Industrial boiler with waste heat recovery function

Abstract

The industrial boiler with the waste heat recovery function comprises a boiler body, a smoke outlet pipeline is arranged at the top of the outer wall of one side of the boiler body, a heat recovery assembly is installed in the smoke outlet pipeline, the heat recovery assembly comprises an installation groove formed in the outer wall of the circumference of the smoke outlet pipeline, and an installation pipe is placed in the installation groove; a plurality of first connecting pipes are fixedly mounted on the inner wall of one end of the mounting pipe, two rows of heat absorbing pipes are fixedly inserted into the outer wall of one side of each first connecting pipe, the number of the first connecting pipes in one row is three or more, and one ends of the two rows of heat absorbing pipes on the two sides are fixedly sleeved with the same third connecting pipe. According to the flue gas waste heat recovery device, the heat recovery assembly is arranged, after flue gas is discharged out of the boiler body, waste heat in the flue gas can be effectively recovered, and therefore waste caused by the fact that the heat is dissipated into the external environment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an industrial boiler with waste heat recovery function. Background Technique

[0002] Industrial boiler products are divided into two types. One is steam, which is used for power generation or gas supply. For example, in a fertilizer factory, steam can be used for vaporization. Using coal as raw material to synthesize fertilizers is a typical industrial boiler. Most industrial boilers still use coal. The common industrial boiler is a circulating fluidized bed boiler. Industrial boilers are important thermal energy power equipment.

[0003] After retrieval, a utility model with the Chinese patent publication number CN208505038U discloses an industrial boiler with waste heat recovery function, including support legs and fixed legs. The top of the support legs is welded with a boiler, and the top of the boiler is welded with a first air duct. The first air duct is communicated with the boiler. One end of the first air duct away from the boiler is welded with a steam generator, and both sides of the bottom of the steam generator are welded with fixed rods. The top of the steam generator is welded with a second exhaust pipe.

[0004] In the above-mentioned device, most of the heat dissipated during the use of the boiler is dissipated outward by flue gas. Therefore, the utilization of this part of heat is particularly important and there is room for improvement. Therefore, an industrial boiler with waste heat recovery function is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide an industrial boiler with waste heat recovery function to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an industrial boiler with waste heat recovery function, including a boiler body. A smoke outlet pipe is arranged at the top of the outer wall on one side of the boiler body. A heat recovery component is installed inside the smoke outlet pipe. The heat recovery component includes an installation groove opened on the circumferential outer wall of the smoke outlet pipe, and an installation pipe is placed inside the installation groove. One end of the inner wall of the installation pipe is fixedly installed with a plurality of first connecting pipes. Two rows of heat absorption pipes are fixedly inserted on the outer walls of one side of the plurality of first connecting pipes. The number of the first connecting pipes in one row is more than three. The ends of the two rows of heat absorption pipes on both sides are fixedly sleeved with the same third connecting pipe. Adjacent two rows of heat absorption pipes are fixedly sleeved with the same second connecting pipe.

[0007] As a further preference of the above technical solution, a plurality of baffles are fixedly connected to the inner walls of both ends of the installation pipe, and one end of the plurality of baffles is respectively sleeved outside the plurality of first connecting pipes.

[0008] After the flue gas is discharged from the boiler body, the waste heat in the flue gas can be effectively recovered, thus avoiding the waste caused by the dissipation of this heat into the external environment. The external water supply device enters from the inlet of a connecting pipe three, then enters multiple heat absorption pipes respectively, then enters the interior of a connecting pipe one, then enters several other connected heat absorption pipes, and then enters the connecting pipe two. This process repeats, and finally it is discharged to the outside from another connecting pipe three to form a cycle. When the boiler is working, the flue gas in the combustion chamber is discharged into the smoke outlet pipe. These flue gases first contact multiple adjacent heat absorption pipes, and the heat will be absorbed. Then, it flows along the wavy flue formed by multiple baffles to ensure that the flue gas flow path is longer, so that the heat can be absorbed by multiple heat absorption pipes as much as possible.

[0009] As a further preference of this technical solution, two sealing plates are fixedly connected to the circumferential outer wall of the installation pipe. The two sealing plates are connected to the smoke outlet pipe by bolts, and the sealing plates can cover the edge position of the installation pipe.

[0010] As a further preference of this technical solution, a cleaning component is installed inside the installation pipe. The cleaning component includes multiple ash scraping rings sleeved on the outside of multiple rows of heat absorption pipes. An installation frame is slidably inserted into the outside of the installation pipe, and multiple ash scraping rings are fixedly connected to the installation frame.

[0011] As a further preference of this technical solution, a lead screw is threadedly connected to the middle of the installation frame. The lead screw is rotatably connected to the outside of the installation pipe. A support plate is fixedly connected to the outside of the installation pipe, and a motor is fixedly installed on the outer wall of one side of the support plate. The motor shaft is coaxially fixed to one end of the lead screw.

[0012] After using for a period of time, the dust accumulated on the surface of the heat absorption pipe increases. Start the motor outside the support plate. The motor shaft drives the lead screw to rotate. The restricted installation frame will be driven by the lead screw to move, and the ash scraping ring connected to the installation frame will also scrape on the surface of the heat absorption pipe, and the accumulated dust can be cleaned up to ensure that the heat absorption effect of the heat absorption pipe is good enough.

[0013] As a further preference of this technical solution, the whole installation pipe is made of heat insulation material.

[0014] As a further preference of this technical solution, the lead angle of the lead screw is less than the equivalent friction angle.

[0015] The utility model provides an industrial boiler with the function of waste heat recovery, and has the following beneficial effects:

[0016] (1) By setting up a heat recovery component, the utility model can effectively recover the waste heat in the flue gas after the flue gas is discharged from the boiler body, thus avoiding the waste caused by the dissipation of this heat into the external environment. The external water supply device enters from the inlet of a connecting pipe three, then enters multiple heat absorption pipes respectively, then enters the inside of a connecting pipe one, then enters several other connected heat absorption pipes, and then enters the connecting pipe two, and so on, and finally is discharged to the outside from another connecting pipe three to form a cycle. When the boiler is working, the flue gas in the combustion chamber is discharged into the smoke outlet pipe. These flue gases first contact multiple adjacent heat absorption pipes, and the heat will be absorbed. Then, they flow along the wavy flue formed by multiple baffles to ensure a longer flow path of the flue gas, so that the heat can be absorbed by multiple heat absorption pipes as much as possible.

[0017] (2) By setting up a cleaning component, after using for a period of time, the dust accumulated on the surface of the heat absorption pipe increases. Start the motor outside the support plate, and the motor shaft drives the screw rod to rotate. The restricted mounting frame will be driven by the screw rod to move, and the ash scraping ring connected to the mounting frame will also scrape on the surface of the heat absorption pipe, and the accumulated dust can be cleaned up to ensure that the heat absorption effect of the heat absorption pipe is good enough. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of the utility model;

[0019] Figure 2 is the partial enlarged structural schematic diagram of the utility model;

[0020] Figure 3 is the enlarged structural schematic diagram of the heat recovery component of the utility model;

[0021] Figure 4 is of the utility model Figure 2 enlarged structural schematic diagram at A in;

[0022] In the figure: 1. Boiler body; 2. Smoke outlet pipe; 3. Heat recovery component; 4. Cleaning component; 5. Sealing plate; 301. Installation pipe; 302. Connecting pipe one; 303. Heat absorption pipe; 304. Connecting pipe two; 305. Connecting pipe three; 306. Baffle; 401. Mounting frame; 402. Ash scraping ring; 403. Support plate; 404. Screw rod; 405. Motor. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model.

[0024] The utility model provides technical solutions: As Figure 2 and Figure 3As shown in the figure, in this embodiment, an industrial boiler with waste heat recovery function includes a boiler body 1. At the top of the outer wall on one side of the boiler body 1, there is a smoke outlet pipe 2. Inside the smoke outlet pipe 2, a heat recovery component 3 is installed. The heat recovery component 3 includes an installation groove formed on the circumferential outer wall of the smoke outlet pipe 2, and an installation pipe 301 is placed inside the installation groove. At one end of the inner wall of the installation pipe 301, a plurality of first connecting pipes 302 are fixedly installed. On the outer wall of one side of each of the plurality of first connecting pipes 302, two rows of heat absorption pipes 303 are fixedly inserted. And the number of the first connecting pipes 302 in one row is more than three. At one end of the two rows of heat absorption pipes 303 on both sides, the same third connecting pipe 305 is fixedly sleeved. Adjacent two rows of heat absorption pipes 303 are fixedly sleeved with the same second connecting pipe 304.

[0025] On the inner walls at both ends of the installation pipe 301, a plurality of baffles 306 are fixedly connected, and one end of the plurality of baffles 306 respectively sleeved outside the plurality of first connecting pipes 302.

[0026] The external water supply device enters from the inlet of one third connecting pipe 305, then enters into a plurality of heat absorption pipes 303 respectively, then enters into the interior of one first connecting pipe 302, then enters into several other adjacent heat absorption pipes 303, and then enters into the second connecting pipe 304. Thus, it reciprocates and finally is discharged to the outside from the other third connecting pipe 305 to form a cycle. When the boiler is working, the flue gas in the combustion chamber is discharged into the smoke outlet pipe 2. These flue gases first contact a plurality of adjacent heat absorption pipes 303, and the heat will be absorbed. Then, it flows along the wavy flue formed by the plurality of baffles 306 to ensure that the flue gas flow path is longer, so that the heat can be absorbed by the plurality of heat absorption pipes 303 as much as possible.

[0027] As Figure 1 shown, two sealing plates 5 are fixedly connected to the circumferential outer wall of the installation pipe 301. The two sealing plates 5 are connected to the smoke outlet pipe 2 by bolts, and the sealing plates 5 can cover the edge position of the installation pipe 301, which can prevent the flue gas from emitting outward from the gap between the installation pipe 301 and the smoke outlet pipe 2.

[0028] As Figure 2 and Figure 4 shown, a cleaning component 4 is installed inside the installation pipe 301. The cleaning component 4 includes a plurality of ash scraping rings 402 slidably sleeved outside the multi - row heat absorption pipes 303. An installation frame 401 is slidably inserted outside the installation pipe 301, and the plurality of ash scraping rings 402 are fixedly connected to the installation frame 401.

[0029] A lead screw 404 is threadedly connected to the middle of the installation frame 401. The lead screw 404 is rotatably connected to the outside of the installation pipe 301. A support plate 403 is fixedly connected to the outside of the installation pipe 301. On the outer wall of one side of the support plate 403, a motor 405 is fixedly installed. The rotating shaft of the motor 405 is coaxially fixed to one end of the lead screw 404.

[0030] After being used for a period of time, the dust accumulated on the surface of the heat absorption tube 303 increases. The motor 405 outside the support plate 403 is started, and the rotating shaft of the motor 405 drives the lead screw 404 to rotate. The restricted mounting bracket 401 will be driven by the lead screw 404 to move, and the ash scraping ring 402 connected to the mounting bracket 401 will also scrape on the surface of the heat absorption tube 303, and the accumulated dust can be cleaned up, ensuring that the heat absorption effect of the heat absorption tube 303 is good enough.

[0031] As Figure 2 and Figure 3 shown, the whole installation pipe 301 is made of heat insulation material, which can prevent heat from being dissipated to the external environment through the installation pipe 301.

[0032] As Figure 2 shown, the lead angle of the thread of the lead screw 404 is less than the equivalent friction angle, making it have self-locking property.

[0033] The utility model provides an industrial boiler with the function of waste heat recovery, and the specific working principle is as follows:

[0034] First, install the heat recovery component 3 inside the smoke outlet pipe 2, place the installation pipe 301 in the groove of the smoke outlet pipe 2. At this time, the sealing plate 5 can also cover the gap between the smoke outlet pipe 2 and the installation pipe 301. When the device works, the external water supply device enters from the inlet of a connecting pipe three 305, then enters into a plurality of heat absorption tubes 303 respectively, then enters into a connecting pipe one 302, then enters into several other heat absorption tubes 303 connected, and then enters into the connecting pipe two 304, and so on, and finally is discharged to the outside from another connecting pipe three 305 to form a cycle. When the boiler works, the flue gas in the combustion chamber is discharged into the smoke outlet pipe 2. These flue gases first contact a plurality of adjacent heat absorption tubes 303, and the heat will be absorbed. Then, it flows along the wavy flue formed by a plurality of baffles 306 to ensure that the flue gas flow path is longer, so that the heat can be absorbed by a plurality of heat absorption tubes 303 as much as possible. After being used for a period of time, the dust accumulated on the surface of the heat absorption tube 303 increases. The motor 405 outside the support plate 403 is started, and the rotating shaft of the motor 405 drives the lead screw 404 to rotate. The restricted mounting bracket 401 will be driven by the lead screw 404 to move, and the ash scraping ring 402 connected to the mounting bracket 401 will also scrape on the surface of the heat absorption tube 303, and the accumulated dust can be cleaned up, ensuring that the heat absorption effect of the heat absorption tube 303 is good enough.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An industrial boiler with waste heat recovery function, comprising a boiler body (1), characterized in that: A smoke outlet pipe (2) is arranged at the top of the outer wall of one side of the boiler body (1), and a heat recovery component (3) is installed inside the smoke outlet pipe (2). The heat recovery component (3) comprises a mounting groove provided on the circumferential outer wall of the smoke outlet pipe (2), and a mounting pipe (301) is placed inside the mounting groove. A plurality of connecting pipes (302) are fixedly installed on the inner wall of one end of the mounting pipe (301), and two rows of heat absorbing pipes (303) are fixedly plugged into the outer wall of one side of the plurality of connecting pipes (302), and the number of connecting pipes (302) in one row is more than three. The two rows of heat absorbing pipes (303) on both sides are fixedly sleeved with the same connecting pipe three (305) at one end, and the two adjacent rows of heat absorbing pipes (303) are fixedly sleeved with the same connecting pipe two (304).

2. The industrial boiler with waste heat recovery function according to claim 1, characterized in that: The inner walls at both ends of the installation tube (301) are fixedly connected with a plurality of baffles (306), and the plurality of baffles (306) at one end are respectively sleeved on the outside of the plurality of connecting tubes (302).

3. The industrial boiler with waste heat recovery function according to claim 1, characterized in that: Two sealing plates (5) are fixedly connected to the circumferential outer wall of the installation tube (301); the two sealing plates (5) are connected to the smoke outlet pipe (2) via bolts, and the sealing plates (5) can cover the edge of the installation tube (301).

4. The industrial boiler with waste heat recovery function according to claim 1, characterized in that: A cleaning assembly (4) is installed inside the installation tube (301), and the cleaning assembly (4) includes a plurality of scraper rings (402) slidably mounted outside the plurality of rows of heat absorbing tubes (303). A mounting frame (401) is slidably inserted outside the installation tube (301), and the plurality of scraper rings (402) are fixedly connected to the mounting frame (401).

5. The industrial boiler with waste heat recovery function according to claim 4, characterized in that: A screw rod (404) is threadedly connected to the middle of the mounting frame (401), and the screw rod (404) is rotatably connected to the outside of the mounting tube (301). A support plate (403) is fixedly connected to the outside of the mounting tube (301), and a motor (405) is fixedly mounted on the outer wall of one side of the support plate (403). The rotating shaft of the motor (405) and one end of the screw rod (404) are coaxially fixed.

6. The industrial boiler with waste heat recovery function according to claim 1, characterized in that: The installation pipe (301) is entirely made of heat-insulating material.

7. The industrial boiler with waste heat recovery function according to claim 5, characterized in that: The thread lead angle of the screw rod (404) is smaller than the equivalent friction angle.

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