CN212357143U - Closed loop type internal circulation moving bed cracking device - Google Patents
Closed loop type internal circulation moving bed cracking device Download PDFInfo
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- CN212357143U CN212357143U CN202021872479.5U CN202021872479U CN212357143U CN 212357143 U CN212357143 U CN 212357143U CN 202021872479 U CN202021872479 U CN 202021872479U CN 212357143 U CN212357143 U CN 212357143U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a closed loop type internal circulation removes bed cracker. The device comprises the following components: the cracking cylinders are provided with N natural numbers, the spiral material pushers are arranged in the cracking cylinders, the cracking cylinders are sequentially detachably connected end to end, one cracking cylinder is a first-section cracking cylinder, the rest cracking cylinders are a second-section cracking cylinder, a third-section cracking cylinder, … …, an N-1-section cracking cylinder and an N-section cracking cylinder, and a certain amount of heating bodies are arranged in each cracking cylinder; the spiral material pushing device of the cracking cylinder is driven by a speed reducing and changing motor which is arranged outside the heating furnace and is connected with an end flange and can adjust the rotating speed; a heating mechanism; a feeder in communication with the feed end of the first section of the cracker cylinder; at least one of the first-section cracking cylinder to the N-section cracking cylinder is provided with a cracking gas outlet channel and is connected with a double-air-inlet high-temperature cyclone separator; in the cracking cylinder close to the rear end in the first section of cracking cylinder to the N sections of cracking cylinders, an opening is formed below at least one cracking cylinder, and a slag discharging mechanism is axially arranged at the opening part.
Description
Technical Field
The utility model relates to a thermal cracking technology field, concretely relates to closed loop type inner loop removes bed cracker.
Background
The high-value recycling of high molecular wastes such as waste plastic products, waste acrylic products, waste rubber products, waste chemical fiber fabrics and the like generally adopts a thermal cracking technology as an early-stage treatment means at present. The existing continuous moving bed cracking devices have the problems of poor heat transfer efficiency, low pyrolysis speed, discharge of individual materials after pyrolysis when the components of the materials are mixed, poor comprehensive adaptability for treating different materials and the like.
The utility model aims at solving the technical problem and providing a cracking device with stronger comprehensive adaptability when being suitable for continuous, large-scale and high-efficiency treatment of polymer waste and the mixing of different materials.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to solve the defects of the prior art and provide a closed loop type internal circulation moving bed cracking device for polymer wastes. The device has two functions of barrel heating and heating by a heating body in an extrusion manner, and the closed-loop internal circulation function can be used for recycling and cracking the materials, namely, the materials which are not cracked in the first circulation can enter the second circulation to be cracked continuously until the cracking is completed. The heating body has the heating and crushing functions, and the heating capacity of the material to be pyrolyzed is more uniform and efficient. The utility model discloses a cracker has the controllability to material moving speed and cracking temperature, and comprehensive adaptability when handling different materials is stronger, can realize the scale schizolysis processing to different kind of polymer discarded object.
The second objective of the present invention is to provide a working method of the closed-loop internal circulation moving bed cracking device for polymer waste.
The utility model provides a technical scheme that its technical problem adopted is:
a closed loop type internal circulation moving bed cracking device is characterized by comprising the following components:
the cracking cylinder is provided with N, N is more than three natural numbers, spiral material pushers are arranged in the cracking cylinders, the cracking cylinders are sequentially detachably connected end to form a closed and communicated annular cracking cylinder assembly, one cracking cylinder is a section of cracking cylinder, the rest cracking cylinders are a section of two-section cracking cylinder, a section of three-section cracking cylinder, … …, an N-1 section of cracking cylinder and an N section of cracking cylinder, and a certain amount of heating body is arranged in each cracking cylinder;
the spiral material pushers of the two-section cracking cylinder, the three-section cracking cylinder, the … …, the N-1 section cracking cylinder and the N section cracking cylinder are all driven by a speed reduction and change motor which is arranged outside the heating furnace and is connected with an end flange and can adjust the rotating speed;
the heating mechanism is used for heating the cracking barrel assembly;
the feeder is communicated with the feeding end of the first section of cracking cylinder, the spiral pusher of the first section of cracking cylinder extends through the cavity of the feeder, the shaft end of the spiral pusher is further extended, and the spiral pusher is connected with an external driving motor for driving feeding and pushing;
at least one of the first-section cracking cylinder to the N-section cracking cylinder is provided with a cracking gas outlet channel, and the cracking gas outlet channel is connected with a double-gas-inlet high-temperature cyclone separator;
in the cracking cylinder close to the rear end in the first section of cracking cylinder to the N sections of cracking cylinders, an opening is formed below at least one cracking cylinder, and a slag discharging mechanism is axially arranged at the opening part.
Preferably, the device also comprises a heating furnace, wherein the heating furnace is provided with a cavity, the cracking cylinder assembly is horizontally arranged in the cavity of the heating furnace, the heating mechanism is positioned under the cracking cylinder assembly, and the heating mechanism adopts electric heating or hot air heating.
Preferably, the slag discharge mechanism is configured to: the opening part is axially provided with a separating screen, and the clearance of the separating screen can prevent the heating body from passing through but can pass through the powder slag of the cracked material; the opening part is also provided with a slag powder outlet pipeline which is connected with the cracking cylinder in a sealing way, and the slag powder outlet pipeline is led out from the bottom of the heating furnace.
Preferably, the separating screen is a plurality of bars spaced apart from each other.
Preferably, N is four, the first section of cracking cylinder and the third section of cracking cylinder are provided with cracked gas outlet channels, and the slag discharging mechanism is arranged on the four sections of cracking cylinders.
More preferably, the cracking cylinders are sequentially connected end to end through flanges, the adjacent cracking cylinders are arranged at an angle of 90 degrees, and the combination of the cracking cylinders is square or rectangular.
Preferably, the heating mechanism adopts hot air heating and comprises an annular hot air channel distributed below the cracking cylinder assembly, an inlet of the hot air channel is communicated with an outlet of a burner, a plurality of hot air outlets are formed in the top of the hot air channel, the burner provides heat to heat air by burning fuel, the air is conveyed into the hot air channel, and the cracking cylinder is heated through the hot air outlets; the combustor is any one of a fuel combustor, a gas combustor, a dual-fuel combustor and a biomass combustor.
Preferably, the output end of the feeder is provided with a compression section through which the auger of a section of the cracker cartridge extends.
Preferably, the heating body is spherical. The spherical heating body has good fluidity and good extrusion, grinding and crushing effects.
A working method of a closed loop type internal circulation moving bed cracking device comprises the following steps:
s1, putting a proper amount of heating balls from the feeder, entering the cracking cylinder through the compression section, and moving the heating balls along the first section cracking cylinder, the second section cracking cylinder, the third section cracking cylinder, … …, N-1 section cracking cylinder and N section cracking cylinder under the push of the screw feeder and basically and uniformly distributing the heating balls into each section cracking cylinder;
s2: when heating, hot air upwards heats each section of cracking cylinder through a hot air outlet and simultaneously heats the heating balls to the process temperature through the wall of the cracking cylinder;
s3: after the materials enter the feeder, the materials are compressed and compacted at a compression section of the feeder to avoid bringing air and preventing pyrolysis gas from flowing back, after the materials enter a section of cracking cylinder through the compression section, the materials start to be loose and are mixed with the heating ball, the materials are stirred and crushed by a screw pusher, and are heated to a process temperature by the cracking cylinder and the heating ball in the continuous moving process of pushing the materials and the heating ball, the materials start to be cracked gradually, cracked gas enters a double-air-inlet high-temperature cyclone separator through a pyrolysis gas outlet to separate dust carried by the pyrolysis gas, the pyrolysis gas enters the next process, and the dust is discharged to a subsequent process through a second slag outlet of the double-air-inlet high-temperature cyclone separator;
s4: the materials are basically cracked when passing through the two-section cracking cylinder, the three-section cracking cylinder, … …, the N-1 section cracking cylinder and the N section cracking cylinder within the set process time, slag powder is discharged through a slag discharging mechanism when passing through a separating screen, individual large materials which are not cracked and heating balls cannot pass through the slag discharging mechanism, and the large materials are pushed to the first section cracking cylinder by a spiral pusher to be mixed with new materials, and then the large materials enter a second internal circulation until all the materials are cracked.
The utility model has the advantages that: the closed-loop internal circulation structure can perform continuous operation and can perform secondary cracking on part of the difficult-to-crack materials in the circulation process, so that the efficiency of the device is enhanced; the heating ball which is recycled in the device can heat and crush the materials, so that the cracking efficiency of the cracking device can be greatly improved; the adjustability of the material moving speed and the heating temperature ensures that the cracking device can adapt to the cracking conditions of various high polymer wastes, thereby enlarging the application range of the cracking device.
Drawings
FIG. 1 is a side view of the structure of the present invention;
fig. 2 is a top view structural diagram of the present invention.
In the drawings: 1. the device comprises a feeder, a compression section, a heating furnace, a hot air exhaust pipe, a double-air-inlet high-temperature cyclone separator, a spiral material pusher, a cracking cylinder, a separating sieve, a first slag outlet, a heating ball, a second slag outlet, a hot air duct, a burner, a four-section cracking cylinder driving motor, an exhaust branch pipe, a three-section cracking cylinder, a 17 three-section cracking cylinder driving motor, a 18 one-section cracking cylinder driving motor, a 19 four-section cracking cylinder, a heat insulation layer, a 21 one-section cracking cylinder, a 22 two-section cracking cylinder driving motor and a 23 two-section cracking cylinder, wherein the feeding section is arranged in the compression section, the heating furnace is arranged in the heating furnace, the hot air exhaust pipe is arranged in the hot air duct, the double-inlet high-temperature cyclone separator.
Detailed Description
The technical solution of the present invention will be further explained and explained with reference to the accompanying drawings.
A closed loop internal circulation moving bed cracking unit, comprising the following components:
the cracking cylinders are provided with four cracking cylinders, spiral material pushers 6 are arranged in the cracking cylinders, the cracking cylinders are sequentially detachably connected end to form a closed annular cracking cylinder assembly, one cracking cylinder is a first-section cracking cylinder 21, the rest cracking cylinders are a second-section cracking cylinder 23, a third-section cracking cylinder 16 and a fourth-section cracking cylinder 19, and a certain amount of heating bodies are arranged in each cracking cylinder;
the spiral material pushing devices 6 of the two-section cracking cylinder 23, the three-section cracking cylinder 16 and the four-section cracking cylinder 19 are driven by a speed reducing or changing motor which is arranged outside the heating furnace 3 and is connected with an end flange and can adjust the rotating speed, and the speed reducing or changing motor corresponds to a two-section cracking cylinder driving motor 18, a three-section cracking cylinder driving motor 17 and a four-section cracking cylinder driving motor 14 respectively;
the heating furnace 3 is provided with a cavity, and the cracking cylinder assembly is horizontally arranged in the cavity of the heating furnace 3;
the heating mechanism is arranged in the heating furnace 3, is positioned right below the cracking cylinder assembly and is used for heating the cracking cylinder assembly;
the feeder 1 is communicated with the feeding end of a section of cracking cylinder 21, the spiral pusher 6 of the section of cracking cylinder 21 extends into the cavity of the feeder 1, the shaft end of the spiral pusher is further extended, and the spiral pusher is connected with an external section of cracking cylinder driving motor 18 for driving feeding and pushing;
pyrolysis gas outlet channels are respectively arranged above the middle parts of the first-section pyrolysis cylinder 21 and the third-section pyrolysis cylinder 16, the pyrolysis gas outlet channels are respectively connected with the double-gas-inlet high-temperature cyclone separator 5, and the double-gas-inlet high-temperature cyclone separator 5 is provided with a second slag outlet 11;
the lower part of the middle part of the four-section cracking cylinder 19 is provided with an opening, the opening part is provided with a plurality of grid bars which are spaced from each other along the axial direction, and gaps among the grid bars can prevent a heating body (a heating ball 10) from passing through and can pass through powder slag of the cracked materials;
the opening part of the four-section cracking cylinder 19 is also provided with a slag powder outlet pipeline which is hermetically connected with the cracking cylinder 19, and the slag powder outlet pipeline is led out from the bottom of the heating furnace, in particular to the first slag 9.
The utility model discloses in, the schizolysis section of thick bamboo is end to end flange joint in proper order, and adjacent schizolysis section of thick bamboo is 90 angle settings, and the schizolysis section of thick bamboo assembly is square or rectangle, and the rectangle is adopted to this embodiment.
In the utility model, the heating mechanism comprises an air duct 12 with a plurality of hot air outlets distributed below the cracking cylinder assembly, the inlet of the hot air duct 12 is communicated with the outlet of the burner 13, the burner 13 provides heat heating air by burning fuel, the heat heating air is conveyed into the hot air duct 12 and heats the cracking cylinder through the outlet, and the heated air after being cooled is collected to the hot air exhaust pipe 4 for exhaust through the exhaust branch pipe 15; the combustor 13 is any one of an oil combustor, a gas combustor, a dual-fuel combustor and a biomass combustor, the output end of the feeder 1 is provided with a compression section 2, and the spiral pusher 6 of one section of the cracking cylinder 21 extends through the compression section 2 of the feeder 1. The heating body is spherical. The spherical heating body has good fluidity and good extrusion, grinding and crushing effects.
More specifically, as shown in fig. 1-2, when starting up, a proper amount of heating balls 10 are sequentially placed from a feeder 1, and enter the cracking cylinder through a compression section 2, the heating balls 10 move along a first section of cracking cylinder 21, a second section of cracking cylinder 23, a third section of cracking cylinder 16 and a fourth section of cracking cylinder 19 under the push of a screw pusher 6 and are substantially uniformly distributed in each section of cracking cylinder, and hot air provided by a burner 13 heats each section of cracking cylinder upwards through an air outlet of a hot air duct 12 and heats the heating balls 10 to a process temperature through the wall of the cracking cylinder. After the material enters the feeder 1, the material is compressed and compacted in the compression section 2 of the feeder to avoid bringing air and preventing backflow of pyrolysis gas, after the material enters the first section of the pyrolysis cylinder 21 through the compression section 2, the material starts to be loose and mixed with the heating ball 10 due to the action of space enlargement and heat, the material is stirred and crushed by the screw pusher 6 and is heated to the process temperature by the pyrolysis cylinder and the heating ball 10 to start pyrolysis gradually, the pyrolysis gas enters the double-inlet high-temperature cyclone separator 5 through the pyrolysis gas outlet to separate dust carried by the pyrolysis gas, the pyrolysis gas enters the next process, and the dust is discharged to the next process through the second slag outlet 11. The materials are basically cracked when passing through the two-section cracking cylinder 24, the three-section cracking cylinder 16 and the four-section cracking cylinder 19 within the set process time, slag powder enters the first slag outlet 9 through the gap of the separating screen 8, individual large uncracked materials and the heating balls 10 cannot pass through the separating screen 8, the materials are pushed by the spiral pusher 6 to pass through the one-section cracking cylinder 21 to be mixed with new materials, and the materials enter the second internal circulation, so that the processes are repeated in cycles and infinite circulation until all the materials are cracked finally. The heating furnace 3 of the utility model is also provided with a heat preservation layer 20.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (9)
1. A closed loop type internal circulation moving bed cracking device is characterized by comprising the following components:
the cracking cylinder is provided with N, N is more than three natural numbers, spiral material pushers are arranged in the cracking cylinders, the cracking cylinders are sequentially detachably connected end to form a closed and communicated annular cracking cylinder assembly, one cracking cylinder is a section of cracking cylinder, the rest cracking cylinders are a section of two-section cracking cylinder, a section of three-section cracking cylinder, … …, an N-1 section of cracking cylinder and an N section of cracking cylinder, and a certain amount of heating body is arranged in each cracking cylinder;
the spiral material pushers of the two-section cracking cylinder, the three-section cracking cylinder, the … …, the N-1 section cracking cylinder and the N section cracking cylinder are all driven by a speed reduction and change motor which is arranged outside the heating furnace and is connected with an end flange and can adjust the rotating speed;
the heating mechanism is used for heating the cracking barrel assembly;
the feeder is communicated with the feeding end of the first section of cracking cylinder, the spiral pusher of the first section of cracking cylinder extends through the cavity of the feeder, the shaft end of the spiral pusher is further extended, and the spiral pusher is connected with an external driving motor for driving feeding and pushing;
at least one of the first-section cracking cylinder to the N-section cracking cylinder is provided with a cracking gas outlet channel, and the cracking gas outlet channel is connected with a double-gas-inlet high-temperature cyclone separator;
in the cracking cylinder close to the rear end in the first section of cracking cylinder to the N sections of cracking cylinders, an opening is formed below at least one cracking cylinder, and a slag discharging mechanism is axially arranged at the opening part.
2. The closed-loop internal circulation moving bed cracking device according to claim 1, further comprising a heating furnace, wherein the heating furnace is provided with a cavity, the cracking cylinder assembly is horizontally arranged in the cavity of the heating furnace, the heating mechanism is positioned right below the cracking cylinder assembly, and the heating mechanism adopts electric heating or hot air heating.
3. The closed-loop internal circulation moving bed cracking apparatus according to claim 1, wherein the slag discharge mechanism is configured to: the opening part is axially provided with a separating screen, and the clearance of the separating screen can prevent the heating body from passing through but can pass through the powder slag of the cracked material; the opening part is also provided with a slag powder outlet pipeline which is connected with the cracking cylinder in a sealing way, and the slag powder outlet pipeline is led out from the bottom of the heating furnace.
4. The closed loop internal circulation moving bed cracking apparatus of claim 3, wherein the separation screen is a plurality of bars spaced apart from each other.
5. The closed loop type internal circulation moving bed cracking device of claim 1, wherein N is four, the first cracking cylinder and the third cracking cylinder are provided with cracked gas outlet channels, and the slag discharging mechanism is arranged on the four cracking cylinders.
6. The closed-loop internal circulation moving bed cracking device according to claim 5, wherein the cracking cylinders are sequentially connected end to end by flanges, adjacent cracking cylinders are arranged at an angle of 90 degrees, and the combination of the cracking cylinders is square or rectangular.
7. The closed loop type internal circulation moving bed cracking device of claim 2, wherein the heating mechanism is heated by hot air and comprises an annular hot air duct distributed below the cracking cylinder assembly, an inlet of the hot air duct is communicated with an outlet of a burner, the burner provides heat to heat air by burning fuel, the air is conveyed into the hot air duct, and the cracking cylinder is heated by a plurality of upward outlets of the hot air duct; the combustor is any one of a fuel combustor, a gas combustor, a dual-fuel combustor and a biomass combustor.
8. A closed loop internal circulating moving bed cracking apparatus as claimed in claim 1, wherein the output end of the feeder is provided with a compression section through which the screw pusher of a section of the cracking cylinder extends.
9. The closed loop internal circulation moving bed cracking apparatus according to claim 1, wherein the heating body is spherical.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021872479.5U CN212357143U (en) | 2020-09-01 | 2020-09-01 | Closed loop type internal circulation moving bed cracking device |
| PCT/CN2020/113693 WO2022047769A1 (en) | 2020-09-01 | 2020-09-07 | Closed-loop internal circulation moving bed cracking device and working method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021872479.5U CN212357143U (en) | 2020-09-01 | 2020-09-01 | Closed loop type internal circulation moving bed cracking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212357143U true CN212357143U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021872479.5U Active CN212357143U (en) | 2020-09-01 | 2020-09-01 | Closed loop type internal circulation moving bed cracking device |
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| Country | Link |
|---|---|
| CN (1) | CN212357143U (en) |
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- 2020-09-01 CN CN202021872479.5U patent/CN212357143U/en active Active
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| CP03 | Change of name, title or address |
Address after: 610000 No. 219, Tai'an North Road, Pengzhou, Chengdu, Sichuan Patentee after: Han Fangyuan Patentee after: Yang Chengzhi Address before: 621000 No. 1, 2 / F, unit 3, building 20, No. 40, Xishan East Road, Fucheng District, Mianyang City, Sichuan Province Patentee before: Yang Chengzhi Patentee before: Han Fangyuan |
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| CP03 | Change of name, title or address |