Dead steam recovery device and steam turbine device

Abstract

The utility model provides a dead steam recovery device and a steam turbine device, the dead steam recovery device comprises a heat exchanger, the heat exchanger is provided with a dead steam channel and a cycle working medium channel which are not communicated with each other, and the heat exchanger is also provided with a dead steam heat exchange inlet and a dead steam heat exchange outlet which are communicated with the dead steam channel; the heat exchanger is further provided with a cycle working medium inlet and a cycle working medium outlet which are communicated with the cycle working medium channel; the circulating working medium assembly comprises an expansion machine, a power generator and an air cooler, the circulating working medium outlet is communicated with an inlet of the expansion machine, an outlet of the expansion machine is communicated with an inlet of the air cooler, an outlet of the air cooler is communicated with the circulating working medium inlet, the expansion machine is in driving connection with the power generator, and the power generator is electrically connected with the air cooler; the steam exhaust heat exchange outlet is communicated with an inlet of the condensate tank, and a vacuumizing piece is arranged on the condensate tank. By means of the technical scheme, the problem that in the related technology, energy consumption of a steam turbine is large in the dead steam recycling process can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, and in particular to an exhaust steam recovery device and a steam turbine device. Background Art

[0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work. It is one of the main equipment of a steam power plant. A steam turbine is a turbine machine, also known as a steam turbine. After superheated steam with thermal potential energy is introduced into the steam turbine through a pipeline, the thermal potential energy is converted into kinetic energy. The high-speed flowing steam drives the turbine rotor to rotate, generating mechanical energy. The steam that releases the thermal potential energy is discharged from the exhaust port at the bottom of the steam turbine, which is called exhaust steam.

[0003] In the related technology, the steam turbine expands high-pressure steam to do work, and exhaust steam is generated after the high-pressure steam does work. The exhaust steam is condensed and recovered by a water condenser or an air cooler. The water condenser uses circulating water to exchange heat with the exhaust steam to condense the exhaust steam, and the air cooler uses fins and air-cooled fans to exchange heat and condense the exhaust steam, which consumes huge energy.

[0004] However, no matter whether a water condenser or an air cooler is used to condense and recover the exhaust steam, there is huge energy consumption in the recovery process. Utility Model Content

[0005] The utility model provides an exhaust steam recovery device and a steam turbine device to solve the problem of high energy consumption in the process of exhaust steam recovery of the steam turbine in the related technology.

[0006] According to one aspect of the utility model, a waste steam recovery device is provided, which includes: a heat exchanger having a waste steam channel and a circulating working fluid channel which are not connected to each other, the heat exchanger also having a waste steam heat exchange inlet and a waste steam heat exchange outlet which are connected to the waste steam channel, and the heat exchanger also having a circulating working fluid inlet and a circulating working fluid outlet which are connected to the circulating working fluid channel; a circulating working fluid assembly, including an expander, a generator and an air cooler, the circulating working fluid outlet is connected to the inlet of the expander, the outlet of the expander is connected to the inlet of the air cooler, the outlet of the air cooler is connected to the circulating working fluid inlet, the expander is drivingly connected to the generator, and the generator is electrically connected to the air cooler; a condensate tank, the waste steam heat exchange outlet is connected to the inlet of the condensate tank, and a vacuum pump is provided on the condensate tank.

[0007] Furthermore, the exhaust steam recovery device also includes a liquid level detection component arranged on the condensate tank.

[0008] Furthermore, the exhaust steam recovery device also includes a condensate pump arranged at the outlet of the condensate tank.

[0009] Furthermore, the exhaust steam recovery device also includes a control component, which is respectively connected to the liquid level detection component and the condensate pump signal to control the operation of the condensate pump according to the detection result of the liquid level detection component.

[0010] Furthermore, the air cooler includes a shell, a fan and a liquid collecting part. The shell has an air cooling cavity. The outlet of the expander is connected to the air cooling cavity. The generator is electrically connected to the fan. The liquid collecting part is arranged on the inner wall of the shell. The outlet of the liquid collecting part is connected to the inlet of the circulating working fluid.

[0011] Furthermore, the inner top wall of the air-cooling cavity is a centrosymmetrical conical surface, the middle part of the conical surface protrudes upward, and the inner side wall of the air-cooling cavity is vertically arranged.

[0012] Furthermore, the liquid collecting member comprises a liquid collecting plate, which extends in the transverse direction and is arranged on the inner wall of the air-cooling cavity. The upper surface of the liquid collecting plate is an arc-shaped surface, and the middle part of the arc-shaped surface is concave downward.

[0013] Furthermore, a plurality of condensing fins extending vertically and arranged at intervals in the transverse direction are arranged on the inner top wall of the air-cooling cavity.

[0014] Furthermore, the circulating working medium component also includes a circulating working medium pump arranged between the outlet of the air cooler and the circulating working medium inlet.

[0015] According to another aspect of the utility model, a steam turbine device is provided, comprising: a steam turbine having an exhaust steam outlet; an exhaust steam recovery device, the exhaust steam outlet of the steam turbine is connected to the exhaust steam heat exchange inlet of the steam turbine device, and the exhaust steam recovery device is the exhaust steam recovery device provided above.

[0016] By applying the technical solution of the utility model, the exhaust steam recovery device includes a heat exchanger, a circulating working fluid component and a condensate tank. The heat exchanger is used to exchange heat between the exhaust steam channel and the circulating working fluid channel. The exhaust steam generated by the steam turbine is introduced into the exhaust steam heat exchange inlet. In the heat exchanger, the exhaust steam heats the circulating working fluid. The heated circulating working fluid is introduced into the expander through the circulating working fluid outlet to expand and do work, thereby driving the generator to generate electricity to supply electricity for the operation of the air cooler. The air cooler is operated to condense the circulating working fluid. The condensed circulating working fluid is sent to the heat exchanger through the circulating working fluid inlet to cool the exhaust steam in the exhaust steam channel. The cooled exhaust steam enters the condensate tank through the exhaust steam heat exchange outlet for condensation recovery. A vacuum pump is provided on the condensate tank to meet the vacuum requirement of the exhaust steam discharged from the steam turbine. Therefore, the heat energy of the exhaust steam is recovered by the circulating working fluid in the heat exchanger, and the recovered heat energy is converted into electrical energy in the circulating working fluid component to supply energy for the heat exchange cycle of the circulating working fluid, thereby recovering and reusing the exhaust steam heat energy of the steam turbine, and the electrical energy converted from the recovered exhaust steam heat energy is used to supply the energy demand in the exhaust steam heat energy recovery process, thereby reducing the energy consumption of the steam turbine in the process of recovering the exhaust steam, and achieving the purpose of energy saving and consumption reduction of the steam turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 The schematic diagram of the structure of the exhaust steam recovery device provided in the embodiment of the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Heat exchanger; 11. Exhaust steam heat exchange inlet; 12. Exhaust steam heat exchange outlet; 13. Circulating working fluid inlet; 14. Circulating working fluid outlet;

[0021] 20. Circulating medium assembly; 21. Expander; 22. Generator; 23. Air cooler; 231. Shell; 232. Fan; 233. Liquid collecting part; 24. Circulating medium pump;

[0022] 30. Condensate tank; 31. Vacuum pumping parts;

[0023] 40. Liquid level detection parts;

[0024] 50. Condensate pump; 60. Steam turbine; 70. High-pressure steam pipeline; 80. Condensate pipeline network. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] like Figure 1As shown, an embodiment of the utility model provides a waste steam recovery device, which includes a heat exchanger 10, a circulating working fluid component 20 and a condensate tank 30. The heat exchanger 10 has a waste steam channel and a circulating working fluid channel that are not connected to each other. The heat exchanger 10 also has a waste steam heat exchange inlet 11 and a waste steam heat exchange outlet 12 connected to the waste steam channel. The heat exchanger 10 also has a circulating working fluid inlet 13 and a circulating working fluid outlet 14 connected to the circulating working fluid channel. The circulating working fluid component 20 includes an expander 21, a generator 22 and an air cooler 23. The circulating working fluid outlet 14 is connected to the inlet of the expander 21, the outlet of the expander 21 is connected to the inlet of the air cooler 23, and the outlet of the air cooler 23 is connected to the circulating working fluid inlet 13. The expander 21 is drivingly connected to the generator 22, the generator 22 is electrically connected to the air cooler 23, the waste steam heat exchange outlet 12 is connected to the inlet of the condensate tank 30, and the condensate tank 30 is provided with a vacuum pump 31.

[0027] The exhaust steam recovery device provided in this embodiment is applied, and the exhaust steam recovery device includes a heat exchanger 10, a circulating working medium component 20 and a condensate tank 30. The heat exchanger 10 is used to perform heat exchange between the exhaust steam channel and the circulating working medium channel, and the exhaust steam generated by the steam turbine 60 is introduced into the exhaust steam heat exchange inlet 11. In the heat exchanger 10, the exhaust steam heats the circulating working medium, and the heated circulating working medium is introduced into the expander 21 through the circulating working medium outlet 14 to expand and do work, thereby driving the generator 22 to generate electricity to supply electricity for the operation of the air cooler 23, and the air cooler 23 is operated to condense the circulating working medium. The condensed circulating working medium is sent to the heat exchanger 10 through the circulating working medium inlet 13 to cool the exhaust steam in the exhaust steam channel, and the cooled exhaust steam enters the condensate tank 30 through the exhaust steam heat exchange outlet 12 for condensation recovery, wherein a vacuum pumping member 31 is provided on the condensate tank 30 to meet the vacuum requirement of exhaust steam discharge from the steam turbine. Therefore, the heat energy of the exhaust steam is recovered by the circulating working fluid in the heat exchanger 10, and the recovered heat energy is converted into electrical energy in the circulating working fluid component 20 to supply energy for the heat exchange cycle of the circulating working fluid, thereby recovering and reusing the exhaust steam heat energy of the steam turbine, and the electrical energy converted from the recovered exhaust steam heat energy is used to supply the energy demand in the exhaust steam heat energy recovery process, thereby reducing the energy consumption of the steam turbine in the process of recovering the exhaust steam, and achieving the purpose of energy saving and consumption reduction of the steam turbine.

[0028] The circulating working fluid is not limited to organic matter, inorganic matter, chemical compound and the like.

[0029] In the related art, water cooling is mostly used to cool exhaust steam in the south according to the geographical characteristics of my country, while air cooling is mostly used to cool exhaust steam in the north due to water shortage. However, whether water cooling or air cooling is used, huge energy consumption is required to cool the exhaust steam and condense it into water. In the present application, the electric energy converted from the recovered exhaust steam heat energy is used to supply the energy demand in the exhaust steam heat energy recovery process (such as the electric energy required by the air cooler 23), thereby reducing power consumption.

[0030] like Figure 1 As shown, the exhaust steam recovery device further includes a liquid level detection member 40 disposed on the condensate tank 30. The liquid level detection member 40 is used to detect the liquid level height in the condensate tank 30, so that the staff can observe the condensate storage amount in the condensate tank 30.

[0031] like Figure 1 As shown, the exhaust steam recovery device further includes a condensate pump 50 disposed at the outlet of the condensate tank 30. The condensate pump 50 is used to control the opening and closing state of the outlet of the condensate tank 30, so as to facilitate the operation of the staff to control whether the condensate in the condensate tank 30 is discharged.

[0032] like Figure 1 As shown, the exhaust steam recovery device further includes a control component, which is respectively connected to the liquid level detection component 40 and the condensate pump 50 by signals, so as to control the operation of the condensate pump 50 according to the detection result of the liquid level detection component 40. By setting the control component, the control component controls the operation of the condensate pump 50 according to the detection result of the liquid level detection component 40, so as to improve the automation degree of the operation of the condensate pump 50. When the liquid level in the condensate tank 30 rises to a set threshold value or is greater than the set threshold value, the control component controls the condensate pump 50 to open, so as to pump out the condensate in the condensate tank 30, specifically, to pump the condensate in the condensate tank 30 to the condensate pipe network 80.

[0033] like Figure 1 As shown, the air cooler 23 includes a shell 231, a fan 232 and a liquid collecting member 233. The shell 231 has an air cooling cavity. The outlet of the expander 21 is connected to the air cooling cavity. The generator 22 is electrically connected to the fan 232. The liquid collecting member 233 is arranged on the inner wall of the shell 231. The outlet of the liquid collecting member 233 is connected to the circulating medium inlet 13. The circulating medium after expansion work is introduced into the shell 231. The electric energy converted by the expansion work of the circulating medium is supplied to the fan 232. After the fan 232 is powered on, it cools the circulating medium in the shell 231. The circulating medium condensed in the shell 231 is collected by the liquid collecting member 233, and the collected circulating medium is sent to the heat exchanger 10 through the circulating medium inlet 13.

[0034] In this embodiment, the inner top wall of the air-cooling cavity is a centrosymmetrical conical surface, the middle of the conical surface protrudes upward, and the inner side wall of the air-cooling cavity is arranged vertically. The air-cooling cavity with the above structure facilitates the droplets formed by the condensation of the circulating working fluid vapor on the conical surface to flow along the conical surface to the inner side wall of the air-cooling cavity, and continue to flow downward along the inner side wall of the air-cooling cavity until being collected by the liquid collecting member 233.

[0035] In this embodiment, the liquid collecting member 233 includes a liquid collecting plate, which extends in the transverse direction and is arranged on the inner wall of the air-cooling cavity. The upper surface of the liquid collecting plate is an arc-shaped surface, and the middle part of the arc-shaped surface is concave downward. The liquid collecting member 233 with the above structure is convenient for collecting the condensed liquid droplets of the circulating working fluid flowing downward on the inner wall of the air-cooling cavity.

[0036] In this embodiment, a plurality of condensing fins extending vertically and arranged at intervals in the horizontal direction are provided on the inner top wall of the air cooling cavity. By providing a plurality of condensing fins, it is convenient for the circulating working medium steam in the air cooling cavity to exchange heat with the condensing fins, so as to improve the condensation effect of the circulating working medium in the air cooler 23.

[0037] like Figure 1 As shown, the circulating medium assembly 20 further includes a circulating medium pump 24 disposed between the outlet of the air cooler 23 and the circulating medium inlet 13. The circulating medium pump 24 is used to provide power for the flow of the circulating medium.

[0038] The use of the exhaust steam recovery device provided in this embodiment has the following advantages: realizing circulation technology, converting heat energy into electrical energy for reuse, saving energy and reducing consumption, and realizing reduction of production costs.

[0039] (1) Since existing air separation units are all equipped with water condensers or air coolers, the air cooler 23 in the exhaust steam recovery unit can utilize existing equipment and facilities, thus avoiding additional investment, and having the convenience of equipment and facilities reuse, thus saving capital investment to a certain extent;

[0040] (2) The heat exchanger 10 is used to condense the exhaust steam. The exhaust steam undergoes phase change and condensation in the heat exchanger 10 to become condensed water, which is then pumped into the condensate pipe network 80 through the condensate pump 50 for recovery, thereby reducing steam consumption;

[0041] (3) The circulating working fluid is used to exchange heat with the exhaust steam through the heat exchanger 10 to achieve the purpose of exhaust steam condensation, and the circulating working fluid enters the expander 21 after absorbing heat through the heat exchanger 10 to expand and do work to drive the generator 22 to generate electricity. The expanded circulating working fluid is condensed through the air cooler 23, and then pressurized by the circulating working fluid pump 24 and pumped into the heat exchanger 10 to exchange heat and cool the exhaust steam. The circulating working fluid performs work through steam and condensation, forming a closed cycle. Among them, the power generated by the generator 22 is used for the fan 232 of the air cooler 23, achieving the purpose of recycling the exhaust steam heat energy for power generation and achieving the purpose of energy saving and consumption reduction;

[0042] (4) A vacuum pump 31 is provided to reduce the exhaust pressure of the steam turbine and the steam consumption. The heat exchanger 10 condenses the exhaust steam, so that the exhaust pressure of the steam turbine is further reduced.

[0043] Another embodiment of the utility model provides a steam turbine device, which includes a steam turbine 60 and an exhaust steam recovery device. The steam turbine 60 has an exhaust steam outlet, and the exhaust steam outlet of the steam turbine 60 is connected to the exhaust steam heat exchange inlet 11 of the steam turbine device. The exhaust steam recovery device is the exhaust steam recovery device provided above.

[0044] By using the steam turbine device provided in this embodiment, the exhaust steam generated by the steam turbine 60 is introduced into the exhaust steam heat exchange inlet 11 through the exhaust steam outlet, and the heat exchanger 10 is used to perform heat exchange between the exhaust steam channel and the circulating working medium channel. Specifically, in the heat exchanger 10, the exhaust steam heats the circulating working medium, and the heated circulating working medium is introduced into the expander 21 through the circulating working medium outlet 14 to expand and do work, thereby driving the generator 22 to generate electricity to supply electricity for the operation of the air cooler 23, and the air cooler 23 is operated to condense the circulating working medium. The condensed circulating working medium is sent to the heat exchanger 10 through the circulating working medium inlet 13 to cool the exhaust steam in the exhaust steam channel, and the cooled exhaust steam enters the condensate tank 30 through the exhaust steam heat exchange outlet 12 for condensation recovery, wherein a vacuum pumping member 31 is provided on the condensate tank 30 to meet the vacuum requirement of exhaust steam discharge from the steam turbine. Therefore, the heat energy of the exhaust steam is recovered by the circulating working fluid in the heat exchanger 10, and the recovered heat energy is converted into electrical energy in the circulating working fluid component 20 to supply energy for the heat exchange cycle of the circulating working fluid, thereby recovering and reusing the exhaust steam heat energy of the steam turbine, and the electrical energy converted from the recovered exhaust steam heat energy is used to supply the energy demand in the exhaust steam heat energy recovery process, thereby reducing the energy consumption of the steam turbine in the process of recovering the exhaust steam, and achieving the purpose of energy saving and consumption reduction of the steam turbine.

[0045] Specifically, the high pressure steam line 70 provides a high pressure steam feed to the steam turbine 60 .

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0048] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0050] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An exhaust steam recovery device, characterized in that: The exhaust steam recovery device comprises: A heat exchanger (10) having an exhaust steam channel and a circulating working medium channel which are not connected to each other, the heat exchanger (10) also having an exhaust steam heat exchange inlet (11) and an exhaust steam heat exchange outlet (12) which are connected to the exhaust steam channel, and the heat exchanger (10) also having a circulating working medium inlet (13) and a circulating working medium outlet (14) which are connected to the circulating working medium channel; A circulating working medium assembly (20), comprising an expander (21), a generator (22) and an air cooler (23), wherein the circulating working medium outlet (14) is connected to the inlet of the expander (21), the outlet of the expander (21) is connected to the inlet of the air cooler (23), the outlet of the air cooler (23) is connected to the circulating working medium inlet (13), the expander (21) is drivingly connected to the generator (22), and the generator (22) is electrically connected to the air cooler (23); A condensate tank (30), wherein the exhaust steam heat exchange outlet (12) is connected to an inlet of the condensate tank (30), and a vacuum pump (31) is provided on the condensate tank (30).

2. The exhaust steam recovery device according to claim 1, characterized in that: The exhaust steam recovery device further comprises a liquid level detection component (40) arranged on the condensate tank (30).

3. The exhaust steam recovery device according to claim 2, characterized in that: The exhaust steam recovery device further comprises a condensate pump (50) arranged at the outlet of the condensate tank (30).

4. The exhaust steam recovery device according to claim 3, characterized in that: The exhaust steam recovery device also includes a control component, which is respectively connected to the liquid level detection component (40) and the condensate pump (50) by signals so as to control the operation of the condensate pump (50) according to the detection result of the liquid level detection component (40).

5. The exhaust steam recovery device according to claim 1, characterized in that: The air cooler (23) comprises a shell (231), a fan (232) and a liquid collecting member (233); the shell (231) has an air cooling cavity; the outlet of the expander (21) is connected to the air cooling cavity; the generator (22) is electrically connected to the fan (232); the liquid collecting member (233) is arranged on the inner side wall of the shell (231); and the outlet of the liquid collecting member (233) is connected to the circulating medium inlet (13).

6. The exhaust steam recovery device according to claim 5, characterized in that: The inner top wall of the air-cooling cavity is a centrosymmetrical conical surface, the middle part of the conical surface protrudes upward, and the inner side wall of the air-cooling cavity is vertically arranged.

7. The exhaust steam recovery device according to claim 6, characterized in that: The liquid collecting member (233) comprises a liquid collecting plate, which extends in the transverse direction and is arranged on the inner side wall of the air-cooling cavity. The upper surface of the liquid collecting plate is an arc-shaped surface, and the middle part of the arc-shaped surface is concave downward.

8. The exhaust steam recovery device according to claim 5, characterized in that: A plurality of condensing fins extending vertically and arranged at intervals in the transverse direction are arranged on the inner top wall of the air-cooling cavity.

9. The exhaust steam recovery device according to claim 1, characterized in that: The circulating working medium component (20) further comprises a circulating working medium pump (24) arranged between the outlet of the air cooler (23) and the circulating working medium inlet (13).

10. A steam turbine device, characterized in that: The steam turbine device comprises: A steam turbine having an exhaust steam outlet; An exhaust steam recovery device, wherein the exhaust steam outlet of the steam turbine is connected to the exhaust steam heat exchange inlet (11) of the steam turbine device, and the exhaust steam recovery device is the exhaust steam recovery device according to any one of claims 1 to 9.

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