Air inlet structure for air purification of gas turbine

Abstract

The invention relates to the technical field of gas turbine air purification, in particular to an air inlet structure for gas turbine air purification, which comprises an air inlet cylinder, an air filter cavity, a baffling cavity and a spiral cavity are arranged on the air inlet cylinder, a porous spiral ceramic plate is mounted in the spiral cavity, and a filter membrane component is mounted in the air filter cavity. The designed spiral cavity can greatly prolong the air filtering stroke, the porous spiral ceramic plate filled in the spiral cavity can fully filter air at the moment, particles are efficiently captured through inertial collision and interception, meanwhile, ceramic is resistant to high temperature and suitable for the high-temperature working condition of a gas turbine, and compared with a traditional metal wire mesh, the filtering effect is better. The dust holding capacity of the porous spiral ceramic plate is higher, the hollow fiber membrane is designed to more effectively capture particles such as dust, when air flows along the inclined part of the hollow fiber membrane, the vertical part of the hollow fiber membrane can relieve the impact on the inclined part of the hollow fiber membrane when the air is raised, and the deformation degree of the hollow fiber membrane is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbine air purification, in particular to an air intake structure for gas turbine air purification. Background Art

[0002] As a highly efficient power device, gas turbines are widely used in power generation, aviation, shipbuilding and other fields. Their performance and life are highly dependent on the cleanliness of the intake air. Particulate matter in the air (such as dust, salt, industrial pollutants, etc.) will enter the gas turbine with the airflow, causing wear, corrosion and fouling of the compressor and turbine blades, thereby reducing unit efficiency, increasing maintenance costs, and even causing malfunctions and shutdowns. Therefore, the intake purification structure of the gas turbine is a key system to ensure efficient air filtration, reduce pressure loss, and protect core components.

[0003] Traditional gas turbine inlet air purification systems typically utilize multi-stage filtration technology, including inertial separators, fiber filters, and electrostatic precipitators. Inertial separators separate large particles by shifting the airflow direction, fiber filters capture fine particles through interception and diffusion, and electrostatic precipitators attract charged particles using electric field forces. However, fiber filters in traditional technologies have limited dust holding capacity and are prone to clogging after prolonged operation, requiring frequent replacement and increasing maintenance costs. Summary of the Invention

[0004] The object of the present invention is to provide an air intake structure for gas turbine air purification to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an air intake structure for gas turbine air purification, comprising an air intake cylinder, the air intake cylinder being provided with a coaxially arranged air filter chamber, a baffle chamber, and a spiral chamber distributed from the inside to the outside, the air filter chamber passing through the top of the air intake cylinder, and the cavity opening of the air filter chamber near the bottom being communicated with the baffle chamber, an internally threaded cavity communicating with the spiral cavity being provided on the air intake cylinder at the bottom of the spiral cavity, and the internally threaded cavity passing through the bottom of the air intake cylinder, and a plurality of filter holes distributed annularly and communicating with the baffle chamber being provided on the cavity wall near the bottom of the spiral cavity;

[0006] A porous spiral ceramic plate for filtering air is installed in the spiral cavity, and a filter membrane component for secondary filtering of air is installed in the air filter cavity;

[0007] The filter membrane component includes a sleeve tube, on which a plurality of hollow fiber membranes in annular triangular structures are sleeved, and the adjacent hollow fiber membranes in annular triangular structures are fixedly connected, and the membrane wall of the hollow fiber membrane close to the sleeve tube is fixedly embedded in the sleeve tube.

[0008] Preferably, a coaxially arranged threaded column is fixedly installed on the inner bottom wall of the air filter chamber, and a sealing top cover for sealing the top opening of the air filter chamber is installed on the threaded column, and an annular threaded bottom cover for threaded connection and sealing the internal threaded chamber is installed on the internal threaded cavity.

[0009] Preferably, a coaxially arranged mounting post is fixedly mounted on the inner disk wall of the sealing top cover, and a threaded groove is provided at the bottom of the mounting post, and the mounting post is threadedly fixedly connected to the threaded post through the threaded groove.

[0010] Preferably, the sleeve is mounted on the mounting post, and the outer edge of the hollow fiber membrane in the annular triangular structure abuts against the inner wall of the air filter chamber.

[0011] Preferably, abutments are installed on the mounting posts on the upper and lower sides of the sleeve tube, and the abutments include springs, and abutment rings are fixedly installed on both ends of the spring, and the spring and the abutment ring are both sleeved on the mounting posts;

[0012] The two abutment rings of the abutment member located above the sleeve tube respectively abut against the sealing top cover and the upper tube opening of the sleeve tube;

[0013] The two abutment rings of the abutment piece located below the sleeve pipe respectively abut against the bottom wall of the air filter chamber and the lower pipe opening of the sleeve pipe.

[0014] Preferably, a plurality of exhaust interfaces for exhausting the air filter chamber are fixedly mounted on the sealing top cover, and a plurality of air inlet pipes communicating with the spiral chamber are fixedly mounted on the top of the air inlet cylinder.

[0015] Preferably, a deflection ring is fixedly installed on the bottom wall of the deflection chamber, and the deflection chamber is divided into two symmetrical flow channels by the deflection ring, and the tops of the two flow channels are interconnected and fixedly installed with sound-absorbing cotton.

[0016] Preferably, an annular arc groove is formed on the outer annular wall of the sealing top cover, and an annular air pipe which is interference-fitted with the annular arc groove is fixedly embedded on the inner annular wall at the opening of the air filter chamber.

[0017] Preferably, a magnetic ring A is fixedly installed on the top of the air inlet tube, and a magnetic ring B with opposite magnetic properties to the magnetic ring A is fixedly installed on the inner cover surface of the sealing top cover, and when the sealing top cover is closed on the opening of the air filter chamber, the magnetic ring B and the magnetic ring A are adsorbed against each other.

[0018] Preferably, the lower cover surface of the annular threaded bottom cover is provided with a plurality of annularly distributed hand-holding grooves.

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

[0020] 1. The spiral cavity designed in the present invention can greatly extend the air filtration stroke. At this time, the porous spiral ceramic plate filled in the spiral cavity can fully filter the air and efficiently capture particles through inertial collision and interception. At the same time, the high temperature resistance of ceramics is suitable for high temperature working conditions of gas turbines. Compared with traditional metal wire mesh, the porous spiral ceramic plate has a higher dust holding capacity;

[0021] 2. The hollow fiber membrane of the present invention adopts a ring-shaped triangular structure design, which greatly improves the air travel in the air filter chamber, so that the hollow fiber membrane can more effectively capture dust and other particulate matter. When the air flows along the inclined part of the hollow fiber membrane, the vertical part of the hollow fiber membrane can alleviate the impact of the upward air on the inclined part of the hollow fiber membrane, reduce the degree of deformation of the hollow fiber membrane, and improve the service life of the hollow fiber membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a preferred embodiment of an air intake structure for gas turbine air purification provided by the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the explosion structure shown;

[0024] Figure 3 for Figure 1 The cross-sectional structural diagram shown;

[0025] Figure 4 for Figure 3 A schematic cross-sectional view of the air inlet duct is shown;

[0026] Figure 5 for Figure 3 A schematic cross-sectional structural diagram of the sealing top cover shown;

[0027] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure of the filter membrane component shown;

[0028] Figure 7 for Figure 2 A schematic structural diagram of the abutment member shown;

[0029] Figure 8 for Figure 2 Schematic diagram of the structure of the annular threaded bottom cover shown.

[0030] In the figure: 1. Air inlet tube; 1a. Air filter chamber; 1b. Baffle chamber; 1c. Spiral chamber; 1c1. Internal thread chamber; 1d. Filter hole; 11. Baffle ring; 12. Threaded column; 13. Sound-absorbing cotton; 2. Annular threaded bottom cover; 2a. Hand-held slot; 3. Sealing top cover; 3a. Annular arc groove; 31. Exhaust interface; 32. Mounting column; 32a. Threaded connection groove; 4. Porous spiral ceramic plate; 5. Filter membrane component; 51. Socket tube; 52. Hollow fiber membrane; 6. Abutment; 61. Spring; 62. Abutment ring; 7. Air inlet pipe; 81. Magnetic ring A; 82. Magnetic ring B; 9. Annular air pipe. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1 to 8 An embodiment of the present invention provides an air intake structure for gas turbine air purification, which includes an air intake tube 1, a porous spiral ceramic plate 4 and a filter membrane component 5.

[0033] In the embodiments of the present invention, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 as well as Figure 8 The air inlet cylinder 1 is provided with a coaxially arranged and distributed air filter chamber 1a, a baffle chamber 1b and a spiral chamber 1c from the inside to the outside. The air filter chamber 1a passes through the top of the air inlet cylinder 1, and the cavity opening of the air filter chamber 1a near the bottom is communicated with the baffle chamber 1b. The air inlet cylinder 1 at the bottom of the spiral chamber 1c is provided with an internal threaded cavity 1c1 communicated with the spiral cavity 1c, and the internal threaded cavity 1c1 passes through the bottom of the air inlet cylinder 1. A plurality of annular filter holes 1d are provided on the cavity wall near the bottom of the spiral cavity 1c and are communicated with the baffle chamber 1b. The inner bottom wall of the air filter chamber 1a is fixedly provided with a coaxial A threaded column 12 is provided, and a sealing top cover 3 for sealing the top opening of the air filter chamber 1a is installed on the threaded column 12, and a plurality of exhaust interfaces 31 for exhausting the air filter chamber 1a are fixedly installed on the sealing top cover 3, and a plurality of air inlet pipes 7 connected with the spiral chamber 1c are fixedly installed on the top of the air inlet cylinder 1, and an annular threaded bottom cover 2 for threaded connection and sealing the internal threaded chamber 1c1 is installed on the internal threaded chamber 1c1, and a porous spiral ceramic plate 4 for filtering air is installed in the spiral chamber 1c, and a filter membrane component 5 for secondary filtration of the air is installed in the air filter chamber 1a.

[0034] It should be noted that: the porous spiral ceramic plate 4 is inserted into the internal thread cavity 1c1, and then the porous spiral ceramic plate 4 is screwed into the spiral cavity 1c until the porous spiral ceramic plate 4 completely fills the spiral cavity 1c, and then the annular threaded bottom cover 2 is covered on the internal thread cavity 1c1 for sealing, and then the filter membrane component 5 is installed and the sealing top cover 3 is closed, and then the air inlet pipe 7 is connected to the exhaust port of the primary filter structure (cyclone separator or inertial separator) of the gas turbine, and the exhaust interface 31 is connected to the air inlet of the high-efficiency filter structure (HEPA / ULPA filter or electrostatic precipitator) of the gas turbine through a conduit, thereby completing the installation of the air inlet cylinder 1;

[0035] The designed spiral cavity 1c can greatly extend the filtration distance of the air. At this time, the porous spiral ceramic plate 4 filled in the spiral cavity 1c can fully filter the air and efficiently capture particles through inertial collision and interception. At the same time, ceramics are resistant to high temperatures (>1000℃) and are suitable for high-temperature working conditions of gas turbines. Compared with traditional metal wire mesh, the porous spiral ceramic plate 4 has a higher dust holding capacity.

[0036] In this solution, when replacing the porous spiral ceramic plate 4, first unscrew the annular threaded bottom cover 2, and then reverse the porous spiral ceramic plate 4 so that the porous spiral ceramic plate 4 is screwed in along the bottom of the spiral cavity 1c until the porous spiral ceramic plate 4 is completely slipped off. Therefore, a new porous spiral ceramic plate 4 can be quickly replaced, and the operation is simple and convenient.

[0037] Furthermore, a coaxially arranged mounting post 32 is fixedly installed on the inner disk wall of the sealing top cover 3, and a threaded groove 32a is provided at the bottom of the mounting post 32. The mounting post 32 is threadedly fixedly connected to the threaded post 12 through the threaded groove 32a. The mounting post 32 at the bottom of the sealing top cover 3 is inserted into the air filter chamber 1a, and the threaded groove 32a is kept coaxial with the threaded post 12. The sealing top cover 3 is then rotated until the threaded groove 32a is tightened along the threaded post 12. At this time, the sealing top cover 3 is firmly covered on the air inlet tube 1 and sealed with the air filter chamber 1a.

[0038] Furthermore, an annular arc groove 3a is provided on the outer ring wall of the sealing top cover 3, and an annular air pipe 9 that is interference fit with the annular arc groove 3a is fixedly embedded on the inner ring wall at the opening of the air filter chamber 1a. Therefore, when the threaded groove 32a provided at the bottom of the mounting column 32 is tightened along the threaded column 12, the annular air pipe 9 is engaged with the annular arc groove 3a provided on the outer ring wall of the sealing top cover 3. Since the annular air pipe 9 is interference fit with the annular arc groove 3a and the annular air pipe 9 is an elastic structure, the annular air pipe 9 can structurally eliminate the hidden dangers of connection failure or sealing failure between the sealing top cover 3 and the opening of the air filter chamber 1a due to vibration of the air inlet tube 1.

[0039] Furthermore, a magnetic ring A81 is fixedly installed on the top of the air inlet duct 1, and a magnetic ring B82 with opposite magnetic properties to the magnetic ring A81 is fixedly installed on the inner cover surface of the sealing top cover 3. When the sealing top cover 3 is closed on the opening of the air filter chamber 1a, the magnetic ring B82 and the magnetic ring A81 are adsorbed against each other, thereby making the connection between the sealing top cover 3 and the air inlet duct 1 more secure.

[0040] In this solution, a deflection ring 11 is fixedly installed on the bottom wall of the deflection chamber 1b, and the deflection chamber 1b is divided into two symmetrical flow channels by the deflection ring 11. The tops of the two flow channels are interconnected and fixedly installed with sound-absorbing cotton 13. By arranging the deflection ring 11 in the deflection chamber 1b, the air filtered by the porous spiral ceramic plate 4 is deflected along the two flow channels, thereby reducing and increasing the flow rate of the air in the deflection chamber 1b, so that larger particles in the air naturally settle due to gravity, reducing the load on subsequent filter materials, and the sound-absorbing cotton 13 can greatly reduce the noise generated when the air flows in the two flow channels.

[0041] The lower cover surface of the annular thread bottom cover 2 is provided with a plurality of annularly distributed hand-holding grooves 2a, thereby facilitating the covering or removal of the annular thread bottom cover 2 on the internal thread cavity 1c1.

[0042] In the embodiments of the present invention, see Figure 2 、 Figure 3 as well as Figure 6 The filter membrane component 5 includes a sleeve tube 51, on which a plurality of hollow fiber membranes 52 in an annular triangular structure are sleeved, and adjacent hollow fiber membranes 52 in annular triangular structure are fixedly connected, and the membrane wall of the hollow fiber membrane 52 close to the sleeve tube 51 is fixedly embedded in the sleeve tube 51.

[0043] It should be noted that the hollow fiber membrane 52 adopts a ring-shaped triangular structure design, and part of the air can pass through the hollow fiber membrane 52 for filtration, and therefore part of the air can flow obliquely along the inclined part of the hollow fiber membrane 52, which greatly improves the air's travel in the air filter chamber 1a. Therefore, the air stays in the air filter chamber 1a longer, allowing the hollow fiber membrane 52 to more effectively capture dust and other particulate matter. When the air flows along the inclined part of the hollow fiber membrane 52, the vertical part of the hollow fiber membrane 52 can alleviate the impact of the air on the inclined part of the hollow fiber membrane 52 when it rises, reducing the degree of deformation of the hollow fiber membrane 52 and improving the service life of the hollow fiber membrane 52. The multi-layer hollow fiber membrane 52 can effectively purify the air.

[0044] Furthermore, the sleeve 51 is sleeved on the mounting post 32 and is tightly against the inner wall of the mounting post 32, preventing some air from escaping from the gap between the sleeve 51 and the mounting post 32. The outer edge of the hollow fiber membrane 52 with an annular triangular structure is against the inner wall of the air filter chamber 1a, preventing some air from escaping from the hollow fiber membrane 52 and the inner wall of the air filter chamber 1a.

[0045] Among them, a rubber sealing ring can also be embedded at the outer edge of the hollow fiber membrane 52, so that the rubber sealing ring is firmly in contact with the inner wall of the air filter chamber 1a, eliminating the hidden danger of some air overflowing from the hollow fiber membrane 52 and the inner wall of the air filter chamber 1a.

[0046] In the embodiment of the present invention, please refer to the following Figure 2 、 Figure 3 、 Figure 5 as well as Figure 7 , the mounting columns 32 on the upper and lower sides of the sleeve pipe 51 are both equipped with abutment parts 6, and the abutment parts 6 include springs 61, and abutment rings 62 are fixedly installed at both ends of the spring 61, and the spring 61 and the abutment rings 62 are both sleeved on the mounting columns 32, and the two abutment rings 62 of the abutment part 6 located above the sleeve pipe 51 are respectively abutted against the sealing top cover 3 and the upper pipe opening of the sleeve pipe 51, and the two abutment rings 62 of the abutment part 6 located below the sleeve pipe 51 are respectively abutted against the bottom wall of the air filter chamber 1a and the lower pipe opening of the sleeve pipe 51.

[0047] It should be noted that: abutments 6 are respectively provided on the sleeve tubes 51 on both sides of the filter membrane component 5, so that after the air enters the bottom of the air filter chamber 1a from the flow channel of the deflection chamber 1b, the air blows along the hollow fiber membrane 52. Therefore, since the upper and lower ends of the sleeve tube 51 are restricted by springs 61, the sleeve tube 51 can float slightly up and down along the mounting column 32. On the one hand, it can reduce the impact of air on the hollow fiber membrane 52 and effectively improve the protection of the hollow fiber membrane 52. On the other hand, the floating hollow fiber membrane 52 can shake off some of the dust attached to the surface, making the filtration time of the hollow fiber membrane 52 longer.

[0048] It is worth noting that: in order to facilitate the installation of the abutment 6 and the filter membrane component 5, magnetic powder is sprayed on the upper and lower ends of the sleeve 51, the outer ring surface of the abutment ring 62 and the inner cover surface of the sealing top cover 3. Therefore, when installing the filter membrane component 5, a set of abutment 6 can be first put on the installation column 32. At this time, the upper abutment ring 62 is adsorbed on the sealing top cover 3, and then the sleeve 51 is put on the installation column 32 and adsorbed with the lower abutment ring 62. Then another set of abutment 6 can be put on, and then the installation column 32 can be inserted into the threaded column 12 and tightened.

[0049] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An air intake structure for gas turbine air purification, characterized in that: The invention comprises an air inlet cylinder (1), wherein the air inlet cylinder (1) is provided with an air filter chamber (1a), a deflection chamber (1b) and a spiral chamber (1c) which are coaxially arranged and distributed from the inside to the outside, the air filter chamber (1a) passes through the top of the air inlet cylinder (1), and the cavity opening of the air filter chamber (1a) near the bottom is communicated with the deflection chamber (1b), an internal threaded cavity (1c1) communicated with the spiral cavity (1c) is provided on the air inlet cylinder (1) at the bottom of the spiral cavity (1c), and the internal threaded cavity (1c1) passes through the bottom of the air inlet cylinder (1), and a plurality of filter holes (1d) distributed in an annular manner and communicated with the deflection chamber (1b) are provided on the cavity wall of the spiral cavity (1c) near the bottom; A porous spiral ceramic plate (4) for filtering air is installed in the spiral cavity (1c), and a filter membrane component (5) for secondary filtering of air is installed in the air filter cavity (1a); The filter membrane component (5) includes a sleeve tube (51), on which a plurality of hollow fiber membranes (52) in an annular triangular structure are sleeved, and the adjacent hollow fiber membranes (52) in annular triangular structures are fixedly connected, and the membrane wall of the hollow fiber membrane (52) close to the sleeve tube (51) is fixedly embedded in the sleeve tube (51).

2. The air intake structure for gas turbine air purification according to claim 1, characterized in that: A coaxially arranged threaded column (12) is fixedly mounted on the inner bottom wall of the air filter chamber (1a), and a sealing top cover (3) for sealing the top opening of the air filter chamber (1a) is mounted on the threaded column (12); and an annular threaded bottom cover (2) for threaded connection and for sealing the internal threaded chamber (1c1) is mounted on the internal threaded chamber (1c1).

3. The air intake structure for gas turbine air purification according to claim 2, characterized in that: A coaxially arranged mounting post (32) is fixedly mounted on the inner disk wall of the sealing top cover (3), and a threaded groove (32a) is provided at the bottom of the mounting post (32). The mounting post (32) is threadedly fixedly connected to the threaded post (12) via the threaded groove (32a).

4. The air intake structure for gas turbine air purification according to claim 3, characterized in that: The sleeve tube (51) is sleeved on the mounting column (32), and the outer edge of the hollow fiber membrane (52) with an annular triangular structure abuts against the inner wall of the air filter chamber (1a).

5. The air intake structure for gas turbine air purification according to claim 4, characterized in that: Abutment members (6) are installed on the mounting posts (32) on both upper and lower sides of the sleeve tube (51), and the abutment members (6) include springs (61). Abutment rings (62) are fixedly installed at both ends of the spring (61), and the spring (61) and the abutment ring (62) are both sleeved on the mounting posts (32); Two abutment rings (62) of the abutment member (6) located above the sleeve tube (51) abut against the sealing top cover (3) and the upper tube opening of the sleeve tube (51) respectively; The two abutment rings (62) of the abutment member (6) located below the sleeve tube (51) respectively abut against the bottom wall of the air filter chamber (1a) and the lower pipe opening of the sleeve tube (51).

6. The air intake structure for gas turbine air purification according to claim 2, characterized in that: A plurality of exhaust ports (31) for exhausting the air filter chamber (1a) are fixedly mounted on the sealing top cover (3), and a plurality of air inlet pipes (7) communicating with the spiral chamber (1c) are fixedly mounted on the top of the air inlet cylinder (1).

7. The air intake structure for gas turbine air purification according to claim 5, characterized in that: A baffle ring (11) is fixedly mounted on the bottom wall of the baffle chamber (1b), and the baffle chamber (1b) is divided into two symmetrical flow channels by the baffle ring (11), and the tops of the two flow channels are interconnected and fixedly mounted with sound-absorbing cotton (13).

8. The air intake structure for gas turbine air purification according to claim 7, characterized in that: An annular arc groove (3a) is formed on the outer annular wall of the sealing top cover (3), and an annular air pipe (9) having an interference fit with the annular arc groove (3a) is fixedly embedded on the inner annular wall at the opening of the air filter chamber (1a).

9. The air intake structure for gas turbine air purification according to claim 2, characterized in that: A magnetic ring A (81) is fixedly mounted on the top of the air inlet cylinder (1), and a magnetic ring B (82) having a magnetic property opposite to that of the magnetic ring A (81) is fixedly mounted on the inner cover surface of the sealing top cover (3), and when the sealing top cover (3) is closed on the opening of the air filter chamber (1a), the magnetic ring B (82) and the magnetic ring A (81) are attracted to each other.

10. The air intake structure for gas turbine air purification according to claim 2, characterized in that: The lower cover surface of the annular threaded bottom cover (2) is provided with a plurality of annularly distributed hand-holding grooves (2a).

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