CN205372592U - Corrosion control system behind steel sleeve chimney wet flue gas desulfurization - Google Patents
Corrosion control system behind steel sleeve chimney wet flue gas desulfurization Download PDFInfo
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- CN205372592U CN205372592U CN201620030421.3U CN201620030421U CN205372592U CN 205372592 U CN205372592 U CN 205372592U CN 201620030421 U CN201620030421 U CN 201620030421U CN 205372592 U CN205372592 U CN 205372592U
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- chimney
- corrosion
- control system
- protection system
- corrosion protection
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Abstract
The utility model discloses a corrosion control system behind steel sleeve chimney wet flue gas desulfurization. This corrosion control system outside -in includes in proper order that chimney reinforced concrete urceolus, chimney steel inner tube, coating are in under coat, coating on the inner wall of chimney steel inner tube are in corrosion -preventing glue adhesion agent layer and coating on the under coat inner wall are in the anticorrosive vitrified tile of light on the corrosion -preventing glue adhesion agent in situ wall. The utility model discloses corrosion control system behind steel sleeve chimney wet flue gas desulfurization has strengthened antagonism hydrofluoric acid corrosion behavior, and the at present internal chimney anti -corrosion material of the same kind of effective improvement is not able to bear or endure the shortcoming that hydrofluoric acid corrodes, and the price is less than external like product. Simultaneously, the elasticity on this corrosion -preventing glue adhesion agent layer produces deformation along with the change of temperature to avoid appearing the destruction that stress caused to corrosion control system.
Description
Technical field
This utility model relates to chimney anticorrosion field, particularly to the corrosion protection system after a kind of steel bushing chimney wet desulphurization.
Background technology
Steel bushing chimney urceolus is generally adopted reinforced concrete structure, and inner core is steel structure, and namely the armored concrete urceolus of load-bearing and smoke evacuation inner core separately, eliminate the flue-gas temperature impact on carrying cylinder, it is to avoid the flue gas corrosion to carrying cylinder.At present, the design of domestic inner steel cylinder of chimney generally adopts self-supporting or two kinds of versions of sectional suspension formula.Steel inner cylinder is divided into several sections by sectional suspension formula steel inner cylinder, be suspended on each bearing platform respectively, arranges expansion joint and connect between each section, and stack shell cross section, based on tension, can give full play to the advantage that copper coin examining tensile behavior is good, it is to avoid the local buckling of copper coin.Comparing self-supporting, sectional suspension formula steel inner cylinder stack shell copper plate thickness is relatively thin, and rolled steel dosage is less, and economic advantages are obvious, obtains the approval of more and more owner.After wet desulphurization, Steel Inner Core of Chimney works for a long time under sour environment, and the dual function by flue gas pressures and humidity corrodes, and has a strong impact on chimney safe handling and structure durability, therefore inner steel cylinder of chimney is carried out anticorrosive construction.
Currently, the domestic generally individually employing of some power plant " adhesive+heat insulating brick " system is as the Corrosion prevention scheme of Wet chimney.Also designer is had to add different coating therein, but the problem that there is intensity heat insulation effect weak, moistureproof poor, acidproof (mainly Fluohydric acid. HF) corrosivity difference and not temp. variation resistant all in various degree.
Utility model content
Technical problem to be solved in the utility model is to provide the corrosion protection system after a kind of steel bushing chimney wet desulphurization, which overcomes the drawbacks described above of prior art.
Technical problem to be solved in the utility model is achieved through the following technical solutions:
Corrosion protection system after a kind of steel bushing chimney wet desulphurization, ecto-entad includes chimney reinforced concrete urceolus, inner steel cylinder of chimney, the priming coat being coated on the inwall of described inner steel cylinder of chimney, the dope adhesive layer being coated on described priming coat inwall successively and is coated in the lightweight anticorrosion vitrified tile on described dope adhesive layer inwall.
Preferably, in technique scheme, described priming coat is with epoxy resin modified organosilicon resin for film forming binder, adds the bi-component Heat and corrosion resistant coating layer of heat-resisting color stuffing, additive processing preparation.
Preferably, in technique scheme, described dope adhesive layer is asphalt modification polyurethane adhesive layer.
Preferably, in technique scheme, described lightweight anticorrosion vitrified tile be with mineral be raw material foamed glass brick or Ceramic Tiles.
Preferably, in technique scheme, the coating method of described priming coat is roller coating.
Preferably, in technique scheme, the thickness of described dope adhesive layer is about 2-4mm.
This utility model technique scheme, has the advantages that
Compared with prior art, corrosion protection system after steel bushing chimney wet desulphurization of the present utility model, it is effectively prevented in desulphurization system acid and the flue gas corrosion to chimney, especially antagonism Fluohydric acid. corrosive nature is strengthened, the shortcoming being effectively improved current domestic similar chimney anticorrosion material not hydrofluoric acid corrosion resistance, and price is lower than same kind of products at abroad.Meanwhile, the elastic variation with temperature of this dope adhesive layer and produce deformation, thus avoiding the occurrence of the destruction that corrosion protection system is caused by stress.
Accompanying drawing explanation
Fig. 1 is the chimney structure schematic diagram before anticorrosion.
Fig. 2 is funnel body anticorrosive coat floor map of the present utility model.
Fig. 3 is funnel body anticorrosive coat section plan of the present utility model.
Wherein, 1-chimney reinforced concrete urceolus, 2-inner steel cylinder of chimney, 3-priming coat, 4-dope adhesive layer, 5-lightweight anticorrosion vitrified tile.
Detailed description of the invention
Below detailed description of the invention of the present utility model is described in detail, in order to be further appreciated by this utility model.
Fig. 1 is the chimney structure schematic diagram before anticorrosion.As it can be seen, chimney is generally followed successively by from outside to inside: chimney reinforced concrete urceolus 1 and inner steel cylinder of chimney 2.Fig. 2 is funnel body anticorrosive coat floor map of the present utility model.As in figure 2 it is shown, this utility model increases priming coat 3, dope adhesive layer 4 and lightweight anticorrosion vitrified tile 5 on the basis of Fig. 1 chimney.Specifically, chimney of the present utility model is followed successively by from outside to inside: chimney reinforced concrete urceolus 1, inner steel cylinder of chimney 2, priming coat 3, dope adhesive layer 4 and lightweight anticorrosion vitrified tile 5.
Priming coat 3 is the special primary coat of happy haze that Beijing Kai Lan Yifang Technology Co., Ltd. produces.This priming coat 3, with epoxy resin modified organosilicon resin for film forming binder, adds heat-resisting color stuffing, specialist additive etc., through the bi-component Heat and corrosion resistant coating that advanced technologies is prepared from.This material has antiacid, alkali resistant, the temperature resistance of excellence and becomes and closed performance, superpower adhesive property, it is adaptable to the confining bed of the anti-corrosion material of facility and base material under the special environment of coal-burning power plant.
Dope adhesive layer 4 is the happy haze dope stick that Beijing Kai Lan Yifang Technology Co., Ltd. produces.Dope stick 4 is the asphalt modification polyurethane adhesive that Wet chimney anticorrosion is special.It plays the antisepsis of key in corrosion protection system, and acid resistance is good, the corrosion of certain density acid solution can be resisted, and this kind of material can produce certain self-healing ability after multiple mixed acid solution environment produces initial destruction, the intensity making loss is made up, thus extending this kind of material service life under acid corrosion environment；The corrosion of certain density Fluohydric acid. (HF) can be resisted；There is relatively low vapor pervious rate, chimney is in operation under positive pressure state when properly functioning, although pressure is little, but the corrosiveness of chimney is affected very big by it, flue gas and acid solution can be made through liner tile and acidproof adhesive film, and this feature requires glued membrane it is necessary to have low water vapor transmittance.
The antiseptic property of above-mentioned dope stick 4 is better than domestic adhesive, and the external product that price is suitable lower than performance, Adhensive performance is compared as follows shown in table 1:
Table 1
Table 2
Dope stick soak test result in mixed acid of the present utility model
By table 1 and table 2 it can be seen that domestic organic silica gel lengthen in time in experimentation fall slag gradually, thinning, when 10 days, hot strength has decayed to the 20% of ortho states, presents broken shape after 20 days, it is impossible to test.
Bin Gaode batten soaked through 50 days, and color becomes brown from black, batten becomes, and hard resilience is slack-off, and elongation at break declines to some extent, although hot strength still has 0.4MPa, but spline local has produced perfoliate hole.
Dope stick 4 decay resistance is significantly better than domestic organic silica gel, and soaked color through 50 days unchanged, smooth surface, intact, keeps the hot strength also higher than Bin Gaode glue；Known through Integrated comparative: domestic organic silicon adhesive is not corrosion-resistant, this adhesive decay resistance is better than Bin Gaode glue.
The lightweight anticorrosion vitrified tile that lightweight anticorrosion vitrified tile 5 Beijing Kai Lan Yifang Technology Co., Ltd. produces.With mineral for raw material, add appropriate, a large amount of gas can be produced at a certain temperature, there is the mixture of the host mineral of expansion character, pass through optimization of C/C composites, adjust acid number coefficient, grain composition, take reasonably mixing, molding, method for cooking, Optimizing Process Parameters, raw material is made to produce the glassy phase that viscosity is bigger under the effect of inorganic compounding mineralizer, the a large amount of gases released with host mineral form the bubble of remaining silent uniformly gathered, by cooling down, processing, make bulk density little, heat conductivity is low, good heat-insulation effect, volume water absorption rate is low, anti-freezing property is excellent, the features such as water proof anti-seepage ability is strong, it it is the high-performance light vitreous Ceramic Tiles that can use for a long time in adverse circumstances.
Corrosion protection system manufacture method after a kind of steel bushing chimney wet desulphurization, comprises the following steps:
(1), inner steel cylinder of chimney 2 is carried out blasting treatment, cleannes grade is Sa2.5, it is in detail: steel bushing is carried out substrate cleaning, interior tube inner surface after cleaning must dry, firm, closely knit, must not there be the phenomenons such as dusting, shelling, crackle, cleannes grade is Sa2.5 (steel surface is without attachments such as visible oils and fats, dirt, oxide skin, rust and painting layers), it is ensured that corrosion protection system substrate is firm；
(2), substrate cleaning qualified after carry out rapidly primary coat construction, anticorrosion secondary gets rusty, coating thickness >=0.1mm, formed priming coat 3.Happy haze special bottom is coated with construction and adopts roll coating process, to obtain good painting effect.The order of roller coating from top to bottom, from left to right, should disorderly not apply, it is to avoid cause holiday or brush blocked up, brush unequal.
(3), happy haze dope stick is stirred, scrape a layer thickness in the special primed surface painting of happy haze and be about the primer of about 1-2mm, be coated with and scrape uniform full no sag, form dope adhensive layer 4.
(4), pasting happy haze lightweight anticorrosion vitrified tile 5, the topcoating to be contacted of Ceramic Tiles carrying out installing is smeared one layer of happy haze dope stick, THICKNESS CONTROL is at about 1-2mm, and glue-line gross thickness is about 2-4mm, and between brickwork joint, adhesive is full closely knit, leaves no gaps.Between brick and brick, circumferential weld is connection seam, and longitudinal joint answers the fissure of displacement to arrange.Fissure of displacement width is 1/2 that brick is wide, minimum cannot be less than 1/3.
Corrosion protection system after above-mentioned steel bushing chimney wet desulphurization carries out anticorrosive construction when ensureing chimney structure safety, by the adhesive in corrosion protection system is optimized, (happy haze dope stick strengthens antagonism Fluohydric acid. corrosive nature, happy haze anticorrosion adhesive stretch variation with temperature and produce deformation), thus avoiding the occurrence of the destruction that corrosion protection system is caused by stress.The shortcoming being effectively improved current domestic similar chimney anticorrosion material not hydrofluoric acid corrosion resistance, and price is lower than same kind of products at abroad.
Although this utility model is with embodiment openly as above; so it is not intended to limit this utility model; any those skilled in the art; without departing from spirit and scope of the present utility model; all can doing various different selection and amendment, therefore protection domain of the present utility model is limited by claims and equivalents thereof.
Claims (5)
1. the corrosion protection system after a steel bushing chimney wet desulphurization; ecto-entad includes chimney reinforced concrete urceolus (1) and inner steel cylinder of chimney (2) successively; it is characterized in that, described corrosion protection system also includes: the dope adhesive layer (4) that be coated in the priming coat on the inwall of described inner steel cylinder of chimney (2) (3), is coated on described priming coat (3) inwall and be coated in lightweight anticorrosion vitrified tile (5) on described dope adhesive layer (4) inwall.
2. the corrosion protection system after steel bushing chimney wet desulphurization according to claim 1, it is characterised in that described dope adhesive layer (4) is asphalt modification polyurethane adhesive layer.
3. the corrosion protection system after steel bushing chimney wet desulphurization according to claim 1, it is characterised in that described lightweight anticorrosion vitrified tile (5) be with mineral be raw material foamed glass brick or Ceramic Tiles.
4. the corrosion protection system after steel bushing chimney wet desulphurization according to claim 1, it is characterised in that the coating method of described priming coat (3) is roller coating.
5. the corrosion protection system after steel bushing chimney wet desulphurization according to claim 2, it is characterised in that the thickness of described dope adhesive layer (4) is 2-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620030421.3U CN205372592U (en) | 2016-01-13 | 2016-01-13 | Corrosion control system behind steel sleeve chimney wet flue gas desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620030421.3U CN205372592U (en) | 2016-01-13 | 2016-01-13 | Corrosion control system behind steel sleeve chimney wet flue gas desulfurization |
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| CN205372592U true CN205372592U (en) | 2016-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509079A (en) * | 2016-01-13 | 2016-04-20 | 北京恺岚一方科技发展有限公司 | Corrosion prevention system for steel sleeve chimney after wet desulphurization and manufacturing method of corrosion prevention system |
| CN109028119A (en) * | 2018-08-03 | 2018-12-18 | 青铜峡铝业发电有限责任公司 | A kind of anti-corrosion chimney and its construction method of installation |
-
2016
- 2016-01-13 CN CN201620030421.3U patent/CN205372592U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509079A (en) * | 2016-01-13 | 2016-04-20 | 北京恺岚一方科技发展有限公司 | Corrosion prevention system for steel sleeve chimney after wet desulphurization and manufacturing method of corrosion prevention system |
| CN109028119A (en) * | 2018-08-03 | 2018-12-18 | 青铜峡铝业发电有限责任公司 | A kind of anti-corrosion chimney and its construction method of installation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20190113 |