Low temperature economizer for circulating fluidized bed boiler

Abstract

The utility model relates to the field of economizers, and in particular to a low-temperature economizer for a circulating fluidized bed boiler. The low-temperature economizer for a circulating fluidized bed boiler comprises a low-temperature economizer, a J-shaped slide plate, a reciprocating structure and an impact device, a cleaning plate that can be reciprocated is installed inside the low-temperature economizer, and a slide groove is provided inside the low-temperature economizer, the J-shaped slide plate is slidably connected to the outer wall of the low-temperature economizer, and an impact bar is installed at one end of the J-shaped slide plate, the top of the cleaning plate is located directly below the impact bar and is fixedly connected with a block, the reciprocating structure is installed in the slide groove inside the low-temperature economizer, and is installed in conjunction with the cleaning plate, and an impact device is installed on the outside of the low-temperature economizer and is installed in conjunction with the J-shaped slide plate. The utility model can continuously clean the inside of the low-temperature economizer without stopping the machine through the automatically reciprocating cleaning plate, effectively removing accumulated dust and impurities, thereby significantly improving the cleaning efficiency and reducing manual intervention and downtime.

Description

Technical Field

[0001] The utility model relates to the field of economizers, in particular to a low-temperature economizer for a circulating fluidized bed boiler. Background Art

[0002] In the circulating fluidized bed boiler system, the low-temperature economizer is an important energy-saving device. Its main function is to preheat the feed water by recovering the heat in the flue gas, thereby improving the thermal efficiency of the entire system. However, since the flue gas contains a large amount of dust and impurities, these substances will inevitably deposit on the inner wall of the low-temperature economizer to form ash when flowing through it.

[0003] Traditional low-temperature economizer designs often ignore the problem of ash cleaning, which results in the continuous increase of ash accumulation during actual operation, which not only reduces heat exchange efficiency and increases energy consumption, but also the long-term accumulation of dust may clog the pipeline and affect the normal operation of the boiler. Therefore, how to effectively clean the ash inside the low-temperature economizer has become an urgent problem to be solved.

[0004] At present, the cleaning of ash accumulation inside low-temperature economizers mainly relies on manual cleaning or simple mechanical cleaning methods; however, these methods have many inconveniences; first, manual cleaning requires shutdown and disassembly, which is not only time-consuming and labor-intensive, but also difficult to ensure the cleaning effect; secondly, although simple mechanical cleaning methods can reduce downtime to a certain extent, due to limited cleaning strength, it is often difficult to completely remove the ash accumulation; in addition, these cleaning methods also have safety risks, which may cause damage to equipment or harm to personnel.

[0005] Therefore, it is necessary to provide a new low-temperature economizer for a circulating fluidized bed boiler to solve the above technical problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a low-temperature economizer for a circulating fluidized bed boiler.

[0007] The utility model provides a low-temperature economizer for a circulating fluidized bed boiler, comprising: a low-temperature economizer, a J-shaped slide, a reciprocating structure and an impact device. A reciprocating cleaning plate is installed inside the low-temperature economizer, and a slide groove is provided inside the low-temperature economizer. The J-shaped slide is slidably connected to the outer wall of the low-temperature economizer, and an impact bar is installed at one end of one side of the J-shaped slide. The top of the cleaning plate is located directly below the impact bar and is fixedly connected with a stopper. The reciprocating structure is installed in the slide groove inside the low-temperature economizer and is installed in coordination with the cleaning plate. The impact device is installed on the outside of the low-temperature economizer and is installed in coordination with the J-shaped slide.

[0008] Preferably, the reciprocating structure includes: a reciprocating screw, a driving source fixedly connected to the outer wall of the low-temperature economizer, a reciprocating screw rotatably connected to the inner wall of the slide groove, the driving end output end is fixedly connected to the reciprocating screw, one side of the cleaning plate is fixedly connected to a reciprocating slider, the reciprocating slider is installed in cooperation with the reciprocating screw, and the reciprocating slider is slidably connected to the slide groove.

[0009] Preferably, the impact device includes: a driving bevel gear, one end of the reciprocating screw rod extends out of the low-temperature economizer and is fixedly connected to the driving bevel gear, the outer wall of the low-temperature economizer is rotatably connected to the driven bevel gear, the driving bevel gear is meshingly connected to the driven bevel gear, a shift block is fixedly connected to the outer side of the driven bevel gear away from the center of the circle, a shift groove is provided on one side of the J-shaped slide, the shift groove is slidably connected to the shift block, one end of the J-shaped slide is equidistantly fixedly connected to a buffer spring, and a plurality of buffer springs are fixedly connected to the back of the impact bar.

[0010] Preferably, the length of the shifting groove is the same as the diameter of the driven bevel gear.

[0011] Preferably, a sliding bar is fixedly connected to the outer side of the low-temperature economizer, and the sliding bar is slidably connected to the J-shaped sliding plate.

[0012] Preferably, the inner wall of the chute of the low-temperature economizer is provided with a wear-resistant coating to reduce the friction and wear of the cleaning plate during reciprocating motion.

[0013] Preferably, the driving source of the reciprocating structure is a servo motor, and the reciprocating speed and frequency of the cleaning plate are accurately controlled by a controller.

[0014] Compared with the related art, the low-temperature economizer for a circulating fluidized bed boiler provided by the utility model has the following beneficial effects:

[0015] Improve cleaning efficiency: The automatically reciprocating cleaning plate can continuously clean the inside of the low-temperature economizer without stopping the machine, effectively removing the accumulated ash and impurities, thereby significantly improving the cleaning efficiency and reducing manual intervention and downtime;

[0016] Enhanced system thermal efficiency: By timely cleaning of ash accumulation, the heat exchange efficiency of the low-temperature economizer is maintained and improved, allowing the boiler system to more efficiently utilize the heat in the flue gas, reducing energy consumption and improving the thermal efficiency of the entire system;

[0017] Extend equipment life: Long-term accumulation of dust may cause corrosion and blockage to the low-temperature economizer, thus affecting its service life; the application of automatic cleaning devices reduces the damage caused by dust accumulation to the equipment and extends the service life of the equipment;

[0018] Enhanced system safety: The automatic cleaning device avoids the safety risks that may be caused by manual cleaning, such as equipment damage and personal injury, thereby improving the safety of the entire boiler system;

[0019] Reduce maintenance costs: Due to the improvement of cleaning efficiency and effect, equipment failure and downtime caused by dust accumulation are reduced, thereby reducing equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a low-temperature economizer for a circulating fluidized bed boiler provided by the utility model;

[0021] Figure 2 for Figure 1 The schematic diagram of the structure inside the low-temperature economizer shown;

[0022] Figure 3 for Figure 1 The structural schematic diagram of the reciprocating mechanism shown;

[0023] Figure 4 for Figure 1 The schematic structural diagram of the impact device shown.

[0024] Numbers in the figure: 1. Low-temperature economizer; 2. Cleaning plate; 3. Slide groove; 4. J-type slide plate; 5. Impact bar; 6. Stop block; 7. Reciprocating structure; 8. Impact device; 71. Reciprocating screw rod; 72. Reciprocating slider; 81. Driving bevel gear; 82. Driven bevel gear; 83. Shift block; 84. Shift groove; 85. Buffer spring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0027] See also Figure 1-4, a low-temperature economizer for a circulating fluidized bed boiler, the low-temperature economizer for a circulating fluidized bed boiler comprising: a low-temperature economizer 1, a J-shaped slide plate 4, a reciprocating structure 7 and an impact device 8, a cleaning plate 2 that can be reciprocated is installed inside the low-temperature economizer 1, and a slide groove 3 is opened inside the low-temperature economizer 1, the J-shaped slide plate 4 is slidably connected to the outer wall of the low-temperature economizer 1, and an impact bar 5 is installed at one end of the J-shaped slide plate 4, the top of the cleaning plate 2 is located directly below the impact bar 5 and is fixedly connected to a stopper 6, the reciprocating structure 7 is installed in the slide groove 3 inside the low-temperature economizer 1, and is installed in cooperation with the cleaning plate 2. An impact device 8 is installed on the outside of the low-temperature economizer 1, and is installed in cooperation with the J-type slide plate 4. A slide bar is fixedly connected to the outside of the low-temperature economizer 1, and the slide bar is slidably connected to the J-type slide plate 4. The inner wall of the slide groove 3 of the low-temperature economizer 1 is provided with a wear-resistant coating to reduce the friction and wear of the cleaning plate 2 in the reciprocating motion. The driving source of the reciprocating structure 7 is a servo motor, and the reciprocating motion speed and frequency of the cleaning plate 2 are accurately controlled by the controller.

[0028] See also Figure 2-3 The reciprocating structure 7 includes: a reciprocating screw 71, a driving source is fixedly connected to the outer wall of the low-temperature economizer 1, the inner wall of the slide groove 3 is rotatably connected to the reciprocating screw 71, the output end of the driving end is fixedly connected to the reciprocating screw 72, and a reciprocating slider 73 is fixedly connected to one side of the cleaning plate 2. The reciprocating slider 73 is installed in conjunction with the reciprocating screw 72, and the reciprocating slider 73 is slidably connected to the slide groove 3.

[0029] See also Figure 3-4 The impact device 8 includes: a driving bevel gear 81, one end of the reciprocating screw rod 71 extends out of the low-temperature economizer 1 and is fixedly connected to the driving bevel gear 81, the outer wall of the low-temperature economizer 1 is rotatably connected to the driven bevel gear 82, the driving bevel gear 81 is meshed and connected with the driven bevel gear 82, and a shift block 83 is fixedly connected to the outer side of the driven bevel gear 82 away from the center of the circle, a shift groove 84 is opened on one side of the J-shaped slide plate 4, and the shift groove 84 is slidably connected to the shift block 83, and a buffer spring 85 is fixedly connected to one end of the J-shaped slide plate 4 at an equal distance, and a plurality of buffer springs 85 are fixedly connected to the back of the impact bar 5, and the length of the shift groove 84 is the same as the diameter of the driven bevel gear 82.

[0030] The working principle of the low temperature economizer for a circulating fluidized bed boiler provided by the utility model is as follows:

[0031] First, the cleaning plate 2 reciprocates inside the low-temperature economizer 1 through the reciprocating structure 7; the reciprocating structure 7 includes a reciprocating screw 71, a driving source (such as a servo motor) and a reciprocating slider 73; the driving source drives the reciprocating screw 71 to rotate, and the reciprocating slider 73 is installed in conjunction with the reciprocating screw 71 and slides in the slide groove 3, thereby driving the cleaning plate 2 to reciprocate; this reciprocating motion enables the cleaning plate 2 to continuously clean the inside of the low-temperature economizer 1 to remove accumulated dust and impurities;

[0032] At the same time, the external impact device 8 is connected to the reciprocating screw 71 through a bevel gear transmission mechanism; when the reciprocating screw 71 rotates, the active bevel gear 81 rotates accordingly, meshing with the driven bevel gear 82, thereby driving the driven bevel gear 82 to rotate; during the rotation process, the shifting block 83 on the outer side of the driven bevel gear 82 will periodically enter the shifting groove 84 opened on one side of the J-shaped slide plate 4, pushing the J-shaped slide plate 4 to slide on the outer wall of the low-temperature economizer 1; when the shifting block 83 leaves the shifting groove 84, the J-shaped slide plate 4 is reset under the action of the buffer spring; this periodic sliding enables the impact bar 5 at one end of the J-shaped slide plate 4 to periodically hit the stopper 6 at the top of the cleaning plate 2, generating an impact force to assist the cleaning plate 2 in cleaning the accumulated dust;

[0033] By combining internal reciprocating cleaning and external impact, the present invention can effectively clean the ash deposits inside the low-temperature economizer 1; the reciprocating cleaning plate 2 removes most of the ash deposits through reciprocating motion, and the impact device 8 further cleans the stubborn ash deposits that are difficult to remove through periodic impact action, thereby ensuring the cleanliness of the inner wall of the low-temperature economizer 1.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low temperature economizer for a circulating fluidized bed boiler, characterized in that: include: A low-temperature economizer (1) is provided with a reciprocating cleaning plate (2) inside, and a slide groove (3) is provided inside the low-temperature economizer (1); A J-shaped slide plate (4) is slidably connected to the outer wall of the low-temperature economizer (1), and an impact bar (5) is installed at one end of the J-shaped slide plate (4), and a stopper (6) is fixedly connected to the top end of the cleaning plate (2) located just below the impact bar (5); The reciprocating structure (7) is installed in the slide groove (3) inside the low-temperature economizer (1) and is installed in conjunction with the cleaning plate (2); An impact device (8) is installed on the outside of the low-temperature economizer (1) and is installed in coordination with the J-shaped slide plate (4).

2. The low-temperature economizer for a circulating fluidized bed boiler according to claim 1, characterized in that: The reciprocating structure (7) comprises a reciprocating screw (71), an outer wall of the low-temperature economizer (1) is fixedly connected to a driving source, an inner wall of the slide groove (3) is rotatably connected to the reciprocating screw (71), a driving end output end is fixedly connected to the reciprocating screw (71), one side of the cleaning plate (2) is fixedly connected to a reciprocating slider (72), the reciprocating slider (72) is mounted in cooperation with the reciprocating screw (71), and the reciprocating slider (72) is slidably connected to the slide groove (3).

3. The low temperature economizer for a circulating fluidized bed boiler according to claim 1, characterized in that: The impact device (8) comprises: a driving bevel gear (81); one end of the reciprocating screw rod (71) extends out of the low-temperature economizer (1) and is fixedly connected to the driving bevel gear (81); the outer wall of the low-temperature economizer (1) is rotatably connected to a driven bevel gear (82); the driving bevel gear (81) is meshingly connected to the driven bevel gear (82); a shifting block (83) is fixedly connected to the outer side of the driven bevel gear (82) away from the center of the circle; a shifting groove (84) is provided on one side of the J-shaped slide plate (4); the shifting groove (84) is slidably connected to the shifting block (83); a buffer spring (85) is fixedly connected to one end of the J-shaped slide plate (4) at an equal distance; and a plurality of buffer springs (85) are fixedly connected to the back side of the impact bar (5).

4. The low-temperature economizer for a circulating fluidized bed boiler according to claim 3, characterized in that: The length of the shifting groove (84) is the same as the diameter of the driven bevel gear (82).

5. The low temperature economizer for a circulating fluidized bed boiler according to claim 1, characterized in that: A sliding bar is fixedly connected to the outer side of the low-temperature economizer (1), and the sliding bar is slidably connected to the J-shaped sliding plate (4).

6. The low temperature economizer for a circulating fluidized bed boiler according to claim 1, characterized in that: The inner wall of the slide groove (3) of the low-temperature economizer (1) is provided with a wear-resistant coating to reduce the friction and wear of the cleaning plate (2) during reciprocating motion.

7. The low temperature economizer for a circulating fluidized bed boiler according to claim 2, characterized in that: The driving source of the reciprocating structure (7) is a servo motor, and the reciprocating speed and frequency of the cleaning plate (2) are accurately controlled by a controller.

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