CN109489471B - Sheet bar of anti-corrosion plate type heat exchanger and anti-corrosion treatment method thereof - Google Patents
Sheet bar of anti-corrosion plate type heat exchanger and anti-corrosion treatment method thereof Download PDFInfo
- Publication number
- CN109489471B CN109489471B CN201811341222.4A CN201811341222A CN109489471B CN 109489471 B CN109489471 B CN 109489471B CN 201811341222 A CN201811341222 A CN 201811341222A CN 109489471 B CN109489471 B CN 109489471B
- Authority
- CN
- China
- Prior art keywords
- plate
- corrosion
- heat exchanger
- polyvinyl alcohol
- xylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 61
- 230000007797 corrosion Effects 0.000 claims abstract description 46
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 40
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 40
- 239000008096 xylene Substances 0.000 claims abstract description 37
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000012790 adhesive layer Substances 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005536 corrosion prevention Methods 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims description 67
- 238000005507 spraying Methods 0.000 claims description 61
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 48
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 21
- 239000010963 304 stainless steel Substances 0.000 claims description 19
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 19
- 239000007864 aqueous solution Substances 0.000 claims description 16
- 238000000227 grinding Methods 0.000 claims description 16
- 229910000856 hastalloy Inorganic materials 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 11
- 239000010935 stainless steel Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 235000006408 oxalic acid Nutrition 0.000 claims description 9
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical group [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 8
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910001252 Pd alloy Inorganic materials 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- BSIDXUHWUKTRQL-UHFFFAOYSA-N nickel palladium Chemical compound [Ni].[Pd] BSIDXUHWUKTRQL-UHFFFAOYSA-N 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 235000012222 talc Nutrition 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002421 anti-septic effect Effects 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 24
- 238000012360 testing method Methods 0.000 description 17
- 238000012546 transfer Methods 0.000 description 15
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000005554 pickling Methods 0.000 description 5
- -1 polytetrafluoroethylene Polymers 0.000 description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
Abstract
The invention provides a plate sheet of an anti-corrosion plate type heat exchanger and an anti-corrosion treatment method thereof. The surface of the plate is sequentially sprayed with an adhesive layer and an anticorrosive layer; the adhesive layer comprises polyvinyl alcohol, xylene and talcum powder, and the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30: (5-15): (10-15). In the corrosion-resistant plate heat exchanger, the bonding layer tightly bonds the surface of the plate and the surface corrosion-resistant layer, and the obtained plate has the excellent property of acid and alkali corrosion resistance. The antiseptic treatment method has the characteristics of low material price, simple manufacture and stable performance. The invention is suitable for the technical field of corrosion prevention of plate heat exchangers.
Description
Technical Field
The invention relates to a plate sheet of an anti-corrosion plate type heat exchanger and an anti-corrosion treatment method thereof.
Background
At present, plate heat exchangers are widely applied to various industries such as ship industry, paper industry, building industry, food processing factory, printing and dyeing industry, heating and ventilation and air conditioning, medicine industry, electric power industry, steel industry and the like, and have the characteristics of high heat transfer efficiency, small heat loss, small resistance, small occupied area, easiness in maintenance and low investment. With the wider and wider application of the plate heat exchanger in the industry, the requirements on the plate heat exchanger are higher and higher, particularly in chemical enterprises and the steel environmental protection industry, the medium in contact with the plate heat exchanger has strong corrosivity, and the common 304 stainless steel cannot meet the corrosion resistance requirements of products. Although 316L, titanium plates and special alloy steel plates are widely used, the stainless steel plate type heat exchanger still has the corrosion problem under the extremely severe environment (high-temperature and high-concentration chloride ion acid environment). Meanwhile, the titanium plate and the special alloy steel plate are high in price and cannot be applied in large quantities, so that the novel corrosion-resistant plate heat exchanger has wide application prospect.
Disclosure of Invention
The invention aims to solve the technical problem of corrosion of a plate heat exchanger under severe working conditions such as an acid environment, a chloride ion environment, a high-temperature environment and the like in the prior art, and provides a plate sheet of an anti-corrosion plate heat exchanger and an anti-corrosion treatment method thereof. In the corrosion-resistant plate heat exchanger, the bonding layer tightly bonds the surface of the plate and the surface corrosion-resistant layer, and the obtained plate has the excellent property of acid and alkali corrosion resistance. The antiseptic treatment method has the characteristics of low material price, simple manufacture and stable performance. The invention is suitable for the technical field of corrosion prevention of plate heat exchangers.
The invention solves the technical problems through the following technical scheme:
the invention provides a plate sheet of an anti-corrosion plate type heat exchanger, wherein a bonding layer and an anti-corrosion layer are sequentially sprayed on the surface of the plate sheet;
the adhesive layer comprises polyvinyl alcohol, xylene and talcum powder, and the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30: (5-15): (10-15); the thickness of the bonding layer is 5-40 mu m.
The plate is made of plate heat exchanger plate materials commonly used in the field, such as 304 stainless steel, 316L stainless steel, special alloy steel or titanium and the like; the present invention is preferably 304 stainless steel or 316L stainless steel.
The thickness of the plate is the thickness of a plate heat exchanger plate commonly used in the field, and the thickness of the plate is preferably 0.4-0.8 mm (such as 0.4mm, 0.5mm and 0.8 mm).
Preferably, the adhesive layer is composed of polyvinyl alcohol, xylene, and talc.
Preferably, the mass ratio of the polyvinyl alcohol to the xylene to the talc powder in the components of the adhesive layer is 30:15: 10.
Or in the components of the bonding layer, the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30:5: 10.
Or in the components of the bonding layer, the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30:15: 15.
Or in the components of the bonding layer, the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30:10: 15.
Preferably, the thickness of the adhesive layer is 10 to 25 μm (e.g., 10 μm, 15 μm, 20 μm, 25 μm). Within the thickness range, the durability of the corrosion resistance can be effectively improved, and the high-temperature corrosion resistance can be improved.
The material of the anticorrosive layer can be anticorrosive material commonly used in the field, and the invention is preferably one or more of fluororesin (such as polytetrafluoroethylene), nickel-palladium alloy, graphite and hastelloy.
Preferably, the thickness of the anti-corrosion layer is 15 to 35 μm (e.g., 20 μm, 30 μm, 35 μm).
The invention also provides an anticorrosive treatment method for the plate sheet of the anticorrosive plate heat exchanger, which comprises the following steps:
(1) the sheet bar of the corrosion-resistant plate heat exchanger is subjected to surface pretreatment;
(2) spraying a bonding layer:
uniformly mixing the raw materials of the bonding layer, drying, grinding into powder, sieving with a 200-300-mesh sieve, and spraying onto the surface of the plate sheet obtained in the step (1) by using an electrostatic powder spraying method;
the raw materials of the bonding layer comprise polyvinyl alcohol, dimethylbenzene, talcum powder, ethanol and water;
(3) spraying a corrosion-resistant layer:
grinding one or more of fluororesin (such as polytetrafluoroethylene), nickel-palladium alloy, graphite and hastelloy into powder, and spraying the powder onto the bonding layer obtained in the step (2) by using an electrostatic powder spraying method after passing through a 100-200-mesh sieve;
(4) baking the sprayed sheet at 150-200 deg.C (e.g. 150 deg.C, 180 deg.C, 200 deg.C) for 120-180 min (e.g. 120min, 150min, 160min, 180 min).
In the step (1), the surface pretreatment comprises: and (3) after acid washing in an acid medium, adding the mixture into a solution containing a surfactant, soaking and stirring, and airing.
Preferably, the acidic medium is an oxalic acid aqueous solution with the mass fraction of 20-50%.
Preferably, the solution containing the surfactant is a sodium dodecyl benzene sulfonate aqueous solution with the concentration of 2-10 g/L.
The raw material of the adhesive layer may also include other common volatile solvents such as methanol and the like.
Preferably, the raw materials of the adhesive layer consist of polyvinyl alcohol, xylene, talcum powder, ethanol and water.
Preferably, in the raw materials of the adhesive layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30: (5-15): (10-15): (30-50): (5-15).
Preferably, in the raw materials of the adhesive layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:15: 10: 40: 5.
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:5: 10: 50: 5.
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:15: 15: 35: 5.
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:10: 15: 30: 15.
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:5: 10: 45: 10.
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:15: 15: 30: 10.
in steps (2) and (3), the electrostatic powder spraying method may be one commonly used in the art, for example, using the following parameters: the electrostatic voltage is 60kV, and the gas supply pressure is 8 pa.
The positive progress effects of the invention are as follows:
(1) in the corrosion-resistant plate heat exchanger, the bonding layer tightly bonds the surface of the plate and the surface corrosion-resistant layer, and the surface corrosion-resistant layer has a smooth surface and has the excellent characteristics of acid and alkali corrosion resistance. The bonding layer is sequentially sprayed on the surface of the plate heat exchanger by adopting an electrostatic powder spraying method, so that the overall use performance of the plate heat exchanger is improved, dirt is not easy to accumulate in a flow channel, and the corrosion resistance and the scouring resistance of the plate are obviously improved. The problem that plates of the plate heat exchanger in the prior art are seriously corroded under severe working conditions is effectively solved. Compared with the method that the integral plate adopts high-specification corrosion-resistant alloy steel (such as a titanium plate) to resist fluid corrosion, the corrosion-resistant treatment method has the characteristics of lower material price, simple manufacture and stable performance. The invention is suitable for the technical field of corrosion prevention of plate heat exchangers.
(2) The corrosion-resistant plate heat exchanger solves the problem of corrosion of the plate heat exchanger in the prior art under severe working conditions such as acid environment, chloride ion environment, high-temperature environment and the like, and the corrosion-resistant treatment method provides a new idea and a new method for corrosion resistance of the plate heat exchanger.
Drawings
Fig. 1 is a structural schematic diagram of the corrosion-resistant plate heat exchanger plate of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Fluorine-spraying anti-corrosion plate type heat exchanger plate
(1) Surface pretreatment: the method comprises the steps of pickling a newly-pressed 304 stainless steel plate with the plate thickness of 0.5mm in 40% oxalic acid aqueous solution, adding the newly-pressed 304 stainless steel plate into 10g/L sodium dodecyl benzene sulfonate aqueous solution, soaking and stirring, and naturally drying to obtain the plate with a glossy surface.
(2) Polyvinyl alcohol, ethanol, deionized water, xylene and talcum powder are mixed according to the mass ratio of 30: 40: 5: 15:10, uniformly mixing, putting into an oven, drying for 180min at 100 ℃, grinding into powder, filtering by using a screen to obtain solid powder with the particle size of below 200-300 meshes, spraying the powder onto the surface of the pretreated plate by using an electrostatic powder spraying method, and drying at normal temperature, wherein the specific parameters of electrostatic powder spraying are as follows: the electrostatic voltage is 65kV, the gas supply pressure is 10pa, and an electric circuit entering the powder region meets the regulation of GB 50058-2014. The spray thickness was measured by a lever micrometer method using the GB 1764-79 standard and was 15 μm.
(3) Grinding polytetrafluoroethylene into powder, sieving the powder by a sieve of 100-200 meshes, and spraying the powder onto the bonding layer obtained in the step (2) by an electrostatic powder spraying method; the specific parameters of electrostatic powder spraying were as follows: the electrostatic voltage is 60kV, the gas supply pressure is 8pa, the electrical circuit entering the powder region meets the regulation of GB50058-2014, and the spraying thickness is 30 μm.
(4) And baking the sprayed plate at 200 ℃ for 120min to obtain the plate of the fluorine-sprayed anti-corrosion plate heat exchanger. The resulting panel is schematically shown in figure 1.
And (3) placing the sprayed plate into a 15% hydrochloric acid solution to be soaked for 5 months at the temperature of 60 ℃, wherein no corrosive phenomenon appears on the surface of the plate, and the thickness of the plate is basically unchanged when measured. A plate of 304 stainless steel of the same thickness (0.5mm) was placed in the same hydrochloric acid atmosphere and the plate was severely penetrated by corrosion within 1 day.
The obtained plates are assembled into a total heat exchange area of 3m2The obtained fluorine-spraying anti-corrosion plate type heat exchanger is subjected to a water-water heat exchange test, and the total heat transfer coefficient is 4500W/(m)2·K)。
304 stainless steel plates with the same thickness (0.5mm) are assembled into a plate with the total heat exchange area of 3m2The plate heat exchanger has a total heat transfer coefficient of 5000W/(m) under the same test conditions2·K)。
Example 2
Fluorine-spraying anti-corrosion plate type heat exchanger plate
(1) Surface pretreatment: the method comprises the steps of pickling a newly pressed 316L stainless steel plate with the plate thickness of 0.5mm in 50% oxalic acid aqueous solution, adding sodium dodecyl benzene sulfonate with the concentration of 3g/L into the oxalic acid aqueous solution, soaking and stirring, and naturally drying to obtain a glossy surface of the plate.
(2) Polyvinyl alcohol, ethanol, deionized water, xylene and talcum powder are mixed according to the mass ratio of 30: 50: 5: 5:10, uniformly mixing, placing into an oven, drying for 180min at 100 ℃, grinding into powder, filtering by using a screen to obtain solid powder below 200-300 meshes, spraying the powder onto the surface of the pretreated plate by using an electrostatic powder spraying method (the parameters are the same as those in example 1), and measuring the spraying thickness by using a GB 1764-79 standard and a lever micrometer method, wherein the spraying thickness is 15 micrometers.
(3) Grinding polytetrafluoroethylene into powder, sieving the powder by a sieve with 100-200 meshes, and spraying the powder onto the bonding layer obtained in the step (2) by adopting an electrostatic powder spraying method (the parameters are the same as those in the example 1); the spray thickness was 30 μm.
(4) And baking the sprayed plate at 200 ℃ for 120min to obtain the plate of the fluorine-sprayed anti-corrosion plate heat exchanger.
And (3) placing the sprayed plate into a 15% hydrochloric acid solution to be soaked for 5 months at the temperature of 60 ℃, wherein no corrosive phenomenon appears on the surface of the plate, and the thickness of the plate is basically unchanged when measured. A316L stainless steel plate of the same thickness (0.5mm) was placed in the same hydrochloric acid atmosphere and the plate was severely penetrated by corrosion within 7 days.
The obtained plates are assembled into a total heat exchange area of 3m2The obtained fluorine-sprayed anti-corrosion plate type heat exchanger is subjected to a water-water heat exchange test, and the total heat transfer coefficient is 4400W/(m)2·K)。
316L stainless steel plates with the same thickness (0.5mm) are assembled into a plate with the total heat exchange area of 3m2The total heat transfer coefficient of the plate heat exchanger is 4800W/(m) under the same test condition2·K)。
Example 3
Fluorine-spraying anti-corrosion plate type heat exchanger plate
(1) Surface pretreatment: the thickness of a newly pressed 304 stainless steel plate is 0.6mm, the plate is pickled in oxalic acid aqueous solution with the mass fraction of 30%, the plate is added into sodium dodecyl benzene sulfonate aqueous solution with the concentration of 5g/L for soaking and stirring treatment, and the surface of the plate is glossy after natural drying.
(2) Polyvinyl alcohol, ethanol, deionized water, xylene and talcum powder are mixed according to the mass ratio of 30: 35: 5: 15:15, putting the mixture into an oven to be dried for 180min at 100 ℃, grinding the mixture into powder, filtering the powder by using a screen to obtain solid powder with the particle size of below 200-300 meshes, spraying the powder onto the surface of the pretreated plate by using an electrostatic powder spraying method (the parameters are the same as those in example 1), and measuring the spraying thickness by using a GB 1764-79 standard and a lever micrometer method, wherein the spraying thickness is 20 micrometers.
(3) Grinding polytetrafluoroethylene into powder, sieving the powder by a sieve with 100-200 meshes, and spraying the powder onto the bonding layer obtained in the step (2) by adopting an electrostatic powder spraying method (the parameters are the same as those in the example 1); the spray thickness was 35 μm.
(4) And baking the sprayed plate at 200 ℃ for 120min to obtain the plate of the fluorine-sprayed anti-corrosion plate heat exchanger. The resulting panel is schematically shown in figure 1.
And (3) placing the sprayed plate into a 15% hydrochloric acid solution to be soaked for 5 months at the temperature of 60 ℃, wherein no corrosive phenomenon appears on the surface of the plate, and the thickness of the plate is basically unchanged when measured. A plate of 304 stainless steel of the same thickness (0.6mm) was placed in the same hydrochloric acid atmosphere and the plate was severely penetrated by corrosion within 1 day.
The obtained plates are assembled into a total heat exchange area of 3m2The total heat transfer coefficient of the obtained fluorine-sprayed anti-corrosion plate heat exchanger subjected to a water-water heat exchange test is 4200W/(m)2·K)。
304 stainless steel plates with the same thickness (0.6mm) are assembled into a plate with the total heat exchange area of 3m2The plate heat exchanger has a total heat transfer coefficient of 4600W/(m) measured under the same test conditions2·K)。
Example 4
Anticorrosion plate heat exchanger plate of sprayed Hastelloy
(1) Surface pretreatment: the method comprises the steps of pickling a newly-pressed 304 stainless steel plate with the plate thickness of 0.4mm in 40% oxalic acid aqueous solution, adding the newly-pressed 304 stainless steel plate into 10g/L sodium dodecyl benzene sulfonate aqueous solution, soaking and stirring, and naturally drying to obtain the plate with a glossy surface.
(2) Polyvinyl alcohol, ethanol, deionized water, xylene and talcum powder are mixed according to the mass ratio of 30: 30:15: 10:15, putting the mixture into an oven to be dried for 160min at the temperature of 100 ℃, grinding the mixture into powder, filtering the powder by using a screen to obtain solid powder below 200-300 meshes, spraying the powder on the surface of the pretreated plate by using an electrostatic powder spraying method (the parameters are the same as those in example 1), and measuring the spraying thickness by using a GB 1764-79 standard and a lever micrometer method, wherein the spraying thickness is 10 micrometers.
(3) Grinding the hastelloy into powder, sieving the powder by a sieve with 100-200 meshes, and spraying the powder onto the bonding layer obtained in the step (2) by adopting an electrostatic powder spraying method (the parameters are the same as those in the example 1); the spray thickness was 20 μm.
(4) And baking the sprayed plate at 200 ℃ for 150min to obtain the plate of the sprayed Hastelloy anti-corrosion plate heat exchanger.
And (3) placing the sprayed plate into 15% hydrochloric acid solution to be soaked for 5 months at the temperature of 60 ℃, wherein the surface of the plate is slightly corroded, the coating is damaged, and the thickness of the plate is basically unchanged. A plate of 304 stainless steel of the same thickness (0.4mm) was placed in the same hydrochloric acid atmosphere and the plate was severely penetrated by corrosion within 1 day.
The obtained plates are assembled into a total heat exchange area of 3m2The plate heat exchanger is used for water-water heat exchange tests, and the total heat transfer coefficient is 5500W/(m)2·K)。
304 stainless steel plates with the same thickness (0.4mm) are assembled into a plate with the total heat exchange area of 3m2The total heat transfer coefficient of the plate heat exchanger is 5600W/(m) under the same test condition2·K)。
Example 5
Anticorrosion plate heat exchanger plate of sprayed Hastelloy
(1) Surface pretreatment: the method comprises the steps of pickling a newly pressed 316L stainless steel plate with the plate thickness of 0.4mm in 40% oxalic acid aqueous solution, adding the newly pressed 316L stainless steel plate into 10g/L sodium dodecyl benzene sulfonate aqueous solution, soaking and stirring, and naturally drying to obtain the polished surface of the plate.
(2) Polyvinyl alcohol, ethanol, deionized water, xylene and talcum powder are mixed according to the mass ratio of 30: 45: 10: 5:10, uniformly mixing, placing into an oven, drying for 140min at 120 ℃, grinding into powder, filtering by using a screen to obtain solid powder below 200-300 meshes, spraying the powder onto the surface of the pretreated plate by using an electrostatic powder spraying method (the parameters are the same as those in example 1), and measuring the spraying thickness by using a GB 1764-79 standard and a lever micrometer method, wherein the spraying thickness is 10 micrometers.
(3) Grinding the hastelloy into powder, sieving the powder by a sieve with 100-200 meshes, and spraying the powder onto the bonding layer obtained in the step (2) by adopting an electrostatic powder spraying method (the parameters are the same as those in the example 1); the spray thickness was 20 μm.
(4) And baking the sprayed plate sheet for 180min at 150 ℃ to obtain the plate sheet of the sprayed Hastelloy anti-corrosion plate heat exchanger.
And (3) placing the sprayed plate into 15% hydrochloric acid solution to be soaked for 5 months at the temperature of 60 ℃, wherein the surface of the plate is slightly corroded, the coating is damaged, and the thickness of the plate is basically unchanged. A316L stainless steel plate of the same thickness (0.4mm) was placed in the same hydrochloric acid atmosphere and the plate was severely penetrated by corrosion within 7 days.
The obtained plates are assembled into a total heat exchange area of 3m2The plate heat exchanger is used for carrying out a water-water heat exchange test, and the total heat transfer coefficient is 5200W/(m)2·K)。
316L stainless steel plates with the same thickness (0.4mm) are assembled into a plate with the total heat exchange area of 3m2The total heat transfer coefficient measured under the same test condition of the plate heat exchanger is 5500W/(m)2·K)。
Example 6
Anticorrosion plate heat exchanger plate of sprayed Hastelloy
(1) Surface pretreatment: the method comprises the steps of pickling a newly-pressed 304 stainless steel plate with the plate thickness of 0.8mm in 40% oxalic acid aqueous solution, adding the newly-pressed 304 stainless steel plate into 10g/L sodium dodecyl benzene sulfonate aqueous solution, soaking and stirring, and naturally drying to obtain the plate with a glossy surface.
(2) Polyvinyl alcohol, ethanol, deionized water, xylene and talcum powder are mixed according to the mass ratio of 30: 30:10: 15:15, putting the mixture into an oven to be dried for 150min at 100 ℃, grinding the mixture into powder, filtering the powder by using a screen to obtain solid powder with the particle size of below 200-300 meshes, spraying the powder onto the surface of the pretreated plate by using an electrostatic powder spraying method (the parameters are the same as those in example 1), and measuring the spraying thickness by using a GB 1764-79 standard and a lever micrometer method, wherein the spraying thickness is 25 micrometers.
(3) Grinding the hastelloy into powder, sieving the powder by a sieve with 100-200 meshes, and spraying the powder onto the bonding layer obtained in the step (2) by adopting an electrostatic powder spraying method (the parameters are the same as those in the example 1); the spray thickness was 30 μm.
(4) And baking the sprayed plate at 180 ℃ for 160min to obtain the plate of the sprayed Hastelloy anti-corrosion plate heat exchanger.
And (3) placing the sprayed plate into 15% hydrochloric acid solution to be soaked for 5 months at the temperature of 60 ℃, wherein the surface of the plate is slightly corroded, the coating is damaged, and the thickness of the plate is basically unchanged. A plate of 304 stainless steel of the same thickness (0.8mm) was placed in the same hydrochloric acid atmosphere and the plate was severely penetrated by corrosion within 1 day.
The obtained plates are assembled into a total heat exchange area of 3m2The plate heat exchanger is used for carrying out a water-water heat exchange test, and the total heat transfer coefficient is 4000W/(m)2·K)。
304 stainless steel plates with the same thickness (0.8mm) are assembled into a plate with the total heat exchange area of 3m2The total heat transfer coefficient of the plate heat exchanger is 4200W/(m) measured under the same test conditions2·K)。
Example 7
Compared with example 1, the difference is that the adhesive layer is not sprayed, or the spraying thickness of the adhesive layer is different (the spraying thickness is from 5 μm to 35 μm), the anticorrosive layer and other process conditions are the same as those of example 1, and the sheet prepared is examined for anticorrosive performance, and the results are shown in table 1.
TABLE 1
The obtained plates are assembled into a total heat exchange area of 3m2The plate heat exchanger of (1) was subjected to a water-water heat exchange test, and the obtained total heat transfer coefficient under the same test conditions as in example 1 is shown in table 2.
TABLE 2
It can be seen from the above comparative tests that under the same conditions of other processes, when no bonding layer is formed, the corrosion resistance is poor due to the fact that the anticorrosive layer is easy to fall off, the spraying thickness of the bonding layer is better at 10-25 μm, the spraying thickness is too thin, long-term corrosion resistance is not facilitated, the high-temperature corrosion resistance is poor, the adhesion force is too thick, the adhesion force is easy to fall off, the corrosion resistance and the high-temperature corrosion resistance are poor, and the thicker the spraying thickness is, the poorer the heat exchange performance is.
Example 8
Compared with the embodiment 1, the difference lies in that the composition of the bonding layer is different, specifically, as shown in table 3, the spraying thickness, the anticorrosive layer and other process conditions are the same as those of the embodiment 1, the prepared sheet is examined for the anticorrosive performance, and the obtained sheet is assembled into the sheet with the total heat exchange area of 3m2The plate heat exchanger of (1) was subjected to a water-water heat exchange test under the same test conditions as in example 1, and the results are shown in table 4.
TABLE 3
TABLE 4
The experimental results show that the composition of the bonding layer has important influence on the corrosion resistance and the high-temperature corrosion resistance, and also has certain influence on the heat transfer performance.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. The sheet bar of the corrosion-resistant plate heat exchanger is characterized in that a bonding layer and a corrosion-resistant layer are sequentially sprayed on the surface of the sheet bar;
the adhesive layer comprises polyvinyl alcohol, xylene and talcum powder, and the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30: (5-15): (10-15); the raw materials of the bonding layer consist of polyvinyl alcohol, dimethylbenzene, talcum powder, ethanol and water; the thickness of the bonding layer is 5-40 mu m;
the material of the anticorrosive layer is one or more of fluororesin, nickel-palladium alloy, graphite and hastelloy; the thickness of the anticorrosive coating is 15-35 mu m.
2. A plate sheet of an anti-corrosion plate heat exchanger according to claim 1, wherein the material of the plate sheet is 304 stainless steel or 316L stainless steel;
and/or the thickness of the plate sheet is 0.4-0.8 mm.
3. A plate sheet for a corrosion-resistant plate heat exchanger according to claim 1, wherein the adhesive layer is composed of polyvinyl alcohol, xylene, and talc.
4. The plate sheet of the corrosion-resistant plate heat exchanger according to claim 1, wherein in the components of the bonding layer, the mass ratio of polyvinyl alcohol, xylene and talcum powder is 30:15: 10;
or in the components of the bonding layer, the mass ratio of polyvinyl alcohol, xylene and talcum powder is 30:5: 10;
or in the components of the bonding layer, the mass ratio of polyvinyl alcohol, xylene and talcum powder is 30:15: 15;
or in the components of the bonding layer, the mass ratio of the polyvinyl alcohol to the xylene to the talcum powder is 30:10: 15.
5. The plate sheet of an anticorrosive plate heat exchanger according to claim 1, wherein the thickness of the adhesive layer is 10 to 25 μm.
6. An anticorrosion treatment method for a plate sheet of an anticorrosion plate heat exchanger as claimed in any one of claims 1 to 5, comprising:
(1) the sheet bar of the corrosion-resistant plate heat exchanger is subjected to surface pretreatment;
(2) spraying a bonding layer:
uniformly mixing the raw materials of the bonding layer, drying, grinding into powder, sieving with a 200-300-mesh sieve, and spraying onto the surface of the plate sheet obtained in the step (1) by using an electrostatic powder spraying method;
the raw materials of the bonding layer consist of polyvinyl alcohol, dimethylbenzene, talcum powder, ethanol and water;
(3) spraying a corrosion-resistant layer:
grinding one or more of fluororesin, nickel-palladium alloy, graphite and hastelloy into powder, and spraying the powder onto the bonding layer obtained in the step (2) by adopting an electrostatic powder spraying method after passing through a 100-200-mesh sieve;
(4) and baking the sprayed sheet at 150-200 ℃ for 120-180 min.
7. The corrosion prevention treatment method for a plate sheet of a corrosion prevention plate heat exchanger according to claim 6, wherein in the step (1), the surface pretreatment comprises: and (3) after acid washing in an acid medium, adding the mixture into a solution containing a surfactant, soaking and stirring, and airing.
8. The anticorrosion treatment method for the plate sheet of the anticorrosion plate heat exchanger as recited in claim 7, wherein the acidic medium is an oxalic acid aqueous solution with a mass fraction of 20-50%;
and/or the solution containing the surfactant is a sodium dodecyl benzene sulfonate aqueous solution with the concentration of 2-10 g/L.
9. The anticorrosion treatment method for a sheet of an anticorrosion plate heat exchanger as recited in claim 6, wherein in the raw materials of the adhesion layer, the mass ratio of polyvinyl alcohol, xylene, talc, ethanol and water is 30: (5-15): (10-15): (30-50): (5-15).
10. The anticorrosion treatment method for a sheet of an anticorrosion plate heat exchanger as recited in claim 6, wherein in the raw materials of the adhesion layer, the mass ratio of polyvinyl alcohol, xylene, talc, ethanol and water is 30:15: 10: 40: 5;
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:5: 10: 50: 5;
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:15: 15: 35: 5;
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:10: 15: 30: 15;
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:5: 10: 45: 10;
or in the raw materials of the bonding layer, the mass ratio of polyvinyl alcohol, xylene, talcum powder, ethanol and water is 30:15: 15: 30: 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811341222.4A CN109489471B (en) | 2018-11-12 | 2018-11-12 | Sheet bar of anti-corrosion plate type heat exchanger and anti-corrosion treatment method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811341222.4A CN109489471B (en) | 2018-11-12 | 2018-11-12 | Sheet bar of anti-corrosion plate type heat exchanger and anti-corrosion treatment method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109489471A CN109489471A (en) | 2019-03-19 |
| CN109489471B true CN109489471B (en) | 2020-05-05 |
Family
ID=65695795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811341222.4A Active CN109489471B (en) | 2018-11-12 | 2018-11-12 | Sheet bar of anti-corrosion plate type heat exchanger and anti-corrosion treatment method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109489471B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381706A (en) * | 2002-04-26 | 2002-11-27 | 龙口市金穗铜铝材厂 | Nano anticrossion technology for heat radiator by spraying on its inner surface |
| CN103242778A (en) * | 2013-04-27 | 2013-08-14 | 苏州市德莱尔建材科技有限公司 | Glass sealing glue and preparation method thereof |
| JP2013174413A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Heavy Ind Ltd | Steel member covering layer and surface treatment method for heat transfer tube |
| CN205173859U (en) * | 2015-11-24 | 2016-04-20 | 河北省盐山县电力管件有限公司 | Novel steel pipe spare of three -layer polypropylene outer anti -corrosion coating |
| CN205403546U (en) * | 2016-03-02 | 2016-07-27 | 天津爱尔普科技发展有限公司 | Anticorrosive pressure -resisting pipe shell type heat exchanger |
| CN206891257U (en) * | 2017-05-22 | 2018-01-16 | 张家港市江南利玛特设备制造有限公司 | A kind of seawater corrosion resistance heat exchanger tube |
-
2018
- 2018-11-12 CN CN201811341222.4A patent/CN109489471B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1381706A (en) * | 2002-04-26 | 2002-11-27 | 龙口市金穗铜铝材厂 | Nano anticrossion technology for heat radiator by spraying on its inner surface |
| JP2013174413A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Heavy Ind Ltd | Steel member covering layer and surface treatment method for heat transfer tube |
| CN103242778A (en) * | 2013-04-27 | 2013-08-14 | 苏州市德莱尔建材科技有限公司 | Glass sealing glue and preparation method thereof |
| CN205173859U (en) * | 2015-11-24 | 2016-04-20 | 河北省盐山县电力管件有限公司 | Novel steel pipe spare of three -layer polypropylene outer anti -corrosion coating |
| CN205403546U (en) * | 2016-03-02 | 2016-07-27 | 天津爱尔普科技发展有限公司 | Anticorrosive pressure -resisting pipe shell type heat exchanger |
| CN206891257U (en) * | 2017-05-22 | 2018-01-16 | 张家港市江南利玛特设备制造有限公司 | A kind of seawater corrosion resistance heat exchanger tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109489471A (en) | 2019-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102070927B (en) | Water-based surface treatment agent for color coating pretreatment of galvanized plates | |
| CN104629603B (en) | The metal conditioner and corrosion-resistant coating preparation method of graphene-containing | |
| CN101525514B (en) | Resin anti-corrosive paint | |
| CN104629510B (en) | The coating peeled off the preparation method of boron nitride anticorrosive paint and its obtain, the application of coating | |
| CN109127328B (en) | Method for constructing super-hydrophobic coating on metal surface | |
| CN103952732A (en) | Metal super-hydrophobic surface and preparation method thereof | |
| CN104693853B (en) | Metal surface anti-corrosion antibiotic paint and heat exchanger | |
| CN109778286A (en) | A kind of preparation method of Sintered NdFeB magnet surface corrosion-resistant erosion protective coating | |
| WO2022148284A1 (en) | Heat exchanger and preparation method therefor, and heat management system | |
| CN109761584A (en) | A kind of graphene oxide hydridization aluminium oxide Preparing Anti-corrosion Ceramic Coating and preparation method | |
| CN109489471B (en) | Sheet bar of anti-corrosion plate type heat exchanger and anti-corrosion treatment method thereof | |
| CN104451632B (en) | A kind of galvanized steel plain sheet low-temperature passivation agent and preparation method thereof | |
| CN110205008A (en) | A kind of chromium-free fingerprint-resistant inorganic agent | |
| CN101934268A (en) | Method for preparing magnesium alloy surface super-hydrophobic anticorrosion functional film | |
| CN114958150B (en) | Antistatic anticorrosive paint for petroleum pipeline and preparation method thereof | |
| CN108178984B (en) | High-temperature-resistant heavy-duty anticorrosive paint for stainless steel | |
| CN110804396B (en) | Anticorrosive paint and preparation method and application thereof | |
| CN108864896A (en) | anti-corrosion steel plate and preparation method thereof | |
| CN101214611B (en) | Method for manufacturing coating corrosion prevention heat exchanger | |
| CN107760181B (en) | Anti-halogen-back color steel plate and manufacturing method thereof | |
| CN109127330B (en) | Preparation method of metal surface super-hydrophobic coating | |
| CN102732124A (en) | Fluorine-containing heavy-duty anticorrosive coating and its application | |
| CN110484072A (en) | A kind of anticorrosive paint and its application method applied in aluminum alloy surface | |
| CN109622340A (en) | A kind of production method of conduction Coil Coating Products | |
| CN111054605B (en) | Metal material surface treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240129 Address after: No. 9260 Xinge Road, Xinqiao Town, Songjiang District, Shanghai, 201600 Patentee after: Shanghai Haomu Carbon Jia Energy saving Equipment Co.,Ltd. Country or region after: China Address before: 201505 room 277, 1st floor, building 1, 350 Xianxia Road, Changning District, Shanghai Patentee before: HAOMU (SHANGHAI) ENERGY SAVING TECHNOLOGY CO.,LTD. Country or region before: China |