Boiler flue gas waste heat recovery device for power plant

Abstract

The present invention relates to the field of boiler flue gas waste heat recovery, and relates in particular to a boiler flue gas waste heat recovery device for a power plant. The boiler flue gas waste heat recovery device comprises a recovery box. The recovery box is sequentially divided from top to bottom into a first chamber and a second chamber by a horizontal partition. A heat exchange tube is provided in the first chamber, one end of the heat exchange tube is connected to a flue gas outlet tube of a boiler, and the first chamber is provided with an inlet for a fluid awaiting heat exchange. The other end of the heat exchange tube is in communication with the second chamber, and a filtering device is provided in the second chamber. The present invention achieves effective cooling of boiler flue gas, and allows a large amount of particulate matter contained in the flue gas to be filtered out, thereby reducing environmental harm by processing the flue gas.

Description

A boiler flue gas waste heat recovery device for power plants Technical Field

[0001] The present invention relates to the field of boiler flue gas waste heat recovery, and in particular to a boiler flue gas waste heat recovery device for a power plant. Background Art

[0002] A boiler is an energy conversion device. Energy input to the boiler includes chemical energy from fuel and electrical energy, and the boiler outputs a certain amount of thermal energy in the form of steam, high-temperature water, or an organic heat carrier. my country is the world's largest producer and user of boilers. China's manufacturing industry was established and developed after the founding of the People's Republic of China. For a considerable period of time to come, coal-fired industrial boilers will remain the dominant product in my country. Boiler flue gas contains large amounts of particulate matter and harmful gases, such as sulfur dioxide, nitrogen oxides, and particulate matter. These pollutants have a serious impact on air quality and the environment, potentially contributing to atmospheric environmental problems such as acid rain and haze. Furthermore, some harmful gases in boiler flue gas, such as carbon monoxide, are directly harmful to human health. Furthermore, particulate matter in the flue gas can also affect air quality and the respiratory system. During operation, industrial boiler flue gas contains large amounts of particulate dust, which, if discharged directly, can cause certain environmental pollution.

[0003] In the prior art, the boiler flue gas waste heat recovery device used in power plants usually only has the waste heat utilization function, which is single and not conducive to the treatment of flue gas.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to provide a boiler flue gas waste heat recovery device for power plants to solve the technical problem raised in the above background technology: in the prior art, the boiler flue gas waste heat recovery device for power plants usually only has the waste heat utilization function, which is single and not conducive to the treatment of flue gas.

[0006] In order to solve the above technical problems, the present invention discloses a boiler flue gas waste heat recovery device for a power plant, comprising:

[0007] The recovery box is divided into a first chamber and a second chamber from top to bottom by a horizontal partition. A heat exchange tube is arranged in the first chamber, one end of the heat exchange tube is connected to the smoke outlet pipe of the boiler, an inlet for the fluid to be exchanged is arranged in the first chamber, and the other end of the heat exchange tube is connected to the second chamber. A filtering device is arranged in the second chamber.

[0008] Preferably, the recovery device also includes: a protective cover, the upper end of the protective cover is open, and the upper end of the protective cover is in contact with the inner wall of the upper end of the second chamber, the protective cover is set in the second chamber, a filtering device is set inside the protective cover, and a fixing frame is fixed inside the protective cover, and the fixing frame is connected to the filtering device through a first spring.

[0009] Preferably, the filtering device comprises:

[0010] A filter box, the fixing frame is connected to the filter box through a first spring, a hollow tube is provided inside the filter box, the hollow tube is connected to the rotating rod, a plurality of air outlet holes are provided on the hollow tube, filter holes are provided on the upper end and side walls of the filter box, a sealing baffle is provided at the lower end of the filter box, a plurality of air holes are provided on the sealing baffle, and the sealing baffle is sealed and slidably connected to the inner wall of the protective cover along the up and down directions.

[0011] Preferably, it also includes a rotating shaft, one end of which is connected to a first gear, the first gear is meshed with a second gear fixed on the rotating rod for transmission, a cam is fixedly sleeved in the middle of the rotating shaft, the cam is in contact with a roller fixed at the lower end of the sealing baffle, the roller passes through the lower end of the protective cover, and the rotating shaft is driven by a first motor.

[0012] Preferably, the second chamber is further divided into a third chamber and a fourth chamber by a first horizontal sealing partition and a second horizontal sealing partition, and the third chamber is provided with:

[0013] A bidirectional screw, the left end of which is fixedly connected to the rotating shaft, the right end of which is fixed in the bearing seat, the bearing seat is fixedly connected to the inner wall of the third chamber, the bidirectional threaded sections on the bidirectional screw are respectively threadedly connected to the movable plate, the movable plate slides in the slide rail in the first horizontal sealed partition, the movable plate is fixedly connected to the smoke barrier block, a first opening is set on the first horizontal sealed partition, and a second opening is set on the second horizontal sealed partition.

[0014] Preferably, the recovery box is fixed above the bottom plate, the bottom plate is supported by a support, and the fourth chamber is located below the third chamber;

[0015] The fourth chamber is provided with: a feed port, the feed port passes through the fourth chamber, a stirring rod passes through the fourth chamber and is connected to a driving device, the driving device is used to drive the stirring rod and the bidirectional screw, the collection box is located at the bottom of the fourth chamber, and the collection box is slidably mounted on the bottom plate.

[0016] Preferably, the driving device includes: a fourth gear, the right side of the fourth gear is connected to the stirring rod, the fourth gear is meshed with the third gear for transmission, the fourth gear is driven by the second motor, and the third gear is fixedly sleeved on the rotating shaft.

[0017] Preferably, the heat exchange tube is fixed by a clamping device, and the clamping device includes:

[0018] A fixing rod, wherein the rear end of the fixing rod is fixed to the inner wall of the rear side of the first chamber, a card slot is provided at the lower part of the front end of the fixing rod, the upper part of the front end of the fixing rod is fixedly connected to the fixing plate, a slide slot is provided at the lower end of the fixing plate, a "J"-shaped clip is arranged inverted, and the "J"-shaped clip slides up and down in the slide slot, a second spring is connected to the top of the clip, and the other end of the second spring is connected to the top of the open slide slot of the fixing plate, and the clip end of the clip is located in the card slot;

[0019] An upper clamp is fixed to the front side of the fixed plate, a third spring is connected to the lower end of the upper clamp, the other end of the third spring is connected to the lower clamp, and the rear side of the lower clamp is fixedly connected to the buckle.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] FIG1 is an overall device diagram of the present invention;

[0023] FIG2 is a partial enlarged view of point A in FIG1 ;

[0024] FIG3 is a partial enlarged view of point B in FIG1 ;

[0025] FIG4 is a top view of the filter device of the present invention;

[0026] FIG5 is a right side view of the first chamber of the present invention;

[0027] FIG6 is a schematic diagram of a supporting device of the present invention.

[0028] In the figure: 1. bottom plate; 2. boiler; 21. smoke outlet pipe; 3. recovery box; 4. first chamber; 41. heat exchange tube; 42. inlet of fluid to be exchanged; 44. clamping device; 4401. upper clamp; 4402. fixing rod; 4403. second spring; 4404. slot; 4405. third spring; 4406. slide; 4407. buckle; 4408. fixing plate; 4409. lower clamp; 5. second chamber; 51. protective cover; 52. filter device; 5201. filter box; 5202. first spring; 5203. hollow tube; 5204. air outlet; 5205. brush; 5206. fixing bracket; 5207. rotating rod; 5208. second gear; 5210. first gear; 5211. Cam; 5212, rotating shaft; 5213, roller; 5214, sealing baffle; 53, first motor; 54, first opening; 55, supporting device; 5501, support plate; 5502, sleeve rod; 5503, connecting rod; 5504, support rod; 5505, slide rail; 5506, cylindrical pin; 5507, slider; 5508, fourth spring; 6, third chamber; 61, third gear; 62, rotating shaft; 63, bidirectional screw; 65, movable plate; 66, slide rail; 67, smoke barrier; 68, first horizontal sealing partition; 69, second opening; 610, second horizontal sealing partition; 7, fourth chamber; 71, feed port; 72, stirring rod; 73, fourth gear; 74, second motor; 8, collecting box. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features of each embodiment can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides the following embodiments

[0032] In Example 1, the present invention discloses a boiler flue gas waste heat recovery device for a power plant, as shown in FIG1-FIG2, comprising:

[0033] The recovery box 3 is divided into a first chamber 4 and a second chamber 5 from top to bottom by a horizontal partition. A heat exchange tube 41 is provided in the first chamber 4. One end of the heat exchange tube 41 is connected to the smoke outlet pipe 21 of the boiler 2. The first chamber 4 is provided with an inlet 42 for the fluid to be heat exchanged. The other end of the heat exchange tube 41 is connected to the second chamber 5. A filter device 52 is provided in the second chamber 5.

[0034] The working principle and beneficial effects of the above technical solution are as follows: the flue gas enters the heat exchange tube 41 from the smoke outlet pipe 21 of the boiler 2, and the fluid to be heat-exchanged enters the first chamber 4 from the fluid to be heat-exchanged inlet 42, thereby realizing heat exchange between the flue gas and the fluid to be heat-exchanged, heating the fluid to be heat-exchanged and recovering the waste heat of the flue gas, and the flue gas after the waste heat is recovered enters the filter device 52 for filtration; the present invention solves the technical problem raised in the background technology: in the prior art, the boiler flue gas waste heat recovery device used in power plants usually only has the waste heat utilization function, has a single function, and is not conducive to the treatment of flue gas.

[0035] Example 2. On the basis of Example 1, as shown in Figures 1, 3 and 4, the recovery device further includes: a protective cover 51, the upper end of the protective cover 51 is open, and the upper end of the protective cover 51 is in contact with the inner wall of the upper end of the second chamber 5, the protective cover 51 is arranged in the second chamber 5, and a filtering device 52 is arranged inside the protective cover 51, and a fixing frame 5206 is fixed in the protective cover 51, and the fixing frame 5206 is connected to the filtering device 52 through a first spring 5202.

[0036] Preferably, the filtering device 52 comprises:

[0037] The filter box 5201 has a fixing frame 5206 connected to the filter box 5201 via a first spring 5202. A hollow tube 5203 is provided inside the filter box 5201, which is connected to a rotating rod 5207. The hollow tube 5203 is provided with a plurality of air outlet holes 5204. The filter box 5201 has filter holes on its upper end and side walls. A sealing baffle 5214 is provided at its lower end. The sealing baffle 5214 has a plurality of air vents and is in sealed sliding connection with the inner wall of the protective cover 51 in the vertical direction.

[0038] The rotating shaft 5212 has one end connected to the first gear 5210, and the first gear 5210 is meshed with the second gear 5208 fixed on the rotating rod 5207 for transmission. The middle part of the rotating shaft 5212 is fixedly connected to the cam 5211, and the cam 5211 is in contact with the roller 5213 fixed at the lower end of the sealing baffle 5214. The roller 5213 passes through the lower end of the protective cover 51. The rotating shaft 5212 is driven by the first motor 53.

[0039] Preferably, the filtering device 52 further comprises: a plurality of brushes 5205 are provided on the outer wall of the hollow tube 5203, and the brushes 5205 are closely attached to the inner wall of the filter box 5201. The brushes 5205 on the hollow tube 5203 brush the inner wall of the filter box 5201 to prevent the filtered smoke impurities from clogging the filter box 5201;

[0040] Among them, the filter box 5201 of the present invention is provided with filter holes on the upper end and side walls to block larger particles of smoke impurities. In the present invention, other filters with different functions can also be provided in the filter box 5201;

[0041] The working principle and beneficial effects of the above technical solution are as follows: the flue gas after waste heat utilization passes through the heat exchange tube 41 and enters the second chamber 5, then enters the interior of the filter box 5201 through the upper end and side wall of the filter box 5201, and the filtered flue gas is discharged from the filter box 5201 through the multiple vents provided in the sealing baffle 5214, thereby filtering impurities in the flue gas;

[0042] In the present invention, the motor 53 is started, the rotating shaft 5212 drives the cam 5211 and the first gear 5210 to rotate, and the second gear 5208 engaged with the first gear 5210 also rotates accordingly, and the second gear 5208 drives the rotating rod 5207 to rotate. At this time, the rotating rod 5207 drives the hollow tube 5203 to rotate, and the compressed gas enters the hollow tube 5203 through the compressed gas inlet pipe connected to the hollow tube 5203. The hollow tube 5203 is also provided with a plurality of gas outlet holes 5204, and the compressed gas will be discharged from the gas outlet holes. 5204 is blown out, and the dust adhering to the filter box 5201 is auxiliary cleaned. The rotation of the cam 5211 drives the roller 5213 to move up and down, so that the filter box 5201 is constantly vibrating up and down to facilitate the shaking off of the dust adhering to the filter box 5201. During the vibration, a dust suction pipe is used to suck the smoke particles (in the present invention, a dust suction pipe can also be provided to connect to the second chamber 5, and the dust suction pipe is connected to the dust suction device). The above cleaning prevents the filter box 5201 from being blocked, ensures the normal flow of smoke, and improves the filtration efficiency.

[0043] Example 3, based on Example 1 or 2, as shown in FIG1 and FIG2, the second chamber 5 is further divided into a third chamber 6 and a fourth chamber 7 by a first horizontal sealing partition 68 and a second horizontal sealing partition 610, and the third chamber 6 is provided with:

[0044] A bidirectional screw 63, the left end of which is fixedly connected to the rotating shaft 62, the right end of which is fixed in the bearing seat, the bearing seat is fixedly connected to the inner wall of the third chamber 6, the bidirectional threaded sections on the bidirectional screw 63 are respectively threadedly connected to the movable plate 65, the movable plate 65 slides in the slide rail 66 in the first horizontal sealing partition 68, the movable plate 65 is fixedly connected to the smoke barrier block 67, a first opening 54 is provided on the first horizontal sealing partition 68, and a second opening 69 is provided on the second horizontal sealing partition 610.

[0045] Preferably, the recovery box 3 is fixed above the bottom plate 1, the bottom plate 1 is supported by a support 9, and the fourth chamber 7 is located below the third chamber 6;

[0046] The fourth chamber 7 is provided with: a feed port 71, the feed port 71 passes through the fourth chamber 7, a stirring rod 72 passes through the fourth chamber 7 and is connected to a driving device, the driving device is used to drive the stirring rod 72 and the bidirectional screw 63, and the collecting box 8 is located at the bottom of the fourth chamber 7, and the collecting box 8 is slidably mounted on the base plate 1.

[0047] Preferably, the driving device includes: a fourth gear 73, the right side of the fourth gear 73 is connected to the stirring rod 72, the fourth gear 73 is engaged with the third gear 61 for transmission, the fourth gear 73 is driven by the second motor 74, and the third gear 61 is fixedly sleeved on the rotating shaft 62.

[0048] In the present invention, a suction fan may be provided on the movable plate 65 to facilitate the smoke to enter the third chamber 6 through the first opening 54 and then be discharged to the fourth chamber 7;

[0049] The working principle and beneficial effects of the above technical solution are:

[0050] 1. After passing through the filter device 52, the flue gas enters the third chamber 6 through the first opening 54. At this time, the flue gas density is relatively high. The second motor 74 is turned on, and the fourth gear 73 and the third gear 61 move. The bidirectional lead screw 63 rotates forward and reverse, causing the movable plates 65 to move toward or away from each other, allowing the flue gas to enter the third chamber 6 through the first opening 54 and then be discharged into the fourth chamber 7.

[0051] 2. At the same time, the smoke block 67 on the movable plate 65 can adjust the size of the first opening 54;

[0052] 3. Chemical reagents are then added from the feed port 71, and the stirring rod 72 rotates to fully react the flue gas with the chemical reagents to form usable solids and non-toxic and harmless gases. The solids after the reaction are stored in the collection box 8, and the gases are released from the feed port 71. The present invention effectively cools the boiler flue gas and filters a large amount of particulate dust contained in the flue gas, so that the flue gas can be directly discharged to the outside.

[0053] Example 4, based on any one of Examples 1-3, as shown in Figures 1 and 5, the heat exchange tube 41 is fixed by a clamping device 44, and the clamping device 44 includes:

[0054] A fixing rod 4402, the rear end of which is fixed to the rear inner wall of the first chamber 4, a slot 4404 is provided at the lower front end of the fixing rod 4402, the upper front end of the fixing rod 4402 is fixedly connected to a fixing plate 4408, a slide groove 4406 is provided at the lower end of the fixing plate 4408, a "J"-shaped clip 4407 is arranged inverted, and the "J"-shaped clip 4407 slides up and down in the slide groove 4406, a second spring 4403 is connected to the top of the clip 4407, the other end of the second spring 4403 is connected to the top of the slide groove 4406 of the fixing plate 4408, and the clip end of the clip 4407 is located in the slot 4404; wherein the slots 4404 can be provided as a plurality of clips arranged at intervals up and down;

[0055] The upper clamp 4401 is fixed to the front side of the fixed plate 4408, the lower end of the upper clamp 4401 is connected to the third spring 4405, the other end of the third spring 4405 is connected to the lower clamp 4409, and the rear side of the lower clamp 4409 is fixedly connected to the buckle 4407.

[0056] The working principle and beneficial effects of the above technical solution are as follows: in the present invention, when the heat exchange tube 41 needs to be fixed, it is only necessary to push upward the buckle 4407 in the clamping device 44, and the lower clamp 4409 will be clamped by the action of the third spring 4405. When a certain tensioning force is reached, the buckle 4407 is pulled downward. Under the action of the third spring 4405, the other end of the buckle 4407 will enter the slot 4404, and the heat exchange tube 41 is in a clamped state. The setting of the clamping device 44 of the present invention can fix the heat exchange tube 41 well.

[0057] Example 5, based on the above-mentioned Example 2, as shown in Figures 1 and 6, further includes a supporting device 55, and the supporting device 55 includes:

[0058] The support plate 5501 supports the lower end of the protective cover 51 at the top of the support plate 5501, and the two ends of the support plate 5501 are hingedly connected to the connecting rod 5503. A support rod 5504 is set in the middle of the support plate 5501, and the support rod 5504 is slidably sleeved in the sleeve rod 5502. A fourth spring 5508 is connected to the bottom of the support plate 5501, and the sleeve rod 5502 is fixed with a cylindrical pin 5506 (the support rod 5504 is provided with a plurality of first connecting holes at intervals above and below, and the sleeve rod 5502 is provided with a second connecting hole, and the cylindrical pin 5506 connects the first connecting hole and the second connecting hole). The bottom of the connecting rod 5503 is connected with a slider 5507, and the slider 5507 slides in the slide rail 5505, and the slide rail 5505 is fixedly connected to the lower end of the sleeve rod 5502.

[0059] The working principle and beneficial effects of the above technical solution are as follows: In the present invention, the protective cover 51 is a detachable device, and a supporting device 55 is arranged underneath it. The supporting device 55 can be adjusted up and down to ensure the stability of the protective cover 51 (and adapt to different heights). When the height of the protective cover 51 needs to be adjusted, it is only necessary to pull the cylindrical pin 5506 to move the support rod 5504 up and down, and at the same time, the slider 5507 slides in the slide rail 5505 to adjust the position of the connecting rod 5503. The present invention can well adjust the height of the filter device 52 to ensure its stability, and the support plate 5501, support rod 5504, sleeve rod 5502, fourth spring 5508, and connecting rod 5503 constitute a stably connected support structure to ensure the stability of the support.

[0060] Example 6, based on any one of Examples 1-5, further comprises:

[0061] A division module, used to divide the heat exchange tube 41 into several detection areas;

[0062] A plurality of first acquisition modules are provided at the starting position, midpoint position, and end position of each detection area. The first acquisition modules are used to collect the flue gas information of the heat exchange tube 41 at the location thereof. The flue gas information of the heat exchange tube 41 includes: the flue gas temperature of the heat exchange tube 41 and the flue gas flow rate of the heat exchange tube 41. Each first acquisition module is numbered;

[0063] A first calculation module, configured to obtain a first evaluation value of the detection area based on the plurality of first acquisition modules;

[0064] A wj is the first evaluation value of the wth cycle in the jth detection area, M is the total category of smoke information, a wi2j is the actual detection value of the i-th smoke information collected by the first acquisition module at the midpoint of the j-th detection area in the w-th cycle, a wi1jis the actual detection value of the i-th smoke information collected by the first acquisition module at the starting position of the j-th detection area in the w-th cycle, a wi3j is the actual detection value of the i-th smoke information collected by the first acquisition module at the end position of the j-th detection area in the w-th cycle, a 0i for|a wi2j -a wi1j |Maximum permissible deviation value, a 1i for|a wi2j -a wi3j |Maximum permissible deviation, δ 1i for a wi2j Relative to a wi1j The influence coefficient of the deviation state on the heat transfer efficiency; δ 2i for a wi2j Relative to a wi3j The influence coefficient of the deviation state on the heat transfer efficiency;

[0065] A second collection module is used to collect information about actual water in the first cavity, wherein the information about actual water includes: actual flow rate of water and actual temperature of water;

[0066] A second calculation module is used to calculate the second difference between the actual water information collected by the second acquisition module and the corresponding water standard information, and compare the second difference with the corresponding preset range. When the second difference is within the corresponding preset range, the first evaluation value within the detection period of the detection area is determined to be the final first evaluation value of the detection period of the detection area, and the control strategy formulation module is controlled to work; when the second difference is not within the corresponding preset range (any second difference is not within the corresponding preset range), the water parameters are adjusted (the second difference between the adjusted water information and the corresponding water standard information is within the corresponding preset range) and then the first acquisition module is controlled to work for a certain period (both the first acquisition module and the second acquisition module work periodically according to the preset detection period, and the determined period is the same as the preset detection period) to obtain the first evaluation value of each first detection area of ​​the corresponding determined period;

[0067] a third calculation module, configured to average the first evaluation value corresponding to the current detection period of the detection area and the first evaluation value corresponding to the determination period of the detection area, obtain the average first evaluation value of the current detection period of each detection area, and determine the average first evaluation value of the current detection period of the detection area as the final evaluation value of the current detection period of the detection area;

[0068] A sorting module, used to sort the final first evaluation values ​​in descending order;

[0069] a first determining module, evaluating a detection area corresponding to a final first evaluation value not within a corresponding preset range as a first abnormality detection area, and determining whether the first abnormality detection area is a continuous (positionally continuous) first abnormality detection area or an independent first abnormality detection area;

[0070] The strategy formulation module is used to determine the adjustment strategy for the heat exchange tube 41 according to the distribution of the first abnormal area and the independent first abnormal area and the sorting module.

[0071] The beneficial effects of the above technical solution are:

[0072] 1. The heat exchange tube 41 is divided into several detection areas to facilitate the targeted acquisition of the flue gas status in each detection area. The flue gas status in each detection area is determined based on the flue gas information at the starting position, midpoint position and end point of the detection area. The flue gas status of the detection area is comprehensively evaluated, and then based on: the change state of the flue gas information at the starting position and midpoint position Changing status of smoke information at the midpoint and end point and a wi2j Relative to a wi1j The influence coefficient of the deviation state on the heat transfer efficiency, a wi2j Relative to a wi3j The influence coefficient of the deviation state on the heat exchange efficiency is used to comprehensively evaluate the state of the flue gas heat exchange effect caused by the change trend of the current detection area (the first evaluation value);

[0073] 2. Then, the actual water information in the first cavity is simultaneously obtained, and a second difference between the actual water information and the corresponding standard water information is determined. If the second difference is not within the corresponding preset range, the water parameters are adjusted and the first acquisition module is controlled to operate for a certain period to eliminate the impact of the abnormal water information on the flue gas information of the heat exchange tube 41. If an impact is found, the average first evaluation value is obtained to more reliably determine the final first evaluation value.

[0074] 3. The adjustment strategy for the heat exchange tube 41 is determined based on the distribution of the first abnormal area and the independent first abnormal area and the sorting module, so as to comprehensively determine the adjustment strategy for the heat exchange tube according to the distribution of the abnormal flue gas area in the heat exchange tube (adjustment of the size, shape, and length of a certain part of the heat exchange tube). This can increase the size of a certain part of the heat exchange tube to avoid abnormal flue gas flow caused by factors such as the size of the heat exchange tube in some places.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A boiler flue gas waste heat recovery device for a power plant, characterized in that: include: A recovery box (3), the recovery box (3) being divided into a first chamber (4) and a second chamber (5) from top to bottom by a horizontal partition, a heat exchange tube (41) being arranged in the first chamber (4), one end of the heat exchange tube (41) being connected to a smoke outlet pipe (21) of a boiler (2), an inlet (42) for a fluid to be exchanged with heat being arranged in the first chamber (4), the other end of the heat exchange tube (41) being connected to the second chamber (5), and a filtering device (52) being arranged in the second chamber (5).

2. The boiler flue gas waste heat recovery device for a power plant according to claim 1, characterized in that: The recovery device further comprises: a protective cover (51), the upper end of the protective cover (51) is open and the upper end of the protective cover (51) is in contact with the inner wall of the upper end of the second chamber (5), the protective cover (51) is arranged in the second chamber (5), a filtering device (52) is arranged inside the protective cover (51), a fixing frame (5206) is fixedly arranged inside the protective cover (51), and the fixing frame (5206) is connected to the filtering device (52) via a first spring (5202).

3. The boiler flue gas waste heat recovery device for a power plant according to claim 2, characterized in that: The filtering device (52) comprises: A filter box (5201), the fixing frame (5206) is connected to the filter box (5201) via a first spring (5202), a hollow tube (5203) is arranged inside the filter box (5201), the hollow tube (5203) is connected to a rotating rod (5207), a plurality of air outlet holes (5204) are arranged on the hollow tube (5203), filter holes are arranged on the upper end and side walls of the filter box (5201), a sealing baffle (5214) is arranged at the lower end of the filter box (5201), a plurality of air holes are arranged on the sealing baffle (5214), and the sealing baffle (5214) is sealed and slidably connected to the inner wall of the peripheral side of the protective cover (51) along the up and down directions.

4. The boiler flue gas waste heat recovery device for a power plant according to claim 3, characterized in that: The invention also includes a rotating shaft (5212), one end of which is connected to a first gear (5210), the first gear (5210) being meshed with a second gear (5208) fixed on a rotating rod (5207) for transmission, a cam (5211) being fixedly sleeved in the middle of the rotating shaft (5212), the cam (5211) being in contact with a roller (5213) fixed at the lower end of a sealing baffle (5214), the roller (5213) passing through the lower end of the protective cover (51), and the rotating shaft (5212) being driven by a first motor (53).

5. The boiler flue gas waste heat recovery device for a power plant according to claim 2, characterized in that: The second chamber (5) is further divided into a third chamber (6) and a fourth chamber (7) by a first horizontal sealing partition (68) and a second horizontal sealing partition (610), and the third chamber (6) is provided with: A bidirectional screw (63), the left end of which is fixedly connected to the rotating shaft (62), the right end of which is fixed in the bearing seat, the bearing seat is fixedly connected to the inner wall of the third chamber (6), the bidirectional threaded sections on the bidirectional screw (63) are respectively threadedly connected to the movable plate (65), the movable plate (65) slides in the slide rail (66) in the first horizontal sealing partition (68), the movable plate (65) is fixedly connected to the smoke blocking block (67), the first horizontal sealing partition (68) is provided with a first opening (54), and the second horizontal sealing partition (610) is provided with a second opening (69).

6. The boiler flue gas waste heat recovery device for a power plant according to claim 5, characterized in that: The recovery box (3) is fixed above the bottom plate (1), the bottom plate (1) is supported by a support (9), and the fourth chamber (7) is located below the third chamber (6); The fourth chamber (7) is provided with a feed inlet (71), the feed inlet (71) passing through the fourth chamber (7). The fourth chamber (7) has a stirring rod (72) extending through the fourth chamber (7) and connected to a driving device, the driving device is used to drive the stirring rod (72) and the bidirectional lead screw (63), the collecting box (8) is located at the bottom of the fourth chamber (7), and the collecting box (8) is slidably mounted on the bottom plate (1).

7. The boiler flue gas waste heat recovery device for a power plant according to claim 6, characterized in that: The driving device comprises: a fourth gear (73), the right side of the fourth gear (73) is connected to the stirring rod (72), the fourth gear (73) is meshed with the third gear (61) for transmission, the fourth gear (73) is driven by the second motor (74), and the third gear (61) is fixedly sleeved on the rotating shaft (62).

8. The boiler flue gas waste heat recovery device for a power plant according to claim 1, characterized in that: The heat exchange tube (41) is fixed by a clamping device (44), and the clamping device (44) comprises: A fixing rod (4402), wherein the rear end of the fixing rod (4402) is fixed to the inner wall of the rear side of the first chamber (4), a slot (4404) is arranged at the lower part of the front end of the fixing rod (4402), the upper part of the front end of the fixing rod (4402) is fixedly connected to the fixing plate (4408), a slide groove (4406) is arranged at the lower end of the fixing plate (4408), a "J"-shaped buckle (4407) is arranged inverted, and the "J"-shaped buckle (4407) slides up and down in the slide groove (4406), a second spring (4403) is connected to the top of the buckle (4407), the other end of the second spring (4403) is connected to the top of the opening of the slide groove (4406) of the fixing plate (4408), and the buckle end of the buckle (4407) is located in the slot (4404); The upper clamp (4401) is fixed to the front side of the fixing plate (4408), the lower end of the upper clamp (4401) is connected to a third spring (4405), the other end of the third spring (4405) is connected to the lower clamp (4409), and the rear side of the lower clamp (4409) is connected to the buckle (4407). Fixed connection.

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