Flue gas denitration and dust removal optimization equipment for thermal power plant

Abstract

The utility model discloses a thermal power plant flue gas denitration dust removal optimization device, which relates to the technical field of flue gas dust removal, and comprises a front ash hopper, an ash falling port is arranged at the bottom of the front ash hopper, dust falling components are arranged on the inner wall and the outer wall of the ash falling port, a dust collecting component is arranged below the ash falling port, one side of the ash falling port is communicated with a horizontal flue, and the other side of the ash falling port is communicated with the horizontal flue. The horizontal flue is communicated with the vertical flue, a cleaning assembly is arranged on one side of the vertical flue, and the cleaning assembly is connected with the horizontal flue. According to the flue gas denitration and dust removal optimization equipment for the thermal power plant adopting the structure, dust in the horizontal flue is brushed and cleaned by arranging the cleaning assembly, dust flying and incomplete cleaning are avoided by spraying water mist through the dust falling assembly, and meanwhile, the sprayed water mist scrubs the inner wall of the front ash hopper, so that the dust removal efficiency is improved. Dust attached to the interior is effectively removed; and by arranging the dust recycling assembly, falling dust is collected, cleaning is convenient, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas dust removal, in particular to an optimized device for denitrification and dust removal of flue gas in a thermal power plant. Background Technique

[0002] The denitrification equipment of the flue gas in the thermal power plant is arranged between the economizer and the air preheater of the boiler. A pre - ash hopper is arranged at the inlet section. The pre - ash hopper is connected to the denitrification equipment of the flue gas through a horizontal flue and a rising flue. The flue gas to be treated enters the pre - ash hopper from the outlet of the economizer. The dust is intercepted by the ash - blocking and guiding plate in the pre - ash hopper, and the dust slides down to the bottom of the pre - ash hopper and is discharged, realizing the separation of the flue gas and particulate dust. The pre - dusted flue gas then enters the reactor through the horizontal flue and the rising flue for treatment.

[0003] The lower part of the pre - ash hopper, as well as the horizontal flue and the rising flue, need to be maintained regularly to remove the dust on the lower part of the pre - ash hopper and the inner wall of the flue. Generally, the flue needs to be disassembled during cleaning, which is rather cumbersome and inconvenient, and the efficiency is low. Content of the Utility Model

[0004] The purpose of the utility model is to provide an optimized device for denitrification and dust removal of flue gas in a thermal power plant, which solves the problems that the lower part of the pre - ash hopper of the existing optimized device for denitrification and dust removal of flue gas, as well as the horizontal flue and the rising flue, need to be maintained regularly, the cleaning is inconvenient, and the efficiency is low.

[0005] To achieve the above - mentioned purpose, the utility model provides an optimized device for denitrification and dust removal of flue gas in a thermal power plant, including a pre - ash hopper. A dust - falling port is arranged at the bottom of the pre - ash hopper. Dust - settling components are arranged on the inner wall and the outer wall of the dust - falling port. A dust - collecting component is arranged below the dust - falling port. One side of the dust - falling port is communicated with a horizontal flue. The horizontal flue is communicated with a vertical flue. A cleaning component is arranged on one side of the vertical flue. The cleaning component is connected to the horizontal flue.

[0006] Preferably, the cleaning component includes a fixed cover sleeved at the end of the horizontal flue. A connecting rod is fixedly connected to the inner side of the fixed cover. The connecting rod is threadedly connected to a cleaning brush. A groove is opened at the central position of the cleaning brush, and a first thread is arranged in the groove.

[0007] Preferably, a storage pipe is arranged below the horizontal flue. A cleaning rod is placed in the storage pipe. One end of the cleaning rod is provided with a second thread, and the other end of the cleaning rod is arranged in an L - shaped structure.

[0008] Preferably, the dust-removing assembly includes a water tank fixedly arranged on the outer wall of the ash discharge opening. A water supply pump is arranged in the water tank. One end of the water supply pump is communicated with one end of a water supply pipe, and the other end of the water supply pipe is communicated with an annular pipe. The annular pipe is fixedly arranged on the inner wall of the ash discharge opening. A plurality of first water mist nozzles are arranged on the side of the annular pipe, and a second water mist nozzle is arranged at the lower part of the annular pipe. The second water mist nozzle is inclined.

[0009] Preferably, the dust collection assembly includes a recovery drawer arranged at the lower part of the ash discharge opening. The recovery drawer is slidably connected to the bottom of the ash discharge opening through a slider and a slide rail. Two clamping blocks are symmetrically arranged on the recovery drawer, and a dust filter screen is arranged on the two clamping blocks.

[0010] Preferably, the annular pipe is fixed on the inner wall of the ash discharge opening through an arc-shaped clamping block.

[0011] Therefore, the present utility model adopts an optimized equipment for denitration and dust removal of flue gas in a thermal power plant with the above structure. By arranging a cleaning assembly to brush and clean the dust in the horizontal flue, water mist is sprayed through the dust-removing assembly to avoid dust flying and incomplete cleaning. At the same time, the sprayed water mist washes the inner wall of the front ash hopper, effectively removing the attached dust inside. By arranging a dust recovery assembly to collect the fallen dust, it is convenient for cleaning and improves the cleaning efficiency.

[0012] The technical solution of the present utility model will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of an embodiment of an optimized equipment for denitration and dust removal of flue gas in a thermal power plant according to the present utility model;

[0014] Figure 2 is a sectional view of an embodiment of an optimized equipment for denitration and dust removal of flue gas in a thermal power plant according to the present utility model;

[0015] Figure 3 is a schematic structural diagram of a cleaning assembly of an optimized equipment for denitration and dust removal of flue gas in a thermal power plant according to the present utility model;

[0016] Figure 4 is a schematic structural diagram of a cleaning brush of an optimized equipment for denitration and dust removal of flue gas in a thermal power plant according to the present utility model;

[0017] Reference numerals: 1, front ash hopper; 2, ash discharge port; 3, horizontal flue; 4, vertical flue; 5, fixed cover; 6, connecting rod; 7, cleaning brush; 8, groove; 9, storage pipe; 10, cleaning rod; 11, water tank; 12, water supply pump; 13, water supply pipe; 14, annular pipe; 15, water mist nozzle I; 16, water mist nozzle II; 17, recovery drawer; 18, slider; 19, slide rail; 20, clamping block; 21, dust filter screen. Detailed implementation manners

[0018] The technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0019] Unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meanings understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar words used in the present utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words such as "including" or "comprising" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] Embodiment

[0021] Please refer to Figures 1-4 , the present utility model provides an optimized device for denitrification and dust removal of flue gas in a thermal power plant, including a front ash hopper 1, a bottom of the front ash hopper 1 is provided with an ash discharge port 2, a dust reduction assembly is arranged on an inner wall and an outer wall of the ash discharge port 2, a dust collection assembly is arranged below the ash discharge port 2, one side of the ash discharge port 2 is communicated with a horizontal flue 3, and the inclined structure of the horizontal flue 3 is conducive to the fall of dust. The horizontal flue 3 is communicated with a vertical flue 4, a cleaning assembly is arranged on one side of the vertical flue 4, and the cleaning assembly is connected to the horizontal flue 3.

[0022] The cleaning component includes a fixed cover 5 sleeved on the end of the horizontal flue 3. A suitable thread is provided at the connection between the fixed cover 5 and the horizontal flue 3, and the two are connected by the thread. A connecting rod 6 is fixedly connected to the inner side of the fixed cover 5. The connecting rod 6 and the cleaning brush 7 are connected by a thread. A groove 8 is opened at the center position of the cleaning brush 7, and a first thread is provided in the groove 8. A storage pipe 9 is arranged below the horizontal flue 3. A cleaning rod 10 is placed in the storage pipe 9. One end of the cleaning rod 10 is provided with a second thread, and the other end of the cleaning rod 10 is arranged in an L-shaped structure. When cleaning the horizontal flue 3, the fixed cover 5 is unscrewed from the end of the horizontal flue 3, and the cleaning brush 7 is unscrewed from the connecting rod 6. The cleaning rod 10 is taken out and the end of the cleaning rod 10 with the second thread is inserted into the groove 8, and the two are connected by rotation.

[0023] The dust-removing component includes a water tank 11 fixedly arranged on the outer wall of the ash discharge port 2. A water supply pump 12 is arranged in the water tank 11. One end of the water supply pump 12 is communicated with a water supply pipe 13, and the other end of the water supply pipe 13 is communicated with an annular pipe 14. The annular pipe 14 is arranged in a quadrilateral structure formed by integrally molding four water pipes. The annular pipe 14 is fixedly arranged on the inner wall of the ash discharge port 2 through arc-shaped clamping blocks. A plurality of first water mist nozzles 15 are arranged on the side of the annular pipe 14, and a second water mist nozzle 16 is arranged at the lower part of the annular pipe 14. The second water mist nozzle 16 is inclined. When the water supply pump 12 is started, water is supplied to the first water mist nozzles 15 and the second water mist nozzle 16 through the water supply pipe 13 and the annular pipe 14. The first water mist nozzles 15 spray water mist to form a water curtain, and the flying dust is brought down and enters the recovery drawer 17. The water mist sprayed by the second water mist nozzle 16 is aimed at the side wall of the ash discharge port 2 to wash the dust on the side wall for cleaning. As Figure 2 shown, certain slopes are provided on the side walls of the ash discharge port 2 to guide the water mist carrying dust into the recovery drawer 17.

[0024] The dust collection component includes a recovery drawer 17 arranged below the ash discharge port 2. The recovery drawer 17 is slidably connected to the bottom of the ash discharge port 2 through a slider 18 and a slide rail 19. Two clamping blocks 20 are symmetrically arranged on the recovery drawer 17, and a dust filter screen 21 is arranged on the two clamping blocks 20. The dust filter screen 21 adsorbs the dust, and the water flows along the dust filter screen 21 into the recovery drawer 17.

[0025] During specific use, the vertical flue 4 is struck with the cleaning rod 10. After striking, the dust will fall into the horizontal flue 3. The fixed cover 5 is unscrewed from the end of the horizontal flue 3, and the cleaning brush 7 is unscrewed from the connecting rod 6 and connected to the cleaning rod 10. Then, holding the cleaning rod 10, it is inserted into the horizontal flue 3 and pulled back and forth continuously, so that the cleaning brush 7 can brush off the dust on the inner wall of the horizontal flue 3 and push the dust into the ash discharge opening 2. At the same time, the water supply pump 12 is started, and water mist is sprayed through the three rows of water mist nozzles one 15 on all four sides to form a water curtain, which will bring down the flying dust into the recycling drawer 17. The water mist sprayed by the row of water mist nozzles two 16 is directed at the side wall of the ash discharge opening 2 to wash the dust on the side wall for cleaning. After the cleaning is completed, the recycling drawer 17 is taken out to clean the sewage and the dust filter screen 21.

[0026] Therefore, the optimized equipment for denitrification and dust removal of flue gas in a thermal power plant with the above structure of the present utility model brushes and cleans the dust in the horizontal flue through the setting of the cleaning component, sprays water mist through the dust reduction component to avoid dust flying and incomplete cleaning, and at the same time, the sprayed water mist washes the inner wall of the preposed ash hopper to effectively remove the attached dust inside; the falling dust is collected through the setting of the dust recycling component, which is convenient for cleaning and improves the cleaning efficiency.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. An optimized device for denitrification and dust removal of flue gas in a thermal power plant, characterized in that: It includes a front ash hopper. A dust discharge opening is provided at the bottom of the front ash hopper. Dust reduction components are provided on the inner and outer walls of the dust discharge opening. A dust collection component is provided below the dust discharge opening. One side of the dust discharge opening is communicated with a horizontal flue, the horizontal flue is communicated with a vertical flue, a cleaning component is provided on one side of the vertical flue, and the cleaning component is connected to the horizontal flue.

2. An optimized device for denitrification and dust removal of flue gas in a thermal power plant according to claim 1, characterized in that: The cleaning component includes a fixed cover sleeved on the end of the horizontal flue. A connecting rod is fixedly connected inside the fixed cover. The connecting rod is threadedly connected to a cleaning brush. A groove is formed at the center position of the cleaning brush, and a first thread is provided in the groove.

3. The optimized equipment for denitrification and dust removal of flue gas in a thermal power plant according to claim 2, wherein: A storage pipe is provided below the horizontal flue. A cleaning rod is placed in the storage pipe. One end of the cleaning rod is provided with a second thread, and the other end of the cleaning rod is provided with an L-shaped structure.

4. An optimized device for denitrification and dust removal of flue gas in a thermal power plant according to claim 3, characterized in that: The dust reduction component includes a water tank fixedly provided on the outer wall of the dust discharge opening. A water supply pump is provided in the water tank. The water supply pump is communicated with one end of a water supply pipe, and the other end of the water supply pipe is communicated with an annular pipe. The annular pipe is fixedly provided on the inner wall of the dust discharge opening. A plurality of first water mist nozzles are provided on the side of the annular pipe, and a second water mist nozzle is provided at the lower part of the annular pipe. The second water mist nozzle is inclined.

5. An optimized device for denitrification and dust removal of flue gas in a thermal power plant according to claim 4, characterized in that: The dust collection component includes a recovery drawer provided below the dust discharge opening. The recovery drawer is slidably connected to the bottom of the dust discharge opening through a slider and a slide rail. Two clamping blocks are symmetrically provided on the recovery drawer, and a dust filter screen is provided on the two clamping blocks.

6. The optimized equipment for denitrification and dust removal of flue gas in a thermal power plant according to claim 5, characterized in that: The annular pipe is fixed on the inner wall of the dust discharge opening through an arc-shaped clamping block.

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