 5 at both ends of the nozzle 4, and the stepping motor can drive the connecting pipe 7 and the nozzle 4 to rotate 180 degrees in sequence through the transmission wheel 9, so as to realize the switching of the atomizing nozzle 5, so that the atomizing nozzle 5 can be used in one and kept in reserve in another, thereby preventing the atomizing nozzle 5 from being blocked and causing the whole machine to stop.

[0044] The utility model provides an annular exhaust gas channel 14, and at least two annular spoilers 15 are installed inside the exhaust gas channel 14. A maze channel is formed between the spoilers 15, which can settle larger dust particles in the airflow, reduce the dust concentration in the exhaust gas, and further reduce the energy consumption cost of the cyclone separator.

[0045] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A vacuum spray drying device for veterinary drug preparation, characterized in that: It comprises a drying tower (1), wherein an air inlet box (2) is provided at the top of the drying tower (1), and a collecting hopper (12) is provided at the bottom of the drying tower (1), and both the air inlet box (2) and the collecting hopper (12) are in communication with the inner cavity of the drying tower (1); A nozzle (4) is installed inside the air intake box (2), the middle of the nozzle (4) is fixedly connected to a horizontally arranged connecting pipe (7), and an atomizing nozzle (5) is installed at each end of the nozzle (4); the connecting pipe (7) is rotatably connected to the side wall of the air intake box (2) through a bearing seat (8), and the outer end of the connecting pipe (7) is connected to the top end of the liquid lifting pipe (11) through a rotating joint (10); An annular exhaust gas passage (14) is provided between the bottom outer wall of the drying tower (1) and the top inner wall of the collecting hopper (12), and at least two annular spoilers (15) are installed inside the exhaust gas passage (14).

2. The vacuum spray drying device for preparing veterinary drugs according to claim 1, characterized in that: The air intake box (2) is externally connected to a hot air intake pipe (3), and the hot air intake pipe (3) is arranged along a tangent direction of the air intake box (2).

3. The vacuum spray drying device for preparing veterinary drugs according to claim 1, characterized in that: A solenoid valve (6) is installed near both ends of the nozzle (4), and the solenoid valve (6) is used to control the flow of liquid to the atomizing nozzle (5).

4. The vacuum spray drying device for preparing veterinary drugs according to claim 1, characterized in that: The bearing seat (8) is fixedly connected to the outer wall of the air intake box (2).

5. The vacuum spray drying device for preparing veterinary drugs according to claim 1, characterized in that: A transmission wheel (9) is mounted on the connecting pipe (7), and the transmission wheel (9) is in transmission connection with the stepping motor.

6. The vacuum spray drying device for preparing veterinary drugs according to claim 1, characterized in that: The bottom end of the collecting hopper (12) is provided with a discharge port (13).

7. The vacuum spray drying device for preparing veterinary drugs according to claim 1, characterized in that: An annular air collecting pipe (16) is provided above the exhaust gas channel (14), and the annular air collecting pipe (16) and the exhaust gas channel (14) are connected via a plurality of circumferentially distributed connecting pipes.

8. The vacuum spray drying device for preparing veterinary drugs according to claim 7, characterized in that: The side of the annular gas collecting pipe (16) is connected to an exhaust gas outlet pipe (17) which is in communication with its inner cavity, and the outer end of the exhaust gas outlet pipe (17) is connected to a vacuum pump.

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