Oil circulating filtering device of steam turbine

Abstract

The utility model provides a steam turbine oil liquid circulating filtering device which comprises a steam turbine, a compressor, an oil station, a speed regulating system, a coupler, a filtering device and a cooler, an oil inlet of a filter is connected with two filtering tanks which are connected in parallel, one filtering tank is opened, and the other filtering tank is standby, is provided with a window for observing the oil level and is connected with the oil station; a plurality of 100-mesh / cun filter screens in the filter tank are clamped in an upper grating plate and a lower grating plate and are fixed by studs, oil is clean and free of hard granular substances through multi-layer filtration, bearings and gears of the steam turbine and a compressor are protected against abrasion and long in service life, fault maintenance is reduced, the steam turbine operates stably, and the service life of the steam turbine is prolonged. Lubricating oil in the steam turbine and the compressor enters the oil station through the oil return pipeline, is cooled by the cooler and then enters the filtering device, hard granular objects are filtered and return to the steam turbine and the compressor for recycling, and various instruments are detected to guarantee the safety of the steam turbine.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and in particular to a steam turbine oil circulation filtration device. Background Technology

[0002] Steam turbines primarily use steam to drive the turbine impeller, providing power and saving electricity. They can also provide low-pressure steam after the steam has done its work. Lubricating oil is an important working medium for steam turbine units, undertaking the tasks of lubrication, regulation, cooling, and control. To ensure these tasks can be accomplished, appropriate pressure must first be maintained. During normal startup and operation, the lubricating oil pressure should be observed and adjusted, along with the differential pressure between them. The lubricating oil is stored in the oil station mainly to cool and lubricate the bearings and gearboxes, and is circulated through equipment such as coolers and filters.

[0003] Under normal conditions, the steam turbine can run continuously for 1-3 years. When the oil level in the oil station is below 70%, lubricating oil needs to be added. When the differential pressure gauge exceeds 0.15MPa, the filter device needs to be switched. Utility Model Content

[0004] To achieve the above objectives, this utility model provides a turbine oil circulation filtration device, including a turbine, a compressor, an oil station, a speed control system, a coupling, a filtration device, and a cooler. The turbine is connected to the compressor via the coupling. The turbine is equipped with a speed control system. The lubricating oil inside the turbine and compressor enters the oil station through a return oil pipeline. The oil station is equipped with an oil station filler port, an oil station vent port, a level gauge, a pressure gauge, and a temperature gauge. The oil in the oil station is transported to the filtration device through the cooler. A self-regulating valve A, an auxiliary oil pump, and a standby oil pump are installed on the pipeline between the oil station and the cooler. The filtration device includes two filter tanks with identical structures. Both filter tanks are vertically fixed on a base. Each filter tank is equipped with a filter inlet and a filter outlet. The two filter inlets are connected and equipped with a three-way valve A. The inlet of the three-way valve A is connected to the cooler. A pipeline at the inlet of the three-way valve A is equipped with... The system includes a filter inlet temperature gauge, and two filter inlets are connected by a three-way valve A. A balancing valve is installed on the connected pipeline. The two filter outlets are connected and equipped with a three-way valve B. The three-way valve B has two outlets. One outlet is connected to the turbine and compressor via a lubricating oil pipeline, and a lubricating oil pressure gauge is installed near the three-way valve B on the lubricating oil pipeline. The other outlet is connected to the speed control system via a regulating oil pipeline, and a regulating oil pressure gauge is installed near the three-way valve B on the regulating oil pipeline. A differential pressure gauge is installed between the inlet of the three-way valve A and the outlet of the three-way valve B. A self-regulating regulating valve B is installed on the regulating oil pipeline. The three-way valves A and B are linked by a cross-slider. Two pipes extend from the top of the two filter tanks and converge at one end of a vent pipe. The other end of the vent pipe is connected to an oil station. Manual valves A and B are installed on the two pipes extending from the top of the two filter tanks, respectively. A viewing window is installed at the confluence of the two pipes.

[0005] Optionally, the filter canister is provided with a filter layer consisting of a grid plate and a 100-mesh / inch filter screen. The grid plate and the 100-mesh / inch filter screen are fixedly attached by double-headed bolts. A support is vertically provided at the bottom of the filter canister, and a handle is provided at the top of the filter layer.

[0006] Optionally, the two filter canisters are also equipped with electrostatic grounding.

[0007] Compared with the prior art, the beneficial effects of this utility model are:

[0008] 1. Connect two parallel filter canisters to the oil inlet of the filter. At least one of the two filter canisters should be kept open during turbine operation. The normal differential pressure is below 0.05MPa. When the differential pressure gauge reading exceeds 0.15MPa, the filter canister needs to be switched. The filter element can be cleaned or replaced in time without affecting the operation of the turbine.

[0009] 2. Multiple 100-mesh / inch filter screens are clamped inside the upper and lower grid plates and fixed with double-headed bolts. After multiple layers of filtration, the oil is clean and free of hard particulate matter, protecting the bearings and gears of the steam turbine and compressor from wear, extending their service life, reducing failures and maintenance, and ensuring stable operation of the steam turbine.

[0010] 3. The filter device is one on and one on standby, allowing for easy switching to clean the filter screen. It also features a viewing window to observe the oil level and connects to the gas station.

[0011] 4. The lubricating oil inside the turbine and compressor enters the oil station through the return oil pipeline, is cooled by the cooler, and then enters the filter device to filter out hard particulate matter and return to the turbine and compressor for reuse. Various instruments are used for testing to ensure the safety of the turbine. Attached Figure Description

[0012] The embodiments of the turbine oil circulation filtration device of this utility model will now be described with reference to the accompanying drawings. The drawings are as follows:

[0013] Figure 1 This is a schematic diagram of the overall connection of this utility model;

[0014] Figure 2 This is a front view structural diagram of the filtration device of this utility model;

[0015] Figure 3 This is a cross-sectional view of the filter tank of this utility model;

[0016] Figure 4 This is a schematic diagram of the oil circuit switching and instrumentation structure of the filtration device of this utility model.

[0017] Attached reference numerals: 01 Steam turbine, 02 Compressor, 03 Oil station, 031 Oil station filler port, 032 Oil station vent, 033 Level gauge, 034 Pressure gauge, 035 Temperature gauge, 04 Speed ​​control system, 05 Coupling, 06 Return oil pipeline, 1 Filter tank, 11 Grating plate, 12 100 mesh / inch filter screen, 13 double-ended bolts, 14 bracket, 15 handle, 16 filter inlet, 17 filter outlet, 18 static grounding, 19 base, 2 balance valve, 21 three-way valve A, 22 three-way valve B, 23 cross slider, 3 lubricating oil line, 31 regulating oil line, 32 lubricating oil pressure gauge, 33 regulating oil pressure gauge, 34 differential pressure gauge, 35 filter inlet temperature gauge, 4 sight glass, 41 hand valve A, 42 hand valve B, 43 vent pipe, 5 cooler, 51 auxiliary oil pump, 52 standby oil pump, 53 self-regulating valve A, 54 self-regulating valve B Detailed Implementation

[0018] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0019] Secondly, it should be noted that in the description of this utility model, the terms "inner" and "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0020] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments:

[0022] refer to Figure 1-4This utility model provides a turbine oil circulation and filtration device, including a turbine 01, a compressor 02, an oil station 03, a speed control system 04, a coupling 05, a filter device, and a cooler 5. The turbine 01 is connected to the compressor 02 via the coupling 05. The turbine 01 is equipped with a speed control system 04. The lubricating oil inside the turbine 01 and the compressor 02 enters the oil station 03 through the return oil pipeline 06. The oil station 03 is equipped with an oil station filling port 031, an oil station vent port 032, a level gauge 033, a pressure gauge 034, and a temperature gauge. 035, the oil in oil station 03 is transported to the filtration device through cooler 5. A self-regulating valve A53, an auxiliary oil pump 51, and a standby oil pump 52 are installed on the pipeline between oil station 03 and cooler 5. The filtration device includes two identical filter tanks 1, both vertically fixed on base 19. Each filter tank 1 has a filter inlet 16 and a filter outlet 17. The two filter inlets 16 are connected and equipped with a three-way valve A21. The inlet of the three-way valve A21 is connected to cooler 5. The inlet of the three-way valve A21... A filter inlet temperature gauge 35 is installed on the pipeline. A three-way valve A connects the two filter inlets 16, and a balance valve 2 is installed on the connected pipeline. The two filter outlets 17 are connected and a three-way valve B22 is installed. The three-way valve B22 has two outlets. One outlet connects to the turbine 01 and compressor 02 via a lubricating oil pipeline 3. A lubricating oil pressure gauge 32 is installed on the lubricating oil pipeline 3 near the three-way valve B22. The other outlet connects to the speed control system 04 via a regulating oil pipeline 31. The regulating oil pipeline 31 is located near the three-way valve. A regulating oil pressure gauge 33 is installed at valve B22. A differential pressure gauge 34 is installed between the inlet of three-way valve A21 and the outlet of three-way valve B22. A self-regulating regulating valve B54 is installed on the regulating oil pipeline 31. Three-way valve A21 and three-way valve B22 are connected by a cross slider 23 to achieve linkage. Two pipes are led out from the top of the two filter tanks 1 and converge to one end of the vent pipe 43. The other end of the vent pipe 43 is connected to the oil station 03. Hand valves A41 and B42 are respectively installed on the two pipes led out from the top of the two filter tanks 1. A viewing window 4 is installed at the confluence.

[0023] refer to Figure 3 The filter tank 1 is equipped with a filter layer consisting of a grid plate 11 and a 100 mesh / inch filter screen 12. The 100 mesh / inch filter screen clip 12 is fixed in the upper and lower grid plates 11 with double-headed bolts 13. A support 14 is vertically installed at the bottom of the filter tank 1, and a handle 15 is installed at the top of the filter layer.

[0024] refer to Figure 2 Both filter tanks are also equipped with electrostatic grounding.

[0025] Steam turbine start-up and shutdown:

[0026] 1. Before starting the steam turbine 01, check that the oil level in the oil station 03 level gauge 033 is around 70%, the pressure inside the oil station 03 is atmospheric pressure, the oil station vent 032 is always open to the atmosphere, and the temperature is around 40℃. Check that the differential pressure of the filter device is within 0.05MPa, indicating that it is in a smooth state. Check whether the cooler 5 is unobstructed. Check whether the auxiliary oil pump A51 is effective. Check whether the connection surfaces of all pipelines and mechanical equipment are tight and reliable.

[0027] 2. First, turn on the auxiliary oil pump A51. The lubricating oil pressure gauge 32 should show 0.4 MPa, and the regulating oil pressure gauge 33 should show 0.8 MPa. This is to check for oil leaks in the turbine lubricating oil pipeline and instrumentation. Check the oil pipelines for preheating. Establish oil circulation for one hour until the oil temperature reaches approximately 40°C before starting. Start the turbine 01 in the speed control system 04. Check that the coupling 05 rotates normally without any abnormal noises or impacts. Check that all instruments are functioning properly. Once the turbine 01 has started, the turbine speed can be increased in the speed control system 04 to increase kinetic energy. Each time the speed is increased, stabilize for five minutes before increasing the speed again.

[0028] 3. When turbine 01 stops, observe carefully and gradually reduce the speed to the specified value of 500 r / min in the speed control system 04 to stop turbine 01. After ensuring that the auxiliary oil pump A51 runs stably for half an hour, stop it. Check the quality of the lubricating oil in oil station 03. The quality of the lubricating oil has a great impact on the normal operation and service life of turbine 01. Under normal circumstances, the lubricating oil is used for 2-3 years.

[0029] 4. During the process of increasing the speed of the steam turbine 01, attention should be paid to the smooth operation of the entire unit. The lubricating oil and regulating oil will decrease during the speed increase. This is due to temperature changes and the increased suction of the journal. After running smoothly for a period of time, it will return to normal.

[0030] Filter switching:

[0031] 1. During operation, the normal differential pressure between the filter inlet 16 and the filter outlet 17 is less than 0.05 MPa. When the differential pressure gauge 34 exceeds 0.15 MPa, the filter needs to be switched. The filter device is one on and one on standby (one filter tank runs with the turbine, and the other filter tank is on standby for switching).

[0032] 2. The operator first opens the balance valve 2 to allow the oil to flow to the standby filter tank, then opens the standby filter tank hand valve B42. When oil comes out of the sight glass 4, it means that the standby filter tank is full. Immediately close the hand valve B42, and the oil in the sight glass 4 will flow back to the oil station 03 through the vent pipe 43.

[0033] 3. Three-way valves A21 and B22 are connected by a cross slider 23. When the handle of three-way valve A21 is turned, the cross slider 23 drives three-way valve B22 to rotate, and the oil circuit is switched to the standby filter canister. Immediately close the balance valve 2. At this time, the standby filter canister becomes the working filter canister. The other filter canister can be opened for inspection, replacement and cleaning of the filter screen.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A turbine oil circulating filter apparatus, characterized by, The utility model discloses a turbine, compressor, oil station, speed regulation system, shaft coupling, filter device and cooler, the turbine is connected compressor through the shaft coupling, be provided with the speed regulation system on the turbine, the lubricating oil in turbine and compressor enters the oil station through the oil return pipeline, be provided with oil station oil filling port, oil station vent, liquid level meter, pressure gauge, thermometer on the oil station, the oil liquid in the oil station is transported to the filter device through the cooler, be provided with self -operated regulating valve A, auxiliary oil pump and spare oil pump on the pipeline between oil station and cooler, the filter device includes two same structure's filter jar, two filter jars are vertically fixed on the base, two filter jars are provided with filter inlet and filter outlet, two filter inlets are communicated and are provided with three -way valve A, three -way valve A inlet connects the cooler, be provided with filter inlet temperature table on the pipeline of three -way valve A inlet, two filter inlets are also connected through three -way valve A, and the pipeline of being connected is provided with balance valve, two filter outlets are communicated and are provided with three -way valve B, three -way valve B leads out two outlets, one outlet is connected turbine and compressor through lubricating oil pipeline, lubricating oil pressure gauge is set up to the position of lubricating oil pipeline near three -way valve B, another outlet is connected speed regulation system through regulating oil pipeline, and regulating oil pressure gauge is set up to the position of regulating oil pipeline near three -way valve B, be provided with pressure difference table between three -way valve A inlet and three -way valve B outlet, be provided with self -operated regulating valve B on the regulating oil pipeline, three -way valve A and three -way valve B are connected through cross slider and realize linkage, two filter jars top leads to two tubes and converges to the one end of vent pipe, the other end of vent pipe is connected to the oil station, two filter jars top leads to two tubes and is provided with hand valve A and hand valve B respectively, and the converging place is provided with a window.

2. The turbine oil circulating filter apparatus according to claim 1, characterized by, The filter jar is internally provided with a filter layer composed of a grid plate and a 100 mesh / in filter screen, the 100 mesh / in filter screen is clamped between the upper and lower grid plates and fixed by a stud bolt, a support is vertically arranged at the bottom end of the filter jar, and a handle is arranged at the top of the filter layer.

3. The turbine oil circulating filter apparatus according to claim 1, wherein, The two filter jars are also provided with electrostatic grounding.

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