Power plant flue gas desulfurization and denitrification device and method

Abstract

The invention relates to the technical field of flue gas treatment devices, in particular to a power plant flue gas desulfurization and denitrification device and method.The power plant flue gas desulfurization and denitrification device comprises a reaction barrel, a cooling barrel is arranged at the upper end of the reaction barrel, a liquid storage barrel is arranged at the upper end of the cooling barrel, and a plurality of liquid supply pipes are evenly arranged at the side end of the reaction barrel in the circumferential direction; the upper end of the liquid supply pipe is communicated with the interior of the liquid storage barrel, and the lower end of the liquid supply pipe is communicated with the interior of the reaction barrel; before flue gas is filtered, the filtered flue gas enters the spiral cooling pipe and is cooled by cooling water in the cooling cylinder to a temperature suitable for subsequent desulfurization and denitrification, and then the flue gas is uniformly discharged into the reaction cylinder sequentially through the mounting pipe, the gas guide pipe box and the exhaust head and reacts with reaction liquid, so that the flue gas desulfurization and denitrification effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas treatment devices, and in particular to a flue gas desulfurization and denitrification device and method for power plants. Background Art

[0002] The power industry is a foundational sector of the national economy. With rapid economic development, my country's electricity demand continues to grow. Air pollutants such as smoke, sulfur dioxide, nitrogen oxides, and the heavy metal mercury generated by coal combustion will also continue to increase. Potential environmental problems are constantly emerging, increasing the severity of acid rain pollution and aggravating the impact of eutrophication of water bodies, directly endangering the human living environment. This poses a severe challenge to my country's atmospheric environmental protection, especially the prevention and control of acid rain pollution.

[0003] Therefore, coal-fired power plants must be equipped with complete environmental protection facilities such as desulfurization and denitrification to effectively control the source of pollution. For example, publication number CN208742281U is a desulfurization and denitrification treatment device for a waste incineration power plant, which includes an air inlet pipe, a second reaction tower and a filter box. The right end of the air inlet pipe is fixed with an air inlet head, a filter plate is installed inside the air inlet pipe, the output end of the air pump is connected to the top of the air pipe, the end of the air pipe is connected to a first air inlet opened at the bottom left of the first reaction tower, the first air outlet is connected to the second air inlet through an intermediate pipe, the second reaction tower is set on the right side of the first reaction tower, a liquid pump is installed above the second reaction tower, a second air outlet is opened on the right side of the second reaction tower, and the filter box is fixed to the end of the connecting pipe. The desulfurization and denitrification treatment device of the waste incineration power plant is convenient for rapid absorption of flue gas and can filter dust and impurities in the flue gas, which can ensure the desulfurization and denitrification effect of the flue gas and is convenient for long-term use.

[0004] However, the above-mentioned existing technologies still have some defects when it comes to desulfurization and denitrification of flue gas from power plants: 1. The above-mentioned existing technologies can filter out dust and impurities contained in the gas through a filter plate fixedly installed inside the air inlet pipe in order to process the gas, but in actual use, the flue gas generated by the power plant is usually accompanied by high temperature, which will affect the subsequent desulfurization and denitrification effects.

[0005] 2. The above-mentioned prior art performs desulfurization and denitrification through the chemical liquid in the first reaction tower and the second reaction tower respectively, and absorbs the odor in the gas through the adsorption plate made of activated carbon material so that the gas can be further processed or discharged. However, in actual use, the long-term desulfurization and denitrification treatment causes the reaction liquid to be diluted, thereby reducing the effect of gas desulfurization and denitrification, and thus failing to meet the emission conditions.

[0006] Based on this, and according to the above-mentioned viewpoints, there is still room for improvement in the existing technology for desulfurization and denitrification of flue gas in power plants. Summary of the Invention

[0007] In order to solve the above technical problems, the present application provides a flue gas desulfurization and denitrification device and method for a power plant, which adopts the following technical solutions: In the first aspect, the present invention provides a flue gas desulfurization and denitrification device for a power plant, comprising a reaction cylinder, a cooling cylinder being provided at the upper end of the reaction cylinder, a liquid storage cylinder being provided at the upper end of the cooling cylinder, a plurality of liquid supply pipes being uniformly provided circumferentially on the side end of the reaction cylinder, and the upper ends of the liquid supply pipes being connected to the interior of the liquid storage cylinder, and the lower ends being connected to the interior of the reaction cylinder, wherein a reaction device is provided at the upper end of the interior of the reaction cylinder.

[0008] Preferably, the reaction device includes a mounting tube arranged at the lower end of the cooling cylinder, a plurality of circumferentially evenly arranged air guide tubes are provided at the side end of the mounting tube, a plurality of exhaust heads are evenly provided at the lower end of the air guide tubes, a liquid supply ring is installed on the upper end side wall of the reaction cylinder body, and the liquid supply ring is connected to the lower end of the liquid supply tube, and a plurality of circumferentially evenly arranged atomizing nozzles are provided on the inner side wall of the liquid supply ring.

[0009] Preferably, a flow guide component is further provided inside the reaction cylinder, and the flow guide component includes a first flow guide plate installed inside the reaction cylinder, a flow guide hole is opened in the middle of the first flow guide plate, and the upper end surface of the first flow guide plate is inclined facing the flow guide hole.

[0010] Preferably, connecting columns are evenly arranged circumferentially on the side ends of the guide holes, and second guide plates are respectively provided at the upper and lower ends of the connecting columns, so that the first guide plates and the second guide plates are arranged alternately, and the upper end surface of the second guide plate is inclined facing the periphery of the second guide plate, and a drainage eaves is provided on the outer side of the lower end of the second guide plate at the lowest end.

[0011] Preferably, a water filter device is provided at the lower end of the reaction cylinder body, and the water filter device includes a mounting cylinder installed at the bottom center of the reaction cylinder body, a mounting ring is rotatably installed on the upper end of the mounting cylinder, and a plurality of connecting arms are evenly arranged around the circumference of the mounting ring.

[0012] Preferably, a filter ring is installed on one end of the connecting arm away from the mounting ring. A filter groove is provided on the upper end of the filter ring, and the filter groove is located directly below the drainage eaves. Water filter holes are evenly provided on the bottom of the filter groove.

[0013] Preferably, a collecting assembly is provided at the bottom side of the reaction cylinder, and the collecting assembly includes a cleaning brush installed on one side of the lower end of the drainage eaves, and the cleaning brush cooperates with the filter tank, and a collecting hole is opened on one side of the bottom of the filter tank.

[0014] Preferably, a collecting port is provided on the side wall of the lower end of the reaction cylinder, a collecting box is slidably installed in the collecting port, the collecting box is located directly below the cleaning brush, and a plurality of filter holes are evenly provided on the bottom of the collecting box.

[0015] Preferably, an exhaust assembly is provided on the mounting cylinder, the exhaust assembly includes a connecting pipe installed on the upper end of the mounting ring, and the connecting pipe is connected to the mounting cylinder, the side wall of the connecting pipe is provided with an arc-shaped guide pipe evenly arranged in the circumferential direction, the side wall of the mounting cylinder is connected to an exhaust pipe (63) connected to the inside of the mounting cylinder, and the exhaust pipe is connected in series with an exhaust pump.

[0016] Preferably, a cooling assembly is provided in the cooling cylinder (12), and the cooling assembly includes a water inlet pipe installed at the upper end of the cooling cylinder and connected to the interior of the cooling cylinder, and a water inlet valve is connected in series on the water inlet pipe. A spiral cooling pipe is provided in the cooling cylinder, and one end of the middle part of the spiral cooling pipe is connected to the installation pipe, and the other end of the spiral cooling pipe is connected to the air inlet pipe, and the air inlet pipe is located outside the reaction cylinder body.

[0017] In a second aspect, the present invention further provides a method for desulfurization and denitrification of flue gas from a power plant, the method comprising the following steps: S1: The flue gas is passed into the air inlet pipe, and after filtering the flue gas, the flue gas is passed into the cooling cylinder for cooling treatment; S2: The filtered flue gas enters the spiral cooling tube for cooling, and is then discharged into the reaction cylinder through the exhaust head on the air guide pipe; S3: The atomizing nozzle sprays the reaction liquid in the liquid storage cylinder into the reaction cylinder, and reacts with the gas in the reaction cylinder to desulfurize and denitrify; S4: The gas after the reaction is completed is discharged through the exhaust pipe, and the solution and impurities after the reaction are filtered by the filter ring and recovered separately.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. Before filtering the flue gas, the filtered flue gas enters the spiral cooling tube and is cooled by cooling water in the cooling cylinder to a suitable temperature for subsequent desulfurization and denitrification. The flue gas is then uniformly discharged into the reaction cylinder through the installation pipe, the air guide tube box and the exhaust head in sequence to react with the reaction liquid, thereby improving the desulfurization and denitrification effects of the flue gas.

[0019] 2. The present invention introduces the reaction liquid inside the liquid storage cylinder into the liquid supply ring through the liquid supply pipe, and atomizes it and sprays it into the reaction cylinder through the atomizing nozzle, so that the reaction liquid and the flue gas can fully react, further improving the effect of the reaction liquid on flue gas desulfurization and denitrification.

[0020] 3. The solution after the reaction of the present invention leaks to the bottom of the reaction cylinder under filtration through the water filter hole and is recycled and processed. New reaction liquid can be synthesized later, thereby improving the utilization rate of the reaction liquid. Solid impurities are cleaned by the cleaning brush and collected in the collection box, thereby avoiding the impurities generated after the reaction from clogging the water filter hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the reaction device of the present invention.

[0023] Figure 3 It is a structural schematic diagram of the diversion component of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the water filtering device of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the collection component of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the exhaust assembly of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the cooling assembly of the present invention.

[0028] Figure 8 It is a schematic structural diagram of the filtering device of the present invention.

[0029] Figure 9 It is a structural schematic diagram of the reflux device of the present invention.

[0030] Explanation of the reference numerals: 11. Reaction cylinder; 12. Cooling cylinder; 13. Liquid storage cylinder; 14. Liquid supply pipe; 15. Steam engine; 16. Generator; 2. Reaction device; 21. Mounting pipe; 22. Air guide pipe; 23. Exhaust head; 24. Liquid supply ring; 25. Atomizing nozzle; 3. Guide assembly; 31. First guide plate; 32. Guide hole; 33. Connecting column; 34. Second guide plate; 35. Drainage eaves; 4. Water filtering device; 41. Mounting cylinder; 42. Mounting ring; 43. Connecting arm; 44. Filter ring; 45. Filter tank; 46. Water filter hole; 5. Collecting assembly; 51. Cleaning Brush; 52. Collection hole; 53. Collection port; 54. Collection box; 55. Filter hole; 6. Exhaust assembly; 61. Connecting pipe; 62. Arc guide pipe; 63. Exhaust pipe; 64. Exhaust pump; 7. Cooling assembly; 71. Water inlet pipe; 72. Water inlet valve; 73. Spiral cooling pipe; 74. Inlet pipe; 8. Filter device; 81. Filter cover; 82. Filter plate; 83. Rotating shaft; 84. Driving blade; 85. Cleaning brush; 86. Recovery box; 87. Adsorption carbon plate; 9. Reflux device; 91. Recovery cylinder; 92. First connecting pipe; 93. Second connecting pipe; 94. Reflux pump. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 to 9 This application is described in further detail.

[0032] The embodiment of the present application discloses a flue gas desulfurization and denitrification device and method for a power plant, which cools the flue gas discharged from the power plant, desulfurizes and denitrifies the flue gas, and then discharges the flue gas.

[0033] Example 1

[0034] refer to Figure 1 A flue gas desulfurization and denitrification device for a power plant includes a reaction cylinder 11. The flue gas discharged from the power plant is desulfurized and denitrified in the reaction cylinder 11. A cooling cylinder 12 is provided at the upper end of the reaction cylinder 11 to ensure that the flue gas is at a suitable temperature during desulfurization and denitrification. The flue gas enters the reaction cylinder 11 after being cooled by the cooling cylinder 12. A liquid storage cylinder 13 is provided at the upper end of the cooling cylinder 12 for storing reaction liquid that reacts with nitrogen oxides and sulfur oxides in the flue gas. A plurality of liquid supply pipes 14 are evenly arranged circumferentially on the side end of the reaction cylinder 11, and the upper end of the liquid supply pipe 14 is connected to the inside of the liquid storage cylinder 13, and the lower end is connected to the inside of the reaction cylinder 11. The liquid supply pipe 14 introduces the reaction liquid in the liquid storage cylinder 13 into the reaction cylinder 11.

[0035] When treating the flue gas from a power plant, the components in the cooling cylinder 12 cool it and discharge it into the reaction cylinder 11. Then the liquid supply pipe 14 introduces the reaction liquid in the liquid storage cylinder 13 into the reaction cylinder 11 to perform desulfurization and denitrification treatment on the flue gas.

[0036] refer to Figure 2 , is a structural diagram of the reaction device 2 of the present invention. In order to make the reaction liquid react with the nitrogen oxides and sulfur oxides in the flue gas in the reaction cylinder 11, thereby performing desulfurization and denitrification treatment on the flue gas, the reaction device 2 is arranged at the upper end of the reaction cylinder 11. The reaction device 2 includes a mounting pipe 21 arranged at the lower end of the cooling cylinder 12. The mounting pipe 21 guides the cooled flue gas in the cooling cylinder 12 out. The side end of the mounting pipe 21 is provided with a plurality of circumferentially evenly arranged air guide pipes 22. The lower end of the air guide pipe 22 is evenly arranged. There are several exhaust heads 23. The air guide pipe 22 and the exhaust head 23 evenly discharge the flue gas in the installation tube 21 into the reaction cylinder 11. A liquid supply ring 24 is installed on the side wall of the upper end of the reaction cylinder 11, and the liquid supply ring 24 is connected to the lower end of the liquid supply pipe 14. The liquid supply pipe 14 introduces the reaction liquid into the liquid supply ring 24. A number of circumferentially evenly arranged atomizing nozzles 25 are provided on the inner side wall of the liquid supply ring 24. The atomizing nozzle 25 evenly atomizes the reaction liquid in the liquid supply ring 24 and sprays it into the reaction cylinder 11 to react with the flue gas.

[0037] The flue gas enters the air guide pipe 22 through the installation pipe 21 and is evenly discharged into the reaction cylinder 11 through the exhaust head 23. The liquid supply pipe 14 introduces the reaction liquid inside the liquid storage cylinder 13 into the liquid supply ring 24, and is atomized and sprayed into the reaction cylinder 11 through the atomizing nozzle 25 so that the reaction liquid and the flue gas can fully react.

[0038] refer to Figure 3, is a structural diagram of the guide component 3 of the present invention. In order to prolong the reaction time of the flue gas and the reaction liquid, a guide component 3 is further provided inside the reaction cylinder 11. The guide component 3 includes a first guide plate 31 installed inside the reaction cylinder 11. A guide hole 32 is opened in the middle of the first guide plate 31, and the upper end surface of the first guide plate 31 is inclined facing the guide hole 32. The solution generated by the reaction of the reaction liquid and the flue gas and the impurities slide into the guide hole 32 along the inclined surface of the upper end of the first guide plate 31 and fall. The side ends of the guide hole 32 are evenly circumferentially provided with connecting columns 33, which connect The connecting column 33 connects the first guide plate 31 and the second guide plate 34. The second guide plates 34 are respectively provided at the upper and lower ends of the connecting column 33, so that the first guide plates 31 and the second guide plates 34 are arranged alternately, and the upper end surface of the second guide plate 34 is inclined toward the outer periphery of the second guide plate 34. The solution and impurities produced by the reaction between the reaction liquid and the flue gas slide along the inclined surface of the upper end of the second guide plate 34 to the outer periphery of the second guide plate 34 and fall. A drainage eaves 35 is provided on the outer side of the lower end of the lowermost second guide plate 34 to guide the solution to drip after falling from the lowermost second guide plate 34.

[0039] The flue gas and the atomized reaction liquid bypass the guide hole 32 on the outside of the second guide plate 34 and the middle of the first guide plate 31 to extend the reaction time of the flue gas and the reaction liquid. While the flue gas and the reaction liquid are reacting, the generated solution and the precipitated impurities are attached to the upper end surfaces of the first guide plate 31 and the second guide plate 34. Due to the inclined setting of the upper end surfaces of the first guide plate 31 and the second guide plate 34, the solution and the precipitated impurities slide to the second guide plate 34 at the bottom and fall from the lower end of the drainage eaves 35.

[0040] refer to Figure 4 , is a structural schematic diagram of the water filtering device 4 of the present invention. In order to separate the impurities in the solution falling from the drainage eaves 35 and the solution, a water filtering device 4 is provided at the lower end of the reaction cylinder 11. The water filtering device 4 includes a mounting cylinder 41 installed at the bottom center of the reaction cylinder 11. A mounting ring 42 is rotatably installed on the upper end of the mounting cylinder 41. The mounting ring 42 is evenly provided with a plurality of connecting arms 43 in a circumferential direction. A filter ring 44 is commonly installed on one end of the connecting arms 43 away from the mounting ring 42. The filter ring 44 can be rotated by rotating the mounting ring 42 to subsequently collect impurities filtered by the filter ring 44. A filter groove 45 is provided on the upper end of the filter ring 44, and the filter groove 45 is located directly below the drainage eaves 35. Water filtering holes 46 are evenly provided at the bottom of the filter groove 45.

[0041] The reacted solution falling from the drainage eaves 35 falls into the filter tank 45 and is separated from the impurities in the solution through the water filter holes 46, so that the reacted solution and the generated impurities are separated into solid and liquid.

[0042] refer to Figure 5, is a structural diagram of the collecting assembly 5 of the present invention. In order to collect the solid impurities filtered out by the filter ring 44 and prevent the clogging of the water filter hole 46 in the filter tank 45, a collecting assembly 5 is provided at the bottom side of the reaction cylinder 11. The collecting assembly 5 includes a cleaning brush 51 installed on one side of the lower end of the drainage eaves 35, and the cleaning brush 51 cooperates with the filter tank 45. When the filter ring 44 rotates, the cleaning brush 51 sweeps through the filter tank 45 to clean the filtered solid impurities in the filter tank 45. The bottom of the filter tank 45 A collecting hole 52 is provided on one side, and a collecting port 53 is provided on the side wall of the lower end of the reaction cylinder 11. A collecting box 54 is slidably installed in the collecting port 53. When the collecting box 54 is closed, the side end of the collecting box 54 is sealed with the collecting port 53 to prevent the flue gas in the reaction cylinder 11 from precipitating from the collecting port 53. The collecting box 54 is located directly below the cleaning brush 51. A number of filter holes 55 are evenly provided on the bottom of the collecting box 54. The filter holes 55 allow the solution entering the collecting box 54 together with the impurities to leak out so as to collect solid impurities.

[0043] After the reaction solution and the precipitated impurities are filtered through the water filter holes 46, the solution leaks down to the bottom of the reaction cylinder 11, and the impurities are filtered by the water filter holes 46 in the filter tank 45. When the filter ring 44 is rotated, the cleaning brush 51 sweeps the solid impurities on the filter tank 45 into the collection box 54 for collection. The solution that enters the collection box 54 along with the cleaning brush 51 leaks down through the filter holes 55.

[0044] refer to Figure 6 , which is a structural schematic diagram of the exhaust component 6 of the present invention. In order to discharge the gas after desulfurization and denitrification in the reaction cylinder 11 and drive the filter ring 44 to rotate, an exhaust component 6 is provided on the mounting cylinder 41. The exhaust component 6 includes a connecting pipe 61 installed on the upper end of the mounting ring 42, and the connecting pipe 61 is connected to the mounting cylinder 41. The rotation of the connecting pipe 61 drives the mounting ring 42 to rotate. The side wall of the connecting pipe 61 is provided with an arc-shaped guide pipe 62 evenly arranged in the circumferential direction. The arrangement of the arc-shaped guide pipe 62 drives the connecting pipe 61 to rotate when the gas at the bottom of the reaction cylinder 11 is absorbed. An exhaust pipe 63 is connected to the side wall of the mounting cylinder 41 to communicate with the inside of the mounting cylinder 41. An exhaust pump 64 is connected in series on the exhaust pipe 63. The exhaust pump 64 drives the gas in the reaction cylinder 11 to be discharged through the arc-shaped guide pipe 62, the connecting pipe 61, the mounting cylinder 41 and the exhaust pipe 63 in sequence.

[0045] The exhaust pump 64 sucks the gas at the bottom of the reaction cylinder 11 through the arc-shaped guide tube 62 and the connecting tube 61, and discharges it through the exhaust pipe 63. The setting of the arc-shaped guide tube 62 enables the exhaust pump 64 to drive the mounting ring 42 to rotate when discharging the gas, and then drives the filter ring 44 to rotate through the connecting arm 43.

[0046] Example 2

[0047] refer to Figure 7On the basis of Example 1, in order to enhance the desulfurization and denitrification effects when the flue gas reacts with the reaction liquid, a cooling assembly 7 is provided in the cooling cylinder 12. The cooling assembly 7 includes a water inlet pipe 71 installed at the upper end of the cooling cylinder 12 to communicate with the interior of the cooling cylinder 12. A water inlet valve 72 is connected in series to the water inlet pipe 71. The water inlet valve 72 controls the cooling water to enter the cooling cylinder 12 from the water inlet pipe 71. A spiral cooling pipe 73 is provided in the cooling cylinder 12 to cool the flue gas to a suitable temperature for subsequent desulfurization and denitrification, so as to enhance the desulfurization and denitrification effects. One end of the middle portion of the spiral cooling pipe 73 is connected to the mounting pipe 21, and the other end of the spiral cooling pipe 73 is connected to the air inlet pipe 74, and the air inlet pipe 74 is located outside the reaction cylinder body 11.

[0048] The flue gas from the power plant enters the spiral cooling pipe 73 through the air inlet pipe 74 , is cooled by the cooling water in the cooling cylinder 12 , and finally enters the reaction cylinder 11 through the mounting pipe 21 .

[0049] refer to Figure 8 The dust and other impurities that enter the smoke through the filter plate 82 are removed by the cleaning brush 85.

[0050] When the flue gas from the power plant flows from the air intake pipe 74, it is filtered by the filter plate 82, and driven by the driving blade 84, the rotating shaft 83 rotates, thereby driving the cleaning brush 85 to clean the dust and other impurities filtered by the filter plate 82 and adhering to the filter plate 82, and finally falls into the recovery box 86 and is adsorbed by the adsorption carbon plate 87.

[0051] Example 3

[0052] refer to Figure 9In order to recycle the solution after the reaction at the bottom of the reaction cylinder 11 for reuse, and to collect the energy generated by the water vapor generated by the cooling flue gas in the cooling cylinder 12, a reflux device 9 is provided between the reaction cylinder 11 and the liquid storage cylinder 13. The reflux device 9 includes a recovery cylinder 91 provided on the side of the reaction cylinder 11 away from the filter cover 81. The recovery cylinder 91 is connected to the reaction cylinder 11 through a first connecting pipe 92. The solution after the reaction at the bottom of the reaction cylinder 11 enters the recovery cylinder 91 through the first connecting pipe 92, and is added to the recovery cylinder 91 by reacting with the drugs to make it have the ability of desulfurization and denitrification again. The recovery cylinder 91 is connected to the liquid storage cylinder 13 through a second connecting pipe 93. A reflux pump 94 is connected in series on the second connecting pipe 93. The reflux pump 94 introduces the solution after the reaction with the drugs in the recovery cylinder 91 into the liquid storage cylinder 13 through the second connecting pipe 93.

[0053] The solution at the bottom of the reaction cylinder 11 enters the recovery cylinder 91 through the first connecting pipe 92. Chemicals are added to the recovery cylinder 91 to make the solution in the recovery cylinder 91 have the ability to desulfurize and denitrify again, and the solution is pumped into the liquid storage cylinder 13 through the reflux pump 94 for subsequent desulfurization and denitrification.

[0054] Replay Figure 1 In order to utilize the water vapor evaporated from the cooling water after cooling the flue gas in the cooling cylinder 12, a steam engine 15 is installed on the top of the cooling cylinder 12. The collecting end of the steam engine 15 is connected to the upper end of the cooling cylinder 12 to collect steam. The output end of the steam engine 15 is connected to the input end of the generator 16, so that the generator 16 generates electricity and stores it. The stored electric energy is supplied to the exhaust pump 64 and the reflux pump 94.

[0055] In addition, the present invention also provides a desulfurization and denitrification method for a power plant, which comprises the following steps: S1: The flue gas is passed into the air inlet pipe 74. The dust and other impurities entering with the flue gas are filtered by the filter plate 82. At the same time, the driving blade 84 drives the rotating shaft 83 to rotate, thereby driving the cleaning brush 85 to clean the dust and other impurities filtered by the filter plate 82. The dust and other impurities adhering to the filter plate 82 eventually fall into the recovery box 86 and are adsorbed by the adsorption carbon plate 87.

[0056] S2: The water inlet valve 72 controls the cooling water to enter the cooling cylinder 12 from the water inlet pipe 71. The filtered flue gas enters the spiral cooling pipe 73 and is cooled by the cooling water in the cooling cylinder 12 to a suitable temperature for subsequent desulfurization and denitrification. It is then evenly discharged into the reaction cylinder 11 through the installation pipe 21, the air guide pipe 22 and the exhaust head 23 in sequence.

[0057] S3: The reaction liquid in the liquid storage cylinder 13 flows into the liquid supply ring 24 through the liquid supply pipe 14, and the atomizing nozzle 25 atomizes and sprays the reaction liquid in the liquid supply ring 24 into the reaction cylinder body 11 to react with the flue gas in the reaction cylinder body 11 for desulfurization and denitrification, and the alternate arrangement of the first flow guide plate 31 and the second flow guide plate 34 prolongs the reaction time of the reaction liquid and the flue gas.

[0058] S4: The reacted gas is discharged in sequence through the arc-shaped guide pipe 62, the connecting pipe 61, the mounting cylinder 41 and the exhaust pipe 63, the reacted solution leaks to the bottom of the reaction cylinder body 11 under the filtration of the water filtering hole 46, and the solid impurities are collected in the collection box 54 through the cleaning of the cleaning brush 51.

[0059] S5: The solution at the bottom of the reaction cylinder body 11 is made to have the ability of desulfurization and denitrification again through the medicine in the recovery cylinder 91, and is pumped into the liquid storage cylinder 13 through the reflux pump 94 for subsequent desulfurization and denitrification, the vapor machine 15 at the top of the cooling cylinder 12 collects the vapor evaporated by the cooling water, the generator 16 is driven to generate electricity to supply electric energy to the exhaust pump 64 and the reflux pump 94.

[0060] The embodiments of the specific embodiment are the preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A flue gas desulfurization and denitrification device for a power plant, comprising a reaction cylinder (11), a cooling cylinder (12) provided at the upper end of the reaction cylinder (11), and a liquid storage cylinder (13) provided at the upper end of the cooling cylinder (12), characterized in that: A plurality of liquid supply pipes (14) are uniformly arranged around the side end of the reaction cylinder (11), and the upper ends of the liquid supply pipes (14) are connected to the interior of the liquid storage cylinder (13), and the lower ends are connected to the interior of the reaction cylinder (11). A reaction device (2) is arranged at the upper end of the interior of the reaction cylinder (11); The reaction device (2) includes a mounting tube (21) arranged at the lower end of the cooling cylinder (12), a plurality of circumferentially evenly arranged air guide tubes (22) are arranged at the side end of the mounting tube (21), a plurality of exhaust heads (23) are evenly arranged at the lower end of the air guide tube (22), a liquid supply ring (24) is installed on the side wall of the upper end of the reaction cylinder (11), and the liquid supply ring (24) is connected to the lower end of the liquid supply tube (14), and a plurality of circumferentially evenly arranged atomizing nozzles (25) are arranged on the inner side wall of the liquid supply ring (24).

2. The flue gas desulfurization and denitrification device for a power plant according to claim 1, characterized in that: A flow guide assembly (3) is further provided inside the reaction cylinder (11), and the flow guide assembly (3) comprises a first flow guide plate (31) installed inside the reaction cylinder (11), a flow guide hole (32) is provided in the middle of the first flow guide plate (31), and an upper end surface of the first flow guide plate (31) is inclined toward the flow guide hole (32).

3. The flue gas desulfurization and denitrification device for a power plant according to claim 2, characterized in that: Connecting columns (33) are evenly arranged around the side ends of the guide holes (32), and second guide plates (34) are respectively arranged at the upper and lower ends of the connecting columns (33), so that the first guide plates (31) and the second guide plates (34) are arranged alternately, and the upper end surfaces of the second guide plates (34) are inclined toward the periphery of the second guide plates (34), and a drainage eave (35) is provided on the outer side of the lower end of the second guide plate (34) at the lowest end.

4. The flue gas desulfurization and denitrification device for a power plant according to claim 1, characterized in that: A water filter device (4) is provided at the lower end of the reaction cylinder (11), and the water filter device (4) comprises a mounting cylinder (41) installed at the center of the bottom of the reaction cylinder (11), a mounting ring (42) is rotatably mounted on the upper end of the mounting cylinder (41), and a plurality of connecting arms (43) are evenly arranged around the circumference of the mounting ring (42).

5. The flue gas desulfurization and denitrification device for a power plant according to claim 4, characterized in that: A filter ring (44) is installed on one end of the connecting arm (43) away from the mounting ring (42). A filter groove (45) is provided on the upper end of the filter ring (44). The filter groove (45) is located directly below the drainage eaves (35). Water filter holes (46) are evenly provided on the bottom of the filter groove (45).

6. The flue gas desulfurization and denitrification device for a power plant according to claim 5, characterized in that: A collecting assembly (5) is provided at the bottom side of the reaction cylinder (11), and the collecting assembly (5) includes a cleaning brush (51) installed at one side of the lower end of the drainage eaves (35), and the cleaning brush (51) cooperates with the filter tank (45), and a collecting hole (52) is opened at one side of the bottom of the filter tank (45).

7. The power plant flue gas desulfurization and denitrification device according to claim 6, characterized in that: A collecting port (53) is provided on the side wall of the lower end of the reaction cylinder (11), and a collecting box (54) is slidably installed in the collecting port (53). The collecting box (54) is located directly below the cleaning brush (51), and a plurality of filter holes (55) are evenly provided on the bottom of the collecting box (54).

8. The flue gas desulfurization and denitrification device for a power plant according to claim 4, characterized in that: An exhaust assembly (6) is provided on the mounting cylinder (41), the exhaust assembly (6) comprising a connecting pipe (61) mounted on the upper end of the mounting ring (42), the connecting pipe (61) being connected to the mounting cylinder (41), a circumferentially evenly arranged arc-shaped guide pipe (62) being provided on the side wall of the connecting pipe (61), an exhaust pipe (63) being connected to the side wall of the mounting cylinder (41) and being connected to the interior of the mounting cylinder (41), and an exhaust pump (64) being connected in series to the exhaust pipe (63).

9. The flue gas desulfurization and denitrification device for a power plant according to claim 1, characterized in that: A cooling assembly (7) is provided in the cooling cylinder (12), and the cooling assembly (7) includes a water inlet pipe (71) installed at the upper end of the cooling cylinder (12) and connected to the interior of the cooling cylinder (12), and a water inlet valve (72) is connected in series on the water inlet pipe (71). A spiral cooling pipe (73) is provided in the cooling cylinder (12), and one end of the middle portion of the spiral cooling pipe (73) is connected to the installation pipe (21), and the other end of the spiral cooling pipe (73) is connected to the air inlet pipe (74), and the air inlet pipe (74) is located outside the reaction cylinder (11).

10. A method for desulfurization and denitrification of flue gas from a power plant, comprising the flue gas desulfurization and denitrification device for a power plant according to any one of claims 1 to 9, characterized in that: S1: The flue gas is passed into the air inlet pipe (74), and after filtering the flue gas, the flue gas is passed into the cooling cylinder (12) for cooling; S2: The filtered flue gas enters the spiral cooling tube (73) for cooling, and is then discharged into the reaction cylinder (11) through the exhaust head (23) on the air guide tube (22); S3: The atomizing nozzle (25) atomizes the reaction liquid in the liquid storage cylinder (13) and sprays it into the reaction cylinder (11), and reacts with the gas in the reaction cylinder (11) to desulfurize and denitrify; S4: The gas after the reaction is completed is discharged through the exhaust pipe (63), and the solution and impurities after the reaction are filtered by the filter ring (44) and then recovered separately.

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