Hot well drainage device of steam turbine condenser of thermal power plant

Abstract

The utility model relates to the technical field of steam turbine hot wells, and discloses a hot well drainage device of a steam turbine condenser of a thermal power plant, which comprises a steam turbine condenser main body, an outer side connecting frame is arranged on the outer side of a drainage hot well, and the top end of the outer side connecting frame is connected with the bottom end of the steam turbine condenser main body. A water drainage anti-blocking assembly used for filtering and collecting impurities is arranged in the water drainage hot well, the impurity filtering net plate in the water drainage anti-blocking assembly can filter the impurities gathered in the impurity filtering net plate after the steam turbine condenser body is condensed, the impurities can be filtered out through the water drainage anti-blocking assembly, and the water drainage anti-blocking assembly is used for filtering and collecting the impurities. And the bottom closing plate can be taken out by a user, so that the impurity filtering net plate and impurities on the impurity filtering net plate can be taken out together, the impurities accumulated in the drainage hot well can be quickly cleaned, the operation is simple and convenient, the use of the user is more convenient, and the normal drainage efficiency of the drainage hot well is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine hot wells, in particular to a hot well drainage device for a steam turbine condenser in a thermal power plant. Background Art

[0002] The hot well is a water collection well at the bottom of the condenser. The full name is "condenser hot well", commonly known as "hot water well". It is a vertical cylindrical component installed at the bottom of the turbine surface condenser. It is used to collect the main condensate generated by the continuous condensation of a large amount of exhaust steam.

[0003] After searching, the authorized Chinese patent announcement number CN 219890215 U discloses a hot well drainage device for a steam turbine condenser in a thermal power plant in the field of drainage technology, including a bottom fixing plate, a protective cover is arranged on the top of the bottom fixing plate, the protective cover is hollow, a water pump is arranged inside the protective cover, the output end of the water pump is arranged toward the top, an output pipe is arranged on the output end of the water pump, a top plate is fixedly connected to the top of the protective cover, a connecting pipe is arranged on the top of the top plate, and the bottom of the connecting pipe passes through the top plate and is detachably connected to the top of the output pipe. The beneficial effect of the utility model is that when the device is in use, it can be hoisted to the hot well at any time for drainage operations, and the debris in the water in the hot well can be filtered while avoiding damage to the water pump.

[0004] The hot well in the above patent still has certain shortcomings. Although the existing hot well drainage device of the steam turbine condenser in a thermal power plant can drain water quickly, the water droplets condensed in the condenser still contain some impurities. The condensed water droplets gather in the hot well for a long time. The continuously accumulated impurities will still cause a certain blockage to the hot well drainage outlet, affecting the normal hot well drainage efficiency. There are certain hidden dangers in use. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a hot well drainage device for a steam turbine condenser in a thermal power plant, which solves the problem that the existing hot well drainage device for a steam turbine condenser in a thermal power plant can drain water quickly, but because the water droplets condensed in the condenser still contain some impurities, and the condensed water droplets gather in the hot well for a long time, the continuously accumulated impurities will still cause a certain blockage to the hot well drainage outlet, affecting the normal hot well drainage efficiency, and there are certain hidden dangers in use.

[0006] The utility model provides the following technical solution: a hot well drainage device for a steam turbine condenser in a thermal power plant, comprising a steam turbine condenser body, a drainage hot well is arranged at the bottom of the steam turbine condenser body, the steam turbine condenser body and the drainage hot well are connected through a water injection pipe, an outer connecting frame is arranged at the outer side of the drainage hot well, the top of the outer connecting frame is connected to the bottom end of the steam turbine condenser body, a drainage anti-blocking component for impurity filtering and collection is arranged in the drainage hot well, two guide plates are symmetrically arranged at the top of the side wall of the drainage hot well, the side of the bottom end of the drainage hot well is connected with a drainage pipe, and a valve is arranged on the drainage pipe;

[0007] The drainage anti-blocking component includes a bottom discharge port opened in the middle of the bottom end of the drainage hot well, a bottom closing plate is arranged in the bottom discharge port, a connecting base is arranged at the top end of the bottom closing plate, two impurity filter screens are symmetrically hingedly arranged on both sides of the connecting base, and the inner side walls of the two impurity filter screens are hingedly arranged with two side hinged rods, and the two side hinged rods are elastically connected by a tension spring, and fixing bolts are inserted on both sides of the bottom end of the bottom closing plate, and the ends of the fixing bolts are inserted into the drainage hot well.

[0008] Preferred technical solution 1: Two side support plates are symmetrically arranged on both sides of the impurity filtering screen plate, the bottom ends of the side support plates are connected to the drainage hot well, and water holes are opened at the bottom ends of the side support plates.

[0009] Preferred technical solution 2: the guide plate is arranged to be inclined downward, and the bottom end of the guide plate extends to the upper part of the impurity filtering screen plate.

[0010] Preferred technical solution three: the bottom end of the drainage hot well is inclined downward, and the bottom end of the drainage hot well is connected to the drainage pipe.

[0011] This solution can enable the water entering the drainage hot well to be discharged from the drainage pipe more quickly.

[0012] Preferred technical solution four: the front and rear side walls of the impurity filtering screen plate are both in contact with the inner wall of the drainage hot well.

[0013] This solution enables the impurity filter screen to better centrally filter and collect impurities in the water flow that flows into the drainage hot well through the water injection pipe.

[0014] Preferred technical solution five: A sealing gasket for sealing is provided on the side of the bottom closing plate.

[0015] This solution can make the bottom closing plate more tightly sealed for the bottom discharge port, effectively preventing water leakage in the drainage hot well.

[0016] Compared with the prior art, the utility model provides a hot well drainage device for a steam turbine condenser in a thermal power plant, which has the following beneficial effects:

[0017] (1) The utility model provides a drainage anti-clogging component in the drainage hot well, wherein the impurity filter screen in the drainage anti-clogging component can centrally filter the impurities in the water flow injected into the drainage hot well through the water injection pipe after the condensation of the turbine condenser body, so that the impurities will not accumulate in the drainage pipe, but will gather under the gathering and filtering of the impurity filter screen, thereby preventing the impurities from continuously accumulating in the drainage pipe and causing blockage in the subsequent drainage of the drainage pipe. The impurities accumulated in the impurity filter screen can also be removed by the user through the removal of the bottom closing plate, thereby taking out the impurity filter screen and the impurities thereon together, so that the impurities accumulated in the drainage hot well can be quickly cleaned up, which is simple and convenient, more convenient for users to use, and improves the normal drainage efficiency of the drainage hot well. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the main cross-section of the structure of the utility model;

[0020] Figure 3 For the utility model Figure 2 A magnified view of the structure of the middle and bottom discharge port;

[0021] Figure 4 For the utility model Figure 2 Enlarged view of the structure of the middle and side support plates.

[0022] In the figure:

[0023] 1. Steam turbine condenser body; 2. Drainage hot well; 3. Water injection pipe; 4. Outer connecting frame; 5. Drainage anti-blocking assembly; 6. Guide plate; 7. Drainage pipe; 8. Valve;

[0024] 501, bottom discharge port; 502, bottom closing plate; 503, connecting base; 504, impurity filter screen plate; 505, side hinge rod; 506, tension spring; 507, fixing bolt; 508, side support plate; 509, water hole. DETAILED DESCRIPTION

[0025] See also Figure 1-4 A hot well drainage device for a steam turbine condenser in a thermal power plant comprises a steam turbine condenser body 1, a hot well drainage 2 is arranged at the bottom of the steam turbine condenser body 1, the steam turbine condenser body 1 and the hot well drainage 2 are connected by a water injection pipe 3, and an outer connecting frame 4 is arranged on the outer side of the hot well drainage 2.

[0026] The top end of the outer connecting frame 4 is connected to the bottom end of the turbine condenser body 1, and a drainage anti-blocking component 5 for filtering and collecting impurities is arranged in the drainage hot well 2. Two guide plates 6 are symmetrically arranged at the top end of the side wall of the drainage hot well 2. The side of the bottom end of the drainage hot well 2 is connected to a drainage pipe 7, and a valve 8 is arranged on the drainage pipe 7.

[0027] The drainage anti-clogging component 5 includes a bottom discharge port 501 opened in the middle of the bottom end of the drainage hot well 2, a bottom closing plate 502 is arranged in the bottom discharge port 501, a connecting base 503 is arranged at the top of the bottom closing plate 502, and two impurity filter screen plates 504 are symmetrically hingedly arranged on both sides of the connecting base 503, and the inner side walls of the two impurity filter screen plates 504 are hingedly arranged with two side hinged rods 505.

[0028] The two side hinge rods 505 are elastically connected by a tension spring 506, and fixing bolts 507 are inserted on both sides of the bottom end of the bottom closing plate 502. The ends of the fixing bolts 507 are inserted into the drainage hot well 2. Two side support plates 508 are symmetrically arranged on both sides of the impurity filtering screen plate 504. The bottom ends of the side support plates 508 are connected to the drainage hot well 2, and the bottom ends of the side support plates 508 are opened with water holes 509.

[0029] The guide plate 6 is arranged to be inclined downward, and the bottom end of the guide plate 6 extends to the upper part of the impurity filtering screen plate 504 .

[0030] Embodiment 2: The difference between this embodiment and embodiment 1 is that the bottom end of the drainage hot well 2 is inclined downward, and the bottom end of the drainage hot well 2 is connected to the drainage pipe 7.

[0031] This allows the water that enters the drainage hot well 2 to be discharged from the drainage pipe 7 more quickly.

[0032] Embodiment 3: The difference between this embodiment and embodiment 1 is that the front and rear side walls of the impurity filtering screen plate 504 are both in contact with the inner wall of the drainage hot well 2 .

[0033] The impurity filtering mesh plate 504 can better filter and collect impurities in the water flow flowing into the drainage hot well 2 through the water injection pipe 3.

[0034] Embodiment 4: The difference between this embodiment and embodiment 1 is that a sealing gasket for sealing is provided on the side of the bottom closing plate 502 .

[0035] The bottom closing plate 502 can seal the bottom discharge port 501 more tightly, thereby effectively preventing water leakage in the drainage hot well 2.

[0036] In this embodiment, although the existing hot well drainage device of the steam turbine condenser in a thermal power plant can drain water quickly, the water droplets condensed in the condenser still contain some impurities, and the condensed water droplets gather in the hot well for a long time. The continuously accumulated impurities will still cause a certain blockage to the hot well drainage outlet, affecting the normal hot well drainage efficiency, and there are certain hidden dangers in use.

[0037] In summary, in specific implementation, when the steam in the working process of the steam turbine of the thermal power plant enters the turbine condenser body 1, it will form a water flow through the condensation effect of the turbine condenser body 1, and be discharged into the drainage hot well 2 through the water injection pipe 3. Since the condensed water will contain certain impurities, a drainage anti-blocking component 5 is provided in the drainage hot well 2. The drainage anti-blocking component 5 can centrally filter and collect the water impurities that fall into the drainage hot well 2, so that the condensed water flow can be discharged from the drainage pipe 7 faster without causing blockage to the drainage pipe 7.

[0038] The impurity filter plate 504 in the drainage anti-clogging component 5 is located in the middle of the bottom end of the drainage hot well 2, and the top end of the impurity filter plate 504 is inclined, and the bottom end of the guide plate 6 extends to the upper part of the impurity filter plate 504, thereby guiding the water flow entering the drainage hot well 2 to the impurity filter plate 504, and the impurity filter plate 504 can effectively filter the impurities in the water flow, so that the impurities in the water flow are intercepted and filtered by the impurity filter plate 504, and the filtered water flow can be easily discharged outward through the drain pipe 7.

[0039] When a certain amount of impurities accumulate on the impurity filter screen plate 504, the user can also pull out the fixing bolts 507 to remove the bottom closing plate 502 from the bottom discharge port 501, thereby driving the impurity filter screen plate 504 hingedly connected to the base 503 on the bottom closing plate 502 to be taken out from the bottom discharge port 501, thereby quickly removing and cleaning the impurities in the impurity filter screen plate 504, avoiding the continuous accumulation of impurities at the bottom of the drainage hot well 2, affecting the normal drainage efficiency of the drainage pipe 7, and making it more convenient for users to use.

Claims

1. A hot well drainage device for a steam turbine condenser in a thermal power plant, comprising a steam turbine condenser body (1), characterized in that: A drainage hot well (2) is provided at the bottom of the steam turbine condenser body (1), the steam turbine condenser body (1) and the drainage hot well (2) are connected via a water injection pipe (3), an outer connecting frame (4) is provided on the outside of the drainage hot well (2), the top of the outer connecting frame (4) is connected to the bottom of the steam turbine condenser body (1), a drainage anti-blocking component (5) for filtering and collecting impurities is provided in the drainage hot well (2), two guide plates (6) are symmetrically provided at the top of the side wall of the drainage hot well (2), the side of the bottom end of the drainage hot well (2) is connected to a drainage pipe (7), and a valve (8) is provided on the drainage pipe (7); The drainage anti-clogging component (5) comprises a bottom discharge port (501) opened in the middle of the bottom end of the drainage hot well (2), a bottom closing plate (502) is arranged in the bottom discharge port (501), a connecting base (503) is arranged at the top of the bottom closing plate (502), two impurity filter screens (504) are symmetrically hingedly arranged on both sides of the connecting base (503), the inner side walls of the two impurity filter screens (504) are hingedly arranged with two side hinge rods (505), the two side hinge rods (505) are elastically connected by a tension spring (506), and fixing bolts (507) are inserted on both sides of the bottom end of the bottom closing plate (502), and the ends of the fixing bolts (507) are inserted into the drainage hot well (2).

2. The hot well drainage device for a steam turbine condenser in a thermal power plant according to claim 1, characterized in that: Two side support plates (508) are symmetrically arranged on both sides of the impurity filtering screen plate (504); the bottom ends of the side support plates (508) are connected to the drainage hot well (2); and the bottom ends of the side support plates (508) are provided with water holes (509).

3. The hot well drainage device for a steam turbine condenser in a thermal power plant according to claim 2, characterized in that: The guide plate (6) is arranged to be inclined downward, and the bottom end of the guide plate (6) extends to the upper part of the impurity filtering screen plate (504).

4. The hot well drainage device for a steam turbine condenser in a thermal power plant according to claim 3, characterized in that: The bottom end of the drainage hot well (2) is inclined downward, and the bottom end of the drainage hot well (2) is connected to the drainage pipe (7).

5. The hot well drainage device for a steam turbine condenser in a thermal power plant according to claim 4, characterized in that: The front and rear side walls of the impurity filtering screen plate (504) are both in contact with the inner wall of the drainage hot well (2).

6. The hot well drainage device for a steam turbine condenser in a thermal power plant according to claim 5, characterized in that: The side edge of the bottom closing plate (502) is provided with a sealing gasket for sealing.

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