Steam generator waste heat recovery, bathing waste heat water source heat pump and air source heat pump combined hot water making system

Abstract

The invention belongs to the technical field of industrial waste heat recovery, particularly relates to a steam generator waste heat recovery, bathing waste heat water source heat pump and air source heat pump combined water heating system, and provides the following scheme aiming at the problems that an existing device cannot form systematic waste heat recovery combined heating and cannot realize maximum waste heat recovery. Comprising a flue gas waste heat recovery pipe, a waste hot water waste heat recovery pipe, an air source heat pump, a hot water source heat pump, a flue gas discharge pipe, a waste hot water discharge pipe, a flue gas waste heat recovery assembly and a waste hot water waste heat recovery assembly. Secondary waste heat recovery is carried out on residual heat in the flue gas through an air source heat pump, primary waste heat recovery is carried out on heat in waste hot water discharged by a waste hot water discharging pipe, and secondary waste heat recovery is carried out on residual heat in the waste hot water through a hot water source heat pump; systematic waste heat recovery combined heating and maximum waste heat recovery are formed.

Description

Technical Field

[0001] The present invention relates to a waste heat recovery system, specifically a combined hot water production system for waste heat recovery of a steam generator, a heat pump using bath waste hot water, and an air source heat pump, belonging to the technical field of industrial waste heat recovery. Background Art

[0002] In order to meet the hot water demand of some large factory areas, the steam generator is often used to heat domestic or production water to meet the hot water demand of the factory area. The steam generator is a device that uses gas, electricity, biomass, petroleum, and coal as fuels to heat water into steam, and has the characteristics of energy conservation, environmental protection, exemption from inspection, exemption from filing, and intelligent full-automatic control. However, since there is a certain amount of waste heat in the flue gas discharged from the fuel combustion of the steam generator, and there is also a certain amount of waste heat in the waste hot water from domestic bathing in the factory area. If the flue gas and the waste hot water are directly discharged, there will be a large amount of energy waste. Therefore, in order to improve the thermal efficiency of energy, it is necessary to recover and reuse the heat in the discharged flue gas and waste hot water.

[0003] In the prior art, as disclosed in a waste heat recovery system of a steam generator with the publication number CN221724311U, it includes a steam generator and a waste heat exchanger. The steam generator is connected with a surplus hot water inlet pipe, a surplus hot water outlet pipe, a cooling water inlet pipe and a cooling water outlet pipe. The surplus hot water enters the steam generator through the surplus hot water inlet pipe and is discharged through the surplus hot water outlet pipe. The cooling water enters the steam generator through the cooling water inlet pipe and is discharged through the cooling water outlet pipe. The surplus hot water outlet pipe and the cooling water outlet pipe exchange heat through the waste heat exchanger. This waste heat recovery system can realize the heat recovery of the surplus hot water. And a device for recovering and utilizing the flue gas waste heat of a steam generator disclosed in the publication number CN206670412U includes heat exchangers with two or more stages arranged in a flue. Each stage of heat exchanger includes a serpentine heat exchange tube. The serpentine heat exchange tube is provided with a water inlet and a water outlet. The outer surface of the serpentine heat exchange tube is provided with fins, and the fins are arranged around the serpentine heat exchange tube. Adjacent heat exchangers are connected in series. The water outlet of the heat exchanger far from the steam generator body in adjacent heat exchangers is connected to the water inlet of the heat exchanger close to the steam generator body. The water outlet of the heat exchanger closest to the steam generator body is connected to a hot water storage tank. This device can realize the heat recovery of the heat in the flue gas. However, since the prior art can only unidirectionally recover the waste heat of the surplus hot water or the flue gas and cannot form a systematic waste heat recovery combined heating, the actual waste heat recovery efficiency is relatively low. Moreover, when recovering the heat of the surplus hot water, only the surplus hot water enters the steam generator through the surplus hot water inlet pipe and is discharged through the surplus hot water outlet pipe, that is, only the heat of the surplus hot water can be recovered through a simple heat exchange principle. But in the heat exchange process, the surplus hot water cannot be properly agitated. Because the surplus hot water close to the heat exchange part can achieve a better heat exchange effect during heat exchange, but the surplus hot water far from the heat exchange part cannot play a heat exchange role, thus resulting in the inability to improve the actual heat exchange efficiency. Secondly, when recovering the heat of the flue gas, due to the high heat contained in the flue gas and the fast flow rate of the flue gas, simply passing through a single heat exchange cannot maximize the heat exchange efficiency of the flue gas. Finally, the flue gas and the surplus hot water after heat exchange will still carry some residual heat. The prior art often directly discharges the flue gas and the surplus hot water after heat exchange, and fails to achieve the complete recovery of the waste heat. Summary of the Invention

[0004] The present invention provides a combined hot water system for waste heat recovery of a steam generator, a bath waste hot water source heat pump and an air source heat pump to solve the problems that the existing devices cannot form a systematic waste heat recovery combined heating and cannot achieve the maximum recovery of waste heat.

[0005] The present invention achieves the above object through the following technical solutions: A combined hot water production system for waste heat recovery of a steam generator, a waste hot water source heat pump, and an air source heat pump, comprising a flue gas delivery pipe, a waste hot water waste heat recovery pipe, an air source heat pump, a hot water source heat pump, a flue gas discharge pipe, and a waste hot water discharge pipe. One end of the flue gas delivery pipe is communicated with the flue gas discharge pipe, and the other end of the flue gas delivery pipe is communicated with the air source heat pump. One end of the waste hot water waste heat recovery pipe is communicated with the waste hot water discharge pipe, and the other end of the waste hot water waste heat recovery pipe is communicated with the hot water source heat pump. A flue gas waste heat recovery component is arranged inside the flue gas delivery pipe, and a waste hot water waste heat recovery component is arranged inside the waste hot water waste heat recovery pipe; There are two groups of flue gas waste heat recovery components arranged inside the flue gas delivery pipe, and the two groups of flue gas waste heat recovery components are arranged in sequence along the flowing direction of the flue gas inside the flue gas delivery pipe. The flue gas waste heat recovery component includes a flue gas waste heat recovery outer shell and a flue gas waste heat recovery pipe. The flue gas waste heat recovery outer shell is fixedly connected to the inner wall of the flue gas delivery pipe. The flue gas waste heat recovery outer shell is provided with a plurality of flue gas flow cavities. A plurality of flue gas waste heat recovery pipes are provided, and the flue gas waste heat recovery pipes are respectively fixedly connected inside the flue gas flow cavities. The flue gas waste heat recovery pipe includes an input outer pipe and an output inner pipe. The output inner pipe is sleeved inside the input outer pipe, and the pipe body of the output inner pipe is fixedly connected to one end of the input outer pipe; The waste hot water waste heat recovery component includes a positioning disk, a waste hot water flow outer pipe, and a waste hot water flow inner pipe. The positioning disk is fixedly connected to the inner wall of the waste hot water waste heat recovery pipe, and the installation positions of the positioning disk are respectively located at both ends of the waste hot water waste heat recovery pipe. A plurality of waste hot water flow outer pipes are provided, and both ends of the waste hot water flow outer pipe are respectively penetrated and connected to the disk body of the positioning disk. The waste hot water flow inner pipe is fixedly sleeved inside the waste hot water flow outer pipe. Both ends of the waste hot water flow inner pipe are convex-shaped and located outside the waste hot water flow outer pipe. The pipe body of the waste hot water flow inner pipe is provided with an inner cavity, and a water passage is provided inside the pipe of the waste hot water flow inner pipe; The pipe body of the flue gas delivery pipe is fixedly connected with a flue gas waste heat recovery cold water input pipe and a flue gas waste heat recovery hot water output pipe. The flue gas waste heat recovery cold water input pipe is communicated with the cold water input end of the flue gas waste heat recovery component, and the flue gas waste heat recovery hot water output pipe is communicated with the hot water output end of the flue gas waste heat recovery component. The pipe body of the waste hot water waste heat recovery pipe is fixedly connected with a waste hot water waste heat recovery cold water input pipe and a waste hot water waste heat recovery hot water output pipe. The waste hot water waste heat recovery cold water input pipe is communicated with the cold water input end of the waste hot water waste heat recovery component, and the waste hot water waste heat recovery hot water output pipe is communicated with the hot water output end of the waste hot water waste heat recovery component. The output ends of the flue gas waste heat recovery hot water output pipe and the waste hot water waste heat recovery hot water output pipe are communicated with a hot water regulation output component.

[0006] As a further solution of the present invention: One end of the flue gas delivery pipe away from the flue gas discharge pipe is connected with a flue gas guiding pipe, and the flue gas guiding pipe is communicated with the input interface of the air source heat pump. One end of the waste hot water waste heat recovery pipe away from the waste hot water discharge pipe is connected with a waste hot water guiding pipe, and the waste hot water guiding pipe is communicated with the input interface of the hot water source heat pump, so as to be able to guide the flue gas after the heat in the flue gas discharged from the flue gas discharge pipe is recovered by the flue gas waste heat recovery assembly to the air source heat pump through the flue gas guiding pipe.

[0007] As a further solution of the present invention: Docking plates are provided at both the end of the flue gas delivery pipe that docks with the flue gas discharge pipe and the other end of the flue gas delivery pipe that docks with the flue gas guiding pipe. Also, docking plates are provided at both the end of the waste hot water waste heat recovery pipe that docks with the hot water source heat pump and the end of the waste hot water waste heat recovery pipe that docks with the waste hot water guiding pipe. A number of docking bolts are threadedly connected to the docking plates; It should be noted that a sealing gasket is provided on the docking surface of the docking plate, and the installation directions of the docking bolts are installed in a positive and reverse staggered manner.

[0008] As a further solution of the present invention: A cold water connection branch pipe is communicated between the input outer pipes of two adjacent flue gas waste heat recovery pipes. A hot water connection branch pipe is communicated between the output inner pipes of the upper and lower flue gas waste heat recovery pipes. The bottoms of multiple hot water connection branch pipes are communicated with a hot water converging pipe; One of the cold water connection branch pipes is communicated with a cold water input interface. The cold water input interface is communicated with a flue gas waste heat recovery cold water input pipe. The pipe body of the flue gas waste heat recovery cold water input pipe is located above the flue gas delivery pipe. The hot water converging pipe is communicated with a hot water output interface. The hot water output interface is communicated with a flue gas waste heat recovery hot water output pipe. The pipe body of the flue gas waste heat recovery hot water output pipe is located below the flue gas delivery pipe; A number of annular inclined baffle plates are connected to the inner wall of the input outer pipe. The inclination direction of the annular inclined baffle plates is consistent with the flowing direction of the cold water inside the input outer pipe.

[0009] As a further solution of the present invention: A perforated plate is fixedly connected inside the flue gas delivery pipe. The installation position of the perforated plate is between two flue gas waste heat recovery outer shells.

[0010] As a further solution of the present invention: Positioning rods are connected to both side cavity surfaces of the flue gas flow cavity opened in the flue gas waste heat recovery outer shell. And the flue gas waste heat recovery outer shell is fixedly connected to the input outer pipe through the positioning rods. Arc-shaped diversion cavities are opened on the upper and lower cavity surfaces of the flue gas flow cavity.

[0011] As a further solution of the present invention: One end of the waste hot water flowing inner pipe close to the waste hot water discharge pipe is connected with a cold water input branch pipe. The cold water input branch pipe is communicated with the inner cavity, and a plurality of cold water input branch pipes are communicated with the waste hot water waste heat recovery cold water input pipe. The other end of the waste hot water flowing inner pipe far from the waste hot water discharge pipe is connected with a hot water output branch pipe. The hot water output branch pipe is communicated with the inner cavity, and a plurality of hot water output branch pipes are communicated with the waste hot water waste heat recovery hot water output pipe.

[0012] As a further solution of the present invention: A spiral guide plate is connected at the gap between the waste hot water flowing inner pipe and the waste hot water flowing outer pipe.

[0013] As a further solution of the present invention: A forward guide baffle and a reverse guide baffle are connected in the water passage of the waste hot water flowing inner pipe, and the installation positions of the forward guide baffle and the reverse guide baffle are arranged in sequence along the flowing direction of the waste hot water in the water passage.

[0014] As a further solution of the present invention: The hot water regulation and output assembly includes a primary hot water output pipe, a secondary hot water output pipe, a tertiary hot water output pipe and a valve assembly. The waste hot water waste heat recovery hot water output pipe is communicated with the primary hot water output pipe. One of the flue gas waste heat recovery hot water output pipes close to the flue gas discharge pipe is communicated with the secondary hot water output pipe, and the other flue gas waste heat recovery hot water output pipe far from the flue gas discharge pipe is communicated with the tertiary hot water output pipe. A hot water diversion pipe is communicated between the primary hot water output pipe, the secondary hot water output pipe and the tertiary hot water output pipe. A valve assembly is installed on the hot water diversion pipe. The valve assembly includes a primary hot water three-way valve, a secondary hot water three-way valve and a tertiary hot water opening and closing valve. The primary hot water three-way valve is installed at the connection part between the primary hot water output pipe and the hot water diversion pipe. The secondary hot water three-way valve is installed at the connection part between the secondary hot water output pipe and the hot water diversion pipe. The tertiary hot water opening and closing valve is installed at the connection part between the tertiary hot water output pipe and the hot water diversion pipe. Temperature sensors are installed on the pipe bodies of the waste hot water waste heat recovery hot water output pipe and the flue gas waste heat recovery hot water output pipe, and the temperature sensors and the valve assembly are both in signal transmission connection with an external control terminal.

[0015] The beneficial effects of the present invention are: 1. The present invention is provided with a flue gas delivery pipe, a waste hot water waste heat recovery pipe, an air source heat pump, a hot water source heat pump, a flue gas discharge pipe, and a waste hot water discharge pipe. A flue gas waste heat recovery component is arranged inside the flue gas delivery pipe, and a waste hot water waste heat recovery component is arranged inside the waste hot water waste heat recovery pipe. First, the heat in the flue gas discharged by the flue gas discharge pipe can be initially recovered by the flue gas waste heat recovery component in the flue gas delivery pipe, and then the remaining heat in the flue gas can be secondarily recovered by the air source heat pump. Through the two-stage waste heat recovery, more thorough recovery of the heat in the flue gas generated by the steam generator can be achieved. And the heat in the waste hot water discharged by the waste hot water discharge pipe can be initially recovered by the waste hot water waste heat recovery component in the waste hot water waste heat recovery pipe, and then the remaining heat in the waste hot water can be secondarily recovered by the hot water source heat pump. Through the two-stage waste heat recovery, more thorough recovery of the heat in the bath waste hot water can be achieved; 2. The flue gas waste heat recovery component provided by the present invention includes a flue gas waste heat recovery housing and a flue gas waste heat recovery pipe. The flue gas waste heat recovery pipe includes an input outer pipe and an output inner pipe. The output inner pipe is sleeved inside the input outer pipe, and the pipe body of the output inner pipe is fixedly connected to one end of the input outer pipe. When the flue gas discharged by the flue gas discharge pipe enters the flue gas delivery pipe, the flue gas will flow into the flue gas flow cavity opened in the flue gas waste heat recovery housing respectively. At the same time, cold water is input into the input outer pipe of the flue gas waste heat recovery pipe. The cold water exchanges heat with the flue gas in the flue gas flow cavity through the pipe wall of the input outer pipe, and thus the heat in the flue gas can be recovered into the cold water in the input outer pipe to recover the waste heat of the flue gas in the flue gas flow cavity. And because the output inner pipe is sleeved inside the input outer pipe, the flow space of the cold water in the input outer pipe is the gap between the output inner pipe and the input outer pipe. Therefore, it can be ensured that during the flow of the cold water, there is no cold water at the center position of the pipe, and thus the hot water that has been heated near the pipe wall can be prevented from exchanging heat with the cold water at the center of the pipe, that is, it can be ensured that the heated hot water maintains a relatively high temperature to meet the use requirements of high-temperature hot water. And by setting two sets of flue gas waste heat recovery components, the flue gas can be subjected to two-stage waste heat recovery, that is, the maximum recovery of waste heat can be achieved, and the hot water generated by recovering waste heat on both sides can have different temperatures to meet different use requirements, without the need for water temperature adjustment during subsequent use; 3. The waste hot water waste heat recovery component provided by the present invention includes a positioning disk, a waste hot water flow outer pipe, and a waste hot water flow inner pipe. The body of the waste hot water flow inner pipe is provided with an inner cavity, and a water passage is provided inside the waste hot water flow inner pipe. Through the combined action of the positioning disk and the waste hot water flow outer pipe, the waste hot water entering the waste hot water waste heat recovery pipe can only flow inside the waste hot water flow outer pipe. The waste hot water flow inner pipe is sleeved inside the waste hot water flow outer pipe, and the waste hot water flow inner pipe is provided with a water passage. Therefore, the waste hot water can flow through the gap between the waste hot water flow outer pipe and the waste hot water flow inner pipe and the water passage of the waste hot water flow inner pipe. When cold water is injected into the inner cavity provided in the body of the waste hot water flow inner pipe, the waste hot water can exchange heat with the cold water through the inner and outer side walls of the waste hot water flow inner pipe, ensuring maximum recovery of the waste heat of the waste hot water. And because there are multiple waste hot water flow outer pipes and waste hot water flow inner pipes, waste heat recovery in a small unit range can be achieved for the waste hot water, further improving the recovery efficiency of the waste heat of the waste hot water; 4. The body of the flue gas delivery pipe provided by the present invention is fixedly connected with a flue gas waste heat recovery cold water input pipe and a flue gas waste heat recovery hot water output pipe. The body of the waste hot water waste heat recovery pipe is fixedly connected with a waste hot water waste heat recovery cold water input pipe and a waste hot water waste heat recovery hot water output pipe. The output ends of the flue gas waste heat recovery hot water output pipe and the waste hot water waste heat recovery hot water output pipe are connected to a hot water regulation output component, and hot water within a specific temperature range can be converged and output through the hot water regulation output component to meet different usage requirements, without the need for water temperature adjustment during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the connection structure of the flue gas delivery pipe of the present invention; Figure 3 is a partial structure schematic diagram of the flue gas delivery pipe and the flue gas guiding pipe of the present invention; Figure 4 is a schematic diagram of the internal structure of the flue gas delivery pipe of the present invention; Figure 5 is a schematic diagram of the structure of the flue gas waste heat recovery component of the present invention; Figure 6 is a schematic diagram of the structure of the flue gas waste heat recovery pipe of the present invention; Figure 7 is a schematic diagram of the structure of the flue gas waste heat recovery housing of the present invention; Figure 8 is a schematic diagram of the cross-sectional structure of the flue gas waste heat recovery pipe of the present invention; Figure 9 is a schematic diagram of the cross-sectional structure of the flue gas flow cavity of the present invention; Figure 10Schematic diagram of the connection structure of the waste hot water waste heat recovery pipe of the present invention; Figure 11 Schematic sectional view of the waste hot water waste heat recovery pipe of the present invention; Figure 12 Schematic diagram of the structure of the waste hot water flow outer pipe of the present invention; Figure 13 Schematic sectional view of the waste hot water flow inner pipe of the present invention; Figure 14 Schematic diagram of the structure of the forward flow guiding baffle of the present invention; Figure 15 Schematic diagram of the structure of the reverse flow guiding baffle of the present invention; Figure 16 Schematic diagram of the structure of the hot water regulation output component of the present invention.

[0017] In the figure: 1. Flue gas delivery pipe; 11. Flue gas guiding pipe; 12. Cold water input pipe for flue gas waste heat recovery; 13. Hot water output pipe for flue gas waste heat recovery; 14. Outer shell for flue gas waste heat recovery; 15. Mesh plate; 16. Flue gas waste heat recovery pipe; 161. Input outer pipe; 162. Output inner pipe; 163. Annular inclined baffle; 17. Cold water connecting branch pipe; 18. Hot water connecting branch pipe; 19. Cold water input interface; 110. Hot water confluence pipe; 111. Hot water output interface; 112. Flue gas flow chamber; 113. Arc-shaped diversion chamber; 114. Positioning rod; 2. Waste hot water waste heat recovery pipe; 21. Waste hot water guiding pipe; 22. Cold water input pipe for waste hot water waste heat recovery; 23. Hot water output pipe for waste hot water waste heat recovery; 24. Positioning disk; 25. Waste hot water flow outer pipe; 26. Waste hot water flow inner pipe; 261. Inner cavity; 262. Water passage; 27. Cold water input branch pipe; 28. Hot water output branch pipe; 29. Spiral flow guiding plate; 210. Forward flow guiding baffle; 211. Reverse flow guiding baffle; 3. Air source heat pump; 4. Hot water source heat pump; 5. Flue gas discharge pipe; 6. Waste hot water discharge pipe; 7. Docking disk; 71. Docking bolt; 8. Temperature sensor; 9. Primary hot water output pipe; 91. Hot water diversion pipe; 92. Secondary hot water output pipe; 93. Tertiary hot water output pipe; 94. Valve assembly; 941. Primary hot water three-way valve; 942. Secondary hot water three-way valve; 943. Tertiary hot water on-off valve. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Embodiment 1 As Figure 1 , Figure 2 , Figure 4 , Figure 8 , Figure 10 and Figure 11 shown, a combined hot water production system of waste heat recovery of a steam generator, a waste hot water source heat pump, and an air source heat pump includes a flue gas delivery pipe 1, a waste hot water waste heat recovery pipe 2, an air source heat pump 3, a hot water source heat pump 4, a flue gas discharge pipe 5, and a waste hot water discharge pipe 6. One end of the flue gas delivery pipe 1 is communicated with the flue gas discharge pipe 5, and the other end of the flue gas delivery pipe 1 is communicated with the air source heat pump 3. One end of the waste hot water waste heat recovery pipe 2 is communicated with the waste hot water discharge pipe 6, and the other end of the waste hot water waste heat recovery pipe 2 is communicated with the hot water source heat pump 4. A flue gas waste heat recovery component is arranged inside the flue gas delivery pipe 1, and a waste hot water waste heat recovery component is arranged inside the waste hot water waste heat recovery pipe 2, so that the heat in the flue gas discharged from the flue gas discharge pipe 5 can be initially recovered by the flue gas waste heat recovery component inside the flue gas delivery pipe 1, and then the remaining heat in the flue gas can be secondarily recovered by the air source heat pump 3. Through the two-stage waste heat recovery, more thorough recovery of the heat in the flue gas generated by the steam generator can be achieved, and the heat in the waste hot water discharged from the waste hot water discharge pipe 6 can be initially recovered by the waste hot water waste heat recovery component inside the waste hot water waste heat recovery pipe 2, and then the remaining heat in the waste hot water can be secondarily recovered by the hot water source heat pump 4. Through the two-stage waste heat recovery, more thorough recovery of the heat in the bath waste hot water can be achieved; There are two sets of flue gas waste heat recovery components arranged in the flue gas delivery pipe 1, and the two sets of flue gas waste heat recovery components are arranged in sequence along the flow direction of the flue gas in the flue gas delivery pipe 1. The flue gas waste heat recovery component includes a flue gas waste heat recovery outer shell 14 and a flue gas waste heat recovery pipe 16. The flue gas waste heat recovery outer shell 14 is fixedly connected to the inner wall of the flue gas delivery pipe 1. The flue gas waste heat recovery outer shell 14 is provided with a number of flue gas flow cavities 112. A number of flue gas waste heat recovery pipes 16 are provided, and the flue gas waste heat recovery pipes 16 are respectively fixedly connected in the flue gas flow cavities 112. The flue gas waste heat recovery pipe 16 includes an input outer pipe 161 and an output inner pipe 162. The output inner pipe 162 is sleeved in the input outer pipe 161, and the pipe body of the output inner pipe 162 is fixedly connected to one end of the input outer pipe 161. When the flue gas discharged from the flue gas discharge pipe 5 enters the flue gas delivery pipe 1, the flue gas will flow into the flue gas flow cavities 112 opened in the flue gas waste heat recovery outer shell 14 respectively. At the same time, cold water is input into the input outer pipe 161 of the flue gas waste heat recovery pipe 16. The cold water exchanges heat with the flue gas in the flue gas flow cavity 112 through the pipe wall of the input outer pipe 161, so as to realize the recovery of the heat in the flue gas into the cold water in the input outer pipe 161 and recover the waste heat of the flue gas in the flue gas flow cavity 112. And because the output inner pipe 162 is sleeved in the input outer pipe 161, the flow space of the cold water in the input outer pipe 161 is the gap between the output inner pipe 162 and the input outer pipe 161. Therefore, it can be ensured that there is no cold water at the center position of the pipe during the flow of the cold water, so as to avoid the heat exchange between the hot water heated near the pipe wall and the cold water at the center of the pipe, that is, it can ensure that the heated hot water maintains a high temperature to meet the use requirements of high-temperature hot water. And by setting two sets of flue gas waste heat recovery components, the flue gas can be subjected to two-stage waste heat recovery, that is, the maximum recovery of waste heat can be realized, and the hot water generated by the waste heat recovery on both sides can have different temperatures to meet different use requirements, without the need for water temperature adjustment in the subsequent use process; The waste hot water waste heat recovery component includes a positioning disk 24, a waste hot water flow outer pipe 25, and a waste hot water flow inner pipe 26. The positioning disk 24 is fixedly connected to the inner wall of the pipe of the waste hot water waste heat recovery pipe 2, and the installation positions of the positioning disk 24 are located at both ends of the waste hot water waste heat recovery pipe 2 respectively. A plurality of waste hot water flow outer pipes 25 are provided. Both ends of the waste hot water flow outer pipe 25 penetrate and are connected to the disk body of the positioning disk 24 respectively. The waste hot water flow inner pipe 26 is fixedly sleeved inside the waste hot water flow outer pipe 25. Both ends of the waste hot water flow inner pipe 26 are convex and located outside the waste hot water flow outer pipe 25. An inner cavity 261 is formed in the pipe body of the waste hot water flow inner pipe 26, and a water passage 262 is formed inside the pipe of the waste hot water flow inner pipe 26. Through the combined action of the positioning disk 24 and the waste hot water flow outer pipe 25, the waste hot water entering the waste hot water waste heat recovery pipe 2 can only flow inside the waste hot water flow outer pipe 25. And the waste hot water flow inner pipe 26 is sleeved inside the waste hot water flow outer pipe 25, and the waste hot water flow inner pipe 26 is provided with a water passage 262. Therefore, the waste hot water can flow through the gap between the waste hot water flow outer pipe 25 and the waste hot water flow inner pipe 26 and the water passage 262 of the waste hot water flow inner pipe 26. When cold water is injected into the inner cavity 261 formed in the pipe body of the waste hot water flow inner pipe 26, the waste hot water can exchange heat with the cold water through the inner and outer side walls of the waste hot water flow inner pipe 26, which can ensure the maximum recovery of the waste heat of the waste hot water. And because a plurality of waste hot water flow outer pipes 25 and waste hot water flow inner pipes 26 are provided, the waste heat recovery of hot water can be realized in a small unit range, further improving the waste heat recovery efficiency of the waste hot water; A flue gas waste heat recovery cold water input pipe 12 and a flue gas waste heat recovery hot water output pipe 13 are fixedly connected to the pipe body of the flue gas delivery pipe 1. The flue gas waste heat recovery cold water input pipe 12 is communicated with the cold water input end of the flue gas waste heat recovery component, and the flue gas waste heat recovery hot water output pipe 13 is communicated with the hot water output end of the flue gas waste heat recovery component. A waste hot water waste heat recovery cold water input pipe 22 and a waste hot water waste heat recovery hot water output pipe 23 are fixedly connected to the pipe body of the waste hot water waste heat recovery pipe 2. The waste hot water waste heat recovery cold water input pipe 22 is communicated with the cold water input end of the waste hot water waste heat recovery component, and the waste hot water waste heat recovery hot water output pipe 23 is communicated with the hot water output end of the waste hot water waste heat recovery component. The output ends of the flue gas waste heat recovery hot water output pipe 13 and the waste hot water waste heat recovery hot water output pipe 23 are communicated with a hot water regulation output component, and hot water within a specific temperature range can be converged and output through the hot water regulation output component to meet different usage requirements, without the need for water temperature adjustment in the subsequent usage process.

[0020] Embodiment 2 Improved on the basis of Embodiment 1: Such as Figures 1 to 9As shown, one end of the flue gas delivery pipe 1 far from the flue gas discharge pipe 5 is connected with a flue gas guiding pipe 11, and the flue gas guiding pipe 11 is communicated with the input interface of the air source heat pump 3. One end of the waste hot water waste heat recovery pipe 2 far from the waste hot water discharge pipe 6 is connected with a waste hot water guiding pipe 21, and the waste hot water guiding pipe 21 is communicated with the input interface of the hot water source heat pump 4. In this way, it can be realized that the flue gas after the heat in the flue gas discharged from the flue gas discharge pipe 5 is recovered by the flue gas waste heat recovery component is guided to the air source heat pump 3 through the flue gas guiding pipe 11, so as to further recover the remaining heat in the flue gas. And it can be realized that the waste hot water after the heat in the waste hot water discharged from the waste hot water discharge pipe 6 is recovered by the waste hot water waste heat recovery component is guided to the hot water source heat pump 4 through the waste hot water guiding pipe 21, so as to further recover the remaining heat in the waste hot water.

[0021] Furthermore, docking plates 7 are provided at both the end of the flue gas delivery pipe 1 docked with the flue gas discharge pipe 5 and the other end of the flue gas delivery pipe 1 docked with the flue gas guiding pipe 11. And docking plates 7 are also provided at both the end of the waste hot water waste heat recovery pipe 2 docked with the hot water source heat pump 4 and the end of the waste hot water waste heat recovery pipe 2 docked with the waste hot water guiding pipe 21. A number of docking bolts 71 are threadedly connected to the docking plates 7. It can be realized that the two ends of the flue gas delivery pipe 1 are respectively docked with the flue gas discharge pipe 5 and the flue gas delivery pipe 1 through one set of docking plates 7, and it can be realized that the two ends of the waste hot water waste heat recovery pipe 2 are respectively docked with the hot water source heat pump 4 and the waste hot water guiding pipe 21 through the other set of docking plates 7. That is, it is convenient to assemble the flue gas delivery pipe 1 and the waste hot water waste heat recovery pipe 2, and the firmness of the connection can be ensured through the threaded connection of a number of docking bolts 71. It should be noted that a sealing gasket is provided on the docking surface of the docking plate 7, and the installation directions of the docking bolts 71 are installed in a positive and negative staggered manner. In this way, through the function of the sealing gasket, the sealing performance of the connection can be further improved, and the flue gas or waste hot water guided in the pipe can be prevented from overflowing. And the positive and negative staggered installation directions of the docking bolts 71 can further ensure that the docking plate 7 can be in a balanced stress state when being docked and fixed, so as to prevent the docking plate 7 from deforming. That is, it can also play a role in ensuring the sealing effect of the docking part.

[0022] Furthermore, a cold water connecting branch pipe 17 is connected between the input outer pipes 161 of two adjacent flue gas waste heat recovery pipes 16, and a hot water connecting branch pipe 18 is connected between the output inner pipes 162 of the upper and lower flue gas waste heat recovery pipes 16. The bottoms of multiple hot water connecting branch pipes 18 are connected to a hot water confluence pipe 110. The multiple input outer pipes 161 can be made to form a connected state through the cold water connecting branch pipe 17, so that cold water can be smoothly transported into each input outer pipe 161, ensuring that the flue gas conveying pipe 1 can exchange heat with the cold water in each input outer pipe 161. At the same time, when the hot water generated through heat exchange is output through the output inner pipe 162, the hot water can be gathered and flow into the hot water confluence pipe 110 through the hot water connecting branch pipe 18, realizing the decentralized input of cold water and the centralized output of hot water; One of the cold water connecting branch pipes 17 is connected to a cold water input interface 19, and the cold water input interface 19 is connected to a flue gas waste heat recovery cold water input pipe 12. The pipe body of the flue gas waste heat recovery cold water input pipe 12 is located above the flue gas conveying pipe 1. The hot water confluence pipe 110 is connected to a hot water output interface 111, and the hot water output interface 111 is connected to a flue gas waste heat recovery hot water output pipe 13. The pipe body of the flue gas waste heat recovery hot water output pipe 13 is located below the flue gas conveying pipe 1, which facilitates the introduction of cold water into the flue gas waste heat recovery component of the flue gas conveying pipe 1 through the flue gas waste heat recovery cold water input pipe 12, and facilitates the export of the hot water generated by the flue gas waste heat recovery component through the flue gas waste heat recovery hot water output pipe 13. Moreover, the flue gas waste heat recovery cold water input pipe 12 and the flue gas waste heat recovery hot water output pipe 13 are arranged in an up-and-down distribution pattern with respect to the flue gas conveying pipe 1, so that the input of cold water and the output of hot water are staggered to avoid heat exchange between cold water and hot water; A number of annular inclined baffles 163 are connected to the inner wall of the input outer pipe 161. The inclination direction of the annular inclined baffle 163 is consistent with the flow direction of the cold water in the input outer pipe 161. When cold water is introduced into the input outer pipe 161, the annular inclined baffle 163 will not affect the smooth flow of cold water, but the annular inclined baffle 163 can block the backflow of cold water, thereby ensuring that the hot water formed after flowing to the end of the input outer pipe 161 and absorbing heat can enter the output inner pipe 162 for output.

[0023] Furthermore, a perforated plate 15 is fixedly connected inside the flue gas delivery pipe 1. The installation position of the perforated plate 15 is located between two flue gas waste heat recovery housings 14. When the flue gas flows in the flue gas delivery pipe 1, the flue gas can be shunted and then gathered when passing through the holes of the perforated plate 15, forming a mixing effect on the flue gas. After the flue gas is subjected to waste heat recovery by the first group of flue gas waste heat recovery components, the flue gas is mixed and then subjected to waste heat recovery by the second group of flue gas waste heat recovery components, so that the temperature difference of the flue gas at each position in the flue gas delivery pipe 1 is small. Furthermore, when the multiple flue gas waste heat recovery pipes 16 of the flue gas waste heat recovery components perform waste heat recovery, hot water with a consistent temperature can be generated.

[0024] Furthermore, positioning rods 114 are connected to the two side cavity surfaces of the flue gas flow cavity 112 opened in the flue gas waste heat recovery housing 14, and the flue gas waste heat recovery housing 14 is fixedly connected to the input outer pipe 161 through the positioning rods 114. Arc-shaped diversion cavities 113 are opened on the upper and lower cavity surfaces of the flue gas flow cavity 112. The flue gas waste heat recovery pipe 16 can be fixedly connected in a suspended state inside the flue gas waste heat recovery housing 14 through the positioning rods 114, so that the flue gas can flow smoothly in the flue gas flow cavity 112. When the flue gas flows in the flue gas flow cavity 112, part of the flue gas will flow into the arc-shaped diversion cavity 113. The flue gas flow cavity 112 and the arc-shaped diversion cavity 113 form a structure similar to a Tesla valve, so as to slow down the flow rate of the flue gas, and further enable the flue gas to better exchange heat with the cold water in the input outer pipe 161.

[0025] As Figure 1 、 Figures 10 to 15 shown, one end of the waste hot water flow inner pipe 26 close to the waste hot water discharge pipe 6 is connected with a cold water input branch pipe 27. The cold water input branch pipe 27 is communicated with the inner cavity 261, and multiple cold water input branch pipes 27 are communicated with the waste hot water waste heat recovery cold water input pipe 22. The other end of the waste hot water flow inner pipe 26 far from the waste hot water discharge pipe 6 is connected with a hot water output branch pipe 28. The hot water output branch pipe 28 is communicated with the inner cavity 261, and multiple hot water output branch pipes 28 are communicated with the waste hot water waste heat recovery hot water output pipe 23. In this way, cold water can be transported to the waste hot water waste heat recovery components through the waste hot water waste heat recovery cold water input pipe 22, and then the cold water can be respectively transported to the waste hot water flow inner pipe 26 through the cold water input branch pipes 27. When the cold water flows in the waste hot water flow inner pipe 26, it can exchange heat with the waste hot water outside the waste hot water flow inner pipe 26, and the generated hot water can flow out from the hot water output branch pipe 28 and be gathered and discharged through the waste hot water waste heat recovery hot water output pipe 23, realizing the waste heat recovery of the waste hot water discharged from the waste hot water discharge pipe 6.

[0026] Further, a spiral guide plate 29 is connected at the gap between the waste hot water flow inner pipe 26 and the waste hot water flow outer pipe 25, which can enable the waste hot water entering the gap between the waste hot water flow inner pipe 26 and the waste hot water flow outer pipe 25 to flow in a spiral trajectory under the action of the spiral guide plate 29, thereby delaying the flow rate of the waste hot water and enabling the waste hot water to better exchange heat with the cold water in the inner cavity 261.

[0027] Further, a forward guide baffle 210 and a reverse guide baffle 211 are connected in the water passage 262 of the waste hot water flow inner pipe 26. The installation positions of the forward guide baffle 210 and the reverse guide baffle 211 are arranged in sequence along the flow direction of the waste hot water in the water passage 262. When the waste hot water flows in the water passage 262, the forward guide baffle 210 can make the waste hot water turn clockwise during flow, and the reverse guide baffle 211 can make the waste hot water turn counterclockwise, that is, it can form multiple agitations of the waste hot water flowing in the water passage 262 to achieve maximum heat exchange between the waste hot water in the water passage 262 and the cold water in the inner cavity 261.

[0028] Such as Figure 1 , Figure 2 , Figure 10 and Figure 16As shown in the figure, the hot water regulation output assembly includes a primary hot water output pipe 9, a secondary hot water output pipe 92, a tertiary hot water output pipe 93, and a valve assembly 94. The waste hot water waste heat recovery hot water output pipe 23 is connected to the primary hot water output pipe 9. One of the flue gas waste heat recovery hot water output pipes 13 close to the flue gas discharge pipe 5 is connected to the secondary hot water output pipe 92, and the other flue gas waste heat recovery hot water output pipe 13 far from the flue gas discharge pipe 5 is connected to the tertiary hot water output pipe 93. A hot water diversion pipe 91 is connected between the primary hot water output pipe 9, the secondary hot water output pipe 92, and the tertiary hot water output pipe 93. A valve assembly 94 is installed on the hot water diversion pipe 91. The valve assembly 94 includes a primary hot water three-way valve 941, a secondary hot water three-way valve 942, and a tertiary hot water on-off valve 943. The primary hot water three-way valve 941 is installed at the connection part of the primary hot water output pipe 9 and the hot water diversion pipe 91. The secondary hot water three-way valve 942 is installed at the connection part of the secondary hot water output pipe 92 and the hot water diversion pipe 91. The tertiary hot water on-off valve 943 is installed at the connection part of the tertiary hot water output pipe 93 and the hot water diversion pipe 91. Temperature sensors 8 are installed on the pipe bodies of the waste hot water waste heat recovery hot water output pipe 23 and the flue gas waste heat recovery hot water output pipe 13. The temperature sensors 8 and the valve assembly 94 are both in signal transmission connection with an external control terminal, so as to be able to monitor the temperature of the hot water output from the waste hot water waste heat recovery hot water output pipe 23 and the two flue gas waste heat recovery hot water output pipes 13 through the temperature sensors 8, and to realize the diversion of hot water by controlling the opening and closing of each valve of the valve assembly 94 for the hot water diversion pipe 91, so that the hot water within a specific temperature range can converge to the same hot water output pipe for output.

[0029] Working principle: The heat in the flue gas discharged from the flue gas discharge pipe 5 is initially recovered by the flue gas waste heat recovery component in the flue gas transmission pipe 1. When the flue gas discharged from the flue gas discharge pipe 5 enters the flue gas transmission pipe 1, the flue gas will flow into the flue gas flow cavity 112 opened in the flue gas waste heat recovery housing 14 respectively. At the same time, cold water is input into the input outer pipe 161 of the flue gas waste heat recovery pipe 16. The cold water exchanges heat with the flue gas in the flue gas flow cavity 112 through the pipe wall of the input outer pipe 161, and then the heat in the flue gas can be recovered into the cold water in the input outer pipe 161, and the flue gas in the flue gas flow cavity 112 is recovered of waste heat. And because the output inner pipe 162 is sleeved in the input outer pipe 161, the flow space of the cold water in the input outer pipe 161 is the gap between the output inner pipe 162 and the input outer pipe 161. Therefore, it can be ensured that during the flow of the cold water, there is no cold water at the center position of the pipe, and thus the hot water near the pipe wall that has been heated and the cold water at the center of the pipe can be prevented from exchanging heat, that is, it can ensure that the heated hot water maintains a relatively high temperature to meet the use requirements of high-temperature hot water. And by setting two groups of flue gas waste heat recovery components, the flue gas can be recovered of waste heat twice, that is, the maximum recovery of waste heat can be achieved, and the hot water generated by the recovery of waste heat on both sides can have different temperatures to meet different use requirements, without the need for water temperature adjustment during subsequent use. Then, the air source heat pump 3 is used to recover the remaining heat in the flue gas for the second time. Through the two-time waste heat recovery, the heat in the flue gas generated by the steam generator can be recovered more thoroughly; The waste heat in the waste hot water discharged from the waste hot water discharge pipe 6 is initially recovered by the waste hot water waste heat recovery component in the waste hot water waste heat recovery pipe 2. Through the combined action of the positioning disc 24 and the waste hot water flow outer pipe 25, the waste hot water entering the waste hot water waste heat recovery pipe 2 can only flow in the waste hot water flow outer pipe 25. And the waste hot water flow inner pipe 26 is sleeved in the waste hot water flow outer pipe 25, and the waste hot water flow inner pipe 26 is provided with a water passage 262. Therefore, the waste hot water can flow through the gap between the waste hot water flow outer pipe 25 and the waste hot water flow inner pipe 26 and the water passage 262 of the waste hot water flow inner pipe 26. When cold water is injected into the inner cavity 261 opened in the pipe body of the waste hot water flow inner pipe 26, the waste hot water can exchange heat with the cold water through the inner and outer side walls of the waste hot water flow inner pipe 26, ensuring the maximum recovery of the waste heat of the waste hot water. And because there are multiple waste hot water flow outer pipes 25 and waste hot water flow inner pipes 26, the waste heat recovery of hot water can be realized in a small unit range, further improving the waste heat recovery efficiency of the waste hot water. Then, the hot water source heat pump 4 is used to recover the remaining heat in the waste hot water for the second time. Through the two-time waste heat recovery, the heat in the bathing waste hot water can be recovered more thoroughly; The temperature of the hot water output from the waste hot water waste heat recovery hot water output pipe 23 and the two flue gas waste heat recovery hot water output pipes 13 is monitored by the temperature sensor 8, and the diversion of the hot water can be realized by controlling the opening and closing of each valve of the valve assembly 94 for the hot water diversion pipe 91, so that the hot water within a specific temperature range can converge to the same hot water output pipe for output.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system, comprising a flue gas conveying pipe (1), a waste water waste heat recovery pipe (2), an air source heat pump (3), a hot water source heat pump (4), a flue gas discharge pipe (5) and a waste water discharge pipe (6), characterized in that: One end of the flue gas conveying pipe (1) is connected to the flue gas discharge pipe (5), the other end of the flue gas conveying pipe (1) is connected to the air source heat pump (3), one end of the waste hot water waste heat recovery pipe (2) is connected to the waste hot water discharge pipe (6), the other end of the waste hot water waste heat recovery pipe (2) is connected to the hot water source heat pump (4), a flue gas waste heat recovery component is arranged inside the flue gas conveying pipe (1), and a waste hot water waste heat recovery component is arranged inside the waste hot water waste heat recovery pipe (2); Two groups of the flue gas waste heat recovery components are arranged in the flue gas conveying pipe (1), and the two groups of the flue gas waste heat recovery components are arranged in sequence along the flow direction of the flue gas in the flue gas conveying pipe (1). The flue gas waste heat recovery components include a flue gas waste heat recovery shell (14) and a flue gas waste heat recovery pipe (16). The flue gas waste heat recovery shell (14) is fixedly connected to the inner wall of the flue gas conveying pipe (1), and the flue gas waste heat recovery shell (14) is provided with a plurality of flue gas A flow cavity (112), a plurality of flue gas waste heat recovery pipes (16) are provided, and the flue gas waste heat recovery pipes (16) are respectively fixedly connected in the flue gas flow cavity (112), the flue gas waste heat recovery pipe (16) comprises an input outer pipe (161) and an output inner pipe (162), the output inner pipe (162) is sleeved in the input outer pipe (161), and the pipe body of the output inner pipe (162) is fixedly connected to one end of the input outer pipe (161); The waste hot water waste heat recovery component comprises a positioning plate (24), a waste hot water flow outer tube (25) and a waste hot water flow inner tube (26); the positioning plate (24) is fixedly connected to the inner wall of the waste hot water waste heat recovery tube (2), and the installation position of the positioning plate (24) is respectively located at the two ends of the waste hot water waste heat recovery tube (2); a plurality of waste hot water flow outer tubes (25) are provided, and the two ends of the waste hot water flow outer tube (25) are respectively connected to the plate body of the positioning plate (24); the waste hot water flow inner tube (26) is fixedly sleeved in the waste hot water flow outer tube (25); the two ends of the waste hot water flow inner tube (26) are located in an outward convex shape on the outside of the waste hot water flow outer tube (25); the tube body of the waste hot water flow inner tube (26) is provided with an inner cavity (261); and the waste hot water flow inner tube (26) is provided with a water channel (262); The flue gas conveying pipe (1) is fixedly connected to a flue gas waste heat recovery cold water input pipe (12) and a flue gas waste heat recovery hot water output pipe (13); the flue gas waste heat recovery cold water input pipe (12) is connected to the cold water input end of the flue gas waste heat recovery component; the flue gas waste heat recovery hot water output pipe (13) is connected to the hot water output end of the flue gas waste heat recovery component; the waste hot water waste heat recovery cold water input pipe (22) and a waste hot water waste heat recovery hot water output pipe (23) are fixedly connected to the waste hot water waste heat recovery pipe (22); the waste hot water waste heat recovery cold water input pipe (22) is connected to the cold water input end of the waste hot water waste heat recovery component; the waste hot water waste heat recovery hot water output pipe (23) is connected to the hot water output end of the waste hot water waste heat recovery component; the output ends of the flue gas waste heat recovery hot water output pipe (13) and the waste hot water waste heat recovery hot water output pipe (23) are connected to a hot water control output component.

2. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 1 is characterized by: The end of the flue gas delivery pipe (1) away from the flue gas discharge pipe (5) is connected to a flue gas guiding pipe (11), and the flue gas guiding pipe (11) is connected to an input end interface of the air source heat pump (3); the end of the waste hot water waste heat recovery pipe (2) away from the waste hot water discharge pipe (6) is connected to a waste hot water guiding pipe (21), and the waste hot water guiding pipe (21) is connected to an input end interface of the hot water source heat pump (4), so that the flue gas discharged from the flue gas discharge pipe (5) after waste heat recovery by the flue gas waste heat recovery component can be guided to the air source heat pump (3) through the flue gas guiding pipe (11).

3. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 2 is characterized by: One end of the smoke delivery pipe (1) that is butted against the smoke exhaust pipe (5) and the other end of the smoke delivery pipe (1) that is butted against the smoke guide pipe (11) are both provided with a butt joint plate (7), and one end of the waste hot water waste heat recovery pipe (2) that is butt joint against the hot water source heat pump (4) and one end of the waste hot water waste heat recovery pipe (2) that is butt joint against the waste hot water guide pipe (21) are also both provided with a butt joint plate (7), and a plurality of butt joint bolts (71) are threadedly connected to the butt joint plate (7); It should be noted that a sealing gasket is provided on the docking surface of the docking plate (7), and the installation orientation of the docking bolts (71) is forward and reverse offset installation.

4. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 3 is characterized by: A cold water connecting branch pipe (17) is connected between the input outer pipes (161) of two adjacent flue gas waste heat recovery pipes (16), a hot water connecting branch pipe (18) is connected between the output inner pipes (162) of the upper and lower flue gas waste heat recovery pipes (16), and the bottom ends of the plurality of hot water connecting branch pipes (18) are connected to a hot water converging pipe (110); One of the cold water connecting branches (17) is connected to a cold water input interface (19), the cold water input interface (19) is connected to a flue gas waste heat recovery cold water input pipe (12), the pipe body of the flue gas waste heat recovery cold water input pipe (12) is located above the flue gas conveying pipe (1), the hot water confluence pipe (110) is connected to a hot water output interface (111), the hot water output interface (111) is connected to a flue gas waste heat recovery hot water output pipe (13), the pipe body of the flue gas waste heat recovery hot water output pipe (13) is located below the flue gas conveying pipe (1); A plurality of annular inclined baffles (163) are connected to the inner wall of the input outer tube (161), and the inclination direction of the annular inclined baffles (163) is consistent with the flow direction of cold water in the input outer tube (161).

5. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 4 is characterized by: A mesh plate (15) is fixedly connected inside the flue gas conveying pipe (1), and the mesh plate (15) is installed between two flue gas waste heat recovery shells (14).

6. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 5 is characterized by: Positioning rods (114) are connected to the cavity surfaces on both sides of the smoke flow cavity (112) provided in the smoke waste heat recovery shell (14), and the smoke waste heat recovery shell (14) is fixedly connected to the input outer pipe (161) via the positioning rods (114), and the upper and lower cavity surfaces of the smoke flow cavity (112) are provided with arc-surface diversion cavities (113).

7. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 1 is characterized by: One end of the waste hot water flow inner tube (26) close to the waste hot water discharge pipe (6) is connected to a cold water input branch pipe (27), the cold water input branch pipe (27) is in communication with the inner cavity (261), and a plurality of the cold water input branch pipes (27) are in communication with the waste hot water residual heat recovery cold water input pipe (22), and the other end of the waste hot water flow inner tube (26) away from the waste hot water discharge pipe (6) is connected to a hot water output branch pipe (28), the hot water output branch pipe (28) is in communication with the inner cavity (261), and a plurality of the hot water output branch pipes (28) are in communication with the waste hot water residual heat recovery hot water output pipe (23).

8. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 7 is characterized by: A spiral guide plate (29) is connected to the gap between the waste hot water flow inner pipe (26) and the waste hot water flow outer pipe (25).

9. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 8 is characterized by: A forward flow guide baffle (210) and a reverse flow guide baffle (211) are connected to the water passage (262) of the waste hot water flow inner tube (26), and the installation positions of the forward flow guide baffle (210) and the reverse flow guide baffle (211) are arranged in sequence along the flow direction of the waste hot water in the water passage (262).

10. The steam generator waste heat recovery, bathing waste water heat pump and air source heat pump combined hot water production system according to claim 1 is characterized by: The hot water control output component comprises a primary hot water output pipe (9), a secondary hot water output pipe (92), a tertiary hot water output pipe (93) and a valve component (94); the waste hot water waste heat recovery hot water output pipe (23) is connected to the primary hot water output pipe (9); one of the flue gas waste heat recovery hot water output pipes (13) close to the flue gas discharge pipe (5) is connected to the secondary hot water output pipe (92); another flue gas waste heat recovery hot water output pipe (13) far from the flue gas discharge pipe (5) is connected to the tertiary hot water output pipe (93); a hot water guide pipe (91) is connected between the primary hot water output pipe (9), the secondary hot water output pipe (92) and the tertiary hot water output pipe (93); a valve component (94) is installed on the hot water guide pipe (91); and the valve component (94) The hot water outlet pipe comprises a first-level hot water three-way valve (941), a second-level hot water three-way valve (942) and a third-level hot water on-off valve (943). The first-level hot water three-way valve (941) is installed at the connection position between the first-level hot water output pipe (9) and the hot water guide pipe (91). The second-level hot water three-way valve (942) is installed at the connection position between the second-level hot water output pipe (92) and the hot water guide pipe (91). The third-level hot water on-off valve (943) is installed at the connection position between the third-level hot water output pipe (93) and the hot water guide pipe (91). The waste hot water waste heat recovery hot water output pipe (23) and the flue gas waste heat recovery hot water output pipe (13) are both installed with temperature sensors (8). The temperature sensor (8) and the valve assembly (94) are both connected to the control terminal of the external device for signal transmission.

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