Waste heat boiler manhole door opening cooling pipe arrangement structure

Abstract

The utility model discloses a waste heat boiler manhole door opening cooling pipe arrangement structure and relates to the technical field of waste heat boilers, a left cooling pipe and a right cooling pipe are close and parallel to each other and extend to the middle of the upper edge of a manhole door opening from top to bottom to be vertically bent, the left cooling pipe extends towards the left edge side of the manhole door opening, and the right cooling pipe extends towards the right edge side of the manhole door opening. The left cooling pipe and the right cooling pipe extend to the lower edge of the manhole door opening and obliquely extend to the lower portion of the middle of the lower edge of the manhole door opening. The damage rate of the cooling pipe can be reduced, and safe operation of the waste heat boiler is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat boiler technical field, concretely is a waste heat boiler manhole door hole cooling pipe arrangement structure. BACKGROUND

[0002] The waste heat boiler is a large water circulation equipment which produces steam and hot water by using high-temperature dust-containing flue gas as heat source, and the radiation part of the waste heat boiler receives high-temperature flue gas and high-temperature dust generated in the production of the flash furnace, so that the tube spacing is very small when designing the water wall of the radiation part of the waste heat boiler, and the tube spacing is 56mm; the left and right sides of the waste heat boiler are designed with many 500*500mm manhole doors, which facilitates regular inspection of the internal condition and slagging condition of the water wall and timely treatment of problems.

[0003] As shown in Figure 1 , 2 The arrangement scheme of the cooling water pipe at the manhole door hole A of the existing waste heat boiler is as follows: the cooling water pipes 1, 1' adjacent to the manhole door hole A are arranged symmetrically around the manhole door hole A, the cooling water pipes 1, 1' extend to the middle of the upper edge A1 of the manhole door hole from top to bottom, and then extend to the left and right edges A2, A3 of the manhole door hole from the left and right sides of the upper edge A1 of the manhole door hole, and then extend to the middle of the lower edge A4 of the manhole door hole from the left and right edges A2, A3 of the manhole door hole, and then extend downward from the middle of the lower edge A4 of the manhole door hole; the cooling water pipes arranged outside the cooling water pipes 1, 1' are arranged in turn from inside to outside. The cooling water pipes 1, 1' in the above scheme need to be bent at right angles at the four corners of the manhole door hole A and the middle of the upper edge A1 and the lower edge A4 of the manhole door hole, which results in the need for four right-angle bends of each cooling water pipe, and the bending stress is concentrated in many places, causing processing stress of the cooling water pipe; at the same time, the area of the manhole door hole A is a low-temperature area, which is easy to absorb cold air, not only exists low-temperature corrosion phenomenon, but also is a concentrated area of thermal stress, so the cooling water pipes 1, 1' adjacent to the manhole door hole A are damaged due to the combined action of stress and thermal stress caused by bending processing, resulting in a high failure rate of water leakage, which not only affects the safe operation of the waste heat boiler, but also affects the stable production of the flash furnace. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a furnace tube arrangement structure of a waste heat boiler manhole door hole, which can reduce the damage rate of the cooling pipe and ensure the safe operation of the waste heat boiler.

[0005] This utility model can be achieved through the following technical solution: the left and right cooling pipes extend from top to bottom in parallel to the middle of the upper edge of the manhole doorway and bend vertically; the left cooling pipe extends to the left edge of the manhole doorway and the right cooling pipe extends to the right edge of the manhole doorway; the left and right cooling pipes extend to the lower edge of the manhole doorway and extend obliquely downward to the middle of the lower edge of the manhole doorway.

[0006] Compared with the prior art, the solution of this application can reduce the number of stress concentration points during bending and reduce the stress caused by bending. This reduces stress concentration and stress damage caused by a large number of bends, making it less likely for the left and right cooling pipes to break and leak, thus ensuring the safe operation of the waste heat boiler. Attached Figure Description

[0007] Figure 1 , 2 The cooling pipe arrangement structure of the manhole opening in the waste heat boiler in the existing technology;

[0008] Figure 3 This utility model describes the cooling pipe arrangement structure of the manhole opening for the waste heat boiler.

[0009] Figure 4 for Figure 3 Sectional view at point BB;

[0010] Figure 5 , 6 These are schematic diagrams of the left and right cooling pipes in this utility model. Detailed Implementation

[0011] Please see Figures 3-6 As shown, a furnace tube arrangement structure for a waste heat boiler manhole is described. The left cooling pipe 10a and right cooling pipe 10b extend adjacently and parallel from top to bottom to the middle of the upper edge A1 of the manhole, where they bend vertically. The left cooling pipe 10a extends towards the left edge A2 of the manhole, and the right cooling pipe 10b extends towards the right edge A3 of the manhole. Both the left and right cooling pipes extend to the lower edge A4 of the manhole and then obliquely downwards towards the middle of the lower edge A4. The vertical bends of the left and right cooling pipes 10a and 10b are reduced to two locations, and the left... The bending angle of cooling pipe 10a and right cooling pipe 10b at the lower edge A4 of the manhole is an acute angle. Compared with the existing technology that performs four right-angle bends on the cooling pipe, this solution can reduce the number of stress concentration points during bending and reduce the stress caused by bending. This reduces stress concentration and stress damage caused by a large number of bends, making the left cooling pipe 10a and right cooling pipe 10b less prone to damage and leakage. The service life of the left cooling pipe 10a and right cooling pipe 10b is increased, while ensuring the safe operation of the waste heat boiler.

[0012] The left cooling pipe 10a and the right cooling pipe 10b are different in the length of extension along the upper edge A1 of the manhole; this mainly depends on the position of the manhole A on the water-cooled wall and the arrangement of the cooling pipes on the water-cooled wall, that is, the U-shaped cooling pipes 20 arranged in turn at the left side of the left cooling pipe 10a or the right side of the right cooling pipe 10b at the upper edge A1 of the manhole also need to be uniformly arranged, which limits the length of extension of the left cooling pipe 10a and the right cooling pipe 10b along the upper edge A1 of the manhole.

[0013] The left cooling pipe 10a and the right cooling pipe 10b extend to the lower edge A4 of the manhole, extend obliquely below the middle of the lower edge A4 of the manhole, and then extend vertically downward. The area below the lower edge A4 of the manhole and between the left cooling pipe 10a and the right cooling pipe 10b is arranged with inverted U-shaped cooling pipes 20. By slightly bending the pipe section of the left cooling pipe 10a and the right cooling pipe 10b below the lower edge A4 of the manhole, the area below the lower edge A4 of the manhole can be used to uniformly arrange the inverted U-shaped cooling pipes 20. Cooling water flows into one end of the U-shaped cooling pipe 20 and flows out from the other end. The inverted U-shaped cooling pipe 20 is used to cool the water-cooled wall below the lower edge A4 of the manhole. Overall, it reduces the cooling dead angle of the water-cooled wall below the lower edge A4 of the manhole caused by the oblique extension of the left cooling pipe 10a and the right cooling pipe 10b, thereby ensuring the cooling effect of the water-cooled wall. The length of the oblique extension of the left cooling pipe 10a and the right cooling pipe 10b at the lower edge A4 of the manhole is also related to the uniform arrangement of the U-shaped cooling pipes 20. It is necessary to ensure that all U-shaped cooling pipes 20 below the lower edge A4 of the manhole are uniformly arranged. Preferably, the left cooling pipe 10a and the right cooling pipe 10b are equally spaced between the vertical section below the lower edge A4 of the manhole and all U-shaped cooling pipes 20.

[0014] The horizontal pipe section of the left cooling pipe 10a and the right cooling pipe 10b is vertically arranged with U-shaped cooling pipes 20 above. The U-shaped cooling pipes 20 here are used to cool the water-cooled wall above the upper edge A1 of the manhole.

[0015] The left side of the left cooling pipe 10a at the left edge A2 of the manhole is arranged with a straight pipe-shaped cooling pipe 30 adjacent to it. The right side of the right cooling pipe 10b at the right edge A3 of the manhole is arranged with a straight pipe-shaped cooling pipe 30 adjacent to it. The left cooling pipe 10a, the right cooling pipe 10b, and the U-shaped cooling pipe 20 are all located in the area between the two straight pipe-shaped cooling pipes 30. The straight pipe-shaped cooling pipe 30 extends from the top of the water-cooled wall to the bottom of the water-cooled wall, which realizes the cooling of the left cooling pipe 10a, the right cooling pipe 10b, and the surrounding area, and guarantees the cooling effect of the area near the manhole A. Moreover, since the straight pipe-shaped cooling pipe 30 does not bend, there is no processing stress caused by bending, and the straight pipe-shaped cooling pipe 30 is not easy to damage.

[0016] The surfaces of the left cooling pipe 10a and the right cooling pipe 10b are provided with an anticorrosion layer; specifically, the surfaces of the left cooling pipe 10a and the right cooling pipe 10b are subjected to 360° overlay welding treatment to form a coating layer with anticorrosion effect, thereby reducing the risk of water leakage of the left cooling pipe 10a and the right cooling pipe 10b; the anticorrosion layer can be stainless steel, nickel-based alloy (such as nickel-chromium alloy), cobalt-based alloy, etc.

[0017] The left cooling pipe 10a, the right cooling pipe 10b, the U-shaped cooling pipe 20 and the straight pipe-shaped cooling pipe 30 are all located in the same plane; such arrangement makes the arrangement of the cooling pipes at the manhole door hole A in a planar shape, avoiding the problem of the increase of the weight of the manhole door due to the stacking of the cooling pipes along the axial direction of the manhole door in the prior art, and further causing the cooling pipes at the manhole door hole A to be subjected to a larger shearing force.

Claims

1. A waste heat boiler manhole opening cooling tube arrangement, characterized by: The left cooling pipe (10a) and the right cooling pipe (10b) are vertically bent in the middle part of the upper edge (A1) of the manhole door, extend to the left edge (A2) of the manhole door from the left cooling pipe (10a), extend to the right edge (A3) of the manhole door from the right cooling pipe (10b), and extend to the lower edge (A4) of the manhole door and then extend to the lower part of the middle part of the lower edge (A4) of the manhole door.

2. The HRB manhole door cooling tube arrangement according to claim 1, characterized in that: The left cooling pipe (10a) and the right cooling pipe (10b) have different extension lengths along the upper edge (A1) of the manhole door.

3. The HRB manhole door cooling tube arrangement according to claim 1, characterized in that: The left cooling pipe (10a) and the right cooling pipe (10b) extend to the lower edge (A4) of the manhole door, extend to the lower part of the middle part of the lower edge (A4) of the manhole door, and then extend vertically downward, and the inverted U-shaped cooling pipe (20) is arranged in the area below the lower edge (A4) of the manhole door and between the left cooling pipe (10a) and the right cooling pipe (10b).

4. The HRB manhole opening cooling tube arrangement according to claim 1 or 2 or 3, characterized in that: The horizontal pipe section of the left cooling pipe (10a) and the right cooling pipe (10b) is vertically arranged with the U-shaped cooling pipe (20) above.

5. The HRB manhole door cooling tube arrangement according to claim 4, characterized in that: The left side of the left cooling pipe (10a) at the left edge (A2) of the manhole door is arranged with the straight pipe-shaped cooling pipe (30), the right side of the right cooling pipe (10b) at the right edge (A3) of the manhole door is arranged with the straight pipe-shaped cooling pipe (30), and the left cooling pipe (10a), the right cooling pipe (10b), and the U-shaped cooling pipe (20) are located in the area between the two straight pipe-shaped cooling pipes (30).

6. The HRB manhole door cooling tube arrangement according to claim 5, characterized in that: The left cooling pipe (10a) and the right cooling pipe (10b) are provided with an anticorrosion layer on the surface.

7. The HRB manhole door cooling tube arrangement according to claim 5, characterized in that: The left cooling pipe (10a), the right cooling pipe (10b), the U-shaped cooling pipe (20), and the straight pipe-shaped cooling pipe (30) are located in the same plane.

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