CN216498512U - Tail gas treatment device of bag-type dust collector - Google Patents
Tail gas treatment device of bag-type dust collector Download PDFInfo
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- CN216498512U CN216498512U CN202123227930.5U CN202123227930U CN216498512U CN 216498512 U CN216498512 U CN 216498512U CN 202123227930 U CN202123227930 U CN 202123227930U CN 216498512 U CN216498512 U CN 216498512U
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- Prior art keywords
- exhaust pipe
- plate
- blast pipe
- bag
- tail gas
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- 239000000428 dust Substances 0.000 title claims abstract description 37
- 239000011941 photocatalyst Substances 0.000 claims abstract description 29
- 238000001179 sorption measurement Methods 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 13
- 230000005389 magnetism Effects 0.000 claims description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims 2
- 239000007787 solid Substances 0.000 claims 2
- 239000000126 substance Substances 0.000 abstract description 18
- 239000013618 particulate matter Substances 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 44
- 239000002808 molecular sieve Substances 0.000 description 15
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 10
- 241000883990 Flabellum Species 0.000 description 9
- 239000012530 fluid Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a tail gas treatment device of a bag-type dust collector, which comprises an exhaust pipe, wherein a fixing ring fixedly connected with the exhaust pipe is sleeved at the left end of the exhaust pipe, two fixing holes are formed in the fixing ring, first adsorption components are arranged in the exhaust pipe and outside the exhaust pipe, a second adsorption component is arranged in the exhaust pipe, a photocatalyst component is arranged in the exhaust pipe, and a dust cover is hinged at the right end of the exhaust pipe. The utility model discloses a, be convenient for carry out secondary treatment to the gas after the dust particulate matter blocks, subsidiary harmful substance and peculiar smell in the effectual reduction gas reduce the influence that causes the environment after the gas outgoing, convenient to popularize and use.
Description
Technical Field
The utility model relates to the technical field of tail gas treatment, in particular to a tail gas treatment device of a bag-type dust collector.
Background
The bag type dust collector is a dry dust filtering device, it is suitable for catching tiny, dry, non-fibrous dust, the filter bag is made of woven filter cloth or non-woven felt, utilize the filtering action of the fabric to filter the dust-containing gas, after the dust-containing gas enters the bag type dust collector, the dust with big granule and big proportion falls into the dust hopper because of the function of gravity subsides, the gas containing tiny dust is when passing the filter material, the dust is detained, make the gas purified.
In the prior art, although the bag-type dust collector can filter dust particles in gas, the bag-type dust collector does not have the function of purifying harmful substances and peculiar smell in the gas, and the bag-type dust collector still easily affects the environment after the gas is discharged, so that the bag-type dust collector is inconvenient to use.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model aims to provide a tail gas treatment device of a bag-type dust collector.
In order to solve the above problems, the present invention adopts the following technical solutions.
The utility model provides a tail gas processing apparatus of sack cleaner, includes the blast pipe, the left end cover of blast pipe is equipped with rather than fixed ring of fixed connection, two fixed orificess have been seted up to fixed ring's inside, the inside and the outside of blast pipe are provided with first absorption subassembly, the inside of blast pipe is provided with the second and adsorbs the subassembly, the inside of blast pipe is provided with the photocatalyst subassembly, the right-hand member of blast pipe articulates there is the shield.
As a further description of the above technical solution:
first absorption subassembly includes motor, axis of rotation, flabellum board, fixed box and fixed frame, the inside fixedly connected with backup pad of blast pipe, the outside of motor installation to backup pad, the output shaft of motor passes through shaft coupling and axis of rotation fixed connection, the axis of rotation runs through and the outside of swivelling joint to backup pad, flabellum board fixed connection is to the middle part of axis of rotation, the outside of fixed frame fixed connection to blast pipe, fixed box runs through and sliding connection to the inside of fixed frame, fixed box runs through and extends to the inside of blast pipe, the inside of fixed box is provided with the treatment fluid, the outside of flabellum board extends to the inside of fixed box.
As a further description of the above technical solution:
two magnetites are installed in the outside of fixed box, two the outside of magnetites all is connected with fixed frame magnetism, a set of catching groove has been seted up in the outside of fixed frame.
As a further description of the above technical solution:
the second adsorption component comprises an activated carbon plate, a molecular sieve plate, four clamping blocks and an arc plate, wherein the clamping blocks are fixedly connected to the outer side of the arc plate and the inner part of the exhaust pipe respectively, the activated carbon plate and the molecular sieve plate are clamped to the inner parts of the four clamping blocks respectively, the arc plate is clamped to the inner part of the exhaust pipe, and the outer side of the arc plate is fixedly connected with a handle.
As a further description of the above technical solution:
the photocatalyst component comprises a group of photocatalyst plates and ultraviolet lamps, wherein the photocatalyst plates are fixedly connected to the inside of the exhaust pipe, the photocatalyst plates are arranged in a staggered mode from left to right, and the ultraviolet lamps are installed inside the photocatalyst plates.
As a further description of the above technical solution:
and a controller is arranged on the outer side of the exhaust pipe.
Compared with the prior art, the utility model has the advantages that:
(1) this scheme utilization is motor operation in the backup pad, thereby make the rotating shaft drive flabellum board rotate, because the flabellum board extends to the inside of fixed box, thereby its surface will contact with the treatment fluid in the fixed box, thereby make the flabellum board make gaseous and treatment fluid fully contact at the rotation in-process, thereby get rid of the harmful substance in the air, like sulfur dioxide, the accessible configuration can with the alkaline treatment fluid of sulfur dioxide reaction, the treatment fluid that the harmful gas of other properties also can correspond correspondingly configures, reach the effect of pertinence processing.
(2) This scheme utilization activated carbon plate and the setting of molecule sieve are convenient for handle harmful substance in the gas and impurity, promote gaseous quality, reduce gaseous inside harmful substance content, utilize the setting of four fixture blocks, are convenient for play the fixed action to activated carbon plate and molecule sieve.
(3) The irradiation of this scheme utilization ultraviolet lamp reacts with a set of photocatalyst board to can degrade the harmful substance in the gas, according to a set of photocatalyst board staggered arrangement, thereby be convenient for prolong gas exhaust time, make gaseous purifying effect better.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional front view of the structure of the present invention;
FIG. 3 is a side exploded view of the blade plate and retaining box structure of the present invention;
FIG. 4 is a side exploded view of a second adsorbent assembly according to the present invention.
The reference numbers in the figures illustrate:
1. an exhaust pipe; 2. a fixing ring; 3. a first adsorption module; 301. a motor; 302. a rotating shaft; 303. a leaf plate; 304. a fixing box; 305. a fixing frame; 4. a second adsorption component; 401. an activated carbon plate; 402. a molecular sieve plate; 403. a clamping block; 404. an arc-shaped plate; 5. a photocatalyst component; 501. a photocatalyst plate; 502. an ultraviolet lamp; 6. a support plate; 7. a magnet; 8. buckling grooves; 9. a dust cover; 10. and a controller.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention;
referring to fig. 1 to 4, the tail gas treatment device of the bag-type dust collector comprises an exhaust pipe 1, wherein a fixing ring 2 fixedly connected with the exhaust pipe 1 is sleeved at the left end of the exhaust pipe 1, two fixing holes are formed in the fixing ring 2, first adsorption components 3 are arranged in the exhaust pipe 1 and outside the exhaust pipe, a second adsorption component 4 is arranged in the exhaust pipe 1, a photocatalyst component 5 is arranged in the exhaust pipe 1, and a dust cover 9 is hinged to the right end of the exhaust pipe 1.
According to the utility model, a user can install the exhaust pipe 1 to the exhaust outlet of the bag-type dust collector through the two fixing holes on the fixing ring 2, then after gas enters the exhaust pipe 1, the first adsorption component 3 is used for carrying out first adsorption treatment on harmful substances and peculiar smell in the gas, then the second adsorption component 4 is used for carrying out second adsorption on the peculiar smell and impurities in the gas, then the photocatalyst component 5 is used for operating, the gas is effectively degraded, the sterilization and purification effects are achieved, the dust cover 9 is used, when the whole device is not used, the exhaust pipe 1 is closed, and the phenomenon that external dust and foreign matters enter the exhaust pipe 1 is reduced.
Please refer to fig. 1-3, wherein: first absorption subassembly 3 includes motor 301, axis of rotation 302, flabellum board 303, fixed box 304 and fixed frame 305, the inside fixedly connected with backup pad 6 of blast pipe 1, motor 301 installs the outside to backup pad 6, the output shaft of motor 301 passes through shaft coupling and axis of rotation 302 fixed connection, axis of rotation 302 runs through and swivelling joint to the outside of backup pad 6, flabellum board 303 fixed connection is to the middle part of axis of rotation 302, fixed box 305 fixed connection is to the outside of blast pipe 1, fixed box 304 runs through and sliding connection to the inside of fixed box 305, fixed box 304 runs through and extends to the inside of blast pipe 1, the inside of fixed box 304 is provided with the treatment fluid, the outside of flabellum board 303 extends to the inside of fixed box 304.
In the utility model, the motor 301 on the support plate 6 is operated, so that the rotating shaft 302 drives the fan blade plate 303 to rotate, the fan blade plate 303 extends into the fixed box 304, the outer surface of the fan blade plate 303 is contacted with the treatment liquid in the fixed box 304, so that gas is fully contacted with the treatment liquid in the rotating process of the fan blade plate 303, harmful substances in the air, such as sulfur dioxide, can be removed by configuring alkaline treatment liquid capable of reacting with the sulfur dioxide, and harmful gases with other properties can also be correspondingly configured with corresponding treatment liquid, so that the targeted treatment effect is achieved, and the arrangement of the fixed frame 305 is convenient for guiding and fixing the fixed box 304 during installation.
Please refer to fig. 1-3, wherein: two magnets 7 are installed on the outer side of the fixing box 304, the outer sides of the two magnets 7 are magnetically connected with the fixing frame 305, and a group of buckling grooves 8 are formed in the outer side of the fixing frame 305.
In the present invention, when the processing liquid needs to be replenished, the user can place fingers on the catching grooves 8, then pull out the fixing box 304 from the inside of the fixing frame 305, then pour the new processing liquid into the inside of the fixing box 304, then insert the fixing box 304 into the inside of the fixing frame 305, and utilize the magnetic influence of the two magnets 7 to fix the fixing frame 305 and the outside of the fixing box 304, thereby ensuring the fixing effect.
Please refer to fig. 1-4, wherein: the second adsorption component 4 comprises an activated carbon plate 401, a molecular sieve plate 402, four clamping blocks 403 and an arc-shaped plate 404, wherein the four clamping blocks 403 are respectively and fixedly connected to the outer side of the arc-shaped plate 404 and the inside of the exhaust pipe 1, the activated carbon plate 401 and the molecular sieve plate 402 are respectively clamped to the inside of the four clamping blocks 403, the arc-shaped plate 404 is clamped to the inside of the exhaust pipe 1, and the outer side of the arc-shaped plate 404 is fixedly connected with a handle.
According to the utility model, the arrangement of the activated carbon plate 401 and the molecular sieve plate 402 is utilized to facilitate the treatment of harmful substances and impurities in gas, improve the gas quality and reduce the content of harmful substances in the gas, the arrangement of the four fixture blocks 403 is utilized to facilitate the fixation of the activated carbon plate 401 and the molecular sieve plate 402, when the activated carbon plate 401 and the molecular sieve plate 402 need to be replaced, a user can directly pull out the arc-shaped plate 404 on the exhaust pipe 1, then the two fixture blocks 403 at the top cancel the limitation of the activated carbon plate 401 and the molecular sieve plate 402, and then the user can replace the activated carbon plate 401 and the molecular sieve plate 402 quickly.
Please refer to fig. 1-2, wherein: the photocatalyst assembly 5 includes a set of photocatalyst plates 501 and ultraviolet lamps 502, the set of photocatalyst plates 501 are all fixedly connected to the inside of the exhaust pipe 1, the set of photocatalyst plates 501 are staggered from left to right, and the ultraviolet lamps 502 are installed inside the set of photocatalyst plates 501.
In the utility model, the irradiation of the ultraviolet lamp 502 is utilized to react with the group of photocatalyst plates 501, so that harmful substances in the gas can be degraded, and the harmful substances are staggered according to the group of photocatalyst plates 501, so that the gas discharge time is conveniently prolonged, and the gas purification effect is better.
Please refer to fig. 1, in which: a controller 10 is mounted on the outside of the exhaust pipe 1.
In the utility model, the controller 10 is arranged, so that a user can conveniently control the internal electrical components of the whole device, and the device is more convenient and faster.
It should be noted that each device in the present application is a common device in the market, and can be selected according to the requirement when in specific use, and the circuit connection relationship of each device all belongs to a simple series and parallel connection circuit, and there is no innovation point in the circuit connection, and those skilled in the art can easily implement the circuit connection, and belong to the prior art, and are not described again.
The working principle is as follows: the controller 10 is arranged, so that a user can conveniently control the internal electrical elements of the whole device, the device is more convenient and faster, the user can install the exhaust pipe 1 to the exhaust port of the bag-type dust collector through two fixing holes on the fixing ring 2, then after the gas enters the exhaust pipe 1, the first adsorption component 3 is used for carrying out first adsorption treatment on harmful substances and peculiar smell in the gas, the motor 301 on the supporting plate 6 is used for operating, so that the rotating shaft 302 drives the fan blade plate 303 to rotate, as the fan blade plate 303 extends to the inside of the fixing box 304, the outer surface of the fan blade plate is contacted with the treatment liquid in the fixing box 304, so that the gas is fully contacted with the treatment liquid in the rotating process of the fan blade plate 303, the harmful substances in the air, such as sulfur dioxide, can be removed by configuring alkaline treatment liquid capable of reacting with sulfur dioxide, harmful gases with other properties can also be correspondingly configured with the corresponding treatment liquid, the targeted treatment effect is achieved, the setting of the fixing frame 305 is utilized, the fixing box 304 can be conveniently installed to play a role in guiding and fixing, when treatment liquid needs to be supplemented, a user can place fingers on the fastening grooves 8, then the fixing box 304 is pulled out of the fixing frame 305, new treatment liquid is poured into the fixing box 304, then the fixing box 304 is inserted into the fixing frame 305, the fixing frame 305 and the outer side of the fixing box 304 are fixed by utilizing the magnetic influence of the two magnets 7, the fixing effect is ensured, then the second adsorption component 4 is utilized to carry out second adsorption on peculiar smell and impurities in the gas, the setting of the activated carbon plate 401 and the molecular sieve plate 402 is utilized to facilitate the treatment on harmful substances and impurities in the gas, the gas quality is improved, the content of harmful substances in the gas is reduced, the setting of the four clamping blocks 403 is utilized, the fixing function of the activated carbon plate 401 and the molecular sieve plate 402 is convenient, when the activated carbon plate 401 and the molecular sieve plate 402 need to be replaced, a user can directly pull out the arc-shaped plate 404 on the exhaust pipe 1, then the two fixture blocks 403 at the top part cancel the limit of the activated carbon plate 401 and the molecular sieve plate 402, then the user can replace the activated carbon plate 401 and the molecular sieve plate 402 quickly, then the photocatalyst component 5 is used for effectively degrading gas to achieve the effect of sterilization and purification, the irradiation of the ultraviolet lamp 502 is used for reacting with a group of photocatalyst plates 501, so that harmful substances in the gas can be degraded, the photocatalyst plates 501 are arranged in a staggered mode according to one group, so that the gas exhaust time is prolonged, the gas purification effect is better, the dust cover 9 is used, when the whole device is not used, the exhaust pipe 1 is closed, and the phenomenon that external dust and sundries enter the exhaust pipe 1 is reduced, whole device is convenient for carry out secondary treatment to the gas after the dust particulate matter blocks, and the influence that the gas discharge caused the environment is reduced to subsidiary harmful substance and peculiar smell in the effectual reduction gas, convenient to popularize and use.
The foregoing is only a preferred embodiment of the present invention; the scope of the utility model is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (6)
1. The utility model provides a tail gas processing apparatus of sack cleaner, includes blast pipe (1), its characterized in that: the left end cover of blast pipe (1) is equipped with rather than fixed connection's solid fixed ring (2), two fixed orificess have been seted up to the inside of solid fixed ring (2), the inside and the outside of blast pipe (1) are provided with first adsorption component (3), the inside of blast pipe (1) is provided with second adsorption component (4), the inside of blast pipe (1) is provided with photocatalyst component (5), the right-hand member of blast pipe (1) articulates there is shield (9).
2. The tail gas treatment device of the bag-type dust collector according to claim 1, characterized in that: the first adsorption component (3) comprises a motor (301), a rotating shaft (302), a fan blade plate (303), a fixing box (304) and a fixing frame (305), a supporting plate (6) is fixedly connected to the inside of the exhaust pipe (1), the motor (301) is installed on the outer side of the supporting plate (6), an output shaft of the motor (301) is fixedly connected with the rotating shaft (302) through a coupler, the rotating shaft (302) penetrates through and is rotatably connected to the outer side of the supporting plate (6), the fan blade plate (303) is fixedly connected to the middle of the rotating shaft (302), the fixing frame (305) is fixedly connected to the outer side of the exhaust pipe (1), the fixing box (304) penetrates through and is slidably connected to the inside of the fixing frame (305), the fixing box (304) penetrates through and extends to the inside of the exhaust pipe (1), and a processing liquid is arranged inside the fixing box (304), the outer side of the fan blade plate (303) extends to the inside of the fixing box (304).
3. The tail gas treatment device of the bag-type dust collector according to claim 2, characterized in that: two magnetite (7) are installed in the outside of fixed box (304), two the outside of magnetite (7) all is connected with fixed frame (305) magnetism, a set of catching groove (8) have been seted up in the outside of fixed frame (305).
4. The tail gas treatment device of the bag-type dust collector according to claim 1, characterized in that: second adsorption component (4) include activated carbon plate (401), molecule sieve (402), four fixture blocks (403) and arc (404), four fixture block (403) fixed connection respectively to the outside of arc (404) and the inside of blast pipe (1), activated carbon plate (401) and molecule sieve (402) block joint respectively to the inside of four fixture blocks (403), arc (404) joint to the inside of blast pipe (1), the outside fixedly connected with handle of arc (404).
5. The tail gas treatment device of the bag-type dust collector according to claim 1, characterized in that: photocatalyst subassembly (5) are including a set of photocatalyst plate (501) and ultraviolet lamp (502), and are a set of all fixed connection in the inside of blast pipe (1) photocatalyst plate (501), and is a set of photocatalyst plate (501) is from left to right staggered arrangement, ultraviolet lamp (502) are installed to the inside of a set of photocatalyst plate (501).
6. The tail gas treatment device of the bag-type dust collector according to claim 1, characterized in that: and a controller (10) is installed on the outer side of the exhaust pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123227930.5U CN216498512U (en) | 2021-12-21 | 2021-12-21 | Tail gas treatment device of bag-type dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123227930.5U CN216498512U (en) | 2021-12-21 | 2021-12-21 | Tail gas treatment device of bag-type dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216498512U true CN216498512U (en) | 2022-05-13 |
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ID=81501433
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123227930.5U Active CN216498512U (en) | 2021-12-21 | 2021-12-21 | Tail gas treatment device of bag-type dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216498512U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487631A (en) * | 2022-09-20 | 2022-12-20 | 江苏升辉装备集团股份有限公司 | Bag type dust collector with automatic ash discharge function |
-
2021
- 2021-12-21 CN CN202123227930.5U patent/CN216498512U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115487631A (en) * | 2022-09-20 | 2022-12-20 | 江苏升辉装备集团股份有限公司 | Bag type dust collector with automatic ash discharge function |
| CN115487631B (en) * | 2022-09-20 | 2023-11-28 | 江苏升辉装备集团股份有限公司 | Bag type dust collector with automatic ash discharging function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240227 Address after: Room 504, No. 24, Shijiamingmen Garden, Binhu District, Wuxi City, Jiangsu Province, 214000 Patentee after: Yong Jianhua Country or region after: China Patentee after: Xia Liangke Address before: 215000 Nanzhuang Village, yangshe Town, Tang City, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: Zhangjiagang Hongde Machinery Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240401 Address after: 1890-1201, the Taihu Lake West Avenue, Binhu District, Wuxi City, Jiangsu Province, 214000 Patentee after: WUXI KERUN ENVIRONMENT TECHNOLOGY CO.,LTD. Country or region after: China Address before: Room 504, No. 24, Shijiamingmen Garden, Binhu District, Wuxi City, Jiangsu Province, 214000 Patentee before: Yong Jianhua Country or region before: China Patentee before: Xia Liangke |