Flue gas waste heat recovery device

Abstract

The utility model relates to a flue gas waste heat recovery device which comprises a box body, a heat exchange part and a turbulent flow part, the heat exchange part and the turbulent flow part are sequentially contained in the box body in the flue gas circulation direction, and the flue gas waste heat recovery device further comprises a filtering part communicated with the box body and arranged on the upstream of the heat exchange part. Flue gas can circulate in the flue gas channel; the filter screen is arranged in the filter bin in the smoke passing direction; the vibration assembly comprises a vibration element which is arranged in the filter bin at an interval with the filter screen; and the driving motor is used for outputting driving force capable of driving the vibration element to reciprocate relative to the filter screen, so that the vibration element can repeatedly strike the filter screen.

Description

Technical Field

[0001] The present disclosure relates to the technical field of boiler flue gas treatment, and specifically, to a waste heat recovery device for flue gas. Background Art

[0002] A boiler is an energy conversion device in a thermal power plant, which mainly converts the chemical energy, electrical energy, etc. in the fuel into heat energy, and outputs high-temperature steam or organic heat carrier through the boiler. Among them, the boiler that generates steam is called a steam boiler. The fuel combustion will generate a large amount of flue gas, and the exhaust gas temperature is generally between 170° and 225°. Usually, it is directly discharged through the exhaust pipe, resulting in a large loss of heat energy. Therefore, a flue gas waste heat recovery device is needed to recover and utilize the heat contained in the flue gas.

[0003] For traditional boiler flue gas waste heat recovery devices, most of them will install a filter screen in front of the heat exchange tube to remove dust and impurities in the flue gas, so as to avoid the adhesion of dust and impurities on the inner wall of the heat exchange tube and affect the heat exchange effect. However, the filter screens of existing boiler flue gas waste heat recovery devices are mostly fixed and installed by bolts, which is not convenient for maintaining and replacing the filter screen. During the long-term use of the filter screen, the dust on the filter screen is easy to block the filter screen, affecting the filtering effect of the filter screen and the fluidity of the flue gas, and will have an adverse impact on other components arranged downstream of the filter screen. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a waste heat recovery device for flue gas, which can at least partially solve the technical problems in the related art.

[0005] To achieve the above purpose, the present disclosure provides a waste heat recovery device for flue gas. Optionally, it includes a box body, a heat exchange part and a flow disturbance part that are sequentially accommodated in the box body along the flue gas flow direction, and also includes a filtering part that is communicated with the box body and arranged upstream of the heat exchange part. Among them, the filtering part includes:

[0006] A filter chamber, configured as a hollow shell structure for the flue gas to flow through;

[0007] A filter screen, arranged in the filter chamber facing the flue gas passing direction;

[0008] A vibration assembly, including a vibration element arranged in the filter chamber at an interval from the filter screen; and

[0009] A driving motor, used to output a driving force capable of driving the vibration element to reciprocate relative to the filter screen, so that the vibration element can repeatedly strike the filter screen.

[0010] Optionally, the vibration element is an eccentric cam whose axis direction is perpendicular to the flue gas passing direction, and the driving motor is used to drive the eccentric cam to rotate around its axis.

[0011] Optionally, the vibration assembly further includes a mounting shaft connected to the output end of the drive motor. The mounting shaft is vertically arranged in the filter chamber along a direction perpendicular to the smoke passage direction and can rotate about its own axis, and the eccentric cam is coaxially fixed on the mounting shaft.

[0012] Optionally, the vibration assembly further includes:

[0013] A first frame arranged in the filter chamber facing the smoke passage direction, and the mounting shaft is rotatably mounted on the first frame; and

[0014] A first elastic member elastically connected between the first frame and the filter net along the smoke passage direction.

[0015] Optionally, the cross-section of the first frame is configured as a U-shaped structure with an opening facing the filter net, and the filtering part further includes:

[0016] A second frame facing the smoke passage direction and embedded at the open end of the U-shaped structure, and spaced from the closed end of the U-shaped structure. The first elastic member is connected between the first frame and the second frame, and the filter net is mounted on the second frame; and

[0017] A pressing piece, one end of which is rotatably mounted on the second frame, and the other end forms a free end for pressing or disengaging from the filter net.

[0018] Optionally, an opening for the first frame to pass through is formed on the side wall of the filter chamber, and the filtering part further includes a limiting block arranged on the filter chamber near the opening, and the limiting block is configured to be able to expand and contract in a direction close to or away from the opening.

[0019] Optionally, the heat exchange part includes:

[0020] A heat exchange tube configured as a coiled tube and communicatively arranged between the filter chamber and the turbulence part for flowing the flue gas; and

[0021] A heat exchange tank for accommodating a heat exchange medium, and the heat exchange tube passes through the heat exchange tank to contact and exchange heat with the heat exchange medium.

[0022] Optionally, the turbulence part includes:

[0023] A turbulence chamber communicatively arranged downstream of the heat exchange part; and

[0024] A plurality of turbulence plates accommodated in the turbulence chamber, and two adjacent turbulence plates are arranged in a staggered manner.

[0025] Optionally, the spoiler part further includes an activated carbon adsorption net accommodated in the spoiler bin, and the activated carbon adsorption net is disposed upstream of the plurality of spoiler plates at intervals facing the smoke passing direction.

[0026] Optionally, the spoiler part further includes a dust suction pad attached to the spoiler plate.

[0027] Through the above technical solution, the driving motor drives the vibration element to reciprocally strike the shock filter net, so as to shake off impurities such as soot attached to the filter net, avoid the blockage of the filter net by impurities such as soot and affect the filtering effect of the filter net, ensure the filtering effect of the filter net, reduce the working intensity of the heat exchange part and the spoiler part arranged downstream of the filtering part in the waste heat recovery device, and ensure the treatment effect of the waste heat recovery device on the flue gas.

[0028] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0029] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0030] Figure 1 is the overall structural schematic diagram of the waste heat recovery device provided by the exemplary embodiment of the present disclosure

[0031] Figure 2 is Figure 1 the enlarged view of part A in

[0032] Figure 3 is the cross-sectional view of the waste heat recovery device provided by the exemplary embodiment of the present disclosure

[0033] Figure 4 、 Figure 5 and Figure 7 are the partial structural schematic diagrams of the waste heat recovery device provided by the exemplary embodiment of the present disclosure

[0034] Figure 6 is Figure 5 the enlarged view of part B in

[0035] Description of the Reference Numerals

[0036] 1 - Filtering section; 11 - Filtering bin; 111 - First smoke hole; 12 - Filter net; 13 - Vibration assembly; 131 - Vibration element; 132 - Mounting shaft; 133 - First frame; 1331 - First side; 1332 - Second side; 1333 - Third side; 134 - First elastic member; 135 - Handle; 136 - Ash collection trough; 137 - First guide rod; 14 - Driving motor; 15 - Second frame; 151 - Groove; 16 - Pressing piece; 161 - Rotating shaft; 17 - Limiting assembly; 171 - Limiting block; 172 - Second elastic member; 173 - Second guide rod; 174 - Mounting seat; 18 - Opening; 2 - Heat exchange section; 21 - Heat exchange tube; 22 - Heat exchange trough; 3 - Turbulence section; 31 - Turbulence bin; 32 - Turbulence plate; 33 - Activated carbon adsorption net; 34 - Dust absorption pad; 4 - Box body; 41 - Box door; 51 - Smoke inlet pipe; 52 - Smoke outlet pipe; 6 - Partition board; 61 - Second smoke hole. Detailed implementation manners

[0037] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0038] In the present disclosure, unless otherwise stated, the directional terms such as "inside" and "outside" refer to the outline of the corresponding component itself; the directional terms such as "upper", "lower", "top", "bottom", "horizontal", and "vertical" are defined based on the usage habits of the waste heat recovery device provided by the present disclosure. Specifically, with reference to Figure 1 the direction of the drawing shown, the side pointed by the Z arrow is the upper and top, and the opposite is the lower and bottom. In addition, the Z direction refers to the height direction of the box body, the X direction refers to the width direction of the box body, and the Y direction refers to the length direction of the box body and the smoke passing direction; the X and Y directions refer to the horizontal direction, and the Z direction refers to the vertical direction. The terms such as "first" and "second" used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance. In addition, when the following description refers to the accompanying drawings, the same reference numerals in different drawings represent the same or similar elements.

[0039] Refer to Figures 1-7, the present disclosure provides a waste heat recovery device for flue gas. The waste heat recovery device may include a box body 4, a heat exchange part 2, a flow disturbance part 3, and a filtration part 1. The heat exchange part 2 and the flow disturbance part 3 may be sequentially accommodated in the box body 4 along the flue gas flow direction. The filtration part 1 may communicate with the box body 4 and be arranged upstream of the heat exchange part 2. By this setting method, the filtration part 1, the heat exchange part 2, and the flow disturbance part 3 can be integrated on the box body 4, thereby improving the overall effect of the waste heat recovery device. Among them, the filtration part 1 may include a filtration chamber 11, a filter net 12, a vibration assembly 13, and a driving motor 14. The smoke inlet pipe 51 may be arranged upstream of the filtration chamber 11 to introduce flue gas into the filtration chamber 11. The filtration chamber 11 may be used for the flow of flue gas, and the filtration chamber 11 may be constructed as a hollow shell structure. A first smoke hole 111 may be formed on the filtration chamber 11, and the first smoke hole 111 may communicate with the heat exchange tube 21 mentioned below to be able to discharge the flue gas to the heat exchange part 2. The filter net 12 may be arranged in the filtration chamber 11 facing the smoke passing direction to filter the flue gas, preventing dust and soot from entering the heat exchange tube 21 mentioned below and adhering to the inner wall of the heat exchange tube 21, resulting in the thickening of the inner wall of the heat exchange tube 21 and reducing the heat exchange effect. The vibration assembly 13 may include a vibration element 131 arranged in the filtration chamber 11 at an interval from the filter net 12. The vibration assembly 13 may further include a driving motor 14. The driving motor 14 may be used to output a driving force capable of driving the vibration element 131 to reciprocate relative to the filter net 12, so that the vibration element 131 can repeatedly strike the filter net 12, thereby shaking off impurities such as soot adhering to the filter net 12, preventing impurities such as soot from blocking the filter net 12 and affecting the filtering effect of the filter net 12, and ensuring the filtering effect of the filter net 12 and the fluidity of the flue gas.

[0040] Through the above technical solution, the driving motor 14 drives the vibration element 131 to reciprocally strike and vibrate the filter net 12 to shake off impurities such as soot adhering to the filter net 12, preventing impurities such as soot from blocking the filter net 12 and having an adverse impact on the filtering effect of the filter net 12, so as to ensure the filtering effect of the filter net 12, reduce the working intensity of the heat exchange part 2 and the flow disturbance part 3 arranged downstream of the filtration part 1 in the waste heat recovery device, and ensure the treatment effect of the waste heat recovery device on the flue gas.

[0041] Refer to Figure 4 and Figure 5, the vibration component 131 can be an eccentric cam with its axis perpendicular to the smoke passage direction, that is, the axis of the eccentric cam extends along the Z direction. The driving motor 14 is used to drive the eccentric cam to rotate around its axis, so that the eccentric cam can rotate automatically and have different distances from the filter net 12 along the ventilation direction during the rotation process, hitting and vibrating the filter net 12 reciprocally, effectively avoiding the accumulation of debris on the filter net 12 and affecting debris collection. The structure is simple and easy to implement. According to the embodiments provided by the present disclosure, the vibration frequency and amplitude of the filter net 12 can be controlled by adjusting the rotation speed of the driving motor 14 and the geometric shape of the eccentric cam, so as to adapt to different working requirements.

[0042] Referring to Figure 4 , the vibration assembly 13 can also include a mounting shaft 132 connected to the output end of the driving motor 14. The mounting shaft 132 is erected in the filter chamber 11 perpendicular to the smoke passage direction, that is, it can extend along the height direction of the box body 4, and the mounting shaft 132 can rotate around its own axis in the box body 4. The eccentric cam can be coaxially fixed on the mounting shaft 132, so that when the driving motor 14 drives the mounting shaft 132 to rotate, the mounting shaft 132 can drive the eccentric cam to rotate, effectively ensuring the driving effect on the eccentric cam and the stability of the mounting position of the eccentric cam.

[0043] Referring to Figures 4-6 , the vibration assembly 13 can also include a first frame 133 and a first elastic member 134. The first frame 133 can be arranged in the filter chamber 11 facing the smoke passage direction, and the mounting shaft 132 can be rotatably mounted on the first frame 133 to ensure the stability of the mounting position of the mounting shaft 132 and improve the vibration effect on the filter net 12. The first elastic member 134 can be elastically connected between the first frame 133 and the filter net 12 along the smoke passage direction. In this way, through the elastic expansion and contraction of the first elastic member 134, the mutual approach and separation between the filter net 12 and the first frame 133 are driven. After the eccentric cam pushes the filter net 12 to move away from the first frame 133 and the driving force applied by the eccentric cam to the filter net 12 is withdrawn, the filter net 12 automatically moves towards the first frame 133 to prepare for the next push of the eccentric cam, thereby realizing the repeated vibration of the filter net 12.

[0044] Referring to Figure 4 and Figure 5, the cross-section of the first frame 133 is configured as a U-shaped structure with an opening facing the filter net 12. The U-shaped structure may include a first side 1331 and a second side 1332 at the open end. The U-shaped structure may further include a third side 1333 at the closed end and connected between the first side 1331 and the second side 1332. Among them, the first side 1331 and the second side 1332 may be spaced apart along the height direction of the box body 4, and the third side 1333 is connected between the first side 1331 and the second side facing the ventilation direction. The filtering part 1 may further include a second frame 15 and a pressing piece 16. The second frame 15 may be used to install the filter net 12, and the second frame 15 may face the smoke passing direction and be embedded at the open end of the U-shaped structure, and be spaced apart from the closed end of the U-shaped structure, that is, the second frame 15 may be embedded between the first side 1331 and the second side 1332, and be spaced apart from the third side 1333 along the Y direction. The first elastic member 134 may be connected between the first frame 133 and the second frame 15. In this way, the first elastic member 134 can drive the second frame 15 to drive the movement of the filter net 12, avoiding the direct contact between the first elastic member 134 and the filter net 12, thereby ensuring the stability of the filter net 12 and prolonging the service life of the filter net 12. As Figure 6 shown, the first elastic member 134 may be a compression spring elastically connected between the first frame 133 and the second frame 15. In order to ensure that the first elastic member 134 can expand and contract along the preset direction (i.e., along the length direction of the box body 4), a first guide rod 137 may be connected and arranged between the first frame 133 and the second frame 15, and the first elastic member 134 may be sleeved on the first guide rod 137, thereby ensuring the stability of the first elastic member 134 during use, so that the first elastic member 134 drives the second frame 15 to move horizontally during use. To improve the driving effect and thus ensure the vibration intensity of the filter net 12, a plurality of first elastic members 134 may be spaced apart and arranged between the first frame 133 and the second frame 15.

[0045] Refer to Figure 4 , Figure 5 and Figure 7, a groove 151 can be formed on the second frame 15. One end of the pressing piece 16 can be rotatably mounted on the second frame 15 through a rotating shaft 161, and the other end of the pressing piece 16 can be formed as a free end. The filter screen 12 can be embedded in the groove 151. In this way, when the filter screen 12 is required for installation, the pressing piece 16 can be driven to rotate towards the direction close to the second frame 15 so that the free end presses on the filter screen 12. When the filter screen 12 needs to be disassembled, the pressing piece 16 can be driven to rotate away from the second frame 15 so that the free end is used to disengage from the filter screen 12, so that the filter screen 12 can be disassembled from the second frame 15. Through this installation method, the detachable connection between the filter screen 12 and the second frame 15 is realized, which is convenient for the maintenance and repair of the waste heat recovery device. Along the circumferential direction of the second frame 15, a plurality of pressing pieces 16 can be arranged, and the plurality of pressing pieces 16 can be evenly distributed at equal intervals, which can improve the stability of the filter screen 12 during installation.

[0046] Furthermore, referring to Figure 5 , a dust collecting groove 136 can be arranged on one side of the second side 1332 close to the second frame 15. By arranging the dust collecting groove 136, the impurities intercepted by the filter screen 12 during filtration and the dust shaken off when the eccentric cam strikes and vibrates the filter screen 12 can be collected. Moreover, the dust collecting groove 136 can be taken out together with the first frame 133 when the first frame 133 is taken out from the filter chamber 11, so as to facilitate the timely cleaning and transfer of the impurities collected in the dust collecting groove 136, and avoid the accumulation of the impurities filtered by the filter screen 12 at the filter screen 12, which affects the filtering effect of the filter screen 12.

[0047] Referring to Figure 1 , Figure 3 and Figure 4 , an opening 18 through which the first frame 133 passes is formed on the side wall of the filter chamber 11. The first frame 133 can be assembled into the filter chamber 11 through the opening 18, or taken out from the filter chamber 11 through the opening 18 when there is a need for maintenance. The filtering part 1 can further include a limiting block 171 arranged on the filter chamber 11 close to the opening 18. The limiting block 171 can be configured to be able to expand and contract in the direction close to or away from the opening 18. When the limiting block 171 extends in the direction close to the opening 18, the limiting block 171 can resist at the opening 18 to prevent the first frame 133 from disengaging from the opening 18, and improve the stability of the first frame 133 installed in the filter chamber 11. When the first frame 133 needs to be disassembled, the limiting block 171 can be driven to retract in the direction away from the opening 18 to avoid the first frame 133.

[0048] The waste heat recovery device provided by the present disclosure may further include a limiting component 17. The limiting component 17 may include the above-mentioned limiting block 171, the second elastic member 172 and the mounting base 174. The mounting base 174 may be fixed on the top surface of the filter chamber 11, and the second elastic member 172 may be elastically connected between the limiting block 171 and the mounting base 174 along the width direction of the box body 4, so that the first frame 133 can expand and contract in the direction close to the opening 18 under the action of the elastic force of the second elastic member 172. Specifically, when the first frame 133 is installed in the filter chamber 11 through the opening 18, when the limiting block 171 is pushed by the first frame 133 and gradually moves downward with the first frame 133 and gradually moves away from the opening 18, the second elastic member 172 contracts to store elastic potential energy. When the first frame 133 is assembled in place, the second elastic member 172 releases the elastic potential energy and expands to push the limiting block 171 in the direction close to the opening 18, so as to realize the automatic reset of the limiting block 171 and form an occlusion for the first frame 133. In order to improve the stability of the second elastic member 172 when it undergoes elastic deformation, a second guide rod 173 along the width direction of the box body 4 may be provided on the mounting base 174, and the second elastic member 172 may be a compression spring, and the compression spring may be sleeved on the second guide rod 173, so as to ensure that the second elastic member 172 can always move along the X direction when driving the limiting block 171, so as to improve the driving accuracy of the limiting block 171. Refer to Figure 4 and Figure 5 , when the first frame 133 includes the above-mentioned first side 1331, a handle 135 may be provided on the first side 1331 to facilitate the removal or installation of the first frame 133 from the filter chamber 11. In order to improve the limiting effect on the first frame 133, in the embodiment provided by the present disclosure, two limiting components 17 may be provided near each other, and the two limiting components 17 may be arranged on the opposite side of the opening 18 along the width direction of the box body 4.

[0049] Furthermore, refer to Figure 2 , in the embodiment provided by the present disclosure, the limiting block 171 may be configured as a wedge-shaped structure that gradually inclines away from the opening 18 from bottom to top. During the movement of the first frame 133, there will be no problem of stress concentration with the limiting block 171. At the same time, the bottom surface of the limiting block 171 may just fit the top surface of the first frame 133 when the limiting block 171 extends to the opening 18, so as to further improve the reliability of the installation of the first frame 133.

[0050] Furthermore, refer to Figure 4 and Figure 2, when the first frame 133 includes the first side 1331 mentioned above, in the XY plane, the outer contour structure of the first side 1331 can match the inner contour structure of the opening 18, so as to prevent foreign objects from entering the filter chamber 11 through the opening 18, and at the same time, it can also improve the overall effect of the filter part 1.

[0051] Referring to Figure 1 and Figure 3 , the heat exchange part 2 can include a heat exchange tube 21 and a heat exchange tank 22 arranged in the box body 4. The heat exchange tube 21 can be communicatively arranged between the filter chamber 11 and the turbulence part 3 for the flow of flue gas. The heat exchange tube 21 can be configured as a coiled tube to extend the flow path of the flue gas in a limited space and provide the heat exchange effect between the heat exchange medium and the flue gas in the heat exchange tube 21. The heat exchange tank 22 can be used to accommodate the heat exchange medium, and the heat exchange tube 21 can penetrate through the heat exchange tank 22 to contact and exchange heat with the heat exchange medium. In the present disclosure, the heat exchange tube 21 can be accommodated in the heat exchange tank 22, and the heat exchange tube 21 can be completely immersed in the heat exchange medium, so that the flue gas is always in heat exchange with the heat exchange medium during the flow in the heat exchange tube 21 to ensure the sufficiency of heat exchange. According to the embodiment provided by the present disclosure, the heat exchange medium can be water or the like, and the present disclosure does not limit this. A heat preservation cavity can be arranged at the bottom of the heat exchange tank 22 in the box body 4 to keep the heat exchange medium in the heat exchange tank 22 warm, further improving the utilization rate of the heat in the flue gas, increasing the recovery rate of the waste heat of the flue gas, and avoiding the waste of the heat in the flue gas. As Figure 1 shown, a box door 41 hinged to the body of the box body 4 can be arranged on the box body 4. By rotating the box door 41, the box body 4 can be opened or closed to be able to repair and maintain the components arranged in the box body 4.

[0052] Referring to Figure 1 and Figure 3, the spoiler section 3 may include a spoiler chamber 31 provided in the box body 4 and a plurality of spoiler plates 32. The spoiler chamber 31 may be communicatively provided downstream of the heat exchange section 2. In the present disclosure, the waste heat recovery device may include a partition plate 6 erected inside the box body 4 facing the smoke passing direction, so as to be able to divide the box body 4 into the above-mentioned heat exchange section 2 and spoiler section 3. A second smoke hole 61 may be formed in the partition plate 6 to allow the flue gas to pass through the heat exchange section 2 to the spoiler section 3. In the present disclosure, in order to ensure the smoothness of the flue gas flow process, the second smoke hole 61 may be communicated with the above-mentioned heat exchange tubes 21. The spoiler chamber 31 may be a structure formed on the body of the box body 4, so as to ensure the stability of the installation position of the spoiler plates 32 and the overall effect of the device. In the present disclosure, the plurality of spoiler plates 32 may be accommodated in the spoiler chamber 31 at intervals in the vertical direction, and two adjacent spoiler plates 32 are arranged in a staggered manner, so that the flue gas can be subjected to multiple flow deflections and decelerations by the plurality of spoiler plates 32 when flowing through the spoiler chamber 31, so as to facilitate the dust suction pad 34 and the activated carbon adsorption net 33 mentioned below to better adsorb and treat harmful substances in the flue gas.

[0053] Referring to Figure 3 , the spoiler section 3 may further include an activated carbon adsorption net 33 accommodated in the spoiler chamber 31. The activated carbon adsorption net 33 may be arranged at intervals facing the smoke passing direction upstream of the plurality of spoiler plates 32, so as to better adsorb and treat harmful substances in the flue gas and improve the treatment effect of the waste heat recovery device on the flue gas. In the embodiment provided by the present disclosure, referring to Figure 3 , in the XY plane, the cross-sectional structure of the activated carbon adsorption net 33 may match the cross-sectional structure of the spoiler chamber 31, so as to ensure that the flue gas completely passes through the activated carbon adsorption net 33 for filtration and adsorption when flowing downstream to the spoiler section 3. Referring to Figure 3 , a smoke exhaust pipe 52 may be communicatively provided on the box body 4. The smoke exhaust pipe 52 may be provided above the activated carbon adsorption net 33 and downstream of the activated carbon adsorption net 33 for discharging the flue gas flowing through the activated carbon adsorption net 33.

[0054] Referring to Figure 3 , the spoiler section 3 may further include a dust suction pad 34 attached to the spoiler plate 32, so as to adsorb and treat harmful substances in the flue gas through the dust suction pad and ensure the cleanliness of the flue gas discharged from the waste heat recovery device to the downstream. In the embodiment provided by the present disclosure, the outer contour structure of the dust suction pad 34 may match the outer contour structure of the spoiler plate 32, which can ensure the adsorption effect of the dust suction pad 34 on the flue gas in the spoiler chamber 31 while avoiding the dust suction pad 34 from hindering the normal flow of the flue gas in the spoiler chamber 31.

[0055] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0056] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0057] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A flue gas waste heat recovery device, characterized in that: The invention comprises a box body, a heat exchange part and a spoiler part sequentially contained in the box body along the smoke flow direction, and a filter part connected to the box body and arranged upstream of the heat exchange part, wherein the filter part comprises: The filter chamber is constructed as a shell structure with a hollow interior for circulating smoke; A filter screen is arranged in the filter chamber facing the smoke passing direction; A vibration assembly, comprising a vibration element disposed in the filter bin at a distance from the filter screen; and The driving motor is used to output a driving force capable of driving the vibration element to reciprocate relative to the filter screen, so that the vibration element can repeatedly hit the filter screen.

2. The waste heat recovery device according to claim 1, characterized in that: The vibration element is an eccentric cam whose axial direction is perpendicular to the smoke passing direction, and the driving motor is used to drive the eccentric cam to rotate around its axis.

3. The waste heat recovery device according to claim 2, characterized in that: The vibration assembly also includes a mounting shaft connected to the output end of the drive motor. The mounting shaft is rotatable around its own axis and is vertically arranged in the filter bin along a direction perpendicular to the smoke passing direction. The eccentric cam is coaxially fixed on the mounting shaft.

4. The waste heat recovery device according to claim 3, characterized in that: The vibration assembly also includes: A first frame is arranged in the filter bin facing the smoke passing direction, and the mounting shaft is rotatably mounted on the first frame; and The first elastic member is elastically connected between the first frame and the filter screen along a smoke passing direction.

5. The waste heat recovery device according to claim 4, characterized in that: The first frame cross section is configured as a U-shaped structure with an opening toward the filter screen, and the filter portion further comprises: a second frame, facing the smoke passing direction and embedded in the open end of the U-shaped structure, and spaced apart from the closed end of the U-shaped structure, the first elastic member being connected between the first frame and the second frame, and the filter being mounted on the second frame; and The pressing sheet has one end rotatably mounted on the second frame and the other end forming a free end for pressing on or off the filter screen.

6. The waste heat recovery device according to claim 4, characterized in that: An opening is formed on the side wall of the filter bin for the first frame to pass through, and the filter portion further includes a limit block disposed on the filter bin near the opening, and the limit block is configured to be able to extend and retract in a direction close to or away from the opening.

7. The waste heat recovery device according to claim 1, characterized in that: The heat exchange part includes: a heat exchange tube, which is configured as a coil and is disposed in communication between the filter bin and the spoiler for circulating the flue gas; and The heat exchange tank is used to contain a heat exchange medium, and the heat exchange pipe runs through the heat exchange tank to contact and exchange heat with the heat exchange medium.

8. The waste heat recovery device according to claim 1, characterized in that: The spoiler includes: A flow-turbulating chamber, connected and arranged downstream of the heat exchange part; and A plurality of spoilers are accommodated in the spoiler compartment, and two adjacent spoilers are arranged in a staggered manner.

9. The waste heat recovery device according to claim 8, characterized in that: The spoiler also includes an activated carbon adsorption net accommodated in the spoiler chamber, and the activated carbon adsorption net is arranged at intervals upstream of the plurality of spoilers facing the smoke passing direction.

10. The waste heat recovery device according to claim 8 or 9, characterized in that: The spoiler also includes a dust absorbing pad attached to the spoiler.

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