Exhaust smoke waste heat recycling device of gas-fired boiler

Abstract

The utility model discloses a gas-fired boiler exhaust smoke waste heat recycling device which comprises a device outer shell, a heat exchange liquid inlet connecting pipe is fixedly arranged at one end of the upper portion of the device outer shell in a penetrating mode, a heat exchange liquid outlet connecting pipe is fixedly arranged at one end of the lower portion of the device outer shell in a penetrating mode, and a middle partition plate is fixedly connected to the interior of the device outer shell. Cold water enters the liquid inlet preheating collection tank through the heat exchange liquid inlet connecting pipe to be preheated, exchanges heat with high-temperature flue gas through the multiple groups of long flue gas heat exchange pipes, the middle flue gas heat exchange pipes and the short flue gas heat exchange pipes, then flows into the liquid outlet collection tank to be collected, and finally is discharged through the heat exchange liquid outlet connecting pipe, so that waste heat of the flue gas can be recycled. Flue gas can penetrate through first vent hole grooves and second vent hole grooves in the peripheries and the interiors of the liquid inlet preheating collection tank and the liquid outlet collection tank when advancing in the device outer shell, in this way, the contact area between the flue gas and the flue gas can be increased, heat exchange is effectively conducted, and the heat exchange effect can be further improved compared with single-face contact flue gas at a traditional heat exchange water flow collection position.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery equipment, in particular to a gas boiler exhaust waste heat recovery and reuse device. Background Art

[0002] A gas boiler is a heating device that uses gas as fuel. It generates heat by burning gas and then transfers the heat to water or steam to heat a house or provide hot water. A gas boiler is usually composed of a gas burner, combustion chamber, heat exchanger, water circulation system and control system.

[0003] In a gas boiler, gas is mixed with air and ignited in a combustion chamber to produce high-temperature combustion gas. The flue gas after combustion in the combustion chamber still has a certain amount of heat. When discharged, the waste heat can be further recovered through a waste heat recovery device for more energy-saving and environmentally friendly utilization. However, the existing gas boiler exhaust waste heat recovery and reuse devices have poor heat exchange effects on flue gas waste heat and low recovery efficiency when in use. Utility Model Content

[0004] The purpose of the utility model is to provide a gas boiler exhaust waste heat recovery and reuse device in order to solve the problem that the existing gas boiler exhaust waste heat recovery and reuse device has poor heat exchange effect and low recovery efficiency for flue gas waste heat when in use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas boiler exhaust waste heat recovery and reuse device, comprising: an external shell of the device, a heat exchange liquid inlet connecting pipe is fixedly penetrated at one upper end of the external shell of the device, a heat exchange liquid outlet connecting pipe is fixedly penetrated at one lower end of the external shell of the device, an intermediate partition plate is fixedly connected to the inside of the external shell of the device, a liquid inlet preheating collecting tank is arranged at the upper part of the internal part of the external shell of the device, a liquid outlet collecting tank is arranged at the lower part of the internal part of the external shell of the device, a vent hole groove 1 is opened at one end of the internal part of the liquid inlet preheating collecting tank, a vent hole groove 2 is opened at one end of the internal part of the liquid outlet collecting tank, a long flue gas heat exchange pipe is penetrated and fixedly connected at the upper part of the side of the liquid inlet preheating collecting tank, a medium flue gas heat exchange pipe is penetrated and fixedly connected at the middle part of the side of the liquid inlet preheating collecting tank, and a short flue gas heat exchange pipe is penetrated and fixedly connected at the lower part of the side of the liquid inlet preheating collecting tank.

[0006] As a further solution of the utility model: an inlet pipe through hole is opened at the upper end of the outer shell of the device, and a liquid outlet pipe through hole is opened at the lower end of the outer shell of the device. The heat exchange liquid inlet connecting pipe passes through the liquid inlet pipe through hole and is fixedly connected to the liquid inlet preheating collecting tank, and the heat exchange liquid outlet connecting pipe passes through the liquid outlet pipe through hole and is fixedly connected to the liquid outlet collecting tank.

[0007] As a further solution of the utility model: a smoke exhaust bellows is fixedly connected to the upper side of the other end of the outer shell of the device, and a smoke inlet bellows is fixedly connected to the lower side of the other end of the outer shell of the device.

[0008] As a further solution of the utility model: the number of the vent slots 1 and vent slots 2 are both provided in two groups, the liquid inlet preheating collecting tank and the liquid outlet collecting tank are both fixed to the upper and lower ends of the middle partition plate inside the external shell of the device by brackets and there are gaps all around.

[0009] As a further solution of the utility model: the long flue gas heat exchange tubes, the medium flue gas heat exchange tubes and the short flue gas heat exchange tubes are each provided with multiple groups and are arranged inside the external shell of the device, and the long flue gas heat exchange tubes, the medium flue gas heat exchange tubes and the short flue gas heat exchange tubes are each provided with multiple groups and their two ends are respectively passed through and fixedly connected to the liquid preheating collecting tank and the liquid outlet collecting tank.

[0010] As a further solution of the utility model: the smoke exhaust bellows passes through the upper part of the fixed inner part of the outer shell of the device and the middle partition plate, and the smoke entry bellows passes through the lower part of the fixed inner part of the outer shell of the device and the middle partition plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, cold water enters the liquid inlet preheating collecting tank through the heat exchange liquid inlet connecting pipe for preheating, and after heat exchange with the high-temperature flue gas through multiple groups of long flue gas heat exchange tubes, medium flue gas heat exchange tubes and short flue gas heat exchange tubes, flows into the liquid outlet collecting tank for collection, and is finally discharged through the heat exchange liquid outlet connecting pipe to complete the waste heat recovery and reuse of the flue gas. When the flue gas travels in the external shell of the device, it passes through the four sides of the liquid inlet preheating collecting tank and the liquid outlet collecting tank as well as the internal vent slot 1 and vent slot 2, which can increase the contact area with the flue gas for effective heat exchange, and can further improve the heat exchange effect compared with the single-sided contact with the flue gas at the traditional water flow collection point. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of a gas boiler exhaust waste heat recovery and reuse device described in the utility model;

[0014] Figure 2 It is a cross-sectional structural diagram of a gas boiler exhaust waste heat recovery and reuse device described in the utility model;

[0015] Figure 3 It is a structural schematic diagram of a heat exchange mechanism in a gas boiler exhaust waste heat recovery and reuse device described in the utility model;

[0016] Figure 4It is a schematic cross-sectional structure diagram of an external shell of a device in a gas boiler exhaust waste heat recovery and reuse device described in the utility model.

[0017] In the figure: 1. External shell of the device; 2. Heat exchange liquid inlet connecting pipe; 3. Heat exchange liquid outlet connecting pipe; 4. Middle partition plate; 5. Liquid inlet preheating collecting tank; 6. Liquid outlet collecting tank; 7. Vent slot one; 8. Vent slot two; 9. Long flue gas heat exchange tube; 10. Medium flue gas heat exchange tube; 11. Short flue gas heat exchange tube; 12. Liquid inlet pipe through hole; 13. Liquid outlet pipe through hole; 14. Smoke discharge bellows; 15. Smoke enters bellows. DETAILED DESCRIPTION

[0018] 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.

[0019] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following is an explanation of the embodiments of the present utility model based on the overall structure of the present utility model.

[0020] Reference Figures 1 to 3In an embodiment of the utility model, a gas boiler exhaust waste heat recovery and reuse device comprises: an external shell 1 of the device, a heat exchange liquid inlet connecting pipe 2 is fixedly penetrated at one end above the external shell 1 of the device, a heat exchange liquid outlet connecting pipe 3 is fixedly penetrated at one end below the external shell 1 of the device, an intermediate partition plate 4 is fixedly connected to the inside of the external shell 1 of the device, a liquid inlet preheating collecting tank 5 is arranged at the top of the internal part of the external shell 1 of the device, a liquid outlet collecting tank 6 is arranged at the bottom of the internal part of the external shell 1 of the device, a vent hole groove 1 7 is opened at one end inside the liquid inlet preheating collecting tank 5, a vent hole groove 2 8 is opened at one end inside the liquid outlet collecting tank 6, and the number of vent hole grooves 1 7 and vent hole grooves 2 8 are both provided in two groups, and the liquid inlet preheating collecting tank 5 is provided in two groups. The and liquid outlet collecting tanks 6 are fixed to the upper and lower ends of the middle partition plate 4 inside the external shell 1 of the device through brackets and have gaps on all sides. A long flue gas heat exchange tube 9 is fixedly connected to the upper side of the liquid inlet preheating collecting tank 5, a medium flue gas heat exchange tube 10 is fixedly connected to the middle side of the liquid inlet preheating collecting tank 5, and a short flue gas heat exchange tube 11 is fixedly connected to the lower side of the liquid inlet preheating collecting tank 5. The long flue gas heat exchange tube 9, the medium flue gas heat exchange tube 10 and the short flue gas heat exchange tube 11 are all arranged in multiple groups and are arranged inside the external shell 1 of the device, and the long flue gas heat exchange tube 9, the medium flue gas heat exchange tube 10 and the short flue gas heat exchange tube 11 are all arranged in multiple groups and have their ends respectively passed through and fixedly connected to the liquid inlet preheating collecting tank 5 and the liquid outlet collecting tank 6.

[0021] Reference Figure 1 , Figure 2 and Figure 4 A liquid inlet pipe through hole 12 is opened at the upper end of the external shell 1 of the device, and a liquid outlet pipe through hole 13 is opened at the lower end of the external shell 1 of the device. The heat exchange liquid inlet connecting pipe 2 passes through the liquid inlet pipe through hole 12 and is fixedly connected to the liquid inlet preheating collecting tank 5. The heat exchange liquid outlet connecting pipe 3 passes through the liquid outlet pipe through hole 13 and is fixedly connected to the liquid outlet collecting tank 6.

[0022] Reference Figure 1 , Figure 2 and Figure 4 A smoke exhaust bellows 14 is fixedly connected to the upper side of the other end of the device external shell 1, and a smoke intake bellows 15 is fixedly connected to the lower side of the other end of the device external shell 1. The smoke exhaust bellows 14 passes through the upper part of the internal connection where the device external shell 1 and the middle partition plate 4 are fixed, and the smoke intake bellows 15 passes through the lower part of the internal connection where the device external shell 1 and the middle partition plate 4 are fixed.

[0023] The working principle of the utility model is as follows: when in use, first connect the liquid inlet pipe to the heat exchange liquid inlet connecting pipe 2, connect the liquid outlet pipe to the heat exchange liquid outlet connecting pipe 3, connect the smoke exhaust pipe to the smoke exhaust bellows 14, connect the boiler smoke exhaust pipe to the smoke inlet bellows 15, the device outer shell 1 is divided into a U-shaped structure cavity by the middle partition plate 4, the high-temperature smoke after combustion in the boiler enters the lower part of the middle partition plate 4 inside the device outer shell 1 through the smoke inlet bellows 15, and goes forward to the gap between the middle partition plate 4 and the device outer shell 1, and finally is discharged from the smoke exhaust bellows 14. At this time, cold water enters the liquid inlet preheating collecting tank 5 through the heat exchange liquid inlet connecting pipe 2 for preheating, and then flows into the liquid outlet collecting tank 6 for collection after heat exchange with the high-temperature flue gas through multiple groups of long flue gas heat exchange tubes 9, medium flue gas heat exchange tubes 10 and short flue gas heat exchange tubes 11, and is finally discharged through the heat exchange liquid outlet connecting pipe 3 to complete the waste heat recovery and reuse of the flue gas. When the flue gas travels in the external shell 1 of the device, it will pass through the four sides of the liquid inlet preheating collecting tank 5 and the liquid outlet collecting tank 6, as well as the internal vent slot 1 7 and vent slot 2 8, so that the contact area with the flue gas can be increased for effective heat exchange, and the heat exchange effect can be further improved compared with the single-sided contact with the flue gas at the traditional water flow collection point of the heat exchanger.

[0024] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas boiler exhaust waste heat recovery and reuse device, characterized in that: include: An external shell (1) of the device, wherein a heat exchange liquid inlet connecting pipe (2) is fixedly penetrated at one end of the upper part of the external shell (1), a heat exchange liquid outlet connecting pipe (3) is fixedly penetrated at one end of the lower part of the external shell (1), an intermediate partition plate (4) is fixedly connected inside the external shell (1), a liquid inlet preheating collecting tank (5) is arranged at the upper part of the internal part of the external shell (1), a liquid outlet collecting tank (6) is arranged at the lower part of the internal part of the external shell (1), a vent hole groove 1 (7) is provided at one end of the internal part of the liquid inlet preheating collecting tank (5), a vent hole groove 2 (8) is provided at one end of the internal part of the liquid outlet collecting tank (6), a long flue gas heat exchange pipe (9) is penetrated and fixedly connected at the upper part of the side of the liquid inlet preheating collecting tank (5), a medium flue gas heat exchange pipe (10) is penetrated and fixedly connected at the middle part of the side of the liquid inlet preheating collecting tank (5), and a short flue gas heat exchange pipe (11) is penetrated and fixedly connected at the lower part of the side of the liquid inlet preheating collecting tank (5).

2. A gas boiler exhaust waste heat recovery and reuse device according to claim 1, characterized in that: A liquid inlet pipe through hole (12) is provided at one upper end of the device outer shell (1), and a liquid outlet pipe through hole (13) is provided at one lower end of the device outer shell (1); the heat exchange liquid inlet connecting pipe (2) passes through the liquid inlet pipe through hole (12) and is connected to the liquid inlet preheating collecting tank (5); and the heat exchange liquid outlet connecting pipe (3) passes through the liquid outlet pipe through hole (13) and is connected to the liquid outlet collecting tank (6).

3. The gas boiler exhaust waste heat recovery and reuse device according to claim 1, characterized in that: A smoke exhaust bellows (14) is fixedly connected to the upper side of the other end of the device outer shell (1), and a smoke intake bellows (15) is fixedly connected to the lower side of the other end of the device outer shell (1).

4. The gas boiler exhaust waste heat recovery and reuse device according to claim 1, characterized in that: The number of the first vent hole slot (7) and the number of the second vent hole slot (8) are both two groups, and the liquid inlet preheating collection tank (5) and the liquid outlet collection tank (6) are both fixed to the upper and lower ends of the middle partition plate (4) inside the outer shell (1) of the device through brackets and have gaps on all sides.

5. The gas boiler exhaust waste heat recovery and reuse device according to claim 1, characterized in that: The long flue gas heat exchange tubes (9), the medium flue gas heat exchange tubes (10) and the short flue gas heat exchange tubes (11) are arranged in a plurality of groups and are located inside the outer shell (1) of the device, and the long flue gas heat exchange tubes (9), the medium flue gas heat exchange tubes (10) and the short flue gas heat exchange tubes (11) are arranged in a plurality of groups and have their two ends respectively penetrated and fixedly connected to the liquid inlet preheating assembly tank (5) and the liquid outlet assembly tank (6).

6. The gas boiler exhaust waste heat recovery and reuse device according to claim 3 is characterized in that: The smoke exhaust bellows (14) passes through the upper interior where the device outer shell (1) and the middle partition plate (4) are fixedly connected, and the smoke intake bellows (15) passes through the lower interior where the device outer shell (1) and the middle partition plate (4) are fixedly connected.

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