A device for preparing coal water slurry additive

Abstract

The present invention relates to the field of water-coal slurry additives, and specifically to a water-coal slurry additive preparation device, comprising a screening and drying device and a casing, wherein the screening and drying device is provided with three groups, the three groups of screening and drying devices are arranged in a linear array and are connected in pairs, the three groups of screening and drying devices are all located inside the casing and are connected to the inner wall of the casing, the screening and drying device comprises a grinding assembly: and also comprises: a screening assembly connected to the grinding assembly, the present invention utilizes a crank slider mechanism to make the three groups of screens shake rapidly, thereby repeatedly screening the materials crushed by the grinding assembly, and at the same time, in the screening process, a hot air inlet fan and an exhaust fan are utilized to complete the hot air exchange of the materials, thereby screening and drying the materials, so as to solve the problem that the existing water-coal slurry additive preparation equipment requires the cooperation of multiple devices and has low preparation efficiency.

Description

Technical Field

[0001] The invention relates to the field of coal-water slurry additives, and in particular to a device for preparing coal-water slurry additives. Background Art

[0002] Coal water slurry additives, according to their different functions, include dispersants, stabilizers and other auxiliary chemical agents, such as defoamers, pH adjusters, enzyme inhibitors, surface modifiers and promoters. Among them, the drying process in the preparation process of coal water slurry additives is related to its later storage quality. The existing coal water slurry additive drying equipment generally adopts airflow drying, which uses manual stacking and then hot air drying;

[0003] Since hot air is passed through the pile for air drying, the stacked materials are full of water. During air drying, part of the water inside will be gathered, so that the water-coal slurry additive will be gathered, which will reduce the drying efficiency and affect the storage quality in the later stage. At the same time, when the piled materials are dried, the internal drying will be uneven, over-drying will occur, and the processing quality will be affected;

[0004] At the same time, during the processing, the water-coal slurry additive needs to be ground, and suitable materials are screened out during the grinding process. If the screened materials are not dried quickly, water will accumulate inside them, resulting in a large amount of material accumulation, which is not convenient for screening and drying the materials. Traditional preparation equipment requires multiple devices to complete the processing of materials in steps, thereby accelerating the accumulation of water inside the materials and reducing the preparation efficiency;

[0005] Therefore, it is necessary to invent a device for preparing a water-coal slurry additive. Summary of the invention

[0006] To this end, the present invention provides a water-coal slurry additive preparation device, which utilizes a crank slider mechanism to make three groups of screens shake rapidly, thereby repeatedly screening the material crushed by the grinding component. At the same time, during the screening process, a hot air inlet fan and an exhaust fan are used to complete the hot air exchange of the material, thereby screening and drying the material, so as to solve the problem that the existing water-coal slurry additive preparation equipment requires the cooperation of multiple devices and has low preparation efficiency.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a water-coal slurry additive preparation device, comprising a screening and drying device and a casing, wherein the screening and drying device is provided with three groups, the three groups of the screening and drying devices are arranged in a linear array and connected in pairs, the three groups of the screening and drying devices are all located inside the casing and connected to the inner wall of the casing, the screening and drying device comprises a grinding assembly: and further comprises: a screening assembly connected to the grinding assembly;

[0008] The screening component comprises a receiving shell, two adjacent groups of receiving shell end walls are fixedly connected, and the side walls are located on the same plane, the top surface of the receiving shell is inclined, a receiving area is provided in the middle of the receiving shell, both sides of the top of the receiving area are provided with movable grooves, and the bottoms of the two groups of movable grooves are provided with two groups of symmetrical receiving grooves, both sides of the front end of the receiving shell are provided with square slots, and four groups of L-shaped plates and hollow sleeves are fixedly installed at the bottom of the receiving shell, and the four groups of L-shaped plates and hollow sleeves are fixedly installed at the bottom of the receiving shell. The sleeves are respectively located at the four corners of the bottom of the receiving area, the top surfaces of the four groups of L-shaped plates and the bottom of the receiving shell are rotatably connected with crank shafts, the bottoms of the four groups of L-shaped plates are fixedly installed with servo motors, the output shafts of the four groups of servo motors are respectively fixedly connected with the bottoms of the four groups of crank shafts, the middle parts of the four groups of crank shafts are rotatably connected with connecting rods, the inner walls of the four groups of hollow sleeves are slidably connected with pistons, the inner walls of the four groups of pistons are fixedly installed with receiving rods, and the ends of the four groups of connecting rods are rotatably connected with the four groups of receiving rods;

[0009] A screen is provided in the middle of the receiving area, and the two side walls of the screen are respectively slidably connected to the inner walls of the two groups of movable grooves, and two groups of symmetrically arranged receiving blocks are fixedly installed on the bottom of both sides of the screen. The four groups of receiving blocks are respectively slidably connected to the four groups of receiving grooves, and tightening blocks are fixedly installed at the four corners of the bottom of the screen. The two groups of tightening blocks located at the same end are fixedly installed with the same tightening rod, and the two ends of the tightening rod respectively slide through the two groups of hollow sleeves and are fixedly connected to the side walls of the pistons in the two groups of hollow sleeves.

[0010] Preferably, the grinding assembly includes a plug plate, wherein the plug plate is provided with two groups, the outer side walls of the two groups of plug plates are respectively fixedly connected to the inner side walls of the two groups of square slots, three groups of sliding grooves are opened in the middle of the two groups of plug plates, the outer side walls of the two groups of plug plates are slidably connected with sliders through the sliding grooves, and the inner side walls of the two groups of sliders are rotatably connected to the same lower grinding roller. The two side walls of the front end of the receiving shell are fixedly installed with limit plates, and the inner side walls of the two groups of limit plates are fixedly installed with a first cylinder, and the output ends of the two groups of the first cylinders are respectively rotatably connected to the tops of the two groups of sliders, and the inner walls of the two sides of the front end top of the receiving shell are rotatably connected to the same limit roller, and the two ends of the limit roller are fixedly installed with inclined rods, and the bottoms of the two groups of inclined rods are rotatably connected to the same upper grinding roller, and the inner walls of the two sides of the front end top of the receiving shell are rotatably connected to the second cylinder, and the output ends of the two groups of the second cylinders are respectively rotatably connected to the middle parts of the two groups of inclined rods, and the same scraper is fixedly installed in the middle parts of the two groups of inclined rods, and one side of the scraper is tangent to the roller surface of the upper grinding roller.

[0011] Preferably, the three groups of side walls of the receiving shell are fixedly connected to the inner side walls of the casing, a first belt transmission mechanism is fixedly installed on the top inner wall of the casing, a first feed channel and a second feed channel are fixedly installed on the top of the casing, the bottoms of the first feed channel and the second feed channel are both connected to the first belt transmission mechanism, the end of the first belt transmission mechanism is connected to the receiving shell located at the top, two groups of second belt transmission mechanisms are fixedly installed on the bottom inner wall of the casing, and the two groups of the second belt transmission mechanisms have opposite transport directions, a hot air inlet fan is fixedly installed on the front end side wall of the casing, and the hot air inlet fan is connected to the inside of the casing, an exhaust fan is fixedly installed on the top rear end of the casing, and the exhaust fan is connected to the inside of the casing, a discharge trough is provided on the bottom side wall of the rear end of the casing, and the discharge trough is connected to the second belt transmission mechanism located at the end.

[0012] The beneficial effects of the present invention are:

[0013] 1. Add different materials to the first belt transmission mechanism inside the casing through the first feeding channel and the second feeding channel, start the first belt transmission mechanism to transport the materials to the receiving casing at the top, and drive the first cylinder and the second cylinder at the same time under the action of gravity, so that the materials can pass through the gap formed between the upper grinding roller and the lower grinding roller, and at the same time, the upper grinding roller and the lower grinding roller can grind the materials, so that the crushed materials enter the screen. As the upper grinding roller grinds, part of the materials will be adsorbed on the upper grinding roller. At this time, the scraper can scrape the upper grinding roller. The materials on the rollers synchronously drive four servo motors at the same time. The output shaft of the servo motor drives the crankshaft to rotate, so that the crankshaft drives the connecting rod to move, so that the piston in the hollow sleeve follows the connecting rod to reciprocate, thereby driving the fixing rod to reciprocate, and making the screen fixedly connected to the fixing rod shake quickly, so as to achieve the effect of screening the materials. After screening by three screens, qualified materials will pass through the screens and fall onto the second belt transmission mechanism at the front end, and be collected at the bottom of the casing. Unqualified materials will fall onto the second belt transmission mechanism and be discharged from the discharge chute.

[0014] 2. During the screening process, the hot air inlet fan is driven to blow hot air into the casing so that the blown hot air can quickly dry the material inside the casing. At the same time, the vacuum fan is driven to extract the humid air inside the casing, thereby completing the gas replacement and achieving the purpose of quickly drying the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of the device provided by the present invention;

[0016] Figure 2 A schematic diagram of the internal structure of the device provided by the present invention;

[0017] Figure 3A schematic diagram of the structure of the screening and drying device provided by the present invention;

[0018] Figure 4 A disassembled diagram of the screening and drying device provided by the present invention;

[0019] Figure 5 A schematic diagram of the structure of the grinding assembly provided by the present invention;

[0020] Figure 6 A schematic diagram of the structure of the lower grinding roller provided by the present invention;

[0021] Figure 7 A schematic diagram of the structure of the upper grinding roller provided by the present invention;

[0022] Figure 8 A schematic diagram of the structure of the receiving shell provided by the present invention;

[0023] Fig. 9 A bottom view of the screening assembly provided by the present invention;

[0024] Fig.10 A schematic diagram of the structure of the screen provided by the present invention;

[0025] Fig.11 A bottom view of the screen provided by the present invention;

[0026] Fig.12 This is a schematic diagram of the internal structure of the hollow sleeve provided by the present invention.

[0027] In the figure: screening and drying device 100, screening assembly 110, receiving shell 111, receiving area 112, movable slot 113, receiving slot 114, square slot 115, L-shaped plate 116, crank shaft 117, servo motor 118, connecting rod 119, hollow sleeve 120, piston 121, receiving rod 122, screen 123, receiving block 124, fixing block 125, fixing rod 126, grinding assembly 130, plug plate 131, slider 132, lower grinding roller 133, limit plate 134, first cylinder 135, limit roller 136, inclined rod 137, upper grinding roller 138, second cylinder 139, scraper 140, slide 141, casing 200, first belt transmission mechanism 210, second belt transmission mechanism 220, first feed channel 230, second feed channel 240, hot air inlet fan 250, vacuum fan 260, discharge trough 270. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] See attached Figure 1-12The present invention provides a water-coal slurry additive preparation device, comprising a screening and drying device 100 and a casing 200. The screening and drying device 100 is provided with three groups, and the three groups of screening and drying devices 100 are arranged in a linear array and connected in pairs. The three groups of screening and drying devices 100 are all located inside the casing 200 and connected to the inner wall of the casing 200. The screening and drying device 100 comprises a grinding assembly 130: and further comprises: a screening assembly 110 connected to the grinding assembly 130;

[0030] The screening component 110 includes a receiving shell 111, the end walls of two adjacent groups of receiving shells 111 are fixedly connected, and the side walls are located on the same plane. The top surface of the receiving shell 111 is set with an inclination. A receiving area 112 is opened in the middle of the receiving shell 111, and movable grooves 113 are opened on both side walls of the top of the receiving area 112. Two groups of symmetrical receiving grooves 114 are opened at the bottom of the two groups of movable grooves 113. Square slots 115 are opened on both side walls of the front end of the receiving shell 111. Four groups of L-shaped plates 116 and hollow sleeves 120 are fixedly installed at the bottom of the receiving shell 111. The four groups of L-shaped plates 116 and the hollow sleeves 120 are respectively located at the four corners of the bottom of the receiving area 112. The top surfaces of the four groups of L-shaped plates 116 and the bottom of the receiving shell 111 are rotatably connected with crank shafts 117. A servo motor 118 is fixedly installed at the bottom of each L-shaped plate 116. The output shafts of the four servo motors 118 are fixedly connected to the bottoms of the four crank shafts 117 respectively. The middle of the four crank shafts 117 are rotatably connected with connecting rods 119. The inner walls of the four hollow sleeves 120 are slidably connected with pistons 121. The inner walls of the four pistons 121 are fixedly installed with receiving rods 122. The ends of the four connecting rods 119 are rotatably connected to the four receiving rods 122 respectively. A screen 123 is provided in the middle of the receiving area 112. The two side walls of the screen 123 are slidably connected to the inner walls of the two groups of movable grooves 113 respectively. Two groups of symmetrically arranged receiving blocks 124 are fixedly installed at the bottom of both sides of the screen 123. The four groups of receiving blocks 124 are slidably connected to the four groups of receiving grooves 114 respectively. The bottom of the screen 123 The four corners of the housing 200 are fixedly installed with fixing blocks 125, and the two sets of fixing blocks 125 at the same end are fixedly installed with the same fixing rod 126. The two ends of the fixing rod 126 slide through the two sets of hollow sleeves 120 respectively, and are fixedly connected to the side walls of the pistons 121 in the two sets of hollow sleeves 120. Specifically, different materials are added to the first belt transmission mechanism 210 inside the housing 200 through the first feeding channel 230 and the second feeding channel 240, and the first belt transmission mechanism 210 is started to transport the materials to the receiving shell 111 at the top. Under the action of gravity, the first cylinder 135 and the second cylinder 139 are driven at the same time, so that the materials can pass through the gap formed between the upper grinding roller 138 and the lower grinding roller 133, and the upper grinding roller 13 8 and the lower grinding roller 133 can grind the material so that the crushed material enters the screen 123. As the upper grinding roller 138 grinds, part of the material will be adsorbed on the upper grinding roller 138. At this time, the scraper 140 can scrape the material on the upper grinding roller 138 and synchronously drive the four servo motors 118 at the same time. The output shaft of the servo motor 118 drives the crank shaft 117 to rotate, so that the crank shaft 117 drives the connecting rod 119 to move, so that the piston 121 located in the hollow sleeve 120 follows the connecting rod 119 to reciprocate, thereby driving the fixing rod 126 to reciprocate, so that the screen 123 fixedly connected to the fixing rod 126 is quickly shaken, so as to achieve the effect of screening the material. After screening by three screens 123,Qualified materials will pass through the screen 123 and fall onto the second belt transmission mechanism 220 at the front end, and be collected at the bottom of the housing 200, while unqualified materials will fall onto the second belt transmission mechanism 220 and be discharged from the discharge trough 270.

[0031] Furthermore, the grinding assembly 130 includes a plug plate 131, and the plug plates 131 are provided with two groups. The outer walls of the two groups of plug plates 131 are respectively fixedly connected to the inner walls of the two groups of square slots 115. Three groups of slide grooves 141 are opened in the middle of the two groups of plug plates 131. The outer walls of the two groups of plug plates 131 are slidably connected to the sliders 132 through the slide grooves 141. The inner walls of the two groups of sliders 132 are rotatably connected to the same lower grinding roller 133. The two side walls at the front end of the receiving shell 111 are fixedly installed with limit plates 134. The inner walls of the two groups of limit plates 134 are fixedly installed with first cylinders 135. The output ends of the two groups of first cylinders 135 are respectively rotatably connected to the tops of the two groups of sliders 132. The inner walls of the two sides of the top of the front end of the receiving shell 111 are rotatably connected to the same limit roller 136, and the two ends of the limit roller 136 are fixedly installed with inclined rods 137 The bottom of the two groups of inclined rods 137 are rotatably connected to the same upper grinding roller 138, and the inner walls on both sides of the top of the front end of the receiving shell 111 are rotatably connected to the second cylinder 139. The output ends of the two groups of second cylinders 139 are respectively rotatably connected to the middle parts of the two groups of inclined rods 137. The middle parts of the two groups of inclined rods 137 are fixedly installed with the same scraper 140, and one side of the scraper 140 is tangent to the roller surface of the upper grinding roller 138. Specifically, the first cylinder 135 and the second cylinder 139 are driven to allow the material to pass through the gap formed between the upper grinding roller 138 and the lower grinding roller 133, and at the same time, the upper grinding roller 138 and the lower grinding roller 133 can grind the material. At the same time, as the upper grinding roller 138 is grinded, part of the material will be adsorbed on the upper grinding roller 138. At this time, the scraper 140 can scrape the material on the upper grinding roller 138.

[0032] Furthermore, the side walls of the three groups of receiving shells 111 are fixedly connected to the inner side walls of the casing 200, a first belt transmission mechanism 210 is fixedly installed on the top inner wall of the casing 200, a first feeding channel 230 and a second feeding channel 240 are fixedly installed on the top of the casing 200, the bottoms of the first feeding channel 230 and the second feeding channel 240 are both connected to the first belt transmission mechanism 210, the ends of the first belt transmission mechanism 210 are connected to the receiving shell 111 located at the top, two groups of second belt transmission mechanisms 220 are fixedly installed on the bottom inner wall of the casing 200, and the transportation directions of the two groups of second belt transmission mechanisms 220 are opposite, a hot air inlet fan 250 is fixedly installed on the front end side wall of the casing 200, and the hot air inlet fan 250 is connected to the inside of the casing 200, and an exhaust fan 260 is fixedly installed on the top rear end of the casing 200. 60 is connected to the interior of the casing 200, and a discharge chute 270 is provided on the bottom side wall of the rear end of the casing 200. The discharge chute 270 is connected to the second belt transmission mechanism 220 located at the end. Specifically, during the screening process, the hot air inlet fan 250 is driven to blow hot air into the interior of the casing 200, so that the blown hot air can quickly dry the material inside the casing 200. At the same time, the vacuum fan 260 is driven to extract the humid air inside the casing 200, thereby completing the gas replacement and achieving the purpose of quickly drying the material. In particular, after screening by the three screens 123, qualified materials will pass through the screens 123 and fall onto the second belt transmission mechanism 220 at the front end, and be collected at the bottom of the casing 200, while unqualified materials will fall onto the second belt transmission mechanism 220 and be discharged from the discharge chute 270.

[0033] The use process of the present invention is as follows: a person skilled in the art adds different materials to the first belt transmission mechanism 210 inside the casing 200 through the first feeding channel 230 and the second feeding channel 240, starts the first belt transmission mechanism 210 to transport the materials to the receiving casing 111 at the top, and drives the first cylinder 135 and the second cylinder 139 at the same time under the action of gravity, so that the materials can pass through the gap formed between the upper grinding roller 138 and the lower grinding roller 133, and at the same time, the upper grinding roller 138 and the lower grinding roller 133 can grind the materials, so that the crushed materials enter the screen 123, and as the upper grinding roller 138 grinds, part of the materials will be adsorbed on the upper grinding roller 138, and at this time, the scraper 140 can The material on the upper grinding roller 138 is scraped, and four servo motors 118 are driven synchronously at the same time. The output shaft of the servo motor 118 drives the crank shaft 117 to rotate, so that the crank shaft 117 drives the connecting rod 119 to move, so that the piston 121 located in the hollow sleeve 120 follows the connecting rod 119 to reciprocate, thereby driving the fixing rod 126 to reciprocate, and the screen 123 fixedly connected to the fixing rod 126 to shake quickly, so as to achieve the effect of screening the material. After screening by the three screens 123, the qualified material will pass through the screen 123 and fall onto the second belt transmission mechanism 220 at the front end, and be collected at the bottom of the casing 200, and the unqualified material will fall onto the second belt transmission mechanism 220 and be discharged from the discharge trough 270;

[0034] During the screening process, the hot air inlet fan 250 is driven to blow hot air into the casing 200 so that the blown hot air can quickly dry the material inside the casing 200. At the same time, the vacuum fan 260 is driven to extract the humid air inside the casing 200, thereby completing gas replacement and achieving the purpose of quickly drying the material.

[0035] The above is only a preferred embodiment of the present invention. Any person skilled in the art may modify the present invention by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A device for preparing a coal water slurry additive, comprising a screening and drying device (100) and a casing (200), wherein the screening and drying device (100) is provided with three groups, the three groups of the screening and drying devices (100) are arranged in a linear array and are connected in pairs, the three groups of the screening and drying devices (100) are all located inside the casing (200) and are connected to the inner wall of the casing (200), characterized in that: The screening and drying device (100) comprises a grinding assembly (130), and further comprises a screening assembly (110) connected to the grinding assembly (130); The screening assembly (110) comprises a receiving shell (111), the end walls of two adjacent groups of the receiving shells (111) are fixedly connected, and the side walls are located on the same plane, the top surface of the receiving shell (111) is arranged with an inclination, a receiving area (112) is provided in the middle of the receiving shell (111), both side walls of the top of the receiving area (112) are provided with movable grooves (113), and the bottoms of the two groups of movable grooves (113) are provided with two groups of symmetrically arranged receiving grooves (114), the front side walls of the receiving shell (111) are provided with square slots (115), and four groups of L-shaped plates (116) and hollow sleeves (120) are fixedly installed at the bottom of the receiving shell (111), and the four groups of L-shaped plates (116) and hollow sleeves (120) are provided with a plurality of slots (114) arranged in a plurality of slots (115) arranged in a plurality of slots (116) arranged in a plurality of slots (114 ... 120) are respectively located at the four corners of the bottom of the receiving area (112), the top surfaces of the four groups of L-shaped plates (116) and the bottom of the receiving shell (111) are rotatably connected with crank shafts (117), the bottoms of the four groups of L-shaped plates (116) are fixedly installed with servo motors (118), the output shafts of the four groups of servo motors (118) are respectively fixedly connected with the bottoms of the four groups of crank shafts (117), the middle parts of the four groups of crank shafts (117) are rotatably connected with connecting rods (119), the inner walls of the four groups of hollow sleeves (120) are slidably connected with pistons (121), the inner walls of the four groups of pistons (121) are fixedly installed with receiving rods (122), and the ends of the four groups of connecting rods (119) are rotatably connected with the four groups of receiving rods (122); A screen (123) is provided in the middle of the receiving area (112). The two side walls of the screen (123) are respectively slidably connected to the inner walls of the two groups of movable grooves (113). Two groups of symmetrically arranged receiving blocks (124) are fixedly installed on the bottom of both sides of the screen (123). The four groups of receiving blocks (124) are respectively slidably connected to the four groups of receiving grooves (114). Fixing blocks (125) are fixedly installed at the four corners of the bottom of the screen (123). The two groups of fixing blocks (125) located at the same end are fixedly installed with the same fixing rod (126). The two ends of the fixing rod (126) respectively slide through the two groups of hollow sleeves (120) and are fixedly connected to the side walls of the pistons (121) in the two groups of hollow sleeves (120).

2. A device for preparing a coal water slurry additive according to claim 1, characterized in that: The grinding assembly (130) comprises a plug plate (131), wherein the plug plates (131) are provided in two groups, the outer side walls of the two groups of the plug plates (131) are respectively fixedly connected to the inner side walls of the two groups of square slots (115), three groups of slide grooves (141) are provided in the middle of the two groups of the plug plates (131), the outer side walls of the two groups of the plug plates (131) are slidably connected to a slider (132) through the slide grooves (141), the inner side walls of the two groups of the sliders (132) are rotatably connected to the same lower grinding roller (133), the front end side walls of the receiving shell (111) are fixedly installed with limit plates (134), the inner side walls of the two groups of the limit plates (134) are fixedly installed with a first cylinder (135), and the two groups of the first cylinders (13 5) The output ends are rotatably connected to the tops of the two groups of sliders (132), the inner walls on both sides of the front end top of the receiving shell (111) are rotatably connected to the same limiting roller (136), both ends of the limiting roller (136) are fixedly installed with inclined rods (137), the bottoms of the two groups of inclined rods (137) are rotatably connected to the same upper grinding roller (138), the inner walls on both sides of the front end top of the receiving shell (111) are rotatably connected to the second cylinder (139), the output ends of the two groups of the second cylinder (139) are rotatably connected to the middle parts of the two groups of inclined rods (137), the middle parts of the two groups of inclined rods (137) are fixedly installed with the same scraper (140), and one side of the scraper (140) is tangent to the roller surface of the upper grinding roller (138).

3. The device for preparing a coal water slurry additive according to claim 1, characterized in that: The three groups of side walls of the receiving shell (111) are fixedly connected to the inner wall of the casing (200); a first belt transmission mechanism (210) is fixedly installed on the top inner wall of the casing (200); a first feed channel (230) and a second feed channel (240) are fixedly installed on the top of the casing (200); the bottoms of the first feed channel (230) and the second feed channel (240) are both connected to the first belt transmission mechanism (210); the end of the first belt transmission mechanism (210) is connected to the receiving shell (111) located at the top; and a first belt transmission mechanism (210) is fixedly installed on the bottom inner wall of the casing (200). Two sets of second belt transmission mechanisms (220), the two sets of second belt transmission mechanisms (220) have opposite transport directions, a heat inlet fan (250) is fixedly installed on the front end side wall of the casing (200), the heat inlet fan (250) is communicated with the interior of the casing (200), an exhaust fan (260) is fixedly installed on the top rear end of the casing (200), the exhaust fan (260) is communicated with the interior of the casing (200), and a discharge trough (270) is provided on the bottom side wall of the rear end of the casing (200), and the discharge trough (270) is communicated with the second belt transmission mechanism (220) located at the end.

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