Abrasion-proof cover of coal economizer

Abstract

The utility model discloses a coal economizer anti-abrasion cover which comprises a coal economizer tube bundle and an anti-abrasion cover, the anti-abrasion cover and the coal economizer tube bundle are fixed through a fixing device, the fixing device comprises a drag hook, the drag hook comprises a hook handle, a first drag hook body and a second drag hook body, the hook handle is located between the first drag hook body and the second drag hook body, and the coal economizer tube bundle comprises a plurality of groups of tube bundles. Each group of tube bundles comprises a first tube bundle and a second tube bundle, the first tube bundle and the second tube bundle are arranged in a staggered manner, the first pull hook is embedded with the first tube bundle, and the second pull hook is embedded with the second tube bundle. The device has the advantages that the drag hook and the economizer tube bundle enter the gap between the first tube bundle and the second tube bundle in the same horizontal plane, then the drag hook rotates by 90 degrees to be perpendicular to the tube bundle, the anti-abrasion cover is connected with the economizer tube bundle through the fixing device, the drag hook can be tightly embedded into the tube bundle through the design, and the stability of the anti-abrasion cover is guaranteed; the bending section of the anti-abrasion cover is attached to the bending section of the tube bundle to form a complete protection layer, and abrasion is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an economizer anti-wear cover. Background Art

[0002] During boiler operation, an economizer is usually installed at the smoke outlet at the rear of the boiler to effectively utilize the waste heat from combustion. The economizer utilizes the waste heat from the exhaust flue gas to heat the boiler inlet water, thereby increasing the water temperature, shortening the boiler heating time, and achieving energy savings. However, due to the high flue gas velocity at the economizer location and the poor coal quality, the particles generated during combustion in the fluidized bed furnace are large, resulting in incomplete combustion of solids and a high concentration of impurities and fly ash in the flue gas. When the flue gas flows through the economizer, due to its strong fluidity, large flow area, and large flue gas flow rate, the U-shaped elbow of the economizer is severely worn and easily damaged.

[0003] The anti-wear cover fixing device used in the existing technology has problems such as the hook slipping and serious deformation of the anti-wear cover, which also causes wear of the tube bundle elbow. If additional fixation is performed by welding, the expansion of the anti-wear cover will be affected. Therefore, it is particularly necessary to design a simple and efficient anti-wear device. Utility Model Content

[0004] The purpose of the utility model is to provide an economizer anti-wear cover to solve the above-mentioned technical problems of slippage of the draw hook and serious deformation of the anti-wear cover.

[0005] In order to solve the above technical problems, the utility model provides an economizer anti-wear cover, which includes an economizer tube bundle and an anti-wear cover. The anti-wear cover and the economizer tube bundle are fixed by a fixing device. The fixing device includes a hook. The hook includes a hook handle, a first hook and a second hook. The hook handle is located in the middle of the first hook and the second hook. The economizer tube bundle includes several groups of tube bundles, each group of tube bundles includes a first tube bundle and a second tube bundle, the first tube bundle and the second tube bundle are arranged in an staggered manner, the first hook is engaged with the first tube bundle, and the second hook is engaged with the second tube bundle.

[0006] Furthermore, the tube bundle bending sections on both sides of the economizer tube bundle are respectively fitted with anti-wear covers, the upper and lower ends of the anti-wear cover are bending sections, the bending sections are fitted with the tube bundle bending sections, and the anti-wear cover is located in the middle part as a long straight section.

[0007] Furthermore, the first and second hooks each include a hook door and a hook bottom. The width of the hook door is greater than the outer diameter of the tube bundle, and the hook bottom is tightly against the tube bundle.

[0008] Furthermore, the fixing device also includes a nut and a washer, the end of the hook handle is provided with an external thread, the anti-wear cover is provided with a first through hole corresponding to the hook handle, and the hook handle passes through the first through hole and is connected with the thread.

[0009] Furthermore, a baffle is provided on the tube bundle, the baffle is fixedly connected to the positioning plate, the positioning plate is detachably connected to the tube bundle, and the baffle blocks the flue gas to prevent flue gas impurities from entering the gap between the anti-wear cover and the economizer tube bundle.

[0010] Furthermore, the anti-wear cover has a thickness of 2mm-4mm.

[0011] Furthermore, the adjacent anti-wear covers are arranged in a tile-like overlapping manner, and the width of the overlapping part is 15mm-30mm.

[0012] The beneficial effects of the utility model are as follows: compared with the existing technology, an economizer anti-wear cover aligns the bent section of the anti-wear cover with the bent section of the economizer tube bundle to make them fit; the pull hook and the economizer tube bundle are at the same horizontal plane and enter the gap between the first tube bundle and the second tube bundle, and then the pull hook is rotated 90 degrees to make the pull hook and the tube bundle vertical, and then the hook handle is passed through the first through hole on the anti-wear cover, and then the washer is passed through the hook handle, and the nut is tightened along the external thread on the hook handle until the bottom of the hook is pressed against the tube bundle to complete the installation.

[0013] The wear shield is connected to the economizer tube bundle via a fixture. The hook design allows for a tight fit with the tube bundle, ensuring the shield's stability. The bend of the shield aligns with the bend of the tube bundle, forming a complete protective layer to prevent wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of an economizer anti-wear cover.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure in the MM direction.

[0016] Among them: 1. Fixing device; 11. Washer; 12. Nut; 14. Hook; 141. First hook; 142. Second hook; 143. Hook door; 145. Hook bottom; 146. Hook handle; 2. First tube bundle; 3. Second tube bundle; 4. Anti-wear cover; 41. Long straight section; 42. Bent section; 5. Positioning plate; 6. Baffle; 8. Tube bundle bent section; 9. Economizer tube bundle. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiment described is only one embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In order to make the objectives, technical solutions and advantages of this application clearer, this application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the following description, references to "one embodiment," "an embodiment," "an example," "an example," etc. indicate that the embodiment or example described may include certain features, structures, characteristics, properties, elements, or limitations, but not every embodiment or example necessarily includes the certain features, structures, characteristics, properties, elements, or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.

[0020] In this embodiment: Figure 1 As shown, it includes an economizer tube bundle 9 and an anti-wear cover 4. The anti-wear cover 4 and the economizer tube bundle 9 are fixed by a fixing device 1. The fixing device 1 includes a hook 14. The hook 14 includes a hook handle 146, a first hook 141 and a second hook 142. The hook handle 146 is located in the middle of the first hook 141 and the second hook 142. The economizer tube bundle 9 includes several groups of tube bundles. Each group of tube bundles includes a first tube bundle 2 and a second tube bundle 3. The first tube bundle 2 and the second tube bundle 3 are arranged alternately. The first hook 141 is engaged with the first tube bundle 2, and the second hook 142 is engaged with the second tube bundle 3. The anti-wear cover 4 effectively protects the economizer tube bundle 9, reduces the direct erosion and wear of the tube bundle by particulate matter in the flue gas, and thus extends the service life of the economizer.

[0021] The tube bundle bending sections 8 on both sides of the economizer tube bundle 9 are respectively fitted with the anti-wear cover 4. The upper and lower ends of the anti-wear cover 4 are bending sections 42, and the bending sections 42 are fitted with the tube bundle bending sections 8. The anti-wear cover 4 is located in the middle part as a long straight section 41. The bending sections 42 at the upper and lower ends of the anti-wear cover 4 are tightly fitted with the bending sections 42 on both sides of the economizer tube bundle 9, forming a complete protective layer, which can effectively prevent the invasion of flue gas and particulate matter and enhance the protection effect.

[0022] The first hook 141 and the second hook 142 both include a hook door 143 and a hook bottom 145. The width of the hook door 143 is greater than the outer diameter of the tube bundle, leaving space for thermal expansion of the tube bundle. The hook bottom 145 is tightly pressed against the tube bundle to ensure stability and flexibility in high temperature and high pressure environments.

[0023] The fixing device 1 also includes a nut 12 and a washer 11. The end of the hook handle 146 is provided with an external thread. The anti-wear cover 4 is provided with a first through hole 421 corresponding to the hook handle 146. The hook handle 146 passes through the first through hole 421 and is connected with the thread. The anti-wear cover 4 is firmly connected to the economizer tube bundle 9 through the fixing device 1 to ensure stability in high temperature and high pressure environments without affecting the expansion of the anti-wear cover 4.

[0024] A baffle 6 is provided on the tube bundle, which is fixedly connected to the positioning plate 5. The positioning plate 5 is detachably connected to the tube bundle. The baffle 6 blocks the flue gas to prevent flue gas impurities from entering the gap between the anti-wear cover 4 and the economizer tube bundle 9. The setting of the baffle 6 can effectively block impurities in the flue gas and prevent them from entering the gap between the anti-wear cover 4 and the tube bundle, thereby further protecting the tube bundle.

[0025] The thickness of the anti-wear cover 4 is 2mm-4mm. In actual use, considering the heat exchange efficiency and anti-wear effect, the thickness of the anti-wear cover 4 is 3mm, which is the best thickness.

[0026] The anti-wear cover 4 is made of Q235B, 12Cr13 or 06Cr19Ni10, which has good wear resistance and corrosion resistance. It can effectively resist the erosion of particulate matter and corrosive substances in the flue gas on the tube bundle. Different materials are suitable for different working environments; Q235B is suitable for general environments, while 12Cr13 and 06Cr19Ni10 are suitable for high temperature or highly corrosive environments, providing flexible options to meet different needs.

[0027] Adjacent anti-wear covers 4 are arranged in a tile-like overlapping manner, with the overlapping part width being 15mm-30mm. The tile-like overlapping arrangement not only improves the covering effect of the anti-wear covers 4, but also adapts to the thermal expansion and contraction changes of the tube bundle, avoiding damage caused by thermal stress.

[0028] The anti-wear shield 4 is connected to the economizer tube bundle 9 via the fixture 1. The design of the hook 14 allows it to fit tightly with the tube bundle, ensuring the stability of the anti-wear shield 4. The curved section 42 of the anti-wear shield 4 aligns with the curved section 8 of the tube bundle, forming a complete protective layer to prevent wear. The baffle 6 blocks the flue gas and prevents the ingress of impurities, and its position is ensured by the positioning plate 5.

[0029] Working process: align the bending section 42 of the anti-wear cover 4 with the bending section 8 of the economizer tube bundle 9 to make them fit; insert the hook 14 into the gap between the first tube bundle 2 and the second tube bundle 3 at the same horizontal plane as the economizer tube bundle 9, then rotate the hook 14 90 degrees to make the hook 14 and the tube bundle perpendicular to each other, then pass the hook handle 146 through the first through hole 421 on the anti-wear cover 4, then pass the washer 11 on the hook handle 146, tighten the nut 12 along the external thread on the hook handle 146 until the hook bottom 145 is pressed against the tube bundle to complete the installation.

[0030] Place the positioning plate 5 close to the tube bundle, and the baffle 6 blocks the gap between the edge of the anti-wear cover 4 and the economizer tube bundle 9, and complete the screw connection.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An economizer anti-wear cover, characterized by: It includes an economizer tube bundle and an anti-wear cover, the anti-wear cover and the economizer tube bundle are fixed by a fixing device, the fixing device includes a hook, the hook includes a hook handle, a first hook and a second hook, the hook handle is located between the first hook and the second hook, the economizer tube bundle includes several groups of tube bundles, each group of tube bundles includes a first tube bundle and a second tube bundle, the first tube bundle and the second tube bundle are arranged in an alternating manner, the first hook is engaged with the first tube bundle, and the second hook is engaged with the second tube bundle.

2. The economizer anti-wear cover according to claim 1, characterized in that: The bent sections of the tube bundles on both sides of the economizer tube bundle are respectively fitted with anti-wear covers. The upper and lower ends of the anti-wear cover are bent sections, which are fitted with the bent sections of the tube bundle. The middle part of the anti-wear cover is a long straight section.

3. The economizer anti-wear cover according to claim 1, characterized in that: The first and second hooks each include a hook door and a hook bottom. The width of the hook door is greater than the outer diameter of the tube bundle, and the hook bottom is tightly pressed against the tube bundle.

4. The economizer anti-wear cover according to claim 1, characterized in that: The fixing device further comprises a nut and a washer. The end of the hook handle is provided with an external thread. The anti-wear cover is provided with a first through hole corresponding to the hook handle. The hook handle passes through the first through hole and is connected with the thread.

5. The economizer anti-wear cover according to claim 1, characterized in that: The tube bundle is provided with a baffle, which is fixedly connected to the positioning plate and detachably connected to the tube bundle. The baffle blocks the flue gas to prevent flue gas impurities from entering the gap between the anti-wear cover and the economizer tube bundle.

6. The economizer anti-wear cover according to claim 1, characterized in that: The thickness of the anti-wear cover is 2mm-4mm.

7. The economizer anti-wear cover according to claim 1, characterized in that: The adjacent anti-wear covers are arranged in a tile-like overlapping manner, and the width of the overlapping part is 15mm-30mm.

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