Boiler system
Through the light tube economizer and deflector structure, the manufacturing complexity and ash accumulation problems of fin economizer are solved, the flue gas flowability and heat transfer efficiency are improved, and the safe operation cycle of the boiler is extended.
Patent Information
- Application Number
- CN202422587265.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-24
AI Technical Summary
In the existing boiler system, the fin economizer is complex and costly, and is prone to accumulation of dust and dirt, resulting in thermal stress damage, poor flue gas circulation and low heat transfer efficiency.
The light-tube economizer and deflector structure is adopted, including inclined deflectors and continuous light-tube pipes, combined with steam soot blowing holes, optimizes the flow direction of the flue gas and reduces ash accumulation.
It reduces manufacturing complexity and cost, solves the problems of ash accumulation and scale, improves flue gas flowability and heat transfer efficiency, and extends the safe operation cycle of the boiler.
Smart Images
Figure CN223294807U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat boilers, in particular to a boiler system. Background Art
[0002] Currently, boiler economizers are primarily used in the thermal power generation industry. The fin-shaped economizers used are complex and costly to manufacture, and they are prone to dust and dirt accumulation in the flue gas, increasing maintenance and cleaning frequency. Furthermore, the temperature gradient between the fins and the tube wall creates significant thermal stress, which can easily damage or crack the connection between the fins and the base tube, shortening the equipment's service life. The small gaps between the fins can lead to poor flue gas flow or even blockage under harsh operating conditions, reducing heat transfer efficiency and increasing operating pressure losses. Therefore, a new boiler economizer system is urgently needed. Utility Model Content
[0003] In order to solve the above technical problems, the utility model provides a boiler system with a bare tube economizer and a guide plate, which is used to solve the technical problems that traditional fin-shaped economizers are prone to dirt accumulation and poor flue gas circulation.
[0004] The technical solution of the utility model is: a boiler system with a bare tube economizer and a guide plate, comprising:
[0005] An SCR flue 1 for flue gas flow is provided, and a high-temperature air preheater 2 is located at the outlet of the original flue gas. A flue baffle 3 is provided below the high-temperature air preheater 2. The flue baffle 3 is placed at an angle, and a denitrification reactor 4 is provided on the right side of the flue baffle 3. A plurality of inclined guide plates are also provided at the outlet of the SCR flue 1, and a light tube economizer 5 is provided downstream of the plurality of inclined guide plates.
[0006] Furthermore, the inclination angle of the flue baffle 3 is 45°.
[0007] Furthermore, several guide plates with different inclination angles are arranged at the SCR flue outlet, and the guide plates with different inclination angles include guide plate A61, guide plate B62, and guide plate C63. The inclination angle of guide plate A61 is 55° with the vertical direction, the inclination angle of guide plate B62 is 40° with the vertical direction, and the inclination angle of guide plate C63 is 25° with the vertical direction.
[0008] Furthermore, the length of the guide plate A61 is 1900-2200 mm, the length of the guide plate B62 is 1400-1800 mm, and the length of the guide plate C63 is 1400-1800 mm.
[0009] Furthermore, the length of the guide plate A61 is 2000 mm, the length of the guide plate B62 is 1600 mm, and the length of the guide plate C63 is 1600 mm.
[0010] Furthermore, a bare tube economizer 5 comprises: a supporting box body 51, in which a symmetrically distributed left economizer header and a right economizer header are arranged, the left economizer header and the right economizer header are arranged through, an inlet 52 is provided at the bottom of the left economizer header and the right economizer header, and an outlet 53 is provided at the top, and parallel continuous bare tube type pipes 54 arranged in a serpentine shape are provided between the inlet 52 and the outlet 53, and a plurality of connecting columns 55 are fixedly connected to the continuous bare tube type pipes 54, and a plurality of steam soot blowing holes 56 are also provided in the left economizer header and the right economizer header.
[0011] Furthermore, two anti-wear meshes 57 are added to the continuous smooth tube pipe 54 of each economizer header.
[0012] Furthermore, six steam soot blowing holes 56 are provided in the left economizer header and the right economizer header.
[0013] The beneficial technical effects of the utility model are:
[0014] 1. The manufacturing complexity and high cost of traditional fin structures have been solved, and the manufacturing cost of light tube type has been significantly reduced.
[0015] 2. Solved the dust accumulation and scaling problems. The light tube structure and increased number of soot blowing ports completely solved the problem of dirt accumulation.
[0016] 3. The three-angle guide plate is replaced at the outlet of the SCR flue to solve the problems of single airflow and uneven internal airflow dispersion. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the boiler system structure with a bare tube economizer and guide plates;
[0018] Figure 2 It is a schematic diagram of the structure of a bare tube economizer;
[0019] In the figure,
[0020] 1. SCR flue; 2. High-temperature air preheater; 3. Flue baffle; 4. Desulfurization reactor; 5. Bare-tube economizer; 51. Support box; 52. Inlet; 53. Outlet; 54. Bare-tube pipeline; 55. Connecting column; 56. Steam soot blowing hole; 57. Anti-wear mesh; 61. Guide plate A; 62. Guide plate B; 63. Guide plate C. DETAILED DESCRIPTION
[0021] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.
[0022] See also Figure 1-2 This embodiment discloses a boiler system with a bare tube economizer and a guide plate, comprising:
[0023] An SCR flue 1 for flue gas flow is provided, and a high-temperature air preheater 2 is located at the outlet of the original flue gas. A flue baffle 3 is provided below the high-temperature air preheater 2. The flue baffle 3 is placed at an angle, and a denitrification reactor 4 is provided on the right side of the flue baffle 3. A plurality of inclined guide plates are also provided at the outlet of the SCR flue 1, and a light tube economizer 5 is provided downstream of the plurality of inclined guide plates.
[0024] In this specific embodiment, the flue gas discharged from the high-temperature air preheater 1 is guided by the flue baffle 3 and enters the denitrification reactor 4. After the flue gas is denitrified in the denitrification reactor 4, it flows through the SCR flue 1 to the outlet of the SCR flue. The outlet of the SCR flue is provided with multiple guide plates with different inclination angles, so that the denitrified flue gas enters the light tube economizer 5 along the multiple guide plates with different inclination angles. The multiple guide plates with different inclination angles can avoid poor flue gas circulation or blockage.
[0025] More specifically, the inclination angle of the flue baffle 3 is 45°. By setting the inclination angle of the baffle 3 to 45°, the flue gas discharged from the high-temperature air preheater 2 can be reversed to flow to the denitrification reactor 4 to adapt to the flue gas flow direction of the SCR flue.
[0026] More specifically, several guide plates with different inclination angles are arranged at the SCR flue outlet, including guide plate A61, guide plate B62, and guide plate C63. The inclination angle of guide plate A61 is 55° to the vertical direction, the inclination angle of guide plate B62 is 40° to the vertical direction, and the inclination angle of guide plate C63 is 25° to the vertical direction. Figure 1 The three-angled deflector A61, B62, and C63 shown replace the original single-angle 45° deflector, resolving the problems of uneven flue gas flow, blockage, reduced heat transfer efficiency, and increased operating pressure loss caused by the single 45° deflector. In this specific embodiment, the three-angled deflectors A61, B62, and C63 optimize flue gas flow, ensuring uniform flow and smooth flue gas flow while increasing heat transfer efficiency.
[0027] More specifically, the length of guide plate A61 is 1900-2200 mm, the length of guide plate B62 is 1400-1800 mm, and the length of guide plate C63 is 1400-1800 mm. Preferably, the length of guide plate A61 is 2000 mm, the length of guide plate B62 is 1600 mm, and the length of guide plate C63 is 1600 mm. The specific lengths of guide plates A61, B62, and C63 are selected to suit their respective inclination angles to achieve optimal flue gas flow.
[0028] The utility model also discloses a bare tube economizer 5, comprising: a supporting box body 51, wherein a left economizer header and a right economizer header are symmetrically arranged, the left economizer header and the right economizer header are through-arranged, an inlet 52 is provided at the bottom of the left economizer header and the right economizer header, an outlet 53 is provided at the top, a continuous bare tube type pipe 54 arranged in parallel in a serpentine shape is provided between the inlet 52 and the outlet 53, a plurality of connecting columns 55 are fixedly connected to the continuous bare tube type pipe 54, and a plurality of steam soot blowing holes 56 are also provided in the left economizer header and the right economizer header.
[0029] In this specific embodiment, the existing economizer structure was modified. Operational data was collected to understand the performance bottlenecks and efficiency losses of the current economizer. The upgrade objectives were clarified, and the original fin-type economizer was converted to a bare tube type. By converting the economizer piping from the original fin-type to a bare tube type, the redundant structure of the existing fin-type economizer was simplified, reducing blockages caused by dust accumulation. To further reduce dust accumulation, several steam soot blowing holes were installed to reduce dust accumulation and accelerate heat dissipation.
[0030] More specifically, two anti-wear screens 57 are added to the continuous smooth tube pipes 54 of each economizer header to increase the continuous safe operation cycle of the boiler. In this specific embodiment, the anti-wear screens are added to reduce the risk of economizer leakage and increase the continuous safe operation cycle of the boiler.
[0031] More specifically, six steam soot blowing holes 56 are provided in the left economizer header and the right economizer header, two of which are located on one side of the left economizer header, two are located on one side of the right economizer header, and two are located in the middle of the left economizer header and the right economizer header.
[0032] Compared with the existing technology, the utility model has been improved and innovated, achieving improved efficiency, optimizing flue gas flow direction, adding anti-wear mesh, reducing economizer leakage, improving boiler continuous operation, reducing energy consumption, and improving boiler load capacity.
Claims
1. A boiler system with a bare tube economizer and a guide plate, characterized in that: include: An SCR flue (1) for flue gas flow, a high-temperature air preheater (2) located at the outlet of the original flue gas, a flue baffle (3) arranged below the high-temperature air preheater (2), the flue baffle (3) being tilted, a denitrification reactor (4) being arranged on the right side of the flue baffle (3), a plurality of tilted guide plates being further arranged at the outlet of the SCR flue (1), and a light tube economizer (5) being arranged downstream of the plurality of tilted guide plates.
2. A boiler system according to claim 1, characterized in that: A plurality of guide plates with different inclination angles are arranged at the SCR flue outlet, wherein the guide plates with different inclination angles include a guide plate A (61), a guide plate B (62), and a guide plate C (63). The guide plate A (61) has an inclination angle of 55° with respect to the vertical direction, the guide plate B (62) has an inclination angle of 40° with respect to the vertical direction, and the guide plate C (63) has an inclination angle of 25° with respect to the vertical direction.
3. The boiler system according to claim 1, characterized in that: The inclination angle of the flue baffle (3) is 45°.
4. A boiler system according to claim 2, characterized in that: The length of the guide plate A (61) is 1900-2200 mm, the length of the guide plate B (62) is 1400-1800 mm, and the length of the guide plate C (63) is 1400-1800 mm.
5. A boiler system according to claim 4, characterized in that: The length of the guide plate A (61) is 2000 mm, the length of the guide plate B (62) is 1600 mm, and the length of the guide plate C (63) is 1600 mm.
6. The boiler system according to claim 1, characterized in that: The light tube economizer (5) comprises: a supporting box (51), wherein a left economizer header and a right economizer header are symmetrically arranged in the supporting box (51), the left economizer header and the right economizer header are connected, an inlet (52) is provided at the bottom of the left economizer header and the right economizer header, and an outlet (53) is provided at the top, and a continuous light tube type pipeline (54) arranged in parallel in a serpentine shape is provided between the inlet (52) and the outlet (53), and a plurality of connecting columns (55) are fixedly connected to the continuous light tube type pipeline (54), and a plurality of steam soot blowing holes (56) are also provided in the left economizer header and the right economizer header.
7. A boiler system according to claim 6, characterized in that: Two anti-wear nets (57) are added to the continuous smooth tube type pipeline (54) of each group of economizer headers.
8. The boiler system according to claim 6, characterized in that: Six steam soot blowing holes (56) are provided in the left economizer header and the right economizer header.