Efficient heat exchange horizontal flue structure suitable for horizontal garbage incinerator

Abstract

The utility model discloses an efficient heat exchange horizontal flue structure suitable for a horizontal garbage incinerator, which relates to the technical field of heat exchange structures of horizontal garbage incinerators and comprises a flue, an ash bucket is connected below the flue, and the inclination angle of one side of the ash bucket is larger than that of the other side of the ash bucket. The flue and the ash bucket are internally provided with a series tube panel for cooling flue gas, the series tube panel comprises a first series tube panel part and a second series tube panel part, the first series tube panel part is arranged on the side, with a smaller inclination angle, of the ash bucket, and the second series tube panel part is arranged on the side, with a larger inclination angle, of the ash bucket; the tube panel lengths of the second series tube panel part are sequentially decreased, and an ash dredging channel is reserved between the second series tube panel part and the side, with the larger inclination angle, of the ash bucket. The heat transfer effect of the heat exchange tube panel can be optimized, and the material cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange structures of horizontal garbage incinerators, in particular to a high-efficiency heat exchange horizontal flue structure suitable for horizontal garbage incinerators. Background Art

[0002] In horizontal waste incinerators, the horizontal flue usually uses horizontal grouping of heat exchange tube panels with similar hanging heights, such as Figure 1 As shown, the ash hopper is arranged at the bottom, but there are problems of shape mismatch and large gap between the flue and the heat exchange tube screen. The diffusion change of the flue cross section leads to a decrease in the flue gas flow rate, low heat transfer capacity of the heat exchange tube screen, and a large amount of metal consumables. As the heat exchange on the flue gas journey, the lower the flow rate, the worse the heat exchange, and the worse the utilization of the heat exchange surface. Based on this, a high-efficiency heat exchange horizontal flue structure suitable for horizontal waste incinerators is designed to optimize the heat transfer effect of the heat exchange tube screen and reduce material costs. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator, which adopts a large-angle inclined ash hopper, and the flue gas flow cross-sectional area of ​​the second series tube panel part decreases successively, leaving an ash discharge channel of a certain height between the side with a larger inclination angle with the ash hopper, thereby increasing the average flow velocity of the flue gas flowing through the tube panel and improving the heat transfer capacity of the flue gas to the series tube panel.

[0004] The purpose of the utility model is achieved through the following technical solutions: a high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator, the high-efficiency heat exchange horizontal flue structure comprising a flue, an ash hopper is connected below the flue, the inclination angle of one side of the ash hopper is larger than the inclination angle of the other side, series tube screens for cooling flue gas are arranged inside the flue and the ash hopper, and the shape of the series tube screens is arranged in accordance with the flue, the series tube screens comprise a first series tube screen part and a second series tube screen part, the first series tube screen part is arranged on the side of the ash hopper with a smaller inclination angle, the second series tube screen part is arranged on the side of the ash hopper with a larger inclination angle, the tube screen lengths of the second series tube screen part decrease successively, and an ash scavenging channel is left between the side of the ash hopper with a larger inclination angle to facilitate dust to slide into the bottom of the ash hopper.

[0005] The ash hopper includes a first ash hopper and a second ash hopper, and the first ash hopper and the second ash hopper are respectively arranged on both sides below the flue.

[0006] The first series tube panel part includes a first series tube panel and a fourth series tube panel. The first series tube panel is arranged on the side of the first ash hopper with a smaller inclination angle, and the fourth series tube panel is arranged on the side of the second ash hopper with a smaller inclination angle.

[0007] The second series tube panel part includes a second series tube panel, a third series tube panel, a fifth series tube panel and a sixth series tube panel. The second series tube panel and the third series tube panel are arranged on the side of the first ash hopper with a larger inclination angle, and the tube panel lengths of the second series tube panel and the third series tube panel decrease successively. The fifth series tube panel and the sixth series tube panel are arranged on the side of the second ash hopper with a larger inclination angle, and the tube panel lengths of the fifth series tube panel and the sixth series tube panel decrease successively.

[0008] The tube panel lengths of the second series tube panel and the third series tube panel decrease from left to right, and the tube panel lengths of the fifth series tube panel and the sixth series tube panel decrease from left to right.

[0009] Cold water circulates inside the series tube panels.

[0010] The beneficial effects of the utility model are:

[0011] 1. The utility model has stronger heat transfer capacity, and the flue gas flow cross section gradually decreases with the flue gas cooling process. When the flue gas temperature decreases and the flue gas volume becomes smaller, it can effectively increase the flue gas flow rate, increase the convection heat transfer coefficient, and enhance the heat exchange capacity of the heat exchange surface.

[0012] 2. The utility model has lower metal consumption. While strengthening heat exchange, the shape of the series tube screen is consistent with the flue and ash hopper structure, reducing the decrease in heat exchange surface utilization coefficient caused by flue gas expansion, and reducing the metal consumption of the heat exchange surface and ash hopper guard plate.

[0013] 3. The utility model has fewer auxiliary equipment. The existing conventional flue has many ash hoppers, which require supporting ash removal equipment, pipelines, and control equipment. The new flue structure can reduce the investment in auxiliary equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the background technology;

[0015] Figure 2 It is a structural schematic diagram of the utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of smoke flow in;

[0017] Figure 4 for Figure 2 The structural diagram in ;

[0018] In the figure: 1- flue, 11- first ash hopper, 12- second ash hopper, 21- first series tube screen, 22- second series tube screen, 23- third series tube screen, 24- fourth series tube screen, 25- fifth series tube screen, 26- sixth series tube screen. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Embodiment 1:

[0022] like Figures 1 to 4 As shown, a high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator comprises a flue 1, an ash hopper is connected below the flue 1, the inclination angle of one side of the ash hopper is larger than that of the other side, series tube panels for cooling flue gas are arranged inside the flue 1 and the ash hopper, and the shape of the series tube panels is arranged in accordance with the flue 1, the series tube panels comprise a first series tube panel part and a second series tube panel part, the first series tube panel part is arranged on the side of the ash hopper with a smaller inclination angle, the second series tube panel part is arranged on the side of the ash hopper with a larger inclination angle, the tube panel lengths of the second series tube panel part decrease in sequence, and an ash scavenging channel is left between the side with the larger inclination angle of the ash hopper, when the high-temperature flue gas in the flue 1 flows through the ash hopper, it is cooled by the second series tube panel part, due to the principle of thermal expansion and contraction, the volume of the cooled flue gas becomes smaller, so the flue 1 and the ash hopper can accommodate more flue gas, and more flue gas can provide more heat for the series tube panel, and can also reasonably and effectively increase the flue gas velocity flushing through the series tube panel, thereby improving the heat transfer capacity.

[0023] Embodiment 2:

[0024] On the basis of Example 1, this embodiment makes an improvement on the ash hopper, and the ash hopper includes a first ash hopper 11 and a second ash hopper 12, and the first ash hopper 11 and the second ash hopper 12 are respectively arranged on both sides below the flue 1. The flue gas flows from left to right in the flue 1, and a part of the flue gas expands and flows along the edge of the first ash hopper 11 and the edge of the second ash hopper 12 in sequence. Since dust and other particles are mixed in the flue gas, after the flue gas is cooled, the dust falls under the action of gravity, slides along the ash discharge channel into the bottom of the first ash hopper 11 and the second ash hopper 12, and the dust is discharged through the bottom of the first ash hopper 11 and the second ash hopper 12.

[0025] Embodiment 3:

[0026] On the basis of Example 2, this embodiment makes an improvement on the first series tube panel part, which includes a first series tube panel 21 and a fourth series tube panel 24. The first series tube panel 21 is arranged on the side with a smaller inclination angle of the first ash hopper 11, and the fourth series tube panel 24 is arranged on the side with a smaller inclination angle of the second ash hopper 12. The tube panel length of the first series tube panel part is shorter than that of the second series tube panel part.

[0027] Embodiment 4:

[0028] On the basis of Example 2, this embodiment makes an improvement on the second series tube panel part, and the second series tube panel part includes a second series tube panel 22 (the tube panel includes several series tubes), a third series tube panel 23, a fifth series tube panel 25 and a sixth series tube panel 26. The second series tube panel 22 and the third series tube panel 23 are arranged on the side of the first ash hopper 11 with a larger inclination angle, and the tube panel lengths of the second series tube panel 22 and the third series tube panel 23 decrease in sequence (that is, the tube panel length of the third series tube panel 23 is shorter than the tube panel length of the second series tube panel 22), the fifth series tube panel 25 and the sixth series tube panel 26 are arranged on the side of the second ash hopper 12 with a larger inclination angle, and the tube panel lengths of the fifth series tube panel 25 and the sixth series tube panel 26 decrease in sequence (that is, the tube panel length of the sixth series tube panel 26 is shorter than the tube panel length of the fifth series tube panel 25).

[0029] The tube panel lengths of the second series tube panel 22 and the third series tube panel 23 decrease from left to right (i.e., the lengths of the various series tubes of the second series tube panel 22 decrease from left to right, and the lengths of the various series tubes of the third series tube panel 23 decrease from left to right), and the tube panel lengths of the fifth series tube panel 25 and the sixth series tube panel 26 decrease from left to right (i.e., the lengths of the various series tubes of the fifth series tube panel 25 decrease from left to right, and the lengths of the various series tubes of the sixth series tube panel 26 decrease from left to right).

[0030] Embodiment 5:

[0031] Based on Examples 1-4, this Example makes improvements to the series-connected tube panels, and cold water circulates inside the series-connected tube panels.

[0032] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator, characterized by: The invention comprises a flue (1), wherein an ash hopper is connected below the flue (1), wherein the inclination angle of one side of the ash hopper is larger than that of the other side, wherein series tube panels for cooling flue gas are arranged inside the flue (1) and the ash hopper, wherein the series tube panels comprise a first series tube panel portion and a second series tube panel portion, wherein the first series tube panel portion is arranged on the side of the ash hopper with a smaller inclination angle, and the second series tube panel portion is arranged on the side of the ash hopper with a larger inclination angle, wherein the tube panel lengths of the second series tube panel portion decrease in sequence, and an ash discharge channel is left between the second series tube panel portion and the side of the ash hopper with a larger inclination angle.

2. According to claim 1, a high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator is characterized by: The ash hopper comprises a first ash hopper (11) and a second ash hopper (12), and the first ash hopper (11) and the second ash hopper (12) are respectively arranged on both sides below the flue (1).

3. According to claim 2, a high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator is characterized by: The first series tube panel part comprises a first series tube panel (21) and a fourth series tube panel (24), wherein the first series tube panel (21) is arranged on the side of the first ash hopper (11) with a smaller inclination angle, and the fourth series tube panel (24) is arranged on the side of the second ash hopper (12) with a smaller inclination angle.

4. The high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator according to claim 2 is characterized in that: The second series tube panel part comprises a second series tube panel (22), a third series tube panel (23), a fifth series tube panel (25) and a sixth series tube panel (26). The second series tube panel (22) and the third series tube panel (23) are arranged on the side of the first ash hopper (11) with a larger inclination angle, and the tube panel lengths of the second series tube panel (22) and the third series tube panel (23) are successively decreased. The fifth series tube panel (25) and the sixth series tube panel (26) are arranged on the side of the second ash hopper (12) with a larger inclination angle, and the tube panel lengths of the fifth series tube panel (25) and the sixth series tube panel (26) are successively decreased.

5. The high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator according to claim 4 is characterized in that: The tube panel lengths of the second series tube panel (22) and the third series tube panel (23) decrease from left to right, and the tube panel lengths of the fifth series tube panel (25) and the sixth series tube panel (26) decrease from left to right.

6. The high-efficiency heat exchange horizontal flue structure suitable for a horizontal waste incinerator according to claim 3 or 5, characterized in that: Cold water circulates inside the series tube panels.

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