Double-elbow double-tube-row modular slag cooler inner tube row

Abstract

The utility model relates to the technical field of slag coolers, in particular to a double-elbow double-tube-bundle modular inner tube bundle of a slag cooler, which comprises four parallel straight tubes, a plurality of heat exchange tubes and a plurality of heat exchange tubes. The two ends of the outer U-shaped pipe are welded or integrally formed with the same-side ends of the two straight pipes on the outermost side respectively; the inner U-shaped pipe is located on the inner side of the outer U-shaped pipe, and the two ends of the inner U-shaped pipe and the same-side ends of the two straight pipes on the innermost side are welded or integrally formed. The two Y-shaped pipes are arranged on the sides, away from the large U-shaped pipe and the small U-shaped pipe, of all the straight pipes. Each Y-shaped pipe is welded with two adjacent straight pipes which are respectively welded with the large U-shaped pipe and the small U-shaped pipe; and the inner diameters of the outer U-shaped pipe, the inner U-shaped pipe and the straight pipe are consistent. The pressure fluctuation of the heat exchange tube set is small, and the possibility of water leakage of welding seams is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cold slag machine technology, and in particular to a double-bend double-pipe modular cold slag machine inner pipe arrangement. Background Technology

[0002] As a boiler auxiliary machine, the function of the ash cooler is to cool the ash and slag produced after combustion in the boiler. The ash and slag exchange heat with cooling water through the ash cooler, and the circulating cooling water carries away most of the heat from the ash and slag, thus achieving cooling.

[0003] Chinese patent CN201858638 U discloses a novel double-layer Y-shaped pipe structure for a drum slag cooler, comprising an outer cylinder wall, an outer parallel pipe unit, an outer slag-collecting blade, an inner parallel pipe unit, an inner slag-collecting blade, an outer spiral channel, and an inner spiral channel. The inner wall of the outer cylinder wall is uniformly provided with several outer parallel pipe units and outer slag-collecting blades. The inner side of the outer parallel pipe unit is concentrically provided with an outer spiral channel formed by several spiral blades. The inner diameter of the outer spiral channel is uniformly provided with several circumferentially arranged inner parallel pipe units and inner slag-collecting blades. The inner side of the parallel pipe unit is concentrically provided with an inner spiral channel formed by several spiral blades. The external parallel pipe unit and the internal parallel pipe unit are composed of series U-shaped pipes, Y-shaped pipes, inlet water headers and return water headers. Two steel pipes are welded together to form a parallel pipe unit. One end of the Y-shaped pipe of the two parallel pipe units is connected to the adjacent parallel pipe unit Y-shaped pipe through series U-shaped pipes. The other end of the Y-shaped pipe is welded to the inlet water header and the return water header respectively to form a series loop.

[0004] In the above structure, the Y-shaped pipes of two adjacent parallel pipe units are connected to both ends of the same series U-shaped pipe, forming a series loop. Near the series U-shaped pipe, the flow area in the series loop will first decrease and then increase, causing pressure fluctuations in the series loop and increasing the risk of leakage at the pipe welds. Utility Model Content

[0005] To address the shortcomings of related technologies, this utility model provides a double-bend double-pipe modular cold slag machine inner pipe bank. The ends of the two straight pipes furthest from the inlet and outlet water are connected by a bend, which reduces pressure fluctuations within the inner pipe bank and lowers the possibility of weld leakage.

[0006] This utility model provides a double-bend, double-pipe modular internal pipe array for a slag cooler, comprising: multiple heat exchanger tube assemblies arranged around the axis of the slag cooler. The heat exchanger tube assemblies include:

[0007] Four straight pipes are installed in parallel.

[0008] The outer U-shaped tube is welded to or integrally formed with the ends of the two outermost straight tubes on the same side.

[0009] The inner U-shaped tube is located inside the outer U-shaped tube, and its two ends are welded to the same side ends of the two innermost straight tubes or integrally formed.

[0010] Two Y-shaped pipes are installed on the side of all straight pipes away from the large and small U-shaped pipes. Each Y-shaped pipe is welded with two adjacent straight pipes, which are respectively welded to the large and small U-shaped pipes.

[0011] The inner diameters of the outer U-shaped tube, inner U-shaped tube, and straight tube are the same.

[0012] In some embodiments, the inner tube bank further includes a cylindrical wall. All heat exchange tube assemblies are welded inside the cylindrical wall.

[0013] In some embodiments, the inner tube bank further includes: a guide plate with grooves for accommodating straight tubes, multiple plates of which are spirally distributed inside all heat exchange tube groups and welded to the straight tubes.

[0014] In some embodiments, the grooves correspond one-to-one with the straight tubes, and each straight tube is welded to the wall of its corresponding groove.

[0015] In some embodiments, a gap is left between two adjacent guide plates.

[0016] In some embodiments, each feed plate is welded to only one heat exchange tube assembly.

[0017] In some embodiments, the inner tube bank further includes: a reinforcing plate. Each guide plate corresponds to at least one reinforcing plate, the reinforcing plate is welded to the corresponding guide plate, and the reinforcing plate is welded to the straight tube.

[0018] In some embodiments, each guide plate and its connected reinforcing plate are welded to the same heat exchange tube assembly.

[0019] In some embodiments, multiple sets of reinforcing plates are provided for a single heat exchange tube assembly, with multiple reinforcing plates in each set. The reinforcing plates in different sets are welded to different straight tubes, and all reinforcing plates in the same set are welded to the same straight tube and parallel to the axis of the straight tube. There is a gap between each reinforcing plate and its adjacent guide plate or adjacent reinforcing plate in the same set.

[0020] In some embodiments, the side of the reinforcing plate closest to the cylinder wall axis is inclined in the direction of ash and slag flow within the cylinder wall.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. Within the heat exchanger tube assembly, the flow area of ​​the straight tubes, outer U-shaped tubes, and inner U-shaped tubes is consistent, which makes it less prone to pressure fluctuations and reduces the possibility of weld leakage.

[0023] 2. Each heat exchange tube assembly, along with its corresponding multiple guide plates and multiple reinforcing plates, constitutes a heat exchange unit. The heat exchange unit can be welded to the outside of the cylinder wall first and then welded to the inside of the tube wall to reduce the welding difficulty of the guide plates and reinforcing plates inside the cylinder wall. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the heat exchanger tube assembly of this utility model;

[0026] Figure 2 This diagram illustrates the installation positions of the guide plate and reinforcing plate in this utility model.

[0027] In the diagram: 11. Straight pipe; 12. Outer U-shaped pipe; 13. Inner U-shaped pipe; 14. Y-shaped pipe; 2. Guide plate; 3. Reinforcing plate. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] like Figure 1-2 As shown in the embodiment of the double-bend double-pipe modular cold slag machine inner pipe array of this utility model, the inner pipe array of the double-bend double-pipe modular cold slag machine includes at least: heat exchange tube assemblies, multiple of which are arranged around the axis of the cold slag machine. The heat exchange tube assemblies include:

[0033] Straight pipe 11, four of them are set in parallel.

[0034] The outer U-shaped tube 12 is welded or integrally formed at both ends to the same side ends of the two outermost straight tubes 11.

[0035] The inner U-shaped tube 13 is located inside the outer U-shaped tube 12, and its two ends are welded to the same side ends of the two innermost straight tubes 11 or integrally formed.

[0036] Two Y-shaped pipes 14 are installed on the side of all straight pipes 11 away from the large U-shaped pipe and the small U-shaped pipe. Each Y-shaped pipe 14 is welded with two adjacent straight pipes 11, which are respectively welded to the large U-shaped pipe and the small U-shaped pipe. One Y-shaped pipe 14 is used for water inlet, and the other Y-shaped pipe 14 is used for water outlet.

[0037] The inner diameters of the outer U-shaped tube 12, the inner U-shaped tube 13, and the straight tube 11 are the same.

[0038] Inside the heat exchange tube assembly, the straight tube 11 has the same flow area as the outer U-shaped tube 12 and the inner U-shaped tube 13, which makes it less likely to generate pressure fluctuations and reduces the possibility of water leakage at the weld.

[0039] Furthermore, both the outer U-shaped tube 12 and the inner U-shaped tube 13 are welded to the straight tube 11 to reduce the processing difficulty of the heat exchange tube assembly.

[0040] In some embodiments, the inner tube bank further includes a cylindrical wall. All heat exchange tube assemblies are welded inside the cylindrical wall. The cylindrical wall is fixed to the body of the slag cooler, and the cylindrical wall is collinear with the axis of the slag cooler, connecting all heat exchange tube assemblies into one unit. (Cylinder wall, not shown in the figure.)

[0041] Furthermore, the inner pipe arrangement also includes: an inlet pipe, which is annular and fixed inside the cylinder wall, connected to all the Y-shaped pipes 14 used for water inlet; and an outlet pipe, which is annular and fixed inside the cylinder wall, connected to all the Y-shaped pipes 14 used for water outlet. The inlet and outlet pipes are not shown in the figure.

[0042] In some embodiments, the inner tube bank further includes: guide plates 2, which are provided with grooves to accommodate straight tubes 11, and are arranged in a spiral pattern on the inner side of all heat exchange tube assemblies, and are welded to the straight tubes 11. All guide plates 2 form a spiral guide channel in all heat exchange tube assemblies, used to guide the ash and slag in the slag cooler from the slag inlet to the slag outlet. The grooves are not shown in the figure.

[0043] In some embodiments, the grooves correspond one-to-one with the straight tubes 11, and each straight tube 11 is welded to its corresponding groove wall to increase the weld length between the heat exchange tube assembly and the guide plate 2 and improve the connection strength between the two.

[0044] In some embodiments, a gap is left between two adjacent guide plates 2 to allow for expansion space of the guide plates 2, so as to avoid the two adjacent guide plates 2 from squeezing each other after thermal expansion, which helps to extend the service life of the guide plates 2.

[0045] In some embodiments, each guide plate 2 is welded to only one heat exchange tube assembly. Each heat exchange tube assembly and its corresponding multiple guide plates 2 constitute a heat exchange unit. The heat exchange unit can be welded to the outside of the cylinder wall first and then welded to the inside of the tube wall to reduce the welding difficulty of the guide plate 2 inside the cylinder wall.

[0046] In some embodiments, the inner tube bank further includes a reinforcing plate 3. Each guide plate 2 corresponds to at least one reinforcing plate 3, and the reinforcing plate 3 is welded to the corresponding guide plate 2 and to the straight tube 11. The reinforcing plate 3 is used to improve the connection strength between the guide plate 2 and the straight tube 11.

[0047] In some embodiments, each guide plate 2 and its connected reinforcing plate 3 are welded to the same heat exchange tube assembly. Each heat exchange tube assembly and its corresponding multiple guide plates 2 and multiple reinforcing plates 3 constitute a heat exchange unit. The heat exchange unit can be welded to the outside of the cylinder wall first and then welded to the inside of the tube wall to reduce the welding difficulty of the reinforcing plate 3 inside the cylinder wall.

[0048] In some embodiments, multiple sets of reinforcing plates 3 are provided for each heat exchanger tube assembly, with multiple reinforcing plates 3 in each set. The reinforcing plates 3 of different sets are welded to different straight tubes 11, and all reinforcing plates 3 of the same set are welded to the same straight tube 11 and parallel to the axis of the straight tube 11. The reinforcing plates 3 can help limit the spacing between two adjacent guide plates 2 in the length direction of the heat exchanger tube assembly, preventing the two guide plates 2 from tilting towards each other.

[0049] Furthermore, there is a gap between each reinforcing plate 3 and its adjacent guide plate 2 or adjacent reinforcing plates 3 in the same group, so as to reserve expansion space for the heating plate and avoid mutual compression after the adjacent heating plates expand due to heat, which helps to extend the service life of the heating plate.

[0050] Furthermore, in a single heat exchange tube assembly, two straight tubes 11 are welded with reinforcing plates 3, and between these two straight tubes 11 there is a straight tube 11 without a reinforcing plate 3 welded on.

[0051] In some embodiments, the side of the reinforcing plate 3 closest to the cylinder wall axis is inclined towards the direction of ash flow within the cylinder wall to reduce the obstruction effect of the reinforcing plate 3 on the ash and slag, thus helping the ash and slag to pass through the reinforcing plate 3 quickly. For example, when all the guide plates 2 are arranged in a left-handed spiral, the side of the reinforcing plate 3 closest to the cylinder wall axis is inclined to the left of the cylinder wall axis. When all the guide plates 2 are arranged in a right-handed spiral, the side of the reinforcing plate 3 closest to the cylinder wall axis is inclined to the right of the cylinder wall axis.

[0052] Through the description of several embodiments of the double-bend double-pipe modular cold slag machine inner pipe arrangement of this utility model, it can be seen that the embodiments of the double-bend double-pipe modular cold slag machine inner pipe arrangement of this utility model have at least one or more of the following advantages:

[0053] 1. Inside the heat exchange tube assembly, the flow area of ​​the straight tube 11, the outer U-shaped tube 12, and the inner U-shaped tube 13 is consistent, which makes it less likely to cause pressure fluctuations and reduces the possibility of water leakage at the weld.

[0054] 2. Each heat exchange tube assembly, along with its corresponding multiple guide plates 2 and multiple reinforcing plates 3, constitutes a heat exchange unit. The heat exchange unit can be welded to the outside of the cylinder wall first and then welded to the inside of the tube wall to reduce the welding difficulty of the guide plates 2 and reinforcing plates 3 inside the cylinder wall.

[0055] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0056] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A double-bend type double-pipe modular cold slag machine inner pipe bank, characterized in that, include: Multiple heat exchanger tube assemblies are arranged around the axis of the slag cooler; the heat exchanger tube assemblies include: Four straight pipes are installed in parallel. The outer U-shaped tube is welded to or integrally formed with the ends of the two outermost straight tubes on the same side; The inner U-shaped tube is located inside the outer U-shaped tube, and its two ends are welded to the same side ends of the two innermost straight tubes or integrally formed. Two Y-shaped pipes are installed on the side of all straight pipes away from the large U-shaped pipe and the small U-shaped pipe; each Y-shaped pipe is welded with two adjacent straight pipes, which are respectively welded to the large U-shaped pipe and the small U-shaped pipe; The inner diameters of the outer U-shaped tube, inner U-shaped tube, and straight tube are the same.

2. The inner pipe arrangement of a double-bend type double-pipe modular slag cooler according to claim 1, characterized in that, Also includes: The cylinder wall; all heat exchange tube assemblies are welded inside the cylinder wall.

3. The inner pipe arrangement of a double-bend type double-pipe modular cold slag machine according to claim 2, characterized in that, Also includes: The guide plate has grooves to accommodate straight tubes. Multiple plates are spirally distributed inside all heat exchange tube groups and are welded to the straight tubes.

4. The inner pipe arrangement of a double-bend type double-pipe modular slag cooler according to claim 3, characterized in that, The grooves correspond one-to-one with the straight pipes, and each straight pipe is welded to the wall of its corresponding groove.

5. The inner pipe arrangement of a double-bend type double-pipe modular cold slag machine according to claim 3, characterized in that, A gap is left between two adjacent guide plates.

6. The inner pipe arrangement of a double-bend type double-pipe modular slag cooler according to claim 3, characterized in that, Each feed plate is welded to only one heat exchange tube assembly.

7. The inner pipe arrangement of a double-bend type double-pipe modular slag cooler according to claim 6, characterized in that, Also includes: Reinforcing plates; each guide plate corresponds to at least one reinforcing plate, the reinforcing plates are welded to the corresponding guide plates, and the reinforcing plates are welded to the straight pipes.

8. The inner pipe arrangement of a double-bend type double-pipe modular slag cooler according to claim 7, characterized in that, Each feed plate and its connecting reinforcing plate are welded to the same heat exchange tube assembly.

9. The inner pipe arrangement of a double-bend type double-pipe modular cold slag machine according to claim 8, characterized in that, Multiple sets of reinforcing plates are set for each heat exchange tube group, with multiple reinforcing plates in each set. The reinforcing plates of different sets are welded to different straight tubes. All reinforcing plates in the same set are welded to the same straight tube and are parallel to the axis of the straight tube. There is a gap between each reinforcing plate and its adjacent guide plate or adjacent reinforcing plate in the same set.

10. The inner pipe arrangement of a double-bend type double-pipe modular slag cooler according to claim 7, characterized in that, The side of the reinforcing plate closest to the cylinder wall axis is inclined in the direction of ash and slag flow inside the cylinder wall.

Images