CN116792756A - Pyrolysis gas heat energy recovery system and heat energy recovery method - Google Patents
Pyrolysis gas heat energy recovery system and heat energy recovery method Download PDFInfo
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- CN116792756A CN116792756A CN202310747198.9A CN202310747198A CN116792756A CN 116792756 A CN116792756 A CN 116792756A CN 202310747198 A CN202310747198 A CN 202310747198A CN 116792756 A CN116792756 A CN 116792756A
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- pyrolysis
- waste gas
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- heat
- fan
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 129
- 238000011084 recovery Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 86
- 239000002912 waste gas Substances 0.000 claims abstract description 86
- 239000007789 gas Substances 0.000 claims abstract description 37
- 238000001035 drying Methods 0.000 claims abstract description 30
- 238000010981 drying operation Methods 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/08—Drying solid materials or objects by processes not involving the application of heat by centrifugal treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Processing Of Solid Wastes (AREA)
- Drying Of Solid Materials (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The pyrolysis gas heat energy recovery system and the heat energy recovery method belong to the technical field of heat energy recovery, and consist of a pyrolysis furnace, a pyrolysis waste gas fan, a pyrolysis heating device and a pyrolysis waste gas treatment device; the heating air pipe is wound outside the pyrolysis furnace and is connected and communicated with the drying bin inside the pyrolysis heating device, and the top of the pyrolysis furnace is connected and communicated with the heating shell; the system provided by the application has a simple structure and a clear working principle, can realize the recycling of the heat on the surface of the pyrolysis furnace, can realize the recycling of the heat of the pyrolysis waste gas, can double-heat the drying bin, can improve the drying operation efficiency in the drying bin, can treat the standard emission of the pyrolysis waste gas, and meets the industry requirements of energy conservation and environmental protection.
Description
Technical Field
The application belongs to the technical field of heat energy recovery, relates to a gas heat energy recovery device and a recovery method, and particularly relates to a device and a heat energy recovery method for heat conversion recovery through pyrolysis waste gas.
Background
At present, most of the treatment modes of the social waste adopt high temperature pyrolysis, and a large amount of heat is dissipated when organic matters such as biomass waste and the like are pyrolyzed, and gas generated by pyrolysis contains a large amount of heat and also contains a large amount of harmful substances, so that the pyrolyzed heat cannot be directly used for processing of edible agricultural products. At present, a large amount of heat energy is needed in the drying or desiccation operation of agricultural products such as fruits, vegetables, mushrooms and the like, so that the problem of gas pollution emission can be solved by recycling harmless heat energy, and the processing requirements of energy conservation and environmental protection of the agricultural products can be met. But at present, heat energy can be greatly dissipated in the waste gas treatment process, the waste gas is almost free of heat after being purified, the heat energy recovery efficiency is extremely low, and the service life of the waste gas treatment device is easily influenced by overheating of the waste gas treatment device after a large amount of heat energy is dissipated.
Disclosure of Invention
The application aims to overcome the defects that the service life of an exhaust gas treatment device is influenced by overheating after a large amount of heat energy is dissipated, and the like in the existing exhaust gas treatment process, and provides a pyrolysis gas heat energy recovery system and a heat energy recovery method, which can effectively complete heat energy recovery and utilization in the process of controlling exhaust gas transmission and improve the exhaust gas treatment efficiency.
The pyrolysis gas heat energy recovery system provided by the application adopts the following technical scheme:
the pyrolysis gas heat energy recovery system comprises a heating fan; the method is characterized in that: the system also comprises a pyrolysis furnace, a pyrolysis waste gas fan, a pyrolysis heating device and a pyrolysis waste gas treatment device;
the pyrolysis heating device is arranged between the pyrolysis furnace and the pyrolysis waste gas treatment device and consists of a heating shell, a draining frame and a rotary chassis; the draining frame and the rotary chassis are both arranged in the heating shell, and the draining frame is driven by the rotary chassis to rotate;
the top of the pyrolysis furnace is provided with a first waste gas outlet, a heating air pipe is wound outside the pyrolysis furnace, one end of the heating air pipe is connected with a heating fan, the other end of the heating air pipe is connected and communicated with an internal drying bin of the pyrolysis heating device through a ventilation channel, and the first waste gas outlet is connected with a heating shell through a pyrolysis waste gas fan;
the bottom of the heating shell is provided with a one-way water outlet and a second waste gas outlet, and the second waste gas outlet is communicated with the pyrolysis waste gas treatment device.
Through adopting above-mentioned technical scheme, through the heat of pyrolysis oven pyrolysis process loss to heat the inside air of heating tuber pipe, in the air input to dry storehouse after the heating, pyrolysis waste gas carries out the integral heating to dry storehouse in taking the heating casing through the fan, can conduct heat fast and treat dry agricultural product in the storehouse and carry out dry operation, and waste gas is full of and is gone into pyrolysis waste gas treatment device from pyrolysis waste gas export after heating the casing, and is outdoor from the exhaust emission mouth discharge after the processing.
Further, the heating air pipe is a metal hose and is spirally and tightly wound outside the pyrolysis furnace, and the spiral angle of the heating air pipe is not more than 15 degrees.
Through adopting above-mentioned technical scheme, metal collapsible tube can with the better laminating of pyrolysis oven, the heating tuber pipe of spiral setting can evenly absorb the heat on pyrolysis oven surface.
Further, the heating shell is made of copper heat conducting materials.
Through adopting above-mentioned technical scheme to do benefit to heat from heating the quick conduction in casing to dry storehouse, promote drying effect in the dry storehouse.
Further, the pyrolysis waste gas fan is arranged at the top of the pyrolysis furnace.
Through adopting above-mentioned technical scheme to directly extract after the high temperature waste gas in the pyrolysis oven discharges and flow to the heating shell in, with preventing the heat loss.
Furthermore, the front and rear parts of the ventilation channel are provided with check valves.
Through adopting above-mentioned technical scheme, realize the unidirectional passage of steam to prevent steam refluence.
Further, an air filtering material is arranged in the ventilation channel.
Through adopting above-mentioned technical scheme to guarantee the inside dustless operation environment in dry storehouse, in order to do benefit to the dry quality that promotes the agricultural product that waits to dry.
Further, the non-return valve comprises a spring shaft, a non-return buckle and a valve main body.
Through adopting above-mentioned technical scheme, make the valve open forward after being blown by hot-blast, it is spacing through the backstop buckle after the spring shaft rebound, better realization steam one-way traffic.
Furthermore, the draining frame is a metal grid product, and has the functions of heat conduction and draining, and water in the agricultural products to be dried is separated out when the rotary chassis rotates.
Through adopting above-mentioned technical scheme, rotatory chassis rotates and drives the draining frame and carry out centrifugal drying, can accelerate the drying of the interior agricultural product of drying warehouse.
A pyrolysis gas heat energy recovery method comprises the following steps:
starting a pyrolysis furnace to carry out incineration pyrolysis, starting a heating fan and a pyrolysis waste gas fan, and heating external hot air by winding a heating air pipe through heat dissipated by the pyrolysis furnace;
external hot air is input into the drying bin through the ventilation channel to carry out drying operation, and meanwhile, the rotary chassis is started to drive the draining frame to rotate to drain and dry;
the pyrolysis waste gas sequentially passes through a first waste gas outlet, an exhaust pipeline, a pyrolysis waste gas fan and an exhaust pipeline to enter a pyrolysis waste gas heating shell; and when the pyrolysis waste gas heating shell is full of gas, the second waste gas outlet is opened to discharge the waste gas which completes the drying operation into the pyrolysis waste gas treatment device, and the waste gas reaches the standard after purification treatment.
Through adopting above-mentioned technical scheme, through pyrolysis oven loss energy heating in dry storehouse inside, high-heat waste gas heating in the heating casing through pyrolysis production, both can make whole dry storehouse temperature promote, and both's heat all obtains better utilization, has promoted dry operating efficiency in energy-concerving and environment-protective operation.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the system provided by the application has a simple structure and a clear working principle, not only can realize the recycling of the heat on the surface of the pyrolysis furnace, but also can realize the recycling of the heat of pyrolysis waste gas, can perform double heating on the drying bin, and can improve the drying operation efficiency in the drying bin.
2. According to the application, the rotary chassis is arranged in the drying bin to drive the draining frame to centrifugally dry, so that the heat recovery drying can be further assisted, and the drying efficiency is accelerated.
3. The application can recover the heat generated by pyrolysis of high-heat waste gas to realize drying operation, and can treat standard emission of pyrolysis waste gas to meet the industry requirements of energy conservation and environmental protection.
Drawings
FIG. 1 is a schematic diagram of the system composition structure of the present application.
Fig. 2 is a schematic view of a ventilation channel structure in the present application.
FIG. 3 is a schematic diagram of a heat recovery drying process according to the present application.
In the figure: the device comprises a heating fan 1, a heating air pipe 2, a pyrolysis furnace 3, a first waste gas outlet 4, an exhaust pipeline 5, a pyrolysis waste gas fan 6, an exhaust pipeline 7, a waste gas inlet 8, a ventilation channel 9, a heating shell 10, a draining frame 11, a rotary chassis 12, a water outlet 13, a second waste gas outlet 14, a pyrolysis waste gas treatment device 15 and a waste gas discharge port 16.
Detailed Description
The present application is further illustrated in the accompanying drawings and detailed description which are to be understood as being merely illustrative of the present application and not limiting the scope of the application, which is defined by the appended claims after reading the present application.
Example 1
As shown in fig. 1, the pyrolysis gas heat energy recovery system consists of a heating fan 1, a pyrolysis furnace 3, a pyrolysis waste gas fan 6, a pyrolysis heating device and a pyrolysis waste gas treatment device 15; the pyrolysis heating device is arranged between the pyrolysis furnace 3 and the pyrolysis waste gas treatment device 15 and consists of a heating shell 10, a draining frame 11 and a rotary chassis 12; the draining frame 11 and the rotary chassis 12 are both arranged in the heating shell 10, the draining frame 11 is driven by the rotary chassis 12 to rotate, the draining frame 11 is made of metal grids, the heat conduction and draining effects are taken into account, and water in agricultural products to be dried is separated out when the rotary chassis 12 rotates; the top of the pyrolysis furnace 3 is provided with a first waste gas outlet 4, the heating air pipe 2 is wound outside the pyrolysis furnace 3, one end of the heating air pipe 2 is connected with the heating fan 1, the other end of the heating air pipe is connected and communicated with an internal drying bin of the pyrolysis heating device through a ventilation channel 9, and the first waste gas outlet 4 is connected and communicated with the heating shell 10 through the pyrolysis waste gas fan 6; the bottom of the heating shell 10 is provided with a one-way water outlet 13 and a second waste gas outlet 14, and the second waste gas outlet 14 is communicated with a pyrolysis waste gas treatment device 15. The heat dissipated in the pyrolysis process of the pyrolysis furnace 3 heats the air in the heating air pipe 2, the heated air is input into the drying bin, the pyrolysis waste gas is pumped into the heating shell through the fan to integrally heat the drying bin, heat can be quickly conducted to dry agricultural products to be dried in the bin, the waste gas is filled in the heating shell 10 and then is led into the pyrolysis waste gas treatment device from the pyrolysis waste gas outlet, and the waste gas is discharged out of the room from the waste gas discharge port 16 after being treated.
Example 2
As shown in fig. 1, in order to uniformly absorb heat on the surface of the pyrolysis furnace, in this embodiment, a heating air pipe 2 spirally wound around the outside of the pyrolysis furnace 3 is used to absorb heat, in order to better attach to the pyrolysis furnace 3, the heating air pipe 2 is a metal hose, and the helix angle of the heating air pipe 2 is 10 °. In order to enable heat to be quickly conducted from the heating housing into the drying chamber, the drying effect in the drying chamber is improved, and the heating housing 10 is made of a copper heat conducting material in the embodiment. In order to facilitate heat dissipation caused by high-temperature exhaust gas in the pyrolysis furnace after being discharged, the pyrolysis exhaust gas fan 6 in the embodiment is arranged at the top of the pyrolysis furnace 3 as much as possible, so as to facilitate rapid drainage of the high-temperature exhaust gas into the heating shell 10 after extraction.
Example 3
As shown in fig. 2, in order to realize unidirectional passage of hot air and prevent backflow of the hot air, in this embodiment, a first check valve and a second check valve are respectively disposed at the upper end and the lower end of the inlet of the ventilation channel 9, a third check valve and a fourth check valve are respectively disposed at the upper end and the lower end of the outlet of the ventilation channel 9, each check valve is composed of a spring shaft 17, a check buckle 18 and a valve main body, the valve is opened forward after being blown open by hot air, and the spring shaft 17 is limited by the check buckle 18 after rebounding so as to realize unidirectional passage of the hot air. In order to ensure a dust-free operation environment in the drying bin, so as to facilitate the improvement of the drying quality of agricultural products to be dried, the embodiment is provided with air filtering materials in the ventilation channel.
As shown in fig. 3, the pyrolysis gas heat recovery and drying principle is as follows:
starting a pyrolysis furnace 3 for incineration pyrolysis, starting a heating fan 1 and a pyrolysis waste gas fan 6, and heating external hot air by winding a heating air pipe 2 through heat dissipated by the pyrolysis furnace 3;
external hot air is input into the drying bin through the ventilation channel 9 to carry out drying operation, and meanwhile, the rotary chassis 12 is started to drive the draining frame 11 to rotate to drain and dry;
the pyrolysis waste gas sequentially passes through a first waste gas outlet 4, an exhaust pipeline 5, a pyrolysis waste gas fan 6 and an exhaust pipeline 7 to enter a pyrolysis waste gas heating shell 10; the second exhaust gas outlet 14 is opened when the pyrolysis exhaust gas heating housing 10 is full of gas, and the exhaust gas after the drying operation is discharged to the pyrolysis exhaust gas treatment device 15, and the exhaust gas reaches the standard after the purification treatment.
Claims (9)
1. The pyrolysis gas heat energy recovery system comprises a heating fan (1); the method is characterized in that: the system also comprises a pyrolysis furnace (3), a pyrolysis waste gas fan (6), a pyrolysis heating device and a pyrolysis waste gas treatment device (15);
the pyrolysis heating device is arranged between the pyrolysis furnace (3) and the pyrolysis waste gas treatment device (15) and consists of a heating shell (10), a draining frame (11) and a rotary chassis (12); the draining frame (11) and the rotary chassis (12) are arranged in the heating shell (10), and the draining frame (11) is driven by the rotary chassis (12) to rotate;
the top of the pyrolysis furnace (3) is provided with a first waste gas outlet (4), a heating air pipe (2) is wound outside the pyrolysis furnace (3), one end of the heating air pipe (2) is connected with a heating fan (1), the other end of the heating air pipe is connected and communicated with a drying bin inside the pyrolysis heating device through a ventilation channel (9), and the first waste gas outlet (4) is connected and communicated with a heating shell (10) through a pyrolysis waste gas fan (6);
the bottom of the heating shell (10) is provided with a one-way water outlet (13) and a second waste gas outlet (14), and the second waste gas outlet (14) is communicated with the pyrolysis waste gas treatment device (15).
2. The pyrolysis gas heat recovery system of claim 1 wherein: the heating air pipe (2) is a metal hose, is spirally and tightly wound outside the pyrolysis furnace (3), and has a spiral angle of no more than 15 degrees.
3. The pyrolysis gas heat recovery system of claim 1 wherein: the heating shell (10) is made of copper heat conducting materials so as to facilitate rapid heat conduction from the heating shell to the drying space.
4. The pyrolysis gas heat recovery system of claim 1 wherein: the pyrolysis waste gas fan (6) is arranged at the top of the pyrolysis furnace (3) so as to conveniently extract high-temperature waste gas and rapidly drain the high-temperature waste gas into the heating shell (10).
5. The pyrolysis gas heat recovery system of claim 1 wherein: and the front and rear parts of the ventilation channel (9) are respectively provided with a check valve so as to prevent the backflow of hot gas.
6. The pyrolysis gas heat recovery system of claim 5 wherein: an air filtering material is arranged in the ventilation channel (9) so as to ensure a dust-free operation environment in the drying bin.
7. The pyrolysis gas heat recovery system of claim 5 wherein: the check valve consists of a spring shaft (17), a check buckle (18) and a valve main body, the valve is opened forwards after being blown open by hot air, and the spring shaft (17) is limited by the check buckle (18) after rebounding, so that the unidirectional passing of the hot air is realized.
8. The pyrolysis gas heat recovery system of claim 1 wherein: the draining frame (11) is a metal grid product, takes heat conduction and draining into account, and separates out water in the agricultural products to be dried when the rotary chassis (12) rotates.
9. A pyrolysis gas thermal energy recovery method, characterized in that the pyrolysis gas thermal energy recovery system according to any one of claims 1-9 is used, the method comprising:
starting a pyrolysis furnace (3) for incineration pyrolysis, starting a heating fan (1) and a pyrolysis waste gas fan (6), and heating external hot air by winding a heating air pipe (2) through heat dissipated by the pyrolysis furnace (3);
external hot air is input into the drying cabin through the ventilation channel (9) to carry out drying operation, and meanwhile, the rotary chassis (12) is started to drive the draining frame (11) to rotate to drain and dry;
the pyrolysis waste gas sequentially passes through a first waste gas outlet (4), an exhaust pipeline (5), a pyrolysis waste gas fan (6) and an exhaust pipeline (7) to enter a pyrolysis waste gas heating shell (10); when the pyrolysis waste gas heating shell (10) is full of gas, the second waste gas outlet (14) is opened, waste gas after the drying operation is discharged into the pyrolysis waste gas treatment device (15), and the waste gas reaches the standard after purification treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310747198.9A CN116792756A (en) | 2023-06-25 | 2023-06-25 | Pyrolysis gas heat energy recovery system and heat energy recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310747198.9A CN116792756A (en) | 2023-06-25 | 2023-06-25 | Pyrolysis gas heat energy recovery system and heat energy recovery method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116792756A true CN116792756A (en) | 2023-09-22 |
Family
ID=88039729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310747198.9A Pending CN116792756A (en) | 2023-06-25 | 2023-06-25 | Pyrolysis gas heat energy recovery system and heat energy recovery method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116792756A (en) |
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2023
- 2023-06-25 CN CN202310747198.9A patent/CN116792756A/en active Pending
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