CN112393584A - External heating rotary equipment - Google Patents

Abstract

The application discloses external heat rotary equipment which comprises a roller and a combustion cylinder, wherein the combustion cylinder is sleeved on the periphery of the roller in a sealing manner, and the roller rotates relative to the combustion cylinder which is fixedly arranged; the device is characterized by further comprising a lifting plate arranged on the outer wall of the roller and positioned in the combustion cylinder. The cylinder is at the pivoted in-process, and the lifting blade rotates along with the cylinder, and the lifting blade will gather in the energy material of combustion cylinder bottom and raise, makes the energy material in the diffusion burning of combustion cylinder for burning rate has increased combustion range, makes energy material fully burn, has saved energy resource consumption, and the heat of production can satisfy the heating demand, has improved the combustion efficiency of energy material.

Description

External heating rotary equipment

Technical Field

The invention relates to the technical field of rotary equipment, in particular to external heat rotary equipment.

Background

The existing external heat rotary equipment mainly comprises a roller and a combustion cylinder, wherein the combustion cylinder is sleeved at the periphery of the roller, the combustion cylinder which is fixedly arranged relative to the roller is in rotary motion, materials roll in the roller and move, and heat generated by combustion of energy substances in the combustion cylinder is transferred to the materials in the roller through the wall of the roller. However, the energy material in the combustion cylinder is not sufficiently combusted, the heat cannot meet the requirement, and the energy material is wasted.

In summary, how to improve the combustion efficiency of the combustion cylinder becomes a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention is directed to an external heat rotating apparatus to improve the combustion efficiency of a combustion can.

In order to achieve the purpose, the invention provides the following technical scheme:

an external heat rotary device comprises a rotary drum and a combustion drum, wherein the combustion drum is hermetically sleeved on the periphery of the rotary drum, and the rotary drum rotates relative to the combustion drum which is fixedly arranged; the device also comprises a material raising plate which is arranged on the outer wall of the roller and is positioned in the combustion cylinder.

Preferably, in the external heat rotary equipment, the material raising plates are distributed along the axial direction and the circumferential direction of the drum.

Preferably, in the external heat rotating apparatus, a rotation surface formed by rotating the tips of the plurality of material raising plates is continuous in the axial direction of the drum.

Preferably, in the external heat rotary equipment, the material lifting plate surface of the material lifting plate is parallel to or inclined to the axial direction of the roller.

Preferably, in the external heat rotary equipment, a lifting plate surface of the lifting plate is inclined toward the feed end of the drum, so that the transfer direction of the energy substances in the combustion cylinder is opposite to the moving direction of the materials in the drum.

Preferably, in the external heat rotary device, the end of the material raising plate is a bent part bent along the rotation direction of the drum.

Preferably, in the external heat rotary equipment, the bent portions of the material raising plates are provided with material leaking notches.

Preferably, in the external heat rotary apparatus, the external heat rotary apparatus further includes a gas communication cavity which is arranged in the drum and isolated from the inside of the drum, the gas communication cavity is communicated with the combustion drum through a communication hole arranged on the drum wall of the drum for introducing the heating gas of the combustion drum into the gas communication cavity, and a chamber wall of the gas communication cavity is used for transferring heat with the material in the drum.

Preferably, in the external heat rotary equipment, at least one communication hole is formed between two circumferentially adjacent material raising plates and used for disturbing the heated gas in the combustion cylinder, so that the heated gas enters the gas communication cavity and irregular convection is generated.

Preferably, in the external heat rotary apparatus, the gas communication cavity is a continuous cavity structure or a plurality of split cavity structures.

Preferably, in the external heat rotary apparatus, a wall of the gas communication cavity on one side is attached to and fixed to or shared with an inner wall of the drum, and the communication hole is formed in a wall of the gas communication cavity attached to or shared with the drum.

Preferably, in the external heat rotary equipment, the gas communication cavity is one or more groups of spiral cavities, the spiral cavities extend spirally along the axial direction of the drum, and the side wall of the spiral cavity and the wall of the drum form a spiral material channel.

Preferably, in the external heat rotating apparatus, one or more communication holes are formed in a wall of the spiral structure cavity, which is attached to or shared by the drum, and the plurality of communication holes are arranged along a spiral direction.

Preferably, in the external heat rotary equipment, the spiral structure cavity is an annular spiral structure cavity, and a radial distance exists between an inner ring of the annular spiral structure cavity and the axis of the drum.

Preferably, in the external heat rotary apparatus, the combustion cylinder is provided with an observation port, an ignition port, a gas inlet/outlet, and a waste outlet.

Preferably, in the external heat rotary equipment, two ends of the combustion cylinder are connected with the outer cylinder wall of the drum in a contact friction type rotation sealing mode.

Compared with the prior art, the invention has the beneficial effects that:

in the external heat rotary equipment provided by the invention, the combustion cylinder is arranged on the periphery of the roller in a sealing manner, and the roller rotates relative to the combustion cylinder which is fixedly arranged; the outer wall of the roller is also provided with a material raising plate positioned in the combustion cylinder. Because the combustion cylinder is fixed, the energy material in the combustion cylinder is accumulated at the bottom of the combustion cylinder, the energy material can not be fully combusted, the combustion efficiency is lower, the generated heat is slow, the heating demand of the material in the cylinder can not be met, therefore, the lifting plate is arranged on the outer wall of the cylinder, the cylinder is in the rotating process, the energy material accumulated at the bottom of the combustion cylinder is lifted by the lifting plate, the energy material is enabled to be diffused and combusted in the combustion cylinder, the combustion speed is accelerated, the combustion range is increased, the energy material is enabled to be fully combusted, the energy consumption is saved, the generated heat can meet the heating demand, and the combustion efficiency of the energy material is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic front view of an external heat rotating apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a material raising plate of an external heat rotating device according to an embodiment of the present invention;

FIG. 3 is a schematic front view of another external heat swing apparatus provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional structural view of the external heat rotating apparatus of FIG. 3;

fig. 5 is a schematic view of a drum wall structure of a drum of an external heat rotating apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic axial sectional view of an external heat rotating apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic side view of a combustion can of an external heat rotating apparatus according to an embodiment of the present invention.

Wherein, 1 is a roller, 2 is a combustion cylinder, 21 is a gas inlet and outlet, 22 is an observation port, 23 is an ignition port, 24 is a waste outlet, 3 is a gas communication cavity, 4 is a communication hole, 5 is a spiral material channel, 6 is a material raising plate, 61 is a bending part, and 62 is a material leakage notch.

Detailed Description

The core of the invention is to provide an external heat rotary device, which improves the combustion efficiency of the combustion cylinder.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, an embodiment of the present invention provides an external heat rotating apparatus, including a rotary drum 1 and a combustion drum 2, wherein the combustion drum 2 is hermetically sleeved on an outer periphery of the rotary drum 1, and the rotary drum 1 rotates relative to the combustion drum 2 which is fixedly disposed; the external heat rotary equipment also comprises a material raising plate 6 which is arranged on the outer wall of the roller 1 and is positioned in the combustion cylinder 2.

Because the combustion cylinder 2 is fixed, the energy substance in the combustion cylinder 2 is accumulated at the bottom of the combustion cylinder 2, the energy substance can not be fully combusted, the combustion efficiency is lower, the generated heat is slow, the heating demand of the material in the cylinder 1 can not be met, therefore, the material raising plate 6 is arranged on the outer wall of the cylinder 1, the cylinder 1 is in the rotating process, the material raising plate 6 rotates along with the cylinder 1, the energy substance accumulated at the bottom of the combustion cylinder 2 is raised by the material raising plate 6, the energy substance is diffused and combusted in the combustion cylinder 2, the combustion speed is accelerated, the combustion range is increased, the energy substance is fully combusted, the energy consumption is saved, the generated heat can meet the heating demand, and the combustion efficiency of the energy substance is improved.

Further, in this embodiment, the number of the material raising plates 6 is a plurality of, and distributes along the axial direction and the circumference of the drum 1, and the energy substances in the combustion cylinder 2 are continuously raised and thrown to make the energy substances fully combust. More preferably, the material raising plates 6 are uniformly distributed on the outer wall of the drum 1, so that the combustion is more uniform and the heat distribution is uniform.

Furthermore, in the embodiment, the rotating surfaces formed by the rotation of the tail ends of all the material raising plates 6 are continuous and uninterrupted in the axial direction of the roller 1, so that all the energy substances at the bottom of the combustion cylinder 2 are raised, omission does not exist, the combustion is more sufficient, and energy waste is avoided.

In this embodiment, the lifting plate surface of the lifting plate 6 is parallel to or inclined to the axial direction of the roller 1, so arranged, the material turning area of the lifting plate surface of the lifting plate 6 is increased, and the material at the bottom of the combustion cylinder 2 can be raised and thrown more conveniently. The lifting blade 6 that the slope set up can also be followed the axial with the energy material and shed and transfer to be convenient for the energy material in the combustion cylinder 2 is transferred to the exit end by the entrance point of combustion cylinder 2.

Further, the lifting plate surface of the lifting plate 6 inclines towards the feeding end of the roller 1, so that the transfer direction of the energy materials in the combustion cylinder 2 is opposite to the moving direction of the materials in the roller 1. That is, the positions of the inlet end and the outlet end of the combustion cylinder 2 and the positions of the inlet end and the outlet end of the roller 1 are reversed, so that the heat generated by the combustion of the energy substance of the combustion cylinder 2 and the heat absorbed by the material in the roller 1 are balanced with each other, and the utilization rate of the heat is improved. Of course, the material lifting plate surface of the material lifting plate 6 may be inclined toward the discharge end of the roller 1, but the heat utilization rate is not as the case is in this embodiment.

In this embodiment, the material raising plate 6 extends in the radial direction of the drum 1, and thus the length of the material raising plate 6 can be reduced.

As shown in fig. 2, the present embodiment provides a specific material raising plate 6, the end of the material raising plate 6 is a bent portion 61 bent along the rotation direction of the drum 1, the energy material accumulated at the bottom of the combustion cylinder 2 is easier to be scooped up by the bent portion 61, and the energy material is temporarily left at the bent portion 61, which is beneficial to being scooped up and thrown. Of course, the material raising plate 6 may also be a straight plate or an arc plate, the inner arc surface of the arc plate faces the same direction as the rotation direction of the drum, and the material raising plate 6 is not limited to the illustrated structure.

Further, in this embodiment, the kink 61 of lifting blade 6 is provided with leaks material breach 62, leaks the quantity of material breach 62 and can be one, two or more, leaks material breach 62 and is similar to and points the seam, and the energy material is dragged for the back by the kink 61 of lifting blade 6, and the dispersion is thrown through leaking material breach 62 to the in-process energy material that raises at lifting blade 6 to it is more even to make the energy material diffusion, makes its abundant burning.

As shown in fig. 3-6, in the present embodiment, the external heat rotary device further includes a gas communication cavity 3 disposed inside the drum 1 and isolated from the inside of the drum 1, the gas communication cavity 3 is communicated with the combustion drum 2 through a communication hole 4 disposed on the wall of the drum 1 for introducing the heating gas of the combustion drum 2 into the gas communication cavity 3, and the wall of the gas communication cavity 3 is used for transferring heat with the material inside the drum 1.

The working process of the external heat rotating equipment is as follows: the material gets into in the cylinder 1, along with the rotation of cylinder 1, in order to guarantee material reaction effect, cylinder 1 is rotatory slow, the material removes along section of thick bamboo wall landing in cylinder 1, in this process, heat in the combustion drum 2 transmits to in the cylinder 1 through the section of thick bamboo wall of cylinder 1, the material contacts with section of thick bamboo wall in the in-process of landing in cylinder 1 and conducts heat, and simultaneously, the heating gas of combustion drum 2 introduces into gaseous intercommunication cavity 3, cavity wall and the material contact through gaseous intercommunication cavity 3 conduct heat, and the cavity wall through gaseous intercommunication cavity 3 radiates the heat to cylinder 1 in, compare in the current material that only heats wherein through the section of thick bamboo wall of cylinder 1, this application has increased the inside heat transfer area of cylinder 1 through the cavity wall of gaseous intercommunication cavity 3 greatly, heat transfer efficiency and heat utilization rate are improved, material reaction time has been saved. Meanwhile, the material raising plate 6 can play a role in air turbulence, so that gas can enter the gas communication cavity 3 and generate irregular convection motion, and heated gas can enter the gas communication cavity 3 more uniformly.

In the embodiment, at least one communication hole 4 is arranged between two circumferentially adjacent material raising plates 6 and is used for disturbing the heating gas in the combustion cylinder 2, so that the heating gas enters the gas communication cavity 3 and irregular convection is generated. The communicating hole 4 can enable the heating gas in the combustion cylinder 2 to enter the gas communicating cavity 3, and solid or liquid materials in the combustion cylinder 2 can be reduced or avoided to enter the gas communicating cavity 3 through the communicating hole 4 as much as possible.

In this embodiment, the gas communication cavity 3 is a continuous cavity structure or a plurality of separated cavity structures. A continuous cavity structure is in gas communication with the combustion cylinder 2, or a plurality of split cavity structures are in gas communication with the combustion cylinder 2 respectively, so long as the heating gas in the combustion cylinder 2 can be introduced into the gas communication cavity 3, the heat transfer area in the roller 1 is increased, and the multidirectional heating of materials is realized.

No matter the gas communication cavity 3 is a continuous cavity structure or a plurality of split cavity structures, the shape and size of the cavity structure are not limited, and the cavity structure can be in any shape, such as a strip-shaped cavity structure, a block-shaped cavity structure, a special-shaped cavity structure and the like, and can be arranged in the roller 1 at will, such as in the axial direction, the transverse direction and the like of the roller 1, as long as the materials can be ensured to circulate in the roller 1 and can transfer heat through the cavity structure.

Of course, the shape, size and number of the communication holes 4 are not limited in this embodiment, and the communication holes 4 may be any shape, such as circular, rectangular, oval, quincunx, etc., as long as it is advantageous for the gas to pass through, and the size of the communication holes 4 depends on the heating requirement, and if the heating requirement is large, a larger communication hole 4 may be provided to ensure sufficient circulation of the heating gas, and conversely, a smaller communication hole 4 may be provided. The number of the communication holes 4 is also set according to the heating requirement, the more the number of the communication holes 4 is, the smoother the circulation of the heating gas in the gas communication cavity 3 is, the faster the heating speed is, otherwise, the slower the heating speed is, but the solid and liquid materials in the combustion cylinder 2 are prevented from entering the gas communication cavity 3 as much as possible.

Further, in this embodiment, a side cavity wall of the gas communication cavity 3 is attached to or shared with an inner wall of the drum 1, that is, the gas communication cavity 3 is located and fixed on the inner drum wall of the drum 1, and the side cavity wall of the gas communication cavity 3 for location may be an independent cavity wall or may be shared with the inner wall of the drum 1. The communicating hole 4 is arranged on the wall of the gas communicating cavity 3 which is jointed or shared with the roller 1, and the gas communicating cavity 3 and the combustion cylinder 2 are kept in gas communication through the communicating hole 4. By fixing the gas communication cavity 3 on the wall of the roller 1, the material in the roller 1 can slide along the wall of the roller 1, so that the opportunity of heat transfer by contact with the wall of the gas communication cavity 3 is increased, the moving speed of the material is delayed, and the heat transfer efficiency is further improved.

Of course, the gas communication cavity 3 may also be suspended in the drum 1, and the cavity wall of the gas communication cavity 3 is not in contact with the inner drum wall of the drum 1, but is suspended and fixed by a support structure. Correspondingly, the gas communication cavity 3 is communicated with the communication hole 4 on the wall of the roller 1 through a communication pipe, so that the gas communication is realized. So set up, the material is in the in-process that removes in cylinder 1, probably rarely contacts with the cavity wall of gas intercommunication cavity 3, nevertheless carries out heat radiation heating through the cavity wall of gas intercommunication cavity 3, can improve heat transfer efficiency equally.

As shown in fig. 4 and fig. 6, further, in this embodiment, the gas communication cavity 3 is preferably one or more sets of spiral structure cavities, the spiral structure cavities extend spirally along the axial direction of the drum 1, the side walls of the spiral structure cavities and the drum wall of the drum 1 form a spiral material channel 5, the multiple sets of spiral structure cavities are sequentially arranged along the axial direction of the drum 1 and combined to form a continuous spiral material channel 5, and a spiral gas channel is formed inside the spiral structure cavities. After so setting up, the space in helical structure cavity can make full use of cylinder 1 provides radial and axial heat convection, heat-conduction, heat radiation passageway between cylinder 1 and the combustion barrel 2, greatly increased heat transfer area. During operation, the material gets into behind the cylinder 1 by the feed end of cylinder 1 in, along with the rotation of cylinder 1, the material removes to the discharge end by the feed end of cylinder 1 gradually in spiral material passageway 5, and the material is ordered about by rotatory helical structure cavity and is moved backward automatically, consequently, cylinder 1 can adopt the form that the level was placed, need not make the feed end be higher than the discharge end slope setting. In the process that the material moves in the spiral material channel 5, the material is always in contact with the side wall of the spiral structure cavity and the wall of the roller 1 to conduct heat, the running path of the material is prolonged, the retention time of the material in the roller 1 is prolonged, the material is fully heated, the heat transfer efficiency is further improved, and the material reaction is more favorably carried out.

Of course, if the gas communication cavity 3 does not adopt a spiral structure cavity, in order to facilitate the movement of the material from the feeding end to the discharging end, the feeding end of the roller 1 is higher than the discharging end in an inclined manner, and the self-movement of the material is realized by the self-weight of the material and the rotation of the roller 1.

As shown in fig. 5, in the present embodiment, one or more communication holes 4 are opened on the wall of the spiral cavity attached to or shared by the drum 1, and the plurality of communication holes 4 are arranged along the spiral direction. If a communication hole 4 is provided, the heating gas with a certain pressure in the combustion cylinder 2 enters the spiral structure cavity through the communication hole 4, in order to make the heating gas fill the spiral structure cavity, the communication hole 4 is arranged at one end of the spiral structure cavity, the heating gas gradually fills the whole cavity from one end of the spiral structure cavity, the communication hole 4 is preferably arranged at one end of the spiral structure cavity close to the discharge end, the flow direction of the heating gas is opposite to the material moving direction, and the heat transfer efficiency is further improved. If a plurality of communication holes 4 are provided, the plurality of communication holes 4 are arranged in the spiral direction of the spiral structure chamber, and preferably, the plurality of communication holes 4 are uniformly distributed to further improve the uniformity of gas heat transfer.

Further, in the present embodiment, the spiral-structured cavity is an annular spiral-structured cavity, and a radial distance exists between an inner ring of the annular spiral-structured cavity and the axis of the drum 1. With the arrangement, the central part of the annular spiral structure cavity forms the axial hollow area which penetrates through the roller 1, and gas generated by reaction in the roller 1 can more smoothly circulate through the hollow area.

Of course, the spiral-structured chamber may also have no hollow area, so that the gas generated by the reaction in the drum 1 can also be conveyed in a spiral manner in the spiral material channel 5, but the path of the gas conveyance is longer.

Preferably, in the embodiment, the difference between the outer ring diameter and the inner ring diameter of the annular spiral structure cavity is greater than 5cm, and the difference between the outer ring diameter and the inner ring diameter of the annular spiral structure cavity is determined according to the heating requirement and the gas conveying requirement in the roller 1. The difference value is determined by ensuring the temperature difference between the combustion cylinder 2 and the roller 1, so that the materials can react fully and the quick coking is avoided.

Preferably, in this embodiment, the width between the two sidewalls of the spiral cavity is 1cm to 100cm, and the width determines the size of the gas spiral channel inside the spiral cavity, thereby determining the size of the heating amount and the size of the heat dissipation area, and ensuring the convection and turbulence of the hot gas flow. More preferably, the width between the two side walls is about 50 cm.

In this embodiment, the pitch of the spiral cavity is equal pitch or variable pitch, and the pitch is greater than 1 cm. The form and size of the pitch are determined according to the temperature gradient and the carbonization requirements of different axial sections in the drum 1.

As shown in fig. 7, the combustion cylinder 2 is optimized, and in the present embodiment, the cylinder body of the combustion cylinder 2 is provided with an observation port 22, an ignition port 23, a gas inlet/outlet 21, and a waste outlet 24. The combustion cylinder 2 is used for combusting energy substances, such as liquid energy substances, solid energy substances and the like, the generated heating gas enters the gas communication cavity 3 through the communication holes 4 on the cylinder wall of the roller 1, and the residual waste materials after combustion are discharged out of the combustion cylinder through the waste material outlet 24. The gas inlet and outlet 21 is used for gas discharge from the combustion cylinder and external gas inlet. The ignition port 23 is used for igniting the source substance in the combustion cylinder. The observation port 22 is used for observing the combustion condition in the combustion cylinder.

In this embodiment, the external heat rotary apparatus further includes a temperature sensor and/or a pressure sensor disposed in the combustion cylinder 2 and/or the drum 1, the temperature sensor detects the temperature in the combustion cylinder 2 and/or the drum 1, the pressure sensor detects the pressure in the combustion cylinder 2 and/or the drum 1, and the reaction is controlled manually or automatically according to the detected temperature and pressure.

In this embodiment, the drum 1 is driven to rotate by a driving device, the driving device mainly includes a motor, a speed reducer, a gear ring, a supporting riding wheel and a rotating ring, the rotating ring is preferably arranged on the peripheries of the two ends of the drum 1, the rotating ring is rotatably supported by the supporting riding wheel below, the motor is matched with the gear ring after being decelerated by the speed reducer, the gear ring is fixed on the periphery of one end of the drum 1, and the gear ring is driven to rotate by the motor, so that the drum 1 is driven to rotate. Of course, the driving device may have other configurations, and is not limited to the illustrated embodiment.

In the embodiment, the two ends of the combustion cylinder 2 are connected with the outer cylinder wall of the roller 1 in a contact friction type rotation sealing mode. Since the drum 1 rotates slowly, the rotary sealing connection of the combustion cylinder 2 and the drum 1 can be realized by a simple rotary structure. In order to improve the structural strength of the rotary seal portion, the wall thickness of the drum 1 is increased at the position where the drum 1 is in contact friction with the combustion cylinder 2. Of course, the combustion cylinder 2 and the drum 1 can also be connected in a rotationally sealed manner by means of other rotationally sealed structures.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

1. An external heat rotary device comprises a roller (1) and a combustion cylinder (2), wherein the combustion cylinder (2) is hermetically sleeved on the periphery of the roller (1), and the roller (1) rotates relative to the combustion cylinder (2) which is fixedly arranged; the device is characterized by further comprising a material raising plate (6) which is arranged on the outer wall of the roller (1) and is positioned in the combustion cylinder (2).

2. External heat rotating equipment according to claim 1, characterized in that the lifter plates (6) are distributed in the axial and circumferential direction of the drum (1).

3. An external heat rotor according to claim 2, characterized in that the rotation surfaces formed by the rotation of the ends of the plurality of the material raising plates (6) are continuous in the axial direction of the drum (1).

4. External heat rotary equipment according to claim 1, characterized in that the lifter plate surface of the lifter plate (6) is parallel or inclined to the axial direction of the drum (1).

5. An external heat rotary apparatus according to claim 4, characterized in that the lifting plate surface of the lifting plate (6) is inclined towards the feeding end of the drum (1) so that the transfer direction of the energy substance in the combustion cylinder (2) is opposite to the moving direction of the material in the drum (1).

6. An external heat rotary device according to claim 1, characterized in that the material raising plate (6) is terminated by a bent portion (61) bent in the rotation direction of the drum (1).

7. External heat rotating equipment according to claim 6, characterized in that the bent part (61) of the lifter plate (6) is provided with a material leakage notch (62).

8. The external heat rotary equipment according to any one of claims 1 to 7, further comprising a gas communication cavity (3) arranged in the drum (1) and isolated from the inside of the drum (1), wherein the gas communication cavity (3) is communicated with the combustion cylinder (2) through a communication hole (4) arranged on the wall of the drum (1) and used for introducing the heating gas of the combustion cylinder (2) into the gas communication cavity (3), and the wall of the gas communication cavity (3) is used for transferring heat with the material in the drum (1).

9. The external-heat rotary kiln according to claim 8, characterized in that at least one communicating hole (4) is formed between two circumferentially adjacent material raising plates (6) and used for disturbing the heating gas in the combustion cylinder (2) so that the heating gas enters the gas communicating cavity (3) and irregular convection is generated.

10. External heat rotating equipment according to claim 8, wherein the gas communication cavity (3) is one continuous cavity structure or a plurality of separate cavity structures.

11. The external heat rotary equipment according to claim 8, wherein a cavity wall on one side of the gas communication cavity (3) is fixedly attached to or shared with the inner wall of the drum (1), and the communicating hole (4) is formed in a drum wall of the gas communication cavity (3) attached to or shared with the drum (1).

12. External heat rotating equipment according to claim 8, characterized in that the gas communication cavity (3) is one or more sets of helical cavities extending helically in the axial direction of the drum (1), the side walls of the helical cavities and the drum wall of the drum (1) forming a helical material channel (5).

13. The external heat rotating equipment according to claim 12, wherein one or more communication holes (4) are formed in the wall of the spiral structure cavity attached to or shared by the drum (1), and the plurality of communication holes (4) are arranged along the spiral direction.

14. External heat rotary device according to claim 13, characterized in that the spiral-structured chamber is an annular spiral-structured chamber, the inner ring of which is radially spaced from the axis of the drum (1).

15. External heat rotary equipment according to claim 8, characterized in that the combustion can (2) is provided with a viewing port (22), a firing port (23), a gas inlet/outlet (21) and a waste outlet (24) on the can.

16. External heat rotary equipment according to claim 8, characterized in that the two ends of the combustion cylinder (2) are connected with the outer cylinder wall of the drum (1) in a contact friction type rotation sealing way.

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