CN102642305A - Vacuum bonding method of anticorrosive fluoroplastic lining - Google Patents
Vacuum bonding method of anticorrosive fluoroplastic lining Download PDFInfo
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- CN102642305A CN102642305A CN2012100655911A CN201210065591A CN102642305A CN 102642305 A CN102642305 A CN 102642305A CN 2012100655911 A CN2012100655911 A CN 2012100655911A CN 201210065591 A CN201210065591 A CN 201210065591A CN 102642305 A CN102642305 A CN 102642305A
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Abstract
The invention discloses a lining method of chemical equipment and provides a vacuum bonding method of an anticorrosive fluoroplastic lining, solving the technical problem in the prior art that the lining layers are liable to collapse, expand, fracture and the like under the working condition of high temperature or negative pressure, thus causing failure of the anticorrosive lining. The method has the following advantages: the manufacture cost is low; and the lining is tightly lined in a container through vacuum absorption, thus improving the high temperature and negative pressure resistance of the equipment. The process roughly comprises the following steps: cutting a plurality of anticorrosive fluoroplastic boards which can be fully stuck in the container flatwise, painting polymer binders on the anticorrosive fluoroplastic boards and the inner wall of the container respectively, putting a plurality of fiber ropes which are arranged in a cross manner on the pasting surfaces of the anticorrosive fluoroplastic boards after the anticorrosive fluoroplastic boards are aired and sticking the anticorrosive fluoroplastic boards on the inner wall of the container flatwise, arranging through holes on the container wall corresponding to the cross points of the fiber ropes and communicating the through holes with vacuum equipment, then carrying out vacuumizing after sealing the peripheries of the anticorrosive fluoroplastic boards firmly with adhesive tapes and primarily vulcanizing the additionally corresponding container areas, carrying out thermo-fusion welding on the joints after all the anticorrosive fluoroplastic boards are pasted and carrying out steam pressurizing after double leakage detection to complete secondary vulcanization.
Description
Technical field
The present invention relates to a kind of lining method of chemical industry equipment, relate in particular to a kind of vacuum suction of passing through and the anti-corrosive fluoroplastic lining is tightly served as a contrast in container the vacuum adhering method of the anti-corrosive fluoroplastic lining of the high temperature resistant and anti-negative pressure performance of raising equipment.
Background technology
Existing chemical industry equipment carries out lining through adopting anti-corrosive fluoroplastic, and traditional method mainly contains isobaric PTFE, twines PTFE, the overlap welding of PTFE plate or the like, but there is a common shortcoming in above-mentioned lining method; Be to have the gap between anti-corrosive fluoroplastic backing layer and the container inner wall; Therefore be referred to as loose lining method, but when adopting loose lining method lining, if high temperature or negative pressure working condition; Backing layer tends to subside, play drum and even phenomenon such as break, and directly causes corrosion protective lining to lose efficacy.
Chinese patent discloses a kind of large anticorrosion equipment lined with fusible fluoroplastic and preparation method thereof (CN100548469C), comprises steel or glass fibre reinforced plastics casing, and steel or glass shell inner surface are with the fusible fluoroplastic lining; Described lining is the thin-walled layer of integral seamless structure, and bonding by bonding agent and steel or glass fibre reinforced plastics casing, its preparation method is at first the fusible fluoroplastic process of resin to be become film; The mold outer surface decontamination of again moulding being used is spread remover after doing, then with the fusible fluoroplastic film in the mould outside multilayer binding to desired thickness; At its outsourcing last layer glass fabric, tie up the exotic material band in the glass fabric outside again, and workpiece is sent into the stove heating plasticizing again; Insulation, workpiece is taken out in slowly cooling; Be cooled to the demoulding after the room temperature; The lining dress, shut with blind plate at the member two ends that will serve as a contrast at last after adorning, and opens the two ends blind plate and be anticorrosion equipment.This lining method is that fusible fluoroplastic through an integral seamless is as container lining; To overcome the problem of the difficult quality guarantee that the splicing construction lining exists; But this lining method manufacturing cost is high, and through can only making the lining cylinder partial, so splicing need be welded toward contact in the two ends of clad vessel; Can't realize the integral seamless structure; Therefore when high temperature or the work of negative pressure working condition, backing layer is same to be existed and is prone to subside, rises and rouse and even phenomenon such as break, and directly causes technical problems such as corrosion protective lining inefficacy.
Summary of the invention
It is low that the present invention has mainly provided a kind of cost of manufacture; Through vacuum suction the anti-corrosive fluoroplastic lining is tightly served as a contrast in container; Thereby the vacuum adhering method of the anti-corrosive fluoroplastic lining of the high temperature resistant and anti-negative pressure performance of raising equipment; Solved exist in the prior art at high temperature or negative pressure working condition, phenomenon such as backing layer is prone to subside, rouse, break causes the technical problem of corrosion protective lining inefficacy etc.
The container that adopts the inventive method to carry out lining simultaneously in use can be regulated the bonding force of lining and container inner wall according to duty; And can the industrial chemicals that ooze out in the container in time be got rid of to container; Thereby not only strengthened the bonding force of lining and container inner wall; And prevent that the industrial chemicals that oozes out from corroding container, prolongs the service life of equipment.
Above-mentioned technical problem of the present invention mainly is able to solve through following technical proposals: a kind of vacuum adhering method of anti-corrosive fluoroplastic lining comprises the steps:
1) with the surface of internal cavity of clad vessel polish, degreasing and blasting treatment;
2) prefabricated some anti-corrosive fluoroplastic plates require anti-corrosive fluoroplastic plate splicing back consistent with the cavity shape and the size of clad vessel;
3) on the clad vessel wall corresponding with every anti-corrosive fluoroplastic plate, several through holes are set all, through hole links to each other with outer vacuum tank or the vavuum pump of clad vessel;
4) on the adhesive surface of the surface of internal cavity of clad vessel and anti-corrosive fluoroplastic plate, dry behind the brushing polymer binder respectively;
5) some the cordage that on the adhesive surface of anti-corrosive fluoroplastic plate, are staggered require the infall of cordage corresponding with the through hole on the clad vessel wall;
6) any anti-corrosive fluoroplastic plate is flattened on the corresponding clad vessel inwall; And with adhesive plaster being encapsulated on the inwall of clad vessel all around with anti-corrosive fluoroplastic plate; Start corresponding vacuum tank or vavuum pump, drain the air between anti-corrosive fluoroplastic plate and clad vessel;
7) polymer binder tentatively vulcanizes: the corresponding clad vessel in anti-corrosive fluoroplastic plate zone is carried out the localized sustained heating, heating-up temperature be 180 degree to 200 degree, be to remove adhesive plaster after 10 to 20 minutes and close vacuum tank or vavuum pump heat time heating time;
8) repeating step 6) and 7) be operated to whole anti-corrosive fluoroplastic plates and all post the inner chamber at clad vessel;
9) seam between adjacent anti-corrosive fluoroplastic plate is carried out thermofussion welding;
10) process leak detection: hunt leak with the electric spark leak detector butt welded seam, and leak source is carried out repair welding;
11) resistance leak detection: with pressurizeing after the fills with water in the clad vessel, the clad vessel resistance value is measured in pressurize after 2 to 3 hours;
12) polymer binder complete cure: each through hole on the clad vessel is communicated with vacuum tank or vavuum pump simultaneously, in clad vessel, feeds steam rear enclosed clad vessel mouth pressurize 2 to 6 hours again.
13) each through hole of shutoff behind dismounting vacuum tank or the vavuum pump.
Wherein step 1) and step 2) can exchange, step 3) to step 13) is in step 1) and step 2) carry out in proper order afterwards.At first with the inwall of clad vessel polish, degreasing and blasting treatment, make the container inner wall smooth, will tailor some anti-corrosive fluoroplastic plates again; Cavity shape and size with clad vessel when making anti-corrosive fluoroplastic plate be tiled in container inner wall are consistent, on the corresponding clad vessel wall of every anti-corrosive fluoroplastic plate, open several small through hole again, and the through hole outside links to each other with vacuum system; Again polymer binder is painted on the bonding plane of inner surface of container and anti-corrosive fluoroplastic plate,, and guarantees that each brushing back polymer binder parches (being standard with tack-free) and carries out brushing next time again through repeatedly brushing; Some cordage of criss-cross arrangement constitute the vacuum suction passage on the adhesive surface of anti-corrosive fluoroplastic plate then, again with the anti-corrosive fluoroplastic plate concora crush on the container inner wall of correspondence, require the infall of cordage corresponding with the through hole on the container inner wall; Edge with anti-corrosive fluoroplastic plate secures on container inner wall with adhesive plaster then, and guarantees air tightly, connects vacuum tank or vavuum pump then; Make the air that is enclosed between anti-corrosive fluoroplastic plate and container inner wall all aspirate removal, in outside of containers respective regions is carried out heat tracing again, make polymer binder tentatively vulcanize (curing); Remove adhesive plaster again and close vacuum system, according to said method accomplish the anti-corrosive fluoroplastic plate of entire container and paste, then the anti-corrosive fluoroplastic plate piece is welded and butt welded seam is tested; With the entire container sealing, feed the steam of suitable pressure after the assay was approved, open corresponding vacuum tank of whole through holes or vavuum pump and keep the vacuum state to carry out the steam pressurize; Accomplish the sulfuration (curing) of polymer binder, through the chemical industry equipment that above-mentioned process is made, high temperature resistant and anti-negative pressure performance is greatly improved; Can satisfy the use of safety and stability under the vacuum operating mode below 120 °, and other method cost of manufacture of the prior art relatively is low, because there is small gap in the fiber between cordage; Thereby made up the vacuum passage of conducting in the anti-corrosive fluoroplastic plate surface automatically with the simplest method, when starting vacuum system, the anti-corrosive fluoroplastic lining promptly adsorbs and tightly serves as a contrast in container; Simultaneously the container of lining in use also can be according to the bonding force of regulating working conditions lining and container inner wall, when starting external vacuum system during for negative pressure state in the container, the industrial chemicals that oozes out in the container is absorbed to container; Not only strengthened the bonding force of lining and container inner wall; Prevent that lining from playing drum and breaking, and prevent that industrial chemicals from infiltrating interlayer internal corrosion container, prolonged the service life of equipment; When being the high temperature barotropic state in the container, can open the vacuum interface (through hole) on the container; The industrial chemicals that oozes out in the container is outwards got rid of from through hole automatically, and general idea is ingenious, energy-conserving and environment-protective; Regelate; Multiple detection, the lining qualification rate is high, and service life of equipment is long.
As preferably, need repeatedly brushing polymer binder 3 to 5 times in the said step 4), the coating layer thickness of polymer binder is 0.3 to 0.5mm.Repeatedly brushing has guaranteed the density of adhesive on pocket inwall and anti-corrosive fluoroplastic plate, improves and pastes fastness.
As preferably, said polymer binder is epoxy glue or rubber-based glue.Epoxy glue or rubber-based glue adherence force are strong, good stability.
As preferably, said step 6) adopts artificial method of rolling system to eliminate the air between anti-corrosive fluoroplastic plate and clad vessel when starting corresponding vacuum tank or vavuum pump simultaneously, and knocks anti-corrosive fluoroplastic plate through hammer and check and have or not air residual.Adopt artificial householder method to guarantee that the air between anti-corrosive fluoroplastic plate and clad vessel drains, and check whether emptying through knocking with hammer, method is simply effective.
As preferably, said step 9) needs between adjacent anti-corrosive fluoroplastic plate, groove to be set and welds.Groove can improve weldquality, prevents that the anti-corrosive fluoroplastic plate seam from leaking.
As preferably, the steam pressure in the said step 12) is 0.1 to 0.5MPa.Suitable steam pressure can guarantee that polymer binder can solidify fully, improves the adhesive strength of anti-corrosive fluoroplastic plate and container inner wall.
As preferably, the through hole in the said step 13) adopts the plug of living.The plug of living makes things convenient for the installation of vacuum system and opens or closes through hole according to the operating mode needs.
As preferably, said anti-corrosive fluoroplastic plate is PFA, PVDF, ECTFE, ETFE, the compound plate of FEP or PTFE activating plate.Compound plates such as PPFA, PVDF, ECTFE, ETFE, FEP or PTFE activating plate are the hot melt fluoroplastic plate, good processability.
Therefore, the vacuum adhering method of anti-corrosive fluoroplastic lining of the present invention has following advantage: through vacuum suction the anti-corrosive fluoroplastic lining is tightly served as a contrast in container in the lining taping process, lining and container degree of adhesion are good; Intensity is high, and cost of manufacture is low, has improved the high temperature resistant and anti-negative pressure performance of equipment; Clad vessel in use can be according to the bonding force of regulating working conditions lining and container inner wall simultaneously; And the industrial chemicals that oozes out in the container in time got rid of to container, not only strengthened the bonding force of lining and container inner wall, prevent that lining from playing drum and breaking; And the industrial chemicals of avoiding oozing out corrosion container, prolonged service life of equipment.
Description of drawings:
Fig. 1 is that anti-corrosive fluoroplastic plate among the present invention is in implementation step 6) time structural representation;
Fig. 2 is the A-A amplification view of Fig. 1.
The specific embodiment:
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment:
The vacuum adhering method of a kind of anti-corrosive fluoroplastic lining of the present invention, the anti-corrosive fluoroplastic lining manufacturing process with vertical storage tank is that example adds below, comprises the steps:
1) with the surface of internal cavity of clad vessel 1 polish, degreasing and blasting treatment;
2) tailor some anti-corrosive fluoroplastic plates 5 in advance, anti-corrosive fluoroplastic plate 5 is tailored by the PTFE activating plate and is formed, and requires anti-corrosive fluoroplastic plate 5 tiling splicings cavity shape and size with container 1 when container 1 inwall consistent;
3) on clad vessel 1 wall corresponding with every anti-corrosive fluoroplastic plate 5, open several through holes 4, as shown in Figure 2, through hole 4 links to each other with clad vessel 1 outer vavuum pump 7 through joint;
4) brushing polymer binder 6 respectively on the adhesive surface of the surface of internal cavity of clad vessel 1 and anti-corrosive fluoroplastic plate 5; Polymer binder 6 is an epoxy glue; Brush repeatedly 3 times; Make epoxy adhesive layer thickness reach 0.4 mm, and guarantee that last time, the epoxy adhesive layer of brushing parched (being standard with tack-free) when brushing once more;
5) some cordage of criss-cross arrangement 3 on the adhesive surface of anti-corrosive fluoroplastic plate 5 require the infall of cordage 3 corresponding with the through hole 4 on clad vessel 1 wall;
6) anti-corrosive fluoroplastic plate 5 wherein is flattened on corresponding clad vessel 1 inwall; Secure with adhesive plaster 2 all around; Make on the inwall that is encapsulated in clad vessel 1 of anti-corrosive fluoroplastic plate 5; Start corresponding vavuum pump 7, roll through the roller manual work of polytetrafluoroethylmaterial material simultaneously and press anti-corrosive fluoroplastic plate 5 surfaces, to eliminate the air of 1 of anti-corrosive fluoroplastic plate 5 and clad vessel; And the hammer through polytetrafluoroethylmaterial material knocks anti-corrosive fluoroplastic plate 5 and checks and have or not air residual, thoroughly to drain the air of 1 of anti-corrosive fluoroplastic plate 5 and clad vessel;
7) polymer binder tentatively vulcanizes: outside corresponding to the clad vessel 1 of anti-corrosive fluoroplastic plate 5, carry out the localized sustained heating through the coal gas rifle; Heating and temperature control is between 180 degree to 200 degree; Be 15 minutes heat time heating time, removes adhesive plaster 2 then, closes corresponding vavuum pump 7;
8) repeating step 6) and 7) operation, the inner chamber that all posts at clad vessel 1 to whole anti-corrosive fluoroplastic plates 5 constitutes a complete lining;
9) open V-butt 5 of adjacent anti-corrosive fluoroplastic plates, adopt PFA welding rod and welding manual welding and welding combination automatically, the seam of 5 of adjacent anti-corrosive fluoroplastic plates is carried out thermofussion welding;
10) process leak detection: hunt leak with the electric spark leak detector butt welded seam, and leak source is carried out repair welding;
11) resistance leak detection: with 2 kilograms of pressurizations after the fills with water in the clad vessel 1, clad vessel 1 resistance value is measured in pressurize after 2 to 3 hours, and it is qualified when resistance value surpasses 1000 megaohms, to judge, otherwise carries out the process leak detection again to qualified;
12) polymer binder complete cure: with each through hole on the clad vessel 14 simultaneously and corresponding vavuum pump 7 be communicated with the steam rear enclosed clad vessel mouth pressurize 4 hours of feeding 0.3MPa to clad vessel 1 in again.
13) remove vavuum pump 7 backs and block each through hole 4 with screw thread plug alive.
During use, when being negative pressure state in the container 1, each through hole 4 connects vavuum pump 7 respectively and starts; The industrial chemicals that oozes out in the container 1 on container 1 inwall is absorbed to container 1 through the vacuum passage that cordage 3 constitutes, not only strengthened the bonding force of anti-corrosive fluoroplastic plate 5, prevent that lining from playing drum and breaking with container 1 inwall; And prevent that the industrial chemicals that oozes out from corroding container 1, prolonged the service life of equipment, when being the high temperature barotropic state in the container 1; Can open the vacuum interface (through hole 4) on the container 1, the industrial chemicals that oozes out is outwards got rid of from through hole 4 automatically, general idea is ingenious; Energy-conserving and environment-protective, service life of equipment is long.
Specific embodiment described herein only is that design of the present invention is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (8)
1. the vacuum adhering method of an anti-corrosive fluoroplastic lining is characterized in that: comprise the steps:
1) with the surface of internal cavity of clad vessel polish, degreasing and blasting treatment;
2) prefabricated some anti-corrosive fluoroplastic plates require anti-corrosive fluoroplastic plate splicing back consistent with the cavity shape and the size of clad vessel;
3) on the clad vessel wall corresponding with every anti-corrosive fluoroplastic plate, several through holes are set all, through hole links to each other with outer vacuum tank or the vavuum pump of clad vessel;
4) on the adhesive surface of the surface of internal cavity of clad vessel and anti-corrosive fluoroplastic plate, dry behind the brushing polymer binder respectively;
5) some the cordage that on the adhesive surface of anti-corrosive fluoroplastic plate, are staggered require the infall of cordage corresponding with the through hole on the clad vessel wall;
6) any anti-corrosive fluoroplastic plate is flattened on the corresponding clad vessel inwall; And with adhesive plaster being encapsulated on the inwall of clad vessel all around with anti-corrosive fluoroplastic plate; Start corresponding vacuum tank or vavuum pump, drain the air between anti-corrosive fluoroplastic plate and clad vessel;
7) polymer binder tentatively vulcanizes: the corresponding clad vessel in anti-corrosive fluoroplastic plate zone is carried out the localized sustained heating, heating-up temperature be 180 degree to 200 degree, be to remove adhesive plaster after 10 to 20 minutes and close vacuum tank or vavuum pump heat time heating time;
8) repeating step 6) and 7) be operated to whole anti-corrosive fluoroplastic plates and all post the inner chamber at clad vessel;
9) seam between adjacent anti-corrosive fluoroplastic plate is carried out thermofussion welding;
10) process leak detection: hunt leak with the electric spark leak detector butt welded seam, and leak source is carried out repair welding;
11) resistance leak detection: with pressurizeing after the fills with water in the clad vessel, the clad vessel resistance value is measured in pressurize after 2 to 3 hours;
12) polymer binder complete cure: each through hole on the clad vessel is communicated with vacuum tank or vavuum pump simultaneously, in clad vessel, feeds steam rear enclosed clad vessel mouth pressurize 2 to 6 hours again;
13) each through hole of shutoff behind dismounting vacuum tank or the vavuum pump;
Wherein step 1) and step 2) can exchange, step 3) to step 13) is in step 1) and step 2) carry out in proper order afterwards.
2. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 is characterized in that: need repeatedly brushing polymer binder 3 to 5 times in the said step 4), the coating layer thickness of polymer binder is 0.3 to 0.5mm.
3. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 and 2 is characterized in that: said polymer binder is epoxy glue or rubber-based glue.
4. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 and 2; It is characterized in that: said step 6) is when starting corresponding vacuum tank or vavuum pump; Adopt artificial method of rolling system to eliminate the air between anti-corrosive fluoroplastic plate and clad vessel simultaneously, and knock anti-corrosive fluoroplastic plate through hammer and check and have or not air residual.
5. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 and 2 is characterized in that: said step 9) needs between adjacent anti-corrosive fluoroplastic plate, groove to be set and welds.
6. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 and 2 is characterized in that: the steam pressure in the said step 12) is 0.1 to 0.5MPa.
7. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 and 2 is characterized in that: the through hole in the said step 13) adopts the plug of living.
8. the vacuum adhering method of anti-corrosive fluoroplastic lining according to claim 1 and 2 is characterized in that: said anti-corrosive fluoroplastic plate is PFA, PVDF, ECTFE, ETFE, the compound plate of FEP or PTFE activating plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210065591.1A CN102642305B (en) | 2012-03-14 | 2012-03-14 | Vacuum bonding method of anticorrosive fluoroplastic lining |
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| CN201210065591.1A CN102642305B (en) | 2012-03-14 | 2012-03-14 | Vacuum bonding method of anticorrosive fluoroplastic lining |
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| CN102642305B CN102642305B (en) | 2014-02-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969886A (en) * | 2017-03-15 | 2017-07-21 | 张丹丹 | Preservative tank antiseep method of testing |
| CN109867957A (en) * | 2017-12-02 | 2019-06-11 | 保定莱盛打印机配件有限公司 | A kind of hot-rolling mill rubber roller and preparation method thereof |
| CN114311772A (en) * | 2021-12-31 | 2022-04-12 | 宁夏金梯氟塑防腐设备有限公司 | Method for manufacturing polytetrafluoroethylene anticorrosion equipment and polytetrafluoroethylene anticorrosion equipment |
| TWI762213B (en) * | 2021-02-24 | 2022-04-21 | 上品綜合工業股份有限公司 | Fluororesin storage tank and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106969886A (en) * | 2017-03-15 | 2017-07-21 | 张丹丹 | Preservative tank antiseep method of testing |
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| TWI762213B (en) * | 2021-02-24 | 2022-04-21 | 上品綜合工業股份有限公司 | Fluororesin storage tank and manufacturing method thereof |
| CN114311772A (en) * | 2021-12-31 | 2022-04-12 | 宁夏金梯氟塑防腐设备有限公司 | Method for manufacturing polytetrafluoroethylene anticorrosion equipment and polytetrafluoroethylene anticorrosion equipment |
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| CN102642305B (en) | 2014-02-19 |
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