A hanging anti-abrasion device for the heating surface of a waste heat boiler

Abstract

A hanging anti-wear device for the heating surface of a waste heat boiler, comprising an air inlet hopper. At least six flow guiding plates are fixedly arranged between two opposite side walls inside the air inlet hopper; three flow guiding plates are arranged on each side of the central line of the air inlet hopper, and each flow guiding plate inclines towards the central line of the air inlet hopper. There are two upper and lower layers of anti-wear strips with a V-shaped cross-section arranged on the lower side of the flow guiding plates; suspension rods are fixedly connected between each anti-wear strip and each flow guiding plate; the suspension rods are divided into long suspension rods and short suspension rods. The long suspension rods are connected to the anti-wear strips located in the lower layer, and the short suspension rods are connected to the anti-wear strips located in the upper layer. The present invention aims to provide an anti-wear device that can eliminate the defects existing in traditional flow guiding and anti-wear methods, and can long-term play the anti-wear effect on the heating surface under the condition of no maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-abrasion of waste heat boilers, and particularly relates to an anti-abrasion device for hanging the heating surface of a waste heat boiler. Background Art

[0002] At present, there are mainly two problems in the practical application of industrial waste heat boilers for treating hot flue gas containing hard ash particles: 1. The hot air distribution in the boiler cross-section is uneven; 2. The windward heating surface at the boiler inlet is worn. Although the existing inlet guide vanes of waste heat boilers have a certain guiding effect, since the starting points of the guide vanes are on the same horizontal line, the guiding effect is not good, and the uniform distribution of hot air is not achieved. After the hot air entrained with hard ash powder particles is guided by the guide vanes, a large amount of ash powder is concentrated at the place where the guide vanes are disengaged, which will cause serious erosion of the local heating surface. It poses a serious hidden danger to the safe operation of the boiler. Due to the above various deficiencies, the existing guiding and anti-abrasion methods are difficult to meet the needs of the long-term stable operation of the boiler. There is an urgent need for an anti-abrasion device that can eliminate the defects of traditional guiding and anti-abrasion methods and can play a long-term anti-abrasion effect on the heating surface in a maintenance-free state. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above deficiencies in the prior art, and aims to provide an anti-abrasion device that can eliminate the defects of traditional guiding and anti-abrasion methods and can play a long-term anti-abrasion effect on the heating surface in a maintenance-free state.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] An anti-abrasion device for hanging the heating surface of a waste heat boiler includes an air inlet hopper. At least six guide vanes are fixedly arranged between two opposite side walls in the air inlet hopper; three guide vanes are arranged on each side of the center line of the air inlet hopper, and each guide vane is inclined towards the center line of the air inlet hopper. There are two layers of anti-abrasion strips with a V-shaped cross-section arranged below the guide vanes. The vertical height of the guide vanes decreases from the middle to both sides, and the vertical height difference between adjacent guide vanes is 20 cm - 40 cm; there are suspension rods fixedly connected between each anti-abrasion strip and each guide vane; the suspension rods are divided into long suspension rods and short suspension rods. The long suspension rods are connected to the anti-abrasion strips located in the lower layer, and the short suspension rods are connected to the anti-abrasion strips located in the upper layer. The length of the short suspension rods in the suspension rods is 20 mm, and the length of the long suspension rods is 40 mm.

[0006] Further, the side edges of the anti-abrasion strips overlap with the side edges of adjacent anti-abrasion strips by 1 - 3 cm, and the distance between adjacent anti-abrasion strips is 10 - 20 cm.

[0007] Further, the angle between the side edge of the anti-abrasion strip and the horizontal plane is 30° - 45°.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The structure of the present invention is simple and reasonable. The anti-wear strips are effectively fixed on the air inlet hopper of the waste heat boiler, so that the anti-wear strips can block the heating surface on the lower side of the air inlet hopper, and at the same time, the falling and deformation of the anti-wear strips are avoided, achieving the purpose of long-term use of the anti-wear device without maintenance. The inclined deflector can evenly distribute the hot air to the boiler heating surface and improve the boiler efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present invention;

[0011] Figure 2 is Figure 1 a side view structural diagram of

[0012] Figure 3 is a schematic structural diagram of the anti-wear strip in the present invention;

[0013] Figure 4 is a usage state diagram of the present invention.

[0014] Description of the reference numerals:

[0015] 1 - deflector, 2 - anti-wear strip, 3 - suspension rod, 4 - air inlet hopper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present invention will be described in detail below with reference to the drawings and embodiments.

[0017] As Figures 1 to 3 shown, an anti-wear device for hanging the heating surface of a waste heat boiler includes an air inlet hopper 4. At least six deflectors 1 are fixedly arranged between two opposite side walls in the air inlet hopper 4; three deflectors 1 are arranged on each side of the center line of the air inlet hopper 4, and each deflector 1 is inclined towards the center line of the air inlet hopper 4. The lower side of the deflector 1 is provided with two layers of anti-wear strips 2 with a V-shaped cross section; a suspension rod 3 is fixedly connected between each deflector 1 and each anti-wear strip 2; the suspension rod 3 is divided into a long suspension rod and a short suspension rod. The long suspension rod is connected to the anti-wear strip 2 located in the lower layer, and the short suspension rod is connected to the anti-wear strip 2 located in the upper layer; the length of the short suspension rod in the suspension rod 3 is 20 mm, and the length of the long suspension rod is 40 mm.

[0018] As Figure 4As shown in the figure, in the present invention, the deflector 1 is installed in the air inlet hopper 4 of the waste heat boiler. The anti-abrasion strip 2 on the lower side of the deflector 1 is located at the upper part of the windward heating surface of the waste heat boiler. The hard ash particles carried by the hot flue gas will accumulate in the continuous anti-abrasion strip 2. The V-shaped cross-section of the anti-abrasion strip 2 enables the hard ash particles not to directly scour the body of the anti-abrasion strip 2, but to contact the ash accumulated in the groove. Each anti-abrasion strip 2 is fixedly connected to each deflector 1 through a suspension rod 3, making the position of the anti-abrasion strip 2 more stable, achieving the purpose of long-term use of the anti-abrasion device without maintenance. Moreover, the deflectors 1 arranged obliquely on both sides in the air inlet hopper 4 evenly distribute the hot air to the boiler heating surface, improving the boiler efficiency.

[0019] Among them, the vertical height of the deflector 1 decreases from the middle to both sides. The vertical height difference between adjacent deflectors 1 is 20 cm - 40 cm. The hot flue gas entering the air inlet hopper 4 can first be dispersed by the two highest deflectors 1 in the middle, and then gradually be dispersed by the deflectors 1 with lower vertical height, further evenly distributing the hot air to the boiler heating surface.

[0020] Among them, the side edges of the anti-abrasion strip 2 all overlap with the side edges of the adjacent anti-abrasion parts 2 by 1 - 3 cm, and the distance between adjacent anti-abrasion strips 2 is 10 - 20 cm; the included angle between the side edge of the anti-abrasion strip 2 and the horizontal plane is 30° - 45°. The anti-abrasion strip 2 with overlapping parts in the vertical direction on the side edge can make there be no air passing gap between adjacent anti-abrasion strips 2, enabling the hard ash particles in the hot flue gas in the air inlet hopper 4 to be completely caught by the anti-abrasion strip 2.

[0021] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hanging anti-wear device for the heating surface of a waste heat boiler, including an air inlet hopper, characterized in that: At least six flow guiding plates are fixedly arranged between two opposite side walls in the air inlet hopper; three flow guiding plates are arranged on each side of the center line of the air inlet hopper, and each flow guiding plate is inclined towards the center line of the air inlet hopper. Two layers of wear-resistant strips with a V-shaped cross-section are arranged on the lower side of the flow guiding plate. The vertical height of the flow guiding plate decreases from the middle to both sides, and the vertical height difference between adjacent flow guiding plates is 20 cm - 40 cm; suspension rods are fixedly connected between the wear-resistant strips and each flow guiding plate; the suspension rods are divided into long suspension rods and short suspension rods. The long suspension rods are connected to the wear-resistant strips located in the lower layer, and the short suspension rods are connected to the wear-resistant strips located in the upper layer. The length of the short suspension rods in the suspension rods is 20 mm, and the length of the long suspension rods is 40 mm.

2. The hanging anti-wear device for the heating surface of the waste heat boiler according to claim 1, wherein: The side edges of the wear-resistant strips overlap with the side edges of adjacent wear-resistant strips by 1 - 3 cm, and the distance between adjacent wear-resistant strips is 10 - 20 cm.

3. The hanging anti-abrasion device for the heating surface of the waste heat boiler according to claim 2, characterized in that: The included angle between the side edge of the wear-resistant strip and the horizontal plane is 30° - 45°.

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