A dry pyrolysis apparatus and method

Abstract

The application discloses a kind of dry pyrolysis equipment and method, it is related to pyrolysis technical field, including pyrolysis pipeline, feeding device, gas collecting device, discharging device, first cooling device, heating device and second cooling device, the number of pyrolysis pipeline is multiple, multiple pyrolysis pipeline is vertically arranged;The number of feeding device is multiple, and the upper section of each pyrolysis pipeline is equipped with feeding device, and feeding device is communicated with pyrolysis pipeline;Gas collecting device is arranged in the upper section of pyrolysis pipeline, and gas collecting device is communicated with pyrolysis pipeline;Discharging device is arranged in the lower section of pyrolysis pipeline, and discharging device is communicated with pyrolysis pipeline;Along the upper section to lower section of pyrolysis pipeline, first cooling device, heating device and second cooling device are sequentially provided, and gas collecting device is above first cooling device, and discharging device is below second cooling device.The dry pyrolysis equipment and method of the application can be maintained without stopping, and operation is more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the pyrolysis technical field, in particular to a drying pyrolysis equipment and method. BACKGROUND

[0002] The drying pyrolysis equipment refers to the equipment for producing gas, solid and other products by pyrolysis of organic matter in the material through high-temperature heating. The working principle is mainly based on chemical reaction under high-temperature conditions, so that the material is pyrolyzed under oxygen-deficient or oxygen-free conditions to generate small-molecule gas and solid residues.

[0003] The current drying pyrolysis equipment includes horizontal rotary kiln, horizontal screw propelling drying pyrolysis equipment and vertical furnace chamber, which are mostly one-way single-channel equipment. Once the main machine stops, the whole system stops immediately, and the equipment cannot be maintained online, which reduces the production efficiency and directly affects the production and operation plan of the factory. SUMMARY

[0004] The present application aims to solve at least one of the technical problems in the prior art. To this end, the present application provides a drying pyrolysis equipment which can be maintained without stopping and has more stable operation.

[0005] The present application also provides a drying pyrolysis method.

[0006] The drying pyrolysis equipment according to the first aspect of the present application comprises a plurality of pyrolysis pipelines, and the pyrolysis pipelines are vertically arranged;

[0007] A feeding device is arranged on the upper section of each pyrolysis pipeline, and the feeding device is in communication with the pyrolysis pipeline;

[0008] A gas collecting device is arranged on the upper section of the pyrolysis pipeline, and the gas collecting device is in communication with the pyrolysis pipeline;

[0009] A discharging device is arranged on the lower section of the pyrolysis pipeline, and the discharging device is in communication with the pyrolysis pipeline;

[0010] A first cooling device, a heat supply device and a second cooling device are sequentially arranged along the upper section to the lower section of the pyrolysis pipeline, and the gas collecting device is located above the first cooling device, and the discharging device is located below the second cooling device.

[0011] The dry pyrolysis device has at least the following beneficial effects: the dry pyrolysis device is provided with a plurality of pyrolysis pipes which are independent of each other, each pyrolysis pipe has an independent feeding device, so that the failure risk is shared, and when a single pyrolysis pipe needs to be repaired, the work of the remaining pyrolysis pipes will not be affected; the first cooling device is arranged at the upper section of the pyrolysis pipe and is used for cooling the gas generated by pyrolysis, and the first cooling device is also close to the feeding device, so that if the feeding device is blocked and needs to be repaired, the high temperature can also be avoided to cause harm to the repair personnel; the second cooling device is arranged at the lower section of the pyrolysis pipe and is used for cooling the non-gaseous products after pyrolysis, and the second cooling device is also close to the discharging device, so that if the discharging device is blocked and needs to be repaired, the high temperature can also be avoided to cause harm to the repair personnel.

[0012] According to some embodiments of the present application, the feeding device and the gas collecting device are both communicated to the side wall of the pyrolysis pipe, the port of the upper section of the pyrolysis pipe is provided with a dredging device, the dredging device extends into the interior of the pyrolysis pipe and can move along the axial direction of the pyrolysis pipe, and the dredging device is used for scraping the inner wall of the pyrolysis pipe.

[0013] According to some embodiments of the present application, the dredging device comprises a driving assembly and a dredging part, the driving assembly is arranged on the pyrolysis pipe, the dredging part is arranged in the interior of the pyrolysis pipe, the dredging part is connected with the driving assembly, and the driving assembly is used for driving the dredging part to move along the axial direction of the pyrolysis pipe.

[0014] According to some embodiments of the present application, the dredging part comprises a push rod, the push rod is in transmission connection with the driving assembly, the push rod is coaxially arranged with the pyrolysis pipe, and the driving assembly is used for driving the push rod to move along the axial direction of the pyrolysis pipe.

[0015] According to some embodiments of the present application, one end of the push rod away from the driving assembly is provided with a push plate, the push plate is perpendicular to the push rod, and the outer diameter of the push rod is smaller than the diameter of the push plate.

[0016] According to some embodiments of the present application, the dredging part comprises a first spiral, the first spiral is in transmission connection with the driving assembly, the first spiral is coaxially arranged with the pyrolysis pipe, and the driving assembly is used for driving the first spiral to rotate along the circumferential direction of the pyrolysis pipe and driving the first spiral to move along the axial direction of the pyrolysis pipe.

[0017] According to some embodiments of the present application, the feeding device comprises a feeding pipe, a first pushing pipe and a second screw, the first pushing pipe is in communication with the pyrolysis pipe, the feeding pipe is vertically arranged, the feeding pipe is arranged on the side wall of the first pushing pipe and in communication with the first pushing pipe, the second screw is arranged in the first pushing pipe and coaxial with the first pushing pipe, and the second screw is connected with a first driving motor.

[0018] According to some embodiments of the present application, the gas collecting device comprises a collecting pipe and a plurality of branch pipes, each of the pyrolysis pipes is in communication with one of the branch pipes, and the plurality of branch pipes are in communication with the collecting pipe.

[0019] According to some embodiments of the present application, the discharging device comprises a discharging pipe and a third screw, the third screw is arranged at the end of the lower section of the pyrolysis pipe and extends into the interior of the pyrolysis pipe, the discharging pipe is arranged on the side wall of the lower section of the pyrolysis pipe, the discharging pipe is in communication with the pyrolysis pipe, the spiral blade of the third screw starts from the end extending into the interior of the pyrolysis pipe and stops at the joint of the discharging pipe and the pyrolysis pipe, and the third screw is connected with a second driving motor.

[0020] According to some embodiments of the present application, the heating device comprises a plurality of heating pipes, the heating pipes are vertically arranged with the pyrolysis pipe, the pyrolysis pipe passes through the heating pipes, the plurality of heating pipes are arranged along the axial direction of the pyrolysis pipe, the end of one side of adjacent two heating pipes forms a communication part, and a plurality of communication parts are alternately distributed along the axial direction of the pyrolysis pipe, and the heating pipes are used for passing hot medium.

[0021] The drying and pyrolysis equipment according to the second aspect of the embodiments of the present application uses the drying and pyrolysis equipment described above, and performs drying and pyrolysis on the material by the following steps:

[0022] In step S1, the material is put into the feeding device, and the feeding device quantitatively delivers the material to the pyrolysis pipe.

[0023] In step S2, the heating device heats and warms the material to complete drying and pyrolysis, the solid product of pyrolysis moves towards the lower part of the pyrolysis pipe, and the gaseous product of pyrolysis moves towards the upper part of the pyrolysis pipe.

[0024] In step S3, the first cooling device cools the gaseous product, the gaseous product is collected from the gas collecting device, the second cooling device cools the non-gaseous product after pyrolysis, and the solid product is collected from the discharging device.

[0025] The drying and pyrolysis method according to the embodiments of the present application has at least the following beneficial effects: the first cooling device is used for cooling the gaseous product generated by pyrolysis, and the second cooling device is used for cooling the non-gaseous product after pyrolysis.

[0026] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0027] The present application will be further described with reference to the drawings and examples, wherein:

[0028] Figure 1 Structure diagram of the drying pyrolysis equipment of the embodiment of the present application;

[0029] Figure 2 Structure diagram of the drying pyrolysis equipment of the embodiment of the present application;

[0030] Figure 3 Structure diagram of the dredging device of the embodiment of the present application;

[0031] Figure 4 Structure diagram of the upper section of the pyrolysis pipeline of the embodiment of the present application;

[0032] Figure 5 Structure diagram of the lower section of the pyrolysis pipeline of the embodiment of the present application.

[0033] LIST OF REFERENCE NUMERALS

[0034] Pyrolysis pipeline 100, feeding device 200, feeding pipe 210, first pushing pipe 220, second screw 230, gas collecting device 300, converging pipe 310, branch pipe 320, discharging device 400, discharging pipe 410, third screw 420, first cooling device 500, heat supplying device 600, heat supplying pipeline 610, second cooling device 700, dredging device 800, driving assembly 810, dredging part 820, pushing rod 821, pushing plate 822. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation to the present application.

[0036] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0037] In the description of the present application, more refers to more than two. If the first, second is described for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0038] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installation, connection, etc. should be understood broadly, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0039] The dry pyrolysis equipment refers to the equipment for producing gas, solid and other products by pyrolysis of organic matter in the material through high temperature heating. Its working principle is mainly based on chemical reaction under high temperature conditions, so that the material is pyrolyzed under oxygen deficiency or oxygen-free conditions to generate small molecule gas and solid residue.

[0040] The current dry pyrolysis equipment includes horizontal rotary kiln, horizontal screw propelling dry pyrolysis equipment and vertical hearth, which are mostly one-way single-channel equipment. Once the main machine stops, the whole system will stop immediately, which cannot be online maintenance, reduces the production efficiency and directly affects the production and operation plan of the factory. The faults of the dry pyrolysis equipment mostly occur at the feeding and discharging positions. When the feeding or discharging structure of the above-mentioned one-way single-channel equipment fails, it will not continue to work.

[0041] Referring to Figure 1 and Figure 2 , the dry pyrolysis equipment of one embodiment of the present application includes a pyrolysis pipeline 100, a feeding device 200, a gas collecting device 300, a discharging device 400, a first cooling device 500, a heat supply device 600 and a second cooling device 700.

[0042] The number of the pyrolysis pipeline 100 is multiple, and the multiple pyrolysis pipelines 100 are vertically arranged. The number of the feeding device 200 is multiple, and each upper section of the pyrolysis pipeline 100 is provided with the feeding device 200, and the feeding device 200 is communicated with the pyrolysis pipeline 100.

[0043] The gas collecting device 300 is arranged at the upper section of the pyrolysis pipeline 100, and the gas collecting device 300 is communicated with the pyrolysis pipeline 100. The discharging device 400 is arranged at the lower section of the pyrolysis pipeline 100, and the discharging device 400 is communicated with the pyrolysis pipeline 100.

[0044] The first cooling device 500, the heat supply device 600 and the second cooling device 700 are sequentially arranged along the upper section to the lower section of the pyrolysis pipeline 100, and the gas collecting device 300 is located above the first cooling device 500, and the discharging device 400 is located below the second cooling device 700.

[0045] The material is put into the feeding device 200, and the feeding device 200 quantitatively sends the material into the pyrolysis pipeline 100. The pyrolysis pipeline 100 is vertically arranged, and the material naturally falls in the pyrolysis pipeline 100 under the action of gravity. In the process of falling, the material successively passes through the first cooling device 500 and the heating device 600. The first cooling device 500 is used to cool the gas generated by pyrolysis to a lower temperature, and the material is also put into the pyrolysis pipeline 100 at room temperature, so the influence of the first cooling device 500 on the material can be ignored. When the material continues to move downward, it passes through the heating device 600, and the heating device 600 continuously heats the material to make it reach the pyrolysis temperature for pyrolysis reaction. The gas generated by pyrolysis moves upward, and the gas passes through the first cooling device 500 to reduce the temperature to a lower temperature, and then passes through the gas collecting device 300 to collect and utilize. After the gas generated by pyrolysis is treated by the processes such as temperature reduction, condensation and separation, various products such as non-condensable gas, pyrolysis oil and pyrolysis water can be formed, and each product can be reused, which has high economic benefits. The non-gaseous products generated after pyrolysis continue to move downward along the pyrolysis pipeline 100, are cooled to a lower temperature by the second cooling device 700, and are finally collected by the discharging device 400.

[0046] It should be understood that when the first cooling device 500 cools the gas, the cooling temperature is controlled at about 100°C or above, so as to ensure that the water vapor in the gas will not condense in the equipment.

[0047] It should be understood that when the material is accumulated in the pyrolysis pipeline 100 to a certain extent, the feeding device 200 needs to extrude the material into the pyrolysis pipeline 100 to further push the material in the pyrolysis pipeline 100 downward, so the feeding device 200 preferably uses a spiral feeding mode.

[0048] When one of the pyrolysis pipelines 100 fails or needs to be repaired for other reasons, the work of the entire drying and pyrolysis equipment does not need to be stopped, and the remaining pyrolysis pipelines 100 can continue to carry out pyrolysis reaction. Only the feeding device 200 of the pyrolysis pipeline 100 to be repaired needs to be stopped, and the repair work of the pyrolysis pipeline 100 can be carried out. It should be understood that the passage of the pyrolysis pipeline 100 to the gas collecting device 300 can be cut off, and the passage to the discharging device 400 can also be cut off.

[0049] It should be understood that the failure of the pyrolysis pipeline 100 generally includes feed blockage or discharge blockage. The feed blockage often occurs near the feed device 200, which is close to the first cooling device 500 and is located in the upper section of the pyrolysis pipeline 100. The first cooling device 500 can isolate the heat of the heating device 600 and reduce the high temperature to cause harm to the maintenance personnel. The discharge blockage often occurs near the discharge device 400, which is close to the second cooling device 700 and is located in the lower section of the pyrolysis pipeline 100. The second cooling device 700 can also isolate the heat of the heating device 600 and reduce the high temperature to cause harm to the maintenance personnel.

[0050] It should be understood that the feed device 200 and the gas collection device 300 are both connected to the side wall of the pyrolysis pipeline 100. The port of the upper section of the pyrolysis pipeline 100 is provided with a dredging device 800. The dredging device 800 extends into the interior of the pyrolysis pipeline 100 and can move along the axial direction of the pyrolysis pipeline 100. The dredging device 800 is used to scrape the inner wall of the pyrolysis pipeline 100.

[0051] Further, in order to reduce the failure risk of the pyrolysis pipeline 100 and improve the stability of the operation of the dry pyrolysis equipment, the dredging device 800 is arranged to clean the blocked material in the interior of the pyrolysis pipeline 100 and break the coking attached to the inner wall of the pyrolysis pipeline 100. The port of the pyrolysis pipeline 100 is provided with the dredging device 800. The dredging device 800 can be selected as a push rod type or a spiral type. The push rod type dredging device 800 only needs to move along the axial direction of the pyrolysis pipeline 100, so as to clean the blocked material and break the coking on the inner wall.

[0052] Referring to Figure 3 It should be understood that the dredging device 800 includes a driving assembly 810 and a dredging part 820. The driving assembly 810 is arranged on the pyrolysis pipeline 100. The dredging part 820 is arranged in the interior of the pyrolysis pipeline 100. The dredging part 820 is connected with the driving assembly 810. The driving assembly 810 is used to drive the dredging part 820 to move along the axial direction of the pyrolysis pipeline 100.

[0053] The driving assembly 810 can be a pneumatic driving assembly. Different driving assemblies 810 can be selected for different types of dredging parts 820.

[0054] For example, it should be understood that the dredging part 820 includes a push rod 821. The push rod 821 is in transmission connection with the driving assembly 810. The push rod 821 is coaxially arranged with the pyrolysis pipeline 100. The driving assembly 810 is used to drive the push rod 821 to move along the axial direction of the pyrolysis pipeline 100.

[0055] In the above structure, the driving assembly 810 can be a driving cylinder, which drives the push rod 821 to move linearly. The diameter of the push rod 821 is close to the inner diameter of the pyrolysis pipeline 100, and the diameter of the push rod 821 is ensured to be smaller than the inner diameter of the pyrolysis pipeline 100. When the push rod 821 moves axially in the pyrolysis pipeline 100, the end face of the push rod 821 pushes the blocked material, and the end edge can also scrape and remove the coking attached to the inner wall of the pyrolysis pipeline 100. Of course, in order to reduce the scratching of the push rod 821 to the inner wall of the pyrolysis pipeline 100 as much as possible, a guide bracket can also be arranged on the pyrolysis pipeline 100 to ensure that the push rod 821 is coaxial with the pyrolysis pipeline 100 and moves axially. It should be understood that the scratching of the push rod 821 to the inner wall of the pyrolysis pipeline 100 refers to damaging the inner wall of the pyrolysis pipeline 100, rather than just scraping the attached material on the inner wall.

[0056] It can be understood that the end of the push rod 821 away from the driving assembly 810 is provided with a push plate 822, the push plate 822 is perpendicular to the push rod 821, and the outer diameter of the push rod 821 is smaller than the diameter of the push plate 822.

[0057] The push plate 822 is used to push the accumulated material and scrape and remove the coking on the inner wall of the pyrolysis pipeline 100. Therefore, the diameter of the push plate 822 is slightly smaller than the inner diameter of the pyrolysis pipeline 100. At the same time, the outer diameter of the push rod 821 can be smaller than the diameter of the push plate 822, so as to reduce the mass of the push rod 821 as much as possible and reduce the burden of the driving assembly 810.

[0058] It can be understood that the dredging part 820 includes a first spiral, the first spiral is in transmission connection with the driving assembly 810, the first spiral is arranged coaxially with the pyrolysis pipeline 100, and the driving assembly 810 is used to drive the first spiral to rotate along the circumference of the pyrolysis pipeline 100 and to move axially along the pyrolysis pipeline 100.

[0059] Another structure of the dredging part 820 is to adopt a spiral pushing mode. At this time, the driving assembly 810 is composed of at least two groups of driving members, which respectively provide rotary driving and linear driving to realize the rotation of the first spiral and the axial movement of the first spiral in the pyrolysis pipeline 100. It should be understood that when the dredging device 800 is not working, the default state of the dredging part 820 is to stay at the uppermost position to leave space for the flow of pyrolysis gas.

[0060] Referring to Figure 4As shown, it can be understood that when the feeding device 200 adopts the spiral feeding mode, the feeding device 200 comprises a feeding pipe 210, a first pushing pipe 220 and a second spiral 230, the first pushing pipe 220 is communicated with the pyrolysis pipeline 100, the feeding pipe 210 is vertically arranged, the feeding pipe 210 is arranged on the side wall of the first pushing pipe 220 and communicated with the first pushing pipe 220, the second spiral 230 is arranged in the first pushing pipe 220 and coaxial with the first pushing pipe 220, and the second spiral 230 is connected with a first driving motor.

[0061] The first driving motor drives the second spiral 230 to rotate, so as to introduce the material in the feeding pipe 210 into the first pushing pipe 220, and push the material in the first pushing pipe 220 into the pyrolysis pipeline 100. The material in the pyrolysis pipeline 100 is continuously supplemented by the first pushing pipe 220, and continues to move downwards along the pyrolysis pipeline 100 by mutual extrusion, until moving to the heating device 600 for pyrolysis reaction.

[0062] It can be understood that the gas collecting device 300 comprises a collecting pipe 310 and a plurality of branch pipes 320, each pyrolysis pipeline 100 is communicated with a branch pipe 320, and the plurality of branch pipes 320 are communicated with the collecting pipe 310.

[0063] The independent branch pipe 320 is communicated with the pyrolysis pipeline 100, when the pyrolysis pipeline 100 needs to be overhauled, the branch pipe 320 communicated with the pyrolysis pipeline 100 can be closed, so as to separate the pyrolysis pipeline 100 from the gas collecting device 300. It needs to be understood that in order to achieve the closing of the branch pipe 320, a valve can be arranged on the branch pipe 320, and the method is not limited to this.

[0064] Referring to Figure 5 As shown, it can be understood that the discharging device 400 can also adopt the spiral conveying structure, the discharging device 400 comprises a discharging pipe 410 and a third spiral 420, the third spiral 420 is arranged at the end of the lower segment of the pyrolysis pipeline 100, and extends into the interior of the pyrolysis pipeline 100, the discharging pipe 410 is arranged on the side wall of the lower segment of the pyrolysis pipeline 100, the discharging pipe 410 is communicated with the pyrolysis pipeline 100, the spiral blade of the third spiral 420 starts from the end extending into the interior of the pyrolysis pipeline 100, and stops at the joint of the discharging pipe 410 and the pyrolysis pipeline 100, and the third spiral 420 is connected with a second driving motor.

[0065] The third spiral 420 is coaxial with the pyrolysis pipe 100 and directly receives the pyrolysis products from the lower section of the pyrolysis pipe 100. It should be understood that, in order to ensure that the pyrolysis products can be sufficiently cooled by the second cooling device 700, the extending portion of the third spiral 420 does not extend upward into the section of the pyrolysis pipe 100 where the second cooling device 700 is located. Only after the pyrolysis products have passed through the section of the pyrolysis pipe 100 where the second cooling device 700 is located, the pyrolysis products are pushed into the discharge pipe 410 by the third spiral 420.

[0066] It should be understood that the spiral blades of the third spiral 420 extend from the end extending into the interior of the pyrolysis pipe 100 to the junction of the discharge pipe 410 and the pyrolysis pipe 100, i.e. the spiral blades of the third spiral 420 extend from top to bottom to the junction of the discharge pipe 410 and the pyrolysis pipe 100. The pyrolysis products cannot continue to move downward and can only enter the discharge pipe 410 from the junction and be continuously extruded.

[0067] Preferably, the discharge pipe 410 can be connected to a collecting hopper. The collecting hopper is placed below the discharge pipe 410, and the opening of the collecting hopper faces the opening of the discharge pipe 410.

[0068] It should be understood that the heating device 600 includes a plurality of heating pipes 610, the heating pipes 610 are arranged perpendicularly to the pyrolysis pipe 100, and the pyrolysis pipe 100 passes through the heating pipes 610. The plurality of heating pipes 610 are arranged along the axial direction of the pyrolysis pipe 100. The end portions of the adjacent two heating pipes 610 on one side form a communication portion. The plurality of communication portions are alternately arranged along the axial direction of the pyrolysis pipe 100. The heating pipes 610 are used to pass a hot medium.

[0069] The plurality of heating pipes 610 form a return channel through the above arrangement to prolong the contact time of the hot medium with the pyrolysis pipe 100. The hot medium passing through the heating pipes 610 can be hot flue gas, steam, hot air, heat-conducting oil, etc. The temperature of the heating is generally in the range of 250-800°C, which can be further subdivided according to the type of the material to be pyrolyzed and the process requirements. Preferably, the hot medium enters from the lower heating pipes 610 and exits from the upper heating pipes 610 to complete the heat exchange. It should be understood that, during pyrolysis, water vapor passing through the heating pipes 610 cannot reach the required temperature for pyrolysis, so water vapor cannot be used. However, the vapor of other substances can be used as long as the temperature of the vapor of the substance in the vapor state can meet the required temperature for pyrolysis.

[0070] It should be understood that the first cooling device 500 and the second cooling device 700 can adopt the same or similar structure. For example, the first cooling device 500 is a cooling pipe into which a cooling medium is introduced, and the cooling medium is in contact with the pyrolysis pipe 100 to cool the part. The cooling pipe is perpendicular to the pyrolysis pipe 100, and the pyrolysis pipe 100 passes through the cooling pipe. In this structure, the cooling medium introduced into the cooling pipe can be in contact with the outer surface of the pyrolysis pipe 100 to exchange heat.

[0071] The drying pyrolysis method of one embodiment of the present application uses the drying pyrolysis device described above, and the drying pyrolysis of the material is carried out by the following steps:

[0072] Step S1, the material is put into the feeding device, and the material is quantitatively transported to the pyrolysis pipe through the feeding device;

[0073] Step S2, the heating device heats and warms up the material to complete the drying pyrolysis, and the solid product of pyrolysis moves towards the lower part of the pyrolysis pipe, and the gaseous product of pyrolysis moves towards the upper part of the pyrolysis pipe;

[0074] Step S3, the first cooling device cools the gaseous product, and the gaseous product is collected from the gas collecting device, and the second cooling device cools the solid product, and the solid product is collected from the discharging device.

[0075] According to the drying pyrolysis method of the embodiment of the present application, at least the following beneficial effects are obtained: the first cooling device is used to cool the gaseous product of pyrolysis; and the second cooling device is used to cool the non-gaseous product after pyrolysis.

[0076] Further, if the drying pyrolysis device is also provided with a dredging device, step S4 is included, and the upper part of the pyrolysis pipe is periodically dredged by using the dredging device to remove the coking material inside the pyrolysis pipe.

[0077] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the present application.

Claims

1. A dry pyrolysis apparatus, characterized by, The application relates to a pyrolysis pipeline device. The pyrolysis pipeline device comprises: a plurality of pyrolysis pipelines (100) vertically arranged; a plurality of feeding devices (200) in communication with the pyrolysis pipelines (100); a gas collecting device (300) arranged at the upper section of the pyrolysis pipeline (100) and in communication with the pyrolysis pipeline (100); a discharging device (400) arranged at the lower section of the pyrolysis pipeline (100) and in communication with the pyrolysis pipeline (100); a first cooling device (500), a heat supply device (600) and a second cooling device (700) arranged in sequence along the upper section to the lower section of the pyrolysis pipeline (100), wherein the gas collecting device (300) is arranged above the first cooling device (500) and the discharging device (400) is arranged below the second cooling device (700); the feeding device (200) and the gas collecting device (300) are in communication with the side wall of the pyrolysis pipeline (100), the port of the upper section of the pyrolysis pipeline (100) is provided with a dredging device (800) which extends into the interior of the pyrolysis pipeline (100) and can move along the axial direction of the pyrolysis pipeline (100), the dredging device (800) is used for scraping the inner wall of the pyrolysis pipeline (100), the dredging device (800) comprises a driving assembly (810) and a dredging part (820), the driving assembly (810) is arranged on the pyrolysis pipeline (100), the dredging part (820) is arranged in the interior of the pyrolysis pipeline (100), the dredging part (820) is connected with the driving assembly (810), and the driving assembly (810) is used for driving the dredging part (820) to move along the axial direction of the pyrolysis pipeline (100); wherein the dredging part (820) comprises a push rod (821) in transmission connection with the driving assembly (810), the push rod (821) is coaxially arranged with the pyrolysis pipeline (100), the driving assembly (810) is used for driving the push rod (821) to move along the axial direction of the pyrolysis pipeline (100), one end of the push rod (821) away from the driving assembly (810) is provided with a push plate (822), the push plate (822) is perpendicular to the push rod (821), and the outer diameter of the push rod (821) is smaller than the diameter of the push plate (822); or ​ The dredging part (820) comprises a first screw, the first screw is in transmission connection with the driving assembly (810), the first screw is coaxially arranged with the pyrolysis pipeline (100), and the driving assembly (810) is used for driving the first screw to rotate along the circumference of the pyrolysis pipeline (100) and to push the first screw to move along the axis of the pyrolysis pipeline (100).

2. The dry pyrolysis apparatus of claim 1, wherein, The feeding device (200) comprises a feeding pipe (210), a first pushing pipe (220) and a second screw (230), the first pushing pipe (220) is in communication with the pyrolysis pipeline (100), the feeding pipe (210) is vertically arranged, the feeding pipe (210) is arranged on the side wall of the first pushing pipe (220) and is in communication with the first pushing pipe (220), and the second screw (230) is arranged in the first pushing pipe (220) and is coaxial with the first pushing pipe (220), and the second screw (230) is connected with a first driving motor.

3. The dry pyrolysis apparatus of claim 1, wherein, The discharging device (400) comprises a discharging pipe (410) and a third screw (420), the third screw (420) is arranged at the end of the lower section of the pyrolysis pipeline (100) and extends into the interior of the pyrolysis pipeline (100), the discharging pipe (410) is arranged on the side wall of the lower section of the pyrolysis pipeline (100), the discharging pipe (410) is in communication with the pyrolysis pipeline (100), the helical blade of the third screw (420) starts from the end extending into the interior of the pyrolysis pipeline (100) and stops at the joint of the discharging pipe (410) and the pyrolysis pipeline (100), and the third screw (420) is connected with a second driving motor.

4. The dry pyrolysis apparatus of claim 1, wherein, The heat supply device (600) comprises a plurality of heat supply pipelines (610), the heat supply pipelines (610) are vertically arranged with the pyrolysis pipeline (100), and the pyrolysis pipeline (100) passes through the heat supply pipelines (610), the plurality of heat supply pipelines (610) are arranged along the axis of the pyrolysis pipeline (100), the ends of the sides of two adjacent heat supply pipelines (610) form a communication part, and a plurality of communication parts are alternately distributed along the axis of the pyrolysis pipeline (100), and the heat supply pipelines (610) are used for passing hot medium.

5. A dry pyrolysis process characterized by, The dry pyrolysis equipment of any one of claims 1-4 is used, and the material is dry pyrolyzed by the following steps: In step S1, the material is put into the feeding device, and the feeding device quantitatively delivers the material to the pyrolysis pipeline; In step S2, the heat supply device heats and warms the material to complete dry pyrolysis, the solid product of pyrolysis moves towards the lower part of the pyrolysis pipeline, and the gas product of pyrolysis moves towards the upper part of the pyrolysis pipeline; In step S3, the first cooling device cools the gas product, the gas product is collected from the gas collecting device, and the second cooling device cools the solid product, and the solid product is collected from the discharging device.

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