CN102554550A - Method for rapidly repairing defects of finned tube module of waste heat boiler - Google Patents
Method for rapidly repairing defects of finned tube module of waste heat boiler Download PDFInfo
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- CN102554550A CN102554550A CN2010105971367A CN201010597136A CN102554550A CN 102554550 A CN102554550 A CN 102554550A CN 2010105971367 A CN2010105971367 A CN 2010105971367A CN 201010597136 A CN201010597136 A CN 201010597136A CN 102554550 A CN102554550 A CN 102554550A
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Abstract
The invention relates to a method for rapidly repairing defects of a finned tube module of a waste heat boiler, which includes the steps: 1 judging the position of a defective tube of the finned tube module, judging a system or module with a leakage point and determining a peripheral duct needing to be cut by means of visual examination outside a furnace and operational data analysis; 2 stripping fins of a heated tube and finding the specific position of the defective tube; 3 cutting off the section of the defective tube according to the position of the module with the defective tube; 4 replacing the section of the defective tube in an inserted manner, performing argon-arc backing weld by an internal wire filling method, and controlling the weld quality of a backing layer by a welder through end clearance; and 5 inspecting quality after welding and thoroughly removing slag and splash after welding until passing inspection. The method can be used for rapidly stripping the fins without hoisting the module, avoiding damage to a body of the finned tube, more rapidly cutting the section of the defective tube and realizing argon filling tightness in the finned tube module of the waste heat boiler.
Description
Technical field
The present invention relates to a kind of method of quick reparation waste heat boiler extended surface tube module defective, belong to power generation industries and auxiliary device technical field field.
Background technology
At present, along with gas east, China west is sent and the overseas LNG of introduction, the gas-vapo(u)r Combined Cycle Unit begins a large amount of operations of putting into production.Simultaneously, because the relevant technical policy of country, the waste heat boiler overwhelming majority that is equipped with Combined Cycle Unit is to produce after domestic manufacturer's introduction of foreign technology.According to external relevant theory, it is disposable apparatus that extended surface tube receives thermal modules, generally can not leak in the lifetime, does not therefore have the recovery technique and the record of extended surface tube heating surface defective abroad.Yet according to waste heat boiler this ruuning situation in several years at home, the incident that the extended surface tube heating surface takes place to leak happens occasionally.According to these several years domestic power plant defective taking place and analyze, mainly is that following some reason causes the extended surface tube heating surface to leak:
1) large-scale residual heat boiler with the configuration of gas-vapo(u)r Combined Cycle Unit is the domestic design of introduction of foreign technology first and makes; Digestion and innovation ability are not enough; Certainly exist many problems, as: do not take into full account combustion machine exhaust flow velocity big and the vibration and the friction problem of several modules (particularly module 1) before causing.Be prone to cause that heating surface pipe damages and leak; Unclear with combustion machine operation characteristic to waste heat boiler, design too theorizes, and causes the working media assignment of traffic inhomogeneous, is prone to cause overtemperature tube burst; Introduce totally by foreign standard, variant with the domestic current standard, can't carry out sufficient preventive inspection, be prone to the leakage accident etc. that meets accident.
2) external unit is this load operation of tape base mode; China then is long-term two-shift operation; Be world initiative, start, shutdown speed is much faster than coal-fired unit with the speed of ascending, descending load that rate temperature change is very big; Test to material and architectural characteristic (like all densely covered helix fin of whole heating surface pipes) is big, and the new problem that temperature alternating stress, fatigue rupture etc. cause will be inevitable.
3) problem of materials: for satisfying the operational factor requirement of waste heat boiler, guarantee boiler life and quality, under the situation that the current material technology can't satisfy at home, China boiler for producing producer all uses external imported material when making waste heat boiler.Yet imported material is because of factors such as the mode of production and the places of production, and material property can occur can't satisfy instructions for use, causes extended surface tube heating surface generation defective.
4) absorption of technology of waste heat boiler manufacturing enterprise welding procedure and quality control aspect is not enough with digestion, causes the extended surface tube module to have the fabrication and installation defective, leaks in the production run.
In the prior art, the waste heat boiler heating surface of boiler proper adopts N/E standard design modular structure, and being divided into is 6 modules, and each module is made up of along row spiral finned tube and import and export collection case vertically arranged, to obtain best heat-transfer effect and minimum flue gas pressure drop.The flue gas that gas turbine is discharged gets into boiler body through inlet flue duct, and horizontal cross is washed away each heating surface module successively, is discharged by main chimney through exhaust pass again.Because the restriction of traffic condition; Each heating surface module of this boiler broad ways is divided into three tube panel modules; Each modular design has designed 8-16 row fin pipe along flue gas flow direction; Pipe all adopts tooth punching helix fin tubular construction, between each module tube and tube (comprising fin) connect closely the not enough 5mm in the gap of fin.Each tube panel all is to be suspended on the crossbeam, and the top of module and bottom collection case have been installed gas baffle, prevent the flue gas short circuit.
This kind structure has been brought very big difficulty with regard to the service work of giving the extended surface tube module, the intensive layout of extended surface tube, and distance is quite little between tube and tube.Because the not enough 5mm in heating surface fin gap, not only instrument can't go deep into, sight line also can be blocked, in case the extended surface tube module is leaked, confirms that the defective pipeline location takes place, carries out pipe cutting, welding and golden to examine work difficulty quite big.Just in case quick-fried leakage occurs at unfavorable position (in the middle of the module), can not execute then there is good plan, can only handle the manpower and materials of (need hang out module), labor according to the method for erection stage, the repair time is very long, reaches two weeks basically.
Summary of the invention
The object of the invention; It is the problem that to repair waste heat boiler extended surface tube module defective in order to solve in the prior art; A kind of method of quick reparation waste heat boiler extended surface tube module defective is provided; Adopt this method to need not to carry out the module lifting, can realize divesting fin fast, and can not cause damage the extended surface tube pipe shaft; The defective pipeline section can be cut sooner, and the sealing of argon filling can be in waste heat boiler extended surface tube module, realized.
The object of the invention can reach through following measure:
A kind of method of quick reparation waste heat boiler extended surface tube module defective, its characteristics are may further comprise the steps:
1) tentatively judges the position of the defective pipe of extended surface tube module: the first step: through outer visual examination of stove and Operational Data Analysis, judge system or module under the leak source earlier, confirm the pipeline that the periphery should be cut;
2) divest the heat pipe fin, find out the particular location of defective pipe: at first,, need not to switch to the fin root, only need the pipe radial cuts to get final product to about 4/5 degree of depth of fin with the parallel heat pipe radial cuts of cutting machine fin; Axially knock fin with lacking drill rod along caliber, fin gets loose afterwards to pull up with hand vice and presss from both sides out; After divesting fin and forming about 4cm space, down knock fin with drill rod along tube wall, fin can get loose by nature, takes out the fin that gets loose with hand vice again, finds out the defective pipe after having cleared up fin;
The method that divests the heat pipe fin need be definite apart from coming according to position, the pipe way of module.Tradition is to adopt gas cutting and abrasive wheel cutting machine to peel off.But through test, adopt the method for gas cutting, be difficult to not damage the pipe mother metal and cut clean all fins, or pipe and fin are heated, cause melt to stick together, take out more difficult because of flame temperature is too high; Because thoroughly Ex-all of root causes the fin residual fraction many more, the gap is more little, then again can't cut until the 3rd row, thereby can't confirm leak source.If cut with conventional abrasive wheel cutting machine, because the emery wheel external diameter surpasses 150mm usually, for most modules, greater than the fin height sum of two pipes, so fragile mother metal.Simultaneously, because grinding wheel broken (fin too many, unbalance stress) easy to break, cutting the lining, to arrange time space limited, even use reciprocating saw, the problems referred to above can occur equally, therefore, need study more suitably instrument and method.
By analysis; The processing technology of the used tooth punching spiral finned tube of waste heat boiler boiler is on the seamless steel pipe outer surface, to twine the tooth punching steel band and keep vertical by certain pitch; Kelvin effect and electrocaloric effect by high frequency electric; The contact-making surface of local heat steel pipe and steel band is realized the plasticity welding of contact-making surface.Be the waste heat boiler extended surface tube and directly be welded on the heat pipe unlike the conventional boiler extended surface tube is such.Is not very fastening through experiment proof fin with being connected of heat pipe.
Through test of many times, we adopt step 2 now) in method can divest the fin of extended surface tube rapidly.The benefit of doing like this is: one, speed is fast, practices thrift for 50% time than conventional method; Two, divest effectively, fin is to peel off fully, the fin of heat pipe face noresidue, and it is many more the sub-fin residual fraction of rear of tube can not occur arriving more, and the gap is more little, and the situation that causes because of the space is too small in the middle of the module again cutting fin takes place; Three, because the fin cutting is radially to carry out along pipe, can not take place because heat pipe blocks the situation that causes cutting machine to stretch into; Can not hurt heat pipe when four, peeling off fin, no matter cut or knock, all on fin, carry out and pipe contactless, can be as conventional way the easy heat pipe that hurts, cause new hidden danger and defective to take place.
3) cut off the defective pipeline section: according to the module position at defective pipe place, use reciprocating saw, oppositely cut off by the form of " 1-1-3-3-5-5 "; The form of said " 1-1-3-3-5-5 " is meant: if the defective pipe is second row; Then outermost row only need cut a heat pipe; Just can carry out the pipe maintenance work, if pipe is arranged the 3rd, then outermost need cut 3 pipes just can have enough spaces to carry out maintenance work; Because space problem, outermost layer also only needs 5 pipes of cutting the most for a long time, and the welder just can health stretches into and carries out maintenance work;
4) plug-in type is changed the defective pipeline section: a) adopt interior silk filling method to carry out argon arc backing weld and connect, through the counterpart gap, the welder can control the prime coat weldquality; B) people welding is taked in filling and capping layer welding, and a people cooperates the way with little sem observation; Control capping layer weldquality; C) excision defective fin pipeline section changes two weld bonds of a new pipe welding, adopts novel argon filling device solves argon filling sealing problem;
5) quality inspection after welding is accomplished: postwelding is thoroughly removed slag and splash, with the hand magnifier inspection, crackle, pore, this type of weld defect of slag inclusion can not be arranged; Otherwise adopt the electric angle grinder polishing, welding again behind the removing weld defect is till passed examination.
The object of the invention can also reach through following measure:
One embodiment of the present invention are: in step 1); When the first step can't be judged extended surface tube module defective locations, judge that be described below: the speed of utilizing each system pressure or temperature to descend is different in conjunction with second step; Open manhole and observe, judge affiliated pipe of leak source and general height; In case of necessity, the measure that properly protects comprises that high dish purges, and quickens the burner hearth cooling; Observe back (each 1h is generally 2 times) for several times, positive opening flue gas plate washer keeps the draft to burner hearth, opens corresponding manhole door, and is visual inwards, listen attentively to; The coordinated operation personnel note pressurize consciously or build the pressure, and wherein, centering is pressed the superheated steam system, manual intervention operated valve in the time of also can taking to move, pour in down a chimney steam by auxilliary vapour or high-pressure superheater and cooperate leakage detection;
One embodiment of the present invention are: in step 1); Vapour system maybe to cause pressure release too fast because of various accidents; In the time can't finding the leak source position, then must adopt air testing method, water pressure test method or steam test method to search through the above-mentioned first step and second step.
One embodiment of the present invention are: in step 4), said novel argon filling device has a bend pipe, and bend pipe adopts flat tube, thereby bend pipe can be filled in the very little weld seam; The two ends up and down that on the extended surface tube inwall, are positioned at weld bond are respectively equipped with the obstruction cup of processing with water-soluble paper, and when in pipe during towards argon gas, argon gas can not escaped along pipeline, guarantees completion welding job under argon shield.
The invention has the beneficial effects as follows:
1, realizes the quick reparation of waste heat boiler extended surface tube module defective; Need not to carry out the module lifting.
2, innovation formula extended surface tube fin process for stripping, have the following advantages: one, speed is fast, practices thrift for 50% time than conventional method; Two, divest effectively, fin is to peel off fully, the fin of heat pipe face noresidue, and it is many more the sub-fin residual fraction of rear of tube can not occur arriving more, and the gap is more little, and the situation that causes because of the space is too small in the middle of the module again cutting fin takes place; Three, because the fin cutting is radially to carry out along pipe, can not take place because heat pipe blocks the situation that causes cutting machine to stretch into; Can not hurt heat pipe when four, peeling off fin, no matter cut or knock, all on fin, carry out and pipe contactless, can be as conventional way the easy heat pipe that hurts, cause new hidden danger and defective to take place.
3, be different from traditional cutting mode, cut the defective pipeline section sooner.Conventional pipe cutting method is to adopt gas cutting, this be the most fast, the simplest method, but operating personnel are required height, must be by technical operation senior, that be skilled in technique, in order to avoid damage contiguous pipe; And as far as some material extended surface tube module, tubing is unfavorable for gas cutting more firmly.Also available grinding wheel external diameter cuts less than the minitype cutting machine that caliber adds tube pitch, is carried out by experienced pincers worker, otherwise is prone to cause the damage to adjacent tube; But require cutter special like this, and, then, can't cut to the back side of extended surface tube because grinding wheel is less if the extended surface tube caliber is bigger.Through test relatively, use the reciprocating saw cutting effect better, requisite space is little; Caliber more also can be accomplished cutting; And owing to reciprocating saw can directly cut on extended surface tube, and cutting machine just can come into operation after need the fin of scarfing position being divested, and can practice thrift maintenance time.
4, unique argon filling device, the sealing of realization argon filling in waste heat boiler extended surface tube module.
Description of drawings
Fig. 1 a, Fig. 1 b, Fig. 1 c are that the fin that divests of the specific embodiment of the invention cuts sketch map.
Among the figure: 1 is heat pipe; 2 is fin; 3 is abrasive machine; 4 is drill rod.
Fig. 2 is the structural representation of the novel argon filling device of the specific embodiment of the invention.
Among the figure: 1 is heat pipe; 2 is fin; 5 is weld bond; 6 is the argon filling device; 7 for stopping up cup.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description:
Specific embodiment 1:
The described method that a kind of quick reparation waste heat boiler extended surface tube module defective is arranged of present embodiment is explained in existing maintenance with certain waste heat boiler extended surface tube module (the defective pipe is positioned at the 3rd row), carries out according to the following steps successively:
1) adopts water pressure test method, leak through observation and probably judge the position of extended surface tube module defective, can judge that defective is positioned on the 3rd or the 4th row's extended surface tube, confirms the pipeline that the periphery should be cut.
2) use reciprocating saw, with 3 pipe excisions of first row.
3) use reciprocating saw, pipe of excision second row.The 3rd array of pipes has the water mark, judges that tentatively defective maybe be on this root extended surface tube.
4) Fig. 1 a, Fig. 1 b, Fig. 1 c, with abrasive machine the 3rd row suspect the defective extended surface tube along caliber to cutting, axially knock fin 2 with short drill rod along caliber, fin gets loose afterwards to pull up with hand vice and presss from both sides out.After divesting the about 4cm of fin 2 formation space, down knock fin 2 with drill rod along tube wall, fin 2 can get loose by natures, takes out the fin 2 that gets loose with hand vice again.Find out defective after having cleared up fin.
5) with abrasive machine second row's extended surface tube cut off 2 pipes in pipe next door along caliber to cutting, axially knock fin with short drill rod along caliber, pull up with hand vice after fin gets loose and press from both sides out.After divesting fin and forming about 4cm space, down knock fin with drill rod along tube wall, fin can get loose by nature, takes out the fin that gets loose with hand vice again.Divest about 30CM fin.
6) with reference to Fig. 2 a, Fig. 2 b, Fig. 2 c, from joint edge the rejected region segment of tube is oppositely cut off in the extended surface tube side with reciprocating saw, polish then to the groove dimensional requirement.Simultaneously new pipeline section is also polished to the groove dimensional requirement.
7) the collection case is reprocessed in the about 200mm in zone and is preheated to 150 ℃ with the flame heat method, carries out part back of the body gas shiled by Fig. 4 requirement with argon filling device 6, with new pipeline section and old pipeline section tack welding, counterpart gap 3-4mm.Guarantee the people that stretches of welding wire.
8) select and appoint veteran I class welder through the welding of minute surface imaging weldering method, guaranteeing to adopt less standard to weld first weld seam under the root fusion good premise as far as possible, interlayer temperature is controlled at below 300 ℃.Adopt AWS A5.28, the ER 90S-B9 welding wire of specification for the 2.0nlln that hangs down, electric current 100-130A, two layers have been welded.Every weldering finishes one deck, in time utilizes little mirror to assist and carries out visual examination.
9) after butt joint weld bond 5 is accomplished, remove back of the body gas shiled device.Place soluble paper ring 7 by Fig. 4 requirement.
10) gas shiled of the inspection back of the body all right after, carry out second weld seam assembling and positioning and the welding, welding procedure is the same with first weld seam.
11) finish when the weld seam integral solder, during slow cooling to 100～120 ℃, in time carry out post weld heat treatment, heat treatment heating-up temperature (760 ± 10) ℃, constant temperature 4h.
12) quality inspection after welding is accomplished: postwelding is thoroughly removed slag and splash, with the hand magnifier inspection, crackle, pore, this type of weld defect of slag inclusion can not be arranged; Otherwise adopt the electric angle grinder polishing, welding again behind the removing weld defect is till passed examination.
Specific embodiment 2: the characteristics of this specific embodiment are may further comprise the steps:
1) tentatively judges the position of the defective pipe of extended surface tube module: the first step: through outer visual examination of stove and Operational Data Analysis, judge system or module under the leak source earlier, confirm the pipeline that the periphery should be cut;
2) divest the heat pipe fin, find out the particular location of defective pipe: at first,, need not to switch to the fin root, only need the pipe radial cuts to get final product to about 4/5 degree of depth of fin with the parallel heat pipe radial cuts of cutting machine fin; Axially knock fin with lacking drill rod along caliber, fin gets loose afterwards to pull up with hand vice and presss from both sides out; After divesting fin and forming about 4cm space, down knock fin with drill rod along tube wall, fin can get loose by nature, takes out the fin that gets loose with hand vice again, finds out the defective pipe after having cleared up fin;
The method that divests the heat pipe fin need be definite apart from coming according to position, the pipe way of module.Tradition is to adopt gas cutting and abrasive wheel cutting machine to peel off.But through test, adopt the method for gas cutting, be difficult to not damage the pipe mother metal and cut clean all fins, or pipe and fin are heated, cause melt to stick together, take out more difficult because of flame temperature is too high; Because thoroughly Ex-all of root causes the fin residual fraction many more, the gap is more little, then again can't cut until the 3rd row, thereby can't confirm leak source.If cut with conventional abrasive wheel cutting machine, because the emery wheel external diameter surpasses 150mm usually, for most modules, greater than the fin height sum of two pipes, so fragile mother metal.Simultaneously, because grinding wheel broken (fin too many, unbalance stress) easy to break, cutting the lining, to arrange time space limited, even use reciprocating saw, the problems referred to above can occur equally, therefore, need study more suitably instrument and method.
By analysis; The processing technology of the used tooth punching spiral finned tube of waste heat boiler boiler is on the seamless steel pipe outer surface, to twine the tooth punching steel band and keep vertical by certain pitch; Kelvin effect and electrocaloric effect by high frequency electric; The contact-making surface of local heat steel pipe and steel band is realized the plasticity welding of contact-making surface.Be the waste heat boiler extended surface tube and directly be welded on the heat pipe unlike the conventional boiler extended surface tube is such.Is not very fastening through experiment proof fin with being connected of heat pipe.
Through test of many times, we adopt step 2 now) in method can divest the fin of extended surface tube rapidly.The benefit of doing like this is: one, speed is fast, practices thrift for 50% time than conventional method; Two, divest effectively, fin is to peel off fully, the fin of heat pipe face noresidue, and it is many more the sub-fin residual fraction of rear of tube can not occur arriving more, and the gap is more little, and the situation that causes because of the space is too small in the middle of the module again cutting fin takes place; Three, because the fin cutting is radially to carry out along pipe, can not take place because heat pipe blocks the situation that causes cutting machine to stretch into; Can not hurt heat pipe when four, peeling off fin, no matter cut or knock, all on fin, carry out and pipe contactless, can be as conventional way the easy heat pipe that hurts, cause new hidden danger and defective to take place.
3) cut off the defective pipeline section: according to the module position at defective pipe place, use reciprocating saw, oppositely cut off by the form of " 1-1-3-3-5-5 "; The form of said " 1-1-3-3-5-5 " is meant: if the defective pipe is second row; Then outermost row only need cut a heat pipe; Just can carry out the pipe maintenance work, if pipe is arranged the 3rd, then outermost need cut 3 pipes just can have enough spaces to carry out maintenance work; Because space problem, outermost layer also only needs 5 pipes of cutting the most for a long time, and the welder just can health stretches into and carries out maintenance work;
4) plug-in type is changed the defective pipeline section: a) adopt interior silk filling method to carry out argon arc backing weld and connect, through the counterpart gap, the welder can control the prime coat weldquality; B) people welding is taked in filling and capping layer welding, and a people cooperates the way with little sem observation; Control capping layer weldquality; C) excision defective fin pipeline section changes two weld bonds of a new pipe welding, adopts novel argon filling device solves argon filling sealing problem;
5) quality inspection after welding is accomplished: postwelding is thoroughly removed slag and splash, with the hand magnifier inspection, crackle, pore, this type of weld defect of slag inclusion can not be arranged; Otherwise adopt the electric angle grinder polishing, welding again behind the removing weld defect is till passed examination.
Other specific embodiments:
The characteristics of other embodiment of the present invention are: with reference to specific embodiment 2,
In step 1), when the first step can't be judged extended surface tube module defective locations, judge that be described below: the speed of utilizing each system pressure or temperature to descend is different, opens manhole and observes in conjunction with second step, judge pipe and general height under the leak source; In case of necessity, the measure that properly protects comprises that high dish purges, and quickens the burner hearth cooling; After observing for several times, positive opening flue gas plate washer keeps the draft to burner hearth, opens corresponding manhole door, and is visual inwards, listen attentively to; The coordinated operation personnel, centering is pressed the superheated steam system, manual intervention operated valve when taking to move, pours in down a chimney steam by auxilliary vapour or high-pressure superheater and cooperates leakage detection;
Perhaps in step 1),, in the time can't finding the leak source position, then adopt air testing method, water pressure test method or steam test method to search through the above-mentioned first step and second step if vapour system is too fast because of various accidents cause pressure release;
Perhaps in step 4), said argon filling device has a bend pipe, and bend pipe adopts flat tube, and bend pipe can be filled in the little weld seam; The two ends up and down that on the extended surface tube inwall, are positioned at weld bond are respectively equipped with the obstruction cup of processing with water-soluble paper;
All the other are identical with specific embodiment 2.
The above; Be merely the preferable specific embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technical staff who is familiar with the present technique field is equal to replacement or change according to technical scheme of the present invention and inventive concept thereof in the scope that the present invention discloses, all belong to protection scope of the present invention.
Claims (4)
1. method of repairing fast waste heat boiler extended surface tube module defective is characterized in that may further comprise the steps:
1) tentatively judges the position of the defective pipe of extended surface tube module,, judge system or module under the leak source, confirm the pipeline that the periphery should be cut through outer visual examination of stove and Operational Data Analysis;
2) divest the heat pipe fin, find out the particular location of defective pipe; At first, along heat pipe radial cuts fin, depth of cut is 4/5 degree of depth place along the pipe radial cuts to fin with cutting machine; Axially knock fin with lacking drill rod along caliber, fin gets loose afterwards to pull up with hand vice and presss from both sides out; After divesting fin and forming the 4cm space, down knock fin with drill rod along tube wall, can get loose by nature to fin, the fin that gets loose with the hand vice taking-up is again found out the defective pipe after having cleared up fin;
3) cut off the defective pipeline section,, use reciprocating saw, oppositely cut off by the form of " 1-1-3-3-5-5 " according to the module position at defective pipe place; The form of said " 1-1-3-3-5-5 " is meant: if the defective pipe is second row; Then outermost row only need cut a heat pipe; Just can carry out the pipe maintenance work, if pipe is arranged the 3rd, then outermost need cut 3 pipes just can have enough spaces to carry out maintenance work;
4) plug-in type is changed the defective pipeline section, a) adopts interior silk filling method to carry out argon arc backing weld and connects, and through the counterpart gap, the welder controls the prime coat weldquality; B) people welding is taked in filling and capping layer welding, and a people cooperates the way with little sem observation; Control capping layer weldquality; C) excision defective fin pipeline section changes two weld bonds of a new pipe welding, adopts argon filling device solves argon filling sealing problem;
5) quality inspection after welding is accomplished, postwelding is thoroughly removed slag and splash, with the hand magnifier inspection, in sealing crackle, pore, slag inclusion weld defect can not be arranged; If exist aforementioned disadvantages then to adopt the electric angle grinder polishing, welding again behind the removing weld defect is till passed examination.
2. the method for a kind of quick reparation waste heat boiler extended surface tube module defective according to claim 1; It is characterized in that: in step 1); When the first step can't be judged extended surface tube module defective locations, judge that be described below: the speed of utilizing each system pressure or temperature to descend is different in conjunction with second step; Open manhole and observe, judge affiliated pipe of leak source and general height; In case of necessity, the measure that properly protects comprises that high dish purges, and quickens the burner hearth cooling; After observing for several times, positive opening flue gas plate washer keeps the draft to burner hearth, opens corresponding manhole door, and is visual inwards, listen attentively to; The coordinated operation personnel, centering is pressed the superheated steam system, manual intervention operated valve when taking to move, pours in down a chimney steam by auxilliary vapour or high-pressure superheater and cooperates leakage detection.
3. the method for a kind of quick reparation waste heat boiler extended surface tube module defective according to claim 2; It is characterized in that: in step 1); If vapour system is too fast because of various accidents cause pressure release; In the time can't finding the leak source position, then adopt air testing method, water pressure test method or steam test method to search through the above-mentioned first step and second step.
4. according to the method for claim 1 or 2 or 3 described a kind of quick reparation waste heat boiler extended surface tube module defectives, it is characterized in that: in step 4), said argon filling device has a bend pipe, and bend pipe adopts flat tube, and bend pipe can be filled in the little weld seam; The two ends up and down that on the extended surface tube inwall, are positioned at weld bond are respectively equipped with the obstruction cup of processing with water-soluble paper.
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| CN106180988A (en) * | 2016-08-23 | 2016-12-07 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN106180987A (en) * | 2016-08-23 | 2016-12-07 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN106239029A (en) * | 2016-08-23 | 2016-12-21 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN106514127A (en) * | 2015-09-09 | 2017-03-22 | 上海上电漕泾发电有限公司 | Water-cooling wall pipe replacing process |
| CN110549069A (en) * | 2019-07-15 | 2019-12-10 | 中国南方航空股份有限公司 | Method for repairing damage of anti-icing pipeline of engine air inlet |
| CN114393282A (en) * | 2022-01-19 | 2022-04-26 | 云南建投第二安装工程有限公司 | Treatment method for welding operation of boiler shed pipe of alkali recovery boiler |
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| WO1999010696A1 (en) * | 1997-08-27 | 1999-03-04 | Electric Power Research Institute, Inc. | Method for repairing heat exchanger tubing through partial tube replacement |
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| CN100458261C (en) * | 2007-06-29 | 2009-02-04 | 大庆石油管理局 | Small diameter metal pipe long-range lining glass reinforced plastic hose repairing method |
| CN101762633A (en) * | 2008-12-25 | 2010-06-30 | 中国石油天然气股份有限公司 | Method for rapidly detecting pipeline body defects |
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2010
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| WO1999010696A1 (en) * | 1997-08-27 | 1999-03-04 | Electric Power Research Institute, Inc. | Method for repairing heat exchanger tubing through partial tube replacement |
| RU2235011C1 (en) * | 2003-09-26 | 2004-08-27 | Андрианов Николай Филиппович | Method for making or repairing heat exchange sections of air cooled apparatuses |
| CN100458261C (en) * | 2007-06-29 | 2009-02-04 | 大庆石油管理局 | Small diameter metal pipe long-range lining glass reinforced plastic hose repairing method |
| CN101762633A (en) * | 2008-12-25 | 2010-06-30 | 中国石油天然气股份有限公司 | Method for rapidly detecting pipeline body defects |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106514127A (en) * | 2015-09-09 | 2017-03-22 | 上海上电漕泾发电有限公司 | Water-cooling wall pipe replacing process |
| CN106180988A (en) * | 2016-08-23 | 2016-12-07 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN106180987A (en) * | 2016-08-23 | 2016-12-07 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN106239029A (en) * | 2016-08-23 | 2016-12-21 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN106239029B (en) * | 2016-08-23 | 2018-06-01 | 郑州荣奇热电能源有限公司 | A kind of high temperature superheater imports and exports header restorative procedure |
| CN110549069A (en) * | 2019-07-15 | 2019-12-10 | 中国南方航空股份有限公司 | Method for repairing damage of anti-icing pipeline of engine air inlet |
| CN110549069B (en) * | 2019-07-15 | 2022-04-05 | 中国南方航空股份有限公司 | Method for repairing damage of anti-icing pipeline of engine air inlet |
| CN114393282A (en) * | 2022-01-19 | 2022-04-26 | 云南建投第二安装工程有限公司 | Treatment method for welding operation of boiler shed pipe of alkali recovery boiler |
| CN114393282B (en) * | 2022-01-19 | 2024-04-05 | 云南建投第二安装工程有限公司 | Treatment method for welding operation of furnace shed pipe of alkali recovery boiler |
| CN114734201A (en) * | 2022-05-06 | 2022-07-12 | 中煤哈密发电有限公司 | Comprehensive treatment method for cracks of header tube seat on boiler side water-cooling wall |
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