CN111644355A - Plate heat exchanger coating treatment process - Google Patents
Plate heat exchanger coating treatment process Download PDFInfo
- Publication number
- CN111644355A CN111644355A CN202010512794.5A CN202010512794A CN111644355A CN 111644355 A CN111644355 A CN 111644355A CN 202010512794 A CN202010512794 A CN 202010512794A CN 111644355 A CN111644355 A CN 111644355A
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- Prior art keywords
- heat exchanger
- plate heat
- coating
- spraying
- plate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0278—Arrangement or mounting of spray heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a plate heat exchanger coating treatment process, which comprises the following steps: s1, cleaning the inner plate surface of the plate heat exchanger, S2, carrying out first electrostatic spraying on the plate heat exchanger with the clean inner plate surface and no impurities, S3, carrying out second electrostatic spraying on the plate heat exchanger subjected to the first spraying obtained in the previous step, S4, carrying out third electrostatic spraying on the plate heat exchanger subjected to the second spraying obtained in the previous step, putting chromium nitride coating into an electrostatic spray gun, and uniformly spraying the chromium nitride coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to coating treatment; the coating adopts a multilayer composite structure, each coating is uniformly coated through electrostatic spraying, the polyurea coating on the bottom layer improves the binding force of the coating, the reliability is high, the nickel-graphene oxide coating improves the wear resistance of the inner plate surface, and the chromium nitride coating on the surface improves the corrosion resistance of the inner plate surface; the coating treatment device is adopted to carry out coating treatment on the surface of the coating, and the cleaning and the three-layer coating are completed in a machine body, so that the efficiency is improved.
Description
Technical Field
The invention relates to the technical field of plate heat exchangers, in particular to a coating treatment process of a plate heat exchanger.
Background
The plate heat exchanger is a high-efficiency heat exchanger formed by stacking a series of metal sheets with certain corrugated shapes. Thin rectangular channels are formed between the various plates through which heat is exchanged. The plate heat exchanger is an ideal device for heat exchange of liquid-liquid and liquid-vapor. The plate heat exchanger is easily damaged due to corrosion of chemical substances such as chlorides, sulfides, nitrides, naphthenic acids and the like in crude oil in production and operation; in addition, working medium and medium temperature difference are great, under thermal stress corrosion, water corrosion and scouring action, the heat exchanger internal surface often suffers destruction, and life shortens, causes serious economic loss, and at present, the board heat exchanger realizes high temperature resistant anticorrosive through inner surface coating, but present board heat exchanger surface coating spraying effect is inhomogeneous, and the anticorrosive time is short when using, the phenomenon that can drop appears, and adsorption effect is not good simultaneously, make to have the gap between finish paint and the priming paint, thereby produce the phenomenon of corruption, consequently, influence the life of board heat exchanger.
Disclosure of Invention
The invention aims to provide a coating treatment process for a plate heat exchanger aiming at the defects in the prior art.
The technical scheme for solving the problems comprises the following steps: a plate heat exchanger coating treatment process comprising the steps of:
s1, cleaning the inner plate surface of the plate heat exchanger, and cleaning the impurities on the inner plate surface by using air flushing with the pressure of 200-300Kpa for 10-15min to obtain the plate heat exchanger with clean inner surface and no impurities;
s2, performing first electrostatic spraying on the obtained plate heat exchanger with the clean inner plate surface and no impurities, putting the polyaspartate polyurea coating into an electrostatic spray gun, and uniformly spraying the polyaspartate polyurea coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger after the first spraying;
s3, performing secondary electrostatic spraying on the plate heat exchanger subjected to the primary spraying obtained in the previous step, and when the plate heat exchanger subjected to the primary spraying is in a half-dry state, putting the nickel-graphene oxide coating into an electrostatic spray gun, and uniformly spraying the nickel-graphene oxide coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to the secondary spraying;
and S4, performing third electrostatic spraying on the plate heat exchanger subjected to the secondary spraying obtained in the previous step, putting the chromium nitride coating into an electrostatic spray gun, and uniformly spraying the chromium nitride coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to coating treatment.
The coating treatment process adopts a coating treatment device for treatment, the coating treatment device comprises a machine body, an opening and closing door hinged to the side wall of the machine body, a clamp arranged on the rear panel of the machine body, a high-pressure air injection device arranged in the machine body and a spraying device arranged in the machine body, and the inner panel surface of the plate heat exchanger is just opposite to the spraying device and clamped in the clamp.
Furthermore, the high-pressure gas injection device comprises a high-pressure gas injection pipe arranged in the machine body through a lifting device and a plurality of high-pressure gas injection heads connected to the high-pressure gas injection pipe.
Further, elevating gear is including setting up the elevator motor at the organism top, rotates the lifting screw who connects on organism roof and bottom plate and through shaft coupling and elevator motor output shaft through the bearing from top to bottom, and upper and lower fixed connection is the lift guide bar on organism roof and bottom plate, lifting screw and lift guide bar set up respectively in the anchor clamps both sides, the lifting screw top spin connects the lift union piece, the lift guide piece is established to the cover on the lift guide bar.
Furthermore, the lifting rotary connecting piece and the lifting guide piece are respectively arranged on two sides of the high-pressure gas ejector pipe.
Further, the spraying device comprises a mounting plate connected to the inner wall of the opening plate through a bolt, and a first electrostatic spray gun, a second electrostatic spray gun and a third electrostatic spray gun which are movably mounted on the mounting plate back and forth along the length direction of the mounting plate through a driving mechanism.
Further, actuating mechanism includes the mount pad of fixed connection at the positive both ends of mounting panel, and first drive screw, second drive screw and the third drive screw of connection between two mount pads are rotated through the bearing in both ends, and both ends fixed connection is at the horizontal guide bar between two mount pads, the output shaft of a driving motor is passed through the coupling joint respectively to the one end of first drive screw, second drive screw and third drive screw, first static spray gun lateral part is connected with the first drive of handing in soon on first drive screw and is revolved the piece and the first horizontal guide of slip cover on horizontal guide bar, second static spray gun lateral part is connected with the second drive of handing in soon on second drive screw and the second horizontal guide of slip cover on horizontal guide bar, third static spray gun lateral part is connected with the third drive of handing in soon on third drive screw and revolves the piece and the third horizontal guide of slip cover on horizontal guide bar.
Furthermore, the first electrostatic spray gun, the second electrostatic spray gun and the third electrostatic spray gun are respectively connected with three paint tanks arranged at the top of the machine body through hoses, and polyaspartic ester polyurea paint, nickel-graphene oxide paint and chromium nitride paint are respectively arranged in the three paint tanks.
The invention has the following beneficial effects:
the invention provides a plate heat exchanger coating treatment process, which is characterized in that the inner plate surface of a plate heat exchanger is coated with a coating, the coating adopts a multilayer composite structure, all the coatings are uniformly coated by electrostatic spraying, the bonding force of the coating is improved by a polyurea coating at the bottom layer, the reliability is high, the wear resistance of the inner plate surface is improved by a nickel-graphene oxide coating in the middle, and the corrosion resistance of the inner plate surface is improved by a chromium nitride coating on the surface; the coating treatment device is adopted to carry out coating treatment on the surface of the coating, and the cleaning and the three-layer coating are completed in a machine body, so that the efficiency is improved.
Drawings
FIG. 1 is a schematic view of a coating treatment apparatus used in the present invention;
FIG. 2 is a schematic view of the structure of the spray coating device;
FIG. 3 is a schematic view of the mounting structure of the first electrostatic spray gun, the second electrostatic spray gun and the third electrostatic spray gun;
in the figure: 1-machine body, 2-clamp, 3-plate heat exchanger, 4-high-pressure gas ejector, 5-lifting motor, 6-lifting screw, 7-lifting guide rod, 8-lifting screw, 9-lifting guide, 10-drive motor, 11-mounting plate, 12-first electrostatic spray gun, 13-second electrostatic spray gun, 14-third electrostatic spray gun, 15-mounting seat, 16-first drive screw, 17-second drive screw, 18-third drive screw, 19-first drive screw, 20-first transverse guide, 21-second drive screw, 22-second transverse guide, 23-third drive screw, 24-third transverse guide, 25-paint box, 26-transverse guide rod.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
A plate heat exchanger coating treatment process comprising the steps of:
s1, cleaning the inner plate surface of the plate heat exchanger, and cleaning the impurities on the inner plate surface by using air flushing with the pressure of 200-300Kpa for 10-15min to obtain the plate heat exchanger with clean inner surface and no impurities;
s2, performing first electrostatic spraying on the obtained plate heat exchanger with the clean inner plate surface and no impurities, putting the polyaspartate polyurea coating into an electrostatic spray gun, and uniformly spraying the polyaspartate polyurea coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger after the first spraying;
s3, performing secondary electrostatic spraying on the plate heat exchanger subjected to the primary spraying obtained in the previous step, and when the plate heat exchanger subjected to the primary spraying is in a half-dry state, putting the nickel-graphene oxide coating into an electrostatic spray gun, and uniformly spraying the nickel-graphene oxide coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to the secondary spraying;
and S4, performing third electrostatic spraying on the plate heat exchanger subjected to the secondary spraying obtained in the previous step, putting the chromium nitride coating into an electrostatic spray gun, and uniformly spraying the chromium nitride coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to coating treatment.
According to the invention, the inner plate surface of the plate heat exchanger is coated with the coating which adopts a multilayer composite structure, and each coating is uniformly coated through electrostatic spraying, the polyurea coating on the bottom layer improves the binding force of the coating, the reliability is high, the nickel-graphene oxide coating in the middle improves the wear resistance of the inner plate surface, and the chromium nitride coating on the surface improves the corrosion resistance of the inner plate surface.
The coating treatment process adopts a coating treatment device for treatment, the coating treatment device comprises a machine body, an opening and closing door hinged to the side wall of the machine body, a clamp arranged on the rear panel of the machine body, a high-pressure air injection device arranged in the machine body and a spraying device arranged in the machine body, and the inner panel surface of the plate heat exchanger is clamped in the clamp just opposite to the spraying device;
the high-pressure air injection device comprises a high-pressure air injection pipe arranged in the machine body through a lifting device and a plurality of high-pressure air injection heads connected to the high-pressure air injection pipe, the lifting device comprises a lifting motor arranged at the top of the machine body, lifting screw rods which are connected to a top plate and a bottom plate of the machine body in a rotating mode through bearings and connected with an output shaft of the lifting motor through a coupler, and lifting guide rods which are fixedly connected to the top plate and the bottom plate of the machine body from top to bottom, wherein the lifting screw rods and the lifting guide rods are respectively arranged on two sides of the clamp;
spraying device includes through bolted connection the mounting panel on the open-close plate inner wall and makes a round trip movable mounting through actuating mechanism along mounting panel length direction and make a round trip first static spray gun, second static spray gun and third static spray gun on the mounting panel, actuating mechanism includes the mount pad of fixed connection at the positive both ends of mounting panel, and the bearing is passed through at both ends and rotates first drive screw, second drive screw and the third drive screw of connection between two mount pads, and the horizontal guide bar of both ends fixed connection between two mount pads, the output shaft of a coupling joint driving motor is passed through respectively to the one end of first drive screw, second drive screw and third drive screw, first static spray gun lateral part is connected with and connects soon with the first horizontal guide piece of sliding sleeve on horizontal guide bar with the first drive of connecing soon on first drive screw, second static spray gun lateral part is connected with and connects soon with the second drive of connecing and the sliding sleeve on second drive screw soon The second transverse guiding piece is arranged on the transverse guiding rod, the side portion of the third electrostatic spray gun is connected with a third driving rotary connecting piece which is in rotary connection with a third driving screw rod, and a third transverse guiding piece which is sleeved on the transverse guiding rod in a sliding mode, the first electrostatic spray gun, the second electrostatic spray gun and the third electrostatic spray gun are respectively connected with three paint boxes arranged at the top of the machine body through hoses, and polyaspartic ester polyurea paint, nickel-graphene oxide paint and chromium nitride paint are respectively arranged in the three paint boxes.
The coating treatment device is characterized in that the open-close board is firstly opened when in use, the board heat exchanger is clamped on the clamp, the inner board faces the open-close board, the high-pressure air injection device is firstly used for cleaning the inner board face from top to bottom, then the high-pressure air injection device is lifted to the upper part, then the first electrostatic spray gun, the second electrostatic spray gun and the third electrostatic spray gun are used for spraying the inner board face in sequence, and the cleaning and the three-layer coating are completed in a machine body, so that the efficiency is improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (8)
1. A plate heat exchanger coating treatment process is characterized in that: the method comprises the following steps:
s1, cleaning the inner plate surface of the plate heat exchanger, and cleaning the impurities on the inner plate surface by using air flushing with the pressure of 200-300Kpa for 10-15min to obtain the plate heat exchanger with clean inner surface and no impurities;
s2, performing first electrostatic spraying on the obtained plate heat exchanger with the clean inner plate surface and no impurities, putting the polyaspartate polyurea coating into an electrostatic spray gun, and uniformly spraying the polyaspartate polyurea coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger after the first spraying;
s3, performing secondary electrostatic spraying on the plate heat exchanger subjected to the primary spraying obtained in the previous step, and when the plate heat exchanger subjected to the primary spraying is in a half-dry state, putting the nickel-graphene oxide coating into an electrostatic spray gun, and uniformly spraying the nickel-graphene oxide coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to the secondary spraying;
and S4, performing third electrostatic spraying on the plate heat exchanger subjected to the secondary spraying obtained in the previous step, putting the chromium nitride coating into an electrostatic spray gun, and uniformly spraying the chromium nitride coating on the inner surface of the plate heat exchanger to obtain the plate heat exchanger subjected to coating treatment.
2. A plate heat exchanger coating treatment process according to claim 1, characterized in that: the coating treatment process adopts a coating treatment device for treatment, the coating treatment device comprises a machine body, an opening and closing door hinged to the side wall of the machine body, a clamp arranged on the rear panel of the machine body, a high-pressure air injection device arranged in the machine body and a spraying device arranged in the machine body, and the inner panel surface of the plate heat exchanger is just opposite to the spraying device and clamped in the clamp.
3. A plate heat exchanger coating treatment process according to claim 2, characterized in that: the high-pressure air injection device comprises a high-pressure air injection pipe arranged in the machine body through a lifting device and a plurality of high-pressure air injection heads connected to the high-pressure air injection pipe.
4. A plate heat exchanger coating treatment process according to claim 3, characterized in that: the lifting device comprises a lifting motor arranged at the top of the machine body, a lifting screw rod which is connected to a top plate and a bottom plate of the machine body in a rotating mode through a bearing from top to bottom and is connected with an output shaft of the lifting motor through a coupler, and lifting guide rods which are fixedly connected to the top plate and the bottom plate of the machine body from top to bottom, wherein the lifting screw rod and the lifting guide rods are arranged on two sides of the clamp respectively, a lifting screwed piece is screwed on the lifting screw rod, and the lifting guide piece is sleeved on the lifting guide rods.
5. A plate heat exchanger coating treatment process according to claim 4, characterized in that: the lifting rotary connecting piece and the lifting guide piece are respectively arranged on two sides of the high-pressure gas ejector pipe.
6. A plate heat exchanger coating treatment process according to claim 2, characterized in that: the spraying device comprises a mounting plate connected to the inner wall of the opening plate through a bolt, and a first electrostatic spray gun, a second electrostatic spray gun and a third electrostatic spray gun which are movably mounted on the mounting plate along the length direction of the mounting plate through a driving mechanism in a back-and-forth mode.
7. A plate heat exchanger coating treatment process according to claim 6, characterized in that: the driving mechanism comprises mounting seats fixedly connected with the two ends of the front surface of the mounting plate, a first driving screw rod, a second driving screw rod and a third driving screw rod which are rotatably connected between the two mounting seats at the two ends through bearings, a transverse guide rod which is fixedly connected between the two mounting seats at the two ends, one end of the first driving screw rod, one end of the second driving screw rod and one end of the third driving screw rod are respectively connected with an output shaft of a driving motor through a coupler, the side part of the first electrostatic spray gun is connected with a first driving rotary connecting piece which is connected with a first driving screw rod in a rotary mode and a first transverse guide piece which is sleeved on a transverse guide rod in a sliding mode, the side part of the second electrostatic spray gun is connected with a second driving rotary connecting piece which is connected with a second driving screw rod in a rotary mode and a second transverse guide piece which is sleeved on the transverse guide rod in a sliding mode, and the side part of the third electrostatic spray gun is connected with a third driving rotary connecting piece which is in rotary connection with a third driving screw rod and a third transverse guide piece which is sleeved on the transverse guide rod in a sliding manner.
8. A plate heat exchanger coating treatment process according to claim 6 or 7, characterized in that: the first electrostatic spray gun, the second electrostatic spray gun and the third electrostatic spray gun are respectively connected with three paint tanks arranged at the top of the machine body through hoses, and polyaspartic ester polyurea paint, nickel-graphene oxide paint and chromium nitride paint are respectively arranged in the three paint tanks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010512794.5A CN111644355A (en) | 2020-06-08 | 2020-06-08 | Plate heat exchanger coating treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010512794.5A CN111644355A (en) | 2020-06-08 | 2020-06-08 | Plate heat exchanger coating treatment process |
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| CN111644355A true CN111644355A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010512794.5A Pending CN111644355A (en) | 2020-06-08 | 2020-06-08 | Plate heat exchanger coating treatment process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119680801A (en) * | 2025-02-26 | 2025-03-25 | 江苏百澄特种钢管制造有限公司 | A spraying device for anti-corrosion treatment of seamless steel pipe surface |
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| CN119680801A (en) * | 2025-02-26 | 2025-03-25 | 江苏百澄特种钢管制造有限公司 | A spraying device for anti-corrosion treatment of seamless steel pipe surface |
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Application publication date: 20200911 |