Condenser for cooling steam turbine

Abstract

The invention discloses a condenser for cooling a steam turbine, and relates to the technical field of condensers. The condenser for cooling the steam turbine comprises a condensing box, a water inlet box, a water drainage box and a filtering unit, the condensing box is provided with a condensing cavity, a steam inlet and a water collecting box, and a plurality of condensing pipes with the two ends extending out of the condensing box are arranged in the condensing cavity; the water inlet tank and the water outlet tank are arranged on the two sides of the condensation tank corresponding to the two ends of the condensation pipe respectively and communicated with the condensation pipe, the water inlet tank is provided with a water inlet and a water outlet, and the filtering unit is arranged at the position of the water inlet and used for filtering water entering the condensation pipe. According to the condenser for cooling the steam turbine, water before entering the condensation pipe can be filtered, the situation that impurities in the water accelerate crystallization and separation of salts in the condensation pipe and consequently the condensation pipe is blocked is avoided, the through-flow section of the condensation pipe and the heat exchange efficiency of the condenser are guaranteed, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of condensers, and in particular to a condenser for cooling a steam turbine. Background Art

[0002] A condenser is a heat exchanger that condenses steam from a steam turbine into water. It is also called a rehydrator. It is divided into two types: a water condenser and an air condenser. In addition to condensing the exhaust steam from a steam turbine into water for reuse in the boiler, the condenser can also create and maintain a vacuum at the exhaust of the steam turbine.

[0003] In the related art, when the condenser uses water as a cooling medium, impurities contained in the water (such as fine particles of sand, dust, mud of insoluble salts, colloidal hydroxides, impurity debris, corrosion products, oil stains, corpses of bacteria and algae and sticky secretions, etc.) are not removed in time, which will act as crystal nuclei inside the condenser to accelerate the crystallization and precipitation process of salts dissolved in the water (such as bicarbonates, sulfates, chlorides, silicates, etc.). After long-term use, scale will form and block the condenser, reducing the heat exchange efficiency of the condenser, increasing the amount of cooling water used, and increasing production costs. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a condenser for cooling a turbine, which can filter the water before entering the condenser to prevent impurities in the water from accelerating the crystallization of salts in the condenser and causing blockage of the condenser, thereby ensuring the flow cross-section of the condenser and the heat exchange efficiency of the condenser and reducing production costs.

[0006] The condenser for cooling a steam turbine according to an embodiment of the present invention comprises:

[0007] A condenser box, the condenser box having a condenser chamber and being provided with a steam inlet and a water collecting tank, wherein a plurality of condenser tubes are arranged in the condenser chamber at intervals, and both ends of the condenser tubes extend out of the condenser box respectively;

[0008] A water inlet box and a water drain box, the water inlet box and the water drain box are respectively arranged on both sides of the condensation box corresponding to the two ends of the condensation pipe, the water inlet box has a water inlet and is connected to the condensation pipe, and the water drain box has a water drain and is connected to the condensation pipe;

[0009] A filter unit, the filter unit includes a mounting cylinder, a filter cylinder, a connecting ring, a spiral auger, a water pipe and a cylinder cover, the mounting cylinder is arranged at the water inlet, the filter cylinder is arranged in the mounting cylinder, the connecting ring is arranged between the mounting cylinder and the filter cylinder to connect the mounting cylinder and the filter cylinder, the spiral auger is rotatably arranged in the filter cylinder and is used to transport impurities to the connecting ring, the water pipe passes through the mounting cylinder and is connected to the filter cylinder, the water pipe is used to transport cooling water to the filter cylinder, and the cylinder cover is detachably arranged on the mounting cylinder.

[0010] The condenser for turbine cooling in the embodiment of the present invention can filter the water before entering the condenser, preventing impurities in the water from accelerating the crystallization of salts in the condenser to cause blockage of the condenser, thereby ensuring the flow cross-section of the condenser and the heat exchange efficiency of the condenser and reducing production costs.

[0011] In some embodiments, the filter unit includes a rotating shaft and a driving member, the rotating shaft is rotatably disposed on the filter cartridge and passes through the filter cartridge, the spiral auger is disposed on the rotating shaft, and the driving member is disposed corresponding to one end of the rotating shaft passing through the filter cartridge and is used to drive the rotating shaft to rotate.

[0012] In some embodiments, the end of the filter cylinder away from the cylinder cover is a plate body, and a connecting hole is provided on the plate body. The filter unit includes a drive box, and the drive box is arranged corresponding to the drive member. The drive member is a worm gear, and the drive member is rotatably arranged on the drive box and fixedly connected to the rotating shaft. The delivery pipe is located at one end in the mounting cylinder and is connected to the drive box.

[0013] In some embodiments, the extension line of the water pipe is tangent to the rotation direction of the driving member, and / or the outer diameter of the spiral auger is equal to the diameter of the filter cartridge.

[0014] In some embodiments, there is a set distance between the connecting ring and an end of the filter cartridge close to the cartridge cover, and a receiving cavity is defined between the filter cartridge, the connecting ring and the mounting cartridge, and the receiving cavity is used to store impurities.

[0015] In some embodiments, a collecting filter cartridge is included, the cross section of which is annular, and the collecting filter cartridge is movably sleeved on the filter cartridge and is used to collect filtered impurities.

[0016] In some embodiments, an observation window is provided on the installation tube corresponding to the accommodating cavity, or the installation tube is made of a transparent material.

[0017] In some embodiments, the connecting ring is provided with a plurality of through holes spaced apart along the circumferential direction, the diameter of the through holes is no greater than the diameter of the filter holes on the filter cartridge, and the through holes are used to filter impurities in the water body.

[0018] In some embodiments, the installation cylinder is detachably connected to the water inlet tank, and the installation cylinder is detachably connected to the filter cylinder.

[0019] In some embodiments, the connecting ring includes a first ring piece and a second ring piece, the first ring piece is fixedly connected to the mounting cylinder, the second ring piece is fixedly connected to the filter cylinder, and the first ring piece and the second ring piece are detachably connected by screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a condenser for cooling a steam turbine according to an embodiment of the present invention.

[0021] Figure 2 The figure is a schematic diagram of the structure of a filter unit in a condenser for cooling a steam turbine according to an embodiment of the present invention.

[0022] Figure 3 The invention is a schematic diagram of the connection of water pipes in a condenser for cooling a steam turbine according to an embodiment of the present invention.

[0023] Figure 4 It is a schematic structural diagram of a filter unit in a condenser for cooling a turbine according to another embodiment of the present invention.

[0024] Reference numerals:

[0025] Condensation box 1; condensation chamber 11; steam inlet 12; water collecting box 13; condensation pipe 14;

[0026] Water inlet tank 2; water inlet 21;

[0027] Drain box 3; Drain outlet 31;

[0028] Filter unit 4; mounting cylinder 41; filter cylinder 42; connecting hole 421; connecting ring 43; through hole 431; first ring piece 432; second ring piece 433; spiral auger 44; water pipe 45; cylinder cover 46; rotating shaft 47; driving member 48; driving box 49. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the condenser for cooling a steam turbine according to an embodiment of the present invention comprises a condenser tank 1, a water inlet tank 2, a water drain tank 3 and a filter unit 4. The condenser tank 1 has a condensation chamber 11 and is provided with a steam inlet 12 and a water collecting tank 13. A plurality of condensation pipes 14 are arranged in the condensation chamber 11 at intervals. Both ends of the condensation pipes 14 extend out of the condenser tank 1 respectively. The water inlet tank 2 and the water drain tank 3 are arranged on both sides of the condenser tank 1 corresponding to both ends of the condensation pipes 14 respectively. The water inlet tank 2 has a water inlet 21 and is connected to the condensation pipes 14. The water drain tank 3 has a water drain port 31 and is connected to the condensation pipes 14. The filter unit 4 comprises The mounting cylinder 41, the filter cylinder 42, the connecting ring 43, the spiral auger 44, the water pipe 45 and the cylinder cover 46, the mounting cylinder 41 is arranged at the water inlet 21, the filter cylinder 42 is arranged in the mounting cylinder 41, the connecting ring 43 is arranged between the mounting cylinder 41 and the filter cylinder 42 to connect the mounting cylinder 41 and the filter cylinder 42, the spiral auger 44 is rotatably arranged in the filter cylinder 42 and is used to transport impurities to the connecting ring 43, the water pipe 45 passes through the mounting cylinder 41 and is connected to the filter cylinder 42, the water pipe 45 is used to transport cooling water to the filter cylinder 42, and the cylinder cover 46 is detachably arranged on the mounting cylinder 41.

[0031] When the condenser for turbine cooling of the embodiment of the present invention is in use, condensed water enters the filter cartridge 42 through the water pipe 45, impurities in the water body are filtered by the filter cartridge 42 and gathered in the filter cartridge 42, and the spiral auger rotates to move the impurities in the filter cartridge 42 away from the bottom of the filter cartridge 42, so that the impurities are accumulated on the connecting ring 43, thereby ensuring the filtering effect of the filter cartridge 42 on impurities, and the filtered water body is condensed by heat exchange at the position of the condenser pipe 14 to condense the steam entering from the steam inlet 12, and the condensed water body is collected at the position of the water collecting tank 13 and then discharged uniformly.

[0032] The condenser for turbine cooling in the embodiment of the present invention can filter the water before entering the condenser 14, preventing impurities in the water from accelerating the crystallization of salts in the condenser 14 to cause blockage of the condenser 14, thereby ensuring the flow cross-section of the condenser 14 and the heat exchange efficiency of the condenser and reducing production costs.

[0033] In some embodiments, Figure 1 , Figure 2 and Figure 4 As shown, the filter unit 4 includes a rotating shaft 47 and a driving member 48. The rotating shaft 47 is rotatably arranged on the filter cartridge 42 and passes through the filter cartridge 42. The spiral auger 44 is arranged on the rotating shaft 47. The driving member 48 is arranged corresponding to one end of the rotating shaft 47 passing through the filter cartridge 42 and is used to drive the rotating shaft 47 to rotate. The rotating shaft 47 is driven to rotate by the driving member 48, and then the rotation speed of the spiral auger 44 in the filter cartridge 42 is adjusted, so as to facilitate the transfer of impurities in the filter cartridge 42 and ensure the filtering effect of the filter cartridge 42.

[0034] Optionally, the driving member 48 is a driving motor, and the output shaft of the driving motor is fixedly connected to the rotating shaft 47 to drive the rotating shaft 47 and the spiral auger 44 to rotate.

[0035] In some embodiments, Figure 1 , Figure 2 and Figure 4 As shown, the end of the filter cartridge 42 away from the cartridge cover 46 is a plate body, and a connecting hole 431421 is provided on the plate body. The filter unit 4 includes a drive box 49, and the drive box 49 is provided corresponding to the drive member 48. The drive member 48 is a worm gear, and the drive member 48 is rotatably provided in the drive box 49 and fixedly connected to the rotating shaft 47. One end of the delivery pipe located in the mounting cartridge 41 is connected to the drive box 49.

[0036] The water in the water pipe 45 drives the worm gear to rotate after entering the drive box 49, and enters the filter cartridge 42 through the connecting holes 431421. Since the connecting holes 431421 are arranged on the plate at the bottom of the filter cartridge 42, the water can impact the water and impurities in the filter cartridge 42 when entering the filter cartridge 42, thereby reducing the precipitation of impurities in the filter cartridge 42. The rotation of the worm gear drives the rotating shaft 47 and the spiral auger 44 to rotate. Compared with the use of a drive motor, it can reduce energy consumption, have low operating costs, be more environmentally friendly, and have no electrical safety hazards during use, so it is safe and reliable.

[0037] In some embodiments, Figure 3 As shown, the extension line of the water pipe 45 is tangent to the rotation direction of the driving member 48, that is, the extension line of the water pipe 45 is tangent to the circle where the ends of the multiple blades of the turbine are located away from each other. The driving box 49 is a barrel structure. By limiting the direction of the extension line of the water pipe 45, when the water in the water pipe 45 enters the driving box 49, the effective driving force of the water on the worm gear can be guaranteed, which is convenient for ensuring the rotation speed of the spiral auger 44.

[0038] In some embodiments, the outer diameter of the spiral auger 44 is equal to the diameter of the filter cartridge 42. By limiting the outer diameter of the spiral auger 44, the spiral auger 44 can be brought into contact with the inner wall of the filter cartridge 42 during rotation. On the one hand, the inner wall of the filter cartridge 42 can be scraped and cleaned to prevent impurities from clogging the filter cartridge 42. On the other hand, the conveying effect of the spiral auger 44 on the impurities in the filter cartridge 42 can be ensured, making it easier to clean the collected impurities.

[0039] In some embodiments, there is a set distance between the connecting ring 43 and one end of the filter cartridge 42 close to the cartridge cover 46, and a receiving chamber is defined between the filter cartridge 42, the connecting ring 43 and the mounting cartridge 41, and the receiving chamber is used to store impurities. By setting the receiving chamber, the spiral auger 44 transports impurities at the bottom of the filter cartridge 42 to the top of the mounting cartridge 41, and the impurities reach the receiving chamber through the gap between the filter cartridge 42 and the mounting cartridge 41 and gather in the receiving chamber, so as to facilitate the collection and cleaning of the impurities.

[0040] Optionally, the distance from the connecting ring 43 to the end of the filter cartridge 42 close to the cartridge cover 46 is defined as L, and the height of the filter cartridge 42 is defined as H, and the following formula 1 / 2≥L / H≥1 / 4 is satisfied.

[0041] In some embodiments, a collecting filter cartridge is included, the cross-section of which is annular. The collecting filter cartridge is movably mounted on the filter cartridge 42 and is used to collect filtered impurities. By setting the collecting filter cartridge, impurities entering the accommodating cavity will directly enter the collecting filter cartridge. When a certain amount of impurities are collected, the collecting filter cartridge can be directly replaced, which facilitates the cleaning of impurities, reduces the cleaning and maintenance time of the device caused by impurity cleaning, improves operating efficiency and reduces production costs.

[0042] In some embodiments, an observation window is provided on the mounting tube 41 corresponding to the accommodating cavity, through which the amount of impurities in the accommodating cavity can be observed, and the impurities in the accommodating cavity can be cleaned in time to ensure the filtering effect of the filter unit 4.

[0043] In some embodiments, the installation tube 41 is made of a transparent material, and the interior of the installation tube 41 can be inspected safely and reliably while ensuring the structural strength of the installation tube 41 .

[0044] In some embodiments, Figure 2 As shown, a plurality of through holes 431 are provided on the connecting ring 43 at intervals along the circumferential direction. The diameter of the through hole 431 is not greater than the diameter of the filter hole on the filter cartridge 42. The through hole 431 is used to filter impurities in the water body. By providing the through hole 431, when the impurities are collected and stored in the accommodating chamber, the backflow and disturbance of the water body in the accommodating chamber can be reduced, thereby facilitating the collection of impurities.

[0045] In some embodiments, the installation cylinder 41 is detachably connected to the water inlet tank 2 , and the installation cylinder 41 is detachably connected to the filter cylinder 42 .

[0046] Specifically, a first flange is provided on the mounting cylinder 41, and a second flange is provided on the water inlet box 2 corresponding to the water inlet 21. The first flange and the second flange are connected by bolts, and a sealing gasket is provided between the first flange and the second flange. The detachable connection between the mounting cylinder 41 and the water inlet box 2 facilitates the cleaning and replacement of the filter unit 4 to ensure efficient operation of the condenser. The detachable connection between the filter cylinder 42 and the mounting cylinder 41 facilitates the cleaning of impurities and the cleaning of the filter cylinder 42, and the filter cylinder 42 can be replaced, which is safe and reliable.

[0047] In some embodiments, Figure 4 As shown, the connecting ring 43 includes a first ring piece 432 and a second ring piece 433. The first ring piece 432 is fixedly connected to the mounting tube 41, and the second ring piece 433 is fixedly connected to the filter tube 42. The first ring piece 432 and the second ring piece 433 are detachably connected by screws. The arrangement of the first ring piece 432 and the second ring piece 433 facilitates the disassembly and installation of the filter tube 42.

[0048] Optionally, the first ring piece 432 and the second ring piece 433 are of equal size, and a corresponding number of fixing holes are provided on the first ring piece 432 and the second ring piece, and screws are threadedly connected in the fixing holes to fix the first ring piece 432 and the second ring piece 433 together to fix the filter cartridge 42. When installing the filter cartridge 42, the first ring piece 432 and the second ring piece 433 are stopped and matched, and the first ring piece 432 can guide the installation of the filter cartridge 42 to facilitate installation.

[0049] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A condenser for cooling a steam turbine, characterized in that: include: A condenser box, the condenser box having a condenser chamber and being provided with a steam inlet and a water collecting tank, wherein a plurality of condenser tubes are arranged in the condenser chamber at intervals, and both ends of the condenser tubes extend out of the condenser box respectively; A water inlet box and a water drain box, the water inlet box and the water drain box are respectively arranged on both sides of the condensation box corresponding to the two ends of the condensation pipe, the water inlet box has a water inlet and is connected to the condensation pipe, and the water drain box has a water drain and is connected to the condensation pipe; A filter unit, the filter unit includes a mounting cylinder, a filter cylinder, a connecting ring, a spiral auger, a water pipe and a cylinder cover, the mounting cylinder is arranged at the water inlet, the filter cylinder is arranged in the mounting cylinder, the connecting ring is arranged between the mounting cylinder and the filter cylinder to connect the mounting cylinder and the filter cylinder, the spiral auger is rotatably arranged in the filter cylinder and is used to transport impurities to the connecting ring, the water pipe passes through the mounting cylinder and is connected to the filter cylinder, the water pipe is used to transport cooling water to the filter cylinder, and the cylinder cover is detachably arranged on the mounting cylinder.

2. The condenser for cooling a steam turbine according to claim 1, characterized in that: The filter unit includes a rotating shaft and a driving member. The rotating shaft is rotatably arranged on the filter cartridge and passes through the filter cartridge. The spiral auger is arranged on the rotating shaft. The driving member is arranged corresponding to one end of the rotating shaft passing through the filter cartridge and is used to drive the rotating shaft to rotate.

3. The condenser for cooling a steam turbine according to claim 2, characterized in that: The end of the filter cylinder away from the cylinder cover is a plate body, and a connecting hole is provided on the plate body. The filter unit includes a drive box, and the drive box is arranged corresponding to the drive member. The drive member is a worm gear, and the drive member is rotatably arranged on the drive box and fixedly connected to the rotating shaft. The delivery pipe is located in the installation cylinder and is connected to the drive box at one end.

4. The condenser for cooling a steam turbine according to claim 3, characterized in that: The extension line of the water delivery pipe is tangent to the rotation direction of the driving member, and / or the outer diameter of the spiral auger is equal to the diameter of the filter cartridge.

5. The condenser for cooling a steam turbine according to claim 1, characterized in that: There is a set distance between the connecting ring and one end of the filter cartridge close to the cartridge cover, and a receiving cavity is defined between the filter cartridge, the connecting ring and the mounting cartridge, and the receiving cavity is used to store impurities.

6. The condenser for cooling a steam turbine according to claim 5, characterized in that: It comprises a collecting filter cartridge, the cross section of which is annular, and the collecting filter cartridge is movably sleeved on the filter cartridge and is used for collecting filtered impurities.

7. The condenser for cooling a steam turbine according to claim 5, characterized in that: An observation window is provided on the installation tube corresponding to the accommodating cavity, or the installation tube is made of transparent material.

8. The condenser for cooling a steam turbine according to claim 5, characterized in that: The connecting ring is provided with a plurality of through holes at intervals along the circumferential direction, the diameter of the through holes is not greater than the diameter of the filter holes on the filter cartridge, and the through holes are used to filter impurities in the water body.

9. The condenser for cooling a steam turbine according to claim 5, characterized in that: The installation cylinder is detachably connected to the water inlet tank, and the installation cylinder is detachably connected to the filter cylinder.

10. The condenser for cooling a steam turbine according to claim 9, characterized in that: The connecting ring comprises a first ring piece and a second ring piece, the first ring piece is fixedly connected to the mounting cylinder, the second ring piece is fixedly connected to the filter cylinder, and the first ring piece and the second ring piece are detachably connected by screws.

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