Combined heat and power generation waste heat recovery device

Abstract

The utility model provides a combined heat and power generation waste heat recovery device which comprises a waste heat recovery device body, the waste heat recovery device body comprises a recovery channel, a water injection assembly and a medium conveying assembly, and a combined heat and power generation smoke input pipeline is arranged at the front end of the recovery channel. The other end of the recycling channel is connected with a combined heat and power generation smoke discharging pipeline, a water injection assembly is arranged at one end of the top of the recycling channel, and the interior of the recycling channel communicates with the interior of a medium conveying assembly; according to the combined heat and power generation waste heat recovery device, the fluid channel, the smoke flow guide interlayer and the air channel are arranged in the recovery channel, high-temperature smoke flows in the flat smoke flow guide interlayer, the heat exchange area is enlarged, the waste heat recovery efficiency is improved, and the heat utilization effect is improved; and two different heat recovery media are provided, the heat preservation effect of hot water generated after heat recovery is enhanced, and heat loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy utilization, in particular to a cogeneration waste heat recovery device. Background Art

[0002] Cogeneration is an efficient, energy-saving and environmentally friendly way of utilizing energy. The high-temperature smoke generated during cogeneration carries a large amount of heat. Recovering the heat of this part of the smoke can improve energy utilization. According to the prior art, such as the flue gas waste heat recovery device for cogeneration described in Chinese patent document CN202220349235.1, the disclosed technical solution realizes graded recovery and utilization of waste heat by transferring the waste heat in the flue gas to water for storage, making full use of the heat, avoiding secondary waste of waste heat, and improving the waste heat recovery efficiency.

[0003] According to the technical solution disclosed by the invention, the cogeneration waste heat recovery device in the prior art directly allows the high-temperature smoke generated in the cogeneration process to flow inside the liquid medium to achieve the heating effect on the liquid. However, the smoke at the center of the smoke pipe in the process cannot fully transfer the heat to the outside, so the waste heat recovery is not comprehensive and can only provide a single waste heat recovery method, which can easily cause the recovered heat to dissipate into the air due to thermal radiation. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a cogeneration waste heat recovery device to solve the problems raised in the above-mentioned background technology. The utility model improves the recovery efficiency of high-temperature smoke and can provide a variety of recovery forms, thereby slowing down the cooling rate of the fluid medium after heat recovery.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a cogeneration waste heat recovery device, including a waste heat recovery device body, the waste heat recovery device body includes a recovery channel, a water injection component and a medium conveying component, the front end of the recovery channel is provided with a cogeneration smoke input pipe, the other end of the recovery channel is connected to the cogeneration smoke exhaust pipe, the top end of the recovery channel is provided with a water injection component, and the interior of the recovery channel is connected to the interior of the medium conveying component.

[0006] Furthermore, a fluid channel, a smoke guide interlayer and an air channel are arranged inside the recovery channel, the fluid channel is arranged on the top of the smoke guide interlayer, and the air channel is arranged on the bottom of the smoke guide interlayer.

[0007] Furthermore, heat-conducting baffles are provided inside the fluid channel and the air channel, an air inlet is installed at one end of the fluid channel, and a guide fan is installed inside the air inlet.

[0008] Furthermore, the guide fan blows air from the outside into the interior of the fluid channel, and middle partitions are provided on the top and bottom of the smoke guide interlayer, and the middle partition above the smoke guide interlayer is in an inclined state, and the two ends of the interior of the smoke guide interlayer are respectively connected to the cogeneration smoke input pipe and the cogeneration smoke exhaust pipe.

[0009] Furthermore, the water injection assembly includes a water injection pipe and a diversion pipe, the front end of the water injection pipe is provided with a docking port, and the diversion pipe is arranged at the bottom of the water injection pipe.

[0010] Furthermore, the diversion pipe penetrates downward from the top of the recovery channel into the interior of the fluid channel, and the end of each diversion pipe is inserted into the middle of the two heat-conducting partitions.

[0011] Furthermore, the medium transport component includes a fluid recovery pipe and a heating recovery pipe, the top of the fluid recovery pipe is connected to the inside of the fluid channel through a first collecting channel, and the heating recovery pipe is connected to the air channel through a second collecting channel at the top.

[0012] Furthermore, the fluid recovery pipe is inserted into the middle position of the heating recovery pipe, a discharge channel is installed on one side of the bottom of the heating recovery pipe, and a docking flange is provided at the bottom of the fluid recovery pipe.

[0013] Beneficial effects of the utility model:

[0014] 1. The cogeneration waste heat recovery device is provided with a fluid channel, a smoke guide interlayer and an air channel inside the recovery channel. By making the high-temperature smoke flow inside the flat smoke guide interlayer and conducting the heat of the high-temperature smoke toward the top and the bottom, the heat exchange area is expanded, the waste heat recovery efficiency is improved, and the heat utilization effect is improved.

[0015] 2. The cogeneration waste heat recovery device allows the fluid medium to flow inside the fluid channel at the top, and cooperates with the water injection component to make the water flow evenly diffuse inside the fluid channel, thereby improving the uniformity of heat exchange and further improving the heat recovery efficiency.

[0016] 3. The cogeneration waste heat recovery device is connected to the medium conveying assembly at the ends of the fluid channel and the air channel. In this structure, the fluid recovery pipeline can flow downward in the middle position of the heating recovery pipeline, thereby providing two different heat recovery media, improving the insulation effect of hot water, and reducing heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic structural diagram of the appearance of a heat and power cogeneration waste heat recovery device of the utility model;

[0018] Figure 2 It is a cross-sectional view of the recycling channel of the utility model;

[0019] Figure 3 It is a cross-sectional view of the top of the medium conveying component of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the medium conveying component part of the utility model;

[0021] In the figure: 1. Recovery channel; 2. Cogeneration smoke input pipe; 3. Cogeneration smoke exhaust pipe; 4. Air inlet; 5. Water injection assembly; 6. Medium conveying assembly; 7. Fluid channel; 8. Smoke diversion interlayer; 9. Air channel; 10. Heat-conducting baffle; 11. Middle baffle; 12. Docking port; 13. Water injection pipe; 14. Diversion pipe; 15. First collecting channel; 16. Second collecting channel; 17. Fluid recovery pipe; 18. Heating recovery pipe; 19. Discharge channel; 20. Docking flange; 21. Diversion fan. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figures 1 to 4 The utility model provides a technical solution: a cogeneration waste heat recovery device, including a waste heat recovery device body, the waste heat recovery device body includes a recovery channel 1, a water injection component 5 and a medium conveying component 6, the front end of the recovery channel 1 is provided with a cogeneration smoke input pipe 2, the other end of the recovery channel 1 is connected to the cogeneration smoke exhaust pipe 3, the top end of the recovery channel 1 is provided with a water injection component 5, the interior of the recovery channel 1 is connected with the interior of the medium conveying component 6, the cogeneration waste heat recovery device allows the high-temperature smoke generated in the cogeneration process to enter the recovery channel 1 along the cogeneration smoke input pipe 2, and inputs cold water from the water injection component 5 into the top space of the recovery channel 1, and inputs cold air into the bottom space of the recovery channel 1 by means of the air inlet 4, so that the waste heat in the cogeneration smoke is exchanged inside the recovery channel 1 to achieve the recovery effect, and finally the medium after heat recovery is discharged from the medium conveying component 6.

[0024] In this embodiment, the recovery channel 1 is provided with a fluid channel 7, a smoke guide interlayer 8 and an air channel 9. The fluid channel 7 is arranged at the top of the smoke guide interlayer 8, and the air channel 9 is arranged at the bottom of the smoke guide interlayer 8. Heat-conducting baffles 10 are arranged inside the fluid channel 7 and the air channel 9. An air inlet 4 is installed at one end of the fluid channel 7. A guide fan 21 is installed inside the air inlet 4. The guide fan 21 blows air from the outside into the fluid channel 7. A middle baffle 11 is arranged at the top and bottom of the smoke guide interlayer 8, and the middle baffle 11 above the smoke guide interlayer 8 is in an inclined state. The two ends of the smoke guide interlayer 8 are respectively connected to the cogeneration smoke input pipe 2 and the cogeneration smoke exhaust pipe 3. A fluid channel 7, a smoke guide interlayer 8 and an air channel 9 are arranged inside the recovery channel 1. By making the high-temperature smoke flow inside the flat smoke guide interlayer 8 and conducting the heat of the high-temperature smoke itself toward the top and the bottom, the heat exchange area is expanded, the efficiency of waste heat recovery is improved, and the heat utilization effect is improved. Specifically, the cogeneration smoke flows from one end of the smoke guide interlayer 8 to the other end, and during the flow, it is conducted through the middle partition 11 and the upper and lower heat-conducting partitions 10, so that the heat is evenly diffused into the fluid channel 7 and the air channel 9, and the heat exchange process is completed inside the two channels.

[0025] In this embodiment, the water injection assembly 5 includes a water injection pipe 13 and a diversion pipe 14. The front end of the water injection pipe 13 is provided with a docking port 12. The diversion pipe 14 is arranged at the bottom of the water injection pipe 13. The diversion pipe 14 penetrates downward from the top of the recovery channel 1 into the interior of the fluid channel 7, and the end of each diversion pipe 14 is inserted into the middle of the two heat-conducting partitions 10. The fluid medium is made to flow inside the fluid channel 7 at the top, and the water injection component 5 is used to make the water flow evenly diffuse inside the fluid channel 7, thereby improving the uniformity of heat exchange and further improving the heat recovery efficiency. Specifically, cold water is injected into the water injection pipe 13 from the docking port 12, and then evenly enters between the two adjacent heat-conducting baffles 10 inside the fluid channel 7 along the diversion pipe 14, and is released from the side heat-conducting baffles 10 and the bottom middle baffle 11 in an independent flow path to complete the heat exchange process of the cogeneration smoke. After the cold air is blown into the air channel 9 at the bottom through the guide fan 21, the heat recovery process can be completed with the help of the baffle to form warm air.

[0026] In this embodiment, the medium conveying component 6 includes a fluid recovery pipe 17 and a heating recovery pipe 18. The top of the fluid recovery pipe 17 is connected to the interior of the fluid channel 7 through a first collecting channel 15, and the heating recovery pipe 18 is connected to the air channel 9 through a second collecting channel 16 at the top. The fluid recovery pipe 17 is inserted into the middle position of the heating recovery pipe 18, and a discharge channel 19 is installed on one side of the bottom of the heating recovery pipe 18. A docking flange 20 is provided at the bottom of the fluid recovery pipe 17. The ends of the fluid channel 7 and the air channel 9 are connected to the medium conveying component 6. In this structure, the fluid recovery pipe 17 can flow downward in the middle position of the heating recovery pipe 18, thereby providing two different heat recovery media, improving the insulation effect of hot water, and reducing heat loss. Specifically, the cold water forms hot water after the waste heat recovery is completed, and the hot water enters the fluid recovery pipe 17 through the first collecting channel 15 at the end, and the heating enters the heating recovery pipe 18 through the first collecting pipe. When the fluid recovery pipe 17 flows in the heating recovery pipe 18, it can provide additional insulation effect through the outer layer of heating until it is connected to the external hot water receiving device from the bottom docking flange 20.

[0027] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. 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 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 defined 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. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A waste heat recovery device for cogeneration of heat and power, comprising a waste heat recovery device body, characterized in that: The waste heat recovery device body comprises a recovery channel (1), a water injection assembly (5) and a medium conveying assembly (6); a cogeneration smoke input pipe (2) is arranged at the front end of the recovery channel (1); the other end of the recovery channel (1) is connected to a cogeneration smoke exhaust pipe (3); a water injection assembly (5) is arranged at one end of the top of the recovery channel (1); and the interior of the recovery channel (1) is connected to the interior of the medium conveying assembly (6).

2. A heat and power cogeneration waste heat recovery device according to claim 1, characterized in that: The recovery channel (1) is provided with a fluid channel (7), a smoke diversion interlayer (8) and an air channel (9) inside, wherein the fluid channel (7) is arranged at the top of the smoke diversion interlayer (8), and the air channel (9) is arranged at the bottom of the smoke diversion interlayer (8).

3. A heat and power cogeneration waste heat recovery device according to claim 2, characterized in that: The fluid channel (7) and the air channel (9) are both provided with heat-conducting baffles (10), an air inlet (4) is installed at one end of the fluid channel (7), and a guide fan (21) is installed inside the air inlet (4).

4. A heat and power cogeneration waste heat recovery device according to claim 3, characterized in that: The guide fan (21) blows air from the outside into the interior of the fluid channel (7); the top and bottom of the smoke guide interlayer (8) are both provided with middle partitions (11), and the middle partition (11) above the smoke guide interlayer (8) is in an inclined state; the two ends of the interior of the smoke guide interlayer (8) are respectively connected to the cogeneration smoke input pipe (2) and the cogeneration smoke exhaust pipe (3).

5. The cogeneration waste heat recovery device according to claim 3, characterized in that: The water injection assembly (5) comprises a water injection pipeline (13) and a flow diversion pipeline (14); a docking port (12) is provided at the front end of the water injection pipeline (13); and the flow diversion pipeline (14) is provided at the bottom of the water injection pipeline (13).

6. A heat and power cogeneration waste heat recovery device according to claim 5, characterized in that: The diversion pipe (14) penetrates downward from the top of the recovery channel (1) into the interior of the fluid channel (7), and the end of each diversion pipe (14) is inserted into the middle of the two heat-conducting baffles (10).

7. The cogeneration waste heat recovery device according to claim 6, characterized in that: The medium transport component (6) comprises a fluid recovery pipe (17) and a heating recovery pipe (18); the top of the fluid recovery pipe (17) is connected to the interior of the fluid channel (7) via a first collecting channel (15); and the heating recovery pipe (18) is connected to the air channel (9) via a second collecting channel (16) at the top.

8. The cogeneration waste heat recovery device according to claim 7, characterized in that: The fluid recovery pipe (17) is inserted into the middle position of the heating recovery pipe (18), a discharge channel (19) is installed on one side of the bottom of the heating recovery pipe (18), and a docking flange (20) is provided at the bottom of the fluid recovery pipe (17).

Images