Boiler energy-saving device

Abstract

The utility model discloses a boiler energy-saving device which comprises a waste heat recovery box, a cooling coil pipe is arranged on the inner side of the waste heat recovery box, a water inlet pipe and a water outlet pipe are arranged at the top and the bottom of the side face of the waste heat recovery box respectively, and the top end and the bottom end of the cooling coil pipe are connected with the water inlet pipe and the water outlet pipe respectively. The top end of the waste heat recovery box is provided with an opening, an access cover is arranged at the opening of the top end of the waste heat recovery box, and the access cover is detachably connected with the waste heat recovery box; a filter element is mounted at the air outlet of the access cover, and the filter element is detachably connected with the access cover. According to the utility model, the cooling coil is arranged in the waste heat recovery box, and desalted water of the boiler is injected into the cooling coil, so that heat exchange is carried out between the desalted water and flue gas, and the purpose of recovering waste heat in the flue gas is achieved; and meanwhile, the access cover can be disassembled and assembled according to use requirements, the whole energy-saving device can be conveniently overhauled, and a filter element is arranged at the air outlet of the access cover.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a boiler energy-saving device. Background Art

[0002] Boilers are widely used as important energy conversion equipment in industrial production and daily life. However, traditional boilers often have problems such as low energy utilization and high energy consumption during operation.

[0003] Currently, most boilers on the market use a single combustion method, resulting in limited combustion efficiency. A significant amount of heat energy is lost during the combustion process, leaving it unused. Furthermore, the boiler's exhaust gas temperature is high, carrying away a significant amount of heat and resulting in energy waste. Consequently, several mechanisms or devices have emerged on the market that recover waste heat from boiler exhaust ducts.

[0004] For example, the utility model patent with patent number CN201821618214.5 discloses a boiler waste heat recovery device, which includes a furnace body and a spiral circular tube, wherein the two ends of the spiral circular tube pass through the two side walls of the furnace body, an annular plate is welded on the furnace body, a water pool is welded in the middle of the annular plate, the lower end surface of the water pool is flush with the lower end surface of the annular plate, and a spiral square tube is welded on the water pool. The heat in the boiler can directly heat the water pool upwards, and at the same time, when the hot air in the boiler overflows outward through the spiral square tube, it has a large contact area with the water pool, ensuring that the heat in the hot air can be transferred to the water pool through the side walls of the spiral square tube, so that the water pool can maximize the use of the heat in the boiler; when the water temperature in the water pool reaches a certain temperature, the evaporant in the balloon will vaporize and expand the balloon, causing the liquid level in the water pool to rise to a height higher than the flat tube. According to the siphon principle, it can be obtained that the water in contact with the inner tube will all flow out from the outer tube for external use.

[0005] The boiler waste heat recovery device provided by the aforementioned patent recovers waste heat by heating water in a pool. However, this structure makes it difficult to perform preliminary filtration of dust in boiler flue gas, nor is it convenient to inspect and maintain the components within the waste heat recovery device. Utility Model Content

[0006] The purpose of the utility model is to provide a boiler energy-saving device, aiming to improve the problem that the existing boiler waste heat recovery device is inconvenient to filter the dust in the boiler flue gas, and it is also inconvenient to inspect and maintain the internal components of the waste heat recovery device.

[0007] The utility model is achieved in this way:

[0008] A boiler energy-saving device comprises a waste heat recovery box, a cooling coil is provided on the inner side of the waste heat recovery box, a water inlet pipe and a drain pipe are provided at the top and bottom of the side of the waste heat recovery box respectively, and the top and bottom ends of the cooling coil are connected to the water inlet pipe and the drain pipe respectively; the top end of the waste heat recovery box is opened, and an inspection cover is provided at the top opening of the waste heat recovery box, and the inspection cover is detachably connected to the waste heat recovery box; a filter element is installed at the air outlet of the inspection cover, and the filter element and the inspection cover are detachably connected.

[0009] Preferably, a mounting platform is provided at the edge of the top opening of the waste heat recovery box, and a plurality of mounting grooves are evenly arranged on the mounting platform; and control valves are provided on both the water inlet pipe and the drain pipe.

[0010] Preferably, a connecting pipe is provided at the bottom end of the waste heat recovery box, a connecting plate is provided at the bottom of the connecting pipe, and a plurality of connecting holes are evenly provided at the edge of the connecting plate.

[0011] Preferably, connecting pipes are provided at both ends of the top and bottom of the cooling coil, and the connecting pipes are rotatably connected to adapter caps, and the two adapter caps are respectively connected to the water inlet pipe and the drain pipe.

[0012] Preferably, the bottom of the inspection cover is provided with a mounting edge, and the mounting edge is aligned with the mounting slot and has mounting holes. The top of the inspection cover is provided with a smoke outlet pipe, and the top of the smoke outlet pipe is provided with a flange, and the edge of the flange is evenly provided with multiple flange holes.

[0013] Preferably, a connecting platform is provided at the top of the filter element, an adapter ring is provided at the top of the connecting platform, and the adapter ring is threadedly connected to the smoke outlet pipe.

[0014] Preferably, it also includes a water pump, the output end of the water pump is provided with a pump head, the side of the pump head is provided with an external pipe and an external cap, the two external pipes are respectively the water suction end and the drainage end of the water pump; and the drainage end of the water pump is connected to the water inlet pipe, and the water pump is provided with a fixed foot at one end attached to the side of the waste heat recovery box, and a plurality of fixing holes are evenly provided on the fixed foot.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model provides a cooling coil inside the waste heat recovery box, and injects boiler desalted water into the cooling coil to exchange heat with the flue gas, thereby achieving the purpose of recovering the waste heat in the flue gas.

[0017] 2. The inspection cover of the utility model can be disassembled and assembled according to the use requirements, which is convenient for the inspection of the entire energy-saving device. A filter element is provided at the air outlet of the inspection cover, which can filter the dust in the boiler and also block the speed of flue gas discharge to facilitate sufficient heat exchange between the flue gas and the desalted water of the boiler.

[0018] 3. The utility model provides a water pump on the side of the waste heat recovery box, through which the boiler desalted water can be pumped into the cooling coil, and the boiler desalted water inside the cooling coil realizes heat exchange with the heat in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the utility model as a whole;

[0020] Figure 2 This is a structural diagram of the waste heat recovery box of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the cooling coil of the utility model;

[0022] Figure 4 It is a structural diagram of the inspection cover of the utility model;

[0023] Figure 5 It is a structural diagram of the filter element of the utility model;

[0024] Figure 6 It is a structural diagram of the utility model water pump.

[0025] In the figure: 1. Waste heat recovery box; 11. Mounting platform; 12. Mounting slot; 13. Water inlet pipe; 14. Drain pipe; 15. Control valve; 16. Connecting pipe; 17. Connecting plate; 18. Connecting hole; 2. Cooling coil; 21. Connecting pipe; 22. Adapter cap; 3. Inspection cover; 31. Mounting edge; 32. Mounting hole; 33. Smoke outlet pipe; 34. Flange; 35. Flange hole; 4. Filter element; 41. Connecting platform; 42. Adapter ring; 5. Water pump; 51. Pump head; 52. External pipe; 53. External cap; 54. Fixing foot; 55. Fixing hole. DETAILED DESCRIPTION

[0026] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, a boiler energy-saving device includes a waste heat recovery box 1, a cooling coil 2 is provided inside the waste heat recovery box 1, and a water inlet pipe 13 and a drain pipe 14 are provided at the top and bottom of the side of the waste heat recovery box 1, respectively. The top and bottom ends of the cooling coil 2 are connected to the water inlet pipe 13 and the drain pipe 14, respectively. This structure facilitates the introduction of boiler desalted water into the cooling coil 2, and the boiler flue gas will exchange heat with the boiler desalted water when passing through the waste heat recovery box 1, thereby achieving the purpose of heat recovery. At the same time, the cooling coil 2 is removable, which is convenient for inspection and maintenance. The waste heat recovery box 1 is provided with an opening at the top, and an inspection cover 3 is provided at the top opening of the waste heat recovery box 1. The inspection cover 3 is detachably connected to the waste heat recovery box 1. The inspection cover 3 is convenient for opening the top opening of the waste heat recovery box 1, which facilitates the repair and maintenance of the internal components of the waste heat recovery box 1. A filter element 4 is installed at the air outlet of the inspection cover 3, and the filter element 4 is detachably connected to the inspection cover 3. The filter element 4 facilitates the preliminary filtration of the boiler flue gas.

[0030] like Figure 2 As shown, a mounting platform 11 is provided on the edge of the top opening of the waste heat recovery box 1, and a plurality of mounting grooves 12 are evenly provided on the mounting platform 11; the cooperation between the mounting platform 11 and the mounting grooves 12 facilitates the connection between the inspection cover 3 and the waste heat recovery box 1, and facilitates the disassembly and use of the inspection cover 3. A control valve 15 is provided on both the water inlet pipe 13 and the drain pipe 14, and the control valve 15 facilitates the control of the opening and closing of the water inlet pipe 13 and the drain pipe 14 and the water flow rate. A connecting pipe 16 is provided at the bottom end of the waste heat recovery box 1, and a connecting plate 17 is provided at the bottom of the connecting pipe 16, and a plurality of connecting holes 18 are evenly provided on the edge of the connecting plate 17; the connecting pipe 16 cooperates with the connecting plate 17 and the connecting holes 18 to facilitate the connection of the waste heat recovery box 1 to the flue of the boiler.

[0031] like Figure 3 As shown, connecting pipes 21 are provided at both ends of the top and bottom of the cooling coil 2, and the connecting pipes 21 are rotatably connected to adapter caps 22, and the two adapter caps 22 are respectively connected to the water inlet pipe 13 and the drain pipe 14; this structure is convenient for the use of the cooling coil 2 in conjunction with the water inlet pipe 13 and the drain pipe 14, and is also convenient for the disassembly, assembly and maintenance of the cooling coil 2.

[0032] like Figure 4As shown, the bottom of the inspection cover 3 is provided with a mounting edge 31. The mounting edge 31 is aligned with the mounting slot 12 and is provided with a mounting hole 32. The mounting edge 31 and the mounting hole 32 facilitate the use of bolts to fix the inspection cover 3 to the top opening of the waste heat recovery tank 1, making it easy to open the inspection cover 3 and repair the interior of the waste heat recovery tank 1 during maintenance. The top of the inspection cover 3 is provided with a smoke outlet pipe 33, and the top of the smoke outlet pipe 33 is provided with a flange 34. The edge of the flange 34 is evenly provided with multiple flange holes 35. The smoke outlet pipe 33 cooperates with the flange 34 and the flange holes 35 to facilitate the connection of the inspection cover 3 to the exhaust pipe.

[0033] like Figure 5 As shown, a connecting platform 41 is provided at the top of the filter element 4, and an adapter ring 42 is provided at the top of the connecting platform 41. The adapter ring 42 is threadedly connected to the smoke outlet pipe 33; the cooperation between the connecting platform 41 and the adapter ring 42 facilitates the threaded connection between the filter element 4 and the inspection cover 3, and is convenient for the disassembly and use of the filter element 4.

[0034] Example 2

[0035] like Figure 1 and Figure 2 As shown, the difference between this embodiment and embodiment 1 is that, in order to smoothly pump the boiler desalted water into the cooling coil 2, it also includes a water pump 5, the output end of the water pump 5 is provided with a pump head 51, the side of the pump head 51 is provided with an external pipe 52 and an external cap 53, the two external pipes 52 are respectively the water suction end and the drainage end of the water pump 5; and the drainage end of the water pump 5 is connected to the water inlet pipe 13. This structure is convenient for connecting the water pump to the boiler desalted water extraction pipeline and pumping the boiler desalted water into the cooling coil 2. The water pump 5 is attached to the side of the waste heat recovery box 1 at one end with a fixing foot 54, and a plurality of fixing holes 55 are evenly arranged on the fixing foot 54; the cooperation of the fixing foot 54 and the fixing hole 55 is convenient for fixing the position of the water pump 5 by bolts, thereby ensuring that the water pump 5 is sufficiently stable.

[0036] Working principle: When in use, the waste heat recovery box 1 is installed on the flue of the boiler, and the cooling coil 2 is connected to the water inlet pipe 13 and the drain pipe 14, and then the inspection cover 3 and the filter element 4 are installed inside the waste heat recovery box 1; the boiler desalted water to be heated is injected into the cooling coil 2 through the water inlet pipe 13, and the boiler flue gas will exchange heat with the boiler desalted water inside the cooling coil 2 when passing through the waste heat recovery box 1, and the boiler flue gas will be filtered by the filter element 4, and the filter element 4 can also slow down the outflow rate of the flue gas, so that sufficient heat exchange can be carried out between the flue gas and the boiler desalted water. Compared with the prior art, the present application provides a cooling coil 2 inside the waste heat recovery box 1, and injects boiler desalted water into the cooling coil 2, thereby achieving heat exchange with the flue gas, thereby achieving the purpose of recovering the waste heat in the flue gas; at the same time, the inspection cover 3 can be disassembled and assembled according to usage requirements, which is convenient for the inspection of the entire energy-saving device, and a filter element 4 is provided at the air outlet of the inspection cover 3, through which the dust in the boiler can be filtered and treated, and the speed of flue gas discharge can also be blocked, so as to facilitate sufficient heat exchange between the flue gas and boiler desalted water.

[0037] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A boiler energy-saving device, comprising a waste heat recovery box (1), characterized in that: A cooling coil (2) is provided on the inner side of the waste heat recovery box (1), and a water inlet pipe (13) and a drain pipe (14) are provided on the top and bottom of the side of the waste heat recovery box (1), respectively. The top and bottom ends of the cooling coil (2) are connected to the water inlet pipe (13) and the drain pipe (14), respectively; the top end of the waste heat recovery box (1) is provided with an opening, and an inspection cover (3) is provided at the top end opening of the waste heat recovery box (1), and the inspection cover (3) and the waste heat recovery box (1) are detachably connected; a filter element (4) is installed at the air outlet of the inspection cover (3), and the filter element (4) and the inspection cover (3) are detachably connected.

2. A boiler energy-saving device according to claim 1, characterized in that: The top opening edge of the waste heat recovery box (1) is provided with a mounting platform (11), and a plurality of mounting grooves (12) are evenly arranged on the mounting platform (11); and control valves (15) are provided on both the water inlet pipe (13) and the drain pipe (14).

3. A boiler energy-saving device according to claim 2, characterized in that: The waste heat recovery box (1) is provided with a connecting pipe (16) at the bottom end, a connecting plate (17) is provided at the bottom of the connecting pipe (16), and a plurality of connecting holes (18) are evenly arranged on the edge of the connecting plate (17).

4. A boiler energy-saving device according to claim 1, characterized in that: The top and bottom ends of the cooling coil (2) are both provided with connecting pipes (21), the connecting pipes (21) are rotatably connected to adapter caps (22), and the two adapter caps (22) are respectively connected to the water inlet pipe (13) and the drain pipe (14).

5. A boiler energy-saving device according to claim 2, characterized in that: The inspection cover (3) is provided with a mounting edge (31) at the bottom, and a mounting hole (32) is provided at a position where the mounting edge (31) is aligned with the mounting groove (12). The inspection cover (3) is provided with a smoke outlet pipe (33) at the top, and a flange (34) is provided at the top end of the smoke outlet pipe (33). The edge of the flange (34) is evenly provided with multiple flange holes (35).

6. A boiler energy-saving device according to claim 5, characterized in that: A connecting platform (41) is provided at the top of the filter element (4), an adapter ring (42) is provided at the top of the connecting platform (41), and the adapter ring (42) is threadedly connected to the smoke outlet pipe (33).

7. A boiler energy-saving device according to any one of claims 1 to 6, characterized in that: The invention also includes a water pump (5), wherein the output end of the water pump (5) is provided with a pump head (51), and the side of the pump head (51) is provided with an external pipe (52) and an external cap (53), and the two external pipes (52) are respectively the water suction end and the drainage end of the water pump (5); and the drainage end of the water pump (5) is connected to the water inlet pipe (13), and one end of the water pump (5) attached to the side of the waste heat recovery box (1) is provided with a fixed foot (54), and a plurality of fixing holes (55) are evenly provided on the fixed foot (54).

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