Waste heat recovery device for heating furnace

Abstract

The utility model provides a waste heat recovery device for a heating furnace, which relates to the field of waste heat recovery and comprises a frame provided with a baffle, a fan arranged on the frame and used for sucking smoke, and a heat exchanger used for recovering residual heat in the smoke, a filter element frame is further arranged in the frame, and the filter element frame is provided with a plurality of filter elements; the filter element comprises a square frame and a filter paper frame arranged in the square frame, the two opposite ends of the filter paper frame are fixedly combined with the square frame, and gaps are formed between the other two opposite ends of the filter paper frame and the interior of the square frame; the filter element further comprises filter paper which sleeves the filter paper frame from the gap, so that two ports of the filter paper frame are coated; after the two opposite surfaces of the filter paper are filtered and saturated, the two unused surfaces in the filter paper can be overturned to the two ports of the filter paper frame, so that the maintenance process of personnel can be simplified, the original operation of replacing the filter element is replaced by the overturning operation, and the service life of the filter element is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of waste heat recovery, in particular to a waste heat recovery device for a heating furnace. Background Art

[0002] Figure 1 The waste heat recovery device shown can recover heat in the flue gas. According to user feedback, the waste heat recovery device has shortcomings: first, the maintenance period of the flue gas purification system is short, and the filter element needs to be replaced frequently; second, the filter element is modularly designed, and replacing the filter element requires not only replacing the filter paper, but also replacing the filter box (alloy material) used to fix the filter paper. The maintenance cost is high and it is in urgent need of improvement and upgrading. Utility Model Content

[0003] The purpose of the utility model is to provide a waste heat recovery device for a heating furnace to solve the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A waste heat recovery device for a heating furnace comprises a frame equipped with a baffle, a fan arranged on the frame for extracting smoke, and a heat exchanger for recovering residual heat in the smoke, and a filter element frame is provided in the frame, and the filter element frame is equipped with a plurality of filter elements;

[0006] The filter element comprises a square frame and a filter paper holder arranged in the square frame, wherein two opposite ends of the filter paper holder are fixedly connected to the square frame, and the other two opposite ends of the filter paper holder form a gap in the square frame;

[0007] The filter element also includes filter paper, which is wrapped around the filter paper holder from the gap so that two ports of the filter paper holder are covered;

[0008] The two opposite sides of the filter paper cover the two ports of the filter paper holder, and the remaining two sides of the filter paper can replace the sides of the filter paper previously covering the two ports of the filter paper holder after the filter paper rotates relative to the filter paper holder.

[0009] Preferably, the frame is detachable.

[0010] Preferably, the square frame comprises a first frame plate and a second frame plate, wherein the first frame plate has a notch and the second frame plate covers the notch.

[0011] Preferably, the filter paper holder is fixedly connected to the first frame plate via bolts, and the second frame plate is fixedly connected to the filter paper holder via bolts.

[0012] Preferably, two ports opposite to the filter paper are blocked by the first frame plate and the second frame plate.

[0013] Preferably, the filter paper holder is a square frame.

[0014] Preferably, the heat exchanger is equipped with a first tube, a second tube and a third tube, wherein the second tube introduces heat exchange medium, the first tube discharges the heat exchange medium, and the third tube guides condensed water in the heat exchanger to be discharged outward.

[0015] Preferably, the fan is equipped with a motor.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the utility model, after the two opposite sides of the filter paper are saturated with filtration, the two unused sides of the filter paper can be flipped to the two ports of the filter paper holder. This design can simplify the maintenance process, replace the operation of replacing the filter element with the above-mentioned flipping operation, and extend the service life of the filter element.

[0018] 2. In the present invention, the structure for fixing the filter paper is detachable. Thus, when the filter paper cannot be used, the filter paper can be installed by disassembling the combination of the first frame plate, the second frame plate and the filter paper holder, or the first frame plate, the second frame plate and the filter paper holder can be combined to fix the filter paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an existing waste heat recovery device for a heating furnace;

[0020] Figure 2 This is a structural schematic diagram of a waste heat recovery device for a heating furnace proposed by the utility model;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure after the baffle is covered;

[0022] Figure 4 for Figure 2 Side view of

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

[0024] Figure 6 for Figure 5 A split diagram of the filter element shown;

[0025] Figure 7 for Figure 6 A further exploded view of the filter element shown;

[0026] Figure numerals: 1. base; 2. frame; 3. filter element holder; 4. filter element; 41. first frame plate; 42. second frame plate; 43. filter paper; 44. filter paper holder; 5. heat exchanger; 6. fan; 7. first tube; 8. second tube; 9. third tube; 10. first baffle; 11. second baffle; 12. third baffle; 13. first door leaf; 14. second door leaf; 15. motor. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0028] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] In this embodiment, a waste heat recovery device for a heating furnace is proposed. Figure 2-Figure 7 The waste heat recovery device for a heating furnace includes a frame 2 and a base 1 serving as a load-bearing structure at the bottom of the frame 2.

[0031] See also Figure 2 and Figure 3 , the frame 2 is equipped with structures such as baffles and door leaves. Specifically, the side direction of the frame 2 is covered by the first baffle 10. Opposite to the first baffle 10 is the third baffle 12 covering the other side of the frame 2. Of course, the third baffle 12 does not cover the entire frame 2. The frame 2 also has installation positions for the first door leaf 13 and the second door leaf 14 and the range that the door leaf can cover.

[0032] See also Figure 2 and Figure 4 The frame 2 contains a fan 6, a heat exchanger 5, and a filter element holder 3 for fixing a plurality of filter elements 4, wherein: Figure 4 The motor 15 shown drives the fan 6 to introduce smoke into the frame 2 , and the smoke is filtered by the filter element 4 after heat exchange in the heat exchanger 5 .

[0033] See also Figure 5-Figure 7 This embodiment provides a newly designed filter element 4, which includes a square frame and a filter paper holder 44 (the filter paper holder 44 is a square frame) disposed in the square frame.

[0034] Please continue reading Figure 5-Figure 7 The two opposite ends of the filter paper holder 44 are fixedly connected to the frame, and the other two opposite ends of the filter paper holder 44 form a gap in the frame. The filter element 4 also includes filter paper 43, and the filter paper 43 is wrapped around the filter paper holder 44 from the gap, so that the two ports of the filter paper holder 44 are covered.

[0035] To further illustrate, two opposite sides of the filter paper 43 cover the two ports of the filter paper holder 44 , and the remaining two sides of the filter paper 43 can replace the sides of the filter paper 43 that previously covered the two ports of the filter paper holder 44 after the filter paper 43 rotates relative to the filter paper holder 44 .

[0036] To further illustrate, the frame is detachable. Specifically, the frame includes a first frame plate 41 and a second frame plate 42. Figure 6 and Figure 7 As shown, the first frame plate 41 has a gap, and the second frame plate 42 covers the gap; it should be noted that the frame disassembly is limited to the filter paper holder 44 being fixedly combined with the first frame plate 41 by bolts, and the second frame plate 42 being fixedly combined with the filter paper holder 44 by bolts.

[0037] The above description can solve the two technical problems raised in the background technology:

[0038] First, after the two opposite sides of the filter paper 43 are saturated with filtration, the two unused sides of the filter paper 43 can be flipped to the two ports of the filter paper holder 44. This design can simplify the maintenance process and replace the operation that originally required the replacement of the filter element with the above-mentioned flipping operation, thereby extending the service life of the filter element 4.

[0039] Second, the structure for fixing the filter paper 43 is detachable. In this way, when the filter paper 43 cannot be used, the filter paper 43 can be installed by disassembling the combination of the first frame plate 41, the second frame plate 42 and the filter paper holder 44, or the first frame plate 41, the second frame plate 42 and the filter paper holder 44 can be combined to fix the filter paper 43.

[0040] The following contents need to be explained in this embodiment:

[0041] First, two opposite ports of the filter paper 43 are blocked by the first frame plate 41 and the second frame plate 42 .

[0042] Second, the frame 2 is provided with a second baffle 11 on one side of the filter element frame 3, and the frame 2 is provided with a fan baffle (not marked in the figure) on one side of the fan 6, and the fan baffle is limited to the fan air inlet and connected to the smoke duct.

[0043] Third, the heat exchanger 5 is equipped with a first tube 7, a second tube 8 and a third tube 9, wherein the second tube 8 introduces heat exchange medium, the first tube 7 discharges heat exchange medium, and the third tube 9 guides condensed water in the heat exchanger 5 to be discharged outward.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A waste heat recovery device for a heating furnace, comprising a frame equipped with a baffle, a fan arranged on the frame for extracting flue gas, and a heat exchanger for recovering residual heat in the flue gas, characterized in that: There is also a filter element holder in the frame, which is equipped with several filter elements; The filter element comprises a square frame and a filter paper holder arranged in the square frame, wherein two opposite ends of the filter paper holder are fixedly connected to the square frame, and the other two opposite ends of the filter paper holder form a gap in the square frame; The filter element also includes filter paper, which traps the filter paper frame from the gap so that the two ports of the filter paper frame are covered; the two opposite sides of the filter paper cover the two ports of the filter paper frame, and the remaining two sides of the filter paper can replace the sides of the filter paper that previously covered the two ports of the filter paper frame after the filter paper rotates relative to the filter paper frame.

2. The waste heat recovery device for a heating furnace according to claim 1, characterized in that: The frame is removable.

3. A waste heat recovery device for a heating furnace according to claim 2, characterized in that: The square frame includes a first frame plate and a second frame plate, wherein the first frame plate has a notch and the second frame plate covers the notch.

4. The waste heat recovery device for a heating furnace according to claim 3, characterized in that: The filter paper holder is fixedly connected to the first frame plate via bolts, and the second frame plate is fixedly connected to the filter paper holder via bolts.

5. The waste heat recovery device for a heating furnace according to claim 4, characterized in that: Two ports opposite to the filter paper are blocked by the first frame plate and the second frame plate.

6. The waste heat recovery device for a heating furnace according to claim 1, characterized in that: The filter paper holder is a square frame.

7. The waste heat recovery device for a heating furnace according to claim 1, characterized in that: The heat exchanger is equipped with a first tube, a second tube and a third tube, wherein the second tube introduces a heat exchange medium, the first tube discharges the heat exchange medium, and the third tube guides condensed water in the heat exchanger to be discharged outward.

8. The waste heat recovery device for a heating furnace according to claim 1, characterized in that: The fan is equipped with a motor.

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