CN1583223A - Gas-liquid exchanging tower - Google Patents
Gas-liquid exchanging tower Download PDFInfo
- Publication number
- CN1583223A CN1583223A CN 200410044981 CN200410044981A CN1583223A CN 1583223 A CN1583223 A CN 1583223A CN 200410044981 CN200410044981 CN 200410044981 CN 200410044981 A CN200410044981 A CN 200410044981A CN 1583223 A CN1583223 A CN 1583223A
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- Prior art keywords
- liquid
- gas
- ring
- tower body
- tower
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 6
- 241000282326 Felis catus Species 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 239000003546 flue gas Substances 0.000 description 15
- 239000000428 dust Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 12
- 239000003500 flue dust Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005201 scrubbing Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 241001212038 Arcola Species 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 241000220317 Rosa Species 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
A gas-liquid exchange tower features that in the cylindrical tower body, there are central liquid-spraying tube, radial spraying head on the liquid-spraying tube, multiply layers of baffle channel consisting of umbrella-shaped collcting ring and guide tray, liquid removing plate, and liquid collecting hopper.
Description
Technical field:
The present invention relates to environmental protection and chemical industry equipment, a kind of gas-liquid exchange tower of realizing flue gas ash removal or finishing chemical industry washing, absorption technique that exchanges by gas-liquid of more specifically saying so.
Background technology:
In the environmental protection industry, deduster mainly is divided into two kinds of dry type and wet types, and dry dust removal is based on multi-cyclone formula, cloth-bag type, electrostatic, and wet scrubber is based on moisture film, Wen Qiuli pipe, spray.Along with continuous progress in science and technology, the deduster of function admirables such as wet electrostatic formula dedusting has appearred again.But various dissimilar dedusters exist disadvantage separately respectively in concrete the application, comprising:
Though a, dry collector price are lower, efficiency of dust collection is also lower, and dust concentration and blackness index are difficult to reach " emission standard of air pollutants for boilers " (GB13271-2001) secondary standard, do not have desulfurizing function substantially.
B, wet scrubber have certain desulphurizing ability, and the depositing dust ability is also relatively good, but equipment manufacturing cost is higher, and floor space is big, and dust waste water subsequent treatment floor space is big.
C, the compound type dust remover of development in recent years comprise that wet electrostatic, static moisture film, spraying foam, jet desulfurization, pulse bag etc. have price height, defective that floor space is big equally, and maintenance capacity are big.
For a long time, the arcola flue dust in city and cities and towns is a problem that is difficult to administer always, especially in the producing coal city or the area all the more so.
In the Chemical Manufacture industry, the tower equipment that scrubbing tower, absorption tower etc. is used for the gas-liquid exchange is the common equipment of chemical industry, and regular situation is that liquid sprays down from the tower top, and gas enters from the tower below.In order to allow gas-liquid fully contact, often to place a large amount of fillers in the tower, comprise and improve Pall ring, Raschig ring, rectangular saddle ring, cascade ring, Haier's ring etc., to increase contact area, improve contacting efficiency.At tens meters to tens meters, cost is very expensive usually for the height of this class tower.
Summary of the invention:
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of gas-liquid exchange tower is provided, and this gas-liquid exchange tower is in the hope of embodying advantage aspect following:
1, gas liquid high-efficiency contact, reduction tower body height;
2, do not use filler;
3, cleaning solution can reclaim again and use;
4, reduce cost significantly.
The technical scheme that technical solution problem of the present invention is adopted is:
The present invention adopts tower structure, and its design feature is:
A, in its cylindric tower body, be in its central shaft position sparge pipe be set, radially fog-spray nozzle is set on the sparge pipe, stretch out cat head as the sparge pipe top mouth of pipe of circulation fluid inlet;
B, in described tower body, multilayer baffling passage is set, every layer of baffling passage is made of collecting ring that is umbrella cover and the flow guiding disc that is positioned at the collecting ring top that is umbrella cover equally, wherein, collecting ring is arranged on the tower body madial wall, gas-liquid channel is positioned at its ring central authorities, and flow guiding disc is fixedly installed on the sparge pipe, and gas-liquid channel is positioned at the dish periphery;
C, in described tower body, the position that is positioned under the air stream outlet is provided with liquid-removing plate, tower body bottom is provided with liquid collecting bucket, be provided with the overflow pipe of restriction liquid level in the liquid collecting bucket, the bottom of liquid collecting bucket is provided with slag-drip opening, and the gas access is positioned at the liquid collecting bucket top, and is obliquely installed to side-lower.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention has structurally changed the traditional form on scrubbing tower, absorption tower, sets up new Design Mode and computational methods theoretically; The gas liquid high-efficiency contact, the height of reduction absorption tower, scrubbing tower, minimizing volume; Do not use filler; Cleaning solution can reclaim again and use; Be applied to reduce equipment manufacturing cost significantly in the various tower gas-liquid switching equipment.
2, as deduster, the present invention is a kind of wet type composite highly effective dust arrester, has dedusting, desulfurizing function concurrently; Efficiency of dust collection can be stabilized in more than 95%; Water for dust removal can obtain collecting and recycling, and saves the water yield, protection environment; Price is low, lacks 50%-70% than water dust scrubber; Floor space is little, can install and use in the boiler room, is particularly useful for the retro-combustion arcola.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a collecting ring assembly structure schematic diagram of the present invention.
Fig. 3 is that the present invention is as flue gas ash removal tower structure schematic diagram.
Fig. 4 is a filter structural representation in the flue gas ash removal tower shown in Figure 3.
Fig. 5 is Fig. 4 side view.
Fig. 6 is the sparge pipe structural representation in Fig. 4 and the structure shown in Figure 5.
Number in the figure: 1 tower body, 2 sparge pipes, 3 collecting rings, 4 flow guiding discs, 5 air stream outlets, 6 liquid-removing plates, 7 liquid collecting buckets, 8 gas accesses, 9 slag-drip openings, 10 gussets, 11 backing rings, 12 circulation fluids inlet, 13 overflow pipes, 14 filtering ponds, 15 air exhausters, 16 filter frameworks, 17 screen packs, 18 wash away water pipe, 19 spurt holes.
The specific embodiment:
Referring to accompanying drawing, adopt tower structure, in its cylindric tower body 1, be in its central shaft position sparge pipe 2 is set, radially fog-spray nozzle is set on the sparge pipe 2, on each fog-spray nozzle a plurality of spray holes can be arranged, stretch out cat head as the sparge pipe top mouth of pipe of circulation fluid inlet 12.The radially sprinkling that is formed water by spray holes atomizes, and can effectively raise the efficiency, and the direction of spray holes also can suitably be set, and makes spray direction consistent with the air-flow direction of rotation, and the oblique below of deflection.
As shown in Figure 1, in tower body 1, multilayer baffling passage is set, every layer of baffling passage is made of collecting ring 3 that is umbrella cover and the flow guiding disc 4 that is positioned at collecting ring 3 tops that is umbrella cover equally, and the end play between collecting ring 3 and the flow guiding disc 4 is adjustable.In concrete the enforcement, collecting ring 3 is arranged on tower body 1 madial wall, and gas-liquid channel is positioned at its ring central authorities, and flow guiding disc 4 is fixedly installed on the sparge pipe 2, and gas-liquid channel is positioned at the dish periphery; By regulating the height of jet pipe 2, can change the end play between collecting ring 3 and the flow guiding disc 4, thereby change the friction between gas flow rate, change gas and collecting ring and the flow guiding disc, so that it can adapt to gas-liquid exchange of number of different types.The number of plies of baffling passage can be provided with as required.
In tower body 1, the position that is positioned under the air stream outlet 5 is provided with liquid-removing plate 6, the bottom of tower body 1 is provided with the liquid collecting bucket 7 of slag-drip opening 9, gas access 8 is positioned at the top of liquid collecting bucket 7, and be obliquely installed to side-lower, it on the one hand is in order to make air-flow can spray to the water surface in the liquid collecting bucket, it to be rotated along the tower body inwall that the gas access is obliquely installed to side-lower.In order to limit the liquid level in the liquid collecting bucket 7, overflow pipe 13 can be set in liquid collecting bucket 7.
Referring to Fig. 2, for the ease of assembling, collecting ring 3 adopts the stent-type assembling, its support is that gusset 10 and the annular backing ring 11 that is lifted on the tower body madial wall by gusset 10 constitute, gusset 10 and backing ring 11 are fixedly welded on the tower body madial wall, collecting ring 3 is placed on the backing ring 11, and the internal diameter of backing ring 11 should be less than the external diameter of collecting ring 3, and greater than the external diameter of flow guiding disc 4.
Use as deduster:
At first, with lead the water surface in the tower bottom liquid collecting bucket of high-temperature flue gas, high-temperature flue gas causes part to be subjected to hot water to become steam, forms the nucleus of countless seizure flue dust, flue gas obtains expansion simultaneously, flow velocity slows down, and the bulky grain flue dust enters water body under gravity and vapor action, and part granule flue dust is assembled with steam, under the gravity effect, drop in the bottom water, owing to structurally taked the measure of inclination air inlet, flue gas is rotated in tower body, quickened the flue dust sedimentation.High-temperature flue gas obtains cooling, helps the material selection of deduster.Radially water spray on the sparge pipe is lowered the temperature further depositing dust.Flue gas is through expansion, and flow velocity slows down, and overturns between collecting ring and flow guiding disc, and simultaneously radially spray water flue gas is washed in the center, and the fine particle major part is attached to the surface of collecting ring and flow guiding disc, and with under the current.Flue gas is turned back in multilayer baffling passage, through repeatedly poly-, be washed after expanding totally, dewater on the top of tower, depositing dust, moisture content and fine particle with in the reduction flue gas discharge from chimney, thereby finish dedusting work.
In addition,, can specifically adopt version as shown in Figure 3, be included in cat head and air exhauster 15 is set, filtering ponds 14 are set at the bottom of tower, by slag-drip opening 9 effluent discharge slags as the flue gas ash removal tower.The liquid that overflows from overflow pipe 13 directly injects filtering ponds 14, upright just like Fig. 4, Fig. 5 and filter shown in Figure 6 in filtering ponds 14, filter is to fixedly install screen pack 17 on filter framework 16, in a side in face of current, water pipe 18 is washed away in setting, according to the height of wire side, wash away more than water pipe 18 can have together, shown in Fig. 4 be about twice.As Fig. 5, shown in Figure 6, on the tube wall that washes away water pipe 18, offer spurt hole 19 towards screen pack 17 side-lowers, constantly washing away screen pack 17 by the current that spray in the spurt hole 19, screen pack 17 is not stopped up by particle.
At flue gas ash removal, can suitably reduce the level of the baffling passage in the tower body, Figure 3 shows that bilayer.
At high-temperature flue gas, can be in the gas access 8 position install asbestos board additional, in order to heat insulation, with the protection tower body.
Use as chemical industry equipment:
Entered from the gas access by exchanging gas, air-flow is directed to the tower body sidewall, and along the sidewall rotation, gas-liquid contact under the spray effect.When air-flow rose, flow velocity was accelerated, and collected through collecting ring, and expansion under the flow guiding disc compressing fully contacts with fog-like liquid.Repeat for several times, finish washing, absorb or exchange.
In addition, the liquid that is overflowed by overfall can directly recycle, and also can recycle through after the suitable processing as the case may be.
Claims (5)
1, gas-liquid exchange tower adopts tower structure, it is characterized in that:
A, in its cylindric tower body (1), be in its central shaft position sparge pipe (2) be set, sparge pipe is provided with radially fog-spray nozzle on (2), stretches out cat head as the sparge pipe top mouth of pipe of circulation fluid inlet (12);
B, in described tower body (1), multilayer baffling passage is set, every layer of baffling passage is made of collecting ring that is umbrella cover (3) and the flow guiding disc (4) that is positioned at the collecting ring top that is umbrella cover equally, wherein, collecting ring (3) is arranged on the madial wall of tower body (1), gas-liquid channel is positioned at its ring central authorities, and flow guiding disc (4) is fixedly installed on the sparge pipe (2), and gas-liquid channel is positioned at the dish periphery;
C, in described tower body (1), the position that is positioned under the air stream outlet (5) is provided with liquid-removing plate (6), the tower body bottom is provided with liquid collecting bucket (7), be provided with the overflow pipe (13) of restriction liquid level in the liquid collecting bucket (7), the bottom of liquid collecting bucket is provided with slag-drip opening (9), gas access (8) is positioned at the liquid collecting bucket top, and is obliquely installed to side-lower.
2, gas-liquid exchange tower according to claim 1, the end play between described collecting ring of its feature (3) and the flow guiding disc (4) is adjustable.
3, gas-liquid exchange tower according to claim 1, it is characterized in that described collecting ring (3) adopts the stent-type assembling, described support is to be made of gusset (10) and the annular backing ring (11) that is lifted on tower body (1) madial wall by gusset (10), gusset (10) and backing ring (11) are fixedly installed on the tower body madial wall, collecting ring (3) is placed on the backing ring (11), the internal diameter of backing ring (11) is less than the external diameter of collecting ring (3), and greater than the external diameter of flow guiding disc (4).
4, gas-liquid exchange tower according to claim 1, it is characterized in that filtering ponds (14) being set in the bottom of described tower body (1), in filtering ponds (14), upright filter is arranged, filter is to fixedly install screen pack (17) on filter framework (16), in a side in face of current, water pipe (18) is washed away in setting, washes away the spurt hole (19) that offers on the tube wall of water pipe (18) towards screen pack (17) side-lower.
5, gas-liquid exchange tower according to claim 1 is characterized in that the position of in the gas access (8) installs asbestos board additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044981 CN1230240C (en) | 2004-06-02 | 2004-06-02 | Gas-liquid exchanging tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044981 CN1230240C (en) | 2004-06-02 | 2004-06-02 | Gas-liquid exchanging tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1583223A true CN1583223A (en) | 2005-02-23 |
| CN1230240C CN1230240C (en) | 2005-12-07 |
Family
ID=34601856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410044981 Expired - Fee Related CN1230240C (en) | 2004-06-02 | 2004-06-02 | Gas-liquid exchanging tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1230240C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059031A (en) * | 2010-11-27 | 2011-05-18 | 赵艳萍 | Gas filter device |
| ITMI20131514A1 (en) * | 2013-09-12 | 2015-03-13 | Innovation In Sciences & Technologi Es S R L | METHOD AND SYSTEM FOR FLUID STREAM CHEMICAL COMPOUNDS COLLECTION, DEPOSITION AND SEPARATION |
| CN104474829A (en) * | 2014-12-18 | 2015-04-01 | 浙江洁宇环保装备科技有限公司 | Mixed multistage dust collector |
| CN106334405A (en) * | 2016-10-18 | 2017-01-18 | 威洁（石狮）中水回用技术有限公司 | Oil adsorption and centrifugal-removal device and high-temperature exhaust gas oil removal system and method |
| CN107469529A (en) * | 2017-08-09 | 2017-12-15 | 郑州阿波罗肥业有限公司 | Wet type composite fertilizer tail gas dust cleaning apparatus |
| CN110013741A (en) * | 2019-05-15 | 2019-07-16 | 山东洲星生物技术有限公司 | A kind of sulfur method using flue desulfurization assembling module |
| CN110813005A (en) * | 2019-11-29 | 2020-02-21 | 湖南工艺美术职业学院 | Multistage filtration recovery processing equipment is prevented blockking up by dust for industrial ceramic material production |
| CN112546843A (en) * | 2020-11-11 | 2021-03-26 | 常德市金沅锅炉制造有限公司 | Energy-concerving and environment-protective type msw incineration flue gas treatment equipment |
-
2004
- 2004-06-02 CN CN 200410044981 patent/CN1230240C/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059031B (en) * | 2010-11-27 | 2013-06-12 | 赵艳萍 | Gas filter device |
| CN102059031A (en) * | 2010-11-27 | 2011-05-18 | 赵艳萍 | Gas filter device |
| US10279310B2 (en) | 2013-09-12 | 2019-05-07 | Is Clean Air Italia S.R.L. | Method and system for fluid stream chemical compounds collection, deposition and separation |
| ITMI20131514A1 (en) * | 2013-09-12 | 2015-03-13 | Innovation In Sciences & Technologi Es S R L | METHOD AND SYSTEM FOR FLUID STREAM CHEMICAL COMPOUNDS COLLECTION, DEPOSITION AND SEPARATION |
| WO2015036967A1 (en) * | 2013-09-12 | 2015-03-19 | Innovation In Sciences & Technologies S.R.L. | Method and system for fluid stream chemical compounds collection, deposition and separation |
| CN105828914A (en) * | 2013-09-12 | 2016-08-03 | 创新科学技术有限责任公司 | Method and system for collecting, depositing and separating chemical compounds of a fluid stream |
| JP2016533896A (en) * | 2013-09-12 | 2016-11-04 | イノベーション イン サイエンス アンド テクノロジース エス．アール．エル | Method and system for collection, deposition and separation of chemical compounds in a fluid stream |
| RU2705072C2 (en) * | 2013-09-12 | 2019-11-01 | Ис КЛИН ЭЙР ИТАЛИЯ С.р.л. | Method and system for collection, deposition and separation of chemical compounds in fluid medium flows |
| CN105828914B (en) * | 2013-09-12 | 2019-09-20 | Is净化空气意大利有限责任公司 | Method and system for collecting, depositing and separating chemical compounds of a fluid stream |
| AU2014319969B2 (en) * | 2013-09-12 | 2019-01-31 | Is Clean Air Italia S.R.L. | Method and system for fluid stream chemical compounds collection, deposition and separation |
| CN104474829A (en) * | 2014-12-18 | 2015-04-01 | 浙江洁宇环保装备科技有限公司 | Mixed multistage dust collector |
| CN106334405A (en) * | 2016-10-18 | 2017-01-18 | 威洁（石狮）中水回用技术有限公司 | Oil adsorption and centrifugal-removal device and high-temperature exhaust gas oil removal system and method |
| CN107469529A (en) * | 2017-08-09 | 2017-12-15 | 郑州阿波罗肥业有限公司 | Wet type composite fertilizer tail gas dust cleaning apparatus |
| CN110013741A (en) * | 2019-05-15 | 2019-07-16 | 山东洲星生物技术有限公司 | A kind of sulfur method using flue desulfurization assembling module |
| CN110013741B (en) * | 2019-05-15 | 2021-08-24 | 山东洲星生物技术有限公司 | Desulfurization method for flue desulfurization assembled module |
| CN110813005A (en) * | 2019-11-29 | 2020-02-21 | 湖南工艺美术职业学院 | Multistage filtration recovery processing equipment is prevented blockking up by dust for industrial ceramic material production |
| CN110813005B (en) * | 2019-11-29 | 2021-06-25 | 湖南工艺美术职业学院 | Multistage filtration recovery processing equipment is prevented blockking up by dust for industrial ceramic material production |
| CN112546843A (en) * | 2020-11-11 | 2021-03-26 | 常德市金沅锅炉制造有限公司 | Energy-concerving and environment-protective type msw incineration flue gas treatment equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1230240C (en) | 2005-12-07 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Anhui Huaihua Co., Ltd. Assignor: Chen Dunfeng Contract fulfillment period: 2008.9.26 to 2024.6.1 contract change Contract record no.: 2009340000046 Denomination of invention: Gas-liquid exchanging tower Granted publication date: 20051207 License type: Exclusive license Record date: 2009.4.20 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.26 TO 2024.6.1; CHANGE OF CONTRACT Name of requester: ANHUI HUAIHUA CO., LTD. Effective date: 20090420 |
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Owner name: ANHUI HUAIHUA CO., LTD. Free format text: FORMER OWNER: CHEN DUNFENG Effective date: 20120217 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120217 Address after: 232038 Anhui Huaihua Quanshan tianjia'an District Limited by Share Ltd Technology Development Center Patentee after: Anhui Huaihua Co., Ltd. Address before: 232001 Huainan environmental protection monitoring station, 42 Chaoyang Middle Road, Anhui, Huainan Patentee before: Chen Dunfeng |
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Granted publication date: 20051207 Termination date: 20160602 |