Spray dryer capable of preheating feed liquid

Abstract

The spray dryer comprises a preheating device, a drying device and a separating device, the preheating device comprises a preheating box and a water bath box arranged in the preheating box, a box cover is arranged at the top of the preheating box, a partition plate is fixedly connected in the preheating box, a through hole is formed in the partition plate, and the drying device is arranged in the water bath box. The water bath boxes are arranged at the through holes, the water bath boxes are arranged at the two through holes, a stirring mechanism is arranged on the preheating box, the stirring mechanism comprises two rotating shafts and a plurality of stirring rods arranged on the rotating shafts, a water inlet pipe is connected to the preheating box, and a feeding pipe is further arranged on the preheating box; the end, stretching into the water bath box, of the feeding pipe is connected with two feeding pipes through a three-way connector, the ends, away from the three-way connector, of the feeding pipes stretch into the water bath box, the water bath box is further provided with a discharging pipe, the preheating box is provided with a discharging pipe, and one end of the discharging pipe is connected with a drying device. And the other end of the discharging pipe extends into the preheating box and is communicated with the discharging pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of spray drying, in particular to a spray drying machine capable of preheating liquid feed. Background Art

[0002] A spray dryer is a continuous atmospheric pressure dryer, which is a mechanical device that mainly uses heat energy to reduce the moisture content of materials. It sprays the liquid into a mist and dries it in contact with hot air, which can achieve drying and granulation at the same time. Before entering the spray dryer for drying, the liquid generally needs to be preheated to increase the temperature of the liquid in order to improve the drying efficiency. However, in the prior art, the liquid is often heated by an electric heating wire, and the contact area between the liquid and the electric heating wire is limited, resulting in uneven heating of the liquid, thereby affecting the preheating effect of the liquid. Therefore, there are still shortcomings and deficiencies in the prior art. Utility Model Content

[0003] The utility model aims to provide a spray dryer capable of preheating liquid feed to solve the above problems.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is:

[0005] A spray dryer capable of preheating a feed liquid is provided, comprising a preheating device, a drying device connected to the preheating device, and a separating device connected to the drying device, wherein the preheating device comprises a preheating box and a water bath arranged in the preheating box, a box cover is arranged on the top of the preheating box, the box cover is connected to the preheating box flange, a partition is fixedly connected in the preheating box, a through hole is opened on the partition, the water bath is arranged at the through hole, the number of through holes on the partition is two, and the water bath is arranged at the two through holes, a stirring mechanism is arranged on the preheating box, the stirring mechanism comprises a motor, two rotating shafts, and a plurality of stirring rods arranged on the rotating shafts, the motor is fixedly mounted on the box cover, the rotating shaft is arranged vertically, and the The output shaft of the motor is fixedly connected to one of the rotating shafts, the rotating shaft passes through the box cover and is rotatably connected to the box cover through a bearing, one end of the rotating shaft passes through the box cover and extends into the water bath, a plurality of the stirring rods are evenly arranged on the rotating shaft, and two of the rotating shafts are transmission-connected through a belt transmission mechanism, a water inlet pipe is connected to the preheating box, a feed pipe is also provided on the preheating box, one end of the feed pipe extending into the water bath is connected to two feeding pipes through a three-way joint, one end of the feeding pipe away from the three-way joint extends into the water bath, a discharge pipe is also provided on the water bath, a discharge pipe is provided on the preheating box, one end of the discharge pipe is connected to the drying device, and the other end of the discharge pipe extends into the preheating box and is connected to the discharge pipe.

[0006] Furthermore, a limiting portion is fixedly provided on the top of the water bath, the water bath passes through the through hole, and the limiting portion on the water bath abuts against the upper surface of the partition.

[0007] Furthermore, one end of the discharge pipe is connected to the interior of the water bath, and the discharge pipe is arranged at the bottom of the water bath.

[0008] Furthermore, the drying device includes a drying main unit, a first air inlet duct connected to the drying main unit, an atomizer located at the top of the drying main unit, a first discharge duct connected to the bottom of the drying main unit, and a feed duct connected to the atomizer.

[0009] Furthermore, a first discharge pipe is arranged at the bottom of the drying main unit, and the other end of the first discharge pipe is connected to the separation device.

[0010] Furthermore, the atomizer is arranged on the top of the drying main unit and connected to the bottom end of the feed pipe, and the other end of the discharge pipe is connected to the feed pipe.

[0011] Furthermore, the separation device includes a cyclone separator connected to the other end of the first discharge pipe, a bag filter, a first air supply pipe connecting the cyclone separator and the bag filter, a second discharge pipe arranged at the bottom of the cyclone separator, and a third discharge pipe arranged at the bottom of the bag filter.

[0012] Furthermore, one end of the first discharge pipe is connected to the bottom of the drying main unit, and the other end is connected to the side wall of the cyclone separator.

[0013] Furthermore, a temperature sensor is installed in the water bath.

[0014] By adopting the above technical solution, the beneficial effects of the utility model are:

[0015] The spray dryer provided by the utility model comprises a preheating device, a drying device and a separating device. The preheating device comprises a preheating box and a water bath arranged in the preheating box. The preheating box is connected with a water inlet pipe. The preheating box is also provided with a feeding pipe. One end of the feeding pipe extending into the water bath is connected with two feeding pipes through a three-way joint. One end of the feeding pipe away from the three-way joint extends into the water bath. The water bath is also provided with a discharging pipe. The preheating box is provided with a discharge pipe. One end of the discharge pipe is connected with the drying device. The other end of the discharge pipe extends into the preheating box and is connected with the discharge pipe. The hot water in the preheating box is preheated for the feed liquid in the water bath by a water bath heating method, and the heating is convenient. The preheating box is provided with a stirring mechanism. The stirring mechanism comprises two rotating shafts and a plurality of stirring rods arranged on the rotating shafts. The stirring rods can accelerate the flow of the feed liquid in the water bath, so that the feed liquid in the water bath is heated more evenly, thereby ensuring the preheating effect of the feed liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a spray dryer provided by the utility model.

[0017] Figure 2 for Figure 1 A cross-sectional view of the preheating device in the spray dryer shown.

[0018] Reference numerals: 10, preheating device; 11, preheating box; 111, box cover; 112, partition; 113, stirring mechanism; 1131, motor; 1132, rotating shaft; 1133, stirring rod; 1134, belt transmission mechanism; 114, water inlet pipe; 115, feed pipe; 1151, three-way joint; 1152, feed pipe; 116, discharge pipe; 12, water bath; 121, limiter; 122, discharge pipe; 123, temperature sensor;

[0019] 20. Drying device; 21. Drying main unit; 22. First air inlet duct; 23. Atomizer; 24. First discharge duct; 25. Feed duct;

[0020] 30. Separation device; 31. Cyclone separator; 32. Bag filter; 33. First gas pipeline; 34. Second discharge pipeline; 35. Third discharge pipeline. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the utility model in a schematic manner, so it only shows the structure related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] like Figure 1 As shown, the utility model provides a spray dryer capable of preheating liquid feed, comprising a preheating device 10, a drying device 20 connected to the preheating device 10, and a separation device 30 connected to the drying device 20. The preheating device 10 is used to preheat the liquid feed, the drying device 20 is suitable for drying the preheated liquid feed to form a solid and gas mixture, and the separation device 30 is suitable for separating the solid and the gas in the solid and gas mixture and outputting the product.

[0023] like Figure 1 and Figure 2As shown, the preheating device 10 includes a preheating box 11 and a water bath 12 arranged in the preheating box 11. A box cover 111 is arranged on the top of the preheating box 11, and the box cover 111 is flange-connected to the preheating box 11. A partition 112 is fixedly connected to the preheating box 11, and a through hole (not marked) is opened on the partition 112. The water bath 12 is arranged at the through hole. Specifically, a limiting portion 121 is fixedly arranged on the top of the water bath 12, and the water bath 12 passes through the through hole. The limiting portion 121 on the water bath 12 abuts against the upper surface of the partition 112. In this embodiment, the number of through holes on the partition 112 is two, and the water bath 12 is arranged at both of the through holes.

[0024] like Figure 2 As shown, the preheating box 11 is provided with a stirring mechanism 113, which includes a motor 1131, two rotating shafts 1132, and a plurality of stirring rods 1133 arranged on the rotating shafts 1132. The motor 1131 is fixedly mounted on the box cover 111, the rotating shaft 1132 is vertically arranged, and the output shaft of the motor 1131 is fixedly connected to one of the rotating shafts 1132. The rotating shaft 1132 passes through the box cover 111 and is rotatably connected to the box cover 111 through a bearing. The rotating shaft 1132 passes through one end of the box cover 111 and extends into the water bath box 12. A plurality of stirring rods 1133 are evenly arranged on the rotating shaft 1132, and the two rotating shafts 1132 are transmission-connected through a belt transmission mechanism 1134.

[0025] like Figure 2 As shown, the preheating box 11 is connected with a water inlet pipe 114, which is connected with the interior of the preheating box 11. The water inlet pipe 114 is used to add hot water into the preheating box 11. The preheating box 11 is also provided with a water outlet pipe (not shown) for drainage. The preheating box 11 is also provided with a feed pipe 115, and one end of the feed pipe 115 extending into the water bath 12 is connected to two feed pipes 1152 through a three-way joint 1151, and one end of the feed pipe 1152 away from the three-way joint 1151 extends into the water bath 12. The feed liquid to be preheated can be added to the two water baths 12 through the feed pipe 115, and the hot water in the preheating box 11 is used to preheat the liquid in the water bath 12 by water bath heating, which is convenient for heating.

[0026] like Figure 2As shown, the water bath 12 is also provided with a discharge pipe 122, one end of which is in communication with the interior of the water bath 12, and the discharge pipe 122 is arranged at the bottom of the water bath 12. The preheating box 11 is provided with a discharge pipe 116, one end of which is connected to the drying device 20, and the other end of which extends into the preheating box 11 and is in communication with the discharge pipe 122. The preheated liquid in the water bath 12 is transported into the drying device 20 through the discharge pipe 116 for subsequent drying treatment.

[0027] like Figure 1 As shown, the drying device 20 includes a drying main body 21, a first air inlet duct 22 connected to the drying main body 21, an atomizer 23 located at the top of the drying main body 21, a first discharge duct 24 connected to the bottom of the drying main body 21, and a feed duct 25 connected to the atomizer 23; the drying main body 21 is roughly composed of a column and a cone, the first discharge duct 24 is arranged at the bottom of the drying main body 21, and the other end of the first discharge duct 24 is connected to the separation device 30, suitable for outputting the dried product; the first air inlet duct 22 is provided It is arranged on one side of the drying main unit 21, and is used to transport hot air of about 80 degrees Celsius to the inside of the drying main unit 21, so as to exchange heat with the atomized droplets inside the drying main unit 21, so that the atomized droplets evaporate quickly to form particles; the atomizer 23 is arranged on the top of the drying main unit 21 and is connected to the bottom end of the feed pipe 25, and the other end of the discharge pipe 116 is connected to the feed pipe 25. The preheated liquid in the preheating device 10 is transported to the atomizer 23 through the feed pipe 25 for atomization, thereby increasing the surface area of ​​the liquid and accelerating the drying.

[0028] like Figure 1As shown, the separation device 30 includes a cyclone separator 31 connected to the other end of the first discharge pipe 24, a bag filter 32, a first gas pipeline 33 connecting the cyclone separator 31 and the bag filter 32, a second discharge pipe 34 arranged at the bottom of the cyclone separator 31, and a third discharge pipe 35 arranged at the bottom of the bag filter 32. The cyclone separator 31 is connected to the drying main unit 21 through the first discharge pipe 24, one end of the first discharge pipe 24 is connected to the bottom of the drying main unit 21, and the other end is connected to the side wall of the cyclone separator 31. The product dried in the drying main unit 21 enters the cyclone separator 31 through the first discharge pipe 24 to perform the first separation of the solid-gas mixture; the second discharge pipe 34 is located at the bottom of the cyclone separator 31, and the particles dried in the cyclone separator 31 are output as products through the second discharge pipe 34. One end of the first gas pipeline 33 is connected to the top position of the cyclone separator 31, and the other end of the first gas pipeline 33 is connected to the top side wall of the bag filter 32. The solid and gas mixture containing a small amount of particles is output from the first gas pipeline 33 at the top of the cyclone separator 31, and then enters the bag filter 32 for secondary filtration; the third discharge pipeline 35 is located at the bottom of the bag filter 32, and the particles dried in the bag filter 32 are output as products again through the third discharge pipeline 35.

[0029] In some embodiments, such as Figure 2 As shown, a temperature sensor 123 is installed in the water bath 12. The temperature sensor 123 is arranged on the inner bottom surface of the water bath 12. The temperature sensor 123 is used to monitor the temperature of the liquid in the water bath 12. When the temperature of the liquid in the water bath 12 is increased to a preset temperature by water bath heating, the liquid is transported into the drying host 21 for drying.

[0030] When the spray dryer provided by the utility model is used, hot water is first added into the preheating box 11 through the water inlet pipe 114, and liquid feed is added into the water bath box 12 through the feed pipe 115. The liquid feed in the water bath box 12 is heated by a water bath heating method, and the heating is convenient. The heated liquid feed is transported into the drying device 20 through the discharge pipe 116 for subsequent drying treatment. Moreover, the stirring rod 1133 provided on the rotating shaft 1132 can accelerate the flow of the liquid feed in the water bath box 12, so that the liquid feed in the water bath box 12 is heated more evenly, and the preheating effect of the liquid feed is ensured.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The above is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without departing from the scope of the utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A spray dryer capable of preheating a liquid feed, characterized in that: The invention comprises a preheating device, a drying device connected to the preheating device, and a separating device connected to the drying device. The preheating device comprises a preheating box and a water bath arranged in the preheating box. A box cover is arranged on the top of the preheating box, and the box cover is connected to the preheating box flange. A partition is fixedly connected in the preheating box, and a through hole is opened on the partition. The water bath is arranged at the through hole. There are two through holes on the partition, and the water bath is arranged at the two through holes. A stirring mechanism is arranged on the preheating box, and the stirring mechanism comprises a motor, two rotating shafts, and a plurality of stirring rods arranged on the rotating shafts. The motor is fixedly installed on the box cover, and the rotating shaft is arranged vertically. The output shaft of the motor is connected to the through hole. A rotating shaft is fixedly connected, the rotating shaft passes through the box cover and is rotatably connected to the box cover through a bearing, one end of the rotating shaft passes through the box cover and extends into the water bath, a plurality of the stirring rods are evenly arranged on the rotating shaft, and two of the rotating shafts are transmission-connected through a belt transmission mechanism, a water inlet pipe is connected to the preheating box, and a feeding pipe is also arranged on the preheating box, and one end of the feeding pipe extending into the water bath is connected to two feeding pipes through a three-way joint, and one end of the feeding pipe away from the three-way joint extends into the water bath, and a discharging pipe is also arranged on the water bath, and a discharge pipe is arranged on the preheating box, one end of the discharge pipe is connected to the drying device, and the other end of the discharge pipe extends into the preheating box and is connected to the discharge pipe.

2. A spray dryer capable of preheating liquid feed according to claim 1, characterized in that: A limiting portion is fixedly provided on the top of the water bath, the water bath passes through the through hole, and the limiting portion on the water bath abuts against the upper surface of the partition.

3. A spray dryer capable of preheating liquid feed according to claim 1, characterized in that: One end of the discharge pipe is communicated with the interior of the water bath, and the discharge pipe is arranged at the bottom of the water bath.

4. A spray dryer capable of preheating liquid feed according to claim 1, characterized in that: The drying device comprises a drying main unit, a first air inlet duct connected to the drying main unit, an atomizer located at the top of the drying main unit, a first discharge duct connected to the bottom of the drying main unit, and a feed duct connected to the atomizer.

5. A spray dryer capable of preheating liquid feed according to claim 4, characterized in that: The first discharge pipe is arranged at the bottom of the drying main unit, and the other end of the first discharge pipe is connected to the separation device.

6. A spray dryer capable of preheating liquid feed according to claim 4, characterized in that: The atomizer is arranged on the top of the drying main unit and connected to the bottom end of the feed pipe, and the other end of the discharge pipe is connected to the feed pipe.

7. A spray dryer capable of preheating liquid feed according to claim 1, characterized in that: The separation device includes a cyclone separator connected to the other end of the first discharge pipe, a bag filter, a first air pipeline connecting the cyclone separator and the bag filter, a second discharge pipe arranged at the bottom of the cyclone separator, and a third discharge pipe arranged at the bottom of the bag filter.

8. A spray dryer capable of preheating liquid feed according to claim 7, characterized in that: One end of the first discharge pipe is connected to the bottom of the drying main unit, and the other end is connected to the side wall of the cyclone separator.

9. A spray dryer capable of preheating liquid feed according to claim 1, characterized in that: A temperature sensor is installed in the water bath.

Images