Dead steam heat energy recovery device

Abstract

The utility model relates to a dead steam heat energy recovery device which comprises a first heat energy recoverer, a second heat energy recoverer, a medium input pipe and a medium discharge pipe, the first heat energy recoverer comprises a first shell and a first heat exchange structure arranged in the first shell, and a dead steam inlet used for allowing dead steam to flow into the first shell is formed in the first shell; the second heat energy recoverer is located below the first heat energy recoverer, the second heat energy recoverer comprises a second shell and a second heat exchange structure arranged in the second shell, the first shell communicates with the second shell, and the second shell communicates with the second heat exchange structure. The second shell is provided with a waste steam outlet, and an inlet of the first heat exchange structure and an inlet of the second heat exchange structure are both connected with a medium input pipe. The medium input pipe can be selectively connected or disconnected with the first heat exchange structure and the second heat exchange structure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of exhaust steam heat energy recovery, and in particular, to an exhaust steam heat energy recovery device. Background Art

[0002] Exhaust steam refers to steam used in steam equipment. In industrial processes, exhaust steam is usually steam that has done work and is discharged from a steam engine or steam turbine.

[0003] In related technologies, in order to recover the heat energy in exhaust steam, a heat recovery device is usually installed at the exhaust steam discharge device. However, when the ambient temperature is low in winter, there is still a large temperature difference between the temperature of the exhaust steam after heat energy recovery and the atmospheric temperature, and white fog is likely to occur when the exhaust steam is discharged. Utility Model Content

[0004] The purpose of the present disclosure is to provide a waste steam heat energy recovery device to solve the technical problems existing in the related art.

[0005] In order to achieve the above objectives, the present disclosure provides an exhaust steam heat energy recovery device, comprising:

[0006] A first heat energy recovery device includes a first shell and a first heat exchange structure disposed in the first shell, wherein the first shell is provided with an exhaust steam inlet for allowing exhaust steam to flow into the first shell, so that the exhaust steam can exchange heat energy with the medium in the first heat exchange structure;

[0007] a second heat energy recovery device, located below the first heat energy recovery device, comprising a second shell and a second heat exchange structure disposed within the second shell, the first shell being in communication with the second shell so that the exhaust steam flowing from the exhaust steam inlet can enter the second shell and exchange heat energy with the medium within the second heat exchange structure, and the second shell being provided with an exhaust steam outlet;

[0008] a medium input pipe, to which the inlet of the first heat exchange structure and the inlet of the second heat exchange structure are both connected, and the medium input pipe can be selectively connected or blocked with the first heat exchange structure and selectively connected or blocked with the second heat exchange structure;

[0009] A medium discharge pipe, to which the outlet of the first heat exchange structure and the outlet of the second heat exchange structure are both connected.

[0010] Optionally, the first heat exchange structure includes a heat exchange plate, the second heat exchange structure includes a heat exchange tube, and the heat exchange plate is located above the exhaust steam inlet.

[0011] Optionally, the first housing is provided with a first medium inlet, a second medium inlet and a medium outlet, the medium input pipe includes a main pipe and a branch pipe connected to the main pipe, the main pipe is provided with a first switch valve, and the branch pipe is provided with a second switch valve;

[0012] The branch pipe is connected to the first medium inlet, the first medium inlet is connected to the inlet of the first heat exchange structure, the main pipe is connected to the second medium inlet, the second medium inlet is connected to the inlet of the second heat exchange structure, the outlet of the first heat exchange structure and the outlet of the second heat exchange structure are both connected to the medium outlet, and the medium discharge pipe is connected to the medium outlet.

[0013] Optionally, the second medium inlet is located above the first medium inlet, and the main pipe is located above the branch pipe.

[0014] Optionally, the exhaust steam heat energy recovery device further includes a deliquidator, one end of the deliquidator is connected to the exhaust steam outlet, and the other end of the deliquidator is connected to the outside atmosphere.

[0015] Optionally, the exhaust steam heat energy recovery device further includes a water collecting tank, which is arranged below the second heat energy recovery device and communicated with the second shell, and the bottom of the deliquidator is also communicated with the water collecting tank.

[0016] Optionally, the deliquidator includes a box body, a filter element, a first connecting pipe, a second connecting pipe and a third connecting pipe. A first interface is provided at the bottom of the box body, and a second interface is provided at the top of the box body. One end of the first connecting pipe is connected to the first interface, and the other end of the first connecting pipe is connected to the water collecting tank. One end of the second connecting pipe is connected to the first connecting pipe, and the other end of the second connecting pipe is connected to the exhaust steam outlet. One end of the third connecting pipe is connected to the second interface, and the other end of the third connecting pipe is connected to the outside atmosphere. The filter element is arranged in the box body, and the filter element has desiccant particles.

[0017] Optionally, the filter element includes a base body, a plurality of flow channels are formed in the base body, each of the flow channels is filled with the desiccant particles, one end of the plurality of flow channels is connected to the first interface, and the other end of the plurality of flow channels is connected to the second interface.

[0018] Optionally, the exhaust steam heat energy recovery device further includes a water collecting tank, a first drain pipe, a second drain pipe, a third on-off valve, and a fourth on-off valve. The water collecting tank is disposed below the second heat energy recovery device and is in communication with the second shell. The first end of the first drain pipe and the first end of the second drain pipe are both connected to the bottom of the water collecting tank. The second end of the first drain pipe is adapted to be connected to a drainage system. The second end of the second drain pipe is connected to the medium discharge pipe.

[0019] The third switch valve is arranged on the first drain pipe, the fourth switch valve is arranged on the second drain pipe, and the second drain pipe is further provided with a water pump.

[0020] Optionally, the exhaust steam heat recovery device also includes a liquid level sensor and a controller. The liquid level sensor is arranged in the water collecting tank and is used to detect the liquid level height in the water collecting tank. The liquid level sensor, the fourth switch valve and the water pump are all electrically connected to the controller.

[0021] With the above technical solution, since the medium input pipe can be selectively connected or disconnected with the first heat exchange structure and selectively connected or disconnected with the second heat exchange structure, the exhaust steam heat recovery device can be configured to have multiple different operating modes by controlling the connection relationship between the medium input pipe and the first and / or second heat exchange structures. For example, in summer or when the ambient temperature is high, one of the first and second heat exchange structures in the exhaust steam heat recovery device can be connected to the medium input pipe and exchange heat with the exhaust steam, while the other of the first and second heat exchange structures is closed. In winter or when the ambient temperature is low, both heat exchange structures (i.e., the first and second heat exchange structures) in the exhaust steam heat recovery device can be connected to the medium input pipe. In other words, both heat exchangers can exchange heat with the exhaust steam, thereby reducing the temperature difference between the exhaust steam after heat recovery and the atmosphere, thereby preventing the occurrence of white fog.

[0022] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0024] Figure 1 Schematic diagram of the structure of an exhaust steam heat energy recovery device provided by an exemplary embodiment of the present disclosure.

[0025] Figure 2It is a cross-sectional schematic diagram of a liquid remover of an exhaust steam heat energy recovery device provided by an exemplary embodiment of the present disclosure.

[0026] Description of Reference Numerals

[0027] 100-exhaust steam heat recovery device; 1-first heat recovery device; 11-first shell; 111-first medium inlet; 112-second medium inlet; 113-medium outlet; 12-exhaust steam inlet; 13-first heat exchange structure; 131-heat exchange plate; 2-second heat recovery device; 21-second shell; 22-exhaust steam outlet; 23-second heat exchange structure; 231-heat exchange pipe; 3-medium input pipe; 31-main pipe; 33-first on-off valve; 32-branch pipe; 34- Second on-off valve; 4-medium discharge pipe; 5-liquid remover; 51-housing; 52-filter element; 521-base; 522-flow channel; 523-desiccant particles; 53-first connecting pipe; 54-second connecting pipe; 55-third connecting pipe; 6-water collecting tank; 7-first drain pipe; 71-third on-off valve; 8-second drain pipe; 81-fourth on-off valve; 82-water pump; 9-liquid level sensor; 10-controller; 101-first connecting pipe; 102-second connecting pipe. DETAILED DESCRIPTION

[0028] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0029] In the present disclosure, it should be understood that the directional words used, such as "upper" and "lower", are defined based on the drawing directions of the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, they cannot be understood as limitations on the present disclosure. For example, the upper and lower directions may be the upper and lower directions of the exhaust steam heat recovery device. The terms "inside" and "outside" refer to the inside and outside of the corresponding structural contours. In addition, it should be noted that the terms used, such as "first" and "second", are used to distinguish one element from another, and do not have sequentiality or importance. In addition, in the description of the reference drawings, the same marks in different drawings represent the same elements.

[0030] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; and they may refer to direct connections or indirect connections via an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0031] like Figures 1 to 2 As shown, the present disclosure provides a waste steam heat energy recovery device 100, including a first heat energy recovery device 1, a second heat energy recovery device 2, a medium input pipe 3 and a medium discharge pipe 4. The first heat energy recovery device 1 includes a first shell 11 and a first heat exchange structure 13 arranged in the first shell 11. The first shell 11 is provided with a waste steam inlet 12 for allowing waste steam to flow into the first shell 11, so that the waste steam can exchange heat energy with the medium in the first heat exchange structure 13. The second heat energy recovery device 2 is located below the first heat energy recovery device 1. The second heat energy recovery device 2 includes a second shell 21 and a first heat exchange structure 13 arranged in the second shell 21. The second heat exchange structure 23 is connected to the first shell 11 and the second shell 21, so that the exhaust steam flowing in from the exhaust steam inlet 12 can enter the second shell 21 and exchange heat energy with the medium in the second heat exchange structure 23. The second shell 21 is provided with an exhaust steam outlet 22. The inlet of the first heat exchange structure 13 and the inlet of the second heat exchange structure 23 are both connected to the medium input pipe 3, and the medium input pipe 3 can be selectively connected or cut off with the first heat exchange structure 13 and selectively connected or cut off with the second heat exchange structure 23. The outlet of the first heat exchange structure 13 and the outlet of the second heat exchange structure 23 are both connected to the medium discharge pipe 4.

[0032] In the above-mentioned exhaust steam heat energy recovery device 100, the inlet of the first heat exchange structure 13 and the inlet of the second heat exchange structure 23 are both connected to the medium input pipe 3, and the outlet of the first heat exchange structure 13 and the outlet of the second heat exchange structure 23 are both connected to the medium discharge pipe 4. In other words, the medium can flow into the first heat exchange structure 13 and / or the second heat exchange structure 23 through the medium input pipe 3 and can flow out of the first heat exchange structure 13 and the second heat exchange structure 23 through the medium discharge pipe 4. In this way, the first heat exchange structure 13 and the second heat exchange structure 23 can both exchange heat with the exhaust steam through the medium, thereby realizing exhaust steam heat energy recovery.

[0033] In the above-mentioned exhaust steam heat recovery device 100, since the second heat recovery device 2 is located below the first heat recovery device 1, the first shell 11 of the first heat recovery device 1 is connected to the second shell 21 of the second heat recovery device 2, and the first shell 11 is provided with an exhaust steam inlet 12, and the second shell 21 is provided with an exhaust steam outlet 22. The exhaust steam can pass through the two heat recovery devices (i.e., the first heat recovery device 1 and the second heat recovery device 2) in sequence. Both heat recovery devices can exchange heat with the exhaust steam, which is beneficial to improving the heat energy recovery effect of the exhaust steam.

[0034] With the above technical solution, since the medium input pipe 3 can be selectively connected or disconnected with the first heat exchange structure 13 and the second heat exchange structure 23, the exhaust steam heat recovery device 100 can have multiple different operating modes by controlling the connection between the medium input pipe 3 and the first heat exchange structure 13 and / or the second heat exchange structure 23. For example, in summer or when the ambient temperature is high, one of the first heat exchange structure 13 and the second heat exchange structure 23 in the exhaust steam heat recovery device 100 can be connected to the medium input pipe 3 and exchange heat with the exhaust steam, while the other of the first heat exchange structure 13 and the second heat exchange structure 23 is closed. In winter or when the ambient temperature is low, both heat exchange structures (i.e., the first heat exchange structure 13 and the second heat exchange structure 23) in the exhaust steam heat recovery device 100 can be connected to the medium input pipe 3. In other words, both heat exchangers can exchange heat with the exhaust steam, thereby reducing the temperature difference between the exhaust steam after heat recovery and the atmosphere and preventing the occurrence of white fog.

[0035] Here, the above-mentioned white fog phenomenon refers to the phenomenon that when exhaust steam is discharged into the atmosphere, due to the large temperature difference between the exhaust steam and the atmospheric temperature, the exhaust steam condenses into small water droplets when encountering a cold environment, forming a visible fog-like substance.

[0036] It should be noted that the present disclosure does not limit the specific type of the above-mentioned medium. The above-mentioned medium can be water, heat transfer oil, gas, etc.

[0037] In an exemplary embodiment provided by the present disclosure, the exhaust steam heat recovery device 100 has a first operating mode and a second operating mode. In summer or when the atmospheric temperature is high, the exhaust steam heat recovery device 100 is in the first operating mode. At this time, the second heat exchange structure 23 in the exhaust steam heat recovery device 100 is connected to the medium input pipe 3 and exchanges heat with the exhaust steam, while the first heat exchange structure 13 is disconnected from the medium input pipe 3. The exhaust steam can flow through the exhaust steam inlet 12 on the first shell 11 of the first heat recovery device 1, and then flow into the second heat recovery device 2 through the first heat recovery device 1, and then be discharged after heat exchange with the second heat recovery device 2. When the exhaust steam flows through the first heat recovery device 1, since no medium passes through the first heat exchange structure 13, the exhaust steam does not exchange heat with the first heat exchange structure 13 in the first heat recovery device 1.

[0038] During winter or when the ambient temperature is low, the exhaust steam heat recovery device 100 operates in a second operating mode. The first heat exchange structure 13 of the first heat recovery device 1 and the second heat exchange structure 23 of the second heat recovery device 2 can both communicate with the medium inlet pipe 3 and exchange heat with the exhaust steam. Because the second heat recovery device 2 is located above the first heat recovery device 1, after the exhaust steam exchanges heat through the first and second heat recovery devices 1 and 2, the still-high-temperature exhaust steam, due to its lower density, can flow upward toward the first heat recovery device 1. Under the influence of the exhaust steam pressure, it can exchange heat again through the first heat exchange structure 13 of the first heat recovery device 1 and the second heat exchange structure 23 of the second heat recovery device 2. In other words, in the second operating mode, the exhaust steam can exchange heat with the first heat exchange structure 13 of the first heat recovery device 1 and the second heat exchange structure 23 of the second heat recovery device 2 multiple times, effectively collecting the heat energy in the exhaust steam. The temperature difference between the exhaust steam and the ambient air after heat exchange through the exhaust steam heat recovery device 100 is small, making the generation of white fog less likely.

[0039] The present disclosure does not limit the specific structures of the first heat exchange structure 13 and the second heat exchange structure 23. The first heat exchange structure 13 can be the same as or different from the second heat exchange structure 23. As one embodiment of the present disclosure, the first heat exchange structure 13 includes a heat exchange plate 131, and the second heat exchange structure 23 includes a heat exchange tube 231. The heat exchange plate 131 is located above the exhaust steam inlet 12.

[0040] Since the heat exchange plate 131 is located above the exhaust steam inlet 12 , when the exhaust steam flows into the first heat recovery device 1 through the exhaust steam inlet 12 , the heat exchange plate 131 will not block the exhaust steam, thereby avoiding affecting the exhaust steam from flowing into the second heat recovery device 2 .

[0041] It should be noted that the present disclosure does not limit the specific structure of the above-mentioned heat exchange tube 231. The heat exchange tube 231 can be a coil or a serpentine tube. As an embodiment of the present disclosure, the above-mentioned heat exchange tube 231 includes a plurality of heat exchange tubes arranged in the first shell 11, and the plurality of heat exchange tubes are arranged at intervals along the width direction of the second shell 21. The plurality of heat exchange tubes are interconnected, and the medium input pipe 3 and the medium discharge pipe 4 are respectively connected to two heat exchange tubes at both ends of the plurality of heat exchange tubes arranged at intervals along the above-mentioned width direction. In other words, the above-mentioned heat exchange tube 231 is bent into a maze-shaped tube, and the contact area between the heat exchange tube 231 and the exhaust steam is large, which is conducive to improving the recovery effect of the heat energy in the exhaust steam. In addition, the heat exchange tube 231 can be one or more, and the present disclosure does not limit this.

[0042] The present disclosure does not limit the specific structure of the heat exchange plate 131. As one embodiment of the present disclosure, the heat exchange plate 131 is formed in a wavy shape. The wavy heat exchange plate 131 has a larger contact area with the exhaust steam, which is beneficial for improving the recovery of heat energy from the exhaust steam. In addition, the heat exchange plate 131 can be one or more, and this disclosure does not limit this.

[0043] The present disclosure does not limit the specific connection relationship between the medium input pipe 3 and the medium discharge pipe 4 and the first heat exchange structure 13 and the second heat exchange structure 23, as long as the medium input pipe 3 can be selectively connected or disconnected with the first heat exchange structure 13 and can be selectively connected or disconnected with the second heat exchange structure 23. As an embodiment of the present disclosure, Figure 1 As shown, the first shell 11 is provided with a first medium inlet 111, a second medium inlet 112 and a medium outlet 113. The medium input pipe 3 includes a main pipe 31 and a branch pipe 32 connected to the main pipe 31. The main pipe 31 is provided with a first switch valve 33, and the branch pipe 32 is provided with a second switch valve 34. The branch pipe 32 is connected to the first medium inlet 111, the first medium inlet 111 is connected to the inlet of the first heat exchange structure 13, the main pipe 31 is connected to the second medium inlet 112, the second medium inlet 112 is connected to the inlet of the second heat exchange structure 23, the outlet of the first heat exchange structure 13 and the outlet of the second heat exchange structure 23 are both connected to the medium outlet 113, and the medium discharge pipe 4 is connected to the medium outlet 113. In this way, by controlling the opening and closing of the first switch valve 33, the conduction or cutoff between the medium input pipe 3 and the first heat exchange structure 13 can be controlled, and by controlling the opening and closing of the second switch valve 34, the conduction or cutoff between the medium input pipe 3 and the second heat exchange structure 23 can be controlled, and switching between different working modes of the exhaust steam heat energy recovery device 100 is more convenient.

[0044] Alternatively, as Figure 1 As shown, the second medium inlet 112 is located above the first medium inlet 111, and the main pipe 31 is located above the branch pipe 32. Since the second medium inlet 112 is located above the first medium inlet 111 and the main pipe 31 is located above the branch pipe 32, when the second switching valve 34 is opened, the medium in the main pipe 31 can flow into the branch pipe 32 under the action of gravity, eliminating the need for a pump, which helps reduce the cost increase caused by the use of a pump.

[0045] Optionally, the exhaust steam heat recovery device 100 may further include a first connecting pipe 101 and a second connecting pipe 102, with at least a portion of the first connecting pipe 101 and at least a portion of the second connecting pipe 102 located within the first shell 11. One end of the first connecting pipe 101 is connected to the second medium inlet 112, and the other end of the first connecting pipe 101 is connected to the inlet of the second heat exchange structure 23. One end of the second connecting pipe 102 is connected to the medium outlet 113, and the other end of the second connecting pipe 102 is connected to the medium discharge pipe 4. In other words, the second heat exchange structure 23 is connected to the medium input pipe 3 and the medium output pipe via the first connecting pipe 101 and the second connecting pipe 102, respectively. Furthermore, the first connecting pipe 101 and the second connecting pipe 102, disposed within the first shell 11, can also participate in the exhaust steam heat recovery process, thereby further improving the exhaust steam heat recovery effect.

[0046] In order to further avoid the occurrence of white fog, optionally, as Figure 1 As shown, the exhaust steam heat recovery device 100 also includes a liquid remover 5. One end of the liquid remover 5 is connected to the exhaust steam outlet 22, and the other end of the liquid remover 5 is connected to the outside atmosphere. Thus, after the exhaust steam heat energy is recovered, the exhaust steam passes through the liquid remover 5 before being discharged into the atmosphere. The liquid remover 5 can absorb water vapor in the exhaust steam, thereby further preventing the occurrence of white fog.

[0047] In order to collect the condensed water generated by the exhaust steam cooling during the exhaust steam heat recovery process, it is optional to Figure 1 As shown, the exhaust steam heat recovery device 100 may further include a water collecting tank 6, which is disposed below the second heat recovery device 2 and communicates with the second housing 21. The bottom of the liquid remover 5 is also communicated with the water collecting tank 6. The water collecting tank 6 can collect condensed water generated during the exhaust steam heat recovery process, and the condensed water is not directly discharged.

[0048] In addition, since the bottom of the liquid remover 5 is also connected to the water collecting tank 6, the liquid collected in the liquid remover 5 can also be collected by the water collecting tank 6. On the one hand, it can avoid the accumulation of liquid in the liquid remover 5, affecting the normal use of the liquid remover 5; on the other hand, it can also avoid the direct discharge of the liquid in the liquid remover 5.

[0049] The present disclosure does not limit the specific structure of the deliquidator 5. As an embodiment of the present disclosure, the deliquidator 5 includes a housing 51, a filter element 52, a first connecting pipe 53, a second connecting pipe 54 and a third connecting pipe 55. The bottom of the housing 51 is provided with a first interface, the top of the housing 51 is provided with a second interface, one end of the first connecting pipe 53 is connected to the first interface, the other end of the first connecting pipe 53 is connected to the water collecting tank 6, one end of the second connecting pipe 54 is connected to the first connecting pipe 53, the other end of the second connecting pipe 54 is connected to the exhaust steam outlet 22, one end of the third connecting pipe 55 is connected to the second interface, the other end of the third connecting pipe 55 is connected to the outside atmosphere, the filter element 52 is provided in the housing 51, and the filter element 52 has desiccant particles 523. In this way, the deliquidator 5 can realize the adsorption and discharge of water vapor in the exhaust steam after heat energy recovery, and can also realize the collection of liquid in the deliquidator 5.

[0050] In addition, since a filter element 52 is further provided in the box body 51 of the liquid remover 5, the filter element 52 can filter the exhausted exhaust steam, thereby further improving the environmental friendliness of the exhaust steam discharge.

[0051] In order to improve the adsorption of water vapor in the exhaust steam and the filtering effect of the exhaust steam by the above-mentioned deliquescence device 5, optionally, as Figure 2 As shown, the filter element 52 includes a base 521, within which are formed a plurality of flow channels 522. Each flow channel 522 is filled with desiccant particles 523. One end of each of the flow channels 522 is connected to the first interface, and the other end of each of the flow channels 522 is connected to the second interface. Thus, when exhaust steam flows into the deliquidator 5, it simultaneously flows into the plurality of flow channels 522 of the filter element 52. The desiccant particles 523 within the plurality of flow channels 522 can both adsorb and filter the water vapor in the exhaust steam. The deliquidator 5 has a good adsorption and filtration effect on the exhaust steam.

[0052] In order to collect and discharge the condensed water generated by the exhaust steam cooling during the exhaust steam heat recovery process, it is optional to Figure 1 As shown, the exhaust steam heat recovery device 100 further includes a water collection tank 6, a first drain pipe 7, a second drain pipe 8, a third on-off valve 71, and a fourth on-off valve 81. The water collection tank 6 is disposed below the second heat recovery device 2 and communicates with the second housing 21. The first end of the first drain pipe 7 and the first end of the second drain pipe 8 are both connected to the bottom of the water collection tank 6. The second end of the first drain pipe 7 is adapted to be connected to a drainage system, and the second end of the second drain pipe 8 is connected to the medium discharge pipe 4. The third on-off valve 71 is disposed on the first drain pipe 7, and the fourth on-off valve 81 is disposed on the second drain pipe 8. A water pump 82 is also disposed on the second drain pipe 8. The water collection tank 6 collects condensed water generated during the exhaust steam heat recovery process, preventing the condensed water from being directly discharged, effectively preventing direct discharge of the condensed water and contamination of the site.

[0053] In addition, since the lower end of the water collecting tank 6 is respectively connected to the first drain pipe 7 and the second drain pipe 8, and the first drain pipe 7 and the second drain pipe 8 are respectively connected to the drainage system and the medium discharge pipe 4, when there is a lot of liquid in the water collecting tank 6 and it needs to be discharged, the operator can open the third switch valve 71 to discharge the liquid in the water collecting tank 6 into the drainage system. When the drainage speed of the first drain pipe 7 is lower than the liquid collection speed of the water collecting tank 6, or when the first drain pipe 7 is blocked, the operator can also open the fourth switch valve 81 to discharge the liquid in the water collecting tank 6 through the medium discharge pipe 4 through the water pump 82, effectively avoiding the situation where there is too much liquid in the water collecting tank 6, which affects the normal use of the exhaust steam heat energy recovery device 100.

[0054] Alternatively, as Figure 1 As shown, the exhaust steam heat recovery device 100 may further include a liquid level sensor 9 and a controller 10. The liquid level sensor 9 is disposed within the water collecting tank 6 and is used to detect the liquid level within the water collecting tank 6. The liquid level sensor 9, the fourth on-off valve 81, and the water pump 82 are all electrically connected to the controller 10. Thus, when the liquid level sensor 9 detects that the liquid level within the water collecting tank 6 has reached a preset value, the controller 10 automatically opens the fourth on-off valve 81 and the water pump 82, allowing the liquid within the water collecting tank 6 to be discharged through the medium discharge pipe 4. This further prevents excessive liquid within the water collecting tank 6 from affecting the normal operation of the exhaust steam heat recovery device 100.

[0055] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0057] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A waste steam heat recovery device, characterized in that: include: A first heat energy recovery device includes a first shell and a first heat exchange structure disposed in the first shell, wherein the first shell is provided with an exhaust steam inlet for allowing exhaust steam to flow into the first shell, so that the exhaust steam can exchange heat energy with the medium in the first heat exchange structure; a second heat energy recovery device, located below the first heat energy recovery device, comprising a second shell and a second heat exchange structure disposed within the second shell, the first shell being in communication with the second shell so that the exhaust steam flowing from the exhaust steam inlet can enter the second shell and exchange heat energy with the medium within the second heat exchange structure, and the second shell being provided with an exhaust steam outlet; a medium input pipe, to which the inlet of the first heat exchange structure and the inlet of the second heat exchange structure are both connected, and the medium input pipe can be selectively connected or blocked with the first heat exchange structure and selectively connected or blocked with the second heat exchange structure; A medium discharge pipe, to which the outlet of the first heat exchange structure and the outlet of the second heat exchange structure are both connected.

2. The exhaust steam heat recovery device according to claim 1, characterized in that: The first heat exchange structure includes a heat exchange plate, and the second heat exchange structure includes a heat exchange tube. The heat exchange plate is located above the exhaust steam inlet.

3. The exhaust steam heat recovery device according to claim 1, characterized in that: The first housing is provided with a first medium inlet, a second medium inlet and a medium outlet, the medium input pipe includes a main pipe and a branch pipe connected to the main pipe, the main pipe is provided with a first switch valve, and the branch pipe is provided with a second switch valve; The branch pipe is connected to the first medium inlet, the first medium inlet is connected to the inlet of the first heat exchange structure, the main pipe is connected to the second medium inlet, the second medium inlet is connected to the inlet of the second heat exchange structure, the outlet of the first heat exchange structure and the outlet of the second heat exchange structure are both connected to the medium outlet, and the medium discharge pipe is connected to the medium outlet.

4. The exhaust steam heat recovery device according to claim 3, characterized in that: The second medium inlet is located above the first medium inlet, and the main pipe is located above the branch pipe.

5. The exhaust steam heat recovery device according to claim 1, characterized in that: The exhaust steam heat energy recovery device further includes a liquid remover, one end of which is connected to the exhaust steam outlet, and the other end of which is in communication with the outside atmosphere.

6. The exhaust steam heat recovery device according to claim 5, characterized in that: The exhaust steam heat energy recovery device further includes a water collecting tank, which is arranged below the second heat energy recovery device and communicated with the second shell. The bottom of the deliquidator is also communicated with the water collecting tank.

7. The exhaust steam heat recovery device according to claim 6, characterized in that: The liquid remover includes a box body, a filter element, a first connecting pipe, a second connecting pipe and a third connecting pipe. A first interface is provided at the bottom of the box body, and a second interface is provided at the top of the box body. One end of the first connecting pipe is connected to the first interface, and the other end of the first connecting pipe is connected to the water collecting tank. One end of the second connecting pipe is connected to the first connecting pipe, and the other end of the second connecting pipe is connected to the exhaust steam outlet. One end of the third connecting pipe is connected to the second interface, and the other end of the third connecting pipe is connected to the outside atmosphere. The filter element is arranged in the box body, and the filter element has desiccant particles.

8. The exhaust steam heat recovery device according to claim 7, characterized in that: The filter element includes a base body, a plurality of flow channels are formed in the base body, each of the flow channels is filled with the desiccant particles, one end of the plurality of flow channels is connected to the first interface, and the other end of the plurality of flow channels is connected to the second interface.

9. The exhaust steam heat recovery device according to claim 1, characterized in that: The exhaust steam heat energy recovery device further includes a water collecting tank, a first drain pipe, a second drain pipe, a third on-off valve, and a fourth on-off valve. The water collecting tank is disposed below the second heat energy recovery device and is in communication with the second shell. The first end of the first drain pipe and the first end of the second drain pipe are both connected to the bottom of the water collecting tank. The second end of the first drain pipe is adapted to be connected to a drainage system. The second end of the second drain pipe is connected to the medium discharge pipe. The third switch valve is arranged on the first drain pipe, the fourth switch valve is arranged on the second drain pipe, and the second drain pipe is further provided with a water pump.

10. The exhaust steam heat recovery device according to claim 9, characterized in that: The exhaust steam heat energy recovery device also includes a liquid level sensor and a controller. The liquid level sensor is arranged in the water collecting tank and is used to detect the liquid level height in the water collecting tank. The liquid level sensor, the fourth switch valve and the water pump are all electrically connected to the controller.

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