CN105509078A - Anticorrosion system for detaching lining after wet desulfuration of traditional single-tube chimney and manufacturing method - Google Patents
Anticorrosion system for detaching lining after wet desulfuration of traditional single-tube chimney and manufacturing method Download PDFInfo
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- CN105509078A CN105509078A CN201610019395.9A CN201610019395A CN105509078A CN 105509078 A CN105509078 A CN 105509078A CN 201610019395 A CN201610019395 A CN 201610019395A CN 105509078 A CN105509078 A CN 105509078A
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- anticorrosion
- chimney
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- protection system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/02—Linings; Jackets; Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2213/00—Chimneys or flues
- F23J2213/10—Linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2213/00—Chimneys or flues
- F23J2213/30—Specific materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses an anticorrosion system for detaching a lining after wet desulfuration of a traditional single-tube chimney and a manufacturing method. The anticorrosion system comprises a chimney tube body reinforced concrete wall layer (1), a quick-dry mortar repair layer (4) with which the inner wall of the chimney tube body reinforced concrete wall layer (1) is coated, a bottom coating (5) with which the inner wall of the quick-dry mortar repair layer (4) is coated, an anticorrosion adhesive layer (6) with which the inner wall of the bottom coating (5) is coated, and light anticorrosion vitrified tiles with which the inner wall of the anticorrosion adhesive layer (6) is coated. By means of the chimney anticorrosion system, hydrofluoric acid corrosion resistance is enhanced, the defect that existing national like chimney anticorrosion materials do not resist hydrofluoric acid corrosion is effectively overcome, and the price is lower than that of international like products. Meanwhile, the elasticity of the anticorrosion adhesive layer changes according to the changes of temperature, and therefore the damage caused by stress to the anticorrosion system is avoided.
Description
Technical field
The present invention relates to chimney anticorrosion field, corrosion protection system of particularly a kind of traditional single-drum chimney wet desulphurization rear inner lining dismounting and preparation method thereof.
Background technology
In recent years, China's power construction obtains develop rapidly, the lifting of progressively raising and the energy-conserving and environment-protective dynamics of national environmental standard, domesticly all require to carry out chimney desulfurization process to newly-built power-plant engineering and original power plant, power-plant flue gas wet desulfurization system becomes the Key Environmental Protection field of National strategic planning.Therefore, also extremely urgent to the transformation and upgrade of original system.
Some current chimneys particularly old chimney design do not design according to the requirement of wet flue gas discharge, wet flue gas to chimney acidproof brick inner liner and heat insulation layer cause burn into destroy or by acid accumulator penetration, the chimney of structural safety and service requirement can not be met for inner lining structure after structure detection, we transform chimney, remove former liner and heat-insulation layer, carry out anticorrosive construction.Therefore, how can meet the old chimney of structural safety and service requirement and some newly-built chimneys to existing inner lining structure to carry out inside lining anti-corrosive process and set up current problem demanding prompt solution.
Current, some domestic power plant generally all adopt " adhesive+heat insulating brick " system as the Corrosion prevention scheme of Wet chimney.Also designer is had to add different coating therein, but the problem that there is weak, the moistureproof heat insulation effect of intensity poor, acidproof (mainly hydrofluoric acid HF) corrosivity difference and not temp. variation resistant all in various degree.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of corrosion protection system and preparation method of traditional single-drum chimney wet desulphurization rear inner lining dismounting, which overcomes the above-mentioned defect of prior art.
Technical problem to be solved by this invention is achieved through the following technical solutions:
The corrosion protection system that a kind of traditional single-drum chimney wet desulphurization rear inner lining is removed; comprise chimney shaft reinforced concrete parietal layer, be coated in the fast dry mortar repair layer on described chimney shaft reinforced concrete parietal layer inwall, the priming coat be coated on described fast dry mortar repair layer inwall, be coated in the dope adhesive layer on described priming coat inwall and be coated in the anticorrosion vitrified tile of lightweight on described dope adhesive layer inwall.
Preferably, in technique scheme, described priming coat be with epoxy resin modified organosilicon resin for film forming binder, add heat-resisting color stuffing, additive processing preparation bi-component Heat and corrosion resistant coating layer.
Preferably, in technique scheme, described dope adhesive layer is asphalt modification polyurethane adhesive layer.
Preferably, in technique scheme, the anticorrosion vitrified tile of described lightweight take mineral as foamed glass brick or the Ceramic Tiles of raw material.
Preferably, in technique scheme, the thickness of described fast dry mortar repair layer is 2-3mm.
Preferably, in technique scheme, the thickness >=0.1mm of described priming coat.
Preferably, in technique scheme, the coating method of described priming coat is roller coating.
A preparation method for the corrosion protection system that traditional single-drum chimney wet desulphurization rear inner lining is removed, this preparation method comprises the following steps:
(1) chimney acidproof brick inner liner and heat insulation layer is removed;
(2) repair the fast dry mortar in cast concrete base irregular out-of-flatness position, depth of plastering is 2-3mm, forms fast dry mortar repair layer;
(3) after substrate cleaning, at the priming coat of fast dry mortar repair layer inwall roller coating a layer thickness >=0.1mm;
(4) dope stick is stirred, be coated with at base coating surface and scrape the thick dope stick of one deck 1-2mm as primer, be coated with and scrape even full no sag;
(5) the thick dope stick of one deck 1-2mm is smeared in the face to be contacted of the anticorrosion vitrified tile of lightweight carrying out installing, paste the anticorrosion vitrified tile of lightweight, glue-line gross thickness is about 2-4mm.
Preferably, in technique scheme, between every two adjacent anticorrosion vitrified tiles of lightweight, circumferential weld is connection seam, and the longitudinal joint fissure of displacement arranges.
Preferably, in technique scheme, described fissure of displacement width is the 1/3-1/2 of the anticorrosion vitrified tile width of described lightweight.
Technique scheme of the present invention, has following beneficial effect:
Compared with prior art, chimney anticorrosion system of the present invention, happy haze special anti-corrosion adhesive is utilized the priming coat and brick layer that are coated on inner wall of stack to be bonded together, effectively to prevent in desulphurization system acid and flue gas to the corrosion of chimney, especially antagonism hydrofluoric acid corrosive nature is strengthened, the shortcoming of the current domestic similar chimney anticorrosion material of effective improvement not hydrofluoric acid corrosion resistance, and price is lower than same kind of products at abroad.Meanwhile, the elasticity variation with temperature of this dope adhesive layer and produce deformation, thus avoid the destruction that occurs that stress causes corrosion protection system.
Accompanying drawing explanation
Fig. 1 is anticorrosion front chimney structure schematic diagram.
Fig. 2 is funnel body anticorrosive coat floor map of the present invention.
Fig. 3 is funnel body anticorrosive coat section plan of the present invention.
Wherein, 1-chimney shaft reinforced concrete parietal layer, 2-heat insulation layer, 3-acidproof brick inner liner, the fast dry mortar repair layer of 4-, 5-priming coat, 6-dope adhesive layer, the anticorrosion vitrified tile of 7-lightweight.
Detailed description of the invention
Below the specific embodiment of the present invention is described in detail, so that understand the present invention further.
Fig. 1 is anticorrosion front chimney structure schematic diagram.As shown in the figure, chimney is generally followed successively by from outside to inside: chimney shaft reinforced concrete parietal layer 1, heat insulation layer 2 and acidproof brick inner liner 3.Fig. 2 is funnel body anticorrosive coat floor map of the present invention.As shown in Figure 2, the present invention, on the basis of Fig. 1 chimney, removes heat insulation layer 2 and acidproof brick inner liner 3, increases the anticorrosion vitrified tile 7 of fast dry mortar repair layer 4, priming coat 5, dope adhesive layer 6 and lightweight after removing.Specifically, chimney of the present invention is followed successively by from outside to inside: chimney shaft reinforced concrete parietal layer 1, the fast anticorrosion vitrified tile 7 of dry mortar repair layer 4, priming coat 5, dope adhesive layer 6 and lightweight.
Priming coat 5 is the special primary coat of happy haze that Beijing Kai Lan Yifang Technology Co., Ltd. produces.This priming coat 5 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 epoxy resin modified organosilicon resin.This material has excellent antiacid, alkali resistant, temperature resistance and becomes and closed performance, superpower adhesive property, is applicable to the anti-corrosion material of facility and the confining bed of base material under the special environment of coal-burning power plant.
Dope adhesive layer 6 is the happy haze dope stick that Beijing Kai Lan Yifang Technology Co., Ltd. produces.Dope stick 6 is the anticorrosion special asphalt modification polyurethane adhesive of Wet chimney.It plays crucial antisepsis 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 destroy, the intensity of loss is made up, thus extends the service life of this kind of material under acid corrosion environment; The corrosion of certain density hydrofluoric acid (HF) can be resisted; There is lower vapor pervious rate, chimney is in operation under positive pressure state when normal operation, although pressure is little, the impact of its corrosiveness on chimney is very large, flue gas and acid solution can be made through liner tile and acidproof adhesive film, and this feature requires that glued membrane must have low water vapor transmittance.
The antiseptic property of above-mentioned dope stick 6 is better than domestic adhesive, and price is lower than the suitable external product of performance, and Adhensive performance is compared as follows shown in table 1:
Table 1
Table 2
Dope stick of the present invention soak test result in mixed acid
From table 1 and table 2, domestic organic silica gel lengthens in time and falls slag, thinning gradually in experimentation, and when 10 days, hot strength has decayed to 20% of ortho states, presents broken shape after 20 days, cannot 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, spline local has produced perfoliate hole.
Dope stick 6 decay resistance is significantly better than domestic organic silica gel, soaks color do not become through 50 days, 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 anticorrosion vitrified tile of lightweight 7 is anticorrosion vitrified tiles of happy haze lightweight that Beijing Kai Lan Yifang Technology Co., Ltd. produces.It take mineral as raw material, add appropriate, a large amount of gas to be produced at a certain temperature, there is the mixture of the host mineral of expansion character, pass through optimization of C/C composites, adjustment acid number coefficient, grain composition, take reasonably mixing, shaping, method for cooking, Optimizing Process Parameters, make raw material under the effect of inorganic compounding mineralizer, produce the larger glassy phase of viscosity, the bubble of remaining silent evenly gathered is formed with a large amount of gases that host mineral is released, by cooling, processing, make bulk density little, thermal conductivity factor 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 is the high-performance light vitreous Ceramic Tiles that can use for a long time in adverse circumstances.
The old chimney of prior art, do not design by wet flue gas emission request during its design, wet flue gas causes burn into destroy to chimney acidproof brick inner liner 3 and heat insulation layer 2, acid solution or infiltrated into heat insulation layer 2, before anticorrosion, structure detection is carried out to chimney, the acidproof brick liner 3 and heat insulation layer 2 that can not meet chimney security of operation is removed.
The anticorrosion substrate of removing after acidproof brick liner 3 and heat insulation layer 2 is a chimney shaft reinforced concrete ancient piece of jade, round, flat and with a hole in its centre; the fast dry mortar 4 in reinforced concrete ancient piece of jade, round, flat and with a hole in its centre substrate irregular out-of-flatness position is repaired; guarantee substrate is smooth; avoid follow-up primary coat brushing vitrified tile that is uneven and that cause because of substrate out-of-flatness to paste not plane, affect overall antiseptic effect.Fast dry mortar semi-finals degree grade >=C40, meets chimney reinforced concrete ancient piece of jade, round, flat and with a hole in its centre requirement of strength; Rate of drying is fast, does not produce crack after sclerosis, has better cracking resistance impervious.
The present invention is based on above-mentioned existing old chimney, propose the preparation method of the corrosion protection system after a kind of reinforced concrete single-tube chimney wet desulphurization on this basis, comprise the following steps:
(1) chimney acidproof brick inner liner 3 and heat insulation layer 2 is removed.
(2) repair the fast dry mortar in cast concrete base irregular out-of-flatness position, depth of plastering is 2-3mm, ensures that substrate is smooth.
(3) substrate cleaning qualified after, to inner wall of stack carry out happy haze special bottom be coated with construction, coating thickness >=0.1mm.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, avoid causing holiday or brush blocked up, brush unequal.
(4) happy haze dope stick is stirred, be coated with at the special primed surface of happy haze and scrape the primer that a layer thickness is about about 1-2mm, be coated with and scrape even full no sag.
(5) paste the anticorrosion vitrified tile of happy haze lightweight, the face to be contacted of the Ceramic Tiles of carrying out installing is smeared one deck 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, does not stay gap.Between brick and brick, circumferential weld is connection seam, and longitudinal joint answers the fissure of displacement to arrange.Fissure of displacement width be brick wide 1/2, minimumly must not be less than 1/3.
Happy haze chimney anticorrosion system carries out anticorrosive construction when ensureing chimney structure safety, by being optimized the adhesive in corrosion protection system, (happy haze adhesive strengthens antagonism hydrofluoric acid corrosive nature, the anticorrosion adhesive stretch variation with temperature of happy haze and produce deformation), thus avoid the destruction that occurs that stress causes corrosion protection system.The shortcoming of the current domestic similar chimney anticorrosion material of effective improvement not hydrofluoric acid corrosion resistance, and price is lower than same kind of products at abroad.
Although the present invention with embodiment openly as above; so it is not intended to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; all can do various different selection and amendment, therefore protection scope of the present invention limited by claims and equivalents thereof.
Claims (10)
1. the corrosion protection system of a traditional single-drum chimney wet desulphurization rear inner lining dismounting; comprise chimney shaft reinforced concrete parietal layer (1); it is characterized in that, described corrosion protection system also comprises: be coated in the fast dry mortar repair layer (4) on described chimney shaft reinforced concrete parietal layer (1) inwall, the priming coat (5) be coated on described fast dry mortar repair layer (4) inwall, be coated in the dope adhesive layer (6) on described priming coat (5) inwall and be coated in the anticorrosion vitrified tile of lightweight (7) on described dope adhesive layer (6) inwall.
2. the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting according to claim 1, it is characterized in that, described priming coat (5) be with epoxy resin modified organosilicon resin for film forming binder, add heat-resisting color stuffing, additive processing preparation bi-component Heat and corrosion resistant coating layer.
3. the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting according to claim 1, it is characterized in that, described dope adhesive layer (6) is asphalt modification polyurethane adhesive layer.
4. the corrosion protection system removed of traditional single-drum chimney wet desulphurization rear inner lining according to claim 1, is characterized in that, the anticorrosion vitrified tile of described lightweight (7) take mineral as foamed glass brick or the Ceramic Tiles of raw material.
5. the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting according to claim 1, it is characterized in that, the thickness of described fast dry mortar repair layer (4) is 2-3mm.
6. the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting according to claim 3, is characterized in that, the thickness >=0.1mm of described priming coat (5).
7. the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting according to claim 3, it is characterized in that, the coating method of described priming coat (5) is roller coating.
8. a preparation method for the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting, it is characterized in that, described preparation method comprises the following steps:
(1) chimney acidproof brick inner liner (3) and heat insulation layer (2) is removed;
(2) repair the fast dry mortar in cast concrete base irregular out-of-flatness position, depth of plastering is 2-3mm, forms fast dry mortar repair layer (4);
(3) after substrate cleaning, at the priming coat (5) of fast dry mortar repair layer (4) inwall roller coating a layer thickness >=0.1mm;
(4) dope stick (6) is stirred, be coated with on priming coat (5) surface and scrape the thick dope stick (6) of one deck 1-2mm as primer, be coated with and scrape even full no sag;
(5) the thick dope stick (6) of one deck 1-2mm is smeared in the face to be contacted of the anticorrosion vitrified tile of lightweight (7) carrying out installing, paste the anticorrosion vitrified tile of lightweight (7), glue-line gross thickness 2-4mm.
9. the traditional single-drum chimney wet desulphurization rear inner lining according to claim 8 preparation method of corrosion protection system of removing, is characterized in that, between every two adjacent anticorrosion vitrified tiles of lightweight (7), circumferential weld is connection seam, and the longitudinal joint fissure of displacement arranges.
10. the preparation method of the corrosion protection system of traditional single-drum chimney wet desulphurization rear inner lining dismounting according to claim 9, it is characterized in that, described fissure of displacement width is the 1/3-1/2 of the anticorrosion vitrified tile of described lightweight (7) width.
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|---|---|---|---|
| CN201610019395.9A CN105509078A (en) | 2016-01-13 | 2016-01-13 | Anticorrosion system for detaching lining after wet desulfuration of traditional single-tube chimney and manufacturing method |
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| CN201610019395.9A CN105509078A (en) | 2016-01-13 | 2016-01-13 | Anticorrosion system for detaching lining after wet desulfuration of traditional single-tube chimney and manufacturing method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201885245U (en) * | 2010-11-25 | 2011-06-29 | 北京恺岚一方科技发展有限公司 | Corrosion-resistant system of reinforced concrete single-drum chimney after wet desulphurization |
| CN202485014U (en) * | 2012-02-09 | 2012-10-10 | 北京恺岚一方科技发展有限公司 | Anti-corrosion system for newly constructed single-barrel chimney through wet desulphurization in thermal power plant |
| CN202485015U (en) * | 2012-02-09 | 2012-10-10 | 北京恺岚一方科技发展有限公司 | Wet desulphurization anti-corrosion system of improved single-tube chimney of thermal power plant |
| CN103335323A (en) * | 2013-03-28 | 2013-10-02 | 北京恺岚一方科技发展有限公司 | Measuring method of corrosion degree of desulfuration flue gas to chimney |
| CN205332249U (en) * | 2016-01-13 | 2016-06-22 | 北京恺岚一方科技发展有限公司 | Corrosion control system that inside lining was demolishd behind single chimney wet flue gas desulfurization of tradition |
-
2016
- 2016-01-13 CN CN201610019395.9A patent/CN105509078A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201885245U (en) * | 2010-11-25 | 2011-06-29 | 北京恺岚一方科技发展有限公司 | Corrosion-resistant system of reinforced concrete single-drum chimney after wet desulphurization |
| CN202485014U (en) * | 2012-02-09 | 2012-10-10 | 北京恺岚一方科技发展有限公司 | Anti-corrosion system for newly constructed single-barrel chimney through wet desulphurization in thermal power plant |
| CN202485015U (en) * | 2012-02-09 | 2012-10-10 | 北京恺岚一方科技发展有限公司 | Wet desulphurization anti-corrosion system of improved single-tube chimney of thermal power plant |
| CN103335323A (en) * | 2013-03-28 | 2013-10-02 | 北京恺岚一方科技发展有限公司 | Measuring method of corrosion degree of desulfuration flue gas to chimney |
| CN205332249U (en) * | 2016-01-13 | 2016-06-22 | 北京恺岚一方科技发展有限公司 | Corrosion control system that inside lining was demolishd behind single chimney wet flue gas desulfurization of tradition |
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