CN217816856U

CN217816856U - Combustion-supporting air heater for industrial furnace

Info

Publication number: CN217816856U
Application number: CN202221852746.1U
Authority: CN
Inventors: 周小国; 陆伟; 陶健; 孙志超
Original assignee: JIANGSU YANXIN SCI-TECH CO LTD
Current assignee: JIANGSU YANXIN SCI-TECH CO LTD
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-15
Anticipated expiration: 2032-07-19

Abstract

The utility model relates to a combustion air heater for industrial furnace, including snakelike finned tube and components of a whole that can function independently welded tube sheet, a plurality of snakelike finned tubes set up between two components of a whole that can function independently welded tube sheets, snakelike finned tube is buckled by interval welded fin's steel pipe and is formed, and fin top-down sets up the straight section of steel pipe after buckling, components of a whole that can function independently welded tube sheet is formed by middle burst tube sheet and the welding of outer burst tube sheet, and burst tube sheet setting is between two outer burst tube sheets in the middle of at least one, the inboard of middle burst tube sheet both sides, outer burst tube sheet corresponds the steel pipe and all is equipped with the arc wall. The utility model has the advantages that the steel pipe is bent after the fins are welded on the seamless steel pipe at intervals, the pipe plate is split-type assembled and welded, the manufacture is simple, the butt welding seam and the number of inspection shots are reduced, and the comprehensive cost is low; has the function of online ash removal, and is very suitable for industrial furnaces which need long-period uninterrupted operation.

Description

Combustion-supporting air heater for industrial furnace

Technical Field

The utility model relates to an air heating technical field, concretely relates to combustion-supporting air heater for industrial furnace is applied to petrochemical tubular heating furnace, all kinds of boilers like the combustion-supporting air heater for heating system of industrial boiler, power plant boiler, industrial furnace kiln etc..

Background

In various industrial furnace applications, a means of increasing the temperature of combustion-supporting air to increase the thermal efficiency of the furnace is generally adopted at present, so that the aims of saving fuel and reducing the total emission amount of pollutants are fulfilled.

In the conventional air heater, as shown in fig. 1, fin straight tubes 5 are arranged in an array, two ends of each fin straight tube 5 are inserted into corresponding insertion holes of an integral tube plate 6, so that the fin straight tubes 5 and the integral tube plate 6 are assembled into a whole, then the end openings of each vertical fin straight tube 5 are welded through a U-shaped connecting elbow 7 to form a snake-shaped finned tube, and after the welding is finished, all welding seams need to be subjected to corresponding quality detection and shooting to ensure that the welding seams are qualified in quality. The air heater with the structure has the advantages of more butt welding seams, large number of test shooting pieces, high manufacturing cost, long manufacturing time and low production efficiency. In addition, the fins on the fin straight tubes are difficult to clean after dust is deposited, and the deposited dust can reduce the heat exchange performance of the air heater.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned not enough, provide a combustion air heater for industrial furnace, buckle to the steel pipe again behind the high-frequency spiral welding fin on seamless steel pipe, reduced butt weld, reduce inspection film quantity, low in manufacturing cost, production efficiency obtains effectively improving, has increased the brush that can online deashing simultaneously, guarantees air heater's heat transfer performance.

The purpose of the utility model is realized like this:

the utility model provides a combustion-supporting air heater for industrial furnace, includes snakelike finned tube and components of a whole that can function independently welded tube sheet, a plurality of snakelike finned tubes set up between two components of a whole that can function independently welded tube sheets, snakelike finned tube is buckled by the steel pipe of high frequency spiral welding fin and is formed, and fin top-down sets up the straight section of steel pipe after buckling, components of a whole that can function independently welded tube sheet is formed by middle burst tube sheet and the welding of outer burst tube sheet, and at least one middle burst tube sheet sets up between two outer burst tube sheets, middle burst tube sheet both sides, the inboard of outer burst tube sheet all are equipped with the arc wall corresponding to the steel pipe.

Preferably, after the middle partition tube plate and the outer partition tube plate are spliced with the snakelike finned tube, the middle partition tube plate and the outer partition tube plate are welded.

Preferably, the straight section of the steel pipe with the fins is arranged between the two split welded pipe plates, and the bent section of the steel pipe is arranged outside the two split welded pipe plates.

Preferably, a brush is further arranged between the two split welding type tube plates, and brush holes are formed in the inner split tube plates.

Preferably, the outlet ends and the inlet ends of the serpentine finned tubes are arranged on the same side, the outlet ends of the serpentine finned tubes are connected with a collecting pipe, and the inlet ends of the serpentine finned tubes are connected with another collecting pipe.

The utility model has the advantages that:

the utility model has the advantages that the steel pipe is bent after the high-frequency spiral welding fins are welded on the seamless steel pipe, the pipe plate is split-type assembled and welded, the manufacturing is simple, the butt weld and the checking and shooting quantity are reduced, and the comprehensive cost is low; has the function of online ash removal, and is very suitable for industrial furnaces which need long-period uninterrupted operation.

Drawings

Fig. 1 is a schematic view illustrating an assembly structure of an air heater in the related art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic view of the assembly structure of fig. 2.

FIG. 4 is a schematic view of the construction of a single serpentine finned tube.

FIG. 5 is a schematic view of an unbent serpentine finned tube.

Wherein: a serpentine finned tube 1; 1.1 parts of a steel pipe; a fin 1.2; a split welded tube plate 2; the middle partition tube plate 2.1; a brush hole; an outer partition tube plate 2.2; 2.3 of an arc-shaped groove; a brush 3; a collecting pipe 4; a fin straight tube 5; an integral tube sheet 6; u-shaped connecting elbow 7.

Detailed Description

Referring to fig. 2-5, the utility model relates to a combustion air heater for industrial furnace, including snakelike finned tube 1 and components of a whole that can function independently welded tube sheet 2, a plurality of snakelike finned tubes 1 are vertical to be set up between two components of a whole that can function independently welded tube sheet 2, and a plurality of snakelike finned tubes 1 longitudinal interval distributes, snakelike finned tube 1 includes steel pipe 1.1 and fin 1.2, form tortuous snakelike finned tube through buckling behind steel pipe 1.1 interval welded fin 1.2, fin 1.2 is located the straight section of steel pipe 1.1 after buckling, and fin 1.2 top-down sets up on the straight section of steel pipe 1.1, components of a whole that can function independently welded tube sheet 2 is formed by middle burst tube sheet 2.1 and the welding of outer burst tube sheet 2.2.2, and at least one middle burst tube sheet 2.1 sets up between two outer burst tube sheets 2.2, the inboard of middle burst tube sheet 2.1 both sides, outer burst tube sheet 2.2.2 corresponds steel pipe 1.1 and all is equipped with arc wall 2.3, the pipe diameter phase-match of arc wall 2.3 size and steel pipe 1.

The steel pipe 1.1 is welded with the fins 1.2 and then bent to form the snakelike finned tube 1, so that the welding difficulty of the fins is reduced, and butt welding seams are reduced because the steel pipe 1.1 is bent integrally and is not spliced.

After the middle partition tube plate 2.1 and the outer partition tube plate 2.2 are spliced with the snakelike finned tube 1, the middle partition tube plate 2.1 and the outer partition tube plate 2.2 are welded, so that the middle partition tube plate 2.1 and the outer partition tube plate 2.2 are welded to form the split welded tube plate 2. The snakelike finned tube 1 is not welded with the middle sliced tube plate 2.1 and the outer sliced tube plate 2.2.

The straight section of the steel pipe 1.1 with the fins 1.2 is arranged between the two split welded pipe plates 2, and the bent pipe section of the steel pipe 1.1 is arranged outside the two split welded pipe plates 2.

Still be equipped with brush 3 between two components of a whole that can function independently welded tube sheet 2, be equipped with the brush hole on the interior burst tube sheet 2.1, brush 3 gets into the brush hole of burst tube sheet 2.1 in the other end from the brush hole of burst tube sheet 2.1 in one end, carries out the deashing to fin 1.2, and 4 fins 1.2 about can accomplishing about one brush 3 carry out the deashing, have improved deashing efficiency, have guaranteed air heater's working property.

The outlet end and the inlet end of the serpentine finned tube 1 are arranged on the same side, the outlet ends of the serpentine finned tubes 1 are connected with a manifold 4, and the inlet ends of the serpentine finned tubes 1 are connected with another manifold 4.

The installation method comprises the following steps:

selecting a steel pipe with required length through process calculation, winding fins 1.2 required by surface expansion at a set position of the steel pipe by using a finned pipe high-frequency welding machine, and bending the finished finned pipe into a shape with the required arrangement size by using a pipe bending machine to form a snakelike finned pipe 1, so that butt welding seams are reduced;

the number of the snakelike finned tubes 1 is selected according to requirements, split welding type tube plates 2 are spliced and welded at the front end and the rear end of each snakelike finned tube 1, and the split welding type tube plates 2 are spliced with the middle split tube plate 2.1 and the outer split tube plate 2.2 and then welded.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A combustion air heater for industrial furnace is characterized in that: including snakelike finned tube and components of a whole that can function independently welded tube sheet, a plurality of snakelike finned tubes set up between two components of a whole that can function independently welded tube sheets, snakelike finned tube is buckled by the steel pipe of interval welding fin and is formed, and fin top-down sets up the straight section of steel pipe after buckling, components of a whole that can function independently welded tube sheet is formed by middle burst tube sheet and the welding of outer burst tube sheet, and at least one middle burst tube sheet sets up between two outer burst tube sheets, middle burst tube sheet both sides, the inboard of outer burst tube sheet correspond the steel pipe and all are equipped with the arc wall.

2. A combustion air heater for industrial furnaces according to claim 1, characterized in that: after the middle partition tube plate, the outer partition tube plate and the snakelike finned tube are spliced, the middle partition tube plate and the outer partition tube plate are welded.

3. The combustion air heater for the industrial furnace according to claim 1, wherein: the straight section of the steel pipe with the fins is arranged between the two split welded pipe plates, and the bent pipe section of the steel pipe is arranged outside the two split welded pipe plates.

4. A combustion air heater for industrial furnaces according to claim 1, characterized in that: a brush is arranged between the two split welding type tube plates, and a brush hole is formed in the middle split tube plate.

5. A combustion air heater for industrial furnaces according to claim 1, characterized in that: the outlet ends and the inlet ends of the serpentine finned tubes are arranged on the same side, the outlet ends of the serpentine finned tubes are connected with a manifold, and the inlet ends of the serpentine finned tubes are connected with another manifold.