A combined dryer for drying fish meal and meat and bone meal

Abstract

A combined dryer for drying fish meal and meat and bone meal comprises a first drying section and a second drying section, wherein the second drying section comprises a closed shell, a feeder, a steam heating device, a material agitator and a collecting device, wherein the stirring section of the material agitator is located in an inner cavity, the steam delivery port of the steam heating device is connected to the air inlet of the closed shell, the feed port of the feeder is connected to the powder outlet of the first drying section, the feed port of the feeder is connected to the feed port of the closed shell, the collecting port of the collecting device is connected to the discharge port of the closed shell, the stirring section is located at the lower part of the inner cavity, and a classifier capable of cutting materials and screening and passing small particle materials is arranged at the upper part of the inner cavity, and the classifier is connected to the classifier motor via a transmission rod passing through the closed shell. The advantages of the present invention are: the classifier screens the materials to achieve full crushing of the materials, and the powder classification efficiency is high and the effect is good.

Description

Technical Field

[0001] The invention relates to a drying device, in particular to a combined drying machine for drying fish meal and meat-bone meal. Background Art

[0002] The applicant originally had a Chinese invention patent application with application number CN201910856798.2 and the name of "A fish slurry drying device", which disclosed a fish slurry drying device, including a shell, a feed port is arranged at the upper part of one end of the shell, a discharge port is arranged at the other end of the shell, a feeding part is arranged in the inner cavity of the shell, one end of the feeding part is sealed with the corresponding shell and rotatably connected together, the other end of the feeding part is sealed through the corresponding shell and connected to the driving mechanism, the feeding part includes two rotating shafts horizontally inserted in the inner cavity of the shell and can rotate separately, and a second feeding part is axially arranged at the bottom of the inner cavity of the shell below the feeding part, and the second feeding part is connected to the second driving mechanism. The advantages of this invention are: avoiding dead angles in the inner cavity of the shell, reducing the phenomenon of coking and solidification of materials at the bottom of the inner cavity of the shell, achieving full drying of the materials, and making the use of the drying device safer, and also facilitating the subsequent cleaning of the shell. However, the device cannot screen the dried materials, and the material collection effect after drying is not ideal, so the structure of the device needs to be further improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a combined dryer for drying fish meal and meat and bone meal, which has good material drying effect and can screen materials, in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows: the combined dryer for drying fish meal and meat-bone meal comprises a first drying section capable of drying fish slurry and meat-bone slurry into powder, and is characterized in that: the combined dryer also comprises a second drying section capable of drying and screening the powder, the second drying section comprises a closed shell for drying the powder, a feeder for adding the powder into the inner cavity of the closed shell, a steam heating device for heating the powder, a material agitator for forming a steam vortex in the inner cavity of the closed shell, and a collecting device for collecting the dried powder. The collecting device comprises: the stirring part of the material stirrer is located in the inner cavity, the steam delivery port of the steam heating device is connected with the air inlet of the closed shell, the feeding port of the feeder is connected with the powder outlet of the first drying part, the feeding port of the feeder is connected with the feeding port of the closed shell, the collecting port of the collecting device is connected with the discharge port of the closed shell, the stirring part is located at the lower part of the inner cavity, and a classifier capable of cutting materials and screening and passing small particle materials is arranged at the upper part of the inner cavity, and the classifier is connected with the classifier motor via a transmission rod passing through the closed shell.

[0005] As an improvement, the classifier includes a transmission rod, a swirl plate, a first blade group, a grading disk and a second blade group. The swirl plate, the first blade group, the grading disk and the second blade group are connected to the transmission rod in sequence from bottom to top, and screening holes that can screen and pass small particle materials are distributed on the grading disk.

[0006] As a further improvement, both the first blade set and the second blade set are spiral blade sets.

[0007] As a further improvement, a second swirl blade is provided on the transmission rod between the grading disk and the first blade assembly.

[0008] As an improvement, the collecting device includes a separator, a bag dust collector and an induced draft fan. The inner cavity of the separator is connected to the discharge port of the closed shell through a pipeline. A discharge valve is provided on the discharge port of the separator. The inner cavity of the separator is connected to the dust removal chamber of the bag dust collector through a pipeline. The dust removal chamber of the bag dust collector is connected to the suction port of the induced draft fan; the discharge valve is used to close the fan.

[0009] As an improvement, the feeder includes a feeding pipe and a conveying pipe, a feeding hopper is arranged on the feeding port of the feeding pipe, the discharge port of the feeding pipe is connected with the feeding port of the closed shell, the feeding hopper is connected with the outlet of the conveying pipe, the inlet of the conveying pipe is connected with the powder outlet of the first drying section, a screw conveying shaft is arranged in the conveying pipe, and the screw conveying shaft is connected with the screw conveying shaft motor transmission.

[0010] As an improvement, the steam heating device includes a blower and a steam heater, the steam delivery port of the steam heater is connected to the air inlet of the closed shell, and the steam input port of the steam heater is connected to the air supply port of the blower.

[0011] As an improvement, the material agitator includes a stirring mechanism and a stirring motor, the stirring mechanism is a spiral blade group, the spiral blade group is located at the lower part of the inner cavity, and the bottom of the spiral blade group extends out of the closed shell and is connected to the stirring motor transmission.

[0012] As an improvement, the first drying section includes a shell, a feed port for inputting materials to be dried is arranged at the upper part of one end of the shell, a powder outlet for outputting dried materials is arranged at the other end of the shell, a feeding section capable of drying materials and pushing them to the discharge port is arranged in the inner cavity of the shell, one end of the feeding section is sealed and rotatably connected to the corresponding shell, the other end of the feeding section is sealed and connected to the driving mechanism through the corresponding shell, the feeding section includes two rotating shafts horizontally inserted in the inner cavity of the shell and capable of rotating separately, a stirring section is axially arranged at the bottom of the inner cavity of the shell below the feeding section, the stirring section includes a rotating shaft, and shovel blades capable of shoveling materials deposited on the bottom of the inner cavity of the shell, the shovel blades are distributed on the outer circumference of the rotating shaft, one end of the rotating shaft is sealed and rotatably connected to the corresponding shell, the other end of the rotating shaft is sealed and connected to the second driving mechanism through the corresponding shell, the second driving mechanism includes an intermittent driving mechanism and a second driving motor capable of driving the rotating shaft to rotate intermittently, one end of the intermittent driving mechanism is transmission-connected to the second driving motor, and the other end of the intermittent driving mechanism is connected to the rotating shaft.

[0013] Further improvement, the intermittent drive mechanism includes a transmission gear meshing with the gear at the end of the rotating shaft, an intermittent drive plate concentrically connected to the transmission gear, and a transmission plate, the transmission plate is connected to the drive shaft of the second drive motor, a transmission plate drive rod is arranged on the transmission plate, and notches that can be inserted into the transmission plate drive rod are evenly distributed on the intermittent drive plate, the intermittent drive plate and the transmission plate are arranged together so as to be rotatable relative to each other, and when the transmission rod is inserted into the notch, the transmission plate drives the intermittent drive plate to rotate.

[0014] Compared with the prior art, the advantages of the present invention are as follows: by adding a classifier to the upper part of the inner cavity of the closed shell used for drying, the material can be screened, and the small particles cut by the stirring mechanism and the classifier leave from the top of the closed shell for collection, while the large particles are retained in the closed shell and continuously stirred and cut until they become small particles that can pass through the screening holes, thereby achieving full crushing of the material, high powder classification efficiency and good effect; the classifier is provided with a multiple separation structure, and multiple classification of the material is achieved through swirl sheets and grading disks, making the finished powder finer; the stirring mechanism is a mechanical structure with high stability, and a spiral blade group is used to make the material crushing and drying more complete; in the inner cavity of the closed shell, the blower passes high-speed steam into the inner cavity, and the relative speed between the material and the hot air is large, so the material drying time is short, and the dried material can be sucked into the separator by the suction fan to avoid continued contact with the hot air in the inner cavity, so this machine The device can be used to process heat-sensitive materials; because the materials are broken, washed and collided during the drying process, the surface area increases, and the hottest air does not directly contact the dried materials, which can make the inlet temperature higher than the melting point of the materials, so the drying intensity of the equipment is large; by setting swirl plates and grading disks in the closed shell and coordinating with the inlet temperature, the moisture content of the dried materials and the fineness of the finished products can be effectively controlled; the second drying section operates under micro-pressure, and adopts different dust removal methods and materials (pulse bag dust collector, water curtain dust collector, Venturi wet dust collector, etc.) according to different materials, which can eliminate environmental pollution; according to different materials, the feeder and discharging device take different forms to meet the requirements of automatic, continuous feeding and smooth discharging; according to different material properties (density, bulk density, viscosity, fineness, initial moisture, final moisture, angle of repose, etc.), select blowers, induced draft fans, agitators, feeders, etc. to make the matching power optimal. The stirring section in the first drying section scoops up the material adhering to the inner wall of the shell through the shovel blade and re-stacks it into the inner cavity of the shell, thereby reducing the phenomenon of carbonization and solidification of the material at the bottom of the inner cavity of the shell; the shovel blade does not have a spiral structure, so it will not push the insufficiently dried material forward while scraping, thereby ensuring that the fish meal or fish slurry is fully dried, the drying effect is good, and the discharge quality is uniform and stable; the center lines of the three rotating shafts are arranged in a triangle or distributed in an isosceles triangle. Under the mutual rotation of the three rotating shafts, the material in the shell is more easily fully stirred and turned, which is more conducive to material drying and transportation, and the quality of the material is also improved accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of an embodiment of the present invention;

[0016] Figure 2 for Figure 1 A stereogram at another angle;

[0017] Figure 3 yes Figure 1 The structural breakdown diagram of

[0018] Figure 4 yes Figure 1 A perspective view of the second drying section;

[0019] Figure 5 yes Figure 4 A three-dimensional view after a portion of the closed shell is cut away;

[0020] Figure 6 yes Figure 5 A stereogram of the middle grader;

[0021] Figure 7 yes Figure 1 A three-dimensional diagram of the first drying section;

[0022] Figure 8 for Figure 7 A cross-sectional view showing the internal structure of the shell cut along the central axis;

[0023] Fig. 9 yes Figure 7 A three-dimensional diagram of the middle stirring section;

[0024] Fig.10 yes Fig. 9 Front projection of

[0025] Fig.11 yes Fig.10 Sectional view along line AA;

[0026] Fig.12 yes Figure 7 The structural schematic diagram showing the installation relationship of the two rotating shafts in the feeding part;

[0027] Fig.13 yes Figure 7 The structural diagram showing the installation relationship between the feeding part and the stirring part;

[0028] Fig.14 yes Figure 7 A three-dimensional diagram showing the inner structure of the shell with both ends of the shell opened;

[0029] Fig.15 yes Fig.14 A three-dimensional diagram after removing the feeding part and the stirring part;

[0030] Fig.16 yes Fig.15 A stereogram at another angle;

[0031] Fig.17 yes Figure 7 A schematic diagram of the structure of the matching relationship between the two rotating shafts;

[0032] Fig.18 yes Fig.17An exploded view of the structure of one of the rotating shafts;

[0033] Fig.19 yes Fig.18 The three-dimensional image after removing the bearings at both ends;

[0034] Fig. 20 yes Figure 8 A magnified view of part I;

[0035] Fig.21 yes Figure 8 Enlarged view of part II;

[0036] Fig. 22 yes Figure 1 A perspective view of the first drying section of the second type is adopted;

[0037] Fig.23 yes Fig. 22 A cross-sectional view of the first drying section along the central axis showing the internal structure of the shell. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 21 As shown, the combined dryer for drying fish meal and meat-bone meal of this embodiment comprises a first drying section capable of drying fish slurry and meat-bone slurry into powder and a second drying section capable of drying and screening the powder. The second drying section comprises a closed shell 6 for drying the powder, a feeder 7 for adding the powder into the inner cavity 61 of the closed shell 6, a steam heating device 8 for heating the powder, a material agitator 9 for forming a steam vortex in the inner cavity 61 of the closed shell 6, and a collecting device 10 for collecting the dried powder. The stirring device 9 of the material agitator 9 is used to stir the powder. The first drying section is located in the inner cavity 61, the steam delivery port of the steam heating device 8 is communicated with the air inlet of the closed shell 6, the feed port of the feeder 7 is communicated with the powder outlet of the first drying section, the feed port of the feeder 7 is communicated with the feed port of the closed shell 6, the collecting port of the collecting device 10 is communicated with the discharge port of the closed shell 6, the stirring section is located in the lower part of the inner cavity 61, and a classifier that can cut materials and screen and pass small particle materials is provided at the upper part of the inner cavity 61, and the classifier is connected to the classifier motor 62 via a transmission rod 63 passing through the closed shell 6.

[0040] The classifier includes a transmission rod 63, a swirl blade 64, a first blade group 65, a grading disk 66, and a second blade group 67. The swirl blade 64, the first blade group 65, the grading disk 66, and the second blade group 67 are sequentially connected to the transmission rod 63 from bottom to top. Screening holes that can screen and pass small particles are distributed on the grading disk 66. Both the first blade group 65 and the second blade group 67 are spiral blade groups. A second swirl blade 68 is arranged on the transmission rod 63 between the grading disk 66 and the first blade group 65. The collecting device 10 includes a separator 101, a bag dust collector 102 and an induced draft fan 103. The inner cavity of the separator 101 is connected to the discharge port of the closed shell 6 through a pipeline. A discharge valve 104 is arranged on the discharge port of the separator 101. The inner cavity of the separator 101 is connected to the dust removal chamber of the bag dust collector 102 through a pipeline. The dust removal chamber of the bag dust collector 102 is connected to the suction port of the induced draft fan 103; the discharge valve 104 is a fan off. The top of the transmission rod 63 is connected to the output shaft of the classifier motor 62 through a coupling. The classifier motor 62 is fixed to the top surface of the closed shell 6 through a bracket. The grading disk 66 can adopt a detachable structure, and the aperture size of the screening hole is selected according to the processing requirements. The aperture size of the screening hole is usually 0.2 to 0.8 mm. The specific structures of the separator 101, the bag filter 102, the induced draft fan 103 and the air shut-off fan belong to the known technology and will not be described in detail.

[0041] The feeder 7 includes a feed pipe and a delivery pipe 72. A feed hopper 71 is provided on the feed port of the feed pipe. The discharge port of the feed pipe is connected to the feed port of the closed shell 6. The feed hopper 71 is connected to the outlet of the delivery pipe 72. The inlet of the delivery pipe 72 is connected to the powder outlet 13 of the first drying section. A screw conveying shaft is provided in the delivery pipe 72. The screw conveying shaft is connected to the screw conveying shaft motor 73 by transmission. A slope can be provided in the feed pipe so that the material enters the inner cavity 61 of the closed shell 6 due to gravity. A feeding screw can also be provided in the feed pipe to push the material into the inner cavity 61 of the closed shell 6 through the screw.

[0042] The steam heating device 8 includes a blower 82 and a steam heater 81. The steam delivery port of the steam heater 81 is connected to the air inlet of the closed shell 6, and the steam input port of the steam heater 81 is connected to the air supply port of the blower 82. The specific structure of the blower 92 and the steam heater 91 belongs to the known technology, so it will not be described in detail.

[0043] The material agitator 9 includes a stirring mechanism 91 and a stirring motor 92. The stirring mechanism 91 is a spiral blade group, which is located at the lower part of the inner cavity. The bottom of the spiral blade group extends out of the closed shell 6 and is connected to the stirring motor 92. The rotating shaft of the spiral blade group is connected to the output shaft of the stirring motor 92 through a coupling.

[0044] A steam heater is connected to the air outlet of the blower for steam heating, a closed shell is connected to the left side of the steam heater for drying materials, a feeder is connected to one side of the closed shell for adding materials, a mechanical stirring mechanism is arranged in the lower end of the closed shell for crushing and drying materials, a stirring motor is connected to the lower end of the mechanical stirring mechanism for providing power, a classifier is installed at the upper end of the closed shell for separating powders, a classifier motor is installed at the top of the classifier for providing power, a transmission rod is connected to the output end of the classifier motor for providing connection, a second blade group is installed on the transmission rod for crushing materials, a grading disk is installed under the second blade group for separating coarse powder, a first blade group is installed under the grading disk for crushing materials, a swirl sheet is installed under the first blade group for separating fine powder, a separator is connected to the left side of the top of the closed shell through a connecting pipe for collecting products, a relevant fan is installed at the end of the separator for conveying materials, the separator pipeline is connected to the bag dust collector for dust removal, and the bag dust collector pipeline is connected to the induced draft fan for extracting gas. The mechanical stirring mechanism is equipped with a spiral blade group, which can contact the material in multiple dimensions and crush the material more fully. The first blade group and the second blade group are both spiral blade groups, and the classifier is set with multiple classifications, so the powder is crushed more completely. This machine operates under micro-pressure and adopts different dust removal methods and materials (pulse bag dust collector, water curtain dust collector, Venturi wet dust collector, etc.) according to different materials, which can eliminate environmental pollution; according to different materials, the feeder and discharging device adopt different forms to achieve automatic, continuous feeding and smooth discharging requirements; according to different material properties (density, bulk density, viscosity, fineness, initial moisture, final moisture, angle of repose, etc.), select blowers, induced draft fans, agitators, feeders, etc. to make the matching power optimal.

[0045] Start the second drying section, the blower, induced draft fan and shut-off fan start working, the stirring motor drives the mechanical stirring mechanism to rotate, the blower sends the steam generated by the steam heater into the inner cavity of the closed shell from the tangential direction, and forms a strong vortex rotating airflow together with the mechanical stirring mechanism, and the wet material is quantitatively added into the closed shell from the feeder, and is crushed and dried under the action of stirring and vortex airflow, the classifier motor on the top of the closed shell rotates to drive the classifier to rotate, the first blade group and the second blade group on the classifier further crush and dry the powder, the fine powder passes through the swirl sheet and the grading disk on the classifier and is discharged from the top of the closed shell, the larger particles are intercepted, and are crushed and dried again through the mechanical stirring mechanism, the fine powder is collected into products through the separator at the back, and the coarse powder returns to the top of the closed shell to continue to be crushed and dried.

[0046] The first drying section includes a shell 1, a feed port 11 for inputting materials to be dried is arranged at the upper part of one end of the shell 1, a discharge port 13 for outputting dried materials is arranged at the other end of the shell 1, a feeding section capable of drying materials and pushing the materials to the discharge port 13 is arranged in the inner cavity of the shell, one end of the feeding section is sealed and rotatably connected to the corresponding shell 1, the other end of the feeding section is sealed and passes through the corresponding shell 1 to be connected to the driving mechanism, the feeding section includes two rotating shafts 2 horizontally inserted in the inner cavity of the shell and capable of rotating separately, a stirring section is axially arranged at the bottom of the inner cavity of the shell below the feeding section, the stirring section includes a rotating shaft 3, and shovel blades 31 capable of shoveling materials deposited on the bottom of the inner cavity of the shell, the shovel blades 31 are distributed on the outer circumference of the rotating shaft 3, one end of the rotating shaft 3 is sealed and rotatably connected to the corresponding shell 1, the other end of the rotating shaft 3 is sealed and passes through the corresponding shell 1 to be connected to the second driving mechanism.

[0047] The second driving mechanism includes an intermittent driving mechanism and a second driving motor 32 that can drive the rotating shaft 3 to rotate intermittently. One end of the intermittent driving mechanism is connected to the second driving motor 32 by transmission, and the other end of the intermittent driving mechanism is connected to the rotating shaft 3. The intermittent driving mechanism includes a transmission gear 34 meshing with a gear 33 at the end of the rotating shaft 3, an intermittent driving disk 35 concentrically connected to the transmission gear 34, and a transmission disk 36. The transmission disk 36 is connected to the driving shaft of the second driving motor 32 by transmission. A transmission rod 361 is arranged on the transmission disk 36. Notches 351 that can be inserted into the transmission rod 361 are evenly distributed on the intermittent driving disk 35. The intermittent driving disk 35 and the transmission disk 36 can be relatively rotatably arranged together. When the transmission rod 361 is inserted into the notch 351, the transmission disk 36 drives the intermittent driving disk 35 to rotate. There are three shovel blades 31. The front projection of the three shovel blades 31 is U-shaped. The opening of the U-shaped shovel blade faces the same rotation direction. The three shovel blades 31 are evenly distributed on the outer circumference of the rotating shaft 3.

[0048] The bottom surface of the inner wall of the shell is an arc surface that matches the outer shape of the lower part of the feeding part. A material accumulation recess 12 that can prevent the stirring part from directly contacting the feeding part is provided on the arc surface corresponding to the bottom of the inner cavity of the shell. The stirring part is located in the material accumulation recess 12. The rotating shaft 3 is a hollow structure with openings at both ends. The end opening at one end of the rotating shaft 3 is a steam inlet that can be connected to the steam pipe 5 to input steam into the rotating shaft 3. The end opening at the other end of the rotating shaft 3 is a liquid outlet that can discharge the steam and cooling liquid that have dropped in temperature after drying the material in the inner cavity of the rotating shaft. The steam outlet is connected to the steam pipe 5 through the through hole on the gear 33 at the end of the rotating shaft.

[0049] The specific structure of the feeding part is that two rotating shafts 2 that can rotate independently are horizontally arranged in the inner cavity of the shell, one end of each rotating shaft 2 is sealed and rotatably connected to the corresponding shell 1, and the other end of each rotating shaft 2 is sealed and passes through the corresponding shell 1 to be transmission-connected to the corresponding rotating shaft driving motor 21, and hollow drying discs 4 are axially spaced on the outer wall of each rotating shaft 2, and a pushing plate 41 that can push the material to the discharge port 13 is arranged on the outer peripheral wall of each drying disc 4. The drying disc bodies 4 are sequentially extended into the gaps between the corresponding drying disc bodies 4 of the other rotating shaft 2. Any rotating shaft 2 is a hollow structure with openings at both ends. The inner cavity of the drying disc body 4 is connected to the inner cavity 22 of the corresponding rotating shaft. The end opening at one end of any rotating shaft 2 is an air inlet opening 23 that can be connected to the steam pipe 5 to input steam into the inner cavity 22 of the corresponding rotating shaft. The end opening at the other end of any rotating shaft 2 is an air outlet opening that can discharge the steam and cooling liquid whose temperature drops after the drying material in the inner cavity 22 of the corresponding rotating shaft.

[0050] The side walls of any rotating shaft 2 are all sealed peripheral walls. A side wall air inlet 24 and a side wall liquid outlet 25 are provided at the peripheral wall position corresponding to the corresponding drying disk body cavity 42. A liquid outlet shell 26 is provided at the position corresponding to the side wall liquid outlet 25 in any rotating shaft cavity 22. The inner cavity of the liquid outlet shell 26 is connected with the corresponding side wall liquid outlet 25. One end of the liquid outlet shell 26 corresponding to the air inlet opening 23 of the rotating shaft 2 is sealed. One end of the liquid outlet shell 26 corresponding to the air outlet opening of the rotating shaft 2 is provided with a liquid outlet 261. The inner cavity of the liquid outlet shell 26 is connected with the air outlet opening through the liquid outlet 261. An end sealing plate 27 capable of preventing the cooling liquid from flowing back to the steam-passing inner cavity of the rotating shaft is provided on the inner wall of the rotating shaft corresponding to the liquid outlet 261. The end sealing plate 27 is sealedly connected with the outer wall of the liquid outlet shell 26.

[0051] An end face sealing plate 28 for closing the corresponding end opening is provided at the end opening of the rotating shaft corresponding to the end sealing plate 27, and a cylindrical liquid outlet cylinder body 29 is provided in the middle of the end face of the end sealing plate 27. One end of the liquid outlet cylinder body 29 passes through the end face sealing plate 28 and is connected to the gas outlet opening. A buffer chamber 281 for accumulating steam and cooling liquid whose temperature drops after drying the material is provided between the inner wall of the rotating shaft corresponding to the end face sealing plate 28 and the end sealing plate 27. A cylinder wall opening 291 for connecting the inner cavity of the liquid outlet cylinder body and the buffer cavity 281 is provided on the side wall of the liquid outlet cylinder body 29. The steam and cooling liquid whose temperature drops after drying the material flowing into the buffer cavity 281 from the liquid outlet shell 26 flow into the inner cavity of the liquid outlet cylinder body through the cylinder wall opening 291 and then are discharged from the inner cavity of the liquid outlet cylinder body into the corresponding rotating shaft 2. Solid round steel bars 43 are arranged at intervals on the side wall of any drying plate 4 to prevent the drying plate 4 from bulging; the connection between any drying plate 4 and the outer wall of the rotating shaft is an arc-shaped chamfer 44 to prevent material deposition. A through hole 431 can be set in the middle of the solid round steel bar 43 to reduce weight.

[0052] A feed hopper is provided at the front end of the shell, and a feed port 11 is the upper inlet of the feed hopper. The lower opening of the feed hopper is located above the front end of the corresponding rotating shaft 2. The material entering the inner cavity of the shell from the feed port 11 is pushed by the push plate 41 to move to the discharge port. The discharge port can be set on the bottom surface of the shell at the other end of the shell away from the feed hopper, and of course, it can also be set on the end surface of the shell. A shell opening is also provided on the end surface of the shell located below the connection of the rotating shaft 2 on one side of the feed hopper to facilitate the cleaning of the inner cavity of the shell, and a closed door that can open and close the corresponding shell opening is sealed on the shell opening. The specific transmission structure of the rotating shaft drive motor 21 and the corresponding rotating shaft 2 and the specific structure of the rotating shaft 2 and the corresponding shell 1 are well-known technologies, so they will not be described in detail. Similarly, the specific structure of the rotating shaft 3 and the corresponding shell 1 are well-known technologies, so they will not be described in detail. Convex plates 14 can also be arranged at intervals on the top of the inner cavity of the shell, and the drying disc body 4 extends into the gap of the corresponding convex plates 13 in sequence.

[0053] Working principle: hot steam enters the inner cavity of the rotating shaft from one end of the rotating shaft, and then enters the inner cavity of the drying disk from the side wall air inlet on the inner wall of the rotating shaft. After drying the material, the steam cools down or condenses into liquid, enters the liquid outlet shell from the side wall liquid outlet, enters the buffer cavity from the liquid outlet, and then enters the liquid outlet cylinder from the cylinder wall opening, and finally leaves the rotating shaft from the air outlet opening of the rotating shaft; hot steam enters the inner cavity of the feed shaft from one end of the feed shaft, and leaves the feed shaft from the other end of the feed shaft after drying the material.

[0054] The material entering the inner cavity of the shell is stirred by the staggered drying discs and pushed toward the discharge port by the pusher plates on the side walls of the drying discs. Hot steam passes through the drying discs and the rotating shaft to dry the material.

[0055] During the rotation of the two rotating shafts, some materials will accumulate in the bottom of the shell cavity between the lower part of the feeding part between the two rotating shafts and the bottom surface of the inner wall of the shell. Therefore, a rotating shaft is added to the bottom of the shell cavity. The shovel blade of the rotating shaft scoops up the materials accumulated at the bottom of the shell cavity and piles them into the shell cavity to avoid the accumulation of materials in the material accumulation recess. A hollow structure can also be adopted in the rotating shaft cavity to dry the materials by passing hot steam.

[0056] like Fig. 22 and Fig.23 As shown, the second embodiment of the combined dryer for drying fish meal and meat and bone meal, the specific structure of the second drying section is the same as the structure of the second drying section in the first embodiment, and the stirring section in the first drying section adopts a hollow screw structure 301 with screw ridges on the outer surface, and the two ends of the screw structure 301 are sealed and connected to the corresponding positions of the housing 1. The specific structure of the connection between the screw structure 301 and the housing 1 belongs to the known technology, so it will not be described in detail. The end of the screw structure 301 is driven by the third drive motor 37, and the transmission connection structure between the screw structure 301 and the third drive motor 37 also belongs to the known technology, so it will not be described in detail.

Claims

1. A combined dryer for drying fish meal and meat and bone meal, comprising a first drying section capable of drying fish paste and meat and bone paste into powder, characterized in that: The combined dryer further comprises a second drying section capable of drying and screening the powder, the second drying section comprising a closed shell (6) for drying the powder, a feeder (7) for feeding the powder into the inner cavity (61) of the closed shell (6), a steam heating device (8) for heating the powder, a material agitator (9) for forming a steam vortex in the inner cavity (61) of the closed shell (6), and a collecting device (10) for collecting the dried powder, the stirring portion of the material agitator (9) being located in the inner cavity (61), the steam delivery port of the steam heating device (8) being connected to the air inlet of the closed shell (6), the feed port of the feeder (7) being connected to the powder outlet of the first drying section, the feed port of the feeder (7) being connected to the feed port of the closed shell (6), the collection port of the collecting device (10) being connected to the discharge port of the closed shell (6), and the The stirring part is located at the lower part of the inner cavity (61), and a classifier capable of cutting materials and screening and passing small particle materials is arranged at the upper part of the inner cavity (61), and the classifier is connected to the classifier motor (62) via a transmission rod (63) passing through the closed shell (6); the classifier comprises a transmission rod (63), a swirl plate (64), a first blade group (65), a grading disk (66) and a second blade group (67), and the swirl plate (64), the first blade group (65), the grading disk (66) and the second blade group (67) are sequentially connected to the transmission rod (63) from bottom to top, and screening holes capable of screening and passing small particle materials are distributed on the grading disk (66); the first blade group (65) and the second blade group (67) are both spiral blade groups; and a second swirl plate (68) is arranged on the transmission rod (63) between the grading disk (66) and the first blade group (65).

2. The combined dryer according to claim 1, characterized in that: The collecting device (10) comprises a separator (101), a bag-type dust collector (102) and an induced draft fan (103); the inner cavity of the separator (101) is connected to the discharge port of the closed shell (6) via a pipeline; a discharge valve (104) is provided on the discharge port of the separator (101); the inner cavity of the separator (101) is connected to the dust removal chamber of the bag-type dust collector (102) via a pipeline; the dust removal chamber of the bag-type dust collector (102) is connected to the air suction port of the induced draft fan (103); and the discharge valve (104) is a fan-closing valve.

3. The combined dryer according to claim 1, characterized in that: The feeder (7) comprises a feeding pipe and a conveying pipe (72); a feeding hopper (71) is arranged on the feeding port of the feeding pipe; the discharge port of the feeding pipe is communicated with the feeding port of the closed shell (6); the feeding hopper (71) is communicated with the outlet of the conveying pipe (72); the inlet of the conveying pipe (72) is communicated with the powder outlet (13) of the first drying section; a screw conveying shaft is arranged in the conveying pipe (72); the screw conveying shaft is connected to a screw conveying shaft motor (73) by transmission.

4. The combined dryer according to claim 1, characterized in that: The steam heating device (8) comprises a blower (82) and a steam heater (81), the steam delivery port of the steam heater (81) being connected to the air inlet of the closed shell (6), and the steam input port of the steam heater (81) being connected to the air supply port of the blower (82).

5. The combined dryer according to claim 1, characterized in that: The material agitator (9) comprises a stirring mechanism (91) and a stirring motor (92); the stirring mechanism (91) is a spiral blade group, the spiral blade group is located at the lower part of the inner cavity, and the bottom of the spiral blade group extends out of the closed shell (6) and is transmission-connected to the stirring motor (92).

6. The combined dryer according to any one of claims 1 to 5, characterized in that: The first drying section comprises a shell (1), wherein a feed inlet (11) for inputting a material to be dried is arranged at the upper part of one end of the shell (1), and a powder outlet (13) for outputting the dried material is arranged at the other end of the shell (1). A feeding section capable of drying the material and pushing the material toward the powder outlet (13) is arranged in the inner cavity of the shell, wherein one end of the feeding section is sealed and rotatably connected to the corresponding shell (1), and the other end of the feeding section is sealed and passes through the corresponding shell (1) and is connected to the driving mechanism. The feeding section comprises two rotating shafts (2) horizontally inserted in the inner cavity of the shell and capable of rotating independently, and a stirring shaft (2) is axially arranged at the bottom of the inner cavity of the shell below the feeding section. The stirring part comprises a rotating shaft (3) and a shovel blade (31) capable of shoveling materials deposited on the bottom of the inner cavity of the shell, the shovel blade (31) being distributed on the outer circumference of the rotating shaft (3), one end of the rotating shaft (3) being sealed and rotatably connected to the corresponding shell (1), the other end of the rotating shaft (3) passing through the corresponding shell (1) in a sealed manner and being connected to a second driving mechanism, the second driving mechanism comprising an intermittent driving mechanism capable of driving the rotating shaft (3) to rotate intermittently and a second driving motor (32), one end of the intermittent driving mechanism being transmission-connected to the second driving motor (32), and the other end of the intermittent driving mechanism being connected to the rotating shaft (3).

7. The combined dryer according to claim 6, characterized in that: The intermittent drive mechanism comprises a transmission gear (34) meshing with a gear (33) at the end of a rotating shaft (3), an intermittent drive disc (35) concentrically connected to the transmission gear (34), and a transmission disc (36); the transmission disc (36) is transmission-connected to a drive shaft of a second drive motor (32); a transmission disc drive rod (361) is arranged on the transmission disc (36); notches (351) capable of snapping into the transmission disc drive rod (361) are evenly distributed on the intermittent drive disc (35); the intermittent drive disc (35) and the transmission disc (36) are arranged together so as to be relatively rotatable; when the transmission disc drive rod (361) snaps into the notch (351), the transmission disc (36) drives the intermittent drive disc (35) to rotate.

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