A boiler waste heat recovery device

Abstract

A boiler waste heat recovery device includes a heat exchange box, with a diversion box and a convergence box respectively installed at the front and rear ends of the heat exchange box; a heat exchange tube is located inside the heat exchange box, and several of the heat exchange tubes are installed between the diversion box and the convergence box; an air inlet pipe is installed on one side of the heat exchange box; an air outlet pipe is installed on one side of the heat exchange box; a cleaning component is installed inside the heat exchange box to clean the surface of the heat exchange tube; the technical solution of the present application uses the cleaning component to clean dust and the like on the surface of the heat exchange tube to avoid affecting the heat exchange efficiency; the wavy heat exchange tube improves the heat exchange efficiency and transfers the heat in the flue gas to the heat exchange tube as much as possible. At the same time, the design of the cleaning component can adapt to the wavy heat exchange tube and clean its surface.

Description

Technical Field

[0001] The present invention relates to a recovery device, in particular to a boiler waste heat recovery device. Background Art

[0002] Boiler waste heat recovery is an important means of improving energy efficiency and conserving fuel. Waste heat refers to energy that is not utilized in energy utilization equipment under certain economic and technical conditions—in other words, excess, discarded energy. This includes waste heat from high-temperature exhaust gases, cooling media, waste steam and wastewater, high-temperature products and slag, chemical reactions, combustible waste gases, liquids, and waste materials, and high-pressure fluid waste heat. In boiler systems, flue gas waste heat is the primary source of waste heat.

[0003] Nowadays, heat exchangers are often used to recycle waste heat from flue gas. By installing equipment such as flue gas heat exchangers, the heat energy in the flue gas is recovered and converted into useful energy. These devices transfer the heat from the high-temperature flue gas to a medium that needs to be heated (such as water or air), thereby improving the efficiency of thermal energy utilization. However, during use, dust and other particles carried in the flue gas are easily adsorbed on the surface of the heat exchange tubes, resulting in reduced heat transfer efficiency.

[0004] In response to the above problems, we provide a boiler waste heat recovery equipment. Summary of the Invention

[0005] The present invention aims to overcome the deficiencies in the prior art and provide a boiler waste heat recovery device.

[0006] The object of the present invention is achieved like this:

[0007] A boiler waste heat recovery device comprises a heat exchange box, wherein a diversion box and a converging box are respectively installed at the front and rear ends of the heat exchange box;

[0008] Heat exchange tubes are located inside the heat exchange box, and a plurality of the heat exchange tubes are installed between the diverter box and the converging box;

[0009] An air inlet pipe is installed on one side of the heat exchange box;

[0010] An air outlet pipe is installed on one side of the heat exchange box;

[0011] The cleaning component is installed inside the heat exchange box to clean the surface of the heat exchange tube.

[0012] Furthermore, a base is installed at the bottom of the heat exchange box.

[0013] Furthermore, the heat exchange tubes are installed at equal intervals along the length direction of the heat exchange box.

[0014] Furthermore, a plurality of diverter pipes are installed between the air inlet pipe and the heat exchange box. An access end is provided at the bottom of the diverter pipe, and the access end is communicated with the heat exchange box.

[0015] Furthermore, there are two groups of diverter pipes, which are symmetrically arranged on one side of the heat exchange box, with three pipes in each group, and the diverter pipes are connected through pipelines.

[0016] Furthermore, a connecting flange is installed on the front side of the diverter box.

[0017] Furthermore, the heat exchange tube includes a front end tube, a rear end tube, and a wave tube. The front end of the wave tube is connected to the front end tube, the front end tube is connected to the diversion box, the rear end of the wave tube is connected to the rear end tube, and the rear end tube is connected to the convergence box.

[0018] Furthermore, the wave tube is a plurality of U-shaped tubes connected end to end.

[0019] Furthermore, two heat exchange boxes are provided.

[0020] Furthermore, the converging box of the front heat exchange box and the diverter box of the rear heat exchange box are connected through a pipeline.

[0021] Furthermore, the air outlet pipe of the front heat exchange box and the air inlet pipe of the rear heat exchange box are connected through a pipeline.

[0022] Furthermore, the cleaning component includes a rotating motor, a gear, a rotating track, a matching track, a linear motor platform, a mounting frame, a cleaning motor, and a cleaning kit. A rotating motor is installed on one side of the heat exchange box, and the output shaft of the rotating motor extends to the inside of the heat exchange box and is installed with the gear. The heat exchange box is rotatably connected to the rotating track on the inner cavity side wall close to the motor, and the inner side of the rotating track is engaged with the gear for transmission. The heat exchange box is rotatably connected to the matching track on the inner cavity side wall away from the motor, and the linear motor platform is installed between the rotating track and the matching track. The mounting frame is installed on the slider of the linear motor platform, and the cleaning motor is installed on the inner side of the mounting frame. The output shaft of the cleaning motor extends to the bottom of the mounting frame, and a cleaning kit is provided. The outer surface of the heat exchange tube is cleaned by the cleaning kit.

[0023] Furthermore, the cleaning kit includes a rotating shaft, a spiral cleaning ring, a cleaning brush strip, and an electromagnet. The output shaft of the motor is fixedly connected to the top of the rotating shaft. The spiral cleaning ring is sleeved on the outside of the rotating shaft. Retracted ends are provided on both sides of the spiral cleaning ring. The retracted end at the top of the spiral cleaning ring is fixedly connected to the top of the rotating shaft. The electromagnet is installed at the bottom of the rotating shaft. When the electromagnet is energized, it generates magnetic force to attract the retracted end at the bottom of the spiral cleaning ring for fixation. The cleaning brush strip is provided on the outside of the spiral cleaning ring.

[0024] Advantages of the present invention:

[0025] 1. The technical solution of this application uses a cleaning component to clean dust and other substances on the surface of the heat exchange tube to avoid affecting the heat exchange efficiency.

[0026] 2. The wavy heat exchange tube improves the heat exchange efficiency and transfers the heat in the flue gas to the heat exchange tube as much as possible. At the same time, the design of the cleaning component can adapt to the wavy heat exchange tube and clean its surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a boiler waste heat recovery device.

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of a boiler waste heat recovery device.

[0029] Figure 3 Schematic diagram of hiding the wall of the heat exchange box Figure 1 .

[0030] Figure 4 Schematic diagram of hiding the wall of the heat exchange box Figure 2 .

[0031] Figure 5 This is a schematic diagram of the cleaning component structure.

[0032] Figure 6 Schematic diagram of the hidden heat exchange box wall and cleaning components.

[0033] Figure 7 Schematic diagram of the heat exchange tube structure.

[0034] In the figure: 1. heat exchange box, 2. diverter box, 21. connecting flange, 3. converging box, 4. heat exchange tube, 41. front end tube, 42. rear end tube, 43. wave tube, 5. air inlet pipe, 51. diverter pipe, 6. air outlet pipe, 7. cleaning assembly, 71. rotating motor, 72. gear, 73. rotating track, 74. matching track, 75. linear motor platform, 76. mounting bracket, 77. cleaning motor, 78. cleaning kit, 781. rotating shaft, 782. spiral cleaning ring, 783. cleaning brush, 784. electromagnet. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0036] An embodiment of the present application provides a boiler waste heat recovery device.

[0037] Example 1, as Figure 1-7 shown.

[0038] A boiler waste heat recovery device includes a heat exchange box 1. Flue gas and water transfer heat within the heat exchange line, reducing the flue gas temperature and increasing the water temperature, thereby recovering the waste heat in the flue gas. A base is installed at the bottom of the heat exchange box 1. A diverter box 2 and a converging box 3 are installed at the front and rear ends of the heat exchange box 1, respectively. The device also includes heat exchange tubes 4 located within the heat exchange box 1, with several heat exchange tubes 4 installed between the diverter box 2 and the converging box 3. The heat exchange tubes 4 are evenly spaced along the length of the heat exchange box 1 to increase the contact area between the flue gas and the heat exchange tubes 4. Water is transported to the diverter box 2 through other equipment, then flows through the heat exchange tubes 4 and into the converging box 3. Heat transfer occurs between the flue gas and the water through the walls of the heat exchange tubes 4. Heat in the flue gas is transferred to the walls of the heat exchanger and then to the water, increasing the water temperature while decreasing the flue gas temperature. The front side of the diversion box 2 is equipped with a connecting flange 21 to facilitate connecting pipes and introducing water into the diversion box 2. The design of the converging box 3 allows the water in each of the heat exchange tubes 4 to converge in the converging box 3 and merge with each other, thereby keeping the water temperature uniform for subsequent use.

[0039] The heat exchange tube 4 includes a front end tube 41, a rear end tube 42, and a wave tube 43. The front end of the wave tube 43 is connected to the front end tube 41, which is connected to the diversion box 2. The rear end of the wave tube 43 is connected to the rear end tube 42, which is connected to the convergence box 3. The wave tube 43 is a plurality of U-shaped tubes connected end to end. The design of the wave tube 43 increases the length of the heat exchange tube 4, allowing water to flow through the heat exchange box 1 for a longer time, thereby improving the heat exchange efficiency. The increased contact area with the flue gas also greatly improves the heat exchange efficiency of the flue gas.

[0040] A boiler waste heat recovery device includes an air inlet pipe 5 installed on one side of the heat exchange box 1; an air outlet pipe 6 installed on one side of the heat exchange box 1; a plurality of diversion pipes 51 are installed between the air inlet pipe 5 and the heat exchange box 1, and an access end is provided at the bottom of the diversion pipe 51, and the access end is connected to the heat exchange box 1.

[0041] The inlet pipe 5 and the outlet pipe 6 are located on either side of the heat exchange box 1. Flue gas is introduced from the inlet pipe 5 through the diverter pipe 51 into the heat exchange box 1 and then discharged from the outlet pipe 6. Waste heat from the flue gas is recovered in the heat exchange box 1. Two groups of diverter pipes 51 are symmetrically arranged on one side of the heat exchange box 1, with each group containing three. The diverter pipes 51 are interconnected by pipes. The arrangement of the diverter pipes 51 allows flue gas to be injected into the heat exchange box 1 from multiple angles, ensuring sufficient contact with the heat exchange tubes 4.

[0042] A boiler waste heat recovery device includes a cleaning component 7 installed inside the heat exchange box 1 to clean the surface of the heat exchange tube 4. The design of the cleaning component 7 can clean the wavy surface of the heat exchange tube 4.

[0043] The cleaning assembly 7 includes a rotating motor 71, a gear 72, a rotating track 73, a matching track 74, a linear motor platform 75, a mounting bracket 76, a cleaning motor 77, and a cleaning kit 78. A rotating motor 71 is installed on one side of the heat exchange box 1, and the output shaft of the rotating motor 71 extends to the inside of the heat exchange box 1 and is installed with the gear 72. The heat exchange box 1 is rotatably connected to the rotating track 73 on the side wall of the inner cavity close to the motor, and the inner side of the rotating track 73 is engaged with the gear 72 for transmission. The heat exchange box 1 is rotatably connected to the matching track 74 on the side wall of the inner cavity away from the motor, and the linear motor platform 75 is installed between the rotating track 73 and the matching track 74. The mounting bracket 76 is installed on the slider of the linear motor platform 75, and the cleaning motor 77 is installed on the inner side of the mounting bracket 76. The output shaft of the cleaning motor 77 extends to the bottom of the mounting bracket 76, and is provided with the cleaning kit 78. The outer surface of the heat exchange tube 4 is cleaned by the cleaning kit 78. During operation, the rotating motor 71 drives the mating track 74 via the gear 72, which in turn drives the linear motor platform 75 to rotate and adjust its position. Once adjusted to the desired position, the linear motor platform 75 drives the cleaning motor 77 to move, adjusting its position. Finally, the cleaning motor 77 is activated, and the cleaning kit 78 is used to clean the surface of the heat exchange tube 4. During the cleaning process, the mating motor and the linear motor platform 75 work in conjunction, allowing the cleaning motor 77 to sequentially clean various locations on the heat exchange tube 4.

[0044] The cleaning kit 78 includes a rotating shaft 781, a spiral cleaning ring 782, a cleaning brush 783, and an electromagnet 784. The output shaft of the motor is fixedly connected to the top of the rotating shaft 781. The spiral cleaning ring 782 is sleeved on the outside of the rotating shaft 781. Both sides of the spiral cleaning ring 782 are provided with retracted ends. The retracted ends at the top of the spiral cleaning ring 782 are fixedly connected to the top of the rotating shaft 781. The electromagnet 784 is installed at the bottom of the rotating shaft 781. When the electromagnet 784 is energized, it generates magnetic force to attract the retracted end at the bottom of the spiral cleaning ring 782 for fixation. The cleaning brush 783 is provided on the outside of the spiral cleaning ring 782. During use, the output shaft of the cleaning motor 77 rotates, driving the spiral cleaning ring 782 to rotate. When the electromagnet 784 is energized, the retracted end of the spiral cleaning ring 782 is fixed to the bottom end of the rotating shaft 781, allowing the spiral cleaning ring 782 to rotate only around the rotating shaft 781. Due to the spiral shape of the spiral cleaning ring 782, it can produce a certain amount of deformation during rotation, which can increase its cleaning range. At the same time, when the spiral cleaning ring 782 collides with the heat exchange tube 4, it will not damage the heat exchange tube 4, but will only remove impurities adhering to the surface.

[0045] Example 2, as Figure 1-7 shown.

[0046] The heat exchange boxes 1 are provided with two, one in front and one in the back. The two heat exchange boxes 1 can perform heat exchange on the flue gas twice, further improving the recovery rate of the flue gas waste heat.

[0047] The converging box 3 of the front heat exchanger box 1 and the diverter box 2 of the rear heat exchanger box 1 are connected via a pipe. The outlet pipe 6 of the front heat exchanger box 1 and the inlet pipe 5 of the rear heat exchanger box 1 are also connected via a pipe. Flue gas is directed from the outlet pipe 6 of the first heat exchanger box 1 into the inlet pipe 5 of the second heat exchanger box 1, and then into the second heat exchanger box 1. Water is directed from the converging box 3 of the first heat exchanger box 1 into the diverter box 2 of the second heat exchange line, and then into the second heat exchanger box 1.

[0048] When the present invention is used:

[0049] The flue gas is introduced into the introduction pipe through a pipeline, a water pipeline is connected to the connection flange, and water is then introduced into the diversion box to start the recovery of the flue gas waste heat.

[0050] After a period of use, the cleaning assembly is used to clean the surface of the heat exchange tube according to the condition of the surface, thereby improving the heat exchange efficiency and the utilization rate of the flue gas waste heat.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0052] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in this application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the claims. It should be understood that the present application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is limited only by the appended claims.

Claims

1. A boiler waste heat recovery device, characterized by: It includes a heat exchange box, with a diversion box and a converging box installed at the front and rear ends of the heat exchange box respectively; The heat exchange tube is located inside the heat exchange box, and several of the heat exchange tubes are installed between the diverter box and the convergence box. The heat exchange tube includes a front end tube, a rear end tube, and a wave tube. The front end of the wave tube is connected to the front end tube, the front end tube is connected to the diverter box, the rear end of the wave tube is connected to the rear end tube, and the rear end tube is connected to the convergence box. The wave tube is a plurality of U-shaped tubes connected end to end. An air inlet pipe is installed on one side of the heat exchange box; An air outlet pipe is installed on one side of the heat exchange box; A cleaning component is installed inside the heat exchange box to clean the surface of the heat exchange tube; The cleaning assembly includes a rotating motor, a gear, a rotating track, a matching track, a linear motor platform, a mounting frame, a cleaning motor, and a cleaning kit. A rotating motor is installed on one side of the heat exchange box, and the output shaft of the rotating motor extends to the inside of the heat exchange box and is installed with the gear. The heat exchange box is rotatably connected to the rotating track on the side wall of the inner cavity close to the rotating motor, and the inner side of the rotating track is meshed with the gear for transmission. The heat exchange box is rotatably connected to the matching track on the side wall of the inner cavity away from the rotating motor. The linear motor platform is installed between the rotating track and the matching track, the mounting frame is installed on the slider of the linear motor platform, and the cleaning motor is installed on the inside of the mounting frame. The output shaft of the cleaning motor extends to the bottom of the mounting frame, and a cleaning kit is provided. The outer surface of the heat exchange tube is cleaned by the cleaning kit.

2. The boiler waste heat recovery equipment according to claim 1, characterized in that: A base is installed at the bottom of the heat exchange box.

3. The boiler waste heat recovery equipment according to claim 1, characterized in that: The heat exchange tubes are installed at equal intervals along the length direction of the heat exchange box.

4. The boiler waste heat recovery equipment according to claim 1, characterized in that: A plurality of shunt pipes are installed between the air inlet pipe and the heat exchange box. An access end is provided at the bottom of the shunt pipe, and the access end is communicated with the heat exchange box.

5. The boiler waste heat recovery equipment according to claim 4, characterized in that: There are two groups of diverter pipes, which are symmetrically arranged on one side of the heat exchange box, with three pipes in each group. The diverter pipes are connected through pipelines.

6. The boiler waste heat recovery equipment according to claim 1, characterized in that: There are two heat exchange boxes.

7. The boiler waste heat recovery equipment according to claim 1, characterized in that: A connecting flange is installed on the front side of the diverter box.

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