Waste heat collecting device for coal boiler flue gas treatment

Abstract

The utility model discloses a waste heat collecting device for coal boiler flue gas treatment, which comprises waste heat collecting equipment, a plurality of groups of heat exchange plates are arranged in the waste heat collecting equipment, the plurality of groups of heat exchange plates are separated and fixed through fixing frames, heat exchange tubes are arranged on the plurality of groups of heat exchange plates, and the heat exchange tubes are connected with the waste heat collecting equipment. A smoke suction opening and a smoke exhaust opening are formed in the front end of the waste heat collecting device. The mounting seats capable of sliding up and down are mounted at the rear ends of the heat exchange plates, and the detachable scraping plates are mounted on the mounting seats, so that the mounting seats can be pulled up and down to drive the scraping plates to scrape water drops on the surfaces of the adjacent heat exchange plates, and floating ash on the surfaces of the heat exchange plates is cleaned; therefore, the water drops on the surface of the heat exchange plate can be effectively prevented from corroding the surface of the heat exchange plate, the problem that the water drops on the surface of the heat exchange plate form a water film and hinder heat transfer between flue gas and a heat exchange medium can be effectively avoided, and the heat exchange efficiency of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal boiler flue gas treatment, in particular to a waste heat collection device for coal boiler flue gas treatment. Background Art

[0002] Coal-fired boilers, as one of the main equipment for converting the chemical energy of fuel into thermal energy, are widely used in high-energy-consuming industries such as electricity, metallurgy and petrochemicals. After the coal burns and releases heat in the furnace, the flue gas temperature is still relatively high after heat exchange through the tail convection heating surface. The flue gas discharged from various boilers often takes away 20-50% of the heat supplied by the furnace. In order to make full use of the flue gas heat and improve the thermal efficiency of the boiler, it can be recycled through a recovery device. The existing waste heat collection device for coal boiler flue gas treatment can basically meet daily use needs, but there are still some shortcomings that need to be improved.

[0003] Most of the waste heat collection devices for coal boiler flue gas treatment widely used on the market are equipped with multiple sets of heat exchange plates inside, so that they can fully absorb the heat contained in the coal boiler flue gas. However, in actual use, after the flue gas comes into contact with the heat exchange tube, water droplets will form on its surface due to hot and cold phenomena. The water droplets often contain certain acidic substances. Over time, they are easy to corrode the heat absorption plate, causing the wall thickness of the heat exchange tube, pipe connection parts and other metal parts to gradually become thinner. In addition, the water droplets adhere to the surface of the heat exchange tube to form a layer of water film. This layer of water film will increase thermal resistance and hinder the heat transfer between the flue gas and the heat exchange medium, thereby reducing the heat exchange efficiency. For this reason, we propose a waste heat collection device for coal boiler flue gas treatment to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a waste heat collection device for treating flue gas from a coal boiler, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat collection device for treating coal boiler flue gas, comprising a waste heat collection device, wherein a plurality of groups of heat exchange plates are arranged in the waste heat collection device, and the plurality of groups of heat exchange plates are separated and fixed by a fixing frame, and heat exchange tubes are installed on the plurality of groups of heat exchange plates, a smoke inlet and a smoke outlet are installed at the front end of the waste heat collection device, and the smoke inlet and the smoke outlet are both connected to the end parts of the plurality of groups of heat exchange tubes, guide rails are installed on both sides of the rear end of the waste heat collection device, guide sliders are installed in the guide rails, and a mounting seat is provided between the two groups of guide sliders, a rotating groove is opened on the guide slider, and a pull handle is connected to both sides of the mounting seat through a rotating rod, and the rotating rod is located inside the guide slider to form a rotating connection with the guide slider, a scraper is installed on the outside of the mounting seat by two groups of fixing screws, and the scraper can be rotatably entered between the plurality of groups of heat exchange plates, and a positioning component is provided inside the pull handle.

[0006] As a further preferred embodiment of the present technical solution, the positioning assembly includes a movable inner cavity provided with upper and lower ends of the handle, a positioning rod installed inside the movable inner cavity, an extension ring fixed at the middle of the positioning rod, and a cross bar fixed at the front end of the two groups of positioning rods. The outer walls of the two groups of positioning rods are wrapped with reset springs, and two groups of positioning grooves are provided on the guide slider. The left ends of the two groups of positioning rods can be inserted into the two groups of positioning grooves on the guide slider.

[0007] As a further preferred embodiment of the present technical solution, a side panel is installed at the front end of the waste heat collection device, and a detachable collection box is installed at the bottom end of the side panel.

[0008] As a further preferred embodiment of the present technical solution, a plurality of brush plates are installed on the scraper, and the surfaces of the brush plates are in full contact with the surfaces of the adjacent heat exchange plates.

[0009] As a further preferred embodiment of the present technical solution, a groove is provided at the left end of the outer wall of the cross bar, and the entire surface of the cross bar is ground.

[0010] As a further preferred embodiment of the present technical solution, the diameter of the positioning rods is the same as the inner diameter of the positioning slots on the guide slider, and the left ends of the two groups of positioning rods can be inserted into the two groups of positioning slots on the guide slider.

[0011] As a further preferred embodiment of the present technical solution, both ends of the return spring are respectively connected to the outer wall of the extension ring and the inner wall of the movable inner cavity, and the extension ring is elastically connected to the inner wall of the movable inner cavity through the return spring.

[0012] The utility model provides a waste heat collection device for treating flue gas from a coal boiler, which has the following advantages:

[0013] 1. The utility model installs a mounting seat that can slide up and down at the rear end of the heat exchange plate, and installs a detachable scraper on the mounting seat. The mounting seat can be pulled up and down, allowing the mounting seat to drive the scraper to scrape water droplets on the surface of the adjacent heat exchange plate and clean the floating dust on the surface of the heat exchange plate, thereby effectively preventing the water droplets on the surface of the heat exchange plate from corroding the surface of the heat exchange plate, and effectively avoiding the problem of water droplets on the surface of the heat exchange plate forming a water film that hinders the heat transfer between the flue gas and the heat exchange medium, thereby improving the heat exchange efficiency of the equipment.

[0014] 2. The utility model installs two sets of positioning rods that can move forward and backward on the handle at the side end of the mounting seat, so that the mounting seat can quickly drive the scraper to quickly enter or leave the interior of multiple sets of heat exchange plates, and then the two sets of return springs release the elastic force to push the two sets of extension rings to move to the left, so that the two sets of positioning rods are inserted into the positioning grooves at the corresponding positions, and the two sets of positioning rods form a stable steering limit effect on the mounting seat, so that when the heat exchange plate is in operation, the mounting seat can drive the scraper to leave the interior of the heat exchange plate, avoiding the scraper from interfering with the use of the heat exchange plate, and ensuring the normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a rear view structural diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the active state structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the utility model;

[0020] Figure 5 For the utility model Figure 4 A schematic diagram of the enlarged structure.

[0021] In the figure: 1. Waste heat collection device; 2. Heat exchange plate; 3. Fixing frame; 4. Heat exchange tube; 5. Smoke outlet; 6. Smoke exhaust outlet; 7. Guide rail; 8. Guide slider; 9. Mounting seat; 10. Rotating groove; 11. Rotating rod; 12. Scraper; 13. Fixing screw; 14. Pull handle; 15. Movable inner cavity; 16. Positioning rod; 17. Extension ring; 18. Cross bar; 19. Positioning groove; 20. Return spring; 21. Side plate; 22. Collection box. DETAILED DESCRIPTION

[0022] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0023] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0025] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0026] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0027] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of the waste heat collection device for treating flue gas from a coal boiler of the present invention in conjunction with the accompanying drawings.

[0028] like Figures 1 to 5As shown, in this embodiment, a waste heat collection device for treating coal boiler flue gas includes a waste heat collection device 1, wherein multiple groups of heat exchange plates 2 are arranged in the waste heat collection device 1, and the multiple groups of heat exchange plates 2 are separated and fixed by a fixing frame 3, and heat exchange tubes 4 are installed on the multiple groups of heat exchange plates 2, and a smoke inlet 5 and a smoke outlet 6 are installed at the front end of the waste heat collection device 1, and the smoke inlet 5 and the smoke outlet 6 are both connected to the end parts of the multiple groups of heat exchange tubes 4, and guide rails 7 are installed on both sides of the rear end of the waste heat collection device 1, and guide sliders 8 are installed in the guide rails 7. A mounting seat 9 is provided between the two groups of guide sliders 8, and a rotating groove 10 is opened on the guide slider 8. Both sides of the mounting seat 9 are connected to a pull handle 14 through a rotating rod 11, and the rotating rod 11 is located inside the guide slider 8 to form a rotating connection with the guide slider 8. A scraper 12 is installed on the outside of the mounting seat 9 through two groups of fixing screws 13. The scraper 12 can be rotated into between the multiple groups of heat exchange plates 2, and a positioning component is provided inside the pull handle 14.

[0029] By installing a mounting seat 9 that can slide up and down at the rear end of the heat exchange plate 2, and installing a detachable scraper 12 on the mounting seat 9, when it is necessary to clean the water droplets on the surface of the heat exchange plate 2, the handle 14 at the right end of the mounting seat 9 can be rotated to allow the mounting seat 9 to drive the scraper 12 to rotate between multiple groups of heat exchange plates 2, and then the mounting seat 9 can be pulled up and down to allow the mounting seat 9 to drive the scraper 12 to scrape off the water droplets on the surfaces of adjacent heat exchange plates 2 and clean the floating dust on the surface of the heat exchange plate 2, thereby effectively preventing the water droplets on the surface of the heat exchange plate 2 from corroding the surface of the heat exchange plate 2, and effectively avoiding the water droplets on the surface of the heat exchange plate 2 from forming a water film, hindering the heat transfer between the flue gas and the heat exchange medium, and reducing the heat exchange efficiency, thereby ensuring that the waste heat recovery and utilization device can fully play its due role.

[0030] In other embodiments, the positioning assembly includes a movable inner cavity 15 with upper and lower ends of the handle 14, a positioning rod 16 installed inside the movable inner cavity 15, an extension ring 17 fixed to the middle of the positioning rod 16, and a cross bar 18 fixed to the front end of the two groups of positioning rods 16. A groove is provided at the left end of the outer wall of the cross bar 18, and the entire surface of the cross bar 18 is polished. Through this design, the contact area and friction between the cross bar 18 and the user's hand can be increased, which can make it easier for the user to effectively pull the cross bar 18. The outer walls of the two groups of positioning rods 16 are both wrapped with a return spring 20, and the two ends of the return spring 20 are respectively connected to the extension ring 17 outer wall and the inner wall of the movable inner cavity 15, the extension ring 17 is elastically connected to the inner wall of the movable inner cavity 15 by the return spring 20, so that the two sets of return springs 20 wrapped around the outside of the positioning plug rod 16 can continuously apply a leftward elastic force to the extension ring 17, so that the positioning plug rod 16 can move quickly to the left under the drive of the extension ring 17, so that the left end of the positioning plug rod 16 can be quickly inserted into the two sets of positioning grooves 19 on the guide slider 8, and can prevent the positioning plug rod 16 from accidentally detaching from the positioning groove 19. The guide slider 8 is provided with two sets of positioning grooves 19, and the left ends of the two sets of positioning plug rods 16 can both be inserted into the two sets of positioning grooves 19 on the guide slider 8;

[0031] By installing two sets of positioning rods 16 that can move forward and backward on the handle 14 at the side end of the mounting seat 9, when the mounting seat 9 needs to be rotated, the cross bar 18 can be pulled to the right end, so that the cross bar 18 drives the two sets of positioning rods 16 to move to the right along the two sets of movable inner cavities 15 on the handle 14, and the extension rings 17 outside the two sets of positioning rods 16 can squeeze the two sets of return springs 20, so that the two sets of return springs 20 contract and store force. When the left ends of the two sets of positioning rods 16 completely leave the two sets of positioning grooves 19 on the guide slider 8, the two sets of positioning rods 16 can release the steering limit effect on the mounting seat 9, and then the handle 14 can be twisted to allow the rotating rod 11 to move to the right. Drive the mounting seat 9 to rotate 180 degrees along the rotating groove 10, so that the mounting seat 9 can quickly drive the scraper 12 to quickly enter or leave the interior of multiple groups of heat exchange plates 2, so that when the heat exchange plates 2 are in operation, the mounting seat 9 can drive the scraper 12 to leave the interior of the heat exchange plates 2, avoiding the scraper 12 from interfering with the use of the heat exchange plates 2, ensuring the normal use of the equipment, and then release the tension on the cross bar 18, allowing the two groups of return springs 20 to release the elastic force to push the two groups of extension rings 17 to move to the left, allowing the two groups of positioning rods 16 to be inserted into the positioning grooves 19 at the corresponding positions, and allowing the two groups of positioning rods 16 to form a stable steering limit effect on the mounting seat 9, thereby improving the stability of the device during use.

[0032] In other embodiments, a side plate 21 is installed at the front end of the waste heat collection device 1, and a detachable collection box 22 is installed at the bottom end of the side plate 21;

[0033] Through this design, the side plate 21 can effectively collect the condensed water scraped off by the scraper 12 to prevent water droplets from splashing.

[0034] In other embodiments, multiple sets of brush plates are installed on the scraper 12, and the surfaces of the brush plates are fully in contact with the surfaces of the adjacent heat exchange plates 2;

[0035] Through this design, when the mounting seat 9 drives the scraper 12 to rotate and enter between multiple groups of heat exchange plates 2, it ensures that the brush plate on the surface of the scraper 12 can effectively scrape off the floating dust and condensed water on the surface of the multiple groups of heat exchange plates 2.

[0036] In other embodiments, the diameter of the positioning rods 16 is the same as the inner diameter of the positioning slots 19 on the guide slider 8, and the left ends of the two sets of positioning rods 16 can be inserted into the two sets of positioning slots 19 on the guide slider 8;

[0037] Through this design, when the left ends of the two sets of positioning rods 16 are inserted into the two sets of positioning grooves 19 on the guide slider 8, the two sets of positioning rods 16 can be effectively prevented from shaking inside the positioning grooves 19, so that the two sets of positioning rods 16 can form a stable steering limiting effect on the mounting seat 9, thereby ensuring the stability of the mounting seat 9 during movement.

[0038] The electrical components mentioned in this article are all connected to an external main controller and industrial power supply, and the main controller can be a conventional known device for controlling a computer or the like.

[0039] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A waste heat collection device for treating flue gas from a coal boiler, comprising a waste heat collection device (1), wherein a plurality of groups of heat exchange plates (2) are arranged in the waste heat collection device (1), wherein the plurality of groups of heat exchange plates (2) are separated and fixed by a fixing frame (3), and heat exchange tubes (4) are installed on the plurality of groups of heat exchange plates (2), and a smoke inlet (5) and a smoke outlet (6) are installed at the front end of the waste heat collection device (1), wherein the smoke inlet (5) and the smoke outlet (6) are connected to the ends of the plurality of groups of heat exchange tubes (4), and wherein: Guide rails (7) are installed on both sides of the rear end of the waste heat collection device (1), and guide sliders (8) are installed in the guide rails (7). A mounting seat (9) is provided between the two groups of guide sliders (8), and a rotation groove (10) is provided on the guide sliders (8). Both sides of the mounting seat (9) are connected to a pull handle (14) through a rotating rod (11). The rotating rod (11) is located inside the guide slider (8) and forms a rotation connection with the guide slider (8). A scraper (12) is installed on the outside of the mounting seat (9) through two groups of fixing screws (13). The scraper (12) can be rotated into between multiple groups of heat exchange plates (2), and a positioning component is provided inside the pull handle (14).

2. The waste heat collection device for treating coal boiler flue gas according to claim 1, characterized in that: The positioning assembly includes a movable inner cavity (15) with upper and lower ends of a pull handle (14), a positioning rod (16) installed inside the movable inner cavity (15), an extension ring (17) fixed at the middle of the positioning rod (16) and a cross bar (18) fixed at the front end of the two groups of positioning rods (16), the outer walls of the two groups of positioning rods (16) are wound with a return spring (20), and two groups of positioning grooves (19) are provided on the guide slider (8), and the left ends of the two groups of positioning rods (16) can be inserted into the two groups of positioning grooves (19) on the guide slider (8).

3. The waste heat collection device for treating coal boiler flue gas according to claim 1, characterized in that: The front end of the waste heat collection device (1) is equipped with a side plate (21), and the bottom end of the side plate (21) is equipped with a detachable collection box (22).

4. The waste heat collection device for treating coal boiler flue gas according to claim 1, characterized in that: Multiple groups of brush plates are installed on the scraper (12), and the surfaces of the brush plates are fully fitted with the surfaces of the adjacent heat exchange plates (2).

5. The waste heat collection device for treating coal boiler flue gas according to claim 2, characterized in that: A groove is provided at the left end of the outer wall of the crossbar (18), and the entire surface of the crossbar (18) is ground.

6. The waste heat collection device for treating coal boiler flue gas according to claim 2, characterized in that: The diameter of the positioning rod (16) is the same as the inner diameter of the positioning groove (19) on the guide slider (8), and the left ends of the two groups of positioning rods (16) can be inserted into the two groups of positioning grooves (19) on the guide slider (8).

7. The waste heat collection device for treating coal boiler flue gas according to claim 2, characterized in that: The two ends of the return spring (20) are respectively connected to the outer wall of the extension ring (17) and the inner wall of the movable inner cavity (15), and the extension ring (17) is elastically connected to the inner wall of the movable inner cavity (15) through the return spring (20).

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