CN116716120A - Device and method for treating water vapor smoke dust - Google Patents
Device and method for treating water vapor smoke dust Download PDFInfo
- Publication number
- CN116716120A CN116716120A CN202310890976.XA CN202310890976A CN116716120A CN 116716120 A CN116716120 A CN 116716120A CN 202310890976 A CN202310890976 A CN 202310890976A CN 116716120 A CN116716120 A CN 116716120A
- Authority
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- China
- Prior art keywords
- water vapor
- heat exchanger
- smoke dust
- vapor smoke
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 122
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000000428 dust Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011282 treatment Methods 0.000 claims abstract description 43
- 230000017525 heat dissipation Effects 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 239000000571 coke Substances 0.000 claims description 48
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 239000003517 fume Substances 0.000 claims 3
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 230000008569 process Effects 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B33/00—Discharging devices; Coke guides
- C10B33/08—Pushers, e.g. rams
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a device and a method for processing vapor smoke dust, wherein the device comprises a heat exchanger, a heat radiation fan and a filter, wherein the heat exchanger is used for cooling the vapor smoke dust through heat exchange; the heat dissipation fan is arranged on one side of the heat exchanger, and can generate suction effect on the vapor smoke dust so that the vapor smoke dust enters the heat radiator; the filter is arranged on one side, far away from the radiator, of the radiating fan and is used for filtering water vapor smoke dust. Compared with the prior art, the cooling treatment is carried out on the water vapor smoke dust for a plurality of times and in a gradient way through the heat exchanger and the heat dissipation fan in the scheme, and then the water vapor smoke dust is filtered, so that the water vapor smoke dust is treated and then reaches the emission requirement to be emitted.
Description
Technical Field
The invention relates to the technical field of smoke dust, in particular to a device and a method for treating water vapor smoke dust.
Background
In the coking process, after the coke pusher pushes coke to the coke oven, the coke which falls off when the door is picked and remains at the door opening of the oven is called head-to-tail coke, and the head-to-tail coke treatment device is an important component part on the coke pusher or the coke blocking machine. The collection of the coke pushing Che Wei coke of the coke oven of 6 meters is completed by a water flushing type head-tail coke treatment device, and the water flushing type head-tail coke treatment device comprises a water supply device, a separation device, a tail coke conveying pipeline, a circulating system and an electrical control system; the water flushing type head-tail coke treatment device can generate a large amount of water vapor smoke dust in the tail coke collecting process and discharge the water vapor smoke dust into the atmosphere through a chimney.
According to the requirements in the technical guidelines for ultra-low emission modification of iron and steel enterprises, an unorganized emission control technology is selected according to local conditions, and according to the conditions of dust production points and the characteristics of dust pollution, dust collection technical measures are selected according to the local conditions, so that the unorganized emission dust pollution is prevented and treated. At present, after the tail coke is treated by the water flushing type head-tail coke treatment device, the generated water vapor smoke dust does not meet the emission requirement.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a device for treating water vapor and smoke dust, which is used for solving the problem that the discharged water vapor and smoke dust does not meet the requirements after the coke pushing head and tail coke is treated in the prior art.
To achieve the above and other related objects, the present invention provides a device for treating vapor smoke, comprising:
the heat exchanger is used for carrying out cooling treatment on the water vapor smoke dust through heat exchange;
the heat dissipation fan is arranged on one side of the heat exchanger and can generate suction action on the vapor smoke dust so that the vapor smoke dust enters the heat radiator;
and the filter is arranged on one side, far away from the radiator, of the radiating fan and is used for filtering the water vapor smoke dust.
Optionally, the heat exchanger further comprises a shell, the shell wraps the heat exchanger, the heat dissipation fan and the filter to form a ventilation pipeline, the heat dissipation fan is located between the heat exchanger and the filter, and water vapor smoke dust sequentially passes through the heat exchanger, the heat dissipation fan and the filter in the ventilation pipeline.
Optionally, the ventilation pipeline comprises an air inlet and an air outlet, and the air outlet is communicated with a pipeline of the coke pusher.
Optionally, the heat exchanger is connected with a water tank through a water pipe, a circulating water pump is arranged on the water pipe, and the heat exchange area of the heat exchanger is 15 square meters.
Optionally, the heat exchanger includes heat exchange portion and condensing part, the temperature of condensing part is less than the temperature of heat exchange portion, condensing part is close to the cooling fan.
Optionally, the filter adopts activated carbon to filter the water vapor smoke dust.
Optionally, the air inlet is connected with a residual coke bucket, and one side of the Yu Jiaodou is connected with a coke conveying groove.
Optionally, the heat dissipation fan makes the coke conveying groove generate vacuum suction, and the vapor smoke dust enters the ventilation pipeline along the coke conveying groove under the action of the vacuum suction.
Correspondingly, the invention also provides a method for treating the water vapor smoke dust, which adopts the water vapor smoke dust treatment device of any one of the above steps to treat the water vapor smoke dust, and comprises the following steps:
sucking water vapor smoke dust into the heat exchanger by utilizing the suction effect of the heat radiation fan;
at least 2 times of cooling treatment are carried out on the water vapor smoke dust through the heat exchanger, and then cooling treatment is carried out on the water vapor smoke dust through the heat dissipation fan;
the filter filters and cuts the water vapor smoke and discharges the water vapor smoke.
Optionally, the heat exchanger is used for cooling the water vapor smoke at least 2 times, and the cooling fan is used for cooling the water vapor smoke, and the heat exchanger comprises:
and cooling the water vapor smoke dust for at least 2 times through the heat exchanger, wherein the temperature is reduced to below 70 ℃ for the first time, the temperature is reduced to below 50 ℃ for the second time, and the temperature of the water vapor smoke dust is reduced to below 30 ℃ through the heat dissipation fan.
In the scheme that above-mentioned processing apparatus of steam smoke and dust realized, carry out the water towards formula through pushing away burnt car tail and handle the back, produced steam smoke and dust gets into the heat exchanger under the suction effect of radiator fan, cool down the processing through heat exchanger and radiator fan in proper order to the steam smoke and dust, condense the steam in the steam smoke and dust, then carry out filtration treatment through the smoke and dust in the steam smoke and dust, after the processing apparatus of steam smoke and dust in this scheme is handled to the steam smoke and dust, and get rid of into diffuse radiation air current by the cutting in the filtration process, form invisible air current, discharge accords with relevant requirement. Compared with the prior art, the cooling treatment is carried out on the water vapor smoke dust for a plurality of times and in a gradient way through the heat exchanger and the heat dissipation fan in the scheme, and then the water vapor smoke dust is filtered, so that the water vapor smoke dust is treated and then reaches the emission requirement to be emitted.
Drawings
Fig. 1 is a schematic view showing a structure of a treatment apparatus for vapor soot according to an exemplary embodiment.
The reference numerals in the embodiments include:
the coke conveying tank 10, the residual coke bucket 11, the heat exchanger 12, the water pipe 13, the circulating water pump 14, the water tank 15, the heat radiation fan 16, the filter 17 and the shell 18.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Further advantages and effects of the present invention will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In the following description, numerous details are set forth in order to provide a more thorough explanation of embodiments of the present invention, it will be apparent, however, to one skilled in the art that embodiments of the present invention may be practiced without these specific details, in other embodiments, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the embodiments of the present invention.
As shown in fig. 1, in an exemplary embodiment, a treatment apparatus for moisture smoke includes:
the heat exchanger 12 is used for cooling the water vapor smoke dust through heat exchange;
a heat dissipation fan 16 mounted on one side of the heat exchanger 12, wherein the heat dissipation fan 16 can generate suction force on the vapor smoke and dust so as to enable the vapor smoke and dust to enter the heat radiator;
and the filter 17 is arranged on one side, far away from the radiator, of the radiating fan 16 and is used for filtering the water vapor smoke dust.
The heat exchanger 12 has at least two stages of heat exchange functions, and can perform heat reduction treatment at least twice in the process of passing the vapor smoke through the heat exchanger 12, and the heat dissipation fan 16 has a suction force of at least 0.3MPA and can suck the vapor smoke from the heat exchanger 12 and flow the vapor smoke out of the filter 17.
In the specific implementation process, after the coke pushing car tail coke is subjected to water flushing treatment, water and high-temperature water vapor smoke dust generated by coke contact enter the heat exchanger 12 under the suction action of the heat dissipation fan 16, the water vapor smoke dust is subjected to cooling treatment sequentially through the heat exchanger 12 and the heat dissipation fan 16, water vapor in the water vapor smoke dust is condensed, then the smoke dust in the water vapor smoke dust is subjected to filtering treatment, the water vapor smoke dust is subjected to treatment by the treatment device of the water vapor smoke dust in the scheme, the water vapor and the smoke dust are removed, the water vapor smoke dust is cut into diffuse radiation air flow in the filtering process to be discharged, invisible air flow is formed, and the discharge meets relevant requirements.
In some embodiments, the heat exchanger 12, the heat dissipation fan 16 and the filter 17 are surrounded by a casing 18, and the casing 18 forms a ventilation pipeline, the heat dissipation fan 16 is located between the heat exchanger 12 and the filter 17, and water vapor and smoke passes through the heat exchanger 12, the heat dissipation fan 16 and the filter 17 in sequence in the ventilation pipeline.
In the specific implementation process, as shown in fig. 1, the shell 18 forms a ventilation pipeline, and the heat exchange part of the heat exchanger 12, the fan blade part of the heat dissipation fan 16 and the filtering part of the filter 17 are all wrapped in the ventilation pipeline, so that the suction acting force of the heat dissipation fan 16 is in the ventilation pipeline, and can suck and treat the water vapor smoke better, and also can make the heat exchanger 12 perform a better cooling function on the water vapor smoke, so that the filter 17 performs a better filtering and dispersing function on the water vapor smoke.
In some embodiments, the vent conduit includes an air inlet and an air outlet, the air outlet in communication with a conduit of the coke cart. Specifically, after the water vapor smoke dust is treated by the device, the water vapor smoke dust becomes qualified air flow and can enter the coke pusher again to act on the coke pusher.
In some embodiments, the heat exchanger 12 is connected with a water tank 15 through a water pipe 13, a circulating water pump 14 is installed on the water pipe 13, and the heat exchange area of the heat exchanger 12 is 15 square meters. For example, as shown in fig. 1, the water pipe 13, the circulating water pump 14 and the water tank 15 are all located outside the shell 18, and the heat in the water vapor smoke dust is replaced by the water in the water tank 15 flowing in the heat exchanger 12, so that the cooling effect of the water vapor smoke dust is realized.
In some embodiments, the heat exchanger 12 includes a heat exchange portion and a condensing portion, the condensing portion having a temperature lower than the heat exchange portion, the condensing portion being proximate the heat dissipating fan 16. Specifically, through heat exchange portion and condensation portion cooling down to steam smoke and dust in proper order, can realize carrying out twice gradient type's cooling to steam smoke and dust, make the cooling effect of steam smoke and dust good.
In some embodiments, the filter 17 filters the water vapor soot using activated carbon. For example, as shown in fig. 1, the activated carbon can make the water vapor smoke flow out quickly, and can filter and adsorb smoke in the water vapor smoke, so that the effect is better.
In some embodiments, the air inlet is connected with a residual coke bucket 11, and one side of the residual coke bucket 11 is connected with a coke conveying groove 10. For example, as shown in fig. 1, the positions of the Yu Jiaodou and the coke conveying groove 10 relative to the device, namely the position where the device is arranged on the coke pushing car, can be used for timely and rapidly processing vapor smoke dust generated by the head coke and the tail coke of the coke pushing car.
In some embodiments, the heat dissipation fan generates vacuum suction at the coke conveying groove 10, and the vapor dust enters the ventilation pipeline along the coke conveying groove 10 under the action of the vacuum suction. For example, as shown in FIG. 1, the heat dissipation fan 16 provides suction for directing the vapor and smoke in the device, which allows the vapor and smoke to enter the device more quickly for treatment.
In some embodiments, the solution further provides a method for treating water vapor smoke, where the method uses any one of the above-mentioned treatment devices for treating water vapor smoke, and the method includes the following steps:
sucking the vapor dust into the heat exchanger 12 by the suction action of the heat radiation fan;
at least 2 times of cooling treatment are carried out on the water vapor smoke dust through the heat exchanger 12, and then cooling treatment is carried out on the water vapor smoke dust through a heat dissipation fan;
the filter filters and cuts the water vapor smoke and discharges the water vapor smoke.
In some embodiments, the heat exchanger 12 is configured to cool the water vapor dust at least 2 times, and the cooling fan is configured to cool the water vapor dust, including:
the heat exchanger 12 is used for cooling the water vapor smoke at least 2 times, the temperature is reduced to below 70 ℃ for the first time, the temperature is reduced to below 50 ℃ for the second time, and the heat dissipation fan is used for cooling the water vapor smoke to below 30 ℃.
Specifically, the water vapor smoke enters the treatment device under the suction of the heat radiation fan 16, is cooled to below 70 degrees by the heat exchanger 12 (the heat exchange area is 15 square meters), is cooled to below 50 degrees by condensation (the average temperature is 25 ℃), namely, the water vapor smoke is subjected to at least 2 times of cooling treatment by the heat exchanger 12, and the cooling process is gradient cooling. Then, (5) the vapor dust is cooled to <30 ℃ after the vapor dust is subjected to wind tunnel vortex heat dissipation of the heat dissipation fan 16, under the pushing of wind pressure, the vapor at 30 ℃ passes through the activated carbon layer, the vapor is cut into diffuse radiation airflow under the cutting of the irregular honeycomb effect of the activated carbon and is discharged, invisible air flow is formed, and the discharged vapor dust is ensured to be free from environmental pollution caused by the escape of macroscopic vapor and dust.
The method is a treatment method of the water vapor smoke dust formulated by the treatment device in the scheme, and the water vapor smoke dust can be treated by the treatment method, so that the water vapor and the smoke dust in the water vapor smoke dust can be rapidly and effectively filtered, and the water vapor smoke dust can meet the emission requirement.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A device for treating vapor fumes, comprising:
the heat exchanger is used for carrying out cooling treatment on the water vapor smoke dust through heat exchange;
the heat dissipation fan is arranged on one side of the heat exchanger and can generate suction action on the vapor smoke dust so that the vapor smoke dust enters the heat radiator;
and the filter is arranged on one side, far away from the radiator, of the radiating fan and is used for filtering the water vapor smoke dust.
2. The water vapor smoke treatment device according to claim 1, wherein: the heat exchanger comprises a heat exchanger body, a heat dissipation fan, a filter and a shell, wherein the heat exchanger body is arranged on the heat dissipation fan, the heat dissipation fan is arranged on the heat exchanger body, the filter is arranged on the heat dissipation fan body, the shell wraps the heat exchanger body, the heat dissipation fan body and the filter body, the heat dissipation fan body is arranged between the heat exchanger body and the filter body, and water vapor smoke dust sequentially passes through the heat exchanger body, the heat dissipation fan body and the filter body in the air passage.
3. A water vapor smoke treatment device according to claim 2, wherein: the air duct comprises an air inlet and an air outlet, and the air outlet is communicated with the duct of the coke pusher.
4. A water vapor smoke treatment device according to claim 3, wherein: the heat exchanger is connected with a water tank through a water pipe, a circulating water pump is arranged on the water pipe, and the heat exchange area of the heat exchanger is 15 square meters.
5. The water vapor smoke treatment device according to claim 4, wherein: the heat exchanger comprises a heat exchange part and a condensation part, wherein the temperature of the condensation part is lower than that of the heat exchange part, and the condensation part is close to the heat radiation fan.
6. The water vapor smoke treatment device according to claim 1, wherein: the filter adopts active carbon to filter the vapor smoke dust.
7. The water vapor smoke treatment device according to claim 5, wherein: the gas inlet is connected with a residual coke bucket, and one side of the Yu Jiaodou is connected with a coke conveying groove.
8. The water vapor smoke treatment device as defined in claim 7 wherein: the heat radiation fan enables the coke conveying groove to generate vacuum suction, and water vapor and smoke dust enter the ventilation pipeline along the coke conveying groove under the action of the vacuum suction.
9. A method for treating water vapor smoke dust is characterized in that: a method of treating water vapour fumes using a water vapour fume treatment apparatus according to any one of claims 1 to 8, the treatment method comprising the steps of:
sucking water vapor smoke dust into the heat exchanger by utilizing the suction effect of the heat radiation fan;
at least 2 times of cooling treatment are carried out on the water vapor smoke dust through the heat exchanger, and then cooling treatment is carried out on the water vapor smoke dust through the heat dissipation fan;
the filter filters and cuts the water vapor smoke and discharges the water vapor smoke.
10. The method for treating water vapor smoke as defined in claim 9, wherein: at least 2 cooling treatments are carried out on the vapor smoke dust through the heat exchanger, and the cooling treatment is carried out on the vapor smoke dust through the heat radiation fan, and the heat radiation device comprises:
and cooling the water vapor smoke dust for at least 2 times through the heat exchanger, wherein the temperature is reduced to below 70 ℃ for the first time, the temperature is reduced to below 50 ℃ for the second time, and the temperature of the water vapor smoke dust is reduced to below 30 ℃ through the heat dissipation fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310890976.XA CN116716120A (en) | 2023-07-19 | 2023-07-19 | Device and method for treating water vapor smoke dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310890976.XA CN116716120A (en) | 2023-07-19 | 2023-07-19 | Device and method for treating water vapor smoke dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116716120A true CN116716120A (en) | 2023-09-08 |
Family
ID=87868019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310890976.XA Pending CN116716120A (en) | 2023-07-19 | 2023-07-19 | Device and method for treating water vapor smoke dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116716120A (en) |
-
2023
- 2023-07-19 CN CN202310890976.XA patent/CN116716120A/en active Pending
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