Heating and ventilation system for flue gas waste heat recovery

Abstract

The utility model relates to the technical field of heating and ventilation systems, in particular to a heating and ventilation system for flue gas waste heat recovery. In order to solve the problems that after an existing recycling heat supply system is purified, the temperature of flue gas is still too high, and waste heat in the flue gas is inconvenient to recycle due to direct emission, the following technical scheme is provided: the recycling heat supply system comprises a hollow box body; the flow guide plates are arranged in the box body and divide the interior of the box body into an S-shaped flow channel, an air inlet hopper is arranged at the air inlet end of the S-shaped flow channel, an air inlet pipe is installed on the air inlet hopper, an air outlet hopper is arranged at the air outlet end of the S-shaped flow channel, and an air outlet pipe is installed on the air outlet hopper. The air inlet scoop and the air outlet scoop are fixedly connected to the side face of the box body and communicate with the interior of the box body. And multiple groups of heat exchange tubes. According to the utility model, the stroke of the flue gas can be increased, so that the time for exchanging heat with water is greatly prolonged, and the heat in the high-temperature flue gas is effectively and fully utilized.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation and air conditioning (HVAC) system technology, and in particular to an HVAC system for recovering waste heat from flue gas. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) systems are used to control temperature, humidity, and air quality within buildings. They include heating equipment (such as boilers and radiators), ventilation systems (such as fans and air handling units), and air conditioning equipment (such as chillers and cooling towers). These systems work together to provide a comfortable indoor environment and maintain air circulation and temperature stability. In some industrial processes, large amounts of high-temperature flue gas are generated. Directly treating and releasing this flue gas would result in heat loss, preventing the full utilization of energy resources.

[0003] An existing low-temperature flue gas waste heat recovery heating system uses a heat pipe heat exchanger to recover waste heat from low-temperature flue gas to produce hot water for heating, thus replacing the original heating system and achieving energy saving and emission reduction. However, even after purification, the flue gas temperature is still too high, and direct discharge is not conducive to the reuse of waste heat in the flue gas. In view of this, this utility model proposes a flue gas waste heat recovery HVAC system. Utility Model Content

[0004] The purpose of this invention is to address the problem in the background technology that the temperature of flue gas is still too high after purification in existing heat recovery systems, and direct discharge is not convenient for reusing the waste heat in the flue gas. This invention proposes a flue gas waste heat recovery HVAC system.

[0005] The technical solution of this utility model is as follows: A heating and ventilation system for flue gas waste heat recovery includes a hollow housing; multiple sets of guide plates disposed in the housing, which divide the interior of the housing into S-shaped channels; an air inlet hopper is provided at the air inlet end of the S-shaped channel, and an air inlet pipe is installed on the air inlet hopper; an air outlet hopper is provided at the air outlet end of the S-shaped channel, and an air outlet pipe is installed on the air outlet hopper; both the air inlet hopper and the air outlet hopper are fixedly connected to the side of the housing and communicate with the interior of the housing; multiple sets of heat exchange tubes are respectively installed in the multiple sets of guide plates, and the heat exchange tubes are used to transport water; a water inlet box is installed on one side of the housing, which is hollow and communicates with the multiple sets of heat exchange tubes, and an inlet pipe is provided on one side of the water inlet box; and a mixing component is disposed on the side of the housing near the air outlet pipe, which is used to mix the hot water discharged from the multiple sets of heat exchange tubes.

[0006] Optionally, the air inlet hopper is provided with multiple flow dividers.

[0007] Optionally, the mixing assembly includes a mixing pipe disposed on the side of the housing. The mixing pipe is hollow, and the ends of multiple heat exchange tubes away from the water inlet box pass through the housing and are connected to the mixing pipe. A rotating rod is rotatably connected in the mixing pipe, and multiple stirring rods are fixedly connected to the outer ring of the rotating rod.

[0008] Optionally, the top of the rotating rod passes through the mixing pipe and is fixedly connected to a first bevel gear. A protective cover is installed on the top of the mixing pipe. A transmission rod is rotatably connected to the side of the protective cover near the air outlet pipe. A second bevel gear is fixedly connected to one end of the transmission rod, and the first bevel gear meshes with the second bevel gear.

[0009] Optionally, the end of the transmission rod away from the second bevel gear extends into the air outlet pipe and is fixedly connected to multiple sets of arc-shaped plates, with a clearance cover installed at the bottom of the air outlet pipe below the arc-shaped plates.

[0010] Optionally, both the air inlet hopper and the air outlet hopper are cone-shaped.

[0011] Optionally, the heat exchange tubes are arranged in a serpentine pattern.

[0012] Optionally, a temporary storage box is connected to the side of the mixing pipe via a pipe. The temporary storage box is installed on the side of the box body, and a water outlet pipe is also provided on the side of the temporary storage box.

[0013] In summary, this application includes at least one of the following beneficial technical effects:

[0014] This utility model, through the setting of the guide plate, makes the travel path of flue gas in the box longer, so that when the flue gas flows, it can fully contact the heat exchange tube, thereby heating the water in the heat exchange tube and making full use of energy.

[0015] Furthermore, by setting up the mixing components, after the water in different heat exchange tubes is discharged into the mixing pipe, the water temperature will also be different due to the different positions of the heat exchange tubes. When the flue gas is discharged, it drives the arc plate to rotate, thereby causing the stirring rod to rotate and making the water mix evenly, thus achieving uniform temperature distribution and increasing the comfort of the HVAC system.

[0016] In summary, this invention can increase the travel distance of the flue gas, thereby greatly increasing the heat exchange time with water, and thus effectively making full use of the heat in the high-temperature flue gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a heating, ventilation, and air conditioning system that recovers waste heat from flue gas.

[0018] Figure 2 This is a schematic diagram of the air intake duct;

[0019] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0020] Figure 4 yes Figure 1 A cross-sectional view;

[0021] Figure 5 This is a cross-sectional structural diagram of the hybrid component.

[0022] Figure label:

[0023] 1. Housing; 2. Baffle plate;

[0024] 3. Air inlet duct; 31. Air inlet pipe; 32. Flow divider;

[0025] 4. Air outlet duct; 41. Air outlet pipe;

[0026] 5. Heat exchanger tube; 6. Water inlet box; 61. Water inlet pipe;

[0027] 7. Mixing assembly; 71. Mixing pipe; 72. Rotating rod; 73. Stirring rod; 74. First bevel gear; 75. Protective cover; 76. Transmission rod; 77. Second bevel gear; 78. Arc plate; 79. Clearance cover;

[0028] 8. Temporary storage box; 81. Water outlet pipe. Detailed Implementation

[0029] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0030] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0031] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example

[0035] like Figures 1-3 As shown, this utility model proposes a flue gas waste heat recovery HVAC system, including a hollow housing 1 and four sets of guide plates 2 disposed within the housing 1. The four sets of guide plates 2 divide the interior of the housing 1 into S-shaped flow channels, facilitating the increase of the flue gas movement path and thus improving the heat exchange time. Furthermore, more guide plates 2 can be installed to lengthen the flue gas flow path, resulting in a lower temperature of the flue gas after heat exchange. An air inlet hopper 3 is provided at the air inlet end of the S-shaped flow channel, and an air inlet pipe 31 is installed on the air inlet hopper 3, through which flue gas is injected into the housing 1. Multiple sets of flow plates 32 are provided in the air inlet hopper 3, ensuring uniform dispersion of the flue gas upon initial entry into the housing 1, guaranteeing the heat exchange effect of the water in the heat exchange tubes 5 closest to the air inlet pipe 31. An air outlet hopper 4 is provided at the air outlet end of the S-shaped flow channel, and an air outlet pipe 41 is installed on the air outlet hopper 4, through which the cooled flue gas is discharged. Both the inlet hopper 3 and the outlet hopper 4 are conical in shape to facilitate the diffusion and concentration of flue gas. Both the inlet hopper 3 and the outlet hopper 4 are fixedly connected to the side of the housing 1 and communicate with the interior of the housing 1. At the same time, the bottom of the housing 1 is also provided with a drain hole and a rubber plug to facilitate the drainage of condensate in the housing 1.

[0036] For further details, please refer to Figure 4The aforementioned HVAC system includes four sets of heat exchange pipes 5, each installed within a set of four guide plates 2. Water is transported through the heat exchange pipes 5, which are arranged in a serpentine pattern to increase the water flow path and thus improve the contact area during heat exchange, resulting in better heat exchange performance. A hollow water inlet box 6 is installed on one side of the housing 1 and connects to multiple sets of heat exchange pipes 5. A water inlet pipe 61 is located on one side of the water inlet box 6, facilitating the connection of the water in the four sets of heat exchange pipes 5 into a single unit. This allows water to be simultaneously supplied to all four sets of heat exchange pipes 5 after the water inlet box 6 is filled through the water inlet pipe 61. Furthermore, in operation, the housing 1 is tilted, with the water inlet box 6 located at the top or bottom of the housing 1, facilitating the simultaneous supply of water to the four sets of heat exchange pipes 5.

[0037] Furthermore, such as Figure 5 As shown, the aforementioned HVAC system also includes a mixing component 7 located on the side of the housing 1 near the air outlet duct 41. The mixing component 7 is used to mix the hot water discharged from multiple sets of heat exchange tubes 5 to prevent the output hot water from fluctuating in temperature, which would affect the user experience. The mixing component 7 includes a mixing pipe 71 located on the side of the housing 1. The mixing pipe 71 is hollow. The ends of the four sets of heat exchange tubes 5 away from the water inlet box 6 pass through the housing 1 and are connected to the mixing pipe 71. The water in the four sets of heat exchange tubes 5 reaches the mixing pipe 71 after heat exchange. Because the four sets of heat exchange tubes 5 are located in different positions in the housing 1, the temperature of the flue gas when it comes into contact with each set of heat exchange tubes 5 is also different. Consequently, the water temperature discharged from each set of heat exchange tubes 5 is different, resulting in uneven water temperature in the mixing pipe 71. A rotating rod 72 is rotatably connected to the mixing pipe 71. Multiple stirring rods 73 are fixedly connected to the outer ring of the rotating rod 72. When the rotating rod 72 rotates, it drives the stirring rods 73 to rotate, thereby stirring the water in the mixing pipe 71, ensuring uniform heat distribution and a comfortable user experience for the water discharged directly from the mixing pipe 71 through the pipe. A first bevel gear 74 is fixedly connected to the top of the rotating rod 72 through the mixing pipe 71. A protective cover 75 is installed on the top of the mixing pipe 71, serving both protective and fixing functions. A transmission rod 76 is rotatably connected to the side of the protective cover 75 near the air outlet pipe 41, and the transmission rod 76 rotates while remaining in its original position. A second bevel gear 77 is fixedly connected to one end of the transmission rod 76. The first bevel gear 74 meshes with the second bevel gear 77. When the transmission rod 76 rotates, it drives the second bevel gear 77 to rotate, and simultaneously, the second bevel gear 77 drives the first bevel gear 74 to rotate, thus causing the rotating rod 72 to rotate. The end of the transmission rod 76 away from the second bevel gear 77 extends into the air outlet pipe 41 and is fixedly connected to multiple sets of arc-shaped plates 78. Below the arc-shaped plates 78, there is a clearance cover 79 installed at the bottom of the air outlet pipe 41, which makes it easy for the flue gas to blow the arc-shaped plates 78 when it is discharged through the air outlet pipe 41, so that the transmission rod 76 starts to rotate, thereby driving the rotating rod 72 and the stirring rod 73 to rotate, avoiding the use of a motor drive and saving energy.

[0038] A temporary storage tank 8 is connected to the side of the mixing pipe 71 via a pipe. The temporary storage tank 8 is installed on the side of the tank body 1. A water outlet pipe 81 is also provided on the side of the temporary storage tank 8. The temporary storage tank 8 is used to temporarily store the mixed water, and at the same time, it allows the water to be further mixed to ensure that the water temperature is completely uniform.

[0039] In this embodiment, firstly, the housing 1 is tilted down, and the four sets of guide plates 2 are in a vertical position. At this time, flue gas is introduced into the air inlet pipe 31, and the flue gas flows in an S-shape formed by the four sets of guide plates 2. Simultaneously, water is injected into the water inlet box 6 through the water inlet pipe 61, and the water enters the four sets of heat exchange tubes 5 at the same time. When the flue gas moves, it comes into contact with the heat exchange tubes 5, transferring heat to the water in the heat exchange tubes 5, and the flue gas temperature decreases. The flue gas is discharged at a lower temperature through the air outlet pipe 41. At the same time, the heated water in the heat exchange tubes 5 enters the mixing pipe 71, and when the flue gas passes through the air outlet pipe 41, it blows the arc plate 78, which drives the transmission rod 76 to rotate. When the transmission rod 76 rotates, it drives the second bevel gear 77 to mesh with the first bevel gear 74, so that the rotating rod 72 rotates synchronously, and drives the stirring rod 73 to rotate to stir the uneven water, ensuring that the water temperature in the mixing pipe 71 is uniform, so that the hot water output from the mixing pipe 71 is uniform, which can improve the comfort during use.

[0040] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A heating, ventilation, and air conditioning system for recovering waste heat from flue gas, characterized in that, include: A hollow box (1); Multiple sets of guide plates (2) are installed in the box (1). The multiple sets of guide plates (2) divide the interior of the box (1) into S-shaped flow channels. An air inlet hopper (3) is provided at the air inlet end of the S-shaped flow channel. An air inlet pipe (31) is installed on the air inlet hopper (3). An air outlet hopper (4) is provided at the air outlet end of the S-shaped flow channel. An air outlet pipe (41) is installed on the air outlet hopper (4). The air inlet hopper (3) and the air outlet hopper (4) are both fixedly connected to the side of the box (1) and communicate with the interior of the box (1). Multiple sets of heat exchange tubes (5) are installed in multiple sets of guide plates (2), and the heat exchange tubes (5) are used to transport water. A water inlet box (6) is installed on one side of the housing (1). The water inlet box (6) is hollow and connected to multiple heat exchange tubes (5). A water inlet pipe (61) is provided on one side of the water inlet box (6). A mixing component (7) is installed on the side of the housing (1) near the air outlet pipe (41). The mixing component (7) is used to mix the hot water discharged from multiple sets of heat exchange tubes (5).

2. The HVAC system for flue gas waste heat recovery according to claim 1, characterized in that, The air inlet hopper (3) is provided with multiple flow plates (32).

3. The HVAC system for flue gas waste heat recovery according to claim 1, characterized in that, The mixing component (7) includes a mixing pipe (71) disposed on the side of the housing (1). The mixing pipe (71) is hollow. The ends of the multiple heat exchange tubes (5) away from the water inlet box (6) pass through the housing (1) and are connected to the mixing pipe (71). A rotating rod (72) is rotatably connected in the mixing pipe (71). Multiple stirring rods (73) are fixedly connected to the outer ring of the rotating rod (72).

4. The HVAC system for flue gas waste heat recovery according to claim 3, characterized in that, The top of the rotating rod (72) passes through the mixing pipe (71) and is fixedly connected to the first bevel gear (74). The top of the mixing pipe (71) is equipped with a protective cover (75). The protective cover (75) is rotatably connected to a transmission rod (76) on the side near the air outlet pipe (41). One end of the transmission rod (76) is fixedly connected to a second bevel gear (77). The first bevel gear (74) meshes with the second bevel gear (77).

5. The HVAC system for flue gas waste heat recovery according to claim 4, characterized in that, The end of the transmission rod (76) away from the second bevel gear (77) extends into the air outlet pipe (41) and is fixedly connected to multiple sets of arc plates (78). A clearance cover (79) installed at the bottom of the air outlet pipe (41) is provided below the arc plate (78).

6. The HVAC system for flue gas waste heat recovery according to claim 1, characterized in that, Both the air inlet hopper (3) and the air outlet hopper (4) are cone-shaped.

7. The HVAC system for flue gas waste heat recovery according to claim 1, characterized in that, The heat exchange tube (5) is arranged in a serpentine pattern.

8. The HVAC system for flue gas waste heat recovery according to claim 3, characterized in that, The side of the mixing pipe (71) is connected to a temporary storage box (8) via a pipe. The temporary storage box (8) is installed on the side of the box body (1). The side of the temporary storage box (8) is also provided with a water outlet pipe (81).

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