A surface modified compressor cooling and humidification guide vane stage

Abstract

The present application relates to a kind of surface modified compressor cooling humidification guide vane stage, including blade, porous metal coating and annular vane stage liquid distribution ring, the blade is provided with cavity and liquid distribution hole inside, the cavity is connected with heating water source by liquid distribution hole outside blade, the blade is fixed on the vane stage liquid distribution ring, the cavity and porous metal coating constitute guide humidification structure, the number of guide humidification structure is multiple.Compared with prior art, the present application has the advantages of guiding pressure recovery and humidification to air simultaneously, humidification structure occupies small space and high humidification efficiency.

Description

Technical Field

[0001] This invention relates to the field of high-pressure air humidification technology, and in particular to a surface-modified guide vane stage for compressor cooling and humidification. Background Technology

[0002] Guide vanes are components that regulate the direction of airflow at the compressor outlet and generally do not affect compressor efficiency or working fluid properties. Based on the theory of the Humid Air Turbine Cycle (HAT cycle), humidifying the working fluid at the compressor outlet can effectively improve cycle efficiency, reduce the working fluid temperature at the turbine inlet, and thus reduce the requirements for turbine blade materials and cooling. Traditional guide vanes are only responsible for regulating airflow direction and are not designed for other purposes. In humid air turbine cycles, packed tower saturators are commonly used. These saturators are large in size, with high volumetric and thermal inertia, significantly reducing the cycle's adjustment flexibility.

[0003] Porous metallic materials are a novel type of metallic material with numerous pores distributed within a metallic framework. Their pore sizes can range from millimeters to micrometers or even nanometers, and their microstructures offer excellent designability, allowing for optimization of the microstructure before fabrication to meet specific needs. Compared to ordinary metallic materials, the physical properties of porous metallic materials are primarily reflected in their lightweight and ease of processing, while their functional properties include sound absorption, electromagnetic shielding, shock absorption, and carrier properties. Furthermore, due to their high thermal conductivity, large specific surface area, and strong capillary force, porous metallic materials have attracted widespread attention and research in the field of heat and mass transfer.

[0004] Mobile thermal circulation equipment places high demands on its flexibility, adjustability, volumetric inertia, and thermal inertia. Based on a simple circulation system, the goal is to achieve multiple functions, such as interstage cooling, waste heat recovery, and working fluid humidification, while maintaining a compact and small footprint, and maximizing circulation efficiency without significantly increasing volume. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as guide vanes only changing the airflow direction and the large volumetric and thermal inertia of packed tower saturators used in humid air turbine circulation. This invention provides a surface-modified compressor cooling and humidification guide vane stage that can achieve humidification of the working fluid within a very small footprint, thus solving the aforementioned problems.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A surface-modified compressor cooling and humidification guide vane stage includes a blade, a porous metal coating, and an annular blade stage liquid distribution ring. The blade has a cavity and liquid distribution holes inside. The cavity is connected to the outside of the blade through the liquid distribution holes. The porous metal coating is fixed to the outside of the blade. The blade is fixed to the blade stage liquid distribution ring. The cavity is connected to a heating water source. The blade and the porous metal coating constitute a guide humidification structure. There are multiple guide humidification structures.

[0008] Preferably, the cavity includes a closed section and an open end. The end of the blade with the open end is fixed on the blade-stage liquid distribution ring. The open end of the cavity is connected to a heating water source. The blades are evenly distributed inside the blade-stage liquid distribution ring to organize the outlet gas of the compressor and regulate the flow direction of the outlet gas.

[0009] Preferably, there are multiple liquid distribution holes, which are evenly distributed on both sides of the cavity. One end of each liquid distribution hole is connected to the cavity, and the other end is connected to the porous metal coating.

[0010] Preferably, the liquid distribution hole is a cylindrical hole.

[0011] Preferably, the density of the liquid distribution holes on the blade is 1-4 per square centimeter.

[0012] Preferably, the diameter of the liquid distribution hole is in the range of 1-3 mm.

[0013] Preferably, the shape of the porous metal coating matches the outer contour of the blade, and the porous metal coating is fixed to the outer side of the blade.

[0014] Preferably, the thickness range of the porous metal coating is:

[0015] 0.5H≤h1≤H

[0016] Where h1 represents the thickness of the porous metal coating and H represents the wall thickness of the blade.

[0017] Preferably, the porosity of the porous metal coating is 30-60%.

[0018] Preferably, both the blades and the porous metal coating are made of corrosion-resistant metal.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) In this scheme, high-temperature water from the heating water source is introduced into the cavity of the blade and permeates to the blade surface through the liquid distribution holes. Under the capillary action of the porous metal coating on the outer side of the blade, the water is evenly distributed in the porous metal coating. When the working fluid at the compressor outlet flows over the blade surface, the water is heated and evaporates, humidifying the air at the compressor outlet. The hydrophilic modification treatment on the outer surface of the traditional guide vane adds the function of humidifying the working fluid to the guide vane, solving the defects of large volumetric inertia and thermal inertia caused by the large volume of the packed tower saturator in the traditional humid air turbine cycle, resulting in poor cycle adjustment flexibility. It increases the mass flow rate and specific heat of the circulating working fluid and improves the overall cycle efficiency.

[0021] (2) This solution humidifies the porous metal coating on both sides of the blade by uniformly setting multiple liquid distribution holes on both sides of the blade, so that the air flowing through both sides of the blade can be humidified, thereby improving the air humidification efficiency and humidification effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the gas-guided humidification device provided by the present invention;

[0023] Figure 2 A schematic diagram of the blade structure provided by the present invention;

[0024] Figure 3 A cross-sectional view of the blade provided for this invention;

[0025] In the figure: 1. Blade, 2. Porous metal coating, 3. Blade-level liquid distribution ring, 4. Guided humidification structure, 11. Cavity, 12. Liquid distribution hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and 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 this invention.

[0030] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment provides a surface-modified compressor cooling and humidification guide vane stage, including a vane 1, a porous metal coating 2, and a vane stage liquid distribution ring 3. The vane 1 has a cavity 11 and a liquid distribution hole 12 inside. The cavity 11 is connected to the outside of the vane 1 through the liquid distribution hole 12. The porous metal coating 2 is fixed to the outside of the vane 1. The vane 1 is fixed on the vane stage liquid distribution ring 3. The cavity 11 is connected to a heating water source. The vane 1 and the porous metal coating 2 constitute a guide humidification structure 4. There are multiple guide humidification structures 4.

[0034] Working principle: High-temperature water from the heating water source is introduced into the cavity 11 of the blade 1 and permeates to the surface of the blade 1 through the liquid distribution hole 12. Under the capillary action of the porous metal coating 2 on the outer side of the blade 1, the water is evenly distributed in the porous metal coating 2. When the working fluid at the compressor outlet flows through the surface of the blade 1, the water is heated and evaporated, thus humidifying the air at the compressor outlet.

[0035] In this scheme, high-temperature water from a heating source is introduced into the cavity 11 of blade 1 and permeates to the surface of blade 1 through the liquid distribution holes 12. Under the capillary action of the porous metal coating 2 on the outer side of blade 1, the water is evenly distributed in the porous metal coating 2. When the working fluid at the compressor outlet flows over the surface of blade 1, the water is heated and evaporates, humidifying the air at the compressor outlet. Hydrophilic modification treatment is applied to the outer surface of the traditional guide vane, adding the function of humidifying the working fluid to the guide vane. This solves the defects of large volumetric and thermal inertia caused by the large volume of the packed tower saturator in traditional humid air turbine circulation, resulting in poor circulation adjustment flexibility. It increases the mass flow rate and specific heat of the circulating working fluid, improving the overall circulation efficiency.

[0036] As a preferred embodiment, such as Figure 2 and Figure 3 As shown, the cavity 11 includes a closed section and an open end. One end of the blade 1 with the open end is fixed to the blade stage liquid distribution ring 3. The open end of the cavity 11 is connected to a heating water source. The blades 1 are evenly distributed inside the blade stage liquid distribution ring 3, used to organize the outlet gas of the compressor and regulate the flow direction of the outlet gas. There are multiple liquid distribution holes 12, which are evenly distributed on both sides of the cavity 11. One end of the liquid distribution hole 12 is connected to the cavity 11, and the other end is connected to the porous metal coating 2.

[0037] By evenly distributing multiple liquid distribution holes on both sides of the blade, the porous metal coating on both sides of the blade is humidified, so that the air flowing through both sides of the blade can be humidified, thereby improving the air humidification efficiency and humidification effect.

[0038] Specifically, the liquid distribution holes 12 are cylindrical holes. The density of liquid distribution holes 12 on the blade 1 is 1-4 per square centimeter. The diameter of the liquid distribution holes 12 ranges from 1 to 3 mm.

[0039] The porous metal coating 2 is shaped to match the outer contour of the blade 1, and is fixed to the outer side of the blade 1. The porosity of the porous metal coating 2 is 30-60%.

[0040] The thickness range of the porous metal coating 2 is:

[0041] 0.5H≤h1≤H

[0042] Where h1 represents the thickness of the porous metal coating 2, and H represents the wall thickness of the blade 1.

[0043] Specifically, both blade 1 and porous metal coating 2 are made of corrosion-resistant metal. Since blade 1 and porous metal coating 2 are in long-term contact with high-temperature, high-pressure water, using metals with excellent corrosion resistance extends their service life, reduces the frequency of later maintenance and replacement, and lowers costs.

[0044] Based on the above, this embodiment provides a more specific implementation method, such as... Figure 1 As shown, a compressor outlet guide vane with a hydrophilic surface modification includes a blade 1 disposed at the compressor outlet and a porous metal coating 2.

[0045] like Figure 2 As shown, the compressor outlet guide blade 1 is a hollow stainless steel arc-shaped structure with an axial chord length l = 100 mm, a blade height h = 50 mm, and a water outlet diameter d = 1 mm. The surface hydrophilic layer 2 is a porous copper tube with a porosity of 30% and a wall thickness d1 = 2 mm, covering the compressor outlet guide blade 1.

[0046] Among them, the porous metal coating 2 is fitted onto the outside of the outlet guide vane 1, and is fixed by welding after the fitting is completed.

[0047] During operation, water flows through the hollow guide vanes and permeates onto the vane surface through the water outlet holes. Under the capillary action of the hydrophilic layer, it is evenly distributed on the surface of the hydrophilic layer. When the working fluid air at the compressor outlet flows over the vane surface, the water is heated and evaporates, humidifying the air at the compressor outlet. After the air completes the humidification process, it flows out.

[0048] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A surface-modified compressor cooling and humidification guide vane stage, characterized in that, The device includes a blade (1), a porous metal coating (2), and a blade-level liquid distribution ring (3). The blade (1) has a cavity (11) and a liquid distribution hole (12) inside. The cavity (11) is connected to the outside of the blade (1) through the liquid distribution hole (12). The porous metal coating (2) is fixed to the outside of the blade (1). The blade (1) is fixed on the blade-level liquid distribution ring (3). The cavity (11) is connected to a heating water source. The blade (1) and the porous metal coating (2) constitute a guide humidification structure (4). There are multiple guide humidification structures (4).

2. The surface-modified compressor cooling and humidification guide vane stage according to claim 1, characterized in that, The cavity (11) includes a closed section and an open end. One end of the blade (1) with the open end is fixed on the blade-stage liquid distribution ring (3). The open end of the cavity (11) is connected to a heating water source. The blade (1) is evenly distributed inside the blade-stage liquid distribution ring (3) to organize the outlet gas of the compressor and regulate the flow direction of the outlet gas.

3. The surface-modified compressor cooling and humidification guide vane stage according to claim 1, characterized in that, The number of liquid distribution holes (12) is multiple, and the liquid distribution holes (12) are evenly distributed on both sides of the cavity (11). One end of the liquid distribution hole (12) is connected to the cavity (11), and the other end is connected to the porous metal coating (2).

4. The surface-modified compressor cooling and humidification guide vane stage according to claim 3, characterized in that, The liquid distribution hole (12) is a cylindrical hole.

5. A surface-modified compressor cooling and humidification guide vane stage according to claim 3, characterized in that, The density of the liquid distribution holes (12) on the blade (1) is 1-4 per square centimeter.

6. The surface-modified compressor cooling and humidification guide vane stage according to claim 3, characterized in that, The diameter of the liquid distribution hole (12) ranges from 1 to 3 mm.

7. The surface-modified compressor cooling and humidification guide vane stage according to claim 1, characterized in that, The shape of the porous metal coating (2) matches the outer contour of the blade (1), and the porous metal coating (2) is fixed to the outside of the blade (1).

8. A surface-modified compressor cooling and humidification guide vane stage according to claim 7, characterized in that, The thickness range of the porous metal coating (2) is: 0.5H≤h1≤H Where h1 represents the thickness of the porous metal coating (2) and H represents the wall thickness of the blade (1).

9. A surface-modified compressor cooling and humidification guide vane stage according to claim 7, characterized in that, The porosity of the porous metal coating (2) is 30-60%.

10. A surface-modified compressor cooling and humidification guide vane stage according to claim 1, characterized in that, Both the blade (1) and the porous metal coating (2) are made of rust-resistant metal.

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