A generator set waste heat recovery device

Abstract

The utility model belongs to the technical field of waste heat recovery, especially a generator set waste heat recovery equipment, including liquid storage mechanism, heat exchange water tank, heat exchange water jacket and circulating mechanism, liquid storage mechanism is used for storing heat exchange medium, it includes water storage tank, and the top of water storage tank is equipped with backwater and water supplement mouth, heat exchange water tank is used for recovering generator set cylinder heat dissipation, heat exchange water jacket is used for recovering generator set exhaust waste heat, the input of circulating mechanism communicates with liquid storage mechanism, and the output communicates with the water inlet end of heat exchange water tank and heat exchange water jacket respectively, the water outlet end of heat exchange water tank and heat exchange water jacket all communicate with liquid storage mechanism, form double -way waste heat recovery closed loop structure, realized the double -way collaborative recovery of cylinder heat dissipation and exhaust waste heat, and the waste heat recovery rate is improved significantly, through first radiating fin and second radiating fin increase heat exchange area, make cylinder heat dissipation and exhaust waste heat get full use.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, specifically relating to a waste heat recovery device for generator sets. Background Technology

[0002] Generator sets generate a large amount of waste heat during operation, with cylinder block heat dissipation and high exhaust temperature being the main sources of waste heat.

[0003] Currently, most small and medium power generator sets are not equipped with waste heat recovery devices. The cylinder heat dissipation is directly discharged through the fan cooling, and the exhaust waste heat is directly discharged into the atmosphere, resulting in a large amount of usable energy wastage and exacerbating environmental thermal pollution. A few equipment that have been equipped with waste heat recovery only have a single heat exchange structure designed for exhaust waste heat (such as a simple tubular heat exchanger), without considering the recovery of cylinder heat dissipation, resulting in a narrow recovery range and low efficiency.

[0004] To address the aforementioned problems, this utility model proposes a waste heat recovery device for generator sets. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a generator set waste heat recovery device, which is convenient to use and has high waste heat recovery efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a generator set waste heat recovery device, comprising a liquid storage mechanism, a heat exchange water tank, a heat exchange water jacket, and a circulation mechanism;

[0007] The liquid storage mechanism is used to store the heat exchange medium, and it includes a water storage tank, with a return water inlet and a water supply inlet located at the top of the water storage tank.

[0008] The heat exchange water tank is used to recover heat dissipation from the generator set cylinder.

[0009] The heat exchange water jacket is used to recover waste heat from the generator set's exhaust gas.

[0010] The input end of the circulation mechanism is connected to the liquid storage mechanism, and the output end is connected to the inlet end of the heat exchange water tank and the heat exchange water jacket, respectively. The outlet end of the heat exchange water tank and the heat exchange water jacket are both connected to the liquid storage mechanism, forming a dual-path waste heat recovery closed-loop structure.

[0011] As a preferred embodiment of this utility model, the heat exchange water tank includes:

[0012] The box body has a first water inlet and a first water outlet at the top and bottom of its outer side, respectively, and one side of the box body is open.

[0013] A sealing cover is fixed to the opening side of the box body by bolts, and a rubber sealing frame is provided between the sealing cover and the box body.

[0014] As a preferred embodiment of this utility model, a plurality of equally spaced first heat dissipation fins are fixed inside the box, and the width of the first heat dissipation fins is smaller than the width of the inner cavity of the box.

[0015] As a preferred embodiment of this utility model, the heat exchange water jacket includes:

[0016] An inner heat exchange tube is sleeved on the outside of the generator set exhaust pipe. One end of the inner heat exchange tube has a fixed limiting plate, and a second water outlet is provided on the limiting plate. A first retaining ring is provided on the side of the limiting plate facing the inner heat exchange tube.

[0017] An external heat exchange tube is sleeved outside the inner heat exchange tube, with one end of it embedded in the first retaining ring. The space between the inner heat exchange tube and the external heat exchange tube is a heat exchange chamber.

[0018] A sealing disc is fixed to the end of the outer heat exchange tube. A second water inlet is provided on the sealing disc. A second retaining ring and a third retaining ring are provided on the side of the sealing disc facing the inner heat exchange tube. The inner heat exchange tube is embedded in the second retaining ring, and the outer heat exchange tube is embedded in the third retaining ring.

[0019] As a preferred embodiment of this utility model, a first rubber sealing ring is provided between the external heat exchange tube and the limiting plate, and a third rubber sealing ring is provided between the external heat exchange tube and the sealing plate, and a second rubber sealing ring is provided between the internal heat exchange tube and the sealing plate.

[0020] As a preferred embodiment of this utility model, the outer wall of the inner heat exchange tube is fixed with a plurality of second heat dissipation fins that are equally spaced along the circumferential direction, and the width of the second heat dissipation fins is smaller than the width of the heat exchange water jacket.

[0021] As a preferred embodiment of this utility model, the circulation mechanism includes:

[0022] A micro circulation pump is fixed to the top of the water storage tank, and the water inlet of the micro circulation pump is connected to the water storage tank via a pipe.

[0023] The first three-way connector is connected to the inlet of the first three-way connector via a hose at the outlet end of the micro circulation pump, and the two outlet ends of the first three-way connector are respectively connected to the first inlet and the second inlet via hoses.

[0024] The second three-way connector has the first outlet and the second outlet connected to the two inlet ends of the second three-way connector via flexible hoses, and the outlet end of the second three-way connector connected to the return outlet via flexible hoses.

[0025] As a preferred technical solution of this utility model, it also includes:

[0026] A sealing cap is installed at the port of the water inlet by means of threaded engagement, and a venting micropore is provided on the sealing cap.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] 1. It achieves dual-path coordinated recovery of cylinder block heat dissipation and exhaust waste heat, significantly improving the waste heat recovery rate;

[0029] 2. By increasing the heat exchange area through the first and second heat dissipation fins, the heat dissipation of the cylinder block and the waste heat of the exhaust can be fully utilized.

[0030] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the exploded structure of the heat exchange water tank in this utility model;

[0034] Figure 3 This is a schematic diagram of the cross-sectional structure of the heat exchange water jacket in this utility model;

[0035] Figure 4 This is a schematic diagram of the isometric structure of the internal heat exchange tube in this utility model;

[0036] Figure 5 This utility model Figure 1 A magnified structural diagram at point A in the diagram.

[0037] In the diagram: 1. Liquid storage mechanism; 11. Water storage tank; 111. Return water inlet; 112. Water inlet; 2. Heat exchange water tank; 21. Tank body; 211. First water inlet; 212. First water outlet; 213. First heat dissipation fins; 22. Sealing cover; 23. Rubber sealing frame; 3. Heat exchange water jacket; 31. Inner heat exchange tube; 311. Limiting plate; 312. Second water outlet; 313. First retaining ring; 314. 315. First rubber sealing ring; 32. Second heat dissipation fins; 33. External heat exchange tube; 34. Heat exchange chamber; 35. Sealing plate; 36. Second water inlet; 37. Second retaining ring; 38. Third retaining ring; 39. Second rubber sealing ring; 30. Third rubber sealing ring; 41. Circulation mechanism; 42. Micro circulation pump; 43. First tee connector; 44. Second tee connector; 5. Sealing cap; 55. Ventilation micropores. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figures 1-5 The present invention provides the following technical solution: a generator set waste heat recovery device, including a liquid storage mechanism 1, a heat exchange water tank 2, a heat exchange water jacket 3 and a circulation mechanism 4.

[0040] Furthermore, by Figure 1 As shown in this embodiment, the liquid storage mechanism 1 is used to store the heat exchange medium, which includes a water storage tank 11. The top of the water storage tank 11 is provided with a return water port 111 and a water supply port 112. The heat exchange water tank 2 is used to recover the heat dissipation of the generator set cylinder. The heat exchange water jacket 3 is used to recover the waste heat of the generator set exhaust. The input end of the circulation mechanism 4 is connected to the liquid storage mechanism 1, and the output end is connected to the inlet end of the heat exchange water tank 2 and the heat exchange water jacket 3 respectively. The outlet end of the heat exchange water tank 2 and the heat exchange water jacket 3 are both connected to the liquid storage mechanism 1, forming a dual-path waste heat recovery closed-loop structure. After adopting the above scheme, when the generator set starts running, the circulation mechanism 4 starts synchronously. Its input end draws low-temperature heat exchange medium (here, water) from the water storage tank 11 of the liquid storage mechanism 1 through the pipeline. Then, the circulation mechanism 4 delivers the low-temperature water to the inlet end of the heat exchange water tank 2 and the heat exchange water jacket 3 through the branch pipeline of the output end, thus starting the dual-path waste heat recovery process.

[0041] The heat exchange water tank 2 maintains close heat exchange contact with the generator set cylinder. When the generator set is running, the cylinder generates a large amount of heat due to fuel combustion and mechanical friction, keeping the cylinder surface at a high temperature. When the low-temperature water delivered by the circulation mechanism 4 enters the heat exchange water tank 2, the low-temperature water and the high-temperature cylinder transfer heat through the wall of the heat exchange water tank 2. After absorbing the heat emitted by the cylinder, the water temperature gradually increases and transforms into medium-high temperature water. After completing the heat exchange, the medium-high temperature water flows through the outlet pipe of the heat exchange water tank 2 and along the preset return water pipe to the return water port 111 of the water storage tank 11, and finally flows into the water storage tank 11 for storage.

[0042] During the operation of the generator set, the high-temperature exhaust gas after combustion will flow through the internal channel of the heat exchange water jacket 3 along the exhaust pipe. The heat exchange water jacket 3 is wrapped around the outside of the exhaust pipe. When the low-temperature water transported by the circulation mechanism 4 enters the internal cavity of the jacket, the low-temperature water and the high-temperature exhaust gas form a high-efficiency heat exchange through the jacket wall: the waste heat of the exhaust gas is absorbed by the water, causing the water temperature to rise rapidly to the medium-high temperature range, while the exhaust gas is discharged after the temperature drops due to heat release. The medium-high temperature water that absorbs the waste heat of the exhaust gas merges with the return water pipe of the heat exchange water tank 2 through the outlet pipe of the heat exchange water jacket 3, and flows into the water storage tank 11 through the return water port 111 of the water storage tank 11.

[0043] The medium- and high-temperature water recovered from both channels continuously flows into the water storage tank 11, causing the water temperature in the water storage tank 11 to gradually rise. This achieves centralized recovery and storage of heat dissipation from the generator set cylinder and exhaust waste heat (which can be used for subsequent heating, hot water supply, or secondary power generation). At the same time, if the heat exchange medium in the water storage tank 11 is lost due to evaporation, leakage, or other reasons, new low-temperature water can be added to the tank through the top water inlet 112 to ensure that the water storage tank 11 always maintains a sufficient amount of medium. This ensures that the circulation mechanism 4 can continuously extract the medium, enabling the dual-channel waste heat recovery closed-loop structure to operate stably and achieve efficient and continuous recovery and utilization of the generator set's waste heat.

[0044] Optionally, by Figure 1 and Figure 2 As shown in this embodiment, the heat exchange water tank 2 includes: a tank body 21 and a sealing cover plate 22. The top and bottom of the outer side of the tank body 21 are respectively provided with a first water inlet 211 and a first water outlet 212, and one side of the tank body 21 is open. The sealing cover plate 22 is fixed to the open side of the tank body 21 by bolts, and a rubber sealing frame 23 is provided between the sealing cover plate 22 and the tank body 21. With the above scheme, when in use, the low temperature heat exchange medium (water) transported by the circulation mechanism 4 is introduced into the tank body 21 through the first water inlet 211 at the top of the outer side of the tank body 21 via the pipeline. At this time, the side of the tank body 21 without an opening (the side wall opposite to the sealing cover plate 22) is in close contact with the surface of the generator set cylinder. The heat generated by the cylinder during operation is quickly conducted to the water inside the tank body 21 through this side wall.

[0045] Low-temperature water gradually fills the cavity of the tank 21, making full contact with the high-temperature tank wall and absorbing heat. As heat exchange continues, the water temperature gradually rises. Since the first outlet 212 is located at the bottom of the outer side of the tank 21, the high-temperature water naturally sinks due to density change and flows out from the first outlet 212. It then flows into the return water pipe of the liquid storage mechanism 1 through the pipeline and finally flows into the water storage tank 11 through the return water port 111.

[0046] During this process, the sealing cover 22 is fastened to the opening side of the box 21 by bolts, and a reliable seal is formed with the rubber sealing frame 23 between the two. This not only prevents the heat exchange medium inside the box 21 from leaking, but also prevents external dust and water vapor from entering the box and affecting the heat exchange effect. At the same time, the rubber material has a certain elasticity, which can buffer the vibration generated during the operation of the generator set and prevent the sealing structure from loosening due to long-term vibration, thus ensuring the sealing and stability of the heat exchange water tank 2 during continuous operation of the equipment.

[0047] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, multiple equally spaced first heat dissipation fins 213 are fixed inside the housing 21, and the width of the first heat dissipation fins 213 is smaller than the width of the inner cavity of the housing 21. With the above solution, during use, the low-temperature water not only contacts the inner wall of the housing 21 to absorb heat during the flow process, but also fully contacts the surface of the multiple first heat dissipation fins 213. The equally spaced first heat dissipation fins 213 break the laminar flow state of the water, so that the water flow forms local turbulence in the gaps between the first heat dissipation fins 213, which increases the contact area and relative flow velocity between the water and the heat-conducting surface, reduces the thermal resistance of the water boundary layer, and allows heat to be transferred to the water more efficiently from the first heat dissipation fins 213 and the housing wall.

[0048] Meanwhile, since the width of the first heat dissipation fin 213 is smaller than the width of the inner cavity of the box 21, a flow gap is reserved between at least one side of the first heat dissipation fin 213 and the inner wall of the box 21. This not only prevents the first heat dissipation fin 213 from obstructing the overall flow of water, but also guides the water flow to flow evenly through each first heat dissipation fin 213, ensuring that the water in different areas of the box 21 can fully absorb heat and preventing excessive local water temperature differences.

[0049] Optionally, by Figure 1 and Figure 3As shown, in this embodiment, the heat exchange water jacket 3 includes: an inner heat exchange tube 31, an outer heat exchange tube 32, and a sealing disc 34. The inner heat exchange tube 31 is sleeved on the outside of the generator set exhaust pipe. One end of the inner heat exchange tube 31 has a fixed limiting disc 311, and a second water outlet 312 is provided on the limiting disc 311. A first retaining ring 313 is provided on the side of the limiting disc 311 facing the inner heat exchange tube 31. The outer heat exchange tube 32 is sleeved on the outside of the inner heat exchange tube 31, and one end of it is embedded in the first retaining ring 313. The space between the inner heat exchange tube 31 and the outer heat exchange tube 32 is a heat exchange chamber 33. The sealing disc 34 is fixed to the end of the outer heat exchange tube 32, and a second water inlet 341 is provided on the sealing disc 34. The sealing disc 34 has a second retaining ring 342 and a third retaining ring 343 on the side facing the inner heat exchange tube 31. The inner heat exchange tube 31 is embedded in the second retaining ring 342, and the outer heat exchange tube 32 is embedded in the third retaining ring 343. With the above scheme, when in use, the low temperature heat exchange medium (water) transported by the circulation mechanism 4 is introduced into the second water inlet 341 on the sealing disc 34 through the pipeline, and flows into the heat exchange chamber 33 formed between the inner heat exchange tube 31 and the outer heat exchange tube 32 through the second water inlet 341. At this time, since the inner heat exchange tube 31 is directly sleeved on the outside of the generator set exhaust pipe, the heat of the high temperature exhaust gas in the exhaust pipe will be quickly conducted to the tube wall of the inner heat exchange tube 31, so that the inner heat exchange tube 31 maintains a high temperature state.

[0050] The low-temperature water entering the heat exchange chamber 33 will gradually fill the entire annular heat exchange chamber 33 and make full contact with the outer wall of the high-temperature inner heat exchange tube 31. At the same time, the outer heat exchange tube 32, being on the outside, can reduce the loss of heat from the heat exchange chamber 33 to the external environment. As the low-temperature water flows axially in the heat exchange chamber 33, it continuously absorbs the waste heat from the exhaust gas transferred by the inner heat exchange tube 31, and the water temperature rises rapidly, gradually transforming into medium-high temperature water.

[0051] After absorbing heat, the medium-high temperature water eventually flows to the limiting plate 311 at the end of the inner heat exchange tube 31, flows out through the second outlet 312 on the limiting plate 311, merges into the return water pipeline of the liquid storage mechanism 1 through the pipeline, and finally flows into the water storage tank 11 through the return water outlet 111.

[0052] In addition, one end of the external heat exchange tube 32 is embedded in the first retaining ring 313 of the limiting plate 311, and the other end is fixed by the third retaining ring 343 of the sealing plate 34; the end of the internal heat exchange tube 31 away from the limiting plate 311 is embedded in the second retaining ring 342 of the sealing plate 34, ensuring long-term stable operation of the heat exchange water jacket 3 and efficient recovery of waste heat from the exhaust pipe.

[0053] Preferably, by Figure 1 and Figure 3As shown in this embodiment, a first rubber sealing ring 314 is provided between the external heat exchange tube 32 and the limiting plate 311, and a third rubber sealing ring 36 is provided between the external heat exchange tube 32 and the sealing plate 34. A second rubber sealing ring 35 is provided between the internal heat exchange tube 31 and the sealing plate 34. With the above solution, when one end of the external heat exchange tube 32 is embedded in the first retaining ring 313 during use, the first rubber sealing ring 314 is squeezed between the contact surfaces of the two. The elasticity of the rubber material allows it to fully fill the tiny gap between the outer wall of the external heat exchange tube 32 and the inner wall of the first retaining ring 313, forming the first sealing barrier, preventing the medium in the heat exchange chamber 33 from leaking from the connection surface between the external heat exchange tube 32 and the limiting plate 311, while preventing outside air from entering the heat exchange chamber 33 and affecting the heat exchange efficiency.

[0054] The end of the inner heat exchange tube 31 away from the limiting plate 311 is embedded in the second retaining ring 342. The second rubber sealing ring 35 is compressed between the outer wall of the inner heat exchange tube 31 and the inner wall of the second retaining ring 342. Its elastic deformation can tightly fit the surfaces of both, sealing the potential gap between the inner heat exchange tube 31 and the sealing plate 34, preventing the medium from leaking out from the connection between the inner heat exchange tube 31 and the sealing plate 34, and ensuring that the heat exchange medium flows in the heat exchange chamber 33 and participates in heat exchange.

[0055] Inside the third retaining ring 343 at the other end of the external heat exchange tube 32, the third rubber sealing ring 36 is squeezed between the outer wall of the external heat exchange tube 32 and the inner wall of the third retaining ring 343, forming a second sealing line. It works in conjunction with the first rubber sealing ring 314 to seal the gap between the external heat exchange tube 32 and the sealing component from both ends of the heat exchange chamber 33, providing double protection to avoid the decrease in circulation efficiency and waste of resources caused by medium leakage.

[0056] Preferably, by Figure 1 , Figure 3 and Figure 4 As shown in this embodiment, the outer wall of the inner heat exchange tube 31 is fixed with a plurality of second heat dissipation fins 315 evenly distributed along the circumferential direction, and the width of the second heat dissipation fins 315 is smaller than the width of the heat exchange water jacket 3. With the above scheme, when the low temperature heat exchange medium (water) transported by the circulation mechanism 4 enters the heat exchange chamber 33 through the second water inlet 341, it will quickly come into contact with the outer wall of the inner heat exchange tube 31 and the second heat dissipation fins 315. Since the inner heat exchange tube 31 is directly sleeved on the outside of the generator set exhaust pipe, the heat of the high temperature exhaust gas in the exhaust pipe is first conducted to the inner heat exchange tube 31 wall, and then transferred to the plurality of second heat dissipation fins 315 evenly distributed along the circumferential direction through heat conduction, which significantly expands the contact area with the heat exchange medium.

[0057] When the low-temperature water flows axially in the heat exchange chamber 33, it not only exchanges heat directly with the outer wall of the inner heat exchange tube 31, but also comes into full contact with the surface of the second heat dissipation fins 315. Since the second heat dissipation fins 315 are evenly distributed along the circumference, the water flow will be divided into multiple branches when passing through the gaps between the second heat dissipation fins 315, breaking the original laminar flow state and forming local turbulence. This increases the relative flow velocity between the medium and the second heat dissipation fins 315 and the tube wall, reduces the thermal resistance of the medium boundary layer, and allows heat to be transferred more quickly from the high-temperature second heat dissipation fins 315 and the tube wall to the low-temperature water.

[0058] Meanwhile, the width of the second heat dissipation fin 315 is smaller than the width of the heat exchange water jacket 3 (i.e., there is a gap between the end of the fin and the inner wall of the external heat exchange tube 32). This not only prevents the second heat dissipation fin 315 from contacting the external heat exchange tube 32 and causing heat to dissipate to the outside (reducing heat loss), but also provides a channel for the flow of the medium, ensuring that the water flow can be evenly distributed along the entire annular space of the heat exchange chamber 33, and will not form a local stagnant area due to the obstruction of the second heat dissipation fin 315.

[0059] Optionally, by Figures 1-3 As shown, in this embodiment, the circulation mechanism 4 includes: a micro circulation pump 41, a first three-way connector 42, and a second three-way connector 43. The micro circulation pump 41 is fixed to the top of the water storage tank 11, and the inlet of the micro circulation pump 41 is connected to the water storage tank 11 via a pipe. The outlet of the micro circulation pump 41 is connected to the inlet of the first three-way connector 42 via a hose. The two outlets of the first three-way connector 42 are respectively connected to the first inlet 211 and the second inlet 341 via hoses. The first outlet 212 and the second outlet 312 are respectively connected to the two inlets of the second three-way connector 43 via hoses. The outlet of the second three-way connector 43 is connected to the return water outlet via a hose. 111. After adopting the above scheme, when the generator set is started, the micro circulation pump 41 starts synchronously. Its inlet end draws low-temperature heat exchange medium (water) from the water storage tank 11 through the pipeline. Under the power of the pump body, a water flow with a certain pressure is formed. The water flow enters the hose through the outlet end of the micro circulation pump 41 and is transported to the inlet end of the first three-way connector 42. The first three-way connector 42 divides the single inlet water into two outlet waters through the internal flow channel design. The outlet waters are transported to the first inlet 211 of the heat exchange water tank 2 and the second inlet 341 of the heat exchange water jacket 3 through two hoses, respectively, so as to realize the synchronous supply of low-temperature medium to the dual waste heat recovery components.

[0060] The low-temperature water flowing to the first inlet 211 enters the heat exchange water tank 2, absorbs the heat dissipation of the generator set cylinder, and then heats up before flowing out from the first outlet 212; the low-temperature water flowing to the second inlet 341 enters the heat exchange water jacket 3, absorbs the waste heat of the exhaust pipe, and then heats up before flowing out from the second outlet 312.

[0061] The two streams of medium-high temperature water, after being heated, are respectively transported through hoses to the two inlet ends of the second three-way connector 43. The second three-way connector 43 merges the two streams of water into a single outlet through the internal flow channel, and then transports it through the hose to the return water port 111 of the water storage tank 11, and finally flows into the water storage tank 11 to complete the circulation.

[0062] Through the power drive and diversion and merging design of the circulation mechanism 4, the heat exchange medium can form a continuous and stable dual-loop closed-loop circulation between the liquid storage mechanism 1, the heat exchange water tank 2, and the heat exchange water jacket 3, so that the heat dissipation of the generator set cylinder and the exhaust waste heat can be efficiently recovered and centrally stored in the water storage tank 11, providing a continuous high-temperature medium source for subsequent waste heat utilization (such as heating, hot water supply, etc.).

[0063] Preferably, by Figure 1 and Figure 5 As shown, this embodiment also includes a sealing cap 5, which is installed at the port of the water inlet 112 by means of threaded engagement, and a venting micro-hole 51 is provided on the sealing cap 5. With the above solution, when in use, the venting micro-hole 51 on the sealing cap 5 plays a pressure balancing role: when the pressure inside the tank is higher than the external atmospheric pressure, a small amount of steam is slowly discharged through the venting micro-hole 51, avoiding the deformation of the water storage tank 11 body and the failure of the pipeline interface seal due to excessive pressure inside the tank; when negative pressure occurs inside the tank, outside air slowly enters through the venting micro-hole 51, preventing the negative pressure from affecting the water intake efficiency of the micro circulation pump 41.

[0064] Meanwhile, the sealing cap 5 is tightly installed on the water inlet 112 port by threaded engagement. The pre-tightening force of the thread structure makes the sealing cap 5 fit tightly against the inner wall of the water inlet 112, which can effectively prevent external dust, impurities and moisture from entering the water storage tank 11.

[0065] It should be noted that the miniature circulating pump 41 is a commercially available conventional device with a built-in power switch. Those skilled in the art can make conventional selections according to their needs. Its working principle is common knowledge known to those skilled in the art and has been fully disclosed in the prior art, so it will not be elaborated further in this article.

[0066] The circuit connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0067] Components not described in detail in this article are existing technologies.

[0068] The working principle and usage process of this utility model: When the waste heat recovery equipment of this utility model is in use, when the generator set is started, the micro circulation pump 41 of the circulation mechanism 4 starts synchronously. Its inlet end draws low temperature heat exchange medium (water) from the water storage tank 11 of the liquid storage mechanism 1 through the pipeline. Under the power of the micro circulation pump 41, the low temperature water forms a stable pressure water flow, which is transported to the first three-way connector 42 through the hose at the outlet end of the pump body. The first three-way connector 42 divides the single inlet water into two paths through the internal flow channel: one path flows through the hose to the first inlet 211 of the heat exchange water tank 2, and the other path flows through the hose to the second inlet 341 of the heat exchange water jacket 3, so as to realize the synchronous medium supply of the dual heat exchange components.

[0069] Low-temperature water enters the tank 21 of the heat exchange water tank 2 through the first inlet 211. The side of the tank 21 without an opening is in close contact with the generator cylinder. The heat generated by the operation of the cylinder is conducted to the interior through the tank wall. The first heat dissipation fins 213, which are evenly distributed inside the tank 21, further diffuse the heat. Their width is smaller than the width of the inner cavity of the tank 21, which not only increases the contact area with the water, but also guides the water flow to form turbulence through the gaps between the first heat dissipation fins 213, breaks the laminar boundary layer, and improves the heat exchange efficiency.

[0070] The water temperature rises as it absorbs heat from the cylinder. Under the action of circulation pressure and density difference, it flows towards the bottom of the tank 21 and finally flows out from the first outlet 212 at the bottom and enters the return water pipe.

[0071] Low-temperature water enters the heat exchange chamber 33 between the inner heat exchange tube 31 and the outer heat exchange tube 32 through the second inlet 341. The inner heat exchange tube 31 is directly sleeved on the outside of the generator set exhaust pipe. The heat of the high-temperature exhaust gas is conducted to the heat exchange chamber 33 through the inner tube wall. The second heat dissipation fins 315 on the inner tube wall (distributed at equal intervals along the circumference, with a width smaller than the jacket width) further expand the heat exchange area, guide the water flow to form turbulence, and at the same time avoid contact with the outer heat exchange tube 32 to prevent heat loss.

[0072] The high-temperature water that absorbs the waste heat of the exhaust flows axially along the heat exchange chamber 33 and finally flows out from the second outlet 312 on the limiting plate 311 and merges into the return water pipeline.

[0073] The high-temperature water flowing out of the first outlet 212 of the heat exchange water tank 2 and the second outlet 312 of the heat exchange water jacket 3 is respectively transported to the two inlet ends of the second three-way connector 43 through hoses. The second three-way connector 43 merges the two high-temperature water streams into a single stream, which is then transported through a hose to the return water outlet 111 of the water storage tank 11. Finally, it flows into the water storage tank 11 to complete the circulation. The water storage tank 11 centrally stores the high-temperature water recovered from both streams, providing a stable heat source for subsequent heating, hot water supply, or secondary power generation scenarios.

[0074] If the water storage tank 11 is insufficient due to evaporation, leakage or external use, the sealing cap 5 can be unscrewed and clean water can be added through the water inlet 112 to ensure sufficient circulating medium.

[0075] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A generator set waste heat recovery apparatus, characterized by, It includes a liquid storage mechanism (1), a heat exchange water tank (2), a heat exchange water jacket (3), and a circulation mechanism (4); The liquid storage mechanism (1) is used to store the heat exchange medium, and includes a water storage tank (11), with the top of the water storage tank (11) located at the return water port (111) and the water supply port (112). The heat exchange water tank (2) is used to recover the heat dissipation of the generator set cylinder; The heat exchange water jacket (3) is used to recover the waste heat from the generator set exhaust. The input end of the circulation mechanism (4) is connected to the liquid storage mechanism (1), and the output end is connected to the inlet end of the heat exchange water tank (2) and the heat exchange water jacket (3), respectively. The outlet end of the heat exchange water tank (2) and the heat exchange water jacket (3) are both connected to the liquid storage mechanism (1), forming a dual-path waste heat recovery closed-loop structure.

2. The generator set waste heat recovery equipment according to claim 1, characterized in that: The heat exchange water tank (2) includes: The box (21) has a first water inlet (211) and a first water outlet (212) at the top and bottom of its outer side, respectively, and the box (21) has an opening on one side. A sealing cover (22) is fixed to the opening side of the box (21) by bolts, and a rubber sealing frame (23) is provided between the sealing cover (22) and the box (21).

3. The generator set waste heat recovery equipment according to claim 2, characterized in that: The housing (21) has a plurality of equally spaced first heat dissipation fins (213) fixed inside, and the width of the first heat dissipation fins (213) is smaller than the width of the inner cavity of the housing (21).

4. The generator set waste heat recovery equipment according to claim 2, characterized in that: The heat exchange water jacket (3) includes: An inner heat exchange tube (31) is sleeved on the outside of the generator set exhaust pipe. One end of the inner heat exchange tube (31) has a fixed limiting plate (311), and a second water outlet (312) is provided on the limiting plate (311). A first retaining ring (313) is provided on the side of the limiting plate (311) facing the inner heat exchange tube (31). An external heat exchange tube (32) is sleeved outside the internal heat exchange tube (31), with one end embedded in the first retaining ring (313). The space between the internal heat exchange tube (31) and the external heat exchange tube (32) is a heat exchange chamber (33). A sealing disc (34) is fixed to the end of the outer heat exchange tube (32). A second water inlet (341) is provided on the sealing disc (34). A second retaining ring (342) and a third retaining ring (343) are provided on the side of the sealing disc (34) facing the inner heat exchange tube (31). The inner heat exchange tube (31) is embedded in the second retaining ring (342), and the outer heat exchange tube (32) is embedded in the third retaining ring (343).

5. The generator set waste heat recovery equipment according to claim 4, characterized in that: A first rubber sealing ring (314) is provided between the external heat exchange tube (32) and the limiting plate (311), and a third rubber sealing ring (36) is provided between the external heat exchange tube (32) and the sealing plate (34). A second rubber sealing ring (35) is provided between the internal heat exchange tube (31) and the sealing plate (34).

6. The generator set waste heat recovery device according to claim 5, characterized in that: The outer wall of the inner heat exchange tube (31) is fixed with a plurality of second heat dissipation fins (315) that are equally spaced along the circumferential direction, and the width of the second heat dissipation fins (315) is smaller than the width of the heat exchange water jacket (3).

7. The generator set waste heat recovery equipment according to claim 4, characterized in that: The circulation mechanism (4) includes: A micro circulation pump (41) is fixed to the top of the water storage tank (11), and the water inlet of the micro circulation pump (41) is connected to the water storage tank (11) by a pipe. The first three-way connector (42) is connected to the inlet of the first three-way connector (42) by means of a hose. The two outlets of the first three-way connector (42) are respectively connected to the first inlet (211) and the second inlet (341) by means of hoses. The second three-way connector (43) has the first outlet (212) and the second outlet (312) connected to the two inlet ends of the second three-way connector (43) by hoses, and the outlet end of the second three-way connector (43) connected to the return outlet (111) by hoses.

8. The generator set waste heat recovery equipment according to claim 1, characterized in that: Also includes: A sealing cap (5) is installed at the port of the water inlet (112) by means of threaded engagement, and a ventilating micro-hole (51) is provided on the sealing cap (5).

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