Water cooling wall and boiler equipment
By setting the fluid flow direction angle θ in the water-cooled wall header, the problem of uneven mixing of the working fluid is solved, the temperature and pressure of the working fluid are made uniform, the boiler efficiency and stability are improved, and the manufacturing cost is reduced.
Patent Information
- Application Number
- CN202423295653.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing water-cooled wall solutions, uneven mixing of the working fluid within the header leads to uneven temperature distribution, affecting the heat load distribution of the water-cooled wall tubes, increasing manufacturing costs, and complicating the structure.
The design incorporates an angle θ (0° < θ ≤ 90°) between the flow direction of the fluid flowing into the mixing header through the first inlet and the flow direction of the fluid flowing into the mixing header through the second inlet. The second inlet pipe impacts the mainstream fluid, promoting mixing uniformity. A simple structural design is employed.
It improves the mixing uniformity of the working fluid in the mixing header, reduces local overheating or insufficient cooling, enhances boiler thermal efficiency and stability, reduces manufacturing costs, and facilitates maintenance.
Smart Images
Figure CN223740823U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a boiler equipment technical field, concretely relates to a water cooling wall and boiler equipment. BACKGROUND
[0002] In the water cooling wall system of a boiler, the header is an important component that connects the water cooling wall tubes. Its main function is to collect, distribute, and mix the working medium to ensure uniform cooling of the water cooling wall heating surface. However, due to the high flow rate of the working medium in the header, especially in large boilers, this high-speed flow can lead to insufficient mixing of the working medium in the header. When the working medium passes through the header at a high speed, due to the effect of inertial force, the working medium tends to flow along the main flow direction of the header, and it is difficult to fully diffuse to the entire space of the header. This flow characteristic not only leads to uneven temperature distribution in the header, but also can affect the heat load distribution of the water cooling wall tubes, thereby causing problems of local overheating or insufficient cooling. Therefore, how to improve the mixing uniformity of the working medium in the header has become one of the key problems to improve the efficiency of the boiler and prolong the service life of the water cooling wall.
[0003] The existing technology proposes various improvement measures, such as increasing the flow disturbing device in the header. However, the water cooling wall scheme with the flow disturbing device arranged in the header complicates the internal structure of the header, increases the processing difficulty of the header, and leads to the structure of the existing water cooling wall scheme being complex, thereby increasing the manufacturing cost and being not conducive to popularization and application. SUMMARY
[0004] The utility model aims at overcoming the shortage of prior art, provides a kind of water cooling wall and boiler equipment, solve the technical problem that the structure of existing water cooling wall scheme is complex and leads to increase manufacturing cost.
[0005] To achieve the above object, the utility model adopts the following technical scheme:
[0006] The utility model provides a kind of water cooling wall, including mixed header, first introduction pipe, second introduction pipe and lead-out pipe. The first inlet, the second inlet and the output interface are set on the mixed header, and the first inlet and the output interface are fixedly assembled on the two side walls oppositely arranged on the mixed header. The first introduction pipe is detachably connected to the first inlet, the lead-out pipe is detachably connected to the output interface, and the second introduction pipe is detachably connected to the second inlet. The flow direction of fluid flowing into the mixed header through the first inlet is the first direction, the flow direction of fluid flowing into the mixed header through the second inlet is the second direction, and the angle between the first direction and the second direction is θ ， θ is greater than 0 ° and less than or equal to 90 °.
[0007] Optionally, the θ is 90 °.
[0008] Optionally, the second introduction pipe comprises a first section, a bending section and a second section connected in sequence, and one end of the second section away from the bending section is connected with the second inlet.
[0009] Optionally, the second introduction pipe is arranged on both sides of the first introduction pipe.
[0010] Optionally, the first inlets, the second inlets and the output interface are configured as a plurality of, and the first introduction pipes, the second introduction pipes and the lead-out pipes are configured as a plurality of. The plurality of first inlets and the plurality of first introduction pipes are arranged in one-to-one correspondence, the plurality of second inlets and the plurality of second introduction pipes are arranged in one-to-one correspondence, and the output interface and the plurality of lead-out pipes are arranged in one-to-one correspondence.
[0011] Optionally, the plurality of first inlets, the plurality of second inlets or the plurality of output interfaces are arranged in an array.
[0012] The utility model also provides a boiler equipment, including above-mentioned water wall.
[0013] The utility model discloses beneficial effect lies in, compared with prior art, through introducing second introduction pipe and second inlet, and the flow direction of the flow of fluid that the fluid that designs through first inlet flows into mixed header and the flow direction of the flow of fluid that the fluid that designs through second inlet flows into mixed header exists angle θ, make the fluid that flows along the first direction will with the angle that is greater than 0 ° and less than or equal to 90 ° impact the fluid that flows along the second direction, effectively disturbed the flow field in mixed header, thereby significantly improve the mixing uniformity of working medium in mixed header. The promotion of working medium mixing uniformity helps to reduce the local overheating or cooling deficiency phenomenon of water wall heating surface, makes the heat load distribution of water wall more uniform, and then improves the overall thermal efficiency of boiler, prolongs the service life of water wall, strengthens the stability of boiler operation, also reduces the risk of safety accidents of boiler. Meanwhile, the water wall structure design proposed in the utility model is relatively simple, does not need to carry out complex structure transformation to header interior, reduces the manufacturing cost, and is convenient for subsequent maintenance and overhaul work, thereby solve the technical problem of increasing manufacturing cost caused by the complex structure of the existing water wall scheme. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the structure schematic diagram of the utility model.
[0015] In the drawing, 1 is first introduction pipe, 2 is second introduction pipe, 3 is mixed header, 4 is lead-out pipe. DETAILED DESCRIPTION
[0016] To solve the above technical problems, the utility model provides a kind of water-cooled wall and boiler equipment, present combining with the technical scheme and embodiment of the utility model of drawing are described in detail.
[0017] The working principle of the utility model is:
[0018] Part of the pipeline of water-cooled wall is bent and differentiated into several second introduction pipes near the mixing header, and the remaining pipeline, i.e., the first introduction pipe, continues to be connected to the intermediate mixing header in the original way, forming a multi-dimensional fluid inlet. When the working medium enters the mixing header through the first introduction pipe and the second introduction pipe, the flow field in the mixing header is effectively disturbed due to the included angle between the flow directions of the two. The fluid in the second introduction pipe impacts the main flow in the mixing header at a certain angle, promoting the mixing and diffusion of the fluid. The working medium that may originally flow along the main flow direction is effectively dispersed throughout the mixing header. After sufficient mixing inside the mixing header, the working medium is uniformly output to the water-cooled wall system of the boiler through the outlet pipe. Since the uniformity of the working medium has been significantly improved, the temperature and pressure of the working medium output by the outlet pipe are also more uniform.
[0019] The utility model will be described in detail below through specific embodiments, which are exemplary and intended to explain the utility model, and cannot be understood as a limitation on the utility model.
[0020] The utility model provides a kind of water-cooled wall, including mixing header, first introduction pipe, second introduction pipe and outlet pipe. The first inlet, second inlet and output interface are opened on the mixing header, and the first inlet and the output interface are fixedly assembled on the two side walls of the mixing header. The first introduction pipe is detachably connected to the first inlet, the outlet pipe is detachably connected to the output interface, and the second introduction pipe is detachably connected to the second inlet. The flow direction of fluid flowing into the mixing header through the first inlet is the first direction, and the flow direction of fluid flowing into the mixing header through the second inlet is the second direction, and the angle between the first direction and the second direction is θ ， θ is greater than 0 ° and less than or equal to 90 °.
[0021] By introducing the second introduction pipe and the second inlet, and designing the flow direction of the fluid flowing into the mixing header through the first inlet and the flow direction of the fluid flowing into the mixing header through the second inlet to have an included angle θ, the fluid flowing in the first direction can impact the fluid flowing in the second direction at an angle greater than 0° and less than or equal to 90°, effectively disturbing the flow field in the mixing header, thereby significantly improving the mixing uniformity of the working medium in the mixing header. The improvement of the mixing uniformity of the working medium helps to reduce the local overheating or insufficient cooling phenomenon of the water-cooled wall heating surface, makes the heat load distribution of the water-cooled wall more uniform, and further improves the overall thermal efficiency of the boiler, prolongs the service life of the water-cooled wall, enhances the stability of the boiler operation, and also reduces the risk of safety accidents of the boiler. At the same time, the water-cooled wall structure design provided by the utility model is relatively simple, does not need to make complex structural modification to the header, reduces the manufacturing cost, and is convenient for subsequent maintenance and repair work, thereby solving the technical problem of the existing water-cooled wall scheme that the complex structure increases the manufacturing cost.
[0022] The following will be described in detail Figure 1 A practical water-cooled wall scheme is provided:
[0023] Reference Figure 1 The water-cooled wall intermediate mixing header structure for enhancing the mixing uniformity of working medium provided by the utility model comprises a first introduction pipe 1, a second introduction pipe 2, a mixing header 3 and an outlet pipe 4.
[0024] The first introduction pipe 1 is connected with the lower part of the cylindrical surface of the mixing header 3 through welding, the second introduction pipe 2 is connected with the two side planes of the mixing header 3 in a perpendicular manner through welding, and the outlet pipe 4 is connected with the upper part of the cylindrical surface of the mixing header 3 through welding.
[0025] The welding connection mode can improve the connection stability and sealing performance of different parts of the mixing header 3, so that the mixing header 3 as a whole has good mechanical properties and sealing performance, thereby enabling the mixing header 3 to adapt to different working conditions and maintain good working stability.
[0026] The partial pipes on both sides of the lower water-cooled wall are bent and differentiated into a plurality of second introduction pipes 2 near the mixing header 3, and the remaining pipes, i.e. the first introduction pipes 1, continue to be connected to the intermediate mixing header 3 in the original manner.
[0027] This setting mode enables the working medium injected along the second introduction pipe 2 to interfere with the flow direction of the working medium injected along the first introduction pipe 1, so that the working medium in the mixing header 3 can be dispersed to all parts of the mixing header 3, thereby improving the mixing uniformity of the working medium and making the temperature of each part of the mixing header 3 more uniform, and further making the temperature and pressure of the working medium output by the outlet pipe 4 more uniform, so as to improve the cooling effect of the water-cooled wall.
[0028] The angle of the working medium in the first introduction pipe 1 and the second introduction pipe 2 into the mixing header 3 is 90°.
[0029] Only considering the size of the angle, when the angle is 90°, that is, the angle between the first direction and the second direction is a right angle, the interference effect of the working medium injected along the second introduction pipe 2 on the flow direction of the working medium injected along the first introduction pipe 1 is the strongest, and the working medium can be more effectively dispersed to each part of the mixing header 3.
[0030] The proportion of the number of pipes of the first introduction pipe 1 and the second introduction pipe 2 can be flexibly adjusted according to the size of the mixing header 3.
[0031] The proportion of the number of pipes of the first introduction pipe 1 and the second introduction pipe 2 can be adjusted to adapt to the mixing header 3 with different sizes in the first direction and the second direction, so as to enhance the applicability of the water cooling wall under different working conditions.
[0032] The above only describes the preferred embodiments of the present application, and the above specific embodiments are not a limitation of the present application. Within the technical concept of the present application, various modifications and changes can occur, and any modification, change or equivalent replacement made by those skilled in the art according to the above description shall fall within the scope of the present application.
Claims
1. A water cooled wall characterized by, The mixed header, the first introduction pipe, the second introduction pipe and the outlet pipe are included. The first inlet port, the second inlet port and the output port are arranged on the mixed header, and the first inlet port and the output port are fixedly assembled on the two opposite sidewalls of the mixed header. The first introduction pipe is detachably connected to the first inlet port, the outlet pipe is detachably connected to the output port, and the second introduction pipe is detachably connected to the second inlet port. The flow direction of fluid flowing into the mixing header through the first inlet port is a first direction, the flow direction of fluid flowing into the mixing header through the second inlet port is a second direction, and the angle between the first direction and the second direction is θ ， θ is greater than 0° and less than or equal to 90°.
2. The water cooled wall of claim 1 wherein, The θ is 90°.
3. The water cooled wall of claim 1 wherein, The second introduction pipe comprises a first section, a bending section and a second section connected in sequence, and one end of the second section away from the bending section is connected to the second inlet port.
4. The water cooled wall of claim 1 wherein, The second introduction pipe is arranged on both sides of the first introduction pipe.
5. The water cooled wall of claim 1 wherein, The first inlet port, the second inlet port and the output port are configured as multiple, and the first introduction pipe, the second introduction pipe and the outlet pipe are configured as multiple. Multiple first inlet ports are arranged in one-to-one correspondence with multiple first introduction pipes, multiple second inlet ports are arranged in one-to-one correspondence with multiple second introduction pipes, and the output port is arranged in one-to-one correspondence with multiple outlet pipes.
6. The water cooled wall of claim 5 wherein, Multiple first inlet ports, multiple second inlet ports or multiple output ports are arranged in an array.
7. A boiler apparatus, characterized by, The water-cooled wall comprises any one of claims 1-6.