Three-stage tandem type waste heat exchange device

Abstract

The invention discloses a three-stage tandem type waste heat exchange device, which belongs to the field of boiler heat exchange, comprises a sliding strip, and is characterized in that the front and back surfaces of the sliding strip are fixedly connected with support rods, the left side of the sliding strip is provided with a heat exchange assembly, the heat exchange assembly comprises a shell, and the upper and lower ends of the shell are respectively provided with a discharge port and a feed port; a heat exchange pipe is arranged on the inner surface of the shell, the two ends of the heat exchange pipe are fixedly connected with a water inlet and a water outlet correspondingly, the water inlet and the water outlet penetrate through the right side of the shell and are fixedly connected with the right side of the shell, and the number of the heat exchange assemblies is three. According to the oil burning boiler, heat exchange is conducted on flue gas of the oil burning boiler and the external medium through the heat exchange assemblies, the three heat exchange assemblies are arranged and connected in series, the medium can be allowed to sequentially pass through the three heat exchange assemblies or each heat exchange assembly is allowed to independently conduct heat exchange of the medium, and the effect of facilitating efficient heat exchange is achieved; the device can be used according to different requirements.

Description

Technical Field

[0001] This application relates to the field of boiler heat exchange, and more specifically, to a three-stage series waste heat exchange device. Background Technology

[0002] An oil-fired boiler is a boiler that uses oil as fuel, including diesel, waste oil, and other oil-based fuels. Oil-fired boilers include oil-fired hot water boilers, oil-fired heating boilers, oil-fired bath boilers, and oil-fired steam boilers. They use light oil (such as diesel or kerosene), heavy oil, residual oil, or crude oil as fuel. Compared to gas-fired and electric boilers, oil-fired boilers are more economical to operate than electric boilers and more convenient to use than gas-fired boilers. Heat exchange devices are commonly used in the operation of oil-fired boilers, and shell-and-tube heat exchangers are widely used in boiler systems, primarily for key heat exchange processes such as boiler feedwater heating, steam condensation, and cooling water circulation.

[0003] In existing heat exchangers, the medium is usually directly introduced into a single heat exchanger during heat exchange, resulting in weak heat exchange effect and making it inconvenient to add more media to be exchanged according to needs, thus hindering more efficient heat exchange. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a three-stage series waste heat exchange device, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this application provides a three-stage series waste heat exchange device, including a sliding bar. The sliding bar is characterized by having support rods fixedly connected to both its front and back sides. A heat exchange assembly is disposed on the left side of the sliding bar. The heat exchange assembly includes a housing, with an outlet and an inlet at its upper and lower ends respectively. A heat exchange tube is disposed on the inner surface of the housing, with an inlet and an outlet fixedly connected to both ends of the heat exchange tube. The inlet and outlet penetrate and are fixedly connected to the right side of the housing. The number of heat exchange assemblies is three sets. The sliding bar and the support rods... The support rod is fixedly connected to the right side of the outer shell of the heat exchange assembly located in the middle. There are six heat exchange tubes, water inlets and water outlets, which are arranged in pairs in each group of heat exchange assemblies. A pipe assembly is arranged on the right side of the heat exchange assembly. A sliding assembly is arranged on the inner surface of the pipe assembly. A pushing assembly is arranged behind the sliding assembly. A driving assembly is arranged on the left side of the sliding assembly. A cleaning assembly for cleaning the water inlet and water outlet is assembled on the outer surface of the heat exchange assembly. A filter assembly for filtering boiler flue gas is arranged at the bottom of the heat exchange assembly.

[0006] Preferably, the pipeline assembly includes a first solenoid valve, with a first connecting pipe fixedly connected to both the upper and lower ends of the first solenoid valve, a second solenoid valve fixedly connected to the right side of the first connecting pipe, a first pipe joint fixedly connected to the right side of the second solenoid valve, a first rotary joint fixedly connected to the left end of the first connecting pipe, and a first threaded joint fixedly connected to the left end of the first rotary joint, the first threaded joint being adapted to the inlet and the outlet.

[0007] Preferably, the pipe assembly further includes a second threaded connector, which is adapted to the inlet and the outlet. A second rotary connector is fixedly connected to the right end of the second threaded connector, a second connecting pipe is fixedly connected to the right end of the second rotary connector, and a second pipe connector is fixedly connected to the right end of the second connecting pipe. A first gear is fixedly connected to the outer surface of both the first and second threaded connectors, and the first gears on two adjacent first and second threaded connectors mesh with each other.

[0008] Preferably, the sliding assembly includes a slider, which is slidably connected to the outer surface of the sliding bar. Support plates are fixedly connected to both the upper and lower surfaces of the slider. A support seat is fixedly connected to the left side of the support plate. The support seat is rotatably connected to the outer surfaces of the first threaded joint and the second threaded joint. A protrusion plate is fixedly connected to the back of the slider.

[0009] Preferably, the pushing component includes a support block, which is fixedly connected to the back of the outer shell of the heat exchange component located in the middle. An electric push rod is fixedly connected to the right side of the support block, and a pushing seat is fixedly connected to the right end of the electric push rod. A limiting strip is fixedly connected to the back of the pushing seat, and the limiting strip passes through and is slidably connected to the right side of the support block.

[0010] Preferably, the drive assembly includes a shaft support, which is fixedly connected to the left side of the support plate. A rotating shaft is rotatably connected through the top of the shaft support. There are two rotating shafts. The outer surface of the rotating shaft is provided with a worm thread. A worm wheel meshes with the outer surface of the worm thread. The worm wheel is fixedly connected to the outer surfaces of the first threaded joint and the second threaded joint. A second gear is fixedly connected to the outer surface of the rotating shaft.

[0011] Preferably, the drive assembly further includes a mounting base, which is fixedly connected to the left side of the support plate. A motor is fixedly connected to the left side of the mounting base, and a drive shaft is fixedly connected to the output end of the motor via a coupling. A third gear is fixedly connected to the lower end of the drive shaft, and the third gear meshes with the second gear.

[0012] Preferably, the cleaning component includes a connecting pipe, a connecting rod fixedly connected between the connecting pipe and the outer shell, air nozzles fixedly connected to both ends of the connecting pipe, an air chamber fixedly connected to the back of the support block, and three air chambers, with each pair of adjacent air chambers fixedly connected to each other. The air chambers are connected to the connecting pipe via pipelines, a piston rod is slidably connected to the inner surface of the air chamber, a connecting plate is fixedly connected to the right end of the piston rod, and the connecting plate is fixedly connected to the back of the limiting strip.

[0013] Preferably, the filter assembly includes a filter chamber, a connecting flange fixedly connected to the top of the filter chamber, a flue gas inlet provided at the bottom of the filter chamber, a collection box slidably connected to the bottom of the inner surface of the filter chamber, the collection box penetrating and slidably connected to the left side of the filter chamber, a filter screen fixedly connected to the inner surface of the filter chamber, a scraper slidably connected to the bottom of the filter chamber, slide rails slidably connected to both ends of the scraper, the slide rails being fixedly connected to the inner surface of the filter chamber, a second hydraulic chamber penetrating and fixedly connected to the top of the filter chamber, a second hydraulic rod slidably connected to the inner surface of the second hydraulic chamber, the second hydraulic rod being fixedly connected to the right side of the scraper, a first hydraulic chamber fixedly connected to the bottom of the slide bar, a pipeline connecting the first hydraulic chamber and the second hydraulic chamber, a first hydraulic rod slidably connected to the inner surface of the first hydraulic chamber, and the first hydraulic rod being fixedly connected to the right side of the slider.

[0014] The advantages of this application are: (1) This application uses heat exchange components to exchange heat between the flue gas and external medium of the oil-fired boiler. There are three sets of heat exchange components connected in series, which allows the medium to pass through the three sets of heat exchange components in sequence or allows each set of heat exchange components to exchange heat on its own. This facilitates efficient heat exchange and can be used according to different needs.

[0015] (2) This application sets up a cleaning component to blow air at the docking position to remove dust and impurities before the pipe assembly and heat exchange assembly are connected, thereby preventing dust and impurities from affecting the tightness of the connection and making it easier to ensure the accuracy of the connection.

[0016] (3) This application filters the boiler flue gas entering the heat exchange component by setting a filter component. The connection between the pipe component and the heat exchange component will also drive the filter component to self-clean, which helps to ensure the smooth flow of the filter component. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the left part of the structure of the present invention; Figure 4 This is a cross-sectional view of the left part of the structure of the present invention; Figure 5 This is a rear view of the left part of the structure of the present invention; Figure 6 This is a schematic diagram of the right part of the structure of the present invention; Figure 7 This is a rear view of the right part of the structure of the present invention; Figure 8 This is a schematic diagram of the lower part of the structure of the present invention; Figure 9 This is a cross-sectional view of the lower part of the structure of the present invention; Figure 10 This is the invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 11 This is the invention Figure 3 Enlarged schematic diagram of the structure at point B; Figure 12 This is the invention Figure 5 Enlarged schematic diagram of the structure at point C; Figure 13 This is the invention Figure 7 Enlarged schematic diagram of the structure at point D.

[0018] In the above image: 1. Sliding bar; 2. Support rod; 3. Heat exchange assembly; 301. Housing; 302. Discharge port; 303. Inlet; 304. Heat exchange tube; 305. Water inlet; 306. Water outlet; 4. Piping assembly; 401. First solenoid valve; 402. First connecting pipe; 403. Second solenoid valve; 404. First pipe joint; 405. First rotary joint; 406. First threaded joint; 407. Second threaded joint; 408. Second rotary joint; 409. Second connecting pipe; 410. Second pipe joint; 411. First gear; 5. Sliding assembly; 501. Slider; 502. Support plate; 503. Support base; 504. Protruding plate; 6. Drive assembly; 601. Shaft support; 602. Rotating shaft 603. Worm thread; 604. Worm wheel; 605. Second gear; 606. Mounting base; 607. Motor; 608. Third gear; 7. Cleaning assembly; 701. Connecting pipe; 702. Connecting rod; 703. Air nozzle; 704. Air chamber; 705. Piston rod; 706. Connecting plate; 8. Filter assembly; 801. Filter chamber; 802. Connecting flange; 803. Flue gas inlet; 804. Collection box; 805. Filter screen; 806. Scraper; 807. Slide rail; 808. Second hydraulic chamber; 809. Second hydraulic rod; 810. First hydraulic chamber; 811. First hydraulic rod; 9. Push assembly; 901. Support block; 902. Electric push rod; 903. Pushing seat; 904. Limiting strip. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1, see Figures 1-13This embodiment provides a three-stage series waste heat exchange device, including a sliding bar 1. A trapezoidal track is provided at the top of the sliding bar 1. The device is characterized by two L-shaped support rods 2 fixedly connected to both sides of the sliding bar 1. A heat exchange assembly 3 is provided on the left side of the sliding bar 1. The heat exchange assembly 3 includes a housing 301. A discharge port 302 and a feed port 303 are respectively provided at the upper and lower ends of the housing 301. Both the discharge port 302 and the feed port 303 are provided with flanges. A heat exchange tube 304 is provided on the inner surface of the housing 301. The heat exchange tube 304 is spiral-shaped, and a water inlet 305 and a water outlet 306 are fixedly connected to both ends of the heat exchange tube 304. 5 is positioned above the outlet 306. The inlet 305 and outlet 306 penetrate and are fixedly connected to the right side of the outer shell 301. The outer surface of the right end of the inlet 305 and outlet 306 is threaded, with the threads at each pair of adjacent inlets 305 and outlets 306 rotating in opposite directions. There are three sets of heat exchange components 3, which are arranged vertically in series. The outlet 302 and inlet 303 of each pair of adjacent heat exchange components 3 are connected to each other by flanges. The sliding strip 1 and support rod 2 are fixedly connected to the right side of the outer shell 301 in the middle heat exchange component 3. There are six heat exchange tubes 304, inlets 305, and outlets 306, which are arranged in pairs in each heat exchange component 3. The right side of the heat exchange component 3... A pipeline assembly 4 is provided, including a first solenoid valve 401. The first solenoid valve 401 and its connected auxiliary components are positioned between every two adjacent heat exchange components 3, allowing the medium to pass through the three heat exchange components 3 sequentially. The first solenoid valve 401 is fixedly connected to its upper and lower ends by first connecting pipes 402. Opening the first solenoid valve 401 connects the first connecting pipes 402 at its upper and lower ends, allowing the medium to pass through the three heat exchange components 3 sequentially. The first connecting pipes 402 are L-shaped. A second solenoid valve 403 is fixedly connected to the right side of the first connecting pipe 402. A first pipe connector 404 is fixedly connected to the right side of the second solenoid valve 403, and the first pipe connector 404 is used to connect the pipeline to an external water inlet or outlet. The first connecting pipe 402 is used for individual use by each heat exchange component 3. A first rotary joint 405 is fixedly connected to the left end of the first connecting pipe 402. A first threaded joint 406 is fixedly connected to the left end of the first rotary joint 405. The first threaded joint 406 is adapted to the inlet 305 and outlet 306. The pipe assembly 4 also includes a second threaded joint 407, which is adapted to the inlet 305 and outlet 306. Both the first threaded joint 406 and the second threaded joint 407 have internal threads for tightening onto the threads on the outer surfaces of the inlet 305 and outlet 306. A second rotary joint 408 is fixedly connected to the right end of the second threaded joint 407. Specifically, the first rotary joint 405 and the second rotary joint 408 are a central rotary joint.The system ensures that the pipeline remains connected and leak-free when the first threaded joint 406 and the second threaded joint 407 rotate. A second connecting pipe 409 is fixedly connected to the right end of the second rotary joint 408, and a second pipe joint 410 is fixedly connected to the right end of the second connecting pipe 409. There are two sets of the second threaded joint 407, second rotary joint 408, second connecting pipe 409, and second pipe joint 410, with two sets in each set. These two sets of second threaded joints 407, second rotary joints 408, second connecting pipes 409, and second pipe joints 410 are respectively located at the inlet 305 of the uppermost heat exchange component 3 and the outlet 306 of the lowermost heat exchange component 3, allowing the medium to pass sequentially through the three sets of heat exchange components. The water inlet and outlet of the heat exchange component 3, and the water inlet of the uppermost heat exchange component 3 and the water outlet of the lowermost heat exchange component 3 when each heat exchange component 3 is used alone, are provided with first gears 411 fixedly connected to the outer surfaces of the first threaded joint 406 and the second threaded joint 407. The first gears 411 on two adjacent first threaded joints 406 and the second threaded joint 407 mesh with each other. The inner surface of the pipe assembly 4 is provided with a sliding assembly 5, which includes a slider 501. The slider 501 is slidably connected to the outer surface of the sliding strip 1. Support plates 502 are fixedly connected to both the upper and lower surfaces of the slider 501. The support plates 502 are T-shaped and there are two support plates 502. A support plate 502 is fixedly connected to the left side of the support plate 502. Support base 503, L-shaped, six in number, mirror-image and staggered. Support base 503 is rotatably connected to the outer surface of the first threaded joint 406 and the second threaded joint 407. Bearing is provided between the support base 503 and the outer surface of the first threaded joint 406 and the second threaded joint 407. A protruding plate 504 is fixedly connected to the back of the slider 501. A pushing assembly 9 is provided behind the sliding assembly 5. The pushing assembly 9 includes a support block 901, which is fixedly connected to the back of the outer shell 301 in the heat exchange assembly 3 located in the middle. An electric push rod 902 is fixedly connected to the right side of the support block 901. A pushing seat 903 is fixedly connected to the right end of the electric push rod 902. The sliding assembly 5 has a U-shaped component. A limiting strip 904 is fixedly connected to the back of the push base 903. The limiting strip 904 passes through and is slidably connected to the right side of the support block 901. A drive assembly 6 is provided on the left side of the sliding assembly 5. The drive assembly 6 includes a shaft support 601, which is T-shaped. The shaft support 601 is fixedly connected to the left side of the support plate 502. A rotating shaft 602 passes through and is rotatably connected to the top of the shaft support 601. A bearing is provided between the rotating shaft 602 and the shaft support 601. There are two rotating shafts 602. A worm thread 603 is provided on the outer surface of the rotating shaft 602. A worm wheel 604 meshes with the outer surface of the worm thread 603. The worm wheel 604 is fixedly connected to the outer surface of the first threaded joint 406 and the second threaded joint 407.A worm gear 604 is provided on the lower of every two adjacent first threaded joints 406 or second threaded joints 407. A second gear 605 is fixedly connected to the outer surface of the rotating shaft 602. The drive assembly 6 also includes a mounting base 606, which is fixedly connected to the left side of the support plate 502. A motor 607 is fixedly connected to the left side of the mounting base 606. The output end of the motor 607 is fixedly connected to a drive shaft via a coupling, and a third gear 608 is fixedly connected to the lower end of the drive shaft. The third gear 608 meshes with the second gear 605 and is positioned between the second gears 605 on the two rotating shafts 602. A cleaning assembly 7 for cleaning the inlet 305 and outlet 306 is mounted on the outer surface of the heat exchange assembly 3. A filter assembly 8 for filtering boiler flue gas is provided at the bottom of the heat exchange assembly 3.

[0026] In practical use, the above-mentioned equipment first introduces boiler flue gas through the inlet 303 of the bottommost housing 301. The boiler flue gas then enters the next housing 301 through the outlet 302 and is finally discharged from the outlet 302 of the topmost housing 301. By activating the electric push rod 902 to retract it, the push seat 903 is moved to the left. The push seat 903 drives the convex plate 504, causing the slider 501 to slide to the left on the sliding bar 1. This, in turn, drives the support plate 502 and the support seat 503, bringing the first threaded connector 406 and the second threaded connector 407 closer to and fitting against all the inlets 305 and outlets 306 on the housings 301. At this time, the motor 607 is activated, which drives the third gear 6. Rotation 08 causes the second gear 605 to rotate, which in turn rotates the rotating shaft 602. The rotation of the rotating shaft 602 drives the worm thread 603, causing the worm wheel 604 to rotate. The worm wheel 604 then drives the first threaded connector 406 and the second threaded connector 407 to rotate, which in turn drives the first gear 411, causing the adjacent first threaded connector 406 and second threaded connector 407 to rotate simultaneously. The rotation of the first threaded connector 406 and the second threaded connector 407 connects the inlet 305 and the outlet 306. At this time, opening the first solenoid valve 401 and closing the second solenoid valve 403 connects the first connecting pipes 402 at both ends of the first solenoid valve 401, and the connection is established through the uppermost second pipe connector. 410 connects to a pipe to introduce water or other media from an external heat exchanger through a second connecting pipe 409, a second rotary joint 408, a second threaded joint 407, and an inlet 305 into the heat exchange tube 304 inside the uppermost outer casing 301, thereby exchanging heat with the boiler flue gas. Water flows out through the outlet 306 of the heat exchange tube 304, then passes through the first threaded joint 406, the first rotary joint 405, the first pipe joint 404, the first connecting pipe 402, and the first solenoid valve 401 into the next heat exchange tube 304 inside the outer casing 301, and then repeats this process to enter the heat exchange tube 304 inside the lowermost outer casing 301, finally exiting through the second pipe joint 410 at the lowermost outer casing 301. The water flows out and passes through the heat exchange tubes 304 in the three shells 301 in sequence for heat exchange to improve heat exchange efficiency. When it is necessary to use the heat exchange tubes 304 in the three shells 301 individually, the first solenoid valve 401 is closed and the second solenoid valve 403 is opened to cut off the connection between the first connecting pipes 402 at the upper and lower ends of the first solenoid valve 401. At this time, the four sets of first pipe joints 404 are connected to the external water outlet and water inlet respectively, so that the heat exchange tube 304 in the middle shell 301 can carry water in and out, and the heat exchange tubes 304 in the upper and lower shells 301 can carry water in and out, so that the heat exchange tubes 304 in the three shells 301 can carry water in and out individually.

[0027] Example 2, see Figures 1-13The cleaning component 7 includes three connecting pipes 701, which are respectively installed on the three heat exchange components 3. The connecting pipes 701 are U-shaped, with their two ends aligned with the inlet 305 and outlet 306 of each heat exchange component 3. A connecting rod 702 is fixedly connected between the connecting pipe 701 and the outer shell 301. A jet nozzle 703 is fixedly connected to both ends of the connecting pipe 701. Three air chambers 704 are fixedly connected to the back of the support block 901. Every two adjacent air chambers 704 are fixedly connected to each other. The air chambers 704 are connected to the connecting pipes 701 by pipelines. Each air chamber 704 is connected to each connecting pipe 701 by a hose. A piston rod 705 is slidably connected to the inner surface of the air chamber 704. A connecting plate 706 is fixedly connected to the right end of the piston rod 705. The connecting plate 706 is T-shaped and is fixedly connected to the back of the limiting strip 904.

[0028] In practical use, when the electric push rod 902 pulls the push seat 903 to the left, it also causes the limiting strip 904 to slide to the left within the support block 901. The limiting strip 904 causes the connecting plate 706 to move to the left, which in turn causes the piston rod 705 to slide to the left within the air chamber 704. The piston rod 705 sliding to the left within the air chamber 704 pushes the gas within the air chamber 704, causing it to be injected into the connecting pipe 701 through the hose, and then sprayed out from the jet nozzle 703, thereby blowing air towards the water inlet 305 and the water outlet 306 to blow away dust and impurities on the threads at the water inlet 305 and the water outlet 306, so as to ensure the accuracy of the threaded connection.

[0029] Example 3, see Figures 1-13The filter assembly 8 includes a filter chamber 801. A connecting flange 802 is fixedly connected to the top of the filter chamber 801. The connecting flange 802 is adapted to and connected to the flange of the feed inlet 303. A flue gas inlet 803 is provided at the bottom of the filter chamber 801. A collection box 804 is slidably connected to the bottom of the inner surface of the filter chamber 801. A handle is provided on the collection box 804. The collection box 804 and the filter chamber 801 have a drawer-type structure. The collection box 804 and the filter chamber 801 are slidably connected through the left side. A filter screen 805 is fixedly connected to the inner surface of the filter chamber 801. The filter screen 805 is inclined and is located above the collection box 804. A scraper 806 is slidably connected to the bottom of the filter chamber 801. The scraper 806 has two front and two rear sides. Each end is slidably connected to a slide rail 807, which is fixedly connected to the inner surface of the filter chamber 801. A second hydraulic chamber 808 is fixedly connected through the top of the filter chamber 801. Hydraulic oil is provided in the second hydraulic chamber 808. A second hydraulic rod 809 is slidably connected to the inner surface of the second hydraulic chamber 808. The second hydraulic rod 809 is fixedly connected to the right side of the scraper 806. A first hydraulic chamber 810 is fixedly connected to the bottom of the sliding bar 1. The first hydraulic chamber 810 and the second hydraulic chamber 808 are connected by pipelines. The first hydraulic chamber 810 and the second hydraulic chamber 808 are connected and communicated through a hose. A first hydraulic rod 811 is slidably connected to the inner surface of the first hydraulic chamber 810. The first hydraulic rod 811 is fixedly connected to the right side of the slider 501.

[0030] In practical use, before the boiler flue gas enters the feed inlet 303 of the lowermost outer shell 301, it first enters the filter chamber 801 through the flue gas inlet 803. At this time, the filter screen 805 in the filter chamber 801 filters the dust and impurities in the flue gas to prevent them from adhering to the heat exchange tube 304 inside the outer shell 301 and affecting the heat exchange efficiency. At this time, the slider 501 slides to the left on the sliding bar 1, which will also pull the first hydraulic rod 811 to slide to the left in the first hydraulic chamber 810. The first hydraulic rod 811 will draw hydraulic oil from the second hydraulic chamber 808 through the hose, causing the second hydraulic rod 809 to retract into the second hydraulic chamber 808. At this time, the second hydraulic rod 809 will pull the scraper 806 to slide to the right on the slide rail 807. The scraper 806 will scrape the dust and impurities on the filter chamber 801, causing the impurities to fall into the collection box 804 for collection, so as to ensure that the filter screen 805 is unobstructed.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A three-stage series type waste heat exchanger device comprising a sliding strip (1), characterized in that, The sliding bar (1) is fixedly connected with support rods (2) on both sides, and the left side of the sliding bar (1) is provided with a heat exchange assembly (3); The heat exchange assembly (3) comprises an outer shell (301), the upper and lower ends of the outer shell (301) are respectively provided with discharge ports (302) and feed ports (303), the inner surface of the outer shell (301) is provided with heat exchange pipes (304), the two ends of the heat exchange pipes (304) are respectively fixedly connected with water inlets (305) and water outlets (306), the water inlets (305) and the water outlets (306) are fixedly connected with the right side of the outer shell (301), the number of the heat exchange assemblies (3) is three, the sliding bar (1) and the support rod (2) are fixedly connected with the right side of the outer shell (301) of the middle heat exchange assembly (3), the number of the heat exchange pipes (304), the water inlets (305) and the water outlets (306) is six, and each two of them are arranged in each heat exchange assembly (3). The right side of the heat exchange assembly (3) is provided with a pipeline assembly (4), the inner surface of the pipeline assembly (4) is provided with a sliding assembly (5), the rear of the sliding assembly (5) is provided with a pushing assembly (9), the left side of the sliding assembly (5) is provided with a driving assembly (6), the outer surface of the heat exchange assembly (3) is provided with a cleaning assembly (7) for cleaning the water inlets (305) and the water outlets (306), and the bottom of the heat exchange assembly (3) is provided with a filtering assembly (8) for filtering boiler flue gas.

2. The three-stage, series flow, waste heat recovery heat exchanger of claim 1, wherein, The pipeline assembly (4) comprises a first electromagnetic valve (401), the upper and lower ends of the first electromagnetic valve (401) are fixedly connected with first connecting pipes (402), the right side of the first connecting pipe (402) is fixedly connected with a second electromagnetic valve (403), the right side of the second electromagnetic valve (403) is fixedly connected with a first pipeline joint (404), the left end of the first connecting pipe (402) is fixedly connected with a first rotary joint (405), the left end of the first rotary joint (405) is fixedly connected with a first threaded joint (406), and the first threaded joint (406) is matched with the water inlets (305) and the water outlets (306).

3. A three-stage, series flow, waste heat recovery heat exchanger according to claim 2, wherein, The pipeline assembly (4) further comprises a second threaded joint (407), the second threaded joint (407) is matched with the water inlets (305) and the water outlets (306), the right end of the second threaded joint (407) is fixedly connected with a second rotary joint (408), the right end of the second rotary joint (408) is fixedly connected with a second connecting pipe (409), the right end of the second connecting pipe (409) is fixedly connected with a second pipeline joint (410), the outer surfaces of the first threaded joint (406) and the second threaded joint (407) are fixedly connected with first gears (411), and the first gears (411) on two adjacent first threaded joints (406) and second threaded joints (407) are meshed with each other.

4. A three-stage, series flow, waste heat recovery heat exchanger according to claim 3, wherein, The sliding assembly (5) comprises a sliding block (501), the sliding block (501) is slidably connected with the outer surface of the sliding bar (1), both upper and lower surfaces of the sliding block (501) are fixedly connected with support plates (502), the left side of the support plate (502) is fixedly connected with a support seat (503), the support seat (503) is rotatably connected with the outer surfaces of the first threaded joint (406) and the second threaded joint (407), and the back of the sliding block (501) is fixedly connected with a convex plate (504).

5. The three-stage, series flow, waste heat recovery heat exchanger of claim 1, wherein, The pushing assembly (9) comprises a support block (901), the support block (901) is fixedly connected with the back of the shell (301) in the heat exchange assembly (3) in the middle, the right side of the support block (901) is fixedly connected with an electric push rod (902), the right end of the electric push rod (902) is fixedly connected with a pushing seat (903), the back of the pushing seat (903) is fixedly connected with a limiting strip (904), and the limiting strip (904) penetrates through and is slidably connected with the right side of the support block (901).

6. A three-stage, series flow, waste heat recovery heat exchanger according to claim 4, wherein, The driving assembly (6) comprises a shaft support (601), the shaft support (601) is fixedly connected with the left side of the support plate (502), the top of the shaft support (601) penetrates and is rotatably connected with rotating shafts (602), the number of the rotating shafts (602) is two, the outer surface of the rotating shaft (602) is provided with worm threads (603), the outer surface of the worm thread (603) is engaged with a worm wheel (604), the worm wheel (604) is fixedly connected with the outer surfaces of the first threaded joint (406) and the second threaded joint (407), and the outer surface of the rotating shaft (602) is fixedly connected with a second gear (605).

7. A three-stage, series flow, waste heat recovery heat exchanger according to claim 6, wherein, The driving assembly (6) further comprises a mounting seat (606), the mounting seat (606) is fixedly connected with the left side of the support plate (502), the left side of the mounting seat (606) is fixedly connected with a motor (607), the output end of the motor (607) is fixedly connected with a driving shaft through a shaft coupling, the lower end of the driving shaft is fixedly connected with a third gear (608), and the third gear (608) is engaged with the second gear (605).

8. A three-stage, series flow, waste heat recovery heat exchanger according to claim 5, wherein, The cleaning assembly (7) comprises a communication pipe (701), a connecting rod (702) is fixedly connected between the communication pipe (701) and the shell (301), the two ends of the communication pipe (701) are fixedly connected with air injection nozzles (703), the back of the support block (901) is fixedly connected with air warehouses (704), the number of the air warehouses (704) is three, every two adjacent air warehouses (704) are fixedly connected with each other, the air warehouses (704) are connected in line between the communication pipe (701), the inner surface of the air warehouse (704) is slidably connected with a piston rod (705), the right end of the piston rod (705) is fixedly connected with a connecting plate (706), and the connecting plate (706) is fixedly connected with the back of the limiting strip (904).

9. A three-stage, series flow, waste heat recovery heat exchanger according to claim 4, wherein, The filter assembly (8) includes filter bin (801), the top fixedly connected with connecting flange (802), the bottom of filter bin (801) is provided with flue gas inlet (803), the inside surface bottom of filter bin (801) is slidably connected with collection box (804), the collection box (804) is slidably connected with the left side of filter bin (801), the inside surface of filter bin (801) is fixedly connected with filter screen (805), the bottom of filter bin (801) is slidably connected with scraping strip (806), the front and rear ends of scraping strip (806) are slidably connected with slide rail (807), the slide rail (807) is fixedly connected with the inside surface of filter bin (801), the top of filter bin (801) is fixedly connected with second hydraulic bin (808), the inside surface of second hydraulic bin (808) is slidably connected with second hydraulic rod (809), the second hydraulic rod (809) is fixedly connected with the right side of scraping strip (806), the bottom of sliding strip (1) is fixedly connected with first hydraulic bin (810), the first hydraulic bin (810) is connected with the second hydraulic bin (808) between pipeline, the inside surface of first hydraulic bin (810) is slidably connected with first hydraulic rod (811), the first hydraulic rod (811) is fixedly connected with the right side of sliding block (501).

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