Heat exchange assembly and air preheater

Abstract

The invention provides a heat exchange assembly and an air preheater, and relates to the technical field of thermal power generation, the heat exchange assembly comprises a heat exchange wheel carrier, a plurality of fan-shaped partition plates are fixedly connected in the heat exchange wheel carrier, a plurality of heat exchange elements are arranged among the plurality of fan-shaped partition plates, a plurality of locking structures are arranged on the side face of the heat exchange wheel carrier, and the plurality of locking structures are matched with the plurality of heat exchange elements. A center cylinder is arranged in the center of the heat exchange wheel frame and connected with a rotating shaft through a bolt, and a sealing structure is arranged on the surface of the heat exchange wheel frame. The technical problem that a rotary air preheater heat exchange assembly is of a fixed structure, and part of heat exchange elements cannot be detached independently for maintenance and replacement is solved.

Description

Technical Field

[0001] The invention belongs to the field of thermal power generation, and in particular relates to a heat exchange component and an air preheater. Background Art

[0002] Air preheater is also referred to as air preheater. It is a preheating device that improves the heat exchange performance of the boiler and reduces heat loss. The function of the air preheater is to transfer the heat carried by the flue gas discharged from the tail flue of the boiler to the air before entering the boiler through the heat exchange element, and preheat the air to a certain temperature. The heating surface rotary preheater is commonly used in power station boilers.

[0003] The existing heat exchange assembly of the heating surface rotary preheater generally adopts a fixed structure. The heat exchange elements are fixed in the heat exchange assembly and cannot be removed separately. When some heat exchange elements need to be replaced and repaired, the entire structure needs to be dismantled for repair and replacement, which has great limitations. Summary of the invention

[0004] The present invention provides a heat exchange component and an air preheater to solve at least one technical problem raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a heat exchange assembly, including: a heat exchange wheel frame, a plurality of fan-shaped partitions are fixedly connected inside the heat exchange wheel frame, a plurality of heat exchange elements are arranged between the plurality of fan-shaped partitions, a plurality of locking structures are arranged on the side of the heat exchange wheel frame, the plurality of locking structures cooperate with the plurality of heat exchange elements, a central tube is arranged at the center of the heat exchange wheel frame, a rotating shaft is bolted to the central tube, and a sealing structure is arranged on the surface of the heat exchange wheel frame.

[0006] Preferably, the heat exchange element includes a heat exchange energy storage plate, and a plurality of heat exchange energy storage plates are stacked in sequence from large to small between the fan-shaped partitions, and a plurality of heat exchange energy storage plates are provided with vertical corrugations and oblique corrugations, and the vertical corrugations and the oblique corrugations are staggered with each other.

[0007] Preferably, the locking structure includes a locking cover plate, which is hingedly connected to the heat exchange wheel frame, one side of the locking cover plate is fixedly connected to a plurality of high-temperature compression elastic parts, the other ends of the plurality of high-temperature compression elastic parts are fixedly connected to a top plate, the other side of the locking cover plate is fixedly connected to a lifting sleeve, the lifting sleeve is slidably connected to a lifting lock rod, a locking hole is provided on the heat exchange wheel frame, the locking hole and the lifting lock rod correspond to each other, a baffle is fixedly connected to the lifting lock rod, the left and right sides of the baffle are hingedly connected to a folding rod 1, the left and right sides of the lifting sleeve are hingedly connected to a folding rod 2, the other ends of the folding rod 1 and the folding rod 2 are respectively hingedly connected to the two ends of the push handle, and a high-temperature compression elastic part 2 is provided between the folding rod 1 and the folding rod 2.

[0008] Preferably, the sealing structure includes radial sealing strips, axial sealing strips, rotating shaft sealing rings and outer sealing strips. Several radial sealing strips are bolted to the upper and lower ends of several fan-shaped partitions, several axial sealing strips are bolted to the sides of several fan-shaped partitions, the rotating shaft sealing ring is bolted to the center tube, and several outer sealing strips are bolted to the outer circumferences on the upper and lower sides of the heat exchange wheel frame.

[0009] The invention discloses an air preheater, comprising: a rotary casing, wherein the upper and lower ends of the rotary casing are fixedly connected with supporting cross beams, a smoke passage opening is arranged on one side of the supporting cross beam, a primary air passage opening and a secondary air passage opening are arranged on the other side of the supporting cross beam, the primary air passage opening and the secondary air passage opening are spaced apart from each other by radial cross beams, a heat exchange component is arranged in the rotary casing, a rotating shaft of the heat exchange component is rotatably connected to the supporting cross beams at the upper and lower ends, a driving motor is bolted to the top supporting cross beam, an output end of the driving motor is connected to the rotating shaft, a sealing door is arranged on the side of the rotary casing, a sealing baffle is bolted to the supporting cross beam, the radial cross beam and the rotary casing, the sealing baffle cooperates with the radial sealing strip and the axial sealing strip, the upper and lower ends of the rotary casing are bolted with elastic retaining rings, the elastic retaining rings cooperate with the outer sealing retaining strip, a dust cleaning component is arranged on the rotary casing, and a dehumidification component is arranged at the primary air passage opening and the secondary air passage opening;

[0010] It also includes a heat exchange control component, which is used to monitor and adjust the heat exchange efficiency of the heat exchange component.

[0011] Preferably, the cleaning assembly includes a cleaning pipe, which is arranged at the mouth of the smoke channel, passes through and is fixedly connected to the rotary casing and the supporting beam, and is provided with a plurality of purge holes. The other end of the cleaning pipe is flange-connected to an output fan, and the output fan is bolted to the rotary casing.

[0012] Preferably, the dehumidification component includes a dehumidification box, which is bolted to the primary air duct opening and the secondary air duct opening. Two partitions are fixedly connected inside the dehumidification box, and a dehumidification structure is rotatably connected to the two partitions. The left and right sides of the dehumidification box are respectively provided with a primary air inlet and a secondary air inlet. Regeneration channels are provided on the left and right sides of the dehumidification box top. Drying fans are installed on both partitions, and the drying fans are connected to the regeneration channels.

[0013] Preferably, the dehumidification structure includes a driving shaft, and the two driving shafts respectively penetrate and are rotatably connected to the two partitions and the regeneration channel, one end of the two driving shafts is connected to a double-headed driving motor, and the double-headed driving motor is bolted to the dehumidification box, and the other ends of the two driving shafts are respectively installed with dehumidification turntables, and a plurality of adsorption materials are arranged in the dehumidification turntables, and the dehumidification turntables cooperate with the regeneration channel.

[0014] Preferably, the heat exchange control component includes a control module, a data processing module, a detection module and an execution module, and the detection module includes:

[0015] Temperature difference sensor 1: used to detect the difference between the inlet temperature and the outlet temperature of the smoke in the smoke channel opening, which is set on the supporting beam on one side of the smoke channel opening;

[0016] Temperature difference sensor 2: used to detect the difference between the inlet temperature and the outlet temperature of the primary air in the primary air duct opening, and is arranged on the supporting beam corresponding to the primary air duct opening;

[0017] Temperature difference sensor 3: used to detect the difference between the inlet temperature and the outlet temperature of the secondary air in the secondary air duct opening, which is set on the supporting beam corresponding to the secondary air duct opening;

[0018] Flow sensor 1: used to detect the flow of smoke in the smoke channel opening, which is set on the supporting beam on one side of the smoke channel opening;

[0019] Flow sensor 2: used to detect the flow of primary air in the primary air channel opening, which is arranged on the radial beam corresponding to the primary air channel opening;

[0020] Flow sensor three: used to detect the flow of secondary air in the secondary air channel opening, which is arranged on the radial beam corresponding to the secondary air channel opening;

[0021] Spacing sensor: used to detect the spacing between the heat exchange and energy storage plates, which is set on the supporting beam;

[0022] Pressure sensor: used to detect the pressure of the heat exchange energy storage plate at the upper and lower ends of the smoke channel opening, which is set on the supporting beam on one side of the smoke channel opening;

[0023] The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution module to work based on the data results of the data processing module.

[0024] Preferably, the control module controls the execution module based on the data result of the data processing module, including the following steps:

[0025] Step 1: Calculate the working state coefficient C of the heat exchange component based on the detection values ​​of temperature difference sensor 1, temperature difference sensor 2, temperature difference sensor 3, flow sensor 1, flow sensor 2, flow sensor 3, spacing sensor and pressure sensor h :

[0026] Where: C his the working state coefficient of the heat exchange component, η is the time compensation coefficient, c1 is the specific heat capacity coefficient of the flue gas, ρ1 is the density of the flue gas, Q1 is the detection value of the flow sensor 1, ΔT1 is the detection value of the temperature difference sensor 1, c2 is the specific heat capacity coefficient of the air, ρ2 is the density of the air, Q2 is the detection value of the flow sensor 2, ΔT2 is the detection value of the temperature difference sensor 2, Q3 is the detection value of the flow sensor 3, ΔT3 is the detection value of the temperature difference sensor 3, P is the detection value of the pressure sensor, and x is the detection value of the spacing sensor;

[0027] Step 2: Data Processing Module Comparison C h and C h0 , when C h <C h0 Calculate the cleaning degree coefficient C of the heat exchange component when c , when C h ≥C h0 No processing is done when

[0028] Where: C c is the cleaning degree coefficient of the heat exchange component, C h0 is the reference value of the working state coefficient of the heat exchange component, and ln is the natural logarithm function;

[0029] Step 3: When 0.5 <C c ≤1, the cleaning degree is level one, when 0 <C c ≤0.5, the cleaning degree is level two, and the control module controls the execution module to drive the cleaning component to clean according to the cleaning degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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:

[0031] Figure 1 The structure of the heat exchange component of the present invention is schematically shown in FIG. Figure 1 ;

[0032] Figure 2 The structure of the heat exchange component of the present invention is schematically shown in FIG. Figure 2 ;

[0033] Figure 3 The structure of the heat exchange component of the present invention is schematically shown in FIG. Figure 3 ;

[0034] Figure 4 It is a schematic structural diagram of the heat exchange element of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the locking structure of the present invention;

[0036] Figure 6 The structure of the air preheater of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 7 The structure of the air preheater of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 8 The structure of the air preheater of the present invention is shown in FIG. Figure 3 ;

[0039] Fig. 9 The structure of the dehumidification component of the present invention is shown in FIG. Figure 1 ;

[0040] Fig.10 The structure of the dehumidification component of the present invention is shown in FIG. Figure 2 .

[0041] In the figure: 1. heat exchange wheel frame; 11. fan-shaped partition; 12. center tube; 13. rotating shaft; 2. heat exchange element; 21. heat exchange energy storage plate; 22. vertical corrugation; 23. oblique corrugation; 3. locking structure; 31. locking cover plate; 32. high temperature compression elastic member 1; 33. top plate; 34. lifting sleeve; 35. lifting lock rod; 36. locking hole; 37. baffle; 38. folding rod 1; 39. folding rod 2; 310. push handle; 311. high temperature compression elastic member 2; 4. sealing structure; 41. radial sealing strip; 42. axial sealing strip; 43. rotating shaft sealing ring; 44. outer sealing baffle; 5. rotary machine Shell; 51, supporting beam; 52, flue gas channel opening; 53, primary air channel opening; 54, secondary air channel opening; 55, radial beam; 56, heat exchange component; 57, drive motor; 58, sealing door; 59, sealing baffle; 510, elastic retaining ring; 6, ash cleaning component; 61, ash cleaning pipe; 62, purge hole; 63, output fan; 7, dehumidification component; 71, dehumidification box; 72, partition; 73, primary air inlet; 74, secondary air inlet; 75, regeneration channel; 76, drying fan; 8, dehumidification structure; 81, drive shaft; 82, double-headed drive motor; 83, dehumidification turntable; 84, adsorption material. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0043] In addition, in the present invention, the descriptions of "first", "second", etc. 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 technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The present invention provides the following embodiments

[0045] Example 1

[0046] An embodiment of the present invention provides a heat exchange component, such as Figure 1-10 As shown, it includes: a heat exchange wheel frame 1, a plurality of fan-shaped partitions 11 are fixedly connected inside the heat exchange wheel frame 1, a plurality of heat exchange elements 2 are arranged between the plurality of fan-shaped partitions 11, a plurality of locking structures 3 are arranged on the side of the heat exchange wheel frame 1, the plurality of locking structures 3 cooperate with the plurality of heat exchange elements 2, a central tube 12 is arranged at the center of the heat exchange wheel frame 1, a rotating shaft 13 is bolted to the central tube 12, and a sealing structure 4 is arranged on the surface of the heat exchange wheel frame 1.

[0047] The working principle and beneficial effects of the above technical solution are as follows: when the flue gas exchanges heat with the primary air and the secondary air, the rotating shaft 13 drives the central tube 12 and the heat exchange wheel frame 1 to rotate. During the rotation process, the flue gas passes through a plurality of fan-shaped baffles 11 in sequence, and when passing through a plurality of heat exchange elements 2 between the fan-shaped baffles 11, the heat is transferred to the heat exchange elements 2. When the flue gas rotates to the primary air and the secondary air, the primary air and the secondary air pass through a plurality of fan-shaped baffles 11 in sequence, and the heat on the plurality of heat exchange elements 2 is transferred to the primary air and the secondary air. The heat exchange wheel frame 1 installs and replaces the heat exchange elements 2 inside it through the locking structure 3 on the side, and the sealing structure 4 is used to isolate the flue gas from the mutual circulation between the primary air and the secondary air when passing through the heat exchange wheel frame 1.

[0048] The present invention drives the heat exchange wheel frame 1 to rotate through the rotating shaft 13, and exchanges heat between the flue gas and the primary air and the secondary air in turn through the heat exchange element 2. This design can achieve a stable heat exchange process through cyclic heat exchange, and has the advantages of compact structure and fast heat exchange process. The heat exchange wheel frame 1 realizes the function of separate disassembly and replacement through the locking structure 3. This design can improve the utilization efficiency of the heat exchange element 2, avoid the complicated process of overall disassembly of the heat exchange wheel frame 1 when replacing the heat exchange element 2, reduce maintenance time, and make the maintenance process more flexible. The design of the sealing structure 4 can ensure that when the flue gas and the primary air and the secondary air are heat exchanged, no convection will occur between them, thereby ensuring the efficiency of heat exchange.

[0049] Example 2

[0050] On the basis of Example 1, the heat exchange element 2 includes a heat exchange energy storage plate 21, and a plurality of heat exchange energy storage plates 21 are stacked in sequence from large to small between the fan-shaped partitions 11, and a plurality of heat exchange energy storage plates 21 are provided with vertical corrugations 22 and oblique corrugations 23, and the vertical corrugations 22 and oblique corrugations 23 are staggered with each other.

[0051] The working principle and beneficial effects of the above technical solution are as follows: when the flue gas passes through the heat exchange element 2, it enters between adjacent heat exchange and energy storage plates 21 from the vertical corrugations 22, and then the flue gas branches into the oblique corrugations 23 to form turbulence, during which the heat of the flue gas is transferred to the heat exchange and energy storage plates 21, and then the primary air and the secondary air enter between adjacent heat exchange and energy storage plates 21 from the vertical corrugations 22 in reverse order, and branch into the oblique corrugations 23 again to form turbulence, during which the heat on the heat exchange and energy storage plates 21 is transferred to the primary air and the secondary air. The present invention adopts the vertical corrugations 22 and the oblique corrugations 23 to promote the formation of turbulence in the airflow therein, thereby enhancing the mixing and disturbance of the fluid, improving the heat exchange efficiency, and increasing the surface area of ​​the heat exchange and energy storage plate 21 through the corrugations, so that it has excellent heat exchange efficiency.

[0052] Example 3

[0053] On the basis of Example 1, the locking structure 3 includes a locking cover plate 31, which is hingedly connected to the heat exchange wheel frame 1, and one side of the locking cover plate 31 is fixedly connected to a plurality of high-temperature compression elastic parts 32, and the other end of the plurality of high-temperature compression elastic parts 32 is fixedly connected to a top plate 33, and the other side of the locking cover plate 31 is fixedly connected to a lifting sleeve 34, and a lifting lock rod 35 is slidably connected inside the lifting sleeve 34. A locking hole 36 is provided on the heat exchange wheel frame 1, and the locking hole 36 corresponds to the lifting lock rod 35. A baffle 37 is fixedly connected to the lifting lock rod 35, and a folding rod 38 is hingedly connected to the left and right sides of the baffle 37. A folding rod 39 is hingedly connected to the left and right sides of the lifting sleeve 34. The other ends of the folding rod 38 and the folding rod 39 are respectively hingedly connected to the two ends of the push handle 310, and a high-temperature compression elastic part 311 is provided between the folding rod 38 and the folding rod 39.

[0054] The beneficial effects of the above technical solution are as follows: when a number of heat exchange elements 2 are stacked between the fan-shaped partitions 11, the locking cover plate 31 is rotated to close with the heat exchange wheel frame 1, and then the heat exchange elements 2 are kept stacked under the action of the top plate 33 and the high-temperature compression elastic member 1 32, and then the push handles 310 on the left and right sides are pushed to make the folding rod 1 38 and the folding rod 2 39 rotate around the baffle 37 and the lifting sleeve 34 respectively, thereby making the longitudinal lengths of the folding rod 1 38, the push handle 310 and the folding rod 2 39 longer, pushing the lifting lock rod 35 to slide up along the lifting sleeve 34, and compressing The high temperature compression elastic member 2 311 applies elastic force to the folding rod 1 38 and the folding rod 2 39 in the opposite direction of rotation until the lifting lock rod 35 slides into the lock hole 36 to achieve locking. The folding rod 1 38 and the folding rod 2 39 continue to rotate beyond the maximum length and are limited. The high temperature compression elastic member 2 311 recovers part of the length. The high temperature compression elastic member 2 311 applies elastic force to the folding rod 1 38 and the folding rod 2 39 in the direction of rotation, so that the overall structure remains self-locking. When the locking cover 31 needs to be opened, the above steps are reversed.

[0055] The present invention utilizes a locking cover plate 31, a top plate 33 and a high-temperature compression elastic member 32 to seal the heat exchange element 2 in the heat exchange wheel frame 1. This design can not only allow the heat exchange element 2 in the heat exchange wheel frame 1 to be installed and replaced at will, but also the top plate 33 and the high-temperature compression elastic member 32 can keep the relative stacking of the heat exchange element 2 tight when the locking cover plate 31 is switched. At the same time, the design of the folding rod 1 38, the folding rod 2 39 and the high-temperature compression elastic member 2 311 can achieve self-locking through the principle of circular tangency. This design has a simple structure, is easy to operate, has high self-locking stability, and has high reliability.

[0056] Example 4

[0057] On the basis of Example 1, the sealing structure 4 includes a radial sealing strip 41, an axial sealing strip 42, a rotating shaft sealing ring 43 and an outer sealing strip 44. Several radial sealing strips 41 are bolted to the upper and lower ends of several fan-shaped partitions 11, respectively, several axial sealing strips 42 are bolted to the sides of several fan-shaped partitions 11, respectively, the rotating shaft sealing ring 43 is bolted to the center tube 12, and several outer sealing strips 44 are bolted to the outer circumference of the upper and lower sides of the heat exchange wheel frame 1.

[0058] The beneficial effects of the above technical scheme are as follows: the radial sealing strip 41 prevents the smoke and the primary air and the secondary air from leaking from the end face of the heat exchange wheel frame 1 when the rotating shaft 13 drives the heat exchange wheel frame 1 to rotate; the axial sealing strip 42 prevents the smoke and the primary air and the secondary air from leaking from the side of the heat exchange wheel frame 1 when the rotating shaft 13 drives the heat exchange wheel frame 1 to rotate; the rotating shaft sealing ring 43 prevents the smoke and the primary air and the secondary air from leaking from the heat exchange wheel frame 1 and the rotating shaft 13 when the rotating shaft 13 drives the heat exchange wheel frame 1 to rotate; the outer sealing strip 44 prevents the smoke and the primary air and the secondary air from leaking from the outer circumference of the heat exchange wheel frame 1 when the rotating shaft 13 drives the heat exchange wheel frame 1 to rotate. The present invention adopts the radial sealing strip 41, the axial sealing strip 42, the rotating shaft sealing ring 43 and the outer sealing strip 44 to separate the smoke, the primary air and the secondary air, so as to avoid the leakage of the primary air and the secondary air and cause the heat exchange efficiency to decrease.

[0059] Example 5

[0060] On the basis of Example 1, the embodiment of the present invention provides an air preheater, comprising: a rotary casing 5, wherein the upper and lower ends of the rotary casing 5 are fixedly connected to support beams 51, a smoke passage opening 52 is provided on one side of the support beam 51, and a primary air passage opening 53 and a secondary air passage opening 54 are provided on the other side of the support beam 51, the primary air passage opening 53 and the secondary air passage opening 54 are spaced apart from each other by radial beams 55, a heat exchange component 56 is provided in the rotary casing 5, and a rotating shaft 13 of the heat exchange component 56 is rotatably connected to the support beams 51 at the upper and lower ends, and a top support beam 51 is provided on the top support beam 51. A driving motor 57 is bolted, and the output end of the driving motor 57 is connected to the rotating shaft 13. A sealing door 58 is provided on the side of the rotary casing 5. A sealing baffle 59 is bolted to the supporting crossbeam 51, the radial crossbeam 55 and the rotary casing 5. The sealing baffle 59 cooperates with the radial sealing strip 41 and the axial sealing strip 42. The upper and lower ends of the rotary casing 5 are bolted to elastic retaining rings 510, and the elastic retaining ring 510 cooperates with the outer sealing retaining strip 44. A dust cleaning component 6 is provided on the rotary casing 5, and a dehumidification component 7 is provided at the primary air channel opening 53 and the secondary air channel opening 54;

[0061] It also includes a heat exchange regulation component, which is used to monitor and regulate the working state of the heat exchange component 56.

[0062] The beneficial effects of the above technical solution are as follows: when preheating the primary air and the secondary air, the smoke enters from the upper smoke channel opening 52, passes through the heat exchange component 56, and flows out from the lower smoke channel opening 52, while the primary air and the secondary air enter from the lower primary air channel opening 53 and the secondary air channel opening 54, pass through the heat exchange component 56, and flow out from the lower primary air channel opening 53 and the secondary air channel opening 54. When the smoke, the primary air, and the secondary air pass through the heat exchange component 56, the drive motor 57 drives the heat exchange component 56 to rotate on the supporting beam 51. After the smoke passes through the heat exchange component 56, the part of the heat exchange component 56 through which the smoke passes absorbs heat, and then the part of the heat exchange component 56 that absorbs heat rotates to the primary air channel opening 53. The primary air absorbs part of the heat through the heat exchange component 56, and then the part of the heat exchange component 56 that absorbs heat continues to rotate to the secondary air channel opening 54. The secondary air absorbs the remaining heat through the heat exchange component 56. Then, the part of the heat exchange component 56 that absorbs heat rotates to the smoke channel opening 52 again, and this part absorbs heat again and repeats the cycle. The supporting crossbeam 51 and the radial crossbeam 55 are used to separate the smoke channel opening 52, the primary air channel opening 53 and the secondary air channel opening 54. The sealing baffle 59 cooperates with the radial sealing strip 41 and the axial sealing strip 42, and the elastic retaining ring 510 and the outer sealing baffle 44 cooperate with each other to avoid air leakage between the smoke and the primary air and the secondary air. By opening the sealing door 58, the locking structure 3 of the heat exchange component 56 can be opened and closed, and the heat exchange element 2 can be taken out. The ash cleaning component 6 on the rotary casing 5 is used to remove the coal ash of the heat exchange component 56 by wind. The dehumidification component 7 on the primary air channel opening 53 and the secondary air channel opening 54 is used to dehumidify the primary air and the secondary air. The heat exchange control component is used to monitor the working state of the heat exchange component 56 and make timely adjustments according to the monitoring results;

[0063] The present invention utilizes the rotation of the heat exchange component 56 to realize the heat exchange between the flue gas and the primary air and the secondary air. The design can absorb and release heat through the rotation cycle, which can effectively increase the temperature of the primary air and the secondary air, and improve the combustion efficiency and the combustion temperature in the boiler. The design of the sealing door 58 can disassemble the partial structure of the heat exchange component 56 in the rotary casing 5, and can replace and maintain the damaged part in time without disassembling the overall structure. The design of the cleaning component 6 can ensure the continuous working ability of the heat exchange component 56, and avoid the heat exchange efficiency of the heat exchange component 56 being reduced due to the blockage of coal ash. The design of the dehumidification component 7 ensures the drying of the primary air and the secondary air, and avoids the primary air and the secondary air carrying water vapor into the heat exchange component 56, causing corrosion to the heat exchange component 56 and the adhesion of coal ash, thereby affecting the reduction of heat exchange efficiency. The design of the heat exchange control component can monitor the working status of the heat exchange component 56 in real time, and make timely adjustments to ensure the stable operation of the heat exchange component 56.

[0064] Example 6

[0065] On the basis of Example 5, the cleaning component 6 includes a cleaning pipe 61, which is arranged at the smoke channel opening 52. The cleaning pipe 61 passes through and is fixedly connected to the rotary casing 5 and the supporting beam 51. A plurality of purge holes 62 are provided on the cleaning pipe 61. The other end of the cleaning pipe 61 is flange-connected to an output fan 63, and the output fan 63 is bolted to the rotary casing 5.

[0066] The beneficial effects of the above technical solution are as follows: when coal ash accumulates in the heat exchange component 56, the cleaning component 6 is started, and the output fan 63 conveys air to the cleaning pipe 61. The plurality of purge holes 62 on the cleaning pipe 61 clean the coal ash of the heat exchange component 56 by releasing strong airflow. The heat exchange component 56 is fully covered by the cleaning of the heat exchange component 56 through relative rotation with the cleaning pipe 61. The present invention utilizes the cleaning pipe 61 and the purge holes 62 to clean the heat exchange component 56. This design has the characteristics of simple structure, and the cleaning is performed by air, which is pollution-free and has little impact on the heat exchange component 56, and no subsequent treatment is required.

[0067] Example 7

[0068] On the basis of Example 5, the dehumidification component 7 includes a dehumidification box 71, which is bolted to the primary air duct opening 53 and the secondary air duct opening 54. Two partitions 72 are fixedly connected in the dehumidification box 71, and the dehumidification structure 8 is rotatably connected to the two partitions 72. The left and right sides of the dehumidification box 71 are respectively provided with a primary air inlet 73 and a secondary air inlet 74. The top of the dehumidification box 71 is provided with regeneration channels 75 on the left and right sides. Drying fans 76 are installed on the two partitions, and the drying fans 76 are connected to the regeneration channels 75.

[0069] The dehumidification structure 8 includes a driving shaft 81, and the two driving shafts 81 respectively penetrate and are rotatably connected to the two partitions 72 and the regeneration channel 75. One end of the two driving shafts 81 is connected to a double-headed driving motor 82, and the double-headed driving motor 82 is bolted to the dehumidification box 71. The other ends of the two driving shafts 81 are respectively installed with dehumidification turntables 83, and a plurality of adsorption materials 84 are arranged in the dehumidification turntable 83. The dehumidification turntable 83 cooperates with the regeneration channel 75.

[0070] The beneficial effects of the above technical solution are as follows: the primary air and the secondary air enter from the primary air inlet 73 and the secondary air inlet 74 of the dehumidification box 71 respectively. After entering the dehumidification box 71, the primary air and the secondary air pass through the adsorption material 84 on the dehumidification rotary disk 83. The adsorption material 84 absorbs the water vapor contained in the primary air and the secondary air. Then, the primary air and the secondary air enter the heat exchange component 56 from the primary air channel opening 53 and the secondary air channel opening 54 respectively. The dehumidification rotary disk 83 is driven by the double-headed driving motor 82 and the driving shaft 81 to rotate at the same time. Most of the dehumidification rotary disk 83 absorbs water vapor from the primary air and the secondary air. When a small part of the dehumidification rotary disk 83 passes through the regeneration channel 75, the drying fan 76 reversely transports hot air into the regeneration channel 75. The hot air evaporates and discharges the water vapor adsorbed by the adsorption material 84 on the dehumidification rotary disk 83, thereby restoring its adsorption capacity.

[0071] The present invention utilizes a dehumidification rotary disk 83 and a driving shaft 81 to rotate and dehumidify the primary air and the secondary air. This design can absorb the water vapor contained in the primary air and the secondary air, and prevent the water vapor from condensing on the heat exchange element 2 of the heat exchange element 56 after the primary air and the secondary air carry the water vapor into the heat exchange component 56, causing corrosion of the heat exchange element 2 and adsorption of coal ash. At the same time, the design of the regeneration channel 75 and the drying fan 76 can keep the dehumidification rotary disk 83 saturated with adsorbed water vapor, and then discharge the water vapor through drying to restore the adsorption capacity, thereby ensuring the sustainable use of the dehumidification rotary disk 83 and greatly reducing the economic cost of the dehumidification process.

[0072] Example 8

[0073] Based on Example 5, the heat exchange control component includes a control module, a data processing module, a detection module and an execution module, and the detection module includes:

[0074] Temperature difference sensor 1: used to detect the difference between the inlet temperature and the outlet temperature of the smoke in the smoke passage opening 52, and is arranged on the supporting beam 51 on one side of the smoke passage opening 52;

[0075] Temperature difference sensor 2: used to detect the difference between the inlet temperature and the outlet temperature of the primary air in the primary air channel opening 53, and is arranged on the supporting beam 51 corresponding to the primary air channel opening 53;

[0076] Temperature difference sensor 3: used to detect the difference between the inlet temperature and the outlet temperature of the secondary air in the secondary air duct opening 54, and is arranged on the supporting beam 51 corresponding to the secondary air duct opening 54;

[0077] Flow sensor 1: used to detect the flow of smoke in the smoke passage opening 52, which is arranged on the supporting beam 51 on one side of the smoke passage opening 52;

[0078] Flow sensor 2: used to detect the flow rate of the primary air in the primary air channel opening 53, which is arranged on the radial beam 55 corresponding to the primary air channel opening 53;

[0079] Flow sensor three: used to detect the flow rate of the secondary air in the secondary air channel opening 54, which is arranged on the radial beam 55 corresponding to the secondary air channel opening 54;

[0080] Spacing sensor: used to detect the spacing between the heat exchange and energy storage plates 21, which is arranged on the supporting beam 51;

[0081] Pressure sensor: used to detect the pressure of the heat exchange and energy storage plate 21 at the upper and lower ends of the smoke channel opening 52, which is arranged on the supporting beam 51 on one side of the smoke channel opening 52;

[0082] The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution module to work based on the data results of the data processing module.

[0083] The control module controls the execution module based on the data results of the data processing module, including the following steps:

[0084] Step 1: Calculate the working state coefficient C of the heat exchange component 56 based on the detection values ​​of the temperature difference sensor 1, the temperature difference sensor 2, the temperature difference sensor 3, the flow sensor 1, the flow sensor 2, the flow sensor 3, the spacing sensor and the pressure sensor. h :

[0085] Where: C h is the working state coefficient of the heat exchange component 56, and η is the time compensation coefficient, the unit is s -1 , c1 is the specific heat capacity coefficient of flue gas, ρ1 is the density of flue gas, Q1 is the detection value of flow sensor 1, ΔT1 is the detection value of temperature difference sensor 1, c2 is the specific heat capacity coefficient of air, ρ2 is the density of air, Q2 is the detection value of flow sensor 2, ΔT2 is the detection value of temperature difference sensor 2, Q3 is the detection value of flow sensor 3, ΔT3 is the detection value of temperature difference sensor 3, P is the detection value of pressure sensor, and x is the detection value of spacing sensor;

[0086] Step 2: Data Processing Module Comparison C h and C h0 , when C h <C h0 Calculate the cleaning degree coefficient C of the heat exchange component when c , when C h ≥C h0 No processing is done when

[0087] Where: Cc is the cleaning degree coefficient of the heat exchange component 56, C h0 is the reference value of the working state coefficient of the heat exchange component 56, and ln is the natural logarithmic function;

[0088] Step 3: When 0.5 <C c ≤1, the cleaning degree is level one, when 0 <C c ≤0.5, the cleaning degree is level two, and the control module controls the execution module to drive the cleaning component 6 to clean according to the cleaning degree.

[0089] The beneficial effects of the above technical solution are as follows: after the heat exchange component 56 has been working for a long time, since the flue gas contains a lot of impurities, the impurities will gradually adhere to the heat exchange component 56, causing the heat exchange component 56 to be blocked, thereby reducing the heat exchange efficiency of the heat exchange component 56, increasing the pressure difference between the upper and lower ends of the heat exchange component 56, and reducing the temperature difference. Therefore, it is necessary to monitor the heat exchange component 56 in real time, judge the working state of the heat exchange component 56 through the monitoring results, and adjust the heat exchange component 56 in time;

[0090] The present invention utilizes a control module, a data processing module, a detection module and an execution module to monitor the heat exchange component 56. This design can ensure the working state of the heat exchange component 56 and avoid the heat exchange component 56 running for a long time without timely maintenance, thereby causing the life of the heat exchange component 56 to decrease.

[0091] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A heat exchange component, characterized in that: include: A heat exchange wheel frame (1) is provided, wherein a plurality of fan-shaped partitions (11) are fixedly connected inside the heat exchange wheel frame (1), a plurality of heat exchange elements (2) are arranged between the plurality of fan-shaped partitions (11), a plurality of locking structures (3) are arranged on the side of the heat exchange wheel frame (1), the plurality of locking structures (3) and the plurality of heat exchange elements (2) cooperate with each other, a central tube (12) is arranged at the center of the heat exchange wheel frame (1), a rotating shaft (13) is bolted to the central tube (12), and a sealing structure (4) is arranged on the surface of the heat exchange wheel frame (1).

2. A heat exchange assembly according to claim 1, characterized in that: The heat exchange element (2) comprises a heat exchange energy storage plate (21), wherein a plurality of heat exchange energy storage plates (21) are stacked in order from large to small between the fan-shaped partition plates (11), and each of the plurality of heat exchange energy storage plates (21) is provided with vertical corrugations (22) and oblique corrugations (23), and the vertical corrugations (22) and the oblique corrugations (23) are interlaced with each other.

3. A heat exchange assembly according to claim 1, characterized in that: The locking structure (3) comprises a locking cover plate (31), the locking cover plate (31) is hingedly connected to the heat exchange wheel frame (1), one side of the locking cover plate (31) is fixedly connected to a plurality of high-temperature compression elastic members (32), the other end of the plurality of high-temperature compression elastic members (32) is fixedly connected to a top plate (33), the other side of the locking cover plate (31) is fixedly connected to a lifting sleeve (34), a lifting locking rod (35) is slidably connected inside the lifting sleeve (34), and a locking hole (36) is provided on the heat exchange wheel frame (1). The lock hole (36) corresponds to the lifting lock rod (35), a baffle (37) is fixedly connected to the lifting lock rod (35), and a folding rod (38) is hingedly connected to the left and right sides of the baffle (37), and a folding rod (39) is hingedly connected to the left and right sides of the lifting sleeve (34), and the other ends of the folding rod (38) and the folding rod (39) are hingedly connected to the two ends of the push handle (310), respectively, and a high-temperature compression elastic member (311) is provided between the folding rod (38) and the folding rod (39).

4. A heat exchange assembly according to claim 1, characterized in that: The sealing structure (4) comprises radial sealing strips (41), axial sealing strips (42), a rotating shaft sealing ring (43) and an outer sealing strip (44); the plurality of radial sealing strips (41) are respectively bolted to the upper and lower ends of the plurality of sector-shaped baffles (11); the plurality of axial sealing strips (42) are respectively bolted to the side surfaces of the plurality of sector-shaped baffles (11); the rotating shaft sealing ring (43) is bolted to the central tube (12); and the plurality of outer sealing strips (44) are all bolted to the outer circumferences of the upper and lower sides of the heat exchange wheel frame (1).

5. An air preheater, comprising a heat exchange assembly according to any one of claims 1 to 4, characterized in that: The invention comprises: a rotary casing (5), wherein both upper and lower ends of the rotary casing (5) are fixedly connected to support beams (51), one side of the support beam (51) is provided with a smoke passage opening (52), and the other side of the support beam (51) is provided with a primary air passage opening (53) and a secondary air passage opening (54), the primary air passage opening (53) and the secondary air passage opening (54) are spaced apart from each other by radial beams (55), a heat exchange component (56) is provided inside the rotary casing (5), a rotating shaft (14) of the heat exchange component (56) is rotatably connected to the support beams (51) at the upper and lower ends, a driving motor (57) is bolted to the top support beam (51), and the driving motor (57) is connected to the top support beam (51), and the driving motor (57) is connected to the top support beam (51). The output end of the machine (57) is connected to the rotating shaft (14); a sealing door (58) is provided on the side of the rotary casing (5); a sealing baffle (59) is bolted to the supporting crossbeam (51), the radial crossbeam (55) and the rotary casing (5); the sealing baffle (59) cooperates with the radial sealing strip (41) and the axial sealing strip (42); elastic retaining rings (510) are bolted to the upper and lower ends of the rotary casing (5); the elastic retaining rings (510) cooperate with the outer sealing strip (44); a dust cleaning component (6) is provided on the rotary casing (5); and a dehumidification component (7) is provided at the primary air channel opening (53) and the secondary air channel opening (54); It also includes a heat exchange control component, which is used to monitor and adjust the working state of the heat exchange component (56).

6. An air preheater according to claim 5, characterized in that: The ash cleaning component (6) comprises an ash cleaning pipe (61), which is arranged at the smoke passage opening (52), penetrates through and is fixedly connected to the rotary casing (5) and the supporting crossbeam (51), is provided with a plurality of purge holes (62), and the other end of the ash cleaning pipe (61) is flange-connected to an output fan (63), which is bolted to the rotary casing (5).

7. An air preheater according to claim 5, characterized in that: The dehumidification assembly (7) comprises a dehumidification box (71), the dehumidification box (71) is bolted to the primary air channel opening (53) and the secondary air channel opening (54), two partitions (72) are fixedly connected in the dehumidification box (71), and the dehumidification structure (8) is rotatably connected to the two partitions (72), the left and right sides of the dehumidification box (71) are respectively provided with a primary air inlet (73) and a secondary air inlet (74), the top of the dehumidification box (71) is provided with a regeneration channel (75) on the left and right sides, and a drying fan (76) is installed on both partitions, and the drying fan (76) is connected to the regeneration channel (75).

8. An air preheater according to claim 7, characterized in that: The dehumidification structure (8) includes a driving shaft (81), and the two driving shafts (81) respectively penetrate and are rotatably connected to the two partitions (72) and the regeneration channel (75). One end of the two driving shafts (81) is connected to a double-headed driving motor (82), and the double-headed driving motor (82) is bolted to the dehumidification box (71). The other ends of the two driving shafts (81) are respectively installed with a dehumidification rotary disk (83), and a plurality of adsorption materials (84) are arranged in the dehumidification rotary disk (83). The dehumidification rotary disk (83) and the regeneration channel (75) cooperate with each other.

9. The air preheater according to claim 5, characterized in that: The heat exchange control component includes a control module, a data processing module, a detection module and an execution module. The detection module includes: Temperature difference sensor 1: used for detecting the difference between the inlet temperature and the outlet temperature of the smoke in the smoke passage opening (52), and arranged on a supporting beam (51) on one side of the smoke passage opening (52); Temperature difference sensor 2: used for detecting the difference between the inlet temperature and the outlet temperature of the primary air in the primary air channel opening (53), and arranged on the supporting crossbeam (51) corresponding to the primary air channel opening (53); Temperature difference sensor 3: used to detect the difference between the inlet temperature and the outlet temperature of the secondary air in the secondary air passage opening (54), and arranged on the supporting crossbeam (51) corresponding to the secondary air passage opening (54); Flow sensor 1: used for detecting the flow rate of smoke in the smoke passage opening (52), which is arranged on a supporting beam (51) at one side of the smoke passage opening (52); Flow sensor 2: used for detecting the flow rate of the primary air in the primary air channel opening (53), and arranged on a radial crossbeam (55) corresponding to the primary air channel opening (53); Flow sensor three: used for detecting the flow rate of the secondary air in the secondary air channel opening (54), which is arranged on the radial crossbeam (55) corresponding to the secondary air channel opening (54); Spacing sensor: used for detecting the spacing distance between the heat exchange and energy storage plates (21), which is arranged on the supporting beam (51); A pressure sensor: used to detect the pressure at the upper and lower ends of the heat exchange energy storage plate (21) at the smoke passage opening (52), and arranged on a supporting beam (51) at one side of the smoke passage opening (52); The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution module to work based on the data results of the data processing module.

10. An air preheater according to claim 9, characterized in that: The control module controls the execution module based on the data results of the data processing module, including the following steps: Step 1: Calculate the working state coefficient C of the heat exchange component (56) based on the detection values ​​of the temperature difference sensor 1, the temperature difference sensor 2, the temperature difference sensor 3, the flow sensor 1, the flow sensor 2, the flow sensor 3, the spacing sensor and the pressure sensor h : Where: C h is the working state coefficient of the heat exchange component (56), η is the time compensation coefficient, c1 is the specific heat capacity coefficient of the flue gas, ρ1 is the density of the flue gas, Q1 is the detection value of the flow sensor 1, ΔT1 is the detection value of the temperature difference sensor 1, c2 is the specific heat capacity coefficient of the air, ρ2 is the density of the air, Q2 is the detection value of the flow sensor 2, ΔT2 is the detection value of the temperature difference sensor 2, Q3 is the detection value of the flow sensor 3, ΔT3 is the detection value of the temperature difference sensor 3, P is the detection value of the pressure sensor, and x is the detection value of the spacing sensor; Step 2: Data Processing Module Comparison C h and C h0 , when C h <C h0 Calculate the cleaning degree coefficient C of the heat exchange component when c , when C h ≥C h0 No processing is done when Where: C c is the cleaning degree coefficient of the heat exchange component (56), C h0 is the working state coefficient reference value of the heat exchange component (56), and ln is a natural logarithmic function; Step 3: When 0.5 <C c ≤1, the cleaning degree is level one, when 0 <C c ≤0.5, the cleaning degree is level two, and the control module controls the execution module to drive the dust cleaning component (6) to perform cleaning according to the cleaning degree.

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