CN106440708B

CN106440708B - Sawdust dryer

Info

Publication number: CN106440708B
Application number: CN201610759506.XA
Authority: CN
Inventors: 庄德恩
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-30
Filing date: 2016-08-30
Publication date: 2022-08-09
Anticipated expiration: 2036-08-30
Also published as: CN106440708A

Abstract

The invention relates to the technical field of wood chip drying, in particular to a novel wood chip dryer. The utility model provides a novel saw-dust drying-machine, establishes the right-hand member lid at cylinder right-hand member portion and drives cylinder pivoted rotary mechanism including cylinder, the cover that has the heat preservation effect, cover, still includes circulation heating device, circulation heating device is including setting up at the inside heat pipe of cylinder and the heating device who is connected with the heat pipe both ends, constitutes a circulation circuit between heating device and the heat pipe, is filled with heat-conducting medium in the circulation circuit, is equipped with the circulation charge pump on the circulation circuit, circulation charge pump drive heat-conducting medium circulates in this circulation circuit and flows. The drying machine has the advantages of uniform drying temperature, controllable drying temperature, uniform wood chip quality, high drying speed, little powder after drying, high heat utilization rate, energy conservation, environmental protection, safety and controllability.

Description

Sawdust dryer

Technical Field

The invention relates to the technical field of wood chip drying, in particular to a wood chip dryer.

Background

When utilizing the saw-dust preparation biomass fuel granule, need dry the saw-dust earlier, make its moisture content reduce to the within range of needs, go out the moisture evaporation in it, make it meet the requirements, natural drying low cost, it is fairly simple to operate, but natural drying spends for a long time, and the place that needs is great, receives the influence of natural condition big, poor stability, and the saw-dust volume of drying at every turn is little moreover, can not satisfy large-scale production and processing demand.

Then people utilize the drying-machine to dry the saw-dust, it is compared and dries area little, the stoving time is short with nature, and current stoving to the saw-dust is gone on in the cylinder, puts into the cylinder with the saw-dust through feed mechanism in, utilizes rotary device to let the cylinder rotate, then dries the saw-dust in the cylinder through hot air conveying mechanism, but, current drying-machine also has the weak point: the heat of at first drying is inhomogeneous, and the time that needs to dry is longer, and in the time of secondly drying, the saw-dust is with the heat exchange efficiency of steam low, the moisture content qualification rate of the saw-dust of drying out is low, and the quality of saw-dust is inhomogeneous moreover, and in particular, when dust concentration is higher in the cylinder, this kind of drying-machine is very easily lighted and explodes.

Disclosure of Invention

Aiming at the defects, the invention aims to provide the sawdust dryer which has the advantages of uniform drying temperature, controllable drying temperature, uniform sawdust quality, high drying speed, high heat utilization rate, energy conservation, environmental protection, safety and controllability.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the utility model provides a saw-dust drying-machine, includes the cylinder that has the heat preservation effect, overlaps the left end lid of establishing at cylinder left end portion, overlaps the right-hand member lid of establishing at cylinder right-hand member portion and drive cylinder pivoted rotary mechanism, still includes circulation heating device, circulation heating device is including setting up at the inside heat pipe of cylinder and the heating device who is connected with the heat pipe both ends, constitutes a circulation circuit between heating device and the heat pipe, is filled with the heat-conducting medium in the circulation circuit, is equipped with the circulation charge pump on the circulation circuit, circulation charge pump drive heat-conducting medium circulates in this circulation circuit and flows.

Therefore, the sawdust in the roller is heated unevenly in a manner of drying the sawdust in the roller by hot air of the hot air conveying mechanism, so that the circulating heat supply device is arranged in the roller drying machine, the heat supply device heats the heat-conducting medium in the circulating loop to raise the temperature, the circulating electric pump enables the heat-conducting medium to circularly flow in the circulating loop, the inside of the roller is heated evenly, and the problem of uneven heating is solved.

Preferably, the heat pipe comprises a heat-conducting medium feeding section, a heat-conducting medium heat-transferring section and a heat-conducting medium refluxing section in sequence, the heat-conducting medium heat-transferring section is a spiral coil pipe and is located inside the roller, and a plurality of radiating fins are sleeved outside the spiral coil pipe.

However, the heated temperature inside the drum cannot be so equalized only by the flow of the heat transfer medium. So heat-conducting medium heat transfer section is spiral coil, and the heat transfer scope grow of spiral coil in the cylinder, and heat transfer is even, and in order to improve the efficiency of heat transfer, overlaps at spiral coil's outside and is equipped with a plurality of fin for its efficiency of heat transfer is faster, and the scope is wider, has thoroughly solved the uneven problem of being heated.

Preferably, the heat-conducting medium feeding section and the heat-conducting medium returning section are provided with temperature controllers, and the temperature controllers are connected to the circulating electric pump through wires.

Accordingly, the heating in the roller is uniform, but the heated temperature is uncontrollable, so that temperature controllers are arranged on the heat-conducting medium feeding section and the heat-conducting medium refluxing section, the temperature controllers detect the temperatures of the heat-conducting medium feeding section and the heat-conducting medium refluxing section firstly, when the temperature of the heat-conducting medium feeding section or the heat-conducting medium refluxing section is too high, the temperature controllers close the heating device, the circulating electric pump does not convey the heat-conducting medium any more, when the temperature of the heat-conducting medium feeding section or the heat-conducting medium refluxing section is too low, the temperature controllers open and accelerate the circulating electric pump, and the circulating electric pump continues to drive, so that the heated temperature in the roller is controlled, and the required drying temperature can be set.

Preferably, the left end cover is provided with a blanking cavity communicated with the roller, the top of the blanking cavity is provided with a feeding channel, the bottom of the blanking cavity is provided with an air inlet channel, the air inlet channel is arranged right below the feeding channel, one end of the feeding channel is connected with a feeding device, the other end of the feeding channel is communicated to the blanking cavity, and one end of the air inlet channel is connected with an air supply device.

In view of the above, in order to accelerate the speed of drying, the event carries out the predrying to the material earlier and handles, the inside of left end cover has the blanking chamber with the cylinder intercommunication, its top is equipped with feedstock channel, its bottom just is located feedstock channel under the department be equipped with inlet channel, inlet channel is corresponding with feedstock channel like this, the material is from the feeding of top feedstock channel, and the inlet channel of below advances hot-blastly, hot-blastly carry out the predrying to the material like this, make the speed of drying faster, efficiency is higher.

Preferably, a material storage cavity is arranged in the feeding channel, a material shifting mechanism is arranged in the material storage cavity, the material shifting mechanism comprises a motor, a rotating shaft sleeved on the motor and a plurality of shifting blades arranged on the rotating shaft, and the movable ends of the shifting blades are tangent to the inner wall of the material storage cavity.

In view of the above, though the stoving in advance that goes on the material is handled, but can make the unloading difficulty, to this be equipped with the storage cavity in feedstock channel, be equipped with in the storage cavity and dial material mechanism, through the rotation of motor drive axis of rotation, drive the epaxial stirring vane of axis of rotation and stir the material, stir the expansion end of blade moreover with the inner wall of storage cavity is tangent, has blockked that hot-blast air blows feedstock channel for the unloading is even.

Preferably, the bottom of the blanking cavity is provided with a material separation mesh close to the air inlet channel, and the material separation mesh separates materials with larger diameters and prevents the materials from falling to block the air inlet channel.

Because during the predrying, when the unloading was very fast, the great, heavier material of diameter probably directly drops, probably blocks up inlet air channel, so be close to at the bottom in blanking chamber inlet air channel department is equipped with and separates the material net piece, and the great, heavier material of diameter has just fallen on separating the material net piece like this, and the less, lighter material of diameter just is directly blown by hot-blast.

Preferably, the blanking cavity is internally provided with a material distribution part, the material distribution part is a frustum, the end face with larger area is arranged at the end part of the roller, the end face with smaller area is arranged on the inner wall of the left end cover, and the material distribution part is composed of a screen.

Preferably, the mesh diameter of the material separation mesh is smaller than that of the material distribution piece.

Therefore, when the blanking is fast, the heavier materials with larger diameters can directly fall off and can block the material separation mesh, and therefore, the blanking cavity is internally provided with the material separation part which is composed of the screen, so that the materials are screened in advance through the material separation part in the blanking process, the screened materials fall off, the material separation part is in a frustum shape, the end face with larger area is arranged at the end part of the roller, the end face with smaller area is arranged on the inner wall of the left end cover, and even if more materials are fed, hot air can be ensured to pass through the material separation part from the place with higher taper. Therefore, the materials are screened, and the quality of the sawdust is ensured to be similar.

Preferably, a plurality of first material guide pieces are circumferentially arranged on the inner wall of the drum and close to the left end cover, a plurality of second material guide pieces are circumferentially arranged on the inner wall of the drum, the first material guide pieces are provided with inclined material guide surfaces, and the inclined material guide surfaces are parallel to the conical surface of the material distributing piece and have a distance of 1-2mm from the conical surface of the material distributing piece.

Therefore, after the materials are pre-dried and pre-screened, the materials are stacked at the position of the material distribution piece, a first material guide piece is arranged, the first material guide piece is provided with an inclined material guide surface, the material guide surface is parallel to the conical surface of the material distribution piece, the distance between the material guide surface and the conical surface of the material distribution piece is 1-2mm, the first material guide piece turns the materials and conveys the materials into the roller due to the rotation of the roller, and then the second material guide piece turns the materials and conveys the materials to the discharging position. Therefore, the materials are heated uniformly, the conveying speed is high, and the materials cannot be stacked.

Preferably, the top of the right end cover is provided with an exhaust channel, the bottom of the right end cover is provided with a discharge channel, and the exhaust channel and the discharge channel are communicated with the roller.

Therefore, water vapor and the like in the roller are discharged from the exhaust channel, and the dried materials are discharged from the discharge channel.

Preferably, the heat supply device is a boiler, and hot air exhausted from a chimney of the boiler is treated and then is connected with the air inlet device.

Preferably, the spiral coil is arranged in parallel or perpendicular to the drum.

Preferably, the heat transfer medium may be heat transfer oil, heat vapor, or the like.

The invention has the following beneficial effects: the drying machine has the advantages of uniform drying temperature, controllable drying temperature, uniform wood chip quality, high drying speed, little powder after drying, high heat utilization rate, energy conservation, environmental protection, safety and controllability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of example 2;

in the figure, a 1-roller, a 1-1-first material guide piece, a 1-1-1-material guide surface, a 1-2-second material guide piece, a 2-left end cover, a 2-1-blanking cavity, a 2-2-material feeding channel, a 2-2-1-material storage cavity, a 2-3-air feeding channel, a 3-right end cover, a 3-1-exhaust channel, a 3-2-material discharging channel, a 4-circulation heat supply device, a 4-1-heat guide pipe, a 4-1-1-heat guide medium feeding section, a 4-4-2-heat guide medium heat transfer section, a 4-1-3-heat guide medium reflux section, a 4-1-4-heat radiating fin, a 4-2-heat supply device, a, 5-a circulating electric pump, 6-a temperature controller, 7-a rotating mechanism, 8-a feeding device, 9-an air supply device, 10-a material stirring mechanism, 10-1-a rotating shaft, 10-2-stirring blades, 11-a material distributing part and 12-a material isolating mesh sheet.

Detailed Description

The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any inventive step, are within the scope of the present invention.

The present invention will be described in detail below by way of examples with reference to the accompanying drawings.

Example 1: referring to fig. 1, a wood chip dryer comprises a drum 1 with a heat preservation function, a left end cover 2 sleeved on the left end of the drum, a right end cover 3 sleeved on the right end of the drum, a rotating mechanism 7 driving the drum to rotate, and a circulation heat supply device 4, wherein the circulation heat supply device 4 comprises a heat conduction pipe 4-1 arranged inside the drum 1 and a heat supply device 4-2 connected with two ends of the heat conduction pipe 4-1, a circulation loop is formed between the heat supply device 4-2 and the heat conduction pipe 4-1, a heat conduction medium is filled in the circulation loop, a circulation electric pump 5 is arranged on the circulation loop, and the circulation electric pump 5 drives the heat conduction medium to circularly flow in the circulation loop.

Referring to fig. 2, the heat conducting pipe 4-1 sequentially includes a heat conducting medium feeding section 4-1-1, a heat conducting medium heat conducting section 4-1-2, and a heat conducting medium refluxing section 4-1-3, the heat conducting medium heat conducting section 4-1-2 is a spiral coil pipe and is located inside the drum 1, a plurality of heat radiating fins 4-1-4 are sleeved outside the spiral coil pipe, and the spiral coil pipe is placed in parallel with the drum 1.

Referring to fig. 2, the heat-conducting medium feeding section 4-1-1 and the heat-conducting medium returning section 4-1-3 are provided with a temperature controller 6, and the temperature controller 6 is connected to the electric circulation pump 5 through a wire.

Referring to fig. 2, a blanking cavity 2-1 communicated with the roller 1 is arranged inside the left end cover 2, a feeding channel 2-2 is arranged at the top of the left end cover, an air inlet channel 2-3 is arranged at the bottom of the left end cover and under the feeding channel 2-2, one end of the feeding channel 2-2 is connected with a feeding device 8, the other end of the feeding channel is communicated with the blanking cavity 2-1, and one end of the air inlet channel 2-3 is connected with an air supply device 9.

Referring to fig. 2, a material storage cavity 2-2-1 is arranged in the feeding channel 2-2, a material stirring mechanism 10 is arranged in the material storage cavity 2-2-1, the material stirring mechanism 10 includes a motor, a rotating shaft 10-1 sleeved on the motor, and a plurality of stirring blades 10-2 arranged on the rotating shaft 10-1, and the movable ends of the stirring blades 10-2 are tangent to the inner wall of the material storage cavity 2-2-1.

Referring to fig. 2, a material distributing member 11 is arranged in the blanking cavity 2-1, the material distributing member 11 is a frustum, an end face with a larger area is arranged at the end of the roller 1, an end face with a smaller area is arranged on the inner wall of the left end cover 2, and the material distributing member 11 is composed of a screen.

Referring to fig. 2, a plurality of first material guide pieces 1-1 are circumferentially arranged on the inner wall of the drum 1 and near the left end cover 2, a plurality of second material guide pieces 1-2 are circumferentially arranged on the inner wall of the drum, the first material guide pieces 1-1 have inclined material guide surfaces 1-1-1, and the material guide surfaces 1-1-1 are parallel to the conical surface of the material distributing member 11 and have a distance of 1-2mm from the conical surface of the material distributing member 11.

Referring to fig. 2, a material separation mesh sheet 12 is arranged at the bottom of the blanking cavity 2-1 and close to the air inlet channel 2-3, and the material separation mesh sheet 12 separates materials with larger diameters and prevents the materials from falling to block the air inlet channel 2-3.

Referring to fig. 2, the mesh diameter of the spacer mesh 12 is smaller than that of the distributing member 11.

Referring to fig. 2, the top of the right end cover 3 is provided with an exhaust channel 3-1, the bottom of the right end cover is provided with a discharge channel 3-2, and the exhaust channel 3-1 and the discharge channel 3-2 are communicated with the roller 1.

Referring to fig. 2, the heating device 4-2 is a boiler, and hot air exhausted from a chimney of the boiler is treated and then is connected with an air inlet device.

A screening fan is arranged in the feeding device 8, and the materials enter the feeding channel 2-2 after being primarily screened.

Example 2: referring to fig. 3, the present embodiment is substantially the same as the embodiment, the only difference being: the spiral coil is arranged perpendicular to the drum 1.

In the work, the screened materials are discharged into a material storage cavity 2-2-1 from a feeding channel 2-2, the materials are shifted into a material dropping cavity 2-1 in a left end cover 2 by a material shifting mechanism 10 in the material storage cavity 2-2-1, meanwhile, hot air filtered in a chimney of a boiler of a heating device 4-2 is blown into the material dropping cavity 2-1 from an air inlet channel 2-3 by an air supply device 9, the materials are screened and separated by a material distributing part 11 in the falling process, the heavier materials with larger diameters fall onto a material separating net 12 below the material distributing part 11, the lighter materials with smaller diameters are pre-dried and screened under the action of the hot air, the roller 1 rotates under the action of a rotating mechanism 7, and a first material guide sheet 1-1 and a second material guide sheet 1-2 are arranged on the inner wall of the roller 1, the first guide sheet 1-1 stirs and conveys materials into the roller 1, the second guide sheet 1-2 stirs and conveys the materials to the discharge passage 3-2, a heat conduction medium is arranged in a heat conduction pipe 4-1 in the roller and is heated under the action of a boiler of a heating device 4-2, a circulating electric pump 5 drives the heat conduction medium to circularly flow in the heat conduction pipe, so that the materials in the roller are dried, the dried materials are conveyed out from the discharge passage 3-2, water vapor is discharged from an exhaust passage 3-1, and the discharged water vapor is subjected to dust removal and filtration through a dust removal device.

When the temperature of the heat-conducting medium feeding section 4-1-1 or the heat-conducting medium return section 4-1-3 is too high, the temperature controller 6 closes the heat supply device 4-2 (boiler), the heat supply device 4-2 does not heat the heat-conducting medium any more, when the temperature of the heat-conducting medium feeding section 4-1-1 or the heat-conducting medium return section 4-1-3 is too low, the temperature controller 6 starts and accelerates the circulating electric pump 5, and the circulating electric pump 5 is continuously driven, so that the heated temperature in the roller 1 is controlled, and the required drying temperature can be set.

Claims

1. The utility model provides a saw-dust drying-machine, establishes left end lid (2), the cover at the cylinder left end portion including cylinder (1), the cover that has the heat preservation effect and establishes right-hand member lid (3) and drive cylinder pivoted rotary mechanism (7) at the cylinder right-hand member portion, its characterized in that: the heat-conducting roller type heat-conducting drum is characterized by further comprising a circulating heat supply device (4), wherein the circulating heat supply device (4) comprises a heat-conducting pipe (4-1) arranged inside the drum (1) and a heat supply device (4-2) connected with two ends of the heat-conducting pipe (4-1), a circulating loop is formed between the heat supply device (4-2) and the heat-conducting pipe (4-1), a heat-conducting medium is filled in the circulating loop, a circulating electric pump (5) is arranged on the circulating loop, and the circulating electric pump (5) drives the heat-conducting medium to circularly flow in the circulating loop;

a blanking cavity (2-1) communicated with the roller (1) is formed in the left end cover (2), a feeding channel (2-2) is arranged at the top of the left end cover, an air inlet channel (2-3) is arranged at the bottom of the left end cover and is positioned under the feeding channel (2-2), one end of the feeding channel (2-2) is connected with a feeding device (8), the other end of the feeding channel is communicated with the blanking cavity (2-1), and one end of the air inlet channel (2-3) is connected with an air supply device (9);

a material distributing part (11) is arranged in the blanking cavity (2-1), the material distributing part (11) is a frustum body, the end face with the larger area is arranged at the end part of the roller (1), the end face with the smaller area is arranged on the inner wall of the left end cover (2), and the material distributing part (11) is composed of a screen mesh;

the top of the right end cover (3) is provided with an exhaust channel (3-1), the bottom of the right end cover is provided with a discharge channel (3-2), and the exhaust channel (3-1) and the discharge channel (3-2) are communicated with the roller (1).

2. The wood chip dryer according to claim 1, characterized in that: the heat conduction pipe (4-1) sequentially comprises a heat conduction medium feeding section (4-1-1), a heat conduction medium heat transfer section (4-1-2) and a heat conduction medium backflow section (4-1-3), the heat conduction medium heat transfer section (4-1-2) is a spiral coil pipe and is located inside the roller (1), and a plurality of radiating fins (4-1-4) are sleeved outside the spiral coil pipe.

3. The wood chip dryer according to claim 2, characterized in that: the heat-conducting medium feeding section (4-1-1) and the heat-conducting medium refluxing section (4-1-3) are provided with temperature controllers (6), and the temperature controllers (6) are connected to the circulating electric pump (5) through wires.

4. The wood chip dryer according to claim 1, characterized in that: the feeding device is characterized in that a material storage cavity (2-2-1) is arranged in the feeding channel (2-2), a material stirring mechanism (10) is arranged in the material storage cavity (2-2-1), the material stirring mechanism (10) comprises a motor, a rotating shaft (10-1) sleeved on the motor and a plurality of stirring blades (10-2) arranged on the rotating shaft (10-1), and the movable ends of the stirring blades (10-2) are tangent to the inner wall of the material storage cavity (2-2-1).

5. The wood chip dryer according to claim 1, characterized in that: the inner wall of the roller (1) and the position close to the left end cover (2) are circumferentially provided with a plurality of first material guide pieces (1-1), the inner wall of the roller body is circumferentially provided with a plurality of second material guide pieces (1-2), the first material guide pieces (1-1) are provided with inclined material guide surfaces (1-1-1), the material guide surfaces (1-1-1) are parallel to the conical surface of the material distributing piece (11), and the distance between the material guide surfaces and the conical surface of the material distributing piece (11) is 1-2 mm.

6. The wood chip dryer according to claim 1, characterized in that: the bottom of the blanking cavity (2-1) is provided with a material separation mesh sheet (12) close to the air inlet channel (2-3), and the material separation mesh sheet (12) separates the material with larger diameter and prevents the material from falling to block the air inlet channel (2-3).

7. The wood chip dryer according to claim 6, characterized in that: the mesh diameter of the material separation mesh (12) is smaller than that of the material distribution piece (11).