CN206027403U - Waste gas treatment device - Google Patents
Waste gas treatment device Download PDFInfo
- Publication number
- CN206027403U CN206027403U CN201621068535.3U CN201621068535U CN206027403U CN 206027403 U CN206027403 U CN 206027403U CN 201621068535 U CN201621068535 U CN 201621068535U CN 206027403 U CN206027403 U CN 206027403U
- Authority
- CN
- China
- Prior art keywords
- absorption tower
- tower body
- gas
- fluid reservoir
- shower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002912 waste gas Substances 0.000 title abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 16
- 238000012856 packing Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 34
- 239000012530 fluid Substances 0.000 claims description 21
- 239000003814 drug Substances 0.000 claims description 20
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 27
- 239000000463 material Substances 0.000 abstract description 9
- 230000002378 acidificating effect Effects 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 239000011550 stock solution Substances 0.000 abstract 2
- 239000003595 mist Substances 0.000 abstract 1
- 239000010815 organic waste Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 150000003254 radicals Chemical class 0.000 description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 2
- 238000011953 bioanalysis Methods 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- -1 hydroxyl radical free radical Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a waste gas treatment device, including the absorption tower body, the top of absorption tower body is the gas vent, this is internal by the last mist eliminating board that has set gradually under to on the absorption tower, rearmounted filter layer, low temperature plasma module, the shower, packing layer and stock solution room, the bottom of shower is provided with a liquid distributor, the bottom of absorption tower body is provided with an intake pipe, the stock solution room is passed from lower to upper in proper order to the intake pipe and filler supporting plate gets into the filler, the top gas outlet of intake pipe is provided with an air distributor, the outside of absorption tower body is provided with an overflow chamber, an overflow mouth has been seted up at the top of overflow chamber, be provided with a water pump in the overflow chamber, the water pump is linked together through pipeline and shower. The utility model discloses a spraying liquid washing and adsorbing, furthest increases the gas -liquid and contacts, promotes gas liquid phase mass transfer speed, reaches the mesh that acidic material in the waste gas was got rid of to the high efficiency to get rid of some organic waste gas molecules and peculiar smell through low temperature plasma module.
Description
Technical field
The utility model is related to a kind of emission-control equipment.
Background technology
Acid waste gas are a kind of common industrial waste gases, and acid waste gas are directly discharged in air, can serious environment pollution,
Meanwhile, some poisonous and hazardous organic exhaust gas are often accompanied with this acid waste gas, therefore, needed to spent acidic before discharging
Acidic materials and organic matter in gas are purified.
Air pollution control technology traditional at present has absorption method, condensation method, bioanalysis and combustion method etc..Absorption method is main
With charcoal absorption, regeneration, the organic exhaust gas after regeneration after ideal purification effect, but charcoal absorption saturation, is needed to still need to place
Reason.Condensation method range of application is limited.Bioanalysis is invested and operating cost is relatively low, but operation complex operation, floor space are larger, deposit
In the possibility of secondary pollution.Production by Catalytic Combustion Process purification efficiency is high, but has the disadvantage that equipment volume is larger, one-time investment and equipment
Operation energy consumption is larger, and there is potential safety hazard.
Utility model content
For the problems referred to above, the utility model provides a kind of emission-control equipment, can not only be in acid waste gas
Acidic materials are removed, while the organic matter that also can be degraded in acid waste gas, reaches the purpose of purification gas.
The technical solution adopted in the utility model is：
A kind of emission-control equipment, including absorption tower body, the top of absorption tower body is exhaust outlet, and absorption tower sheet is internal
Demisting plate, rearmounted filter layer, low-temperature plasma module, shower, packing layer and fluid reservoir is disposed with from top to bottom, it is described
Packing layer include supporting plate, filler and the hold-down grid being sequentially distributed from lower to upper, the bottom of the shower is arranged
The bottom for having a liquid distribution trough, the absorption tower body is provided with an air inlet pipe, and the air inlet pipe is sequentially passed through from lower to upper
Fluid reservoir and supporting plate enter filler, and the top gas outlet of the air inlet pipe is provided with a gas distributor, the absorption
The outside of tower body is provided with an overflow chamber being connected with fluid reservoir, offers an overfall, institute at the top of the overflow chamber
A water pump is provided with the overflow room stated, and described water pump is connected with shower by pipeline.
Preferably, NaOH absorbing liquid in described liquid storage room, is stored, the liquid level of the NaOH absorbing liquid
Not higher than the 2/3 of fluid reservoir depth, the fluid reservoir are provided with a dosing mouth at the position higher than 2/3 region of fluid reservoir depth,
Described dosing mouth is connected with an automatic medicament feeding machine by chemical feed pipe, is provided with PH probes in described overflow room, described
PH probes are connected with automatic medicament feeding machine, and described automatic medicament feeding machine is connected with a medicine storing drum, and described medicine storing drum is built with hydrogen-oxygen
Change sodium solid.
Preferably, described low-temperature plasma module is photochemistry coupled low temperature plasma module, described photochemistry
Coupled low temperature plasma module includes insulation crust, corona pole plate, corona wire, pulse plasma generator and ultraviolet lamp, institute
Insulation crust two ends are stated to leading to, one end is gas input, and the other end is gas output end, the corona wire and ultraviolet lamp etc.
Alternate and be arranged in a straight line, constitute corona wire ultraviolet lamp group, the corona pole plate and corona wire ultraviolet lamp group interval are handed over
For arranged in parallel, it is fixed between the opposing sidewalls of insulation crust, the earth terminal and high-pressure side of the pulse plasma generator
Corona pole plate and corona wire is connect respectively, and pulse plasma generator is powered by regulated power supply, and ultraviolet lamp is powered by voltage-stabilized power supply,
Described rearmounted filter layer is followed successively by front orifice plate, packing area and rear orifice plate from lower to upper.
The utility model is increased gas-liquid to greatest extent and is contacted, promoted liquid phase mass transfer speed using spray liquid washing absorption
Rate, reaches the purpose for efficiently removing removing exhaust gas middle acid substance, and removes part organic exhaust gas molecule and peculiar smell, dust-removal and desulfurizing efficiency
Height, during using alkali wash water, up to 85%, equipment takes up an area less desulfuration efficiency, and easy for installation, water consumption, power consumption index are relatively low, resistance to
Burn into does not wear and tear, and long service life, equipment are reliable, safeguards simple, convenient, meanwhile, PH probes can real-time detect excessive
The pH value of absorbing liquid in flow chamber, and result of detection is fed back to into automatic medicament feeding machine, automatic medicament feeding machine according to the PH information for receiving,
Solid sodium hydroxide in control medicine storing drum is in time added in liquid storage room, and low temperature plasma is after solid-state, liquid, gaseous state
The 4th state of material afterwards, when applied voltage reaches the discharge voltage of gas, gas is breakdown, and generation includes electronics, various
Ion, atom and free radical are in interior mixture, although electron temperature is very high in discharge process, heavy particle temperature is very low, whole
Individual system is presented low-temperature condition, so referred to as low temperature plasma, low-temperature plasma degradation pollutant is using these high energy
Pollutant effect in electronics, free radical isoreactivity particle and waste gas, makes contaminant molecule decompose within the extremely short time,
And there are follow-up various reactions to reach the purpose of degradation of contaminant, plasma reaction area is rich in high material, such as high
Energy electronics, ion, free radical and excited state molecule etc., the material that the polluter in waste gas can have higher-energy with these are sent out
Raw reaction, makes polluter decompose within the extremely short time, and follow-up various reactions occurs to reach explanation pollutant
Purpose, low temperature plasma be generally used to process VOC organic exhaust gas, the high energy electron produced when being using electrion and
Ion, waste gas decomposition molecule, while high energy electron resolves into two oxygen atoms oxygen molecule, and with oxygen molecule further in conjunction with into smelly
Oxygen, ozone are strong oxidizers, can aoxidize organic pollution, and hydrone is resolved into hydroxyl radical free radical, and Strong oxdiative by bombardment
The electromagnetic field of ultraviolet and low-temperature plasma equally can be organically combined into an entirety, ultraviolet with oxidation of organic compounds by agent
Irradiation can promote reaction effect and the speed of low-temperature plasma, improve treatment effeciency.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
In figure：1. absorption tower body, 2. exhaust outlet, 3. demisting plate, 4. rearmounted filter layer, 5. low-temperature plasma module, 6.
Shower, 7. packing layer, 71. supporting plates, 72. fillers, 73. hold-down grids, 8. fluid reservoir, 9. air inlet pipe, 10. overflow
Room, 11. overfalls, 12. water pumps, 13. pipelines, 14. NaOH absorbing liquids, 15. dosing mouths, 16. chemical feed pipes, 17. add automatically
Medicine machine, 18.PH probes, 19. medicine storing drums, 20. valves.
Specific embodiment
Below by specific embodiment and combine accompanying drawing the utility model is described in further detail.
Embodiment 1
As shown in figure 1, a kind of emission-control equipment, including absorption tower body 1, the top of absorption tower body 1 is exhaust outlet
2, be disposed with absorption tower body 1 from top to bottom demisting plate 3, rearmounted filter layer 4, low-temperature plasma module 5, shower 6,
Packing layer 7 and fluid reservoir 8, described packing layer 7 include supporting plate 71, filler 72 and the filler being sequentially distributed from lower to upper
Pressing plate 73, the bottom of the shower 6 are provided with a liquid distribution trough, and the bottom of the absorption tower body 1 is provided with an air inlet
Pipe 9, the air inlet pipe 9 sequentially passes through fluid reservoir 8 from lower to upper and supporting plate 71 enters filler 72, the air inlet pipe 9
Top gas outlet is provided with a gas distributor, the outside of the absorption tower body 1 be provided with one be connected with fluid reservoir 8 it is excessive
Flow chamber 10, the top of the overflow chamber 10 offer an overfall 11, are provided with a water pump 12 in described overflow chamber 10, described
Water pump 12 be connected with shower 6 by pipeline 13, be provided with a valve 20 between described shower 6 and pipeline 13.
NaOH absorbing liquid 14 is stored in described fluid reservoir 8, the liquid level of the NaOH absorbing liquid 14 is not high
In the 2/3 of 8 depth of fluid reservoir, the fluid reservoir 8 is provided with a dosing mouth 15 at the position higher than 8 depth of fluid reservoir, 2/3 region,
Described dosing mouth 15 is connected with an automatic medicament feeding machine 17 by chemical feed pipe 16, is provided with PH probes in described overflow chamber 10
18, described PH probes 18 are connected with automatic medicament feeding machine 17, and described automatic medicament feeding machine 17 is connected with a medicine storing drum 19, described
Medicine storing drum 19 is built with sodium hydrate solid.
Described low-temperature plasma module 5 be photochemistry coupled low temperature plasma module, described photochemistry coupled low temperature
Plasma module includes insulation crust, corona pole plate, corona wire, pulse plasma generator and ultraviolet lamp, outside the insulation
To leading to, one end is gas input, and the other end is gas output end, and the corona wire and ultraviolet lamp replace at equal intervals at shell two ends
It is arranged in a straight line, constitutes corona wire ultraviolet lamp group, the corona pole plate and corona wire ultraviolet lamp group alternates parallel
Row, are fixed between the opposing sidewalls of insulation crust, and the earth terminal and high-pressure side of the pulse plasma generator connect electricity respectively
Dizzy pole plate and corona wire, pulse plasma generator are powered by regulated power supply, and ultraviolet lamp is powered by voltage-stabilized power supply, it is described after
Put filter layer 4 and be followed successively by front orifice plate, packing area and rear orifice plate from lower to upper, for filtering the impurity such as the grit in waste gas.
Low temperature plasma is the 4th state of material after solid-state, liquid, gaseous state, when applied voltage reaches putting for gas
During piezoelectric voltage, gas is breakdown, produces including the mixture including electronics, various ions, atom and free radical, in discharge process
Although electron temperature is very high, heavy particle temperature is very low, and whole system is presented low-temperature condition, so referred to as low temperature plasma,
Low-temperature plasma degradation pollutant is made using the pollutant in these high energy electrons, free radical isoreactivity particle and waste gas
With making contaminant molecule decompose within the extremely short time, and follow-up various reactions occur to reach degradation of contaminant
Purpose, plasma reaction area are rich in high material, and such as high energy electron, ion, free radical and excited state molecule etc., in waste gas
The polluter material that can have higher-energy with these react, polluter is occurred within the extremely short time point
Solution, and there are follow-up various reactions to reach the purpose of explanation pollutant, it is organic that low temperature plasma is generally used to process VOC
Waste gas, the high energy electron produced when being using electrion and ion, waste gas decomposition molecule, while high energy electron is oxygen molecule
Two oxygen atoms are resolved into, and with oxygen molecule further in conjunction with into ozone, ozone are strong oxidizers, can aoxidize organic pollution,
Hydrone is resolved into hydroxyl radical free radical, and strong oxidizer by bombardment, equally can be with oxidation of organic compounds, by ultraviolet and low temperature etc.
The electromagnetic field of ion is organically combined into an entirety, and ultraviolet irradiation can promote reaction effect and the speed of low-temperature plasma,
Improve treatment effeciency.
Filler is placed on supporting plate with huddling mode, and hold-down grid is installed in the top of filler, in case being raised gas
Stream blows, and NaOH absorbing liquid is sprayed on filler from shower Jing liquid distribution troughs, and is flowed down along filler surface, gas from
Bottom of towe is sent into, and continues through the space of packing layer with NaOH absorbing liquid in adverse current, and on filler surface, gas-liquid two-phase is close
Contact carries out mass transfer.
Claims (3)
1. a kind of emission-control equipment, it is characterised in that including absorption tower body (1), the top of absorption tower body (1) is exhaust
Demisting plate (3), rearmounted filter layer (4), low-temperature plasma module is disposed with from top to bottom in mouth (2), absorption tower body (1)
(5), shower (6), packing layer (7) and fluid reservoir (8), described packing layer (7) include the filler being sequentially distributed from lower to upper
Support plate (71), filler (72) and hold-down grid (73), the bottom of shower (6) are provided with a liquid distribution trough, described
The bottom of absorption tower body (1) is provided with an air inlet pipe (9), air inlet pipe (9) sequentially pass through from lower to upper fluid reservoir (8) and
Supporting plate (71) enters filler (72), and the top gas outlet of air inlet pipe (9) is provided with a gas distributor, the suction
The outside for receiving tower body (1) is provided with an overflow chamber (10) being connected with fluid reservoir (8), opens at the top of overflow chamber (10)
An overfall (11) is provided with, a water pump (12) in described overflow chamber (10), is provided with, described water pump (12) passes through pipeline
(13) it is connected with shower (6).
2. a kind of emission-control equipment according to claim 1, it is characterised in that stores in described fluid reservoir (8)
NaOH absorbing liquid (14), the 2/3 of liquid level not higher than fluid reservoir (8) depth of NaOH absorbing liquid (14), it is described
Fluid reservoir (8) is provided with a dosing mouth (15), described dosing mouth (15) at the position higher than 2/3 region of fluid reservoir (8) depth
It is connected with an automatic medicament feeding machine (17) by chemical feed pipe (16), in described overflow chamber (10), is provided with PH probes (18), institute
The PH probes (18) stated are connected with automatic medicament feeding machine (17), and described automatic medicament feeding machine (17) is connected with a medicine storing drum (19), institute
The medicine storing drum (19) stated is built with sodium hydrate solid.
3. a kind of emission-control equipment according to claim 2, it is characterised in that described low-temperature plasma module (5)
For photochemistry coupled low temperature plasma module, described photochemistry coupled low temperature plasma module includes insulation crust, corona discharge electrode
Plate, corona wire, pulse plasma generator and ultraviolet lamp, to leading to, one end is gas input, separately at the insulation crust two ends
One end is gas output end, and the corona wire and ultraviolet lamp are alternately arranged in a straight line at equal intervals, constitute corona wire ultraviolet lamp
Group, the corona pole plate and corona wire ultraviolet lamp group alternate it is arranged in parallel, be fixed on insulation crust opposing sidewalls it
Between, the earth terminal and high-pressure side of the pulse plasma generator connect corona pole plate and corona wire respectively, and pulse plasma occurs
Device is powered by regulated power supply, and ultraviolet lamp is powered by voltage-stabilized power supply, and described rearmounted filter layer (4) is followed successively by front hole from lower to upper
Plate, packing area and rear orifice plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621068535.3U CN206027403U (en) | 2016-09-21 | 2016-09-21 | Waste gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621068535.3U CN206027403U (en) | 2016-09-21 | 2016-09-21 | Waste gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206027403U true CN206027403U (en) | 2017-03-22 |
Family
ID=58296110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621068535.3U Expired - Fee Related CN206027403U (en) | 2016-09-21 | 2016-09-21 | Waste gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206027403U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174936A (en) * | 2017-06-28 | 2017-09-19 | 中国联合工程公司 | High concentration VOC waste gas pretreatment system and its operation method containing phenol, formaldehyde |
| CN116036848A (en) * | 2022-08-02 | 2023-05-02 | 扬州嘉明环保科技有限公司 | Industrial sulfuric acid waste gas emission treatment equipment |
-
2016
- 2016-09-21 CN CN201621068535.3U patent/CN206027403U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174936A (en) * | 2017-06-28 | 2017-09-19 | 中国联合工程公司 | High concentration VOC waste gas pretreatment system and its operation method containing phenol, formaldehyde |
| CN116036848A (en) * | 2022-08-02 | 2023-05-02 | 扬州嘉明环保科技有限公司 | Industrial sulfuric acid waste gas emission treatment equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20170921 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |