CN215863510U - Welding flat tube type air preheater - Google Patents
Welding flat tube type air preheater Download PDFInfo
- Publication number
- CN215863510U CN215863510U CN202122204539.7U CN202122204539U CN215863510U CN 215863510 U CN215863510 U CN 215863510U CN 202122204539 U CN202122204539 U CN 202122204539U CN 215863510 U CN215863510 U CN 215863510U
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- flat
- air preheater
- flat tube
- plate
- welded
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a welded flat tube type air preheater which comprises a plurality of flat tubes, wherein the flat tubes are distributed in an array mode, two ends of each flat tube are connected with tube plates, the flat tubes are formed by oppositely welding two plate sheets, the cross sections of the plate sheets are in a shape like a Chinese character 'ji', the plate sheets comprise central sections and folded edges, the folded edges are symmetrically arranged at two ends of the central sections in the width direction, and socket supports are arranged on the inner side and the outer side of the central sections at equal intervals along the length direction. The utility model has the advantages of simple structure, high strength, small flow resistance, large heat transfer area in unit volume, low unit manufacturing cost and light weight of equipment.
Description
Technical Field
The utility model relates to the technical field of air preheaters, in particular to a welded flat tube type air preheater which is applied to a tubular air preheater in a flue gas waste heat recovery system of a petrochemical tubular heating furnace and various boilers (such as industrial boilers, power station boilers, industrial kilns and the like).
Background
In a flue gas waste heat recovery system of a petrochemical tubular heating furnace, a tubular air preheater is widely applied at present. Tubular air preheaters have the disadvantages of low heat transfer coefficient, high medium flow resistance, large equipment volume and heavy equipment weight.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and provides the welded flat tube type air preheater which is simple in structure, high in strength, small in flow resistance, large in heat transfer area in unit volume, low in unit manufacturing cost and light in equipment weight.
The purpose of the utility model is realized as follows:
the utility model provides a welding flat tube formula air heater, includes a plurality of flat pipes, a plurality of flat pipe array distribution, the both ends connecting tube board of flat pipe, flat pipe is formed by two relative welding of slab, the slab cross-section is nearly style of calligraphy, the slab includes central section and hem, the hem symmetry sets up the both ends at central section width direction, the inside and outside both sides of central section are equipped with nest form support along length direction interval equidistance.
Preferably, the socket-shaped supports are divided into socket-shaped supports and convex-socket-shaped supports, and the socket-shaped supports and the convex-socket-shaped supports are arranged in a staggered manner.
Preferably, the folded edges corresponding to the two sheets are mutually attached, and the attached folded edges are welded through high-frequency resistance welding to form a single flat pipe.
Preferably, the tube plate is provided with slots, and the two ends of the flat tube in the length direction are inserted into the slots and then fixed with the tube plate through argon arc welding.
Preferably, the shape and the size of the slot are matched with those of the flat pipe, and the slot is cut and formed by laser or a water jet cutter.
Preferably, the thickness of the plate sheet is 0.8-3mm, and the plate sheet is a flat plate or a contour plate.
Preferably, the surface of the plate is concave pits or ripples.
Preferably, the periphery of the outer side surface of the tube plate is provided with a heat exchange tube thermal expansion displacement compensation joint under the working condition, and the compensation joint is in a closed ring shape.
The utility model has the beneficial effects that:
the utility model has the advantages of simple structure, high strength, small flow resistance, large heat transfer area in unit volume, low unit manufacturing cost and light weight of equipment.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an assembly schematic of the present invention.
Fig. 3 is a schematic structural view of a single flat tube.
Fig. 4 is a schematic front view of the plate.
Fig. 5 is a schematic view of the back structure of the plate.
Wherein: flat tubes 1; 1.1 of a plate sheet; a central section 1.1.1; folding 1.1.2; dimple-shaped supports 1.1.3; dimple-shaped supports 1.1.4; a tube sheet 2; slot 2.1; and a compensating section 3.
Detailed Description
Referring to fig. 1-5, the utility model relates to a welded flat tube type air preheater, which comprises a plurality of flat tubes 1, wherein the flat tubes 1 are distributed in an array manner, two ends of each flat tube 1 are connected with a tube plate 2, the flat tubes 1 are formed by oppositely welding two plate sheets 1.1, the cross sections of the plate sheets 1.1 are in a shape like a Chinese character 'ji', each plate sheet 1.1 comprises a central section 1.1.1 and folded edges 1.1.2, the folded edges 1.1.2 are symmetrically arranged at two ends of the central section 1.1.1 in the width direction, socket-shaped supports are arranged at equal intervals in the length direction on the inner side and the outer side of the central section 1.1.1 along the length direction, each socket-shaped support is divided into a socket-shaped support 1.1.3 and a convex socket-shaped support 1.1.4, and the socket-shaped supports 1.1.3 and the convex socket-shaped supports 1.1.4 are arranged in a staggered manner.
The two sheets 1.1 are oppositely overlapped, the folded edges 1.1.2 corresponding to the two sheets 1.1 are mutually attached, and the attached folded edges 1.1.2 are welded by high-frequency resistance welding to form a single flat tube 1.
The nest form that two slab 1.1 correspond supports and laminates each other, plays the supporting role, has improved the intensity of flat tub of cavity, prevents that flat tub of cavity from warping. The nest form that corresponds between two adjacent flat pipes supports and laminates each other, also plays the supporting role, improves bulk strength.
Be equipped with slot 2.1 on the tube sheet 2, adopt argon arc welding to fix with tube sheet 2 after the both ends of flat pipe 1 length direction insert slot 2.1. The slot 2.1 plays a role in pre-installation and positioning, the shape and the size of the slot 2.1 are matched with those of the flat tube 1, and the slot 2.1 is formed by cutting with laser or a water jet.
The thickness of the plate sheet 1.1 is 0.8-3mm, and the plate sheet is a flat plate or a contour plate and is made of carbon steel or stainless steel.
The surface of the plate 1.1 is provided with pits or corrugations, so that the strength of the plate is improved, and the heat transfer effect is enhanced.
The pipe plate is characterized in that compensation sections 3 are arranged on the periphery of the outer side face of the pipe plate 2, the compensation sections 3 are closed and annular, the cross sections of the compensation sections 3 are in omega shapes, the compensation sections 3 are made of 304 materials, and the compensation sections 3 are used for absorbing thermal expansion displacement of the pipe group during high-temperature operation.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a welding flat tube formula air heater which characterized in that: including a plurality of flat pipes (1), a plurality of flat pipe (1) array distribution, tube sheet (2) are connected at the both ends of flat pipe (1), flat pipe (1) is formed by two slab (1.1) relative welding, slab (1.1) cross-section is several types of word, slab (1.1) is including central section (1.1.1) and hem (1.1.2), hem (1.1.2) symmetry sets up at the both ends of central section (1.1.1) width direction, the inside and outside both sides of central section (1.1.1) are equipped with nest form along length direction interval equidistance and support.
2. A welded flat tube air preheater according to claim 1, wherein: the socket-shaped supports are divided into socket-shaped supports (1.1.3) and convex-socket-shaped supports (1.1.4), and the socket-shaped supports (1.1.3) and the convex-socket-shaped supports (1.1.4) are arranged in a staggered manner.
3. A welded flat tube air preheater according to claim 1, wherein: the corresponding folded edges (1.1.2) of the two sheets (1.1) are mutually attached, and the attached folded edges (1.1.2) are welded by high-frequency resistance welding to form a single flat tube (1).
4. A welded flat tube air preheater according to claim 1, wherein: be equipped with slot (2.1) on tube sheet (2), adopt argon arc welding to fix with tube sheet (2) after slot (2.1) is inserted at the both ends of flat pipe (1) length direction.
5. A welded flat tube air preheater according to claim 4, wherein: the shape and the size of the slot (2.1) are matched with those of the flat pipe (1), and the slot (2.1) is cut and formed by laser or a water jet.
6. A welded flat tube air preheater according to claim 1, wherein: the thickness of the plate sheet (1.1) is 0.8-3mm, and the plate sheet is a flat plate or a contour plate.
7. A welded flat tube air preheater according to claim 6, wherein: the surface of the plate (1.1) is concave pits or ripples.
8. A welded flat tube air preheater according to claim 1, wherein: the periphery of the outer side surface of the tube plate (2) is provided with a compensation joint (3), and the compensation joint (3) is in a closed ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122204539.7U CN215863510U (en) | 2021-09-13 | 2021-09-13 | Welding flat tube type air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122204539.7U CN215863510U (en) | 2021-09-13 | 2021-09-13 | Welding flat tube type air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215863510U true CN215863510U (en) | 2022-02-18 |
Family
ID=80319421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122204539.7U Active CN215863510U (en) | 2021-09-13 | 2021-09-13 | Welding flat tube type air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215863510U (en) |
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2021
- 2021-09-13 CN CN202122204539.7U patent/CN215863510U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A welded flat tube air preheater Effective date of registration: 20220928 Granted publication date: 20220218 Pledgee: Jiangsu Jiangyin Rural Commercial Bank Co.,Ltd. Xinqiao sub branch Pledgor: JIANGSU YANXIN SCI-TECH Co.,Ltd. Registration number: Y2022320010556 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |