Heat exchange device for boiler tail gas waste heat recovery

Abstract

The utility model relates to the technical field of heat exchange, and discloses a heat exchange device for boiler tail gas waste heat recovery, which comprises a heat exchange box, the upper end of the heat exchange box is fixedly connected with a gas inlet pipe, the lower end of the heat exchange box is fixedly connected with a slag discharge pipe, and one side of the lower end of the heat exchange box is fixedly connected with a gas outlet box. The upper end of the air outlet box is fixedly connected with an air outlet pipe, the bottom faces of the heat exchange box and the air outlet box are fixedly connected with a support, a plurality of heat exchange water pipes penetrate through the interior of the heat exchange box, the upper end of the interior of the heat exchange box is further connected with a moving mechanism, the output end of the moving mechanism is connected with a cleaning assembly, and the cleaning assembly is connected with the heat exchange water pipes in a matched mode. According to the heat exchange device for boiler tail gas waste heat recovery, when heat exchange is conducted between the heat exchange box and the heat exchange water pipe, the cleaning assembly can be controlled to move through the moving mechanism, so that impurities adhering to the surface of the heat exchange water pipe can be cleaned, and then the heat exchange effect of the heat exchange water pipe can be affected by the surface impurities.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange technical field, concretely is a kind of heat exchange device for boiler tail gas waste heat recovery. BACKGROUND

[0002] Boiler tail gas refers to the exhaust gas discharged from the boiler, which is produced in the combustion process of fuel (such as coal, oil, natural gas, biomass, etc.). There is still a certain degree of heat in the tail gas after boiler combustion, so in order to improve energy utilization efficiency, reduce energy waste, reduce operating costs and reduce the negative impact on the environment, heat recovery of heat in the tail gas is often used, and the current commonly used is a heat exchange device.

[0003] The patent with the publication number CN221593561U discloses a heat exchange device for boiler tail gas waste heat recovery, which includes an air inlet pipe and an air outlet pipe. It also includes a waste heat recovery mechanism. The waste heat recovery mechanism includes a jacket set outside the air inlet pipe and the air outlet pipe. The outer wall of the jacket is provided with a water inlet pipe connected to the jacket at the upper end. The lower end of the outer wall of the jacket is provided with a water outlet pipe connected to the jacket. The inside of the jacket is provided with a first heat exchange assembly. The first heat exchange assembly includes a connecting pipe connected to the air inlet pipe and the air outlet pipe. The connecting pipe is spirally coiled between the air inlet pipe and the air outlet pipe. The connecting pipe is equally spaced and surrounded by multiple groups. The device has a simple structure and is easy to use. By setting the waste heat recovery mechanism to work with the first and second heat exchange assemblies, it has double heat exchange capacity, thereby improving the heat exchange capacity of the boiler tail gas and the efficiency of the tail gas waste heat utilization.

[0004] However, the above-mentioned heat exchange device still has the following problems in actual use:

[0005] In the tail gas after combustion of the boiler, not only heat exists, but also a large amount of impurities. These impurities will stick to the surface of the heat exchange pipe when they enter the heat exchange device with the tail gas. Although the heat in the tail gas will be absorbed by the heat exchange pipe in the heat exchange device to achieve heat exchange, part of the impurities in the tail gas will also stick to the surface of the heat exchange pipe, thereby affecting the heat exchange effect of the heat exchange pipe and reducing the heat exchange efficiency. INVENTION CONTENTS

[0006] In view of the shortcomings of the prior art, the utility model provides a heat exchange device for boiler tail gas waste heat recovery, which can clean the impurities on the surface of the heat exchange water pipe during heat exchange.

[0007] To achieve the above object, the utility model provides following technical scheme: a heat exchange device for boiler tail gas waste heat recovery, including heat exchange box, the upper end of heat exchange box is fixedly connected with air inlet pipe, the lower end of heat exchange box is fixedly connected with slag discharge pipe, the side of heat exchange box lower end is fixedly connected with the air outlet box, the upper end of air outlet box is fixedly connected with air outlet pipe, the bottom surface of heat exchange box and air outlet box is fixedly connected with support, the inside of heat exchange box is penetrated with a plurality of heat exchange water pipes, the upper end in the heat exchange box is also connected with moving mechanism, the output of moving mechanism is connected with cleaning assembly, and cleaning assembly is matched with a plurality of heat exchange water pipes and is connected, the junction of heat exchange box and air outlet box is fixedly connected with the screen, and the lower end of cleaning assembly is connected with anti -blocking component, and the lower end of anti -blocking component is opposite to the screen.

[0008] Further, the moving mechanism includes a cleaning motor, a threaded rod, and a slide rod. The outer wall of the cleaning motor is fixedly connected to the upper end of the outer wall of the heat exchange box. The output shaft of the cleaning motor is fixedly connected to one end of the threaded rod. The other end of the threaded rod penetrates the outer wall of the heat exchange box and is rotationally connected to the penetration of the heat exchange box. The threaded rod is arranged in parallel with the slide rod. The two ends of the slide rod are respectively fixedly connected to the two sides of the upper end of the heat exchange box. The threaded rod and the slide rod are both connected to the cleaning assembly.

[0009] Further, the cleaning assembly includes a cleaning plate and two moving blocks. One of the moving blocks is sleeved and threadedly connected to the outer wall of the threaded rod. The other moving block is sleeved and slidingly connected to the outer wall of the slide rod. The lower ends of the two moving blocks are respectively fixedly connected to the two sides of the upper end of the cleaning plate. The cleaning plate is sleeved and slidingly connected to the outer wall of the plurality of heat exchange water pipes. One side of the bottom surface of the cleaning plate is connected to the upper end of the anti-blocking component.

[0010] Further, the anti-blocking component includes an extension plate, a support plate, and a cleaning brush. The upper end of the extension plate is fixedly connected to one side of the bottom surface of the cleaning plate close to the screen. The lower end of the extension plate is connected to the upper end of the support plate. One side of the support plate is fixedly connected to the cleaning brush. The other side of the cleaning brush is opposite to the surface of the screen.

[0011] Further, the side of the extension plate away from the screen is provided with a mounting cavity. The upper end of the support plate is fixedly connected with a connecting block. The connecting block is fastened to the mounting cavity through a plurality of first bolts.

[0012] Further, the inner wall of the cleaning plate is fixedly connected with a plurality of cleaning rubber rings. The plurality of cleaning rubber rings are respectively sleeved and slidingly connected to the outer wall of the plurality of heat exchange water pipes.

[0013] Further, the side of the heat exchange box away from the air outlet box is penetrated with a cleaning port. The inner wall of the cleaning port is slidingly connected with a sealing door. The side of the sealing door located outside the heat exchange box is fixedly connected with a plurality of mounting blocks. The plurality of mounting blocks are fastened to the heat exchange box through second bolts.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The heat exchange device for boiler tail gas waste heat recovery has the following beneficial effects.

[0016] The heat exchange device for boiler tail gas waste heat recovery has the following beneficial effects.

[0017] The heat exchange device for boiler tail gas waste heat recovery has the following beneficial effects. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a whole appearance schematic diagram.

[0019] Figure 2 The utility model discloses the internal structure schematic diagram of heat exchange box.

[0020] Figure 3 The utility model discloses the section schematic diagram of heat exchange box and outlet gas tank.

[0021] Figure 4 The utility model discloses the detailed connection schematic diagram of moving mechanism, cleaning assembly and prevent blocking subassembly.

[0022] In the drawing: 1, heat exchange box, 2, outlet gas tank, 3, outlet gas pipe, 4, inlet pipe, 5, discharge pipe, 6, cleaning motor, 7, slide bar, 8, heat exchange water pipe, 9, threaded rod, 10, moving block, 11, cleaning plate, 12, cleaning rubber ring, 13, mounting block, 14, sealing door, 15, extension plate, 16, support plate, 17, screen, 18, connecting block, 19, cleaning brush, 20, support, 101, cleaning port, 151, installation cavity. DETAILED DESCRIPTION

[0023] The technical scheme in the utility model embodiments will be clearly and completely described with reference to the accompanying drawings in the utility model embodiments, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0024] Please refer to Figures 1-4The utility model provides a heat exchange device for boiler tail gas waste heat recovery, including heat exchange box 1, the upper end of heat exchange box 1 is fixedly connected with inlet pipe 4, the lower end of heat exchange box 1 is fixedly connected with discharge pipe 5, the lower end of heat exchange box 1 one side is fixedly connected with outlet box 2, the upper end of outlet box 2 is fixedly connected with outlet pipe 3, the bottom of heat exchange box 1 and outlet box 2 is fixedly connected with support 20, and the inside of heat exchange box 1 is penetrated with a plurality of heat exchange water pipes 8, and the upper end in the inside of heat exchange box 1 is also connected with moving mechanism, and the output of moving mechanism is connected with cleaning assembly, and cleaning assembly is matched with a plurality of heat exchange water pipes 8, and the junction of heat exchange box 1 and outlet box 2 is fixedly connected with screen 17, and the lower end of cleaning assembly is connected with anti -blocking component, and the lower end of anti -blocking component is opposite screen 17.

[0025] As Figures 1-4 The utility model discloses a heat exchange device for boiler tail gas waste heat recovery, including heat exchange box 1, the upper end of heat exchange box 1 is fixedly connected with inlet pipe 4, the lower end of heat exchange box 1 is fixedly connected with discharge pipe 5, the lower end of heat exchange box 1 one side is fixedly connected with outlet box 2, the upper end of outlet box 2 is fixedly connected with outlet pipe 3, the bottom of heat exchange box 1 and outlet box 2 is fixedly connected with support 20, and the inside of heat exchange box 1 is penetrated with a plurality of heat exchange water pipes 8, and the upper end in the inside of heat exchange box 1 is also connected with moving mechanism, and the output of moving mechanism is connected with cleaning assembly, and cleaning assembly is matched with a plurality of heat exchange water pipes 8, and the junction of heat exchange box 1 and outlet box 2 is fixedly connected with screen 17, and the lower end of cleaning assembly is connected with anti -blocking component, and the lower end of anti -blocking component is opposite screen 17.

[0026] And during heat exchange, the tail gas that enters the inside of heat exchange box 1 will enter outlet box 2 from the screen 17 at the lower end of heat exchange box 1, but the impurities in the tail gas and the impurities scraped down by the cleaning assembly can possibly follow the wind and enter outlet box 2, to avoid these impurities from blocking outlet box 2, the screen 17 can be used to block the impurities, but the screen 17 can also be blocked after being used for a period of time, reducing the ventilation efficiency, to avoid the blocking of the screen 17, the anti-blocking component at the lower end of the cleaning assembly can also move along with the cleaning assembly when the cleaning assembly is used to clean the surface of the heat exchange water pipes 8, and thus the surface of the screen 17 can be wiped, so that the impurities blocked on the surface of the screen 17 can be cleaned, reducing the probability of blocking.

[0027] As Figures 1-4As shown, the moving mechanism comprises a cleaning motor 6, a threaded rod 9 and a slide rod 7, the outer wall of the cleaning motor 6 is fixedly connected with the upper end of the outer wall of the heat exchange box 1, the output shaft of the cleaning motor 6 is fixedly connected with one end of the threaded rod 9, the other end of the threaded rod 9 penetrates through the outer wall of the heat exchange box 1 and is rotationally connected with the penetration of the heat exchange box 1, the threaded rod 9 is arranged in parallel with the slide rod 7, the two ends of the slide rod 7 are respectively fixedly connected with the two sides of the upper end of the heat exchange box 1, and the threaded rod 9 and the slide rod 7 are connected with the cleaning assembly.

[0028] More specifically, when the heat exchange water pipes 8 in the heat exchange box 1 need to be cleaned, the cleaning motor 6 is started, the output shaft of the cleaning motor 6 drives the threaded rod 9 to rotate, then the threaded rod 9 rotates to drive the cleaning assembly in the heat exchange box 1 to move along the surface of the heat exchange water pipes 8 through the cooperation of the slide rod 7, so that the impurities adhered to the surface of the heat exchange water pipes 8 can be pushed off and scraped off during the movement.

[0029] As shown in the figure, Figures 1-4 The cleaning assembly comprises a cleaning plate 11 and two moving blocks 10, one of the moving blocks 10 is sleeved and threadedly connected with the outer wall of the threaded rod 9, the other moving block 10 is sleeved and slidingly connected with the outer wall of the slide rod 7, the lower ends of the two moving blocks 10 are respectively fixedly connected with the two sides of the upper end of the cleaning plate 11, the cleaning plate 11 is sleeved and slidingly connected with the outer walls of the heat exchange water pipes 8, and one side of the bottom surface of the cleaning plate 11 is connected with the upper end of the anti-blocking assembly.

[0030] More specifically, when the threaded rod 9 rotates, the two moving blocks 10 are driven to move through the cooperation of the threaded rod 9 and the slide rod 7, then the two moving blocks 10 drive the cleaning plate 11 between them to move along the heat exchange water pipes 8, so that the impurities adhered to the surface of the heat exchange water pipes 8 can be pushed off and scraped off during the movement.

[0031] As shown in the figure, Figures 1-4 The anti-blocking assembly comprises an extension plate 15, a support plate 16 and a cleaning brush 19, the upper end of the extension plate 15 is fixedly connected with one side of the bottom surface of the cleaning plate 11 close to the mesh 17, the lower end of the extension plate 15 is connected with the upper end of the support plate 16, one side of the support plate 16 is fixedly connected with the cleaning brush 19, and the other side of the cleaning brush 19 abuts against the surface of the mesh 17. The side of the extension plate 15 away from the mesh 17 is provided with a mounting cavity 151, the upper end of the support plate 16 is fixedly connected with a connecting block 18, and the connecting block 18 is fastened with the mounting cavity 151 through a plurality of first bolts.

[0032] More specifically, when the cleaning plate 11 moves, the extension plate 15 moves together, and then the extension plate 15 drives the support plate 16 to move through the connection of the first bolts and the connecting block 18, then the support plate 16 drives the cleaning brush 19 to move, and the cleaning brush 19 can scrape off the impurities adhered and blocked on the surface of the mesh 17 after moving.

[0033] As Figures 1-4 shown, the inner wall of the cleaning plate 11 is fixedly connected with a plurality of cleaning rubber rings 12, and the plurality of cleaning rubber rings 12 are sleeved and slidingly connected with the outer walls of the plurality of heat exchange water pipes 8.

[0034] More specifically, by arranging the cleaning rubber rings 12, firstly, the cleaning effect of the cleaning plate 11 on the surface of the heat exchange water pipes 8 can be increased, and secondly, the abrasion between the cleaning plate 11 and the heat exchange water pipes 8 can be reduced.

[0035] As Figures 1-4 shown, the side of the heat exchange box 1 away from the air outlet box 2 is provided with a cleaning port 101, the inner wall of the cleaning port 101 is slidingly connected with a sealing door 14, the sealing door 14 is fixedly connected with a plurality of mounting blocks 13 on the side outside the heat exchange box 1, and the plurality of mounting blocks 13 are fastened with the heat exchange box 1 through the second bolts.

[0036] More specifically, by arranging the cleaning port 101 and the sealing door 14, when the moving mechanism, the cleaning assembly, the heat exchange water pipes 8, the screen 17 and the anti-blocking assembly inside the heat exchange box 1 need to be maintained, the second bolts between the sealing door 14 and the heat exchange box 1 can be opened, and then the inside of the heat exchange box 1 can be accessed through the cleaning port 101, so that the above-mentioned components can be maintained.

[0037] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A heat exchange device for boiler exhaust gas waste heat recovery, comprising a heat exchange box (1), characterized in that: The upper end of the heat exchange box (1) is fixedly connected with an air inlet pipe (4), the lower end of the heat exchange box (1) is fixedly connected with a residue discharge pipe (5), one side of the lower end of the heat exchange box (1) is fixedly connected with an air outlet box (2), the upper end of the air outlet box (2) is fixedly connected with an air outlet pipe (3), the bottom surfaces of the heat exchange box (1) and the air outlet box (2) are fixedly connected with a support (20), a plurality of heat exchange water pipes (8) penetrate through the heat exchange box (1), the upper end of the heat exchange box (1) is further connected with a moving mechanism, the output end of the moving mechanism is connected with a cleaning assembly, the cleaning assembly is matched with the plurality of heat exchange water pipes (8), the connecting part of the heat exchange box (1) and the air outlet box (2) is fixedly connected with a screen (17), the lower end of the cleaning assembly is connected with an anti-blocking assembly, and the lower end of the anti-blocking assembly abuts against the screen (17).

2. A heat exchanging device for recovering exhaust gas waste heat of a boiler according to claim 1, characterized in that: The moving mechanism comprises a cleaning motor (6), a threaded rod (9) and a sliding rod (7), the outer wall of the cleaning motor (6) is fixedly connected with the upper end of the outer wall of the heat exchange box (1), the output shaft of the cleaning motor (6) is fixedly connected with one end of the threaded rod (9), the other end of the threaded rod (9) penetrates through the outer wall of the heat exchange box (1) and is rotationally connected with the penetration part of the heat exchange box (1), the threaded rod (9) is arranged in parallel with the sliding rod (7), the two ends of the sliding rod (7) are fixedly connected with the two sides of the upper end of the heat exchange box (1), and the threaded rod (9) and the sliding rod (7) are connected with the cleaning assembly.

3. A heat exchanging device for recovering exhaust gas waste heat of a boiler according to claim 2, characterized in that: The cleaning assembly comprises a cleaning plate (11) and two moving blocks (10), one of the moving blocks (10) is sleeved and threadedly connected with the outer wall of the threaded rod (9), the other moving block (10) is sleeved and slidingly connected with the outer wall of the sliding rod (7), the lower ends of the two moving blocks (10) are fixedly connected with the two sides of the upper end of the cleaning plate (11), the cleaning plate (11) is sleeved and slidingly connected with the outer walls of the plurality of heat exchange water pipes (8), and one side of the bottom surface of the cleaning plate (11) is connected with the upper end of the anti-blocking assembly.

4. A heat exchanging device for recovering exhaust gas waste heat of a boiler according to claim 3, characterized in that: The anti-blocking assembly comprises an extension plate (15), a supporting plate (16) and a cleaning brush (19), the upper end of the extension plate (15) is fixedly connected with one side of the bottom surface of the cleaning plate (11) close to the screen (17), the lower end of the extension plate (15) is connected with the upper end of the supporting plate (16), one side of the supporting plate (16) is fixedly connected with the cleaning brush (19), and the other side of the cleaning brush (19) abuts against the surface of the screen (17).

5. A heat exchanging device for recovering exhaust gas waste heat of a boiler according to claim 4, characterized in that: The side, away from the screen (17), of the extension plate (15) is provided with a mounting cavity (151), the upper end of the supporting plate (16) is fixedly connected with a connecting block (18), and the connecting block (18) is fastened with the mounting cavity (151) through a plurality of first bolts.

6. A heat exchanging device for recovering exhaust gas waste heat of a boiler according to claim 3, characterized in that: The inner wall of the cleaning plate (11) is fixedly connected with a plurality of cleaning rubber rings (12), and the plurality of cleaning rubber rings (12) are sleeved and slidingly connected with the outer walls of the plurality of heat exchange water pipes (8).

7. A heat exchanging device for recovering exhaust gas waste heat of a boiler according to claim 1, characterized in that: The heat exchange box (1) is provided with a cleaning port (101) penetratingly arranged on the side away from the air outlet box (2), the inner wall of the cleaning port (101) is slidably connected with a sealing door (14), the sealing door (14) is fixedly connected with a plurality of mounting blocks (13) on the side outside the heat exchange box (1), and the mounting blocks (13) are all fastened with the heat exchange box (1) through No. 2 bolts.

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