CN1130545C - Descaling device for steam generator - Google Patents
Descaling device for steam generator Download PDFInfo
- Publication number
- CN1130545C CN1130545C CN00805617A CN00805617A CN1130545C CN 1130545 C CN1130545 C CN 1130545C CN 00805617 A CN00805617 A CN 00805617A CN 00805617 A CN00805617 A CN 00805617A CN 1130545 C CN1130545 C CN 1130545C
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- China
- Prior art keywords
- incrustation scale
- cleaning head
- spray gun
- main part
- tube
- 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 - Lifetime
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
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- 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
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/47—Applications, arrangements, or dispositions of alarm or automatic safety devices responsive to abnormal temperature, e.g. actuated by fusible plugs
- F22B37/475—Safety devices with fusible plugs
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- 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
- F22B37/483—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers specially adapted for nuclear steam generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
- F28G1/166—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from external surfaces of heat exchange conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention discloses a scale removing device which is used for removing scale attached to the inner sides of shell and tube heat exchanger type steam generators. The scale removing device comprises a fixed high pressure water flexible pipe (91), a flexible spraying gun (58) which can move correspondingly to a pipe plate, a pipe supporting plate, a heat transfer pipe, and a cleaning head (60) which is installed on the top of the flexible spraying gun. Spraying nozzle holes (99a, 99b) for generating gas cavities, which are communicated with the fixed high pressure water flexible pipe, are fixed at the inner side of the cleaning head. Gas bubbles are generated during cleaning. Impact pressure generated when the gas bubbles are broken is propagated to remove scale within a wide range.
Description
Technical field
The present invention relates to a kind of for example being used to remove on the tube sheet of heat exchanger and the residue in its tube bank or the device of incrustation scale, this heat exchanger is all to be used in steam generator in the nuclear power station etc. in this way.
Background technology
In order to understand the present invention, must be described the steam generator that is used in nuclear power station etc.Thereby, with reference to Figure 10 steam generator is briefly described.
In Figure 10, the steam of Reference numeral 1 sign steam generator produces part.Steam produces the main part 2 that part 1 has substantial cylindrical, and each inspecting hole (hand hole) or peep hole (in them only one with Reference numeral 17 signs) are symmetrically toward each other within it.In the bottom of main part 2, be furnished with tube sheet 3, this tube sheet 3 has been determined hydroecium 4 with the bottom 2a of main part 2.On this tube sheet 3, arranged a large amount of heat-transfer tubes that is generally U-shaped 5, to be communicated with hydroecium 4.In addition, a plurality of tube support plate 6a, 6b ..., 6f is horizontal, with cross described a large amount of heat-transfer tube 5 and cross-brace they.Each heat-transfer tube 5 by be formed on tube support plate 6a, 6b ..., in the 6f and the irregularly-shaped hole that is commonly referred to BEC (the egg basket of opening (Broached Egg Crate)) hole vertically extend.In Figure 10, the more schematically illustrated BEC hole that is formed among the tube support plate 6a, and with Reference numeral 7 signs.
Space in hydroecium 4 is divided into hot branch road (leg) part 4a and cold branch road part 4b by dividing plate 8.One end of each U-shaped heat-transfer tube 5 is communicated with hot branch road part 4a, and its other end is communicated with cold branch road part 4b.Thereby tube sheet 3 also has a plurality of holes that schematically identified and act as the end that holds each heat-transfer tube by Reference numeral 3a.
In addition, in Figure 10, Reference numeral 9 signs can make the operator enter the manhole (manhole) of hydroecium 4, the cooling agent that Reference numeral 10 signs are communicated with hot branch road part 4a enters nozzle, the cooling agent discharge nozzle that Reference numeral 11 signs are communicated with cold branch road part 4b, and Reference numeral 12 signs are used to hang the gudgeon of steam generator.Though not shown, steam (vapor) outlet is formed on the top of steam generator.In addition, on steam produces part 1, be provided with the water supply nozzle (not shown) that is used for supply water is introduced main part.
For example, under the steam generator situation of nuclear power station, the cooling agent of supplying with from nuclear reactor with high temperature and high pressure enters the hot branch road part 4a that nozzle 10 enters hydroecium 4 by cooling agent, and flows through heat-transfer tube 5 to arrive cold branch road part 4b before it turns back to nuclear reactor by means of cooling agent discharge nozzle 11.Supply water from the water supply nozzle is provided in the main part 2, to fill the periphery of heat-transfer tube 5.The cooling agent that this supply water is flow through the high temp/high pressure of heat-transfer tube 5 heats and becomes steam, and steam is from the steam (vapor) outlet discharge and supply to the steam turbine (not shown) that is used to generate electricity.
Be converted into the result of steam as supply water, the impurity that is called as incrustation scale is easy to be attached to the end face of tube sheet 3, especially, be easy to be attached near the summit portion of the tube sheet 3 hole 3a in it is inserted in the end of heat-transfer tube 5 and embed on the periphery surface of the heat-transfer tube bottom in the tube sheet 3 (in this manual, these zones will be called as " being the zone at center with the tube sheet ").In addition, incrustation scale be easy to be attached on the upper and lower surface of each tube support plate, near the direct zone (in this manual, these zones will be called as " being the part at center with the tube support plate ") of part under BEC hole 7.If ignore, these incrustation scales will cause the corrosion of heat-transfer tube etc.Thereby it must be removed periodically.
In this respect, but the steam generator of various industrial circle widespread adoption produced along with its use heat exchanger tube 5, tube sheet 3, pipe support pull 6a, 6b ..., 6f etc. goes up the impurity that is called as incrustation scale that produces.For the performance of keeping steam generator and prevent because the problems such as corrosion that incrustation scale brings must be removed these incrustation scales.
For this purpose, various incrustation scale removal devices have been developed and have proposed.Be used under the steam generator situation of nuclear power station, aspect protecting the health, must taking measures so that the operator can not be exposed in the dose of radiation above predeterminated level.In addition, although steam generator sizable device that is size, a large amount of heat-transfer tubes is very closely assembled.In addition, each heat-transfer tube has the so little diameter of about 20mm, and the wall relative thin.Thereby if heavier impact is applied thereto, heat-transfer tube is easy to damage.In addition, in steam generator, be provided with a plurality of tube support plates, and the weak point of comparing with the height of whole steam generator of the distance between the adjacent tubes gripper shoe.When development incrustation scale removal device, must take in these conditions.
As mentioned above, steam generator only has a tube sheet, and it has a plurality of tube support plates.Thereby, be the zone at center in order to clean with the tube support plate, (for example, the thin and narrow groove 13 that forms in tube support plate 6a rises and descends the delivery chute that the cleaning head of incrustation scale removal device must be by forming in tube support plate as shown in figure 10).In this regard, being used to clean with the tube sheet is that part of incrustation scale removal device in center is the development respectively of that part of incrustation scale removal device in center with being used to clean with the tube support plate.
Figure 11 illustrates that to be used to clean with the tube sheet be that part of typical incrustation scale removal device at center, as disclosed in Japanese publication patent disclosure 4-503564 number.Totally the incrustation scale removal device by 15 signs passes through inspecting hole or the peep hole 17 laterally inserted directly tube passages 16 on the tube sheet 3 of steam generator.This device comprises and is suitable for the conveyer 20 that moves along supporting guide 18.One flexible spray gun 19 passes this conveyer 20 and arrives the part that will be cleaned between each pipe row.
Figure 12 is shown specifically flexible spray gun 19, and the cleaning head 26 that is arranged on its front end especially is shown.Flexible spray gun 19 comprises four high-pressure hoses 22 that are secured together by the element 25 that is called the pipe racks structure, nitrogen purge pipeline 23 and video probe Connectorized fiber optic cabling 24, and the front end of these elements is connected on the cleaning head 26.What be arranged on cleaning head 26 front ends is a plurality of nozzles 27 that are communicated with high-pressure hose 22.In cleaning process, water 28 sprays (seeing Figure 11) from these nozzles.
Figure 14 illustrates the generic instance that is used to clean with the tube support plate that part of incrustation scale removal device that is the center, as the applicant's Japanese Patent Application Publication 9-026107 number is disclosed.Totally the incrustation scale removal device with 30 signs is provided with insertion mechanism 31 and guide mechanism 32 in Figure 14.Insert mechanism 31 and have drive unit 33 in operator's one side.In addition, it has fixed head 34 at its front end, and this fixed head is fix in position by the work of second actuator cylinder 35.The dash receiver 36 and first actuator cylinder 37 are arranged between operator's side and the front end, thereby the direction of guide mechanism 32 upwards changes 90 degree.Guide mechanism 32 is divided into a large amount of banded fixed heads 38, and therefore, this mechanism can move with curve, and high-pressure hose and cable 29 can be installed on the back side of guide mechanism 32.Cleaning part main body 40 is arranged on the front end of guide mechanism 32, and can rotate 180 degree at the cleaning head 41 of this setting.
Though not shown, this cleaning head 41 also has a plurality of nozzles, water from these nozzle ejection to the part that will be cleaned.By the expansion and the contraction of guide mechanism 32, the incrustation scale removal device passes the delivery chute 13 of tube support plate, to remove the incrustation scale in the zone that with a plurality of tube support plates is the center.
About the removal of incrustation scale, except adhering to the technology of incrustation scale, also developed purpose and be the technology that prevents that incrustation scale from adhering to by removing from the water jet of spray gun.Thereby in recent steam generator, comparing in incrustation scale adhering range and the traditional steam generator is less.In addition, adhere to thickness little more.On the other hand, the adhesive force that adheres to incrustation scale is very strong, and is difficult to remove incrustation scale by above-mentioned water injection method.Figure 15 illustrates the example on the heat-transfer tube how incrustation scale to be attached to tube sheet.Be that incrustation scale (hard scale) in traditional steam generator adheres to situation shown in the left-hand side of heat-transfer tube center line, and be that incrustation scale (hard scale) in steam generator in the recent period adheres to situation shown in its right-hand side.
In the prior art, in order to remove the firm incrustation scale that adheres to (being called hard scale), increase the pressure of water jet.This has been proved for the incrustation scale on the water jet path is effective to a certain extent.Yet the incrustation scale for outside the water jet path does not work, and these incrustation scales are still kept.In order to remove this remaining incrustation scale, attempted by providing a plurality of washer jets or change to enlarge the width of water jet path from the direction of the water jet of nozzle.Yet the increase of projected area only causes the damp impacts in the per unit area.Thereby, can not remove remaining incrustation scale on demand.
This explains in detail with reference to Figure 16.Figure 16 A is the perspective view that used cleaning head example is shown.Cleaning head the upper and lower part of its front surface A have eight nozzle A1 to A4 and A5 to A8, and have four nozzle B 1 to B4 (nozzle B 3 and B4 are not shown) in the upper and lower part of its side surface B.This cleaning head is inserted between each heat-transfer tube 5 shown in Figure 16 B, and water jet 28A and 28B draw cleaning head in the direction of arrow simultaneously from each nozzle ejection of the front surface A and the side surface B of cleaning head, thereby cleans.In this case, the zone of the zone that water jet 28A and 28B impacted for being cleaned, and other zones are outside jet path.In Figure 16 B, symbol Y is illustrated in the direction of extending the directions X at place perpendicular to tube passage 16 in the plane.Thereby Reference numeral Y14, Y15 and Y16 represent the 14, the 15 and the 16 heat-transfer tube of tube passage 16.
Figure 16 C is the plane that the jet path of the water jet 28A that ejects shown in Figure 16 B and 28B is shown.In zone, shadow region not lend oneself to worry and anxiety for being cleaned by water jet 28A, and be the zone that can be cleaned by water jet 28B in the relative narrow shadow region of its left-hand side and right-hand side.In plane, as can be seen, on tube sheet 3, there is the zone outside the jet path.Incrustation scale in removal these zones outside jet path is difficult.In Figure 16 D, the short transverse of the regional relatively hot conducting tube 5 that can be cleaned by water jet 28B illustrates with the shadow region.As can be seen from the figure, also there is the zone outside the jet path in the short transverse of relatively hot conducting tube 5.In the prior art, be difficult to remove outside jet path these the zone in incrustation scale.In Figure 16 D, the Reference numeral of giving the line that extends from the shadow region is illustrated in the nozzle quantity in the side surface B.
So, the purpose of this invention is to provide a kind of incrustation scale removal device, it might solve the following problem in existing incrustation scale removal device, or it can satisfy the following demand to existing incrustation scale removal device:
(1) in order to remove remaining hard scale, the cleaning liquid spray regime need cover whole tube sheet surface and heat-transfer tube sidewall up to high or higher that part of (being included in the zone outside the jet path the existing incrustation scale removal device) of 10mm for recording from tube sheet.
(2) jet is partly assessed as the local strengthening of benchmark by utilizing the influence of material impact, and therefore, for cleaning performance on relative broad range can be fine, any part should be in not cleaning the local higher spray regime of energy.Otherwise cleaning condition should be looser.
(3) effective cleaning diameter of water in air jet is less, therefore, is difficult to enlarge clean range with the washer jet that is incorporated in the spray gun.
Summary of the invention
To achieve these goals, a kind of incrustation scale removal device that is used for the steam generator of following type is provided in first aspect present invention, that is, this steam generator comprises: main part, horizontally disposed in main part and cross tube sheet and a plurality of gripper shoe of main part; Stretch out and terminate in tube sheet from tube sheet, and pass tube support plate and in main part, determine a plurality of heat-transfer tubes of tube passage in row's shape mode; And the inspecting hole that is formed on position on the tube sheet, it is that part of of center that the incrustation scale removal device inserts in order to clean with the tube sheet by this inspecting hole, the incrustation scale removal device comprises: the fixedly high-pressure water hose and the flexible spray gun that can move relative to tube sheet and heat-transfer tube, and be installed to cleaning head on the flexible spray gun front end, what wherein be formed on the cleaning head inboard is that the fluid passage that is communicated with high-pressure water hose, the chamber that is communicated with the fluid passage and the air pocket that is communicated with chamber produce nozzle bore.
The incrustation scale removal device preferably also comprise horizontally disposed on tube sheet the suspension guiding device and the spray gun conveying element that is hung by this suspension guiding device and in horizontal movement, be guided by inspecting hole, wherein, flexible spray gun passes the spray gun conveying element and discharges and draw back from the spray gun conveying element, and wherein the leading section of cleaning head forms not the curved surface of interfering with the main part wall surface of definite inspecting hole.
In addition, it is desirable to the spray gun conveying element and have cylinder-shaped body, flexible spray gun moves by this main body, and the leading section of cleaning head is configured to when flexible spray gun is drawn back fully, and it is outstanding from the periphery surface of cylinder-shaped body.As required, might form one or more described air pockets and produce nozzle bore.
To achieve these goals, provide a kind of incrustation scale removal device that is used for steam generator in a second aspect of the present invention, wherein this steam generator comprises: main part; A plurality of horizontally disposed inboard and cross the tube support plate of main part in main part; A plurality ofly pass tube support plate and in main part, determine the heat-transfer tube of tube passage in row's shape mode; A pair ofly be formed on the main part directly position at least one tube support plate and radially relative each other inspecting hole; And being formed on tube support plate corresponding to the delivery chute in the tube passage part, this incrustation scale removal device inserts by inspecting hole, rise and descend by the delivery chute that is formed in the tube support plate, and cleaning is the part at center with the tube support plate.This incrustation scale removal device comprises: fixedly high-pressure water hose and tube support plate and the movable flexible spray gun of heat-transfer tube relatively, and the cleaning head that is installed to flexible spray gun front end, what wherein be formed on the cleaning head inboard is fluid passage that is communicated with high-pressure water hose and the chamber that is communicated with this fluid passage, and the air pocket that is communicated with this chamber produces nozzle bore.
In addition, cleaning head comprises: cleaning head main part, the chamber that forms the fluid passage and be communicated with the fluid passage in this main part; And being releasably attached to nozzle tip on the cleaning head main part, the air pocket nozzle bore is formed in the nozzle tip.Limit as claim 7, a ultrasonic oscillator might be installed on the nozzle tip.
In addition, nozzle tip comprises: form hexahedron that air pocket produces the hole, from the lamellar mounting portion of stretching out except out-of-plane hexahedral two opposite planar with smaller diameter end that air pocket produces the hole and larger diameter end and the ledge of determining the fluid passage that is communicated with the smaller diameter end in air pocket generation hole, wherein, with being recessed to form in the cleaning head main part of the corresponding profile of nozzle tip structure, and nozzle tip can insert in this depression, and is installed on the cleaning head main part by the mounting portion.In addition, ccd video camera can suitably be arranged in the fore-end of cleaning head.
Description of drawings
Fig. 1 be according to of the present invention being used for from tube sheet with steam generator be the perspective view of incrustation scale removal device of that part of removal incrustation scale at center;
Fig. 2 be according to of the present invention being used for from tube support plate with steam generator be the perspective view of incrustation scale removal device of that part of removal incrustation scale at center;
Fig. 3 is the enlarged perspective of the incrustation scale removal device main part of Fig. 2;
Fig. 4 A is the sectional plan view that can be used for the cleaning head of Fig. 1 and the flexible spray gun of Fig. 2 incrustation scale removal device, and Fig. 4 B is its side view;
Fig. 5 is as the plane of the zoomed-in view of Fig. 4 A part, has been shown clearly in nozzle tip especially;
Fig. 6 A, 6B and 6C are the schematic diagrames that the testing arrangement that utilizes cleaning head of the present invention is shown, and Fig. 6 D illustrates the key diagram that surge is propagated when utilizing that cleaning head cleans shown in Fig. 6 C;
Fig. 7 is a kind of improved cutaway view that cleaning head of the present invention is shown;
Fig. 8 is another improved cutaway view that cleaning head of the present invention is shown;
Fig. 9 A is to illustrate to be used in the interior various nozzle assemblies of cleaning head of the present invention or the cutaway view of nozzle tip to 9D;
Figure 10 is partly cut-away's three-dimensional view of traditional steam generator main part, provides this figure and is beneficial to understand the present invention;
Figure 11 is the conventional apparatus perspective view that is used for from being that part of removal incrustation scale at center with the tube sheet;
Figure 12 is the cutaway view that is illustrated in the cleaning head of the flexible spray gun front end that is used for Figure 11 incrustation scale removal device;
Figure 13 is the side view of Figure 12 cleaning head;
Figure 14 is the conventional apparatus perspective view that is used for from being that part of removal incrustation scale at center with the tube support plate;
Figure 15 is that explanation utilizes the traditional water jet to remove the schematic diagram of incrustation scale; And
Figure 16 A is the partial view with in test conventional clean head, and Figure 16 B is the plane that illustrates from the water jet that sprays between heat-transfer tube of the nozzle bore of cleaning head; Figure 16 C illustrates the tubesheet region that can be cleaned by water jet and the plane of jet path exterior domain; And Figure 16 D is the heat-transfer tube zone that can be cleaned by water jet and the stereogram of jet path exterior domain.
The specific embodiment
The preferred embodiment of the present invention is hereinafter described with reference to the accompanying drawings.In the accompanying drawings, with the identical or corresponding element of the element in the above-mentioned example by identical designated.In addition, as from following description as seen, the invention is not restricted to this embodiment, but various improvement all is feasible.
In Fig. 1, shown main part 2 is for to be used to clean with the tube sheet be that part of incrustation scale removal device 50 at center according to of the present invention.Tube sheet 3 has a large amount of hole 3a, and the end of heat-transfer tube 5 is inserted in the described hole and in the water-stop mode and fixed in it.In addition, in main part 2, be formed with a pair of radially relative circular inspecting hole or peep hole 2b (in them only is shown) in the position of close relatively tube sheet 3 upper surfaces, and incrustation scale removal device 50 can insert in the main part by these inspecting holes 2b.In this embodiment, showing for simplicity on tube sheet 3 upper surfaces done intensive zone or the part 3b representative of getting the zone ready and wants the removed incrustation scale that adheres to.
In Fig. 1, horizontally disposed incrustation scale removal device 50 on tube sheet 3 comprises the suspension guiding device 51 under shed that is called single track, and by this hang guiding device 51 hang and support and along tube passage 16 by the cylindrical spray gun conveying element 52 of horizontal guide.Hang guiding device 51 and have rail sections 53, and the part (not shown) that will be guided of spray gun conveying element 52 engages with rail sections 63, and by rail sections 53 horizontal guides.The not shown device that is used for mobile spray gun conveying element 52.
For supported and suspended guiding device 51 and spray gun conveying element 52, an end of single track 51 is connected on the support component 55 of adjustable in length, and the latter rotatably is installed on the tube passage block 54a.And the other end (not shown) of single track 51 is installed on the similar support component (not shown) in main part 2 outsides.54b identifies as Reference numeral, and the tube passage block also is arranged in inspecting hole 2b side.The same with the flow velocity distribution plate 56 that illustrates on single track 51, its function is distributed for improving flow velocity.
Single track 51 in the position of the relative tube sheet 3 of short transverse, with and the position of inspecting hole 2b can the control flexibly by the amount of spin of regulating above-mentioned support component 55 etc. relatively in the horizontal direction.In addition, on each side of single track 51 first halves, vertically be furnished with the support/protective device 57 that is called air bag.This support/protective device 57 for example is made of flexible cover spare, and this cover part is for example formed by rubber.After single track 51 positioned, gas was imported into, thereby expanded the cover part, and this cover spare contacts with pipe group on single track 51 each side, thereby single track 51 is supported with stationary mode, and the pipe group is protected.
In Fig. 1, Reference numeral 59 sign blowdown pipes (blow down pipe).Blowdown pipe 59 is arranged in the steam generator originally, and with water discharge nozzle (not shown) spaced apart, be used for removing the incrustation scale 3b that removes by spray gun from tube sheet.Mobile device, spray gun drive unit, flexible spray gun that is used for the spray gun conveying element etc. can be known structure, and will be not described in detail.
Be used for from the tube sheet be the center that part of removal incrustation scale incrustation scale removal device 50 structure as mentioned above.The present invention also can be applicable to be used for the device from the tube support plate being that part of removal incrustation scale at center.The embodiment of this device schematically describes now with reference to Fig. 2 and 3.
Fig. 2 and 3 illustrates incrustation scale removal device 70 according to another embodiment of the present invention.In this embodiment, comprise that the manipulation device assembly 71 of the device that is used to handle incrustation scale removal device 10 is connected to the outer periphery surface of main part 2.The guide assembly 72 that is connected in the operation on the manipulation device assembly 71 is integrated with in the main part 2.In this embodiment, this guide assembly 72 is placed on first, on the foot tube support plate 6a, and is provided with inspecting hole 2c near guide assembly 72 each end, and this inspecting hole 2c is different with above-mentioned inspecting hole 2b.
Supported by this guide assembly 72 and guiding be motion/connection carriage assembly (motion/jockey) 75, to be used for support rising/lowering means assembly (after this being called " rising/lowering means " simply) 74, so that can move, erect and tilt.In Fig. 2, the setting/inclination of the rising/lowering means 74 of Yan Shening vertically upward is by rigidity hydraulic pressure setting/tilting gearing 77 and by means of realizations such as capstan winches 76.In addition, rising/lowering means 74 comprises pipe guiding device 78 and extendible arm component 80, and spray gun feed arrangement 79 is installed to the front end of extensible arm component 80.The cleaning head 82 that is arranged on flexible spray gun 81 front ends is fed into the precalculated position of Guan Zuzhong by spray gun feed arrangement 79.Cleaning head 82 comprises fluid injection nozzle as described below.By from the pressure of the fluid of its ejection and the impact on incrustation scale, incrustation scale is peeled off and is removed.The removed incrustation scale that drops on the tube support plate is discharged to the main part outside by other devices.
In Fig. 3, spray gun feedway 86 is installed to the front end of extensible arm portion 85.Spray gun feedway 79 comprises that spray gun inserts pipe 87 and the spray gun feed mechanism (not shown) that is connected on the matrix 88, and wherein flexible spray gun 81 passes spray gun and inserts pipe 87.In addition, the spray guns that can rotate 90 degree insert pipe 87 and are provided with clamp mechanism 89, support spray gun and insert pipe 87 after the front end that spray gun inserts pipe 87 is positioned between the pipe row that will be cleaned being used for.
When the above-mentioned incrustation scale removal device 70 that is in half assembled state in the steam generator main part outside is sent in the main part, and utilize the following steps assembling:
1. the operator inserts hand by inspecting hole 2c, and at main part 2 installed inside surveillance cameras 83;
Assembling during guide assembly in order to protect heat-transfer tube 5 not to be damaged, in pipe group passage, heat-transfer tube protector 84 has been installed;
3. the divergence type guide rail 72a (being separated into two parts in the present embodiment) that constitutes guide assembly 72 is introduced in the main part 2 by inspecting hole 2c.At this moment, motion carriage 75a is connected on the guide rail in advance;
4. after this, utilize connected pipe guide mechanism 78, extensible arm component 80, spray gun feed arrangement 79 etc., will rise/lowering means 74 inserts horizontal level by inspecting hole 2c, arrives the deep end of motion carriage 75a;
5. next step connects carriage 75b and is brought in the main part by inspecting hole, and motion carriage 75a and to be connected carriage 75b fixed to one another with formation motion/connection carriage assembly 75;
6. then, hydraulic pressure setting/tilting gearing 77 is installed on rising/lowering means 74, and rising/lowering means 74 remains on as shown in the figure vertical state by means of capstan winch and tooth bar then, thereby, finished the cleaning of polluting part, especially tube support plate downside has been prepared.
In order to clean, the rotatable arm portion 80b of extensible arm component 80 turns to its position perpendicular to upright arm part 80a, and extensible arm portion 85 suitably extends.Then, spray gun feed arrangement 86 work, spray gun inserts pipe 87 and turns to lateral attitude shown in Figure 3 from shown in Figure 2 towards last position, to be inserted between the heat-transfer tube row.As shown in Figure 3, water under high pressure sprays from being inserted into the cleaning head 82 that will be cleaned the position, thereby removes the incrustation scale of this position.
Below, using description to is that part of incrustation scale removal device at center and to be used for be the various embodiment of that part of incrustation scale removal device 70 at center with the tube support plate shown in Fig. 2 and 3 as shown in Figure 1 with the tube sheet.In order to prevent to be repeated in this description, have only the former, that is, being used for the tube sheet is that the cleaning head 60 of that part of incrustation scale removal device 50 at center will be described.Yet, can think the latter's structure, that is, cleaning head 82 is identical with the former substantially.
Figure 4 and 5 illustrate the leading section of spray gun 58 and are installed to cleaning head 60 on it.For spray gun 58, the structure that for example has as shown in Figure 10 is possible.For to its simple description, in this embodiment, it comprises three high-pressure water hoses 91, a nitrogen purge pipeline 92 and a video probe Connectorized fiber optic cabling 93.These flexible pipes etc. are interfixed by whole block 93a, 93b, the 93c of vertical layout.And by suitable fastener 95, thin cleaning head 60 is installed on the mounting end block 94 in the block 93a foremost.
Shown in Figure 4 and 5, cleaning head 60 has the structure depression that is suitable for receiving said nozzle tip 96, and nozzle tip 96 is fixed on the cleaning head 60 reliably by two trip bolts 97 in the 96b of mounting portion, and is communicated with chamber 60b by connected component 96c.Around connected component 96c, be furnished with sealing device, as O shape circle 98, so that nozzle tip 96 can be installed on the cleaning head 60 with fluid tight manner.That form in connected component 96c is the flow channel 99a of roughly the same diameter, within the main part 96a is conical nozzle hole 99b and be formed on.The end of flow channel 99a is communicated with chamber 60b, and its other end is communicated with the smaller diameter end of nozzle bore 99b.The larger diameter end of nozzle bore 99b is exposed to the outside.
When utilizing cleaning head 60 to be used to remove the purpose of incrustation scale, water is poured over above the tube sheet, till whole at least cleaning head 60 immerses in the water, and then water under high pressure is offered high-pressure water hose 91.The water under high pressure that passes high-pressure water hose 91 enters among the chamber 60b of the cleaning head 60 that is submerged, and from here, this water under high pressure passed the flow channel 99a of nozzle tip 96 as water jet before spraying by nozzle bore 99b.When the nozzle bore 99b of structure shown in water jet passes through sprays, be accelerated around the liquid of this water jet, and pressure is reduced to less than steam pressure by the part, and liquid is evaporated and become the bubble of expansion.This phenomenon is called as air pocket.When cavitation bubble is broken, produce very high surge.
Thereby when cavitation bubble acted on the incrustation scale that adheres to firmly, bubble broke producing high surge, this pressure even can peel off hard scale.Air pocket sprays and is characterised in that, it might use the pressure less than water under high pressure pressure to obtain HI high impact pressure in a big way.In addition, bubble is disperseed producing surge on relative broad range, thereby they also arrive the zone that the traditional water jet can not arrive.Thereby, even might suitably clean those zones outside jet path.In addition, because HI high impact pressure obtains on relative broad range, the apparatus structure that is used to handle the spray gun with cleaning head is simplified, thereby, make this system can easily form automatics.
By using the testing arrangement shown in Fig. 6 A and the 6B, carry out incrustation scale removal test with Fig. 6 C cleaning head or the nozzle head that have with the roughly the same nozzle arrangements of cleaning head shown in the Figure 4 and 5.Shown in Fig. 6 D, cavitation bubble is moved (diffusion) to widen the zone that can be cleaned, thereby, by suitable setting such as spray angle, nozzle exit pressure, flow velocity, away from these parameters such as distance and tube sheet case depths, relatively 80% the cavitation surface of being no less than of sample (heat-transfer tube) reaches incrustation scale and removes effective surge, and does not cause any corrosion (injecting time: 60 minutes) that surpasses the surface roughness permissible value.In addition, under it was applied to hypothesis on the actual steam generator tube sheet, spray angle was set to 58 degree.In this case, realized acting on apart from tube sheet short transverse 10mm or wider going up and effective air pocket on a roughly semi-circumference of circumferencial direction.Thereby can conclude, for comprising if use existing incrustation scale removal device will the jet path exterior domain to be cleaned the zone, this cleaning head is effective.
The present invention is not limited to above-mentioned preferred embodiment, and various modification all is possible.For example, as shown in Figure 7, might adopt cleaning head 100 with two air pocket nozzle tips 101.In Fig. 7, the chamber 102 that is communicated with nozzle tip is formed in the cleaning head 100.Water under high pressure is provided to nozzle tip 101 to produce above-mentioned air pocket by this chamber 102.Reference numeral 104 identification image guiding devices, it for example is included in the optical fiber that the cleaning head front end is connected to ccd video camera 105.
In venturi shown in Figure 8 (venturi) type cleaning head 110, be formed throat 111 corresponding to the part of the cylindrical mobile passage 99a of Figure 4 and 5, in throat 111 so that the air pocket shown in the bubble 112 produces.Thereby this cleaning head 110 not only can be used in the water, and can be used in the air.In addition, in this cleaning head 110, leading edge is not a chamfer bevel simply, but forms sweep 113.
As seeing easily among Fig. 1, therefore spray gun 58 can move along the cylinder-shaped body 52a of spray gun conveying element 52, shown in white arrow,, when it is regained fully, be positioned at the cleaning head of its front end on the inboard of end cladding element 52b of cylinder-shaped body.In this state, incrustation scale removal device 50 is brought into main part by inspecting hole 2b and takes out from main part.Thereby, when the bight of cleaning head 110 forms as shown in Figure 8 sweep 113, when this device be brought into main part and when main part is taken out it can with inspecting hole 2b interference, thereby aspect operating efficiency, be improved.Thereby sweep 113 is suitable for the neighboring structure of the end cladding element 52b of cylinder-shaped body 52a most, as shown in Figure 1.
Below, to 9D, can be applied to incrustation scale removal device of the present invention to produce the various cleaning heads or the nozzle tip of air pocket with reference to Fig. 9 A with describing.Cleaning head 120 shown in Fig. 9 A comprises first element 122 with the conical flow passage 123 that is communicated with high-pressure water hose 121, second element 124 with the cylindrical mobile passage 125 that is communicated with flow channel 123, and the three element 126 with the conical flow passage 127 that is communicated with flow channel 125.Removably be fitted on the three element 126 is to comprise the conical flow passage 129a that is communicated with flow channel 127 and the nozzle tip 129 of cylindrical mobile passage 129b.In addition, be arranged in being cylindrical elements or selling 128 in the conical flow passage 127, its front end is charged in the cylindrical mobile passage 125.In this cleaning head 120, water under high pressure enters conical flow passage 123 from high-pressure hose 121, and is injected in the cylindrical mobile passage 125 to produce air pocket around pin 128.In this cleaning head 120, nozzle tip 129 grades also are arranged on flow channel 125 fronts, thereby if this cleaning head 120 is used in airborne words, it also might produce air pocket.
Fig. 9 B and 9C are depicted as other nozzle tips 130 and 135 of pinhole type.Be provided with tapered conical shaped flow channel 132 at cylindrical mobile passage or chamber 131 fronts, and be formed with short relatively conical flow channel 133 at the front end of conical flow channel 132.Suppose by reducing the length of this flow channel 133, impel in the water under high pressure that flows from left to right in the drawings to produce air pocket.Nozzle tip 130 is different with 135 external structure.
Fig. 9 D illustrates horn shape types of nozzles tip 140.Water under high pressure is introduced horn shape flow channel 141 from the right side of nozzle tip 140, and passes through conical chamber or the flow channel 142 mobile holes that produce before it leaves conical flow channel 143.In this embodiment, the generation in hole is promoted by suitable ultrasonic oscillator 144 is installed on the cylindrical mobile passage 142.
Except above preferred embodiment of the present invention and improvement thereof, it is possible below revising:
(1) when requiring to encourage the hole, an acoustic wave oscillator that only uses in the improvement shown in Fig. 9 D can be arranged on the upstream side (position that the hole does not also produce) of nozzle.
(2) although used one or two nozzle tip in the above-described embodiments, also might increase the quantity of nozzle tip.In addition, when being installed to a plurality of nozzle tips on the same cleaning head, the combination at different types of nozzles tip is feasible.
(3) ccd video camera and image guided device also can be arranged in the cleaning head among the embodiment that does not adopt them.
Industrial applicability
As mentioned above, a kind ofly go for the incrustation scale such as the steam generator of Types Below according to the invention provides Removal apparatus, this steam generator comprises: main part; Horizontally disposed in main part and cross main body Tube sheet and a plurality of tube support plate of part; Stretch out and terminate in tube sheet from tube sheet, and pass in row's shape mode Tube support plate is in order to determine a plurality of heat-transfer tubes of tube passage in main part; And be formed on tube sheet it The inspecting hole of upper position, the incrustation scale removal device can insert to clean centered by tube sheet that by this inspecting hole Part, this incrustation scale removal device comprises: fixedly high-pressure water hose and relative tube sheet and heat-transfer tube are removable Flexible spray gun, and the cleaning head that is installed to flexible spray gun front end wherein, is formed on the cleaning head inboard Be the fluid passage that is communicated with high-pressure water hose, the chamber that is communicated with the fluid passage and connect with chamber Logical hole produces nozzle bore, thereby, when making water under high pressure flow through flexible spray gun, produce air pocket, and acute Strong surge is propagated at relative broad range from the nozzle bore of cleaning head, and impacts centered by tube sheet That part of in incrustation scale, thereby, might remove easily incrustation scale, otherwise this incrustation scale can adhere to solidly Zone outside jet path. This is particularly advantageous in when this steam generator is used for nuclear power station, and this is Because it helps to protect the operator to avoid being exposed to radiation, and the maintaining heat conducting tube is in shape.
In addition, according to the present invention, this incrustation scale removal device preferably also comprises horizontally disposed hanging on tube sheet Hang guiding device, and by hang that guiding device hangs and move in the horizontal direction by inspecting hole on be guided The spray gun conveying element, wherein, flexible spray gun passes the spray gun conveying element, and releases from the spray gun conveying element Put and draw back, and wherein the leading section of cleaning head forms not main part wall surface phase with definite inspecting hole The curved surface of interfering, thereby, have when the incrustation scale removal device is brought into inspecting hole and takes out from inspecting hole not With the advantage that inspecting hole is interfered, the flexible spray gun that has cleaning head in the incrustation scale withdrawing device is contained in spray gun and passes Send in the element. In addition, when cleaning head insert a plurality of heat-transfer tubes of close arrangement in steam generator it Between the time, the front end of cleaning head forms curved surface and is conducive to this insertion.
In addition, when the spray gun conveying element has when the cylinder-shaped body that flexible spray gun passes is arranged, and when clear The leading section of hair washing is configured to draw back Shi Buhui fully from the periphery table of cylinder-shaped body when flexible spray gun When face is given prominence to, can obtain identical effect. The quantity that air pocket produces nozzle bore can be one or two Individual.
In addition, according to the present invention, provide a kind of incrustation scale removal device for steam generator, this steaming Vapour generator comprises: main part, lateral arrangement are crossed a plurality of of main part in the main part inboard Tube support plate; Pass tube support plate and determine that in main part a plurality of heat of tube passage pass in row's shape mode Conduit; Be formed in the main part directly at least one place, tube support plate top position and each other radially Relative a pair of inspecting hole; And be formed on corresponding to the delivery chute in the tube support plate part of tube passage, should The incrustation scale removal device inserts by inspecting hole, and rise and descend by the delivery chute that is formed in the tube support plate, And the part of cleaning centered by tube support plate, this incrustation scale removal device comprises fixedly high-pressure water hose and phase To tube support plate and heat-transfer tube flexible spray gun movably, and the cleaning that is installed to flexible spray gun front end Head, wherein, what be formed on the cleaning head inboard is the fluid passage that is communicated with high-pressure water hose, logical with fluid The chamber that the road is communicated with and the air pocket that is communicated with chamber produce nozzle bore, thereby, when water under high pressure is guided When flowing through flexible spray gun, produce air pocket, and severe impact pressure from the nozzle bore of cleaning head at relative broad range Upper propagation, and impact incrustation scale in that part of centered by tube sheet, thus might remove easily the jail Admittedly the incrustation scale that adheres to. When this steam generator was used in the nuclear power station, this was especially favourable, is Because it helps to protect the operator to avoid being exposed to radiation and the maintaining heat conducting tube is in shape.
In addition, this cleaning head comprise formation and fluid passage in it and the chamber that is communicated with the fluid passage clearly Hair washing main part and detachably be installed to nozzle tip on the cleaning head main part, this hole nozzle The hole is formed in the nozzle tip, thereby, if the generation corrosion in nozzle tip owing to reuse, Might bring in simply by a new nozzle tip and replace, thereby maintenance cost reduces.
In addition, according to the present invention, ultrasonic oscillator might be installed on the nozzle tip, thereby have May further strengthen cavitation impacts pressure, increase thus and adhere to the removed ratio of incrustation scale.
In addition, nozzle tip comprises: determine that air pocket produces the hexahedron in hole; From the lamellar mounting portion that hexahedral two apparent surfaces outside except the surface with smaller diameter end that air pocket produces the hole and larger diameter end stretch out; And the ledge of determining the flow channel that is communicated with the smaller diameter end in air pocket generation hole, wherein, with being recessed to form in the cleaning head main part of nozzle tip structure correspondingly-shaped, and wherein nozzle tip can insert in the depression and by the mounting portion and be installed on the cleaning head main part, thereby might reduce the size of nozzle tip, make the incrustation scale removal device be suitable for inserting between the heat-transfer tube of close arrangement, as the situation in the steam generator.In addition, by at the cleaning head front end ccd video camera being set, might carry out cleaning operation when observation is cleaned the image of part, wherein this image is presented on the monitor in the steam generator outside.
Claims (10)
1. incrustation scale removal device that is used for the steam generator of following type, this steam generator comprises: main part; Horizontally disposed in main part and cross tube sheet and a plurality of tube support plate of main part; Stretch out and terminate in tube sheet from tube sheet, and pass tube support plate so that in main part, determine a plurality of heat-transfer tubes of tube passage in row's shape mode; And the inspecting hole that is formed on position on the tube sheet, it is that part of of center that the incrustation scale removal device inserts to clean with the tube sheet by this inspecting hole, described incrustation scale removal device comprises: the fixedly high-pressure water hose and the flexible spray gun that can move relative to tube sheet and heat-transfer tube, and be installed to cleaning head on the flexible spray gun front end, what wherein be formed on the cleaning head inboard is that the fluid passage that is communicated with high-pressure water hose, the chamber that is communicated with the fluid passage and the air pocket that is communicated with chamber produce nozzle bore.
2. the incrustation scale removal device that is used for steam generator as claimed in claim 1, it is characterized in that, also comprise horizontally disposed on tube sheet the suspension guiding device and the spray gun conveying element that is hung by this suspension guiding device and in horizontal movement, be guided by inspecting hole, flexible spray gun passes the spray gun conveying element and discharges and draw back from the spray gun conveying element, and wherein the front end of cleaning head forms not curved surface with the main part wall surface interference of definite inspecting hole.
3. the incrustation scale removal device that is used for steam generator as claimed in claim 2, it is characterized in that, the spray gun conveying element has cylinder-shaped body, flexible spray gun moves by this main body, and the leading section of cleaning head is configured to when flexible spray gun is drawn back fully, and it is not outstanding from the periphery surface of cylinder-shaped body.
4. the incrustation scale removal device that is used for steam generator as claimed in claim 1 is characterized in that, forms one or more described air pockets and produces nozzle bore.
5. incrustation scale removal device that is used for steam generator, this steam generator comprises: main part; A plurality of horizontally disposed inboard and cross the tube support plate of main part in main part; A plurality ofly pass tube support plate so that in main part, determine the heat-transfer tube of tube passage in row's shape mode; A pair ofly be formed in the main part directly position at least one tube support plate and radially relative each other inspecting hole; And being formed on tube support plate corresponding to the delivery chute in the tube passage part, this incrustation scale removal device inserts by inspecting hole, rise and descend by the delivery chute that is formed in the tube support plate, and cleaning is that part of of center with the gripper shoe; This incrustation scale removal device comprises: fixedly high-pressure water hose and tube support plate and the movable flexible spray gun of heat-transfer tube relatively, and the cleaning head that is installed to flexible spray gun front end, what wherein be formed on the cleaning head inboard is that the fluid passage that is communicated with high-pressure water hose, the chamber that is communicated with the fluid passage and the air pocket that is communicated with this chamber produce nozzle bore.
6. as claim 1, the 4 or 5 described incrustation scale removal devices that are used for steam generator, it is characterized in that cleaning head comprises: cleaning head main part, the chamber that in this main part, forms the fluid passage and be communicated with the fluid passage; And being releasably attached to nozzle tip on the cleaning head main part, air pocket produces nozzle bore and is formed in the described nozzle tip.
7. the incrustation scale removal device that is used for steam generator as claimed in claim 6 is characterized in that ultrasonic oscillator is installed on the nozzle tip.
8. the incrustation scale removal device that is used for steam generator as claimed in claim 6, it is characterized in that, nozzle tip comprises: determine that air pocket produces the hexahedron in hole, from the lamellar mounting portion of stretching out except out-of-plane hexahedral two opposite planar with smaller diameter end that air pocket produces the hole and larger diameter end, and the ledge of determining the fluid passage that is communicated with the smaller diameter end in air pocket generation hole, with being recessed to form in the cleaning head main part of the corresponding profile of nozzle tip structure, and wherein nozzle tip can insert in the described depression, and is installed on the cleaning head main part by the mounting portion.
9. as claim 1 or the 5 described incrustation scale removal devices that are used for steam generator, it is characterized in that ccd video camera is arranged on the leading section of cleaning head.
10. a utilization such as claim 1 or the 5 described incrustation scale removal methods that are used for the incrustation scale removal device of steam generator, wherein said incrustation scale removal device comprises: the fixedly high-pressure water hose and the flexible spray gun that can move relative to tube sheet and heat-transfer tube, and be installed to cleaning head on the flexible spray gun front end, what wherein be formed on the cleaning head inboard is that the fluid passage that is communicated with high-pressure water hose, the chamber that is communicated with the fluid passage and the air pocket that is communicated with chamber produce nozzle bore
The water jet directive object that will be cleaned wherein, this object immerses in the water to quicken the liquid around water jet, thereby the local pressure that produces is not higher than steam pressure, produces bubble causing air pocket because liquid evaporates thus, thereby has cleaned the object that will be cleaned.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2000/000593 WO2001057462A1 (en) | 1998-08-06 | 2000-02-03 | Descaling device for steam generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1345410A CN1345410A (en) | 2002-04-17 |
| CN1130545C true CN1130545C (en) | 2003-12-10 |
Family
ID=11735654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00805617A Expired - Lifetime CN1130545C (en) | 2000-02-03 | 2000-02-03 | Descaling device for steam generator |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1170567B1 (en) |
| KR (1) | KR100446826B1 (en) |
| CN (1) | CN1130545C (en) |
| CA (1) | CA2369481C (en) |
| DE (1) | DE60042400D1 (en) |
| WO (1) | WO2001057462A1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100565534B1 (en) | 2004-11-04 | 2006-03-30 | 엘지전자 주식회사 | Descale device for steam oven |
| US8459582B2 (en) * | 2007-09-03 | 2013-06-11 | National University Corporation Okayama University | Surface treating method and device thereof |
| US10099264B2 (en) | 2008-02-11 | 2018-10-16 | Ecolab Usa Inc. | Bubble enhanced cleaning method and chemistry |
| CN102265111B (en) * | 2009-03-16 | 2013-12-25 | 管科技国际有限公司 | Spray lance for cleaning shell side of heat exchanger core |
| GB2489909A (en) | 2011-03-28 | 2012-10-17 | Tube Tech Int Ltd | Apparatus suitable for cleaning an exterior of tubes of a heat exchanger |
| CN102364292B (en) * | 2011-11-01 | 2013-01-02 | 中国矿业大学 | High-pressure dirt flushing multi-tube pass shell-and-tube heat exchange equipment and high-pressure dirt flushing method |
| CN102401609B (en) * | 2011-11-17 | 2013-03-06 | 姬鄂豫 | Online cleaning device for heat exchange tube of condenser |
| US9206380B2 (en) | 2013-03-14 | 2015-12-08 | Ecolab Usa Inc. | Method of generating carbonate in situ in a use solution and of buffered alkaline cleaning under an enriched CO2 atmosphere |
| CN104180711A (en) * | 2013-05-22 | 2014-12-03 | 天津市通洁高压泵制造有限公司 | Evaporator automatic cleaning system |
| CN103353255B (en) * | 2013-06-04 | 2017-05-10 | 安徽华速机器人科技有限公司 | Spray head back locking structure of on-line cleaning robot of condenser |
| CN103615880B (en) * | 2013-11-22 | 2015-04-22 | 广东美味鲜调味食品有限公司 | Method for maintaining and repairing sauce residue drying machine |
| CN104266539B (en) * | 2014-10-11 | 2016-04-20 | 哈电集团（秦皇岛）重型装备有限公司 | The high-efficiency cleaning device of pore and clean method on a kind of steam generator tube sheet |
| CN104595882B (en) * | 2015-01-19 | 2016-06-08 | 浙江徐氏厨房设备有限公司 | Gas steam generator apparatus for eliminating sludge |
| RU2692748C2 (en) * | 2015-06-10 | 2019-06-27 | Фраматом Гмбх | Appliance and method for cleaning heat exchanger inner zone |
| DE102015118615B3 (en) * | 2015-10-30 | 2016-09-01 | Areva Gmbh | Flexible lance for working or inspecting a tube plate of a steam generator |
| CN107175228A (en) * | 2016-03-10 | 2017-09-19 | 核动力运行研究所 | Steam generator secondary side the first supporting plate lower surface hydrodynamic cleaning guider |
| CN110296632A (en) * | 2018-03-21 | 2019-10-01 | 国核电站运行服务技术有限公司 | The cleaning device of steam generator |
| CN110822406B (en) * | 2019-11-20 | 2021-05-14 | 苏州热工研究院有限公司 | Full-tube-bundle leaching system and leaching method for steam generator |
| EP4067739A1 (en) | 2021-03-29 | 2022-10-05 | Conservator Tyche Beheer B.V. | Method of and device for cleaning and/or inspecting a furnace or boiler |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2005147B (en) * | 1977-09-15 | 1982-03-10 | Rolls Royce | Fluid operated nozzles for generation of vibrations in liquid |
| DE8437870U1 (en) * | 1984-12-22 | 1986-02-13 | Wache Oberflächentechnik GmbH & Co KG, 2000 Norderstedt | Device for washing preferably metallic workpieces |
| US5036871A (en) * | 1989-02-22 | 1991-08-06 | Electric Power Research Institute, Inc. | Flexible lance and drive system |
| JPH0552592U (en) * | 1991-12-05 | 1993-07-13 | 三菱重工業株式会社 | Cleaning device for heat exchanger |
| JPH0655084U (en) * | 1992-12-21 | 1994-07-26 | 三菱重工業株式会社 | Automatic heat exchanger pipe base cleaning device |
| JP2930538B2 (en) * | 1995-07-12 | 1999-08-03 | 三菱重工業株式会社 | Steam generator cleaning equipment |
| US5764717A (en) * | 1995-08-29 | 1998-06-09 | Westinghouse Electric Corporation | Chemical cleaning method for the removal of scale sludge and other deposits from nuclear steam generators |
| JPH0989498A (en) * | 1995-09-26 | 1997-04-04 | Babcock Hitachi Kk | Device and method for removing oxide scale |
-
2000
- 2000-02-03 DE DE60042400T patent/DE60042400D1/en not_active Expired - Lifetime
- 2000-02-03 KR KR10-2001-7012557A patent/KR100446826B1/en active IP Right Grant
- 2000-02-03 WO PCT/JP2000/000593 patent/WO2001057462A1/en active IP Right Grant
- 2000-02-03 CA CA002369481A patent/CA2369481C/en not_active Expired - Lifetime
- 2000-02-03 EP EP00902850A patent/EP1170567B1/en not_active Expired - Lifetime
- 2000-02-03 CN CN00805617A patent/CN1130545C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1170567B1 (en) | 2009-06-17 |
| KR20010111290A (en) | 2001-12-17 |
| EP1170567A4 (en) | 2004-04-28 |
| CA2369481C (en) | 2006-03-28 |
| DE60042400D1 (en) | 2009-07-30 |
| WO2001057462A1 (en) | 2001-08-09 |
| CA2369481A1 (en) | 2001-08-09 |
| KR100446826B1 (en) | 2004-09-04 |
| EP1170567A1 (en) | 2002-01-09 |
| CN1345410A (en) | 2002-04-17 |
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Granted publication date: 20031210 |