Front evaporator for boiler

Abstract

The utility model provides a front evaporator for a boiler, which comprises an evaporator box body and an evaporation module, the evaporation module fixedly penetrates through the evaporator box body, high-temperature flue gas is introduced into the evaporator box body, the evaporation module comprises a first header, a second header and a plurality of evaporation pipes, the first collecting box and the second collecting box are fixedly installed on the two corresponding side faces of the evaporator box body, a plurality of water outlets are formed in the first collecting box, a plurality of water inlets are formed in the second collecting box, and the two ends of each evaporation pipe penetrate through the evaporator box body and communicate with the first collecting box and the second collecting box correspondingly; the first collecting box is higher than the second collecting box, water enters the second collecting box through the water inlet and enters the first collecting box through the multiple evaporation pipes, and high-temperature smoke makes contact with the evaporation pipes in the evaporator box so as to heat and evaporate water in the pipes. Through the design of the evaporation module and the cooperation of the evaporation module and the evaporator box body, the integrated front evaporator is provided, the structure is simple, and rapid installation and connection are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field especially relates to a front evaporator for boiler. BACKGROUND

[0002] As an important equipment of energy utilization, boilers are widely used in power, chemical industry, metallurgy and other industries. In the heat exchange system of the boiler, the front evaporator as a key component directly affects the thermal efficiency and energy utilization rate of the boiler.

[0003] In the traditional design, when high-temperature flue gas flows through the front evaporator, due to the limitation of pipeline arrangement and fluid flow direction, the high heat energy in the flue gas cannot be fully utilized, resulting in low heat exchange efficiency. In addition, the structure of the front evaporator is usually large and complex, occupying a large installation space, making the overall design of the boiler complex and not compact enough, not only difficult to adapt to the boiler system with high requirements for energy saving and space utilization, but also increasing the assembly difficulty. SUMMARY

[0004] The purpose of the present application is to provide a front evaporator for boiler to solve the problem of complex structure of the front evaporator of the boiler in the prior art.

[0005] To achieve this purpose, the following technical solutions are adopted:

[0006] The present application provides a front evaporator for boiler, which comprises an evaporator box and an evaporation module, wherein:

[0007] The evaporation module is fixedly penetrated in the evaporator box, high-temperature flue gas is introduced into the evaporator box, and the evaporation module is configured to transfer the heat of the high-temperature flue gas to the water in the evaporation module to heat it into steam;

[0008] The evaporation module comprises a first header tank, a second header tank and a plurality of evaporation pipes, the first header tank and the second header tank are fixedly installed on the corresponding two sides of the evaporator box, a plurality of water outlets are formed on the first header tank, a plurality of water inlets are formed on the second header tank, and the two ends of the plurality of evaporation pipes penetrate the evaporator box and are respectively connected to the first header tank and the second header tank;

[0009] The height of the first header tank is higher than that of the second header tank, water enters the second header tank through the water inlet, enters the first header tank through the plurality of evaporation pipes, and the high-temperature flue gas contacts the evaporation pipes in the evaporator box to heat and evaporate the water in the pipes.

[0010] Optionally, the plurality of evaporation pipes are inclined along a first direction and located in the same vertical plane to form a pipe row, and the first header tank and the second header tank are connected to a plurality of groups of pipe rows along a second direction.

[0011] Optionally, a plurality of connecting blocks are arranged on the pipe row, and the connecting blocks are welded to connect the adjacent evaporation pipes in the vertical direction.

[0012] Optionally, a mounting seat is fixedly arranged above the first header tank, the mounting seat is fixedly installed on the evaporator box, and the first header tank is fixedly installed on the mounting seat through a plurality of groups of fixing assemblies arranged in the second direction.

[0013] Optionally, each group of fixing assemblies comprises a U-shaped piece and two nuts, two mounting holes are formed in the mounting seat, the first header tank is inserted into the U-shaped piece, threaded segments are arranged at two ends of the U-shaped piece, and the first header tank is fixed by screwing the U-shaped piece at the two ends through the mounting holes and onto the mounting seat by the nuts.

[0014] Optionally, a sealing cover is arranged outside the evaporator box, the evaporation pipes pass through the sealing cover, and flexible pads are arranged at the connection between the evaporation pipes and the sealing cover, and the flexible pads are sleeved on the evaporation pipes.

[0015] Optionally, the high-temperature flue gas enters the evaporator box from top to bottom in the vertical direction.

[0016] Compared with the prior art, the front evaporator for the boiler provided in the application has the following advantages:

[0017] 1) Through the design of the evaporation module and the cooperation of the evaporation module with the evaporator box, the heat of the high-temperature flue gas is efficiently transferred to water, and the heat exchange efficiency is effectively improved; at the same time, the structure of the front evaporator is simplified, the equipment volume is reduced, and installation and maintenance are facilitated.

[0018] 2) Through the welding connection of the connecting blocks, the connection strength between the evaporation pipes is strengthened, the overall stability of the pipe row is ensured, the inclination angles of the evaporation pipes are ensured to be consistent, and the separation efficiency and uniformity of steam and water are ensured.

[0019] 3) Through the cooperation of the flexible pads and the sealing cover, leakage of the high-temperature flue gas is effectively avoided, the safety and thermal efficiency of the overall operation of the evaporator are enhanced, and energy waste is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate and understand the technical solutions in the embodiments of the application, the drawings needed to be used in the background and embodiment descriptions of the application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the application and the drawings.

[0021] Figure 1 is a front view cross-sectional view of the front evaporator for the boiler provided by the embodiments of the application;

[0022] Figure 2 is a front view of the evaporator provided by the embodiment of the present application;

[0023] Figure 3 is Figure 1 is an enlarged schematic view of A in FIG. 1;

[0024] Figure 4 is Figure 1 is an enlarged schematic view of B in FIG. 1. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a mediating component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a mediating component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] Referring to Figures 1 to 4 shown, the front evaporator for a boiler provided by the embodiment of the present application includes an evaporator box 10 and an evaporating module 20, wherein:

[0027] The evaporating module 20 is fixedly penetrated in the evaporator box 10, high-temperature flue gas is introduced into the evaporator box 10, and the evaporating module 20 is configured to transmit the heat of the high-temperature flue gas to water in the evaporating module 20 to heat the water into steam;

[0028] The evaporating module 20 includes a first header 21, a second header 22 and a plurality of evaporating pipes 23, the first header 21 and the second header 22 are fixedly installed on the corresponding two side surfaces of the evaporator box 10, a plurality of water outlets 210 are formed on the first header 21, a plurality of water inlets 220 are formed on the second header 22, and two ends of the plurality of evaporating pipes 23 penetrate the evaporator box 10 and are respectively communicated with the first header 21 and the second header 22;

[0029] The height of the first header 21 is higher than that of the second header 22. Water enters the second header 22 through the inlet 220, passes through several evaporation pipes 23 and enters the first header 21. The high-temperature flue gas comes into contact with the evaporation pipes 23 inside the evaporator housing 10 to heat the water inside the pipes and thus evaporate it.

[0030] Through the design of the evaporation module 20 and its cooperation with the evaporator housing 10, the heat of the high-temperature flue gas is efficiently transferred to the water, effectively improving the heat exchange efficiency; at the same time, the structure of the front evaporator is simplified, the equipment volume is reduced, and installation and maintenance are facilitated.

[0031] In one embodiment, multiple evaporation tubes 23 are arranged along a first direction ( Figure 1 The first header 21 and the second header 22 are inclined in the second direction (X direction) and located in the same vertical plane to form a pipe bank, and are located in the same vertical plane to form a pipe bank. Figure 2 There are several sets of pipes connected in the Y direction.

[0032] By arranging multiple evaporator tubes 23 and distributing multiple sets of tubes, the structure is not only compact and space utilization is improved, but modular installation is also facilitated, enhancing assembly flexibility. On the other hand, the high-temperature flue gas is made to contact the evaporator tubes 23 more evenly, further improving heat exchange efficiency.

[0033] In one embodiment, a plurality of connecting blocks 24 are provided on the tube bank, and the connecting blocks 24 are welded to the evaporation tubes 23 adjacent in the vertical direction.

[0034] The welding connection of the connecting block 24 not only strengthens the connection strength between the evaporation tubes 23 and ensures the overall stability of the tube bank, but also ensures that the tilt angle of the evaporation tubes 23 is consistent, thus guaranteeing the efficiency and uniformity of steam and water separation.

[0035] In one embodiment, a mounting base 25 is fixedly disposed above the first header 21, and the mounting base 25 is fixedly mounted on the evaporator housing 10. The first header 21 is fixedly mounted on the mounting base 25 by a plurality of sets of fixing components 26 arranged along the second direction.

[0036] Specifically, the first container 21 and the second container 22 are fixed in the same way.

[0037] The cooperation between the mounting base 25 and the fixing component 26 enhances the structural stability of the header, ensuring the stability and safety of the evaporator during operation.

[0038] In an embodiment, each fixed assembly 26 includes a U-shaped piece 260 and two nuts 261, and two mounting holes are formed on the mounting seat 25, the first header 21 is inserted into the U-shaped piece 260, threaded segments 262 are arranged at both ends of the U-shaped piece 260, and the U-shaped piece 260 is fastened on the threaded segments 262 by the nuts 261 after passing through the mounting holes to fix the first header 21.

[0039] Specifically, the nuts 261 are matched with the threaded segments 262.

[0040] The U-shaped piece 260 and the nuts 261 provide a simple and efficient fixing method for the header, and improve the assembly efficiency of the header.

[0041] In an embodiment, the evaporator box 10 is provided with a sealing cover 11, the evaporation pipe 23 passes through the sealing cover 11, and the flexible pad 12 is arranged at the connection between the evaporation pipe 23 and the sealing cover 11, and the flexible pad 12 is sleeved on the evaporation pipe 23.

[0042] The flexible pad 12 and the sealing cover 11 effectively prevent the leakage of high-temperature flue gas, enhance the safety and thermal efficiency of the whole evaporator, and avoid energy waste.

[0043] In an embodiment, the high-temperature flue gas enters the evaporator box 10 from top to bottom along the vertical direction.

[0044] The design of the high-temperature flue gas flowing from top to bottom can increase the residence time of the high-temperature flue gas in the evaporator box 10, realize efficient heat transfer, and reduce energy waste.

[0045] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited to the above examples. Various changes and modifications can be made without departing from the spirit and scope of the present application, and these changes and modifications fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A front evaporator for a boiler, characterized in that The front evaporator for the boiler comprises an evaporator box and an evaporating module, wherein: The evaporating module is fixedly penetrated in the evaporator box, high-temperature flue gas is introduced into the evaporator box, and the evaporating module is configured to transfer heat of the high-temperature flue gas to water in the evaporating module to heat the water into steam; The evaporating module comprises a first header tank, a second header tank and a plurality of evaporating pipes, the first header tank and the second header tank are fixedly installed on corresponding two side surfaces of the evaporator box, a plurality of water outlets are formed in the first header tank, a plurality of water inlets are formed in the second header tank, and two ends of the plurality of evaporating pipes are penetrated through the evaporator box and respectively communicated with the first header tank and the second header tank; The first header tank is higher than the second header tank, water enters the second header tank through the water inlets, enters the first header tank through the plurality of evaporating pipes, and the high-temperature flue gas contacts the evaporating pipes in the evaporator box to heat and evaporate the water in the pipes.

2. A front evaporator for a boiler according to claim 1, characterized in that The plurality of evaporating pipes are inclined along a first direction and located in a same vertical plane to form a pipe row, and the first header tank and the second header tank are communicated with a plurality of groups of pipe rows along a second direction.

3. A front evaporator for a boiler according to claim 2, characterized in that A plurality of connecting blocks are arranged on the pipe row, and the connecting blocks are welded to connect the adjacent evaporating pipes in the vertical direction.

4. A front evaporator for a boiler according to claim 2, characterized in that An installation seat is fixedly arranged above the first header tank, the installation seat is fixedly installed on the evaporator box, and the first header tank is fixedly installed on the installation seat through a plurality of groups of fixing assemblies arranged along the second direction.

5. A front evaporator for a boiler according to claim 4, characterized in that Each group of fixing assemblies comprises a U-shaped piece and two nuts, two installation holes are formed in the installation seat, the first header tank is inserted in the U-shaped piece, threaded segments are arranged at two ends of the U-shaped piece, the U-shaped piece is screwed on the installation seat by the nuts after penetrating through the installation holes to fix the first header tank.

6. The front evaporator for a boiler according to claim 1, characterized in that, A sealing cover is arranged outside the evaporator box, the evaporating pipes are arranged through the sealing cover, and flexible pads are arranged at positions where the evaporating pipes are connected to the sealing cover.

7. A front evaporator for a boiler according to claim 1, characterized in that The high-temperature flue gas enters the evaporator box from top to bottom along the vertical direction.

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