CN105817055A - Method and device for efficiently removing tar from ammonia water - Google Patents
Method and device for efficiently removing tar from ammonia water Download PDFInfo
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- CN105817055A CN105817055A CN201610352551.3A CN201610352551A CN105817055A CN 105817055 A CN105817055 A CN 105817055A CN 201610352551 A CN201610352551 A CN 201610352551A CN 105817055 A CN105817055 A CN 105817055A
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- ammonia
- absorbing liquid
- mixing channel
- benzene
- tar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/121—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing NH3 only (possibly in combination with NH4 salts)
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a method and device for efficiently removing tar from ammonia water .The method comprises the steps that after crude benzene and absorption liquid remaining ammonia water enter a mixing tank to be mixed, the tar in the absorption liquid remaining ammonia water is dissolved in the crude benzene; the mixed liquid is pumped into purifying equipment, disturbance is enhanced through a T-shaped distribution pipe, and the mixed liquid flows through a coalescer to enable benzene dissolving the tar and the absorption liquid remaining ammonia water to be separated; a baffle is arranged at the position behind the coalescer in the purifying equipment, the bottom of the portion, in front of the baffle, of the purifying equipment is provided with an absorption liquid draining port, and the upper portion of the portion, behind the baffle, of the purifying equipment is provided with a benzene outlet; benzene dissolving the tar overflows to the other side from the top of the baffle, drained from the benzene outlet to enter a buffer tank after standing is conducted for a period of time and then delivered to a crude benzene section regenerator to be regenerated; the absorption liquid remaining ammonia water is drained from the absorption liquid draining port to enter a H2S washing tower to be desulfurized .According to the method and device, the tar in absorption liquid of an AS circulation desulfurization technology can be effectively removed, blocking of heat exchange equipment and packing in the tower is prevented, the desulfurization efficiency of the system is guaranteed, the labor cost is reduced, and service life of the equipment is prolonged.
Description
Technical field
The present invention relates to desulfurization absorbing liquid purification techniques field, particularly relate to a kind of high-efficiency ammonia-water detar method and device being applicable to AS method coal gas desulfurization technique.
Background technology
AS method coal gas desulfurization technique is the ammonia sulfur removal technology with ammonia as alkali source, and this technique desulfuration efficiency is high, and ammonia and distilled ammonia wastewater in coal gas make full use of, and add alkali effective, non-secondary pollution, and heat utilization rate is high, is the sulfur removal technology of a kind of comparative maturity.
In actual applications, AS circulation fluid facies tract oil is the outstanding problem that this system is existing.Remained ammonia oil content after filtering requires to reach 20mg/L, although actual production taking various measure such as: by strengthening Gu Leng workshop section tar ammonia lock out operation, the standing separation time of increase remained ammonia, increasing oil extraction measure by each equipment in ceramic filter or the process of air supporting tar remover, system, formulate regular oil extraction and cleaning system, but all can not thoroughly be removed by the tar in absorbing liquid, oil removal efficiency typically can only achieve 20%～30%.Substantial amounts of tar is brought in desulphurization system, the problems such as the shower nozzle and filler blocking, the blocking of extracting tower filler, the heat transmission equipment blocking that cause such as scrubbing tower, after bringing ammonia still into, the heat exchanger of ammonia steaming system is forced frequently to unpick and wash and clean, huge human and material resources are caused to waste, aggravation equipment and the extent of corrosion of pipeline.
Summary of the invention
The invention provides a kind of high-efficiency ammonia-water detar method and device, can effectively remove the tar in AS circulation desulfurization technology absorbing liquid, prevent the blocking of heat transmission equipment and inner-tower filling material, it is ensured that the desulfuration efficiency of system, reduce cost of labor, improve service life of equipment.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of high-efficiency ammonia-water detar method, for purifying the absorbing liquid remained ammonia in AS circulation desulfurization technology；Comprise the steps:
1) the part crude benzol carrying out autospasy benzene workshop section crude benzol medial launder simultaneously enters mixing channel with absorbing liquid remained ammonia, makes the tar in absorbing liquid remained ammonia be dissolved in crude benzol after being sufficiently mixed；
2) by feed pump, the mixed liquor of crude benzol Yu absorbing liquid remained ammonia is pumped in cleaning equipment, and strengthened the disturbance of mixed liquor by the T-shaped distributor pipe arranged at inlet tube, make crude benzol dissolve the tar in remained ammonia further；In cleaning equipment, mixed liquor makes the benzene of dissolved tar separate with absorbing liquid remained ammonia after flowing through coalescer；
3) baffled in the cleaning equipment after coalescer, set absorbing liquid outlet bottom the cleaning equipment before baffle plate, the cleaning equipment top after baffle plate sets benzene outlet；The benzene of dissolved tar spills into opposite side from baffle plate top, is discharged into dashpot from benzene outlet, and is sent to the regenerator regeneration of crude benzol workshop section, indirectly provide raw material for Tuo Ben workshop section after standing a period of time；Absorbing liquid remained ammonia is discharged into H from absorbing liquid outlet2S scrubbing tower desulfurization.
Described step 1) in, crude benzol enters mixing channel by endless tube, and endless tube wall circular along mixing channel is arranged, and multiple tap hole circumferentially offered by endless tube, and crude benzol flows in mixing channel along mixing channel inwall from the tap hole of endless tube；Absorbing liquid remained ammonia enters mixing channel by the ammonia inlet pipe tangentially-arranged along mixing channel, is sufficiently mixed with crude benzol during rotational flow.
Cleaning equipment before described baffle plate is additionally provided with the real-time monitoring position of fluid level of level meters；When the numerical value of display is higher than height of baffle plate on level meters, increases absorbing liquid outlet flow, and open the reflux inlet being located at baffle plate after-purification device bottom, make partially liq be back in mixing channel.
Described step 3) in, Timing measurement tar content from the absorbing liquid that absorbing liquid outlet is discharged, when tar content is higher than setting, reduce absorbing liquid outlet flow.
For realizing the device of a kind of high-efficiency ammonia-water detar method, including mixing channel, cleaning equipment and dashpot, described mixing channel connects crude benzol pipeline and absorbing liquid remained ammonia pipeline respectively, and connects cleaning equipment by feed pump；Cleaning equipment is made up of tank body and coalescer, and tank body one side roof part sets inlet tube, sets coalescer in the middle part of tank body, baffled in opposite side tank body；Tank base between coalescer and baffle plate sets the H outside the connection of absorbing liquid outlet2S scrubbing tower, the tank body top after baffle plate sets benzene outlet and connects dashpot, and dashpot additionally connects regenerator.
Described mixing channel top is along setting endless tube, and endless tube wall circular along mixing channel is arranged, one end and crude benzol pipeline communication, circumferentially offers inside multiple tap hole connection mixing channel inside endless tube；Mixing channel bottom is connected along mixing channel tangentially-arranged ammonia inlet pipe, ammonia inlet pipe with absorbing liquid remained ammonia pipeline.
Described absorbing liquid outlet is provided with vortex shield.
Described inlet tube connects cleaning equipment tank interior by T-shaped distributor pipe, and the tank base of inlet tube side sets drain, and the tank body top of baffle plate side sets diffusion mouth.
It is additionally provided with level meters in tank body between described coalescer and baffle plate.
Tank base below the outlet of described benzene sets refluxing opening and connects mixing channel by reflux line, sets reflux inlet on the reflux line of refluxing opening.
Compared with prior art, the invention has the beneficial effects as follows:
1) by utilize crude benzol dissolve the tar in remained ammonia and use coalescer separation crude benzol and ammonia mixture by the way of tar in efficient removal absorbing liquid remained ammonia, the problem thoroughly eliminating the blocking of desulphurization system equipment；And making the heat transfer efficiency of wastewater heat exchange device improve, pipeline flow area increases, pump load reduces, and instrument shows normally, thus ensures that efflux wastewater is up to standard；
2), after the tar in efficient removal ammonia, eliminating needs artificial unloading's heat exchanger, manual cleaning ammonia still tower tray in the past, manually beats pipeline and remove the process such as tamper, and technical operation flow is convenient, fast, saves human cost；
3) crude benzol is Tuo Ben workshop section product, and whole purification process is invested without raw material；The crude benzol mixture of dissolved tar becomes the raw material of Tuo Ben workshop section, and non-secondary pollution produce are raw, protects environment；
4) in tank body, baffle plate is set, the crude benzol of twice standing separation dissolved tar and remained ammonia, increase the time of repose of separator, good separating effect；
5) mixing channel ammonia inlet pipe arranged tangential, can strengthen the disturbance of liquid, accelerates the dissolving of tar；
6) tank body arranges refluxing opening, and partially liq is reflowable in mixing channel, without discharging any waste liquor；
7) absorbing liquid outlet arranges vortex shield, can prevent eddy current；
8) device overall structure is simple, and processing ease is reasonable in design, is not required to transform original equipment and pipeline, reduces cost, and small investment, energy consumption is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-efficiency ammonia-water detar device of the present invention.
In figure: 1. mixing channel 2. feed pump 3.T type distributor pipe 4. inlet tube 5. tank body 6. coalescer 7. benzene exports 8. diffusion mouth 9. absorbing liquid outlet 10. drain 11. vortex shield 12. level meters 13. baffle plate 14. dashpot 15. refluxing opening 16. reflux inlet 17. endless tube 18. ammonia inlet pipes
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
A kind of high-efficiency ammonia-water detar method of the present invention, for purifying the absorbing liquid remained ammonia in AS circulation desulfurization technology；Comprise the steps:
1) the part crude benzol carrying out autospasy benzene workshop section crude benzol medial launder simultaneously enters mixing channel 1 with absorbing liquid remained ammonia, makes the tar in absorbing liquid remained ammonia be dissolved in crude benzol after being sufficiently mixed；
2) by feed pump 2, the mixed liquor of crude benzol Yu absorbing liquid remained ammonia is pumped in cleaning equipment, and strengthened the disturbance of mixed liquor by the T-shaped distributor pipe 3 arranged at inlet tube 4, make crude benzol dissolve the tar in remained ammonia further；In cleaning equipment, mixed liquor makes the benzene of dissolved tar separate with absorbing liquid remained ammonia after flowing through coalescer 6；
3) in the cleaning equipment after coalescer 6 baffled 13, setting absorbing liquid outlet 9 bottom the cleaning equipment before baffle plate 13, the cleaning equipment top after baffle plate 13 sets benzene outlet 7；The benzene of dissolved tar spills into opposite side from baffle plate 13 top, is discharged into dashpot 14 from benzene outlet 7, and is sent to the regenerator regeneration of crude benzol workshop section, indirectly provide raw material for Tuo Ben workshop section after standing a period of time；Absorbing liquid remained ammonia is discharged into H from absorbing liquid outlet 92S scrubbing tower desulfurization.
Described step 1) in, crude benzol enters mixing channel 1 by endless tube 17, and endless tube 17 wall circular along mixing channel 1 is arranged, and multiple tap hole circumferentially offered by endless tube 17, and crude benzol flows in mixing channel 1 along mixing channel 1 inwall from the tap hole of endless tube 17；Absorbing liquid remained ammonia, by entering mixing channel 1 along the ammonia inlet pipe 18 that mixing channel 1 is tangentially-arranged, is sufficiently mixed with crude benzol during rotational flow.
Cleaning equipment before described baffle plate 13 is additionally provided with the real-time monitoring position of fluid level of level meters 12；When the numerical value of display is higher than baffle plate 13 height on level meters 12, increases absorbing liquid outlet 9 flow, and open the reflux inlet 16 being located at baffle plate 13 after-purification device bottom, make partially liq be back in mixing channel 1.
Described step 3) in, Timing measurement tar content from the absorbing liquid that absorbing liquid outlet 9 is discharged, when tar content is higher than setting, reduce absorbing liquid outlet 9 flow.
As it is shown in figure 1, for the device realizing a kind of high-efficiency ammonia-water detar method, including mixing channel 1, cleaning equipment and dashpot 14, described mixing channel 1 connects crude benzol pipeline and absorbing liquid remained ammonia pipeline respectively, and connects cleaning equipment by feed pump 2；Cleaning equipment is made up of tank body 5 and coalescer 6, and tank body 5 one side roof part sets inlet tube 4, sets coalescer 6 in the middle part of tank body 5, in opposite side tank body 5 baffled 13；Set absorbing liquid outlet 9 bottom tank body 5 between coalescer 6 and baffle plate 13 and connect the H of outside2S scrubbing tower, tank body 5 top after baffle plate 13 sets benzene outlet 7 connection dashpot 14, and dashpot 14 additionally connects regenerator.
Described mixing channel 1 top is along setting endless tube 17, and endless tube 17 wall circular along mixing channel 1 is arranged, one end and crude benzol pipeline communication, circumferentially offers multiple tap hole connection mixing channel 1 internal inside endless tube 17；Mixing channel 1 bottom is along mixing channel tangentially-arranged ammonia inlet pipe 18, and ammonia inlet pipe 18 is connected with absorbing liquid remained ammonia pipeline.
Described absorbing liquid outlet 9 is provided with vortex shield 11.
It is internal that described inlet tube 4 connects cleaning equipment tank body 5 by T-shaped distributor pipe 3, sets drain 10 bottom the tank body 5 of inlet tube 4 side, and tank body 5 top of baffle plate 13 side sets diffusion mouth 8.
It is additionally provided with level meters 12 in tank body 5 between described coalescer 6 and baffle plate 13.
Set refluxing opening 15 bottom tank body 5 below described benzene outlet 7 and connect mixing channel 1 by reflux line, on the reflux line of refluxing opening 15, set reflux inlet 16.
The operation principle of the present invention is: utilize crude benzol can dissolve the characteristic of the tar in remained ammonia, first a small amount of crude benzol is uniformly mixed in mixing channel 1 with absorbing liquid remained ammonia, the disturbance of mixed liquor is strengthened again by T-shaped distributor pipe 3, make the abundant dissolved tar of crude benzol, finally utilize coalescer 6 to make the benzene of dissolved tar separate with absorbing liquid remained ammonia.
Coalescer 6 is a kind of liquid-liquid separation equipment, by the effect of cohesion, liquid impurities is become grade from micron order, break impurity gravity and balance of buoyancy in continuous phase, carry out settlement separate inside coalescer, thus reach the effect purified, in invention, coalescer 6 can make the benzene of dissolved tar separate with absorbing liquid remained ammonia.
Flange joint is passed through between inlet tube 4 and T-shaped distributor pipe 3.
When device of the present invention is properly functioning, reflux inlet 16 to periodically turn on.
The above; it is only the present invention preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; according to technical scheme and inventive concept equivalent or change in addition thereof, all should contain within protection scope of the present invention.
Claims (10)
1. a high-efficiency ammonia-water detar method, for purifying the absorbing liquid remained ammonia in AS circulation desulfurization technology；It is characterized in that, comprise the steps:
1) the part crude benzol carrying out autospasy benzene workshop section crude benzol medial launder simultaneously enters mixing channel with absorbing liquid remained ammonia, makes the tar in absorbing liquid remained ammonia be dissolved in crude benzol after being sufficiently mixed；
2) by feed pump, the mixed liquor of crude benzol Yu absorbing liquid remained ammonia is pumped in cleaning equipment, and strengthened the disturbance of mixed liquor by the T-shaped distributor pipe arranged at inlet tube, make crude benzol dissolve the tar in remained ammonia further；In cleaning equipment, mixed liquor makes the benzene of dissolved tar separate with absorbing liquid remained ammonia after flowing through coalescer；
3) baffled in the cleaning equipment after coalescer, set absorbing liquid outlet bottom the cleaning equipment before baffle plate, the cleaning equipment top after baffle plate sets benzene outlet；The benzene of dissolved tar spills into opposite side from baffle plate top, is discharged into dashpot from benzene outlet, and is sent to the regenerator regeneration of crude benzol workshop section, indirectly provide raw material for Tuo Ben workshop section after standing a period of time；Absorbing liquid remained ammonia is discharged into H from absorbing liquid outlet2S scrubbing tower desulfurization.
A kind of high-efficiency ammonia-water detar method the most according to claim 1, it is characterized in that, described step 1) in, crude benzol enters mixing channel by endless tube, endless tube wall circular along mixing channel is arranged, multiple tap hole circumferentially offered by endless tube, and crude benzol flows in mixing channel along mixing channel inwall from the tap hole of endless tube；Absorbing liquid remained ammonia enters mixing channel by the ammonia inlet pipe tangentially-arranged along mixing channel, is sufficiently mixed with crude benzol during rotational flow.
A kind of high-efficiency ammonia-water detar method the most according to claim 1, it is characterised in that be additionally provided with the real-time monitoring position of fluid level of level meters in the cleaning equipment before described baffle plate；When the numerical value of display is higher than height of baffle plate on level meters, increases absorbing liquid outlet flow, and open the reflux inlet being located at baffle plate after-purification device bottom, make partially liq be back in mixing channel.
A kind of high-efficiency ammonia-water detar method the most according to claim 1, it is characterized in that, described step 3) in, Timing measurement tar content from the absorbing liquid that absorbing liquid outlet is discharged, when tar content is higher than setting, reduce absorbing liquid outlet flow.
5. for realizing the device of a kind of high-efficiency ammonia-water detar method described in claim 1, it is characterized in that, including mixing channel, cleaning equipment and dashpot, described mixing channel connects crude benzol pipeline and absorbing liquid remained ammonia pipeline respectively, and connects cleaning equipment by feed pump；Cleaning equipment is made up of tank body and coalescer, and tank body one side roof part sets inlet tube, sets coalescer in the middle part of tank body, baffled in opposite side tank body；Tank base between coalescer and baffle plate sets the H outside the connection of absorbing liquid outlet2S scrubbing tower, the tank body top after baffle plate sets benzene outlet and connects dashpot, and dashpot additionally connects regenerator.
A kind of high-efficiency ammonia-water detar device the most according to claim 5, it is characterized in that, described mixing channel top is along setting endless tube, and endless tube wall circular along mixing channel is arranged, one end and crude benzol pipeline communication, circumferentially offer inside endless tube inside multiple tap hole connection mixing channel；Mixing channel bottom is connected along mixing channel tangentially-arranged ammonia inlet pipe, ammonia inlet pipe with absorbing liquid remained ammonia pipeline.
A kind of high-efficiency ammonia-water detar device the most according to claim 5, it is characterised in that described absorbing liquid outlet is provided with vortex shield.
A kind of high-efficiency ammonia-water detar device the most according to claim 5, it is characterised in that described inlet tube connects cleaning equipment tank interior by T-shaped distributor pipe, and the tank base of inlet tube side sets drain, and the tank body top of baffle plate side sets diffusion mouth.
A kind of high-efficiency ammonia-water detar device the most according to claim 5, it is characterised in that be additionally provided with level meters in the tank body between described coalescer and baffle plate.
A kind of high-efficiency ammonia-water detar device the most according to claim 5, it is characterised in that the tank base below the outlet of described benzene sets refluxing opening and connects mixing channel by reflux line, sets reflux inlet on the reflux line of refluxing opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610352551.3A CN105817055A (en) | 2016-05-25 | 2016-05-25 | Method and device for efficiently removing tar from ammonia water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610352551.3A CN105817055A (en) | 2016-05-25 | 2016-05-25 | Method and device for efficiently removing tar from ammonia water |
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| Publication Number | Publication Date |
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| CN105817055A true CN105817055A (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610352551.3A Pending CN105817055A (en) | 2016-05-25 | 2016-05-25 | Method and device for efficiently removing tar from ammonia water |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827606A (en) * | 1981-08-10 | 1983-02-18 | Nippon Kokan Kk <Nkk> | Apparatus for removing tar component in ammonia liquor |
| CN101829439A (en) * | 2009-11-27 | 2010-09-15 | 胜利油田胜利勘察设计研究院有限公司 | Ultrasonic coagulation type three-phase separator |
| CN102491443A (en) * | 2011-12-15 | 2012-06-13 | 中冶焦耐(大连)工程技术有限公司 | Technology and equipment using crude benzol to removing tar in residual ammonia water |
| CN202785726U (en) * | 2012-07-30 | 2013-03-13 | 中冶焦耐工程技术有限公司 | Spray extraction type tar-removing apparatus |
| CN203568863U (en) * | 2013-11-18 | 2014-04-30 | 中冶焦耐工程技术有限公司 | Coalescence tar removal device applied to tar ammonia water separation system |
| CN203916150U (en) * | 2014-05-30 | 2014-11-05 | 烟台国邦化工机械科技有限公司 | A kind of oil water separator |
| CN104261515A (en) * | 2014-10-16 | 2015-01-07 | 华东理工大学 | Method and device for separating tar from surplus ammonia solution |
-
2016
- 2016-05-25 CN CN201610352551.3A patent/CN105817055A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827606A (en) * | 1981-08-10 | 1983-02-18 | Nippon Kokan Kk <Nkk> | Apparatus for removing tar component in ammonia liquor |
| CN101829439A (en) * | 2009-11-27 | 2010-09-15 | 胜利油田胜利勘察设计研究院有限公司 | Ultrasonic coagulation type three-phase separator |
| CN102491443A (en) * | 2011-12-15 | 2012-06-13 | 中冶焦耐(大连)工程技术有限公司 | Technology and equipment using crude benzol to removing tar in residual ammonia water |
| CN202785726U (en) * | 2012-07-30 | 2013-03-13 | 中冶焦耐工程技术有限公司 | Spray extraction type tar-removing apparatus |
| CN203568863U (en) * | 2013-11-18 | 2014-04-30 | 中冶焦耐工程技术有限公司 | Coalescence tar removal device applied to tar ammonia water separation system |
| CN203916150U (en) * | 2014-05-30 | 2014-11-05 | 烟台国邦化工机械科技有限公司 | A kind of oil water separator |
| CN104261515A (en) * | 2014-10-16 | 2015-01-07 | 华东理工大学 | Method and device for separating tar from surplus ammonia solution |
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Effective date of registration: 20180727 Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Applicant after: ACRE Coking And Refractory (Dalian) Engineering Consulting Corp., MCC Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Applicant before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC |
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Application publication date: 20160803 |