Heat preservation furnace for waste gas waste heat recovery

Abstract

The utility model discloses a heat preservation furnace for waste gas waste heat recovery, which comprises a heat preservation furnace body, and a waste gas pipe is fixedly mounted on one side of the top end of the heat preservation furnace body; a water supply pipe penetrates through the other end of the top surface of the recycling box, the top end of the water supply pipe is connected with one side of the bottom of a recycling pipe, the recycling pipe sleeves the top of the waste gas pipe, a water return pipe is fixed at the top end of the recycling pipe, and the bottom end of the water return pipe is connected with the middle of the top surface of the recycling box; a water inlet pipe is fixed to the top of one side of the recycling box, a water drainage pipe is installed at the bottom of the front end of the recycling box, a heat conduction disc is fixedly installed on the outer wall of the waste gas pipe in the recycling box, and flow promoting holes are formed in the heat conduction disc. According to the heat preservation furnace for waste gas waste heat recovery, novel structural design is adopted, different waste heat recovery mechanisms are matched, heat contained in high-temperature waste gas in the waste gas pipe is continuously and efficiently recovered, the overall structure is stable and reliable, and long-time stable work can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat preservation furnaces, in particular to a heat preservation furnace for recovering waste heat from exhaust gas. Background Art

[0002] Aluminum molten holding furnace is a kind of equipment specially used to heat aluminum liquid and keep it at a certain temperature. It adopts electric heating tube for heating and uses thermal instrument to monitor and adjust the heating temperature. Aluminum molten holding furnace is widely used in aluminum product production, smelting and processing.

[0003] The existing holding furnace directly discharges high-temperature exhaust gas, and cannot recycle the waste heat in the exhaust gas. In addition, the recovery efficiency of the existing device that uses water to recover waste heat is not high, and it is impossible to continuously and efficiently recycle the heat in the high-temperature exhaust gas of the aluminum liquid holding furnace. Therefore, it is necessary to design a holding furnace for waste heat recovery of exhaust gas to address the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a heat preservation furnace for recovering waste heat from exhaust gas, so as to solve at least one technical problem existing in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A heat preservation furnace for recovering waste heat from exhaust gas, comprising:

[0007] The insulation furnace body, the exhaust pipe is fixedly installed on one side of the top of the insulation furnace body, the vertical part of the exhaust pipe is installed through one end of the top surface of the recovery box, the bottom end of the exhaust pipe passes through the bottom of one side of the recovery box, the outer wall of the recovery box is installed with an outer insulation shell, and the outer insulation shell is connected and fixed to one side of the insulation furnace body;

[0008] A recovery box, wherein a water supply pipe is installed through the other end of the top surface of the recovery box, a water pump is installed on the water supply pipe, the top end of the water supply pipe is connected to one side of the bottom of the recovery pipe, the recovery pipe is sleeved on the top of the exhaust pipe, a return water pipe is fixed on the top of the recovery pipe, and the bottom end of the return water pipe is connected to the middle of the top surface of the recovery box;

[0009] A recycling box, wherein a water inlet pipe is fixed on the top of one side of the recycling box, a drainage pipe is installed at the bottom of the front end of the recycling box, a heat conduction plate is fixedly installed on the outer wall of the exhaust pipe in the recycling box, and a flow-promoting hole is opened on the heat conduction plate.

[0010] Preferably, the exhaust pipe passes through the top and one side bottom of the recovery box respectively, and the front view shape of the exhaust pipe located inside the recovery box is an "L" shape.

[0011] Preferably, the bottom end of the water supply pipe is lower than the bottom end of the water return pipe, and the top end of the water return pipe is located at the top center of the recovery pipe.

[0012] Preferably, the recovery pipe has an "L" shape when viewed from the front, and the recovery pipe is sleeved on the top of the exhaust pipe close to the end of the insulation furnace body.

[0013] Preferably, the heat conducting plates are densely arranged at equal intervals, and the material of the heat conducting plates is copper or aluminum.

[0014] Preferably, the flow-promoting holes are distributed at equal angles with respect to the center of the heat-conducting disk, and the diameter of the flow-promoting holes is greater than 1 / 3 of the width of the heat-conducting disk.

[0015] Preferably, a servo motor is fixedly mounted at the center of the back side of the recycling box, a horizontal shaft is mounted at the output end of the servo motor, and a flow-promoting fan blade is fixedly mounted at the end of the horizontal shaft located inside the recycling box.

[0016] Preferably, the center of the flow-promoting blade and the center of the recovery box are on the same horizontal line, and the diameter of the flow-promoting blade is greater than half the width of the recovery box.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The new structural design is adopted, and different waste heat recovery mechanisms are used to continuously and efficiently recover the heat contained in the high-temperature exhaust gas in the exhaust pipe. The overall structure is stable and reliable, and can work stably for a long time.

[0019] 1. The utility model pumps cold water into the recovery pipe through a water delivery pipe and a water pump, allowing the cold water to flow from bottom to top, absorbing the heat contained in the exhaust gas at the top of the exhaust pipe during the flow process, and transporting hot water to the recovery tank for storage through the return pipe;

[0020] 2. The utility model absorbs the residual heat contained in the exhaust gas in the exhaust pipe through the heat conduction plate and the flow-promoting holes, and discharges the heated hot water in time through the drain pipe, cooperates with the water inlet pipe to continuously introduce cold water, and at the same time promotes the flow of newly added cold water through the servo motor, horizontal axis and flow-promoting fan blades, ensuring that the water temperature in the recovery box is always at a low level, thereby ensuring the waste heat recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view structural schematic diagram of the utility model.

[0022] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model.

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the top end of the exhaust pipe and the recovery pipe of the utility model.

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the middle part of the recycling box of the utility model when viewed from above.

[0025] In the figure: 1. Insulation furnace body; 2. Exhaust pipe; 3. Recovery box; 4. Outer insulation shell; 5. Water supply pipe; 6. Water pump; 7. Recovery pipe; 8. Return pipe; 9. Water inlet pipe; 10. Drain pipe; 11. Heat transfer plate; 12. Flow-promoting holes; 13. Servo motor; 14. Horizontal axis; 15. Flow-promoting fan blades. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1-4 , an embodiment provided by the utility model:

[0031] A heat preservation furnace for recovering waste heat from exhaust gas, comprising:

[0032] The insulation furnace body 1, the exhaust pipe 2 is fixedly installed on one side of the top of the insulation furnace body 1, the vertical part of the exhaust pipe 2 is installed through one end of the top surface of the recovery box 3, the bottom end of the exhaust pipe 2 passes through the bottom of one side of the recovery box 3, the outer wall of the recovery box 3 is installed with an outer insulation shell 4, and the outer insulation shell 4 is connected and fixed to one side of the insulation furnace body 1;

[0033] A recovery box 3, a water supply pipe 5 is installed through the other end of the top surface of the recovery box 3, a water pump 6 is installed on the water supply pipe 5, the top of the water supply pipe 5 is connected to one side of the bottom of the recovery pipe 7, the recovery pipe 7 is sleeved on the top of the exhaust pipe 2, a return water pipe 8 is fixed on the top of the recovery pipe 7, and the bottom of the return water pipe 8 is connected to the middle of the top surface of the recovery box 3;

[0034] A water inlet pipe 9 is fixed on the top of one side of the recovery box 3, a drain pipe 10 is installed on the bottom of the front end of the recovery box 3, a heat conducting plate 11 is fixedly installed on the outer wall of the exhaust pipe 2 in the recovery box 3, and a flow-promoting hole 12 is opened on the heat conducting plate 11.

[0035] The exhaust pipe 2 passes through the top and one side bottom of the recovery box 3 respectively. The front view shape of the exhaust pipe 2 located inside the recovery box 3 is an "L" shape. The above structural design ensures that the exhaust pipe 2 can be stably installed and allows the exhaust pipe 2 to be in stable contact with the cold water in the recovery box 3.

[0036] The bottom end of the water supply pipe 5 is lower than the bottom end of the return pipe 8, and the top end of the return pipe 8 is located at the top center of the recovery pipe 7. The above-mentioned structural design enables cold water to enter the recovery pipe 7 from the bottom and flow from bottom to top, which can extend the time of cold water in the recovery pipe 7 and improve the waste heat recovery efficiency.

[0037] The recovery pipe 7 has an "L" shape when viewed from the front. The recovery pipe 7 is sleeved on the top of the exhaust pipe 2 close to the end of the insulation furnace body 1. The above structural design enables the recovery pipe 7 to stably cover the top of the exhaust pipe 2 and comprehensively recover the waste heat of the high-temperature exhaust gas in the exhaust pipe 2.

[0038] In one embodiment, the heat conducting plates 11 are densely arranged at equal intervals, and the material of the heat conducting plates 11 is copper or aluminum. The above structural design makes the heat conducting plates 11 have a high heat conducting efficiency and can quickly conduct the waste heat in the exhaust gas to the cold water.

[0039] In one of the preferred embodiments, the flow-promoting holes 12 are distributed at equal angles about the center of the heat-conducting plate 11, and the diameter of the flow-promoting holes 12 is larger than 1 / 3 of the width of the heat-conducting plate 11. The above-mentioned structural design enables the water flow to flow quickly through the flow-promoting holes 12, thereby improving the heat energy recovery efficiency of the heat-conducting plate 11 and the cold water.

[0040] In one of the embodiments, a servo motor 13 is fixedly installed at the center of the back side of the recovery box 3, a horizontal shaft 14 is installed at the output end of the servo motor 13, and a flow-promoting fan blade 15 is fixedly installed at the end of the horizontal shaft 14 located in the recovery box 3. The above-mentioned structural design can promote the flow of water in the recovery box 3, avoid the phenomenon of large temperature difference in different parts, and ensure the heat recovery efficiency.

[0041] In one of the preferred embodiments, the center of the flow-promoting blade 15 is on the same horizontal line as the center of the recycling box 3, and the diameter of the flow-promoting blade 15 is greater than half the width of the recycling box 3. The above-mentioned structural design enables the flow-promoting blade 15 to stir the water in the recycling box 3 to flow quickly, ensuring that the water temperature in different parts of the recycling box 3 is not much different.

[0042] The working principle of the utility model is: when using the device, first pass Figure 2 The water inlet pipe 9 in the recovery box 3 adds enough cold water to cover the top heat conducting plate 11, and then starts the water pump 6 and the servo motor 13. The water pump 6 sends the cold water into the recovery pipe 7 through the water delivery pipe 5. The cold water flows from bottom to top in the recovery pipe 7 and absorbs the heat in the exhaust gas at the top of the exhaust pipe 2. Then the hot water passes through Figure 1 The return pipe 8 in the recovery tank 3 flows back to the recovery tank 3, and the servo motor 13 drives the flow-promoting blades 15 through the horizontal shaft 14 to quickly flow, and quickly mix the return hot water with the remaining cold water to ensure that the temperature of the water in each part of the recovery tank 3 is uniform;

[0043] Then the exhaust gas enters the exhaust pipe 2 located in the recovery tank 3, and the heat conducting plate 11 guides the remaining heat in the exhaust gas into the water in the recovery tank 3. The flow-promoting blades 15 continue to stir and continue to quickly mix the hot water with the remaining cold water. When the water temperature in the recovery tank 3 is high, open Figure 1 The hot water is discharged through the drain pipe 10 for use, and cold water is introduced again through the water inlet pipe 9, so that continuous and stable waste heat recovery of exhaust gas can be carried out.

[0044] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A heat preservation furnace for recovering waste heat from exhaust gas, characterized in that: It includes: A heat preservation furnace body (1), an exhaust pipe (2) is fixedly installed on one side of the top of the heat preservation furnace body (1), the vertical portion of the exhaust pipe (2) is installed through one end of the top surface of the recovery box (3), the bottom end of the exhaust pipe (2) is installed through the bottom of one side of the recovery box (3), an outer heat preservation shell (4) is installed on the outer wall of the recovery box (3), and the outer heat preservation shell (4) is connected and fixed to one side of the heat preservation furnace body (1); A recovery box (3), wherein a water supply pipe (5) is installed through the other end of the top surface of the recovery box (3), a water pump (6) is installed on the water supply pipe (5), the top end of the water supply pipe (5) is connected to one side of the bottom of a recovery pipe (7), the recovery pipe (7) is sleeved on the top of the exhaust pipe (2), a return pipe (8) is fixed to the top of the recovery pipe (7), and the bottom end of the return pipe (8) is connected to the middle of the top surface of the recovery box (3); A recovery box (3), wherein a water inlet pipe (9) is fixed to the top of one side of the recovery box (3), a drain pipe (10) is installed at the bottom of the front end of the recovery box (3), and a heat conduction plate (11) is fixedly installed on the outer wall of the exhaust pipe (2) in the recovery box (3), and a flow-promoting hole (12) is opened on the heat conduction plate (11).

2. The exhaust gas waste heat recovery holding furnace according to claim 1, characterized in that: The exhaust pipe (2) passes through the top and one side bottom of the recovery box (3) respectively; the front view shape of the exhaust pipe (2) located inside the recovery box (3) is an "L" shape.

3. The exhaust gas waste heat recovery holding furnace according to claim 1, characterized in that: The bottom end of the water supply pipe (5) is lower than the bottom end of the water return pipe (8), and the top end of the water return pipe (8) is located at the top center of the recovery pipe (7).

4. The exhaust gas waste heat recovery holding furnace according to claim 1, characterized in that: The recovery pipe (7) has an "L" shape when viewed from the front, and the recovery pipe (7) is sleeved on the top of the exhaust pipe (2) close to the end of the insulation furnace body (1).

5. The exhaust gas waste heat recovery holding furnace according to claim 1, characterized in that: The heat conducting plates (11) are densely arranged at equal intervals, and the material of the heat conducting plates (11) is copper or aluminum.

6. The exhaust gas waste heat recovery holding furnace according to claim 1, characterized in that: The flow-promoting holes (12) are distributed at equal angles with respect to the center of the heat-conducting disk (11), and the diameter of the flow-promoting holes (12) is greater than 1 / 3 of the width of the heat-conducting disk (11).

7. The exhaust gas waste heat recovery holding furnace according to claim 1, characterized in that: A servo motor (13) is fixedly mounted at the center of the back of the recovery box (3), a horizontal shaft (14) is mounted at the output end of the servo motor (13), and a flow-promoting fan blade (15) is fixedly mounted at the end of the horizontal shaft (14) located inside the recovery box (3).

8. The exhaust gas waste heat recovery holding furnace according to claim 7, characterized in that: The center of the flow-promoting blade (15) and the center of the recovery box (3) are located on the same horizontal straight line, and the diameter of the flow-promoting blade (15) is greater than half the width of the recovery box (3).

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