CN218236628U - Hot air pipeline shell of air preheater - Google Patents

Abstract

The utility model discloses a hot-blast pipeline casing of air heater, include: flange, casing, angle steel, support, slider, gyro wheel, guide rail. The improved hot air pipeline eliminates the problem that the shell is poor in strength and rigidity and deforms in the process of installation and transportation of pipe joints, further cracks and falls off due to extrusion of a castable and a refractory material, reduces the number of production stoppage and maintenance times and maintenance cost, and has practical significance for improving the yield of carbon black.

Description

Hot air pipeline shell of air preheater

Technical Field

The utility model relates to a carbon black trade technical field, concretely relates to air heater hot air line.

Background

In the production process of the carbon black, tail gas from a reaction furnace enters a heat exchange section tube side through an air preheater base to finish heat exchange with cold air entering a shell side, then the tail gas is discharged from an upper smoke box to enter subsequent equipment, and high-temperature air after heat exchange enters a combustor to support combustion through a hot air pipeline, so that the aim of saving energy is fulfilled. The hot air pipeline consists of an expansion joint, a plurality of groups of cylinder sections and elbows, and the like, wherein the cylinder sections are lined with heat insulation materials and refractory materials. The existing hot air pipeline generally has liner falling or cracks, and the production line stops. The analysis shows that: 1) The pipeline shell has a large diameter and a thin wall, each section of pipeline has a weight of about 3 tons, and the shell is easy to deform and extrude lining materials in the installation and transportation process; 2) The lining is made of different materials, namely three layers of heat preservation, pouring and refractory bricks, the expansion coefficients are different, the working temperature is up to 950 ℃, and if the lining has cracks or falls off, the lining can be burnt through quickly. Therefore, the hot air pipeline shell of the air preheater is designed, and the structure of the hot air pipeline shell is improved.

Disclosure of Invention

The utility model aims at designing a hot-blast pipeline casing of air heater, its technical scheme is:

an air preheater hot air line housing comprising: connecting segment 1, radial expansion joint 2, flange 3, casing 4, angle steel 5, support 6.0, backup pad 6.1, backplate 6.2, long riser 6.3, lug 6.4, short riser 6.5, bottom plate 6.6, slider 6.7, gyro wheel 6.8, guide rail 7, elbow 8, support 9, axial expansion joint 10, combustor 11, its characterized in that: the hot air pipeline pipe joint is formed by assembling and welding a flange (3), a shell (4), angle steel (5) and a support (6.0) and then assembling a sliding block (6.7) and a roller (6.8); two ends of the angle steel (5) are welded on the flange (3), and the middle of the angle steel is welded with the shell (4) discontinuously; the support (6.0) is assembled and welded by a support plate (6.1), a guard plate (6.2), a long vertical plate (6.3), a short vertical plate (6.5) and a bottom plate (6.6), a lifting lug (6.4) is welded on the long vertical plate (6.3), and a sliding block (6.7) and a roller (6.8) are connected on the bottom plate (6.6) by bolts; the slide block (6.7) and the track (7) adopt a convex-concave inclined plane slideway structure; the sliding block (6.7) slides on the guide rail (7) of the bracket (9); the roller (6.8) can rotate.

The design points of the utility model are:

1. the strength and the rigidity of the shell are improved by using angle steel, so that the shell is ensured not to deform;

2. a sliding block is arranged in the middle of the bottom of the support and slides on a support guide rail to prevent the whole pipeline from deviating from the moving direction;

3. rotatable rollers are arranged on two sides of the bottom of the support, so that the expansion between all cylinder sections of the whole pipeline is ensured without blocking and extrusion stress;

4. the damage to the inner lining casting material and the refractory material in the hoisting, transporting and installing processes is eliminated.

The utility model has the advantages of:

1. the cracking and falling off caused by the extrusion of the casting material and the refractory material due to the deformation of the shell are eliminated;

2. the whole hot air pipeline moves in a telescopic way according to the guide rail in the working process, and all the cylinder sections are in an unstressed state;

3. the lifting lugs are arranged on the base, and the lifting process has no influence on the shell;

4. the hot air pipeline shell is mainly used for fixing the casting material and the refractory material together and is free from the action of external force, and the structural shell has better effect than that of simply increasing the wall thickness of the shell;

5. two big problems that present hot-blast pipeline exists have been solved, promptly: the strength and the rigidity of the shell are poor, and the shell deforms, is extruded and poured and is made of refractory materials in the hoisting and transportation process;

6. after the shell structure is improved, the original problems are solved, the production stop maintenance times and the maintenance cost are reduced, and the improvement of the carbon black capacity is of practical significance.

Drawings

FIG. 1 the utility model discloses a hot-blast pipeline casing schematic diagram of air heater

FIG. 2 isbase:Sub>A view taken from A-A in FIG. 1

FIG. 3 is a mark in the B-B hoisting schematic diagram in FIG. 1: 1-connecting section, 2-radial expansion joint, 3-flange, 4-shell, 5-angle steel, 6.0-support, 6.1-support plate, 6.2-guard plate, 6.3-long vertical plate, 6.4-lifting lug, 6.5-short vertical plate, 6.6-bottom plate, 6.7-slide block, 6.8-roller, 7-guide rail, 8-elbow, 9-support, 10-axial expansion joint and 11-burner,

d-a cold air inlet and c-a hot air outlet.

Detailed Description

An air preheater hot air line housing comprising: 3-flange, 4-shell, 5-angle steel, 6.0-support, 6.1-support plate, 6.2-guard plate, 6.3-long vertical plate, 6.4-lifting lug, 6.5-short vertical plate, 6.6-bottom plate, 6.7-slide block, 6.8-roller, 7-guide rail and 9-support.

The specific implementation process comprises the following steps:

1. the preparation method comprises the following steps:

1.1 blanking: the device comprises a flange 3, a shell 4, angle steel 5, a support plate 6.1, a guard plate 6.2, a long vertical plate 6.3, a lifting lug 6.4, a short vertical plate 6.5, a bottom plate 6.6, a sliding block 6.7 and a guide rail 7;

1.2 processing: the flange 3, the lifting lug 6.4, the sliding block 6.7 and the guide rail 7;

2. welding:

2.1 part: a support 6.0 is formed by assembling and welding a support plate 6.1, a guard plate 6.2, a long vertical plate 6.3, a lifting lug 6.4, a short vertical plate 6.5 and a bottom plate 6.6, and the support is formed by assembling and welding a flange 3, a shell 4 and angle steel 5 together;

2.2 assembling and welding parts: the support 6.0 and the shell 4 are assembled and welded to form a hot air pipeline pipe joint;

2. outsourcing or outsourcing: 6.8 of a roller, a fastener and a graphite packing rope;

3. installation:

3.1, in-plant installation: the support 6.0 is connected with the roller 6.8 and the slide block 6.7 by bolts;

3.2 field installation: 1) The guide rail 7 is arranged on the bracket 9 by a fastener; 2) Hoisting each section of pipe joint which is well subjected to heat preservation, pouring and refractory material on a guide rail 7 of a support 9, and ensuring that a convex inclined plane of a sliding block 6.7 is arranged in a concave inclined plane of the guide rail 7; 3) The sealing surface is wound by a graphite packing rope between each section of pipe joint and then is fastened by a fastening piece;

3.3 insulating layer, casting material and refractory material: according to the user condition, the product is made before leaving factory or on site;

3.4, the hoisting belt can not be tied to the shell 4 in the carrying process strictly according to the hoisting requirement;

4. and (4) checking:

4.1 the straightness of the installed pipeline does not exceed the process requirement range;

4.2 after the inspection is qualified, spraying high-temperature paint on the surface of the hot air pipeline again according to requirements.

Claims (4)

1. An air preheater hot air line housing comprising: flange (3), casing (4), angle steel (5), support (6.0), backup pad (6.1), backplate (6.2), long riser (6.3), lug (6.4), short riser (6.5), bottom plate (6.6), slider (6.7), gyro wheel (6.8), guide rail (7), support (9), its characterized in that: the hot air pipeline pipe joint is formed by assembling and welding a flange (3), a shell (4), angle steel (5) and a support (6.0) and then assembling a sliding block (6.7) and a roller (6.8); two ends of the angle steel (5) are welded on the flange (3), and the middle of the angle steel is discontinuously welded with the shell (4); the sliding block (6.7) slides on the guide rail (7) of the bracket (9).

2. An air preheater hot air line housing as set forth in claim 1, wherein: the support (6.0) is assembled and welded by a support plate (6.1), a guard plate (6.2), a long vertical plate (6.3), a short vertical plate (6.5) and a bottom plate (6.6), a lifting lug (6.4) is welded on the long vertical plate (6.3), and a sliding block (6.7) and a roller (6.8) are connected on the bottom plate (6.6) by bolts.

3. An air preheater hot air line housing as set forth in claim 1, wherein: the sliding blocks (6.7) and the guide rails (7) adopt a convex-concave inclined plane slideway structure.

4. An air preheater hot air line housing as set forth in claim 1, wherein: the roller (6.8) can rotate.

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