Smoke exhaust device for boiler of thermal power plant

Abstract

The utility model discloses a boiler smoke exhaust device of a thermal power plant, and relates to the technical field of combustion equipment. A boiler smoke exhaust device of a thermal power plant comprises a smoke exhaust treatment box, two filter screen plates and a filter plate cleaning structure are slidably mounted in the smoke exhaust treatment box, the filter plate cleaning structure is located on the smoke exhaust treatment box, and the filter plate cleaning structure comprises two electric telescopic rods, two brush boxes, a connecting hose and a dust collector. An electric telescopic rod drives a brush box to brush the surface of a filter screen plate, a dust suction machine is matched with dust suction holes to suck away impurities on bristles for self-cleaning, the impurities on the surface of the filter screen plate are effectively cleaned away, meanwhile, an exhaust fan reversely purges filtered air to the filter screen plate through a rotating pipe and an air spraying head, and the dust removal efficiency is improved. Residual impurities in the filter screen plate can be deeply cleaned, the cleaning effect of the filter screen plate is greatly improved, the permeability of the filter screen plate is ensured, and the smoke exhaust treatment box always keeps good filtering performance.

Description

Technical Field

[0001] This utility model relates to the field of combustion equipment technology, and in particular to a boiler exhaust device for thermal power plants. Background Technology

[0002] In the operation of thermal power plants, the boiler is the core equipment, and its flue gas exhaust process is crucial. The flue gas produced after the boiler burns fuel contains a large number of pollutants. If it is directly discharged into the atmosphere, it will cause serious environmental pollution. Therefore, it must be treated by the flue gas exhaust device. Among them, the filter plate is one of the key components, which is used to intercept particulate matter in the flue gas and reduce pollutant emissions.

[0003] The filter plate structure commonly used in the flue gas exhaust system of thermal power plant boilers accumulates a large amount of dust and particulate matter after long-term operation. This dust gradually clogs the pores of the filter plate, leading to increased exhaust resistance, affecting the normal operating efficiency of the boiler, and increasing energy consumption. However, most existing flue gas exhaust systems lack an effective filter plate cleaning structure. When the filter plate needs cleaning, it is usually necessary to shut down the machine, remove the filter plate from the flue gas exhaust system, and clean or replace it manually. This cleaning method is not only cumbersome and time-consuming, but also causes the boiler to shut down, affecting the continuity of power generation. Therefore, we propose a flue gas exhaust system for thermal power plant boilers. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide a flue gas exhaust device for boilers in thermal power plants. This device can solve the problem that most existing flue gas exhaust devices lack an effective filter plate cleaning structure. When the filter plate needs to be cleaned, it is usually necessary to stop the machine and remove the filter plate from the flue gas exhaust device for manual cleaning or replacement. This cleaning method is not only cumbersome and time-consuming, but also causes the boiler to stop, affecting the continuity of power generation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler exhaust device for thermal power plants, comprising:

[0006] The smoke treatment box has two filter screens that slide inside.

[0007] The filter plate cleaning structure is located on the smoke exhaust treatment box.

[0008] The filter plate cleaning structure includes two electric telescopic rods, two brush boxes, a connecting hose, and a vacuum cleaner. The two electric telescopic rods are fixedly installed on one side of the smoke treatment box. The telescopic ends of the two electric telescopic rods slide into the interior of the smoke treatment box and are fixedly connected to the corresponding brush boxes. The bristles on the two brush boxes are in contact with the corresponding filter plates. Multiple suction holes are opened on the side of the two brush boxes near the bristles. The connecting hose is fixedly connected to the top of the vacuum cleaner. The two ends of the connecting hose away from the vacuum cleaner extend into the interior of the smoke treatment box and communicate with the interior of the corresponding brush boxes.

[0009] Preferably, the filter plate cleaning structure further includes two rotating tubes, two toothed rings, an electric push rod, a support plate, a toothed plate, an exhaust fan, and an air supply pipe. The two rotating tubes are rotatably connected inside the smoke exhaust treatment box, and both ends of the two rotating tubes extend rotatably to the outside of the smoke exhaust treatment box. The exhaust fan is fixedly installed on the side of the smoke exhaust treatment box near the vacuum cleaner. The exhaust end of the exhaust fan is fixedly connected to the air supply pipe. Both ends of the air supply pipe away from the exhaust fan are connected to the inside of the corresponding rotating tube. The two toothed rings are fixedly sleeved on the outer surface of the corresponding rotating tube. The support plate is fixedly connected to one side of the smoke exhaust treatment box. The electric push rod is fixedly installed on the top of the support plate. The telescopic end of the electric push rod is fixedly connected to the toothed plate, and the toothed plate is engaged with the two toothed rings.

[0010] Preferably, the exhaust end of the exhaust fan is threaded with a filter cover.

[0011] Preferably, multiple jet heads are fixedly connected to the outer surfaces of the two rotating tubes, and each jet head communicates with the interior of the corresponding rotating tube.

[0012] Preferably, the smoke exhaust treatment box has two collection boxes that are slidably connected inside, and both collection boxes are in contact with one side of the corresponding filter plate.

[0013] Preferably, the top of the smoke exhaust treatment box is bolted with a top cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The boiler exhaust system of this thermal power plant uses an electric telescopic rod to drive a brush box to brush the surface of the filter screen, and a vacuum cleaner with suction holes to remove impurities from the brush bristles for self-cleaning. This achieves effective cleaning of impurities on the surface of the filter screen. At the same time, the exhaust fan blows filtered air through a rotating pipe and jet nozzle to reverse-sweep the filter screen, which can thoroughly clean residual impurities inside the filter screen, greatly improving the cleaning effect of the filter screen, ensuring the permeability of the filter screen, and keeping the exhaust treatment box maintaining good filtration performance at all times. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the filter screen structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the smoke exhaust treatment box of this utility model;

[0020] Figure 4 This is a schematic diagram of the brush box structure of this utility model.

[0021] Reference numerals: 1. Smoke extraction box; 2. Electric telescopic rod; 3. Collection box; 4. Electric push rod; 5. Support plate; 6. Toothed plate; 7. Toothed ring; 8. Air jet head; 9. Vacuum cleaner; 10. Connecting hose; 11. Exhaust fan; 12. Filter cover; 13. Air supply pipe; 14. Rotating pipe; 15. Brush box; 16. Filter screen; 17. Suction hole. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Please see Figure 1-4This utility model provides a technical solution: a flue gas exhaust device for a thermal power plant boiler, comprising:

[0027] Smoke treatment box 1, with two filter screens 16 slidably installed inside smoke treatment box 1;

[0028] The filter plate cleaning structure is located on the smoke exhaust treatment box 1.

[0029] The filter plate cleaning structure includes two electric telescopic rods 2, two brush boxes 15, a connecting hose 10, and a vacuum cleaner 9. The two electric telescopic rods 2 are fixedly installed on one side of the smoke treatment box 1. The telescopic ends of the two electric telescopic rods 2 slide into the interior of the smoke treatment box 1 and are fixedly connected to the corresponding brush boxes 15. The bristles on the two brush boxes 15 are in contact with the corresponding filter plates 16. The side of the two brush boxes 15 near the bristles is provided with multiple suction holes 17. The connecting hose 10 is fixedly connected to the top of the vacuum cleaner 9. The two ends of the connecting hose 10 away from the vacuum cleaner 9 are connected to the interior of the smoke treatment box 1 and the interior of the corresponding brush boxes 15.

[0030] The filter plate cleaning structure also includes two rotating tubes 14, two toothed rings 7, an electric push rod 4, a support plate 5, a toothed plate 6, an exhaust fan 11, and an air supply pipe 13. The two rotating tubes 14 are rotatably connected to the inside of the smoke treatment box 1, and both ends of the two rotating tubes 14 extend rotatably to the outside of the smoke treatment box 1. The exhaust fan 11 is fixedly installed on the side of the smoke treatment box 1 near the vacuum cleaner 9. The exhaust end of the exhaust fan 11 is fixedly connected to the air supply pipe 13. Both ends of the air supply pipe 13 away from the exhaust fan 11 are connected to the inside of the corresponding rotating tube 14. The two toothed rings 7 are fixedly sleeved on the outer surface of the corresponding rotating tube 14. The support plate 5 is fixedly connected to one side of the smoke treatment box 1. The electric push rod 4 is fixedly installed on the top of the support plate 5. The telescopic end of the electric push rod 4 is fixedly connected to the toothed plate 6. The toothed plate 6 is meshed with the two toothed rings 7.

[0031] The exhaust fan 11 has a filter cover 12 threaded onto its exhaust end. Multiple jet nozzles 8 are fixedly connected to the outer surfaces of the two rotating pipes 14. Each jet nozzle 8 communicates with the interior of the corresponding rotating pipe 14. Two collection boxes 3 are slidably connected inside the smoke exhaust treatment box 1. Each collection box 3 contacts one side of the corresponding filter screen 16. A top cover is bolted to the top of the smoke exhaust treatment box 1.

[0032] Furthermore, when using this device, during the operation of the boiler in a thermal power plant, the flue gas generated enters the flue gas treatment box 1 for purification. The flue gas treatment box 1 is equipped with two sliding filter screens 16. The flue gas first passes through the filter screens 16, and the particulate matter and other impurities are intercepted on the surface of the filter screens 16, thus achieving preliminary filtration.

[0033] When a certain amount of impurities accumulate on the surface of the filter screen 16 and need to be cleaned, the filter screen cleaning structure starts to work. The two electric telescopic rods 2 are activated, and the two electric telescopic rods 2 drive the corresponding brush boxes 15 to reciprocate on the surface of the filter screen 16. The bristles on the brush boxes 15 contact the surface of the filter screen 16 and brush off the impurities.

[0034] When the electric push rod 4 is activated, it pushes the toothed plate 6 to move in a straight line. Since the toothed plate 6 is engaged with two toothed rings 7, which are fixedly sleeved on the rotating tube 14, the movement of the toothed plate 6 drives the two rotating tubes 14 to rotate within a small range. At the same time, the exhaust fan 11 works, drawing in outside air at its exhaust end. After being filtered by the filter cover 12, the clean air is delivered to the rotating tube 14 through the air supply pipe 13. The air is sprayed out from multiple jet nozzles 8 on the outer surface of the rotating tube 14, which blows the filter screen 16 in the opposite direction, further removing the impurities inside the filter screen 16 and any remaining impurities. The blown-off impurities fall into the collection box 3 below for centralized processing.

[0035] When it is necessary to clean the brush bristles on the brush box 15 regularly, the vacuum cleaner 9 operates and creates a negative pressure inside the brush box 15 through the connecting hose 10, so that the dust attached to the brush bristles on the brush box 15 can be sucked in from multiple suction holes 17 and finally collected into the vacuum cleaner 9 through the connecting hose 10, thus completing the cleaning of the surface of the filter plate 16.

[0036] The electric telescopic rod 2 drives the brush box 15 to brush the surface of the filter screen plate 16, and the vacuum cleaner 9, in conjunction with the suction hole 17, sucks away the impurities on the brush bristles for self-cleaning, thus effectively cleaning the impurities on the surface of the filter screen plate 16. At the same time, the exhaust fan 11 blows the filtered air through the rotating pipe 14 and the jet nozzle 8 to the filter screen plate 16 in the opposite direction, which can thoroughly clean the residual impurities inside the filter screen plate 16, greatly improving the cleaning effect of the filter screen plate 16, ensuring the permeability of the filter screen plate 16, and keeping the smoke exhaust treatment box 1 maintaining good filtration performance at all times.

[0037] Structural Description: Flue Gas Treatment Box 1: Provides a space for purifying flue gas generated by boilers in thermal power plants, accommodating components such as filter screens and filter cleaning structures, allowing the flue gas to be filtered and cleaned in a relatively enclosed environment;

[0038] Electric telescopic rod 2: drives brush box 15 to reciprocate on the surface of filter screen plate 16, so as to brush off impurities on the surface of filter screen plate 16.

[0039] Electric push rod 4: pushes the toothed plate 6 to make linear motion, providing power to drive the rotating tube 14 to rotate;

[0040] Support plate 5: Provides a fixed mounting position for electric push rod 4 to ensure the stability of electric push rod 4 during operation;

[0041] Toothed plate 6: meshes with two toothed rings 7, and moves linearly under the push of electric push rod 4, thereby driving the two rotating tubes 14 to rotate;

[0042] Gear ring 7: It is fixedly sleeved on the rotating tube 14 and meshes with the gear plate 6, converting the linear motion of the gear plate 6 into the rotational motion of the rotating tube 14.

[0043] Exhaust fan 11: When working, its exhaust end draws in outside air to provide the airflow required for purging the jet head 8, while its exhaust end delivers air to the rotating tube 14 through the air supply pipe 13.

[0044] Jet head 8: Fixedly connected to the outer surface of the rotating tube 14 and communicating with the inside of the rotating tube 14, it sprays out the air in the rotating tube 14 to back-blow the filter screen 16 and remove the internal and residual impurities.

[0045] Vacuum cleaner 9: When working, the brush box 15 is created by the connecting hose 10, which draws in and collects the dust attached to the brush bristles, thus cleaning the brush bristles.

[0046] Connecting hose 10: It is fixedly connected to the top of the vacuum cleaner 9, and its two ends extend into the interior of the smoke treatment box 1 and communicate with the interior of the corresponding brush box 15, providing a channel for dust to be sucked into the vacuum cleaner 9 from the brush box 15;

[0047] Filter cover 12: It is threaded onto the exhaust end of the exhaust fan 11 to filter the outside air drawn by the exhaust fan 11, ensuring that the air entering the device is clean and preventing impurities from re-contaminating the filter screen 16.

[0048] Air supply pipe 13: One end is fixedly connected to the exhaust end of the exhaust fan 11, and both ends of the other end are connected to the interior of the corresponding rotating pipe 14, so as to deliver the clean air discharged by the exhaust fan 11 to the rotating pipe 14.

[0049] Rotating pipe 14: Rotatably connected inside the smoke exhaust treatment box 1, with both ends extending to the outside of the smoke exhaust treatment box 1. Rotation is achieved through the cooperation of toothed ring 7 and toothed plate 6, and the air supplied by air supply pipe 13 is ejected through jet head 8.

[0050] Brush box 15: It is fixedly connected to the telescopic end of the electric telescopic rod 2. The brush bristles contact the surface of the filter screen 16. Under the action of the electric telescopic rod 2, it brushes off the impurities on the surface of the filter screen 16. At the same time, its interior is connected to the vacuum cleaner 9 through the connecting hose 10, which makes it easy to clean the dust on the brush bristles.

[0051] Filter plate 16: It is slidably installed inside the smoke treatment box 1. When the smoke passes through, it intercepts particulate matter and other impurities to achieve preliminary filtration. It is a key component for smoke purification.

[0052] Collection box 3: It is slidably connected inside the smoke treatment box 1 and contacts one side of the corresponding filter screen 16. It is used to collect the blown-off impurities for centralized treatment.

[0053] Suction holes 17: are opened on the side of the brush box 15 near the bristles. Multiple suction holes 17 connect the inside of the brush box 15 with the outside, and suck the dust attached to the bristles into the brush box 15 when the vacuum cleaner 9 is working.

[0054] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A flue gas exhaust system for a thermal power plant boiler, characterized in that, include: Smoke treatment box (1), with two filter screens (16) slidably installed inside the smoke treatment box (1); The filter plate cleaning structure is located on the smoke exhaust treatment box (1); The filter plate cleaning structure includes two electric telescopic rods (2), two brush boxes (15), a connecting hose (10) and a vacuum cleaner (9). The two electric telescopic rods (2) are fixedly installed on one side of the smoke treatment box (1). The telescopic ends of the two electric telescopic rods (2) slide into the interior of the smoke treatment box (1) and are fixedly connected to the corresponding brush boxes (15). The bristles on both brush boxes (15) are in contact with the corresponding filter plates (16). Both brush boxes (15) have multiple suction holes (17) on the side near the bristles. The connecting hose (10) is fixedly connected to the top of the vacuum cleaner (9). The two ends of the connecting hose (10) away from the vacuum cleaner (9) are connected to the interior of the exhaust treatment box (1) and communicate with the interior of the corresponding brush box (15).

2. The flue gas exhaust device for thermal power plant boilers according to claim 1, characterized in that: The filter plate cleaning structure also includes two rotating pipes (14), two toothed rings (7), an electric push rod (4), a support plate (5), a toothed plate (6), an exhaust fan (11), and an air supply pipe (13). The two rotating pipes (14) are rotatably connected to the inside of the smoke treatment box (1). Both ends of the two rotating tubes (14) extend to the outside of the smoke treatment box (1). The exhaust fan (11) is fixedly installed on the side of the smoke treatment box (1) near the vacuum cleaner (9). The exhaust end of the exhaust fan (11) is fixedly connected to the air supply pipe (13). Both ends of the air supply pipe (13) away from the exhaust fan (11) are connected to the inside of the corresponding rotating tube (14). Among them, the two toothed rings (7) are fixedly sleeved on the outer surface of the corresponding rotating tube (14), the support plate (5) is fixedly connected to one side of the smoke exhaust treatment box (1), the electric push rod (4) is fixedly installed on the top of the support plate (5), the telescopic end of the electric push rod (4) is fixedly connected to the toothed plate (6), and the toothed plate (6) is meshed with the two toothed rings (7).

3. The flue gas exhaust device for thermal power plant boilers according to claim 2, characterized in that: The exhaust end of the exhaust fan (11) is threaded with a filter cover (12).

4. The flue gas exhaust device for thermal power plant boilers according to claim 2, characterized in that: Multiple jet heads (8) are fixedly connected to the outer surfaces of the two rotating tubes (14), and each jet head (8) is connected to the interior of the corresponding rotating tube (14).

5. The flue gas exhaust device for thermal power plant boilers according to claim 1, characterized in that: The smoke exhaust treatment box (1) has two collection boxes (3) slidably connected inside, and both collection boxes (3) are in contact with one side of the corresponding filter screen (16).

6. The flue gas exhaust device for thermal power plant boilers according to claim 1, characterized in that: The top cover of the smoke exhaust treatment box (1) is bolted on.

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