Drying tower for graded recovery of fine powder

Abstract

The utility model discloses a drying tower for graded recovery of fine powder, which belongs to the technical field of particle powder manufacturing equipment and comprises a drying tower body, a collecting hopper and a dust graded recovery module. A drying output port of the drying tower body is communicated with a collecting input port of the collecting hopper, and a recycling feeding port of the dust grading recycling module extends into the collecting hopper from the side face of the collecting hopper; the dust classification recycling module comprises a centrifugal recycling mechanism and a bag-type dust collector which are connected in series, the input end of the centrifugal recycling mechanism is communicated with the recycling feeding port, the output end of the bag-type dust collector is communicated with the ball mill, and a backflow pipe is arranged on the side wall of the centrifugal recycling mechanism; and the centrifugal recovery mechanism is communicated with the collection output port of the collection hopper through the return pipe. The drying tower for fine powder grading recovery solves the problem of high cost caused by high proportion of fine dust needing to be treated again in an existing drying tower.

Description

Technical Field

[0001] The utility model relates to the technical field of granular powder manufacturing equipment, in particular to a drying tower for classifying and recovering fine powder. Background Art

[0002] Spray drying is a drying process in which a raw liquid material is atomized into droplets using a nozzle and then exposed to direct contact with the droplets using hot air or other gases to produce a powdered product. In commercial spray drying towers, when the dried powder falls into the collection hopper, fine powder forms dust. This dust is then collected directly through a bag filter. After the fine powder is recovered, it must be processed in a ball mill for reuse before re-entering the drying tower and re-processing. Existing equipment generates 3%-5% of the fine dust recovered and then processed in the ball mill. This high proportion of fine dust leads to extremely high costs. Utility Model Content

[0003] In order to overcome the defects of the prior art, the utility model provides a drying tower for fine powder classification recovery to solve the above problems.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a drying tower for fine powder classification recovery, comprising a drying tower body, a collecting hopper and a dust classification recovery module;

[0005] The drying output port of the drying tower body is connected to the collection input port of the collection hopper, and the recovery feed port of the dust classification recovery module extends from the side of the collection hopper into the collection hopper;

[0006] The dust classification recovery module includes a centrifugal recovery mechanism and a bag dust collector connected in series, wherein the input end of the centrifugal recovery mechanism is connected to the recovery feed port, the output end of the bag dust collector is connected to the ball mill, and the side wall of the centrifugal recovery mechanism is provided with a reflux pipe, and the centrifugal recovery mechanism is connected to the collection output port of the collection hopper through the reflux pipe.

[0007] Preferably, the centrifugal recovery mechanism includes a centrifugal channel and a rotary blade fan, the first end of the centrifugal channel is connected to the recovery feed port, the second end of the centrifugal channel is connected to the input end of the bag dust collector, the rotary blade fan is arranged at the first end of the centrifugal channel close to the recovery feed port, the return pipe is arranged at the second end of the centrifugal channel away from the recovery feed port, and one end of the return pipe extends from the side wall of the centrifugal channel into the centrifugal channel, and the other end of the return pipe is connected to the collection output port of the collection hopper.

[0008] Optionally, one end of the reflux pipe is funnel-shaped, and its cross-sectional area decreases continuously in a direction away from the centrifugal channel.

[0009] Specifically, the centrifugal channel is a trumpet-shaped structure, the diameter of the first end of the centrifugal channel is smaller than the diameter of the second end of the centrifugal channel, and the diameter of the input end of the bag filter is smaller than the diameter of the second end of the centrifugal channel.

[0010] It is worth noting that a recovery feed pipe is provided at the first end of the centrifugal channel, one end of the recovery feed pipe away from the centrifugal channel extends into the collecting hopper, and one end of the recovery feed pipe faces the collecting output port of the collecting hopper.

[0011] Preferably, a drying chamber is provided in the drying tower body, and a heating module is provided in the drying chamber.

[0012] The beneficial effect of the present invention is that in the drying tower for fine powder classification recovery, an extra centrifugal recovery mechanism is set in front of the input end of the bag dust collector. When the fine dust forms dust and enters the dust classification recovery module, it will first pass through the centrifugal recovery mechanism. The centrifugal recovery mechanism uses centrifugal force to drive most of the fine dust to flow to the side wall of the centrifugal recovery mechanism, and then enter the reflux pipe, and then allow this part of the fine dust to be concentrated through the reflux pipe and the powder at the collection output port of the collection hopper, and allow this part of the fine dust to return to the powder, thereby reducing the fine dust entering the bag dust collector, thereby reducing the proportion of fine dust entering the bag dust collector, and then reducing the amount of fine dust that is subsequently reprocessed, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front cross-sectional view of a drying tower for powder classification recovery in one embodiment of the present invention;

[0014] Figure 2 It is a right side cross-sectional view of a drying tower for powder classification recovery in one embodiment of the present invention;

[0015] Figure 3 A top view of a drying tower for powder classification recovery in one embodiment of the present invention;

[0016] Figure 4 This is a structural diagram of a centrifugal recovery mechanism in one embodiment of the present utility model;

[0017] In the figure: 1 drying tower body; 11 drying output port; 12 drying chamber; 13 heating module; 2 collecting hopper; 21 collecting input port; 22 collecting output port; 3 dust classification recovery module; 31 recovery feed pipe; 32 centrifugal recovery mechanism; 321 reflux pipe; 322 centrifugal channel; 323 rotary vane fan; 33 bag dust collector. DETAILED DESCRIPTION

[0018] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0019] like Figure 1-4 As shown, a drying tower for fine powder classification recovery includes a drying tower body 1, a collecting hopper 2 and a dust classification recovery module 3;

[0020] The drying output port 11 of the drying tower body 1 is connected to the collection input port 21 of the collection hopper 2, and the recovery feed port of the dust classification recovery module 3 extends from the side of the collection hopper 2 into the collection hopper 2;

[0021] The dust classification recovery module 3 includes a centrifugal recovery mechanism 32 and a bag dust collector 33 connected in series, wherein the input end of the centrifugal recovery mechanism 32 is connected to the recovery feed port, and the output end of the bag dust collector 33 is connected to the ball mill. The side wall of the centrifugal recovery mechanism 32 is provided with a return pipe 321, and the centrifugal recovery mechanism 32 is connected to the collection output port 22 of the collection hopper 2 through the return pipe 321.

[0022] In the drying tower for fine powder classification recovery, an additional centrifugal recovery mechanism 32 is set in front of the input end of the bag dust collector 33. When the fine dust forms dust and enters the dust classification recovery module 3, it will first pass through the centrifugal recovery mechanism 32. The centrifugal recovery mechanism 32 uses centrifugal force to drive most of the fine dust to flow to the side wall of the centrifugal recovery mechanism 32, and then enter the reflux pipe 321. This part of the fine dust is then concentrated through the reflux pipe 321 and the powder at the collection output port 22 of the collection hopper 2, and this part of the fine dust is returned to the powder, thereby reducing the fine dust entering the bag dust collector 33, thereby reducing the proportion of fine dust entering the bag dust collector 33, and then reducing the amount of fine dust that is subsequently reprocessed, thereby reducing costs.

[0023] It is worth noting that the centrifugal recovery mechanism 32 includes a centrifugal channel 322 and a rotary blade fan 323. The first end of the centrifugal channel 322 is connected to the recovery feed port, and the second end of the centrifugal channel 322 is connected to the input end of the bag dust collector 33. The rotary blade fan 323 is arranged at the first end of the centrifugal channel 322 close to the recovery feed port, and the return pipe 321 is arranged at the second end of the centrifugal channel 322 away from the recovery feed port, and one end of the return pipe 321 extends from the side wall of the centrifugal channel 322 into the centrifugal channel 322, and the other end of the return pipe 321 is connected to the collection output port 22 of the collecting hopper 2. The rotary blade fan 323 can accelerate the flow of fine dust and blow the fine dust to the side wall of the centrifugal channel 322, so that the fine dust flows along the side wall of the centrifugal channel 322. When the fine dust flows to one end of the return pipe 321, it can enter the return pipe 321 and be output from the other end of the return pipe 321, so that the fine dust can merge with the powder output from the collection output port 22.

[0024] Optionally, one end of the return pipe 321 is funnel-shaped, and its cross-sectional area decreases continuously in a direction away from the centrifugal channel 322. The funnel-shaped return pipe 321 is conducive to collecting fine dust located on the side wall of the centrifugal channel 322.

[0025] Preferably, the centrifugal channel 322 has a trumpet-shaped structure, wherein the diameter of the first end of the centrifugal channel 322 is smaller than the diameter of the second end of the centrifugal channel 322, and the diameter of the input end of the bag-type dust collector 33 is smaller than the diameter of the second end of the centrifugal channel 322. This allows the vast majority of fine dust flowing along the sidewalls of the centrifugal channel 322 to enter the return pipe 321 rather than the bag-type dust collector 33. Even if the fine dust flows along the sidewalls of the centrifugal channel 322 to the second end of the centrifugal channel 322, it will not directly enter the bag-type dust collector 33. Instead, it will collide with the inner wall of the second end of the centrifugal channel 322 and then fall into the return pipe 321, thereby further increasing the amount of fine dust entering the return pipe 321.

[0026] Specifically, a recovery feed pipe 31 is provided at the first end of the centrifugal channel 322. The end of the recovery feed pipe 31, which is away from the centrifugal channel 322, extends into the collection hopper 2, and one end of the recovery feed pipe 31 faces the collection outlet 22 of the collection hopper 2. In this way, when dust is raised, the recovery feed pipe 31 facing the collection outlet 22 of the collection hopper 2 can more easily collect the dust.

[0027] It is worth noting that the drying tower body 1 is provided with a drying chamber 12, which is equipped with a heating module 13. The heating module 13 can be a heating wire. By providing the heating module 13, the powder can be dried and fall into the collection hopper 2 after drying. The drying tower body 1 is positioned above the collection hopper 2, with the drying outlet 11 located at the top of the drying tower body 1 and the collection outlet 22 located at the bottom of the collection hopper 2, thereby utilizing gravity to collect the powder.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A drying tower for fine powder classification recovery, characterized in that: It includes a drying tower, a collection hopper and a dust classification and recovery module; The drying output port of the drying tower body is connected to the collection input port of the collection hopper, and the recovery feed port of the dust classification recovery module extends from the side of the collection hopper into the collection hopper; The dust classification recovery module includes a centrifugal recovery mechanism and a bag dust collector connected in series, wherein the input end of the centrifugal recovery mechanism is connected to the recovery feed port, the output end of the bag dust collector is connected to the ball mill, and the side wall of the centrifugal recovery mechanism is provided with a reflux pipe, and the centrifugal recovery mechanism is connected to the collection output port of the collection hopper through the reflux pipe.

2. A drying tower for fine powder classification recovery according to claim 1, characterized in that: The centrifugal recovery mechanism includes a centrifugal channel and a rotary blade fan, the first end of the centrifugal channel is connected to the recovery feed port, the second end of the centrifugal channel is connected to the input end of the bag dust collector, the rotary blade fan is arranged at the first end of the centrifugal channel close to the recovery feed port, the return pipe is arranged at the second end of the centrifugal channel away from the recovery feed port, and one end of the return pipe extends from the side wall of the centrifugal channel into the centrifugal channel, and the other end of the return pipe is connected to the collection output port of the collection hopper.

3. A drying tower for fine powder classification recovery according to claim 2, characterized in that: One end of the reflux pipe is in a funnel shape, and its cross-sectional area decreases continuously in a direction away from the centrifugal channel.

4. A drying tower for fine powder classification recovery according to claim 2, characterized in that: The centrifugal channel is a trumpet-shaped structure, the diameter of the first end of the centrifugal channel is smaller than the diameter of the second end of the centrifugal channel, and the diameter of the input end of the bag filter is smaller than the diameter of the second end of the centrifugal channel.

5. A drying tower for fine powder classification recovery according to claim 2, characterized in that: A recovery feed pipe is provided at the first end of the centrifugal channel, one end of the recovery feed pipe away from the centrifugal channel extends into the collecting hopper, and one end of the recovery feed pipe faces the collecting output port of the collecting hopper.

6. A drying tower for fine powder classification recovery according to claim 1, characterized in that: A drying chamber is provided in the drying tower body, and a heating module is provided in the drying chamber.

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