CN108097007A - Ammonia desulfurizing process inside lining anti-corrosive technology - Google Patents
Ammonia desulfurizing process inside lining anti-corrosive technology Download PDFInfo
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- CN108097007A CN108097007A CN201711182868.8A CN201711182868A CN108097007A CN 108097007 A CN108097007 A CN 108097007A CN 201711182868 A CN201711182868 A CN 201711182868A CN 108097007 A CN108097007 A CN 108097007A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of ammonia desulfurizing process inside lining anti-corrosive technologies, comprise the following steps：Transverse direction is carried out to the liner in desulfurizing tower, is longitudinally continuous welding, and polishing ensures the smooth surface that connects；The turning of all liners and edge processing are in the arc-shaped；It carries out blasting treatment, primary coat processing successively to the surface of liner, smear putty, preservative treatment and Wear-resistant Treatment.The present invention provides aseptic technic and is easily achieved, favorable anti-corrosion effect；Vinylite and flake mortar have preferable soluble, and increase and have glass fabric, be effectively increased the overall performance and intensity of the vertical and horizontal of liner so that the inner wall of desulfurizing tower, all crossbeams, inlet and outlet flue inner wall and it is all enter hole, pipeline inlet and outlet flange be connected structure, good integrity, it is not easily to fall off, from the whole comprehensive performance for improving desulfurizing tower, stable quality, high temperature resistant, corrosion-resistant, cold-and-heat resistent stress impact, leakage is less prone to for a long time, greatly prolongs service life.
Description
Technical field
The invention belongs to desulfurizing tower inside lining anti-corrosive technical fields, and in particular to a kind of ammonia desulfurizing process inside lining anti-corrosive skill
Art.
Background technology
In order to preferably administer haze weather flue gas desulfurization, denitration are being actively promoted to pollution, every profession and trade caused by environment
Equipment is installed and used.But desulphurization and denitration equipment generally existing equipment quality in construction and operation is low at present, equipment
Operation ratio is low, not anti-corrosion, the problems such as equipment service life is short.
The coagulation that flue gas is formed in equipment inner lining surface has very strong aggressivity, and mainly hardware is damaged
Corrosion, according to developed country's investigation statistics in the world, every year since economic loss caused by metal erosion is up to 40,000,000,000 yuan or more,
Therefore the anti-corrosion of the materials such as flue gas desulfurization and denitrification equipment metal is most important.In addition, flue gas difference variation is big, after desulphurization and denitration
Flue-gas temperature between 40 DEG C -80 DEG C, but desulphurization and denitration system overhaul or do not run and under unit operation operating mode, flue gas
Temperature is between 130 DEG C -180 DEG C, therefore desulphurization denitration equipment liner has the ability of Anti-temperature difference variation, frequent in temperature change
Environment in do not crack, it is impossible to generate subtle crack, so as not to flue gas penetrate into in equipment generate corrosion.
There are certain defects and deficiency for anti-corrosion of traditional anti-corrosion material to flue gas desulfurization device：
1. the anti-corrosion material of the resin glass fibre reinforced plastics such as epoxy, phenolic aldehyde, unsaturated polyester series, inner surface is smooth, not incrustation, but
It is to have alkaline-resisting not acidproof, what is had is acidproof not alkaline-resisting, and long-term temperature tolerance is poor, not ageing-resistant.
2. stainless steel anti-corrosion material：High temperature resistant, acid-fast alkali-proof is good, surface is smooth, resistance is small, shock resistance, but weld seam
Easy burn into does not allow easily molded and cost high.
3. glass flakes anti-corrosion material：Its temperature tolerance acid resistance is fabulous, hardness is high, but poor adhesive force, easily de- in flakes
Fall.
Glass flake is used primarily for desulfurizing tower anti-corrosion, is because its is corrosion-resistant, and has certain wear-resisting functions, and takes off at present
Sulphur tower is mostly using desulfurization by lime gypsum method, and the particulate matter in slurries is relatively more, glass squama serious to desulfurizing tower inner wall abrasion
Piece erosion resistant coating is through can't stand this wash away, it is easy to wear；General Life, which does not exceed 2 years, is just present with abrasion, and causes to take off
Sulphur tower wall burn into is damaged, is unable to operate normally steam generator system.
4. acid resistant adhesive mortar material：Temperature tolerance and acid resistance are good, have that certain adhesive force, service life are long, but waterproof
Moisture resistance is poor, and alkali resistance is poor, and the moisture for easily absorbing flue gas causes powder of detached, extremely cold very hot easily to crack.
To sum up, it is badly in need of developing a kind of ammonia desulfurizing process inside lining anti-corrosive technology at present.
The content of the invention
For above-mentioned deficiency, present invention aims at, one kind is provided and is easily achieved, the ammonia process of desulfurization work of favorable anti-corrosion effect
Skill inside lining anti-corrosive technology.
To achieve the above object, technical solution provided by the present invention is：
A kind of ammonia desulfurizing process inside lining anti-corrosive technology, comprises the following steps：
(1) transverse direction is carried out to the liner in desulfurizing tower, is longitudinally continuous welding, and polishing ensures the smooth surface that connects；It is all
The turning of liner and edge processing are in the arc-shaped；
(2) blasting treatment is carried out to the surface of liner；
(3) primary coat processing is carried out to the surface of liner, is uniformly brushed with hair rolling or hairbrush；
(4) vinylite and talcum powder are pressed 1:3 ratio of weight and number is mixed into putty, and putty is applied to desulfurizing tower
Interior welding point and the uneven place of weld seam, uniformly smear into burnishing surface or arcwall face；
(5) vinylite and flake mortar are pressed 10:1~3 ratio of weight and number is mixed into lining material, by curing agent
3 are pressed with accelerating agent:1~5 ratio of weight and number is mixed to form blender；Will lining material and blender reconcile after with mixer into
Row sufficiently stirs evenly that form preservation blends for use；
(6) preservation blends is rolled uniformly to brush with hair and forms mixture coating in interior lining, glass fabric is tiled
It on mixture coating, then is rolled with hair and preservation blends brushing is formed mixture coating on glass fabric, then with modeling
Expect scraper plate the removal of bubbles in glass fabric；Then another glass fabric is laid on mixture coating again, then used
Mixture brushing is formed mixture coating by hair rolling on glass fabric, is so repeated 3~6 times, is formed thickness be 1.8~
The erosion resistant coating of 2.2mm；
(7) wearing layer is coated on erosion resistant coating.
As a modification of the present invention, when step (2) sandblasting, ensures that relative humidity is not more than 85%；Blast media
For quartz sand, pressure control reaches Sa2.5 grades in 0.6~1Mpa grades of sandblastings, sandblasting.
As a modification of the present invention, the step (7) specifically includes following steps：By vinylite and carborundum
Powder is according to 10:1~3 ratio of weight and number is mixed into wear-resistant material, and curing agent and accelerating agent are pressed 3:1~3 ratio of weight and number
It is mixed to form blender；It carries out sufficiently stirring evenly to form wear-resisting mixing with mixer after wear-resistant material and blender are reconciled
Abrasion resistant mixture is coated on erosion resistant coating and forms wearing layer by object.
As a modification of the present invention, the step (7) specifically includes following steps：By vinylite and diamond dust
Powder is according to 10:1~3 ratio of weight and number is mixed into wear-resistant material, and curing agent and accelerating agent are pressed 3:1~3 ratio of weight and number
It is mixed to form blender；It carries out sufficiently stirring evenly to form wear-resisting mixing with mixer after wear-resistant material and blender are reconciled
Abrasion resistant mixture is coated on erosion resistant coating and forms wearing layer by object.
As a modification of the present invention, the step (7) specifically includes following steps：By vinylite and Brown Alundum
Powder is according to 10:1~3 ratio of weight and number is mixed into wear-resistant material, and curing agent and accelerating agent are pressed 3:1~3 ratio of weight and number
It is mixed to form blender；It carries out sufficiently stirring evenly to form wear-resisting mixing with mixer after wear-resistant material and blender are reconciled
Abrasion resistant mixture is coated on erosion resistant coating and forms wearing layer by object.
As a modification of the present invention, the glass fabric be platinum that specification is 900 × 0.5 or 900 × 0.3 without
Alkali containing glass fibre cloth.
As a modification of the present invention, the vinylite is FUCHEM850.
As a modification of the present invention, the flake mortar is VEGF-1 high-temperature scales clay or VEGF-2 medium temperature scales
Clay
It is a kind of to implement the above-mentioned ammonia desulfurizing process inside lining anti-corrosive technology of right, including a tower body, it is equipped in tower body interior
Lining, the interior lining are sequentially coated with blasting treatment layer, primary coat process layer, putty layer, erosion resistant coating and resistance to by order from the inside to the outside
Grind layer.
Beneficial effects of the present invention are：The present invention provides aseptic technic and is easily achieved, favorable anti-corrosion effect；Vinylite and
Flake mortar has preferable soluble, and increases and has glass fabric, is effectively increased the globality of the vertical and horizontal of liner
Energy and intensity；So that the inner wall of desulfurizing tower, all crossbeams, inlet and outlet flue inner wall and it is all enter hole, pipeline inlet and outlet flange
Be connected structure, and good integrity is not easily to fall off, and from the whole comprehensive performance for improving desulfurizing tower, stable quality is high temperature resistant, resistance to
Burn into cold-and-heat resistent stress impact, is less prone to leakage, greatly prolongs service life for a long time.Glass flake technique does not possess so
Overall performance.Glass flake technique even comes off as long as there is slight deformation at anti-corrosion position, and desulfurization tower body burn into is caused to damage
It is bad.
With reference to embodiment, the invention will be further described.
Specific embodiment
Embodiment：A kind of ammonia desulfurizing process inside lining anti-corrosive technology provided in this embodiment, comprises the following steps：
(1) transverse direction is carried out to the liner in desulfurizing tower, is longitudinally continuous welding, and polishing ensures the smooth surface that connects；Surface
Weld defect (such as crack, recess) is filled up by welding again, keeps smooth with neighbouring surface.Remove all welderings on surface
Slag by the way of cutting, is finally polishing to smooth.All inside and outside reinforcing members, support etc. all should be before lining processing starts
It is welded to tower wall.Provisional support or hanging ring etc. are removed before construction, and the region is polished smoothly.All liners turn
Angle and edge processing are in the arc-shaped；
(2) blasting treatment is carried out to the surface of liner；Ensure that relative humidity is not more than 85% during step (2) sandblasting；
Blast media is quartz sand, and pressure control reaches Sa2.5 grades in 0.6~1Mpa grades of sandblastings, sandblasting；Neighbouring surface oneself brushed primary coat
When, near zone cannot carry out sandblasting, until tack-free until the region of brush primary coat.It to be cleaned after sandblasting, fully be removed
Dust；
(3) primary coat processing is carried out to the surface of liner, is uniformly brushed with hair rolling or hairbrush；During specific primary coat processing,
It need to be made a decision according to Various Seasonal weather condition, in summer rainy weather, it is necessary to sandblasting face be cleaned up before raining, in time
Round brush primary coat prevents from drenching with rain and get rusty, and in the event of surface oxidisation, region of getting rusty should be according to requirements above again sandblasting；Spring, the autumn,
In three season of winter, air is relatively dry, the time interval of specific derusting by sandblasting and brush primary coat, is subject to sandblasting rear surface without floating rust；
(4) vinylite and talcum powder are pressed 1:3 ratio of weight and number is mixed into putty, and putty is applied to desulfurizing tower
Interior welding point and the uneven place of weld seam, uniformly smear into burnishing surface or arcwall face；
(5) vinylite and flake mortar are pressed 10:1~3 ratio of weight and number is mixed into lining material, by different seasons
Temperature conditions proportioning is saved, summer temperature is high, can be by 5:1 ratio of weight and number is mixed, and other seasons reduce and phase with temperature
The dosage of flake mortar should be reduced.Curing agent and accelerating agent are pressed 3:1~5 ratio of weight and number is mixed to form blender；It will lining
In material and blender reconcile after is carried out sufficient stirring evenly that form preservation blends for use with mixer；
(6) preservation blends is rolled uniformly to brush with hair and forms mixture coating in interior lining, glass fabric is tiled
It on mixture coating, then is rolled with hair and preservation blends brushing is formed mixture coating on glass fabric, then with modeling
Expect scraper plate the removal of bubbles in glass fabric；Then another glass fabric is laid on mixture coating again, then used
Mixture brushing is formed mixture coating by hair rolling on glass fabric, is so repeated 3~6 times, is formed thickness be 1.8~
The erosion resistant coating of 2.2mm；
(7) wearing layer is coated on erosion resistant coating.
Specifically, the step (7) specifically includes following steps：By vinylite and carborundum powder according to 10:1~3
Ratio of weight and number be mixed into wear-resistant material, curing agent and accelerating agent are pressed 3:1~3 ratio of weight and number is mixed to form reconciliation
Agent；It carries out sufficiently stirring evenly to form abrasion resistant mixture with mixer after wear-resistant material and blender are reconciled, it will be wear-resisting mixed
Conjunction object is coated on erosion resistant coating and forms wearing layer.In other embodiments, carborundum powder can with abrasive powder or brown alundum powder come
It replaces.Carborundum powder, abrasive powder or brown alundum powder mix in proportion with vinylite, in desulfurizing tower spray section, oxidation panel
Wearing layer is made, substitutes glass flake abrasionproof, it is with obvious effects.
Preferably, the platinum alkali-free glass fiber cloth that it is 900 × 0.5 or 900 × 0.3 that the glass fabric, which is specification,.
The vinylite is preferably FUCHEM850.The flake mortar is preferably in VEGF-1 high-temperature scales clay or VEGF-2
Warm flake mortar
It is a kind of to implement the above-mentioned ammonia desulfurizing process inside lining anti-corrosive technology of right, including a tower body, it is equipped in tower body interior
Lining, the interior lining are sequentially coated with blasting treatment layer, primary coat process layer, putty layer, erosion resistant coating and resistance to by order from the inside to the outside
Grind layer.
Following inspection and processing are carried out after processing：
1st, visual examination:Visually, finger touches the defects of inspection is confirmed without bubbling, scar, bad hardening.
2nd, earth detection:It is scanned comprehensively using high voltage low cycle electrical Spark plug optical fiber sensor instrument, voltage 6000V confirms no electric leakage.
3rd, film thickness inspection:It using electro-magnetic thickness gage, is surveyed by every 2m2 at one, confirms liner thickness.
4th, to the processing of defective work:Thickness deficiency must supply thickness；Protrusion, injurious surface mark, bubble etc., which are in, ensures thickness
Degree is polished not less than under minimum depth information with angle grinder；To electric leakage, bubbling, stripping etc., wanted after removing defect by repairing
Neck repairing.Thickness is supplied at thickness deficiency.Thickness is preferably 2mm.
The present invention provides aseptic technic and is easily achieved, favorable anti-corrosion effect；Vinylite and flake mortar have preferable
Solubility, and increase and have glass fabric, it is effectively increased the overall performance and intensity of the vertical and horizontal of liner；So that desulfurizing tower
Inner wall, all crossbeams, inlet and outlet flue inner wall and it is all enter hole, pipeline inlet and outlet flange be connected structure, globality
It is good, it is not easily to fall off, from the whole comprehensive performance for improving desulfurizing tower, stable quality, high temperature resistant, corrosion-resistant, cold-and-heat resistent stress impact,
Leakage is less prone to for a long time, greatly prolongs service life.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and changed.Therefore, the invention is not limited in specific embodiment disclosed and described above, to the present invention's
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, it although is used in this specification
Some specific terms, but these terms are merely for convenience of description, do not limit the present invention in any way.Such as the present invention
Described in above-described embodiment, using same or similar technique and anticorrosion structure, all fall in the scope of protection of the present invention.
Claims (9)
1. a kind of ammonia desulfurizing process inside lining anti-corrosive technology, which is characterized in that it comprises the following steps：
(1) transverse direction is carried out to the liner in desulfurizing tower, is longitudinally continuous welding, and polishing ensures the smooth surface that connects；All liners
Turning and edge processing it is in the arc-shaped；
(2) blasting treatment is carried out to the surface of liner；
(3) primary coat processing is carried out to the surface of liner, is uniformly brushed with hair rolling or hairbrush；
(4) vinylite and talcum powder are pressed 1:3 ratio of weight and number is mixed into putty, and putty is applied in desulfurizing tower and is welded
Contact and the uneven place of weld seam, uniformly smear into burnishing surface or arcwall face；
(5) vinylite and flake mortar are pressed 10:1~3 ratio of weight and number is mixed into lining material, by curing agent and rush
3 are pressed into agent:1~5 ratio of weight and number is mixed to form blender；It is filled after lining material and blender are reconciled with mixer
Point stir evenly that form preservation blends for use；
(6) preservation blends is rolled uniformly to brush with hair and forms mixture coating in interior lining, glass fabric is laid in mixed
It closes on object coating, then is rolled with hair and preservation blends brushing is formed mixture coating on glass fabric, then scraped with plastics
Plate is the removal of bubbles in glass fabric；Then another glass fabric is laid on mixture coating again, then is rolled with hair
Mixture brushing on glass fabric is formed mixture coating, is so repeated 3~6 times, formed thickness for 1.8~
The erosion resistant coating of 2.2mm；
(7) wearing layer is coated on erosion resistant coating.
2. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that step (2) sandblasting
When ensure relative humidity be not more than 85%；Blast media is quartz sand, and pressure control reaches in 0.6~1Mpa grades of sandblastings, sandblasting
Sa2.5 grades.
3. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that the step (7) is specific
Comprise the following steps：By vinylite and carborundum powder according to 10:1~3 ratio of weight and number is mixed into wear-resistant material, will be solid
Agent and accelerating agent press 3:1~3 ratio of weight and number is mixed to form blender；With stirring after wear-resistant material and blender are reconciled
Machine progress sufficiently stirs evenly to form abrasion resistant mixture, and abrasion resistant mixture is coated on erosion resistant coating and forms wearing layer.
4. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that the step (7) is specific
Comprise the following steps：By vinylite and abrasive powder according to 10:1~3 ratio of weight and number is mixed into wear-resistant material, will be solid
Agent and accelerating agent press 3:1~3 ratio of weight and number is mixed to form blender；With stirring after wear-resistant material and blender are reconciled
Machine progress sufficiently stirs evenly to form abrasion resistant mixture, and abrasion resistant mixture is coated on erosion resistant coating and forms wearing layer.
5. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that the step (7) is specific
Comprise the following steps：By vinylite and brown alundum powder according to 10:1~3 ratio of weight and number is mixed into wear-resistant material, will be solid
Agent and accelerating agent press 3:1~3 ratio of weight and number is mixed to form blender；With stirring after wear-resistant material and blender are reconciled
Machine progress sufficiently stirs evenly to form abrasion resistant mixture, and abrasion resistant mixture is coated on erosion resistant coating and forms wearing layer.
6. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that the glass fabric is
Specification is 900 × 0.5 or 900 × 0.3 platinum alkali-free glass fiber cloth.
7. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that the vinylite is
FUCHEM850。
8. ammonia desulfurizing process inside lining anti-corrosive technology according to claim 1, which is characterized in that the flake mortar is
VEGF-1 high-temperature scales clay or VEGF-2 medium temperature flake mortars.
9. a kind of implement ammonia desulfurizing process inside lining anti-corrosive technology described in claim 1, which is characterized in that it includes a tower
Body, tower body is interior to be equipped with liner, which is sequentially coated with blasting treatment layer, primary coat process layer, mud by order from the inside to the outside
Sublayer, erosion resistant coating and wearing layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711182868.8A CN108097007A (en) | 2017-11-23 | 2017-11-23 | Ammonia desulfurizing process inside lining anti-corrosive technology |
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| CN201711182868.8A CN108097007A (en) | 2017-11-23 | 2017-11-23 | Ammonia desulfurizing process inside lining anti-corrosive technology |
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ID=62206910
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114352846A (en) * | 2022-01-06 | 2022-04-15 | 重庆钢铁股份有限公司 | Long-life desulfurization slurry pipeline and manufacturing method thereof |
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Application publication date: 20180601 |