Boiler flue gas waste heat circulation heat supply device

Abstract

The utility model provides a boiler flue gas waste heat circulation heat supply device which comprises a machine body, the bottom of the machine body is communicated with an ash discharge port, a filter screen is fixedly arranged on the inner wall of the machine body, a heat exchange coil pipe is arranged in the machine body, an exhaust pipe is arranged at the top of the machine body, and an air inlet pipe is arranged at the bottom of the machine body. And a cleaning mechanism is arranged in the machine body. The cleaning mechanism and the traction mechanism are arranged in the machine body, when the heat exchange process in the machine body is carried out, the cleaning mechanism can be driven to act under the driving of the traction mechanism, the filter screen is cleaned from the position above the filter screen, dust and impurities clamped in meshes can fall to the bottom of the inner cavity of the machine body under the action of gravity, and therefore the heat exchange efficiency is improved. The dust and impurities are prevented from influencing the normal filtering function of the filter screen, and the dredging mechanism is arranged, so that the dust and the impurities can be discharged to the outside through the dust discharging port in order, and the situation that the dust and the impurities block the dust discharging port is prevented.

Description

Technical Field

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

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy.

[0003] Announcement No. "CN220453693U" provides a boiler flue gas waste heat circulation heating device, including a heat exchange box; the heat exchange box is provided with an air inlet and an exhaust port; a heat exchange coil 1 is wound around the outside of the heat exchange box, a heat exchange coil 2 is provided inside the heat exchange box, and the outlet of the heat exchange coil 1 is connected to the medium inlet pipe of the heat exchange coil 2 through a conduit; a filter is fixed at the bottom of the heat exchange box. The device can exchange heat from the inside and outside of the heat exchange box at the same time, with high heat exchange efficiency and good effect, reducing heat loss and improving heat utilization. At the same time, the exhaust gas can be initially filtered during heat exchange to prevent a large amount of dust from sticking to the heat exchange coil 2 and affecting the heat exchange effect;

[0004] However, the above solution still has the following defects:

[0005] Since the high-temperature exhaust gas from the boiler enters the heat exchange box from the bottom, after a long period of use, some dust or impurities with a diameter slightly larger than the mesh will be stuck on the surface of the filter. As the high-temperature exhaust gas continues to pass from the bottom of the filter, these dust and impurities will get stuck more and more firmly, thereby affecting the normal filtration of the high-temperature exhaust gas by the filter. In addition, some other dust and impurities may block the ash discharge port when being discharged through the ash discharge port, resulting in the dust and impurities being unable to be discharged in time. Utility Model Content

[0006] The purpose of the utility model is to provide a boiler flue gas waste heat circulation heating device to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A boiler flue gas waste heat circulation heating device comprises a body, the bottom of the body is connected to an ash discharge port, a filter is fixedly arranged on the inner wall of the body, a heat exchange coil is arranged inside the body, an exhaust pipe is arranged on the top of the body, an air intake pipe is arranged at the bottom of the body, a cleaning mechanism is arranged inside the body, and a dredging mechanism is arranged inside the ash discharge port;

[0009] The cleaning mechanism includes a rotating shaft, a driving plate and a brush. The rotating shaft is rotatably arranged at the top of the inner cavity of the machine body through a traction mechanism. One end of the driving plate is fixed to the bottom end of the rotating shaft. The brush is installed at the bottom of the driving plate and contacts the filter.

[0010] Preferably, the traction mechanism includes a turbine, a shell and an air duct, the shell is fixed to the top of the machine body, one end of the rotating shaft extends into the shell, the turbine is installed on the top of the rotating shaft, the air duct is a U-shaped structure, and the two ends of the air duct are respectively connected to the inside of the shell and the inside of the exhaust pipe.

[0011] Preferably, the dredging mechanism includes a driving shaft, a base and a spiral blade, the spiral blade is fixed on the driving shaft, one end of the spiral blade and the driving shaft both extend into the ash discharge port, the base is arranged directly below the ash discharge port, and the bottom of the driving shaft is rotatably arranged on the base.

[0012] Preferably, a gas output pipe is fixedly connected to a side surface of the shell.

[0013] Preferably, the bottom of the machine body is arranged as a conical structure, and the machine body is arranged coaxially with the ash discharge port.

[0014] Preferably, a compressed air pipe is fixedly connected to the side of the exhaust pipe, and the compressed air pipe is connected to an external air source.

[0015] Preferably, an upper air collecting chamber, a lower air collecting chamber and a heat exchange chamber are provided inside the body, the heat exchange chamber is provided between the upper air collecting chamber and the lower air collecting chamber, the cross-sections of the upper air collecting chamber and the lower air collecting chamber are provided as a trapezoidal structure, and the heat exchange coil is provided inside the upper air collecting chamber, the lower air collecting chamber and the heat exchange chamber.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model uses the connecting pipe arranged horizontally and the infiltration pipe arranged vertically on the connecting pipe, so that the root system of the plant can be watered from the top and the bottom of the planting soil layer at the same time on rainy days, and the excess water in the planting soil layer can enter the filtering layer for filtration, and the filtered water can enter the second cavity through the filtering layer under the action of gravity, so as to realize the collection of purified water, and the excess rainwater in the first cavity can be temporarily stored inside for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the body of the utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the cleaning mechanism of the utility model;

[0021] Figure 4 It is a schematic diagram of the main structure of the dredging mechanism of the utility model.

[0022] In the figure: 1. machine body; 2. ash discharge port; 3. filter; 4. heat exchange coil; 5. exhaust pipe; 6. air inlet pipe; 7. rotating shaft; 8. drive plate; 9. brush; 10. turbine; 11. shell; 12. air guide pipe; 13. drive shaft; 14. base; 15. spiral blade; 16. gas output pipe; 17. compressed air pipe; 18. upper air collecting chamber; 19. lower air collecting chamber; 20. heat exchange chamber. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-4 , the utility model provides a technical solution:

[0025] A boiler flue gas waste heat circulation heating device comprises a body 1, the bottom of the body 1 is connected with an ash discharge port 2, a filter screen 3 is fixedly arranged on the inner wall of the body 1, a heat exchange coil 4 is arranged inside the body 1, an exhaust pipe 5 is arranged on the top of the body 1, an air intake pipe 6 is arranged at the bottom of the body 1, a cleaning mechanism is arranged inside the body 1, and a dredging mechanism is arranged inside the ash discharge port 2, the cleaning mechanism comprises a rotating shaft 7, a driving plate 8 and a brush 9, the rotating shaft 7 is rotatably arranged at the top of the inner cavity of the body 1 through a traction mechanism, one end of the driving plate 8 is fixed to the bottom end of the rotating shaft 7, the brush 9 is installed at the bottom of the driving plate 8 and contacts with the filter screen 3, the bottom of the body 1 is arranged as a conical structure, and the body 1 and the ash discharge port 2 are arranged coaxially.

[0026] See also Figure 1 and 2 The conical structure of the bottom of the body 1 is conducive to the gathering of dust and impurities. The cleaning mechanism is driven by a traction mechanism, and the power source of the traction mechanism is the high-temperature exhaust gas. Therefore, when the high-temperature exhaust gas is heat exchanged, the cleaning mechanism can be automatically driven to ensure the cleaning efficiency of the filter 3.

[0027] The traction mechanism includes a turbine 10, a shell 11 and an air duct 12. The shell 11 is fixed to the top of the body 1. One end of the rotating shaft 7 extends into the shell 11. The turbine 10 is installed on the top of the rotating shaft 7. The air duct 12 has a U-shaped structure, and the two ends of the air duct 12 are respectively connected to the inside of the shell 11 and the inside of the exhaust pipe 5. The side of the shell 11 is fixedly connected to a gas output pipe 16.

[0028] See also Figure 2 and 3 After the high-temperature exhaust gas after heat exchange enters the exhaust pipe 5, it can enter the inside of the shell 11 through the air guide pipe 12. In the shell 11, the high-temperature exhaust gas can drive the turbine 10 to rotate axially. At this time, the turbine 10 can drive the rotating shaft 7 to rotate synchronously. When the rotating shaft 7 rotates, it can drive the brush 9 to rotate unidirectionally with the center of the filter 3 as the center of the circle through the driving plate 8. During the rotation process, the brush 9 can push the dust impurities stuck in the mesh of the filter 3, so that they fall to the bottom of the inner cavity of the body 1 under the action of gravity, thereby achieving the cleaning of the filter 3.

[0029] The dredging mechanism includes a driving shaft 13, a base 14 and a spiral blade 15. The spiral blade 15 is fixed on the driving shaft 13. One end of the spiral blade 15 and the driving shaft 13 both extend into the ash discharge port 2. The base 14 is arranged directly below the ash discharge port 2, and the bottom of the driving shaft 13 is rotatably arranged on the base 14.

[0030] See also Figure 2 and 4 When in use, a motor connected to the drive shaft 13 can be added to the bottom of the base 14, and the drive shaft 13 is driven to rotate by the motor, so that the spiral blade 15 is driven to rotate inside the ash discharge port 2 by the drive shaft 13. Since the overall structure of the spiral blade 15 is spiral, it can stir the blocked dust and impurities when rotating, thereby clearing the blocked part, and the spiral blade 15 can send the dust and impurities through the ash discharge port 2 to the outside for discharge when rotating.

[0031] A compressed air pipe 17 is fixedly connected to the side of the exhaust pipe 5, and the compressed air pipe 17 is connected to an external air source.

[0032] See also Figure 1 and 2 The external air source can deliver high-pressure air into the exhaust pipe 5 through the compressed air pipe 17. Since there is high-temperature exhaust gas after heat exchange in the exhaust pipe 5, the high-temperature exhaust gas can enter the shell 11 through the air duct 12 after being pressurized, thereby increasing the rotation speed of the turbine 10, so that the turbine 10 drives the brush 9 to rotate through the rotating shaft 7 and the driving plate 8, thereby improving the cleaning efficiency of the brush 9 on the filter 3.

[0033] Embodiment 2:

[0034] In the above scheme, the high-temperature exhaust gas inside the body 1 can heat the medium in the heat exchange coil 4 to achieve the purpose of heat exchange. However, since the internal space of the body 1 is large, the utilization rate of the high-temperature exhaust gas close to the heat exchange coil 4 is high. Therefore, in this embodiment, an upper air collecting chamber 18, a lower air collecting chamber 19 and a heat exchange chamber 20 are arranged inside the body 1. The heat exchange chamber 20 is arranged between the upper air collecting chamber 18 and the lower air collecting chamber 19. The cross-sections of the upper air collecting chamber 18 and the lower air collecting chamber 19 are arranged as a trapezoidal structure, and the heat exchange coil 4 is arranged inside the upper air collecting chamber 18, the lower air collecting chamber 19 and the heat exchange chamber 20.

[0035] See also Figure 2 After passing through the filter 3, the high-temperature exhaust gas first enters the lower air collecting chamber 19, and then enters the heat exchange chamber 20 through the lower air collecting chamber 19. Since the inner wall of the heat exchange chamber 20 is closer to the heat exchange coil 4, the total amount of high-temperature exhaust gas away from the heat exchange coil 4 is reduced compared with the first embodiment. Finally, the high-temperature exhaust gas enters the upper air collecting chamber 18 from the heat exchange chamber 20, and finally enters the exhaust pipe 5 and is discharged from the body 1. The upper air collecting chamber 18 is a transition connecting the heat exchange chamber 20 and the body 1, which increases the flow rate of the high-temperature exhaust gas, so that it is easy to be discharged from the inside of the body 1, thereby increasing the utilization rate of the high-temperature exhaust gas.

[0036] Working principle: high-temperature exhaust gas enters the bottom of the body 1 through the air intake pipe 6. At this time, the high-temperature exhaust gas can be intercepted by the filter 3 when passing through the filter 3, and then the high-temperature exhaust gas contacts the heat exchange coil 4 after passing through the filter 3. The heat exchange ring inside the heat exchange coil 4 can be water or gas. The high-temperature exhaust gas after heat exchange can enter the air duct 12 through the air intake pipe 6, and enter the shell 11 through the air duct 12, and finally be discharged through the gas delivery pipe. During the process inside the shell 11, the high-temperature exhaust gas can drive the turbine 10 to rotate axially. At this time, the turbine 10 can drive the rotating shaft 7 to rotate synchronously. When the rotating shaft 7 rotates, it can drive the brush 9 to rotate unidirectionally with the center of the filter 3 as the center of the circle through the driving plate 8. During the rotation process, the brush 9 can push the dust and impurities stuck in the mesh of the filter 3, so that they fall to the bottom of the inner cavity of the body 1 under the action of gravity, thereby realizing the cleaning of the filter 3.

[0037] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas waste heat circulation heating device, comprising a body (1), characterized in that: The bottom of the machine body (1) is connected to an ash discharge port (2), a filter screen (3) is fixedly arranged on the inner wall of the machine body (1), a heat exchange coil (4) is arranged inside the machine body (1), an exhaust pipe (5) is arranged on the top of the machine body (1), an air intake pipe (6) is arranged at the bottom of the machine body (1), a cleaning mechanism is arranged inside the machine body (1), and a dredging mechanism is arranged inside the ash discharge port (2); The cleaning mechanism comprises a rotating shaft (7), a driving plate (8) and a brush (9); the rotating shaft (7) is rotatably arranged at the top of the inner cavity of the machine body (1) through a traction mechanism; one end of the driving plate (8) is fixed to the bottom end of the rotating shaft (7); and the brush (9) is installed at the bottom of the driving plate (8) and contacts the filter screen (3).

2. A boiler flue gas waste heat circulation heating device according to claim 1, characterized in that: The traction mechanism comprises a turbine (10), a shell (11) and an air duct (12); the shell (11) is fixed to the top of the machine body (1); one end of the rotating shaft (7) extends into the shell (11); the turbine (10) is mounted on the top of the rotating shaft (7); the air duct (12) is in a U-shaped structure; and both ends of the air duct (12) are respectively connected to the inside of the shell (11) and the inside of the exhaust pipe (5).

3. A boiler flue gas waste heat circulation heating device according to claim 2, characterized in that: The dredging mechanism comprises a driving shaft (13), a base (14) and a spiral blade (15); the spiral blade (15) is fixed on the driving shaft (13); one end of the spiral blade (15) and the driving shaft (13) both extend into the ash discharge port (2); the base (14) is arranged directly below the ash discharge port (2); and the bottom of the driving shaft (13) is rotatably arranged on the base (14).

4. A boiler flue gas waste heat circulation heating device according to claim 2, characterized in that: A gas output pipe (16) is fixedly connected to the side of the shell (11).

5. The boiler flue gas waste heat circulation heating device according to claim 1, characterized in that: The bottom of the machine body (1) is arranged as a conical structure, and the machine body (1) and the ash discharge port (2) are arranged coaxially.

6. The boiler flue gas waste heat circulation heating device according to claim 1, characterized in that: A compressed air pipe (17) is fixedly connected to the side of the exhaust pipe (5), and the compressed air pipe (17) is connected to an external air source.

7. The boiler flue gas waste heat circulation heating device according to claim 1, characterized in that: An upper air collecting chamber (18), a lower air collecting chamber (19) and a heat exchange chamber (20) are arranged inside the machine body (1); the heat exchange chamber (20) is arranged between the upper air collecting chamber (18) and the lower air collecting chamber (19); the cross-sections of the upper air collecting chamber (18) and the lower air collecting chamber (19) are arranged in a trapezoidal structure; and the heat exchange coil (4) is arranged inside the upper air collecting chamber (18), the lower air collecting chamber (19) and the heat exchange chamber (20).

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