CN110316524B - Internal and external gas separation device of screw conveyer - Google Patents
Internal and external gas separation device of screw conveyer Download PDFInfo
- Publication number
- CN110316524B CN110316524B CN201810286013.8A CN201810286013A CN110316524B CN 110316524 B CN110316524 B CN 110316524B CN 201810286013 A CN201810286013 A CN 201810286013A CN 110316524 B CN110316524 B CN 110316524B
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- 238000000926 separation method Methods 0.000 title claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 230000004888 barrier function Effects 0.000 claims abstract description 28
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 238000004227 thermal cracking Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 63
- 239000000463 material Substances 0.000 claims description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 15
- 239000012809 cooling fluid Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 8
- 239000000725 suspension Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G33/00—Screw or rotary spiral conveyors
- B65G33/24—Details
- B65G33/32—Adaptations of bearings or couplings for supporting and connecting screws
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Screw Conveyors (AREA)
Abstract
The invention discloses an internal and external gas separation device of a screw conveyer, which is arranged on the screw conveyer of a screw type thermal cracking reaction furnace, and the internal and external gas separation device of the screw conveyer comprises: the gas pressure detection device comprises an isolation unit, a gas pressure detection unit, a blocking gas supply unit, a sealing unit and a cooling kit, wherein a cavity is formed in the isolation unit; the gas pressure detecting unit is used for detecting the gas pressure value in the cavity; the barrier gas supply unit pressurizes barrier gas into the cavity to enable the interior and the exterior of the cavity to form unequal gas pressure; the sealing unit comprises a ring sleeve which is arranged on the outer side surface of the end cover plate of the isolation unit and surrounds the rotating shaft, and a groove is formed between the inner wall surface of the ring sleeve and the outer surface of the rotating shaft; an elastic sealing element is arranged around the groove; a ring cover tightly presses the elastic sealing element in the groove and abuts against a gap between the end cover plate and the rotating shaft; the cooling external member sets up at the cavity inboard for cooling shaft temperature avoids haring the elastic sealing member in the outside, in order to promote the security of production operation.
Description
Technical Field
The present invention relates to the technical field of cracking furnace reactors, and more particularly to an internal and external gas separation device for a screw conveyor for preventing contact between internal gas of the screw conveyor and external air in a screw thermal cracking reactor.
Background
A spiral conveyer is a continuous conveying device without flexible traction components, and conveys materials along the direction parallel to the central axis of a spiral by means of the thrust of the rotary spiral. The general screw conveyer has a structure including a material pipe, a screw blade, a rotating shaft, bearings at two ends, a middle suspension bearing and a driving device. The spiral body formed from spiral blade and rotating shaft is supported by two end bearings and intermediate suspension bearing, and is driven by driving device. When the screw conveyor works, materials enter the material pipe from a feeding hole formed in the material pipe, and under the pushing of the rotary helical blade, the materials axially move along the material pipe until the materials are discharged from a discharging hole formed in the material pipe.
Some technical fields are quite suitable for using a screw conveyor as a raw material conveying device, for example, taiwan patent No. M494882 discloses a cracking furnace feeding air blocking device, which is characterized in that a movable cover plate is pivoted at a discharge port of the screw conveyor for feeding the cracking furnace, the cover plate has a certain weight and can cover the outside of the discharge port or be ejected outwards along with the discharge port and incline at an oblique angle of about 30 degrees to slightly inhibit the discharge, a maintenance groove is arranged outside the discharge port, a feeding port is arranged at the other end of the screw conveyor, a small hopper is arranged at the feeding port and can receive waste rubber and plastic materials from the upstream end, thereby continuously feeding the waste rubber and plastic materials into the screw conveyor from the small hopper, continuously feeding the screw conveyor, slightly inhibiting the discharge by matching with the cover plate at the discharge port, and continuously and compactly filling the inside of the screw conveyor, the feed end of the cracking furnace is fed, so that the feed end of the cracking furnace is in a completely closed state to prevent air from entering the cracking furnace, thereby greatly reducing the contact chance of gas and air in the furnace and effectively preventing gas explosion.
However, no matter the structure design of the screw conveyor or the general screw conveyor as described above, as shown in fig. 1, the feeding material of the material pipe 11 is fed into the material pipe 11 from the feeding hopper 110 of the pipe body, and the rotating shaft 13 of the helical blade 12 inside the material pipe 11 of the screw conveyor 1 is driven by the driving device 14 to be located outside the material pipe 113, so that the rotating shaft 13 passes through the end plate 111 of the material pipe 11 from the outside of the material pipe 113 to enter the inside space 112 of the material pipe, in this structure, the end plate 111 of the material pipe 11 is a stationary member, and the rotating shaft 13 is a rotating member, so a sealing structure 114 must be provided between the end plate 111 and the rotating shaft 13 to prevent the gas outside the material pipe 113 from entering the inside space 112 of the material pipe. However, since the screw conveyor 1 feeds in the hot air chamber 4, the interior of the material pipe 11 is in a high-temperature environment, so the end plate 111 and the rotating shaft 13 which are directly heated are also heated to form a high-temperature component, and the sealing structure 114 is heated by the end plate 111 and the rotating shaft 13 with high temperature for a long time, the sealing material is easily damaged to generate air leakage, and if no detection and early warning mechanism is provided at this stage, the air leakage condition is aggravated, so that when the air outside the material pipe 113 invades into the material pipe interior space 112, the safety accident that the material pipe 11 of the screw conveyor 1 explodes is easily caused.
Disclosure of Invention
The invention aims to provide an internal and external gas blocking device of a material pipe between the outer side of an end plate of the material pipe of a spiral conveyor and a sealing unit, which not only can be used for substantially pressurizing and isolating gas in the material pipe, but also can be used for buffering heat transfer, so that the sealing unit keeps a certain distance from the end plate and a rotating shaft of a high-heat section, and adverse effects of heat on the sealing unit are avoided.
To achieve the above object, the present invention provides an internal and external gas blocking device for a screw conveyor, which is installed on a screw conveyor of a spiral thermal cracking reactor, wherein the screw conveyor includes a material tube having an end plate, a rotating shaft penetrating through a central axis of the material tube, a helical blade connected to the rotating shaft, bearings supporting two ends of the rotating shaft to rotate freely, and a driving unit disposed outside the material tube and driving the rotating shaft to rotate, the internal and external gas blocking device for the screw conveyor includes: the isolation unit is arranged between an end plate of the spiral conveyor and the driving unit, a cavity surrounding a local section of the rotating shaft is arranged in the isolation unit, and the cavity is provided with an air inlet capable of being blocked to seal the cavity; the gas pressure detecting unit is arranged in the cavity and can provide a gas pressure value in the cavity in real time; the barrier gas supply unit is connected with the gas inlet and is used for pressurizing barrier gas to be injected into the cavity, so that unequal pressure is formed between the inside of the cavity and the outside of the cavity; and the sealing unit comprises a ring sleeve, at least one elastic sealing element and a ring cover, the ring sleeve is arranged on the outer side surface of the end cover plate on one side of the isolating unit, which is far away from the material pipe, and surrounds the rotating shaft, a groove is formed between the inner wall surface of the ring sleeve and the outer surface of the rotating shaft, the at least one elastic sealing element is annularly arranged in the groove, the ring cover tightly presses the at least one elastic sealing element in the groove by a plug part corresponding to the shape of the groove, and the elastic sealing element facing the end cover plate tightly presses against a gap between the end cover plate and the rotating shaft.
In one embodiment, the internal and external gas barrier device of the screw conveyor further comprises: the cooling kit comprises a water jacket, a water inlet part and a water outlet part, wherein the water jacket is arranged in the cavity and covers the rotating shaft; a fluid supply unit connected to the water inlet part for driving the cooling fluid into the water jacket; and a fluid discharge unit connected with the water outlet part for guiding out the cooling fluid in the water jacket. The fluid supply unit can be communicated with the pipeline of the fluid discharge unit, thereby forming a structure for circularly supplying cooling fluid to the water jacket.
In one embodiment, the end cover plate between the groove and the chamber is provided with at least one air hole communicating the groove and the chamber, and when the plug portion of the ring cover is forced into the groove, the elastic sealing member is elastically deformed to abut against the at least one air hole.
In one embodiment, the barrier gas is nitrogen.
In one embodiment, the resilient seal is an O-ring. The resilient seal is a plurality of O-rings juxtaposed on the surface of the shaft.
In one embodiment, the gas pressure detecting unit comprises a pressure gauge for providing a gas pressure value in the chamber in real time.
The invention is characterized in that: 1. the adjacent isolation units are arranged outside the material pipe end plate of the spiral conveyor, and the sealing unit is arranged on one side of the isolation unit away from the material pipe so as to keep a certain distance from the end plate and the rotating shaft hot area, thereby avoiding contact heating and radiation heating with the material pipe end plate and short-distance heat conduction heating of the rotating shaft hot area, and ensuring that the service life of the sealing unit is kept; 2. in order to enhance the heat insulation, the high heat of the rotating shaft can not be transmitted to the sealing unit through the isolation unit, and the isolation unit can be further provided with a cooling sleeve to block the high heat of the hot area of the rotating shaft; 3. the isolation unit is provided with a sealable chamber, barrier gas is pressurized and filled in the chamber, and the pressure of the barrier gas in the chamber is detected in real time to form an alarm mechanism for failure of a gas barrier effect.
Drawings
FIG. 1 is a schematic view of an internal and external gas barrier of a screw conveyor of the prior art;
FIG. 2 is a schematic diagram of a screw conveyor of the present invention with an internal and external gas barrier and an elastic seal failure warning mechanism;
FIG. 3 is an internal and external gas barrier of the screw conveyor of FIG. 2;
fig. 4 shows the inner and outer gas barriers of the screw conveyor including the cooling kit of the rotating shaft.
Symbolic illustration in the drawings:
1, a screw conveyor; 11 material pipes; 110 into a hopper; 111 an end plate; 112 the inner space of the material pipe; 113 outside the material pipe; 114 a sealing structure; 12 a helical blade; 13 a rotating shaft; 14 a drive device; 2, a screw conveyor; a 21 material pipe; 211 end plates; 212 a feeding device; 22 a rotating shaft; 23 a helical blade; 24 bearings; 25 intermediate suspension bearings; 26 a drive unit; 3 an internal and external gas barrier device; 31 an isolation unit; 311 a chamber; 3111 an air inlet; 312 end cover plates; 3121 air holes; 32 gas pressure detecting unit; 33 a barrier gas supply unit; 34 a sealing unit; 341 ring sleeve; 3411 a trench; 342 an elastomeric seal; 343 ring covers; 3431 a plug portion; 35 cooling the kit; 351 water jacket; 352 a water inlet part; 353 a water outlet part; 36 a fluid supply unit; 37 a fluid discharge unit; 4 hot air chamber; a, a gap; b, blocking gas; d, material; h, hot gas; w cools the fluid.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are simplified schematic drawings only for illustrating the basic structure of the invention, and therefore, only the components related to the invention are shown in the drawings, and the components are not drawn with the number, shape, size ratio, etc. in practical implementation, the specification and the size in practical implementation are actually a selective design, and the layout of the components may be more complicated.
First, please refer to fig. 2 and fig. 3. In the internal and external gas blocking device 3 of the screw conveyor 2 of the spiral thermal cracking reactor of this embodiment, the screw conveyor 2 includes a material pipe 21 having an end plate 211, a rotating shaft 22 penetrating through the central axis of the material pipe 21, a helical blade 23 connected to the rotating shaft 22, bearings 24 supporting two ends of the rotating shaft 22 to rotate freely, one or more middle suspension bearings 25 disposed in the material pipe 21 according to the length of the rotating shaft 22, and a driving unit 26 disposed outside the material pipe 21 and driving the rotating shaft 22 to rotate, of course, the proper position of the body of the material pipe 21 includes a material feeding device 212 for feeding materials (such as waste rubber and plastic materials) from the outside of the material pipe 21 into the inside of the material pipe 21.
The internal and external gas barrier device 3 includes: an isolation unit 31 disposed between the end plate 211 (the end plate 211 near the side of the driving unit 26) of the screw conveyor 2 and the driving unit 26 and adjacent to the end plate 211, wherein the isolation unit 31 has a chamber 311 surrounding a local section of the rotating shaft 22, and the chamber 311 has an inlet 3111 capable of opening and closing to fill or seal the chamber 311; a gas pressure detecting unit 32 disposed in the chamber 311 and capable of providing a gas pressure value in the chamber 311 in real time; a barrier gas supply unit 33 connected to the gas inlet 3111 for driving a barrier gas B (the barrier gas B may be nitrogen) into the chamber 311 under pressure, so that the gas pressure inside the chamber 311 and the gas pressure outside the chamber 311 form different gas pressures (preferably, the gas pressure inside the chamber 311 is greater than the gas pressure outside the chamber 311, but not limited thereto); a sealing unit 34, comprising a ring housing 341, at least one elastic sealing member 342 (the elastic sealing member 342 can be an O-ring, and can be disposed in a manner of a plurality of O-rings juxtaposed on the surface of the rotating shaft 22), and a ring cover 343, wherein the ring housing 341 is disposed on the outer side surface of the end cover plate 312 (the end cover plate 312 on the side close to the driving unit 26) on the side of the isolating unit 31 away from the material pipe 21 and surrounds the rotating shaft 22, a groove 3411 is formed between the inner wall surface of the ring housing 341 and the outer surface of the rotating shaft 22, the at least one elastic sealing member 342 is disposed around the groove 3411, and the ring cover 343 tightly presses the at least one elastic sealing member 342 in the groove 3411 by a plug 3431 corresponding to the shape of the groove 3411, and the elastic sealing member 342 facing the end cover 312 tightly presses against the gap a between the end cover plate 312 and the rotating shaft 22.
According to the above mechanism, when the screw conveyor 2 of the present embodiment is applied to the technical field of cracking furnace reactors, the periphery of the material pipe 21 of the screw conveyor 2 is coated and heated by the hot air chamber 4 filled with hot air H, so that the temperature inside the material pipe 21 is raised to a temperature at which the material D is suitable for cracking and desorption.
Please refer to fig. 4. The present embodiment is based on the previous embodiment (shown in fig. 3), and further includes: a cooling kit 35, which includes a water jacket 351 disposed in the chamber 311 and covering the rotating shaft 22, a water inlet portion 352 connected to the inside of the water jacket 351 and extending to the outside of the chamber 311, and a water outlet portion 353 connected to the inside of the water jacket 351 and extending to the outside of the chamber 311; a fluid supply unit 36 connected to the water inlet portion 352 for driving the cooling fluid W into the water jacket 351; and a fluid discharge unit 37 connected to the water outlet portion 353 for discharging the cooling fluid W in the water jacket 351.
In one embodiment, the fluid supply unit 36 is connected to the fluid discharge unit 37, thereby forming a structure for circulating and supplying the cooling fluid W to the water jacket 351.
In one embodiment, the end cover 312 between the space of the groove 3411 and the space of the chamber 311 is provided with at least one air hole 3121 connecting the space of the groove 3411 and the space of the chamber 311, and when the plug 3431 of the ring cover 343 is forced into the groove 3411, the elastic sealing member 342 is elastically deformed to abut against the at least one air hole 3121.
In one embodiment, the gas pressure detecting unit 32 includes a pressure gauge to provide the pressure of the gas in the chamber 311 in real time.
The above-described embodiments are merely illustrative of the principles, features and effects of the present invention, and are not intended to limit the scope of the invention, which can be modified and varied by those skilled in the art without departing from the spirit and scope of the invention. Any equivalent changes and modifications made by the present disclosure should be covered by the appended claims. Therefore, the protection scope of the present invention should be as set forth in the claims.
Claims (7)
1. The utility model provides an inside and outside gaseous separation device of screw conveyer, installs on the screw conveyer of a spiral thermal cracking reacting furnace, wherein, this screw conveyer includes that one has the material pipe of end plate, a pivot that runs through this material pipe center pin, a helical blade who connects this pivot, supports the bearing at this pivot free rotation's both ends to and one sets up in this material outside of tubes and orders about this pivot pivoted drive unit, its characterized in that, this screw conveyer's inside and outside gaseous separation device contains:
the isolation unit is arranged between an end plate of the spiral conveyor and the driving unit, a cavity surrounding a local section of the rotating shaft is arranged in the isolation unit, and the cavity is provided with an air inlet capable of being blocked to seal the cavity;
the gas pressure detecting unit is arranged in the cavity and provides a gas pressure value in the cavity in real time;
the barrier gas supply unit is connected with the gas inlet and is used for pressurizing barrier gas to be injected into the cavity, so that unequal pressure is formed between the inside of the cavity and the outside of the cavity, and the barrier gas is nitrogen;
a sealing unit, the sealing unit includes a ring sleeve, at least one elastic sealing element and a ring cover, the ring sleeve is arranged on the outer side surface of the end cover plate on one side of the isolating unit far away from the material pipe and surrounds the rotating shaft, a groove is formed between the inner wall surface of the ring sleeve and the outer surface of the rotating shaft, the at least one elastic sealing element is arranged in the groove in a surrounding manner, the ring cover tightly presses the at least one elastic sealing element in the groove by a plug part corresponding to the shape of the groove, and the elastic sealing element facing the end cover plate tightly presses against a gap between the end cover plate and the rotating shaft; and
the cooling kit comprises a water jacket, a water inlet part and a water outlet part, wherein the water jacket is arranged in the cavity and covers the rotating shaft;
the inner and outer gas blocking device is used for buffering heat transfer, so that the sealing unit keeps a certain distance from the end plate and the rotating shaft of the high heat section, and therefore high heat of the rotating shaft cannot be transferred to the sealing unit through the isolating unit.
2. The internal and external gas barrier apparatus of a screw conveyor according to claim 1, further comprising:
a fluid supply unit connected to the water inlet part for driving the cooling fluid into the water jacket; and
a fluid discharge unit connected to the water outlet portion for discharging the cooling fluid in the water jacket.
3. The internal and external gas barrier apparatus of screw conveyor according to claim 2, wherein said fluid supply unit is connected to the pipe of said fluid discharge unit, thereby forming a structure for circulating and supplying cooling fluid to said water jacket.
4. The inner and outer gas barrier device of claim 1 or 2, wherein the end cover plate between the groove and the chamber is provided with at least one gas hole communicating the groove and the chamber, and when the plug portion of the ring cover is forced into the groove, the elastic sealing member is elastically deformed to abut against the at least one gas hole.
5. The internal and external gas barrier apparatus of a screw conveyor according to claim 1, wherein the elastic sealing member is an O-ring.
6. The internal and external gas barrier apparatus of a screw conveyor according to claim 5, wherein said elastic sealing member is a plurality of O-rings juxtaposed on the surface of said rotating shaft.
7. The internal and external gas barrier device of claim 1, wherein said gas pressure detecting unit comprises a pressure gauge for providing a gas pressure value in said chamber in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810286013.8A CN110316524B (en) | 2018-03-30 | 2018-03-30 | Internal and external gas separation device of screw conveyer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810286013.8A CN110316524B (en) | 2018-03-30 | 2018-03-30 | Internal and external gas separation device of screw conveyer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110316524A CN110316524A (en) | 2019-10-11 |
| CN110316524B true CN110316524B (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810286013.8A Active CN110316524B (en) | 2018-03-30 | 2018-03-30 | Internal and external gas separation device of screw conveyer |
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| CN (1) | CN110316524B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113800207A (en) * | 2021-09-18 | 2021-12-17 | 南京搏特曼环保设备制造有限公司 | Take atmospheric pressure screw conveyer |
| CN114394386B (en) * | 2022-01-19 | 2023-08-08 | 浙江迦南科技股份有限公司 | Novel dry process machine material conveying device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201873283U (en) * | 2010-11-10 | 2011-06-22 | 白银有色集团股份有限公司 | Shaft end sealing device of spiral conveyer |
| CN102139800B (en) * | 2011-02-25 | 2013-01-16 | 秦皇岛西重所燕大重型机械研究院有限公司 | High temperature-keeping screw conveyor |
| CN202115986U (en) * | 2011-05-12 | 2012-01-18 | 张晓凤 | High-pressure resistant solid conveying appliance |
| CN102556608B (en) * | 2012-01-12 | 2014-03-26 | 冀州中科能源有限公司 | High-temperature-resistant screw conveyor |
| CN106927201A (en) * | 2015-12-31 | 2017-07-07 | 中核四○四有限公司 | A kind of auger conveyor for conveying hydrofluorination mixed material |
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| CN110316524A (en) | 2019-10-11 |
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Effective date of registration: 20231019 Address after: Unit 1, 17th Floor, Building 1, No. 91 South Third Ring West Road, Fengtai District, Beijing, 2029-59 Patentee after: Beijing Zhongchuang Carbon and Renewable Resources Technology Development Co.,Ltd. Address before: 7th Floor, No. 106 Minquan Second Road, Qianzhen District, Kaohsiung City Patentee before: Zhang Ruiyong |
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