CN114854434A - Waste gas cooling and white matter eliminating system for wet quenching - Google Patents
Waste gas cooling and white matter eliminating system for wet quenching Download PDFInfo
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- CN114854434A CN114854434A CN202210466580.8A CN202210466580A CN114854434A CN 114854434 A CN114854434 A CN 114854434A CN 202210466580 A CN202210466580 A CN 202210466580A CN 114854434 A CN114854434 A CN 114854434A
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- 238000010791 quenching Methods 0.000 title claims abstract description 60
- 230000000171 quenching effect Effects 0.000 title claims abstract description 60
- 239000002912 waste gas Substances 0.000 title claims abstract description 33
- 238000001816 cooling Methods 0.000 title claims abstract description 15
- 210000004885 white matter Anatomy 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000498 cooling water Substances 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 18
- 239000002826 coolant Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 7
- 230000002087 whitening effect Effects 0.000 claims description 7
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 239000000571 coke Substances 0.000 abstract description 34
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 239000000428 dust Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- FMMWHPNWAFZXNH-UHFFFAOYSA-N Benz[a]pyrene Chemical compound C1=C2C3=CC=CC=C3C=C(C=C3)C2=C2C3=CC=CC2=C1 FMMWHPNWAFZXNH-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- 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
- C10B39/00—Cooling or quenching coke
- C10B39/04—Wet quenching
- C10B39/08—Coke-quenching towers
-
- 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
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- 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
- C10B43/02—Removing incrustations
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention provides a waste gas cooling and white removing system for wet quenching, which comprises a quenching tower main body, a sprayer and a filtering screen; the system also comprises a blower, a two-stage condenser, a water inlet pump, a pipeline and an air duct; the two-stage condenser is fixed at the top end of the coke quenching tower main body and covers the top opening of the coke quenching tower main body; the air blower is arranged on one side of the two-stage condenser and used for conveying air into the two-stage condenser; the water inlet pump is arranged on one side of the two-stage condenser and used for conveying circulating cooling water into the two-stage condenser; the air duct is fixed at the top end of the two-stage condenser and communicated with the two-stage condenser, an opening is formed in the side wall of the air duct, and an upward bent pipeline is fixedly connected to the opening and faces towards the inner side of the air duct; the pipeline sets up the opposite side relative with the fan at two-stage formula condenser, the entry end and the two-stage formula condenser of pipeline are linked together, and the exit end of pipeline is linked together through opening and pipeline on the wind channel lateral wall.
Description
Technical Field
The invention relates to the technical field of wet quenching, in particular to a waste gas cooling and white elimination system for wet quenching.
Background
Coke quenching is one of the important processes for producing coke in the coking industry, wherein dry coke quenching has the advantages of energy conservation, environmental protection, improvement on coke quality and the like compared with traditional wet coke quenching, but due to the complex implementation process and high construction and operation cost, enterprises applying dry coke quenching often can be equipped with a wet coke quenching device as a standby device for maintenance and fault. Therefore, the capacity of the traditional wet quenching technology with simple process and low investment cost still exceeds 50 percent in China. The wet quenching method is characterized in that water is directly sprayed on coke at about 1000 ℃ to extinguish the coke and quickly cool the coke, a large amount of heat is released from the coke in the process to quickly gasify water, and air, dust particles and SO are entrained by water vapor under the action of buoyancy 2 And pollutants such as benzopyrene, volatile phenol and the like flow to the top of the coke quenching tower. The trapping device arranged on the top of the coke quenching tower can basically remove dust particles and liquid drops, but water-soluble pollutants cannot be removed, and water is analyzed out after wet saturated steam at the outlet of the top of the coke quenching tower is cooled by the ambient temperature to form white smoke plume in the atmosphere, so that the environment-friendly requirement is not met, and the waste of water resources is also caused. Therefore, there is an urgent need for an exhaust gas cooling and whitening system for wet quenching.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a waste gas cooling and white elimination system for wet quenching.
In order to achieve the purpose, the invention adopts the following technical scheme:
a waste gas cooling and white elimination system for wet quenching comprises a quenching tower main body, a sprayer and a filtering screen; the top of the coke quenching tower main body is provided with an opening, the sprayer is fixed on the lower side in the coke quenching tower main body, and the filtering screen is fixed on the upper side in the coke quenching tower main body;
the system also comprises a blower, a two-stage condenser, a water inlet pump, a pipeline and an air duct; the two-stage condenser is fixed at the top end of the coke quenching tower main body and covers the top opening of the coke quenching tower main body; the air blower is arranged on one side of the two-stage condenser and conveys air into the two-stage condenser; the water inlet pump is arranged on one side of the two-stage condenser and used for conveying circulating cooling water into the two-stage condenser; the air duct is fixed at the top end of the two-stage condenser and communicated with the two-stage condenser, an opening is formed in the side wall of the air duct, and an upward bent pipeline is fixedly connected to the opening and faces towards the inner side of the air duct; the pipeline sets up the opposite side relative with the fan at two-stage formula condenser, the entry end and the two-stage formula condenser of pipeline are linked together, and the exit end of pipeline is linked together through opening and pipeline on the wind channel lateral wall.
In order to optimize the technical scheme, the specific measures adopted further comprise:
furthermore, the two-stage condenser consists of a plurality of condenser units, each condenser unit comprises a vertical waste gas channel and a horizontal cooling medium channel which are arranged at intervals in a layered manner, and further comprises a seal and a partition plate; the waste gas channel and the cooling medium channel are layered through the partition plate, and the left end and the right end of the waste gas channel and the upper end and the lower end of the cooling medium channel are both fixed with sealing strips; the cooling medium channel comprises an air channel, a cooling water channel and a baffle plate, and the baffle plate is arranged in the middle of the cooling medium channel and used for separating the air channel from the cooling water channel; the inlet end of the pipeline is communicated with the air channel; the air duct is communicated with the waste gas channel.
Furthermore, staggered fins are arranged in the waste gas channel, the air channel and the cooling water channel.
Furthermore, a wire mesh is arranged at the top of the air duct and used for further removing residual liquid drops, and white smoke plume can be avoided from being generated by discharged waste gas.
Further, a spraying device is arranged in the air duct and used for cleaning the waste gas channel.
Furthermore, the surface of the pipeline is wrapped with a heating and insulating layer, and the heating and insulating layer can discontinuously heat the pipeline in the cold area in the north or in winter in other areas, so that the temperature of air in the pipeline is maintained at a higher level, and the whitening effect is guaranteed.
The invention has the beneficial effects that: the invention provides a waste gas cooling and white elimination system for wet quenching by arranging parts such as a blower, a two-stage condenser, a water inlet pump, a pipeline, an air duct and the like; the air blower conveys air into the air duct through the air channel, the air enters the air duct through the pipeline and is continuously discharged upwards, the waste gas enters the waste gas channel and sequentially exchanges heat with the air and condensed water, and then enters the air duct and is mixed with the hot air after heat exchange under the drainage effect of the air discharged from the air duct, so that white smoke plume is eliminated, and the purpose of environmental protection is realized; in the process, condensed water generated after the waste gas is condensed and dehumidified falls under the action of gravity, spray water used for wet quenching is supplemented, and the purpose of saving water resources is achieved; the heat source adopted by reheating the waste gas after condensation treatment is derived from the heat released during the condensation of the waste gas, thereby achieving the purpose of saving energy consumption.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a two-stage condenser;
FIG. 3 is a graph showing the change in moisture status during the quenching exhaust gas treatment of the present invention;
wherein, 1 is a blower, 2 is a two-stage condenser, 201 is an exhaust gas channel, 202 is an air channel, 203 is a cooling water channel, 204 is a baffle, 205 is a seal, 206 is a partition plate, 3 is a water inlet pump, 4 is a pipeline, 5 is an air channel, 501 is a pipeline, 502 is a spraying device, 6 is a wire mesh, 7 is a quenching tower main body, 8 is a sprayer, and 9 is a filtering wire mesh.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, an exhaust gas cooling and white quenching system for wet quenching comprises a quenching tower main body 7, a sprayer 8 and a filtering screen 9; the top of the quenching tower main body 7 is provided with an opening, the sprayer 8 is fixed on the lower side inside the quenching tower main body 7, and the filtering screen 9 is fixed on the upper side inside the quenching tower main body 7;
the system also comprises an air blower 1, a two-stage condenser 2, a water inlet pump 3, a pipeline 4 and an air duct 5; as shown in fig. 2, the two-stage condenser 2 is fixed on the top end of the quenching tower main body 7 and covers the top opening of the quenching tower main body 7, the two-stage condenser 2 is composed of a plurality of condenser units, each condenser unit comprises a vertical waste gas channel 201 and a horizontal cooling medium channel which are arranged at intervals in a layered manner, and further comprises a seal 205 and a partition 206; the exhaust gas channel 201 and the cooling medium channel are layered through a partition plate 206, and sealing strips 205 are fixed at the left end and the right end of the exhaust gas channel 201 and the upper end and the lower end of the cooling medium channel; the cooling medium channel comprises an air channel 202, a cooling water channel 203 and a baffle 204, wherein the baffle 204 is horizontally arranged in the middle of the cooling medium channel and separates the air channel 202 from the cooling water channel 203; staggered fins are arranged in the waste gas channel 201, the air channel 202 and the cooling water channel 203; the air blower 1 is arranged on one side of the two-stage condenser 2 and conveys air into the two-stage condenser 2; the water inlet pump 3 is arranged on one side of the two-stage condenser 2 and used for conveying circulating cooling water into the two-stage condenser 2; the air duct 5 is fixed at the top end of the two-stage condenser 2 and communicated with the two-stage condenser 2, an opening is formed in the side wall of the air duct 5, an upward bent pipeline 501 is fixedly connected to the opening and faces towards the inner side of the air duct 5, a wire mesh 6 is arranged at the top of the air duct 5, and a spraying device 502 is arranged in the air duct 5; pipeline 4 sets up in the opposite side that two-stage type condenser 2 and fan 1 are relative, pipeline 4's entry end is linked together with air channel 202, and pipeline 4's exit end is linked together through opening and pipeline 501 on 5 lateral walls in wind channel, and pipeline 4 surface parcel has the heating heat preservation
The working principle of the invention is as follows: the coke quenching car conveys the hot coke of about 1000 ℃ to the bottom of a coke quenching tower main body 7, an air blower 1, a water inlet pump 3 and a spraying device 8 are started, spraying water is uniformly sprayed on the hot coke, and the coke quenching process is formally started. The water is quickly gasified after contacting the surface of the coke, and the generated water vapor entrains a large amount of air, dust particles and pollutants generated by coke combustion under the action of buoyancy to form coke quenching waste gas which flows towards the top of the coke quenching tower main body 7. After the waste gas passes through the tower top filtering wire net 9, most dust particles can be filtered and removed, and the waste gas after dust removal enters a waste gas channel 201 of the two-stage condenser 2; under the effect of air-blower 1, blow out the air of high-speed flow in the wind channel, the air flows through air channel 202 after, gets into pipeline 501 in wind channel 5 through pipeline 4 and upwards gushes and goes out, relies on the produced drainage effect of air, and flow resistance can be overcome to waste gas, smoothly passes through two-stage type condenser 2's exhaust gas channel 201. In the process, the waste gas exchanges heat with the air in the air channel 202 and the condensed water in the cooling water channel 203 in sequence, and the waste gas is cooled and separated into a low-temperature wet saturated state after condensation heat exchange, and flows out of the air channel 5. Air sent into the two-stage condenser 2 by the blower 1 is heated by waste gas, then is conveyed into the air duct 5 and is mixed with low-temperature wet saturated waste gas from the two-stage condenser 2, so that the temperature of the waste gas is increased, the moisture content and the relative humidity are reduced, and the waste gas is discharged to the outside after residual liquid drops are removed by the wire mesh 6 at the top of the air duct 5. As shown in fig. 3, about 90 seconds after the coke quenching process is started, the temperature of the coke is reduced to about 250 ℃, the coke quenching process is finished, the spray thrower 8 stops spraying water to the coke, the blower 1 and the water inlet pump 3 stop working, at this time, the spray thrower 502 is opened, and clean water is sprayed into the exhaust gas channel 201 in the two-stage condenser 2. And after the flushing is finished, the spraying device 502 is closed, and residual moisture at the bottom of the quenching tower is recovered and is used for quenching spraying again after treatment.
It should be noted that the terms "upper", "lower", "left", "right", "front", "back", etc. used in the present invention are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the essential changes.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (6)
1. An exhaust gas cooling and white elimination system for wet quenching comprises a quenching tower main body (7), a sprayer (8) and a filtering screen (9); the top of the quenching tower main body (7) is opened, the sprayer (8) is fixed on the lower side in the quenching tower main body (7), and the filtering screen (9) is fixed on the upper side in the quenching tower main body (7);
the device is characterized by further comprising an air blower (1), a two-stage condenser (2), a water inlet pump (3), a pipeline (4) and an air duct (5); the two-stage condenser (2) is fixed at the top end of the quenching tower main body (7) and covers the top opening of the quenching tower main body (7); the air blower (1) is arranged on one side of the two-stage condenser (2) and is used for conveying air into the two-stage condenser (2); the water inlet pump (3) is arranged on one side of the two-stage condenser (2) and is used for conveying circulating cooling water into the two-stage condenser (2); the air duct (5) is fixed at the top end of the two-stage condenser (2) and communicated with the two-stage condenser (2), an opening is formed in the side wall of the air duct (5), and an upward bent pipeline (501) is fixedly connected to the opening and faces towards the inner side of the air duct (5); pipeline (4) set up the opposite side relative in two-stage formula condenser (2) and fan (1), the entry end and the two-stage formula condenser (2) of pipeline (4) are linked together, and the exit end of pipeline (4) is linked together through opening and pipeline (501) on wind channel (5) lateral wall.
2. The exhaust gas cooling and whitening system for wet quenching as claimed in claim 1, wherein the two-stage condenser (2) is composed of a plurality of condenser units, each condenser unit comprises a vertical exhaust gas channel (201) and a horizontal cooling medium channel which are arranged in a layered and spaced manner, and further comprises a seal (205) and a partition (206); the exhaust gas channel (201) and the cooling medium channel are layered through a partition plate (206), and sealing strips (205) are fixed at the left end and the right end of the exhaust gas channel (201) and the upper end and the lower end of the cooling medium channel; the cooling medium channel comprises an air channel (202), a cooling water channel (203) and a baffle plate (204), wherein the baffle plate (204) is arranged in the middle of the cooling medium channel and used for separating the air channel (202) from the cooling water channel (203); the inlet end of the pipeline (4) is communicated with the air channel (202); the air duct (5) is communicated with the waste gas channel (201).
3. The exhaust gas cooling and whitening system for wet quenching as claimed in claim 1, wherein staggered fins are arranged in the exhaust gas channel (201), the air channel (202) and the cooling water channel (203).
4. An exhaust gas cooling and whitening system for wet quenching as claimed in claim 1, characterized in that the top of the air duct (5) is provided with a wire mesh (6).
5. The exhaust gas cooling and whitening system for wet quenching according to claim 1, characterized in that a spraying device (502) is arranged in the air duct (5).
6. The exhaust gas cooling and whitening system for wet quenching as claimed in claim 1, wherein the surface of the pipeline (4) is coated with a heating insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210466580.8A CN114854434B (en) | 2022-04-29 | 2022-04-29 | Waste gas cooling and whitening system for wet quenching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210466580.8A CN114854434B (en) | 2022-04-29 | 2022-04-29 | Waste gas cooling and whitening system for wet quenching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114854434A true CN114854434A (en) | 2022-08-05 |
| CN114854434B CN114854434B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210466580.8A Active CN114854434B (en) | 2022-04-29 | 2022-04-29 | Waste gas cooling and whitening system for wet quenching |
Country Status (1)
| Country | Link |
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| CN (1) | CN114854434B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289585A (en) * | 1979-04-14 | 1981-09-15 | Didier Engineering Gmbh | Method and apparatus for the wet quenching of coke |
| WO2014191079A1 (en) * | 2013-05-27 | 2014-12-04 | Thyssenkrupp Industrial Solutions Ag | Method and device for reducing leaks on inlets and outlets of a wet quenching tower |
| CN204752617U (en) * | 2015-06-08 | 2015-11-11 | 邢台旭阳煤化工有限公司 | Wet quenching system |
| CN110257086A (en) * | 2019-07-25 | 2019-09-20 | 沈阳东大山汇环境科技有限公司 | A kind of coke wet quenching device and method of emission-free discharge |
| CN210012811U (en) * | 2018-12-05 | 2020-02-04 | 杨玉亭 | Intelligent fully-closed wet quenching and comprehensive recycling equipment |
| CN110935279A (en) * | 2019-12-19 | 2020-03-31 | 济宁明升新材料有限公司 | Heat pump type white smoke eliminating device and method thereof |
| CN211255813U (en) * | 2019-11-07 | 2020-08-14 | 浙江鼎诚环保科技有限公司 | Energy-concerving and environment-protective type wet quenching tower |
-
2022
- 2022-04-29 CN CN202210466580.8A patent/CN114854434B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289585A (en) * | 1979-04-14 | 1981-09-15 | Didier Engineering Gmbh | Method and apparatus for the wet quenching of coke |
| WO2014191079A1 (en) * | 2013-05-27 | 2014-12-04 | Thyssenkrupp Industrial Solutions Ag | Method and device for reducing leaks on inlets and outlets of a wet quenching tower |
| CN204752617U (en) * | 2015-06-08 | 2015-11-11 | 邢台旭阳煤化工有限公司 | Wet quenching system |
| CN210012811U (en) * | 2018-12-05 | 2020-02-04 | 杨玉亭 | Intelligent fully-closed wet quenching and comprehensive recycling equipment |
| CN110257086A (en) * | 2019-07-25 | 2019-09-20 | 沈阳东大山汇环境科技有限公司 | A kind of coke wet quenching device and method of emission-free discharge |
| CN211255813U (en) * | 2019-11-07 | 2020-08-14 | 浙江鼎诚环保科技有限公司 | Energy-concerving and environment-protective type wet quenching tower |
| CN110935279A (en) * | 2019-12-19 | 2020-03-31 | 济宁明升新材料有限公司 | Heat pump type white smoke eliminating device and method thereof |
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| Publication number | Publication date |
|---|---|
| CN114854434B (en) | 2024-01-26 |
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