CN113842747A - Variable-frequency VOCs zeolite rotary drum adsorption equipment - Google Patents
Variable-frequency VOCs zeolite rotary drum adsorption equipment Download PDFInfo
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- CN113842747A CN113842747A CN202111203576.4A CN202111203576A CN113842747A CN 113842747 A CN113842747 A CN 113842747A CN 202111203576 A CN202111203576 A CN 202111203576A CN 113842747 A CN113842747 A CN 113842747A
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 61
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 46
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000010457 zeolite Substances 0.000 title claims abstract description 46
- 239000012855 volatile organic compound Substances 0.000 title claims abstract 18
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 61
- 238000012545 processing Methods 0.000 claims description 8
- 239000000112 cooling gas Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 3
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002808 molecular sieve Substances 0.000 description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/06—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 adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses variable-frequency VOCs zeolite drum adsorption equipment which comprises an outer box body, an adsorption treatment device, a driving gear and a rotating motor, wherein a concentrated gas flow passage, a hot air flow passage, a supporting frame, a shaft sleeve, a first partition plate and a second partition plate are arranged in the outer box body, and the adsorption treatment device comprises a rotating shaft, a treatment shell, a bottom fluted disc, a zeolite adsorption block and a sealing block cover. The invention belongs to the technical field of VOCs treatment equipment, and particularly provides a variable-frequency VOCs zeolite drum adsorption equipment which is good in adsorption effect, low in maintenance difficulty, short in maintenance time, long in service life, low in construction and operation cost, simple in structure and stable in operation, can be partially replaced according to part of use conditions, and has the advantages that regenerated gas and purified gas share the same channel, the difficulty of pipeline arrangement is low, and construction and operation costs are low.
Description
Technical Field
The invention belongs to the technical field of VOCs treatment equipment, and particularly relates to variable-frequency VOCs zeolite drum adsorption equipment.
Background
The adsorption of iodine by the zeolite adsorbent comprises physical adsorption and chemical adsorption, wherein the physical adsorption is mainly generated by Van der Waals force between iodine in a solution and the solid surface of the zeolite molecular sieve, and the chemical adsorption is realized by the fact that the adsorption performance of zeolite is greatly changed through cation exchange in pores and cavities, namely the zeolite is subjected to ion exchange with a soluble salt solution containing Ag to form silver ion type zeolite.
The zeolite wheel has high concentration ratio. The concentration multiple can reach 5-15 times, the specification of post-treatment equipment can be greatly reduced, and the construction and operation cost of subsequent treatment equipment is reduced. The operation cost is low. The pressure generated by the adsorption of VOCs by the zeolite rotating wheel is reduced, so that the power consumption can be greatly reduced. The operation is simple, and the maintenance is convenient. The zeolite runner overall system adopts the pre-assembly and modular design, is convenient to install, and provides a continuous and unmanned control mode. The adsorption and desorption effect is good, the waste gas treatment efficiency is high (more than 95 percent), and the waste gas after being concentrated by the rotating wheel can reach the national emission standard. The operation is safe and stable. The zeolite runner is made of inorganic oxide, is non-combustible and has high safety. The application range is wide, and the core material is the molecular sieve, so the core material has high inertia, and the hydrophobic molecular sieve can be used for efficiently treating VOCs (volatile organic chemicals) with thermopolymerizability, such as styrene, cyclohexanone and the like which are difficult to treat by active carbon.
The existing variable-frequency VOCS zeolite drum adsorption equipment has too many inlets and outlets, causes difficulty for pipeline arrangement, increases cost, and has a complex structure and unstable operation.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the variable-frequency VOCs zeolite drum adsorption equipment which has the advantages of good adsorption effect, low maintenance difficulty, short maintenance time, long service life of the equipment, low difficulty of pipeline arrangement, low construction and operation cost, simple structure and stable operation, and can be partially replaced according to part of use conditions, and the regenerated gas and the purified gas share the same channel.
The technical scheme adopted by the invention is as follows: the invention discloses variable-frequency VOCs zeolite drum adsorption equipment which comprises an outer box body, an adsorption treatment device, a driving gear and a rotating motor, wherein the adsorption treatment device is rotatably arranged in the outer box body, the rotating motor is arranged in the outer box body, the driving gear is arranged on the rotating motor, the driving gear is connected with an output shaft of the rotating motor, and the driving gear is meshed with the adsorption treatment device.
Further, outer box top center department is equipped with the purge gas export, purge gas export side is equipped with the heated gas entry, outer box side center department is equipped with the gaseous export of concentrated VOCs, the gaseous export place side one corner in concentrated VOCs of outer box is equipped with the cooling gas entry, the gaseous export place side contralateral center department of concentrated VOCs of outer box is equipped with and contains the gaseous entry of VOCs.
Further, the internal concentrated gas runner, hot-blast runner, support frame, axle sleeve, first division board and second division board of being equipped with of outer container, concentrated gas runner one end is linked together with concentrated VOCs gas outlet, hot-blast runner one end is linked together with the heating gas entry, the concentrated gas runner other end is relative with the hot-blast runner other end, the top in the outer container is located to the support frame, support frame center department is located to the axle sleeve, the adjacent side middle part in the side of the gaseous export place of the concentrated VOCs of outer container inboard is located to first division board, the side inboard in the concentrated VOCs gas outlet place of outer container is located to the second division board.
Further, adsorb processing apparatus includes the axis of rotation, handles shell, end fluted disc, zeolite adsorption piece and sealing cover, the axis of rotation rotates and locates the axle sleeve inboardly, be equipped with end fluted disc on the axis of rotation axle sleeve, it locates on the end fluted disc to handle the shell, it is the annular setting to handle the shell, it sets up with the axis of rotation is concentric to handle the shell, it adsorbs the piece to be equipped with zeolite in the processing shell, it is equipped with the sealing cover to handle the shell outside, end fluted disc is connected with drive gear meshing.
Furthermore, an adsorption flow channel is arranged in the zeolite adsorption block.
Furthermore, one side, far away from the outer box, of the first partition plate is provided with a first air sealing strip, and one side, far away from the outer box, of the second partition plate is provided with a second air sealing strip.
The invention with the structure has the following beneficial effects: this scheme a frequency conversion formula VOCS zeolite rotary drum adsorption equipment, because the setting of adsorption treatment device makes adsorption effect good, and can carry out local change according to part in service behavior, reduced the maintenance degree of difficulty, reduced maintenance duration, improved equipment life, because the setting of purifying gas outlet for regeneration gas and the gaseous same passageway that shares of purification back have reduced the degree of difficulty that the pipeline was arranged, the cost is reduced, simple structure, the operation is stable.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a variable-frequency VOCs zeolite drum adsorption device of the present invention;
FIG. 2 is a schematic diagram of the internal structure of a variable frequency VOCs zeolite drum adsorption apparatus of the present invention;
FIG. 3 is a schematic structural diagram of an outer box of the variable frequency VOCs zeolite drum adsorption equipment of the present invention;
FIG. 4 is a schematic structural diagram of an adsorption treatment device of a variable-frequency VOCs zeolite drum adsorption apparatus according to the present invention;
fig. 5 is a schematic structural diagram of a zeolite adsorption block of the variable-frequency VOCs zeolite drum adsorption equipment.
The device comprises an outer box body 1, an adsorption treatment device 2, a driving gear 3, a rotating motor 4, a purified gas outlet 5, a purified gas outlet 6, a heated gas inlet 7, a concentrated VOCs gas outlet 8, a cooling gas inlet 9, a VOCs-containing gas inlet 10, a concentrated gas flow passage 11, a hot air flow passage 12, a support frame 13, a shaft sleeve 14, a first partition plate 15, a second partition plate 16, a rotating shaft 17, a treatment shell 18, a bottom fluted disc 19, a zeolite adsorption block 20, a sealing block cover 21, an adsorption flow passage 22, a first gas sealing strip 23 and a second gas sealing strip.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; 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.
As shown in fig. 1-5, the variable frequency VOCs zeolite drum adsorption equipment of the present invention comprises an outer box 1, an adsorption treatment device 2, a driving gear 3 and a rotating motor 4, wherein the adsorption treatment device 2 is rotatably disposed in the outer box 1, the rotating motor 4 is disposed in the outer box 1, the driving gear 3 is disposed on the rotating motor 4, the driving gear 3 is connected to an output shaft of the rotating motor 4, and the driving gear 3 is engaged with the adsorption treatment device 2.
Wherein, outer box 1 top center department is equipped with purified gas outlet 5, purified gas outlet 5 side is equipped with heated gas entry 6, outer box 1 side center department is equipped with concentrated VOCs gas outlet 7, the gaseous 7 place side one corner in concentrated VOCs gas outlet of outer box 1 is equipped with cooling gas entry 8, the contralateral center department of the gaseous 7 place side in concentrated VOCs of outer box 1 is equipped with and contains VOCs gas entry 9. The utility model discloses a concentrated VOCs gas outlet of outer container 1, including outer container 1, be equipped with concentrated gas runner 10, hot air runner 11, support frame 12, axle sleeve 13, first division board 14 and second division board 15 in the outer container 1, concentrated gas runner 10 one end is linked together with concentrated VOCs gas outlet 7, hot air runner 11 one end is linked together with heated gas entry 6, the concentrated gas runner 10 other end is relative with the hot air runner 11 other end, top in outer container 1 is located to support frame 12, support frame 12 center department is located to axle sleeve 13, the adjacent side middle part in the side of concentrated VOCs gas outlet 7 place of outer container 1 inboard is located to first division board 14, the side inboard in concentrated VOCs gas outlet 7 place of outer container 1 is located to second division board 15. Adsorb processing apparatus 2 and include axis of rotation 16, handle shell 17, end fluted disc 18, zeolite adsorption piece 19 and a cover 20, axis of rotation 16 rotates and locates axle sleeve 13 inboardly, be equipped with end fluted disc 18 on the 16 axle sleeves 13 of axis of rotation, handle on shell 17 locates end fluted disc 18, it is the annular setting to handle shell 17, it sets up with axis of rotation 16 concentricity to handle shell 17, it adsorbs piece 19 to be equipped with zeolite in the shell 17 to handle, it is equipped with a cover 20 to handle the shell 17 outside, end fluted disc 18 is connected with the meshing of drive gear 3. An adsorption flow channel 21 is arranged in the zeolite adsorption block 19. The first separating plate 14 is provided with a first air sealing strip 22 at one side far away from the outer box 1, and the second separating plate 15 is provided with a second air sealing strip 23 at one side far away from the outer box 1.
When the device is used specifically, the rotating motor 4 drives the driving gear 3 to rotate, the driving gear 3 drives the adsorption treatment device 2 to rotate, the waste gas containing VOCs enters the outer box body 1 through the VOCs-containing gas inlet 9, and the waste gas enters the inner side of the treatment shell 17 through the zeolite adsorption block 19 and flows out of the essence gas outlet; meanwhile, high-temperature gas enters from the heating gas inlet 6 and is blown to the zeolite adsorption block 19 through the hot air runner 11, and the zeolite adsorption block 19 is heated to desorb VOCs and flow out of the concentrated VOCs gas outlet 7 through the concentrated gas runner 10 along with hot air; at the same time, the cooling gas enters the outer casing 1 through the cooling gas inlet 8, is blown to the zeolite adsorption block 19 which is just heated by the high-temperature gas, is cooled, and flows out through the purified gas outlet 5.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a frequency conversion formula VOCs zeolite rotary drum adsorption equipment which characterized in that: including outer box, absorption processing apparatus, drive gear and rotation motor, absorption processing apparatus rotates and locates in the outer box, it locates in the outer box to rotate the motor, drive gear locates on the rotation motor, drive gear links to each other with the rotation motor output shaft, drive gear is connected with the meshing of absorption processing apparatus.
2. The variable frequency VOCs zeolite drum adsorption apparatus of claim 1, wherein: the utility model discloses a VOCs gas outlet device, including outer box, purification gas outlet, outer box, cooling gas inlet, outer box, purification gas outlet, the gas outlet of outer box top center department is equipped with purified gas outlet, purified gas outlet side is equipped with the heated gas entry, outer box side center department is equipped with concentrated VOCs gas outlet, the concentrated VOCs gas outlet place side one corner of outer box is equipped with the cooling gas entry, the offside center department of the concentrated VOCs gas outlet place side of outer box is equipped with and contains VOCs gas inlet.
3. The variable frequency VOCs zeolite drum adsorption apparatus of claim 1, wherein: the external box is internally provided with a concentrated gas flow passage, a hot air flow passage, a support frame, a shaft sleeve, a first partition plate and a second partition plate, wherein one end of the concentrated gas flow passage is communicated with a concentrated VOCs gas outlet, one end of the hot air flow passage is communicated with a heating gas inlet, the other end of the concentrated gas flow passage is opposite to the other end of the hot air flow passage, the top of the external box is arranged on the support frame, the center of the support frame is arranged on the shaft sleeve, the middle part of the adjacent side of the concentrated VOCs gas outlet of the internal side of the external box is arranged on the first partition plate, and the side of the concentrated VOCs gas outlet of the external box is arranged on the internal side of the second partition plate.
4. The variable frequency VOCs zeolite drum adsorption apparatus of claim 1, wherein: adsorb processing apparatus includes the axis of rotation, handles shell, end fluted disc, zeolite adsorption piece and sealing cover, the axis of rotation rotates and locates the axle sleeve inboard, be equipped with end fluted disc on the axis of rotation axle sleeve, it locates on the end fluted disc to handle the shell, it is the annular setting to handle the shell, it sets up with the axis of rotation is concentric to handle the shell, it adsorbs the piece to be equipped with zeolite in the processing shell, it is equipped with the sealing cover to handle the shell outside, end fluted disc is connected with drive gear meshing.
5. The variable frequency VOCs zeolite drum adsorption apparatus of claim 4, wherein: an adsorption flow channel is arranged in the zeolite adsorption block.
6. The variable frequency VOCs zeolite drum adsorption apparatus of claim 3, wherein: one side of the first partition board, which is far away from the outer box body, is provided with a first air sealing strip, and one side of the second partition board, which is far away from the outer box body, is provided with a second air sealing strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203576.4A CN113842747A (en) | 2021-10-15 | 2021-10-15 | Variable-frequency VOCs zeolite rotary drum adsorption equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111203576.4A CN113842747A (en) | 2021-10-15 | 2021-10-15 | Variable-frequency VOCs zeolite rotary drum adsorption equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113842747A true CN113842747A (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111203576.4A Pending CN113842747A (en) | 2021-10-15 | 2021-10-15 | Variable-frequency VOCs zeolite rotary drum adsorption equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108295620A (en) * | 2018-01-26 | 2018-07-20 | 华北理工大学 | A kind of zeolite rotating cylinder and its adsorption cleaning system |
| CN211189668U (en) * | 2019-11-19 | 2020-08-07 | 天津市环境保护科学研究院 | Rotary drum adsorber, exhaust gas treatment device and system |
| CN212327851U (en) * | 2020-03-09 | 2021-01-12 | 可迪尔空气技术（北京）有限公司 | Cylinder runner zeolite air-cooled heat sink |
-
2021
- 2021-10-15 CN CN202111203576.4A patent/CN113842747A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108295620A (en) * | 2018-01-26 | 2018-07-20 | 华北理工大学 | A kind of zeolite rotating cylinder and its adsorption cleaning system |
| CN211189668U (en) * | 2019-11-19 | 2020-08-07 | 天津市环境保护科学研究院 | Rotary drum adsorber, exhaust gas treatment device and system |
| CN212327851U (en) * | 2020-03-09 | 2021-01-12 | 可迪尔空气技术（北京）有限公司 | Cylinder runner zeolite air-cooled heat sink |
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