Oil fume discharging system of steam turbine main oil tank

Abstract

The utility model provides a kind of oil fume discharging system of steam turbine main oil tank, belong to oil fume processing technical field, solve the problem that the backflow oil dirt mixture can contaminate main oil tank lubricating oil, cause valve and pipeline blockage and cannot continuously collect oil dirt mixture in prior art.It includes with the top of main oil tank communication's exhaust fan, exhaust fan is connected with duct air filter, duct air filter is connected with exhaust pipe, the bottom of duct air filter is connected with Y type filter, the bottom of Y type filter is connected with automatic water drainer.Set duct air filter to filter gas in main oil tank, avoid oil fume direct external pollution environment, can also collect backflow oil dirt mixture simultaneously, avoid oil dirt mixture backflow into main oil tank;Y type filter filters the iron filings in backflow oil dirt mixture, avoid blocking valve and pipeline;Automatic water drainer automatically discharges oil water, avoid manual operation.

Description

Technical Field

[0001] This utility model belongs to the field of oil fume treatment technology, specifically to an oil fume emission system for the main oil tank of a steam turbine. Background Technology

[0002] The turbine main oil tank, as a storage container for lubricating oil, is typically designed to meet the oil requirements of the unit operating at full load for 8-10 minutes. During unit operation, the main oil tank provides a continuous and stable supply of lubricating oil to the turbine bearings, transmission mechanisms, and other components via the main oil pump or auxiliary oil pump, ensuring the formation of an oil film at friction points and reducing wear.

[0003] To remove gases and water vapor from the main oil tank of a steam turbine, an exhaust fan is installed. This prevents water vapor from condensing in the tank and creates negative pressure, allowing bearing oil to flow back smoothly into the tank. However, in existing technology, the exhaust duct is too long. Hot oil fumes and water vapor in the exhaust duct easily condense into water and oil upon cooling, causing corrosion. Over time, rust and oil-water accumulate and mix in the duct, forming an oily mixture that flows back into the main oil tank, contaminating the lubricating oil and affecting the normal operation of the steam turbine generator set. Furthermore, existing technology directly installs a drain pipe and drain valve on the exhaust fan outlet duct, which is inconvenient for continuous collection of the oily mixture, and the drain valve needs to be manually opened periodically, which is time-consuming and labor-intensive. At the same time, the oily mixture contains a large amount of iron filings, which easily accumulate and cause blockages in valves and pipes, thus affecting normal wastewater discharge. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an oil fume emission system for the main oil tank of a steam turbine. A pipeline air filter is installed to filter the gas in the main oil tank, removing oil fumes and preventing direct discharge that could pollute the environment. It also collects the returned oil-water mixture, preventing it from flowing back into the main oil tank. A Y-type filter removes iron filings from the returned oil-water mixture, preventing blockage of valves and pipes. An automatic drainer automatically discharges oil and water, enabling continuous oil and water collection and eliminating the need for manual operation. Furthermore, it prevents oil fume from entering the environment where the wastewater collection tank is located, thus avoiding environmental pollution.

[0005] The technical solution adopted in this utility model is as follows: A fume emission system for a steam turbine main oil tank includes an exhaust fan connected to the top of the main oil tank. The exhaust fan is connected to a duct-type air filter via a pipe. The duct-type air filter is connected to an exhaust pipe. A Y-type filter is connected to the bottom of the duct-type air filter. An automatic drainer is connected to the bottom of the Y-type filter. The automatic drainer is connected to a sewage collection tank via a pipe.

[0006] Preferably, the duct air filter includes a vertically arranged tube shell with an air inlet and an air outlet arranged horizontally on the tube shell. A partition is provided in the tube shell to separate the air inlet and the air outlet. A first filter screen tube is fixedly connected to the partition. The first filter screen tube is vertically arranged and passes through the partition. A drain outlet is provided at the bottom of the tube shell.

[0007] Preferably, the Y-type filter includes a Y-type tube shell, a first liquid inlet is provided at the top of the Y-type tube shell, a first liquid outlet is provided at the bottom of the Y-type tube shell, and a second filter screen tube is inclinedly arranged in the Y-type tube shell, the second filter screen tube being located in the channel between the first liquid inlet and the first liquid outlet.

[0008] Preferably, the second filter tube is movably inserted into the Y-shaped tube housing, and the second filter tube is fixedly connected to a sealing cap located outside the Y-shaped tube housing, and the sealing cap is detachably connected to the Y-shaped tube housing.

[0009] Preferably, the automatic drainer includes a housing, a float ball disposed inside the housing, a second liquid inlet disposed at the top of the housing, and a second liquid outlet disposed at the bottom of the housing.

[0010] Preferably, the outer casing is provided with a manual exhaust valve.

[0011] Preferably, a manual unblocking button is provided at the bottom of the outer casing.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: A duct-type air filter is installed to filter the gas in the main oil tank, which can filter out the oil fumes in the gas and prevent the oil fumes from being directly discharged and polluting the environment. At the same time, it can also collect the returned oil mixture and prevent the oil mixture from flowing back into the main oil tank. The Y-type filter filters out iron filings in the returned oil mixture and prevents the valves and pipes from clogging. The automatic drainer automatically discharges oil and water, realizes the function of continuous oil and water collection, eliminates manual operation, and also prevents oil fume gas from entering the environment where the sewage collection tank is located and causing environmental pollution. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2A schematic diagram of the structure of the duct-type air filter provided in the embodiment of this utility model; Figure 3 This is a schematic diagram of the Y-type filter structure provided in an embodiment of the present invention; Figure 4 A schematic diagram of the automatic drainer structure provided in an embodiment of this utility model.

[0015] Attached reference numerals: 100-Main oil tank; 1-Exhaust fan; 2-Pipe air filter; 201-Pipe housing; 202-Air inlet; 203-Air outlet; 204-Baffle plate; 205-First filter screen tube; 206-Drain outlet; 3-Y-type filter; 301-Y-type pipe housing; 302-First liquid inlet; 303-First liquid outlet; 304-Second filter screen tube; 305-Sealing cover; 4-Automatic drainer; 401-Outer shell; 402-Second liquid inlet; 403-Second liquid outlet; 404-Manual exhaust valve; 405-Float ball; 406-Manual unblocking button; 5-Sewage collection tank; 6-Exhaust pipe. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] The following is combined with Figures 1-4 This utility model will be described in detail.

[0020] Example A fume emission system for a steam turbine main oil tank includes an exhaust fan 1 connected to the top of the main oil tank 100, an exhaust fan 1 connected to a duct air filter 2 via a pipe, an exhaust pipe 6 connected to the duct air filter 2, a Y-type filter 3 connected to the bottom of the duct air filter 2, an automatic drain 4 connected to the bottom of the Y-type filter 3, and a sewage collection tank 5 connected to the automatic drain 4 via a pipe.

[0021] The exhaust fan 1 draws in the mixed gas from the main oil tank 100. The mixed gas enters the duct air filter 2 for filtration, which removes the oil fumes, preventing them from being directly discharged and polluting the environment. The filtered gas is then discharged into the atmosphere through the exhaust pipe 6. The duct air filter 2 also collects the returned oil mixture, preventing it from flowing back into the main oil tank 100 and contaminating the lubricating oil. The Y-type filter 3 filters out iron filings from the returned oil mixture, preventing them from clogging valves and pipes. The automatic drainer 4 automatically discharges oil and water, enabling continuous oil and water collection and eliminating the need for manual operation. It also prevents oil fumes from entering the environment where the sewage collection tank 5 is located, thus avoiding environmental pollution.

[0022] The duct-type air filter 2 includes a vertically arranged shell 201. An inlet 202 and an outlet 203 are horizontally arranged on the shell 201. A partition 204 separates the inlet 202 and outlet 203 within the shell 201. A first filter screen tube 205 is fixedly connected to the partition 204, and the first filter screen tube 205 is vertically arranged and penetrates the partition 204. A drain outlet 206 is located at the bottom of the shell 201. The partition 204 separates the inlet 202 and outlet 203, ensuring that the mixed gas can only be filtered through the first filter screen tube 205 before being discharged into the exhaust pipe 6 through the outlet 203. The returned oil-water mixture flows into the bottom of the shell 201 through the exhaust pipe 6 and the outlet 203. The returned oil-water mixture, along with the oil and water filtered by the first filter screen tube 205, enters the Y-type filter 3 through the drain outlet 206 for further processing.

[0023] The Y-type filter 3 includes a Y-shaped housing 301. A first inlet 302 is located at the top of the Y-type housing 301, and a first outlet 303 is located at the bottom of the Y-type housing 301. A second filter screen 304 is obliquely arranged within the Y-type housing 301, situated in the channel between the first inlet 302 and the first outlet 303. The oil-sludge mixture enters the Y-type housing 301 through the first inlet 302, and after being filtered through the second filter screen 304 to remove iron filings, flows from the first outlet 303 into the automatic drain 4.

[0024] The second filter screen tube 304 is movably inserted into the Y-shaped housing 301. A sealing cap 305 is fixedly connected to the second filter screen tube 304 outside the Y-shaped housing 301, and the sealing cap 305 is detachably connected to the Y-shaped housing 301. After opening the sealing cap 305, the second filter screen tube 304 can be removed entirely for cleaning to ensure the normal operation of the Y-shaped filter 3. During operation, to prevent the Y-shaped filter 3 from becoming clogged and unable to drain oil properly, the second filter screen tube 304 should be removed and cleaned at least once a year. The sealing cap 305 can be threadedly connected to the Y-shaped housing 301.

[0025] The automatic drainer 4 includes a housing 401, a float 405 disposed within the housing 401, a second inlet 402 at the top of the housing 401, and a second outlet 403 at the bottom of the housing 401. When there is a large amount of oil and water in the housing 401, the float 405 floats due to buoyancy, thereby opening the second outlet 403. When there is a small amount of oil and water in the housing 401, the float 405 blocks the second outlet 403 due to gravity, preventing oily fumes from being discharged into the environment of the sewage collection tank 5 through the second outlet 403.

[0026] A manual vent valve 404 is provided on the outer casing 401. The manual vent valve 404 can release gas from the automatic drainer 4 to prevent air blockage from affecting the normal operation of the automatic drainer 4. The manual vent valve 404 includes a pipe with a nut threaded onto it, thereby enabling manual control for venting.

[0027] A manual drain button 406 is provided at the bottom of the outer casing 401. The manual drain button 406 can open a drain opening to discharge the impurities collected at the bottom of the automatic drain 4. The manual drain button 406 includes a movable sealing plug connected to a spring. The spring can keep the sealing plug in contact with the drain opening, keeping the drain opening closed. When it is necessary to open the drain opening, the sealing plug is pressed by the external connecting rod, causing the sealing plug to move inward, thereby opening the drain opening. At this time, the spring undergoes elastic deformation to generate elastic force. After the sealing plug is released, the spring automatically returns the sealing plug to its original position.

[0028] The duct air filter 2, Y-type filter 3, automatic drain 4, and exhaust pipe 6 are all made of stainless steel to improve corrosion resistance.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fume exhaust system for a steam turbine main oil tank, comprising an exhaust fan (1) connected to the top of the main oil tank (100), characterized in that, The exhaust fan (1) is connected to a pipe-type air filter (2) via a pipe. The pipe-type air filter (2) is connected to an exhaust pipe (6). The bottom of the pipe-type air filter (2) is connected to a Y-type filter (3). The bottom of the Y-type filter (3) is connected to an automatic drainer (4). The automatic drainer (4) is connected to a sewage collection tank (5) via a pipe.

2. The oil fume emission system for the main oil tank of a steam turbine according to claim 1, characterized in that, The duct air filter (2) includes a vertically arranged tube shell (201), an air inlet (202) and an air outlet (203) arranged horizontally on the tube shell (201), a partition (204) separating the air inlet (202) and the air outlet (203) in the tube shell (201), a first filter screen tube (205) fixedly connected to the partition (204), the first filter screen tube (205) being vertically arranged and penetrating the partition (204), and a drain outlet (206) being provided at the bottom of the tube shell (201).

3. The oil fume emission system for the main oil tank of a steam turbine according to claim 1, characterized in that, The Y-type filter (3) includes a Y-type housing (301), a first inlet (302) is provided at the top of the Y-type housing (301), a first outlet (303) is provided at the bottom of the Y-type housing (301), and a second filter tube (304) is inclinedly arranged in the Y-type housing (301), the second filter tube (304) being located in the channel between the first inlet (302) and the first outlet (303).

4. The oil fume emission system for the main oil tank of a steam turbine according to claim 3, characterized in that, The second filter tube (304) is movably inserted into the Y-shaped tube shell (301). The second filter tube (304) is fixedly connected to a sealing cap (305) located outside the Y-shaped tube shell (301). The sealing cap (305) is detachably connected to the Y-shaped tube shell (301).

5. The oil fume emission system for the main oil tank of a steam turbine according to claim 1, characterized in that, The automatic drainer (4) includes a housing (401), a float (405) is provided in the housing (401), a second liquid inlet (402) is provided at the top of the housing (401), and a second liquid outlet (403) is provided at the bottom of the housing (401).

6. The oil fume emission system for the main oil tank of a steam turbine according to claim 5, characterized in that, A manual exhaust valve (404) is provided on the outer casing (401).

7. The oil fume emission system for the main oil tank of a steam turbine according to claim 5, characterized in that, The bottom of the outer casing (401) is provided with a manual unblocking button (406).

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