Heat exchanger of sludge fluidized bed incinerator

Abstract

The utility model discloses a heat exchanger of a sludge fluidized bed incinerator, which comprises a heat exchange shell, an air inlet and an air outlet are arranged on the lateral side of the heat exchange shell, a plurality of flue gas channels are arranged in the heat exchange shell, a partition plate is arranged in the heat exchange shell, a top plate is arranged on the upper portion of the heat exchange shell, and the partition plate and the top plate are respectively sleeved on the outer walls of the flue gas channels. The interior of the heat exchange shell is divided into a first heat exchange cavity and a second heat exchange cavity which are vertically distributed through a partition plate and a top plate, the first heat exchange cavity communicates with the second heat exchange cavity, the air inlet is located in the side face of the first heat exchange cavity and communicates with the first heat exchange cavity, and the air outlet is located in the side face of the second heat exchange cavity and communicates with the second heat exchange cavity. By arranging the first heat exchange cavity and the second heat exchange cavity which are distributed up and down, the size of the heat exchanger can be reduced on the premise that the heat exchange stroke is increased and the heat exchange effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of incinerator heat exchange technology, and more specifically, to a heat exchanger for a sludge fluidized bed incinerator. Background Technology

[0002] Currently, the common method for sludge treatment is to burn the combustible materials in the sludge using a fluidized bed incinerator, and then recycle the remaining residue. The heat generated by incineration can be used to generate electricity. During incineration, air needs to be added to the incinerator. In order to improve the incineration effect, the air needs to exchange heat with the high-temperature flue gas generated by the incinerator through a heat exchanger before entering the incinerator.

[0003] Existing heat exchangers have long heat exchange channels to ensure effective air heat exchange, resulting in long heat exchanger dimensions and a large space occupation, which is not conducive to the installation of heat exchangers. Therefore, there is an urgent need to improve this. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a heat exchanger for a sludge fluidized bed incinerator. By setting up a first heat exchange chamber and a second heat exchange chamber distributed vertically, the size of the heat exchanger can be reduced while increasing the heat exchange stroke and ensuring the heat exchange effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heat exchanger for a sludge fluidized bed incinerator, comprising a heat exchange shell, an air inlet and an air outlet on the side of the heat exchange shell, multiple flue gas channels inside the heat exchange shell, a partition inside the heat exchange shell, and a top plate on the upper part of the heat exchange shell. The partition and the top plate are respectively fitted onto the outer wall of the flue gas channels. The heat exchange shell is divided by the partition and the top plate to form a first heat exchange chamber and a second heat exchange chamber distributed vertically. The first heat exchange chamber and the second heat exchange chamber are connected. The air inlet is located on the side of the first heat exchange chamber and is connected to the first heat exchange chamber. The air outlet is located on the side of the second heat exchange chamber and is connected to the second heat exchange chamber.

[0006] Furthermore, the heat exchange shell is provided with a first waist-shaped tube and a second waist-shaped tube arranged at intervals. The flue gas passage is located inside the first waist-shaped tube and the second waist-shaped tube respectively. The first heat exchange chamber and the second heat exchange chamber form an S-shaped heat exchange channel through the first waist-shaped tube and the second waist-shaped tube.

[0007] Furthermore, one end of the first waist-shaped tube is connected to the inner wall of one side of the heat exchange shell through a first connecting rib, and the end of the second waist-shaped tube away from the first connecting rib is connected to the inner wall of the other side of the heat exchange shell through a second connecting rib.

[0008] Furthermore, the partition plate and the top plate are welded and fixed to the inner wall of the heat exchange shell, the outer wall of the first waist-shaped tube, and the outer wall of the second waist-shaped tube, respectively.

[0009] Furthermore, the air inlet and air outlet are located on the same side, and the partition has a notch away from the air inlet, through which the first heat exchange chamber and the second heat exchange chamber are connected.

[0010] Furthermore, the first waist-shaped tube is provided with a plurality of first baffles on the side facing the second waist-shaped tube, and the second waist-shaped tube is provided with a second baffle corresponding to the first baffle on the side facing the first waist-shaped tube. The first baffle and the second baffle are staggered, and the lower part of the partition abuts against the upper part of the first baffle and the second baffle respectively.

[0011] Furthermore, a flue is fixed to the upper part of the heat exchange shell, and a baffle is installed inside the flue. The baffle is rotatably connected to the flue via a rotating shaft. When the lower part of the baffle abuts against the inner surface of the flue, the baffle is inclined downward toward the opening of the flue away from the heat exchange shell.

[0012] In summary, this utility model has the following beneficial effects:

[0013] When gas is supplied to the interior of the incinerator, the gas enters the first heat exchange chamber through the inlet, then enters the second heat exchange chamber through the notch, and finally enters the interior of the incinerator through the outlet. The gas in both the first and second heat exchange chambers undergoes heat exchange and heating through the first and second oblong tubes. This embodiment, by employing a double-layered heat exchange chamber design, significantly reduces the overall size of the heat exchange shell while increasing the heat exchange stroke and ensuring heat exchange efficiency. This reduces the amount of manufacturing materials used, lowers the overall weight, reduces production costs, and makes installation more convenient. Furthermore, by setting multiple first and second oblong tubes, the flue gas can be diverted, increasing the heat exchange area with the gas and improving the heat exchange effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation structure in this embodiment;

[0015] Figure 2 This is a sectional view of the main view of this embodiment;

[0016] Figure 3 This is a cross-sectional view of the top view pair in this embodiment;

[0017] Figure 4 This is a cross-sectional view of the top view of this embodiment.

[0018] Reference numerals in the attached drawings: 1. Heat exchange shell; 11. Air inlet; 12. Air outlet; 13. First oblong tube; 14. First connecting rib; 15. Second oblong tube; 16. Second connecting rib; 17. Flue gas passage; 18. First baffle; 19. Second baffle; 2. Baffle plate; 21. Notch; 3. Top plate; 4. First heat exchange chamber; 5. Second heat exchange chamber; 6. Exhaust pipe; 61. Rotating shaft; 7. Baffle; 8. Incinerator body. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 4 As shown in the figure, this embodiment discloses a heat exchanger for a sludge fluidized bed incinerator, including a heat exchange shell 1. The heat exchange shell 1 has an air inlet 11 and an air outlet 12 on its side. The heat exchange shell 1 has multiple flue gas channels 17 inside. The heat exchange shell 1 has a partition 2 inside. The heat exchange shell 1 has a top plate 3 on its upper part. The partition 2 and the top plate 3 are respectively sleeved on the outer wall of the flue gas channels 17. Specifically, the heat exchange shell 1 has a first waist-shaped tube 13 and a second waist-shaped tube 15 arranged at intervals inside. The flue gas... Channels 17 are located inside the first waist-shaped tube 13 and the second waist-shaped tube 15 respectively. The partition plate 2 and the top plate 3 are welded and fixed to the inner wall of the heat exchange shell 1, the outer wall of the first waist-shaped tube 13 and the outer wall of the second waist-shaped tube 15 respectively. During assembly, the partition plate 2 is first placed inside the heat exchange shell 1 and welded and fixed to form a complete second heat exchange cavity 5. Then the top plate 3 is covered on the upper part of the heat exchange shell 1 and welded and fixed to form a complete first heat exchange cavity 4. The first heat exchange cavity 4 is located above the second heat exchange cavity 5.

[0021] The heat exchange shell 1 is divided by a partition 2 and a top plate 3 to form a first heat exchange chamber 4 and a second heat exchange chamber 5 distributed vertically. The first heat exchange chamber 4 and the second heat exchange chamber 5 are connected. The air inlet 11 is located on the side of the first heat exchange chamber 4 and is connected to it. The air outlet 12 is located on the side of the second heat exchange chamber 5 and is connected to it. The air inlet 11 and the air outlet 12 are arranged on the same side. The partition 2 has a notch 21 away from the air inlet 11. The first heat exchange chamber 4 and the second heat exchange chamber 5 are connected through the notch 21. The air inlet 11 is connected to an external air source. The air outlet 12 is connected to the inside of the incinerator body 8. When the incinerator 8 is working, the generated flue gas will pass through the flue gas channel 17. When air is supplied to the inside of the incinerator body 8, the gas enters from the air inlet. The gas enters the first heat exchange chamber 4, and after passing through the first heat exchange chamber 4, it enters the second heat exchange chamber 5 through the notch 21. Finally, it enters the interior of the incinerator body 8 through the gas outlet 12. The gas in the first heat exchange chamber 4 and the second heat exchange chamber 5 undergoes heat exchange and heating through the first waist-shaped tube 13 and the second waist-shaped tube 15. In this embodiment, by adopting the design of upper and lower double-layer heat exchange chambers, the overall size of the heat exchange shell 1 can be greatly reduced while increasing the heat exchange stroke and ensuring the heat exchange effect. This reduces the amount of manufacturing materials used, lowers the overall weight, makes the production cost lower, and makes the installation more convenient. Furthermore, by setting multiple first waist-shaped tubes 13 and second waist-shaped tubes 14, the flue gas can be diverted, increasing the heat exchange area with the gas and improving the heat exchange effect.

[0022] like Figure 3 and Figure 4 As shown, the first heat exchange chamber 4 and the second heat exchange chamber 5 form an S-shaped heat exchange channel through the first waist-shaped tube 13 and the second waist-shaped tube 15. Specifically, one end of the first waist-shaped tube 13 is connected to the inner wall of one side of the heat exchange shell 1 through the first connecting rib 14, and the end of the second waist-shaped tube 15 away from the first connecting rib 14 is connected to the inner wall of the other side of the heat exchange shell 1 through the second connecting rib 16. Through the above design, the heat exchange stroke of the flue gas can be greatly increased, which is beneficial to improving the heat exchange effect.

[0023] Furthermore, the first waist-shaped tube 13 is provided with a plurality of first baffles 18 on the side facing the second waist-shaped tube 15, and the second waist-shaped tube 15 is provided with a second baffle 19 corresponding to the first baffles 18 on the side facing the first waist-shaped tube 13. The first baffles 18 and the second baffles 19 are staggered. The lower part of the partition 2 abuts against the upper part of the first baffles 18 and the second baffles 19 respectively. By setting the first baffles 18 and the second baffles 19, not only can heat conduction be achieved, but the heat exchange effect of the gas can also be further improved.

[0024] like Figure 2As shown, a flue gas duct 6 is fixed to the upper part of the heat exchange shell 1. A baffle 7 is installed inside the flue gas duct 6. The baffle 7 is rotatably connected to the flue gas duct 6 via a rotating shaft 61. When the lower part of the baffle 7 abuts against the inner surface of the flue gas duct 6, the baffle 7 is inclined downward toward the opening of the flue gas duct 6 away from the heat exchange shell 1. When the incinerator body 8 is cold-started, the gas supply to the incinerator body 8 is relatively small, and the flue gas produced by the incinerator body 8 is also relatively small. At this time, the flue gas cannot push the baffle 7 to move, and the size of the flue gas outlet of the flue gas duct 6 is limited by the baffle 7 and is in a small size state. By reducing the size of the flue gas outlet, the flow of flue gas during cold start is reduced, thereby reducing the heat loss during flue gas flow, which is conducive to gas heat exchange and accelerates the temperature rise after gas heat exchange. When the incinerator body 8 is working stably, its gas supply and flue gas production are relatively large. The flue gas can directly push the baffle 7 to rotate counterclockwise along the rotating shaft 61, thereby expanding the size of the flue gas outlet and ensuring the flue gas flow.

[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heat exchanger for a sludge fluidized bed incinerator, characterized in that, The device includes a heat exchange shell (1), which has an air inlet (11) and an air outlet (12) on its side. The heat exchange shell (1) has multiple flue gas channels (17) inside. The heat exchange shell (1) has a partition (2) inside. The heat exchange shell (1) has a top plate (3) on its upper part. The partition (2) and the top plate (3) are respectively fitted onto the outer wall of the flue gas channels (17). The heat exchange shell (1) is divided by the partition (2) and the top plate (3) to form a first heat exchange chamber (4) and a second heat exchange chamber (5) distributed vertically. The first heat exchange chamber (4) and the second heat exchange chamber (5) are connected. The air inlet (11) is located on the side of the first heat exchange chamber (4) and is connected to the first heat exchange chamber (4). The air outlet (12) is located on the side of the second heat exchange chamber (5) and is connected to the second heat exchange chamber (5).

2. The heat exchanger for a sludge fluidized bed incinerator according to claim 1, characterized in that, The heat exchange shell (1) is provided with a first waist-shaped tube (13) and a second waist-shaped tube (15) spaced apart. The flue gas passage (17) is located inside the first waist-shaped tube (13) and the second waist-shaped tube (15) respectively. The first heat exchange chamber (4) and the second heat exchange chamber (5) form an S-shaped heat exchange channel through the first waist-shaped tube (13) and the second waist-shaped tube (15).

3. The heat exchanger for a sludge fluidized bed incinerator according to claim 2, characterized in that, One end of the first waist-shaped tube (13) is connected to the inner wall of one side of the heat exchange shell (1) through the first connecting rib (14), and the end of the second waist-shaped tube (15) away from the first connecting rib (14) is connected to the inner wall of the other side of the heat exchange shell (1) through the second connecting rib (16).

4. The heat exchanger for a sludge fluidized bed incinerator according to claim 2, characterized in that, The partition (2) and the top plate (3) are respectively welded and fixed to the inner wall of the heat exchange shell (1), the outer wall of the first waist-shaped tube (13), and the outer wall of the second waist-shaped tube (15).

5. The heat exchanger for a sludge fluidized bed incinerator according to claim 2, characterized in that, The air inlet (11) and air outlet (12) are located on the same side. The partition (2) has a notch (21) away from the air inlet (11). The first heat exchange chamber (4) and the second heat exchange chamber (5) are connected through the notch (21).

6. The heat exchanger for a sludge fluidized bed incinerator according to claim 2, characterized in that, The first waist-shaped tube (13) has a plurality of first baffles (18) on the side facing the second waist-shaped tube (15), and the second waist-shaped tube (15) has a second baffle (19) corresponding to the first baffles (18) on the side facing the first waist-shaped tube (13). The first baffles (18) and the second baffles (19) are staggered, and the lower part of the partition (2) abuts against the upper part of the first baffles (18) and the second baffles (19) respectively.

7. The heat exchanger for a sludge fluidized bed incinerator according to claim 1, characterized in that, A flue pipe (6) is fixed on the upper part of the heat exchange shell (1). A baffle (7) is provided inside the flue pipe (6). The baffle (7) is rotatably connected to the flue pipe (6) through a rotating shaft (61). When the lower part of the baffle (7) abuts against the inner surface of the flue pipe (6), the baffle (7) is inclined downward toward the opening of the flue pipe (6) away from the heat exchange shell (1).

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