Boiler flue gas waste heat recycling device

Abstract

The invention belongs to the technical field of waste heat recycling, and particularly relates to a boiler flue gas waste heat recycling device which comprises a barrel, a first connecting pipe is fixed to the center of the bottom of the barrel in a penetrating mode, the top end of the first connecting pipe is in threaded connection with a copper spiral pipe, and the top end of the barrel is in threaded connection with a barrel cover. A second connecting pipe is fixed to the center position of the cylinder cover in a penetrating mode. By arranging the barrel body, the first connecting pipe, the copper spiral pipe, the barrel cover and the second connecting pipe, the top end of the first connecting pipe is in threaded connection with the bottom end of the copper spiral pipe, and the barrel cover is in threaded connection with the barrel body, when dirt on the inner wall of the copper spiral pipe is thick, and the heat conduction performance is affected, the barrel cover can be detached from the barrel body firstly, and then the second connecting pipe is connected with the barrel cover; and then the copper spiral pipe is detached from the first connecting pipe, and then a new copper spiral pipe is arranged, so that the whole detaching and installing process is simple, and a worker can conveniently overhaul or replace the copper spiral pipe.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery and utilization, and in particular to a boiler flue gas waste heat recovery and utilization device. Background Art

[0002] The flue gas generated by boiler combustion contains a large amount of heat. In order to avoid energy waste, the heat energy in the flue gas is usually recycled. At present, the high-temperature flue gas is generally passed into a spiral coil, which is set in a cylinder filled with water. The high-temperature flue gas will heat the spiral coil, and the spiral coil will heat the water, thereby achieving the purpose of recovering the heat of the flue gas. The flue gas generated by boiler combustion contains a lot of particulate matter, which is easy to adhere to the inner wall of the spiral coil. After a long time, the dirt on the inner wall of the spiral coil will become thicker, which will cause the thermal conductivity to deteriorate, thereby reducing the recovery rate of the flue gas heat energy. Therefore, the spiral coil needs to be regularly inspected or replaced, but the spiral coil of this flue gas heat recovery device is not easy to disassemble and assemble, which makes the inspection or replacement operation more troublesome. Therefore, we propose a boiler flue gas waste heat recovery device to solve the above problems. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a boiler flue gas waste heat recovery and utilization device, which solves the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A boiler flue gas waste heat recovery and utilization device comprises a cylinder, a first connecting pipe is fixedly passed through at the center position of the bottom of the cylinder, a copper spiral tube is threadedly connected to the top end of the first connecting pipe, a cylinder cover is threadedly connected to the top end of the cylinder, a second connecting pipe is fixedly passed through at the center position of the cylinder cover, the top end of the copper spiral tube is embedded and fit inside the bottom end of the second connecting pipe, a water supply pipe is fixedly passed through at the top end of the cylinder cover, the top end of the water supply pipe is threadedly connected to the pipe cover, a drain pipe is fixedly passed through the bottom of the cylinder, and a valve is installed on the drain pipe.

[0008] Furthermore, a mounting seat is fixedly mounted on the surface of the cylinder, supporting legs are fixed to the four corners of the bottom of the mounting seat, and universal self-locking wheels are installed at the bottom of the supporting legs.

[0009] Furthermore, an inner wall at the top end of the first connecting tube is provided with an internal thread, and an outer thread matching the inner thread at the top end of the first connecting tube is provided on the bottom end surface of the copper spiral tube.

[0010] Furthermore, a first flange is fixed to the bottom end of the first connecting pipe, and a second flange is fixed to the top end of the second connecting pipe.

[0011] Furthermore, the top surface of the water filling pipe is provided with an external thread, and the inner wall of the pipe cover is provided with an internal thread matched with the external thread at the top of the water filling pipe.

[0012] Furthermore, two U-shaped handles are symmetrically fixed on the top of the cylinder cover.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present invention provides a boiler flue gas waste heat recovery and utilization device, which has the following beneficial effects:

[0015] The present invention provides a cylinder body, a first connecting tube, a copper spiral tube, a cylinder cover and a second connecting tube, and the top end of the first connecting tube is threadedly connected to the bottom end of the copper spiral tube, and the cylinder cover is threadedly connected to the cylinder body. When the dirt on the inner wall of the copper spiral tube is thick and affects the thermal conductivity, the cylinder cover can be removed from the cylinder body first, and then the copper spiral tube can be removed from the first connecting tube, and then replaced with a new copper spiral tube. The entire disassembly and assembly process is relatively simple, so it is convenient for staff to inspect or replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0018] Figure 3 It is a schematic diagram of the cylinder structure of the present invention;

[0019] Figure 4 This is a schematic structural diagram of the cylinder cover of the present invention from a first viewing angle;

[0020] Figure 5 This is a schematic structural diagram of the cylinder cover of the present invention from a second viewing angle;

[0021] Figure 6 This is a schematic diagram of the structure of the copper spiral tube of the present invention;

[0022] Figure 7 This is a schematic diagram of the first connecting pipe structure of the present invention.

[0023] In the figure: 1. cylinder body; 2. first connecting pipe; 3. copper spiral pipe; 4. cylinder cover; 5. second connecting pipe; 6. water supply pipe; 7. pipe cover; 8. drain pipe; 9. valve; 10. mounting seat; 11. supporting leg; 12. universal self-locking wheel; 13. first flange; 14. second flange; 15. U-shaped handle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example

[0026] like Figure 1-7 As shown, a boiler flue gas waste heat recovery and utilization device proposed in one embodiment of the present invention includes a cylinder 1, a first connecting pipe 2 is fixed through it at the center position of the bottom of the cylinder 1, a copper spiral tube 3 is threadedly connected to the top of the first connecting tube 2, an internal thread is provided on the inner wall of the top of the first connecting tube 2, and an external thread matching the internal thread of the top of the first connecting tube 2 is provided on the bottom surface of the copper spiral tube 3, a cylinder cover 4 is threadedly connected to the top of the cylinder 1, a second connecting pipe 5 is fixed through it at the center position of the cylinder cover 4, the top of the copper spiral tube 3 is embedded and fit inside the bottom end of the second connecting tube 5, a water adding pipe 6 is fixed through it at the top of the cylinder cover 4, a pipe cover 7 is threadedly connected to the top of the water adding pipe 6, an external thread is provided on the top surface of the water adding pipe 6, and an internal thread matching the external thread of the top of the water adding pipe 6 is provided on the inner wall of the pipe cover 7, a drain pipe 8 is fixed through it at the bottom of the cylinder 1, and a valve 9 is installed on the drain pipe 8.

[0027] When in use, the flue gas generated by the combustion of the boiler is transported to the first connecting pipe 2 through a conveying pipe. The high-temperature flue gas will pass through the copper spiral tube 3, thereby heating the copper spiral tube 3. It should be noted that water is contained in the cylinder 1, and the copper spiral tube 3 will transfer heat to the water body, thereby heating the water body, so that the heat in the flue gas can be recovered, and the heated water body can be used for bathing or other purposes. It should be further noted that the cylinder 1 is made of heat-insulating material, and the top of the second connecting pipe 5 is connected to the device for subsequent treatment of the flue gas through a pipeline. The cooled flue gas will be discharged from the second The hot water is transported to the device for subsequent treatment of the flue gas through the connecting pipe 5. When hot water is needed, open the valve 9 and the hot water in the cylinder 1 will flow out from the drain pipe 8. When the dirt on the inner wall of the copper spiral tube 3 is thick and affects the thermal conductivity, it can be replaced. The disassembly operation process is to first remove the connecting pipe between the top of the second connecting pipe 5 and the flue gas subsequent treatment device, then unscrew the cylinder cover 4, and then unscrew the bottom end of the copper spiral tube 3 from the first connecting pipe 2. In this way, the copper spiral tube 3 can be removed. The operation process of how to install a new copper spiral tube 3 will not be repeated here.

[0028] like Figure 1 and Figure 2 As shown, in this embodiment, a mounting seat 10 is fixedly mounted on the surface of the cylinder body 1, and supporting legs 11 are fixed to the four corners of the bottom of the mounting seat 10, and universal self-locking wheels 12 are installed at the bottom of the supporting legs 11 to facilitate the movement of the device; a first flange 13 is fixed to the bottom end of the first connecting pipe 2 to facilitate the connection with the flue gas conveying pipeline generated during boiler combustion, and a second flange 14 is fixed to the top end of the second connecting pipe 5 to facilitate the connection with the pipeline of the flue gas subsequent treatment device; two U-shaped handles 15 are symmetrically fixed to the top of the cylinder cover 4 to facilitate the staff to turn and lift the cylinder cover 4.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boiler flue gas waste heat recovery device, comprising a cylinder (1), characterized in that: A first connecting pipe (2) is fixedly passed through the center position of the bottom of the cylinder (1), a copper spiral tube (3) is threadedly connected to the top of the first connecting pipe (2), a cylinder cover (4) is threadedly connected to the top of the cylinder (1), a second connecting pipe (5) is fixedly passed through the center position of the cylinder cover (4), the top of the copper spiral tube (3) is embedded and fitted inside the bottom end of the second connecting pipe (5), a water supply pipe (6) is fixedly passed through the top of the cylinder cover (4), a pipe cover (7) is threadedly connected to the top of the water supply pipe (6), a drain pipe (8) is fixedly passed through the bottom of the cylinder (1), and a valve (9) is installed on the drain pipe (8).

2. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: A mounting seat (10) is fixedly sleeved on the surface of the cylinder (1), support legs (11) are fixed at the four corners of the bottom of the mounting seat (10), and universal self-locking wheels (12) are installed at the bottom of the support legs (11).

3. The boiler flue gas waste heat recovery device according to claim 1 is characterized in that: The inner wall of the top end of the first connecting tube (2) is provided with an internal thread, and the bottom end surface of the copper spiral tube (3) is provided with an external thread matching the internal thread of the top end of the first connecting tube (2).

4. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: A first flange (13) is fixed to the bottom end of the first connecting pipe (2), and a second flange (14) is fixed to the top end of the second connecting pipe (5).

5. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: The top surface of the water-filling pipe (6) is provided with an external thread, and the inner wall of the pipe cover (7) is provided with an internal thread matching the external thread at the top of the water-filling pipe (6).

6. The boiler flue gas waste heat recovery device according to claim 1, characterized in that: Two U-shaped handles (15) are symmetrically fixed on the top of the cylinder cover (4).

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