Boiling granulating device capable of continuously granulating
By adding particle crushing units and improving the structure of dust removal and backblowing units in the boiling granulator, the problems of discontinuous production and uneven particle size in the prior art are solved, and efficient and continuous granulation process and uniform particle size are achieved.
Patent Information
- Application Number
- CN202422233997.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing boiling granulators have shortcomings in dust removal and pellet discharge structures, resulting in high equipment costs, discontinuous production and uneven particle size.
On the basis of the original granulation fluidized bed, dust removal, backblowing and other units, the particle crushing unit is added, and the structure of the dust removal and backblowing units is improved. Two left and right dust removal chambers and backblowing dryers are used to achieve continuous production and particle size uniformity.
The continuous production of boiling granulation is achieved, the granulation efficiency and uniformity of finished particles are improved, and the equipment cost and operation complexity are reduced.
Smart Images
Figure CN223010473U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of particle preparation and relates to a fluidized granulation device for continuous granulation. Background Art
[0002] Solid preparations, as commonly used raw materials or products in industrial production processes, are widely used in the fields of medicine, food, test materials, pigments, chemical engineering, etc. Granules are an important type of solid preparation. Currently, the commonly used granulation methods include wet granulation, dry granulation, and fluidized granulation. Among them, fluidized granulation is a technology in which materials are put into a closed container at one time, evenly mixed, and then the binder is evenly sprayed into the container through equipment, so that the binder and the materials are fully mixed, flow in the container to form small particles, and hot air is sent in from the bottom to dry the wet particles, and finally the finished dry particles are directly collected. Based on the operation of fluidized granulation, it can be used for the preparation of materials that are expensive and have poor thermal stability.
[0003] The commonly used equipment for fluidized granulation is a fluidized granulator. To avoid material loss, a filtering device is generally provided in the filtering chamber of the traditional fluidized granulator. The traditional structure is to use a vibrating bag cylinder to vibrate the dust removal cloth bag, so that the dust or materials attached to the surface of the dust removal cloth bag are shaken off by the up and down movement of the cylinder. Moreover, when using cloth bag dust removal, the cloth bag is prone to material adhesion and has a short service life, and needs to be disassembled and cleaned. The existing fluidized granulators usually need to disassemble the dust removal bag for cleaning, and cannot achieve automatic on-line cleaning. At the same time, the feeding and discharging structures of the existing fluidized granulators are not reasonable enough, inconvenient to use, and cannot achieve the effect of continuous production.
[0004] CN 205815629U discloses a fluidized granulation dryer, which includes a granulation cylinder body and a fluidized bed. The granulation cylinder body is arranged on the fluidized bed. A stainless steel wire mesh filter plate that divides the inner cavity of the granulation cylinder body into a granulation cavity and an air outlet cavity is arranged in the granulation cylinder body. An air outlet pipe connected to the air outlet cavity is arranged on one side of the granulation cylinder body. An anti-blowing air hood is arranged in the air outlet cavity, and an anti-blowing fan is arranged in the anti-blowing air hood. A binder ejector is arranged on the fluidized bed, an air inlet pipe is arranged at the bottom of the fluidized bed, a feeder is arranged on the granulation cylinder body, a centrifugal discharging component is arranged on the fluidized bed, and the fluidized bed is slidably arranged at the bottom of the granulation cylinder body. Sliding the fluidized bed can make it dock with the granulation cylinder body. The dust removal unit in this fluidized granulation dryer only discloses that it is composed of a wire mesh filter plate. This structural design makes it impossible to granulate during the anti-blowing of the dust removal unit, that is, the granulation process cannot be continuous. At the same time, the discharging structure of the granular material is relatively complex, resulting in a high equipment cost, and it does not involve the control of the granulation particle size.
[0005] CN 205965757U discloses a fluidized bed granulator and its pulse dust removal mechanism, including a plurality of dust removal systems evenly distributed circumferentially above the fluidized bed granulator. The dust removal system includes a filter cartridge, a reverse blowing cylinder, a valve, a pulse solenoid valve, and a reverse blowing air pipe. The filter cartridge is located inside the top cylinder body of the fluidized bed granulator. The reverse blowing cylinder is arranged above the top cylinder body. The valve is arranged on the filter cartridge and connected to the piston rod of the reverse blowing cylinder. The expansion and contraction of the reverse blowing cylinder realizes the opening and closing of the valve. The reverse blowing air pipe is communicated with the filter cartridge. The pulse solenoid valve is arranged on the reverse blowing air pipe. It also includes a controller for controlling the actions of the reverse blowing cylinder and the pulse solenoid valve. This fluidized bed granulator focuses on introducing the structure of the dust removal system, which can blow the filter cartridge reversely to avoid the need for frequent disassembly and replacement of the filter cartridge. However, the structure of the dust removal system is relatively complex and does not involve the discharge structure of the granulated material after granulation.
[0006] In summary, for the structural selection of the fluidized bed granulator, it is necessary to improve the structure according to the requirements of fluidized bed granulation, so that the dust removal unit can be cleaned without disassembly, ensuring the continuous production of granulated materials, improving the granulation efficiency, and ensuring the uniformity of granulated materials. Summary of the Utility Model
[0007] Aiming at the problems existing in the prior art, the purpose of the present utility model is to provide a fluidized bed granulation device for continuous granulation. The fluidized bed granulation device adds a particle crushing unit on the basis of the original granulation fluidized bed, dust removal, reverse blowing and other units, and improves the structures of the dust removal and reverse blowing units, so that fluidized bed granulation can be continuously produced, the dust removal unit can be cleaned without disassembly, which helps to improve the granulation efficiency and ensure the uniformity of the finished particles.
[0008] To achieve this purpose, the present utility model adopts the following technical solutions:
[0009] The present utility model provides a fluidized bed granulation device for continuous granulation. The fluidized bed granulation device includes a granulation fluidized bed unit, a air supply unit, a dust removal unit, a particle crushing unit, and a reverse blowing unit; the granulation fluidized bed unit includes a fluidized bed and a granulation chamber, the granulation chamber is directly communicated with the fluidized bed and is located above the fluidized bed; the dust removal unit includes two dust removal chambers arranged side by side on the left and right, which are located above the granulation fluidized bed unit; the air supply unit includes a blower and an induced draft fan, the outlet of the blower is connected to the granulation fluidized bed unit, and the inlet of the induced draft fan is connected to the gas phase outlet of the dust removal unit;
[0010] The particle crushing unit includes a crushing chamber, which is located below the granulation fluidized bed unit and is separated from the granulation fluidized bed unit by a movable baffle; the reverse blowing unit includes two parts of structures. One is a reverse blowing pipe located on the upper side inside the dust removal chamber, and the other is a reverse blowing blower located on the upper part outside the dust removal unit and connected to the dust removal unit.
[0011] In the present utility model, solid particles are produced by the method of fluidized granulation. According to the basic structure of the fluidized granulation device, the powder raw materials are in a circular fluidized state in the fluidized bed, are preheated and mixed by the heated air, the binder solution is atomized and sprayed in, so that several particles are aggregated into agglomerates containing the binder. Due to the continuous drying of the material by the hot air, the moisture in the agglomerates evaporates and the binder solidifies. This process is continuously repeated to form ideal and uniform multi-porous spherical particles; the dust removal unit effectively intercepts the dust blown upward during the granulation process, and through the design of the back-blowing pipe, the aggregation of materials at the top is reduced. The setting of the two dust removal chambers can work alternately to ensure the continuous production of particles; the setting of the back-blowing fan in the back-blowing unit can blow the coarse particles after granulation into the crushing unit. Through the structural setting of the particle crushing unit, particles that meet the requirements and have uniform particle sizes are obtained. During the particle crushing process, the next round of granulation process is carried out simultaneously, which helps to improve the granulation efficiency; the device has a reasonable structural design, is easy to operate, has a low cost, high safety, and a wide range of applications.
[0012] The following are the preferred technical solutions of the present utility model, but do not limit the technical solutions provided by the present utility model. Through the following technical solutions, the technical purposes and beneficial effects of the present utility model can be better achieved and realized.
[0013] As a preferred technical solution of the present utility model, a fluidized bed screen is provided at the bottom of the fluidized bed in the granulation fluidized bed unit, and a feed inlet is provided on the side wall of the granulation chamber.
[0014] In the present utility model, the fluidized bed screen is divided into two states: open and closed. During the fluidized granulation process, the fluidized bed screen is in a horizontal closed state, and when back-blowing is carried out after granulation is completed, the fluidized bed screen opens to connect the fluidized bed with the lower transfer chamber and crushing chamber; there is an interface between the feed inlet and the granulation chamber, and the interface is closed at all other times except during feeding.
[0015] As a preferred technical solution of the present utility model, an atomizer is provided in the granulation chamber for spraying the binder solution, and the number of nozzles of the atomizer is at least one, such as one, two, three or four, etc.
[0016] In the present utility model, when there are two or more interfaces and nozzles of the atomizer in the granulation chamber, the atomization effect of the liquid medicine binder with different densities can be better guaranteed.
[0017] As a preferred technical solution of the present utility model, an air filter is provided in front of the inlet of the blower in the air supply unit.
[0018] In the present utility model, the gas sent by the air blower is heated air, which can preheat the device by introducing hot air before the material is loaded. After the temperature stabilizes, the powder material is loaded from the feed port, and then granulation can be directly carried out. The temperature of the air used can be selected from 20 to 120 °C according to the granulation requirements, such as 20 °C, 30 °C, 40 °C, 50 °C, 60 °C, 80 °C, 100 °C or 120 °C, etc., but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.
[0019] As a preferred technical solution of the present utility model, the particle crushing unit further includes a crusher and a crushing screen. The crusher is arranged in the crushing chamber, and the crushing screen is located below the crushing chamber; the aperture of the crushing screen is 0.18 to 2.0 mm, such as 0.18 mm, 0.25 mm, 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.8 mm or 2.0 mm, etc., but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.
[0020] As a preferred technical solution of the present utility model, a transfer chamber is further provided between the granulation fluidized bed unit and the particle crushing unit. The outlet of the air blower is connected to the transfer chamber, and a screen is provided at the interface between the air blower and the transfer chamber.
[0021] The transfer chamber and the fluidized bed are separated by a fluidized bed screen, and the transfer chamber and the crushing chamber are separated by a movable baffle.
[0022] In the present utility model, a screen is provided at the interface between the air blower and the transfer chamber, which can prevent the formed coarse particles from being blown back into the air blower when the backwashing unit works; the baffle between the crushing chamber and the transfer chamber is in a closed state during the fluidized granulation process, and is opened during the backwashing after granulation is completed, so that the transfer chamber is communicated with the crushing chamber.
[0023] As a preferred technical solution of the present utility model, the dust removal unit includes a left dust removal chamber and a right dust removal chamber, and a dust removal screen is provided in the dust removal chamber.
[0024] The dust removal screen includes a stainless steel screen or a gauze screen, and its aperture is 0.06 to 0.12 mm, such as 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm or 0.12 mm, etc., but is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.
[0025] A baffle is provided between the dust removal chamber and the granulation chamber, and the baffle is located below the left dust removal chamber or the right dust removal chamber.
[0026] As a preferred technical solution of the present utility model, the backflush pipe inside the dust removal unit is a dust removal screen backflush pipe, and the backflush pipes above the left dust removal chamber and the right dust removal chamber are independently arranged.
[0027] In the present utility model, the baffle between the dust removal chamber and the granulation chamber can move under the left dust removal chamber or the right dust removal chamber. When the left dust removal chamber is working, the left dust removal chamber is connected to the granulation chamber, and the right dust removal chamber is separated from the granulation chamber by the baffle. The dust removal screen backflush pipe above the right dust removal chamber works to backflush the dust on the dust removal screen in the right dust removal chamber onto the baffle. After the right dust removal chamber starts to work, it is connected to the granulation chamber, and the dust falls back into the granulation chamber. At this time, backflush is carried out in the left dust removal chamber.
[0028] In the present utility model, when the dust removal screen has been used for too long and the dust cannot be fully blown off by the backflush pipe, the dust removal screen needs to be replaced. The relaxation and tightening of the granulation chamber can be controlled by the system to facilitate the replacement.
[0029] As a preferred technical solution of the present utility model, an exhaust gas chamber is further provided above the dust removal unit, and the induced draft fan of the air supply unit and the backflush blower of the backflush unit are both connected to the exhaust gas chamber.
[0030] As a preferred technical solution of the present utility model, the induced draft fan and the backflush blower are located on opposite sides outside the exhaust gas chamber. The outlet of the exhaust gas chamber is connected to the inlet of the induced draft fan, and the inlet of the exhaust gas chamber is connected to the outlet of the backflush blower.
[0031] In the present utility model, when all the liquid medicine adhesives have been sprayed, the air supply fan and the induced draft fan stop working. The pulverizing chamber, the transfer chamber, and the fluidized bed are connected, and the backflush blower starts to work to send all the coarse particles into the pulverizing chamber. After all the materials enter the pulverizing chamber, the fluidized bed screen and the movable partition are closed, and the backflush blower stops working. The pulverizer starts to pulverize, and the particles meeting the final specifications are obtained through the screening of the pulverizing screen. While pulverizing, new materials are put into the granulation chamber through the feed inlet, and the air supply fan and the induced draft fan are turned on to carry out a new round of granulation.
[0032] Compared with the prior art, the present utility model has the following beneficial effects:
[0033] (1) The fluidized bed granulation device of the present utility model adds a particle pulverizing unit on the basis of the original granulation fluidized bed, dust removal, backflush and other units, and improves the structures of the dust removal and backflush units, so that fluidized bed granulation can be continuously produced;
[0034] (2) In the present utility model, the dust blown upward during the granulation process is effectively intercepted by the dust removal unit, and the design of the backflush pipe reduces the accumulation of materials at the top. The setting of the two dust removal chambers can work alternately to ensure the continuous production of particles;
[0035] (3) The arrangement of the reverse blower in the reverse blowing unit of the present utility model can blow the coarsened particles after granulation into the pulverizing unit. Through the structural arrangement of the particle pulverizing unit, particles that meet the requirements and have uniform particle sizes are obtained. During the particle pulverizing process, the next round of granulation process is carried out simultaneously, which helps to improve the granulation efficiency;
[0036] (4) The device of the present utility model has a reasonable structural design, is easy to operate, has a low cost, high safety, and a wide range of applications. Description of the Drawings
[0037] Figure 1 is a schematic structural diagram of a fluidized bed granulation device for continuous granulation provided in Embodiment 1 of the present utility model;
[0038] Among them, 1 - air filter, 2 - blower, 3 - pulverizing chamber, 4 - pulverizing screen, 5 - pulverizer, 6 - transfer chamber, 7 - fluidized bed screen, 8 - fluidized bed, 9 - granulation chamber, 10 - atomizer, 11 - right dust removal chamber, 12 - left dust removal chamber, 13 - dust removal screen, 14 - reverse blowing pipe, 15 - waste gas chamber, 16 - induced draft fan, 17 - reverse blower, 18 - feed inlet. Detailed Embodiments
[0039] To better illustrate the present utility model and facilitate understanding of its technical solutions, the present utility model is further described in detail below. However, the following embodiments are only simple examples of the present utility model and do not represent or limit the scope of the claimed protection of the present utility model. The scope of protection of the present utility model is subject to the claims.
[0040] The following are typical but non - restrictive embodiments of the present utility model:
[0041] Embodiment 1:
[0042] This embodiment provides a fluidized bed granulation device for continuous granulation. The schematic structural diagram of the fluidized bed granulation device is as Figure 1 shown, and it includes a granulation fluidized bed unit, a air supply unit, a dust removal unit, a particle pulverizing unit, and a reverse blowing unit; the granulation fluidized bed unit includes a fluidized bed 8 and a granulation chamber 9. The granulation chamber 9 is directly connected to the fluidized bed 8 and is located above the fluidized bed 8; the dust removal unit includes two dust removal chambers, the left and the right, arranged in parallel, and is located above the granulation fluidized bed unit; the air supply unit includes a blower 2 and an induced draft fan 16. The outlet of the blower 2 is connected to the granulation fluidized bed unit, and the inlet of the induced draft fan 16 is connected to the gas phase outlet of the dust removal unit;
[0043] The particle crushing unit includes a crushing chamber 3, which is located below the granulation fluidized bed unit and is separated from the granulation fluidized bed unit by a movable baffle; the backwashing unit includes two parts of structures. One is a backwashing pipe 14 located on the upper side inside the dust removal chamber, and the other is a backwashing blower 17 located on the upper part outside the dust removal unit and connected to the dust removal unit.
[0044] In the granulation fluidized bed unit, a fluidized bed screen 7 is provided at the bottom of the fluidized bed 8, and a feed inlet 18 is provided on the side wall of the granulation chamber 9. The raw material powder is maltodextrin.
[0045] An atomizer 10 is provided in the granulation chamber 9 for spraying an adhesive solution, and the number of nozzles of the atomizer 10 is two.
[0046] An air filter screen 1 is provided in front of the inlet of the blower 2 in the air supply unit.
[0047] The particle crushing unit further includes a crusher 5 and a crushing screen 4. The crusher 5 is arranged in the crushing chamber 3, and the crushing screen 4 is located below the crushing chamber 3; the aperture of the crushing screen 4 is 0.8 mm.
[0048] A transfer chamber 6 is further provided between the granulation fluidized bed unit and the particle crushing unit. The outlet of the blower 2 is connected to the transfer chamber 6, and a screen is provided at the interface between the blower 2 and the transfer chamber 6.
[0049] The transfer chamber 6 and the fluidized bed 8 are separated by the fluidized bed screen 7, and the transfer chamber 6 and the crushing chamber 3 are separated by a movable baffle.
[0050] The dust removal unit includes a left dust removal chamber 12 and a right dust removal chamber 11, and a dust removal screen 13 is provided in the dust removal chamber.
[0051] The dust removal screen 13 is a stainless steel screen, and its aperture is 0.09 mm.
[0052] A baffle is provided between the dust removal chamber and the granulation chamber 9, and the baffle is located below the left dust removal chamber or the right dust removal chamber.
[0053] The backwashing pipe 14 inside the dust removal unit is a dust removal screen backwashing pipe, and the backwashing pipes 14 above the left dust removal chamber 12 and the right dust removal chamber 11 are independently arranged.
[0054] An exhaust gas chamber 15 is further provided above the dust removal unit. The induced draft fan 16 of the air supply unit and the backwashing blower 17 of the backwashing unit are both connected to the exhaust gas chamber 15.
[0055] The induced draft fan 16 and the backwashing blower 17 are located on opposite sides outside the exhaust gas chamber 15. The outlet of the exhaust gas chamber 15 is connected to the inlet of the induced draft fan 16, and the inlet of the exhaust gas chamber 15 is connected to the outlet of the backwashing blower 17.
[0056] Example 2:
[0057] This embodiment provides a fluidized bed granulation device for continuous granulation. The fluidized bed granulation device includes a granulation fluidized bed unit, a air supply unit, a dust removal unit, a particle crushing unit and a back-blowing unit; the granulation fluidized bed unit includes a fluidized bed 8 and a granulation chamber 9, the granulation chamber 9 is directly communicated with the fluidized bed 8 and is located above the fluidized bed 8; the dust removal unit includes two left and right dust removal chambers arranged in parallel and is located above the granulation fluidized bed unit; the air supply unit includes a blower 2 and an induced draft fan 16, the outlet of the blower 2 is connected to the granulation fluidized bed unit, and the inlet of the induced draft fan 16 is connected to the gas phase outlet of the dust removal unit;
[0058] The particle crushing unit includes a crushing chamber 3, which is located below the granulation fluidized bed unit and is separated from the granulation fluidized bed unit by a movable baffle; the back-blowing unit includes two parts of structures. One is a back-blowing pipe 14 located on the upper side inside the dust removal chamber, and the other is a back-blowing blower 17 located on the upper part outside the dust removal unit and connected to the dust removal unit.
[0059] A fluidized bed screen 7 is provided at the bottom of the fluidized bed 8 in the granulation fluidized bed unit, and a feed inlet 18 is provided on the side wall of the granulation chamber 9. The raw material powder is dextrin.
[0060] An atomizer 10 is provided in the granulation chamber 9 for spraying an adhesive solution, and the number of nozzles of the atomizer 10 is three.
[0061] An air filter 1 is provided in front of the inlet of the blower 2 in the air supply unit.
[0062] The particle crushing unit further includes a crusher 5 and a crushing screen 4. The crusher 5 is arranged in the crushing chamber 3, and the crushing screen 4 is located below the crushing chamber 3; the aperture of the crushing screen 4 is 0.25 mm.
[0063] A transfer chamber 6 is further provided between the granulation fluidized bed unit and the particle crushing unit. The outlet of the blower 2 is connected to the transfer chamber 6, and a screen is provided at the interface between the blower 2 and the transfer chamber 6.
[0064] The transfer chamber 6 and the fluidized bed 8 are separated by a fluidized bed screen 7, and the transfer chamber 6 and the crushing chamber 3 are separated by a movable baffle.
[0065] The dust removal unit includes a left dust removal chamber 12 and a right dust removal chamber 11, and a dust removal screen 13 is provided in the dust removal chamber.
[0066] The dust removal screen 13 is a stainless steel screen with an aperture of 0.06 mm.
[0067] A baffle is provided between the dust removal chamber and the granulation chamber 9, and the baffle is located below the left dust removal chamber or the right dust removal chamber.
[0068] The backflush pipe 14 inside the dust removal unit is a backflush pipe for the dust removal screen, and the backflush pipes 14 above the left dust removal chamber 12 and the right dust removal chamber 11 are independently arranged.
[0069] An exhaust gas chamber 15 is further provided above the dust removal unit, and the induced draft fan 16 of the air supply unit and the backflush blower 17 of the backflush unit are both connected to the exhaust gas chamber 15.
[0070] The induced draft fan 16 and the backflush blower 17 are located on opposite sides outside the exhaust gas chamber 15. The outlet of the exhaust gas chamber 15 is connected to the inlet of the induced draft fan 16, and the inlet of the exhaust gas chamber 15 is connected to the outlet of the backflush blower 17.
[0071] Embodiment 3:
[0072] This embodiment provides a fluidized bed granulation device for continuous granulation. The fluidized bed granulation device includes a granulation fluidized bed unit, an air supply unit, a dust removal unit, a particle crushing unit, and a backflush unit. The granulation fluidized bed unit includes a fluidized bed 8 and a granulation chamber 9, and the granulation chamber 9 is directly communicated with the fluidized bed 8 and is located above the fluidized bed 8. The dust removal unit includes left and right dust removal chambers arranged in parallel and is located above the granulation fluidized bed unit. The air supply unit includes a blower 2 and an induced draft fan 16. The outlet of the blower 2 is connected to the granulation fluidized bed unit, and the inlet of the induced draft fan 16 is connected to the gas phase outlet of the dust removal unit.
[0073] The particle crushing unit includes a crushing chamber 3, which is located below the granulation fluidized bed unit and is separated from the granulation fluidized bed unit by a movable baffle. The backflush unit includes two parts of structures. One is the backflush pipe 14 located on the upper side inside the dust removal chamber, and the other is the backflush blower 17 located on the upper part outside the dust removal unit and connected to the dust removal unit.
[0074] A fluidized bed screen 7 is provided at the bottom of the fluidized bed 8 in the granulation fluidized bed unit. A feed inlet 18 is provided on the side wall of the granulation chamber 9, and the raw material powder is soluble starch.
[0075] An atomizer 10 is provided in the granulation chamber 9 for spraying the binder solution, and the number of nozzles of the atomizer 10 is one.
[0076] An air filter 1 is provided in front of the inlet of the blower 2 in the air supply unit.
[0077] The particle crushing unit further includes a crusher 5 and a crushing screen 4. The crusher 5 is arranged in the crushing chamber 3, and the crushing screen 4 is located below the crushing chamber 3. The aperture of the crushing screen 4 is 1.5 mm.
[0078] A transfer chamber 6 is also provided between the granulation fluidized bed unit and the particle crushing unit. The outlet of the air blower 2 is connected to the transfer chamber 6, and a screen is provided at the interface between the air blower 2 and the transfer chamber 6.
[0079] The transfer chamber 6 and the fluidized bed 8 are separated by a fluidized bed screen 7, and the transfer chamber 6 and the crushing chamber 3 are separated by a movable baffle.
[0080] The dust removal unit includes a left dust removal chamber 12 and a right dust removal chamber 11, and a dust removal screen 13 is provided in the dust removal chamber.
[0081] The dust removal screen 13 is a wire mesh with a pore size of 0.12 mm.
[0082] A baffle is provided between the dust removal chamber and the granulation chamber 9, and the baffle is located below the left dust removal chamber or the right dust removal chamber.
[0083] The backflush pipe 14 inside the dust removal unit is a dust removal screen backflush pipe, and the backflush pipes 14 above the left dust removal chamber 12 and the right dust removal chamber 11 are independently provided.
[0084] An exhaust gas chamber 15 is further provided above the dust removal unit. The induced draft fan 16 of the air supply unit and the backflush blower 17 of the backflush unit are both connected to the exhaust gas chamber 15.
[0085] The induced draft fan 16 and the backflush blower 17 are located on opposite sides outside the exhaust gas chamber 15. The outlet of the exhaust gas chamber 15 is connected to the inlet of the induced draft fan 16, and the inlet of the exhaust gas chamber 15 is connected to the outlet of the backflush blower 17.
[0086] Using the fluidized granulation device in the above embodiment for fluidized granulation, its operation process includes: turning on the air blower and the induced draft fan for preheating. After the temperature is stable, turn off the air blower and the induced draft fan. After the material powder enters the fluidized bed through the feed port, close the feed port, turn on the air blower, the induced draft fan, and the dust removal unit, and at the same time turn on the atomizer to atomize the liquid medicine binder to start granulation; after all the liquid medicine binder is atomized, stop the air blower and the induced draft fan, connect the crushing chamber, the transfer chamber, and the fluidized bed, start the backflush blower, send all the coarse particles into the crushing chamber, close the fluidized bed screen and the movable partition, stop the backflush blower, start the crusher to crush, and then obtain particles meeting the specifications through the screening of the crushing screen; while crushing the previous batch of granulated materials, put new materials into the fluidized granulation device through the feed port, turn on the air blower and the induced draft fan, and carry out a new round of granulation.
[0087] As can be seen from the above embodiments, the fluidized granulation device of the present utility model adds a particle crushing unit on the basis of the original granulation fluidized bed, dust removal, backwashing and other units, and improves the structures of the dust removal and backwashing units, so that fluidized granulation can be continuously produced; the dust generated during granulation and blown upward is effectively intercepted by the dust removal unit, and the design of the backwashing pipe reduces the accumulation of materials at the top. The two dust removal chambers can work alternately to ensure continuous production of particles; the setting of the backwashing blower in the backwashing unit can blow the coarse particles after granulation into the crushing unit. Through the structural setting of the particle crushing unit, particles that meet the requirements and have uniform particle sizes are obtained. During the particle crushing process, the next round of granulation process is carried out simultaneously, which helps to improve the granulation efficiency; the device has a reasonable structure design, is easy to operate, has a low cost, high safety, and a wide range of applications.
[0088] The applicant declares that the present utility model uses the above embodiments to illustrate the detailed device of the present utility model, but the present utility model is not limited to the above detailed device, that is, it does not mean that the present utility model must rely on the above detailed device to be implemented. Those skilled in the art should understand that any improvement to the present utility model, equivalent replacement of the device of the present utility model, addition of auxiliary devices, selection of specific methods, etc. all fall within the protection scope and disclosure scope of the present utility model.
Claims
1. A boiling granulation device for continuous granulation, characterized in that: The boiling granulation device comprises a granulation fluidized bed unit, an air supply unit, a dust removal unit, a particle crushing unit and a back-blowing unit; the granulation fluidized bed unit comprises a fluidized bed and a granulation chamber, the granulation chamber is directly connected to the fluidized bed and is located above the fluidized bed; the dust removal unit comprises two left and right dust removal chambers arranged in parallel, which are located above the granulation fluidized bed unit; the air supply unit comprises an air supply fan and an induced draft fan, the outlet of the air supply fan is connected to the granulation fluidized bed unit, and the inlet of the induced draft fan is connected to the gas phase outlet of the dust removal unit; The particle crushing unit includes a crushing chamber, which is located below the granulation fluidized bed unit and is separated from the granulation fluidized bed unit by a movable baffle; the backblowing unit includes two structures, one is a backblowing pipe located on the upper side of the dust removal chamber, and the other is a backblowing blower located on the upper side of the outer side of the dust removal unit and connected to the dust removal unit.
2. The continuous granulation boiling granulation device according to claim 1, characterized in that: A fluidized bed screen is arranged at the bottom of the fluidized bed in the granulation fluidized bed unit, and a feed port is arranged on the side wall of the granulation chamber.
3. The boiling granulation device for continuous granulation according to claim 1, characterized in that: The granulation chamber is provided with an atomizer for spraying the adhesive solution, and the number of the atomizer nozzles includes at least one.
4. The continuous granulation boiling granulation device according to claim 1, characterized in that: An air filter is arranged in front of the inlet of the air blower in the air supply unit.
5. The continuous granulation boiling granulation device according to claim 1, characterized in that: The particle crushing unit further comprises a crusher and a crushing screen. The crusher is arranged in a crushing chamber, and the crushing screen is located below the crushing chamber. The aperture of the crushing screen is 0.18-2.0 mm.
6. The continuous granulation boiling granulation device according to claim 2, characterized in that: A transfer chamber is also provided between the granulation fluidized bed unit and the particle crushing unit, the outlet of the blower is connected to the transfer chamber, and a screen is provided at the interface between the blower and the transfer chamber; The transfer chamber and the fluidized bed are separated by a fluidized bed screen, and the transfer chamber and the crushing chamber are separated by a movable baffle.
7. The continuous granulation boiling granulation device according to claim 1, characterized in that: The dust removal unit comprises a left dust removal chamber and a right dust removal chamber, and a dust removal screen is provided in each of the dust removal chambers; The dust removal screen comprises a stainless steel screen or a gauze screen, and its aperture is 0.06-0.12 mm; A baffle is provided between the dust removal chamber and the granulation chamber, and the baffle is located below the left dust removal chamber or the right dust removal chamber.
8. The boiling granulation device for continuous granulation according to claim 7, characterized in that: The backflush pipe inside the dust removal unit is a dust removal screen backflush pipe, and the backflush pipes above the left dust removal chamber and the right dust removal chamber are independently arranged.
9. The continuous granulation boiling granulation device according to claim 1, characterized in that: An exhaust chamber is also provided above the dust removal unit, and the induced draft fan of the air supply unit and the back-blowing fan of the back-blowing unit are both connected to the exhaust chamber.
10. The boiling granulation device for continuous granulation according to claim 9, characterized in that: The induced draft fan and the anti-blowing fan are located on opposite sides of the exhaust chamber. The outlet of the exhaust chamber is connected to the inlet of the induced draft fan, and the inlet of the exhaust chamber is connected to the outlet of the anti-blowing fan.
Citation Information
Patent Citations
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