CN211471307U - Double-screw self-cleaning pyrolyzer - Google Patents
Double-screw self-cleaning pyrolyzer Download PDFInfo
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- CN211471307U CN211471307U CN201922328432.6U CN201922328432U CN211471307U CN 211471307 U CN211471307 U CN 211471307U CN 201922328432 U CN201922328432 U CN 201922328432U CN 211471307 U CN211471307 U CN 211471307U
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- bearing seat
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- 238000004140 cleaning Methods 0.000 title claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000197 pyrolysis Methods 0.000 abstract description 29
- 230000008878 coupling Effects 0.000 abstract description 11
- 238000010168 coupling process Methods 0.000 abstract description 11
- 238000005859 coupling reaction Methods 0.000 abstract description 11
- 239000004033 plastic Substances 0.000 abstract description 11
- 229920003023 plastic Polymers 0.000 abstract description 11
- 238000004939 coking Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000002723 waste plastics and rubber Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 50
- 239000007789 gas Substances 0.000 description 26
- 239000003345 natural gas Substances 0.000 description 25
- 239000000463 material Substances 0.000 description 11
- 239000002893 slag Substances 0.000 description 11
- 239000002699 waste material Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000011229 interlayer Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 238000007233 catalytic pyrolysis Methods 0.000 description 4
- 238000005235 decoking Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
Abstract
The utility model belongs to the technical field of the pyrolyzer, concretely relates to twin-screw automatically cleaning pyrolyzer, carry out automatically cleaning formula pyrolysis to waste plastics and rubber scrap, can prevent coking and jam, the major structure includes the mounting bracket, the barrel, the feed inlet, the discharge gate, the gas vent, solenoid, temperature sensor, the initiative screw rod, driven screw, preceding locating flange, the front axle coupling, the front axle bearing, main locating flange, main axle coupling, main bearing seat, the master gear axle, the drive belt, the master gear, including a motor, an end cap, a controller, and a cover plate, from the locating flange, from the shaft bearing, from gear shaft and from the gear, adopt twin-screw structure and electromagnetic heating mode, the clearance of initiative screw rod and driven screw and barrel inner wall is less, initiative screw rod and driven screw complete meshing, and the rotation is opposite, the rotation incorgruous, the helical pitch is less, the helical, The shaft coupling and the bearing seat support, and the pyrolysis temperature is accurately controlled through the temperature sensor, so that the pyrolysis of different types of plastics or rubber is realized.
Description
The technical field is as follows:
the utility model belongs to the technical field of the pyrolyzer, concretely relates to double-screw automatically cleaning pyrolyzer carries out automatically cleaning formula pyrolysis to waste plastics and rubber waste, can prevent coking and jam.
Background art:
with the widespread application of polymer materials, the yield of waste plastics, waste rubber and other garbage is greatly increased. The high molecular polymer waste is generally converted into low molecular compounds or polymers by means of pyrolysis or catalytic pyrolysis, so that the recycling value is obtained. Pyrolysis is a reaction process in which substances are decomposed by heating, and many inorganic and organic substances are decomposed when heated to a certain degree. In the past, pyrolysis processes did not involve catalysts and other energy, such as ultraviolet radiation induced reactions. At present, in order to improve pyrolysis efficiency, improve yield of pyrolysis products, prepare products which are not easily prepared by conventional pyrolysis, and the like, research on adding catalysts to perform catalytic pyrolysis in a pyrolysis process is increasing, and some catalytic pyrolysis processes such as adding catalysts such as CaO, MgO, and the like to perform plastic pyrolysis have been used for industrial production. However, when the hydrocarbon material of the ethylene cracking raw material is dehydrogenated through catalytic reaction and pyrolysis reaction, a coking byproduct is generated, and the ash and residue generated by the pyrolyzed waste plastic or waste rubber are easily attached to the inner wall of the furnace tube, so that the effective inner diameter of the furnace tube is greatly reduced, even the furnace tube is blocked, and the cracking furnace cannot be continuously operated. For example, chinese patent 201820417529.7 discloses a plastic garbage cracking furnace, which comprises a support, a lower transmission device, a slag collecting tray, a lower partition layer, a burner, a distribution device, a cracked gas inlet pipe, a natural gas outlet pipe, a natural gas collector, a feeding device, a vaporized gas outlet pipe, a furnace body, and a gas conversion chamber; the support is arranged at the lower part of the periphery of the furnace body and can support and fix the furnace body; the lower transmission device is arranged at the bottom of the furnace body and can drive the main shaft and the slag collecting disc to rotate; the slag collecting disc is arranged at the bottom of the furnace body, is a thin-wall cavity body with an upper opening and can rotate around the center of the slag collecting disc; the lower interlayer is arranged at the lower part of the inner cavity of the furnace body, the upper end of the lower interlayer is connected with the lower interlayer wall where the burner is arranged, and a closed space is formed between the upper interlayer and the inner wall of the lower interlayer; the combustor is arranged on the lower wall of the combustion chamber and extends into the combustion chamber through the lower wall of the combustion chamber; an air inlet duct is arranged at the periphery of the burner; the burners are uniformly distributed on the lower wall of the combustion chamber; the combustion chamber is arranged in the middle of the furnace body and is a relatively closed space; the lower wall of the furnace body is connected with the lower interlayer, the upper wall and the lower wall have a certain interval, and the end part of the furnace body is connected with the lower wall and the furnace body; the distributing device is arranged in the middle of the inner cavity of the furnace body and comprises a primary distributing device and a secondary distributing device; the primary distributing device is arranged at the upper end of the main shaft, one end of the primary distributing device is fixedly connected with the main shaft, the other end of the primary distributing device is suspended and consists of a plurality of distributing plates, the distributing plates are mutually staggered and are arranged in a scaly shape, and a certain gap is formed between the suspended end of the primary distributing device and the inner wall of the combustion chamber; the distributing plate of the primary distributing device has a downward inclined angle; the secondary distributing device is arranged at the lower end of the upper barrel, one end of the secondary distributing device is connected with the main shaft, the other end of the secondary distributing device is suspended and consists of a plurality of distributing plates, the distributing plates are mutually staggered and are arranged in a scaly shape, and a certain gap is formed between the suspended end of the secondary distributing device and the inner wall of the combustion chamber; the distributing plate of the secondary distributing device has a downward inclined angle; the pyrolysis gas inlet pipe is arranged on the inner wall of the furnace body, the upper end of the pyrolysis gas inlet pipe is open, and the lower end of the pyrolysis gas inlet pipe is connected with the inner cavity of the gas conversion chamber; the natural gas output pipe is arranged on the furnace body, the outer end of the natural gas output pipe is communicated with the natural gas output pipeline, the inner end of the natural gas output pipe is connected with the natural gas outlet pipe of the natural gas collector and is positioned at the upper part of the furnace body and the lower part of the feeding bin; the natural gas collector is arranged in the furnace body and comprises a natural gas outlet pipe, a gas collecting pipe and a natural gas inlet pipe; the natural gas outlet pipe is arranged on the gas collecting pipe, one end of the natural gas outlet pipe is communicated with the natural gas output pipe, and the other end of the natural gas outlet pipe is communicated with the gas collecting pipe; the gas collecting pipe is an annular stainless steel pipe, is arranged at the upper end of the natural gas inlet pipe and is communicated with the natural gas inlet pipe, and the circumference excircle of the gas collecting pipe is communicated with the natural gas outlet pipe; the natural gas inlet pipes are arranged below the gas collecting pipe and are a plurality of stainless steel pipes, the lower ends of the natural gas inlet pipes are communicated with the inner cavity of the gas conversion chamber, the upper ends of the natural gas inlet pipes are communicated with the gas collecting pipe, and the natural gas inlet pipes are uniformly arranged below the gas collecting pipe; the feeding device is arranged at the top of the furnace body and is fixedly connected with the furnace body, the upper part of the feeding device is provided with an opening, and the discharge hole at the lower part is communicated with the inner cavity of the furnace body; the vaporized gas output pipe is arranged on the furnace body and is lower than the natural gas output pipe on the furnace body, the inner end of the vaporized gas output pipe is communicated with the inner cavity of the furnace body, and the outer end of the vaporized gas output pipe is connected with the vaporized gas conveying pipeline; the furnace body is arranged on the bracket and is a cylindrical cavity body, the upper end of the furnace body is connected with the feeding device, and the lower end of the furnace body is suspended and corresponds to the slag collecting disc; the gas conversion chamber is positioned in the furnace body, is positioned at the upper part of the slag collecting disc, is positioned at the periphery of the lower interlayer, forms a closed annular space with the lower interlayer, is communicated with the pyrolysis gas inlet pipe at the side surface and is communicated with the natural gas inlet pipe of the natural gas collector at the top surface. Pyrolysis equipment in the prior art is difficult to clean, and subsequent cleaning work is complicated and difficult, and the service life of the equipment is influenced. For example, chinese patent 201721150549.4 discloses a slag scraping device for a plastic garbage cracking furnace, which is suitable for a plastic garbage cracking furnace, the plastic garbage cracking furnace comprises a support, a lower transmission device, a slag collecting tray, a lower air inlet pipe, a lower partition, a gas pipe, a burner, a combustion chamber, a hot air outlet pipe, an oil-gas mixture outlet pipe, a noncondensable gas outlet pipe, an upper cover, a feeding shaft driving device, a feeding shaft, a conical bin, a spiral feeder, a feeder outer cover, an upper cover plate, an oil outlet pipe, an upper material guide plate, a primary material distributor, an upper grate, an upper drum, a secondary material distributor, a lower grate, a lower drum, a lower cover, a slag scraping device, a main shaft, a slag separator, a steam pipe, an outer rotary joint, an inner rotary joint, a lower water inlet pipe, a lower hot air pipe, and a furnace body; the lower cover and the slag scraping device comprise a lower cover, a scraper, a connecting support and a decoking sprayer, wherein the lower cover is of a conical tubular structure with an upper opening and a lower opening, the upper end of the lower cover is fixedly connected with a main shaft, the lower end of the lower cover is arranged in a suspension mode, the main shaft below the lower cover is provided with the connecting support, the connecting support is of a rod-shaped structure, the number of the connecting support is multiple, the connecting support is uniformly distributed on the outer circumference of the main shaft, all the connecting support are connected through annular supports, the upper end of the connecting support is fixedly connected with the main shaft, the connecting support is provided with the decoking sprayer, the decoking sprayer is communicated with a decoking liquid pipeline arranged in the main shaft through a pipeline, and the connecting support is movably connected with the. Therefore, the development and design of the pyrolyzer capable of cleaning by itself have high social and economic values.
The invention content is as follows:
the utility model aims to overcome the shortcoming that prior art exists, the coke and the jam problem when solving waste plastics and waste rubber pyrolysis are designed to the research and development of a twin-screw automatically cleaning pyrolyzer.
In order to achieve the purpose, the main structure of the twin-screw self-cleaning pyrolyzer comprises a mounting frame, a barrel, a feeding port, a discharge port, an exhaust port, an electromagnetic coil, a temperature sensor, a driving screw, a driven screw, a front positioning flange, a front coupler, a front bearing seat, a main positioning flange, a main coupler, a main bearing seat, a main gear shaft, a driving belt, a main gear, a motor, a slave positioning flange, a slave coupler, a slave bearing seat, a slave gear shaft and a slave gear; the mounting frame is provided with a barrel, the front end of the barrel is provided with a feeding port, the rear end of the barrel is provided with a discharge port, the middle part and the rear end of the barrel are provided with exhaust ports, the upper part of the outer wall of the barrel is provided with an electromagnetic coil in an intermittent manner, the inner wall of the barrel is laid with a temperature sensor, the interior of the barrel is provided with a driving screw and a driven screw which are mutually meshed, the front ends of the driving screw and the driven screw extend out of the barrel and are respectively connected with a front coupler through a front positioning flange, the front coupler is connected with a front bearing seat, the rear end of the driving screw extends out of the barrel and is connected with a main coupler through a main positioning flange, the main coupler is connected with a main bearing seat, the main bearing seat is connected with a driving belt through a main gear shaft, the driving belt is connected with a motor, the rear end of the, the driven gear shaft is connected with the driven bearing seat, the driven gear shaft is sleeved with the driven gear, and the main gear is meshed with the driven gear.
The positions of the driving screw and the driven screw can be interchanged; the rotation directions of the driving screw and the driven screw are opposite, the rotation directions are opposite, the helical blades are completely meshed, the lead is 750mm, the helical angle is 16.6 degrees, and the distance between the helical edges of the driving screw and the driven screw and the inner wall of the cylinder is 4 mm.
Compared with the prior art, the utility model adopts the double-screw structure and the electromagnetic heating mode, the clearance between the driving screw and the driven screw and the inner wall of the cylinder body is smaller, the shearing action to the material is enhanced, the self-cleaning in the pyrolysis process is realized, the occurrence of blockage is prevented, the driving screw and the driven screw are completely meshed, the rotation directions are opposite, the rotation directions are different, the lead is small, the materials can be slowly pushed forwards, the retention time of the materials is prolonged, the pyrolysis is more sufficient, the helical angle is large, the radial force applied to the materials is increased, thereby the contact with the inner wall of the cylinder body is more sufficient, the heat transfer efficiency is increased, the two ends are supported by the positioning flange, the coupling and the bearing seat, the radial displacement is reduced, the transmission is more stable and reliable, the direct abrasion between the screw thread blade and the inner wall of the cylinder body is avoided, thereby avoiding the occurrence of coking phenomenon and leading the residue generated by pyrolysis to be smoothly discharged under the self-cleaning function; the heating mode of the electromagnetic coil has the advantages of high heating speed, stable operation and high thermal efficiency, ensures the stability of pyrolysis and required reaction conditions, avoids waste generation caused by pyrolysis temperature fluctuation, reduces the burden, and is energy-saving and environment-friendly; pyrolysis temperature is accurately controlled through a temperature sensor, and pyrolysis of different types of plastics or rubber is realized.
Description of the drawings:
fig. 1 is a schematic diagram of the main structure principle of the present invention.
Fig. 2 is a sectional view of the main structure of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following examples and accompanying drawings.
Example 1:
the main structure of the twin-screw self-cleaning pyrolyzer related to this embodiment includes a mounting frame 1, a barrel 2, a feeding port 3, a discharging port 4, an exhaust port 5, an electromagnetic coil 6, a temperature sensor 7, a driving screw 8, a driven screw 9, a front positioning flange 10, a front coupling 11, a front bearing seat 12, a main positioning flange 13, a main coupling 14, a main bearing seat 15, a main gear shaft 16, a driving belt 17, a main gear 18, a motor 19, a slave positioning flange 20, a slave coupling 21, a slave bearing seat 22, a slave gear shaft 23 and a slave gear 24; the mounting frame 1 is provided with a barrel 2, the front end of the barrel 2 is provided with a feeding port 3, the rear end of the barrel 2 is provided with a discharging port 4, the middle part and the rear end of the barrel 2 are both provided with exhaust ports 5, the upper part of the outer wall of the barrel 2 is intermittently provided with an electromagnetic coil 6, the inner wall of the barrel 2 is coated with a temperature sensor 7, the interior of the barrel 2 is provided with a driving screw 8 and a driven screw 9 which are meshed with each other, the front ends of the driving screw 8 and the driven screw 9 extend out of the barrel 2 and are respectively connected with a front coupling 11 through a front positioning flange 10, the front coupling 11 is connected with a front bearing seat 12, the rear end of the driving screw 8 extends out of the barrel 2 and is connected with a main coupling 14 through a main positioning flange 13, the main coupling 14 is connected with a main bearing seat 15, the main bearing seat 15 is connected with a driving belt 17 through, the rear end of the driven screw 9 extends out of the cylinder 2 and is connected with a driven coupler 21 through a driven positioning flange 20, the driven coupler 21 is connected with a driven bearing seat 22, the driven bearing seat 22 is connected with a driven gear shaft 23, a driven gear 24 is sleeved on the driven gear shaft 23, and the main gear 18 is meshed with the driven gear 24.
The positions of the driving screw 8 and the driven screw 9 related to the embodiment can be interchanged; the rotation directions of the driving screw rod 8 and the driven screw rod 9 are opposite, the rotation directions are opposite, the helical blades are completely meshed, the lead is 750mm, the helical angles are 16.6 degrees, and the distance between the helical edges of the driving screw rod 8 and the driven screw rod 9 and the inner wall of the barrel 2 is 4 mm.
Example 2:
when the double-screw self-cleaning pyrolyzer related to the embodiment is used, a material composed of waste rubber or waste plastic enters from the feeding port 3, the driving screw 8 and the driven screw 9 rotate in different directions synchronously, the electromagnetic coil 6 indirectly heats the material through the barrel 2, the material is pyrolyzed while being pushed forwards, the pyrolysis temperature is monitored in real time by the temperature sensor 7, the accurate control of the pyrolysis temperature is realized, and oil gas generated by pyrolysis enters the condensing pipe connected with the exhaust port 5 through the exhaust port 5 to be recycled; the residue that the pyrolysis produced is clean in turn between the initiative screw rod 8 of meshing and driven screw rod 9, scrapes away each other to direct discharge gate 4 unloads out, has avoided the residue to adhere to on initiative screw rod 8 and driven screw rod 9, and simultaneously, the less clearance fit mode between the inner wall of initiative screw rod 8 and driven screw rod 9 and barrel 2 makes powerful shearing force can effectively prevent the residue from adhering to at 2 inner walls of barrel, thereby prevents that the coking from taking place.
Claims (1)
1. A double-screw self-cleaning pyrolyzer is characterized in that a main body structure comprises a mounting frame, a barrel, a feeding port, a discharging port, an exhaust port, an electromagnetic coil, a temperature sensor, a driving screw, a driven screw, a front positioning flange, a front coupler, a front bearing seat, a main positioning flange, a main coupler, a main bearing seat, a main gear shaft, a transmission belt, a main gear, a motor, a slave positioning flange, a slave coupler, a slave bearing seat, a slave gear shaft and a slave gear; the mounting frame is provided with a barrel, the front end of the barrel is provided with a feeding port, the rear end of the barrel is provided with a discharge port, the middle part and the rear end of the barrel are provided with exhaust ports, the upper part of the outer wall of the barrel is provided with an electromagnetic coil in an intermittent manner, the inner wall of the barrel is laid with a temperature sensor, the interior of the barrel is provided with a driving screw and a driven screw which are mutually meshed, the front ends of the driving screw and the driven screw extend out of the barrel and are respectively connected with a front coupler through a front positioning flange, the front coupler is connected with a front bearing seat, the rear end of the driving screw extends out of the barrel and is connected with a main coupler through a main positioning flange, the main coupler is connected with a main bearing seat, the main bearing seat is connected with a driving belt through a main gear shaft, the driving belt is connected with a motor, the rear end of the, the driven gear shaft is connected with the driven gear shaft through the bearing seat, a driven gear is sleeved on the driven gear shaft, and the main gear is meshed with the driven gear; the positions of the driving screw and the driven screw can be interchanged; the rotation directions of the driving screw and the driven screw are opposite, the rotation directions are opposite, the helical blades are completely meshed, the lead is 750mm, the helical angle is 16.6 degrees, and the distance between the helical edges of the driving screw and the driven screw and the inner wall of the cylinder is 4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922328432.6U CN211471307U (en) | 2019-12-23 | 2019-12-23 | Double-screw self-cleaning pyrolyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922328432.6U CN211471307U (en) | 2019-12-23 | 2019-12-23 | Double-screw self-cleaning pyrolyzer |
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| Publication Number | Publication Date |
|---|---|
| CN211471307U true CN211471307U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922328432.6U Expired - Fee Related CN211471307U (en) | 2019-12-23 | 2019-12-23 | Double-screw self-cleaning pyrolyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347150A (en) * | 2022-01-09 | 2022-04-15 | 景津装备股份有限公司 | Automatic blockage clearing device for pulling cake cutting double rollers and corresponding filter cake crushing and strip cutting mechanism |
-
2019
- 2019-12-23 CN CN201922328432.6U patent/CN211471307U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114347150A (en) * | 2022-01-09 | 2022-04-15 | 景津装备股份有限公司 | Automatic blockage clearing device for pulling cake cutting double rollers and corresponding filter cake crushing and strip cutting mechanism |
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Granted publication date: 20200911 Termination date: 20211223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |