Steam heating condensation water waste heat recovery device and system

Abstract

The invention discloses a steam heating condensation water waste heat recovery device and system.The steam heating condensation water waste heat recovery device comprises a low-temperature condensation water tank and a high-temperature condensation water tank which are sequentially arranged from top to bottom in the gravity direction, and the low-temperature condensation water tank is provided with a first water inlet and a first water outlet; the high-temperature condensation water tank is provided with a second water inlet and a second water outlet, a heat insulation partition plate is arranged between the low-temperature condensation water tank and the high-temperature condensation water tank, a plurality of gravity assisted heat pipes arranged in an array mode are arranged on the heat insulation partition plate, and each gravity assisted heat pipe comprises a condensation section, a heat insulation section and an evaporation section from top to bottom in the gravity direction. The length of the heat insulation section coincides with the thickness of the heat insulation partition plate. The evaporation section is located in the high-temperature condensation water tank. The gravity assisted heat pipe is of a hollow closed structure, and working liquid is contained in the gravity assisted heat pipe. The heat exchange efficiency is high, heat of condensed water can be fully utilized, and the water attack phenomenon is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of steam heating condensate treatment, and in particular to a steam heating condensate waste heat recovery device and system. Background Art

[0002] Steam heating has been widely used in industrial and civil fields. Condensation water is inevitably produced during the steam heating process. This condensation water is often a high-temperature steam-water mixture. In all industries that use steam heating, water vapor is widely used as a carrier of heat energy. Steam turns into condensed water (also called condensed water or condensate) when the heat equipment releases the latent heat of condensation. The heat energy of condensed water accounts for about 15%-38% of the total energy of steam. Recovering the heat energy and water resources of condensed water is of great significance to energy conservation and emission reduction.

[0003] For large-scale comprehensive buildings, there may be multiple heat utilization methods with different requirements for supply and return water temperatures. Therefore, the temperature of high-temperature condensate water can be gradually reduced through multi-stage steam heat exchange.

[0004] However, for buildings with a single function, when the heat is used in a single way, it is difficult to truly recycle the heat energy in the high-temperature condensate. In theory, when the drainage temperature is higher than 40°C, heat recovery should be given priority. When it is impossible or unreasonable to recycle, a cooling pool should be set up when the water temperature at the inlet detection well of the urban drainage pipe is higher than 40°C. The common steam condensate temperature is as high as 80°C-90°C. The condensate is connected to the cooling pool to cool to 40°C-60°C before being discharged from the building, but this method actually wastes high-temperature condensate resources.

[0005] The high-temperature condensate in the steam heating system has the advantages of sufficient heat and clean water quality. Therefore, it is necessary to recycle the high-temperature condensate in the steam heating system to promote energy conservation, emission reduction and sustainable development.

[0006] The prior art provides a municipal steam condensate recovery and utilization system (CN216954118U), which includes a steam pipeline, a pressure reducing and cooling valve group, a steam cylinder, a heat exchange unit, a high-temperature condensate tank, a low-temperature condensate tank, and a volumetric heat exchanger.

[0007] Municipal steam enters the steam cylinder after being decompressed by the pressure reducing and cooling valve group; the steam cylinder transports the steam into the heat exchanger unit twice through different branches; the high-temperature condensate of the steam cylinder and the heat exchanger unit enters the high-temperature condensate tank through its back pressure; the high-temperature condensate in the high-temperature condensate tank is transported to the volumetric heat exchanger through the condensate pump, and heat exchange is carried out with the tap water in the volumetric heat exchanger; the tap water that has completed the heat exchange enters the low-temperature condensate tank through the condensate pipe and the condensate drain valve group; the condensate in the low-temperature condensate tank is transported to domestic water through pipes. This technology makes the hot water in the steam cylinder enter the heat exchanger unit twice, and recycles it twice, which makes more effective use of the energy of condensate than the traditional steam condensate recovery system.

[0008] However, the technical solution requires that the condensate temperature in the high-temperature condensate tank be 90°C. However, it is uncertain whether the municipal steam has been fully heat exchanged after two heat exchangers. Therefore, after two heat exchanges, it is possible that a steam-water mixture enters the high-temperature condensate tank, which may cause water hammer. In this technical solution, the two heat exchangers are connected in parallel, which is actually a single heat exchange, and cascade heat exchange is not achieved. In addition, there are many condensate recovery devices, the machine room occupies a large area, and the economic cost is high.

[0009] Therefore, it is necessary to propose a steam heating condensate waste heat recovery device and system to solve at least one of the above problems. Summary of the invention

[0010] In view of the defects existing in the prior art, a steam heating condensate waste heat recovery device and system are provided in an embodiment of the present invention, which has high heat exchange efficiency, can fully utilize the heat of the condensate, and will not cause water hammer.

[0011] The specific technical solution of the implementation mode of the present invention is:

[0012] A steam heating condensate waste heat recovery device, the steam heating condensate waste heat recovery device comprising: a low-temperature condensate water tank and a high-temperature condensate water tank arranged in sequence from top to bottom along the direction of gravity, the low-temperature condensate water tank is provided with a first water inlet and a first water outlet, the high-temperature condensate water tank is provided with a second water inlet and a second water outlet, an insulating partition is provided between the low-temperature condensate water tank and the high-temperature condensate water tank, a plurality of array-arranged gravity heat pipes are arranged on the insulating partition, the gravity heat pipe comprises from top to bottom along the direction of gravity: a condensation section, an insulating section and an evaporation section, The condensing section is located in the low-temperature condensing water tank, the length of the insulating section coincides with the thickness of the insulating partition, and the evaporating section is located in the high-temperature condensing water tank; the gravity heat pipe is a hollow closed structure, and the gravity heat pipe contains a working liquid. When the evaporating section is heated in the high-temperature condensing water tank, the working liquid in the gravity heat pipe vaporizes and evaporates to form steam, and the steam flows to the condensing section and exchanges heat with the cold water in the low-temperature condensing water tank. After the heat exchange, the working liquid is condensed and liquefied, and then flows back to the evaporating section by gravity.

[0013] In a preferred embodiment, the first water inlet and the first water outlet are located at two opposite corners of the low-temperature condensation water tank.

[0014] In a preferred embodiment, the second water inlet and the second water outlet are located at two opposite corners of the high-temperature condensate water tank.

[0015] In a preferred embodiment, the gravity heat pipe is made of an anti-corrosion material, and the anti-corrosion material includes: ceramic.

[0016] In a preferred embodiment, a predetermined gap is formed between two adjacent gravity heat pipes to ensure that the water flow passing through the gravity heat pipes is in a turbulent state.

[0017] In a preferred embodiment, the steam heating condensate waste heat recovery device also includes an overflow pipe and a drain pipe, one end of the drain pipe is connected to the bottom of the high-temperature condensate water tank, and the overflow pipe has a first overflow end extending into the low-temperature condensate water tank and a second overflow end extending into the high-temperature condensate water tank, and the first overflow end and the second overflow end are both connected to the drain pipe.

[0018] A steam heating condensate waste heat recovery system comprises any of the steam heating condensate waste heat recovery devices described above.

[0019] In a preferred embodiment, the first water inlet is also connected to a first water inlet pipe, which is used to connect to a normal temperature water supply end, and the normal temperature water supply end includes any one of the following or a combination thereof: normal temperature domestic tap water or purified rainwater, grey water; the first water outlet is also connected to a first water outlet pipe, and a valve is provided on the first water outlet pipe, and the valve is used to adjust the output flow of the first water outlet pipe.

[0020] In a preferred embodiment, the second water inlet is also connected to a second water inlet pipe, and the second water inlet pipe is used to connect the high-temperature condensate water of the steam heating system; the second water outlet is also connected to a second water outlet pipe, and a steam trap is arranged on the second water outlet pipe. A steam return pipe is also arranged between the steam trap and the high-temperature condensate water tank, and the steam trap is used to separate the fluid flowing out of the second water outlet into gas and liquid, and the separated steam flows into the steam return pipe, and the separated water flows into the second water outlet pipe downstream of the steam trap.

[0021] In a preferred embodiment, the steam heating condensate waste heat recovery device also includes: an auxiliary heating device, the first water outlet is also connected to a first water outlet pipe, the second water outlet is also connected to a second water outlet pipe, and the outlet ends of the first water outlet pipe and the second water outlet pipe are both connected to the auxiliary heating device.

[0022] In a preferred embodiment, the steam heating condensate waste heat recovery device further includes a temperature control device, and the temperature control device is used to adjust the outlet water temperature.

[0023] In a preferred embodiment, the first water inlet is also connected to a first water inlet pipe, the second water inlet is also connected to a second water inlet pipe, the first water inlet pipe is provided with a first flow regulating valve group, and the second water inlet pipe is provided with a second flow regulating valve group.

[0024] The technical solution of the present invention has the following significant beneficial effects:

[0025] The steam heating condensate waste heat recovery device provided in the embodiment of the present application is provided by sequentially arranging a low-temperature condensate water tank, an insulating baffle, and a high-temperature condensate water tank along the direction of gravity, and arranging a gravity heat pipe that passes through the low-temperature condensate water tank, the insulating baffle, and the high-temperature condensate water tank. The gravity heat pipe is used to transfer the heat in the high-temperature condensate water tank to the low-temperature condensate water tank. On the whole, after the steam heating condensate waste heat recovery device enters from the first water inlet and the second water inlet, the internal space of the box body is large, the flow rate can be effectively slowed down, and it can fully exchange heat with the gravity heat pipe. The overall heat exchange efficiency is high, the heat of the condensate can be fully utilized, and the water hammer phenomenon that is easy to occur in the shell and tube heat exchanger can be avoided.

[0026] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0028] Figure 1 This is a schematic structural diagram of a steam heating condensate waste heat recovery device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of a steam heating condensate waste heat recovery system provided in an embodiment of the present application;

[0030] Figure 3 This is a flow chart of a steam heating condensate waste heat recovery system provided in an embodiment of the present application.

[0031] Reference numerals of the present application:

[0032] 1. The first water inlet pipe;

[0033] 2. The first flow regulating valve group;

[0034] 3. The first water outlet pipe;

[0035] 4. Second water inlet pipe;

[0036] 5. The second flow regulating valve group;

[0037] 6. Second water outlet pipe;

[0038] 7. Steam heating condensate waste heat recovery device;

[0039] 71. Low temperature condensation water tank;

[0040] 72. High temperature condensation water tank;

[0041] 8. Overflow pipe;

[0042] 9. Drain pipe;

[0043] 10. Steam reflux pipe;

[0044] 11. Steam trap;

[0045] 12. Valve;

[0046] 13. Auxiliary heating device;

[0047] 14. Water pump;

[0048] 701, first water inlet;

[0049] 702, first water outlet;

[0050] 703, second water inlet;

[0051] 704, second water outlet;

[0052] 705, first box;

[0053] 706, second box;

[0054] 707, scheduled gap;

[0055] 708. Gravity heat pipe;

[0056] 709. Insulating partition. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0058] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0060] The present invention provides a steam heating condensate waste heat recovery device and system, which has high heat exchange efficiency, can fully utilize the heat of condensate, and will not produce water hammer phenomenon.

[0061] Please refer to Figure 1 to Figure 2 In the embodiment of the present application, a steam heating condensate waste heat recovery device 7 is provided. The steam heating condensate waste heat recovery device 7 may include: a low-temperature condensate water tank 71 and a high-temperature condensate water tank 72 arranged in sequence from top to bottom along the gravity direction, the low-temperature condensate water tank 71 is provided with a first water inlet 701 and a first water outlet 702, the high-temperature condensate water tank 72 is provided with a second water inlet 703 and a second water outlet 704, the low-temperature condensate water tank 71 and the high-temperature condensate water tank 72 are provided with a second water inlet 703 and a second water outlet 704, An insulating baffle 709 is provided between the condensation water tanks 72, and a plurality of array-arranged gravity heat pipes 708 are arranged on the insulating baffle 709. The gravity heat pipe 708 includes: a condensation section, an insulation section and an evaporation section from top to bottom along the gravity direction. The condensation section is located in the low-temperature condensation water tank 71, and the length of the insulation section coincides with the thickness of the insulating baffle 709. The evaporation section is located in the high-temperature condensation water tank 72; the gravity heat pipe 708 is a hollow closed structure. The gravity heat pipe 708 contains working liquid. When the evaporation section is heated in the high-temperature condensation water tank 72, the working liquid in the gravity heat pipe 708 vaporizes and evaporates to form steam. The steam flows to the condensation section and exchanges heat with the cold water in the low-temperature condensation water tank 71. The working liquid after heat exchange is condensed and liquefied, and then flows back to the evaporation section by gravity.

[0062] The steam heating condensate waste heat recovery device 7 provided in the embodiment of the present application mainly includes: a low-temperature condensate water tank 71, an insulating baffle 709, a high-temperature condensate water tank 72 and a gravity heat pipe 708. Among them, the low-temperature condensate water tank 71 is located at the upper part, and it includes a hollow first box body 705, and the first box body 705 is provided with a first water inlet 701 and a first water outlet 702. The high-temperature condensate water tank 72 is located at the lower part, and it includes a hollow second box body 706, and the second box body 706 is provided with a second water inlet 703 and a second water outlet 704. An insulating baffle 709 is provided between the low-temperature condensate water tank 71 and the high-temperature condensate water tank 72 to prevent the two from exchanging heat on the contact surface. Among them, the first box body 705 and the second box body 706 can be square in shape. Of course, the structure of the water tank is not limited to the above example, and it can also be other shapes, which is not specifically limited in this application.

[0063] The insulating baffle 709 is provided with a plurality of openings, which are used to seal and penetrate the gravity heat pipe 708. Of course, openings corresponding to the opening positions on the insulating baffle 709 are also provided at the bottom of the low-temperature condensation water tank 71 and the top of the high-temperature condensation water tank 72, which are also used to seal and penetrate the gravity heat pipe 708. Specifically, the number of the openings can be multiple, and the multiple openings can be distributed on the insulating baffle 709 in an array arrangement. In addition, the size and shape of the openings can match the outer contour of the gravity heat pipe 708.

[0064] The gravity heat pipe 708 may include, from top to bottom along the gravity direction: a condensation section, an insulation section, and an evaporation section. The condensation section is located in the low-temperature condensation water tank 71. The evaporation section is located in the high-temperature condensation water tank 72. The length of the insulation section coincides with the thickness of the insulation baffle 709.

[0065] The gravity heat pipe 708 is a hollow closed structure, and a working liquid is contained in the gravity heat pipe 708. When the evaporation section is heated in the high-temperature condensation water tank 72, the working liquid in the gravity heat pipe 708 is vaporized and evaporated to form steam, and the steam flows to the condensation section to exchange heat with the cold water in the low-temperature condensation water tank 71. After the heat exchange, the working liquid is condensed and liquefied, and then flows back to the evaporation section by gravity, thus completing a cycle.

[0066] The insulation section is mainly used to prevent the steam formed in the evaporation section of the gravity heat pipe 708 from liquefying before reaching the condensation section. The length of the insulation section (i.e., the thickness of the insulation baffle 709) can be determined comprehensively based on the material, performance and other factors of the insulation baffle 709, and the present application does not make any specific limitation here.

[0067] The length and number of the gravity heat pipe 708 can be determined comprehensively based on the target heat recovery of the steam heating condensate waste heat recovery device 7 and the water tank size, the condensate flow rate and temperature, the allowable operating temperature of the heat pipe and the corresponding allowable operating pressure. The diameter of the gravity heat pipe 708 can be selected based on the Mach number in the pipe with the carrying limit and the speed of sound limit. Specifically, the specific length, number of roots, and diameter of the gravity heat pipe 708 are not specifically limited in this application.

[0068] The steam heating condensate waste heat recovery device 7 provided in the embodiment of the present application is provided with a low-temperature condensate water tank 71, an insulating baffle 709, and a high-temperature condensate water tank 72 in sequence along the direction of gravity, and a gravity heat pipe 708 is provided which passes through the low-temperature condensate water tank 71, the insulating baffle 709, and the high-temperature condensate water tank 72. The gravity heat pipe 708 is used to transfer the heat in the high-temperature condensate water tank 72 to the low-temperature condensate water tank 71. On the whole, after the steam heating condensate water waste heat recovery device 7 enters from the first water inlet 701 and the second water inlet 703, the internal space of the box body is large, the flow rate can be effectively slowed down, and it can fully exchange heat with the gravity heat pipe 708. The overall heat exchange efficiency is high, the heat of the condensate water can be fully utilized, and the water hammer phenomenon that is easy to occur in the shell and tube heat exchanger can be avoided.

[0069] In one embodiment, the first water inlet 701 and the first water outlet 702 are located at two opposite corners of the low-temperature condensation water tank 71 .

[0070] In this embodiment, by distributing the first water inlet 701 and the first water outlet 702 at the diagonals on both sides of the low-temperature condensation water tank 71, the water flow in the low-temperature condensation water tank 71 is made to flow in a "Z" shape, which can effectively prevent the fluid short-circuit problem caused by the arrangement of the inlet and outlet on the same side, and take into account the full use of the density difference of water (the density of hot water is less than that of cold water) to enhance the heat exchange effect.

[0071] In one embodiment, the second water inlet 703 and the second water outlet 704 are located at two opposite corners of the high-temperature condensate water tank 72 .

[0072] In this embodiment, by distributing the second water inlet 703 and the second water outlet 704 at the diagonals on both sides of the high-temperature condensation water tank 72, the water flow in the high-temperature condensation water tank 72 is made to flow in a "Z" shape, which can effectively prevent the fluid short-circuit problem caused by the arrangement of the inlet and outlet on the same side, and take into account the full use of the density difference of water (the density of hot water is less than that of cold water) to enhance the heat exchange effect.

[0073] In one embodiment, the material of the gravity heat pipe 708 is an anti-corrosion material, and the anti-corrosion material includes: ceramic. Since the gravity heat pipe 708 is located in the low-temperature condensation water tank 71 and the high-temperature condensation water tank 72 and is in contact with the fluid in the low-temperature condensation water tank 71 and the high-temperature condensation water tank 72 for a long time, in order to avoid corrosion, the outer shell material of the gravity heat pipe 708 is selected from anti-corrosion materials. Specifically, anti-corrosion materials such as ceramics can be used. When the gravity heat pipe 708 is made of ceramic material, on the one hand, the ceramic material has better anti-corrosion performance, and on the other hand, the heat exchange performance of the ceramic material is also better. Of course, the gravity heat pipe 708 can also use other types of anti-corrosion materials, which are not limited to the above description. The technicians in the relevant field may make other changes under the inspiration of the technical essence of this application, but as long as the functions and effects achieved are the same or similar to those of this application, they should be covered within the scope of protection of this application.

[0074] In one embodiment, a predetermined gap 707 is formed between two adjacent gravity heat pipes 708 to ensure that the water flowing through the gravity heat pipes 708 is in a turbulent state.

[0075] In this embodiment, a plurality of gravity heat pipes 708 may be arranged in an array arrangement, and a predetermined gap 707 may be provided between two adjacent gravity heat pipes 708. The predetermined gap 707 is used to ensure that the water flowing through the gravity heat pipe 708 is in a turbulent state, and the water flow Reynolds number Re is at a large value (e.g., greater than 4000) to ensure a better heat exchange effect. Specifically, the predetermined gap 707 may be set according to the state of the fluid in the box, the heat exchange requirements, etc., and the present application does not limit its value exclusively.

[0076] In one embodiment, the steam heating condensate waste heat recovery device 7 may also include an overflow pipe 8 and a drain pipe 9, one end of the drain pipe 9 is connected to the bottom of the high-temperature condensate water tank 72, and the overflow pipe 8 has a first overflow end extending into the low-temperature condensate water tank 71 and a second overflow end extending into the high-temperature condensate water tank 72, and the first overflow end and the second overflow end are both connected to the drain pipe 9.

[0077] like Figure 1 As shown, in this embodiment, in order to prevent the water in the low-temperature condensation water tank 71 and the high-temperature condensation water tank 72 from overflowing, openings can be distributed near the top of the low-temperature condensation water tank 71 and the high-temperature condensation water tank 72. A first overflow end and a second overflow end are respectively arranged at the opening positions, and are discharged to the outside through an overflow pipe 8. A drain pipe 9 can also be arranged at the bottom of the high-temperature condensation water tank 72 to discharge the water in the high-temperature condensation water tank 72 to the outside. In order to simplify the pipeline as much as possible, the overflow pipe 8 connecting the first overflow end and the second overflow end can be connected in parallel and merged with the drain pipe 9.

[0078] Please refer to Figure 2 and Figure 3 In the implementation mode of the present application, a steam heating condensate waste heat recovery system is also provided, and the steam heating condensate waste heat recovery system mainly includes the above-mentioned steam heating condensate waste heat recovery device 7. The steam heating condensate waste heat recovery system can achieve the technical effect achieved by the implementation mode of the steam heating condensate waste heat recovery device 7 by setting the steam heating condensate waste heat recovery device 7. For details, please refer to the specific description of the above-mentioned implementation mode, and the present application will not repeat it here.

[0079] In one embodiment, the first water inlet 701 is also connected to a first water inlet pipe 1, which is used to connect to a normal temperature water supply end, and the normal temperature water supply end includes any one of the following or a combination thereof: normal temperature domestic tap water or purified rainwater, or grey water; the first water outlet 702 is also connected to a first water outlet pipe 3, and a valve 12 is provided on the first water outlet pipe 3, and the valve 12 is used to adjust the output flow of the first water outlet pipe 3.

[0080] In this embodiment, the first water inlet 701 of the low-temperature condensate water tank 71 may be provided with a first water inlet pipe 1, and the first water inlet pipe 1 may be connected to a normal temperature water supply end. Specifically, the normal temperature water supply end may include normal temperature domestic tap water or purified rainwater, recycled water, etc. The first water outlet 702 of the low-temperature condensate water tank 71 may be provided with a first water outlet pipe 3, and a valve 12 may be provided on the first water outlet pipe 3, and the low temperature hot water heated by the heat pipe may be output after the flow rate is adjusted by the valve 12.

[0081] In one embodiment, the second water inlet 703 is also connected to a second water inlet pipe 4, and the second water inlet pipe 4 is used to connect the high-temperature condensate water of the steam heating system; the second water outlet 704 is also connected to a second water outlet pipe 6, and a steam trap 11 is provided on the second water outlet pipe 6, and a steam return pipe 10 is also provided between the steam trap 11 and the high-temperature condensate water tank 72, and the steam trap 11 is used to separate the fluid flowing out of the second water outlet 704 into gas and liquid, and the separated steam flows into the steam return pipe 10, and the separated water flows into the second water outlet pipe 6 downstream of the steam trap 11.

[0082] In this embodiment, the second water inlet 703 of the high-temperature condensate water tank 72 can be provided with a second water inlet pipe 4, and the second water inlet pipe 4 of the high-temperature condensate water tank 72 can be used to connect to the steam heating system, thereby accessing the high-temperature condensate water in the steam heating system. The second water outlet 704 of the high-temperature condensate water tank 72 is connected to the second water outlet pipe 6 of the high-temperature condensate water tank 72, and the water outlet of the high-temperature condensate water tank 72 passes through the steam trap 11 to achieve steam reflux to prevent the situation where some steam is not completely condensed. After the flow rate is adjusted by the valve 12, the high-temperature condensate water tank 72 outputs steam-free low-temperature hot water heated by the heat pipe.

[0083] Furthermore, the steam heating condensate waste heat recovery device 7 may also include: an auxiliary heat device 13, the first water outlet 702 is also connected to the first water outlet pipe 3, the second water outlet 704 is also connected to the second water outlet pipe 6, and the outlet ends of the first water outlet pipe 3 and the second water outlet pipe 6 are both connected to the auxiliary heat device 13. In addition, the steam heating condensate waste heat recovery device 7 may also include a temperature control device, which is used to adjust the outlet water temperature.

[0084] In this embodiment, the first outlet pipe 3 of the low-temperature condensate water tank 71 and the second outlet pipe 6 of the high-temperature condensate water tank 72 are connected to the auxiliary heating device 13. The auxiliary heating device 13 is controlled by the temperature control device of the water point to control the auxiliary heating temperature, and the temperature of the low-temperature hot water can be adjusted according to the actual temperature demand of the water point. All low-temperature hot water is used for garage flushing, car washing or washing water after being drained by the water pump 14 and the valve 12. Among them, the auxiliary heating device 13 can be set upstream or downstream of the water pump 14.

[0085] In one embodiment, the first water inlet 701 is further connected to a first water inlet pipe 1, the second water inlet 703 is further connected to a second water inlet pipe 4, the first water inlet pipe 1 is provided with a first flow regulating valve group 2, and the second water inlet pipe 4 is provided with a second flow regulating valve group 5. The first flow regulating valve group 2 can be used to regulate the flow in the first water inlet pipe 1, and the second flow regulating valve group 5 can be used to regulate the flow in the second water inlet pipe 4.

[0086] Among them, the steam heating condensate waste heat recovery system can also be provided with a temperature detection unit and a controller electrically connected to the temperature detection unit. The controller can be electrically connected to the above-mentioned first flow regulating valve group 2 and the second flow regulating valve group 5. The controller can adjust the flow of the first flow regulating valve group 2 and / or the second flow regulating valve group 5 according to the outlet water temperature detected by the temperature detection unit.

[0087] The steam heating condensate waste heat recovery system provided in the embodiment of the present application has the following working principle: normal temperature domestic tap water or purified rainwater, reclaimed water or other low temperature cold water is connected to the low temperature condensate tank 71 of the steam heating condensate waste heat recovery device 7 through the flow regulating valve group. The high temperature condensate water after the municipal steam in the steam heating system is heat exchanged by the heat exchange equipment is connected to the high temperature condensate tank 72 of the steam heating condensate waste heat recovery device 7 through the flow regulating valve group. The low temperature hot water output after being processed by the steam heating condensate waste heat recovery device 7 is returned through the steam trap 11 to prevent the situation where some steam is not completely condensed. All low temperature hot water is drained by the water pump 14 and the valve 12 and used for water points such as garage flushing, car washing water or washing water. A temperature control device is set at the water point to adjust the reheating temperature of the auxiliary heating device 13, so as to realize the flexible adjustment of the temperature of the low temperature hot water according to the actual temperature demand of the water point.

[0088] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0089] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0090] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A steam heating condensate waste heat recovery device, characterized in that: The steam heating condensate waste heat recovery device comprises: a low-temperature condensate water tank and a high-temperature condensate water tank arranged in sequence from top to bottom along the direction of gravity, the low-temperature condensate water tank is provided with a first water inlet and a first water outlet, the high-temperature condensate water tank is provided with a second water inlet and a second water outlet, an insulating partition is provided between the low-temperature condensate water tank and the high-temperature condensate water tank, a plurality of array-arranged gravity heat pipes are arranged on the insulating partition, the gravity heat pipe comprises: a condensation section, an insulation section and an evaporation section from top to bottom along the direction of gravity, the condensation section is located at In the low-temperature condensation water tank, the length of the insulation section coincides with the thickness of the insulation partition, and the evaporation section is located in the high-temperature condensation water tank; the gravity heat pipe is a hollow closed structure, and the gravity heat pipe contains a working liquid. When the evaporation section is heated in the high-temperature condensation water tank, the working liquid in the gravity heat pipe vaporizes and evaporates to form steam, and the steam flows to the condensation section to exchange heat with the cold water in the low-temperature condensation water tank. After the heat exchange, the working liquid is condensed and liquefied, and then flows back to the evaporation section by gravity.

2. The steam heating condensate waste heat recovery device according to claim 1, characterized in that: The first water inlet and the first water outlet are located at two opposite corners of the low-temperature condensation water tank.

3. The steam heating condensate waste heat recovery device according to claim 1, characterized in that: The second water inlet and the second water outlet are located at two opposite corners of the high-temperature condensation water tank.

4. The steam heating condensate waste heat recovery device according to claim 1, characterized in that: The material of the gravity heat pipe is an anti-corrosion material, and the anti-corrosion material includes: ceramic.

5. The steam heating condensate waste heat recovery device according to claim 1, characterized in that: A predetermined gap is formed between two adjacent gravity heat pipes to ensure that the water flowing through the gravity heat pipes is in a turbulent state.

6. The steam heating condensate waste heat recovery device according to claim 1, characterized in that: The steam heating condensate waste heat recovery device also includes an overflow pipe and a drain pipe, one end of the drain pipe is connected to the bottom of the high-temperature condensate water tank, and the overflow pipe has a first overflow end extending into the low-temperature condensate water tank and a second overflow end extending into the high-temperature condensate water tank, and the first overflow end and the second overflow end are both connected to the drain pipe.

7. A steam heating condensate waste heat recovery system, characterized in that: It comprises the steam heating condensate waste heat recovery device as described in any one of claims 1-6.

8. The steam heating condensate waste heat recovery system according to claim 7, characterized in that: The first water inlet is also connected to a first water inlet pipe, which is used to connect to a normal temperature water supply end, and the normal temperature water supply end includes any one of the following or a combination thereof: normal temperature domestic tap water or purified rainwater, grey water; the first water outlet is also connected to a first water outlet pipe, and a valve is provided on the first water outlet pipe, and the valve is used to adjust the output flow of the first water outlet pipe.

9. The steam heating condensate waste heat recovery system according to claim 7, characterized in that: The second water inlet is also connected to a second water inlet pipe, which is used to connect the high-temperature condensate water of the steam heating system; the second water outlet is also connected to a second water outlet pipe, which is provided with a steam trap, and a steam return pipe is also provided between the steam trap and the high-temperature condensate water tank, and the steam trap is used to separate the fluid flowing out of the second water outlet into gas and liquid, the separated steam flows into the steam return pipe, and the separated water flows into the second water outlet pipe downstream of the steam trap.

10. The steam heating condensate waste heat recovery system according to claim 7, characterized in that: The steam heating condensate waste heat recovery device also includes: an auxiliary heating device, the first water outlet is also connected to a first water outlet pipe, the second water outlet is also connected to a second water outlet pipe, and the outlet ends of the first water outlet pipe and the second water outlet pipe are both connected to the auxiliary heating device.

11. The steam heating condensate waste heat recovery system according to claim 10, characterized in that: The steam heating condensate waste heat recovery device also includes a temperature control device, which is used to adjust the outlet water temperature.

12. The steam heating condensate waste heat recovery system according to claim 7, characterized in that: The first water inlet is also connected to a first water inlet pipe, the second water inlet is also connected to a second water inlet pipe, the first water inlet pipe is provided with a first flow regulating valve group, and the second water inlet pipe is provided with a second flow regulating valve group.

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