CN115265258A - Double-layer storage well device for storing radioactive substance product cups - Google Patents
Double-layer storage well device for storing radioactive substance product cups Download PDFInfo
- Publication number
- CN115265258A CN115265258A CN202210437277.5A CN202210437277A CN115265258A CN 115265258 A CN115265258 A CN 115265258A CN 202210437277 A CN202210437277 A CN 202210437277A CN 115265258 A CN115265258 A CN 115265258A
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- inner cylinder
- double
- well device
- storage well
- product
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- 238000003860 storage Methods 0.000 title claims abstract description 76
- 239000000941 radioactive substance Substances 0.000 title claims abstract description 19
- 239000011521 glass Substances 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 13
- 239000012774 insulation material Substances 0.000 claims description 9
- 239000012857 radioactive material Substances 0.000 claims description 5
- 235000019362 perlite Nutrition 0.000 claims description 4
- 239000010451 perlite Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000002285 radioactive effect Effects 0.000 claims 5
- 238000000151 deposition Methods 0.000 claims 2
- 230000009977 dual effect Effects 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 15
- 238000001816 cooling Methods 0.000 description 8
- 230000005855 radiation Effects 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002355 dual-layer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/28—Treating solids
- G21F9/34—Disposal of solid waste
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- High Energy & Nuclear Physics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
Abstract
The invention belongs to the technical field of nuclear waste treatment, and particularly relates to a double-layer storage well device for storing radioactive substance product cups, wherein the double-layer storage well device (18) is in a straight cylinder shape, is vertically arranged in a storage chamber for storing the product cups (6), and comprises an inner cylinder (1) for containing the product cups (6) and an outer cylinder (2) sleeved on the periphery of the inner cylinder (1), a spiral gas flow channel for heat dissipation is arranged between the inner cylinder (1) and the outer cylinder (2), and the product cups (6) are glass solidified bodies for storing radioactive substances. The invention utilizes the means that the fluid continuously changes the direction in the spiral gas flow channel, thereby causing secondary circulation on the cross section to strengthen heat exchange, can effectively lead out the heat generated by the product cup (6) due to decay through convective heat exchange, can effectively reduce the heat conducted to the concrete wall of the storage chamber through radiative heat exchange, and further ensures that the temperature of the concrete meets the design requirement.
Description
Technical Field
The invention belongs to the technical field of nuclear waste treatment, and particularly relates to a double-layer storage well device for storing radioactive substance product cups.
Background
In the post-treatment process of nuclear waste, the radioactive substance storage facilities of the post-treatment plant usually adopt a natural ventilation or forced ventilation mode, and the development of a ventilation cooling system of the post-treatment plant is of great significance for the safe and reliable storage and subsequent disposal of the radioactive substance. The glass solidification is an effective mode for sealing radioactive substances, and due to decay and heat release of the radioactive substances, the glass solidified body needs to continuously guide out generated heat by virtue of a ventilation system in the storage process, so that the glass solidified body is efficiently and fully cooled. The design of ventilation cooling systems requires two concerns: firstly, the integrity of the storage container needs to be ensured, and damage caused by local overheating is prevented; it is also desirable to avoid the structural strength of concrete walls in storage rooms from being affected by excessive temperatures.
Glass solidified bodies (product cup containers) used for storing radioactive substances in radioactive substance storage facilities of a post-processing plant transfer heat generated by decay of the radioactive substances to concrete walls of the storage facilities in modes of natural convection, thermal radiation and the like, a common storage well is a single-layer cylinder barrel without an opening or a single-layer cylinder barrel with rectangular holes, and the phenomenon that the temperature of a concrete structure exceeds the standard due to the fact that the surface of the product cup container is high in temperature and the effect of a ventilation cooling system is poor.
Disclosure of Invention
The invention aims to provide a storage well device for enhancing the ventilation and cooling effects of radioactive substance storage facilities, which can effectively lead out heat generated by decay of a product cup through convection heat exchange and can effectively reduce the heat conducted to a concrete wall of a storage chamber through radiation heat exchange so as to ensure that the temperature of concrete meets the design requirements.
In order to achieve the above purpose, the technical scheme adopted by the invention is a double-layer storage well device for a product cup of radioactive substances, the double-layer storage well device is in a straight cylinder shape, is vertically arranged in a storage chamber for storing the product cup, and comprises an inner cylinder for accommodating the product cup and an outer cylinder sleeved on the periphery of the inner cylinder, a spiral gas flow channel for heat dissipation is arranged between the inner cylinder and the outer cylinder, and the product cup is a glass solidified body for storing the radioactive substances.
Further, the outer surface of the inner cylinder is wound with spiral flow deflectors, the outer surface of the inner cylinder, the inner surface of the outer cylinder and the spiral flow deflectors jointly form the spiral gas flow channel, and the spiral flow deflectors are connected with the inner cylinder and the outer cylinder together through welding.
Furthermore, a plurality of vent holes are formed in the wall of the inner barrel, and the number of the vent holes is gradually increased from the bottom end to the top end of the inner barrel; the top of inner tube, 360 degrees circumference evenly set up the ventilation hole.
Furthermore, the top end of the inner cylinder and the top end of the outer cylinder are hermetically connected together through a heat insulation material sealing plug to form the top end of the double-layer storage well device, an opening in the top end of the inner cylinder serves as a top vent of the double-layer storage well device, a through hole corresponding to the top vent is formed in a concrete ceiling of the storage chamber, and the top vent is arranged in the concrete ceiling of the storage chamber through the through hole; the top ends of the inner barrel and the outer barrel are isolated from the concrete ceiling through the heat insulation material sealing plugs.
Further, the bottom end of the inner cylinder and the bottom end of the outer cylinder are arranged on a bottom support seat, the bottom support seat is of an annular structure provided with support pillars, the inner cylinder and the outer cylinder are fixed through the bottom support seat to form the bottom end of the double-layer storage well device, an opening in the bottom end of the inner cylinder and a hollow part of the bottom support seat are used as bottom ventilation openings of the double-layer storage well device together, and the bottom support seat is also used for supporting the product cups stored in the inner cylinder through the support pillars; the lower surface of the bottom supporting seat is arranged on a concrete floor of the storage chamber, and a through hole corresponding to the bottom vent is formed in the concrete floor and used for allowing air flow to enter the inner barrel.
Further, a gap of 10mm-20mm is kept between the inner surface of the inner cylinder and the cup body of the product cup, and the gap between the inner cylinder and the outer cylinder is 100-200mm.
Further, the material of the heat insulation material sealing plug is an expanded perlite product.
Further, the inner cylinder, the outer cylinder, the spiral flow deflector and the bottom support seat are made of stainless steel, the wall thickness of the inner cylinder is 5-10mm, and the wall thickness of the outer cylinder is 2-5mm.
The invention has the beneficial effects that:
1. the operation under the conditions of mechanical ventilation and natural ventilation is supported;
2. the direction of the fluid is continuously changed in a spiral gas flow channel formed by the inner cylinder 1, the outer cylinder 2 and the spiral flow deflector 3, so that the heat exchange is enhanced by means of secondary circulation on the cross section, and the heat generated by decay of the product cup 6 can be effectively led out through convective heat exchange; meanwhile, the heat conducted to the concrete wall of the storage chamber through radiation heat exchange can be effectively reduced, so that the temperature of the concrete can meet the design requirement;
3. the air which flows upwards through the spiral gas flow channel flows upwards and enters a flow area between the product cup 6 and the inner cylinder 1 of the shaft through the vent hole 4 on the inner cylinder 1 at the same time, so that the turbulence degree of the air is enhanced.
Drawings
FIG. 1 is a schematic illustration of a dual-layer storage well arrangement for product cups of radioactive material according to an embodiment of the present invention;
FIG. 2 is a schematic view of the inner cartridge 1 according to the embodiment of the present invention;
FIG. 3 is a schematic view of the outer surface of the inner barrel 1 according to the embodiment of the present invention;
fig. 4 is a schematic view of the outer tub 2 according to the embodiment of the present invention;
FIG. 5 is a view taken along the line A of FIG. 4 (a plan view of the heat insulating material sealing plug 5);
FIG. 6 is a schematic view of the bottom bracket 7 according to the embodiment of the present invention;
FIG. 7 is a schematic illustration of a dual-layer storage well arrangement for product cups of radioactive material disposed within a storage chamber, in accordance with embodiments of the present invention;
in the figure: 1-inner cylinder, 2-outer cylinder, 3-spiral flow deflector, 4-vent hole, 5-heat-insulating material sealing plug, 6-product cup, 7-bottom support seat, 8-top vent hole, 9-bottom vent hole, 10-concrete ceiling, 11-concrete floor, 12-support column, 13-storage chamber vent inlet, 14-storage chamber bottom air duct, 15-storage chamber top air duct, 16-storage chamber concrete side wall, 17-storage hall floor, and 18-double-layer storage well device.
Detailed Description
The invention is further described below with reference to the figures and examples.
The invention provides a double-layer storage well device (shown in figure 1) for product cups of radioactive substances, wherein the double-layer storage well device 18 is in a straight cylinder shape, is vertically arranged in a storage chamber for storing the product cups 6, and comprises an inner cylinder 1 for fixedly containing the product cups 6 and an outer cylinder 2 sleeved on the periphery of the inner cylinder 1, the outer cylinder 2 is used for air diversion and heat radiation shielding, a spiral gas flow channel for heat radiation is arranged between the inner cylinder 1 and the outer cylinder 2, and the product cups 6 are glass solidified bodies for storing the radioactive substances.
As shown in fig. 2 and 3, the outer surface of the inner cylinder 1 is wound with the spiral flow deflector 3, the outer surface of the inner cylinder 1, the inner surface of the outer cylinder 2 and the spiral flow deflector 3 together form a spiral gas flow passage, and the spiral flow deflector 3 is connected with the inner cylinder 1 and the outer cylinder 2 by welding.
A plurality of vent holes 4 are formed in the wall of the inner barrel 1, and the number of the vent holes 4 is gradually increased from the bottom end to the top end of the inner barrel 1; on the top of inner tube 1, 360 degrees circumference evenly set up ventilation hole 4.
As shown in fig. 4 and 5, the top end of the inner cylinder 1 and the top end of the outer cylinder 2 are hermetically connected together through a heat insulating material sealing plug 5 to form the top end of a double-layer storage well device 18, the opening at the top end of the inner cylinder 1 is used as a top vent 8 of the double-layer storage well device 18, a through hole corresponding to the top vent 8 is arranged on the concrete ceiling 10 of the storage chamber, and the top vent 8 is arranged (fixed) in the concrete ceiling 10 of the storage chamber through the through hole; the top ends of the inner cylinder 1 and the outer cylinder 2 are isolated from the concrete ceiling 10 by a heat insulation material sealing plug 5.
The bottom end of the inner cylinder 1 and the bottom end of the outer cylinder 2 are arranged on a bottom supporting seat 7, the bottom supporting seat 7 (see figure 6) is of an annular structure provided with supporting columns 12, the inner cylinder 1 and the outer cylinder 2 are fixed through the bottom supporting seat 7 to form the bottom end of a double-layer storage well device 18, an opening of the bottom end of the inner cylinder 1 and a hollow part of the bottom supporting seat 7 are used as a bottom ventilation opening 9 of the double-layer storage well device 18 together, and the bottom supporting seat 7 is also used for supporting a product cup 6 stored in the inner cylinder 1 through the supporting columns 12; the lower surface of the bottom support base 7 is arranged on a concrete floor 11 of the storage chamber, and the concrete floor 11 is provided with a through hole corresponding to the bottom vent 9 for air flow to enter the inner cylinder 1.
A gap of 10mm-20mm is kept between the inner surface of the inner cylinder 1 and the cup body of the product cup 6, and the gap between the inner cylinder 1 and the outer cylinder 2 is 100-200mm.
The material of the heat insulation material sealing plug 5 is an expanded perlite product; the expanded perlite product has the advantages of higher allowable use temperature than the maximum temperature of the outer surface of the product cup 6, small density, low thermal conductivity and good combination with concrete.
The inner cylinder 1, the outer cylinder 2, the spiral flow deflector 3 and the bottom support seat 7 are made of stainless steel, the wall thickness of the inner cylinder 1 is 5-10mm, and the wall thickness of the outer cylinder 2 is 2-5mm.
Finally, specific applications of the present invention are used for further detailed description.
As shown in fig. 7, the double-deck storage well device 18 (hereinafter referred to as "well") for product cups for radioactive materials provided by the present invention is disposed in a storage room disposed below a storage hall floor 17. The wind from the fan enters the storage chamber descending ventilation channel from the storage chamber ventilation inlet 13, then reaches the storage chamber bottom air channel 14, and enters the bottom ventilation opening 9 of the shaft through the through hole on the storage chamber bottom plate 11 (concrete). One part of cooling air flows upwards along a gap between the product cup 6 and the inner cylinder 1 of the shaft to take away heat generated by the product cup 6, meanwhile, the other part of cooling air flows upwards through a spiral gas flow channel between the inner cylinder 1 and the outer cylinder 2 of the shaft, and the cooling air generates secondary circulation under the action of the spiral flow deflector 3 in the flowing process to enhance heat exchange. Air flowing up from the gap between the product cup 6 and the inner barrel 1 of the shaft flows directly out of the top vent 8 at the top of the shaft to the storage chamber top air duct 15. The air which flows upwards from the spiral gas flow channel between the inner cylinder 1 and the outer cylinder 2 of the shaft flows upwards and simultaneously enters the flow area between the product cup 6 and the inner cylinder 1 of the shaft through the vent hole 4 on the inner cylinder 1, so that the turbulence degree of the air is enhanced. When air which flows upwards from a spiral gas flow passage between the inner cylinder 1 and the outer cylinder 2 of the shaft reaches the top of the shaft, the air cannot directly flow to the top air duct 15 of the storage chamber due to the existence of the heat insulation material sealing plug 5, and the air needs to enter the top air duct 15 of the storage chamber through a plurality of vent holes 4 which are circumferentially arranged at the top of the inner cylinder 1. The cooling air entering the air duct 15 at the top of the storage chamber enters the external environment through the exhaust fan room or the exhaust chimney.
The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (8)
1. A double-layer storage well device for storing radioactive substance product cups is characterized in that: the appearance of double-deck storage well device (18) is straight tube-shape, sets up perpendicularly in the storage chamber that is used for depositing product cup (6), including being used for holding inner tube (1) and the cover of product cup (6) are established inner tube (1) outlying urceolus (2), inner tube (1) with be equipped with between urceolus (2) and be used for radiating heliciform gas flow channel, product cup (6) are the glass solidification body that is used for depositing radioactive substance.
2. A double-deck storage well device for storing radioactive product cups, as claimed in claim 1, wherein: the spiral flow deflector (3) is wound on the outer surface of the inner barrel (1), the inner surface of the outer barrel (2) and the spiral flow deflector (3) jointly form a spiral gas flow channel, and the spiral flow deflector (3) is connected with the inner barrel (1) and the outer barrel (2) together through welding.
3. A double-deck storage well device for radioactive product cups, as claimed in claim 2, wherein: the inner cylinder is characterized in that a plurality of vent holes (4) are formed in the cylinder wall of the inner cylinder (1), and the number of the vent holes (4) is gradually increased from the bottom end to the top end of the inner cylinder (1); the top of inner tube (1), 360 degrees circumference evenly set up ventilation hole (4).
4. A double-deck storage well assembly for storing radioactive product cups as claimed in claim 3, wherein: the top end of the inner cylinder (1) and the top end of the outer cylinder (2) are hermetically connected together through a heat insulation material sealing plug (5) to form the top end of the double-layer storage well device (18), the opening of the top end of the inner cylinder (1) serves as a top vent (8) of the double-layer storage well device (18), a through hole corresponding to the top vent (8) is formed in a concrete ceiling (10) of the storage chamber, and the top vent (8) is arranged in the concrete ceiling (10) of the storage chamber through the through hole; the top ends of the inner cylinder (1) and the outer cylinder (2) are isolated from the concrete ceiling (10) through the heat insulation material sealing plug (5).
5. The double-deck storage well device for storing radioactive product cups as claimed in claim 4, wherein: the bottom end of the inner cylinder (1) and the bottom end of the outer cylinder (2) are arranged on a bottom supporting seat (7), the bottom supporting seat (7) is of an annular structure provided with supporting columns (12), the inner cylinder (1) and the outer cylinder (2) are fixed through the bottom supporting seat (7) to form the bottom end of the double-layer storage well device (18), an opening in the bottom end of the inner cylinder (1) and a hollow part of the bottom supporting seat (7) are used as bottom ventilation openings (9) of the double-layer storage well device (18) together, and the bottom supporting seat (7) is further used for supporting the product cups (6) stored in the inner cylinder (1) through the supporting columns (12); the lower surface of the bottom supporting seat (7) is arranged on a concrete floor (11) of the storage chamber, and a through hole corresponding to the bottom vent (9) is formed in the concrete floor (11) and used for enabling air flow to enter the inner barrel (1).
6. The dual-level storage well device for product cups of radioactive material of claim 5, wherein: a gap of 10-20 mm is kept between the inner surface of the inner cylinder (1) and the cup body of the product cup (6), and the gap between the inner cylinder (1) and the outer cylinder (2) is 100-200mm.
7. The dual-level storage well device for product cups of radioactive material of claim 4, wherein: the material of the heat insulation material sealing plug (5) is an expanded perlite product.
8. The double-deck storage well device for storing radioactive product cups as claimed in claim 5, wherein: the inner cylinder (1), the outer cylinder (2), the spiral flow deflector (3) and the bottom support seat (7) are made of stainless steel, the wall thickness of the inner cylinder (1) is 5-10mm, and the wall thickness of the outer cylinder (2) is 2-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437277.5A CN115265258A (en) | 2022-04-21 | 2022-04-21 | Double-layer storage well device for storing radioactive substance product cups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210437277.5A CN115265258A (en) | 2022-04-21 | 2022-04-21 | Double-layer storage well device for storing radioactive substance product cups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115265258A true CN115265258A (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210437277.5A Pending CN115265258A (en) | 2022-04-21 | 2022-04-21 | Double-layer storage well device for storing radioactive substance product cups |
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| Country | Link |
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| CN (1) | CN115265258A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867904A (en) * | 1996-04-04 | 1999-02-09 | Zexel Usa Corporation | Method of making an automotive heat exchanger with indented pins |
| CN101893361A (en) * | 2009-05-22 | 2010-11-24 | 博西华家用电器有限公司 | Refrigerator |
| CN103322567A (en) * | 2012-03-22 | 2013-09-25 | 爱烙达股份有限公司 | Flame combustion device |
| KR20170002517A (en) * | 2014-05-02 | 2017-01-06 | 에이에스엠엘 네델란즈 비.브이. | Reduction of hotspots of dense features |
| CN207329297U (en) * | 2017-10-18 | 2018-05-08 | 合肥职业技术学院 | A kind of tea packaging box |
| CN211482734U (en) * | 2020-01-08 | 2020-09-15 | 毕迎斌 | Cooling device for processing shrimp tails |
| CN211919686U (en) * | 2020-03-23 | 2020-11-13 | 于都葱绿农业开发有限公司 | Storage device that tea-oil camellia ventilation dehumidification was used |
-
2022
- 2022-04-21 CN CN202210437277.5A patent/CN115265258A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867904A (en) * | 1996-04-04 | 1999-02-09 | Zexel Usa Corporation | Method of making an automotive heat exchanger with indented pins |
| CN101893361A (en) * | 2009-05-22 | 2010-11-24 | 博西华家用电器有限公司 | Refrigerator |
| CN103322567A (en) * | 2012-03-22 | 2013-09-25 | 爱烙达股份有限公司 | Flame combustion device |
| KR20170002517A (en) * | 2014-05-02 | 2017-01-06 | 에이에스엠엘 네델란즈 비.브이. | Reduction of hotspots of dense features |
| CN207329297U (en) * | 2017-10-18 | 2018-05-08 | 合肥职业技术学院 | A kind of tea packaging box |
| CN211482734U (en) * | 2020-01-08 | 2020-09-15 | 毕迎斌 | Cooling device for processing shrimp tails |
| CN211919686U (en) * | 2020-03-23 | 2020-11-13 | 于都葱绿农业开发有限公司 | Storage device that tea-oil camellia ventilation dehumidification was used |
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