CN114102863A - Concrete recycling, cleaning and separating device and method - Google Patents
Concrete recycling, cleaning and separating device and method Download PDFInfo
- Publication number
- CN114102863A CN114102863A CN202111482891.5A CN202111482891A CN114102863A CN 114102863 A CN114102863 A CN 114102863A CN 202111482891 A CN202111482891 A CN 202111482891A CN 114102863 A CN114102863 A CN 114102863A
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- Prior art keywords
- concrete
- cleaning
- water
- screen
- sand
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- 239000004567 concrete Substances 0.000 title claims abstract description 64
- 238000004140 cleaning Methods 0.000 title claims abstract description 26
- 238000004064 recycling Methods 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000005406 washing Methods 0.000 claims abstract description 47
- 239000004575 stone Substances 0.000 claims abstract description 41
- 238000011084 recovery Methods 0.000 claims abstract description 21
- 238000004062 sedimentation Methods 0.000 claims abstract description 20
- 239000010865 sewage Substances 0.000 claims description 34
- 239000004576 sand Substances 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 6
- 239000003973 paint Substances 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 4
- 239000013043 chemical agent Substances 0.000 abstract description 3
- 238000003911 water pollution Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 230000032258 transport Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
- B28C5/4203—Details; Accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/18—Drum screens
- B07B1/20—Stationary drums with moving interior agitators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S3/00—Vehicle cleaning apparatus not integral with vehicles
- B60S3/04—Vehicle cleaning apparatus not integral with vehicles for exteriors of land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention relates to the technical field of concrete recovery equipment, in particular to a concrete recovery, cleaning and separating device which comprises a water supply tank, a car washing platform and a sand-stone separating screen, wherein the car washing platform is used for parking a concrete mixing and transporting vehicle, the sand-stone separating screen is arranged below a discharge port of the concrete mixing and transporting vehicle, the water supply tank supplies water to a feed port of the concrete mixing and transporting vehicle through a pipeline, the sand-stone separating screen is connected with a rotary screen, spiral blades sleeved along a rotating shaft are arranged in the rotary screen, screen holes are formed in the spiral blades, an overflow port is formed in the bottom of the rotary screen, the overflow port is connected with a sedimentation tank through a pipeline, and the sedimentation tank is sequentially connected with a clear water recovery tank and a water supply tank through pipelines. Water pollution detection is not needed; no internal re-detection is required; no chemical agent is added; no waste water outflow, environment protection, resource saving and ecological balance maintenance.
Description
Technical Field
The invention relates to the technical field of concrete recovery equipment, in particular to a concrete recovery, cleaning and separating device and method.
Background
Until now, in most domestic cement concrete production and supply units, waste water from concrete transportation vehicles, concrete mixers, vehicle tires, and the like, and waste concrete, slurry, mortar, and the like are disposed of by burying them in areas around factories or entrusting them to disposal by others. The serious shortage of the landfill site and the increase of the treatment cost are the major problems of the principle of numerous concrete production and supply units, and the waste of water resources is also a waste, so that the environment cannot be protected and the ecological balance cannot be maintained.
Disclosure of Invention
The invention aims to provide a concrete recycling, cleaning and separating device, which does not need water pollution detection in the process of cleaning and treating concrete; no internal re-detection is required; no chemical agent is added; no waste water outflow, and is favorable for protecting the environment.
The invention provides a concrete recycling, cleaning and separating device which comprises a water supply tank, a car washing platform and a sand-stone separating screen, wherein the car washing platform is used for parking a concrete mixing and transporting vehicle, the sand-stone separating screen is arranged below a discharge port of the concrete mixing and transporting vehicle, the water supply tank supplies water to a feed port of the concrete mixing and transporting vehicle through a pipeline, the sand-stone separating screen is connected with a drum screen, spiral blades sleeved along a rotating shaft are arranged inside the drum screen, screen holes are formed in the spiral blades, an overflow port is formed in the bottom of the drum screen, the overflow port is connected with a sedimentation tank through a pipeline, and the sedimentation tank is sequentially connected with a clear water recycling tank and the water supply tank through pipelines.
Preferably, a plurality of washing heads for spraying water upwards are arranged on the car washing platform.
Preferably, a drainage channel with an inclined bottom is arranged below the car washing platform, and a drainage hole communicated with the drainage channel is formed in the car washing platform.
Preferably, the lowest point of the sewer is connected with the sand separating screen through a pipeline.
Preferably, the spiral blade is sprayed with a paint film.
Preferably, the paint film thickness is 120 mm.
Preferably, the trommel is positioned at an elevation to the horizontal.
Preferably, the pipelines are provided with slurry pumps.
Preferably, the concrete recovery, cleaning and separation device is automatically controlled by a PLC system.
The invention also provides a concrete recycling and cleaning method based on the concrete recycling and cleaning separation device, which comprises the following steps:
step (1): the concrete mixing and transporting vehicle is parked on a vehicle washing platform, a washing head is used for washing the vehicle body, a water supply pool is used for supplying water to wash the interior of the mixing drum, the sewage after washing the drum wall and the sewage after washing the vehicle body are converged into a sand-stone separating screen, and the sand-stone separating screen works to discharge stones;
step (2): discharging the sewage from which the stones are removed to a drum screen, and separating sand from the sewage by the drum screen;
and (3): and conveying the sewage from which the stones and the sands are separated into a sedimentation tank, conveying the supernatant into a clarified water recovery tank for storage after sedimentation, discharging water in the clarified water recovery tank to a water supply tank, and continuously providing a water source for cleaning the concrete mixing and transporting truck by the water supply tank to form circulation.
Has the advantages that:
according to the invention, the sewage for cleaning concrete is recycled and treated uniformly, stones are removed through a sand-stone separation sieve, then sand in the sewage is overturned when the sewage passes through a drum sieve, water and the sand are separated through sieve pores, the sand is discharged from an outlet of the drum sieve by virtue of the power of upward rotation of a helical blade, the sewage is discharged into a sedimentation tank at an overflow port, and then the sewage sequentially passes through a clear water recovery tank and a water supply tank to form circulation, so that the concrete mixing transport vehicle can be continuously washed without water pollution detection; no internal re-detection is required; no chemical agent is added; no waste water outflow, environment protection, resource saving and ecological balance maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the apparatus of the present invention;
description of reference numerals: 1-a water supply tank, 2-a car washing platform, 3-a sand-stone separating sieve, 4-a rotary sieve, 5-a helical blade, 6-an overflow port, 7-a sedimentation tank, 8-a clear water recovery tank, 9-a washing head, 10-a drainage channel and 11-a drainage hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
A concrete recovery, cleaning and separation device comprises a water supply tank 1, the concrete mixing and transporting truck comprises a car washing platform 2 and a sand and stone separating screen 3, wherein the car washing platform 2 is used for parking a concrete mixing and transporting truck, a water supply tank 1 is used for containing clear water for washing concrete, a plurality of washing heads 9 for spraying water upwards are arranged on the car washing platform 2, the washing heads 9 are used for washing tires of the concrete mixing and transporting truck and concrete attached to the tires of the truck, a drainage channel 10 with an inclined bottom is arranged below the car washing platform 2, a drainage hole 11 communicated with the drainage channel 10 is arranged on the car washing platform 2, sewage after washing the truck and the tires flows into the drainage channel 10 through the drainage hole 11, the sewage reaches the lowest point of the drainage channel 10 along an inclined plane, the sand and stone separating screen 3 is arranged below a discharge port of the concrete mixing and transporting truck, the lowest point of the drainage channel 10 is connected with the sand and stone separating screen 3 through a pipeline, and the sewage after washing the truck and the tires enters the sand and stone separating screen 3. The water supply tank 1 supplies water for a feed inlet of the concrete mixing truck through a pipeline, clear water enters the inside of a mixing drum of the concrete mixing truck, the drum wall is cleaned and then discharged at a discharge outlet of the concrete mixing truck, sewage after washing the drum wall and sewage after washing a truck body and tires are converged into the sand-stone separation screen 3 together, the sand-stone separation screen 3 works to discharge stones, the sand-stone separation screen 3 is connected with the rotary screen 4, the spiral blade 5 sleeved along a rotating shaft is arranged inside the rotary screen 4, sieve pores are arranged on the spiral blade 5, a paint film with the thickness of 120mm is sprayed on the spiral blade 5, and the accumulated paint film can effectively prevent the spiral blade 5 from being worn. The rotary screen 4 works to turn over the sand in the sewage, the water and the sand are separated through screen holes, the sand is discharged from an outlet of the rotary screen 4 by means of the power of upward rotation of the spiral blade 5, the discharged stones and the sand are respectively transported away by using a transfer trolley and are transported to a stone pile and a sand pile again to become the raw material of the concrete, and the rotary screen 4 is arranged at an elevation angle with the horizontal direction, so that the sand and the sewage are fully separated. The bottom of drum sieve 4 is equipped with overflow mouth 6, and overflow mouth 6 has sedimentation tank 7 through the pipe connection, and sedimentation tank 7 is connected with clarified water recovery pond 8 and water supply tank 1 through the pipeline in proper order. And the pipelines are provided with slurry pumps. The sewage from which the stones and the sands are separated enters a sedimentation tank 7 through the conveying of a mortar pump, after sedimentation is carried out for a certain time, supernatant is conveyed to a clear water recovery tank 8 through the mortar pump to be reserved, and when the clear water in the water supply tank 1 is insufficient, the clear water can be supplemented to the water supply tank 1, so that circulation is completed.
A concrete recycling and cleaning method based on the concrete recycling and cleaning separation device comprises the following steps:
step (1): the concrete mixing and transporting vehicle is parked on a vehicle washing platform, a washing head is used for washing the vehicle body, a water supply pool is used for supplying water to wash the interior of the mixing drum, the sewage after washing the drum wall and the sewage after washing the vehicle body are converged into a sand-stone separating screen, and the sand-stone separating screen works to discharge stones;
step (2): discharging the sewage from which the stones are removed to a drum screen, and separating sand from the sewage by the drum screen;
and (3): and conveying the sewage from which the stones and the sands are separated into a sedimentation tank, conveying the supernatant into a clarified water recovery tank for storage after sedimentation, discharging water in the clarified water recovery tank to a water supply tank, and continuously providing a water source for cleaning the concrete mixing and transporting truck by the water supply tank to form circulation.
The working and using processes are as follows:
the concrete mixing and transporting vehicle is driven to a vehicle washing platform 2, clear water is sprayed out of a washing head 9 on the vehicle washing platform 2 to wash concrete attached to a vehicle body and tires, sewage enters a drainage channel 10 through a drainage hole 11 and reaches the lowest point of the drainage channel 10 along the inclined plane of the drainage channel 10; the water supply tank 1 transports clear water to the inside of a mixing drum of the concrete mixing transport vehicle through a pipeline, the drum wall is cleaned, then the clear water is discharged from a discharge port of the concrete mixing transport vehicle, the sewage after the drum wall is cleaned and the sewage after the car body and tires are cleaned are converged into the sand-stone separation screen 3, the sand-stone separation screen 3 works to discharge stones, then the sewage enters the drum screen 4, the drum screen 4 works to turn over sand in the sewage, the water and the sand are separated through screen holes, the sand is discharged from an outlet of the drum screen 4 by means of the power of upward rotation of the spiral blade 5, the discharged stones and the sand are respectively transported away by using a transport vehicle and are transported to a stone pile and a sand pile again to become the raw materials of the concrete, and the waste is reduced. The sewage from which the stones and the sands are separated enters a sedimentation tank 7 through the conveying of a mortar pump, after sedimentation is carried out for a certain time, supernatant is conveyed to a clear water recovery tank 8 through the mortar pump to be reserved, and when the clear water in the water supply tank 1 is insufficient, the clear water can be supplemented to the water supply tank 1, so that circulation is completed.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a concrete is retrieved and is washd separator, a serial communication port, including water supply tank, service rack and grit separation sieve, the service rack is used for parking the concrete mixing transport vechicle, the grit separation sieve is established in the below of concrete mixing transport vechicle discharge gate, the water supply tank supplies water for the feed inlet of concrete mixing transport vechicle through the pipeline, the grit separation sieve is connected with the drum sieve, the inside helical blade who establishes along the pivot cover that is equipped with of drum sieve, be equipped with the sieve mesh on the helical blade, the bottom of drum sieve is equipped with the overflow mouth, the overflow mouth has the sedimentation tank through the pipe connection, the sedimentation tank passes through the pipeline and is connected with clarified water recovery pond and water supply tank in proper order.
2. The concrete recycling, cleaning and separating device according to claim 1, wherein a plurality of washing heads for spraying water upwards are arranged on the car washing platform.
3. The concrete recycling, cleaning and separating device according to claim 2, wherein a drainage channel with an inclined bottom is arranged below the car washing platform, and a drainage hole communicated with the drainage channel is arranged on the car washing platform.
4. The concrete recovery, cleaning and separating device of claim 3, wherein the lowest point of the sewer is connected with the sand screen through a pipeline.
5. The concrete recycling, cleaning and separating apparatus of claim 1, wherein the spiral blades are painted with paint films.
6. The concrete recycling, cleaning and separating device of claim 5, wherein the paint film thickness is 120 mm.
7. The concrete recovery cleaning separator of claim 1, wherein the trommel is positioned at an angle of elevation to the horizontal.
8. The concrete recycling, cleaning and separating device according to claim 4, wherein a slurry pump is arranged on each pipeline.
9. The concrete recycling, cleaning and separating device of claim 1, wherein the concrete recycling, cleaning and separating device is automatically controlled by a PLC system.
10. A concrete recycling and washing method based on the concrete recycling and washing separation apparatus according to any one of claims 1 to 9, comprising the steps of:
step (1): the concrete mixing and transporting vehicle is parked on a vehicle washing platform, a washing head is used for washing the vehicle body, a water supply pool is used for supplying water to wash the interior of the mixing drum, the sewage after washing the drum wall and the sewage after washing the vehicle body are converged into a sand-stone separating screen, and the sand-stone separating screen works to discharge stones;
step (2): discharging the sewage from which the stones are removed to a drum screen, and separating sand from the sewage by the drum screen;
and (3): and conveying the sewage from which the stones and the sands are separated into a sedimentation tank, conveying the supernatant into a clarified water recovery tank for storage after sedimentation, discharging water in the clarified water recovery tank to a water supply tank, and continuously providing a water source for cleaning the concrete mixing and transporting truck by the water supply tank to form circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482891.5A CN114102863A (en) | 2021-12-07 | 2021-12-07 | Concrete recycling, cleaning and separating device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111482891.5A CN114102863A (en) | 2021-12-07 | 2021-12-07 | Concrete recycling, cleaning and separating device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114102863A true CN114102863A (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111482891.5A Pending CN114102863A (en) | 2021-12-07 | 2021-12-07 | Concrete recycling, cleaning and separating device and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN114102863A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310949A (en) * | 2007-05-22 | 2008-11-26 | 厦门厦工集团有限公司 | Efficient concrete waste recovering process and device thereof |
| CN206383298U (en) * | 2017-01-13 | 2017-08-08 | 南宁市嘉大混凝土有限公司 | A kind of concrete grout water reclamation system |
| CN107150023A (en) * | 2017-06-09 | 2017-09-12 | 重庆聚融建设（集团）股份有限公司 | Cesspool agitation cycle recovery system |
| CN208263186U (en) * | 2018-04-24 | 2018-12-21 | 武汉源锦商品混凝土有限公司 | A kind of concrete mixing plant sandstone effluent cycle recovery system |
| KR101969720B1 (en) * | 2018-10-12 | 2019-08-13 | 박용탁 | Drum for Send Wash |
| CN110626727A (en) * | 2019-09-06 | 2019-12-31 | 福建南方路面机械有限公司 | Concrete transport vehicle cleaning and recycling equipment and method |
| CN209968634U (en) * | 2019-04-19 | 2020-01-21 | 浙江森友环保成套设备有限公司 | Sand and stone separator |
| CN212120789U (en) * | 2020-05-15 | 2020-12-11 | 南京绿邦节能环保科技有限公司 | Grit separation recovery system |
| CN212980153U (en) * | 2020-08-28 | 2021-04-16 | 湖州上建混凝土有限公司 | Concrete mixer truck washs recovery circulation system |
| CN214644710U (en) * | 2020-12-11 | 2021-11-09 | 河南省路桥建设集团有限公司 | Concrete recovery system |
-
2021
- 2021-12-07 CN CN202111482891.5A patent/CN114102863A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101310949A (en) * | 2007-05-22 | 2008-11-26 | 厦门厦工集团有限公司 | Efficient concrete waste recovering process and device thereof |
| CN206383298U (en) * | 2017-01-13 | 2017-08-08 | 南宁市嘉大混凝土有限公司 | A kind of concrete grout water reclamation system |
| CN107150023A (en) * | 2017-06-09 | 2017-09-12 | 重庆聚融建设（集团）股份有限公司 | Cesspool agitation cycle recovery system |
| CN208263186U (en) * | 2018-04-24 | 2018-12-21 | 武汉源锦商品混凝土有限公司 | A kind of concrete mixing plant sandstone effluent cycle recovery system |
| KR101969720B1 (en) * | 2018-10-12 | 2019-08-13 | 박용탁 | Drum for Send Wash |
| CN209968634U (en) * | 2019-04-19 | 2020-01-21 | 浙江森友环保成套设备有限公司 | Sand and stone separator |
| CN110626727A (en) * | 2019-09-06 | 2019-12-31 | 福建南方路面机械有限公司 | Concrete transport vehicle cleaning and recycling equipment and method |
| CN212120789U (en) * | 2020-05-15 | 2020-12-11 | 南京绿邦节能环保科技有限公司 | Grit separation recovery system |
| CN212980153U (en) * | 2020-08-28 | 2021-04-16 | 湖州上建混凝土有限公司 | Concrete mixer truck washs recovery circulation system |
| CN214644710U (en) * | 2020-12-11 | 2021-11-09 | 河南省路桥建设集团有限公司 | Concrete recovery system |
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Application publication date: 20220301 |