Boiler waste heat recovery equipment

Abstract

Boiler waste heat recovery equipment comprises a heat exchange box, and a flow dividing box and a gathering box are installed at the front end and the rear end of the heat exchange box correspondingly. The heat exchange pipes are located in the heat exchange box, and the multiple heat exchange pipes are installed between the flow dividing box and the converging box; the air inlet pipe is mounted on one side of the heat exchange box; the air outlet pipe is mounted on one side of the heat exchange box; the cleaning assembly is mounted in the heat exchange box and is used for cleaning the surfaces of the heat exchange tubes; according to the technical scheme, dust and the like on the surfaces of the heat exchange pipes are cleaned through the cleaning assembly, and the heat exchange efficiency is prevented from being affected; the heat exchange efficiency is improved through the wave-shaped heat exchange pipe, heat in smoke is transmitted to the heat exchange pipe as much as possible, and meanwhile the cleaning assembly can adapt to the wave-shaped heat exchange pipe and clean the surface of the wave-shaped heat exchange pipe.

Description

Technical Field

[0001] The 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 to improve energy utilization efficiency and save fuel. Waste heat refers to energy that is not utilized in energy utilization equipment under certain economic and technical conditions, that is, redundant and waste energy. It includes high-temperature waste heat, cooling medium waste heat, waste steam and waste water waste heat, high-temperature product and slag waste heat, chemical reaction waste heat, combustible waste gas, waste liquid and waste material waste heat, and high-pressure fluid waste pressure. In the boiler system, flue gas waste heat is the main source of waste heat.

[0003] Nowadays, when utilizing waste heat from flue gas, heat exchangers are often used. 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 can transfer the heat of high-temperature flue gas to the medium that needs to be heated (such as water, air, etc.), thereby improving the utilization efficiency of thermal energy. However, during use, dust and other substances carried in the flue gas are easily adsorbed on the surface of the heat exchange tube, resulting in reduced heat transfer efficiency.

[0004] In response to the above problems, we provide a boiler waste heat recovery device. 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 in that:

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

[0008] A heat exchange tube is 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] A 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 shunt pipes are installed between the air inlet pipe and the heat exchange box, and an access end is provided at the bottom of the shunt 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 diverter pipes in each group, and the diverter pipes are connected by 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 converging 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 is connected to the diverting box of the rear heat exchange box via a pipeline.

[0021] Furthermore, the air outlet pipe of the front heat exchange box is connected to the air inlet pipe of the rear heat exchange box 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 exchanger box, and the output shaft of the rotating motor extends to the inside of the heat exchanger box and is installed with the gear. The heat exchanger 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 meshed with the gear for transmission. The heat exchanger box is rotatably connected to the matching track on the inner cavity side wall away from the 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, 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 the cleaning kit is provided, and 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 end of the rotating shaft, the spiral cleaning ring is sleeved on the outside of the rotating shaft, and 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, and 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 end of the spiral cleaning ring for fixation, and 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 the like on the surface of the heat exchange tube to avoid affecting the heat exchange efficiency.

[0026] 2. The corrugated 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 corrugated heat exchange tube and clean its surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a schematic diagram of the structure of a boiler waste heat recovery device.

[0028] Figure 2 The present invention 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 hiding the heat exchanger 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 frame, 77. cleaning motor, 78. cleaning kit, 781. rotating shaft, 782. spiral cleaning ring, 783. cleaning brush bar, 784. electromagnet. DETAILED DESCRIPTION

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

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

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

[0038] A boiler waste heat recovery device includes a heat exchange box 1, and flue gas and water complete heat transfer inside the heat exchange line, the flue gas temperature decreases, and the water temperature increases, so as to realize the recovery and utilization of 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 convergence box 3 are installed at the front and rear ends of the heat exchange box 1 respectively; a boiler waste heat recovery device includes a heat exchange tube 4, which is located inside the heat exchange box 1, and a plurality of the heat exchange tubes 4 are installed between the diverter box 2 and the convergence box 3. The heat exchange tubes 4 are installed at equal intervals along the length direction of the heat exchange box 1, so as 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, and then flows through the heat exchange tubes 4 and then flows into the convergence box 3. Heat is transferred between the flue gas and the water through the wall of the heat exchange tube 4. The heat in the flue gas is transferred to the wall of the heat exchanger, and then transferred to the water through the wall of the heat exchanger, so that the temperature of the water increases and the temperature of the flue gas decreases. A connecting flange 21 is installed on the front side of the diverter box 2 to facilitate connecting a pipeline and introducing water into the diverter 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, the front end tube 41 is connected to the diversion box 2, the rear end of the wave tube 43 is connected to the rear end tube 42, and the rear end tube 42 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, so that the water can flow through the heat exchange box 1 for a longer time, thereby making the heat exchange efficiency higher. The contact area with the flue gas is increased, and the heat exchange efficiency of the flue gas is greatly improved.

[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 shunt 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 shunt pipe 51, and the access end is connected to the heat exchange box 1.

[0041] The air inlet pipe 5 and the air outlet pipe 6 are respectively located on both sides of the heat exchange box 1. The flue gas is introduced into the heat exchange box 1 from the air inlet pipe 5 through the diverter pipe 51, and then discharged from the air outlet pipe 6. In the heat exchange box 1, the waste heat of the flue gas is recovered. There are two groups of diverter pipes 51, which are symmetrically arranged on one side of the heat exchange box 1. Each group has three diverter pipes, and the diverter pipes 51 are connected by pipes. The diverter pipes 51 are arranged so that the flue gas can be sprayed into the heat exchange box 1 from multiple angles, so that it can fully 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 frame 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 inner cavity side wall close to the motor, and the inner side of the rotating track 73 is meshed with the gear 72 for transmission. The heat exchange box 1 is rotatably connected to the matching track 74 on the inner cavity side wall away from the motor. The linear motor platform 75 is installed between the rotating track 73 and the matching track 74, the mounting frame 76 is installed on the slider of the linear motor platform 75, the cleaning motor 77 is installed on the inner side of the mounting frame 76, the output shaft of the cleaning motor 77 extends to the bottom of the mounting frame 76, and is provided with the cleaning kit 78, and the outer surface of the heat exchange tube 4 is cleaned by the cleaning kit 78. When in use, the rotating motor 71 drives the matching track 74 to rotate through the gear 72, and then drives the linear motor platform 75 to rotate and adjust the position. After adjusting to a suitable position, the linear motor platform 75 drives the cleaning motor 77 to move, adjust the position of the cleaning motor 77, and finally the cleaning motor 77 is started, and the surface of the heat exchange tube 4 is cleaned through the cleaning kit 78. During the cleaning process, the matching motor works in conjunction with the linear motor platform 75, so that the cleaning motor 77 can clean each position of the heat exchange tube 4 in turn.

[0044] The cleaning kit 78 includes a rotating shaft 781, a spiral cleaning ring 782, a cleaning brush strip 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 outer side of the rotating shaft 781. Both sides of the spiral cleaning ring 782 are provided with retracted ends. The retracted end at the top of the spiral cleaning ring 782 is 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 strip 783 is arranged on the outer side of the spiral cleaning ring 782. When in 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 at the bottom of the spiral cleaning ring 782 is fixed to the bottom of the rotating shaft 781, so that the spiral cleaning ring 782 can only rotate around the rotating shaft 781. Since the spiral cleaning ring 782 is spiral, it can produce a certain 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 only remove impurities adhering to the surface.

[0045] Embodiment 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 exchange box 1 is connected to the diverting box 2 of the rear heat exchange box 1 through a pipe. The outlet pipe 6 of the front heat exchange box 1 is connected to the inlet pipe 5 of the rear heat exchange box 1 through a pipe. The flue gas is introduced from the outlet pipe 6 of the first heat exchange box 1 into the inlet pipe 5 of the second heat exchange box 1, and then into the second heat exchange box 1. The water is introduced from the converging box 3 of the first heat exchange box 1 into the diverting box 2 of the second heat exchange line, and then into the second heat exchange 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, and the recovery of the flue gas waste heat can be started.

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

[0051] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 device.

[0052] Those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the claims. It should be understood that the present application is not limited to the precise structure described above and shown in the 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 attached claims.

Claims

1. A boiler waste heat recovery device, characterized in that: It includes a heat exchange box, and a diversion box and a converging box are 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 a plurality of the heat exchange tubes are installed between the diverter box and the converging 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.

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

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

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

8. The boiler waste heat recovery device according to claim 1, characterized in that: 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 converging box.

9. The boiler waste heat recovery device according to claim 8, characterized in that: The wave tube is a plurality of U-shaped tubes connected end to end.

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