A boiler slag cooler and a method of installing the same

Abstract

This invention discloses a boiler slag cooler and its installation method. The left side of the cylinder is the inlet end, and the right side of the cylinder is the outlet end. The tube bank assembly has multiple sets evenly distributed in the inner cavity of the cylinder. The rightmost side of each set of finned tubes is connected to an elbow. The upper end of the elbow extends through the inner cavity of the cylinder to the outside and connects to the water collection tank. Several external water pipes are fixedly connected to the outside of the cylinder. The spiral assembly has multiple sets evenly distributed in the inner cavity of the cylinder. The spiral assembly includes several sets of different blades. Multiple sets of blades are sequentially and continuously fixedly connected to the inner wall of the cylinder from the inlet end to the outlet end. This application effectively solves the problem of the heating surface by increasing the pipe diameter, increasing the number of tube banks, and changing the structure of the finned tubes. At the same time, replacing the spiral blades according to the actual situation of the cylinder further reduces internal wear and greatly improves the service life of the device.

Description

Technical Field

[0001] This invention relates to a slag cooler, and more specifically to a boiler slag cooler and its installation method. Background Technology

[0002] The slag cooler, also known as a slag cooler, mainly consists of a cylinder, a slag inlet box, a slag outlet box, a power transmission device, a base frame, and an electrical control system. Both the cylinder and the partition frame adopt a water-cooled wall structure, and slag guide plates are welded on the inner wall of the cylinder and the partition frame.

[0003] Existing slag coolers often experience severe wear and tear on their internal pipes during operation, resulting in overall thinning and significant wear on the internal spiral blades. This greatly reduces the output of the slag cooler, leading to low working efficiency and affecting the safe and stable operation of the unit.

[0004] Chinese patent CN202927835U discloses a pipe-type drum slag cooler. This patent solves the problems of insufficient slag discharge, easy coking, and easy blockage of the slag discharge pipe by placing the slag conveying pipe in the middle and setting an outer cylinder outside the slag conveying pipe, so that the outer cylinder and the slag conveying pipe form a closed water cavity. A return water pipe is set outside the water cavity, which connects to the water outlet device. The slag conveying pipe has multiple spiral blades built in, which solves the problems of insufficient slag discharge, easy coking, and easy blockage of the slag conveying pipe. However, the inlet and outlet spiral blades in this application have the same structure and no difference from one to the other. The internal temperature of the slag cooler varies at different locations. The effect of reducing losses by a fixed spiral blade is not as good as that of multiple sets of variable spiral blades. Summary of the Invention

[0005] The technical problem to be solved by this invention is: how to reduce the wear and tear of internal parts of a slag cooler.

[0006] This invention solves the above-mentioned technical problems through the following technical means: a boiler slag cooler, comprising a cylinder, a tube bank assembly, a spiral assembly, and a water collection tank. The left side of the cylinder is the inlet end, and the right side of the cylinder is the outlet end. The tube bank assembly has multiple sets of tubes evenly distributed in the inner cavity of the cylinder. Each set of tube bank assemblies includes several finned tubes. The rightmost side of each set of finned tubes is connected to an elbow. The upper end of the elbow extends through the inner cavity of the cylinder to the outside and connects to the water collection tank. Several external water pipes are fixedly connected to the outside of the cylinder. The water collection tank is connected to the external water pipes. The spiral assembly has multiple sets of tubes evenly distributed in the inner cavity of the cylinder. The spiral assembly includes several sets of different blades. Multiple sets of tubes are sequentially and continuously fixedly connected to the inner wall of the cylinder from the inlet end to the outlet end, and are alternately installed with the tube bank assembly.

[0007] This application increases the heating surface of the inner cavity of the cylinder by setting up several groups of pipe row assemblies and setting up several pipe row assemblies in each group, so that they extend to the outside through elbows and connect to the water collection tank. This reduces wear and internal stress to a certain extent. Furthermore, by sequentially and continuously fixing different spiral assemblies from the inlet end to the outlet end to the inner cavity of the cylinder, internal wear is further reduced.

[0008] Preferably, the tube array assembly consists of 12 groups, and each group of the tube array assembly includes 3 "cross-shaped" finned tubes with a specification of φ60×7.

[0009] Advantages: Increasing the number of finned tubes, increasing the inner diameter of the finned tubes, and changing the structure of the finned tubes effectively solves the problem of the heat transfer surface.

[0010] Preferably, each group of finned tubes has a bent tube welded to its front end, and each group of finned tubes is connected in parallel through the bent tube.

[0011] Preferably, the tube assembly includes a fixing bolt, and a connecting plate is sleeved on the outside of each group of finned tubes. One end of the fixing bolt extends through the connecting plate to the outside and is screwed to a nut.

[0012] Advantages: Effectively prevents the finned tubes from loosening during use.

[0013] Preferably, each group of pipe assembly is fixedly connected to a number of fixing clips on its outer side, and the open end of the fixing clip is fixedly connected to the inner wall of the cylinder.

[0014] Advantages: It ensures the overall stability of the pipe row assembly.

[0015] Preferably, the blades include a number of first spiral blades that are several times the number of tube assembly components, the inlet end of the cylinder is provided with a reserved area, the first spiral blades are all welded at equal intervals around the reserved area, and a spiral guide vane is welded between every two first spiral blades.

[0016] Advantages: The small inlet end effectively improves the flow guidance effect.

[0017] Preferably, the blade further includes a second spiral blade, a third spiral blade, and a fourth spiral blade corresponding to the number of tube array assemblies. The second spiral blade is located to the right of the first spiral blade, the third spiral blade is located to the right of the second spiral blade, and the fourth spiral blade is located to the right of the third spiral blade. A spiral guide vane is fixedly connected between each pair of second spiral blades, third spiral blades, and fourth spiral blades. Both sides of the spiral guide vane are fixedly connected to their corresponding second spiral blades, third spiral blades, and fourth spiral blades, respectively.

[0018] Advantages: The specific installation is tailored to the dimensions of the slag cooler, which effectively improves the flow rate of the slag cooler.

[0019] Preferably, the thickness of the spiral guide vane is matched with its corresponding first spiral blade, second spiral blade, third spiral blade, and fourth spiral blade.

[0020] Preferably, each of the plurality of spiral guide vanes has a longitudinal guide vane on one side, and the plurality of longitudinal guide vanes are welded to the inner cavity of the cylinder.

[0021] Advantages: Provides flow rate for the slag cooler.

[0022] Preferably, the lower end of the external water pipe is connected to the cylinder opening assembly, the cylinder opening assembly includes a water inlet pipe, the water inlet pipe is generally of an "L-shaped" structure, with a vertical end and a planar end, the vertical end of the water inlet pipe is connected to the external water pipe, the planar end extends through the inner wall of the cylinder to the outside, a return water pipe is sleeved on the outside of the planar end of the water inlet pipe, and the lower end of the return water pipe is connected to a return water branch pipe.

[0023] Advantages: It ensures internal circulation within the cylinder.

[0024] Preferably, the upper and lower ends of the return water pipe are fixedly connected with stiffening plates, and the corresponding ends of the two stiffening plates are fixedly connected to the inner wall of the cylinder.

[0025] Preferably, a blocking plate is fixedly connected to the front end of the return water pipe, and several reinforcing plates are fixedly connected to the upper end of the return water pipe.

[0026] Advantages: Effectively prevents water leakage.

[0027] Preferably, the water collection tank has a through hole on its outer side corresponding to the external water pipe, and both ends of the external water pipe are fixedly connected to a drain valve.

[0028] According to the above-mentioned boiler slag cooler and its installation method, the following steps are included: measuring the overall size of the cylinder, selecting different thicknesses and numbers of blades according to the size of the cylinder and the temperature range of the inner cavity, and then welding multiple sets of blades sequentially from the inlet end to the outlet end onto the inner wall of the cylinder, which are alternately installed with the pipe assembly. There are several pipe assemblies, and the end of the pipe assembly is connected to the water collection tank through an elbow.

[0029] The advantages of this invention are as follows: by setting several groups of pipe row assemblies and setting several pipe row assemblies in each group, so that they extend to the outside through elbows and connect with the water collection tank, the heating surface of the inner cavity of the cylinder is increased, which reduces wear and internal stress to a certain extent. Furthermore, by sequentially and continuously fixing different spiral assemblies from the inlet end to the outlet end to the inner cavity of the cylinder, internal wear is further reduced, and the service life of this device is greatly improved.

[0030] The problem of the heating surface is solved by increasing the pipe diameter, increasing the number of pipe rows, and increasing the pipe fins. The increase in the heating surface can reduce wear and internal stress to a certain extent, which greatly improves the practicality of this application.

[0031] By installing a water collection tank on the outside of the cylinder, the 12 sets of internal pipes are first connected to the collection tank, and then evenly distributed to the 8 sets of external pipes, which can effectively solve the problem of incompatibility between the internal and external pipes and greatly save costs. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall front sectional view of a boiler slag cooler according to an embodiment of the present invention;

[0033] Figure 2 This is a partial front sectional view of a boiler slag cooler according to an embodiment of the present invention;

[0034] Figure 3 This is a partial structural schematic diagram of a boiler slag cooler according to an embodiment of the present invention;

[0035] Figure 4 This is a partial structural schematic diagram of a boiler slag cooler according to an embodiment of the present invention;

[0036] Figure 5 This is a partial front sectional view of a boiler slag cooler according to an embodiment of the present invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged structural diagram of section A;

[0038] Figure 7 For the present invention Figure 5 Enlarged structural diagram of section B;

[0039] Figure 8 This is a partial left-side sectional view of a boiler slag cooler according to an embodiment of the present invention;

[0040] Figure 9 This is a partial right-side sectional view of a boiler slag cooler according to an embodiment of the present invention;

[0041] Figure 10 This is a partial front sectional view of a boiler slag cooler according to an embodiment of the present invention;

[0042] Figure 11 for Figure 8 Enlarged schematic diagram of a local part of the structure.

[0043] In the diagram: 1-Cylinder body; 11-External water pipe; 12-Water drain valve; 13-Reserved area; 2-Pipe assembly; 21-Fin tube; 22-Connecting plate; 23-Bend; 24-Fixing clamp; 25-Elbow; 26-Fixing bolt; 3-Spiral assembly; 31-Blade; 311-First spiral blade; 312-Second spiral blade; 313-Third spiral blade; 314-Fourth spiral blade; 32-Longitudinal spiral blade; 33-Spiral guide vane; 34-Longitudinal guide vane; 4-Cylinder inlet assembly; 41-Inlet pipe; 42-Return pipe; 43-Return branch pipe; 44-Blocking plate; 45-Reinforcing plate; 46-Firming plate; 5-Water collection tank; 51-Through hole. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] See Figure 1 This embodiment discloses a boiler slag cooler, including a cylinder 1, a pipe assembly 2, a spiral assembly 3, and a cylinder inlet assembly 4.

[0046] See also Figure 1-2 The cylinder 1 has a rectangular structure. The left side of the cylinder 1 is the inlet end and the right side of the cylinder 1 is the outlet end. The cylinder 1 includes an external water pipe 11, a drain valve 12, and a reserved area 13. There are several external water pipes 11, specifically eight, which are all fixedly installed on the upper outer side of the cylinder 1. The upper ends of the external water pipes 11 are fixedly connected to the drain valves 12 on both sides near the inlet and outlet ends, respectively.

[0047] In this embodiment, the inner cavity of the cylinder 1 is provided with a reserved area 13 at the inlet end.

[0048] Also refer to 2-4. The pipe assembly 2 is provided in several groups, preferably 12 groups, which are distributed at equal intervals in the inner cavity of the cylinder 1. The pipe assembly 2 includes finned tubes 21, connecting plates 22, bends 23, fixing clamps 24, elbows 25, and fixing bolts 26. Every 3 finned tubes 21 form a group. All finned tubes 21 are "cross-shaped" steel pipes with a specification of φ60×7.

[0049] Each set of finned tubes 21 is fitted with a connecting plate 22 on the outside. One end of the fixing bolt 26 extends through the connecting plate 22 to the outside and is screwed with a nut, which effectively prevents the finned tubes 21 from loosening during use.

[0050] In this embodiment, each group of finned tubes 21 has a bent tube 23 welded to its front end, and the three blades 31 in each group are connected in parallel through the bent tube 23.

[0051] Multiple sets of fixing clips 24 are provided, and each set of fixing clips 24 is fixedly sleeved on the outside of each set of finned tubes 21. The ends of the fixing clips 24 are welded to the inner wall of the cylinder 1, which effectively ensures the overall stability of the tube assembly 2.

[0052] In this embodiment, each group of finned tubes 21 is connected to a common elbow 25 on its rightmost side. The upper end of the elbow 25 passes through the inner cavity of the cylinder 1 and extends to the outside.

[0053] Referring also to 1, 5-9, the spiral assembly 3 includes blades 31 and 32, a spiral guide vane 33, and a longitudinal guide vane 34. Several sets of blades 31 are provided, and the multiple sets of blades 31 are sequentially and continuously fixedly connected to both sides of multiple finned tubes 21 from the inlet end to the outlet end. The blades 31 include a first spiral blade 311, a second spiral blade, a longitudinal spiral blade 312, a third spiral blade 313, and a fourth spiral blade 314. The multiple first spiral blades 311 are all located on the leftmost side of the inner cavity of the cylinder 1. The second spiral blade, the longitudinal spiral blade 312, is sequentially welded to the right side of the first spiral blade 311. The third spiral blade 313 is sequentially connected to the right side of the second spiral blade, the longitudinal spiral blade 312, and the fourth spiral blade 314 is sequentially connected to the right side of the third spiral blade 313.

[0054] The first spiral blades 311 are equidistantly welded to the inner cavity of the cylinder 1 around the reserved area 13. There are 48 first spiral blades 311 per circumference. The thickness of each first spiral blade 311 is 12mm. The total length of the first spiral blades 311 is 660mm. There is equipment at the inlet end of the slag cooler, which makes the first spiral blades 311 densely arranged per circumference at the inlet end, effectively improving the flow rate of the device, increasing the heating surface, and effectively reducing internal wear.

[0055] In this embodiment, a 32 is welded together between the roots of every two first spiral blades 311, and the thickness of the 32 corresponds to that of the first spiral blade 311.

[0056] The second spiral blade 312 has several longitudinal spiral blades that are equally spaced and welded to the inner cavity of the cylinder 1. There are 12 longitudinal spiral blades 312 per circumference, located on both sides of the tube assembly 2. The thickness of the second spiral blade 312 is 14mm. The total length of the second spiral blade 312 is 1800mm. This position is the highest temperature inside the slag cooler. The thickened second spiral blade 312 can reduce blade wear and greatly extend the service life of the second spiral blade 312.

[0057] In this embodiment, a spiral guide vane 33 is alternately welded between each pair of second spiral longitudinal spiral blades 312. The spiral guide vane 33 is welded to the inner wall of the cylinder 1, and both sides of the spiral guide vane 33 are welded to the second spiral longitudinal spiral blades 312 on both sides by means of 32. The thickness of 32 and spiral guide vane 33 corresponds to the thickness of the second spiral longitudinal spiral blades 312.

[0058] The third spiral blade 313 has several evenly spaced welded to the inner cavity of the cylinder 1. The third spiral blade 313 has 12 blades per cycle, located on both sides of the pipe assembly 2. The thickness of the third spiral blade 313 is 10mm, and the total thickness of the third spiral blade 313 is 2000mm.

[0059] In this embodiment, a spiral guide vane 33 is alternately welded between each pair of third spiral blades 313. The spiral guide vanes 33 are all welded to the inner wall of the cylinder 1, and both sides of the spiral guide vane 33 are welded to the third spiral blades 313 on both sides through 32. The thickness of 32 and spiral guide vane 33 corresponds to the thickness of the third spiral blade 313.

[0060] The fourth spiral blade 314 has several evenly spaced welded to the inner cavity of the cylinder 1. The fourth spiral blade 314 has 12 blades per cycle, located on both sides of the pipe assembly 2. The thickness of the fourth spiral blade 314 is 8mm. The total thickness of the fourth spiral blade 314 is 4848mm. This position is close to the outlet end of the cylinder 1, where the temperature is lower than that at the front end. The use of 8mm blades effectively controls the cost.

[0061] In this embodiment, a spiral guide vane 33 is alternately welded between each pair of fourth spiral blades 314. The spiral guide vanes 33 are all welded to the inner wall of the cylinder 1, and both sides of the spiral guide vane 33 are welded to the fourth spiral blades 314 on both sides through 32. The thickness of 32 and spiral guide vane 33 corresponds to that of the third spiral blade 313.

[0062] Several longitudinal guide vanes 34 are provided, all welded at equal intervals to the inner wall of the cylinder 1, and are located at the middle of the front end of the second spiral vane 312, the third spiral vane 313, and the fourth spiral vane 314, respectively, which effectively improves the flow rate of the blades.

[0063] In this embodiment, the first spiral blade 311, the second spiral blade longitudinal spiral blade 312, the third spiral blade 313, and the fourth spiral blade 314 are all "fan-shaped" structures, and 32 are all "rectangular" structures. The welding of 32, blade 31, and inner wall of the inner cylinder adopts continuous weld seams, which effectively ensures the heat transfer efficiency of the blade.

[0064] Furthermore, multiple blades 31 are connected end to end along the spiral line of the cylinder wall to form a spiral blade. The joints of adjacent spiral blades are staggered in the axial direction to ensure their support for the inner cylinder wall under external pressure.

[0065] Furthermore, the radial joints of all blades 31 and 32 are not welded to facilitate the release of thermal stress.

[0066] Referring also to 10-11, the cylinder outlet assembly 4 is located at the outlet end of the cylinder 1 and includes an inlet pipe 41, a return pipe 42, a return branch pipe 43, a plug plate 44, a reinforcing plate 45, and a stiffener plate 46. The inlet pipe 41 has an overall "L-shaped" structure and is provided with a vertical end and a planar end. The vertical end of the inlet pipe 41 is connected to the external water pipe 11, and the planar end extends through the inner wall of the cylinder 1 to the outside. The return pipe 42 is sleeved on the outside of the planar end of the inlet pipe 41, and the lower end of the return pipe 42 is connected to the return branch pipe 43.

[0067] The blocking plate 44 is fixedly connected to the front end of the return water pipe 42, and the reinforcing plate 45 is fixedly connected to the upper end of the return water pipe 42, effectively preventing water leakage.

[0068] Two stiffeners 46 are provided, located at the upper and lower ends of the return water pipe 42 respectively, and the corresponding ends of the two stiffeners 46 are fixedly connected to the inner wall of the cylinder 1, ensuring the overall stability of the cylinder opening assembly 4.

[0069] See Figure 10 The water collection tank 5 is fixedly installed on the upper outer side of the cylinder 1. The lower end of the water collection tank 5 is connected to 12 sets of elbows 25. The end of the water collection tank 5 corresponding to the external water pipe 11 is provided with a number of through holes 51, which effectively solves the problem of incompatibility between the inside and outside.

[0070] The working principle of this embodiment is as follows: The operator first measures the overall dimensions of the cylinder 1, and selects the thickness and number of multiple sets of blades 31 according to the temperature of the inner cavity of the cylinder 1. Then, the multiple sets of blades 31 are sequentially welded to the inner wall of the cylinder 1 from the inlet end to the outlet end. At the same time, the number of pipe row assemblies 2 is increased, the inner diameter of the pipe row assemblies 2 is increased, and the structure of the finned tubes 21 is changed so that the multiple sets of pipe row assemblies 2 are all located between two blades 31. An elbow 25 is connected to the end of the pipe row assembly 2 so that it extends to the outside and connects to the water collection tank 5, so that it matches the external water pipe 11 on the outside of the cylinder 1. This application effectively solves the problem of the heating surface by increasing the pipe diameter, increasing the number of pipe rows, and changing the structure of the finned tubes 21, thereby reducing the wear of parts and internal stress. At the same time, replacing the spiral blades according to the actual situation of the cylinder 1 further reduces internal wear, greatly improves the service life of the device, and improves the practicality of this application.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A boiler slag cooler, characterized in that, The system includes a cylinder (1), a pipe assembly (2), a spiral assembly (3), and a water collection tank (5). The left side of the cylinder (1) is the inlet end, and the right side of the cylinder (1) is the outlet end. The pipe assembly (2) has multiple sets of pipes evenly distributed in the inner cavity of the cylinder (1). Each set of pipe assemblies (2) includes several finned tubes (21). The rightmost side of each set of finned tubes (21) is connected to an elbow (25). The upper end of the elbow (25) extends through the inner cavity of the cylinder (1) to the outside and connects to the water collection tank (5). 1) Several external water pipes (11) are fixedly connected to the outside of the cylinder (1). The water collection tank (5) is connected to the external water pipes (11). The spiral assembly (3) is provided with several sets of equally spaced distributions in the inner cavity of the cylinder (1). The spiral assembly (3) includes several sets of different blades (31). Multiple sets of blades (31) are continuously fixedly connected to the inner wall of the cylinder (1) from the inlet end to the outlet end, and are alternately installed with the pipe assembly (2). Each set of pipe assembly (2) includes 3 "cross-shaped" finned tubes (21) with a specification of φ60×7. The blade (31) also includes a second spiral longitudinal spiral blade (312), a third spiral blade (313), and a fourth spiral blade (314) corresponding to the number of tube assembly (2). The second spiral longitudinal spiral blade (312) is located to the right of the first spiral blade (311), the third spiral blade (313) is located to the right of the second spiral longitudinal spiral blade (312), and the fourth spiral blade (314) is located to the right of the third spiral blade (313). A spiral guide vane (33) is fixedly connected between each pair of second spiral longitudinal spiral blades (312), third spiral blades (313), and fourth spiral blades (314). Both sides of the spiral guide vane (33) are fixedly connected to their corresponding second spiral longitudinal spiral blades (312), third spiral blades (313), and fourth spiral blades (314) through longitudinal spiral blades (32). Each of the several spiral guide vanes (33) has a longitudinal guide vane (34) on one side, and the longitudinal guide vanes (34) are welded to the inner cavity of the cylinder (1).

2. A boiler slag cooler according to claim 1, characterized in that, The pipe array assembly (2) consists of 12 groups.

3. A boiler slag cooler according to claim 1, characterized in that, Each group of finned tubes (21) has a bend (23) welded to its front end, and each group of finned tubes (21) is connected in parallel through the bend (23).

4. A boiler slag cooler according to claim 1, characterized in that, The tube assembly (2) includes a fixing bolt (26), and a connecting plate (22) is sleeved on the outside of each group of finned tubes (21). One end of the fixing bolt (26) extends through the connecting plate (22) to the outside and is screwed to a nut.

5. A boiler slag cooler according to claim 1, characterized in that, Each pipe assembly (2) has several fixing clips (24) fixedly connected to its outer side, and the open end of the fixing clip (24) is fixedly connected to the inner wall of the cylinder (1).

6. A boiler slag cooler according to claim 1, characterized in that, The blade (31) includes a number of first spiral blades (311) that are several times the number of tube assembly (2). The inlet end of the cylinder (1) is provided with a reserved area (13). The first spiral blades (311) are all welded at equal intervals around the reserved area (13), and a spiral guide vane (33) is welded between every two first spiral blades (311).

7. A boiler slag cooler according to claim 1, characterized in that, The thickness of the longitudinal spiral blade (32) and the spiral guide vane (33) are respectively matched with the corresponding first spiral blade (311), second spiral blade, longitudinal spiral blade (312), third spiral blade (313), and fourth spiral blade (314).

8. A boiler slag cooler according to claim 1, characterized in that, The lower end of the external water pipe (11) is connected to the cylinder mouth assembly (4). The cylinder mouth assembly (4) includes an inlet pipe (41). The inlet pipe (41) is an "L-shaped" structure with a vertical end and a planar end. The vertical end of the inlet pipe (41) is connected to the external water pipe (11), and the planar end extends through the inner wall of the cylinder (1) to the outside. A return water pipe (42) is sleeved on the outside of the planar end of the inlet pipe (41), and the lower end of the return water pipe (42) is connected to a return water branch pipe (43).

9. A boiler slag cooler according to claim 8, characterized in that, The upper and lower ends of the return water pipe (42) are fixedly connected with stiffening plates (46), and the corresponding ends of the two stiffening plates (46) are fixedly connected to the inner wall of the cylinder (1).

10. A boiler slag cooler according to claim 8, characterized in that, The front end of the return water pipe (42) is fixedly connected to a blocking plate (44), and the upper end of the return water pipe (42) is fixedly connected to several reinforcing plates (45).

11. A boiler slag cooler according to claim 1, characterized in that, The outer side of the water collection tank (5) is provided with a through hole (51) corresponding to the external water pipe (11), and both ends of the external water pipe (11) are fixedly connected with a drain valve (12).

12. The installation method of a boiler slag cooler according to any one of claims 1-11, characterized in that, The process includes the following steps: measuring the overall dimensions of the cylinder (1), selecting different thicknesses and quantities of blades (31) based on the dimensions of the cylinder (1) and the temperature range of the inner cavity, and then welding multiple sets of blades (31) sequentially from the inlet end to the outlet end onto the inner wall of the cylinder (1), and installing them alternately with the pipe assembly (2). The pipe assembly (2) has several components, and the end of the pipe assembly (2) is connected to the water collection tank (5) through an elbow (25).

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