CN107232629A - A kind of feed dryer - Google Patents

Abstract

The invention relates to the field of feed processing. A feed dryer includes a box body and a feed conveying mechanism arranged inside the box body; The conveying direction of the conveying mechanism is divided into multiple drying chambers, and each drying chamber is equipped with a drying unit; the drying unit includes a heat exchange box inside the drying chamber, and is connected to the input end of the heat exchange box. The steam channel and the condensed water pipe connected to the output end of the heat exchange box; the upper end of the box is connected to a moisture exhaust tube through a moisture exhaust pipeline, a fan assembly is arranged inside the moisture exhaust cylinder, and a moisture exhaust tube is installed above the moisture exhaust cylinder. There is a filter plate in the moisture drainage tube between the tide outlet and the connection end of the moisture drainage pipe. In this feed dryer, the feed is carried through multiple drying chambers through the feed conveying mechanism, and it can be dried multiple times at low temperature. On the basis of ensuring drying, on the one hand, it can prevent high temperature from causing the loss of nutrients in raw materials, and on the other hand, it can improve drying efficiency.

Description

feed dryer

technical field

The invention relates to the field of feed processing, in particular to a feed dryer.

Background technique

In feed production and processing, it is often necessary to dry a variety of plant or animal raw materials for further processing. Most of the drying equipment currently used is directly dried at high temperature in a fixed area. Although the purpose of drying raw materials can be effectively achieved in a short time, it is easy to cause deterioration or denaturation of raw materials caused by high drying temperature during high-temperature drying, resulting in serious nutrient content in raw materials. The loss or failure of functional ingredients will eventually lead to low feed efficiency or even completely unable to meet the needs of use. At the same time, most of the existing feed dryers are heated by stirring inside a single heating chamber, the single drying volume is not high, and the drying efficiency is low.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a feed dryer, in which the feed is carried through multiple drying chambers through the feed conveying mechanism, and can be dried multiple times at low temperature, while ensuring the drying Basically, on the one hand, it prevents the loss of nutrients in the raw materials caused by high temperature, and on the other hand, it improves the drying efficiency.

In order to achieve the above object, the present invention adopts the following technical solutions:

A feed dryer, characterized in that: it includes a box body, and a feed delivery mechanism arranged inside the box body; the two ends of the box body are respectively provided with a material inlet and a material outlet, and the box body is arranged along the side of the feed delivery mechanism. The conveying direction is divided into multiple drying chambers, and each drying chamber is equipped with a drying unit; the drying unit includes a heat exchange box inside the drying chamber, and a steam channel connected to the input end of the heat exchange box , and a condensed water pipe connected to the output end of the heat exchange box; the upper end of the box is connected to a moisture exhaust tube through a moisture exhaust pipeline, and a fan assembly is arranged inside the moisture exhaust tube, and a moisture exhaust port is arranged above the moisture exhaust tube. There is a filter plate in the moisture discharge cylinder between the tide port and the connection end of the moisture discharge pipe; the moisture discharge cylinder is an inverted cone-shaped cylinder body, and a fan cover is provided at the lower end of the cylinder body, and the fan cover is an inverted cone shape The maximum diameter of the fan cover is greater than the diameter of the lower end of the moisture exhaust tube; the fan assembly includes fan blades inside the fan cover and a motor that drives the fan blades to rotate.

Preferably, the steam passage includes a steam main pipe and several steam branch pipes, the steam main pipe is arranged outside the box and parallel to the conveying direction of the feed delivery mechanism, and the inner ends of the several steam branch pipes are respectively connected to The heat exchange box is sealed and connected, and the outer end of each steam branch pipe is sealed and connected with the steam main pipe; the steam branch pipe upstream of the heat exchange box is provided with a steam valve.

Preferably, the feed conveying mechanism includes a circular feeding belt, and a conveying motor that drives the circular feeding belt; The feeding area is formed between the baffles.

As a preference, the moisture-discharging pipeline includes a main moisture-discharging pipeline and several branched moisture-discharging pipelines. The inner ends are respectively sealed and connected with multiple drying chambers, and the outer ends of each moisture-discharging branch pipeline are sealed and connected with the main moisture-discharging pipeline.

The present invention adopts the above-mentioned technical solution, which relates to a feed dryer. The box body of the feed dryer is divided into multiple drying chambers along the delivery direction of the feed delivery mechanism. When in use, the feed delivery mechanism carries the feed through many There are two drying chambers, which can be dried multiple times at a low temperature of 80°C to prevent the loss of nutrients in raw materials caused by high temperatures on the basis of ensuring drying. At the same time, the moisture drainage pipe can draw out the moisture discharged from the feed carried by the air inside the drying chamber to ensure that the inside of the drying chamber is dry and the drying effect is better. Therefore, the feed conveying mechanism in the feed dryer carries feed through multiple drying chambers, and can be dried multiple times at low temperature. On the basis of ensuring drying, on the one hand, it can prevent high temperature from causing the loss of nutrients in raw materials, and on the other hand, it can Improve drying efficiency.

Description of drawings

Figure 1 is a schematic structural diagram of a feed processing line.

Fig. 2 is the structural representation of fish paste rolling machine.

Fig. 3 is a structural schematic diagram of a raw material mixer.

Fig. 4 is a schematic structural diagram of a stirring rod in a raw material mixer.

Figure 5 is a schematic structural view of the feed extrusion molding machine.

Fig. 6 is a schematic diagram of the pushing chamber area of the feed extrusion molding machine.

Fig. 7 is a schematic diagram of the extrusion cavity area of the feed extrusion molding machine.

Fig. 8 is a schematic structural view of the feed throwing molding machine.

Fig. 9 is a schematic diagram of the installation of the plugging device in the feed throwing molding machine.

Fig. 10 is a schematic structural view of the feed dryer.

detailed description

The preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

A feed processing line as shown in Figures 1 to 10 includes a fish paste rolling machine 1, a raw material mixer 2, a feed extrusion molding machine 3, a feed throwing molding machine 4 and a feed drying machine successively arranged through a conveyor belt 9. The drying machine 5 connects the above-mentioned mechanisms in series through the transmission belt 9 so as to realize the assembly line type feed processing, which greatly improves the processing efficiency and reduces the labor intensity. Among the above equipment, fish paste rolling machine 1 and raw material mixer 2 are combined to form a raw material processing line; feed extrusion molding machine 3, feed throwing molding machine 4 and feed dryer 5 are combined to form a feed molding line.

The fish paste rolling machine 1 includes a first frame 11 , a rolling mechanism and a scraper 17 arranged on the first frame 11 . The first frame 11 is a U-shaped frame, and the rolling mechanism includes the first roller 12, the second roller 13 and the third roller 14 that can stick to the fish paste on the circumferential side, and the first roller 12 , the second roller 13 and the third roller 14 are rotated sequentially and arranged on the first frame 11, the first roller 12, the second roller 13 and the third roller 14 are all in the U shape of the first frame 11 Opening inside. The rotation direction of the first roller 12 and the third roller 14 on the two sides of the second roller 13 is opposite; specifically, the first roller 12 and the third roller 14 rotate clockwise, and the second roller 13 Turn counterclockwise.

The shaft ends of the second roller 13 and the third roller 14 are movable and arranged on the first frame 11; specifically, the U-shaped side walls of the first frame 11 are provided with moving pairs, The moving pair includes a moving plate 151 disposed on the inner wall of the U-shaped opening, a threaded rod 152 penetrating inside the first frame 11 , and a handle 153 for driving the threaded rod 152 to rotate. The inner end surface of the moving plate 151 is provided with a bump, and the bump is sleeved on the screw rod 152 and threadedly engaged with the screw rod 152, and the shaft ends of the second roller 13 and the third roller 14 are positioned on the moving plate 151 . The rolling mouth is formed between the second roller 13 and the first roller 12 and the third roller 14 on both sides thereof; A baffle 16 is also provided between the shaft ends, and the baffle 16 can be adjusted longitudinally along the first frame 11 . The baffle plate 16 is a triangular baffle plate, and the two ribs on the lower side of the baffle plate 16 are respectively matched with the circumferential outer surfaces of the first roller 12 , the second roller 13 or the third roller 14 . When adjusting the machine, the worker can rotate the handle 153, and the handle 153 drives the screw mandrel 152 to rotate, thereby realizing the movement of the moving plate 151 and the second roller 13 and the third roller 14 on it, and finally realizing the adjustment of the first roller 12 and the third roller 14. The size of the rolling mouth between the two rollers 13, the size of the rolling mouth can be adjusted according to the size of the frozen fish adopted, and can also be adjusted according to the fineness of the fish paste required. The gap between the second roller 13 and the first roller 12 and the third roller 14 on both sides of the second roller 13 can be set to prevent the gap between the two rollers from becoming smaller due to resonance during mechanical operation. .

The scraper plate 17 is hinged on the first frame 11, and the scraper plate 17 can be rotated and adjusted along its hinged end and then fixed. , the rolling direction of the third roller 14 is towards the upper scraping port of the scraper 17 . When the second roller 13 and the third roller 14 are adjusted, the scraper 17 can also be rotated and adjusted along its hinged end, so that the upper end of the scraper 17 is always attached to the third roller 14 to realize scraping. material.

Through the above technical scheme, the rolling mechanism in the fish paste rolling machine 1 includes the first roller 12, the second roller 13 and the third roller 14 that can stick the fish paste on the circumferential side, and the second roller 13 and the shaft ends of the third roller 14 are moved and arranged on the first frame 11, so that the gap between the first roller 12 and the second roller 13 can be adjusted. Between the effect of rolling and the fluency of rolling It can be adjusted to make the rolling gap more suitable. During use, the first roller 12 and the second roller 13, as well as the second roller 13 and the third roller 14 are all rolled in opposite directions, the rolling effect is better, and the fish paste obtained is more delicate. During use, the fish material (generally frozen fish) is manually thrown between the first roller 12 and the second roller 13 of the rolling mechanism, and the first roller 12 and the second roller 13 are crushed for the first time. Press to crush the frozen fish, then roll it into fish paste by rolling between the second roller 13 and the third roller 14, and then scrape it down to the conveyor belt going to the raw material mixer 2 through the scraper 17 .

The top of the raw material mixer 2 is provided with a feed box 8 for inputting artificial additives to the raw material mixer 2; the raw material mixer 2 includes a second frame 21, and a stirring box 22 arranged on the second frame 21, and The stirring assembly arranged in the second frame 21. The middle part of the mixing box 22 is hinged on the second frame 21; specifically, the second frame 21 is provided with a hollow protrusion, the outer side of the hollow protrusion is covered with an outer bearing, and the inside of the hollow protrusion is provided with an inner bearing. Bearing, the stirring box 22 is connected on the said outer bearing. A locking assembly that restricts the movement of the stirring box 22 is provided between the stirring box 22 and the second frame 21. The locking assembly includes a lock seat 271 fixed on the second frame 21, and a lock set on the lock seat. pin 272. The mixing box 22 is provided with a lock hole, and the lock pin 272 can extend into the lock hole and fix the mixing box 22 and the second frame 21 .

The stirring assembly includes a stirring rod inside the stirring box 22 and a stirring motor that drives the stirring rod to rotate. The stirring rod includes a main shaft 281 and a plurality of stirring positions arranged on the side of the main shaft 281 . Both ends of the main shaft 281 pass through the joint between the mixing box 22 and the second frame 21 , that is, the two ends of the main shaft 281 pass through the inner bearing. There are two stirring positions on the main shaft 281 , and the two stirring positions are located on both axial sides of the center of the main shaft 281 . Stirring part comprises the first support rod 282 that is vertically connected on the center of main shaft 281, and the second support rod 283 that is connected on the end of main shaft 281, and two ends are respectively connected with first support rod 282 middle part, second support rod 283 The first curved rod 284 connected in the middle, and the second curved rod 285 respectively connected to the outer end of the first strut 282 and the outer end of the second strut 283 at both ends. The first strut 282 and the second strut 283 are located on two radial planes of the main shaft 281 respectively, preferably the radial plane where the first strut 282 is located and the radial plane where the second strut 283 is located are perpendicular to each other , and the radial planes where the first struts 282 of the two stirring positions overlap.

With the above technical solution, the stirring rod in the raw material mixer 2 includes a main shaft 281 and a plurality of stirring positions arranged on the side of the main shaft 281 . Wherein, the stirring part includes a first strut 282 and a second strut 283 connected to the main shaft 281, and a first curved rod 284 and a second curved rod 285 connected to the first strut 282 and the second strut 283, Through the hollowed-out stirring part composed of the first support rod 282, the second support rod 283, the first curved rod 284 and the second curved rod 285, the raw materials can be fully flowed during stirring, and the fish paste and artificial additives are fully mixed, Blends better. When this raw material mixer 2 was in use, the fish paste obtained by the fish paste rolling machine 1 was sent into the mixing box 22 by the conveyor belt earlier, and then the artificial additive was added in the material addition box 8, and the addition material box 8 obtained the quantitative artificial additive. The stirring box 22 is sent into; then the stirring rod works until the stirring work is completed. Finally, the locking assembly is released to rotate the mixing box 22 and the raw materials inside it are dumped on the conveyor belt going to the feed extruding machine 3 .

The feed extrusion molding machine 3 includes a third frame 31 , a feeding box 32 arranged on the third frame 31 , and a pushing and extruding mechanism arranged inside the third frame 31 . The upper material box 32 includes a side wall 321 and an inclined bottom plate 322 . The lower end of the box side wall 321 is integrally connected to the third frame 31 , and the upper end of the box side wall 321 forms a material feeding port. The upper end of the inclined bottom plate 322 is connected to the inner side wall of the box side wall 321 . The inside of the third frame 31 is provided with a pushing cavity 33, and an extrusion molding cavity 34 communicated with the pushing cavity 33, and the lower end of the inclined bottom plate 322 and the side wall 321 of the box form a connection with the pushing cavity. 33 connected feed port passages. The feeding box 32 is above the pushing chamber 33, and a circular mesh plate 35 is fixed on the third frame 31 outside the extrusion molding chamber 34, and the circular mesh plate 35 includes two semicircular The mesh plate 35 is formed by splicing.

The pushing and extruding mechanism includes a rotating shaft passing through the pushing chamber 33 and the extrusion molding chamber 34, preferably two mutually balanced rotating shafts, and the rotating directions of the two rotating shafts are opposite. A spiral pusher plate 36 is provided on the circumferential side of the rotating shaft in the pushing cavity 33 , and a semi-arc extruding plate is provided on the circumferential side of the rotating shaft in the extrusion molding cavity 34 . A first extruding plate 37 in the middle and a second extruding plate 38 arranged on both axial sides of the first extruding plate 37 are arranged on the peripheral side of the rotating shaft of the extruding cavity 34 . The outer extrusion surfaces of the first extrusion plate 37 and the second extrusion plate 38 are on the same circumferential line, and the two side surfaces of the first extrusion plate 37 and the second extrusion plate 38 are in different radial areas. In this technical solution, the first extruding plate 37 and the second extruding plate 38 are in different radial regions, which means that the directions corresponding to the radial outward direction of the first extruding plate 37 and the second extruding plate 38 are different. Under this premise, the semi-arc-shaped first extruding plate 37 and the second extruding plate 38 are mutually staggered, and can be pushed into the extrusion molding cavity 34 under the push of the screw pusher plate 36, through the first The extruded plate 37 and the second extruded plates 38 on both sides in the axial direction (that is, the three extruded plates) are extruded at the same time to improve the extrusion molding efficiency.

With the above-mentioned technical scheme, the third frame 31 of the extrusion molding machine is provided with a pushing chamber 33 and an extrusion molding chamber 34, the rotating shaft runs through the pushing chamber 33 and the extrusion molding chamber 34, and the circumference of the rotating shaft in the pushing chamber 33 A screw pusher plate 36 is provided on the side, and the material is fed from the pusher cavity 33 to the extrusion molding cavity 34 by the screw pusher plate 36; The pressing plate can press the raw material to the circular mesh plate 35 through the extruding plate, and then because the extruding plate is a rotating semi-arc plate, it will automatically cut off the raw material after rotating a small path, thus forming granular feed . The scheme realizes the functions of pushing material and extruding and cutting through the rotation of the same rotating shaft, and uses the semi-arc extruding plate to rotate and extrude to realize automatic cutting, thereby simplifying the structure and improving the processing efficiency. When the extrusion molding machine is in use, the raw materials obtained in the raw material mixer 2 are conveyed to the feeding box 32 through the conveyor belt, and finally fall into the pushing chamber 33, and then the rotating shaft rotates, and the spiral pushing plate 36 on the rotating shaft The material is fed from the pushing cavity 33 to the extrusion molding cavity 34, and the extrusion plate can press the raw material to the circular mesh plate 35 and automatically cut off the raw material, thereby forming granular feed and falling into the feed throwing molding machine 4. on the conveyor belt.

The feed throwing forming machine 4 includes a base 41, a circular throwing cylinder 42 arranged on the base 41, and a circular turntable on the lower end surface of the circular throwing cylinder 42. The inside of the base 41 is provided with a driving circle. The drive unit that rotates the turntable. The circular throwing barrel 42 includes a cylinder body 421 and a cover body, and the cover body includes a fixed cover 422 and a movable cover 423. The fixed cover 422 is fixed on the upper end opening of the cylinder body 421, and leaves a gap in the upper end opening of the cylinder body 421. Scalloped opening. The movable cover 423 is a fan-shaped structure conforming to the shape of the fan-shaped opening, and the upper end surface of the movable cover 423 is provided with a handle. The inner side of the box body of the circular throwing barrel 42 is provided with a discharge channel and a blocking device for blocking the discharge channel. The discharge channel includes a horizontal channel 441 whose inner end communicates with the inside of the circular throwing cylinder 42 , and an inclined channel 442 which communicates with the horizontal channel 441 . The blocking device includes a blocking cylinder 45 connected to the outer end of the horizontal channel 441 , and a blocking component 46 arranged on the output end of the blocking cylinder 45 . The blocking cylinder 45 drives the blocking component 46 to move in the horizontal channel 441 . When the blocking cylinder 45 is at the maximum output position, the blocking member 46 is on the inner opening of the horizontal channel 441 . When the blocking cylinder 45 is at the minimum output position, the blocking member 46 is located outside the connection between the inclined passage 442 and the horizontal passage 441 .

The inner opening of the horizontal passage 441 is a conical opening 443 , and a retaining ring 47 is provided along the edge of the conical opening 443 . The blocking member 46 includes a main body, and several first petals 461 and several second petals 462 that are movably arranged on the main body, and the outer surfaces of the first petals 461 and the second petals 462 are both Fit the inclined surface of the tapered mouth 443 . The main body includes a circular plate body 463 and a truncated cone 464 fixed on the outer end surface of the circular plate body 463 , the diameter of the inner end surface of the truncated cone 464 is larger than the diameter of the outer end surface. The inner end of the frustum 464 is radially provided with a track bar 465, the first petal body 461 is connected to the track bar 465 and can move along the track bar 465, and the first petal body 461 and the frustum 464 are provided with a track bar 465. Stage clip 466 is arranged. The outer conical surface of the frustum 464 is provided with a slide rail 467, the second petal body 462 is moved and arranged in the slide rail 467, and the outer end of the second petal body 462 is hinged to the end of the sealing cylinder 45 through a connecting rod. on the output shaft. When the blocking cylinder 45 is at the maximum output position, the first petal body 461 and the second petal body 462 are arranged at intervals to form a composite ring, the peripheral diameter of the composite ring is larger than the peripheral diameter of the circular plate body 463, and closes The tapered mouth 443 is described. In this technical solution, the first petal body 461 and the second petal body 462 in the blocking member 46 can move relative to the main body, and when the output position of the blocking cylinder 45 is reduced, the second petal body 462 is first driven to move outwards. The second petal body 462 shrinks inward with the hinged end as the center; when the second petal body 462 moves to the end of the slide rail 467, it drives the main body and the first petal body 461 on it to move outward, and the first petal body 461 moves outward during the movement process. Petal body 461 compresses compression spring 466 under the effect of tapered mouth 443, thereby makes the whole outer diameter of blocking member 46 shrink, can enter in the horizontal channel 441; The blocking part 46 moves inward as a whole until the circular plate body 463 resists the retaining ring 47, then the second petal body 462 moves along the slide rail 467, and the second petal body 462 is stretched; at the same time, under the action of the compression spring 466, The first petal body 461 is stretched, and the first petal body 461 and the second petal body 462 form a combined ring to close the tapered opening 443 . In this scheme, the deformation of the sealing member 46 ensures that the tapered mouth 443 can be completely blocked to prevent the material from entering; and when the output station of the sealing cylinder 45 is reduced, the sealing member 46 can be ensured to enter the horizontal channel 441 .

In the above-mentioned feed throwing molding machine 4, a circular turntable is provided on the lower end surface of the circular throwing cylinder 42, and a discharge channel is provided on the inner side of the casing of the circular throwing cylinder 42, and a valve for blocking the discharge passage is provided. Blocking device. When it is necessary to throw the feed, put the feed into the circular throwing barrel 42, the circular turntable rotates at a high speed to drive the feed, and the centrifugal throwing makes the surface of the granular feed regular; after the feed is formed, the blocking device can be opened, and the round During the rotation process of the turntable (it can be stopped and rotated by inertia), the feed is thrown out of the discharge channel, so that it can realize fast feeding, eliminating the need to wait for the process of dumping after stopping, improving the feeding efficiency and reducing manual work strength.

The feed dryer 5 includes a box body 51 and a feed conveying mechanism arranged inside the box body 51 . The two ends of the box body 51 are respectively provided with a material inlet 52 and a material outlet 53, and the box body 51 is divided into a plurality of drying chambers along the conveying direction of the feed conveying mechanism, and each drying chamber is equipped with a drying unit . The feed conveying mechanism includes an endless feeding belt 541 and a conveying motor that drives the endless feeding belt 541 to run. The belt body of the circulating feeding belt 541 is sequentially provided with a plurality of feeding baffles along the conveying direction, and a feeding area is formed between two adjacent feeding baffles. The drying unit includes a heat exchange box 551 inside the drying chamber, a steam channel communicating with the input end of the heat exchange box 551 , and a condensate water pipe 552 communicating with the output end of the heat exchange box 551 . The steam channel includes a steam main pipe 553 and several steam branch pipes 554. The steam main pipe 553 is arranged on the outside of the box body 51 and is parallel to the conveying direction of the feed delivery mechanism. The inner ends of several steam branch pipes 554 The outer ends of each steam branch pipe 554 are sealed with the main steam pipe 553 respectively. A steam valve is provided on the steam branch pipeline 554 upstream of the heat exchange box 551 .

The upper end of the box body 51 is connected with a moisture exhaust tube 56 through a moisture exhaust pipeline, the moisture exhaust pipeline includes a moisture exhaust main pipeline 571 and several moisture exhaust branch pipelines 572, and the moisture exhaust main pipeline 571 is arranged on the outside of the box body 51 and is connected to the The conveying direction of the feed conveying mechanism is parallel, and the inner ends of several tide-discharging branch pipelines 572 are respectively sealed and connected with multiple drying chambers, and the outer ends of each tide-discharging branch pipeline 572 are sealed and connected with the main moisture-discharging pipeline 571 . The inside of the moisture exhaust tube 56 is provided with a fan assembly, the top of the moisture exhaust tube 56 is provided with a moisture outlet 561 , and a filter plate 562 is provided in the moisture exhaust tube 56 between the moisture outlet 561 and the connecting end of the moisture exhaust pipe. The moisture exhaust tube 56 is an inverted cone cylinder, and the lower end of the cylinder is provided with a fan cover 563. The fan cover 563 is an inverted cone cover body, and the maximum diameter of the fan cover 563 is larger than that of the lower end of the moisture exhaust tube. diameter. The fan assembly includes fan blades 581 inside the fan cover 563 and a motor that drives the fan blades to rotate.

In this technical solution, the box body 51 of the feed dryer 5 is divided into multiple drying chambers along the conveying direction of the feed conveying mechanism. Drying, on the basis of ensuring drying, prevents high temperature from causing the loss of nutrients in raw materials. At the same time, the moisture drainage pipe can extract the moisture discharged from the feed carried by the air inside the drying chamber, so as to ensure that the inside of the drying chamber is dry and the drying effect is better. Therefore, in the feed dryer 5, the feed is carried through multiple drying chambers through the feed conveying mechanism, and it can be dried multiple times at low temperature. On the basis of ensuring drying, on the one hand, it can prevent the high temperature from causing the loss of nutrients in the raw materials; On the one hand, the drying efficiency is improved.

Claims (4)

1. A feed dryer, characterized in that: it includes a box body, and a feed conveying mechanism arranged inside the box body; the two ends of the box body are respectively provided with an inlet and an outlet port, and the box body is conveyed along the feed The conveying direction of the mechanism is divided into multiple drying chambers, and each drying chamber is equipped with a drying unit; the drying unit includes a heat exchange box inside the drying chamber, and a The steam channel and the condensed water pipe connected to the output end of the heat exchange box; the upper end of the box is connected to a moisture exhaust tube through a moisture exhaust tube, and a fan assembly is arranged inside the moisture exhaust tube, and a moisture exhaust port is arranged above the moisture exhaust tube , a filter plate is provided in the moisture discharge cylinder between the tide discharge outlet and the connection end of the moisture discharge pipe; Conical cover body, the maximum diameter of the fan cover is larger than the diameter of the lower end of the moisture exhaust tube; the fan assembly includes fan blades inside the fan cover and a motor that drives the fan blades to rotate. 2. A feed dryer according to claim 1, characterized in that: the steam passage includes a main steam pipe and several branch steam pipes, the main steam pipe is arranged outside the box and connected to the feed conveying mechanism The conveying direction is parallel to each other, the inner ends of several steam branch pipes are sealed and connected with the heat exchange box respectively, and the outer ends of each steam branch pipe are sealed and connected with the main steam pipe; the steam branch pipe upstream of the heat exchange box There is a steam valve on it. 3. A feed dryer according to claim 1, characterized in that: the feed conveying mechanism includes a loop feeding belt, and a conveying motor that drives the loop feeding belt to run; the belt body of the loop feeding belt A plurality of feeding baffles are sequentially arranged along the conveying direction, and a feeding area is formed between two adjacent feeding baffles. 4. A feed dryer according to claim 1, characterized in that: the moisture-discharging pipeline includes a main moisture-discharging pipeline and several branched moisture-discharging pipelines, and the main moisture-discharging pipeline is arranged on the outside of the box and connected to the The conveying direction of the above-mentioned feed conveying mechanism is parallel, the inner ends of several tide-discharging branch pipelines are respectively sealed and connected with multiple drying chambers, and the outer ends of each tide-discharging branch pipeline are sealed and connected with the main moisture-discharging pipeline.