An oil mist separator for gas turbines

Abstract

This invention relates to the field of gas turbine technology, specifically an oil mist separator for gas turbines. The separator includes a hollow sphere with two connecting pipes fixedly mounted on it, communicating with its interior. A removable collection tank is installed at the bottom of the hollow sphere, and a removable Z-shaped connecting pipe is installed on one side of the hollow sphere. A filtration mechanism is also included, with the two connecting pipes symmetrically arranged and each having a removable filtration mechanism installed at its upper end. Each filtration mechanism includes an installation pipe installed at the upper end of the connecting pipe, with a filter cylinder fixedly installed inside the installation pipe. The bottom of the filter cylinder is inserted into the connecting pipe and fitted with a gap in the connecting pipe. The filter cylinder has through holes and is filled with a carbon-based porous material. This invention's alternating operation of the two filtration mechanisms avoids downtime for cleaning due to saturation of a single filtration mechanism, ensuring continuous and stable operation of the oil mist separator. This provides strong support for the normal operation of the gas turbine and reduces production interruptions caused by oil mist treatment issues.

Description

Technical Field

[0001] This invention relates to the field of gas turbine technology, specifically to an oil mist separator for gas turbines. Background Technology

[0002] A gas turbine is a thermal engine that converts the chemical energy of fuel into mechanical energy, and it is widely used in power generation, aircraft propulsion, marine power, and industrial drive. During operation, gas turbines generate a large amount of oil mist. If this oil mist is directly released into the atmosphere, it will cause serious environmental pollution and waste energy. Furthermore, harmful substances in the oil mist may also pose health risks, such as causing respiratory diseases.

[0003] Currently, although some oil mist treatment equipment exists, such as electrostatic precipitators, single treatment methods often fail to achieve ideal purification results. When electrostatic precipitators treat oil mist, some oil mist may not be completely removed, resulting in a certain amount of oil mist remaining in the emitted gas, leading to poor purification. To address this, simple filters are added to the exhaust port for secondary filtration. However, these filters require manual disassembly and cleaning at regular intervals, which is cumbersome. Furthermore, when the gas turbine needs to operate continuously for extended periods, the disassembly and cleaning of the filters becomes even more difficult.

[0004] Therefore, it is necessary to provide a new oil mist separator for gas turbines to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide an oil mist separator for gas turbines, which solves the problem mentioned in the background art that existing filter elements require manual disassembly and cleaning at regular intervals, which is cumbersome, and the disassembly and cleaning of filter elements is even more troublesome when the gas turbine needs to operate continuously for a long time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oil mist separator for a gas turbine, comprising a hollow sphere, two connecting pipes communicating with the interior of the hollow sphere are fixedly installed on the hollow sphere, a detachable collection tank is installed at the bottom of the hollow sphere, and a detachable Z-shaped connecting pipe is installed on one side of the hollow sphere;

[0007] The filter mechanism comprises two symmetrically arranged connecting pipes, each with a detachable filter mechanism mounted on its upper end. Each filter mechanism includes an installation pipe mounted on the upper end of the connecting pipe, a filter cylinder fixedly installed inside the installation pipe, the bottom of the filter cylinder inserted into the connecting pipe and fitted with a gap in the connecting pipe, a through hole on the filter cylinder, and carbon-based porous material filling the inside of the filter cylinder. A heating mechanism is mounted on the filter cylinder, capable of heating the carbon-based porous material inside the filter cylinder. A detachable connecting cylinder is mounted on the upper end of the filter cylinder, and a filter screen is fixedly installed at the bottom of the connecting cylinder. Both connecting pipes are equipped with electrically controlled valves to achieve the closure of the connecting pipe cavity.

[0008] The middle section of the Z-shaped connecting pipe is vertically arranged and located diagonally above the collection tank. Several sets of staggered baffles are fixedly installed inside the Z-shaped connecting pipe, and all sets of baffles are located in the middle section of the Z-shaped connecting pipe. The baffles 21 cause the oil mist to continuously change direction and speed during the flow process, generating turbulence. This helps the oil droplets in the oil mist to collide and agglomerate with each other, thereby increasing the oil droplet size and making it easier for them to separate from the airflow under the action of gravity, thus improving the separation efficiency of the oil mist.

[0009] The heating mechanism includes several heating rods. The filter cylinder has several vertical cavities distributed around its axis, and the heating rods are respectively inserted into the multiple vertical cavities. The filter cylinder also has an annular cavity communicating with the multiple vertical cavities, and a heat-conducting rod is installed in the annular cavity. The heating rods are connected in parallel through the heat-conducting rods, and one end of the heat-conducting rod extends to the outside of the mounting tube.

[0010] The carbon-based porous material is a carbon aerogel with high porosity and high temperature resistance.

[0011] Preferably, an air inlet connector is fixedly installed on one side of the hollow sphere, and the Z-shaped connecting pipe is threadedly connected to the air inlet connector. A drain connector is fixedly installed at the bottom of the hollow sphere, and the collection tank is threadedly connected to the drain connector.

[0012] Preferably, the mounting tube is threaded to the connecting tube, and a sealing gasket is fixedly installed on the contact surface between the mounting tube and the connecting tube.

[0013] Preferably, a heat-conducting rod extending outside the mounting tube is fitted with a heat-insulating protective sleeve.

[0014] Preferably, the connecting cylinder is threadedly connected to the filter cylinder, and a sealing gasket is fixedly installed on the contact surface between the connecting cylinder and the filter cylinder.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The alternating operation mode of the two filtration mechanisms in this invention avoids the need for shutdown and cleaning due to the adsorption saturation of a single filtration mechanism, ensuring the continuous and stable operation of the oil mist separator, providing strong support for the normal operation of the gas turbine, and reducing production interruptions caused by oil mist treatment problems.

[0017] 2. The two filtration mechanisms in this invention are used alternately. When the carbon-based porous material in one filtration mechanism adsorbs a large amount of oil mist, that mechanism can be turned off and the other one can be turned on to work. The oil in the carbon-based porous material in the closed filtration mechanism is cleaned by the heating mechanism, so that it can be reused, reducing the time for manual cleaning of the filter material and reducing the cost of use.

[0018] 3. This invention incorporates several sets of staggered baffles inside the Z-shaped manifold. These baffles cause the oil mist to continuously change direction and velocity during flow, generating turbulence. This facilitates the collision and aggregation of oil droplets within the oil mist, thereby increasing the droplet size and making it easier for them to separate from the airflow under gravity, thus improving the oil mist separation efficiency. Attached Figure Description

[0019] Figure 1 A schematic diagram of a preferred embodiment of the oil mist separator for gas turbines provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the hollow sphere in this invention;

[0021] Figure 3 This is a schematic diagram of the filtration mechanism in this invention;

[0022] Figure 4 This is a schematic diagram of the filter cartridge in this invention;

[0023] Figure 5 This is a top view of the cross-sectional structure of the filter cartridge in this invention;

[0024] Figure 6 This is a schematic diagram of the connecting cylinder in this invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the Z-type butt joint pipe in this invention.

[0026] In the diagram: 1. Hollow sphere; 11. Air inlet connector; 12. Drain connector; 2. Z-shaped connecting pipe; 21. Baffle plate; 3. Connecting pipe; 31. Electrically controlled valve; 4. Collection tank; 5. Filtration mechanism; 51. Installation pipe; 52. Filter cylinder; 521. Through hole; 522. Vertical cavity; 523. Annular cavity; 53. Connecting cylinder; 531. Filter screen; 55. Carbon-based porous material; 6. Heating mechanism; 61. Heating rod; 62. Heat-conducting rod; 63. Heat insulation protective sleeve. Detailed Implementation

[0027] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 - Figure 7 The diagram shows an oil mist separator for a gas turbine, comprising a hollow sphere 1 with two connecting pipes 3 fixedly mounted on it and communicating with its interior. A removable collection tank 4 is installed at the bottom of the hollow sphere 1, and a removable Z-shaped connecting pipe 2 is installed on one side of the hollow sphere 1. A filter mechanism 5 is also included, with the two connecting pipes 3 symmetrically arranged and each having a removable filter mechanism 5 installed at its upper end. The filter mechanism 5 includes an installation pipe 51 installed at the upper end of the connecting pipes 3, and a filter cylinder 52 fixedly installed inside the installation pipe 51. The bottom is inserted into the connecting pipe 3 and fits the connecting pipe 3 with a gap. The filter cylinder 52 has a through hole 521. The filter cylinder 52 is filled with carbon-based porous material 55. The filter cylinder 52 is equipped with a heating mechanism 6, which can heat the carbon-based porous material 55 inside the filter cylinder 52. The upper end of the filter cylinder 52 is equipped with a detachable connecting cylinder 53. The bottom of the connecting cylinder 53 is fixedly equipped with a filter screen 531. Both connecting pipes 3 are equipped with an electric control valve 31 to achieve the closure of the cavity of the connecting pipe 3.

[0029] In this invention, the device is connected to an electrostatic precipitator via a Z-shaped connecting pipe 2 for combined purification of gas turbine exhaust gas. The device performs secondary treatment on the oil mist after electrostatic precipitator treatment, further reducing the oil mist content and minimizing environmental pollution. The oil mist enters the hollow sphere 1 through the Z-shaped connecting pipe 2, and then enters the connecting pipe 3, where it undergoes secondary treatment via a filter mechanism 5. The oil mist contacts the carbon-based porous material 55 through the through-holes 521 on the filter cylinder 52, where it is adsorbed. The carbon-based porous material 55 has a large specific surface area and good adsorption performance, effectively adsorbing the oil in the mist. The mist is then filtered again through a filter screen 531 before being discharged, achieving efficient purification of the oil mist and improving exhaust gas quality. This invention has two filter mechanisms 5, but only one is used at a time. Another filter mechanism 5 is shut off via an electric control valve 31. The electric control valve 31 shuts off the connecting pipe 3, thereby shutting down the filter mechanism 5 connected to it. The two filter mechanisms 5 are used alternately. When the carbon-based porous material 55 in one filter mechanism 5 adsorbs a large amount of oil mist, that mechanism can be shut off and the other can be turned on to work, ensuring that the oil mist separator operates continuously and stably without having to stop for a long time to clean the adsorbent material. The carbon-based porous material 55 in the filter mechanism 5 that has adsorbed too much oil mist needs to be cleaned of the oil attached to it. The filter cylinder 52 is heated by the heating mechanism 6 to exchange heat with the carbon-based porous material 55. The oil on the carbon-based porous material 55 is heated and flows out from the carbon-based porous material 55. The flowing oil will flow along the pipe wall until it flows into the collection tank 4 and is collected, which facilitates the cleaning of the adsorbent material. The carbon-based porous material 55 can be reused, reducing the time for manual cleaning of the filter material and reducing the cost of use.

[0030] The design of the hollow sphere 1 and the connecting pipe 3 makes the flow path of oil mist in the device more reasonable. Some oil mist will adhere to the inner wall of the hollow sphere 1 and the connecting pipe 3 and slide into the collection tank 4, which increases the oil collection efficiency and reduces the residue of oil mist in the device.

[0031] Among them, the carbon-based porous material 55 is a carbon aerogel with high porosity and high temperature resistance. The high porosity gives the carbon aerogel a huge specific surface area, which can provide more adsorption sites, thus giving it a stronger adsorption capacity for oil molecules and other impurities in oil mist. It can effectively remove harmful substances in oil mist and improve the purification effect of oil mist separator. The gas turbine generates high temperature during operation. The high temperature resistance of carbon aerogel enables it to maintain a stable structure and performance in such an environment. It will not deform, melt or lose its adsorption function due to high temperature, thus ensuring the long-term stable operation of the filter mechanism 5 under the high temperature conditions of the gas turbine.

[0032] The filter cartridge 52 and the solenoid valve 31 have sufficient spacing so as not to hinder the use of the solenoid valve 31.

[0033] The model of the solenoid valve 54 is SLA-5V-12VDC.

[0034] For further details, please refer to [link / reference]. Figure 2 An air inlet connector 11 is fixedly installed on one side of the hollow sphere 1, and the Z-shaped connecting pipe 2 is threadedly connected to the air inlet connector 11. A drain connector 12 is fixedly installed at the bottom of the hollow sphere 1, and the collection tank 4 is threadedly connected to the drain connector 12. This connection method facilitates the installation, commissioning, and subsequent maintenance and repair of the equipment by the staff. When it is necessary to replace the Z-shaped connecting pipe 2, the collection tank 4, or to inspect and clean the inside of the hollow sphere 1, it is only necessary to use the appropriate tools to unscrew the threaded connection, without complicated operations, which can save a lot of time and labor costs.

[0035] The middle section of the Z-type connecting pipe 2 is vertically positioned and located diagonally above the collection tank 4. This vertical positioning of the middle section facilitates the natural fall of oil mist under gravity, preventing oil from backflowing from the collection tank into the Z-type connecting pipe 2 due to unforeseen circumstances. This, in turn, prevents oil from flowing back to the electrostatic precipitator or other upstream equipment, ensuring the normal operation of the entire oil mist treatment system and reducing potential equipment damage and malfunctions caused by oil backflow.

[0036] For further details, please refer to [link / reference]. Figure 4 and Figure 5 The heating mechanism 6 includes several heating rods 61. The filter cylinder 52 has several vertical cavities 522 distributed around its axis, and the heating rods 61 are respectively inserted into the multiple vertical cavities 522. The filter cylinder 52 also has an annular cavity 523 that communicates with the multiple vertical cavities 522, and a heat-conducting rod 62 is installed in the annular cavity 523. The heating rods 61 are connected in parallel through the heat-conducting rods 62, and one end of the heat-conducting rod 62 extends to the outside of the mounting tube 51.

[0037] It should be noted that: the external heating device heats the externally located heat-conducting rod 62, so that its heat is transferred to the heating rod 61, and heat exchange is carried out on the filter cylinder 52, so that the oil on the carbon-based porous material 55 is heated and flows out from the carbon-based porous material 55.

[0038] Among them, the heat-conducting rod 62 extending outside the mounting tube 51 is fitted with a heat-insulating protective sleeve 63, which wraps the heat-conducting rod 62 to prevent heat loss.

[0039] The mounting pipe 51 is threaded to the connecting pipe 3, and a sealing gasket is fixedly installed on the contact surface between the mounting pipe 51 and the connecting pipe 3; the connecting cylinder 53 is threaded to the filter cylinder 52, and a sealing gasket is fixedly installed on the contact surface between the connecting cylinder 53 and the filter cylinder 52; the threaded connection provides a reliable mechanical connection, ensuring that the mounting pipe 51 and the connecting pipe 3, and the connecting cylinder 53 and the filter cylinder 52 remain tightly connected during equipment operation, and are not easily loosened due to vibration, pressure changes, or other factors, thus ensuring the stability of the device and facilitating its long-term stable operation; the sealing gasket enhances the sealing of the component connections, preventing oil mist from leaking from the contact surface between the mounting pipe 51 and the connecting pipe 3, and between the connecting cylinder 53 and the filter cylinder 52, ensuring that the oil mist can only be processed through the filtration mechanism 5 according to the designed path.

[0040] Further reference Figure 7 The Z-shaped connecting pipe 2 has several sets of staggered baffles 21 fixedly installed inside, and all sets of baffles 21 are located in the middle section of the Z-shaped connecting pipe 2. The baffles 21 cause the oil mist to continuously change direction and speed during the flow process, generating turbulence. This helps the oil droplets in the oil mist to collide and agglomerate with each other, thereby increasing the oil droplet size and making it easier for them to separate from the airflow under the action of gravity, thus improving the separation efficiency of the oil mist.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil mist separator for a gas turbine, comprising: Hollow sphere (1), on which two connecting pipes (3) communicating with its interior are fixedly installed, a detachable collection tank (4) is installed at the bottom of the hollow sphere (1), and a detachable Z-shaped connecting pipe (2) is installed on one side of the hollow sphere (1). Its characteristic is that it further includes: The filter mechanism (5) consists of two symmetrically arranged connecting pipes (3) with detachable filter mechanisms (5) installed at their upper ends. Each filter mechanism (5) includes an installation pipe (51) installed at the upper end of the connecting pipe (3). A filter cylinder (52) is fixedly installed inside the installation pipe (51). The bottom of the filter cylinder (52) is inserted into the connecting pipe (3) and is in clearance fit with the connecting pipe (3). A through hole (521) is provided on the filter cylinder (52). The filter cylinder (52) is filled with carbon-based porous material (55). A heating mechanism (6) is installed on the filter cylinder (52), and the heating mechanism (6) can heat the filter. The carbon-based porous material (55) inside the filter cylinder (52) is heated. A detachable connecting cylinder (53) is installed at the upper end of the filter cylinder (52). A filter screen (531) is fixedly installed at the bottom of the connecting cylinder (53). An electric control valve (31) is installed on both connecting pipes (3) to achieve the closure of the cavity of the connecting pipe (3). The filter cylinder (52) is heated by the heating mechanism (6) to exchange heat with the carbon-based porous material (55). The oil on the carbon-based porous material (55) is heated and flows out from the carbon-based porous material (55). The oil flows out along the pipe wall until it flows into the collection tank (4) and is collected. The middle section of the Z-shaped connecting pipe (2) is vertically set, and the Z-shaped connecting pipe (2) is located diagonally above the collection tank (4); the vertically set middle section is conducive to the oil mist falling naturally under the action of gravity, which can prevent the oil in the collection tank from flowing back into the Z-shaped connecting pipe (2) due to accidental circumstances, thereby preventing the oil from flowing back to the electrostatic precipitator or other upstream equipment. The Z-shaped connecting pipe (2) is fixedly installed with several sets of staggered baffles (21), and the baffles (21) are all located in the middle section of the Z-shaped connecting pipe (2). The baffles (21) cause the oil mist to change direction and speed continuously during the flow process, generating turbulence. This helps the oil droplets in the oil mist to collide and condense with each other, thereby increasing the oil droplet size and making it easier for them to separate from the airflow under the action of gravity, thus improving the separation efficiency of the oil mist. The heating mechanism (6) includes several heating rods (61). The filter cylinder (52) has several vertical cavities (522) distributed around its axis. The heating rods (61) are respectively inserted into the vertical cavities (522). The filter cylinder (52) also has an annular cavity (523) communicating with the vertical cavities (522). A heat-conducting rod (62) is installed in the annular cavity (523). The heating rods (61) are connected in parallel through the heat-conducting rod (62), and one end of the heat-conducting rod (62) extends to the outside of the mounting tube (51). The carbon-based porous material (55) is a carbon aerogel with high porosity and high temperature resistance. An air inlet connector (11) is fixedly installed on one side of the hollow sphere (1), and the Z-shaped connecting pipe (2) is threadedly connected to the air inlet connector (11). A drain connector (12) is fixedly installed at the bottom of the hollow sphere (1), and the collection tank (4) is threadedly connected to the drain connector (12). Some oil mist will adhere to the inner wall of the hollow sphere (1) and the connecting pipe (3) and slide into the collection tank (4). The mounting tube (51) is threadedly connected to the connecting tube (3), and a sealing gasket is fixedly installed on the contact surface between the mounting tube (51) and the connecting tube (3); A heat-insulating protective sleeve (63) is fitted on the heat-conducting rod (62) extending outside the mounting tube (51); The connecting cylinder (53) is threadedly connected to the filter cylinder (52), and a sealing gasket is fixedly installed on the contact surface between the connecting cylinder (53) and the filter cylinder (52).

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