A flue gas desulfurization, denitrification, dust removal and demisting device at the same time

Abstract

The present invention discloses a device for simultaneously desulfurizing, denitrifying, dust-removing and fog-removing flue gas, which relates to the technical field of flue gas treatment equipment and includes a desulfurization tower body. A flue gas pipeline is fixedly communicated with the outer surface of the lower end of the desulfurization tower body, and a filter plate is arranged inside the flue gas pipeline. It also includes: an inner wall cleaning mechanism and an intelligent control system, and the inner wall cleaning mechanism is arranged inside the flue gas pipeline. Through the setting of the inner wall cleaning mechanism, while the scraper cleans the inner wall of the flue gas pipeline, the cleaning plate can be attached to the surface of the filter plate and make a circular motion with the center of the filter plate as the axis, so as to synchronously clean and remove the attachments on the surface of the filter plate. Different from the traditional cleaning method, this design combines the rotational transmission of the screw rod and the meshing transmission of the linkage gear and the driven gear ring to form a composite transmission mechanism. This design not only improves the accuracy and comprehensiveness of cleaning, but also enhances the stability and reliability during the cleaning process.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment equipment, and specifically relates to a device for simultaneously desulfurizing, denitrifying, dust-removing and demisting flue gas. Background Art

[0002] In the process of simultaneously desulfurizing, denitrifying, dust-removing and demisting flue gas, relevant desulfurization tower equipment is often involved. As a key component for transmitting flue gas in the desulfurization tower equipment, the inner wall of the flue gas pipeline often accumulates dust, oil stains and other impurities due to long-term operation. The long-term adhesion of these attachments will not only reduce the smoothness of flue gas flow and increase the air flow resistance, but also have an adverse impact on the stability and reliability of the flue gas treatment system.

[0003] A filter plate structure is usually installed in the flue gas pipeline to filter the incoming flue gas. However, traditional cleaning methods often neglect the cleaning of the filter plate. As an important part of the flue gas treatment system, after long-term use, dust, oil stains and other impurities are likely to accumulate on its surface. These attachments will not only reduce the filtration efficiency, but also damage the filter plate and shorten its service life. Most of the existing cleaning methods can only clean the flue gas pipeline or the filter plate separately, and cannot achieve synchronous cleaning. This not only increases the complexity and time cost of the cleaning work, but also may cause a decline in system performance or potential safety hazards due to untimely or incomplete cleaning.

[0004] Therefore, in view of this, the present invention proposes a device for simultaneously desulfurizing, denitrifying, dust-removing and demisting flue gas to make up for and improve the deficiencies of the existing technology. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a device for simultaneously desulfurizing, denitrifying, dust-removing and demisting flue gas to solve the corresponding technical problems raised in the above background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a device for simultaneously desulfurizing, denitrifying, dust-removing and demisting flue gas, including a desulfurization tower body. The outer surface of the lower end of the desulfurization tower body is fixedly communicated with a flue gas pipeline. A filter plate is arranged inside the flue gas pipeline. The device also includes an inner wall cleaning mechanism and an intelligent control system, and the inner wall cleaning mechanism is arranged inside the flue gas pipeline.

[0007] The inner wall cleaning mechanism includes a mounting ring, a scraper and a screw rod. The mounting ring is arranged inside the flue gas pipeline. The scraper is in contact with the inner wall of the flue gas pipeline. The screw rod is arranged through the upper end of the mounting ring.

[0008] The intelligent control system includes a data acquisition unit, a data processing unit, a prediction and analysis unit and an execution unit.

[0009] The data acquisition unit is connected to the data processing unit, the data processing unit is connected to the prediction and analysis unit, and the prediction and analysis unit is connected to the execution unit;

[0010] The data acquisition unit includes a sensor monitoring module and a data acquisition module. The sensor monitoring module is used to obtain flue gas induction data during the process of flue gas entering the flue gas pipeline through a group of flue gas sensors arranged at the inlet of the flue gas pipeline, and send the flue gas induction data to the data processing unit;

[0011] The data acquisition module is used to obtain the historical cleaning date and historical cleaning cycle from the database and send them to the data processing unit;

[0012] The data processing unit is used to perform standardization processing on the flue gas induction data and send it to the prediction and analysis unit;

[0013] The prediction and analysis unit is used to calculate the basic cleaning cycle based on the historical cleaning cycle, and then calculate the dynamic correction factor in combination with the standardized flue gas induction data to generate the final prediction cycle, divide the cleaning stage, generate a cleaning instruction and send it to the execution unit;

[0014] The execution unit is used to start the operation of the inner wall cleaning mechanism according to the cleaning instruction, and update the historical cleaning date and historical cleaning cycle in the database.

[0015] Preferably, the scraper is fixedly connected to the outer surface of one end of the mounting ring away from the desulfurization tower body. Both ends of the screw rod are symmetrically and rotatably connected to fixing plates, and the fixing plates are fixedly connected to the upper inner wall of the flue gas pipeline. The mounting ring is fixedly connected to the outer surface of the filter plate. The mounting ring is threadedly connected to the screw rod. Symmetrically fixed connection annular corrugated plates are arranged between the mounting ring and the fixing plates, and the annular corrugated plates cover the outside of the screw rod.

[0016] Preferably, a first receiving groove and a second receiving groove are sequentially formed from top to bottom at one end of the mounting ring away from the desulfurization tower body, and the first receiving groove is communicated with the second receiving groove. A linkage gear is slidably connected in the first receiving groove, and the linkage gear is sleeved on the outer surface of the screw rod. A sliding bead is fixedly connected to the inner surface of the linkage gear, and the sliding bead is slidably connected to a spiral groove formed on the outer surface of the screw rod.

[0017] Preferably, a driven tooth ring is slidably connected in the second receiving groove, and the driven tooth ring is meshed with the linkage gear. A fixing column is fixedly connected to one side of the driven tooth ring away from the desulfurization tower body. A cleaning plate is fixedly connected to the outer surface of the fixing column, and the cleaning plate is in contact with the surface of the filter plate away from the desulfurization tower body.

[0018] Preferably, the flue gas sensor group includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor, and a nitrogen oxide sensor, and the flue gas induction data includes the flow rate , temperature , sulfur dioxide concentration , and nitrogen oxide concentration .

[0019] Preferably, the specific process of the data processing unit for standardizing the flue gas induction data is as follows:

[0020] S101. Normalize the flow rate , temperature , sulfur dioxide concentration , and nitrogen oxide concentration . The formula is: flow rate ratio , temperature ratio , sulfur dioxide concentration ratio , and nitrogen oxide concentration ratio ;

[0021] Among them, is the maximum flow rate safety threshold allowed for the flue gas pipeline;

[0022] is the maximum temperature safety threshold allowed for the flue gas pipeline;

[0023] is the maximum sulfur dioxide concentration safety threshold allowed for the flue gas pipeline;

[0024] is the maximum nitrogen oxide concentration safety threshold allowed for the flue gas pipeline;

[0025] S102. Match the flue gas induction data with the historical cleaning cycle according to the time stamp.

[0026] Preferably, the specific process of generating the final prediction cycle is as follows:

[0027] S201. According to the historical cleaning cycle, use the weighted moving average method to calculate the basic cleaning cycle . The formula is: . Among them, is the i-th historical cleaning cycle from the bottom, is the preset weight coefficient and satisfies ;

[0028] S202. According to the flue gas induction data after standardization, sum the standardized ratio values weighted by weights to calculate the dynamic correction factor . The formula is: . The dynamic correction factor For quantifying the current health status of a flue gas pipeline, the dynamic correction factor has a range of: ;

[0029] That is, when is closer to 0, it indicates that the load of the flue gas pipeline is light and the cleaning requirement is low;

[0030] When is closer to 1, it indicates that the load of the flue gas pipeline is heavy and immediate cleaning is required;

[0031] Among them, is a preset flow rate weight coefficient;

[0032] is a preset temperature weight coefficient;

[0033] is a preset sulfur dioxide concentration weight coefficient;

[0034] is a preset nitrogen oxide concentration weight coefficient, and it satisfies and ;

[0035] S203. According to the basic cleaning cycle , combined with the dynamic correction factor , calculate the final predicted cycle , and its formula is: .

[0036] Preferably, the final predicted cycle is specifically divided into three cleaning stages, and specifically divided into the first cleaning stage, the second cleaning stage, and the third cleaning stage according to the priority order. The stage division rules are as follows:

[0037] First cleaning stage: When and , generate a recommended cleaning instruction and execute it;

[0038] Second cleaning stage: When or , generate a delayed cleaning instruction and execute it;

[0039] Third cleaning stage: When or , generate a forced cleaning instruction and execute it;

[0040] Among them, , , and are all preset threshold parameters, and .

[0041] Preferably, after the inner wall cleaning mechanism finishes cleaning the inner wall of the flue gas pipeline, the actual cleaning date and actual cleaning cycle data are transmitted back to the database through the execution unit to complete the online update of the data.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] (1) Through the setting of the inner wall cleaning mechanism, by using the lateral drive of the screw rod on the mounting ring and cooperating with the design of the scraper, the scraper can be driven to fit the inner wall of the flue gas pipeline for synchronous lateral movement, effectively scraping off the dust, oil stains and impurities attached to the inner wall of the flue gas pipeline, which helps to maintain the smooth flow of flue gas, reduce the airflow resistance caused by dirt, and thus improve the stability and reliability of the entire flue gas treatment system. By using the setting of the sliding beads and cooperating with the transmission between the linkage gear and the driven gear ring, while the scraper cleans the inner wall of the flue gas pipeline, the cleaning plate can be made to fit the surface of the filter plate and perform a circular motion around the center of the filter plate to synchronously clean and remove the attachments on the surface of the filter plate. Different from the traditional cleaning method, this design combines the rotational drive of the screw rod with the meshing drive of the linkage gear and the driven gear ring to form a composite drive mechanism. This design not only improves the accuracy and comprehensiveness of cleaning, but also enhances the stability and reliability during the cleaning process;

[0044] Moreover, through the contact design between the cleaning plate and the filter plate, the self-cleaning of the filter plate can be realized synchronously while cleaning the inner wall of the flue gas pipeline, which not only reduces the need for manual cleaning, but also improves the overall cleanliness and working efficiency of the equipment;

[0045] Among them, through the design of the annular corrugated plate, the screw rod can be protected, effectively preventing impurities, oil stains and dust in the flue gas from adhering to the outer surface of the screw rod and affecting the subsequent use of the screw rod, thus ensuring the stable operation and cleaning effect of the inner wall cleaning mechanism.

[0046] (2) By obtaining various flue gas induction data and performing standardized processing, calculating the basic cleaning cycle according to the historical cleaning cycle, combining the standardized flue gas induction data, calculating the dynamic correction factor, quantifying the current health status of the flue gas pipeline, generating the final prediction cycle, dividing the final prediction cycle into multiple cleaning stages, comparing the data according to the stage division rules, analyzing the cleaning requirements of the current flue gas pipeline, and generating the corresponding cleaning instructions to be sent to the execution unit. After the execution unit controls the start of the inner wall cleaning mechanism to clean the inner wall of the flue gas pipeline, the cleaning cycle can be dynamically adjusted according to the actual health status of the flue gas pipeline, avoiding unnecessary frequent cleaning or untimely cleaning, and ensuring the pertinence and effectiveness of the cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 Schematic diagram of the overall structure of a preferred embodiment shown in the present invention;

[0048] Figure 2 Schematic diagram of the internal structure of the flue gas pipeline shown in the present invention;

[0049] Figure 3 Schematic diagram of the structure at the connection of the mounting ring shown in the present invention;

[0050] Figure 4 Schematic diagram of the split structure of the screw rod, linkage gear and driven gear ring shown in the present invention;

[0051] Figure 5 Schematic diagram of the intelligent control system structure shown in the present invention.

[0052] The reference numerals in the figure are:

[0053] 1. Desulfurization tower body; 2. Flue gas pipeline; 3. Filter plate;

[0054] 4. Inner wall cleaning mechanism; 401. Mounting ring; 402. Scraper; 403. First receiving groove; 404. Second receiving groove; 405. Linkage gear; 406. Slide bead; 407. Driven gear ring; 408. Fixed column; 409. Cleaning plate; 410. Fixed plate; 411. Screw rod; 412. Annular corrugated plate. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] Embodiment 1 of the present invention:

[0057] Please refer to Figures 1 to 4 As shown, a flue gas desulfurization, denitrification, dust removal and demisting device includes a desulfurization tower body 1. The lower outer surface of the desulfurization tower body 1 is fixedly connected and communicated with a flue gas pipeline 2. A filter plate 3 is arranged inside the flue gas pipeline 2. It further includes: an inner wall cleaning mechanism 4 and an intelligent control system, and the inner wall cleaning mechanism 4 is arranged inside the flue gas pipeline 2;

[0058] The inner wall cleaning mechanism 4 includes a mounting ring 401, a scraper 402 and a screw rod 411. The mounting ring 401 is arranged inside the flue gas pipeline 2. The scraper 402 is in contact with the inner wall of the flue gas pipeline 2. The screw rod 411 is disposed through the upper end of the mounting ring 401;

[0059] The scraping plate 402 is fixedly connected to the outer surface of one end of the mounting ring 401 away from the desulfurization tower body 1. Both ends of the screw rod 411 are symmetrically and rotatably connected with fixing plates 410, and one end of the screw rod 411 penetrates through the fixing plate 410 and is fixedly connected to the output end of an external driving source (driving motor). The fixing plate 410 is fixedly connected to the inner wall of the upper end of the flue gas pipeline 2. The mounting ring 401 is fixedly connected to the outer surface of the filter plate 3. The mounting ring 401 is threadedly connected to the outer surface of the screw rod 411. Symmetrically fixed connection annular corrugated plates 412 are arranged between the mounting ring 401 and the fixing plate 410, and the annular corrugated plates 412 cover the outside of the screw rod 411. The arranged annular corrugated plates 412 are used to protect the screw rod 411, avoiding that during the process of flue gas entering the desulfurization tower body 1, the flue gas contacts the outer surface of the screw rod 411, so that impurities, oil stains and dust in the flue gas adhere to the spiral grooves formed on the outer surface of the screw rod 411, affecting the subsequent use of the spiral grooves;

[0060] The mounting ring 401 away from the desulfurization tower body 1 is successively provided with a first receiving groove 403 and a second receiving groove 404 from top to bottom, and the first receiving groove 403 communicates with the second receiving groove 404. A linkage gear 405 is slidably connected in the first receiving groove 403, and the linkage gear 405 is sleeved on the outer surface of the screw rod 411. A sliding bead 406 is fixedly connected to the inner surface of the linkage gear 405, and the sliding bead 406 is slidably connected to the spiral groove formed on the outer surface of the screw rod 411;

[0061] A driven gear ring 407 is slidably connected in the second receiving groove 404, and the driven gear ring 407 is meshed with the linkage gear 405. A fixing column 408 is fixedly connected to the side of the driven gear ring 407 away from the desulfurization tower body 1. A cleaning plate 409 is fixedly connected to the outer surface of the fixing column 408, and the cleaning plate 409 contacts the surface of the filter plate 3 away from the desulfurization tower body 1.

[0062] Please refer to Figure 2 、 Figure 3 and Figure 4, preferably: a spiral groove is formed on the outer surface of the screw rod 411, the linkage gear 405 is slidably arranged on the mounting ring 401 through the first receiving groove 403, and the linkage gear 405 is movably sleeved on the outer surface of the screw rod 411. A sliding bead 406 is fixedly arranged on the inner surface of the linkage gear 405, and the sliding bead 406 is slidably arranged in the spiral groove formed on the outer surface of the screw rod 411. One end of the screw rod 411 penetrates through the fixing plate 410 and is fixedly connected to the output end of an external driving motor. When cleaning the inner wall of the flue gas duct 2, by starting the external driving motor, the screw rod 411 can be driven to rotate between the two fixing plates 410. At this time, since the mounting ring 401 is threadedly connected to the screw rod 411, the mounting ring 401 can be driven to move horizontally under the rotation of the screw rod 411. Through the cooperation between the sliding bead 406 and the spiral groove formed on the outer surface of the screw rod 411, while the screw rod 411 rotates and drives the mounting ring 401 to move, the linkage gear 405 can synchronously move horizontally and slide and rotate in the first receiving groove 403 on the basis of the horizontal movement. Thus, through the meshing connection relationship, the driven gear ring 407 arranged below is driven to rotate in the second receiving groove 404.

[0063] The following is the working process of the inner wall cleaning mechanism 4 for cleaning the inner wall of the flue gas duct 2:

[0064] When cleaning the inner wall of the flue gas duct 2, as Figure 2 , Figure 3 and Figure 4 shown, since two fixing plates 410 are fixedly connected to the upper inner wall of the flue gas duct 2, and a screw rod 411 is rotatably arranged between the two fixing plates 410, and one end of the screw rod 411 penetrates through the fixing plate 410 and is fixedly connected to the output end of an external driving motor. Therefore, when starting the external driving motor to operate and clean the inner wall of the flue gas duct 2, the screw rod 411 can be driven to rotate between the two fixing plates 410. Since the outer surface of the screw rod 411 is provided with spiral grooves as Figure 3 and Figure 4 shown, the screw rod 411 is threadedly connected to the upper end of the mounting ring 401, and a scraping plate 402 is fixedly arranged on the outer surface of one end of the mounting ring 401 away from the desulfurization tower body 1, and the scraping plate 402 is in contact with the inner wall of the flue gas duct 2. Therefore, through the restriction of the scraping plate 402, the mounting ring 401 can be driven by the screw rod 411 and simultaneously move horizontally inside the flue gas duct 2. By using the provided scraping plate 402, while the mounting ring 401 moves horizontally, the dust, oil stains and impurities attached to the inner wall of the flue gas duct 2 are scraped off;

[0065] Furthermore, as Figure 3 and Figure 4As shown in the figure, since the mounting ring 401 is provided with a first receiving groove 403 and a second receiving groove 404 from top to bottom in sequence, and a linkage gear 405 is slidably connected in the first receiving groove 403, and the linkage gear 405 is coaxially movably sleeved on the outer surface of the screw rod 411. Specifically, a sliding bead 406 is fixedly arranged on the inner surface of the linkage gear 405, and the sliding bead 406 is slidably connected with the spiral groove formed on the outer surface of the screw rod 411. Therefore, when the screw rod 411 rotates to drive the mounting ring 401 to move horizontally inside the flue gas duct 2, while scraping off the dust, oil stains and impurities adhering to the inner wall of the flue gas duct 2, it drives the linkage gear 405 to move horizontally synchronously. By using the sliding fit between the sliding bead 406 and the spiral groove, the linkage gear 405 can slide and rotate synchronously in the first receiving groove 403 while following the horizontal movement of the mounting ring 401. Also, since a driven gear ring 407 is slidably connected in the second receiving groove 404, and the second receiving groove 404 is communicated with the first receiving groove 403, and the driven gear ring 407 is meshed and arranged below the linkage gear 405. Therefore, when the linkage gear 405 rotates, it can synchronously drive the driven gear ring 407 to slide and rotate inside the second receiving groove 404. And since a fixing column 408 is fixedly arranged on the side of the driven gear ring 407 away from the desulfurization tower body 1, and a cleaning plate 409 in contact with the surface of the filter plate 3 is fixedly arranged on the outer surface of the fixing column 408. Therefore, when the linkage gear 405 drives the driven gear ring 407 to rotate, the cleaning plate 409 can be driven to move synchronously in a circular motion, cleaning the surface of the filter plate 3, thus realizing self-cleaning while cleaning the inner wall of the flue gas duct 2.

[0066] Through the setting of the inner wall cleaning mechanism 4, by using the horizontal drive of the screw rod 411 on the mounting ring 401 and cooperating with the design of the scraping plate 402, the scraping plate 402 can be driven to fit the inner wall of the flue gas duct 2 and move horizontally synchronously, effectively scraping off the dust, oil stains and impurities adhering to the inner wall of the flue gas duct 2, which helps to maintain the smoothness of the flue gas flow, reduce the air flow resistance caused by dirt, and thus improve the stability and reliability of the entire flue gas treatment system.

[0067] By using the setting of the sliding bead 406 and cooperating with the transmission between the linkage gear 405 and the driven gear ring 407, while the scraping plate 402 cleans the inner wall of the flue gas duct 2, the cleaning plate 409 can be made to fit the surface of the filter plate 3 and move in a circular motion with the center of the filter plate 3 as the axis, synchronously cleaning and removing the attachments on the surface of the filter plate 3. Different from the traditional cleaning method, this design combines the rotational drive of the screw rod 411 and the meshing drive of the linkage gear 405 and the driven gear ring 407 to form a compound drive mechanism. This design not only improves the accuracy and comprehensiveness of cleaning, but also enhances the stability and reliability during the cleaning process.

[0068] Moreover, through the contact design between the cleaning plate 409 and the filter plate 3, while cleaning the inner wall of the flue gas duct 2, self-cleaning of the filter plate 3 can be synchronously achieved, which not only reduces the need for manual cleaning but also improves the overall cleanliness and working efficiency of the equipment;

[0069] Among them, through the design of the annular corrugated plate 412, the spiral rod 411 can be protected, effectively preventing impurities, oil stains, and dust in the flue gas from adhering to the outer surface of the spiral rod 411, affecting the subsequent use of the spiral rod 411, thereby ensuring the stable operation and cleaning effect of the inner wall cleaning mechanism 4.

[0070] Embodiment II of the present invention:

[0071] Please refer to Figure 5 As shown, a flue gas desulfurization, denitrification, dust removal, and demisting device further includes an intelligent control system;

[0072] The intelligent control system includes a data acquisition unit, a data processing unit, a prediction and analysis unit, and an execution unit;

[0073] The data acquisition unit is connected to the data processing unit, the data processing unit is connected to the prediction and analysis unit, and the prediction and analysis unit is connected to the execution unit;

[0074] The data acquisition unit includes a sensor monitoring module and a data acquisition module. The sensor monitoring module is used to obtain flue gas induction data during the process of the flue gas entering the flue gas duct 2 through a flue gas sensor group arranged at the inlet of the flue gas duct 2, and send the flue gas induction data to the data processing unit;

[0075] The data acquisition module is used to obtain the historical cleaning date and historical cleaning cycle from the database and send them to the data processing unit;

[0076] The data processing unit is used to perform standardized processing on the flue gas induction data and send it to the prediction and analysis unit;

[0077] The prediction and analysis unit is used to calculate the basic cleaning cycle based on the historical cleaning cycle, and then calculate the dynamic correction factor in combination with the standardized flue gas induction data , so as to generate the final prediction cycle, divide the cleaning stage, generate a cleaning instruction, and send it to the execution unit;

[0078] The execution unit is used to start the operation of the inner wall cleaning mechanism 4 according to the cleaning instruction and update the historical cleaning date and historical cleaning cycle in the database.

[0079] The flue gas sensor group includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor, and a nitrogen oxide sensor. The flue gas induction data includes the flow rate , temperature , sulfur dioxide concentration and nitrogen oxide concentration .

[0080] The specific process of the data processing unit for standardizing the flue gas induction data is as follows:

[0081] S101. Normalize the flow rate , temperature , sulfur dioxide concentration and nitrogen oxide concentration . The formula is: flow rate ratio , temperature ratio , sulfur dioxide concentration ratio and nitrogen oxide concentration ratio ;

[0082] Among them, is the maximum flow rate safety threshold allowed for flue gas duct 2;

[0083] is the maximum temperature safety threshold allowed for flue gas duct 2;

[0084] is the maximum sulfur dioxide concentration safety threshold allowed for flue gas duct 2;

[0085] is the maximum nitrogen oxide concentration safety threshold allowed for flue gas duct 2;

[0086] S102. Match the flue gas induction data with the historical cleaning cycle according to the time stamp.

[0087] The specific process of generating the final prediction cycle is as follows:

[0088] S201. According to the historical cleaning cycle, use the weighted moving average method to calculate the basic cleaning cycle . The formula is: . Among them, is the i-th historical cleaning cycle from the bottom, is the preset weight coefficient and satisfies ;

[0089] S202. According to the standardized flue gas induction data, sum the standardized ratio values weighted by weight to calculate the dynamic correction factor . The formula is: . The dynamic correction factor is used to quantify the current health status of flue gas duct 2. The range of the dynamic correction factor is: ;

[0090] That is, when The closer it is to 0, the lighter the load on the flue gas pipeline 2 and the lower the cleaning requirement;

[0091] When The closer it is to 1, the heavier the load on the flue gas pipeline 2 and immediate cleaning is required;

[0092] Among them, is a preset flow velocity weighting coefficient;

[0093] is a preset temperature weighting coefficient;

[0094] is a preset sulfur dioxide concentration weighting coefficient;

[0095] is a preset nitrogen oxide concentration weighting coefficient, and it satisfies and ;

[0096] S203. According to the basic cleaning cycle , combined with the dynamic correction factor , calculate the final predicted cycle , and its formula is: .

[0097] The final predicted cycle is specifically divided into three cleaning stages, and according to the priority order, it is specifically divided into the first cleaning stage, the second cleaning stage, and the third cleaning stage. The stage division rules are as follows:

[0098] First cleaning stage: When and , generate a recommended cleaning instruction and execute it;

[0099] Second cleaning stage: When or , generate a delayed cleaning instruction and execute it;

[0100] Third cleaning stage: When or , generate a forced cleaning instruction and execute it;

[0101] Among them, , , and are all preset threshold parameters, and .

[0102] After the inner wall cleaning mechanism 4 finishes cleaning the inner wall of the flue gas pipeline 2, the actual cleaning date and actual cleaning cycle data are transmitted back to the database through the execution unit to complete the online update of the data.

[0103] By obtaining various flue gas induction data, performing standardized processing, calculating the basic cleaning cycle based on the historical cleaning cycle, combining the standardized flue gas induction data, calculating the dynamic correction factor, quantifying the current health status of the flue gas pipeline 2, generating the final prediction cycle, dividing the final prediction cycle into multiple cleaning stages, comparing data according to the stage division rules, analyzing the cleaning requirements of the current flue gas pipeline 2, and generating corresponding cleaning instructions to be sent to the execution unit, the inner wall cleaning mechanism 4 is controlled to start by the execution unit to clean the inner wall of the flue gas pipeline 2, so that the cleaning cycle can be dynamically adjusted according to the actual health status of the flue gas pipeline 2, avoiding unnecessary frequent cleaning or untimely cleaning, and ensuring the pertinence and effectiveness of the cleaning work.

[0104] The setting of the size of the interval and threshold is for the convenience of comparison. Regarding the size of the threshold, it depends on the amount of sample data and the number of base numbers set by those skilled in the art for each group of sample data; as long as the proportional relationship between the parameters and the quantified values is not affected.

[0105] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data and performing software simulation to obtain a formula closest to the actual situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0106] In the two embodiments provided in the present application, it should be understood that the disclosed devices and systems can be implemented in other ways; for example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed; another point, the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of the devices or modules can be in an electrical, mechanical or other form.

[0107] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A flue gas simultaneous desulfurization, denitrification, dust removal and demisting device, comprising a desulfurization tower body (1), the lower end outer surface of the desulfurization tower body (1) is fixedly connected to a flue gas pipeline (2), and a filter plate (3) is arranged inside the flue gas pipeline (2), characterized in that: It also includes: an inner wall cleaning mechanism (4) and an intelligent control system, and the inner wall cleaning mechanism (4) is arranged in the flue gas duct (2); The inner wall cleaning mechanism (4) comprises a mounting ring (401), a scraper (402) and a spiral rod (411); the mounting ring (401) is arranged in the flue gas duct (2); the scraper (402) is in contact with the inner wall of the flue gas duct (2); and the spiral rod (411) is arranged to penetrate the upper end of the mounting ring (401); The intelligent control system includes a data acquisition unit, a data processing unit, a prediction and analysis unit, and an execution unit; The data acquisition unit is connected to the data processing unit, the data processing unit is connected to the prediction and analysis unit, and the prediction and analysis unit is connected to the execution unit; The data acquisition unit comprises a sensor monitoring module and a data acquisition module, wherein the sensor monitoring module is used to acquire smoke sensing data of smoke in the process of entering the smoke duct (2) through a smoke sensor group arranged at the inlet of the smoke duct (2), and send the smoke sensing data to the data processing unit; The data acquisition module is used to obtain the historical cleaning date and historical cleaning period from the database and send them to the data processing unit; The data processing unit is used to perform standardization processing on the smoke sensing data and send it to the prediction and analysis unit; The prediction and analysis unit is used to calculate the basic cleaning cycle based on the historical cleaning cycle, and then calculate the dynamic correction factor based on the standardized flue gas sensing data. , to generate the final prediction cycle and divide the cleaning stage, generate cleaning instructions and send them to the execution unit; The execution unit is used to start the inner wall cleaning mechanism (4) to operate according to the cleaning instruction, and to update the historical cleaning date and historical cleaning cycle in the database; The flue gas sensor group includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor. The flue gas sensing data includes a flow rate sensor, a temperature sensor, a sulfur dioxide sensor and a nitrogen oxide sensor. ,temperature , sulfur dioxide concentration and nitrogen oxide concentration ; The specific process of the data processing unit performing standardized processing on the smoke sensing data is as follows: S101, flow rate ,temperature , sulfur dioxide concentration and nitrogen oxide concentration Normalization is performed, and the formula is: velocity ratio , Temperature ratio , sulfur dioxide concentration ratio and nitrogen oxide concentration ratio ; in, is the maximum flow rate safety threshold allowed in the flue gas duct (2); is the maximum temperature safety threshold allowed for the flue gas duct (2); is the maximum sulfur dioxide concentration safety threshold allowed in the flue gas duct (2); is the maximum nitrogen oxide concentration safety threshold allowed in the flue gas duct (2); S102, matching smoke sensing data with historical cleaning cycles according to timestamps; The specific process of generating the final forecast cycle is as follows: S201. Based on the historical cleaning cycle, the basic cleaning cycle is calculated using the weighted moving average method. , the formula is: ,in, is the penultimate i-th historical cleanup cycle, is the preset weight coefficient and satisfies ; S202: Based on the standardized smoke sensing data, the standardized ratio values ​​are weighted and summed to calculate the dynamic correction factor. , the formula is: , the dynamic correction factor The dynamic correction factor is used to quantify the current health status of the flue gas duct (2). The range is: ; When The closer it is to 0, the lighter the load on the flue gas duct (2) and the lower the cleaning demand; when The closer it is to 1, the more heavily loaded the flue gas duct (2) is and needs to be cleaned immediately; in, is the preset flow velocity weight coefficient; is the preset temperature weight coefficient; is the preset sulfur dioxide concentration weight coefficient; is the preset nitrogen oxide concentration weight coefficient and satisfies as well as ; S203, according to the basic cleaning cycle , combined with the dynamic correction factor , calculate the final prediction period , the formula is: .

2. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 1 is characterized in that: The scraper (402) is fixedly connected to the outer surface of one end of the mounting ring (401) away from the desulfurization tower body (1), the two ends of the spiral rod (411) are symmetrically rotatably connected with the fixing plate (410), and the fixing plate (410) is fixedly connected to the inner wall of the upper end of the flue gas duct (2), the mounting ring (401) is fixedly connected to the outer surface of the filter plate (3), the mounting ring (401) is threadedly connected to the spiral rod (411), and an annular pleated plate (412) is symmetrically fixedly connected between the mounting ring (401) and the fixing plate (410), and the annular pleated plate (412) is covered on the outside of the spiral rod (411).

3. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 2 is characterized in that: The end of the mounting ring (401) away from the desulfurization tower body (1) is provided with a first receiving groove (403) and a second receiving groove (404) in sequence from top to bottom, and the first receiving groove (403) is communicated with the second receiving groove (404), a linkage gear (405) is slidably connected in the first receiving groove (403), and the linkage gear (405) is sleeved on the outer surface of the spiral rod (411), a sliding ball (406) is fixedly connected to the inner surface of the linkage gear (405), and the sliding ball (406) is slidably connected to the spiral groove provided on the outer surface of the spiral rod (411).

4. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 3 is characterized in that: A driven gear ring (407) is slidably connected in the second receiving groove (404), and the driven gear ring (407) is meshingly connected with the linkage gear (405); a fixed column (408) is fixedly connected to the side of the driven gear ring (407) away from the desulfurization tower body (1); a cleaning plate (409) is fixedly connected to the outer surface of the fixed column (408), and the cleaning plate (409) is in contact with the surface of the side of the filter plate (3) away from the desulfurization tower body (1).

5. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 1 is characterized in that: The final prediction cycle is specifically divided into three cleaning stages, and is specifically divided into the first cleaning stage, the second cleaning stage, and the third cleaning stage according to the order of priority. The stage division rules are as follows: First cleanup phase: and When the system is running, it generates and executes recommended cleanup instructions; Second cleanup phase: or When , a delayed cleanup instruction is generated and executed; The third cleaning stage: or When a forced cleanup instruction is generated and executed; in, , , and are all preset threshold parameters, and .

6. The device for simultaneous desulfurization, denitration, dust removal and demisting of flue gas according to claim 5, characterized in that: After the inner wall cleaning mechanism (4) completes cleaning of the inner wall of the flue gas duct (2), the actual cleaning date and actual cleaning cycle data are transmitted back to the database through the execution unit, thereby completing the online update of the data.

Images