CN111960633A

CN111960633A - Roller pyrolysis machine and pyrolysis method

Info

Publication number: CN111960633A
Application number: CN202010631923.2A
Authority: CN
Inventors: 武振恒
Original assignee: Beijing Yunshui Haorui Environmental Technology Co ltd
Current assignee: Beijing Yunshui Haorui Environmental Technology Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2020-11-20

Abstract

The invention discloses a roller pyrolysis machine and a pyrolysis method, comprising the following steps: the annular space outer cylinder, the heat exchange inner cylinder, the feeding screw conveyor, the discharging screw cylinder and the discharging box. The heat exchange inner cylinder is arranged on the inner side of the annular gap outer cylinder and forms an annular gap with the annular gap outer cylinder, the heat exchange inner cylinder comprises a feeding section, a pyrolysis section and a discharging section which are sequentially connected, the feeding section extends out of one end of the annular gap outer cylinder, and one end of the discharging section shrinks along the direction far away from the feeding section to form a discharging end; the feeding screw conveyor is connected with the inner side of the feeding section; the discharging spiral cylinder is connected with the discharging end and extends out of the other end of the annular gap outer cylinder; the discharge box is connected with the outer side of one end of the discharge spiral cylinder, which is far away from the feeding spiral conveyor. The feeding and discharging of the pyrolysis machine are realized through the spiral, the smooth feeding and discharging of materials are guaranteed, and meanwhile, the sealing surface of the joint is smaller, and the sealing is convenient. In addition, the inner wall of the heat exchange inner barrel is provided with a shoveling plate and a shoveling bucket, so that the heat conduction efficiency is further improved.

Description

Roller pyrolysis machine and pyrolysis method

Technical Field

The invention belongs to the technical field of harmless treatment and resource utilization of municipal sludge, and particularly relates to a roller pyrolysis machine and a pyrolysis method.

Background

The sludge contains a large amount of harmful substances such as pathogenic bacteria, parasitic ova, viruses, heavy metals and the like, and the direct stacking or utilization of the sludge can cause a large burden to the environment. Meanwhile, organic matter components in the sludge can be utilized through various technologies, so that recycling is realized.

The sludge pyrolysis is a process of decomposing organic matters in the sludge to generate pyrolytic carbon, pyrolysis gas and trace tar in an anaerobic atmosphere, and has the advantages of harmlessness, thorough reduction, environmental friendliness, high resource degree and the like. The roller diameter of the roller pyrolysis machine selected mainly at present is large, the dynamic sealing structure is complex, the sealing is difficult, and the pyrolysis gas is easy to leak. Meanwhile, the heat transfer effect is poor due to the fact that the contact surface is few.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a roller pyrolysis machine and a pyrolysis method, which combine a screw with a rotary kiln roller by using a novel feeding and discharging manner, so that a sealing surface at a joint is smaller and is convenient for sealing. Meanwhile, the inner wall of the heat exchange inner cylinder is provided with the shoveling plate and the shoveling bucket, so that the heat conduction efficiency is further improved.

In one aspect of the invention, a roller pyrolysis machine is provided. According to an embodiment of the invention, the pyrolysis machine comprises:

the annular space outer barrel comprises a high-temperature flue gas inlet and a low-temperature flue gas outlet;

the heat exchange inner cylinder is arranged on the inner side of the annular gap outer cylinder, an annular gap is formed between the heat exchange inner cylinder and the annular gap outer cylinder, the heat exchange inner cylinder can be rotatably arranged, the heat exchange inner cylinder comprises a feeding section, a pyrolysis section and a discharging section which are sequentially connected, the diameter of the feeding section is smaller than that of the pyrolysis section, the feeding section extends out of one end of the annular gap outer cylinder, and one end of the discharging section is contracted to form a discharging end along the direction far away from the feeding section;

the feeding screw conveyor is connected with the inner side of the feeding section, and the connection part of the feeding screw conveyor and the feeding section is sealed;

the discharging spiral cylinder is connected with the discharging end and extends out of the other end of the annular gap outer cylinder;

the discharging box is connected with the outer side of one end of the feeding screw conveyor, which is far away from the discharging screw cylinder, the connecting part of the discharging box and the discharging screw cylinder is sealed, and the discharging box comprises an air outlet and a discharging port.

According to the roller pyrolysis machine provided by the embodiment of the invention, the feeding in the pyrolysis machine is realized by the feeding screw conveyer, the discharging is realized by the discharging screw cylinder, and the feeding and the discharging are realized by screws, so that the smooth feeding and discharging of materials are ensured. Meanwhile, the diameters of the feeding screw conveyor and the discharging screw cylinder are very small, so that the sealing surface of a joint is reduced, the sealing is simpler, the sealing effect is better, and the pyrolysis gas in the heat exchange inner cylinder is prevented from leaking from the joint to cause environmental pollution; meanwhile, the air is prevented from entering the heat exchange inner barrel from the joint, and the danger of combustion and explosion is avoided, so that the safe and stable operation of the equipment is ensured. The heat exchange inner cylinder generates pyrolysis gas, so that a good sealing effect is ensured, the pyrolysis gas cannot be leaked to the outside, and meanwhile, air is prevented from entering the heat exchange inner cylinder so as to avoid combustion and explosion risks. Compared with the existing equipment, the invention reduces the sealing ring, so that the sealing is simpler and the sealing effect is better.

In addition, the roller pyrolysis machine according to the above embodiment of the present invention may further have the following additional technical features:

in some embodiments of the invention, a shoveling bucket is arranged on the inner wall of the pyrolysis section, and a shoveling plate is arranged on the inner wall of the discharge section. Therefore, the materials roll in the rotating inner cylinder, and fully exchange heat with the shoveling plate and the shoveling bucket, so that the materials are heated and generate pyrolysis reaction, and meanwhile, the shoveling bucket can shovel the materials existing in the shoveling bucket when the inner cylinder rotates and enables the materials to rotate to the upper side along with the shoveling bucket, so that the heat exchange time of the materials is prolonged, and the heat conduction efficiency is improved.

In some embodiments of the invention, the inner wall of the discharge screw cylinder is provided with continuous spiral sheets. Therefore, the discharging spiral cylinder can more conveniently push the pyrolyzed materials out of the discharging spiral cylinder through the spiral.

In some embodiments of the invention, the length of the hopper is 1/10-1/5 of the diameter of the pyrolysis section. From this, the material in the pyrolysis section carries out more abundant heat transfer with copying bucket.

In some embodiments of the invention, the length of the flight is 1/10-1/5 of the diameter of the discharge section where the flight is located. Therefore, the material in the discharging section and the shoveling plate exchange heat more fully.

In some embodiments of the invention, the continuous flight has a length of 1/10-1/5 of the diameter of the discharge screw barrel.

In some embodiments of the invention, the diameter of the feed section is 1/5-1/4 of the diameter of the pyrolysis section, and the diameter of the discharge screw barrel is 1/10-1/5 of the diameter of the pyrolysis section. From this, the diameter of feeding section and ejection of compact spiral shell is all very little to reduce the sealed face of junction, make it sealed simpler, sealed effect is better.

In some embodiments of the invention, the feed screw conveyor is sealed from the feed section by a third sealing ring. Therefore, the pyrolysis gas in the heat exchange inner cylinder is further prevented from leaking from the joint of the feeding screw conveyor and the feeding section to cause environmental pollution; meanwhile, the air is prevented from entering the heat exchange inner barrel from the joint, and the danger of combustion and explosion is avoided, so that the safe and stable operation of the equipment is ensured.

In some embodiments of the invention, the discharge tank and the discharge screw cylinder are sealed by a fourth sealing ring. Therefore, the pyrolysis gas in the heat exchange inner cylinder is further prevented from leaking from the joint to cause environmental pollution; meanwhile, the air is prevented from entering the heat exchange inner barrel from the joint, and the danger of combustion and explosion is avoided, so that the safe and stable operation of the equipment is ensured.

In some embodiments of the invention, the flight tip of the feed screw conveyor is 10-20cm from the vertical length of the pyrolysis section. Therefore, materials can be spirally accumulated at the inlet, so that pyrolysis gas cannot flow back to the outside of the equipment from the inside of the feeding spiral.

In some embodiments of the invention, the junction of the feeding section and one end of the annular space outer cylinder is sealed, and the junction of the discharging spiral cylinder and the other end of the annular space outer cylinder is sealed.

In some embodiments of the invention, the feed section is sealed with one end of the annular space outer cylinder by a first sealing ring; and the discharging spiral cylinder and the other end of the annular space outer cylinder are sealed through a second sealing ring. Therefore, high-temperature flue gas in the annular space is further prevented from leaking from the joint to influence the heating efficiency.

In some embodiments of the invention, the high temperature flue gas inlet is arranged below the annular space outer cylinder; the low-temperature flue gas outlet is arranged above the annular space outer barrel.

In some embodiments of the invention, the air outlet is disposed above the discharge box, and the discharge port is disposed below the discharge box.

In some embodiments of the invention, the pyrolysis machine further comprises: the first supporting wheel is arranged below the feeding section; and the second supporting wheel is arranged below the discharging spiral cylinder.

In a second aspect of the invention, a method of performing pyrolysis using a roller pyrolysis machine as described above is presented. According to an embodiment of the invention, the method comprises:

(1) conveying the material into a feeding section through a feeding screw conveyor;

(2) the material is pushed into the pyrolysis section and the discharging section through a screw, so that the material is heated and pyrolysis reaction is generated;

(3) pushing the material pyrolyzed in the step (2) to a discharging spiral cylinder and discharging the material from the discharging spiral cylinder;

(4) and pushing the pyrolyzed material to a discharging box and discharging the material from the discharging box.

According to the pyrolysis method provided by the embodiment of the invention, the feeding is realized by the feeding screw conveyor, the discharging is realized by the discharging screw cylinder, and the feeding and the discharging are both realized by screws, so that the smooth feeding and discharging of materials are ensured. Meanwhile, the diameters of the feeding screw conveyor and the discharging screw cylinder are very small, so that the sealing surface of a joint is reduced, the sealing is simpler, the sealing effect is better, and the pyrolysis gas in the heat exchange inner cylinder is prevented from leaking from the joint to cause environmental pollution; meanwhile, the air is prevented from entering the heat exchange inner barrel from the joint, and the danger of combustion and explosion is avoided, so that the safe and stable operation of the equipment is ensured.

In addition, the method for drying and pyrolyzing sludge according to the above embodiment of the invention may also have the following additional technical features:

in some embodiments of the invention, in the step (2), the material is subjected to sufficient heat exchange with the shoveling bucket on the inner wall of the pyrolysis section and the shoveling plate in the discharging section, so that the material is heated and pyrolysis reaction is carried out.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a drum pyrolysis machine according to an embodiment of the present invention.

Fig. 2 is a schematic view of a drum pyrolysis apparatus according to still another embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of the rotation direction of the heat exchange inner barrel according to one embodiment of the invention.

FIG. 4 is a schematic flow diagram of a method for pyrolysis of sludge according to one embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In one aspect of the invention, a roller pyrolysis machine is provided. According to an embodiment of the present invention, referring to fig. 1, the pyrolysis apparatus includes: the device comprises an annular space outer cylinder 1, a heat exchange inner cylinder 2, a feeding screw conveyor 3, a discharging screw cylinder 4 and a discharging box 5.

According to an embodiment of the invention, referring to fig. 1, an annular space outer cylinder 1 comprises a high temperature flue gas inlet 11 and a low temperature flue gas outlet 12. The annular space outer cylinder 1 is the outermost wall. It should be noted that the positions of the high temperature flue gas inlet 11 and the low temperature flue gas outlet 12 are not limited in particular, and can be selected by those skilled in the art according to actual needs. As a preferable scheme, the high-temperature flue gas inlet 11 is arranged below the annular space outer cylinder 1; the high-temperature flue gas outlet 12 is arranged above the annular space outer cylinder 1.

According to the embodiment of the invention, referring to the attached figures 1-3, a heat exchange inner cylinder 2 is arranged on the inner side of an annular space outer cylinder 1, and an annular space is formed between the heat exchange inner cylinder 2 and the annular space outer cylinder 1. The heat exchange inner cylinder 2 can be rotatably arranged and comprises a feeding section 21, a pyrolysis section 22 and a discharging section 24 which are connected in sequence. The diameter of the feeding section 21 is smaller than that of the pyrolysis section 22, and the feeding section 21 extends out of one end of the annular outer cylinder 1, and one end of the discharging section 24 is contracted to form a discharging end along the direction far away from the feeding section 21. High-temperature flue gas gets into the annular space through high-temperature flue gas import 11, and the high-temperature flue gas in the annular space is right heat exchange inner tube 2 wall to material in the heat exchange inner tube 2 heats, takes place the pyrolysis after the material is heated to the uniform temperature, and the material after the pyrolysis is carried backward through ejection of compact section 24. In order to heat the materials uniformly, the heat exchange inner cylinder 2 can rotate, so that the materials roll in the heat exchange inner cylinder.

In some embodiments of the present invention, the inner wall of the pyrolysis section 22 is provided with a shovelling bucket 23, and the inner wall 24 of the discharge section is provided with a shovelling plate 25. The high-temperature flue gas in the annular gap heats the wall of the heat exchange inner cylinder 2, simultaneously, heat is conducted to the shoveling plate 25 and the shoveling bucket 23 through heat, and then materials in the heat exchange inner cylinder 2, the shoveling plate 25 and the shoveling bucket 23 perform sufficient heat exchange, so that the materials are heated and generate pyrolysis reaction. The shoveling bucket 23 is formed by welding steel plates, and can be used for shoveling materials in the shoveling bucket 23 when the inner cylinder rotates, so that the materials can rotate to the upper part along with the shoveling bucket, the heat exchange time of the materials is prolonged, and the heat conduction efficiency is improved. The side wall of the shoveling plate 25 is inclined at a certain angle, so that the material can be conveyed to the discharging end while being shoveled. The shovelling plates 25 enable the material to be moved upward while being continuously pushed backward by the screw. Furthermore, the length of the shoveling bucket 23 is 1/10-1/5 of the diameter of the pyrolysis section 22. From this, the material in the pyrolysis section carries out more abundant heat transfer with copying bucket. The length of the shovelling plate 25 is 1/10-1/5 of the diameter of the discharging section where the shovelling plate is located. Therefore, the material in the discharging section and the shoveling plate exchange heat more fully.

In some embodiments of the present invention, the junction of the feeding section 21 and one end of the annular gap outer cylinder 1 is sealed, and further, the junction of the feeding section 21 and one end of the annular gap outer cylinder 1 is sealed by a first sealing ring 31. From this, avoid the high temperature flue gas in the annular space to reveal from the junction, influence heating efficiency.

According to the embodiment of the invention, referring to fig. 1 and 2, the feeding screw conveyor 3 is connected with the inner side of the feeding section 21, and the joint of the feeding screw conveyor 3 and the feeding section 21 is sealed, so that the pyrolysis gas in the heat exchange inner cylinder 2 is prevented from leaking from the joint of the feeding screw conveyor 3 and the feeding section 21, and environmental pollution is avoided; meanwhile, the air is prevented from entering the heat exchange inner barrel 2 from the joint, and the danger of combustion and explosion is avoided. The material is first conveyed by the feed screw conveyor 3 to the front end of the inlet and then blocked at the inlet, as the material continues to enter and accumulate, the latter material will push the former material into the feed section 21 and thus into the pyrolysis section 22. It should be noted that the type of the sealing is not particularly limited, and those skilled in the art can select the sealing according to actual needs as long as the effect of preventing the pyrolysis gas in the heat exchange inner cylinder 2 from leaking from the joint can be achieved. Preferably, the feed screw conveyor 3 is sealed from the feed section 21 by a third sealing ring 31. It should be noted that the type of the feeding screw conveyor 3 is not particularly limited, and those skilled in the art can select the feeding screw conveyor according to actual needs as long as the feeding screw conveyor has a small diameter and can realize screw feeding.

In some embodiments of the invention, the flight tip of the feed screw conveyor 3 is 10-20cm from the vertical length of the pyrolysis section 21. Therefore, materials can be spirally accumulated at the inlet, so that pyrolysis gas cannot flow back to the outside of the equipment from the inside of the feeding spiral.

According to the embodiment of the invention, referring to the attached figures 1 and 2, a discharging spiral cylinder 4 is arranged, the discharging spiral cylinder 4 is connected with the discharging end 24, and the discharging spiral cylinder 4 extends out of the other end of the annular space outer cylinder 1. The discharging spiral cylinder 4 discharges the pyrolyzed materials through rotation. In some embodiments of the invention, the connection between the discharging spiral cylinder 4 and the other end of the annular space outer cylinder 1 is sealed. Further, the discharging spiral cylinder 4 and the annular gap outer cylinder 1 are sealed through a second sealing ring 14. From this, avoid the high temperature flue gas in the annular space to reveal from the junction, influence heating efficiency. Because the diameters of the feeding section 21 and the discharging section 24 are small, the places needing sealing are small, and therefore sealing is facilitated.

In some embodiments of the invention, the diameter of the discharge screw drum 4 is 1/10-1/5 of the diameter of the pyrolysis section 22, and the diameter of the feed section 21 is 1/5-1/4 of the diameter of the pyrolysis section 22. From this, the diameter of feeding section and ejection of compact spiral shell is all very little to reduce the sealed face of junction, make it sealed simpler, sealed effect is better.

In some embodiments of the invention, the inner wall of the discharge screw cylinder 4 is provided with continuous flights 41. The central channel is left inside the spiral sheet to enable pyrolysis gas to flow out to the feed box 5. Preferably, the length of the continuous spiral sheet 41 is 1/10-1/5 of the diameter of the discharging spiral cylinder 4. From this, ejection of compact spiral shell 4 can more conveniently push out ejection of compact spiral shell 4 with the material tie after the pyrolysis through the spiral.

It should be noted that the type of the discharging spiral cylinder 4 is not particularly limited, and those skilled in the art can select the discharging spiral cylinder according to actual needs as long as the discharging spiral cylinder has a small diameter and can realize spiral discharging.

According to the embodiment of the invention, referring to the attached

drawings

1 and 2, a discharge box 5 is arranged, the discharge box 5 is connected with the outer side of one end, far away from a feeding screw conveyor 3, of a discharge screw cylinder 4, and the connection part of the discharge box 5 and the discharge screw cylinder 4 is sealed, so that the pyrolysis gas in a heat exchange inner cylinder 2 is prevented from leaking from the connection part to cause environmental pollution; meanwhile, the danger of combustion and explosion caused by the fact that air enters the heat exchange inner barrel 2 from the joint is avoided. It should be noted that the type of the sealing is not particularly limited, and those skilled in the art can select the sealing according to actual needs as long as the effect of preventing the pyrolysis gas in the discharging box 5 from leaking from the connection point can be achieved. Preferably, the junction between the discharging box and the discharging spiral cylinder is sealed by a fourth sealing ring 53. The material after pyrolysis enters the discharging box 5 after being discharged from the discharging spiral cylinder 4. An air outlet 51 is arranged above the discharging box 5 and used for discharging pyrolysis gas; a discharge port 52 is arranged below the furnace body and used for discharging the pyrolyzed materials.

Further, referring to fig. 2, the pyrolysis apparatus further includes: a first support wheel 61, the first support wheel 61 being disposed below the feed section 21; a second support wheel 62, wherein the second support wheel 62 is arranged below the discharging spiral cylinder 4. The first support wheel 61 and the second support wheel 62 are used for supporting the heat exchange inner cylinder 2.

As described above, the drum pyrolysis apparatus according to the embodiment of the present invention has at least one of the following advantageous effects:

(1) according to the embodiment of the invention, the feeding of the roller pyrolysis machine is realized by the feeding screw conveyor, the discharging is realized by the discharging screw cylinder, and the feeding and the discharging are both realized by screws, so that the smooth feeding and discharging of materials are ensured. (2) The outer diameters of the feeding section and the discharging spiral cylinder are very small, so that the connecting sealing positions of the feeding section and the discharging spiral cylinder and the annular gap outer cylinder are also very small, and the sealing is convenient. (2) The diameters of the feeding screw conveyer and the discharging screw cylinder in the embodiment of the invention are very small, so that the sealing surface of the joint is reduced, the sealing is simpler, the sealing effect is better, and the pyrolysis gas in the heat exchange inner cylinder is prevented from leaking from the joint to cause environmental pollution; meanwhile, the air is prevented from entering the heat exchange inner barrel from the joint, and the danger of combustion and explosion is avoided, so that the safe and stable operation of the equipment is ensured. (3) The inner wall of the pyrolysis section is provided with the shoveling bucket, and the inner wall of the discharge section is provided with the shoveling plate, so that the heat exchange time of the material is prolonged, the material is fully subjected to heat exchange with the shoveling plate and the shoveling bucket, and the heat conduction efficiency is improved. (4) The end of the feeding screw is provided with a distance without a spiral piece, so that materials can be accumulated at the end, the requirement of material conveying is met, meanwhile, the pyrolysis gas is prevented from leaking outwards, and the operation safety is ensured.

In yet another aspect of the invention, a method of performing pyrolysis using the above-described roller pyrolysis machine is provided. According to an embodiment of the invention, referring to fig. 4, the method comprises:

s1: conveying the material into a feeding section through a feeding screw conveyor;

in this step, the material is first conveyed by the feed screw conveyor 3 to the front end of the inlet and then blocked at the inlet, with the latter material pushing the former material to the feed section 21 as it continues to enter and accumulate.

S2: the material is pushed into the pyrolysis section and the discharging section through a screw, so that the material is heated and pyrolysis reaction is generated;

in this step, the material is pushed by a screw from the feed section 21 into the pyrolysis section 22. High-temperature flue gas enters the annular space through the high-temperature flue gas inlet 11, and the high-temperature flue gas in the annular space heats the wall of the heat exchange inner cylinder 2, so that materials in the heat exchange inner cylinder 2 are heated. In order to heat the materials uniformly, the heat exchange inner cylinder 2 can rotate to roll the materials in the heat exchange inner cylinder, the materials are heated to a certain temperature and then pyrolyzed, and the pyrolyzed materials are conveyed backwards.

In some embodiments of the invention, the material is tumbled in the rotating inner drum to exchange heat with the side walls and the shoveling plates 25 and shoveling buckets 22 sufficiently to heat the material and cause pyrolysis. When the inner cylinder rotates, the material in the shoveling bucket 22 can be shoveled and rotated to the upper part along with the shoveling bucket, so that the heat exchange time of the material is prolonged, and the heat conduction efficiency is improved. The side wall of the shoveling bucket 22 inclines for a certain angle, so that the material can be conveyed to the discharging end while being shoveled. The final material is conveyed to the discharge section 24. The shoveling plate 25 arranged on the inner wall of the conical inclined cylinder can enable the material to move upwards while the spiral continuously advances backwards in the rotating process.

It should be noted that the temperature in the pyrolysis section is not particularly limited as long as the material in the pyrolysis section can be pyrolyzed.

S3: pushing the material pyrolyzed in the step S2 to a discharging spiral cylinder, and discharging the material from the discharging spiral cylinder;

in this step, the material pyrolyzed in step S2 is pushed from the discharging section 24 into the discharging screw barrel 4. The discharging spiral cylinder 4 can more conveniently push the pyrolyzed material out of the discharging spiral cylinder 4 through the spiral under the action of the continuous spiral sheet 41 arranged on the inner wall of the discharging spiral cylinder 4.

S4: and pushing the pyrolyzed material to a discharging box and discharging the material from the discharging box.

In this step, the pyrolyzed material is pushed into the discharging box 5 by the discharging spiral cylinder 4, the pyrolyzed fixed material is discharged from the discharging hole 52, and the pyrolysis gas is discharged from the gas outlet 51.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A roller pyrolysis machine, comprising:

2. The roller pyrolysis machine of claim 1, wherein a shovelling bucket is arranged on the inner wall of the pyrolysis section, and a shovelling plate is arranged on the inner wall of the discharge section;

optionally, the inner wall of the discharging spiral cylinder is provided with a continuous spiral sheet;

optionally, the length of the hopper is 1/10-1/5 of the diameter of the pyrolysis section;

optionally, the length of the shoveling plate is 1/10-1/5 of the diameter of the discharging section where the shoveling plate is located;

optionally, the length of the continuous flight is 1/10-1/5 of the diameter of the discharge screw barrel.

3. The roller pyrolysis machine of claim 1 wherein the diameter of the feed section is 1/5-1/4 of the diameter of the pyrolysis section and the diameter of the discharge screw is 1/10-1/5 of the diameter of the pyrolysis section.

4. The drum pyrolysis machine of claim 1 wherein the feed screw conveyor is sealed to the feed section by a third sealing ring;

optionally, the discharge box and the discharge screw cylinder are sealed by a fourth sealing ring.

5. The drum pyrolysis machine of claim 1 wherein the flight tips of the feed screw conveyor are 10-20cm from the vertical length of the pyrolysis section.

6. The roller pyrolysis machine of claim 1 wherein the junction of the feed section and one end of the annular outer drum is sealed, and the junction of the discharge screw drum and the other end of the annular outer drum is sealed;

optionally, the feeding section and one end of the annular space outer cylinder are sealed through a first sealing ring; and the discharging spiral cylinder and the other end of the annular space outer cylinder are sealed through a second sealing ring.

7. The roller pyrolysis machine of any one of claims 1 to 6 wherein the high temperature flue gas inlet is disposed below the annulus outer drum; the low-temperature flue gas outlet is arranged above the annular space outer cylinder;

optionally, the air outlet is arranged above the discharging box, and the discharging port is arranged below the discharging box.

8. The roller pyrolysis machine of any one of claims 1 to 6 further comprising:

the first supporting wheel is arranged below the feeding section;

and the second supporting wheel is arranged below the discharging spiral cylinder.

9. A method of pyrolysis using the drum pyrolysis machine of any one of claims 1 to 8, comprising:

10. The method according to claim 9, wherein in the step (2), the material is subjected to sufficient heat exchange with the shoveling hoppers on the inner wall of the pyrolysis section and shoveling plates in the discharging section, so that the material is heated and pyrolysis reaction is carried out.