Improved fluidized spray drying granulator

Abstract

The utility model discloses an improved fluidization spray drying granulator which comprises a fluidization box, a heater is assembled on the fluidization box, one side of the heater is connected with a fan, the input end of the fan is communicated with the heater, the output end of the heater is communicated with the fluidization box, the fluidization box comprises a fluidization cavity, the fluidization cavity is of a roundabout structure and is divided into two layers, and the two layers of the fluidization cavity are communicated with each other. One end of the lower layer of the fluidization cavity is connected with a fan, a discharge port is formed in one end of the upper layer of the fluidization cavity, an impurity removal port is formed in the horizontal section of the discharge port, and a backflow chamber is assembled at the other end of the upper layer. The fluidization cavity is of a roundabout box type structure and has a larger treatment area, so that more materials can be treated, the production efficiency is improved, and due to the fact that the materials have longer retention time in the length direction, the drying uniformity can be improved, and the phenomenon that the materials are too dry or not dry locally is reduced; and the treatment area is large, and effective drying can be achieved at a low air speed, so that the energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of granulators, in particular to an improved fluidized spray drying granulator. Background Art

[0002] Spray granulator is a new one-step granulation equipment that organically combines spray drying technology with fluidized bed granulation technology. At present, the atomization range of the spray granulator on the market is limited. A part of the atomized liquid that is not fully dried will rise with the airflow and adhere to the top of the granulator, resulting in a waste of raw materials.

[0003] Chinese patent CN213193601U discloses a spray granulator for the production of granular medicines. Compared with the prior art, the sprayer can move on a slide rail, and the nozzle of the sprayer is rotatable, and the range of liquid atomization can be increased by adjusting the movement of the nozzle and the sprayer; during the atomization process, a part of the atomized liquid that has not been fully dried will rise with the airflow, and then adhere to the condensation plate on the top of the spray bin, and the atomized liquid will condense to form powder, and the powder will fall under the action of gravity, providing raw materials for the preparation of drug particles, improving the use efficiency of the liquid, and effectively reducing the waste of raw materials; the first fluidizing orifice plate and the second fluidizing orifice plate are movably connected by a latch, and the opening rate of the fluidizing plate can be controlled by moving the first fluidizing orifice plate and the second fluidizing orifice plate, so that the drug powder can be fluidized smoothly and the quality of the drug is improved.

[0004] It can be seen that in the prior art, in order to solve the problem that some particles in the granulator are not dried in time, condensation is usually used to make the particles that are not dried in time condense into powder and then fall to the bottom of the device by their own gravity, and continue to be sprayed out as raw materials. However, the fluidized spray granulator usually uses hot air to dry the particles, and the hot air has a relatively high temperature, which will have a certain impact on the condensation effect of the condensation plate. At the same time, when the condensed particles fall directly, they will be affected by the rising hot air and cannot flow back to the bottom of the device in time. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] An improved fluidized spray drying granulator comprises a fluidizing box, a heater is arranged on the fluidizing box, a fan is connected to one side of the heater, an input end of the fan is connected to the heater, and an output end of the heater is connected to the fluidizing box, the fluidizing box comprises a fluidizing cavity, the fluidizing cavity is in a circuitous structure and is divided into two layers, one end of the lower layer of the fluidizing cavity is connected to the fan, and the other end of the lower layer is provided with a connecting flange, and the fluidizing cavity is connected to a spray pipe via the connecting flange, one end of the upper layer of the fluidizing cavity is provided with a discharge port, a de-impurity port is provided on the horizontal section of the discharge port, and a reflux chamber is arranged at the other end of the upper layer, a reflux device is arranged on the upper surface of the reflux chamber, and a connecting pipe is provided on the reflux device and is connected to the de-impurity port.

[0008] The chamber of the reflow chamber is connected with the upper chamber of the fluidization chamber, and a streamline baffle is provided at the connection point. A guide plate is connected to the inner wall of the reflow chamber by bolts, and the guide plate is located below the streamline baffle.

[0009] The guide plate is an arched structure as a whole, and when the guide plate is installed on the side wall of the reflow chamber, the arch back faces downward, and the bottom of the streamline baffle is an arc structure.

[0010] The backflow device includes an air suction box installed on the upper surface of the reflux chamber, and the air suction box is provided with through holes on the upper and lower parts. The through holes on the upper surface of the air suction box are connected to the connecting pipe, and the through holes on the lower surface of the air suction box are connected to the reflux chamber. The inside of the air suction box is connected with an impeller by a rotating shaft, and a motor is installed on the outside of the air suction box. The output end of the motor and one end of the rotating shaft on the impeller are connected with pulleys, a belt is sleeved between the two pulleys, and the pulleys and the belts are covered with belt covers.

[0011] A heating tube is installed in the heater, and the heating tube is installed in a spiral shape in the heater, and a plurality of heat sinks are connected to the outer surface of the heating tube.

[0012] An air inlet chamber is integrally arranged at one end of the lower layer of the fluidizing cavity connected to the fan, and the lower surface of the air inlet chamber is designed to be inclined upward, and the air inlet chamber is connected to the fan.

[0013] A bracket is provided on the lower surface of the fluidizing box, and the bracket is made of square tubes spliced ​​together by bolts.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) First, the granulator in the present application is a box-type structure. Compared with the traditional cylinder-type structure, the granulator in the present application is longer. A dryer with a longer length usually has a larger processing area, so it can process more materials and improve production efficiency. Since the material has a longer residence time in the length direction, it helps to improve the drying uniformity and reduce local over-drying or under-drying. The larger processing area can achieve effective drying at a lower wind speed, thereby reducing energy consumption. In addition, the long dryer can be more flexibly arranged on the production line to meet different process requirements.

[0016] (2) The fluidized chamber in the present application is circuitous, and the hot air and the feed port are both arranged at the bottom of the device, so that the hot air can directly contact the ejected particles to dry them. The particles continue to rise under the action of the hot air. Since the device is a long structure and has a circuitous structure inside, the wind force of the hot air is weakened during the rising process, so that qualified particles gather in the upper horizontal section and are discharged through the discharge port, while some powder and smaller particles are blown into the connecting pipe through the impurity removal port at the top of the upper horizontal section. One end of the connecting pipe is connected to a backflow device to blow the powder and smaller particles back into the fluidized chamber for secondary processing. At the same time, in order to make the powder and smaller particles contaminate the spray liquid when entering the cavity to form qualified particles, the present application provides an arc-shaped guide plate between the cavity and the reflux chamber. The powder and smaller particles are thrown to the upper layer of the cavity under the action of the wind force of the backflow device and contact the spray liquid entering the cavity to form large particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the granulator in the utility model Figure 1 .

[0018] Figure 2 The three-dimensional structure of the granulator in the utility model Figure 2 .

[0019] Figure 3 For the utility model Figure 2 Enlarged structural diagram of the reflux device.

[0020] Figure 4 This is a plan view of the interior of the fluidizing chamber in the utility model.

[0021] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0022] 100, fluidizing box; 101, fluidizing chamber; 1011, connecting flange; 10111, spray pipe; 1012, air inlet chamber; 1013, discharge port; 1014, impurity removal port; 1015, return chamber; 1016, streamline baffle; 1017, guide plate; 102, connecting pipe; 103, backflow device; 1031, suction box; 1032, impeller; 1033, motor; 1034, belt cover; 104, heater; 1041, heating tube; 1042, fan; 105, bracket. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0026] See also Figure 1 and Figure 2 The improved fluidized spray drying granulator in this embodiment comprises a fluidizing box 100, a heater 104 is mounted on the fluidizing box 100, and a fan 1042 is connected to one side of the heater 104, the input end of the fan 1042 is connected to the heater 104, and the output end of the heater 104 is connected to the fluidizing box 100, and a bracket 105 is provided on the lower surface of the fluidizing box 100, and the bracket 105 provides support for the device in this application. In order to facilitate assembly, the bracket 105 in this application adopts a square tube and is screwed. The heater 104 is spliced ​​with bolts, and a heating tube 1041 is installed in the heater 104. The heat generated by the heating tube 1041 is extracted by the fan 1042, and the hot air is further blown into the fluidizing box 100 by the fan 1042, so as to dry the spray liquid inside the fluidizing box 100, and also provide power for the discharge of the dried particles. Furthermore, in order to improve the thermal insulation performance, the heating tube 1041 is installed in a spiral shape in the heater 104 in this embodiment, and in order to accelerate the heat transfer, a plurality of heat sinks are connected to the outer surface of the heating tube 1041.

[0027] See also Figure 4 , is a diagram of the internal structure of the fluidizing box 100 in this embodiment, the fluidizing box 100 includes a fluidizing chamber 101, and the fluidizing chamber 101 provides space for the drying and flow of the spray liquid. Further, in order to allow the material to have a longer residence time in the fluidizing chamber 101 and improve the drying uniformity, the fluidizing chamber 101 in this embodiment is divided into two layers in a circuitous structure, one end of the lower layer of the fluidizing chamber 101 is connected to the fan 1042, and the other end of the lower layer is provided with a connecting flange 1011, and the fluidizing chamber 101 is connected to the spray pipe 10111 through the connecting flange 1011. The hot air blown by the fan 1042 and the feed port formed by the spray pipe 10111 are both arranged at the two ends of the bottom of the lower layer of the device, so that the hot air and the spray liquid are counteracted, the spray liquid is dried in a short time, and the spray liquid is condensed into relatively round particles. The particles continue to rise under the action of the hot air. Since the device is a long body structure and the internal structure is circuitous, the wind force of the hot air is weakened during the rising process, so that the qualified particles are concentrated in the upper horizontal section. The dried particles are discharged through the discharge port 1013 provided at one end of the upper layer of the fluidizing cavity 101;

[0028] Considering that it is inevitable to encounter unformed powder and particles with a smaller diameter after forming in the actual fluidization process, in this embodiment, a de-impurity port 1014 is opened on the horizontal section of the discharge port 1013, and a reflux chamber 1015 is installed at the other end of the upper layer. The upper surface of the reflux chamber 1015 is equipped with a backflow device 103, and a connecting pipe 102 is provided on the backflow device 103 to communicate with the de-impurity port 1014. The powder and smaller particles are blown into the connecting pipe 102 through the de-impurity port 1014 at the top of the upper horizontal section. The backflow device 103 connected to one end of the connecting pipe 102 blows the powder and smaller particles back into the fluid. In order to carry out secondary processing in the fluidizing chamber 101, and at the same time, in order to make the powder and smaller particles be contaminated with the spray liquid when entering the fluidizing chamber 101 to form qualified particles, the present application connects the chamber of the reflux chamber 1015 with the upper chamber of the fluidizing chamber 101, and a streamline baffle 1016 is provided at the connecting point. A guide plate 1017 is bolted to the inner wall of the reflux chamber 1015, and the guide plate 1017 is located below the streamline baffle 1016. The powder and smaller particles are thrown to the upper layer of the fluidizing chamber 101 under the action of the wind force of the backflow device, and contact with the spray liquid entering the fluidizing chamber 101 to form large particles.

[0029] See also Figure 3103 is a structural diagram of the backflow device 103 in this embodiment. The backflow device 103 includes an air suction box 1031 installed on the upper surface of the reflux chamber 1015, and the air suction box 1031 is provided with through holes on the upper and lower sides. The through holes on the upper surface of the air suction box 1031 are connected to the connecting pipe 102, and the through holes on the lower surface of the air suction box 1031 are connected to the reflux chamber 1015. The inside of the air suction box 1031 is connected to an impeller 1032 by a rotating shaft, and the outer side of the air suction box 1031 is equipped with a motor 1033. The output end of the motor 1033 and one end of the rotating shaft on the impeller 1032 are connected to pulleys, and a belt is sleeved between the two pulleys. In this embodiment, powder and particles with smaller diameters are blown into the impurity removal port 1014 under the action of hot air. At the same time, the motor 1033 in the backflow device is driven to rotate by the belt and the pulley. The impeller 1032 on the shaft rotates. For safety, the pulley and the belt are covered with a belt cover 1034. During the rotation of the impeller 1032, a certain suction force is generated at the upper end of the suction box 1031, so that the powder in the connecting pipe 102 connected to the impurity removal port 1014 and the particles with smaller diameters are sucked into the suction box 1031, and discharged into the reflux chamber 1015 through the opening at the bottom of the suction box 1031 for secondary processing. The design of the impeller 1032 can firstly provide suction for the backflow device 103, and can discharge the powder and the particles with smaller diameters into the reflux chamber 1015. At the same time, the impeller 1032 is composed of a plurality of blades, and a cavity is formed between adjacent blades to realize intermittent feeding, thereby avoiding agglomeration caused by too much powder entering the fluidizing cavity 101 at one time.

[0030] See also Figure 4 In order to make the hot air act better on the spray liquid and make the hot air blow the dried and formed particles evenly so that the particles have the ability to move upward, the present application has an air inlet chamber 1012 integrally arranged at one end of the lower layer of the fluidizing cavity 101 connected to the fan 1042, and the lower surface of the air inlet chamber 1012 is designed to be inclined upward, and the air inlet chamber 1012 is connected to the fan 1042. The inclined design can reduce the wind loss to a certain extent.

[0031] In summary, the sulfurized spray dryer in the present application utilizes the fluidized cavity 101 to dry the injected spray liquid into granules. Since the fluidized cavity 101 is a box-type structure as a whole and has a long length, the granulator in the present application has a larger processing area, can process more materials, and improve production efficiency. Since the material has a longer residence time in the length direction, it helps to improve the drying uniformity and reduce the local over-drying or under-drying phenomenon. The larger processing area can achieve effective drying at a lower wind speed. The specific working process is: the spray liquid input device is connected by the spray pipe 10111, and the spray liquid is sprayed into the fluidized cavity 101 through the spray pipe 10111. At the same time, the heating pipe 1041 in the heater 104 is started, and the fan 1042 is used to Hot air is blown into the fluidizing chamber 101 to dry and display the injected liquid. Due to the convection between the hot air and the liquid spray, the particles are rounded to a certain extent. As the hot air blows, the dried particles flow to the upper layer of the fluidizing chamber 101 and gather in the horizontal section and can be discharged through the discharge port 1013. The powder mixed in the particles and the particles with smaller diameters will enter the connecting pipe 102 through the de-impurity port 1014 due to their lighter texture. The connecting pipe 102 is connected to the backflow device 103, and the powder and the particles with smaller diameters are transported to the reflux chamber 1015 through the impeller 1032 in the backflow device 103, and are discharged back into the fluidizing chamber 101 under the guidance of the guide plate 1017 and combined with the newly entered liquid spray to form qualified particles.

[0032] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An improved fluidized spray drying granulator, comprising a fluidizing box (100), wherein the fluidizing box (100) is equipped with a heater (104), and a fan (1042) is connected to one side of the heater (104), the input end of the fan (1042) is connected to the heater (104), and the output end of the heater (104) is connected to the fluidizing box (100), Features: The fluidizing box (100) comprises a fluidizing chamber (101), the fluidizing chamber (101) presenting a circuitous structure and being divided into two layers, one end of the lower layer of the fluidizing chamber (101) being connected to a fan (1042), and the other end of the lower layer being provided with a connecting flange (1011), and the fluidizing chamber (101) being connected to a spray pipe (10111) via the connecting flange (1011), one end of the upper layer of the fluidizing chamber (101) being provided with a discharge port (1013), a de-impurity port (1014) being provided on a horizontal section of the discharge port (1013), and a reflow chamber (1015) being provided on the other end of the upper layer, and a backflow device (103) being provided on the upper surface of the backflow chamber (1015), and a connecting pipe (102) being provided on the backflow device (103) and being connected to the de-impurity port (1014).

2. The improved fluidized spray drying granulator according to claim 1, characterized in that: The chamber of the reflow chamber (1015) is connected to the upper chamber of the fluidizing chamber (101), and a streamline baffle (1016) is provided at the connection point. A guide plate (1017) is connected to the inner wall of the reflow chamber (1015) by means of bolts, and the guide plate (1017) is located below the streamline baffle (1016).

3. An improved fluidized spray drying granulator according to claim 2, characterized in that: The guide plate (1017) is an overall arch-shaped structure, and when the guide plate (1017) is installed on the side wall of the reflow chamber (1015), the back of the arch faces downward, and the bottom of the streamline baffle (1016) is an arc-shaped structure.

4. An improved fluidized spray drying granulator according to claim 3, characterized in that: The backflow device (103) comprises an air suction box (1031) installed on the upper surface of the reflux chamber (1015), and the air suction box (1031) is provided with through holes at the top and bottom, the through holes on the upper surface of the air suction box (1031) are connected to the connecting pipe (102), and the through holes on the lower surface of the air suction box (1031) are connected to the reflux chamber (1015), the inside of the air suction box (1031) is connected to an impeller (1032) by a rotating shaft, and the outside of the air suction box (1031) is equipped with a motor (1033), the output end of the motor (1033) and one end of the rotating shaft on the impeller (1032) are connected to pulleys, a belt is sleeved between the two pulleys, and the pulleys and the belt are covered with a belt cover (1034).

5. The improved fluidized spray drying granulator according to claim 1, characterized in that: A heating tube (1041) is installed in the heater (104), and the heating tube (1041) is installed in a spiral shape in the heater (104), and the outer surface of the heating tube (1041) is connected to a plurality of heat sinks.

6. The improved fluidized spray drying granulator according to claim 1, characterized in that: An air inlet chamber (1012) is integrally provided at one end of the lower layer of the fluidizing cavity (101) connected to the fan (1042), and the lower surface of the air inlet chamber (1012) is designed to be inclined upward, and the air inlet chamber (1012) is connected to the fan (1042).

7. The improved fluidized spray drying granulator according to claim 1, characterized in that: A bracket (105) is provided on the lower surface of the fluidizing box (100), and the bracket (105) is made of square tubes spliced ​​together using bolts.

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