Recovery device for lubricating oil smoke exhaust system of steam turbine

Abstract

A steam turbine lubricating oil smoke exhaust system recovery device comprises a recovery oil tank, a U-shaped bend and an external oil filter, an inlet of the U-shaped bend is connected with an outlet of a steam turbine lubricating oil smoke exhaust system, and an outlet of the U-shaped bend is communicated with an inlet of the recovery oil tank through a recovery oil tank oil inlet valve. An outlet of the oil recovery tank is communicated with an inlet of the external oil filter through an oil filter oil inlet valve, one path of an outlet of the external oil filter is communicated with an oil return port of the oil recovery tank through the oil filter oil inlet valve, and the other path of the outlet of the external oil filter is communicated with an oil return port of a turbine lubricating oil tank through a recovery valve. The recovery oil tank is provided with a sampling port used for detecting the quality of recovery oil in the recovery oil tank. The oil seal is formed by accumulated oil in the U-shaped bend to block oil smoke, the problem that the oil smoke comes into the steam turbine room from the outlet of the oil dirt discharging pipeline is thoroughly solved after transformation is completed, potential safety hazards are reduced, and meanwhile recycled lubricating oil returns to a lubricating oil tank of the steam turbine to be reused.

Description

Technical Field

[0001] The utility model belongs to steam turbine auxiliary equipment and relates to a steam turbine lubricating oil exhaust system recovery device. Background Art

[0002] During operation, the turbine oil in the steam turbine oil supply system is heated and decomposed into oil smoke due to the frictional power loss of the bearings and the blast of air from the rotating parts. At the same time, some water vapor leaks into the casing from the oil retaining ring of the bearing seat, causing moisture to enter the turbine oil. To ensure the quality of the turbine oil, the oil smoke and water vapor must be promptly and effectively discharged from the system.

[0003] The exhaust fan is primarily responsible for extracting smoke and vapor from the turbine bearing housing, main oil tank, and oil pipes, while maintaining a certain negative pressure within the bearing housing and oil tank to prevent smoke and vapor from entering the turbine room. The operating platform includes the oil fume separator, exhaust fan (including its associated motor), damper, piping, and oil fume separators and outlets. Technical deficiencies include: 1. Excessive oil extraction during operation; 2. When the unit is operating at high load, smoke and fume are emitted from the oil exhaust pipe outlet, causing smoke to permeate the turbine room and posing a safety hazard. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology such as large oil extraction volume and greater safety hazards, the utility model provides a turbine lubricating oil exhaust system recovery device, which uses the oil accumulated in the U-shaped bend to form an oil seal to seal the oil smoke. After the modification is completed, the problem of oil smoke emitting from the outlet of the oil exhaust pipe into the steam turbine room is completely solved, reducing safety hazards; at the same time, the recovered lubricating oil is returned to the turbine lubricating oil tank for reuse, reducing oil waste and lowering production costs.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A steam turbine lubricating oil exhaust system recovery device comprises a recovery oil tank, a U-shaped bend and an external oil filter, wherein the inlet of the U-shaped bend is connected to the outlet of the steam turbine lubricating oil exhaust system, the outlet of the U-shaped bend is connected to the inlet of the recovery oil tank through the recovery oil tank oil inlet valve, the outlet of the recovery oil tank is connected to the inlet of the external oil filter through the oil filter oil inlet valve, one path of the outlet of the external oil filter is connected to the oil return port of the recovery oil tank through the oil filter oil inlet valve, and the other path of the outlet of the external oil filter is connected to the oil return port of the steam turbine lubricating oil tank through the recovery valve, and the recovery oil tank is provided with a sampling port for detecting the quality of the recovered oil in the recovery oil tank.

[0007] Furthermore, a liquid level gauge is provided in the recovery oil tank.

[0008] Preferably, a breathing valve and a tank maintenance manhole door are provided on the top of the recovery tank.

[0009] The technical concept of the present utility model is as follows: The oil drainage pipeline of the smoke exhaust system is transformed, a U-shaped elbow and a recovery oil tank are added. When the oil level in the recovery oil tank reaches a certain height, the oil is filtered by an external oil filter and then replenished to the steam turbine lubricating oil tank (i.e., the main engine lubricating oil tank) after being qualified.

[0010] The beneficial effects of the present utility model are mainly manifested in: Using the accumulated oil in the U-shaped elbow to form an oil seal to block the oil fume. After the transformation, the problem of oil fume emitting from the outlet of the oil drainage pipeline into the turbine house is completely solved, reducing potential safety hazards; at the same time, the recovered lubricating oil is returned to the steam turbine lubricating oil tank for reuse, reducing the waste of oil products and lowering the production cost. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of a recovery device for the steam turbine lubricating oil smoke exhaust system.

[0012] Figure 2 It is a schematic diagram of the recovery oil tank. Specific Embodiments

[0013] The present utility model will be further described below in conjunction with the drawings.

[0014] Refer to Figure 1 , A recovery device for the steam turbine lubricating oil smoke exhaust system, including a recovery oil tank 1, a U-shaped elbow 2 and an external oil filter 3. The inlet of the U-shaped elbow 2 is connected to the outlet of the steam turbine lubricating oil smoke exhaust system, and the outlet of the U-shaped elbow 2 is communicated with the inlet of the recovery oil tank 1 through a recovery oil tank inlet valve F1. The outlet of the recovery oil tank 1 is communicated with the inlet of the external oil filter 3 through a filter oil inlet valve F2. One path of the outlet of the external oil filter 3 is communicated with the oil return port of the recovery oil tank 1 through a filter oil inlet valve F3, and the other path of the outlet of the external oil filter 3 is communicated with the oil return port of the steam turbine lubricating oil tank through a recovery valve F4. The recovery oil tank 1 is provided with a sampling port 4 for detecting the quality of the recovered oil in the recovery oil tank.

[0015] Furthermore, a liquid level gauge 5 is provided in the recovery oil tank 1.

[0016] Preferably, a breather valve 6 and a tank maintenance manhole door 7 are provided at the top of the recovery oil tank 1.

[0017] The solution of this embodiment modifies the oil drainage pipeline of the smoke exhaust system, adding a U-shaped elbow 2 and a recovery oil tank 1. A U-shaped elbow 2 is added before the oil drainage pipeline enters the recovery oil tank 1, and the oil accumulated in the U-shaped elbow 2 is used to form an oil seal to block the oil fume. The recovery oil tank 1 is provided with an oil tank inlet pipeline, external oil filter inlet and return oil pipelines, an oil tank maintenance manhole 7, a breather 6, a liquid level gauge 5, a sampling port 4, etc. When the oil level in the recovery oil tank 1 reaches a certain height, the oil is filtered by the external oil filter 1 and then replenished to the steam turbine lubricating oil tank (i.e., the main engine lubricating oil tank) after being qualified. The solution of this embodiment uses the oil accumulated in the U-shaped elbow to form an oil seal to block the oil fume. After the transformation, the problem of oil fume emitting into the turbine hall from the outlet of the oil drainage pipeline is completely solved, reducing potential safety hazards; at the same time, the recovered lubricating oil is returned to the steam turbine lubricating oil tank for reuse, reducing oil waste and production costs.

[0018] The content described in the embodiments of this specification is only a list of the implementation forms of the utility model concept and is only for illustrative purposes. The protection scope of the present utility model should not be regarded as limited to the specific forms stated in this embodiment. The protection scope of the present utility model also extends to equivalent technical means that can be conceived by those of ordinary skill in the art based on the utility model concept.

Claims

1. A recovery device for a steam turbine lubricating oil exhaust gas system, characterized in that, The recovery device includes a recovery oil tank, a U-shaped elbow and an external oil filter. The inlet of the U-shaped elbow is connected to the outlet of the steam turbine lubricating oil exhaust system. The outlet of the U-shaped elbow is connected to the inlet of the recovery oil tank through a recovery oil tank inlet valve. The outlet of the recovery oil tank is connected to the inlet of the external oil filter through an oil filter inlet valve. One path of the outlet of the external oil filter is connected to the oil return port of the recovery oil tank through the oil filter inlet valve. The other path of the outlet of the external oil filter is connected to the oil return port of the steam turbine lubricating oil tank through a recovery valve. The recovery oil tank is provided with a sampling port for detecting the quality of the recovered oil in the recovery oil tank.

2. The steam turbine lubricating oil exhaust gas recovery device according to claim 1, characterized in that, A liquid level gauge is provided in the recovery oil tank.

3. The steam turbine lubricating oil exhaust gas recovery device according to claim 1 or 2, characterized in that, A breathing valve and a tank maintenance manhole door are provided at the top of the recovery oil tank.

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