Efficient and energy-saving tail evaporator and boiler

Abstract

The utility model provides an efficient and energy-saving tail evaporator and a boiler, the efficient and energy-saving tail evaporator comprises an evaporator box body, a first header, a second header and a plurality of sets of evaporation pipe assemblies, the multiple sets of evaporation pipe assemblies are installed in the evaporator box body, and high-temperature flue gas is introduced into the evaporator box body; the two ends of the evaporation pipe assembly penetrate through the side wall of the evaporator box to communicate with the first header and the second header correspondingly, and the second header is located above the first header. Each set of evaporation pipe assembly comprises a first evaporation pipe and a plurality of second evaporation pipes, the first ends of the first evaporation pipes are communicated with the second collecting box, the second evaporation pipes on the lowermost layer are communicated with the first collecting box, the adjacent evaporation pipes are communicated, the first evaporation pipes and the second evaporation pipes are arranged on the same vertical plane to form pipe rows, and water enters the evaporation pipes from the first collecting box. High-temperature flue gas makes contact with the pipe rows, the evaporation efficiency of water in the evaporation pipes is improved, meanwhile, even heating is guaranteed, the structure is compact, and the space utilization rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field especially relates to a kind of tail evaporator and boiler of high efficiency energy saving. BACKGROUND

[0002] The tail evaporator of boiler is one of key components in boiler system, mainly used to effectively transfer the heat energy in flue gas to water by heat exchange between flue gas and water, so as to realize the evaporation of water.

[0003] The existing boiler tail evaporator generally uses simple pipeline structure for heat exchange, although it can complete the basic heat exchange task, but its heat exchange efficiency is low. Traditional pipeline arrangement design is often not compact enough, resulting in that the boiler tail evaporator occupies a large space, which adversely affects the overall layout of the boiler. At the same time, due to the suboptimal design of heat exchange surface, the evaporator is easily subjected to local excessive temperature difference or uneven heat exchange under the action of high-temperature flue gas, causing heat energy waste and affecting the thermal efficiency of the boiler. SUMMARY

[0004] The purpose of the present application is to provide a tail evaporator of high efficiency energy saving to solve the problem of low heat exchange efficiency of the tail evaporator of boiler in the prior art. In addition, the purpose of the present application is also to provide a boiler comprising the tail evaporator of high efficiency energy saving.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] The present application provides a tail evaporator of high efficiency energy saving, which comprises an evaporator box, a first header tank, a second header tank and a plurality of groups of evaporating pipe assemblies, wherein:

[0007] The plurality of groups of evaporating pipe assemblies are installed in the evaporator box, high-temperature flue gas is introduced into the evaporator box, the first header tank and the second header tank are installed on the side wall of the evaporator box, the two ends of the evaporating pipe assemblies pass through the side wall of the evaporator box and are in communication with the first header tank and the second header tank respectively, and the second header tank is located above the first header tank;

[0008] Each group of evaporating pipe assemblies comprises a first evaporating pipe and a plurality of second evaporating pipes, the first evaporating pipe is located above the second evaporating pipes, the first end of the first evaporating pipe is in communication with the second header tank, the plurality of first evaporating pipes are arranged horizontally and spaced apart in the vertical direction, the lowermost second evaporating pipe is in communication with the first header tank, the ports between the first evaporating pipe and the second evaporating pipes and the adjacent second evaporating pipes are fixedly connected to communicate with each other, and the first evaporating pipe and the second evaporating pipes are located in the same vertical plane in the first direction to form a tube bank.

[0009] Water enters the second evaporating pipes and the first evaporating pipes in sequence from the first header tank, and high-temperature flue gas contacts the tube bank to efficiently evaporate the water in the pipes.

[0010] Optionally, the first evaporation pipe is communicated with the second evaporation pipe and the adjacent second evaporation pipe through a U-shaped pipe.

[0011] Optionally, the first end of the first evaporation pipe is higher than the second end of the evaporation pipe in the vertical direction, so as to tilt the first evaporation pipe.

[0012] Optionally, a plurality of pipe rows are arranged in the second direction in the evaporator box body, and adjacent pipe rows are staggered.

[0013] Optionally, a reinforcing plate is arranged outside the side plate of the evaporator box body, the reinforcing plates are fixedly connected between each other, and the reinforcing plates are configured to enhance the structural strength of the evaporator box body.

[0014] Optionally, a plurality of groups of first fixing components are arranged side by side in the first direction in the evaporator box body, each group of first fixing components includes a support rod and at least one fixing rod, the support rod is located above the evaporation pipe assembly and penetrates the evaporator box body in the second direction, one end of the fixing rod is fixedly connected with the support rod, the fixing rod penetrates between the pipe rows in the vertical direction, and the fixing rod is fixedly connected with the pipe rows.

[0015] Optionally, at least two support tables are arranged on the reinforcing plate, and the first header and the second header are fixedly installed on the support tables by second fixing components;

[0016] The second fixing component includes a U-shaped fixing piece and a nut, a mounting hole is formed in the support table, the first header is located in the middle of the U-shaped fixing piece, the two ends of the U-shaped fixing piece penetrate through the mounting hole, the two ends of the U-shaped fixing piece are provided with threads, the nut is matched with the threads, and the nut is tightened on one side of the support table, so as to fix the first header on the other side of the support table.

[0017] Optionally, the first evaporation pipe and the second evaporation pipe are finned tubes.

[0018] Optionally, the outermost U-shaped pipe is provided with a flow guide plate towards the upper end and the lower end of the evaporator box body, and the flow guide plate is configured to guide the flow of high-temperature flue gas, so as to concentrate the high-temperature flue gas towards the first evaporation pipe and the second evaporation pipe.

[0019] A boiler comprising the above-mentioned high-efficiency and energy-saving tail evaporator.

[0020] Compared with the prior art, the high-efficiency and energy-saving tail evaporator has the following advantages:

[0021] 1) Through the cooperation of the evaporator box body, the first header, the second header and the plurality of groups of evaporation pipe assemblies, not only the sufficient contact of the high-temperature flue gas with the evaporation pipe assemblies is ensured, the heat exchange efficiency is improved, but also the structure is compact, and the space utilization rate in the evaporator box body is improved.

[0022] 2) Through the cooperation of the fixed rod and the supporting rod, the stability of the tube row is improved, preventing the evaporation tube from loosening or displacement during operation, and improving the safety of the equipment operation.

[0023] 3) Through the cooperation of the supporting table, the U-shaped fixing piece and the nut, not only the stable installation of the first header and the second header is realized, but also the structure is convenient to operate.

[0024] 4) Through the cooperation between the guide plates, the flow efficiency of the high-temperature flue gas is improved, the heat is concentrated to the surface of the evaporation tube, and the leakage of the high-temperature flue gas through the connection between the evaporation tube and the evaporator box is avoided, ensuring the safety and reliability of the equipment operation. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present application, the drawings needed to be used in the background and embodiment description of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the content of the embodiments of the present application and the drawings by those skilled in the art without creative labor.

[0026] Figure 1 is a cross-sectional view of the high-efficiency energy-saving tail evaporator provided by the embodiments of the present application;

[0027] Figure 2 is a top view of the high-efficiency energy-saving tail evaporator provided by the embodiments of the present application;

[0028] Figure 3 is Figure 1 the enlarged schematic view of A in FIG. 1;

[0029] Figure 4 is Figure 1 the enlarged schematic view of B in FIG. 1. DETAILED DESCRIPTION

[0030] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. Preferred embodiments of the application are shown in the drawings. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figures 1 to 4 As shown in the embodiment of this application, a high-efficiency and energy-saving tail evaporator is provided, which includes an evaporator housing 10, a first header 20, a second header 30, and several sets of evaporator tube assemblies 40, wherein:

[0032] Several sets of evaporator tube assemblies 40 are installed inside the evaporator housing 10. High-temperature flue gas is introduced into the evaporator housing 10. The first header 20 and the second header 30 are installed on the side wall of the evaporator housing 10. The two ends of the evaporator tube assembly 40 pass through the side wall of the evaporator housing 10 and are connected to the first header 20 and the second header 30 respectively. The second header 30 is located above the first header 20.

[0033] Each evaporator tube assembly 40 includes a first evaporator tube 41 and several second evaporator tubes 42. The first evaporator tube 41 is located above the second evaporator tubes 42. The first end of the first evaporator tube 41 is connected to the second header 30. The several first evaporator tubes 41 are arranged horizontally at intervals along the vertical direction. The lowest layer of second evaporator tubes 42 is connected to the first header 20. The ports of the first evaporator tubes 41 and the second evaporator tubes 42, as well as adjacent second evaporator tubes 42, are fixedly connected to each other for mutual communication. The first evaporator tubes 41 and the second evaporator tubes 42 are located along the first direction (…). Figure 1 In the same vertical plane (in the X direction) to form a pipe array;

[0034] Water enters the second evaporator 42 and the first evaporator 41 sequentially from the first header 20. The high-temperature flue gas comes into contact with the pipes to efficiently evaporate the water inside the pipes.

[0035] Specifically, the high-temperature flue gas enters the evaporator box 10 from top to bottom along the vertical direction to increase the residence time of the high-temperature flue gas in the evaporator box 10.

[0036] Through the cooperation of the evaporator box 10, the first header 20, the second header 30, and the plurality of groups of evaporating pipe assemblies 40, not only is the sufficient contact between the high-temperature flue gas and the evaporating pipe assemblies 40 ensured, and the heat exchange efficiency is improved, but also the structure is compact, and the space utilization in the evaporator box 10 is improved.

[0037] In an embodiment, the first evaporating pipe 41 is communicated with the second evaporating pipe 42 and the adjacent second evaporating pipe 42 through the U-shaped pipe 43.

[0038] By using the U-shaped pipe 43 for communication, a serpentine arrangement method of the evaporating pipe is provided, which not only makes the overall structure more compact, improves the space utilization, but also facilitates quick assembly.

[0039] In an embodiment, the first end of the first evaporating pipe 41 is higher than the second end of the evaporating pipe along the vertical direction, so as to tilt the first evaporating pipe 41.

[0040] By tilting the first evaporating pipe 41, the circulation efficiency of water is improved, the phenomenon of uneven steam-water separation is reduced, and the evaporation efficiency is improved.

[0041] In an embodiment, a plurality of pipe rows are arranged in the evaporator box 10 along the second direction, and the adjacent pipe rows are staggered.

[0042] By arranging a plurality of pipe rows in parallel along the second direction, the contact area between the flue gas and the evaporating pipe is further increased, and the heat exchange efficiency is improved.

[0043] In an embodiment, the reinforcing plates 11 are arranged outside the side plates of the evaporator box 10, the reinforcing plates 11 are fixedly connected between each other, and the reinforcing plates 11 are configured to enhance the structural strength of the evaporator box 10.

[0044] By arranging the reinforcing plates 11 fixedly connected to each other outside the evaporator box 10, the structural strength of the equipment is effectively improved, and the stability and safety of the equipment during operation are ensured.

[0045] In an embodiment, a plurality of groups of first fixing assemblies 12 are arranged side by side in the evaporator box 10 along the first direction, each group of first fixing assemblies 12 includes a support rod 120 and at least one fixing rod 121, the support rod 120 is located above the evaporating pipe assembly 40 and penetrates the evaporator box 10 along the second direction (Y direction), one end of the fixing rod 121 is fixedly connected with the support rod 120, the fixing rod 121 penetrates between the pipe rows along the vertical direction, and the fixing rod 121 is fixedly connected with the pipe rows. Figure 2 In an embodiment, the first evaporating pipe 41 is communicated with the second evaporating pipe 42 and the adjacent second evaporating pipe 42 through the U-shaped pipe 43.

[0046] Through the cooperation of the fixing rod 121 and the supporting rod 120, the stability of the tube row is improved, preventing the evaporation tube from loosening or displacement during operation, and improving the safety of the equipment operation.

[0047] In an embodiment, at least two support tables 110 are arranged on the reinforcing plate 11, and the first header 20 and the second header 30 are fixedly installed on the support tables 110 through the second fixing assembly 13.

[0048] The second fixing assembly 13 includes a U-shaped fixing piece 130 and a nut 131, and the support table 110 is provided with a mounting hole, the first header 20 is located in the middle of the U-shaped fixing piece 130, the U-shaped fixing piece 130 passes through the mounting hole at both ends, the U-shaped fixing piece 130 is provided with a thread 132 at both ends, the nut 131 is matched with the thread 132, and the nut 131 is tightened on one side of the support table 110 to fix the first header 20 on the other side of the support table 110.

[0049] Specifically, the fixing structure of the second header 30 is the same as that of the first header 20.

[0050] Through the cooperation of the support table 110, the U-shaped fixing 131 piece and the nut 132, not only the stable installation of the first header 20 and the second header 30 is realized, but also the structure is convenient to operate.

[0051] In an embodiment, the first evaporation tube 41 and the second evaporation tube 42 are arranged as finned tubes.

[0052] By arranging the first evaporation tube 41 and the second evaporation tube 42 as finned tubes, the contact area of the evaporation tube with high-temperature flue gas is increased, and the heat exchange efficiency is effectively improved.

[0053] In an embodiment, the outermost U-shaped tube 43 is provided with a flow guide plate 14 towards the upper end and the lower end of the evaporator box 10, respectively, and the flow guide plate 14 is configured to guide the flow of high-temperature flue gas, so that the high-temperature flue gas is concentrated towards the first evaporation tube 41 and the second evaporation tube 42.

[0054] Through the cooperation of the flow guide plates 14, the flow efficiency of the high-temperature flue gas is improved, the heat is concentrated to the surface of the evaporation tube, and at the same time, the leakage of the high-temperature flue gas through the connection between the evaporation tube and the evaporator box 10 is avoided, ensuring the safety and reliability of the equipment operation.

[0055] A boiler comprising the above-mentioned any one high-efficiency energy-saving tail evaporator.

[0056] The above examples are merely set forth to illustrate the basic principles and applications of the present application. It should be understood that the present application is not limited to these examples and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high efficiency, energy efficient tail evaporator characterized in that, The high-efficiency and energy-saving tail evaporator comprises an evaporator box, a first header, a second header and a plurality of groups of evaporating pipe assemblies, wherein: A plurality of groups of the evaporating pipe assemblies are installed in the evaporator box, high-temperature flue gas is introduced into the evaporator box, the first header and the second header are installed on the side wall of the evaporator box, the two ends of the evaporating pipe assembly pass through the side wall of the evaporator box and are in communication with the first header and the second header respectively, and the second header is located above the first header; Each group of the evaporating pipe assemblies comprises a first evaporating pipe and a plurality of second evaporating pipes, the first evaporating pipe is located above the second evaporating pipes, the first end of the first evaporating pipe is in communication with the second header, a plurality of the first evaporating pipes are arranged horizontally and spaced apart in the vertical direction, the lowermost second evaporating pipe is in communication with the first header, the first evaporating pipe and the second evaporating pipe and the adjacent second evaporating pipe are fixedly connected through ports to communicate with each other, and the first evaporating pipe and the second evaporating pipe are located in the same vertical plane in the first direction to form a pipe row. Water enters the second evaporating pipes and the first evaporating pipes from the first header in sequence, and the high-temperature flue gas contacts the pipe row to efficiently evaporate the water in the pipe.

2. The high-efficiency, energy-saving tail evaporator of claim 1, wherein, The first evaporating pipe and the second evaporating pipe and the adjacent second evaporating pipe are communicated through a U-shaped pipe.

3. The high-efficiency, energy-saving tail evaporator of claim 1, wherein, The first end of the first evaporating pipe is higher than the second end of the evaporating pipe in the vertical direction, so as to tilt the first evaporating pipe.

4. The high-efficiency, energy-saving tail evaporator of claim 1, wherein, A plurality of the pipe rows are arranged in the second direction in the evaporator box, and adjacent pipe rows are staggered.

5. The high-efficiency, low-energy tail evaporator of claim 1, wherein, A reinforcing plate is arranged outside the side plate of the evaporator box, the reinforcing plates are fixedly connected, and the reinforcing plates are configured to enhance the structural strength of the evaporator box.

6. The high-efficiency, low-energy tail evaporator of claim 4, wherein, A plurality of groups of first fixing assemblies are arranged side by side in the first direction on the evaporator box, each group of the first fixing assemblies comprises a support rod and at least one fixing rod, the support rod is located above the evaporating pipe assembly and penetrates through the evaporator box in the second direction, one end of the fixing rod is fixedly connected with the support rod, the fixing rod penetrates through the pipe rows in the vertical direction, and the fixing rod is fixedly connected with the pipe rows.

7. The high-efficiency, low-energy tail evaporator of claim 5, wherein, At least two support tables are arranged on the reinforcing plate, and the first header and the second header are fixedly installed on the support tables through second fixing assemblies. The second fixing assembly comprises a U-shaped fixing piece and a nut, a mounting hole is formed in the support table, the first header is located in the middle of the U-shaped fixing piece, the two ends of the U-shaped fixing piece penetrate through the mounting hole, the two ends of the U-shaped fixing piece are provided with threads, the nut is matched with the threads, and the nut is tightened on one side of the support table to fix the first header on the other side of the support table.

8. The high-efficiency, low-energy tail evaporator of claim 1, wherein, The first evaporating pipe and the second evaporating pipe are arranged as finned tubes.

9. The high-efficiency, energy-saving tail evaporator of claim 2, wherein, The outermost U-shaped pipes are respectively provided with guide plates towards the upper end and the lower end of the evaporator box, and the guide plates are configured to guide the flow of the high-temperature flue gas to concentrate the high-temperature flue gas towards the first evaporating pipe and the second evaporating pipe.

10. A boiler characterized by The boiler comprises the high-efficiency energy-saving tail evaporator as claimed in any one of claims 1-9.

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