CN103742932B - The remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization - Google Patents
The remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization Download PDFInfo
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- CN103742932B CN103742932B CN201310747742.6A CN201310747742A CN103742932B CN 103742932 B CN103742932 B CN 103742932B CN 201310747742 A CN201310747742 A CN 201310747742A CN 103742932 B CN103742932 B CN 103742932B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000003546 flue gas Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 17
- 230000023556 desulfurization Effects 0.000 title claims abstract description 17
- 239000003245 coal Substances 0.000 title claims abstract description 15
- 238000007634 remodeling Methods 0.000 title claims abstract description 13
- 239000003292 glue Substances 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 238000002788 crimping Methods 0.000 claims abstract description 13
- 238000005260 corrosion Methods 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 230000032798 delamination Effects 0.000 description 5
- 239000011449 brick Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
Abstract
The present invention relates to the remodeling method of the anticorrosion chimney of a kind of coal fired power plant flue gas desulfurization, starting subsides downwards from chimney top, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, sheet rubber is vertically attached on inner wall of stack, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down, exposes chimney top end surface part sheet rubber and wraps chimney top end surface and outside to turning up, prevents corrosive medium from pouring in down a chimney; During the 2nd circle line with rubber, its film upper end should cover the first circle film end (being called for short overlap joint), cover (overlap joint) width 20-30mm, when line with rubber is constructed, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, vertically being attached on inner wall of stack by sheet rubber, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down; Until chimney bottom last lap, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, sheet rubber is vertically attached on inner wall of stack.
Description
Technical field
The present invention relates to a kind of can fundamentally solve existing coal-fired chimney lining because vibrate, rocks, the technical barriers such as chimney lining crack that factor causes, delamination, seepage, corrosion such as stress is concentrated, make coal-fired chimney anticorrosion safety performance obtain thoroughly improvement and can greatly extend the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization of coal-fired chimney work-ing life and reduction manufacturing cost, belong to coal-burning power plant's chimney and manufacture field.
Background technology
Chimney is the important component part of thermal power generation system, carries important task that the flue gas of boiler combustion is discharged in atmospheric layer. In the non-desulfurization epoch, flue gas is in line to atmospheric layer through chimney from boiler. This in period chimney the brick air retaining wall technology of interior anticorrosion mainly fire resistant anticorrosive, belong to dry flue system, smoke discharging temperature is about: 125 180 DEG C, does not substantially produce corrosion; And the arrival in current desulfurization epoch, then changing the Working environment of chimney greatly, dry flue originally becomes wet flue, boiler flue corrosion environment severe exacerbation. Show: a. corrosive medium: SO2, SO3; B. temperature < acid dew point, acid solution is trickled downwards along flue wall, and period evaporates repeatedly, trickling, be in for a long time acid invade bubble state, cause corrosion; C. the outer pressure of pressure in flue, has negative pressure; D. fast 3��8 times of the usual state of etch ratio. Working environment so brings great risk to the operating safety of chimney, and corrosion leakage happens occasionally, and causes greatly shorten the work-ing life of chimney, directly affects the normal power generation of power plant. Around this theme, chimney anticorrosion expanding extensive and deep research and industrial application discussion, concludes at present and have following two big types: one is brick inside lining anti-corrosive sealing ply, and acid resisting brick as various in interior block, plate are traditional anticorrosion means, it is not enough
Part is that globality is poor, easily produces crack, causes seepage anticorrosion; Two is the various protective system of coating, and as corrosion-resistant glass-flake coating and lining paste applied corrosion resistant lining, such as titanium composite panel etc., but this class aseptic technic shows versatility because of the difference of materials and process. As: the high performance corrosion resistant metal titanium plate of a. liner.But cost height, welding technique requires high, and weld seam easily produces corrosion. B. corrosion-resistant glass squama resin resistant coating is sprayed. Advantage is acidproof, high temperature resistant, impervious, but easily plays skin or come off.
Summary of the invention
Purpose of design: avoid the weak point in background technology, design a kind of can fundamentally solve existing coal-fired chimney lining because vibrate, rocks, stress the factor such as concentrate to cause chimney lining crack, delamination, seepage, the technical barrier such as corrosion, make coal-fired chimney anticorrosion safety performance obtain thoroughly improving and can greatly extend the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization of coal-fired chimney work-ing life and reduction manufacturing cost.
Design: can have no to discuss different drawing from background technology: causing coal-fired chimney anticorrosion to damage the most direct factor is technological factor, but not the not resistance to Chemical Preservation of main material causes. As: brick liner produces the weld decay of crack, the delamination of glass flake coatings, crack, titanium composite panel etc. all because chimney shape is tall and big, easily vibrate, rock, cause stress concentrate and material coefficient of linear expansion inharmonious etc., chimney anticorrosion slabbing seam and delamination is caused to damage, thus exploitation is a kind of anti-shake dynamic, stress can be disperseed to concentrate, and the aseptic technic that can coordinate different coefficient of linear expansion is the key of technology of chimney anticorrosion. In order to realize this purpose. The present invention 1) select elastomeric material as the corrosion-proof lining layer of chimney, but not the air retaining wall of other material. 2) tackiness agent having and bonding as rubber and inner wall of stack with the tackiness agent of rubber liner layer and steel plate excellent bonds is selected. 3) select rubber lined self cure technique, make rubber have good shockproof, anticracking, antiseepage, protection against the tide, waterproof, ventilative, resistance to ozone, weather-resistant, weak acid resistant weak base performance.
Technical scheme: the remodeling method of the anticorrosion chimney of a kind of coal fired power plant flue gas desulfurization, in chimney steel, courage is made, hold up, anti-corrosion rubber lined construction line with rubber by upper end, top, that is: (1) from chimney top downwards (downward length how much rice looks the length of film used or the convenience of construction and different, is generally 10 meters) paste. At inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, sheet rubber is vertically attached on inner wall of stack, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down, expose chimney top end surface part sheet rubber and wrap chimney top end surface and outside to turning up, prevent corrosive medium from pouring in down a chimney. During (2) the 2nd circle line with rubber, its film upper end should cover the first circle film end (being called for short overlap joint), cover (overlap joint) width 20-30mm, when line with rubber is constructed, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, vertically being attached on inner wall of stack by sheet rubber, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down. (3) analogize successively, until chimney bottom last lap, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, being vertically attached on inner wall of stack by sheet rubber, left and right sheet rubber overlaps mutually, the upper and lower mutual fissure of displacement of sheet rubber crimps, last lap chimney film is concordant with chimney bottom, after the construction installations such as scaffolding are removed, lining pastes chimney bottom, and the sheet rubber that bottom lining pastes should turn over 30mm on bucket wall, and pressure viscosity is firm.
The present invention is compared with background technology, and one is owing to rubber-type glue is flexible, and the application adopts rubber-type glue can adapt to chimney deformation in use;Two is become to be integrated after the bonding between rubber with rubber adopts rubber solution to bond, to construction temperature not requirement, do not need the temperature by flue gas in flue to accelerate bonding yet, and solve vibration that background technology exists, rock, the technical barriers such as crack that factor causes, delamination, seepage, corrosion such as stress is concentrated; Three is that the life-span of its chimney can reach more than 30 years owing to the anticorrosion safety performance of chimney obtains thorough improvement, and construction technology simplifies, manufacturing cost obviously declines; Four is the technological gap having filled up chimney rubber anti-corrosive lining, changes traditional structure &processes of chimney anticorrosion.
Accompanying drawing explanation
Fig. 1 is the partial cutaway TV structure schematic diagram of the anticorrosion chimney of coal fired power plant flue gas desulfurization.
Fig. 2 is the structural representation of left and right overlap joint in Fig. 1, sheet rubber fissure of displacement crimping up and down.
Fig. 3 is the sectional structure schematic diagram of upper and lower sheet rubber fissure of displacement crimping.
Fig. 4 is the structural representation of overlap joint about sheet rubber.
Fig. 5 is chimney top sheet rubber package structure schematic diagram.
Embodiment
Embodiment 1: with reference to accompanying drawing 1-5. The remodeling method of the anticorrosion chimney of a kind of coal fired power plant flue gas desulfurization, in chimney steel, courage is made, hold up, anti-corrosion rubber lined construction line with rubber by upper end, top, that is: (1) from chimney top downwards (downward length how much rice looks the length of film used or the convenience of construction and different, is generally 10 meters) paste. At inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, sheet rubber is vertically attached on inner wall of stack, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down, expose chimney top end surface part sheet rubber and wrap chimney top end surface and outside to turning up, prevent corrosive medium from pouring in down a chimney. During (2) the 2nd circle line with rubber, its film upper end should cover the first circle film end (being called for short overlap joint), cover (overlap joint) width 20-30mm, when line with rubber is constructed, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, vertically being attached on inner wall of stack by sheet rubber, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down. (3) analogize successively, until chimney bottom last lap, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the rubber back side, sheet rubber is vertically attached on inner wall of stack, left and right sheet rubber overlaps mutually, the upper and lower mutual fissure of displacement of sheet rubber crimps, last lap chimney film is concordant with chimney bottom, after the construction installations such as scaffolding are removed, lining pastes chimney bottom, and the sheet rubber that bottom lining pastes should turn over about 30mm(on bucket wall, but it is not limited to this), pressure viscosity is firm.
Described rubber lining 4 is made up of the sheet rubber overlapped mutually about multi-disc sheet rubber, the fissure of displacement crimps mutually up and down. About described multi-disc sheet rubber, overlap joint refers to that the sheet rubber 41 ' limit on the right is pressed on left side sheet rubber 41 limit the rubber gasket formed mutually, or about multi-disc sheet rubber, overlap joint refers to that the sheet rubber 41 ' limit on the left side is pressed on sheet rubber 41 limit, the right the rubber gasket formed mutually. Described multi-disc sheet rubber up and down mutually fissure of displacement crimping refer to that the 2nd circle sheet rubber 42 top is pressed in the following of the first circle sheet rubber 41, analogize with this, or multi-disc sheet rubber up and down mutually fissure of displacement crimping refer to that the 2nd circle sheet rubber 42 top is crushed on the following of the first circle sheet rubber 41, analogize with this. Described primer 2 adopts rubber-type glue. Described glue 3 adopts rubber-type glue. Described chimney 1 upper surface and outside portion, upper surface are overlapped mutually the circle flange coated 43 formed about multi-disc sheet rubber.
Example: the anticorrosion chimney specific embodiment of coal fired power plant flue gas desulfurization is lifted:
(1) the anticorrosion inner layer material selected is rubber anti-corrosive material: its basic size is: 1000m �� 1m �� 0.0025m offset plate, it is possible to depending on the height of chimney and diameter in conjunction with site operation environment.
(2) real construction environment: construction environment temperature is advisable with 8��35 DEG C; Relative humidity is less than 80%; Atmospheric environment is minimum should remain on dew point more than 3 DEG C.
(3) chimney steel body inner surface treatment: with copper ore or quartz sand or other abrasive material, chimney steel body internal surface being carried out derusting by sandblast, derusting grade is more than Sa2.5 level.
(4) brushing adhesive stick: be included in offset plate and chimney steel body internal surface brushing adhesive stick.
(5) lining pastes: be attached to chimney barrel internal surface being coated with the offset plate lining being brushed with tackiness agent. Develop, compacting. Lining adopts lapping type, and lap width is determined according to the lining number of plies, and bilayer is 20 �� 5mm, and individual layer is 30 �� 5mm, and overlap joint requires that line operates, and accomplishes directly neat, must not adopt cross-like seam, should adopt T-shaped seam; During the T-shaped seam of stickers lining, first the face of lap-joint of lower floor should be whittled into inclined-plane, then stickers lining upper rubber plate. Seam should comply with the flow direction of flue gas, and should be not reverse.
(6) serve as a contrast after subsides complete and can come into operation, in use complete sulfuration.
Embodiment 2: on the basis of embodiment 1, old chimney is transformed, erect chimney outside chimney and hang cage, hanging cage puts in chimney, construction worker stands in and hangs in cage, construction worker relies on and hangs cage and inner wall of stack repeatedly fixing at different heights, first processes the corrosion of inner wall of stack, then anti-corrosion rubber lined construction line with rubber by upper end, top.
It is to be understood that: the detailed text description although the mentality of designing of the present invention is contrasted by above-described embodiment; but these text descriptions; just the simple text of inventive design thinking is described; instead of the restriction to inventive design thinking; any combination, increase or amendment not exceeding inventive design thinking, all falls within the scope of protection of the present invention.
Claims (6)
1. a remodeling method for the anticorrosion chimney of coal fired power plant flue gas desulfurization, is characterized in that in chimney steel, courage is made, holds up, anti-corrosion rubber lined construction line with rubber by upper end, top, that is:
(1) starting from chimney top to paste downwards, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the sheet rubber back side, sheet rubber is vertically attached on inner wall of stack, left and right sheet rubber overlaps mutually, expose chimney top end surface part sheet rubber and wrap chimney top end surface and outside to turning up, prevent corrosive medium from pouring in down a chimney;
During (2) the 2nd circle line with rubber, sheet rubber upper end should cover the first circle sheet rubber end, cover width 20-30mm, when line with rubber is constructed, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the sheet rubber back side, vertically being attached on inner wall of stack by sheet rubber, left and right sheet rubber overlaps mutually, the mutual fissure of displacement crimping of sheet rubber up and down;
(3) analogize successively, until chimney bottom last lap, at inner wall of stack brush the first layer primer, after the glue of brush second layer face, the sheet rubber back side, being vertically attached on inner wall of stack by sheet rubber, left and right sheet rubber overlaps mutually, the upper and lower mutual fissure of displacement of sheet rubber crimps, last lap sheet rubber is concordant with chimney bottom, after construction installation is removed, lining pastes chimney bottom, and the sheet rubber that bottom lining pastes should turn over 30mm on inner wall of stack, and pressure viscosity is firm.
2. the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization according to claim 1, it is characterized in that: between about described sheet rubber, overlap joint refers to that the left end of middle sheet rubber is pressed on the sheet rubber of the left side mutually, the rubber gasket that the middle sheet rubber the other end is formed under being then pressed in the right sheet rubber.
3. the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization according to claim 1, it is characterized in that: between described sheet rubber is upper and lower, fissure of displacement crimping refers to that the 2nd circle sheet rubber upper end is crushed on the bottom of the first circle sheet rubber mutually, analogize with this, or sheet rubber up and down between mutually fissure of displacement crimping refer to that the bottom of the first circle sheet rubber is pushed down in the 2nd circle sheet rubber upper end.
4. the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization according to claim 1, is characterized in that: described primer adopts rubber-type glue.
5. the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization according to claim 1, is characterized in that: described glue adopts rubber-type glue.
6. the remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization according to claim 1, is characterized in that: described upper chimney end face and outside portion, upper surface are coated by the circle flange that about multi-disc sheet rubber, overlap joint is formed mutually.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747742.6A CN103742932B (en) | 2013-12-31 | 2013-12-31 | The remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747742.6A CN103742932B (en) | 2013-12-31 | 2013-12-31 | The remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization |
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| Publication Number | Publication Date |
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| CN103742932A CN103742932A (en) | 2014-04-23 |
| CN103742932B true CN103742932B (en) | 2016-06-08 |
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| CN201310747742.6A Expired - Fee Related CN103742932B (en) | 2013-12-31 | 2013-12-31 | The remodeling method of the anticorrosion chimney of coal fired power plant flue gas desulfurization |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109631065A (en) * | 2018-12-27 | 2019-04-16 | 上海辰鸣电力工程有限公司 | A kind of flue duct retrofit method and its anticorrosion structure |
| CN110253901A (en) * | 2019-05-06 | 2019-09-20 | 江苏科强新材料股份有限公司 | A kind of rubber liner construction method of Anti-corrosive chimney |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4433202C1 (en) * | 1994-09-17 | 1996-02-01 | Theodor Vanck Gmbh & Co Kg | Composite corrosion protection, for flue gas desulphurisation plant, |
| JP2007285513A (en) * | 2006-03-22 | 2007-11-01 | Tokai Rubber Ind Ltd | Rubber member with metal fitting and method of fabricating the same |
| CN2892254Y (en) * | 2006-04-07 | 2007-04-25 | 北京龙源环保工程有限公司 | Wet desulfating flue exhausting integrated apparatus |
| CN101497773B (en) * | 2009-01-24 | 2012-01-11 | 黑龙江省科学院石油化学研究院 | Undercoat adhesive for bonding hot vulcanization and preparation thereof |
| CN101602927B (en) * | 2009-03-27 | 2012-03-21 | 重庆大众防腐有限公司 | Bottom bonding material used in preservative treatment of chimney and flue |
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Application publication date: 20140423 Assignee: HANGZHOU SHOWER RUBBER ENGINEERING Co.,Ltd. Assignor: Zhang Qinghu Contract record no.: 2016330000121 Denomination of invention: Modification method of flue gas desulfuration corrosion-resistant chimney of coal-fired power plant Granted publication date: 20160608 License type: Exclusive License Record date: 20160811 |
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