Gas turbine air inlet filtering and back flushing device

Abstract

The invention discloses a gas turbine inlet air filtering and back blowing device which comprises a purification assembly, a filter assembly and a back blowing assembly. An air inlet is formed in the purification assembly, and an exhaust port is formed in the purification assembly and used for purifying air entering a gas turbine; the plurality of air filter cartridges are arranged in the purification assembly and are used for filtering dust to purify gas; the blowback pipe is arranged on the purification assembly and extends into the air filter cartridge; the diaphragm valve is arranged in the blowback pipe and is used for controlling the on-off of the compressed gas; the blowback electromagnetic valve is arranged in the blowback pipe and is positioned at the part, extending into the air filter cartridge, of the blowback pipe; the control part is arranged on the air filter cartridge and is used for detecting the internal pressure difference of the air filter cartridge; and the control element is arranged on the purification assembly. According to the air filter device, the effect of blowing away dust and impurities attached to the outer wall of the air filter cylinder is achieved, the air filter device adapts to operation of a control system in a severe environment, the back-blowing cleaning effect is improved, back-blowing dust can be stored easily, and follow-up filtering is prevented from being affected.

Description

Technical Field

[0001] This invention relates to the field of gas turbine filtration technology, and in particular to a gas turbine intake filter backflushing device. Background Technology

[0002] A gas turbine is an internal combustion power machine that uses a continuously flowing gas as a working fluid to drive a high-speed rotating impeller, converting the energy of fuel into useful work. It is a type of rotating impeller thermal engine. The performance and operational reliability of a gas turbine are closely related to the quality and cleanliness of the air entering the unit. As the only line of defense for outside air entering the gas turbine, the gas turbine intake system must be equipped with a good intake system to filter the air entering the unit and remove impurities in order to ensure the high-efficiency operation of the unit.

[0003] Currently, to ensure the cleanliness of the air entering the gas turbine unit, water and dust are filtered from the gas turbine intake air. However, dust causes the air filter cartridge to become clogged, affecting the unit's output efficiency, reducing power generation efficiency, increasing fuel consumption, and making it impossible to control the continuous on / off of high-pressure gas. Cleaning the air filter cartridge is also difficult, as the control system operates in a harsh environment and is prone to frost in winter, making it unable to adapt to complex operating conditions. Furthermore, the dust blown back into the air filter cartridge spreads outside, affecting subsequent filtration. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing a gas turbine air intake filter backflushing device that effectively blows away dust and impurities attached to the outer wall of the air filter cartridge, adapts to the operation of the control system in harsh environments, improves the backflushing cleaning effect, and facilitates the collection of backflushing dust to avoid affecting subsequent filtration.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a gas turbine intake filter backflushing device, comprising: A purification component, which has an air inlet and an exhaust outlet, is used to purify the gas entering the gas turbine. Multiple air filter cartridges are installed inside the purification assembly to filter dust and purify the gas. The backflush pipe is installed on the purification unit and extends into the air filter cartridge; A diaphragm valve, located inside the backflush pipe, is used to control the flow of compressed gas. The backflush solenoid valve is installed inside the backflush pipe and is located in the part of the backflush pipe that extends into the air filter cartridge; The control unit, located on the air filter cartridge, is used to detect the pressure difference inside the air filter cartridge; A control element is mounted on the purification unit and electrically connected to the control unit to display data from the control unit; The control unit is electrically connected to the control element, the control unit is electrically connected to a PLC controller, and the control element is electrically connected to the PLC controller; An alarm switch, located on the backflush pipe, is used to alarm for compressed air pressure. A baffle-controlled solenoid valve is installed on the purification assembly to isolate the clean air outlet of the air filter cartridge from the air compressor inlet pipe. The dust collection unit is located inside the purification assembly and outside the air filter cartridge, and is used to collect the dust blown back by the air filter cartridge.

[0006] Furthermore, the control unit is electrically connected to a control element, which includes a control box and a display screen mounted on the control box.

[0007] Furthermore, the control unit includes a pressure gauge installed inside the control box, and the detection part of the pressure gauge extends into the air filter cartridge to detect the air pressure inside the air filter cartridge.

[0008] Furthermore, the control unit includes an intake filter differential pressure transmitter installed in the purification assembly and the air filter cartridge to detect the differential pressure between the air filter cartridge and the purification assembly.

[0009] Furthermore, the control unit also includes an intake air filter differential pressure switch installed in the purification component and the air filter cartridge. The intake air filter differential pressure switch is electrically connected to the control box and the display screen. The intake air filter differential pressure switch is used to detect the differential pressure between the air filter cartridge and the purification component.

[0010] Furthermore, the control unit also includes an intake air filter differential pressure switch installed in the purification component and the air filter cartridge. The intake air filter differential pressure switch is electrically connected to the control box and the display screen. The intake air filter differential pressure switch is used to detect the differential pressure between the air filter cartridge and the purification component.

[0011] Furthermore, the control unit also includes a humidity sensor installed in the control box, the display screen is used to display the data displayed by the humidity sensor, and the detection end of the humidity sensor extends into the air filter cartridge.

[0012] Furthermore, the control unit also includes a timer installed inside the control box, and the timer is electrically connected to the display screen.

[0013] Furthermore, the control unit also includes an intake air filter differential pressure transmitter installed in the purification component and the air filter cartridge. The intake air filter differential pressure transmitter is electrically connected to the control box and the display screen. The intake air filter differential pressure transmitter is used to detect the differential pressure between the air filter cartridge and the purification component. It also includes an intake filter differential pressure transmitter installed in the purification assembly and the air filter cartridge to detect the differential pressure between the air filter cartridge and the purification assembly.

[0014] Furthermore, the dust removal unit includes a suction cup disposed around the inner wall of the purification component and located outside the air filter cartridge, and a conduit disposed on the suction cup and extending to the outside of the purification component. It also includes a water tank at the end of the conduit, an electrically controlled valve in the middle of the conduit, a pump body in the middle of the conduit, and the pump body and the electrically controlled valve are electrically connected to a PLC controller.

[0015] The beneficial effects of this invention are reflected in: This invention involves filtering external air through an air filter cartridge within a purification assembly. When dust and moisture accumulate on the air filter cartridge, the control unit and control elements detect the differential pressure and humidity on the cartridge. The differential pressure is displayed on a screen and controlled by a PLC controller. This control activates the backflush solenoid valve on the backflush pipe and the diaphragm valve, allowing high-pressure gas from inside the backflush pipe to clean the air filter cartridge. The backflush solenoid valve switches the airflow direction, reversing the main airflow through the air filter cartridge. The air filter cartridge collapses and shakes off dust, and the backflush solenoid valve is unaffected by low temperature environments. Then, the PLC controller simultaneously controls the backflush solenoid valve to backflush the dust on the air filter cartridge and starts the pump body and the solenoid valve to collect the dust in the water tank. The pump body and the solenoid valve open synchronously to extract the dust from the suction cup, preventing the dust from not being discharged and preventing it from affecting the subsequent filtration of the air filter cartridge. The backflush solenoid valve improves the efficiency of backflushing the air filter cartridge, achieving the effect of blowing off the dust and impurities attached to the outer wall of the air filter cartridge, adapting the control system to operate in harsh environments, and facilitating the collection of backflush dust to avoid affecting subsequent filtration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the gas turbine intake filter backflushing system of the present invention; Figure 3 This is a schematic diagram of the gas turbine intake filter system of the present invention; Figure 4 This is a schematic diagram of the backflushing mechanism of the present invention; Figure 5 This is a schematic front view of the dust removal unit of the present invention.

[0017] In the picture: 1. Purification components; 11. Backflush pipe; 2. Air filter cartridge; 3. Backflush solenoid valve; 4. Diaphragm valve; 5. Air intake; 6. Control unit; 61. Pressure gauge; 62. First intake air filter differential pressure transmitter; 63. First intake air filter differential pressure switch; 64. Second intake air filter differential pressure switch; 65. Humidity sensor; 66. Timer; 67. Intake air filter differential pressure transmitter; 68. Second intake air filter differential pressure transmitter; 7. Control components; 8. Exhaust port; 9. Alarm switch; 10. Baffle-controlled solenoid valve; 12. Dust removal unit; 121. Suction cup; 122. Conduit; 123. Water tank; 124. Pump body; 125. Electrically controlled valve. Detailed Implementation

[0018] 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 a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-5 This invention discloses a gas turbine intake filter backflushing device, comprising: Purification component 1 is provided with an air inlet 5 and an exhaust outlet 8, which are used to purify the gas entering the gas turbine and filter the moisture in the air. Purification component 1 is connected to the gas turbine and filters the gas entering the gas turbine to prevent dust and other impurities from entering the gas turbine and avoid affecting the service life of the gas turbine. Multiple air filter cartridges 2 are installed inside the purification assembly 1 to filter dust and purify the gas. The air filter cartridges 2 are used to isolate dust and moisture to prevent dust from entering the gas turbine and to facilitate backflushing and cleaning of the air filter cartridges 2 to avoid clogging of the air filter cartridges 2. Backflush pipe 11 is installed on the purification component 1 and extends into the air filter cartridge 2. It is used to provide high-pressure gas for backflush cleaning of the air filter cartridge 2, so as to facilitate backflush cleaning and avoid clogging of the air filter cartridge 2. Diaphragm valve 4 is installed inside backflush pipe 11 to control the flow of compressed gas and facilitate cleaning of air filter cartridge 2; The backflush solenoid valve 3 is installed inside the backflush pipe 11 and is located in the part of the backflush pipe 11 that extends into the air filter cartridge 2. It is used to switch the airflow direction so that the main airflow flows in the opposite direction through the air filter cartridge 2, and the dust is shaken off by the reverse airflow and the collapse of the air filter cartridge 2. The control unit 6 is installed on the air filter cartridge 2 and is used to detect the pressure difference inside the air filter cartridge 2; Control element 7 is installed on the purification assembly 1 and electrically connected to the control unit 6. It is used to display the data of the control unit 6. The control unit 6 and control element 7 detect the air pressure and humidity inside the air filter cartridge 2 and the purification assembly 1 through the PLC controller. When the air pressure inside the air filter cartridge 2 is less than the air pressure inside the purification assembly 1, the PLC controller controls the backflush solenoid valve 3 on the backflush pipe 11 to open. The high-pressure gas inside the backflush pipe 11 is released in the air filter cartridge 2, causing the dust and moisture on the air filter cartridge 2 to be shaken off, realizing the backflush cleaning of the air filter cartridge 2 and preventing the air filter cartridge 2 from clogging. The control unit 6 is electrically connected to the control element 7. The control unit 6 is electrically connected to a PLC controller. The control element 7 is electrically connected to the PLC controller. The PLC controller is used to control the electrical connection between the control unit and the control element 7. Alarm switch 9 is installed on backflush pipe 11 to alarm the compressed air pressure. When the compressed air pressure is abnormal, the PLC controller controls the alarm switch 9 to open and display it on the display screen of control unit 6, issuing an alarm for abnormal compressed air pressure. A baffle-controlled solenoid valve 10 is installed on the purification assembly 1 to isolate the clean air outlet of the air filter cartridge 2 from the air compressor inlet pipe. The dust removal unit 12 is located inside the purification component 1 and outside the air filter cartridge 2. It is used to collect the dust blown back by the air filter cartridge 2. The PLC controller is electrically connected to the dust removal unit 12. The PLC controller synchronously controls the operation of the dust removal unit 12 and the back-blowing solenoid valve 3, and simultaneously blows back the dust and collects the dust.

[0020] In a specific embodiment, the control unit 6 is electrically connected to the control element 7. The control element 7 includes a control box and a display screen mounted on the control box. The control box is electrically connected to the display screen. The control box contains processors and controllers for each element and is electrically connected to the PLC controller for displaying data.

[0021] In one embodiment, the control unit 6 includes a pressure gauge 61 disposed in the control box. The detection part of the pressure gauge 61 extends into the air filter cartridge 2 to detect the air pressure inside the air filter cartridge 2. The pressure gauge 61 is used to detect the air pressure inside the air filter cartridge 2 and display it on the display screen on the control box. The pressure gauge 61 is used to set the pressure range of the air pressure inside the air filter cartridge 2 and the purification component 1. When the pressure of the air pressure inside the air filter cartridge 2 and the purification component 1 exceeds the range, the PLC controller controls the backflush solenoid valve 3 to open.

[0022] In a specific embodiment, the control unit 6 includes a first intake air filter differential pressure transmitter 62 disposed in the purification component 1 and the air filter cartridge 2. The first intake air filter differential pressure transmitter 62 is a micro differential pressure transmitter, and the code of the first intake air filter differential pressure transmitter 62 is 96tf-1. It is used to detect the differential pressure between the air filter cartridge 2 and the purification component 1. The first intake air filter differential pressure transmitter 62 is electrically connected to the control box, the display screen and the PLC controller. The PLC controller is used to control the first intake air filter differential pressure transmitter 62 to detect the air pressure inside the purification component 1 and the air filter cartridge 2. The detected data is transmitted to the display screen and displayed on the display screen.

[0023] In one embodiment, the control unit 6 further includes a first intake air filter differential pressure switch 63 disposed in the purification component 1 and the air filter cartridge 2. The model code of the first intake air filter differential pressure switch 63 is 63cs2a. The first intake air filter differential pressure switch 63 is electrically connected to the control box and the display screen. The first intake air filter differential pressure switch 63 is used to detect the differential pressure between the air filter cartridge 2 and the purification component 1. The first intake air filter differential pressure switch 63 is electrically connected to the control box, the display screen and the PLC controller. The PLC controller is used to control the first intake air filter differential pressure switch 63 to detect the air pressure inside the purification component 1 and the air filter cartridge 2. The detected data is transmitted to the display screen and displayed on the display screen.

[0024] In a specific embodiment, the control unit 6 further includes a second intake air filter differential pressure switch 64 disposed in the purification component 1 and the air filter cartridge 2. The second intake air filter differential pressure switch 64 is coded as cs2b. The second intake air filter differential pressure switch 64 is electrically connected to the control box and the display screen. The second intake air filter differential pressure switch 64 is used to detect the differential pressure between the air filter cartridge 2 and the purification component 1. The second intake air filter differential pressure switch 64 is electrically connected to the control box, the display screen and the PLC controller. The PLC controller is used to control the second intake air filter differential pressure switch 64 to detect the air pressure inside the purification component 1 and the air filter cartridge 2. The detected data is transmitted to the display screen and displayed on the display screen.

[0025] In one embodiment, the control unit 6 further includes a humidity sensor 65 disposed in the control box, and a display screen is used to display the data displayed by the humidity sensor 65. The detection end of the humidity sensor 65 extends into the air filter cartridge 2. The humidity sensor 65 is used to detect the humidity of the moisture isolated on the air filter cartridge 2, and the signal is transmitted to the control box and displayed on the display screen.

[0026] In a specific embodiment, the control unit 6 also includes a timer 66 installed in the control box. The timer 66 is electrically connected to the display screen, which displays the data of the timer 66 and controls the opening time of the backflush solenoid valve 3.

[0027] In one embodiment, the control unit 6 further includes an intake air filter differential pressure transmitter 67 disposed in the purification component 1 and the air filter cartridge 2. The intake air filter differential pressure transmitter 67 is coded as 96CS-3. The intake air filter differential pressure transmitter 67 is electrically connected to the control box and the display screen. The intake air filter differential pressure transmitter 67 is used to detect the differential pressure between the air filter cartridge 2 and the purification component 1. The intake air filter differential pressure transmitter 67 is electrically connected to the control box, the display screen and the PLC controller. The PLC controller is used to control the intake air filter differential pressure transmitter 67 to detect the air pressure inside the purification component 1 and the air filter cartridge 2. The detected data is transmitted to the display screen and displayed on the display screen.

[0028] It also includes a second air intake differential pressure transmitter 68 installed in the purification component 1 and the air filter cartridge 2. The second air intake differential pressure transmitter is coded as 96tf-2 and is used to detect the differential pressure between the air filter cartridge 2 and the purification component 1. The second air intake differential pressure transmitter 68 is electrically connected to the control box, the display screen and the PLC controller. The PLC controller is used to control the second air intake differential pressure transmitter 68 to detect the air pressure inside the purification component 1 and the air filter cartridge 2. The detected data is transmitted to the display screen and displayed on the screen.

[0029] In a specific embodiment, the dust removal unit 12 includes a suction cup 121 disposed around the inner wall of the purification component 1 and located outside the air filter cartridge 2, and a conduit 122 disposed on the suction cup 121 and extending to the outside of the purification component 1. It also includes a water tank 123 located at the end of the conduit 122, a one-way exhaust valve on the water tank 123, an electrically controlled valve 125 in the middle of the conduit 122, and a pump body 124 in the middle of the conduit 122. The pump body 124 and the electrically controlled valve 125 are electrically connected to a PLC controller. The PLC controller simultaneously controls the backflush solenoid valve 3 to backflush the dust on the air filter cartridge 2 and starts the pump body 124 and the electrically controlled valve 125 to collect the dust in the water tank 123. The pump body 124 and the electrically controlled valve 125 open synchronously to extract the dust from the suction cup 121, so as to prevent the dust from not being discharged and to prevent it from affecting the subsequent filtration of the air filter cartridge 2.

[0030] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0032] Additionally, "multiple" refers to two or more.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas turbine intake filter backflushing device, characterized in that, include: Purification component (1), the purification component (1) is provided with an air inlet (5) and an exhaust port (8) for purifying the gas entering the gas turbine; Multiple air filter cartridges (2) are installed inside the purification assembly (1) to filter dust and purify the gas. Backflush pipe (11) is installed on the purification assembly (1) and extends into the air filter cartridge (2); A diaphragm valve (4) is installed inside the backflush pipe (11) to control the flow of compressed gas. The backflush solenoid valve (3) is installed inside the backflush pipe (11) and is located in the part of the backflush pipe (11) that extends into the air filter cartridge (2); The control unit (6) is installed on the air filter cartridge (2) to detect the pressure difference inside the air filter cartridge (2); A control element (7) is disposed on the purification assembly (1) and electrically connected to the control unit (6) for displaying data of the control unit (6); The control unit (6) is electrically connected to the control element (7), the control unit (6) is electrically connected to a PLC controller, and the control element (7) is electrically connected to the PLC controller; An alarm switch (9) is installed on the backflush pipe (11) to provide an alarm for compressed air pressure. A baffle control solenoid valve (10) is installed on the purification assembly (1) to isolate the clean air outlet of the air filter cartridge (2) from the air compressor inlet pipe; The dust removal unit (12) is located inside the purification assembly (1) and outside the air filter cartridge (2) to collect the dust blown back by the air filter cartridge (2).

2. The gas turbine intake filter backflushing device according to claim 1, characterized in that: The control unit (6) is electrically connected to the control element (7), which includes a control box and a display screen mounted on the control box.

3. The gas turbine intake filter backflushing device according to claim 2, characterized in that: The control unit (6) includes a pressure gauge (61) installed in the control box. The detection part of the pressure gauge (61) extends into the air filter cartridge (2) to detect the air pressure inside the air filter cartridge (2).

4. The gas turbine intake filter backflushing device according to claim 2, characterized in that: The control unit (6) includes a first intake filter differential pressure transmitter (62) installed in the purification assembly (1) and the air filter cartridge (2) to detect the differential pressure between the air filter cartridge (2) and the purification assembly (1); It also includes a differential pressure sensor installed in the purification assembly (1) and the air filter cartridge (2) to detect the differential pressure between the air filter cartridge (2) and the purification assembly (1).

5. The gas turbine intake filter backflushing device according to claim 2, characterized in that: The control unit (6) also includes a first intake air filter differential pressure switch (63) disposed in the purification component (1) and the air filter cartridge (2). The first intake air filter differential pressure switch (63) is electrically connected to the control box and the display screen. The first intake air filter differential pressure switch (63) is used to detect the differential pressure between the air filter cartridge (2) and the purification component (1).

6. The gas turbine intake filter backflushing device according to claim 2, characterized in that: The control unit (6) also includes a second intake air filter differential pressure switch (64) disposed in the purification component (1) and the air filter cartridge (2). The second intake air filter differential pressure switch (64) is electrically connected to the control box and the display screen. The second intake air filter differential pressure switch (64) is used to detect the differential pressure between the air filter cartridge (2) and the purification component (1).

7. The gas turbine intake filter backflushing device according to claim 2, characterized in that: The control unit (6) also includes a humidity sensor (65) installed in the control box. The display screen is used to display the data displayed by the humidity sensor (65). The detection end of the humidity sensor (65) extends into the air filter cartridge (2).

8. The gas turbine intake filter backflushing device according to claim 2, characterized in that: The control unit (6) also includes a timer (66) installed in the control box, and the timer (66) is electrically connected to the display screen.

9. The gas turbine intake filter backflushing device according to claim 1, characterized in that: The control unit (6) also includes an intake air filter differential pressure transmitter (67) installed in the purification component (1) and the air filter cartridge (2). The intake air filter differential pressure transmitter (67) is electrically connected to the control box and the display screen. The intake air filter differential pressure transmitter (67) is used to detect the differential pressure between the air filter cartridge (2) and the purification component (1). It also includes a second intake filter differential pressure transmitter (68) installed in the purification assembly (1) and the air filter cartridge (2) to detect the differential pressure between the air filter cartridge (2) and the purification assembly (1).

10. The gas turbine intake filter backflushing device according to claim 1, characterized in that: The dust removal unit (12) includes a suction cup (121) disposed around the inner wall of the purification component (1) and located outside the air filter cartridge (2) and a conduit (122) disposed on the suction cup (121) and extending to the outside of the purification component (1). It also includes a water tank (123) at the end of the conduit (122), an electrically controlled valve (125) in the middle of the conduit (122), a pump body (124) in the middle of the conduit (122), and the pump body (124) and the electrically controlled valve (125) are electrically connected to a PLC controller.

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