Sawdust high-speed drying machine

Abstract

The utility model relates to a high-speed saw dust dryer, which belongs to the field of biomass particle processing and comprises a drying cylinder, a heating lining, a driving motor, a rotating hollow shaft and a spiral conveying block. A heating lining is fixedly installed in the drying cylinder, a driving motor is fixedly installed on the right side of the drying cylinder, a rotating hollow shaft rotationally connected with the inner wall of the drying cylinder is fixedly installed at the position of an output shaft of the driving motor, and a spiral conveying block is fixedly communicated with the outer portion of the rotating hollow shaft. According to the high-speed saw dust drying machine, saw dust in the drying cylinder is heated and dried through the arranged heating lining, and a driving motor arranged in a matched mode works to drive a spiral conveying block on a rotating hollow shaft to rotate so as to convey and stir the saw dust in the drying cylinder, so that the drying uniformity of materials is improved; and the material circulating assembly, the drying assembly and the heat supply and exhaust structure are arranged in a matched mode to achieve circulating drying of the materials, and the drying efficiency and effect are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of biomass particle processing, in particular to a sawdust high -speed drying -machine. BACKGROUND

[0002] Biomass particle sawdust drying is to remove the moisture in sawdust and other biomass raw materials to improve its calorific value, storage stability and combustion efficiency. Sawdust usually contains high moisture, which will affect its performance as fuel, so drying is an important link in biomass particle production.

[0003] Among them, the rotary dryer is a kind of equipment commonly used in biomass particle sawdust drying, its working principle and structural design make it can efficiently remove the moisture in the material. The following is the basic structure and working principle of rotary dryer:

[0004] Structure of rotary dryer

[0005] Cylinder:

[0006] The core part of the rotary dryer, usually in the form of a cylinder, with a certain inclination angle inside, the material of the cylinder is generally high-temperature-resistant and corrosion-resistant steel.

[0007] Feed inlet:

[0008] The material enters the dryer through the feed inlet, usually located at one end of the cylinder.

[0009] Discharge port:

[0010] The dried material is discharged through the discharge port, usually located at the other end of the cylinder.

[0011] Heat source system:

[0012] The device that provides heat, common heat sources include coal, gas, electric heating, etc. Hot air enters the dryer through the hot air pipeline.

[0013] Transmission device:

[0014] Including motor, speed reducer and transmission shaft, used for driving the cylinder to rotate.

[0015] Material lifting device:

[0016] The lifting plate or spiral blade set in the cylinder, used to lift and disperse the material, so that it is in full contact with hot air, improving the drying efficiency.

[0017] Exhaust system:

[0018] Used for discharging the moisture generated in the drying process, usually including exhaust pipe and fan.

[0019] The spiral blade cannot completely realize the dispersion of the materials by cooperating with the rotation auxiliary heating, the materials are easily bonded and accumulated together due to moisture, and thus uneven drying is caused, so the sawdust high-speed drying machine for improving drying efficiency and uniformity is designed to solve the prior art defects. Inventive content

[0020] In view of the defects of the prior art, the sawdust high-speed drying machine has the advantages of improving drying efficiency and uniformity.

[0021] To achieve the above object, the utility model provides the following technical scheme: a kind of sawdust high-speed drying machine, including drying cylinder, heating lining, driving motor, rotating hollow shaft and spiral conveying block;

[0022] The inside of the drying cylinder is fixedly installed with a heating lining, the right side of the drying cylinder is fixedly installed with a driving motor, the output shaft of the driving motor is fixedly installed with a rotating hollow shaft that is rotatably connected with the inner wall of the drying cylinder, and the outside of the rotating hollow shaft is fixedly connected with a spiral conveying block;

[0023] A material circulation assembly for circulating the sawdust up and down is arranged on the drying cylinder;

[0024] A drying assembly for uniformly drying the circulated materials is arranged on the material circulation assembly;

[0025] A heat supply and exhaust structure for uniformly drying the spiral-conveyed sawdust is arranged between the drying assembly and the rotating hollow shaft.

[0026] As a preferred technical scheme of the utility model, the material circulation assembly comprises a spiral conveying cylinder communicated with the left side of the drying cylinder, an electric motor is fixedly installed at the bottom of the spiral conveying cylinder, a spiral conveying roller is fixedly installed at the output shaft of the electric motor and rotatably connected with the top wall of the spiral conveying cylinder, a conveying box is fixedly installed at the top right side of the spiral conveying cylinder, conveying pulleys are rotatably connected to the left and right sides of the inner cavity of the conveying box, a conveying belt is sleeved between the outer sides of the two conveying pulleys, and a conveying motor is fixedly installed at the output shaft and fixed with the conveying pulleys on the front face of the conveying box.

[0027] The right side of the conveying box is communicated with a discharging pipe, the top of the discharging pipe is communicated with an automatic on-off valve, and the discharging pipe and the drying cylinder are communicated with a material return pipe located at the left side of the automatic on-off valve.

[0028] As a preferred technical scheme of the utility model, the communication opening of the spiral conveying cylinder and the drying cylinder is flush with the bottom wall of the drying cylinder, the communication opening of the spiral conveying cylinder and the conveying box is flush with the upper surface of the conveying belt, and the left lower surface of the discharging pipe is in contact with the upper surface of the conveying belt.

[0029] As a preferred technical scheme of the utility model, the drying assembly comprises a heating box fixedly installed on the top of the drying cylinder, a blower is communicated with the top of the heating box, and a straight pipe is fixedly installed on the other end of the heating box and communicated with the top of the conveying box.

[0030] The bottom of the straight pipe is communicated with a plurality of horizontally distributed horizontal pipes, the bottom of the horizontal pipe is communicated with a plurality of exhaust pipes which are horizontally distributed and in contact with the upper surface of the conveying belt, a plurality of exhaust holes are formed in the outer portion of the exhaust pipe, and a filter screen is arranged on the outer portion of the exhaust pipe.

[0031] As a preferred technical scheme of the utility model, the distribution width of the exhaust pipe is equal to the width of the conveying belt, and the width of the conveying belt is equal to the width of the inner cavity of the conveying box.

[0032] As a preferred technical scheme of the utility model, the heat supply and exhaust structure comprises a plurality of air inlet holes formed in the outer portion of the rotating hollow shaft, a rotating sleeve rotating on the outer portion of the rotating hollow shaft and located outside the air inlet hole, a plurality of air blowing holes formed in the outer portion of the spiral conveying block and horizontally distributed, and a separation net attached to the outer portion of the spiral conveying block and located outside the air blowing hole.

[0033] The gas pipe is communicated between the straight pipe and the rotating sleeve.

[0034] Compared with the prior art, the technical scheme of the utility model has the following beneficial effects:

[0035] The sawdust high-speed drying machine is heated and dried by the heating lining, the spiral conveying block on the rotating hollow shaft is driven to rotate by the driving motor to convey and stir the sawdust in the drying cylinder, the material circulation assembly, the drying assembly and the heat supply and exhaust structure are cooperatively arranged to realize the circulation drying of the material, and the efficiency and effect of drying are improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 It is a perspective view of the utility model;

[0037] Fig. 2 It is a sectional view of the utility model;

[0038] Fig. 3 It is an enlarged view of A of the utility model;

[0039] Fig. 4 It is a partial perspective view of the utility model;

[0040] Fig. 5 It is a side perspective view of the utility model.

[0041] In the figure: 1, drying cylinder; 2, heating lining; 3, drive motor; 4, rotating hollow shaft; 5, spiral conveying block; 6, spiral conveying cylinder; 7, motor; 8, spiral conveying roller; 9, conveying box; 10, conveying pulley; 11, conveying belt; 12, conveying motor; 13, discharge pipe; 14, automatic on-off valve; 15, return pipe; 16, heating box; 17, air blower; 18, straight pipe; 19, cross pipe; 20, exhaust pipe; 21, exhaust hole; 22, filter screen; 23, air blowing hole; 24, isolation screen; 25, air inlet hole; 26, rotating sleeve; 27, air pipe. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] Please refer to Figs. 1 to 5 The sawdust high-speed drying machine in the embodiment comprises a drying cylinder 1, a heating lining 2, a drive motor 3, a rotating hollow shaft 4 and a spiral conveying block 5.

[0044] It should be noted that the heating lining 2 is fixedly installed inside the drying cylinder 1, the drive motor 3 is fixedly installed on the right side of the drying cylinder 1, the output shaft of the drive motor 3 is fixedly installed with the rotating hollow shaft 4 which is rotationally connected with the inner wall of the drying cylinder 1, and the rotating hollow shaft 4 is fixedly connected with the spiral conveying block 5 outside.

[0045] The heating lining 2 is uniformly distributed with heating wires inside.

[0046] The number of the spiral conveying blocks 5 is several, which are uniformly distributed outside the rotating hollow shaft 4 and in a spiral shape.

[0047] The bottom of the drying cylinder 1 is installed with a support seat, and the rear surface of the drying cylinder 1 is installed with a control machine box for overall equipment system control operation and power supply.

[0048] The drying cylinder 1 in the embodiment is provided with a material circulation assembly for circulating sawdust feeding and discharging.

[0049] It should be noted that the material circulation assembly comprises a spiral conveying cylinder 6 communicated with the left side of the drying cylinder 1, a motor 7 fixedly installed at the bottom of the spiral conveying cylinder 6, a spiral conveying roller 8 rotatably connected with the top wall of the spiral conveying cylinder 6 and fixedly installed at the output shaft of the motor 7, a conveying box 9 fixedly installed at the top right side of the spiral conveying cylinder 6, conveying pulleys 10 rotatably connected with the left and right sides of the inner cavity of the conveying box 9, a conveying belt 11 sleeved between the outer portions of the two conveying pulleys 10, and a conveying motor 12 fixedly installed at the output shaft and fixedly installed with the conveying pulleys 10 at the front face of the conveying box 9.

[0050] The top of the conveying box 9 is communicated with a feeding hopper, and the rear surface of the conveying box 9 is provided with an exhaust pipe, and the outer portion of the exhaust pipe is communicated with an on-off control valve.

[0051] The right side of the conveying box 9 is communicated with a discharging pipe 13, the top of the discharging pipe 13 is communicated with an automatic on-off valve 14, and the discharging pipe 13 is communicated with a material returning pipe 15 located at the left side of the automatic on-off valve 14 and between the discharging pipe 13 and the drying cylinder 1.

[0052] The communication opening between the spiral conveying cylinder 6 and the drying cylinder 1 is flush with the bottom wall of the drying cylinder 1, the communication opening between the spiral conveying cylinder 6 and the conveying box 9 is flush with the upper surface of the conveying belt 11, and the left side lower surface of the discharging pipe 13 is in contact with the upper surface of the conveying belt 11.

[0053] The material circulation assembly in the embodiment is provided with a drying assembly for uniformly drying the circulated materials.

[0054] It should be noted that the drying assembly comprises a heating box 16 fixedly installed at the top of the drying cylinder 1, a blower 17 communicated with the top of the heating box 16, and a straight pipe 18 fixedly installed with the top of the conveying box 9 and communicated with the other end of the heating box 16.

[0055] The inside of the heating box 16 is provided with heating wires.

[0056] The exhaust port of the blower 17 is communicated with the heating box 16

[0057] The bottom of the straight pipe 18 is communicated with a plurality of equidistantly distributed horizontal pipes 19, the bottom of each horizontal pipe 19 is communicated with a plurality of equidistantly distributed exhaust pipes 20 in contact with the upper surface of the conveying belt 11, the outer portion of each exhaust pipe 20 is provided with a plurality of exhaust holes 21, and the outer portion of each exhaust pipe 20 is sleeved with a filter screen 22.

[0058] The pore size of the filter screen 22 is smaller than the size of the debris.

[0059] The distribution width of the exhaust pipes 20 is equal to the width of the conveying belt 11, and the width of the conveying belt 11 is equal to the inner cavity width of the conveying box 9.

[0060] The drying assembly in the embodiment is provided with a heat supply and exhaust structure for uniformly drying the sawdust conveyed by the screw.

[0061] It can be understood that the heat supply and exhaust structure comprises a plurality of air inlet holes 25 provided on the outer portion of the rotating hollow shaft 4, a rotating sleeve 26 rotating on the outer portion of the rotating hollow shaft 4 and located outside the air inlet holes 25, a plurality of air outlet holes 23 provided on the outer portion of the screw conveying block 5 and distributed at equal distances, and a separation net 24 attached to the outer portion of the screw conveying block 5 and located outside the air outlet holes 23.

[0062] The aperture of the separation net 24 is smaller than the size of the sawdust.

[0063] The straight pipe 18 is in communication with the rotating sleeve 26 through an air pipe 27.

[0064] The working principle of the above embodiment is as follows:

[0065] The sawdust in the drying cylinder 1 is heated and dried by the heating lining 2, and the sawdust is conveyed and stirred by the rotation of the screw conveying block 5 on the rotating hollow shaft 4 driven by the driving motor 3, so that the sawdust is dispersed and thrown, and is conveyed into the screw conveying cylinder 6.

[0066] At the same time, the screw conveying roller 8 is rotated by the driving motor 7, the sawdust is conveyed into the conveying box 9, and the sawdust is continuously fed and laid on the conveying belt 11, and the conveying belt 11 on the conveying belt wheel 10 is rotated by the driving motor 12, so that the sawdust is uniformly conveyed, the air flow is blown into the heating box 16 by the air blower 17, and the air flow is heated by the heating box 16, so that the air flow is uniformly distributed on the surface of the conveying belt 11 through the mutual communication among the heating box 16, the straight pipe 18, the horizontal pipe 19, the exhaust pipe 20 and the exhaust hole 21, and then the hot air flow is uniformly distributed and penetrated into the conveyed sawdust through the exhaust hole 21, so as to ensure the uniform heating and drying effect of the sawdust, the filter screen 22 is provided to prevent the sawdust from entering the exhaust hole 21, and the sawdust after drying is conveyed through the return pipe 15 on the unloading pipe 13 and is reloaded into the drying cylinder 1 (at this time, the automatic on-off valve 14 is in the closed state);

[0067] In addition, after the sawdust after drying is re-discharged into the drying cylinder 1, the driving motor 3 is driven to rotate the helical conveying block 5 on the rotating hollow shaft 4 to convey and stir the sawdust in the drying cylinder 1, and meanwhile, the straight pipe 18, the air pipe 27, the rotating sleeve 26, the air inlet 25, the rotating hollow shaft 4, the helical conveying block 5 and the air blowing hole 23 are in communication with each other, so that the hot air is blown out through the air blowing hole 23 to fully contact and dry the conveyed sawdust while the sawdust is helically conveyed and stirred, thereby further improving the drying efficiency and effect (the isolation net 24 separates the sawdust to avoid entering the air blowing hole 23, the rotating sleeve 26 is arranged to rotate with the rotating hollow shaft 4 to avoid the rotating hollow shaft 4 from rotating to drive the rotating sleeve 26 to rotate synchronously), and in addition, the sawdust after drying treatment can be re-entered into the helical conveying cylinder 6 to realize the recycling drying treatment work.

[0068] The electrical components in the present application are electrically connected with the main controller and the power supply. The main controller can be a conventional known device such as a computer, and the existing disclosed power connection technology is not described herein.

Claims

1. A sawdust high-speed dryer, comprising a drying cylinder (1), a heating lining (2), a driving motor (3), a rotating hollow shaft (4) and a spiral conveying block (5); The inside of the drying cylinder (1) is fixedly installed with the heating lining (2), the right side of the drying cylinder (1) is fixedly installed with the driving motor (3), the output shaft of the driving motor (3) is fixedly installed with the rotating hollow shaft (4) which is rotationally connected with the inner wall of the drying cylinder (1), and the outside of the rotating hollow shaft (4) is fixedly communicated with the spiral conveying block (5); characterized in that A material circulation assembly for circulating the sawdust is arranged on the drying cylinder (1); An drying assembly for uniformly drying the circulated material is arranged on the material circulation assembly; A heat supply and exhaust structure for uniformly drying the spiral-conveyed sawdust is arranged between the drying assembly and the rotating hollow shaft (4).

2. A sawdust high-speed drying machine according to claim 1, characterized in that: The material circulation assembly comprises a spiral conveying cylinder (6) which is communicated with the left side of the drying cylinder (1), the bottom of the spiral conveying cylinder (6) is fixedly installed with a motor (7), the output shaft of the motor (7) is fixedly installed with a spiral conveying roller (8) which is rotationally connected with the top wall of the spiral conveying cylinder (6), the top right side of the spiral conveying cylinder (6) is fixedly installed with a conveying box (9), the left and right sides of the inner cavity of the conveying box (9) are rotationally connected with conveying pulleys (10), the outside of the two conveying pulleys (10) is sleeved with a conveying belt (11), and the front of the conveying box (9) is fixedly installed with a conveying motor (12) whose output shaft is fixedly installed with the conveying pulleys (10); The right side of the conveying box (9) is communicated with a discharging pipe (13), the top of the discharging pipe (13) is communicated with an automatic on-off valve (14), and the discharging pipe (13) and the drying cylinder (1) are communicated with a material returning pipe (15) which is located at the left side of the automatic on-off valve (14).

3. A sawdust high-speed drying machine according to claim 2, characterized in that: The communication opening between the spiral conveying cylinder (6) and the drying cylinder (1) is flush with the bottom wall of the drying cylinder (1), the communication opening between the spiral conveying cylinder (6) and the conveying box (9) is flush with the upper surface of the conveying belt (11), and the left lower surface of the discharging pipe (13) is in contact with the upper surface of the conveying belt (11).

4. A sawdust high-speed drying machine according to claim 3, characterized in that: The drying assembly comprises a heating box (16) which is fixedly installed on the top of the drying cylinder (1), the top of the heating box (16) is communicated with a blower (17), and the other end of the heating box (16) is communicated with a straight pipe (18) which is fixedly installed with the top of the conveying box (9); The bottom of the straight pipe (18) is communicated with a plurality of transverse pipes (19) which are equidistantly distributed, the bottom of each transverse pipe (19) is communicated with an exhaust pipe (20) which is equidistantly distributed and in contact with the upper surface of the conveying belt (11), a plurality of exhaust holes (21) are formed in the outside of each exhaust pipe (20), and a filter screen (22) is sleeved on the outside of each exhaust pipe (20).

5. A sawdust high-speed drying machine according to claim 4, characterized in that: The distribution width of the exhaust pipe (20) is equal to the width of the conveying belt (11), and the width of the conveying belt (11) is equal to the width of the inner cavity of the conveying box (9).

6. A sawdust high-speed drying machine according to claim 5, characterized in that: The heat supply exhaust structure comprises a plurality of air inlet holes (25) opened on the outer part of the rotating hollow shaft (4), a rotating sleeve (26) rotating on the outer part of the rotating hollow shaft (4) and located outside the air inlet holes (25), a plurality of air blowing holes (23) opened on the outer part of the screw conveying block (5) and distributed at equal distances, and a separation net (24) attached to the outer part of the screw conveying block (5) and located outside the air blowing holes (23). Wherein, the air pipe (27) is in communication between the straight pipe (18) and the rotating sleeve (26).

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