CN113503725B - Circulation drying system for drying denitration agent by using natural gas heat source - Google Patents
Circulation drying system for drying denitration agent by using natural gas heat source Download PDFInfo
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- CN113503725B CN113503725B CN202110725409.XA CN202110725409A CN113503725B CN 113503725 B CN113503725 B CN 113503725B CN 202110725409 A CN202110725409 A CN 202110725409A CN 113503725 B CN113503725 B CN 113503725B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a circulating drying system for drying a denitration agent by using a natural gas heat source, which comprises a drying chamber, wherein the circulating drying system comprises: the air guide module, the heat exchange module, the heating module, the measuring module, the air return module and the air outlet module; the air guide module is used for distributing the air quantity blown into each part of the drying chamber from the air outlet; the heating module is used for fully combusting natural gas to generate CO)And H)O, and the heat exchange module is communicated to provide a heat source for the heat exchange module; the heat exchange module exchanges heat energy of all high-temperature gas generated after the natural gas is combusted through the heat exchange module in a gas heating mode; the measuring module is used for measuring the temperature and the humidity in the drying chamber so as to monitor the temperature and humidity change in the chamber; the air return module is used for returning air to the hot air in the drying chamber and then reheating the hot air; the air outlet module is used for sending hot air generated by the heat exchange module into the drying chamber. Through the air guide module, the drying speed of the catalyst in the drying chamber is consistent, and the catalyst can be independently and rapidly dried in local areas.
Description
Technical Field
The invention relates to the technical field of drying treatment, in particular to a circulating drying system for drying a denitration agent by using a natural gas heat source.
Background
The natural gas is used as a primary drying heat source, the air is heated, and then the molded and extruded wet denitration catalyst blank is dried by circulating hot air, generally, the drying is carried out at the temperature of 20-30 ℃, and the self-heating material containing titanium dioxide in the components can generate heat to 90 ℃. The traditional heating mode adopts raw coal and heavy oil as fuels, the fuels can generate harmful substances such as sulfur dioxide, smoke dust, carbon dioxide and the like in the combustion process, the direct combustion heating can influence the product quality and pollute the air, and potential safety hazards exist, so that the traditional indirect heat exchange mode can be only adopted. The indirect heat exchange mode determines that the heat loss is large and the energy utilization efficiency is relatively low.
Compared with the natural gas direct-fired hot air heating technology, the natural gas direct-fired hot air heating technology has the following characteristics: firstly, the secondary indirect heating conversion is carried out without the help of heat conduction oil or other heat media, and natural gas is fully combusted in a combustion chamber of the hot blast stove to directly heat circulating air. Therefore, when the denitration catalyst is subjected to drying treatment, the direct-fired heating effect by using natural gas is better; because natural gas contains some impurities and particles can be formed after combustion, if the hot air is directly used for drying the catalyst, the particles can be left on the surface of a product and become an unqualified product, and therefore, all high-temperature gas generated after the natural gas is combusted is subjected to heat exchange by a heat exchanger in a gas heating mode. However, the air outlets of the existing circulating fans are not uniformly distributed, more wind power can be received by the drying agents close to the air outlets, the drying speed of the catalyst in the drying chamber is not uniform, and local rapid drying of the local catalyst in the drying chamber cannot be realized. Therefore, it is necessary to provide a circulation drying system for drying the denitration agent by using a natural gas heat source to solve the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a circulating drying system for drying a denitration agent by using a natural gas heat source, and the specific technical scheme is as follows:
the circulation drying system for drying the denitration agent by using the natural gas heat source comprises a drying chamber, and comprises: the air guide module, the heat exchange module, the heating module, the measuring module, the air return module and the air outlet module;
the air guide module is used for distributing the air quantity blown into each part of the drying chamber by the air outlet;
a heating module for fully combusting natural gas to generate CO)And H)O, and the heat exchange module is communicated to provide a heat source for the heat exchange module;
the heat exchange module is used for exchanging heat energy of all high-temperature gas generated after the natural gas is combusted through the heat exchange module in a gas heating mode;
the measuring module is used for measuring the temperature and the humidity in the drying chamber so as to monitor the temperature and humidity change in the chamber;
the air return module is used for returning air to the hot air in the drying chamber and reheating the hot air;
and the air outlet module is used for sending hot air generated by the heat exchange module into the drying chamber.
As an improvement of the technical scheme, the air outlet module is composed of an air outlet cabinet, the air outlet cabinet is installed at the top of the drying chamber, and an air guide module is arranged on the bottom surface of the air outlet cabinet.
As an improvement of the above technical solution, the air guide module includes an air guide plate and a directional blowing device, the air guide plate and the directional blowing device are arranged at an interval, the air guide plate is connected with the bottom of the air outlet cabinet in a turning manner, the bottom of the air outlet cabinet is provided with a slide rail, and the directional blowing device is connected with the air outlet cabinet in a sliding manner through the slide rail.
As an improvement of the above technical solution, the directional blowing device includes: the device comprises a rotating wheel, an installation block, a winch, an installation frame, an air injection device and an air inlet device; the mounting block is slidably mounted on the slide rail, the four rotating wheels are rotatably mounted on the mounting block and abut against the slide rail, a speed reducing motor is mounted on the mounting block and connected with one rotating wheel, the winch is mounted below the mounting block and connected with the mounting frame, and the mounting frame is fixedly connected with the air injection device.
As an improvement of the above technical solution, the mounting bracket includes: a fixed block, a bearing and an electromagnetic clutch; the fixing block, the bearing and the electromagnetic clutch are arranged in parallel, the fixing block and the bearing are coaxially connected with the electromagnetic clutch, one side of the fixing block is connected with the electromagnetic clutch, and the other side of the electromagnetic clutch is connected with the bearing.
As an improvement of the above technical solution, the air injection device includes: an air jet bucket and a spring; the air injection hopper is fixed at the bottom end of the bearing, the air injection hopper and the bearing rotate coaxially, and the spring is connected with the air injection hopper and the bearing.
As an improvement of the above technical solution, the intake device includes: hoses and sliding blocks; the hose is connected with the top of the air injection hopper, and the sliding block is sleeved on the hose and is slidably mounted on the sliding rail.
As an improvement of the technical scheme, the air return module is an air return pipe arranged on the wall of the drying chamber.
As an improvement of the above technical solution, the measuring module includes a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are installed inside the drying chamber.
Compared with the prior art, the invention has the following technical effects:
the circulating drying system for drying the denitrifying agent by using the natural gas heat source is characterized in that an air guide module is arranged at an air outlet and is divided into an air guide plate and a directional blowing device, and the air guide plate and the directional blowing device are arranged at intervals and cover the top of the whole drying chamber; the aviation baffle can change its guide angle according to actual need, and directional blast apparatus can pass through its position of host computer control to the independent high-efficient jet-propelled drying of specific area, and then can make the indoor catalyst drying rate of drying unanimous, also can be as required to the independent rapid draing in local area simultaneously.
Drawings
FIG. 1 is a schematic view of a partial configuration of a circulation drying system according to the present invention;
fig. 2 is a schematic view of the bottom structure of the air outlet module according to the present invention;
FIG. 3 is a schematic view of a partial structure of the directional outlet mechanism according to the present invention;
FIG. 4 is a schematic view of the attachment of the mounting bracket to the air injection assembly of the present invention;
reference numerals: 10-drying chamber, 20-wind guide module, 30-heating module, 40-heat exchange module, 50-measuring module, 60-return air module, 70-air outlet module, 21-wind guide plate, 22-directional blowing device, 51-temperature sensor, 52-humidity sensor, 61-return air pipe, 71-air outlet cabinet, 72-slide rail, 221-rotating wheel, 222-mounting block, 223-winch, 224-mounting block, 225-air injection device, 226-air injection device, 2241-fixing block, 2242-bearing, 2243-electromagnetic clutch, 2251-air injection bucket, 2252-spring, 2261-hose, 2262-sliding block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Examples
As shown in fig. 1, the circulation drying system for drying the denitration agent by using the natural gas heat source according to the present invention includes a drying chamber 10, and the circulation drying system includes: the air guide module 20, the heat exchange module 40, the heating module 30, the measuring module 50, the air return module 60 and the air outlet module 70; the air guide module 20 is used for distributing air quantity blown into each part of the drying chamber 10 by the air outlet; because natural gas contains some impurities, particles can be formed after combustion, and if the hot air is directly used for drying a base material, the particles can be left on the surface of a product to become an unqualified product, so that all high-temperature gas generated after the natural gas is combusted is subjected to heat exchange by the heat exchange module by utilizing a heat exchanger in the heat exchange module 40 in a gas heating mode; the heating module 30 is used for fully combusting natural gas to generate CO2And H2O, and the heat exchange module 40 is communicated to provide a heat source for the heat exchange module 40; the measuring module 50 is used for measuring the temperature and humidity in the drying chamber 10 so as to monitor the temperature and humidity change in the chamber; the air return module 60 is used for returning air and reheating hot air in the drying chamber 10; the air outlet module 70 is used for sending the hot air generated by the heat exchange module 40 into the drying chamber 10.
The invention relates to a circulating drying system for drying a denitration agent by utilizing a natural gas heat source, wherein an air guide module 20 is arranged at an air outlet, the air guide module 20 is divided into an air guide plate 21 and a directional blowing device 22, and the air guide plate 21 and the directional blowing device 22 are arranged at intervals and cover the top of the whole drying chamber 10; the guide angle of the air deflector 21 can be changed according to actual needs, and the position of the directional blowing device 22 can be controlled by the upper computer, so that independent high-efficiency air injection drying is performed on a specific area, the drying speed of the catalyst in the drying chamber 10 can be consistent, and meanwhile, independent quick drying can be performed on the local area according to needs.
The air outlet module 70 is composed of an air outlet cabinet 71, the air outlet cabinet 71 is installed at the top of the drying chamber 10, and the bottom surface of the air outlet cabinet 71 is provided with an air guide module 20.
The air guide module 20 comprises an air guide plate 21 and a directional blowing device 22, the air guide plate 21 and the directional blowing device 22 are arranged at intervals, the air guide plate 21 is connected with the bottom of an air outlet cabinet 71 in a turning mode, a sliding rail 72 is arranged at the bottom of the air outlet cabinet 71, and the directional blowing device 22 is connected with the air outlet cabinet 71 in a sliding mode through the sliding rail 72.
The air guide plate 21 in the air guide module 20 is rotatably connected with the bottom of the air outlet cabinet 71, so that the air guide angle of the air guide plate 21 can be adjusted according to the distribution condition of the catalyst in the actual drying chamber 10, the drying speed of all the catalysts in the drying chamber 10 is ensured to be constant, the conditions of drying and cracking of some catalysts and the like caused by inconsistent speed are avoided, the directional air blowing device 22 is used for additionally and quickly spraying air for drying the drying agent in a local area, and the air guide module can be used when the drying and forming of the catalyst are different in specification or need to be carried out in a short time.
The directional blowing device 22 includes: a rotating wheel 221, a mounting block 222, a winch 223, a mounting rack 224, an air injection device 225 and an air inlet device 226; the mounting block 222 is slidably mounted on a slide rail, the four rotating wheels 221 are rotatably mounted on the mounting block 222 and abut against the slide rail, a speed reduction motor is mounted on the mounting block 222 and connected with one rotating wheel 221, the winch 223 is mounted below the mounting block 222 and connected with the mounting frame 224, and the mounting frame 224 is fixedly connected with the air injection device 225. The gear motor can select an alternating current gear motor, the winch 223 can select an alternating current winch, the installation block 222 can slide on the sliding rail 72 conveniently through the rotating wheel 221 on the installation block 222, the gear motor drives the rotating wheel 221 to rotate, the installation block 222 is further driven to move, and the installation block 224 can be driven to ascend or descend through the winch 223.
The mounting bracket 224 includes: a fixed block 2241, a bearing 2242 and an electromagnetic clutch 2243; fixed block 2241, bearing 2242 and the parallel setting of electromagnetic clutch 2243, fixed block 2241, bearing 2242 and electromagnetic clutch 2243 coaxial coupling, fixed block 2241 one side links to each other with electromagnetic clutch 2243, electromagnetic clutch 2243 opposite side links to each other with bearing 2242.
The gas injection device 225 includes: air jet 2251, spring 2252; the gas injection bucket 2251 is fixed to the bottom end of the bearing 2242, the gas injection bucket 2251 rotates coaxially with the bearing 2242, and the spring 2252 connects the gas injection bucket 2251 to the bearing 2242. The bearing 2242 can drive the air injection hopper 2251 to coaxially rotate, so as to cope with exhaust gas generated in different directions. The electromagnetic clutch 2243 controls the rotation fixing of the bearing 2242, so that the bearing 2242 can be fixed at an arbitrary angle. The spring 2252 connects the air injection bucket 2251 to the bearing 2242, so that the air injection bucket 2251 can only vibrate within a certain range during operation, thereby effectively enhancing the stability of the air injection bucket 2251 during operation.
The intake device 226 includes: a hose 2261 and a slider 2262; the hose 2261 is connected with the top of the air injection bucket 2251, and the sliding block 2262 is sleeved on the hose 2261 and slidably mounted on the sliding rail 72. The hose 2261 is connected to the air outlet cabinet 71, and can better cooperate with the air injection device 225 to move without affecting the normal operation of the air inlet device 226 by using the characteristics of the hose 2261, the sliding block 2262 is a block structure corresponding to the sliding rail 72 in shape, so that the sliding block 2262 can slide conveniently, and the sliding block 2262 fixes the hose 2261 in a sliding manner, so that the hose 2262 does not excessively droop.
The air return module 60 is an air return pipe 61 arranged on the wall of the drying chamber 10. Can the thermal efficiency be improved through return air module 60, the hot-blast secondary return air circulation heating design that adopts of heating product, when heating replenishing fresh air, the steam secondary return air in the oven reheats, reduces the natural gas quantity, and secondary return air accounts for about 60% of hot-blast total amount in the system. The hot air heated by the system is finally sent into the air box through the induced draft fan, then is uniformly distributed into the drying chamber 10 through the air guide module in the air box, and finally is blown to the surface of the base material to dry the base material.
The measuring module 50 includes a temperature sensor 51 and a humidity sensor 52, and the temperature sensor 51 and the humidity sensor 52 are installed inside the drying chamber 10. The primary drying of the catalyst has the advantages that an airflow field and a temperature field in the drying chamber 10 are strictly controlled, and the real-time temperature and humidity in the drying chamber can be accurately detected through a temperature and humidity sensor.
The circulating drying system for drying the denitration agent by using the natural gas heat source has the following specific regulation principle:
natural gas is piped to the burner and is fully combusted in the direct fired system heating module 30. Because the main component of the natural gas is CH4, CO2 and H2O are generated after the natural gas is fully combusted, the gas generated after the combustion and the introduced air are subjected to heat exchange treatment through the heat exchange module 40, the air subjected to heat exchange is introduced into the drying chamber 10, and the introduced air is uniformly distributed in the drying chamber 10 through the air guide module 20 to perform drying treatment on the catalyst; the hot air in the dried drying chamber 10 enters the direct-fired system again through the air return module 60 for secondary heating, so that the heat exchange efficiency of the system is improved.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. Utilize natural gas heat source to carry out dry circulation drying system of denitrifier, including drying chamber (10), its characterized in that: the circulation drying system comprises: the air-conditioning system comprises an air guide module (20), a heat exchange module (40), a heating module (30), a measuring module (50), an air return module (60) and an air outlet module (70);
the air guide module (20) comprises a directional blowing device (22) and is used for distributing the air quantity of each part blown into the drying chamber (10) from the air outlet;
the directional blowing device (22) comprises a mounting rack (224) for carrying out additional rapid air injection drying on the desiccant in local areas, and can be used when the catalyst and the specification are different or drying and forming are required to be carried out in a short time;
the directional blowing device (22) comprises: the device comprises a rotating wheel (2221), a mounting block (222), a winch (223), an air injection device (225) and an air inlet device (226); the mounting block (222) is slidably mounted on a sliding rail, the four rotating wheels (2221) are rotatably mounted on the mounting block (222) and abut against the sliding rail, a speed reducing motor is mounted on the mounting block (222) and connected with one rotating wheel (2221), the winch (223) is mounted below the mounting block (222) and connected with the mounting frame (224), and the mounting frame (224) is fixedly connected with the air injection device (225);
the mounting frame (224) comprises a fixing block (2241), a bearing (2242) and an electromagnetic clutch (2243); the fixed block (2241), the bearing (2242) and the electromagnetic clutch (2243) are arranged in parallel, the fixed block (2241), the bearing (2242) and the electromagnetic clutch (2243) are coaxially connected, one side of the fixed block (2241) is connected with the electromagnetic clutch (2243), and the other side of the electromagnetic clutch (2243) is connected with the bearing (2242);
a heating module (30) for fully combusting natural gas to produce CO2And H2O, and the heat exchange module (40) is communicated with the heat exchange module (40) to provide a heat source for the heat exchange module (40);
the heat exchange module (40) is used for exchanging heat energy of all high-temperature gas generated after the natural gas is combusted through the heat exchange module (40) in a gas heating mode by the heat exchange module (40);
the measuring module (50) is used for measuring the temperature and the humidity in the drying chamber (10) so as to monitor the temperature and humidity change in the chamber;
the air return module (60) is used for returning air and reheating hot air in the drying chamber (10), the heat efficiency can be improved through the air return module (60), and hot air in the drying box is returned for secondary air and reheated while fresh air is supplemented and heated;
the air outlet module (70) is used for sending the hot air generated by the heat exchange module (40) into the drying chamber (10);
the air outlet module (70) is composed of an air outlet cabinet (71), the air outlet cabinet (71) is installed at the top of the drying chamber (10), and the bottom surface of the air outlet cabinet (71) is provided with an air guide module (20);
the air guide module (20) comprises an air guide plate (21), the air guide plate (21) and the directional blowing device (22) are arranged at intervals, the air guide plate (21) is connected with the bottom of the air outlet cabinet (71) in a turning mode, a sliding rail (72) is arranged at the bottom of the air outlet cabinet (71), and the directional blowing device (22) is connected with the air outlet cabinet (71) in a sliding mode through the sliding rail (72).
2. The cyclic drying system for drying a denitration agent by using a natural gas heat source as claimed in claim 1, wherein: the gas injection device (225) comprises: an air injection bucket (2251) and a spring (2252); the gas injection bucket (2251) is fixed at the bottom end of the bearing (2242), the gas injection bucket (2251) rotates coaxially with the bearing (2242), and the spring (2252) connects the gas injection bucket (2251) with the bearing (2242).
3. The cyclic drying system for drying a denitration agent by using a natural gas heat source as claimed in claim 2, wherein: the intake device (226) includes: a hose (2261) and a slide block (2262); the hose (2261) is connected with the top of the air injection hopper (2251), and the sliding block (2262) is sleeved on the hose (2261) and is slidably mounted on the sliding rail (72).
4. The cyclic drying system for drying a denitration agent by using a natural gas heat source as claimed in claim 1, wherein: the air return module (60) is an air return pipe (61) arranged on the wall of the drying chamber (10).
5. The cyclic drying system for drying a denitration agent by using a natural gas heat source as claimed in claim 1, wherein: the measuring module (50) comprises a temperature sensor (51) and a humidity sensor (52), and the temperature sensor (51) and the humidity sensor (52) are installed inside the drying chamber (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110725409.XA CN113503725B (en) | 2021-06-29 | 2021-06-29 | Circulation drying system for drying denitration agent by using natural gas heat source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110725409.XA CN113503725B (en) | 2021-06-29 | 2021-06-29 | Circulation drying system for drying denitration agent by using natural gas heat source |
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| CN113503725A CN113503725A (en) | 2021-10-15 |
| CN113503725B true CN113503725B (en) | 2022-05-17 |
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| CN115682638A (en) * | 2022-09-30 | 2023-02-03 | 天华化工机械及自动化研究设计院有限公司 | System for be used for dry FCC catalyst drying process |
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| CN213146954U (en) * | 2020-09-18 | 2021-05-07 | 昆山诺贝德仪器设备有限公司 | Air deflector capable of realizing uniform heating and air chamber capable of realizing uniform heating |
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2021
- 2021-06-29 CN CN202110725409.XA patent/CN113503725B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206338937U (en) * | 2016-12-02 | 2017-07-18 | 福建大中城市环保技术有限公司 | A kind of natural gas air heating system |
| CN109954724A (en) * | 2017-12-22 | 2019-07-02 | 桂林市世环废气处理设备有限公司 | A kind of electronic component surface cleaning apparatus |
| CN208676281U (en) * | 2018-04-05 | 2019-04-02 | 刘风敏 | It is a kind of can be to the drying unit that vegetables are sterilized |
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| CN212091358U (en) * | 2020-03-31 | 2020-12-08 | 江苏原元生物工程有限公司 | A waste gas recovery device for bio-feritlizer processing |
| CN212620000U (en) * | 2020-07-20 | 2021-02-26 | 江西瑞顺超细铜线科技协同创新有限公司 | Tinning machine drying equipment |
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| CN113503725A (en) | 2021-10-15 |
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