A purification device for exhaust pipe of main oil tank of steam turbine

Abstract

The utility model discloses a purification device for the main fuel tank smoke exhaust pipe of the steam engine, which relates to the technical field of oil and gas purification of the main fuel tank smoke exhaust pipe of the steam engine, and aims to solve the technical problem that the filter structure in the current purification device of the main fuel tank smoke exhaust pipe of the steam engine requires frequent cleaning of personnel, including a purification box, one side of the purification box is arranged with an air inlet port, and the air outlet port is arranged with a side facing away from the inlet port, and the interior of the purification box is divided into a first separation chamber and a second separation chamber by a separation plate. The interior of the first separation chamber is arranged with a first separation structure, and the first separation structure includes an external circular tube and a spiral fan, the external circular tube is arranged with an inside of the first separation chamber, the spiral fan is arranged with a side facing away from the separation plate, and the second separation chamber is arranged with a filter structure. The filter structure in the utility model has the advantage of long service life and no frequent cleaning is required.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas purification of a main oil tank exhaust pipe, and more specifically to a purification device for a steam turbine main oil tank exhaust pipe. Background Art

[0002] During the use of the steam turbine, oil and gas will be generated inside the main oil tank. In order to ensure the safety of the main oil tank, a smoke exhaust pipe is usually installed on the main oil tank to discharge the oil and gas to the outside. If the oil and gas are discharged directly into the outside, it will cause great harm to the people in the environment. After long-term inhalation into the human body, lung, liver, laryngeal cancer and other diseases will occur, and may induce chronic eye diseases, skin oil rashes, etc. Therefore, it is necessary to install a purification device on the exhaust pipe of the steam turbine main oil tank.

[0003] After searching, the Chinese utility model with application number "202021903041.9" discloses a purification device for the exhaust pipe of a steam turbine main oil tank, which includes an oil tank and a smoke exhaust pipe, and the smoke exhaust pipe is connected to the upper end of the oil tank; it is characterized in that: a smoke exhaust fan is provided in the smoke exhaust pipe; an oil mist separation chamber is provided in the smoke exhaust pipe, and an oil mist separation filter is provided in the oil mist separation chamber; the bottom surface of the oil mist separation chamber is inclined, and the bottom of the oil mist separation chamber is connected to the oil tank through an oil return pipe.

[0004] The above-mentioned documents only use metal filters, glass fiber filters and activated carbon filters to filter and recover the oil and gas discharged from the exhaust pipe of the steam turbine main oil tank. Although it can achieve a certain effect, due to the large amount of oil and gas discharged, the filter structure will be blocked and ventilated in a short time. Therefore, personnel are required to frequently clean the filter structure and ignore it. In view of this, we propose a purification device for the exhaust pipe of the steam turbine main oil tank. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, meet actual needs, and provide a purification device for a steam turbine main oil tank exhaust pipe to solve the technical problem that the filtering structure in the current purification device for the steam turbine main oil tank exhaust pipe requires frequent cleaning by personnel.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a purification device for a smoke exhaust pipe of a steam turbine main oil tank, comprising a purification box, an air inlet port is arranged on one side of the purification box, an air outlet port is arranged on the side of the purification box facing away from the air inlet port, the interior of the purification box is divided into a first separation chamber and a second separation chamber by a separation plate, a first separation structure is arranged inside the first separation chamber, the first separation structure comprises an external circular tube and a spiral fan, the external circular tube is arranged inside the first separation chamber, the spiral fan is arranged on the side of the external circular tube facing away from the separation plate, a filtering structure is arranged inside the second separation chamber, and the inner bottom ports of the first separation chamber and the second separation chamber are connected with a three-way pipe;

[0007] A plurality of groups of built-in round tubes are equidistantly arranged inside the external round tube via a connecting block, and the built-in round tubes are arranged in a form of being nested in sequence, and gaps are reserved between adjacent built-in round tubes.

[0008] The utility model designs a first separation chamber and a second separation chamber, and a first separation structure is arranged inside the first separation chamber. Therefore, the oil and gas discharged from the exhaust pipe of the main oil tank of the steam turbine enter the first separation structure of the first separation chamber, and the oil and gas are spirally guided under the action of the spiral fan, so that the oil and gas flow inside the external circular tube in a spiral centrifugal state, and the oil and gas will hit the inner wall of the external circular tube, and oil droplets are gradually formed on the inner wall of the external circular tube, and then the first separation of the oil and gas is realized, which can greatly reduce the oil content in the oil and gas. The oil and gas after the first oil and gas separation enter the second separation chamber, and then the filtering structure performs a second oil and gas separation on the oil and gas, so it can be used in the When the oil and gas that have passed the first oil and gas separation enters the second separation chamber for secondary oil and gas separation and recovery, the oil and gas separation load of the filter structure in the second separation chamber can be greatly reduced, thereby extending the service life of the filter structure, eliminating the need to frequently clean the filter structure, and improving the performance of the device. The centrifugal oil and gas can pass through the gaps between multiple groups of built-in circular tubes, thereby greatly increasing the contact area between the oil and gas and the inside of the external circular tube, and thus being able to separate the oil component in the oil and gas to a greater extent, thereby better reducing the subsequent load of the filter structure on oil and gas separation, further increasing the service life of the filter structure, and reducing the cleaning frequency of the filter structure.

[0009] Preferably, a circular through hole is opened at the center of the separation plate, and the circular through hole is connected to the port of the external circular tube, and the port of the external circular tube facing away from the separation plate is connected to the air inlet port.

[0010] Preferably, a partition is arranged at the inner bottom of the second separation chamber, two groups of welding strips are arranged on the top of the partition, and the two groups of welding strips are arranged symmetrically with the filtering structure, and a rectangular through hole is opened on the side of the top of the partition facing away from the air outlet.

[0011] Preferably, an oil outlet hole is provided at a side of the bottom of the external circular tube facing the air inlet port, and the external circular tube is arranged obliquely.

[0012] Preferably, a first funnel is arranged at the inner bottom of the first separation chamber, and a second funnel is arranged inside the second separation chamber below the partition, and the bottom output ends of the first funnel and the second funnel are both connected to a three-way pipe.

[0013] Preferably, the spiral fan includes a mounting frame, a motor and fan blades, the mounting frame is arranged inside the external circular tube, the motor is arranged at the center of one side of the mounting frame, and the fan blades are arranged on the rotating shaft at the output end of the motor.

[0014] Preferably, an opening is provided at the top of the second separation chamber, and the filtering structure comprises a T-shaped frame, which is inserted into the second separation chamber through the opening, and a metal filter screen, a glass fiber filter screen and an activated carbon filter screen are arranged in sequence from left to right inside the T-shaped frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model designs a first separation chamber and a second separation chamber, and a first separation structure is arranged inside the first separation chamber. Therefore, the oil and gas discharged from the exhaust pipe of the main oil tank of the steam turbine enter the first separation structure of the first separation chamber, and the oil and gas are spirally guided under the action of the spiral fan, so that the oil and gas flow inside the external circular tube in a spiral centrifugal state, and the oil and gas will hit the inner wall of the external circular tube, and oil droplets will gradually form on the inner wall of the external circular tube, and then the first separation of the oil and gas is realized, which can greatly reduce the oil content in the oil and gas. After the first oil and gas separation, the oil and gas enter the second separation chamber. , and then the filter structure performs secondary oil-gas separation on the oil and gas. Therefore, when the oil and gas that have undergone the first oil-gas separation enter the second separation chamber for secondary oil-gas separation and recovery, the oil-gas separation load of the filter structure in the second separation chamber can be greatly reduced, thereby extending the service life of the filter structure, eliminating the need for frequent cleaning of the filter structure, improving the performance of the device, and solving the technical problem that the filter structure in the current steam turbine main oil tank exhaust pipe purification device requires frequent cleaning by personnel. Therefore, the filter structure in the utility model has the advantages of long service life and no need for frequent cleaning.

[0017] 2. The utility model also arranges a plurality of groups of internal circular tubes at equal intervals inside the external circular tube, and the internal circular tubes are in the form of being nested in sequence, and there is a ventilation gap between each two adjacent groups of internal circular tubes. Therefore, centrifugal oil and gas can pass through the gaps between the plurality of groups of internal circular tubes, thereby greatly increasing the contact area between the oil and gas and the inside of the external circular tube, so that the oil component in the oil and gas can be separated to a greater extent, thereby better reducing the subsequent load of the filter structure on oil and gas separation, further increasing the service life of the filter structure, and reducing the cleaning frequency of the filter structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the first overall cross-sectional structure of the utility model;

[0020] Figure 3 It is a second overall cross-sectional structural schematic diagram of the utility model;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of the first separation structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the filtering structure of the present utility model.

[0023] Description of the numbers in the figure:

[0024] 1. Purification box; 101. First separation chamber; 102. Second separation chamber; 103. Air inlet port; 104. Air outlet port; 2. Separation plate; 201. Circular through hole; 3. Partition plate; 301. Rectangular through hole; 302. Welding strip; 4. First separation structure; 5. External circular tube; 501. Internal circular tube; 502. Connecting block; 503. Oil outlet hole; 6. Spiral fan; 601. Mounting frame; 602. Motor; 603. Fan blade; 7. Filter structure; 701. T-shaped frame; 702. Metal filter; 703. Glass fiber filter; 704. Activated carbon filter; 8. First funnel; 9. Second funnel; 10. Three-way pipe. DETAILED DESCRIPTION

[0025] like Figures 1 to 5As shown, the utility model relates to a purification device for a smoke exhaust pipe of a steam turbine main oil tank, comprising a purification box body 1, an air inlet port 103 is arranged on one side of the purification box body 1, an air outlet port 104 is arranged on the side of the purification box body 1 facing away from the air inlet port 103, the interior of the purification box body 1 is divided into a first separation chamber 101 and a second separation chamber 102 by a separation plate 2, a first separation structure 4 is arranged inside the first separation chamber 101, the first separation structure 4 comprises an external circular tube 5 and a spiral fan 6, the external circular tube 5 is arranged inside the first separation chamber 101, the spiral fan 6 is arranged on the side of the external circular tube 5 facing away from the separation plate 2, a filtering structure 7 is arranged inside the second separation chamber 102, the inner bottom ports of the first separation chamber 101 and the second separation chamber 102 are connected with a three-way pipe 10, the oil and gas discharged from the smoke exhaust pipe of the steam turbine main oil tank enters the external circular tube 5 of the first separation structure 4 of the first separation chamber 101 through the air inlet port 103, and the oil and gas are filtered under the action of the spiral fan 6. The spiral guide makes the oil and gas flow in the external circular tube 5 in a spiral centrifugal state. The oil and gas will hit the inner wall of the external circular tube 5, and oil droplets will gradually form on the inner wall of the external circular tube 5, and then the first separation of the oil and gas will be realized, which can greatly reduce the oil content in the oil and gas. The oil and gas after the first oil and gas separation enter the second separation chamber 102, and then the filter structure 7 performs secondary oil and gas separation on the oil and gas. Therefore, when the oil and gas after the first oil and gas separation enter the second separation chamber 102 for secondary oil and gas separation and recovery, the oil and gas separation load of the filter structure 7 in the second separation chamber 102 can be greatly reduced, thereby extending the service life of the filter structure 7, without the need to frequently clean the filter structure 7, and improving the performance of the device. The filter structure 7 filters and purifies the oil and gas, and then discharges it from the air outlet port 104, and the oil separated by the first separation chamber 101 and the second separation chamber 102 is discharged through the three-way pipe 10, which can be recovered separately or directly connected to the main oil tank of the steam turbine;

[0026] Specifically, a circular through hole 201 is opened in the center of the separation plate 2, and the circular through hole 201 is connected to the port of the external circular tube 5. The port of the external circular tube 5 facing away from the separation plate 2 is connected to the air inlet port 103. The circular through hole 201 facilitates the oil and gas separated once to enter the second separation chamber 102.

[0027] Furthermore, a partition 3 is arranged at the inner bottom of the second separation chamber 102, and two groups of welding strips 302 are arranged on the top of the partition 3, and the two groups of welding strips 302 are symmetrically arranged with the filtering structure 7. A rectangular through hole 301 is opened on the side of the top of the partition 3 that is away from the air outlet port 104. When the filtering structure 7 is installed, the bottom of the filtering structure 7 is inserted into the clamping groove formed by the two groups of welding strips 302 to limit and fix the filtering structure 7. The oil filtered and separated by the filtering structure 7 flows into the space below the partition 3 of the second separation chamber 102 through the rectangular through hole 301.

[0028] Furthermore, an oil outlet hole 503 is opened at the bottom of the external circular tube 5 on one side facing the air inlet port 103. The external circular tube 5 is arranged at an angle, and the oil separated inside the external circular tube 5 will flow to the oil outlet hole 503 and then be discharged into the lower space inside the first separation chamber 101.

[0029] It is worth noting that a first funnel 8 is arranged at the inner bottom of the first separation chamber 101, and a second funnel 9 is arranged inside the second separation chamber 102 below the partition 3. The bottom output ends of the first funnel 8 and the second funnel 9 are connected to the three-way pipe 10. The oil separated by the first separation chamber 101 enters the first funnel 8, and the oil separated by the second separation chamber 102 enters the second funnel 9. Then the separated oil is collected by the first funnel 8 and the second funnel 9, and finally discharged through the three-way pipe 10.

[0030] It is worth mentioning that the spiral fan 6 includes a mounting frame 601, a motor 602 and a fan blade 603. The mounting frame 601 is arranged inside the external circular tube 5, the motor 602 is arranged at the center of one side of the mounting frame 601, and the fan blade 603 is arranged on the rotating shaft at the output end of the motor 602. The motor 602 can drive the fan blade 603 to rotate, so that the oil and gas entering the purification box 1 can flow in the external circular tube 5 in a centrifugal state.

[0031] It is worth mentioning that an opening is provided at the top of the second separation chamber 102, and the filtering structure 7 includes a T-shaped frame 701, which is inserted into the second separation chamber 102 through the opening, and a metal filter 702, a glass fiber filter 703 and an activated carbon filter 704 are arranged in sequence from left to right inside the T-shaped frame 701. The T-shaped frame 701 is inserted and installed into the second separation chamber 102 through the opening, and the metal filter 702 performs preliminary filtration, the glass fiber filter 703 performs fine filtration on the oil and gas, and the activated carbon filter 704 removes the impurities in the oil and gas.

[0032] In an embodiment of the utility model, a plurality of groups of built-in circular tubes 501 are equidistantly arranged inside the external circular tube 5 through a connecting block 502, and the built-in circular tubes 501 are arranged in a form of sequential nesting, and gaps are reserved between adjacent built-in circular tubes 501. Centrifugal oil and gas can pass through the gaps between multiple groups of built-in circular tubes 501, thereby greatly increasing the contact area between the oil and gas and the inside of the external circular tube 5, and thus can separate the oil component in the oil and gas to a greater extent, thereby better reducing the content of oil and gas in the oil and gas entering the second separation chamber 102, thereby reducing the subsequent load of the filter structure 7 on oil and gas separation, further increasing the service life of the filter structure 7, and reducing the cleaning frequency of the filter structure 7.

[0033] Working principle: This embodiment provides a purification device for the exhaust pipe of the main oil tank of the steam turbine. First, the oil and gas discharged from the exhaust pipe of the main oil tank of the steam turbine enters the external circular tube 5 of the first separation structure 4 of the first separation chamber 101 through the air inlet port 103. Under the action of the spiral fan 6, the oil and gas are spirally guided to flow inside the external circular tube 5 in a spiral centrifugal state. The oil and gas will hit the inner wall of the external circular tube 5, and oil droplets will gradually form on the inner wall of the external circular tube 5. Then, the first separation of the oil and gas is realized, which can greatly reduce the oil content in the oil and gas. After the first oil and gas separation, the oil and gas enter the second separation chamber 102, and then pass through The filter structure 7 performs secondary oil-gas separation on the oil and gas. Therefore, when the oil and gas that have undergone the first oil-gas separation enter the second separation chamber 102 for secondary oil-gas separation and recovery, the oil-gas separation load of the filter structure 7 in the second separation chamber 102 can be greatly reduced, thereby extending the service life of the filter structure 7, eliminating the need to frequently clean the filter structure 7, and improving the performance of the device. The filter structure 7 filters and purifies the oil and gas, and then discharges it from the air outlet port 104. The oil separated from the first separation chamber 101 and the second separation chamber 102 is discharged through the three-way pipe 10, and can be recovered separately or directly connected to the main oil tank of the steam turbine.

[0034] Secondly, the centrifugal oil and gas can pass through the gaps between the multiple groups of built-in circular tubes 501, thereby greatly increasing the contact area between the oil and gas and the inside of the external circular tube 5, and thus being able to separate the oil component in the oil and gas to a greater extent, thereby being able to better reduce the content of oil in the oil and gas entering the second separation chamber 102, thereby reducing the subsequent load of the filter structure 7 on oil and gas separation, further increasing the service life of the filter structure 7, and reducing the cleaning frequency of the filter structure 7.

[0035] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A purification device for exhaust pipe of main oil tank of steam turbine, characterized in that: The invention comprises a purification box (1), wherein an air inlet port (103) is arranged on one side of the purification box (1), and an air outlet port (104) is arranged on the side of the purification box (1) opposite to the air inlet port (103); the interior of the purification box (1) is divided into a first separation chamber (101) and a second separation chamber (102) by a separation plate (2); a first separation structure (4) is arranged inside the first separation chamber (101); the first separation structure (4) comprises an external circular tube (5) and a spiral fan (6); the external circular tube (5) is arranged inside the first separation chamber (101); the spiral fan (6) is arranged inside the external circular tube (5) on the side opposite to the separation plate (2); a filtering structure (7) is arranged inside the second separation chamber (102); and inner bottom ports of the first separation chamber (101) and the second separation chamber (102) are connected to a three-way pipe (10); A plurality of groups of internal circular tubes (501) are arranged at equal intervals inside the external circular tube (5) via a connecting block (502), and the internal circular tubes (501) are arranged in a sequentially nested manner, with gaps reserved between adjacent internal circular tubes (501).

2. The device for purifying the exhaust pipe of a main oil tank of a steam turbine according to claim 1, characterized in that: A circular through hole (201) is provided at the center of the separation plate (2), the circular through hole (201) is connected to the port of the external circular tube (5), and the port of the external circular tube (5) facing away from the separation plate (2) is connected to the air inlet port (103).

3. The purification device for exhaust pipe of main oil tank of steam turbine according to claim 1 is characterized in that: A partition (3) is arranged at the inner bottom of the second separation chamber (102), two groups of welding strips (302) are arranged on the top of the partition (3), and the two groups of welding strips (302) are arranged symmetrically with the filtering structure (7), and a rectangular through hole (301) is opened on the side of the top of the partition (3) facing away from the air outlet port (104).

4. The purification device for exhaust pipe of main oil tank of steam turbine according to claim 1 is characterized in that: An oil outlet hole (503) is provided at the bottom of the external circular tube (5) on one side facing the air inlet port (103), and the external circular tube (5) is arranged in an inclined manner.

5. The purification device for exhaust pipe of main oil tank of steam turbine according to claim 1 is characterized in that: A first funnel (8) is arranged at the inner bottom of the first separation chamber (101), and a second funnel (9) is arranged inside the second separation chamber (102) below the partition (3); the bottom output ends of the first funnel (8) and the second funnel (9) are both connected to a three-way pipe (10).

6. The device for purifying the exhaust pipe of a main oil tank of a steam turbine according to claim 1, characterized in that: The spiral fan (6) comprises a mounting frame (601), a motor (602) and a fan blade (603); the mounting frame (601) is arranged inside the external circular tube (5); the motor (602) is arranged at the center of one side of the mounting frame (601); and the fan blade (603) is arranged on a rotating shaft at the output end of the motor (602).

7. The device for purifying the exhaust pipe of a main oil tank of a steam turbine according to claim 1, characterized in that: The second separation chamber (102) is provided with an opening at the top, and the filtering structure (7) comprises a T-shaped frame (701), and the T-shaped frame (701) is inserted into the second separation chamber (102) through the opening, and a metal filter screen (702), a glass fiber filter screen (703) and an activated carbon filter screen (704) are arranged in sequence from left to right inside the T-shaped frame (701).

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