Device convenient for boiler sewage heat energy and power recovery

Abstract

The utility model discloses a device convenient for boiler sewage heat energy and power recovery, which relates to the field of waste heat recovery and comprises a hot water tank, one end of the hot water tank is fixedly connected with a water inlet pipe, and a water outlet pipe is fixedly connected below the periphery of the other end of the water inlet pipe. A heat exchange mechanism penetrating into the hot water tank is arranged outside the hot water tank, and a stirring mechanism penetrating into an inner cavity of the hot water tank is installed at the end, close to the water inlet pipe, of the hot water tank. The heat exchange mechanism comprises a heat exchange inlet pipe penetrating from the lower portion of the hot water tank to an inner cavity of the hot water tank, and the output end of the heat exchange inlet pipe is fixedly connected with a spiral heat exchange pipe. According to the utility model, by arranging the stirring mechanism, when heat exchange for waste heat recycling is carried out, the stirring mechanism is started, and the rotating stirring mechanism promotes boiler waste water to flow, so that the phenomenon of heat stratification of a water body is avoided, and the heat exchange efficiency for waste heat recycling is ensured.

Description

Technical Field

[0001] The utility model relates to the field of waste heat recovery, in particular to a device for recovering heat energy and power from boiler sewage. Background Art

[0002] Boiler wastewater has a relatively high temperature. Before discharge, a heat exchange device is generally used to heat the boiler wastewater, thereby recovering and utilizing the heat contained in the boiler wastewater.

[0003] During the use of the existing recovery device, as the heat exchange process proceeds, due to the thermal stratification of the water body and the water body being in a static state, the water temperature in the hot water tank is unevenly distributed, thereby affecting the heat exchange efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a device for recovering heat and power from boiler sewage in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a device for recovering heat and power from boiler sewage, comprising a hot water tank, one end of the hot water tank being fixedly connected to a water inlet pipe, the other end of the water inlet pipe being fixedly connected to a water outlet pipe below the outer periphery thereof, a heat exchange mechanism being provided on the outside of the hot water tank and penetrating into the interior of the hot water tank, and a stirring mechanism being installed on the end of the hot water tank close to the water inlet pipe and penetrating into the inner cavity of the hot water tank;

[0006] The heat exchange mechanism includes a heat exchange inlet pipe that passes through the bottom of the hot water tank to the inner cavity of the hot water tank, the output end of the heat exchange inlet pipe is fixedly connected to a spiral heat exchange pipe, the output end of the heat exchange pipe is connected to a heat exchange outlet pipe that passes through the outside of the hot water tank, and the outside of the heat exchange outlet pipe is wrapped with an insulation pipe.

[0007] As a further solution of the present invention: the stirring mechanism includes a rotating motor installed at one end of the hot water tank through a mounting bracket, the output end of the rotating motor passes through the inner cavity of the hot water tank and is connected to a gear, the outer periphery of the gear is engaged with a gear ring, and the outer periphery of the gear ring is integrally formed with a ring plate.

[0008] As a further solution of the present invention: the stirring mechanism also includes a rotating ring integrally formed on the outer periphery of the annular plate, the inner wall of the hot water tank is provided with an annular groove for the rotating ring to rotate, and the inner periphery of the annular plate is located on one side of the gear ring and is integrally formed with a connecting frame, the center of the connecting frame is aligned with the center of the hot water tank, and the thickness of the gear ring and the connecting frame is equal to the thickness of the annular plate.

[0009] As a further solution of the present invention: the stirring mechanism also includes a rotating shaft fixedly connected to one end of the center plate portion of the connecting frame, the other end of the rotating shaft is rotatably connected to the end plate of the hot water tank, the rotating shaft is located at the center position of the hot water tank, and a stirring rod is welded to the outer periphery of the rotating shaft.

[0010] As a further solution of the present invention: the inner wall of the hot water tank is integrally formed with an inner conical surface, the end of the inner conical surface close to the water inlet pipe is a narrow end, and the end of the inner conical surface close to the water outlet pipe is a wide end.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. By setting up a stirring mechanism, when performing heat exchange for waste heat recovery and utilization, by starting the stirring mechanism, the rotating stirring mechanism causes the boiler waste water to flow, thereby avoiding the phenomenon of thermal stratification of the water body, thereby ensuring the heat exchange efficiency of waste heat recovery and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the installation of the stirring rod of the present invention.

[0016] In the figure: 1. Hot water tank; 2. Water inlet pipe; 3. Water outlet pipe; 4. Heat exchange inlet pipe; 5. Heat exchange outlet pipe; 6. Rotating motor; 7. Gear; 8. Ring plate; 9. Rotating ring; 10. Connecting frame; 11. Rotating shaft; 12. Heat exchange tube; 13. Inner cone; 14. Stirring rod; 15. Gear ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1 to 3In an embodiment of the utility model, a device for recovering heat energy and power from boiler sewage is provided, comprising a hot water tank 1, one end of the hot water tank 1 is fixedly connected to a water inlet pipe 2, the other end of the water inlet pipe 2 is fixedly connected to a water outlet pipe 3 below the outer periphery, a heat exchange mechanism penetrating into the interior of the hot water tank 1 is provided on the outside of the hot water tank 1, and a stirring mechanism penetrating into the inner cavity of the hot water tank 1 is installed on the end of the hot water tank 1 close to the water inlet pipe 2; the heat exchange mechanism comprises a heat exchange inlet pipe 4 penetrating from the bottom of the hot water tank 1 to the inner cavity of the hot water tank 1, the output end of the heat exchange inlet pipe 4 is fixedly connected to a spiral heat exchange pipe 12, the output end of the heat exchange pipe 12 is connected to a heat exchange outlet pipe 5 penetrating into the outside of the hot water tank 1, and the outside of the heat exchange outlet pipe 5 is wrapped with an insulation pipe.

[0019] In this embodiment, the high-temperature wastewater generated by the operation of the boiler is first input into the hot water tank 1 through the water inlet pipe 2 by a water pump. At this time, the valve on the water inlet pipe 2 is in an open state, and the valve on the water outlet pipe 3 is in a closed state. Then, by starting the pump connected to the heat exchange inlet pipe 4, the heat exchange medium (such as heat transfer oil) is input into the heat exchange pipe 12. After entering the heat exchange pipe 12, the heat transfer oil exchanges heat with the high-temperature wastewater through the heat exchange pipe 12. At this time, the temperature of the heat transfer oil increases. After the heat exchange, the heat transfer oil is output to the heating equipment through the heat exchange outlet pipe 5, thereby completing the utilization of the waste heat of the high-temperature wastewater.

[0020] During the heat exchange process, the stirring mechanism is started synchronously to stir the high-temperature wastewater, so that during the heat exchange process, the temperature of the high-temperature wastewater inside the hot water tank 1 is in a balanced state and no thermal stratification occurs.

[0021] Please refer to Figure 1 、 Figure 2 and Figure 3 The stirring mechanism includes a rotating motor 6 installed at one end of the hot water tank 1 through a mounting bracket, the output end of the rotating motor 6 passes through the inner cavity of the hot water tank 1 and is connected to a gear 7, the outer periphery of the gear 7 is meshed with a gear ring 15, and the outer periphery of the gear ring 15 is integrally formed with an annular plate 8, the stirring mechanism also includes a rotating ring 9 integrally formed on the outer periphery of the annular plate 8, the inner wall of the hot water tank 1 is provided with an annular groove for the rotating ring 9 to rotate, the inner periphery of the annular plate 8 is located on one side of the gear ring 15 and is integrally formed with a connecting frame 10, the center of the connecting frame 10 is aligned with the center of the hot water tank 1, the thickness of the gear ring 15 and the connecting frame 10 is equal to the thickness of the annular plate 8, the stirring mechanism also includes a rotating shaft 11 fixedly connected to one end of the center plate portion of the connecting frame 10, the other end of the rotating shaft 11 is rotatably connected to the end plate of the hot water tank 1, the rotating shaft 11 is located at the center position of the hot water tank 1, and a stirring rod 14 is welded to the outer periphery of the rotating shaft 11.

[0022] In the embodiment, the rotating motor 6 is started to drive the gear 7 at the output end to rotate, the rotating gear 7 drives the gear ring 15 to rotate around the rotating shaft 11, the rotating gear ring 15 drives the annular plate 8 to rotate synchronously, the rotating annular plate 8 drives the rotating ring 9 to rotate in the annular groove, and the rotating annular plate 8 drives the connecting frame 10 to rotate synchronously, the center plate part at the center of the connecting frame 10 drives the rotating shaft 11 to rotate, the rotating rotating shaft 11 drives the stirring rod 14 to rotate synchronously, the rotating stirring rod 14 stirs the high-temperature wastewater, and the high-temperature wastewater flows, so that the temperature stratification phenomenon of the high-temperature wastewater in the heat exchange process is avoided, and the heat exchange effect is improved.

[0023] Please refer to the drawings, the inner wall of the hot water tank 1 is integrally formed with an inner conical surface 13, one end of the inner conical surface 13 close to the water inlet pipe 2 is a narrow end, and the other end of the inner conical surface 13 close to the water outlet pipe 3 is a wide end.

[0024] In the embodiment, after the high-temperature wastewater is heat-exchanged, the temperature of the wastewater gradually decreases, and when the temperature decreases to a threshold value (the temperature can be detected by inserting a temperature sensor, and the temperature sensor needs to be installed on the outer wall of the hot water tank 1 by punching and welding a corresponding mounting flange), the heat-exchanged wastewater is discharged by opening the valve on the water outlet pipe 3, and the high-temperature wastewater and impurities contained therein are discharged outward along the inner conical surface 13, so that the impurities contained in the high-temperature wastewater are prevented from accumulating on the inner wall of the hot water tank 1.

[0025] The above describes only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for recovering heat and power from boiler sewage, comprising a hot water tank (1), characterized in that: One end of the hot water tank (1) is fixedly connected to a water inlet pipe (2), and the other end of the water inlet pipe (2) is fixedly connected to a water outlet pipe (3) below the outer periphery. A heat exchange mechanism penetrating into the interior of the hot water tank (1) is provided on the outside of the hot water tank (1), and a stirring mechanism penetrating into the inner cavity of the hot water tank (1) is installed on one end of the hot water tank (1) close to the water inlet pipe (2). The heat exchange mechanism comprises a heat exchange inlet pipe (4) extending from the bottom of the hot water tank (1) to the inner cavity of the hot water tank (1); the output end of the heat exchange inlet pipe (4) is fixedly connected to a spiral heat exchange pipe (12); the output end of the heat exchange pipe (12) is connected to a heat exchange outlet pipe (5) extending to the outside of the hot water tank (1); and the outside of the heat exchange outlet pipe (5) is wrapped with a heat preservation pipe.

2. The device for recovering heat and power from boiler wastewater according to claim 1, characterized in that: The stirring mechanism comprises a rotating motor (6) mounted on one end of the hot water tank (1) via a mounting bracket, the output end of the rotating motor (6) passing through the inner cavity of the hot water tank (1) and connected to a gear (7), the outer periphery of the gear (7) being meshed with a gear ring (15), and the outer periphery of the gear ring (15) being integrally formed with an annular plate (8).

3. The device for recovering heat and power from boiler wastewater according to claim 2, characterized in that: The stirring mechanism further comprises a rotating ring (9) integrally formed on the outer periphery of the annular plate (8); an annular groove for the rotating ring (9) to rotate is provided on the inner wall of the hot water tank (1); a connecting frame (10) is integrally formed on the inner periphery of the annular plate (8) on one side of the gear ring (15); the center of the connecting frame (10) is aligned with the center of the hot water tank (1); and the thickness of the gear ring (15) and the connecting frame (10) is equal to the thickness of the annular plate (8).

4. The device for recovering heat and power from boiler wastewater according to claim 3, characterized in that: The stirring mechanism further comprises a rotating shaft (11) fixedly connected to one end of the central plate portion of the connecting frame (10), the other end of the rotating shaft (11) being rotatably connected to the end plate of the hot water tank (1), the rotating shaft (11) being located at the center of the hot water tank (1), and a stirring rod (14) being welded to the outer periphery of the rotating shaft (11).

5. The device for recovering heat and power from boiler wastewater according to claim 4, characterized in that: The inner wall of the hot water tank (1) is integrally formed with an inner conical surface (13), the end of the inner conical surface (13) close to the water inlet pipe (2) is a narrow end, and the end of the inner conical surface (13) close to the water outlet pipe (3) is a wide end.

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