EP2087281A2 - Method and device for removing solids deposited on the bottom of a pipe - Google Patents
Method and device for removing solids deposited on the bottom of a pipeInfo
- Publication number
- EP2087281A2 EP2087281A2 EP07819879A EP07819879A EP2087281A2 EP 2087281 A2 EP2087281 A2 EP 2087281A2 EP 07819879 A EP07819879 A EP 07819879A EP 07819879 A EP07819879 A EP 07819879A EP 2087281 A2 EP2087281 A2 EP 2087281A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- radial
- cooling water
- outside
- center
- 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
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007787 solid Substances 0.000 title claims abstract description 6
- 239000000498 cooling water Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000002918 waste heat Substances 0.000 claims abstract description 11
- 238000000151 deposition Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 238000004061 bleaching Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000859095 Bero Species 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/52—Washing-out devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/54—De-sludging or blow-down devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/56—Boiler cleaning control devices, e.g. for ascertaining proper duration of boiler blow-down
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0229—Double end plates; Single end plates with hollow spaces
Definitions
- the blowdown is usually carried out at the bottom of the connected steam drum, possibly with an additional Abschlämmitzkeit the shell emptying of the boiler itself.
- boiler damage Another factor influencing boiler damage is the concentration of impurities in the boiler feed water, which settle in zones of high steam production. Therefore, boiler damage is always concentrated on the hot legs of the tube bundle while the cold legs remain undamaged. An optimized design for a vertical boiler must therefore consider and optimize all these factors.
- this object is achieved according to the invention in that a forced flow of the cooling water in the region of the tube bottom surface is effected by a plurality of angles to the vertical, introduced in the tube plate cooling holes.
- the forced flow is effected from the outside to a drainage tube bottom center.
- At least two non-rotating radial passages are provided from the outside to the center of the tube bottom in the case of an alternating-field bore, whereby a forced flow from the outside to the tubesheet center is effected in the lanes by the cooling-water bores employed at an angle.
- a forced flow formed transversely to the radial gas flow is formed between the heat exchanger tubes due to the inclined cooling water bores in the tube bottom. This means that a flow into the radial passages is effected from the contact surfaces and from there the contaminants are removed into the center of the tube bottom and out of the system via the outlet.
- the invention also provides in further embodiments that, with four radial no-contact streets, the transverse flow formed between each tube quadrant is formed in half between the heat exchanger tubes to the one adjacent lane and half to the other adjacent lane.
- Another embodiment of the invention consists in a method according to the invention, which is a waste heat boiler with a Berohrungs Scheme outside at a distance used to the boiler wall inner skirt with cooling water openings in the region of the tube plate, in that the inner shirt is equipped in the region of the non-contacting radial streets withoutdeementzuströmö Maschinenen that is reinforced by the center of the Berohrungsquadranten associated cooling water inlet openings directed towards the center forced flow.
- the inflow of the cooling water flowing between inner skirt and outer wall of the vertical waste heat boiler is used to increase the cleaning effect.
- the invention also provides a tube sheet, in particular a vertical waste heat boiler with alternating field within a pipe surrounding inner sleeve at a distance from the boiler shell, which is characterized in that in addition to holes for the riser and downpipes in the tube sheet a variety of Angle to the vertical inclined cooling holes are provided in the pipe bend.
- Embodiments of the tubesheet result from the other subclaims concerning the tubesheet, wherein it can be provided that the tubesheet in the center is provided with an outlet for removing deposits or sludges that have been washed away.
- Fig. 3 is a plan view of a tube sheet with an arrangement scheme of horizontal bores and in
- Fig. 4 in the same view as Fig. 3 is a plan view of the tube sheet with indicated flushing flow.
- a generally designated 1 vertical heat boiler of FIG. 1 in addition to the heat exchanger tubes 2 a generally designated 3 tubesheet, fed via horizontal bores 4, 5 cooling holes.
- Fig. 1 is also indicated that at a distance from the boiler outer wall 6, a riser and downpipes 2 surrounding so-called inner skirt 7 is provided, wherein the inner skirt 7 in the region of the tube bottom cooling water inlet openings 8 through which in the shell space between Kesselau spalland and inner skirt 7 down cooling water can enter the inner Bero range.
- FIG. 2 shows a partial cross section through a tube plate 3.
- the tube plate 3 in the center of a drain 9, can be flushed through the impurities.
- the cooling bores 5 acted upon via horizontal bores 4 are inclined according to the invention from the vertical at an angle, which is indicated in FIG. 2.
- the horizontal bores are in each case one half of a quadrant 11 is disposed in a plane parallel to the adjacent lane 10a or 10b manner, depending in half at 90 0 C.
- the one direction of the horizontal bores is denoted by 4a, those of the other direction by 4b.
- the inclined cooling water holes in such a way that the inclination is aligned towards each closest non-corrugated lane 10, each results in transverse flows, represented by small arrows 12 in Fig. 4, wherein the currents in the non-annulatory radial streets 10 are indicated with small arrows 13.
- the cooling water inlet openings 8 in the inner shirt 7 can be provided so that they act on the central region of each quadrant. This area is indicated in FIG. 4 by double arrows 14, so that an additional flow results through the inflowing cooling water, which is indicated by arrows 15 in FIG. 4.
- cooling bores surrounding the riser and downpipes can not only be inclined in the pipe bend as described here, but they can also have different inclinations from the inside out, such that a kind of spiral flow results from the outside to the inside. like. more.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006057734.5A DE102006057734B4 (en) | 2006-12-07 | 2006-12-07 | Method and apparatus for the sludging of solids depositing on a tube sheet |
PCT/EP2007/010060 WO2008067908A2 (en) | 2006-12-07 | 2007-11-21 | Method and device for removing solids deposited on the bottom of a pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2087281A2 true EP2087281A2 (en) | 2009-08-12 |
EP2087281B1 EP2087281B1 (en) | 2014-10-01 |
Family
ID=39431266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07819879.3A Active EP2087281B1 (en) | 2006-12-07 | 2007-11-21 | Method and device for removing solids deposited on a tube bottom |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2087281B1 (en) |
JP (1) | JP2010521640A (en) |
KR (1) | KR101385415B1 (en) |
CN (1) | CN101809367B (en) |
DE (1) | DE102006057734B4 (en) |
HK (1) | HK1142944A1 (en) |
WO (1) | WO2008067908A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102305395B (en) * | 2011-07-19 | 2014-05-07 | 贵州电力试验研究院 | Water washing method of concurrent boiler provided with boiler water pump |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB190414833A (en) * | 1904-07-01 | 1905-01-26 | Marcel Deprez | Improvements in Steam Boilers. |
GB170991A (en) * | 1920-08-26 | 1921-11-10 | Henry Broscombe | Improved apparatus for use in washing out locomotive or other boilers |
US3913531A (en) * | 1974-06-20 | 1975-10-21 | Combustion Eng | Sediment blowdown arrangement for a shell and tube vapor generator |
CA994622A (en) * | 1974-08-15 | 1976-08-10 | Foster Wheeler Limited | Heat exchangers |
FR2487043A1 (en) * | 1980-07-18 | 1982-01-22 | Framatome Sa | DEVICE FOR DECOLMAGING AND RECOVERING SLUDGE ON THE TUBULAR PLATE OF A STEAM GENERATOR |
US4566406A (en) * | 1983-07-13 | 1986-01-28 | Westinghouse Electric Corp. | Sludge removing apparatus for a steam generator |
US4715324A (en) * | 1985-11-26 | 1987-12-29 | Apex Technologies, Inc. | Nuclear steam generator sludge lancing method and apparatus |
ES2017781B3 (en) * | 1987-11-11 | 1991-03-01 | Siemens Ag | STEAM PRODUCER |
US4972804A (en) * | 1989-04-25 | 1990-11-27 | Alexander T. Kindling | Method and apparatus for organizing the flow of fluid in a vertical steam generator |
CN2172834Y (en) * | 1993-09-30 | 1994-07-27 | 杭州极致过滤器制造有限公司 | Discharging device for salt-removing system of boiler |
JP2589872Y2 (en) * | 1993-12-31 | 1999-02-03 | 株式会社千石 | Defrosting structure of heat exchanger |
-
2006
- 2006-12-07 DE DE102006057734.5A patent/DE102006057734B4/en not_active Expired - Fee Related
-
2007
- 2007-11-21 CN CN2007800450124A patent/CN101809367B/en not_active Expired - Fee Related
- 2007-11-21 JP JP2009539630A patent/JP2010521640A/en not_active Withdrawn
- 2007-11-21 WO PCT/EP2007/010060 patent/WO2008067908A2/en active Application Filing
- 2007-11-21 KR KR1020097011680A patent/KR101385415B1/en active IP Right Grant
- 2007-11-21 EP EP07819879.3A patent/EP2087281B1/en active Active
-
2010
- 2010-09-28 HK HK10109245.2A patent/HK1142944A1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2008067908A2 * |
Also Published As
Publication number | Publication date |
---|---|
EP2087281B1 (en) | 2014-10-01 |
KR101385415B1 (en) | 2014-04-14 |
DE102006057734A1 (en) | 2008-06-26 |
WO2008067908A3 (en) | 2010-04-29 |
HK1142944A1 (en) | 2010-12-17 |
WO2008067908A2 (en) | 2008-06-12 |
DE102006057734B4 (en) | 2014-09-11 |
JP2010521640A (en) | 2010-06-24 |
CN101809367B (en) | 2012-12-26 |
CN101809367A (en) | 2010-08-18 |
KR20090096447A (en) | 2009-09-10 |
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