CN1265894C - Preservation painting process for liner of coke-oven gas clarification system device - Google Patents
Preservation painting process for liner of coke-oven gas clarification system device Download PDFInfo
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- CN1265894C CN1265894C CN 02139606 CN02139606A CN1265894C CN 1265894 C CN1265894 C CN 1265894C CN 02139606 CN02139606 CN 02139606 CN 02139606 A CN02139606 A CN 02139606A CN 1265894 C CN1265894 C CN 1265894C
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- priming coat
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The present invention discloses a corrosion preventing painting process for linings with serious corrosion in coke-oven gas purification systems, such as regeneration towers, washing towers, sulphur and benzene removing towers, washing oil tanks, tar and ammonia water tanks, etc. The present invention is characterized in that a device lining which needs corrosion prevention, namely the body surface of a steel-based plate 1, is firstly sprayed with sand or spills for a corrosion preventing treatment and is scrubbed by ethanol solvents to remove grease and dirt on the surface; YJF-1 fluororubber heavy-corrosion-preventing paint prepared by thoroughly stirring and mixing the mixture of constituents A and constituents B in the weight ratio of 5:1 is mixed with a proper quantity of special diluting agents; the mixed paint is brushed to the steel-based plate 1 for two times to form bottom painting layers 2 and the thickness of each of the bottom painting layers 2 is from 20 to 25 micrometers; likewise, the mixture of constituents A' and constituents B' in the weight ratio of 5:1 is mixed with a proper quantity of special diluting agents to form surface paint; the surface paint is brushed to the bottom painting layers 2 for 8 to 10 times to form surface painting layers 3 and the thickness of each of the surface painting layers 3 is from 15 to 25 micrometers; the surface painting layers are naturally dried and nursed for 15 days for use. The painting process can be generalized to metallurgy industry, chemical industry, etc. and can replace the traditional rubber linings and the glass steel linings of heavy-corrosion-preventing devices.
Description
Technical field
The present invention relates to a kind of new process for painting that is particularly useful for various device lining anticorrosive paint in the coal chemical enterprise coke oven gas purification system, belong to the C23F15/00 class.
Background technology
In coal chemical enterprise; coke oven gas purification is a very complicated technology; various device comprises regenerator, scrubbing tower, desulfurization debenzolizing tower, washing oil groove, tar ammonia groove and storage tank jar etc. in the gas cleaning system; the lining anti-corrosion protection of these equipment belongs to the spy and adds the intensity level anti-corrosion protection, and anti-corrosion material that is adopted and corresponding coating process are directly connected to the service life of various device in the gas cleaning system and the complexity of maintenance.Most fiberglass material or antiseptic rubber materials of adopting are as anticorrosive and corresponding anticorrosion process thereof in anticorrosion process in the past, promptly according to the internal structure shape of various device in the gas cleaning system, be made into the liner of various corresponding construction shapes with fiberglass or antiseptic rubber, to prevent the corrosion of Korrosionsmedium (as coal gas) to various cleaning equipment linings.Use fiberglass or antiseptic rubber technology, can play etch-proof effect to a certain extent, but weak point is: 1. make anticorrosion its complex manufacturing technology of lining with fiberglass or antiseptic rubber and difficulty of construction big, especially construction is quite difficult in narrow and small high-altitude tank body, and an anticorrosion insoluble problem especially at various device and the various pipeline places that are connected, construction quality be cannot say for sure card; 2. cost of manufacture height, 2～3 times that are the new technology cost (as making the back boxing material, the nearly 400 yuan/m of cost cost with fiberglass
2); 3. fiberglass is prone to delamination after through one period service time, causes seepage, and result of use is not good ...In addition, according to domestic interrelated data introduction, present domestic have a kind of its composition and manufacture craft and the still undocumented YJF-1 type of coating process fluorubber heavy-duty anticorrosive coating, the inside of the strange different shape equipment of shape such as retort, groove, pipeline that can be applicable to be subjected in the industries such as metallurgy, chemical industry and machinery seriously corroded is anticorrosion, receives certain effect; But YJF-1 type fluorubber heavy-duty anticorrosive coating is applied to the anti-corrosion protection of grotesque equipment inwall such as various withdrawals, reaction tower jar and each tube connector and equipment junction in the coal chemical enterprise gas cleaning system, does not also have article to do special topic introduction.
Summary of the invention
The object of the present invention is to provide a kind of coke oven gas purification system equipment lining anticorrosive coating technology, promptly at the design feature of various device in the coke oven gas purification system, change traditional anticorrosive coating technology, replace traditional fiberglass or antiseptic rubber various device inwall and pipeline anticorrosion in gas cleaning system, use domestic the listing but the regenerator of YJF-1 type fluorubber heavy-duty anticorrosive coating in the coke oven gas purification system of unexposed its composition and coating process instead, scrubbing tower, the anticorrosion maintenance of the inwalls such as tar ammonia groove and the pipeline that is connected, and one cover anticorrosive coating technology is disclosed according to its equipment characteristic, reach the corrosion-resistant purpose.
For achieving the above object, the technical solution used in the present invention is: at first handle carried out derusting by sandblasting by the surface of corrosion-resistant equipment (following abbreviation " steel substrate surface "), use solvent (as ethanol) to clean then, remove the grease and the dirt on surface, up to passed examination, next carries out spice.This coating process is divided into A component and B component, before carrying out the steel substrate surface anticorrosive coating with A component and B component by weight A: B=5: 1 prepares, and fully stirs 15 minutes (viscosity was controlled at about 15 seconds).By the requirement of primary coat coatings and face coating process, base steel is carried out anticorrosive coating, the overlay painting interval time of the consumption that is coated with charging, coating layer thickness, brushing number of times and each application layer that strict control is every square metre.
Adopt in the lining antiseptic project of coating process various device in the coke oven gas purification system that as above technical scheme provides, can save 186～208 yuan of construction costs for every square metre.To a coal chemical enterprise of producing 55～600,000 tons of coke per year, the antiseptic project amount of gas cleaning system is about 4000～5000 square metres, first stage of construction can be saved construction investment 75～840,000 yuan, and its antiseptic effect is anticorrosion more excellent more than 2.5 times than adopting fiberglass or antiseptic rubber, after testing, life cycle can prolong 8～10 years, and easy construction, heatproof (250 ℃) performance are good, applied widely.Simultaneously harmless to workmen's health in coating process.
Description of drawings
Fig. 1 is each coated shape schematic diagram of coke oven gas purification system equipment lining anticorrosive coating technology of the present invention, also is specification digest accompanying drawing of the present invention.
The specific embodiment
Be described in further detail below in conjunction with the specific embodiment of accompanying drawing this invention.
As shown in Figure 1,1 for needing the equipment back boxing of anti-corrosion protection, i.e. base steel, and 2 is the priming coat on the base steel 1, is generally two-layer; 3 is the finishing coat on priming coat 2, is 8～10 times to general corrosion protective lining brushing, and promptly finishing coat 3 has 8～10 layers, and to special corrosion protective lining brushing 10～12 times, promptly finishing coat 3 is 10～12 layers.
Before anticorrosive coating, sandblast or shot peening are adopted in the surface of base steel 1, and the antirust quality of sandblast reaches the above standard of Sa2.5 level, roughness remains on 40～70 microns.Clean with solvent (ethanol) surface to the base steel 1 after the rust cleaning, removes the grease and the dirt of surface, makes its surface have metallic luster.
Eliminated rust in the surface of base steel 1 back and before rust is not returned in its surface, carrying out the application of anticorrosive paint.Usually be divided into primer coating process and coating materials coating process, the brushing method of its coating is brushing, roller coat and spraying.Fast because of the coating surface drying, can construct continuously, the present invention is mainly adopted brushing technology.
The bottom coating process:
1, spice: the subbing of base steel 1 is divided into A, the two components of B, A component are that poly-tetrafluoro tetraene, poly-trifluoro-ethylene and epoxy radicals are formed film forming matter host, and the B component is the vulcanizing agent that bis-phenol is formed, diluent is the ethyl acetate special diluting agent, and its consumption is controlled in 3%.Before the application, with A, B component by weight A: B=5: 1 prepares, and mixes the back and fully stirs 10-20 minute, and viscosity was controlled at about 15 seconds, was YJF-1 type fluorubber heavy-duty anticorrosive coating in the deployed mixture of this ratio.In this dual-component coating of forming by A, B component, add ethyl acetate diluent (its addition be weight ratio about 3%), constitute the bottom coating process of base steel 1.
2, application: use bottom to be coated with the charging application and constitute priming coat 2 to the surface of base steel 1, the every of priming coat 2 is 0.19～0.22kg/m all over being coated with the charging consumption
2, every layer of application thickness d of priming coat 2
1Be 20～25 microns, brush and get final product for twice.The total film thickness D of priming coat 2
1Get final product at 50 ± 10 microns, be controlled in 10～20 minutes every time blanking time of priming coat 2.It is fast that application speed is wanted, and the priming coat 2 of application is even, do not have trickling.
Carry out next step coating process after 24 hours again in the intact air dry of priming coat 2 applications.
The surface layer coating process:
1, spice: the investment precoat of base steel 1 also is divided into the two components of A ', B '.Form the A ' component of the host of filming and vulcanizing agent B ' component of forming by bis-phenol by polytetrafluoroethylene (PTFE), poly-trifluoro-ethylene, diluent is the ethyl acetate special diluting agent, before application, deployed by weight A ': B '=5: 1, mix the back and fully stir 10～20 minutes (the best is 15 minutes) back to add weight be the surface layer coating process that 1.5～2.0% ethyl acetate special diluting agent constitutes base steel 1, viscosity was controlled at about 15 seconds.
2, application: use the as above deployed surface layer coating process of method, brush the finishing coat 3 that constitutes base steel 1 on the priming coat 2 with coating process, the every of finishing coat 3 is 0.17～0.20kg/m all over being coated with the charging consumption
2, every layer of application thickness d of finishing coat 3
2It is 15～25 microns.Its finishing coat 3 of general anticorrosion position to base steel 1 is 8～10 layers, and its finishing coat 3 of special corrosion-resistant position is 10～12 layers.The total film thickness D of finishing coat 3
2Be 180～250 microns, finishing coat is controlled in 10 minutes for 3 blanking times of every time.In coating process, accomplish that application speed is fast, the finishing coat 3 of application is wanted evenly, is not had trickling, because this coating surface drying is fast, can work continuously simultaneously.
Should be smoothly seamless through base steel 1 surface after the as above coating process application, free of pinholes, bubble, stream bob, efflorescence and junk etc., the thickness of coating carry out random sampling with magnetic thickness tester and detect, and application layer air dry maintenance can be come into operation in 15 days.
Claims (1)
1, a kind of coke oven gas purification system equipment lining anticorrosive coating technology, before anticorrosive coating, sandblast or shot peening are adopted in surface to base steel (1), the rust cleaning credit rating requires to reach the Sa2.5 level, surface roughness requires to reach 40～70 microns, clean with solvent the surface of the base steel (1) after the rust cleaning, eliminates the grease and the dirt of surface; In YJF-1 type fluorubber heavy-duty anticorrosive coating, add weight ratio and be 3% ethyl acetate diluent and constitute the bottom coating process of base steel (1); Form the A ' component of the host of filming and vulcanizing agent B ' component of forming by bis-phenol by polytetrafluoroethylene (PTFE), poly-trifluoro-ethylene, deployed by weight A ': B '=5: 1, stir after 10～20 minutes that to add weight be the surface layer coating process that 1.5～2.0% ethyl acetate special diluting agent constitutes base steel (1), it is characterized in that: use the bottom coating process to be coated with on the surface that installs to base steel (1), constitute priming coat (2), the every of priming coat (2) is 0.19～0.22kg/m all over being coated with the charging consumption
2, every layer of application thickness d of priming coat (2)
1Be 20～25 microns, be controlled at the total film thickness D of priming coat (2) every time blanking time of priming coat (2) 10～20 minutes
1It is 50 ± 10 microns; After 24 hours, use the application of surface layer coating process to go up the finishing coat (3) that constitutes base steel (1) to priming coat (2) in priming coat (2) air dry, the every of finishing coat (3) is 0.17～0.2kg/m all over being coated with the charging consumption
2, every layer of application thickness d of finishing coat (3)
2Be 15～25 microns, the total film thickness D of finishing coat (3)
2Be 180～250 microns, be controlled in 10 minutes every time blanking time of finishing coat (3); Priming coat of application (2) and finishing coat (3) are even, the nothing trickling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02139606 CN1265894C (en) | 2002-09-10 | 2002-09-10 | Preservation painting process for liner of coke-oven gas clarification system device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02139606 CN1265894C (en) | 2002-09-10 | 2002-09-10 | Preservation painting process for liner of coke-oven gas clarification system device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1482216A CN1482216A (en) | 2004-03-17 |
| CN1265894C true CN1265894C (en) | 2006-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02139606 Expired - Fee Related CN1265894C (en) | 2002-09-10 | 2002-09-10 | Preservation painting process for liner of coke-oven gas clarification system device |
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| CN (1) | CN1265894C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009226266A (en) * | 2008-03-19 | 2009-10-08 | Honda Motor Co Ltd | Production method of car body |
| CN110318873A (en) * | 2018-03-29 | 2019-10-11 | 宝山钢铁股份有限公司 | A method of eliminating GT hot passage parts deposit |
| CN108787399A (en) * | 2018-05-10 | 2018-11-13 | 巢湖市南特精密制造有限公司 | A kind of flange surface antirusting treating method |
| CN112795222A (en) * | 2020-12-29 | 2021-05-14 | 华能山东泗水新能源有限公司 | Anti-corrosion composite material and preparation method and application thereof |
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2002
- 2002-09-10 CN CN 02139606 patent/CN1265894C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1482216A (en) | 2004-03-17 |
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