CN111089285A - Coal material complete combustion device for thermal power plant - Google Patents
Coal material complete combustion device for thermal power plant Download PDFInfo
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- CN111089285A CN111089285A CN202010027970.6A CN202010027970A CN111089285A CN 111089285 A CN111089285 A CN 111089285A CN 202010027970 A CN202010027970 A CN 202010027970A CN 111089285 A CN111089285 A CN 111089285A
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- cavity
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- rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B50/00—Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/24—Drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/16—Over-feed arrangements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a coal complete combustion device for a thermal power plant, which comprises a boiler, wherein a combustion chamber is arranged in the boiler, six lifting chambers are symmetrically arranged at the center of the inner wall of the combustion chamber, an overhead component is arranged on the boiler, the coal complete combustion device adopts a cutting knife structure which can rotate circumferentially and slide back and forth along the diameter direction to crush and accelerate the coal at the bottom, and adopts the combination of a spring and an empty separation frame part.
Description
Technical Field
The invention relates to the technical field of thermal power generation, in particular to a complete coal combustion device for a thermal power plant.
Background
Thermal power generation utilizes fuel to generate heat, heat water to form high-temperature high-pressure superheated steam, then the steam enters a steam turbine along a pipeline to continuously expand to do work, and impacts a rotor of the steam turbine to rotate at a high speed to drive a rotor (an electromagnetic field) of a generator to rotate, and a stator coil cuts magnetic lines of force to generate electric energy.
The traditional coal stove tower burns coal materials incompletely, because the coal materials are piled up together, the air at the bottom is not circulated, and the coal can not be burnt completely, and because the flame influences the sight, the burning condition of internal fuel can not be judged, so timely feeding after the burning of the previous batch of fuel can not be accurate. The present invention sets forth a device that solves the above problems.
Disclosure of Invention
The technical problem is as follows:
the coal material is piled up together, and the air of bottom is not circulated, can't burn completely to because the flame influences the sight, can't judge the burning condition of inside fuel, so can't accurate in time the feed supplement after the burning of previous batch fuel.
In order to solve the problems, the embodiment designs a complete coal combustion device for a thermal power plant, the complete coal combustion device for the thermal power plant comprises a boiler, a combustion chamber is arranged in the boiler, six lifting chambers are arranged on the central symmetry of the inner wall of the combustion chamber, an overhead assembly is arranged on the boiler, the overhead assembly comprises a sliding rod which is connected with the inner wall of the lifting chamber in a sliding manner and extends into the combustion chamber, an overhead rod which is hinged with the sliding rod and provided with a torsion spring, and overhead rings which are hinged with the six overhead rods, the overhead rings and the overhead rods can bear coal and have overhead bottoms, a filling port is arranged on the inner wall of the top end of the combustion chamber in a penetrating manner, the filling port is connected with a valve capable of sealing the filling port, a heat insulation plate positioned at the lower end of the sliding rod is connected in the combustion chamber in a sliding manner, and a first sliding chamber is arranged on the heat insulation plate, the first sliding cavity is connected with a first sealing plate in a sliding mode, a crushing device for cutting coal materials is arranged on the first sealing plate, the crushing device comprises a displacement block fixedly connected with the first sealing plate, a transmission cavity located in the displacement block, a fixed shaft rotationally connected with the transmission cavity, a cutting gear fixedly connected with the fixed shaft and extending to the outer side of the transmission cavity, the cutting gear rotationally cuts and crushes the coal materials, a driving assembly located at the lower end of the heat insulation plate is arranged in the combustion cavity, the driving assembly comprises a transmission shaft rotationally connected with the inner wall of the bottom end of the combustion cavity, a fork rod fixedly connected with the upper end of the transmission shaft, a driven shaft rotationally connected with the fork rod and slidably connected with the displacement block, a driven shaft rotationally connected with the fork rod and located in a driven shaft belt transmission connection mode, and a driving shaft, The driving shaft is provided with a driving shaft, a driving shaft and a driving shaft, wherein the driving shaft is provided with a driving shaft, the driving shaft is provided with a driving shaft driving part and a driving shaft driving part, the.
Preferably, the valve is provided with a receiving groove near the symmetrical center end.
The overhead assembly further comprises an inclined plane push block fixedly connected with the slide rod and located in the lifting cavity, a resistance spring is connected between the inclined plane push block and the inner wall of the lifting cavity, the lifting cavity is close to the side inner wall of the combustion cavity, a second sliding cavity is arranged on the side inner wall of the combustion cavity, a second sealing plate is connected to the second sliding cavity in a sliding mode, a connecting rod extending into the combustion cavity is fixedly arranged on the second sealing plate, an ejector block connected with the valve in a sliding mode is arranged on the connecting rod, and a lifting rod connected with the inclined plane push block in a sliding mode is fixedly arranged on the connecting rod.
The crushing device further comprises a groove located at the lower end of the transmission cavity, a shifting lever is fixedly arranged on the end face of the lower side of the groove, a connecting gear in meshed connection with the cutting gear is connected in the groove in a sliding mode, and the connecting gear is connected with the driven shaft through a spline.
The driving assembly further comprises a rotating barrel fixedly connected with the driving shaft, a wave groove in sliding connection with the shifting rod is formed in the rotating barrel, and the lower end of the driving shaft is in power connection with a motor embedded in the inner wall of the bottom end of the combustion chamber.
The storage assembly comprises a support fixed on the upper side end face of the combustion cavity, the support is fixedly provided with a water storage pipe which can be connected with the accommodating groove in a sliding mode, and the support is fixedly provided with storage boxes which are symmetrical left and right and are centered by the water storage pipe.
The invention has the beneficial effects that: the invention adopts a cutting knife structure which can rotate circumferentially and slide back and forth along the diameter direction to realize the crushing and accelerated combustion of the coal at the bottom, and adopts the combination of a spring and an overhead part, in the combustion process, because the weight of the coal is reduced, the overhead part is lifted to ensure the air circulation of the coal at the bottom to be beneficial to the combustion, in addition, the overhead part is matched with a valve part to realize the automatic material supplementing and the same supplementing quantity of the coal after the coal in the former procedure is completely combusted, thereby ensuring the heat production efficiency of the boiler and ensuring the power supply.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic view showing an overall structure of a complete coal combustion apparatus for a thermal power plant according to the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at "A";
FIG. 3 is a schematic view of the structure in the direction "B-B" of FIG. 1;
FIG. 4 is a schematic view of the structure in the direction "C-C" of FIG. 1.
Detailed Description
The invention will now be described in detail with reference to fig. 1-4, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a coal material complete combustion device for a thermal power plant, which is mainly applied to the process of burning coal materials for thermal power generation, and the invention is further explained by combining the attached drawings of the invention:
the invention relates to a complete coal combustion device for a thermal power plant, which comprises a boiler 11, wherein a combustion chamber 12 is arranged in the boiler 11, six lifting chambers 30 are symmetrically arranged in the center of the inner wall of the combustion chamber 12, an overhead assembly 901 is arranged on the boiler 11, the overhead assembly 901 comprises a sliding rod 47 which is connected with the inner wall of the lifting chamber 30 in a sliding manner and extends into the combustion chamber 12, an overhead rod 38 which is hinged with the sliding rod 47 and is provided with a torsion spring, and an overhead ring 48 which is hinged with the six overhead rods 38, the overhead ring 48 and the overhead rod 38 can bear coal and have an overhead bottom, the inner wall of the top end of the combustion chamber 12 is provided with a filling port 31 in a penetrating manner, the filling port 31 is connected with a valve 29 which can seal the filling port 31 in a rotating manner, the combustion chamber 12 is connected with a heat insulation plate 23 positioned at the lower end of the sliding rod 47 in a sliding manner, the heat insulation plate, the first sliding cavity 40 is connected with a first sealing plate 24 in a sliding manner, a crushing device 902 for cutting coal is arranged on the first sealing plate 24, the crushing device 902 comprises a displacement block 44 fixedly connected with the first sealing plate 24, a transmission cavity 43 positioned in the displacement block 44, a fixed shaft 42 rotatably connected with the transmission cavity 43, a cutting gear 41 fixedly connected with the fixed shaft 42 and extending to the outer side of the transmission cavity 43, the cutting gear 41 rotatably cuts and crushes the coal, a driving component 903 positioned at the lower end of the heat insulation plate 23 is arranged in the combustion cavity 12, the driving component 903 comprises a transmission shaft 14 rotatably connected with the inner wall of the bottom end of the combustion cavity 12, a fork rod 22 fixedly connected with the upper end of the transmission shaft 14, a driven shaft 18 rotatably connected with the forked end of the fork rod 22 and slidably connected with the displacement block 44, and a driving shaft 20 rotatably connected with the forked end of the fork rod 22 and positioned on the driven shaft 18 and in transmission connection with the driven shaft 18, The driving shaft 14 is provided with a helical gear 21 and a helical gear ring 19 which is symmetrically fixed at the left end and the right end of the driving shaft 20, is fixedly connected with the inner wall of the combustion chamber 12 and is in meshed connection with the helical gear 21, the fork rod 22 is rotated by the driving shaft 14, the displacement block 44 is driven to rotate by the driven shaft 18, the driving shaft 20 is rotated by the meshed connection of the helical gear 21 and the helical gear ring 19, the driven shaft 18 is further rotated, and the storage component 904 is arranged at the top end of the combustion chamber 12.
Advantageously, said valve 29 is provided with a housing groove 26 close to the end of symmetry centre.
According to an embodiment, the overhead assembly 901 is described in detail below, the overhead assembly 901 further includes an inclined plane push block 25 fixedly connected to the slide rod 47 and located in the lifting cavity 30, a resistance spring 39 is connected between the inclined plane push block 25 and an inner wall of the lifting cavity 30, a second sliding cavity 36 is disposed on an inner wall of the lifting cavity 30 close to the side of the combustion cavity 12, a second sealing plate 35 is slidably connected to the second sliding cavity 36, a connecting rod 28 extending into the combustion cavity 12 is fixedly disposed on the second sealing plate 35, an ejector block 27 slidably connected to the valve 29 is disposed on the connecting rod 28, a lifting rod 37 slidably connected to the inclined plane push block 25 is fixedly disposed on the connecting rod 28, the inclined plane push block 25 is pushed by the slide rod 47 to slide away from the combustion cavity 12 after the overhead rod 38 is pushed down by coal, so that the inclined plane push block 25 pushes the lifting rod 37 to move up through an inclined plane, the lifting rod 37 passes through the connecting rod 28 and utilizes the sliding of the top block 27 and the valve 29, so that the valve 29 is turned over into the injection port 31, and the same amount of fuel to be combusted in each time is guaranteed.
According to an embodiment, the details of the crushing device 902 are described below, the crushing device 902 further includes a groove 46 located at the lower end of the transmission cavity 43, a shift lever 17 is fixedly disposed on a lower end face of the groove 46, a connecting gear 45 engaged with the cutting gear 41 is slidably connected in the groove 46, the connecting gear 45 is in spline connection with the driven shaft 18, and the driven shaft 18 rotates the cutting gear 41 through the engagement between the connecting gear 45 and the cutting gear 41, so that the cutting gear 41 cuts the coal at the bottom.
According to an embodiment, the driving assembly 903 is described in detail below, the driving assembly 903 further includes a rotating barrel 16 fixedly connected to the driving shaft 20, a wave groove 15 slidably connected to the shift lever 17 is disposed on the rotating barrel 16, a motor 13 embedded in the inner wall of the bottom end of the combustion chamber 12 is dynamically connected to the lower end of the driving shaft 14, and the rotating barrel 16 rotates to slide the shift block 44 left and right through the sliding of the wave groove 15 and the shift lever 17, so as to cut coal at different positions back and forth.
According to the embodiment, the storage assembly 904 is described in detail below, the storage assembly 904 includes a bracket 34 fixed to an upper end surface of the combustion chamber 12, a water storage pipe 32 slidably connected to the accommodating groove 26 is fixed to the bracket 34, storage tanks 33 symmetrically arranged on the bracket 34 and centered on the water storage pipe 32 are fixed to the bracket 32, the water storage pipe 32 is used for storing water, and the storage tanks 33 are used for storing coal.
The following describes in detail the use steps of a coal complete combustion apparatus for a thermal power plant with reference to fig. 1 to 4:
initially, the receiving slot 26 is tilted and the overhead rod 38 lifts the overhead ring 48 up and away from the heat shield 23.
When coal is put into the storage box 33, the coal in the storage box 33 falls to the upper end of the heat insulation plate 23 through the injection port 31 and stays at the upper sides of the overhead rod 38 and the overhead ring 48, the coal pushes the inclined plane push block 25 to slide away from the combustion chamber 12 through the slide rod 47, the resistance spring 39 is squeezed, so that the inclined plane push block 25 pushes the lifting rod 37 to move upwards through the inclined plane, the lifting rod 37 pushes the connecting rod 28 through the connecting rod and utilizes the sliding of the top block 27 and the valve 29, the valve 29 is turned over to the injection port 31, the injection port 31 is sealed by the valve 29 and the water storage pipe 32, the amount of the coal to be combusted in each time is ensured to be the same, and the coal in the combustion chamber 12 is electrically ignited and combusted;
meanwhile, the starting motor 13 rotates the fork rod 22 through the transmission shaft 14, the fork rod 22 rotates the displacement block 44 through the driven shaft 18, and further rotates the cutting gear 41, and the helical gear 21 is engaged with the helical gear ring 19 to rotate the driving shaft 20, so that the driving shaft 20 rotates the driven shaft 18 through belt transmission, the driven shaft 18 rotates the cutting gear 41 through engagement of the engaging gear 45 and the cutting gear 41, and further rotates the cutting gear 41 to cut coal, in addition, the driving shaft 20 rotates the rotary barrel 16, and further the rotary barrel 16 slides through the wave slot 15 and the shift lever 17 to move the displacement block 44 in the first sliding cavity 40, so that cutting and crushing of coal at different positions are realized, combustion is accelerated, water in the water storage pipe 32 is changed into steam to enter the steam turbine to do work and generate electricity, after the coal on the overhead rod 38 and the overhead ring 48 is completely combusted, the weight is reduced, the inclined plane pushing block 25 moves close to the combustion cavity 12 side under the elastic force recovery of the resistance spring 39, the lifting rod 37 moves downwards under the action of gravity, so that the valve 29 turns downwards to open the filling opening 31, and the filling is automatically carried out again.
The invention has the beneficial effects that: the invention adopts a cutting knife structure which can rotate circumferentially and slide back and forth along the diameter direction to realize the crushing and accelerated combustion of the coal at the bottom, and adopts the combination of a spring and an overhead part, in the combustion process, because the weight of the coal is reduced, the overhead part is lifted to ensure the air circulation of the coal at the bottom to be beneficial to the combustion, in addition, the overhead part is matched with a valve part to realize the automatic material supplementing and the same supplementing quantity of the coal after the coal in the former procedure is completely combusted, thereby ensuring the heat production efficiency of the boiler and ensuring the power supply.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.
Claims (6)
1. The utility model provides a complete burner of coal charge that thermal power plant used, includes the boiler, be equipped with the burning chamber in the boiler, burning intracavity wall central symmetry is equipped with six lift chambeies, its characterized in that: an overhead assembly is arranged on the boiler;
the overhead assembly comprises a sliding rod, overhead rods and overhead rings, wherein the sliding rod is connected with the inner wall of the lifting cavity in a sliding mode and extends into the combustion cavity, the overhead rods are hinged with the sliding rod and are provided with torsional springs, the overhead rings are hinged with the six overhead rods, the overhead rods can bear coal and have overhead bottoms, the inner wall of the top end of the combustion cavity is provided with a feed port in a penetrating mode, a valve capable of sealing the feed port is connected in the feed port in a rotating mode, a heat insulation plate is connected to the lower end of the sliding rod in the combustion cavity in a sliding mode, a first sliding cavity is arranged on the heat insulation plate and is connected with a first sealing plate in a sliding mode, and a crushing device for cutting the coal is arranged on the;
the crushing device comprises a displacement block fixedly connected with the first sealing plate, a transmission cavity positioned in the displacement block, a fixed shaft rotatably connected with the transmission cavity, and a cutting gear fixedly connected with the fixed shaft and extending to the outer side of the transmission cavity, wherein the cutting gear is used for cutting and crushing coal materials in a rotating manner, and a driving assembly positioned at the lower end of the heat insulation plate is arranged in the combustion cavity;
the drive assembly comprises a transmission shaft, a fork rod, a driving shaft, a bevel gear ring and a bevel gear ring, wherein the transmission shaft is connected with the inner wall of the bottom end of the combustion chamber in a rotating mode, the fork rod is fixedly connected with the upper end of the transmission shaft, the fork rod is connected with the fork rod in a rotating mode, the driving shaft is connected with the left end of the driving shaft in a belt transmission mode, the bevel gear is symmetrically fixed to the left end and the right end of the driving shaft.
2. The apparatus for complete combustion of coal for thermal power plant according to claim 1, wherein: the valve is close to the symmetric center end and is provided with an accommodating groove.
3. The apparatus for complete combustion of coal for thermal power plant according to claim 1, wherein: the overhead assembly further comprises an inclined plane push block fixedly connected with the slide rod and located in the lifting cavity, a resistance spring is connected between the inclined plane push block and the inner wall of the lifting cavity, the lifting cavity is close to the side inner wall of the combustion cavity, a second sliding cavity is arranged on the side inner wall of the combustion cavity, a second sealing plate is connected to the second sliding cavity in a sliding mode, a connecting rod extending into the combustion cavity is fixedly arranged on the second sealing plate, an ejector block in sliding connection with the valve is arranged on the connecting rod, and a lifting rod in sliding connection with the inclined plane push block is fixedly arranged on the connecting rod.
4. The apparatus for complete combustion of coal for thermal power plant according to claim 1, wherein: the crushing device further comprises a groove located at the lower end of the transmission cavity, a shifting lever is fixedly arranged on the end face of the lower side of the groove, a connecting gear in meshed connection with the cutting gear is connected in the groove in a sliding mode, and the connecting gear is connected with the driven shaft through a spline.
5. The apparatus for complete combustion of coal for thermal power plant according to claim 4, wherein: the driving assembly further comprises a rotating barrel fixedly connected with the driving shaft, a wave groove in sliding connection with the shifting rod is formed in the rotating barrel, and the lower end of the driving shaft is in power connection with a motor embedded in the inner wall of the bottom end of the combustion chamber.
6. The apparatus for complete combustion of coal for thermal power plant according to claim 2, wherein: the storage assembly comprises a support fixed on the upper side end face of the combustion cavity, the support is fixedly provided with a water storage pipe which can be connected with the holding tank in a sliding mode, and the support is fixedly provided with storage boxes which are symmetrical left and right and are centered by the water storage pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027970.6A CN111089285B (en) | 2020-01-10 | 2020-01-10 | Coal material complete combustion device for thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027970.6A CN111089285B (en) | 2020-01-10 | 2020-01-10 | Coal material complete combustion device for thermal power plant |
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| CN111089285A true CN111089285A (en) | 2020-05-01 |
| CN111089285B CN111089285B (en) | 2020-08-25 |
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| CN202010027970.6A Active CN111089285B (en) | 2020-01-10 | 2020-01-10 | Coal material complete combustion device for thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112869538A (en) * | 2021-02-03 | 2021-06-01 | 烟台慧博特产业研究院有限公司 | Open-air chafing dish equipment of portable convenient to add alcohol piece |
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| JP2014142178A (en) * | 2014-04-02 | 2014-08-07 | Toshio Yoshida | Combustion apparatus and combustion method |
| CN204829940U (en) * | 2015-08-14 | 2015-12-02 | 河北金隅红树林环保技术有限责任公司 | Can solid -state half solid -state material processing system of mixing hazardous waste of screening |
| CN206695136U (en) * | 2017-05-08 | 2017-12-01 | 三峡大学 | A kind of refuse burner |
| CN110252495A (en) * | 2019-07-09 | 2019-09-20 | 金华落日新能源科技有限公司 | A kind of Crushing & Screening Machineries of carbonated rare earth |
| CN110375329A (en) * | 2018-04-13 | 2019-10-25 | 李傲 | A kind of thermal power plant Combustion Efficiency of Coal Powder monitoring system |
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2020
- 2020-01-10 CN CN202010027970.6A patent/CN111089285B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014142178A (en) * | 2014-04-02 | 2014-08-07 | Toshio Yoshida | Combustion apparatus and combustion method |
| CN204829940U (en) * | 2015-08-14 | 2015-12-02 | 河北金隅红树林环保技术有限责任公司 | Can solid -state half solid -state material processing system of mixing hazardous waste of screening |
| CN206695136U (en) * | 2017-05-08 | 2017-12-01 | 三峡大学 | A kind of refuse burner |
| CN110375329A (en) * | 2018-04-13 | 2019-10-25 | 李傲 | A kind of thermal power plant Combustion Efficiency of Coal Powder monitoring system |
| CN110252495A (en) * | 2019-07-09 | 2019-09-20 | 金华落日新能源科技有限公司 | A kind of Crushing & Screening Machineries of carbonated rare earth |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112869538A (en) * | 2021-02-03 | 2021-06-01 | 烟台慧博特产业研究院有限公司 | Open-air chafing dish equipment of portable convenient to add alcohol piece |
| CN112869538B (en) * | 2021-02-03 | 2022-01-25 | 浙江鸿泰科技有限公司 | Open-air chafing dish equipment of portable convenient to add alcohol piece |
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| CN111089285B (en) | 2020-08-25 |
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