A high-efficiency flue gas desulfurization device for a boiler of a thermal power plant

Abstract

The utility model discloses a thermal power plant boiler flue gas efficient desulfurization device belongs to thermal power desulfurization equipment technical field, the utility model discloses a bottom plate top connection treatment box is connected to filter box, and filter box communicates with treatment box through connecting pipe, and filter box is connected with the smoke pipe. The utility model discloses through the drive motor drive axle rotation, and the axle rotation drives a number of turbulence fan blade rotation, and the flue gas in the treatment box is stirred and scattered, and the driven rod rotates when the axle rotates, and the spray pipe is rotated, and makes two spray heads in the inside longitudinal rotation of treatment box and sprays the flue gas and desulfurization, reaches when the flue gas is sprayed and desulfurized, and the flue gas is turbulence stirring, and makes the spray head wide-angle rotation simultaneously, increases the contact area of flue gas and desulfurizer, makes it fully react, improves the reaction rate and reaction effect of flue gas and desulfurizer.

Description

Technical Field

[0001] This utility model belongs to the technical field of desulfurization equipment for thermal power generation, specifically a high-efficiency desulfurization device for boiler flue gas in thermal power plants. Background Technology

[0002] Thermal power generation is a plant that uses combustible materials (such as coal) as fuel to produce electricity. Its basic production process is as follows: fuel burns to heat water and generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives a turbine to rotate, converting the heat energy into mechanical energy. The turbine then drives a generator to rotate, converting the mechanical energy into electrical energy. During operation, the boilers in thermal power plants produce smoke and dust, which needs to be purified to meet emission standards before being released into the atmosphere to avoid environmental pollution.

[0003] A search revealed a flue gas desulfurization device for thermal power plants, disclosed in patent application number 202322024039.4. The device includes a base, a filter box, and a working box. The filter box and the working box are mounted on the base. The filter box has a filtration and cleaning structure, and the working box has a desulfurization structure. This utility model relates to the field of flue gas desulfurization technology for thermal power plants. The beneficial effects of this application are as follows: By incorporating a filtration and cleaning structure, an electric push rod within the structure drives a drive motor in the motor housing to move. The drive motor rotates a cleaning brush to clean impurities on the filter screen. A pump in the desulfurization structure drives an alkaline solution in a storage tank to spray desulfurize the flue gas in the working box through several nozzles on the outlet pipe. The desulfurized flue gas is discharged through an outlet pipe, resulting in high desulfurization efficiency.

[0004] Although the aforementioned patent uses an electric push rod within the filter cleaning structure to move a drive motor in the motor housing, which in turn drives a cleaning brush to clean impurities on the filter screen, and a pump in the desulfurization structure to drive alkaline solution in the storage tank to spray desulfurize the flue gas in the working chamber through several nozzles on the outlet pipe, and the desulfurized flue gas is discharged through the outlet pipe, in actual use, the flue gas passes through the nozzles too quickly and cannot fully contact and react with the desulfurizing agent, resulting in a poor desulfurization effect on the flue gas.

[0005] Therefore, it is necessary to modify it so that when spraying desulfurization of flue gas, the flue gas is turbulent and stirred, and the nozzle is rotated at a wide angle to increase the contact area between the flue gas and the desulfurizing agent, so that it can react fully and improve the reaction rate and reaction effect of the flue gas and the desulfurizing agent. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide a high-efficiency desulfurization device for flue gas in thermal power plant boilers. This device features turbulence and agitation of the flue gas during spray desulfurization, along with wide-angle rotation of the nozzles to increase the contact area between the flue gas and the desulfurizing agent, ensuring a full reaction and improving the reaction rate and effectiveness. This solves the problem that when flue gas passes through the nozzles too quickly, it cannot fully contact and react with the desulfurizing agent, leading to a decrease in the desulfurization effect on flue dust.

[0007] This utility model provides the following technical solution: A high-efficiency desulfurization device for boiler flue gas in a thermal power plant, comprising a base plate, a treatment box fixedly connected to the right side of the top of the base plate, a filter box fixedly connected to the left side of the top of the base plate, the right side of the filter box being connected to the left side of the treatment box via a connecting pipe, a flue gas inlet pipe being connected to the left side of the filter box, a reaction liquid collection box being connected to the bottom of the treatment box, a heat-resistant partition plate fixedly connected to the upper part of the interior of the treatment box, a flue gas exhaust pipe being connected to the top of the heat-resistant partition plate, the top end of the flue gas exhaust pipe extending to the top of the treatment box, a drive motor fixedly connected to the top of the treatment box, the output end of the drive motor extending to the bottom of the heat-resistant partition plate and fixedly connected to a shaft, the bottom end of the shaft being rotatably connected to the bottom of the inner wall of the treatment box, and a plurality of evenly distributed turbulence fans fixedly connected to the surface of the shaft. The drive motor output end is fixedly connected to a first synchronous pulley. A driven rod is rotatably connected to the right side of the top of the inner wall of the treatment box. A second synchronous pulley is fixedly connected to the upper surface of the driven rod. The surfaces of the first and second synchronous pulleys are connected by a synchronous belt drive. The bottom end of the driven rod extends through to the bottom of the heat-resistant partition plate and is fixedly connected to a high-temperature bevel gear. A desulfurizing agent input pipe is connected to the right side of the treatment box. The left end of the desulfurizing agent input pipe extends through to the interior of the treatment box and is rotatably connected to a rotary joint. A spray pipe is connected to the left side of the rotary joint. Both ends of the spray pipe are connected to nozzles. A high-temperature bevel gear ring is fixedly connected to the surface of the rotary joint. The right side of the high-temperature bevel gear ring is rotatably connected to the right side of the inner wall of the treatment box. The surface of the high-temperature bevel gear meshes with the surface of the high-temperature bevel gear ring.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. This utility model connects the desulfurizing agent conveying device to the desulfurizing agent input pipe, allowing the desulfurizing agent to flow to the spray nozzle for spraying. It connects the exhaust port to the inlet pipe, allowing the flue gas to enter the treatment chamber after preliminary filtration by the filter box. During desulfurization, a drive motor rotates the shaft, which in turn rotates several turbulence fan blades to agitate and disperse the flue gas inside the treatment chamber. Simultaneously, the shaft rotation, through the transmission of the first and second synchronous pulleys, drives the driven rod to rotate. When activated, the high-temperature bevel gear rotates, which in turn drives the high-temperature bevel gear ring to rotate. The rotation of the high-temperature bevel gear ring, in turn, drives the spray pipe to rotate, causing the two nozzles to rotate longitudinally inside the treatment chamber to spray and desulfurize the flue gas. After desulfurization, the flue gas is discharged through the exhaust pipe. This achieves the goal of turbulent agitation of the flue gas during spray desulfurization, while simultaneously allowing the nozzles to rotate at a wide angle, increasing the contact area between the flue gas and the desulfurizing agent, ensuring a full reaction, and improving the reaction rate and effect of the flue gas and the desulfurizing agent.

[0010] 2. This utility model, by setting up a filter plate, can perform preliminary filtration of flue gas before it enters the treatment box, reducing particulate matter in the flue gas and facilitating the reaction between the flue gas and the desulfurizing agent. At the same time, by using bolts to fix the mounting plate to the filter box, the bolts can be loosened to easily remove the mounting plate and filter plate from the inside of the filter box, making it convenient to clean or replace the filter plate. By setting up a sealing strip, the gaps at the contact surfaces of the mounting plate and the filter box are sealed, preventing flue gas from flowing out from the gaps and affecting the flue gas treatment effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the rear view structure of this utility model.

[0013] Figure 3 This is a frontal sectional view of the present invention.

[0014] Figure 4 This is a schematic diagram of the left-side cross-sectional structure of this utility model.

[0015] Figure 5 This is a schematic diagram of the cross-sectional structure of the present invention viewed from below.

[0016] Figure 6 This utility model Figure 3 A magnified structural diagram of A in the middle. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figures 1 to 6 As shown, the high-efficiency desulfurization device for boiler flue gas in a thermal power plant in this embodiment includes a base plate 1. A treatment box 2 is fixedly connected to the right side of the top of the base plate 1, and a filter box 3 is fixedly connected to the left side of the top of the base plate 1. The right side of the filter box 3 is connected to the left side of the treatment box 2 through a connecting pipe. An inlet pipe 4 is connected to the left side of the filter box 3. A reaction liquid collection box 5 is connected to the bottom of the treatment box 2, and a drain valve pipe is connected to the back of the reaction liquid collection box 5. A heat-resistant partition plate 6 is fixedly connected to the upper part of the interior of the treatment box 2. An exhaust pipe 7 is connected to the top of the heat-resistant partition plate 6. The top end of the exhaust pipe 7 extends to the top of the treatment box 2. A drive motor 8 is fixedly connected to the top of the treatment box 2. The output end of the drive motor 8 extends to the bottom of the heat-resistant partition plate 6 and is fixedly connected to a shaft 9. The bottom end of the shaft 9 is rotatably connected to the bottom of the inner wall of the treatment box 2. A number of evenly distributed turbulence fan blades 10 are fixedly connected to the surface of the shaft 9. A first synchronous pulley 11 is fixedly connected to the surface of the output end of the machine 8. A driven rod 12 is rotatably connected to the right side of the top of the inner wall of the treatment box 2. A second synchronous pulley 13 is fixedly connected to the upper surface of the driven rod 12. The surfaces of the first synchronous pulley 11 and the second synchronous pulley 13 are connected by a synchronous belt drive. The bottom end of the driven rod 12 passes through to the bottom of the heat-resistant partition plate 6 and is fixedly connected to a high-temperature bevel gear 14. A desulfurizing agent input pipe 15 is connected to the right side of the treatment box 2. The left end of the desulfurizing agent input pipe 15 passes through to the interior of the treatment box 2 and is rotatably connected to a rotary joint 16. A spray pipe 17 is connected to the left side of the rotary joint 16. Both the front and rear ends of the spray pipe 17 are connected to nozzles 18. A high-temperature bevel gear ring 19 is fixedly connected to the surface of the rotary joint 16. The right side of the high-temperature bevel gear ring 19 is rotatably connected to the right side of the inner wall of the treatment box 2. The surface of the high-temperature bevel gear 14 meshes with the surface of the high-temperature bevel gear ring 19.

[0019] refer to Figure 3 A filter plate 20 is inserted inside the filter box 3. A mounting plate 21 is fixedly connected to the top of the filter plate 20. Sealing strips 22 are fixedly connected to the left and right sides of the bottom of the mounting plate 21. The four corners of the mounting plate 21 are movably connected to the top of the filter box 3 by bolts.

[0020] In this embodiment, by setting up a filter plate 20, preliminary filtration can be performed on the flue gas before it enters the treatment box 2, reducing particulate matter in the flue gas and facilitating the reaction between the flue gas and the desulfurizing agent. At the same time, by using bolts to fix the mounting plate 21 to the filter box 3, the bolts can be loosened to easily remove the mounting plate 21 and the filter plate 20 from the inside of the filter box 3, making it convenient to clean or replace the filter plate 20. By setting up a sealing strip 22, the gap at the contact surface between the mounting plate 21 and the filter box 3 is sealed, preventing flue gas from flowing out of the gap and affecting the flue gas treatment effect.

[0021] refer to Figure 3 A crossbar 23 is fixedly connected to both the left and right sides below the surface of the shaft 9. A vertical scraper 24 is fixedly connected to the outer end of the crossbar 23. The outer side of the vertical scraper 24 is in contact with the inner wall of the processing box 2. A horizontal scraper 25 is fixedly connected to the bottom of the vertical scraper 24. The bottom of the horizontal scraper 25 is in contact with the bottom of the inner wall of the processing box 2.

[0022] In this embodiment, the horizontal bar 23, vertical scraper 24, and horizontal scraper 25 are used in combination. When the shaft 9 rotates, the vertical scraper 24 and horizontal scraper 25 are driven to clean the inner wall of the treatment box 2, which avoids the accumulation of flue gas impurities inside the treatment box 2, thus preventing the reaction solution from flowing into the reaction liquid collection box 5 normally.

[0023] refer to Figure 1 The top of the exhaust pipe 7 is threaded with a disassembly ring 26, and a secondary filter element 27 is fixedly connected inside the disassembly ring 26.

[0024] This embodiment uses the disassembly ring 26 and the secondary filter element 27 together to filter the exhaust gas again, ensuring the gas treatment effect. At the same time, the secondary filter element 27 can be removed from the top of the exhaust pipe 7 for cleaning and replacement by twisting the disassembly ring 26.

[0025] refer to Figure 6 A slip ring 28 is fixedly connected to the right side of the high-temperature bevel gear 14. An annular groove 29 that works with the slip ring 28 is provided on the right side of the inner wall of the processing box 2. The surface of the slip ring 28 is rotatably connected to the inner wall of the annular groove 29.

[0026] In this embodiment, by setting up the cooperation of slip ring 28 and annular groove 29, when the high-temperature resistant bevel gear 19 is driven to rotate by the high-temperature resistant bevel gear 14, slip ring 28 rotates inside annular groove 29, which has a reinforcing effect on the high-temperature resistant bevel gear 19, preventing the high-temperature resistant bevel gear 19 from falling off during use and affecting the operation of the device, while making it rotate more smoothly.

[0027] refer to Figure 3 Both the shaft 9 and the driven rod 12 are fixedly connected to the surface of the sealed bearing 30. The surface of the sealed bearing 30 is fixedly connected to the inside of the heat-resistant partition plate 6. A one-way valve 31 is provided at the connection between the filter box 3 and the treatment box 2.

[0028] In this embodiment, by setting a sealed bearing 30, the gap between the shaft 9 and the driven rod 12 and the heat-resistant partition plate 6 is sealed, which prevents the flue gas from entering the heat-resistant partition plate 6 and the dust from adhering to the surface of the internal components, thus affecting the normal use of the device. By setting a one-way valve 31, the flue gas inside the treatment box 2 is blocked, which prevents the flue gas from flowing back and affecting the treatment effect.

[0029] This invention connects the desulfurizing agent conveying device to the desulfurizing agent input pipe 15, allowing the desulfurizing agent to flow to the spray nozzle 18 for spraying. It connects the exhaust port to the inlet pipe 4, allowing the flue gas to enter the treatment box 2 after preliminary filtration by the filter box 3. During desulfurization, the drive motor 8 drives the shaft 9 to rotate. The rotation of the shaft 9 drives several turbulence fan blades 10 to rotate, stirring and dispersing the flue gas inside the treatment box 2. Simultaneously, the rotation of the shaft 9 drives the driven rod 12 to rotate via the transmission of the first synchronous pulley 11 and the second synchronous pulley 13. When the nozzle 12 rotates, it drives the high-temperature bevel gear 14 to rotate. When the high-temperature bevel gear 14 rotates, it drives the high-temperature bevel ring 19 to rotate. The rotation of the high-temperature bevel ring 19 drives the spray pipe 17 to rotate, so that the two nozzles 18 rotate longitudinally inside the treatment box 2 to spray the flue gas for desulfurization. After desulfurization, the flue gas is discharged through the exhaust pipe 7. This achieves the effect of turbulence and agitation of the flue gas during spray desulfurization, and at the same time, the nozzles 18 rotate at a wide angle to increase the contact area between the flue gas and the desulfurizing agent, so that the reaction is fully carried out and the reaction rate and reaction effect of the flue gas and the desulfurizing agent are improved.

Claims

1. A high-efficiency desulfurization device for flue gas from a thermal power plant boiler, comprising a base plate (1), characterized in that: A processing box (2) is fixedly connected to the right side of the top of the base plate (1), and a filter box (3) is fixedly connected to the left side of the top of the base plate (1). The right side of the filter box (3) is connected to the left side of the processing box (2) through a connecting pipe. A smoke inlet pipe (4) is connected to the left side of the filter box (3). A reaction liquid collection box (5) is connected to the bottom of the processing box (2). A heat-resistant partition plate (6) is fixedly connected to the upper part of the inside of the processing box (2). A smoke exhaust pipe (7) is connected to the top of the heat-resistant partition plate (6). The top end of the exhaust pipe (7) extends to the top of the treatment box (2). A drive motor (8) is fixedly connected to the top of the treatment box (2). The output end of the drive motor (8) extends to the bottom of the heat-resistant partition plate (6) and is fixedly connected to a shaft (9). The bottom end of the shaft (9) is rotatably connected to the bottom of the inner wall of the treatment box (2). A number of evenly distributed turbulence fan blades (10) are fixedly connected to the surface of the shaft (9). A first synchronous pulley is fixedly connected to the surface of the output end of the drive motor (8). 11), A driven rod (12) is rotatably connected to the right side of the top of the inner wall of the treatment box (2). A second synchronous pulley (13) is fixedly connected above the surface of the driven rod (12). The surfaces of the first synchronous pulley (11) and the second synchronous pulley (13) are connected by a synchronous belt drive. The bottom end of the driven rod (12) extends through to the bottom of the heat-resistant partition plate (6) and is fixedly connected to a high-temperature bevel gear (14). A desulfurizing agent input pipe (15) is connected to the right side of the treatment box (2). 5) The left end of the tube extends into the interior of the treatment box (2) and is rotatably connected to a rotary joint (16). The left side of the rotary joint (16) is connected to a spray pipe (17). Both the front and rear ends of the spray pipe (17) are connected to nozzles (18). A high-temperature resistant bevel gear ring (19) is fixedly connected to the surface of the rotary joint (16). The right side of the high-temperature resistant bevel gear ring (19) is rotatably connected to the right side of the inner wall of the treatment box (2). The surface of the high-temperature resistant bevel gear (14) meshes with the surface of the high-temperature resistant bevel gear ring (19).

2. The high-efficiency desulfurization device for boiler flue gas in thermal power plants according to claim 1, characterized in that: A filter plate (20) is inserted inside the filter box (3). A mounting plate (21) is fixedly connected to the top of the filter plate (20). Sealing strips (22) are fixedly connected to the left and right sides of the bottom of the mounting plate (21). The four corners of the mounting plate (21) are movably connected to the top of the filter box (3) by bolts.

3. The high-efficiency desulfurization device for boiler flue gas in thermal power plants according to claim 2, characterized in that: A crossbar (23) is fixedly connected to both the left and right sides below the surface of the shaft (9). A vertical scraper (24) is fixedly connected to the outer end of the crossbar (23). The outer side of the vertical scraper (24) is in contact with the inner wall of the processing box (2). A horizontal scraper (25) is fixedly connected to the bottom of the vertical scraper (24). The bottom of the horizontal scraper (25) is in contact with the bottom of the inner wall of the processing box (2).

4. The high-efficiency desulfurization device for boiler flue gas in thermal power plants according to claim 3, characterized in that: The top end of the exhaust pipe (7) is threaded with a disassembly ring (26), and a secondary filter element (27) is fixedly connected inside the disassembly ring (26).

5. The high-efficiency desulfurization device for boiler flue gas in thermal power plants according to claim 4, characterized in that: A slip ring (28) is fixedly connected to the right side of the high-temperature bevel gear (14). An annular groove (29) that works with the slip ring (28) is opened on the right side of the inner wall of the processing box (2). The surface of the slip ring (28) is rotatably connected to the inner wall of the annular groove (29).

6. The high-efficiency desulfurization device for boiler flue gas in thermal power plants according to claim 5, characterized in that: The surfaces of the shaft (9) and the driven rod (12) are fixedly connected with sealed bearings (30), the surface of the sealed bearings (30) is fixedly connected to the interior of the heat-resistant partition plate (6), and a one-way valve (31) is provided at the connection between the filter box (3) and the treatment box (2).

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