Water cooling wall protection structure of boiler and boiler

Abstract

The water-cooled wall protection structure comprises a main body and a drainage part, a through hole is formed in the main body, the main body is suitable for being installed on the outer side face of a water-cooled wall, the through hole is used for allowing a soot blower of the boiler to pass through, and the drainage part is arranged on the side, facing the outer side face of the water-cooled wall, of the main body. The end, away from the main body, of the drainage part is suitable for being arranged in a bent pipe hole located in the water cooling wall and used for installing the soot blower. The drain portion surrounding the elbow hole is arranged at the elbow hole where the soot blower is installed, condensate water can directly drop on the drain portion, the sealing fins are prevented from cracking due to uneven heat and cold, and the service life of the water cooling wall is prolonged. The water draining part is arranged between the main body and the outer side face of the water cooling wall, so that steam of the soot blower can be prevented from passing through a gap between the main body and the outer side face of the water cooling wall, and the outer side face of the water cooling wall is further protected from being thinned due to steam blowing damage.

Description

Technical Field

[0001] The present disclosure relates to the technical field of boilers, and in particular to a water-cooled wall protection structure of a boiler and a boiler. Background Art

[0002] The water-cooled wall of a boiler is usually an evaporative heating surface composed of many parallel pipes laid on the inner wall of the boiler furnace. The function of the water-cooled wall is to absorb the radiation heat of the high-temperature flame or flue gas in the furnace, generate steam or hot water in the pipe, and reduce the temperature of the furnace wall to protect the furnace wall.

[0003] In order to prevent the heated area from being sooted, a steam soot blower is required to be used to blow soot regularly. During the operation of the steam soot blower, the soot blowing gun barrel extends from the elbow hole on the water-cooled wall, and at the same time, the rotating steam jet removes the soot accumulated on the water-cooled wall. However, due to the structural design of the steam soot blower, there is an internal leakage in the steam inlet lift valve, which causes the soot blowing steam to leak into the inner tube of the soot blower gun barrel, thereby condensing the steam into water. During the operation of the soot blower, the condensed water will drip onto the sealing fins at the bottom of the elbow hole, causing uneven heating and cooling of the sealing fins, resulting in cracking of the sealing fins, and ultimately causing boiler leakage, threatening the safety of boiler operation. Utility Model Content

[0004] The purpose of the present disclosure is to provide a water-cooled wall protection structure of a boiler and a boiler to solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, as a first aspect of the present disclosure, the present disclosure provides a water-cooled wall protection structure of a boiler, comprising a main body and a drain portion, wherein a through hole is formed on the main body, the main body is suitable for being installed on the outer side surface of the water-cooled wall, the through hole is used for allowing a soot blower of the boiler to pass through, the drain portion is arranged on a side of the main body facing the outer side surface, and the drain portion is arranged around the through hole, and an end of the drain portion away from the main body is suitable for being arranged in a bent pipe hole located on the water-cooled wall for installing the soot blower.

[0006] Optionally, the hydrophobic portion is configured as a first annular plate, and in the radial direction of the through hole, an inner wall of the first annular plate is flush with an inner wall of the through hole.

[0007] Optionally, the hydrophobic portion is configured as a second annular plate, the first end and the second end of the second annular plate in the axial direction are respectively located on the circumference of the first circle and the circumference of the second circle, the first end is farther away from the main body than the second end, wherein the diameter of the first circle is smaller than the diameter of the second circle.

[0008] Optionally, the main body includes a connected protective part and a connecting part, an end of the connecting part away from the protective part is used to connect with the outer side surface of the water-cooled wall, the protective part is used to cover the water-cooled wall tube arranged around the bent pipe hole, and the through hole is formed on the protective part.

[0009] Optionally, the connecting portion includes a connecting plate and a connecting block, one end of the connecting plate is connected to the protective portion, the other end of the connecting plate is connected to the connecting block, and a side of the connecting block away from the connecting plate is used to connect to the outer side surface.

[0010] Optionally, the connecting block is used to be connected to the water-cooled wall by welding.

[0011] Optionally, there are two connecting parts, and the two connecting parts are respectively arranged at two ends of the protective part along the vertical direction.

[0012] Optionally, the water-cooled wall protection structure is made of austenitic chromium-nickel stainless steel.

[0013] As a second aspect of the present disclosure, the present disclosure provides a boiler, comprising a water-cooled wall, a soot blower and the above-mentioned water-cooled wall protection structure, wherein a pipe bend hole for installing the soot blower is formed on the water-cooled wall, and the main body is arranged around the pipe bend hole;

[0014] One end of the hydrophobic portion away from the main body is used to be arranged in the elbow hole.

[0015] Optionally, the water-cooled wall includes a plurality of water-cooled wall tubes and sealing fins, the sealing fins are respectively connected to adjacent water-cooled wall tubes, the bent tube holes are opened on the sealing fins between adjacent water-cooled wall tubes, and the main body covers the water-cooled wall tubes.

[0016] Through the above technical scheme, a drain portion surrounding the bent pipe hole is provided at the bent pipe hole where the soot blower is installed, so that the condensed water in the soot blower can directly drip on the drain portion and flow out along the main body of the protective structure, thereby avoiding the condensed water from contacting the sealing fins at the lower part of the bent pipe hole, preventing the sealing fins from cracking due to uneven heating and cooling, thereby improving the service life of the water-cooled wall and ensuring the normal operation of the boiler.

[0017] In addition, the drain portion provided between the main body and the outer side surface of the water-cooled wall can also prevent the steam of the soot blower from passing through the gap between the main body and the outer side surface of the water-cooled wall, further protecting the outer side surface of the water-cooled wall from being thinned due to steam blowing loss, thereby increasing the service life of the boiler.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0020] Figure 1 is a three-dimensional schematic diagram of a water-cooled wall protection structure provided by an embodiment of the present disclosure;

[0021] Figure 2 is a front view schematic diagram of a water-cooled wall protection structure provided by an embodiment of the present disclosure;

[0022] Figure 3 is a cross-sectional schematic diagram of a water-cooled wall protection structure provided by an embodiment of the present disclosure;

[0023] Figure 4 is a cross-sectional schematic diagram of a water-cooled wall protection structure provided by another embodiment of the present disclosure;

[0024] Figure 5 It is a partial front view schematic diagram of a water-cooled wall provided in one embodiment of the present disclosure.

[0025] Description of Reference Numerals

[0026] 100-water-cooled wall protection structure; 10-water-cooled wall; 101-water-cooled wall tube; 102-bend hole; 103-sealing fin; 20-soot blower; 1-main body; 11-through hole; 12-protective part; 13-connecting part; 131-connecting plate; 132-connecting block; 2-draining part; 21-first annular plate; 22-second annular plate; 221-first end; 222-second end. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise stated, the directional words used, such as "upper" and "lower", are usually defined based on the state when the water-cooled wall protection structure is installed on the water-cooled wall. This is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. "Inside" and "outside" refer to the inside and outside of the contour of the corresponding component. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0030] As a first aspect of the present disclosure, Figures 1 to 4 As shown, the present disclosure provides a water-cooled wall protection structure 100 of a boiler, comprising a main body 1 and a drain portion 2, a through hole 11 being formed on the main body 1, the main body 1 being suitable for being installed on the outer side of the water-cooled wall 10, the through hole 11 being used for allowing a soot blower 20 of the boiler to pass through, the drain portion 2 being arranged on one side of the outer side of the main body 1 facing the water-cooled wall 10, and the drain portion 2 being arranged around the through hole 11, and an end of the drain portion 2 away from the main body 1 being suitable for being arranged in a curved pipe hole 102 located on the water-cooled wall 10 for installing the soot blower 20.

[0031] Through the above technical scheme, a hydrophobic portion 2 surrounding the elbow hole 102 is provided at the elbow hole 102 where the soot blower 20 is installed, so that the condensed water in the soot blower 20 can directly drip onto the hydrophobic portion 2 and flow out along the main body 1 of the water-cooled wall protection structure 100, thereby avoiding the condensed water from contacting the sealing fins 103 at the lower part of the elbow hole 102, preventing the sealing fins 103 from cracking due to uneven heating and cooling, thereby improving the service life of the water-cooled wall 10 and ensuring the normal operation of the boiler.

[0032] In addition, the drain portion 2 is arranged between the main body 1 and the outer side surface of the water-cooled wall 10, which can also prevent the steam of the soot blower 20 from passing through the gap between the main body 1 and the outer side surface of the water-cooled wall 10, further protecting the outer side surface of the water-cooled wall 10 from being thinned due to steam blowing, thereby improving the service life of the boiler.

[0033] To further guide the condensed water, optionally, as Figure 3 As shown, the hydrophobic portion 2 is constructed as a first annular plate 21, and in the radial direction of the through hole 11, the inner wall of the first annular plate 21 is flush with the inner wall of the through hole 11. In other words, the aperture of the inner hole defined by the first annular plate 21 is equal to the aperture of the through hole 11. After the condensed water from the soot blower 20 falls on the inner wall of the first annular plate 21, it will flow along the main body 1 connected to the hydrophobic portion 2 in a direction away from the hydrophobic portion 2. By constructing the inner wall of the first annular plate 21 to be flush with the inner wall of the through hole 11, it is possible to prevent the condensed water from accumulating in the gap between the hydrophobic portion 2 and the main body 1, and to avoid the water-cooled wall protection structure 100 from metal fatigue damage similar to that of the water-cooled wall 10.

[0034] In another embodiment provided by the present disclosure, Figure 4As shown, the hydrophobic portion 2 is constructed as a second annular plate 22, and the first end 221 and the second end 222 of the second annular plate 22 along the axial direction are respectively located on the circumference of the first circle and the circumference of the second circle, and the first end 221 is farther away from the main body 1 than the second end 222, wherein the diameter of the first circle is smaller than the diameter of the second circle.

[0035] The diameters of the circles enclosed by the first end 221 and the second end 222 of the second annular plate 22 are different, and the diameter of the first circle is smaller than the diameter of the second circle. In this way, the second annular plate 22 can have an inclined surface inclined from the first end 221 toward the second end 222. The condensed water falling on this inclined surface can flow in a direction away from the elbow hole 102 under the guidance of the inclined surface, thereby preventing the condensed water from flowing back into the elbow hole 102, or flowing to the sealing fins 103 of the water-cooled wall 10 through the gap between the hydrophobic portion 2 and the outer side surface of the water-cooled wall 10, further reducing the probability of the condensed water contacting the water-cooled wall 10 and extending the service life of the water-cooled wall 10.

[0036] Alternatively, if Figure 1 , Figure 2 and Figure 3 As shown, the main body 1 includes a connected protective portion 12 and a connecting portion 13, the end of the connecting portion 13 away from the protective portion 12 is used to connect with the outer side of the water-cooled wall 10, the protective portion 12 is used to cover the water-cooled wall tube 101 arranged around the elbow hole 102, and a through hole 11 is formed on the protective portion 12. Since the water-cooled wall protection structure 100 is used to be arranged around the elbow hole 102 where the soot blower 20 is installed, when the soot blower 20 is working, the steam first contacts the outer side of the water-cooled wall 10 around the elbow hole 102, so the water-cooled wall 10 around the elbow hole 102 is seriously damaged. While the sealing fins 103 of the water-cooled wall 10 are protected by the hydrophobic portion 2, the protective portion 12 of the main body 1 can also cover the water-cooled wall tube 101 arranged around the elbow hole 102, so that the steam of the soot blower 20 will not damage the water-cooled wall tube 101 during the soot blowing process, further extending the service life of the water-cooled wall tube 101.

[0037] In order to connect the main body 1 to the outer side of the water-cooled wall 10, optionally, as Figure 1 and Figure 3As shown, the connection part 13 includes a connection plate 131 and a connection block 132, one end of the connection plate 131 is connected to the protection part 12, the other end of the connection plate 131 is connected to the connection block 132, and the side of the connection block 132 away from the connection plate 131 is used to connect with the outer side surface. Since the hydrophobic part 2 is arranged between the main body 1 and the outer side surface of the water-cooled wall 10, there is a gap between the main body 1 and the outer side surface of the water-cooled wall 10. By connecting with the connection block 132, on the one hand, the gap between the main body 1 and the outer side surface of the water-cooled wall 10 can be filled, and the main body 1 and the outer side surface of the water-cooled wall 10 can be connected; on the other hand, the point connection method such as the connection block 132 is used to connect the main body 1 and the water-cooled wall 10, which can reduce the installation difficulty of the water-cooled wall protection structure 100 and reduce the installation cost.

[0038] The present disclosure does not limit the connection method between the connection block 132 and the water-cooled wall 10. In one embodiment provided in the present disclosure, the connection block 132 is used for welding connection with the water-cooled wall 10. The welding connection can ensure the connection strength between the main body 1 and the water-cooled wall 10, and improve the life and protection effect of the water-cooled wall protection structure 100.

[0039] Alternatively, if Figure 1 and Figure 3 As shown, there are two connecting parts 13, and the two connecting parts 13 are respectively arranged at both ends of the protection part 12 in the vertical direction. The two connecting parts 13 can respectively connect the protection part 12 with the water-cooled wall 10 at both ends of the protection part 12, thereby increasing the connection points between the main body 1 and the water-cooled wall 10 and further improving the strength of the connection.

[0040] The present disclosure does not limit the material of the water-cooled wall protection structure 100. In one embodiment provided in the present disclosure, the water-cooled wall protection structure 100 is made of austenitic chromium-nickel stainless steel. Since the water-cooled wall protection structure 100 is in an environment of high temperature, high humidity and steam blowing for a long time, austenitic chromium-nickel stainless steel has the advantages of high strength, good heat resistance, good impact toughness, etc., and also has good overall tensile stress resistance and corrosion resistance. The water-cooled wall 10 can be protected from damage for a long time in the above environment.

[0041] As a second aspect of the present disclosure, the present disclosure also provides a boiler, such as Figure 5 As shown, the boiler comprises a water wall 10, a soot blower 20 and the above-mentioned water wall protection structure 100. The water wall 10 is formed with an elbow hole 102 for installing the soot blower 20, and the main body 1 is arranged around the elbow hole 102. The end of the drain portion 2 away from the main body 1 is used to be arranged in the elbow hole 102.

[0042] Optionally, the hydrophobic portion 2 may also be welded to the inner wall of the elbow hole 102 , thereby further improving the connection strength between the water-cooled wall protection structure 100 and the water-cooled wall 10 and reducing the probability of the protection structure detaching from the water-cooled wall 10 .

[0043] Alternatively, if Figure 5 As shown, the water wall 10 includes a plurality of water wall tubes 101 and sealing fins 103, the sealing fins 103 are respectively connected to adjacent water wall tubes 101, the elbow holes 102 are provided on the sealing fins 103 between adjacent water wall tubes 101, and the main body 1 covers the water wall tubes 101. In order to avoid the elbow holes 102, the water wall tubes 101 have an elbow section, and the elbow section is arranged around the elbow hole 102. The main body 1 covers the elbow section of the water wall tube 101, which can ensure that the steam of the soot blower 20 will not damage the water wall tube 101 during the soot blowing process, and further extend the service life of the elbow section of the water wall tube 101.

[0044] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0046] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A water-cooled wall protection structure for a boiler, characterized in that: The utility model comprises a main body and a drain portion, wherein a through hole is formed on the main body, the main body is suitable for being installed on the outer side surface of the water-cooled wall, the through hole is used for a soot blower of a boiler to pass through, the drain portion is arranged on a side of the main body facing the outer side surface, and the drain portion is arranged around the through hole, and an end of the drain portion away from the main body is suitable for being arranged in a curved pipe hole located on the water-cooled wall for installing the soot blower.

2. The water-cooled wall protection structure according to claim 1, characterized in that: The hydrophobic portion is configured as a first annular plate, and in a radial direction of the through hole, an inner wall of the first annular plate is flush with an inner wall of the through hole.

3. The water-cooled wall protection structure according to claim 1, characterized in that: The hydrophobic portion is configured as a second annular plate, wherein the first end and the second end of the second annular plate in the axial direction are respectively located on the circumference of the first circle and the circumference of the second circle, and the first end is farther away from the main body than the second end, wherein the diameter of the first circle is smaller than the diameter of the second circle.

4. The water-cooled wall protection structure according to any one of claims 1 to 3, characterized in that: The main body includes a connected protective part and a connecting part, wherein one end of the connecting part away from the protective part is used to connect with the outer side surface of the water-cooled wall, the protective part is used to cover the water-cooled wall tubes arranged around the bent pipe hole, and the through hole is formed on the protective part.

5. The water-cooled wall protection structure according to claim 4, characterized in that: The connecting part includes a connecting plate and a connecting block, one end of the connecting plate is connected to the protective part, the other end of the connecting plate is connected to the connecting block, and a side of the connecting block away from the connecting plate is used to connect to the outer side surface.

6. The water-cooled wall protection structure according to claim 5, characterized in that: The connecting block is used for welding connection with the water-cooled wall.

7. The water-cooled wall protection structure according to claim 4, characterized in that: There are two connecting parts, and the two connecting parts are respectively arranged at two ends of the protection part along the vertical direction.

8. The water-cooled wall protection structure according to any one of claims 1 to 3, characterized in that: The water-cooled wall protection structure is made of austenitic chromium-nickel stainless steel.

9. A boiler, characterized in that: The water-cooled wall comprises a water-cooled wall, a soot blower and a water-cooled wall protection structure as claimed in any one of claims 1 to 8, wherein a pipe bend hole for installing the soot blower is formed on the water-cooled wall, and the main body is arranged around the pipe bend hole; One end of the hydrophobic portion away from the main body is used to be arranged in the elbow hole.

10. The boiler according to claim 9, characterized in that The water-cooled wall comprises a plurality of water-cooled wall tubes and sealing fins, the sealing fins are respectively connected to adjacent water-cooled wall tubes, the bent tube holes are arranged on the sealing fins between adjacent water-cooled wall tubes, and the main body covers the water-cooled wall tubes.

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