CN103331084A - Restoration method for damageable stress area of desulfurization tower lining - Google Patents
Restoration method for damageable stress area of desulfurization tower lining Download PDFInfo
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- CN103331084A CN103331084A CN2013100417405A CN201310041740A CN103331084A CN 103331084 A CN103331084 A CN 103331084A CN 2013100417405 A CN2013100417405 A CN 2013100417405A CN 201310041740 A CN201310041740 A CN 201310041740A CN 103331084 A CN103331084 A CN 103331084A
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Abstract
The invention discloses a restoration method for a damageable stress area of a desulfurization tower lining. The method comprises steps of (1) polishing the damaged lining area to be smooth, and cleaning with a solvent; (2) coating the damaged lining area with glue, pasting a fiber lining material, coating with the glue a second time, pasting the fiber lining material a second time, and coating with the glue a third time; and (3) twelve hours later, polishing and cleaning deckle edges, wrapped bubbles and foreign materials of fiber cloth or felt, and coating with a wearing layer and a finishing coat. An anticorrosive wear-resistant lining prepared by the method has characteristics of corrosion resistance, erosion resistance and wear resistance. The anticorrosive wear-resistant lining can be used for a long time in hostile corrosive environments such as the specific corrosive environment of ammonia-method desulfurization towers, and therefore a problem of corrosion and perforation is effectively solved. The method has advantages of simple technology, low investment, maintenance convenience and long service lifetime. For example, the ammonia-method desulfurization towers at present generally use glass flakes as linings for anticorrosion and the service cycle of the glass flakes is 1-3 months in general, while the anticorrosive wear-resisting lining provided by the invention has been used over 9 months.
Description
Technical field
The present invention relates to a kind of desulfurizing tower anticorrosion antiwear lining restorative procedure, belong to chemical field.
Background technology
Flue gas desulfurization is to control sulfur dioxide pollution at present in the world, prevents and treats the major technique approach of acid rain harm, and the ammonia process of desulfurization is the trend of world FGD development, widespread usage and chemical industry field.The ammonia process of desulfurization absorbs SO in the flue gas with ammonia
2, with pollutant SO
2Recovery becomes the commercial prod sulphur ammonium of high added value, and the sulphur ammonium is a kind of nitrogenous fertilizer of function admirable, has good market prospects in China.Make desulfurizing agent if produce deposed ammonia in enterprise's employing production of synthetic ammonia, will more meet recycling economy and energy-conservation requirement, can declare National Development and Reform Committee's special fund and reward.
Domestic research to flue gas desulfurization technique mainly concentrates in the research of sulfur method, technological design and system optimization at present, also be not able to do in time systematic research work is carried out in the operating corrosion of desulphurization system and wear problem, along with putting into operation of large quantities of desulfurizers, its corrosion has more and more caused people's attention with wear problem, and related scientific research and technical staff also are being devoted to seek more effective anticorrosion and anti-wearing method.
Ammonia process of desulfurization tower enriching section is the worst position of whole desulphurization system corrosive environment at present, it is anticorrosion that this position adopts carbon steel to make the glass flake lining more, because the strong content height of ammonium sulfate solution corrosivity, serious to the lining erosive wear, physics and chemical attack combine, frequently cause lining damage, the perforation of tower wall and inner support damage etc., especially the stressed zone of rapid wear is easier is corroded.The general desulfurization operation cycle is 1～3 month, and the maintenance of stopping frequently causes the consumption of manpower and material etc., and maintenance cost is seriously higher, and does not meet device safety and environmental protection long-term operation.Therefore need to seek a kind of new restorative procedure to the rapid wear stressed zone, make the lining rapid wear stressed zone after the reparation have good resistance acid and alkali corrosion and wear-resisting effect, reduce down time, prolong the cycle of operation.
Summary of the invention
Purpose of the present invention provides a kind of desulfurizing tower enriching section lining rapid wear stressed zone restorative procedure, solves short problem in desulfurizing tower rapid wear stressed zone service life.
For achieving the above object, method of the present invention may further comprise the steps:
Vulnerable zone of the present invention is area of stress concentration, deformation sensitizing range and lining force area.Restorative procedure of the present invention is the local restorative procedure that strengthens.
(1) the affected area liner surface is polished flat, clean with solvent clean.
Described solvent is: the epoxy type clay with acetone or alcohol as solvent; Polyester-type or vinyl esters type clay use styrene as solvent.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is epoxy type rubber cement, polyester-type rubber cement or vinyl esters type rubber cement; Be preferably vinyl glass flake rubber cement.
Described reinforcing fiber materials is selected non-paraffin wax emulsions type for use, and glass cloth, thick fine felt or the surperficial felt of surface treated middle alkali or alkali-free glass fibre making.
Selected reinforcing fiber materials thickness 0.2mm, the longitude and latitude of all kinds of fiber cloth props up yarn density 8 * 8, and weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) enhancement layer (or fibrage) area coverage is that yin, yang angle periphery extends 150mm.
Full structure enhancement layer (or fibrage) is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely enhancement layer (or fibrage) is implemented in bolted district and internals gravity active region.
Preferably, reparation of the present invention is at 5～30 ℃, and relative humidity should be lower than carries out under 85% the condition.
Preferred, 10～30 ℃ of epoxy type clay construction temperatures; 5～30 ℃ of polyester or vinyl esters type clay construction temperatures.
Further preferred, construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
That the anticorrosion antiwear lining of method of the present invention preparation has is corrosion-resistant, erosion resistance, wear-resisting characteristic, can be under extremely abominable corrosive environment, as the distinctive corrosive environment of ammonia process of desulfurization tower, the long-term use, can effectively solve the corrosion failure problem, this method technology is simple, small investment, easy to maintenance, the life-span is long.As present ammonia process of desulfurization tower lining generally adopts the anticorrosion life cycle of glass flake 1～3 month, anticorrosion antiwear layer of the present invention used more than 9 months.
The specific embodiment
By following examples the present invention is described in further details, following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment 1
(1) the affected area liner surface is polished flat, clean up with acetone.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is the epoxy type rubber cement; Described fibrous material is selected non-paraffin wax emulsions type for use, and glass cloth, the weak point of surface treated middle alkali or alkali-free glass fibre making are cut felt or surperficial felt.
Selected reinforcing fiber materials thickness 0.1mm, it is 8 * 8 that the longitude and latitude of described fiber props up yarn density; Described weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) enhancement layer area coverage is that yin, yang angle periphery extends 150mm; Full structure enhancement layer is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely the fibre structure enhancing should be implemented in bolted district and internals gravity active region.
Reparation of the present invention is at 30 ℃, and relative humidity should be lower than carries out under 85% the condition.Construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
Embodiment 2
(1) the affected area liner surface is polished flat, clean with alcohol wash.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is the polyester-type rubber cement; Described fibrous material is selected non-paraffin wax emulsions type for use, and glass cloth, the weak point of surface treated middle alkali or alkali-free glass fibre making are cut felt or surperficial felt.
Selected fibrous material thickness 0.2mm, it is 8 * 8 that the longitude and latitude of described fiber props up yarn density; Described weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) enhancement layer area coverage is that yin, yang angle periphery extends 150mm; Full structure enhancement layer is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely the fibre structure enhancing should be implemented in bolted district and internals gravity active region.
Reparation of the present invention is at 10 ℃, and relative humidity should be lower than carries out under 85% the condition.Construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
Embodiment 3
(1) the affected area liner surface is polished flat, clean with alcohol wash.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is the epoxy type rubber cement; Described fibrous material is selected non-paraffin wax emulsions type for use, and glass cloth, the weak point of surface treated middle alkali or alkali-free glass fibre making are cut felt or surperficial felt.
Selected reinforcing fiber materials thickness 0.15mm, it is 8 * 8 that the longitude and latitude of described fiber props up yarn density; Described weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) enhancement layer area coverage is that yin, yang angle periphery extends 150mm; Full structure enhancement layer is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely the fibre structure enhancing should be implemented in bolted district and internals gravity active region.
Reparation of the present invention is at 20 ℃, and relative humidity should be lower than carries out under 85% the condition.Construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
Embodiment 4
(1) the affected area liner surface is polished flat, clean up with styrene.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is vinyl esters type rubber cement.Described fibrous material is selected non-paraffin wax emulsions type for use, and glass cloth, the weak point of surface treated middle alkali or alkali-free glass fibre making are cut felt or surperficial felt.
Selected fibrous material thickness 0.2mm, it is 8 * 8 that the longitude and latitude of described fiber props up yarn density; Described weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) enhancement layer area coverage is that yin, yang angle periphery extends 150mm; Full structure enhancement layer is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely the fibre structure enhancing should be implemented in bolted district and internals gravity active region.
Reparation of the present invention is at 5 ℃, and relative humidity should be lower than carries out under 85% the condition.Construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
Embodiment 5
(1) the affected area liner surface is polished flat, clean up with styrene.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is vinyl glass flake rubber cement.Described fibrous material is selected non-paraffin wax emulsions type for use, and glass cloth, the weak point of surface treated middle alkali or alkali-free glass fibre making are cut felt or surperficial felt.
Selected fibrous material thickness 0.2mm, it is 8 * 8 that the longitude and latitude of described fiber props up yarn density; Described weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) enhancement layer area coverage is that yin, yang angle periphery extends 150mm; Full structure enhancement layer is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely the fibre structure enhancing should be implemented in bolted district and internals gravity active region.
Reparation of the present invention is at 30 ℃, and relative humidity should be lower than carries out under 85% the condition.Construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
Embodiment 6
(1) the affected area liner surface is polished flat, clean up with styrene.
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement, paste the lining fibrofelt, be coated with rubber cement, be i.e. two linings, three glue.
Described rubber cement is vinyl glass flake rubber cement.Described fibrous material is selected non-paraffin wax emulsions type for use, and glass cloth, the weak point of surface treated middle alkali or alkali-free glass fibre making are cut felt or surperficial felt.
Selected reinforcing fiber materials thickness 0.15mm, it is 8 * 8 that the longitude and latitude of described fiber props up yarn density; Described weak point is cut the felt specification and is selected 300g/ ㎡; Surface felt specification is selected 30g/ ㎡.
After (3) 12 hours, should be with the burr of fiber cloth (or felt), wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
Described area of stress concentration (being equipment yin, yang angular region) fibrage area coverage is that yin, yang angle periphery extends 150mm; Full structure enhancement layer is implemented in described deformation sensitizing range (as the internals brace summer); Described lining force area, namely the fibre structure enhancing should be implemented in bolted district and internals gravity active region.
Reparation of the present invention is at 15 ℃, and relative humidity should be lower than carries out under 85% the condition.Construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
Claims (10)
1. a desulfurizing tower lining rapid wear stressed zone restorative procedure comprises the steps:
(1) the affected area liner surface is polished flat, clean with solvent clean;
(2) be coated with rubber cement, paste the lining fibrous material, be coated with rubber cement again, paste the lining fibrous material again, be coated with rubber cement again;
After (3) 12 hours, should be with the burr of fiber cloth or felt, wrap bubble and the polishing of silk ribbon foreign material and remove totally, brush wearing layer and finish paint, namely.
2. restorative procedure according to claim 1 is characterized in that, the described solvent of step (1) is: the epoxy type clay with acetone or alcohol as solvent; Polyester-type or vinyl esters type clay use styrene as solvent.
3. restorative procedure according to claim 1 and 2 is characterized in that, the described rubber cement of step (2) is epoxy type rubber cement, polyester-type rubber cement or vinyl esters type rubber cement.
4. restorative procedure according to claim 3 is characterized in that, described rubber cement is vinyl glass flake rubber cement.
5. restorative procedure according to claim 1 is characterized in that, the described fibrous material of step (2) is selected non-paraffin wax emulsions type for use, and glass cloth, thick fine felt or the surperficial felt of surface treated middle alkali or alkali-free glass fibre making.
6. according to the described restorative procedure of the arbitrary claim of claim 1-5, it is characterized in that described fibrous material thickness is 0.2mm, it is 8 * 8 that the longitude and latitude of fiber cloth props up yarn density, and weak point is cut the felt specification and selected 300g/ ㎡, and surperficial felt specification is selected 30g/ ㎡.
7. according to the described restorative procedure of the arbitrary claim of claim 1-6, it is characterized in that described vulnerable zone is area of stress concentration, deformation sensitizing range or lining force area.
8. according to the described restorative procedure of the arbitrary claim of claim 1-7, it is characterized in that described area of stress concentration fiber-covered area is that negative and positive angle periphery extends 150mm.
9. according to the described restorative procedure of the arbitrary claim of claim 1-8, it is characterized in that full structure enhancement layer is implemented in described deformation sensitizing range.
10. according to the described restorative procedure of the arbitrary claim of claim 1-9, it is characterized in that described reparation is at 5～30 ℃, relative humidity should be lower than carries out under 85% the condition; Preferred, epoxy type clay construction temperature is 10～30 ℃; Polyester or vinyl esters type clay construction temperature are 5～30 ℃; Further preferred, construction matrix surface temperature is higher than 3 ℃ of environment temperatures.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100417405A CN103331084A (en) | 2013-02-04 | 2013-02-04 | Restoration method for damageable stress area of desulfurization tower lining |
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|---|---|---|---|
| CN2013100417405A CN103331084A (en) | 2013-02-04 | 2013-02-04 | Restoration method for damageable stress area of desulfurization tower lining |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107224858A (en) * | 2016-03-23 | 2017-10-03 | 上海建冶科技工程股份有限公司 | The wear-and corrosion-resistant technique of wet desulphurization equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785901A (en) * | 1996-06-04 | 1998-07-28 | Mitsubishi Heavy Industries, Ltd. | Gas-liquid contact apparatus |
| CN202647810U (en) * | 2012-05-28 | 2013-01-02 | 武汉博奇环保科技股份有限公司 | Corrosion-proof desulfurization chimney |
-
2013
- 2013-02-04 CN CN2013100417405A patent/CN103331084A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785901A (en) * | 1996-06-04 | 1998-07-28 | Mitsubishi Heavy Industries, Ltd. | Gas-liquid contact apparatus |
| CN202647810U (en) * | 2012-05-28 | 2013-01-02 | 武汉博奇环保科技股份有限公司 | Corrosion-proof desulfurization chimney |
Non-Patent Citations (1)
| Title |
|---|
| 国家发展和改革委员会: "《中华人民共和国化工行业标准》", 26 October 1994, article "玻璃鳞片衬里施工技术条件" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107224858A (en) * | 2016-03-23 | 2017-10-03 | 上海建冶科技工程股份有限公司 | The wear-and corrosion-resistant technique of wet desulphurization equipment |
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Application publication date: 20131002 |