A flue gas staged purification device for waste incineration power generation

Abstract

The utility model relates to incineration flue gas purification technical field, and disclose a kind of flue gas grading purification equipment for garbage incineration power generation, including reaction tower.The flue gas grading purification equipment for garbage incineration power generation, by starting drive motor drives to scatter blade high-speed rotation, concentrated original flue gas is scattered into small airflow, increase the contact area of flue gas and purification medium, avoid the problem of insufficient purification caused by local concentration too high;Air flow uniform distribution plate realizes flue gas uniform shunting by annular arrangement's through-hole, cooperate with the spiral flow guide vane in through-hole, guide flue gas along spiral trajectory re-converges into smooth airflow, effectively avoid turbulence phenomenon, provide stable working condition environment for subsequent each purification link, guarantee the sustained and stable purification efficiency;The flow guide plate of denitration processing stage can guide flue gas to denitration conical pipe concentration, improve the contact probability and contact time of denitration liquid and flue gas, enhance denitration reaction effect, reduce denitration liquid waste, reduce processing cost.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification technology, specifically a graded purification device for flue gas used in waste incineration power generation. Background Technology

[0002] Waste incineration is the most widely used waste treatment method. Waste incineration involves burning waste in an incinerator to release heat energy, which is then preheated and recovered for heating or power generation. Compared with other waste treatment methods, it has great advantages. However, the flue gas produced during waste incineration contains a large amount of harmful gases, which are currently mainly filtered through desulfurization towers and other equipment to meet standards before being released into the atmosphere.

[0003] However, waste incineration generates large quantities of complex and highly hazardous flue gas. This flue gas contains not only particulate matter (such as slag particles and PM2.5), but also harmful organic compounds such as sulfides, nitrogen oxides (NOx), heavy metals (such as mercury and lead), and dioxins. If these harmful flue gases are emitted directly without effective treatment, they will cause serious pollution to the atmospheric environment, threatening ecological balance and human health.

[0004] Currently, the industry mainly relies on single devices such as desulfurization towers to treat incineration flue gas. However, these devices have significant limitations: they can only filter one or a few types of pollutants in the flue gas, making it difficult to achieve comprehensive and in-depth purification of multiple pollutants. This makes it difficult to meet increasingly stringent flue gas emission standards. Furthermore, traditional equipment lacks a systematic approach to flue gas treatment, and problems such as excessively high local concentrations and unstable flow of flue gas within the equipment can easily occur, resulting in low purification efficiency and large fluctuations in treatment effects. Therefore, we propose a graded flue gas purification device for waste incineration power generation to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a graded purification device for flue gas incineration power generation, which solves the problems mentioned in the background art.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a flue gas grading and purification device for waste incineration power generation, including a reaction tower, wherein an exhaust pipe and an air inlet pipe are fixedly connected to the top and bottom of the reaction tower respectively, and a dispersing structure for dispersing flue gas and performing primary purification is provided inside the bottom of the reaction tower.

[0007] The dispersing structure includes a concave column and dispersing blades. The outer wall of the concave column is fixedly installed at the bottom of the inner wall of the reaction tower. A T-shaped cylindrical groove is formed on the inner wall of the bottom end of the concave column. A drive motor is fixedly installed inside the T-shaped cylindrical groove. The output end of the drive motor passes through the T-shaped cylindrical groove and extends into the bottom end of the concave column. Several dispersing blades are arranged in a ring and fixedly installed on the outer wall of the output end of the drive motor to disperse the flue gas introduced from the air inlet pipe. Eight purification tanks are arranged in a ring at the top of the concave column. An adsorbent filling layer is fixedly installed in each purification tank. A side exhaust pipe is fixedly connected to the side wall of the purification tank, and the bottom end of the side exhaust pipe is connected to the inner wall of the bottom end of the concave column to guide the dispersed flue gas into the purification tank from the side exhaust pipe. A detachable filter screen is movably installed inside the top end of the side exhaust pipe to intercept large dust particles.

[0008] Furthermore, an annular pipe is movably connected to the outer wall of the top of the concave column, and several nozzles corresponding to the purification tank are fixedly connected to the outer wall of the annular pipe for spraying purification liquid into the purification tank. The spraying direction of the nozzles is towards the adsorbent filling layer in the purification tank. A drain pipe connected to the purification tank is fixedly installed on the outer wall of the concave column. The output end of the drain pipe extends to the outside of the reaction tower, and a one-way valve is provided on the drain pipe.

[0009] Furthermore, the reaction tower is equipped with a flue gas recombination structure, which includes a fixed pipe. The outer wall of the fixed pipe is fixedly connected to the inner wall of the reaction tower. An octagonal connecting block is fixedly connected to the inner wall of the fixed pipe. The bottom end of each octagonal connecting block has several snap-fit ​​grooves. The bottom of the octagonal connecting block engages with the annular pipe through the snap-fit ​​grooves. An airflow distribution plate is fixedly connected to the top of the fixed pipe and the octagonal connecting block. The airflow distribution plate has several through holes arranged in a ring for uniformly diverting the flue gas that has passed through the dispersion structure. Spiral guide vanes are fixedly installed on the inner walls of several of the through holes to guide the diverted flue gas to reconverge and flow smoothly upward.

[0010] Furthermore, the inner wall of the reaction tower, above the flue gas recombination structure, is sequentially and fixedly connected to a catalytic decomposition layer, a high-efficiency filter bag layer, and a denitrification conical tube. The catalytic decomposition layer is filled with a catalyst for decomposing harmful organic matter in the flue gas. The high-efficiency filter bag layer is made of PTFE membrane filter material and is used to filter particulate matter in the flue gas. The top outer wall of the denitrification conical tube is fixedly connected to a guide plate via a fixed connecting rod. The guide plate is used to guide the flue gas to concentrate in the denitrification conical tube. The interior of the reaction tower is fixedly connected to a drain pipe on one side of the denitrification conical tube, and the output end of the drain pipe extends to the outside of the reaction tower. A one-way valve is provided on the drain pipe for discharging waste liquid in the reaction tower.

[0011] Furthermore, a main pipe is fixedly installed at the top of the inner wall of the reaction tower, and a number of nozzles are fixedly connected to the outer wall of the main pipe; a water pump is fixedly installed on the outer wall of the top of the reaction tower, and the outlet of the water pump is connected to the inside of the main pipe for supplying denitrification liquid to the nozzles; the inlet of the water pump is connected to an external denitrification liquid tank through an input pipe.

[0012] It also includes an online flue gas monitor, which is fixedly installed on the outer wall of the exhaust pipe and the detection end of the online flue gas monitor extends into the interior of the exhaust pipe, for real-time monitoring of the concentration of harmful gases and particulate matter in the purified flue gas.

[0013] Furthermore, it also includes a water tank and a water pump. The water tank is fixedly installed on the outer wall of the reaction tower. The inlet of the water pump is connected to the inside of the water tank through a pipe, and the outlet of the water pump is connected to the inside of the annular pipe through a connecting pipe.

[0014] The beneficial effects of this utility model are:

[0015] 1. This waste-to-energy flue gas grading and purification equipment uses a drive motor in the dispersing structure to rotate the dispersing blades at high speed, breaking down the concentrated raw flue gas into fine airflows. This increases the contact area between the flue gas and the purification medium, avoiding insufficient purification caused by excessively high local concentrations. The airflow distribution plate in the flue gas recombination structure achieves uniform flue gas distribution through annularly arranged through holes. Combined with the spiral guide vanes on the inner wall of the through holes, the flue gas is guided to re-converge into a stable airflow along a spiral trajectory, effectively avoiding turbulence and providing a stable operating environment for subsequent purification stages, ensuring continuous and stable purification efficiency. The guide plate in the denitrification stage can guide the flue gas to concentrate in the denitrification cone tube, increasing the contact probability and contact time between the denitrification liquid and the flue gas, enhancing the denitrification reaction effect, reducing denitrification liquid waste, and lowering treatment costs.

[0016] 2. This waste-to-energy incineration flue gas grading and purification equipment achieves precise and targeted removal of various pollutants in the flue gas through a grading process of "primary purification - deep purification - denitrification treatment":

[0017] Primary stage: With the help of the detachable filter screen in the dispersed structure, large particulate dust (such as slag particles) in the flue gas can be efficiently intercepted, with a removal efficiency of over 90%. At the same time, the adsorbent filling layer in the purification tank, together with the purification liquid (such as alkaline solution) sprayed by the nozzle, can effectively adsorb sulfides and some heavy metals in the flue gas, initially reducing the pollution load of the flue gas and laying the foundation for subsequent treatment.

[0018] In-depth: The catalyst in the catalytic decomposition layer can fully react with harmful organic compounds such as dioxins in the flue gas, decomposing them into harmless CO2 and H2O, with a removal rate of over 95% for harmful organic compounds; the high-efficiency filter bag layer uses PTFE membrane filter material, which has excellent interception effect on fine particulate matter in flue gas, with a filtration efficiency of over 99.9%, significantly reducing the concentration of particulate matter emissions.

[0019] Denitrification: The baffle plate guides the flue gas to concentrate in the denitrification cone tube. The denitrification liquid (such as ammonia) sprayed by the nozzle can fully react with the NOx in the flue gas to generate harmless N2 and H2O. The nitrogen oxide removal rate is stable at over 80%, meeting the stringent denitrification emission standards.

[0020] 3. The flue gas grading and purification equipment used for waste incineration power generation can monitor the concentration of harmful gases (such as SO2, NOx, and dioxins) and particulate matter content in the purified flue gas in real time through an online flue gas monitoring instrument installed on the exhaust pipe. The monitoring data can be directly fed back to the equipment control system. If the monitoring data does not meet the standards, the system can adjust the operating parameters in a timely manner (such as increasing the amount of denitrification liquid or prompting the replacement of the adsorbent) to ensure that the flue gas always meets the emission standards and avoids the problem of exceeding the emission standards due to the lag of manual monitoring. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0024] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0025] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0026] Figure 5 This is a cross-sectional view of the disassembled structure of this utility model;

[0027] Figure 6 This is a partial sectional view of the disintegration structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the disintegration structure of this utility model.

[0029] Explanation of reference numerals in the attached diagrams: 1. Reaction tower; 2. Exhaust pipe; 3. Inlet pipe; 4. Dispersing structure; 41. Concave column; 42. T-shaped cylindrical groove; 43. Drive motor; 44. Dispersing blades; 45. Purification tank; 46. Side drain pipe; 47. Filter screen; 48. Adsorbent packing layer; 49. Annular pipe; 410. Nozzle 1; 411. Drain pipe 1; 5. Flue gas recombination structure; 51. Fixed pipe; 52. Octagonal 53. Connecting block; 54. Snap-fit ​​groove; 55. Airflow distribution plate; 56. Through hole; 57. Spiral guide vane; 6. Catalytic decomposition layer; 7. High-efficiency filter bag layer; 8. Denitrification conical tube; 9. Connecting rod; 10. Guide plate; 11. Main pipe; 12. Nozzle II; 13. Water pump II; 14. Input pipe; 15. Drainage pipe II; 16. Water tank; 17. Water pump I; 18. Connecting pipe; 19. Flue gas online monitoring instrument. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1-7 A staged purification device for flue gas incineration power generation includes a reaction tower 1, which is a vertical cylindrical cavity. The top and bottom ends of the reaction tower 1 are respectively fixedly connected to an exhaust pipe 2 and an inlet pipe 3. The exhaust pipe 2 is used to discharge purified flue gas, and the inlet pipe 3 is used to introduce the original flue gas generated by waste incineration. The bottom end of the reaction tower 1 is provided with a dispersing structure 4 for dispersing the flue gas and performing primary purification.

[0032] The dispersing structure 4 includes a concave column 41 and dispersing blades 44. The dispersing blades 44 disperse the original flue gas to avoid excessively high local concentrations. The outer wall of the concave column 41 is fixedly installed at the bottom of the inner wall of the reaction tower 1. A T-shaped cylindrical groove 42 is formed on the inner wall of the bottom end of the concave column 41. A drive motor 43 is fixedly installed inside the T-shaped cylindrical groove 42. The output end of the drive motor 43 passes through the T-shaped cylindrical groove 42 and extends into the bottom end of the concave column 41. Several dispersing blades 44 are arranged in a ring and fixed on the outer wall of the output end of the drive motor 43 to disperse the flue gas from the inlet. The flue gas is introduced through pipe 3; the top of the concave column 41 is provided with eight purification tanks 45 arranged in a ring, and each purification tank 45 is fixedly installed with an adsorbent filling layer 48, such as an activated carbon layer, for primary adsorption of harmful substances; the side wall of the purification tank 45 is fixedly connected to a side exhaust pipe 46, and the bottom end of the side exhaust pipe 46 is connected to the bottom inner wall of the concave column 41, for introducing the dispersed flue gas into the purification tank 45 through the side exhaust pipe 46; a detachable filter screen 47 is movably installed inside the top of the side exhaust pipe 46 for intercepting large dust particles.

[0033] In this embodiment, the raw flue gas generated by waste incineration enters the bottom of the reaction tower 1 through the inlet pipe 3. The drive motor 43 is started, which drives the dispersing blades 44 to rotate at high speed, dispersing the concentrated flue gas into fine airflow, increasing the contact area with the subsequent purification medium. The filter screen 47 of the side exhaust pipe adopts a detachable design, which can be replaced without disassembling the entire dispersing structure 4, reducing maintenance time by 50%. The dispersed flue gas flows upward through the side exhaust pipe 46, first passing through the detachable filter screen 47, which intercepts large dust particles (such as slag particles) in the flue gas.

[0034] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, an annular pipe 49 is movably connected to the outer wall of the top of the concave column 41. Several nozzles 410 corresponding to the purification tank 45 are fixedly connected to the outer wall of the annular pipe 49. These nozzles are used to spray purification liquid into the purification tank 45. The spray direction of the nozzles 410 is towards the adsorbent filling layer 48 in the purification tank 45. The filtered flue gas enters the purification tank 45 and comes into contact with the adsorbent filling layer 48. The adsorbent adsorbs sulfides, some heavy metals and other harmful substances in the flue gas. The nozzles 410 spray purification liquid to enhance the adsorption effect. The adsorbent filling layer 48 adsorbs some harmful substances (such as sulfides) in the flue gas. A drain pipe 411 connected to the purification tank 45 is fixedly installed on the outer wall of the concave column 41. The output end of the drain pipe 411 extends to the outside of the reaction tower 1, and a one-way valve is provided on the drain pipe 411. The waste liquid generated by the primary purification is discharged outside the tower through the drain pipe 411 (the one-way valve prevents backflow).

[0035] In this embodiment, the equipment achieves precise and targeted removal of various pollutants in flue gas through a graded treatment process of "primary purification - deep purification - denitrification treatment":

[0036] Primary stage: With the help of the detachable filter screen in the dispersed structure, large particulate dust (such as slag particles) in the flue gas can be efficiently intercepted, with a removal efficiency of over 90%. At the same time, the adsorbent filling layer in the purification tank, together with the purification liquid (such as alkaline solution) sprayed by the nozzle, can effectively adsorb sulfides and some heavy metals in the flue gas, initially reducing the pollution load of the flue gas and laying the foundation for subsequent treatment.

[0037] In-depth: The catalyst in the catalytic decomposition layer can fully react with harmful organic compounds such as dioxins in the flue gas, decomposing them into harmless CO2 and H2O, with a removal rate of over 95% for harmful organic compounds; the high-efficiency filter bag layer uses PTFE membrane filter material, which has excellent interception effect on fine particulate matter in flue gas, with a filtration efficiency of over 99.9%, significantly reducing the concentration of particulate matter emissions.

[0038] Denitrification: The baffle plate guides the flue gas to concentrate in the denitrification cone tube. The denitrification liquid (such as ammonia) sprayed by the nozzle can fully react with the NOx in the flue gas to generate harmless N2 and H2O. The nitrogen oxide removal rate is stable at over 80%, meeting the stringent denitrification emission standards.

[0039] Reference Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the interior of the reaction tower 1 is equipped with a flue gas recombination structure 5. The flue gas recombination structure 5 includes a fixed pipe 51, the outer wall of which is fixedly connected to the inner wall of the reaction tower 1. An octagonal connecting block 52 is fixedly connected to the inner wall of the fixed pipe 51. Several snap-fit ​​grooves 53 are opened at the bottom of the octagonal connecting block 52. The bottom of the octagonal connecting block 52 is snap-fitted with the annular pipe 49 through the snap-fit ​​grooves 53. An airflow distribution plate 54 is fixedly connected to the top of the fixed pipe 51 and the octagonal connecting block 52. The through holes 55 of the airflow distribution plate 54 evenly distribute the flue gas after primary treatment. Several through holes 55 arranged in a ring are opened on the airflow distribution plate 54 for evenly distributing the flue gas after passing through the dispersion structure 4. Spiral guide vanes 56 are fixedly installed on the inner wall of several through holes 55 to guide the diverted flue gas to re-converge and flow smoothly upward, avoiding turbulence and ensuring that the flue gas flows smoothly upward, providing stable operating conditions for subsequent purification.

[0040] In this embodiment, the flue gas after primary purification enters the flue gas recombination structure 5 upwards and is evenly distributed through the through holes 55 on the airflow distribution plate 54 to avoid local accumulation of flue gas. The spiral guide vanes 56 on the inner wall of the through holes 55 guide the diverted flue gas to flow along the spiral trajectory, gradually converging into a stable airflow, and being transported upwards to the subsequent purification layer to ensure stable subsequent processing conditions.

[0041] Reference Figures 1-3As shown, the inner wall of the reaction tower 1, located above the flue gas recombination structure 5, is sequentially and fixedly connected to a catalytic decomposition layer 6, a high-efficiency filter bag layer 7, and a denitrification conical tube 8. The catalytic decomposition layer 6 is filled with a catalyst for decomposing harmful organic matter in the flue gas. The high-efficiency filter bag layer 7 is made of PTFE membrane filter material and is used to filter particulate matter in the flue gas. The top outer wall of the denitrification conical tube 8 is fixedly connected to a guide plate 10 via a connecting rod 9. The guide plate 10 is used to guide the flue gas to concentrate in the denitrification conical tube 8, improving the contact efficiency between the denitrification liquid and the flue gas. Inside the reaction tower 1, on one side of the denitrification conical tube 8, a drain pipe 15 is fixedly connected, and the output ends of the drain pipe 15 extend to the outside of the reaction tower 1. A one-way valve is provided on 15 for discharging waste liquid in reaction tower 1; a main pipe 11 is fixedly installed at the top of the inner wall of reaction tower 1, and several nozzles 12 are fixedly connected to the outer wall of the main pipe 11; a water pump 13 is fixedly installed on the outer wall of the top of reaction tower 1, and the outlet of the water pump 13 is connected to the inside of the main pipe 11 for supplying denitrification liquid to the nozzles 12. The inlet of the water pump 13 is connected to the external denitrification liquid tank through the input pipe 14; it also includes a flue gas online monitoring instrument 19, which is fixedly installed on the outer wall of the exhaust pipe 2, and the detection end of the flue gas online monitoring instrument 19 extends into the inside of the exhaust pipe 2 for real-time monitoring of the concentration of harmful gases and particulate matter in the purified flue gas.

[0042] In this embodiment, the stable airflow first enters the catalytic decomposition layer 6, where the catalyst reacts with harmful organic compounds (such as dioxins) in the flue gas, decomposing them into harmless CO2, H2O, etc. Subsequently, the flue gas enters the high-efficiency filter bag layer 7, where the PTFE membrane filter material traps fine particulate matter (PM2.5, heavy metal particles) in the flue gas, achieving deep particulate filtration. The filtered flue gas continues upward, and under the guidance of the guide plate 10 and the denitrification cone 8, it concentrates above the denitrification cone 8. The second water pump 13 is then activated, drawing denitrification liquid (such as ammonia) from the external denitrification liquid tank through the input pipe 14. The solution is delivered to the main pipe 11 and then evenly sprayed onto the outer wall of the denitrification conical pipe 8 through nozzle 12. The denitrification solution reacts with NOx in the flue gas to generate harmless N2 and H2O. The waste liquid generated by the denitrification reaction is discharged outside the tower through drain pipe 15 (controlled by a one-way valve). Finally, the purified flue gas is discharged through exhaust pipe 2. During the process, the flue gas online monitoring instrument 19 monitors the concentration of harmful gases (NOx, SO2, dioxins) and particulate matter in the flue gas in real time. If the monitoring data meets the standards, the emission continues. If the standards are not met, feedback is given to adjust the equipment operating parameters (such as increasing the amount of denitrification solution or replacing the adsorbent).

[0043] Reference Figure 1 , Figure 6 and Figure 7As shown, it also includes a water tank 16 and a water pump 17. The water tank 16 is fixedly installed on the outer wall of the reaction tower 1. The water inlet of the water pump 17 is connected to the inside of the water tank 16 through a pipe, and the water outlet of the water pump 17 is connected to the inside of the annular pipe 49 through a connecting pipe 18.

[0044] In this embodiment, the water tank 16 and the water pump 17 provide a stable supply of purified liquid to the nozzle 410 with a dispersing structure, ensuring the continuous effectiveness of primary purification.

[0045] During use, the flue gas is introduced and initially dispersed: the raw flue gas generated by waste incineration enters the bottom of the reaction tower 1 through the air inlet pipe 3, and the drive motor 43 is started to drive the dispersing blades 44 to rotate at high speed, which disperses the concentrated flue gas into fine airflow, increasing the contact area with the subsequent purification medium.

[0046] Primary purification: The dispersed flue gas flows upward through the side exhaust pipe 46, first passing through the detachable filter screen 47, which intercepts large dust particles (such as slag particles) in the flue gas; then the flue gas enters the purification tank 45 and comes into contact with the adsorbent filling layer 48 in the tank. The adsorbent adsorbs sulfides, some heavy metals and other harmful substances in the flue gas; at the same time, the water pump 17 is started to transport the purification liquid (such as alkaline solution) in the water tank 16 to the annular pipe 49 through the connecting pipe 18, and then accurately sprayed onto the adsorbent filling layer through the nozzle 410 to enhance the adsorption effect; the waste liquid generated by the primary purification is discharged outside the tower through the drain pipe 411 (with a one-way valve to prevent backflow).

[0047] Flue gas flow equalization and stabilization: After primary purification, the flue gas enters the flue gas recombination structure 5 upwards and is evenly distributed through the through holes 55 on the airflow distribution plate 54 to avoid local accumulation of flue gas; the spiral guide vanes 56 on the inner wall of the through holes 55 guide the diverted flue gas to flow along the spiral trajectory, gradually converge into a stable airflow, and be transported upwards to the subsequent purification layer to ensure the stability of subsequent treatment conditions.

[0048] Deep purification: The stable airflow first enters the catalytic decomposition layer 6, where the catalyst reacts with harmful organic compounds (such as dioxins) in the flue gas, decomposing them into harmless CO2, H2O, etc.; then the flue gas enters the high-efficiency filter bag layer 7, where the PTFE membrane filter material intercepts fine particulate matter (PM2.5, heavy metal particles) in the flue gas, achieving deep filtration of particulate matter.

[0049] Denitrification treatment and waste liquid discharge: The filtered flue gas continues to rise and is concentrated above the denitrification cone 8 under the guidance of the guide plate 10 and the denitrification cone 8; the water pump 13 is started to transport the denitrification liquid (such as ammonia water) in the external denitrification liquid tank to the main pipe 11 through the input pipe 14, and then sprayed evenly on the outer wall of the denitrification cone 8 through the nozzle 12. The denitrification liquid reacts with NOx in the flue gas to generate harmless N2 and H2O; the waste liquid generated by the denitrification reaction is discharged outside the tower through the drain pipe 15 (controlled by a one-way valve).

[0050] Monitoring and compliance with emission standards: The final purified flue gas is discharged through exhaust pipe 2. During the process, the flue gas online monitoring instrument 19 monitors the concentration of harmful gases (NOx, SO2, dioxins) and particulate matter in the flue gas in real time. If the monitoring data meets the standards, the emission continues. If the standards are not met, feedback is provided to adjust the equipment operating parameters (such as increasing the amount of denitrification liquid or replacing the adsorbent).

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A staged purification device for flue gas from waste incineration power generation, comprising a reaction tower (1), characterized in that: The top and bottom of the reaction tower (1) are respectively connected to an exhaust pipe (2) and an air inlet pipe (3). The bottom of the reaction tower (1) is provided with a dispersing structure (4) for dispersing flue gas and performing primary purification. The dispersing structure (4) includes a concave column (41) and dispersing blades (44). The outer wall of the concave column (41) is fixedly installed at the bottom of the inner wall of the reaction tower (1). A T-shaped cylindrical groove (42) is formed on the inner wall of the bottom end of the concave column (41). A drive motor (43) is fixedly installed inside the T-shaped cylindrical groove (42). The output end of the drive motor (43) passes through the T-shaped cylindrical groove (42) and extends to the bottom end of the concave column (41). Several dispersing blades (44) are arranged in a ring and fixed on the outer wall of the output end of the drive motor (43) for dispersing the particles from the reaction tower (1). The flue gas introduced by the air inlet pipe (3); the top of the concave column (41) is provided with eight purification tanks (45) arranged in a ring, each of the purification tanks (45) is fixedly installed with an adsorbent filling layer (48), the side wall of the purification tank (45) is fixedly connected with a side exhaust pipe (46), and the bottom end of the side exhaust pipe (46) is connected to the bottom inner wall of the concave column (41) for introducing the dispersed flue gas into the purification tank (45) through the side exhaust pipe (46), and a detachable filter screen (47) is movably installed inside the top of the side exhaust pipe (46) for intercepting large dust particles.

2. The graded purification equipment for flue gas incineration power generation according to claim 1, characterized in that: The outer wall of the top of the concave column (41) is movably connected to an annular pipe (49). The outer wall of the annular pipe (49) is fixedly connected to several nozzles (410) corresponding to the purification tank (45), which are used to spray purification liquid into the purification tank (45). The spraying direction of the nozzles (410) is towards the adsorbent filling layer (48) in the purification tank (45). The outer wall of the concave column (41) is fixedly installed with a drain pipe (411) connected to the purification tank (45). The output end of the drain pipe (411) extends to the outside of the reaction tower (1), and a one-way valve is provided on the drain pipe (411).

3. The graded purification equipment for flue gas incineration power generation according to claim 2, characterized in that: The reaction tower (1) is equipped with a flue gas recombination structure (5). The flue gas recombination structure (5) includes a fixed pipe (51). The outer wall of the fixed pipe (51) is fixedly connected to the inner wall of the reaction tower (1). An octagonal connecting block (52) is fixedly connected to the inner wall of the fixed pipe (51). Several snap-fit ​​grooves (53) are opened at the bottom of the octagonal connecting block (52). The bottom of the octagonal connecting block (52) is snap-fitted to the annular pipe (49) through the snap-fit ​​grooves (53). An airflow distribution plate (54) is fixedly connected to the top of the fixed pipe (51) and the octagonal connecting block (52). Several through holes (55) arranged in a ring are opened on the airflow distribution plate (54) for uniformly diverting the flue gas that has passed through the dispersion structure (4). Spiral guide vanes (56) are fixedly installed on the inner wall of several through holes (55) for guiding the diverted flue gas to re-converge and flow smoothly upward.

4. The graded purification equipment for flue gas incineration power generation according to claim 1, characterized in that: The inner wall of the reaction tower (1) is located above the flue gas recombination structure (5) and is sequentially fixedly connected to a catalytic decomposition layer (6), a high-efficiency filter bag layer (7), and a denitrification conical tube (8). The catalytic decomposition layer (6) is filled with a catalyst for decomposing harmful organic matter in the flue gas. The high-efficiency filter bag layer (7) is made of PTFE membrane filter material and is used to filter particulate matter in the flue gas. The top outer wall of the denitrification conical tube (8) is fixedly connected to a guide plate (10) through a fixed connecting rod (9). The guide plate (10) is used to guide the flue gas to concentrate in the denitrification conical tube (8). The interior of the reaction tower (1) is fixedly connected to a drain pipe (15) on one side of the denitrification conical tube (8). The output end of the drain pipe (15) extends to the outside of the reaction tower (1). The drain pipe (15) is equipped with a one-way valve for discharging waste liquid in the reaction tower (1).

5. The graded purification equipment for flue gas incineration power generation according to claim 1, characterized in that: The top of the inner wall of the reaction tower (1) is fixedly installed with a main pipe (11), and the outer wall of the main pipe (11) is fixedly connected with several nozzles (12); the top outer wall of the reaction tower (1) is fixedly installed with a water pump (13), the outlet of the water pump (13) is connected to the inside of the main pipe (11) for conveying denitrification liquid to the nozzles (12), and the inlet of the water pump (13) is connected to the external denitrification liquid tank through the input pipe (14); It also includes an online flue gas monitor (19), which is fixedly installed on the outer wall of the exhaust pipe (2) and the detection end of the online flue gas monitor (19) extends into the interior of the exhaust pipe (2) for real-time monitoring of the concentration of harmful gases and particulate matter in the purified flue gas.

6. The graded purification equipment for flue gas incineration power generation according to claim 2, characterized in that, It also includes a water tank (16) and a water pump (17). The water tank (16) is fixedly installed on the outer wall of the reaction tower (1). The inlet of the water pump (17) is connected to the inside of the water tank (16) through a pipe. The outlet of the water pump (17) is connected to the inside of the annular pipe (49) through a connecting pipe (18).

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