Combined shaft seal cooler for steam turbine of thermal power plant

Abstract

The invention discloses a combined shaft seal cooler for a steam turbine of a thermal power plant, and relates to the technical field of coolers. Comprising an installation unit which comprises a cooler body, an air inlet formed in the cooler body and an air outlet formed in the cooler body; and the flowing unit comprises a bottom plate, and the bottom plate is fixedly mounted at the bottom of the cooler body. According to the device, the S-shaped special-shaped pipes are distributed in the cooler body, the contact area of a steam-gas mixture and water is increased, and the steam-gas mixture can be quickly condensed into liquid water in cooperation with the cooling assembly. Condensed water flows to the bottom of the inner wall of the cooler body under the action of gravity, residual uncondensed steam-gas mixture is discharged through an exhaust port, efficient cooling and condensation processes are achieved, impurities, oil stains and peculiar smells are removed by starting a water pump and through a filter screen, an oil absorption plate and an activated carbon plate in a filter box, the purity of the condensed water is improved, and the service life of the cooler is prolonged. The recycling is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of coolers, and in particular to a combined shaft seal cooler for a steam turbine in a thermal power plant. Background Art

[0002] In industrial production, shaft seal coolers are widely used in various types of mechanical equipment to ensure the normal operation and long-term stability of the machinery. Specifically, shaft seal coolers are mainly used to extract the steam-gas mixture from the steam turbine seal system to prevent steam from leaking from the end seal into the steam engine room and oil system, thereby avoiding environmental pollution and damage to the oil quality. After entering the shaft seal cooler, the steam-gas mixture will be cooled into water, and the remaining uncondensed gas will be discharged into the atmosphere.

[0003] The shaft seal cooler is used to cool the shaft seal. The existing shaft seal cooler usually has a high cooling water temperature after long-term use, which reduces the cooling efficiency of the steam-gas mixture inside the cooler. At the same time, the cooled water is mixed with oil and cannot be separated. At the same time, the condensed water contains more impurities and cannot be filtered in time, resulting in the recovered condensed water being not conducive to reuse, reducing the use efficiency of the shaft seal cooler. Summary of the invention

[0004] In view of the above problems existing in the existing combined shaft seal cooler of the steam turbine in the thermal power plant, the present invention is proposed.

[0005] Therefore, the present invention provides a combined shaft seal cooler for a steam turbine in a thermal power plant, the purpose of which is to solve the problem that the cooled water is mixed with oil and cannot be separated, and the condensed water contains more impurities, and the recovered condensed water is not conducive to reuse.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: an installation unit, including a cooler body, an air inlet arranged on the cooler body, and an exhaust port arranged on the cooler body; and a flow unit, including a base plate, the base plate is fixedly installed on the bottom of the cooler body, a circulation component arranged on the base plate, a sealing component arranged on the circulation component, a drainage component arranged on the circulation component, and a cooling component arranged on the circulation component; an energy-saving unit, including a filter box, the filter box is arranged on the base plate, a recovery component arranged on the filter box, and a filter component arranged in the filter box.

[0007] As a preferred solution of the combined shaft seal cooler of the steam turbine in a thermal power plant described in the present invention, the circulation component includes a water tank arranged on the bottom plate, a water pump arranged at the bottom of the inner wall of the water tank, water pipes arranged on the upper side and the other side of the water tank, and a special-shaped tube arranged in the cooler body; one end of the water pipe located on the upper side is connected to the water pump, and both ends of the special-shaped tube are respectively connected to two groups of water pipes.

[0008] As a preferred solution of the combined shaft seal cooler of a steam turbine in a thermal power plant described in the present invention, the sealing assembly includes a cover plate arranged on a water tank, a buckle arranged on the right side of the water tank, and a sealing gasket arranged on the cover plate; the buckle is used in conjunction with the cover plate.

[0009] As a preferred solution of the combined shaft seal cooler of the steam turbine in a thermal power plant described in the present invention, the drainage assembly includes a pressure gauge arranged on the water tank, a drainage valve arranged on the front of the water tank, and a transparent plate arranged on the left side of the water tank.

[0010] As a preferred solution of the combined shaft seal cooler of the steam turbine in a thermal power plant described in the present invention, the cooling component includes a fixed frame arranged at the front of the water tank, a fan arranged in the fixed frame, a heat sink arranged on the back of the fan, and a semiconductor refrigeration plate arranged on the back of the heat sink.

[0011] As a preferred solution of the combined shaft seal cooler for steam turbines in thermal power plants of the present invention, the copper tube is arranged on the back of the semiconductor refrigeration plate, and the copper plate is arranged on the surface of the copper tube.

[0012] As a preferred solution of the combined shaft seal cooler of the steam turbine in a thermal power plant described in the present invention, it also includes a fixing component, which includes a fixing plate arranged on the copper tube, a cross bar arranged on the fixing plate, and a sliding sleeve arranged on the surface of the cross bar; the back side of the sliding sleeve is fixedly connected to the rear side of the inner wall of the water tank.

[0013] As a preferred solution of the combined shaft seal cooler of the steam turbine in a thermal power plant described in the present invention, the recovery component includes an air pump arranged on the bottom plate, an air pipe arranged on the output end of the air pump, a guide pipe arranged on the bottom of the cooler body, and a water pump arranged on the left side of the filter box; the bottom of the guide pipe is connected to the filter box, the top of the air pipe is connected to the top of the cooler body, and the output end of the water pump is connected to the water tank.

[0014] As a preferred solution of the combined shaft seal cooler of the steam turbine in a thermal power plant described in the present invention, the filter assembly includes an activated carbon plate arranged inside the filter box, an oil absorption plate arranged inside the filter box, and a filter mesh arranged inside the filter box.

[0015] As a preferred solution of the combined shaft seal cooler for steam turbines in thermal power plants described in the present invention, the clamping plates arranged on both sides of the activated carbon plate, the oil absorption plate and the filter screen are evenly distributed on both sides of the inner wall of the filter box.

[0016] The beneficial effects of the present invention are as follows: by using the S-shaped special-shaped tube distribution inside the cooler body, the contact area between the steam-gas mixture and the water is increased, and the steam-gas mixture can be quickly condensed into liquid water by cooperating with the cooling component. The condensed water flows to the bottom of the inner wall of the cooler body under the action of gravity, and the remaining uncondensed steam-gas mixture is discharged through the exhaust port, realizing an efficient cooling and condensation process. By starting the water pump and removing impurities, oil stains and odors through the filter screen, oil absorption plate and activated carbon plate in the filter box, the purity of the condensed water is improved, which is convenient for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The figure is a schematic diagram of the overall structure of the combined shaft seal cooler of the steam turbine in a thermal power plant according to the present invention.

[0019] Figure 2 The figure is a schematic diagram of the overall structure of the combined shaft seal cooler of the steam turbine in a thermal power plant according to the present invention.

[0020] Figure 3 The present invention is a schematic structural diagram of a flow assembly in a combined shaft seal cooler for a steam turbine in a thermal power plant.

[0021] Figure 4 The present invention is a schematic structural diagram of a drainage assembly in a combined shaft seal cooler for a steam turbine in a thermal power plant.

[0022] Figure 5 The present invention is a schematic structural diagram of a cooling component in a combined shaft seal cooler for a steam turbine in a thermal power plant.

[0023] Figure 6 The present invention is a schematic structural diagram of a cooling component in a combined shaft seal cooler for a steam turbine in a thermal power plant.

[0024] Figure 7 The present invention is a schematic structural diagram of a filter assembly in a combined shaft seal cooler for a steam turbine in a thermal power plant. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Example 1, reference Figure 1-Figure 3 , which is the first embodiment of the present invention, provides a combined shaft seal cooler for a steam turbine in a thermal power plant, including a cooler body 101. The cooler body 101 is the core part of the entire cooling system, responsible for accommodating the steam-gas mixture to be cooled, and two air ports are mirrored near one end on the outside, namely an air inlet 102 and an exhaust port 103. The air inlet 102 is used to introduce the steam-gas mixture to be cooled. Through reasonable position design, it is ensured that the steam-gas mixture can be evenly distributed inside the cooler body 101, and the exhaust port 103 is used to discharge the uncondensed steam-gas mixture. Through the design of the exhaust port 103, the pressure balance inside the system is ensured, and at the same time, overheating or blockage problems are prevented.

[0030] Among them, the water tank 202a is an important part of the water circulation and is fixedly installed on the base plate 201. Water pipes 202c are arranged on the upper end and the back side of the water tank 202a. The special-shaped pipe 202d is arranged on the inner wall of the cooler body 101. The other ends of the two groups of water pipes 202c pass through the cooler body 101 and are connected with the special-shaped pipe 202d. The water in the water tank 202a is driven by the water pump 202b to be transported to the S-shaped pipe through the water pipe 202c. After the cooling process is completed, the water flows back to the water tank 202a to form a cycle. The special-shaped pipe 202d is designed as an S-shaped pipe. The S-shaped pipe makes the flow path of the cooling water inside the cooler body 101 longer, and increases the contact area between the steam-gas mixture and the cooling water. By increasing the contact area, the steam-gas mixture can be more fully in contact with the cooling water, thereby accelerating the condensation process of the steam and gas, improving the cooling efficiency, and the cooling water can be more evenly distributed inside the cooler body 101, avoiding the problem of local overheating or insufficient cooling.

[0031] In addition, the cover 203a is movably connected to the top of the water tank 202a through an axle pin, and can effectively seal the water tank 202a together with the sealing gasket 203c to prevent water evaporation and the entry of external impurities, thereby ensuring the cleanliness of the water quality. The buckle 203b is used in conjunction with the cover 203a to provide a reliable fixing method, ensuring that the cover 203a will not be accidentally opened during use, thereby increasing the safety of the system.

[0032] Among them, the transparent plate 204c is installed on one side of the water tank 202a, which is convenient for monitoring the water level and internal conditions in the water tank 202a, providing an intuitive observation method, which is helpful to find problems and make adjustments in time. Through the coordinated work of these components, the entire cooling system can efficiently cool the steam-gas mixture to ensure the stability and reliability of the system operation. The drain valve 204b is used to clean the water tank 202a, ensuring that the water in the water tank 202a can be easily drained when necessary to maintain the system operation.

[0033] Example 2, reference Figure 4-Figure 6 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the back of the fixed frame 205a is fixedly connected to the front of the water tank 202a, a fan 205b is fixedly installed inside the fixed frame 205a, a heat sink 205c is fixedly connected to the back of the fan 205b, and a semiconductor refrigeration sheet 205d is fixedly connected to the back of the heat sink 205c.

[0034] Among them, the main function of the fan 205b is to quickly discharge the heat generated by the semiconductor refrigeration sheet 205d by forcing air to flow, thereby maintaining the cooling efficiency. The heat sink 205c can quickly absorb and conduct heat through its large surface area and high-efficiency materials, such as aluminum or copper. The heat sink 205c works in conjunction with the fan 205b to enhance the heat dissipation effect of the heat generated by the semiconductor refrigeration sheet 205d, ensuring the efficient operation of the refrigeration sheet. The semiconductor refrigeration sheet 205d converts electrical energy into thermal energy, cools one end and generates heat at the other end. After starting the semiconductor refrigeration sheet 205d, the semiconductor refrigeration sheet 205d quickly lowers the temperature and transfers the cold energy to the water in the water tank 202a through the copper tube 205e and the copper plate 205f, thereby achieving a cooling effect.

[0035] Furthermore, the copper tube 205e and the copper plate 205f have excellent thermal conductivity and can quickly transfer the low temperature generated by the semiconductor refrigeration plate 205d to the water inside the water tank 202a. The combined design of the copper tube 205e and the copper plate 205f improves the heat transfer efficiency by increasing the contact area, so that the water in the water tank 202a can be quickly cooled. The fixed plate 206a and the cross bar 206b are used to support the copper tube 205e and the copper plate 205f to ensure structural stability.

[0036] The remaining structures are the same as those of Example 1.

[0037] Example 3, reference Figure 1 and Figure 7 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: the air pump 302a is arranged on the upper part of the bottom plate 201 at the other side of the water tank 202a, and the air pump 302a is connected to the cooler body 101 through the air pipe 302b. The air pump 302a can increase the pressure in the cooler body 101 through the air pipe 302b, so that the condensed water after condensation can flow into the guide pipe 302c quickly under the combined action of pressure and gravity. The guide pipe 302c is connected to the cooler body 101, and the guide pipe 302c is the connection channel between the cooler body 101 and the filter box 301, which is responsible for guiding the condensed water from the cooler body 101 to the filter box 301.

[0038] Furthermore, the filter box 301 is a core component for filtering and purifying condensed water, and multiple filter layers are arranged inside, namely activated carbon plate 303a, oil absorption plate 303b and filter mesh 303c, which can effectively remove solid particles, impurities, oil stains, odors and organic pollutants in the condensed water. There are three groups of card plates 303d, which are evenly distributed on both sides of the inner wall of the filter box 301. It is a fixing device for the filter layer inside the filter box 301, and is used to fix the activated carbon plate 303a, oil absorption plate 303b and filter mesh 303c to ensure the stability of the position of the filter material inside the filter box 301 to prevent it from shifting or falling off during the filtration process.

[0039] The remaining structure is the same as that of Example 2.

[0040] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0041] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A combined shaft seal cooler for a steam turbine in a thermal power plant, characterized in that: include, The mounting unit (100) comprises a cooler body (101), an air inlet (102) arranged on the cooler body (101), and an air outlet (103) arranged on the cooler body (101); and the flow unit (200) comprises a bottom plate (201), the bottom plate (201) being fixedly mounted on the bottom of the cooler body (101), a circulation component (202) arranged on the bottom plate (201), a sealing component (203) arranged on the circulation component (202), a drainage component (204) arranged on the circulation component (202), and a cooling component (205) arranged on the circulation component (202); The energy-saving unit (300) comprises a filter box (301), the filter box (301) being arranged on the bottom plate (201), a recovery component (302) arranged on the filter box (301), and a filter component (303) arranged in the filter box (301).

2. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 1, characterized in that: The circulation component (202) comprises a water tank (202a) arranged on the bottom plate (201), a water pump (202b) arranged at the bottom of the inner wall of the water tank (202a), water pipes (202c) arranged on the upper side and the other side of the water tank (202a), and a special-shaped pipe (202d) arranged in the cooler body (101); One end of the water pipe (202c) located on the upper side is connected to the water pump (202b), and both ends of the special-shaped pipe (202d) are respectively connected to the two groups of water pipes (202c).

3. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 2, characterized in that: The sealing assembly (203) comprises a cover plate (203a) arranged on the water tank (202a), a buckle (203b) arranged on the right side of the water tank (202a), and a sealing gasket (203c) arranged on the cover plate (203a); The buckle (203b) is used in conjunction with the cover plate (203a).

4. The combined shaft seal cooler for steam turbines in thermal power plants according to any one of claim 3, characterized in that: The drainage component (204) comprises a pressure gauge (204a) arranged on the water tank (202a), a drainage valve (204b) arranged on the front of the water tank (202a), and a transparent plate (204c) arranged on the left side of the water tank (202a).

5. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 4, characterized in that: The cooling component (205) comprises a fixing frame (205a) arranged at the front of the water tank (202a), a fan (205b) arranged in the fixing frame (205a), a heat sink (205c) arranged at the back of the fan (205b), and a semiconductor cooling sheet (205d) arranged at the back of the heat sink (205c).

6. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 5, characterized in that: A copper tube (205e) is arranged on the back side of the semiconductor cooling plate (205d), and a copper plate (205f) is arranged on the surface of the copper tube (205e).

7. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 6, characterized in that: It also includes a fixing assembly (206), the fixing assembly (206) including a fixing plate (206a) disposed on the copper tube (205e), a cross bar (206b) disposed on the fixing plate (206a), and a sliding sleeve (206c) disposed on the surface of the cross bar (206b); The back side of the sliding sleeve (206c) is fixedly connected to the rear side of the inner wall of the water tank (202a).

8. The combined shaft seal cooler for steam turbines in thermal power plants according to any one of claims 5 to 7, characterized in that: The recovery component (302) comprises an air pump (302a) arranged on the bottom plate (201), an air pipe (302b) arranged on the output end of the air pump (302a), a flow guide pipe (302c) arranged on the bottom of the cooler body (101), and a water pump (302d) arranged on the left side of the filter box (301) and connected to the filter box; The bottom of the flow guide pipe (302c) is connected to the filter box (301), the top of the air pipe (302b) is connected to the top of the cooler body (101), and the output end of the water pump (302d) is connected to the water tank (202a).

9. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 8, characterized in that: The filter assembly (303) comprises an activated carbon plate (303a) disposed inside the filter box (301), an oil absorption plate (303b) disposed inside the filter box (301), and a filter net (303c) disposed inside the filter box (301).

10. The combined shaft seal cooler for steam turbines in thermal power plants according to claim 9, characterized in that: The card plates (303d) are arranged on both sides of the activated carbon plate (303a), the oil absorption plate (303b) and the filter screen (303c), and the card plates (303d) are evenly distributed on both sides of the inner wall of the filter box (301).

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