Water deaerator

Abstract

The utility model belongs to the technical field of deaerators, and discloses a water deaerator which comprises a deaerating tank, a water inlet, an exhaust port, a heating steam inlet, an auxiliary heating steam port and a high-pressure heater drain port are arranged at the top of the deaerating tank, a water outlet is arranged at the bottom of the deaerating tank, and an overflow port is arranged in the middle of the deaerating tank. An overflow port is arranged in the deoxidizing tank, a steam cavity is formed in the area, located above the overflow port, in the deoxidizing tank, a water storage cavity is formed in the area, located below the overflow port, in the deoxidizing tank, an ejector extending into the steam cavity is arranged in the water inlet, a water baffle right opposite to the ejector is arranged on the inner wall of the deoxidizing tank, and the ejector is matched with the water baffle to atomize water; an exhaust pipeline is arranged at the outer port of the exhaust port; a first steam pipeline is arranged at an inner port of the heating steam inlet; a second steam pipeline is arranged at the inner port of the auxiliary heating steam port; and a high-pressure heater drain pipeline is arranged at the inner port of the high-pressure heater drain port. The water deaerator is more compact in structure, high in heat exchange efficiency, low in effluent oxygen content and reliable to use.

Description

Technical Field

[0001] The utility model relates to the technical field of deaerators, in particular to a water deaerator. Background Art

[0002] At present, conventional deaerators with deaerator heads are widely used in domestic thermal power plants. There are several types of deaerators, such as rotary film type, spray packing type, and water spray plate type. There are two types of installation forms, vertical deaerator head and horizontal deaerator head. The deaerator process is completed in the deaerator head, including the initial deaerator in the rotary film section (spray layer), which can remove most of the gas in the water, and deep deaerator in the packing layer or water spray plate below to remove the residual gas in the water.

[0003] The traditional deaerator is a thermal deaerator (i.e., a rotary film deaerator), which consists of an external deaerator head and a water tank. It has the following problems: 1) The water tank has a complex structure, a large volume, poor operating performance, requires a large installation space, and has high manufacturing and installation costs; 2) The deaerator head and the water tank are independently composed, and the overall height of the equipment is high. It needs to be transported separately and assembled on site, which is difficult to transport and assemble; 3) The internal structure of the deaerator head is complex, consisting of a rotary film tube, filler, distribution plate, etc., with a high failure rate and inconvenient maintenance; 4) When running at low load, it cannot ensure good atomization or filmization of water, resulting in poor effect of water being heated by heated steam and gas-water separation, and thus cannot effectively deoxygenate; 5) When designing the water tank, it is necessary to consider the weight of the deaerator head, the large opening and the stress and thermal stress caused by the steam temperature, which increases the thickness of the water tank and increases the steel consumption; 6) While discharging oxygen, a large amount of water vapor is also released at the same time, resulting in serious energy waste. Utility Model Content

[0004] Based on the above problems, the purpose of the utility model is to provide a water deaerator, optimize the structure of the deaerator, improve the integrity and functionality of the equipment, and ensure the deoxygenation efficiency.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A water deaerator comprises a deaerator tank, wherein a water inlet, an exhaust port, a heating steam inlet, an auxiliary heating steam port and a high pressure water drain port are arranged at the top of the deaerator tank, a water outlet is arranged at the bottom of the deaerator tank, an overflow port is arranged in the middle of the deaerator tank, the interior of the deaerator tank and the area above the overflow port is a steam chamber, and the interior of the deaerator tank and the area below the overflow port is a water storage chamber;

[0007] An ejector extending into the steam chamber is arranged in the water inlet, and a water baffle directly facing the ejector is arranged on the inner wall of the deaerator. The ejector and the water baffle cooperate to atomize the water;

[0008] The exhaust port is located on one side or both sides of the water inlet, and an exhaust pipeline is arranged at the outer end of the exhaust port;

[0009] The inner port of the heating steam inlet is provided with a first steam pipeline extending to the water storage chamber, and the first steam pipeline is used to perform mixed heat transfer on the water in the water storage chamber so that the water quickly reaches the saturation temperature under the working pressure;

[0010] The inner end of the auxiliary heating steam port is provided with a second steam pipeline extending to the water storage chamber, and the second steam pipeline is used to increase the partial pressure of the steam in the steam chamber to promote the escape of the gas dissolved in the water;

[0011] The inner port of the high-pressure heater drain port is provided with a high-pressure heater drain pipeline extending to the water storage chamber, and the high-pressure heater drain pipeline is used to separate the water and gas in the water storage chamber.

[0012] As an optional solution, the ejector includes a water chamber, the upper end of which is connected to the water inlet, and the lower end of which is stacked with a number of water outlet rings and an end plate in sequence. The end plate is fixed to the water chamber by bolts, and the end plate closes the lower end of the water chamber. Each water outlet ring is circumferentially provided with a plurality of water spray holes, a filter is arranged between the water chamber and each water spray hole, and the filter is fixed by bolts, and a nozzle connected to one or more water spray holes is arranged on the outer surface of the water outlet ring.

[0013] As an optional solution, the nozzle includes several pairs of annular plates, each pair of annular plates includes two elastic fins abutting against each other, and a closed cavity connected to all water spray holes of a water outlet circle is formed between the two elastic fins. When the pressure in the closed cavity reaches a set value, the two elastic fins separate.

[0014] As an optional solution, the water chamber, the water outlet ring and the end plate are respectively provided with step surfaces that lock with each other, and the elastic fin is clamped between the step surface of the water chamber and the step surface of the water outlet ring, between the step surfaces of two adjacent water outlet rings, or between the step surface of the water outlet ring and the step surface of the end plate.

[0015] As an optional solution, a plurality of engaging portions are radially arranged on the elastic fin, and the engaging portions divide the closed cavity into a plurality of cavities.

[0016] As an optional solution, the exhaust pipeline includes an exhaust main pipe, an exhaust branch pipe and an exhaust valve. The exhaust main pipe is arranged obliquely, and the high end of the exhaust main pipe is the exhaust end. A drain pipe is provided at the low end of the exhaust main pipe. The air inlet end of the exhaust valve is connected to the exhaust port, and the air outlet end of the exhaust valve is connected to the lower end of the exhaust branch pipe. A throttling orifice plate is provided between the exhaust valve and the exhaust branch pipe. The upper end of the exhaust branch pipe extends into the middle of the exhaust main pipe, and the upper end face of the exhaust branch pipe is an inclined plane opposite to the inclination direction of the exhaust main pipe.

[0017] As an optional solution, the first steam pipeline includes a first vertical connecting pipe, the upper end of which is connected to the heating steam inlet, the lower end of which extends to near the bottom of the deaerator and is provided with a first transverse connecting pipe, the first transverse connecting pipe is arranged and fixed along the bottom of the deaerator by a first bracket, and a plurality of first open hole pipes are provided on the first transverse connecting pipe along its axial direction.

[0018] As an optional solution, the second steam pipeline includes a second vertical connecting pipe connected to the auxiliary heating steam port, a second transverse connecting pipe is arranged on the second vertical connecting pipe, the second transverse connecting pipe is arranged and fixed along the top of the deaerator tank through a second bracket, and a plurality of second open hole pipes are arranged on the second transverse connecting pipe along its axial direction, and the lower end of the second open hole pipe extends to near the bottom of the deaerator tank.

[0019] As an optional solution, the high-pressure heater drain pipeline includes a third vertical connecting pipe connected to the high-pressure heater drain port, the lower end of the third vertical connecting pipe extends to near the bottom of the deaerator tank and extends a third horizontal connecting pipe along the bottom of the deaerator tank, the third horizontal connecting pipe is fixed to the deaerator tank by a third bracket, and a plurality of perforations are evenly arranged on the upper half of the pipe wall of the third horizontal connecting pipe.

[0020] As an optional solution, the deaerator tank is a horizontal tank, with heads provided at both ends of the deaerator tank, manholes provided on the heads, two steam balance ports provided on the top of the deaerator tank, the two steam balance ports are respectively connected to the heating steam inlet and the auxiliary heating steam port through a balance valve, and a drain port and a water balance port are also provided at the bottom of the deaerator tank.

[0021] The beneficial effects of the utility model are as follows: the water deaerator is designed with multiple deaerator tank interfaces and internal functional pipelines, which heat water by steam and gradually increase the partial pressure of steam on the water surface, while the partial pressure of dissolved gas gradually decreases, thereby causing the gas dissolved in the water to continuously escape; the built-in structure is more compact, the heat exchange efficiency is high, the oxygen content of the outlet water is low, and the use is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the water deaerator provided by the embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of an ejector involved in an embodiment of the utility model;

[0024] Figure 3 yes Figure 2 A magnified image of point A;

[0025] Figure 4 It is a schematic diagram of the structure of the exhaust pipeline involved in the embodiment of the utility model.

[0026] In the attached figure:

[0027] 100, deaerator tank; 101, water inlet; 102, exhaust port; 103, heating steam inlet; 104, auxiliary heating steam port; 105, high pressure heater drain port; 106, water outlet; 107, overflow port; 108, manhole; 109, steam balance port; 110, balance valve; 111, drain port; 112, water balance port;

[0028] 200, ejector; 210, water chamber; 220, water outlet ring; 221, water spray hole; 230, end plate; 240, bolt; 250, filter screen; 260, nozzle; 261, elastic fin; 262, closing cavity; 263, bite part; 270, step profile;

[0029] 300, water retaining plate;

[0030] 400, exhaust pipeline; 410, exhaust main pipe; 420, exhaust branch pipe; 421, inclined plane; 430, exhaust valve; 440, drain pipe; 450, throttling orifice plate;

[0031] 500, first steam pipeline; 510, first vertical pipe; 520, first horizontal pipe; 530, first bracket; 540, first perforated pipe;

[0032] 600, second steam pipeline; 610, second vertical pipe; 620, second horizontal pipe; 630, second bracket; 640, second perforated pipe;

[0033] 700, high pressure heater drain pipe; 710, third vertical connecting pipe; 720, third horizontal connecting pipe; 721, perforation; 730, third bracket. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] See also Figures 1 to 4 As shown, the present preferred embodiment provides a water deaerator, including a deaerator tank 100, wherein a water inlet 101, an exhaust port 102, a heating steam inlet 103, an auxiliary heating steam port 104 and a high pressure drain port 105 are arranged at the top of the deaerator tank 100, a water outlet 106 is arranged at the bottom of the deaerator tank 100, an overflow port 107 is arranged in the middle of the deaerator tank 100, the interior of the deaerator tank 100 and the area above the overflow port 107 are steam chambers, and the interior of the deaerator tank 100 and the area below the overflow port 107 are water storage chambers.

[0039] The water inlet 101 is provided with an ejector 200 extending into the steam chamber, and the inner wall of the deaerator 100 is provided with a water baffle 300 facing the ejector 200. The ejector 200 cooperates with the water baffle 300 to atomize the water.

[0040] The exhaust port 102 is located at one side or both sides of the water inlet 101, and an exhaust pipeline 400 is provided at the outer end of the exhaust port 102;

[0041] The inner port of the heating steam inlet 103 is provided with a first steam pipeline 500 extending to the water storage chamber, and the first steam pipeline 500 is used to perform mixed heat transfer on the water in the water storage chamber so that the water quickly reaches the saturation temperature under the working pressure;

[0042] The inner end of the auxiliary heating steam port 104 is provided with a second steam pipeline 600 extending to the water storage chamber, and the second steam pipeline 600 is used to increase the partial pressure of the steam in the steam chamber to promote the escape of the gas dissolved in the water;

[0043] The inner end of the high pressure heater drain port 105 is provided with a high pressure heater drain pipeline 700 extending to the water storage chamber. The high pressure heater drain pipeline 700 is used to separate the water and gas in the water storage chamber.

[0044] Therefore, the water deaerator is designed with multiple deaerator tank 100 interfaces and internal functional pipelines, which heat water through steam, and gradually increase the partial pressure of steam on the water surface, while the partial pressure of dissolved gas gradually decreases, thereby causing the gas dissolved in the water to continuously escape. The built-in structure is more compact, has high heat exchange efficiency, low oxygen content in outlet water, and is reliable to use.

[0045] Specifically, see Figure 2 and Figure 3 The ejector 200 here includes a water chamber 210, the upper end of which is connected to the water inlet 101, and the lower end of the water chamber 210 is stacked with a plurality of water outlet rings 220 and an end plate 230 in sequence, the end plate 230 is fixedly connected to the water chamber 210 by bolts 240, and the end plate 230 closes the lower end of the water chamber 210, and a plurality of water spray holes 221 are distributed circumferentially on each water outlet ring 220, and a filter screen 250 is arranged between the water chamber 210 and each water spray hole 221, and the filter screen 250 is fixed by bolts 240, and the outer surface of the water outlet ring 220 is provided with a nozzle 260 connected to one or more water spray holes 221. The number of water outlet rings 220 can be increased or decreased as needed, and the number of nozzles 260 can also be increased or decreased accordingly.

[0046] Furthermore, the nozzle 260 here adopts a butterfly structure, specifically including a plurality of pairs of annular plates, each pair of annular plates including two elastic fins 261 abutting against each other, and a closed cavity 262 connected to all the water spray holes 221 of a water outlet circle 220 is formed between the two elastic fins 261, and when the pressure in the closed cavity 262 reaches a set value, the two elastic fins 261 separate. Thus, the condensed water flows into the water chamber 210 through the water inlet 101, and then is filtered through the filter 250. Under the action of water pressure, the two elastic fins 261 of each pair of annular plates separate, and the condensed water sprays out from the inside to the outside, thereby forming water mist.

[0047] In particular, the water chamber 210, the water outlet ring 220 and the end plate 230 are respectively provided with step surfaces 270 that snap into each other, and the elastic fin 261 is clamped between the step surface 270 of the water chamber 210 and the step surface 270 of the water outlet ring 220, between the step surfaces 270 of two adjacent water outlet rings 220, or between the step surface 270 of the water outlet ring 220 and the step surface 270 of the end plate 230, thereby ensuring that each elastic fin 261 is reliably fixed without the need for other fasteners.

[0048] Furthermore, a plurality of engaging portions 263 are radially arranged on the elastic fin 261 , and the engaging portions 263 divide the closed cavity 262 into a plurality of cavities, so that the injection triggering pressure can be designed to enhance the atomization effect.

[0049] Specifically, see Figure 4 The exhaust pipeline 400 here includes an exhaust main pipe 410, an exhaust branch pipe 420 and an exhaust valve 430. The exhaust main pipe 410 is arranged obliquely, and the high end of the exhaust main pipe 410 is the exhaust end. A drain pipe 440 is provided at the low end of the exhaust main pipe 410. The air inlet end of the exhaust valve 430 is connected to the exhaust port 102, and the air outlet end of the exhaust valve 430 is connected to the lower end of the exhaust branch pipe 420. A throttling orifice plate 450 is provided between the exhaust valve 430 and the exhaust branch pipe 420. The upper end of the exhaust branch pipe 420 extends into the middle part of the exhaust main pipe 410, and the upper end face of the exhaust branch pipe 420 is an inclined surface 421 opposite to the inclination direction of the exhaust main pipe 410.

[0050] Preferably, the exhaust main pipe 410 is arranged at an angle of 10°, and the upper end of the exhaust branch pipe 420 extends into the exhaust main pipe 410 by about 15 mm to prevent water vapor in the exhaust gas from flowing back to the exhaust branch pipe 420 .

[0051] Specifically, see Figure 1 The first steam pipeline 500 here includes a first vertical pipe 510, the upper end of the first vertical pipe 510 is connected to the heating steam inlet 103, the lower end of the first vertical pipe 510 extends to the bottom of the deaerator tank 100 and is provided with a first transverse pipe 520, the first transverse pipe 520 is arranged and fixed along the bottom of the deaerator tank 100 through a first bracket 530, and a plurality of first open hole pipes 540 are provided on the first transverse pipe 520 along its axial direction.

[0052] Thus, the heating steam enters the first vertical pipe 510, and is then discharged from the through hole of the first perforated pipe 540 on the first horizontal pipe 520. When the water is heated to the boiling temperature under the corresponding pressure, the water no longer has the ability to dissolve gas, that is, the gas (including oxygen) dissolved in the water can be removed. The steam discharged from the first steam pipeline 500 of this structure has good uniformity, a more reasonable arrangement, and a high heat exchange efficiency.

[0053] Specifically, see Figure 1 The second steam pipeline 600 here includes a second vertical pipe 610 connected to the auxiliary heating steam port 104, and a second transverse pipe 620 is arranged on the second vertical pipe 610. The second transverse pipe 620 is arranged and fixed along the top of the deaerator tank 100 through a second bracket 630. A plurality of second perforated pipes 640 are arranged on the second transverse pipe 620 along its axial direction, and the lower end of the second perforated pipe 640 extends to near the bottom of the deaerator tank 100.

[0054] Thus, steam enters from the second vertical pipe 610 and is discharged from the through hole of the second perforated pipe 640 on the second transverse pipe 620, which not only heats the temperature in the steam chamber and increases the partial pressure of the steam, but also helps to increase the water temperature.

[0055] The amount of gas dissolved in water is mainly determined by two aspects. On the one hand, it is directly proportional to the partial pressure of the gas on the water surface (that is, the higher the pressure, the greater the solubility of the gas in water, and vice versa); on the other hand, it is related to the temperature of the water (that is, the higher the temperature of the water, the smaller the solubility of the gas in water. When the temperature is the saturation temperature under the corresponding working pressure, the solubility of the gas in water is zero).

[0056] The first steam pipeline 500 mainly heats water through steam to increase the water temperature; the second steam pipeline 600 mainly increases the partial pressure of steam on the water surface, while the partial pressure of dissolved gas gradually decreases. When the water is heated to the saturation temperature under the corresponding pressure, the water surface is all water vapor, the partial pressure of dissolved gas is zero, and the water no longer has the ability to dissolve gas, that is, the gas dissolved in the water, including oxygen, can be removed. Therefore, the first steam pipeline 500 and the second steam pipeline 600 are used in combination, with high working efficiency and significant deoxygenation effect.

[0057] Specifically, see Figure 1 The high-pressure heater drain pipeline 700 here includes a third vertical pipe 710 connected to the high-pressure heater drain port 105, the lower end of the third vertical pipe 710 extends to the bottom of the deaerator tank 100 and extends a third horizontal pipe 720 along the bottom of the deaerator tank 100, the third horizontal pipe 720 is fixed to the deaerator tank 100 by a third bracket 730, and a plurality of through holes 721 are evenly opened on the upper half of the pipe wall of the third horizontal pipe 720.

[0058] As a result, the high-pressure drain produces a violent mixing and heating effect with the water in a very short time and a very small stroke, the water temperature is greatly increased, and the gas and impurities in the water are effectively removed.

[0059] In addition, the deaerator tank 100 here is preferably a horizontal tank, and both ends of the deaerator tank 100 are respectively provided with heads, and a manhole 108 is provided on the head. The top of the deaerator tank 100 is also provided with two steam balance ports 109, and the two steam balance ports 109 are respectively connected to the heating steam inlet 103 and the auxiliary heating steam port 104 through a balance valve 110. The bottom of the deaerator tank 100 is also provided with a drain port 111 and a water balance port 112 to maintain the water and steam balance in the deaerator tank 100 and ensure reliable operation.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A water deaerator, characterized in that: The invention comprises a deaerator (100), wherein the top of the deaerator (100) is provided with a water inlet (101), an exhaust port (102), a heating steam inlet (103), an auxiliary heating steam port (104) and a high pressure water drain port (105), the bottom of the deaerator (100) is provided with a water outlet (106), the middle of the deaerator (100) is provided with an overflow port (107), the interior of the deaerator (100) and the area above the overflow port (107) is a steam chamber, and the interior of the deaerator (100) and the area below the overflow port (107) is a water storage chamber, The water inlet (101) is provided with an ejector (200) extending into the steam chamber, the inner wall of the deaerator (100) is provided with a water baffle (300) directly facing the ejector (200), and the ejector (200) cooperates with the water baffle (300) to atomize water; The exhaust port (102) is located on one side or both sides of the water inlet (101), and an exhaust pipeline (400) is provided at the outer end of the exhaust port (102); The inner port of the heating steam inlet (103) is provided with a first steam pipeline (500) extending to the water storage chamber, and the first steam pipeline (500) is used to perform mixed heat transfer on the water in the water storage chamber so that the water quickly reaches the saturation temperature under the working pressure; The inner end of the auxiliary heating steam port (104) is provided with a second steam pipeline (600) extending to the water storage chamber, and the second steam pipeline (600) is used to increase the partial pressure of steam in the steam chamber to promote the escape of gas dissolved in water; The inner end of the high-pressure heater drain port (105) is provided with a high-pressure heater drain pipeline (700) extending to the water storage chamber, and the high-pressure heater drain pipeline (700) is used to promote the separation of water and gas in the water storage chamber.

2. The water deaerator according to claim 1, characterized in that The ejector (200) comprises a water chamber (210), the upper end of the water chamber (210) being in communication with the water inlet (101), the lower end of the water chamber (210) being stacked with a plurality of water outlet rings (220) and an end plate (230) in sequence, the end plate (230) being fixedly connected to the water chamber (210) by bolts (240), the end plate (230) sealing the lower end of the water chamber (210), a plurality of water spray holes (221) being circumferentially distributed on each of the water outlet rings (220), a filter screen (250) being arranged between the water chamber (210) and each of the water spray holes (221), the filter screen (250) being fixed by the bolts (240), and a nozzle (260) being in communication with one or more of the water spray holes (221) being arranged on the outer surface of the water outlet ring (220).

3. The water deaerator according to claim 2, characterized in that The nozzle (260) comprises a plurality of pairs of annular sheets, each pair of the annular sheets comprises two elastic fins (261) abutting against each other, a closed cavity (262) connected to all the water spray holes (221) of one water outlet ring (220) is formed between the two elastic fins (261), and when the pressure in the closed cavity (262) reaches a set value, the two elastic fins (261) are separated.

4. The water deaerator according to claim 3, characterized in that: The water chamber (210), the water outlet ring (220) and the end plate (230) are respectively provided with stepped surfaces (270) that are locked with each other, and the elastic fin (261) is sandwiched between the stepped surface (270) of the water chamber (210) and the stepped surface (270) of the water outlet ring (220), between the stepped surfaces (270) of two adjacent water outlet rings (220), or between the stepped surface (270) of the water outlet ring (220) and the stepped surface (270) of the end plate (230).

5. The water deaerator according to claim 3, characterized in that: A plurality of bite portions (263) are radially arranged on the elastic fin (261), and the bite portions (263) divide the closed cavity (262) into a plurality of cavities.

6. The water deaerator according to claim 1, characterized in that: The exhaust pipeline (400) comprises an exhaust main pipe (410), an exhaust branch pipe (420) and an exhaust valve (430); the exhaust main pipe (410) is arranged obliquely, and the high end of the exhaust main pipe (410) is an exhaust end; a drain pipe (440) is provided at the low end of the exhaust main pipe (410); an air inlet end of the exhaust valve (430) is communicated with the exhaust port (102); an air outlet end of the exhaust valve (430) is communicated with the lower end of the exhaust branch pipe (420); a throttling orifice plate (450) is provided between the exhaust valve (430) and the exhaust branch pipe (420); the upper end of the exhaust branch pipe (420) extends into the middle of the exhaust main pipe (410), and the upper end face of the exhaust branch pipe (420) is an inclined surface (421) opposite to the inclination direction of the exhaust main pipe (410).

7. The water deaerator according to claim 1, characterized in that The first steam pipeline (500) comprises a first vertical pipe (510), the upper end of the first vertical pipe (510) is connected to the heating steam inlet (103), the lower end of the first vertical pipe (510) extends to near the bottom of the deaerator (100) and is provided with a first transverse pipe (520), the first transverse pipe (520) is arranged and fixed along the bottom of the deaerator (100) through a first bracket (530), and a plurality of first open hole pipes (540) are provided on the first transverse pipe (520) along its axial direction.

8. The water deaerator according to claim 1, characterized in that The second steam pipeline (600) includes a second vertical pipe (610) connected to the auxiliary heating steam port (104), and a second transverse pipe (620) is arranged on the second vertical pipe (610). The second transverse pipe (620) is arranged and fixed along the top of the deaerator (100) through a second bracket (630). A plurality of second perforated pipes (640) are arranged on the second transverse pipe (620) along its axial direction, and the lower end of the second perforated pipe (640) extends to near the bottom of the deaerator (100).

9. The water deaerator according to claim 1, characterized in that: The high pressure heater drain pipe (700) comprises a third vertical pipe (710) connected to the high pressure heater drain port (105); the lower end of the third vertical pipe (710) extends to near the bottom of the deaerator tank (100) and extends a third transverse pipe (720) along the bottom of the deaerator tank (100); the third transverse pipe (720) is fixed to the deaerator tank (100) via a third bracket (730); and a plurality of perforations (721) are evenly arranged on the upper half of the pipe wall of the third transverse pipe (720).

10. The water deaerator according to claim 1, characterized in that The deaerator (100) is a horizontal tank. Both ends of the deaerator (100) are provided with end caps, each of which is provided with a manhole (108). The top of the deaerator (100) is also provided with two steam balance ports (109). The two steam balance ports (109) are respectively connected to the heating steam inlet (103) and the auxiliary heating steam port (104) through a balance valve (110). The bottom of the deaerator (100) is also provided with a water discharge port (111) and a water balance port (112).

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