Device for recovering waste heat from waste gas

Abstract

The utility model discloses a waste gas waste heat recovery device which comprises a heat preservation cylinder and bases symmetrically fixed to the side wall of the heat preservation cylinder, a gas inlet pipe and a gas outlet pipe are fixedly connected to the two ends of the heat preservation cylinder in an inserted mode respectively, a metal box is arranged in the heat preservation cylinder, and a rotating mechanism used for rotating the metal box is arranged between the gas inlet pipe and the gas outlet pipe. A first baffle and a second baffle are fixed in the metal box, a heat conduction mechanism is arranged on the side wall of the metal box, and a first exhaust pipe is fixedly connected to the first baffle and the second baffle in an inserted mode. The metal box is divided into three chambers by the first baffle and the second baffle, so that waste gas flows back in the metal box, and the flow rate of the waste gas can be controlled by the semi-sphere and the circular ring, so that the output path of the waste gas is increased, more waste gas is accumulated between the first baffle and the second baffle, and the waste gas can be recycled. Quantitative waste gas always exists in the metal box, and therefore stable heat conduction can be kept.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas waste heat recovery, in particular to a device for recovering waste heat from waste gas. Background Technique

[0002] The device for recovering waste heat from waste gas mainly includes a waste heat recovery device, a waste heat boiler, etc. These devices are mainly used for recovering low-grade heat energy such as waste gas and waste liquid discharged during industrial production processes.

[0003] In the currently used device for recovering waste heat from waste gas, the flow rate of the waste gas in the medium is relatively fast. Comparatively speaking, it cannot be in contact with the medium for a long time, and its heat conversion is low, resulting in low efficiency of waste heat recovery.

[0004] Therefore, there is an urgent need for a device for recovering waste heat from waste gas to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for recovering waste heat from waste gas to solve the problem of low efficiency of waste heat recovery mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A device for recovering waste heat from waste gas, including a heat preservation cylinder and bases symmetrically fixed on the side wall of the heat preservation cylinder. The two ends of the heat preservation cylinder are respectively fixedly inserted with an air inlet pipe and an air outlet pipe, and a metal box is arranged inside the heat preservation cylinder. A rotating mechanism for rotating the metal box is arranged between the air inlet pipe and the air outlet pipe. A first baffle and a second baffle are fixed inside the metal box, and a heat conduction mechanism is arranged on the side wall of the metal box. The first baffle and the second baffle are fixedly inserted with a first exhaust pipe, and the second baffle is fixedly inserted with a second exhaust pipe and a third exhaust pipe. The end of the third exhaust pipe is fixed on the side wall of the metal box, and a first elastic mechanism is arranged inside the third exhaust pipe. Feed ports and discharge ports are opened on the side wall of the heat preservation cylinder.

[0007] The first elastic mechanism includes a first mounting frame fixed at the end of the third exhaust pipe, and a circular ring is fixed on the inner wall of the third exhaust pipe. A semi-sphere is inserted inside the third exhaust pipe, and a telescopic mechanism is arranged inside the third exhaust pipe.

[0008] The telescopic mechanism includes a first spring inserted inside the third exhaust pipe, and both ends of the first spring are respectively fixed on the opposite side walls of the semi-sphere and the first mounting frame.

[0009] The heat conduction mechanism includes a plurality of uniformly distributed mounting openings opened on the side wall of the metal box, and heat conduction wing plates are fixedly inserted inside the mounting openings.

[0010] The rotating mechanism includes a first rotating ring inserted into the intake pipe, and the first rotating ring penetrates and is fixed to the side wall of the metal box. A second rotating ring is inserted into the exhaust pipe, and the second rotating ring penetrates the side wall of the metal box. The end of the second rotating ring is fixed to the end of the third exhaust pipe. A second mounting bracket is fixed to the side wall of the first rotating ring, and a driving mechanism for rotating the first rotating ring is provided in the intake pipe.

[0011] The driving mechanism includes a third mounting bracket fixed in the intake pipe, and a vortex fan is fixed to the side wall of the third mounting bracket. The rotating shaft of the vortex fan is fixed with a rotating rod, and the rotating rod is fixed to the side wall of the second mounting bracket.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For the waste gas heat recovery device of the present utility model, the metal box is divided into three chambers by the first baffle and the second baffle, so that the waste gas forms a reflux in the metal box. By using the semi-sphere and the ring, the flow rate of the waste gas can be controlled, that is, the output path of the waste gas is increased, and the waste gas accumulates more between the first baffle and the second baffle, ensuring that there is always a certain amount of waste gas in the metal box, so as to maintain relatively stable heat conduction.

[0014] 2. For the waste gas heat recovery device of the present utility model, by using the vortex fan, the rotating rod, the first rotating ring, the metal box and the second rotating ring, the medium in the heat preservation cylinder can be disturbed, the flow of the medium in the heat exchanger can be increased, the heat transfer area can be increased, and more medium can be in contact with the heat conduction wing plates and the metal box, thereby increasing the waste heat recovery efficiency. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the waste gas heat recovery device of the present utility model;

[0016] Figure 2 is a schematic cross-sectional structural diagram of the waste gas heat recovery device of the present utility model;

[0017] Figure 3 is Figure 2 the enlarged structural diagram at A of

[0018] Figure 4 is Figure 2 the enlarged structural diagram at B of

[0019] Figure 5 is a schematic cross-sectional structural diagram of the metal box of the waste gas heat recovery device of the present utility model.

[0020] In the figure: 1, heat preservation cylinder; 2, base; 3, intake pipe; 4, exhaust pipe; 5, metal box; 601, installation port; 602, heat conduction wing plate; 7, first baffle; 8, second baffle; 9, first exhaust pipe; 10, second exhaust pipe; 11, third exhaust pipe; 1201, first mounting bracket; 1202, circular ring; 1203, semi-sphere; 13, first spring; 14, feed inlet; 1501, first rotating ring; 1502, second rotating ring; 1503, second mounting bracket; 1601, mounting bracket; 1602, vortex fan; 1603, rotating rod; 17, discharge port. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-5 , a device for recovering waste heat of exhaust gas provided by the present invention includes a heat preservation cylinder 1 and bases 2 symmetrically fixed on the side wall of the heat preservation cylinder 1. An intake pipe 3 and an exhaust pipe 4 are respectively and fixedly inserted at both ends of the heat preservation cylinder 1, and a metal box 5 is arranged inside the heat preservation cylinder 1. A rotating mechanism for rotating the metal box 5 is arranged between the intake pipe 3 and the exhaust pipe 4. A first baffle 7 and a second baffle 8 are fixed inside the metal box 5, and a heat conduction mechanism is arranged on the side wall of the metal box 5. A first exhaust pipe 9 is fixedly inserted on the first baffle 7 and the second baffle 8, and a second exhaust pipe 10 and a third exhaust pipe 11 are fixedly inserted on the second baffle 8. The end of the third exhaust pipe 11 is fixed on the side wall of the metal box 5, and a first elastic mechanism is arranged inside the third exhaust pipe 11. A feed inlet 14 and a discharge port 17 are opened on the side wall of the heat preservation cylinder 1. The metal box 5 is divided into a first chamber, a second chamber and a third chamber from right to left by the first baffle 7 and the second baffle 8. The first exhaust pipe 9, the second exhaust pipe 10 and the third exhaust pipe 11 are used to make the exhaust gas form a reflux inside the metal box 5, increasing the output path of the exhaust gas;

[0023] The first elastic mechanism includes a first mounting bracket 1201 fixed at the end of the third exhaust pipe 11, a circular ring 1202 is fixed on the inner wall of the third exhaust pipe 11, a semi-sphere 1203 is inserted inside the third exhaust pipe 11, and a telescopic mechanism is arranged inside the third exhaust pipe 11. The flow rate of the exhaust gas is controlled through the semi-sphere 1204 and the circular ring 1203, so that more exhaust gas accumulates between the first baffle 7 and the second baffle 8;

[0024] The telescopic mechanism includes a first spring 13 inserted into the third exhaust pipe 11, and both ends of the first spring 13 are respectively fixed on the opposite side walls of the semi-sphere 1203 and the first mounting bracket 1201. By using the elasticity of the first spring 13, when the exhaust gas decreases, the semi-sphere 1204 will be retracted under the action of the first spring 1202, reducing the flow rate of the exhaust gas, so that a relatively stable air pressure is always maintained between the first baffle 7 and the second baffle 8;

[0025] The heat conduction mechanism includes a plurality of uniformly distributed mounting openings 601 opened on the side wall of the metal box 5, and heat conduction wing plates 602 are fixedly inserted into the mounting openings 601 to conduct the heat of the exhaust gas in the metal box 5 by using the heat conduction wing plates 602;

[0026] The rotating mechanism includes a first rotating ring 1501 inserted into the intake pipe 3, and the first rotating ring 1501 penetrates and is fixed on the side wall of the metal box 5. A second rotating ring 1502 is inserted into the outlet pipe 4, and the second rotating ring 1502 penetrates the side wall of the metal box 5. The end of the second rotating ring 1502 is fixed to the end of the third exhaust pipe 11. A second mounting bracket 1503 is fixed on the side wall of the first rotating ring 1501, and a driving mechanism for the rotation of the first rotating ring 1501 is provided in the intake pipe 3. The metal box 5 can be rotated by using the first rotating ring 1501 and the second rotating ring 1502;

[0027] The driving mechanism includes a third mounting bracket 1601 fixed in the intake pipe 3, and a scroll fan 1602 is fixed on the side wall of the third mounting bracket 1601. A rotating rod 1603 is fixed to the rotating shaft of the scroll fan 1602, and the rotating rod 1603 is fixed to the side wall of the second mounting bracket 1503. The exhaust gas drives the scroll fan 1602 to rotate, so that the metal box 5 rotates, thereby realizing the flow of the medium.

[0028] Working principle: When in use, the exhaust gas enters from the intake pipe 3, drives the scroll fan 1602 to rotate, and drives the rotating rod 1603 to drive the first rotating ring 1501, the metal box 5 and the second rotating ring 1502 to rotate, which can rotate the medium in the heat preservation cylinder 1, increase the flow of the medium in the heat exchanger, increase the heat transfer area, and enable more medium to contact the heat conduction wing plates 602 and the metal box 5, thereby increasing the heat transfer efficiency;

[0029] The metal box 5 is divided into a first chamber, a second chamber and a third chamber by the first baffle 7 and the second baffle 8. When the exhaust gas enters the metal box 5, it flows from the first chamber to the third chamber and then to the second chamber, causing the exhaust gas to form a reflux inside the metal box 5, increasing the output path of the exhaust gas. The temperature between the first baffle 7 and the second baffle 8 will also increase. At the same time, the exhaust gas accumulates between the first baffle 7 and the second baffle 8, and the air pressure will increase to push the second baffle 8 to slide on the guide rod 1303. When the air pressure is large enough, the hemispherical ball 1204 in the third exhaust pipe 11 is pushed out of the ring 1203, and the exhaust gas is discharged from the third exhaust pipe 11. If the exhaust gas decreases, the hemispherical ball 1204 will be retracted under the action of the first spring 1202, reducing the flow rate of the exhaust gas, so that a relatively stable air pressure is always maintained between the first baffle 7 and the second baffle 8, ensuring that there is always a certain amount of exhaust gas inside the metal box 5, and thus a relatively stable heat conduction can be maintained.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A device for recovering waste heat from exhaust gas, comprising a heat preservation tube (1) and a base (2) symmetrically fixed to the side wall of the heat preservation tube (1), characterized in that: An air inlet pipe (3) and an air outlet pipe (4) are fixedly connected at both ends of the heat-insulating cylinder (1), and a metal box (5) is arranged inside the heat-insulating cylinder (1). A rotating mechanism for rotating the metal box (5) is arranged between the air inlet pipe (3) and the air outlet pipe (4). A first baffle plate (7) and a second baffle plate (8) are fixed inside the metal box (5), and a heat conduction mechanism is arranged on the side wall of the metal box (5). A first exhaust pipe (9) is fixedly connected to the first baffle plate (7) and the second baffle plate (8), and a second exhaust pipe (10) and a third exhaust pipe (11) are fixedly connected to the second baffle plate (8). An end of the third exhaust pipe (11) is fixed to the side wall of the metal box (5), and a first elastic mechanism is arranged inside the third exhaust pipe (11). A feed inlet (14) and a discharge outlet (17) are arranged on the side wall of the heat-insulating cylinder (1).

2. The device for recovering waste heat from exhaust gas according to claim 1, characterized in that: The first elastic mechanism comprises a first mounting frame (1201) fixed to the end of the third exhaust pipe (11), a ring (1202) is fixed to the inner wall of the third exhaust pipe (11), a semicircular ball (1203) is inserted into the third exhaust pipe (11), and a telescopic mechanism is arranged in the third exhaust pipe (11).

3. The device for recovering waste heat from exhaust gas according to claim 2, characterized in that: The telescopic mechanism comprises a first spring (13) inserted into the third exhaust pipe (11), and two ends of the first spring (13) are respectively fixed to the semicircular ball (1203) and the opposite side walls of the first mounting frame (1201).

4. The device for recovering waste heat from exhaust gas according to claim 1, characterized in that: The heat conduction mechanism comprises a plurality of evenly distributed installation openings (601) formed on the side wall of the metal box (5), and a heat conduction wing plate (602) is fixedly inserted into the installation opening (601).

5. The device for recovering waste heat from exhaust gas according to claim 1, characterized in that: The rotating mechanism comprises a first rotating ring (1501) inserted into the air inlet pipe (3), and the first rotating ring (1501) penetrates and is fixed to the side wall of the metal box (5); a second rotating ring (1502) is inserted into the air outlet pipe (4), and the second rotating ring (1502) penetrates the side wall of the metal box (5); an end of the second rotating ring (1502) is fixed to the end of a third exhaust pipe (11); a second mounting frame (1503) is fixed to the side wall of the first rotating ring (1501), and a driving mechanism for rotating the first rotating ring (1501) is provided in the air inlet pipe (3).

6. The device for recovering waste heat from exhaust gas according to claim 5, characterized in that: The driving mechanism comprises a third mounting frame (1601) fixed in the air intake pipe (3), and a turbofan (1602) is fixed to the side wall of the third mounting frame (1601), a rotating shaft of the turbofan (1602) is fixed to a rotating rod (1603), and the rotating rod (1603) is fixed to the side wall of the second mounting frame (1503).

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