Hollow blade gas-water separator

Abstract

This invention relates to the field of steam dehumidification technology, and more particularly to a hollow blade steam-water separator. The hollow blade steam-water separator of this invention includes a steam-water separation body and a water collection device. The steam-water separation body has an interconnected steam inlet and a steam outlet, with the axis of the steam inlet forming an angle with the axis of the steam outlet. A blade grid is provided between the steam inlet and the steam outlet, and the blade grid includes multiple hollow blades arranged parallel to each other along a center line located between the axes of the steam inlet and the steam outlet. The hollow blades have an upper surface facing the steam inlet and the steam outlet and a lower surface away from the steam inlet and the steam outlet. Multiple small holes are formed on the upper surface of the hollow blades, connecting the inner and outer walls of the hollow blades. The hollow blades are connected to the water collection device. Using the hollow blade steam-water separator of this invention for steam dehumidification, droplets are less likely to be carried away again during the entire steam-water separation process, resulting in high steam-water separation efficiency.

Description

Technical Field

[0001] This invention relates to the field of steam dehumidification technology, and more particularly to a hollow blade steam-water separator. Background Technology

[0002] Steam turbines are one of the key power equipment in power plant construction. Steam generated by the boiler is converted into mechanical energy by the turbine, which then powers the turbine rotor output shaft. Wet steam is a common medium in the turbine, but excessively high humidity can severely corrode turbine blades and adversely affect downstream pipelines and equipment. Therefore, dehumidification of the steam in the entire power plant's steam circulation system is necessary. Conventional waste-to-energy generator sets have low inlet steam parameters due to boiler corrosion. The B6-1.3 / 0.6 / 191.7 model manufactured by Shanghai Turbine Works is a low-temperature, low-pressure, single-shaft, single-cylinder, co-current, reaction, back-pressure, upward-exhaust back-pressure generator set. Given the relatively low superheat of the steam entering the turbine, a hollow-blade steam-water separator must be installed on the exhaust pipe to improve the dryness of the exhaust steam.

[0003] Existing hollow blade steam-water separators generally employ separation methods such as baffles and corrugated plate separation discs. These methods, which utilize obstruction or centrifugal force to remove moisture from steam, are prone to problems such as secondary carryover of droplets during the separation process and significant steam pressure loss. Patent application CN 112755658 A discloses a steam-water separation device for saturated steam dehumidification, which uses corrugated plate separation discs for steam-water separation. This device has a relatively complex structure, high cost, and significant pressure loss. Patent CN 209782591 U discloses a novel steam-water separation device that uses a wire mesh and perforated plate for steam-water separation. With steam entering from the bottom and exiting from the top, droplets are easily carried back during the separation process, resulting in lower separation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hollow blade grid steam-water separator with high steam-water separation efficiency, so as to overcome the above-mentioned defects of the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention provides a hollow blade steam-water separator, comprising a steam-water separation body and a water collection device. The steam-water separation body is provided with a steam inlet and a steam outlet that are interconnected. The axis of the steam inlet forms an angle with the axis of the steam outlet. A blade grid is provided between the steam inlet and the steam outlet. The blade grid includes a plurality of hollow blades arranged parallel to each other along a center line. The center line is located between the axis of the steam inlet and the axis of the steam outlet. The hollow blades have an upper surface facing the steam inlet and the steam outlet and a lower surface away from the steam inlet and the steam outlet. A plurality of first small holes communicating with the inner and outer walls of the hollow blades are opened on the upper surface of the hollow blades. The hollow blades are connected to the water collection device.

[0007] Preferably, the hollow blade has openings at both ends, and the hollow blade is connected to the water collection device through the openings at both ends.

[0008] Preferably, the lower surface of the hollow blade has multiple second small holes on the side near the steam inlet that connect the inner and outer walls of the hollow blade.

[0009] Preferably, the steam-water separator body is a hollow cylindrical structure, with the steam inlet and steam outlet respectively located on the steam-water separator body.

[0010] Preferably, the bends in the steam-water separator body are provided with guide plates to guide the flow of wet steam.

[0011] Preferably, the blade cascade is a flow guide cascade, and the cross-sectional shape of the hollow blade is crescent-shaped.

[0012] Preferably, a horn-shaped diffuser is connected to the steam outlet, with the smaller diameter side of the diffuser connected to the steam outlet.

[0013] Preferably, the water collection device includes a hollow cavity, in which the steam-water separator is housed. The cavity has an inlet and an outlet opening at positions opposite to the inlet and outlet openings, respectively. The cavity is provided with a partition component that separates the inlet side and outlet side of the steam-water separator. An inlet pipe connected to the inlet is inserted through the inlet opening. A drain pipe is installed at the bottom of the cavity near the inlet side of the steam-water separator.

[0014] Preferably, the separating component includes a partition plate, on which a connecting hole is provided that matches the outer contour of the steam outlet side of the steam-water separator body, and the steam outlet is provided to pass through the connecting hole.

[0015] Preferably, the top of the cavity is provided with a vent.

[0016] Compared with the prior art, the present invention has significant progress:

[0017] In the steam-water separator of the present invention, when dehumidifying steam, wet steam enters the steam-water separator body through the steam inlet. When flowing through the blade grid, the flow velocity on the lower surface of the upper hollow blade is higher than the flow velocity on the upper surface of the lower hollow blade. The water in the wet steam is thrown onto the upper surface of the lower hollow blade. When the thrown water collects into water droplets, it enters the interior of the hollow blade through the first small hole on the hollow blade. The water droplets inside the hollow blade collect into a water flow and flow out from the interior of the hollow blade into the water collection device. During the entire steam-water separation process, the droplets are not easily carried away again, resulting in high steam-water separation efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the hollow blade grid steam-water separator in an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional structural schematic diagram of the hollow blade grid steam-water separator in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the front view structure of the hollow blade in an embodiment of the present invention.

[0021] Figure 4 yes Figure 3 A schematic diagram of the P-direction structure of the hollow blade.

[0022] The reference numerals in the attached figures are explained as follows:

[0023] 1. Gas-water separator body c. First small hole

[0024] 2. Blade cascade d, second small hole

[0025] 2.1 Hollow blade e. Upper surface

[0026] 3. Deflector plate f, lower surface

[0027] 4. Diffuser g, Steam inlet opening

[0028] 5. Cavity h, steam outlet

[0029] 6. Steam inlet pipe i. Connection hole

[0030] 7. Baffle plate j, pressure gauge interface

[0031] 8. Drain pipe k, thermometer interface

[0032] 9. Steam outlet pipe m, vent port

[0033] 10. Support foot n, level gauge interface

[0034] a. Steam inlet A, centerline

[0035] b. Steam outlet Detailed Implementation

[0036] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0037] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] like Figures 1 to 4 The image shows one embodiment of the hollow blade steam-water separator of the present invention. See also... Figures 1 to 3The hollow blade steam-water separator of this embodiment includes a steam-water separation body 1 and a water collection device. The steam-water separation body 1 is provided with a steam inlet a and a steam outlet b that are interconnected. The axis of the steam inlet a forms an angle with the axis of the steam outlet b. A blade grating 2 is provided between the steam inlet a and the steam outlet b. The blade grating 2 includes a plurality of hollow blades 2.1 that are arranged parallel to each other along a center line A. The center line A is located between the axis of the steam inlet a and the axis of the steam outlet b. The hollow blades 2.1 have an upper surface e facing the steam inlet a and the steam outlet b and a lower surface f away from the steam inlet a and the steam outlet b. A plurality of first small holes c that connect the inner and outer walls of the hollow blades 2.1 are opened on the upper surface e of the hollow blades 2.1. The hollow blades 2.1 are connected to the water collection device. In this embodiment, when the hollow blade steam-water separator dehumidifies steam, the wet steam enters the steam-water separator body 1 through the steam inlet a. When flowing through the blade 2, the flow velocity on the lower surface f of the upper hollow blade 2.1 is higher than the flow velocity on the upper surface e of the lower hollow blade 2.1. The water in the wet steam is thrown onto the upper surface e of the lower hollow blade 2.1. When the thrown water collects into droplets, it enters the interior of the hollow blade 2.1 through the first small hole c. The water droplets inside the hollow blade 2.1 collect into a water flow and flow out from the interior of the hollow blade 2.1 into the water collection device. During the entire steam-water separation process, the droplets are not easily carried away again, resulting in high steam-water separation efficiency.

[0041] Better, see Figure 3 and Figure 4 In this embodiment, multiple small holes c that connect the inner and outer walls of the hollow blade 2.1 are uniformly and continuously arranged on the upper surface e of the hollow blade 2.1 so that the separated droplets can enter the interior of the hollow blade 2.1 and avoid secondary carryover of wet vapor.

[0042] Preferably, the hollow blade 2.1 has openings at both ends, and the hollow blade 2.1 is connected to the water collection device through the openings at both ends.

[0043] Preferably, see Figure 3 The lower surface f of the hollow blade 2.1 has multiple small second holes d near the steam inlet a, connecting the inner and outer walls of the hollow blade 2.1. When wet steam enters the blade 2, the flow area of ​​the wet steam decreases, and the flow velocity of the wet steam entering the blade 2 increases. The flow velocity on the lower surface f of the upper hollow blade 2.1 is higher than the flow velocity on the upper surface e of the lower hollow blade 2.1, creating a pressure difference that allows moisture in the steam to enter the interior of the hollow blade 2.1 through the small second holes d, which is beneficial to improving the dehumidification effect of the hollow blade steam-water separator.

[0044] Preferably, in this embodiment, a plurality of second small holes d connecting the inner and outer walls of the hollow blade 2.1 are uniformly and continuously arranged at intervals on the side of the lower surface e of the hollow blade 2.1 near the steam inlet a, so that the separated droplets can enter the interior of the hollow blade 2.1 and improve the dehumidification effect of the hollow blade steam-water separator.

[0045] Preferably, see Figure 2 The steam-water separator body 1 is a hollow cylindrical structure, with steam inlet a and steam outlet b respectively located on the steam-water separator body 1.

[0046] Preferably, in this embodiment, the angle between the centerline A of the vane 2 and the axis of the steam outlet b is 45°.

[0047] Preferably, see Figure 2 The steam-water separator 1 has a guide plate 3 at the bend to guide the flow of wet steam. When the pressure distribution inside the steam-water separator 1 is uneven, a pressure difference will appear on both sides of the guide plate 3. At this time, the guide plate 3 adjusts its own posture under the action of the pressure difference to make the pressure inside the steam-water separator 1 tend to be balanced. This can guide the flow of wet steam and ensure that the wet steam entering the steam-water separator 1 can pass through the blade 2 evenly, thereby improving the steam-water separation effect of wet steam and reducing the pressure loss after the wet steam enters the steam-water separator 1.

[0048] Preferably, see Figure 2 and Figure 3 The blade cascade 2 is a guide blade cascade, and the cross-sectional shape of the hollow blade 2.1 is crescent-shaped to reduce the resistance of wet steam when it flows in the steam-water separation body 1, so that the wet steam has better flow characteristics and thus reduces the pressure loss after the wet steam enters the steam-water separation body 1.

[0049] Better, see Figure 3 In this embodiment, both the upper surface e and the lower surface f are arc-shaped surfaces.

[0050] Preferably, see Figure 2 A trumpet-shaped diffuser 4 is connected to the steam outlet b, with the smaller diameter side of the diffuser 4 connected to the steam outlet b. The steam separated by the steam-water separator 1 is evenly diffused within the diffuser 4 before being discharged, which helps to avoid local eddies and reduce the pressure loss of the separated steam.

[0051] Preferably, see Figure 2The water collection device includes a hollow cavity 5, in which the steam-water separator 1 is housed. The cavity 5 has a steam inlet opening g and a steam outlet opening h at positions opposite to the steam inlet a and steam outlet b, respectively. The cavity 5 is provided with a partition component that separates the steam inlet a side and the steam outlet b side of the steam-water separator 1. A steam inlet pipe 6 connected to the steam inlet a is inserted through the steam inlet opening g. A drain pipe 8 is installed at the bottom of the cavity 5 near the steam inlet a side of the steam-water separator 1. Wet steam enters the steam-water separator 1 through the steam inlet pipe 6. After flowing through the blade grid 2, the water in the wet steam is separated. The separated water forms droplets and enters the interior of the hollow blade 2.1 through the first small hole c and the second small hole d. When the water droplets inside the hollow blade 2.1 form a water flow, they flow out along the openings at both ends of the hollow blade 2.1 and enter the water collection device cavity 5 near the steam inlet a side of the steam-water separator 1, and are discharged through the drain pipe 8. Meanwhile, the separated steam diffuses through the diffuser pipe 4 and flows into the water collection device cavity 5 near the steam outlet b side of the steam-water separator 1, and is discharged from the steam outlet h. The separator separates the steam inlet a side and the steam outlet b side of the steam-water separator 1, preventing the separated steam from coming into secondary contact with the separated water during the process of flowing from the steam outlet b to the steam outlet h, further improving the steam-water separation effect.

[0052] It should be noted that the steam-water separator 1 can also be installed independently of the water collection device. In this case, the water collection device is connected to the hollow blades 2.1 on the blade grid 2 in the steam-water separator 1 via a pipe. Preferably, see [link to other specifications]. Figure 2 In this embodiment, a steam outlet pipe 9 is connected to the steam outlet opening h.

[0053] Specifically, see Figure 1 In this embodiment, both the steam inlet pipe 6 and the steam outlet pipe 9 are equipped with a pressure gauge interface j and a thermometer interface k. The pressure gauge interface j is used to connect a pressure gauge, and the thermometer interface k is used to connect a thermometer. The pressure in the steam inlet pipe 6 and the steam outlet pipe 9 are monitored by the pressure gauge, and the temperature in the steam inlet pipe 6 and the steam outlet pipe 9 is monitored by the thermometer.

[0054] Further, see Figure 1 and Figure 2 In this embodiment, the bottom of the cavity 5 is equipped with a support leg 10 for supporting the cavity 5.

[0055] Preferably, see Figure 2 The separation component includes a partition plate 7, on which a connection hole i is provided that matches the outer contour of the steam outlet b side of the steam-water separator body 1, and the steam outlet b is provided through the connection hole i.

[0056] Preferably, see Figure 1 and Figure 2The top of the cavity 5 is provided with a vent port m. During the water pressure test of the hollow blade steam-water separator, air is released through the vent port m at the top of the cavity 5.

[0057] Better, see Figure 1 A level gauge interface n is provided on the side of the cavity 5. The level gauge interface n is connected to an external level gauge to monitor the liquid level inside the cavity 5 and prevent the liquid level from becoming too high.

[0058] Further, see Figure 1 In this embodiment, two level gauge interfaces n are arranged vertically on the side of the cavity 5. Both level gauge interfaces n can be connected to external level gauges to monitor the liquid level inside the cavity 5, which is beneficial for better understanding the liquid level position inside the cavity 5. It should be noted that the number of level gauge interfaces n is not specified.

[0059] The hollow blade grid steam-water separator in this embodiment has a relatively simple structure and does not require corrugated plate separation plates, which helps to reduce production costs.

[0060] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A hollow blade gas-water separator, characterized in that, The device includes a steam-water separator (1) and a water collection device. The steam-water separator (1) has a steam inlet (a) and a steam outlet (b) that are interconnected. The axis of the steam inlet (a) forms an angle with the axis of the steam outlet (b). A blade cascade (2) is provided between the steam inlet (a) and the steam outlet (b). The blade cascade (2) includes a plurality of hollow blades (2.1) arranged parallel to each other along a center line (A). The center line (A) is located between the axis of the steam inlet (a) and the axis of the steam outlet (b). The hollow blades (2.1) have an upper surface (e) facing the steam inlet (a) and the steam outlet (b) and a surface away from the steam inlet (a) and the steam outlet (b). The lower surface (f) of the hollow blade (2.1) is provided with a plurality of first small holes (c) on the upper surface (e) of the hollow blade (2.1) that connect the inner and outer walls of the hollow blade (2.1), and the hollow blade (2.1) is connected to the water collection device; the lower surface (f) of the hollow blade (2.1) is provided with a plurality of second small holes (d) on the side near the steam inlet (a) that connect the inner and outer walls of the hollow blade (2.1); the steam-water separation body (1) is a hollow cylindrical structure, and the steam inlet (a) and the steam outlet (b) are respectively provided on the steam-water separation body (1); the bends in the steam-water separation body (1) are provided with guide plates (3) for guiding the flow of wet steam.

2. The hollow blade steam-water separator according to claim 1, characterized in that, The hollow blade (2.1) has openings at both ends, and the hollow blade (2.1) is connected to the water collection device through the openings at both ends.

3. The hollow blade steam-water separator according to claim 1, characterized in that, The blade cascade (2) is a flow guide cascade, and the hollow blade (2.1) has a crescent-shaped cross-section.

4. The hollow blade steam-water separator according to claim 1, characterized in that, A horn-shaped diffuser (4) is connected to the steam outlet (b), and the small-diameter side of the diffuser (4) is connected to the steam outlet (b).

5. The hollow blade steam-water separator according to claim 1, characterized in that, The water collection device includes a hollow cavity (5), and the steam-water separator (1) is housed in the cavity (5). The cavity (5) has a steam inlet opening (g) and a steam outlet opening (h) at positions opposite to the steam inlet (a) and the steam outlet (b), respectively. The cavity (5) is provided with a partition component that separates the steam inlet (a) side and the steam outlet (b) side of the steam-water separator (1). The steam inlet opening (g) is provided with a steam inlet pipe (6) connected to the steam inlet (a). A drain pipe (8) is installed at the bottom of the cavity (5) near the steam inlet (a) side of the steam-water separator (1).

6. The hollow blade steam-water separator according to claim 5, characterized in that, The separation component includes a partition (7), on which a connection hole (i) is provided that matches the outer contour of the steam outlet (b) side of the steam-water separator body (1), and the steam outlet (b) extends through the connection hole (i).

7. The hollow blade steam-water separator according to claim 5, characterized in that, The top of the cavity (5) is provided with an air vent (m).

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