CN217367709U

CN217367709U - Oil smoke separating and discharging device of industrial steam turbine compressor unit

Info

Publication number: CN217367709U
Application number: CN202123402463.5U
Authority: CN
Inventors: 常怀春; 万树文; 王洪振; 刘学治; 臧安华
Original assignee: Shandong Hualu Hengsheng Chemical Co Ltd
Current assignee: Shandong Hualu Hengsheng Chemical Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-09-06
Anticipated expiration: 2031-12-31

Abstract

An oil-smoke separating and discharging device of an industrial steam turbine compressor unit comprises an oil return pipeline, a closed oil return box, an oil-smoke filtering device, a gas ejector, an air cooler and a cyclone gas-liquid separator; one end of the oil return pipeline is connected with an oil return discharge port of a bearing chamber of the compressor unit, and the other end of the oil return pipeline is connected with an oil return box; the oil return box is connected with a protective nitrogen supply pipe; the oil fume filtering device is arranged at the upper part of the oil return box, and the outlet end of the oil fume filtering device is connected with the negative pressure inlet end of the gas injector; the driving inlet end of the gas ejector is connected with a driving nitrogen gas supply pipe, and the outlet end of the gas ejector is sequentially connected with an air cooler and a cyclone gas-liquid separator through pipelines; the gas phase outlet end of the cyclone gas-liquid separator is connected with an oil fume discharge pipe led to the air, and the liquid phase outlet end of the cyclone gas-liquid separator is connected with an oil return box through a liquid collecting pipe. Therefore, the oil smoke can improve the oil smoke separation efficiency through filtering, cooling and cyclone separation, and the oil smoke can be prevented from contacting with air under the drive of nitrogen gas to prevent deflagration and prolong the service life of recovered lubricating oil.

Description

Oil smoke separating and discharging device of industrial steam turbine compressor unit

Technical Field

The utility model belongs to the technical field of the oil smoke separation technique of industrial steam turbine compressor unit and specifically relates to an oil smoke separation discharging equipment of industrial steam turbine compressor unit is related to.

Background

The lubricating mode of the industrial steam turbine compressor unit is generally a forced lubricating mode, a circulating centralized oil supply device is mounted in a matched mode to provide lubricating oil for a supporting bearing, a thrust bearing, a gear box and the like in a bearing chamber, heat generated in the mechanical operation process is transferred to an oil return box by means of the lubricating oil, and the oil return temperature of the oil return box is generally 50-60 ℃. Lubricating oil can form the oil smoke at mechanical operation intensification in-process, and still can mix with small carbonization granule, not only can influence the negative pressure that returns the oil tank, makes the smooth and easy nature of oil return not good, and if the oil smoke is discharged through not cooling down moreover, along with the extension of operating time, the end of oil smoke delivery pipe is very easily appeared the condensation oil and is dripped, serious polluted environment and can increase the oil loss.

The operation principle of the existing oil fume separator mainly aims at ensuring oil return smoothness or oil return box negative pressure, and mainly adopts a layout structure combining a common filter element and an axial flow fan, so that the structure has poor oil fume filtering effect, and the oil fume cannot be coalesced and separated. Although the present high-efficiency coalescence type oil fume separator can realize the coalescence separation function of oil fume, the separation effect of the separator gradually becomes worse along with the extension of the operation time, oil drops also appear at the tail end of an oil fume discharge pipe, and a blower is required to replace a filter element. In addition, in the oil smoke separation process, high-temperature oil smoke in the oil return box is usually filtered without being cooled, the high-temperature oil smoke is easily condensed into oil drops at the tail end or the low point of the oil smoke discharge pipe after being gradually cooled by the external environment, and the oil drops are easy to form oil marks on the ground and cause great pollution to the environment.

In addition, the flammable and explosive compressor set usually adopts a shaft end sealing technology such as dry gas sealing to prevent flammable and explosive media from leaking from the shaft end of the compressor, and once the sealing fails, the flammable and explosive media easily enter an oil return tank to form an explosive environment. And the bearing room oil smoke delivery pipe of current industrial steam turbine compressor unit generally is the formula of discharging alone, and the oil return case negative pressure is crossed low or the oil level all leads to the air to take place through the condition that the bearing room oil smoke delivery pipe got into to the oil return case when fluctuating by a wide margin appears, can make the oil return case form explosive environment equally, causes serious threat for industrial steam turbine compressor unit's safe operation, and can't satisfy the requirement of current strict safety management and control.

Therefore, how to improve the oil-smoke separation efficiency of the industrial steam turbine compressor unit to realize long-term clean emission of the separated oil smoke, and how to prevent the oil smoke from contacting with air in the oil-smoke separation process to avoid oxidation of the recovered lubricating oil and avoid oil smoke deflagration, has become one of the technical problems to be solved in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the technical scheme is how to improve the oil smoke separation efficiency of the industrial steam turbine compressor unit and prevent oil smoke from contacting with air in the oil smoke separation process.

In order to solve the technical problem, the technical scheme provides an oil-smoke separating and discharging device of an industrial steam turbine compressor unit, which comprises: the oil return device comprises an oil return pipeline, an oil return box in a closed shape, an oil smoke filtering device, a gas ejector, an air cooler and a cyclone gas-liquid separator; one end of the oil return pipeline is connected with an oil return discharge port of a bearing chamber of the industrial steam turbine compressor unit, and the other end of the oil return pipeline is connected with an oil return box; the oil return box is connected with a protective nitrogen supply pipe; the oil fume filtering device is arranged on the upper part of the oil return box, and the outlet end of the oil fume filtering device is connected with the negative pressure inlet end of the gas ejector through a pipeline; the driving inlet end of the gas ejector is connected with a driving nitrogen supply pipe, and the outlet end of the gas ejector is connected with the inlet end of the air cooler through a pipeline; the outlet end of the air cooler is connected with the inlet end of the cyclone gas-liquid separator through a pipeline; the gas phase outlet end of the cyclone gas-liquid separator is connected with an oil fume discharge pipe led to the air, and the liquid phase outlet end of the cyclone gas-liquid separator is connected with an oil return box through a liquid collecting pipe. Therefore, the oil fume filtering device can effectively filter and separate the fine oil drops in the oil fume, and the air cooler can reduce the temperature of the high-temperature oil fume sprayed out from the outlet end of the gas ejector to the atmospheric environment temperature so as to facilitate the more thorough gas-liquid separation of the oil fume in the cyclone gas-liquid separator, thereby improving the oil fume separation efficiency; and nitrogen gas can effectively prevent the oil smoke from contacting with air as protective gas and driving gas in the oil smoke separation process, thereby preventing the recovered lubricating oil from being oxidized and avoiding the oil smoke deflagration condition.

In another embodiment of the present invention, the soot filtering device is formed by connecting a primary filter and a coalescing filter group in series through a pipe, the primary filter is disposed above the inside of the oil return tank, an outlet end of the primary filter is connected to an inlet end of the coalescing filter group located above the outer side of the upper sidewall of the oil return tank through a pipe penetrating the upper sidewall of the oil return tank, and an outlet end of the coalescing filter group is connected to a negative pressure inlet end of the gas ejector through a pipe. Therefore, through the multistage filtration of primary filtration and coalescence separation filtration, the oil smoke filtration and separation can be more thorough, and the oil smoke separation efficiency can be improved.

As another implementation of the technical scheme, the primary filter is formed by combining a suction layer positioned at the lower layer and a filter layer positioned at the upper layer, and the upper part of the filter layer is provided with an outlet end.

As another implementation of this solution, the intake layer is constituted by a perforated plate and the filter layer is constituted by a wire mesh demister.

In another embodiment of the present invention, the coalescing filter group includes two coalescing filters arranged in parallel and two oil drain pipes connected between the two coalescing filters and the oil return tank, respectively, the outlet ends of the primary filters are connected to the inlet ends of the two coalescing filters through pipes penetrating the upper sidewall of the oil return tank, respectively, and the outlet ends of the two coalescing filters are connected to the negative pressure inlet end of the gas ejector through a pipe.

In another embodiment of the present disclosure, valves are provided on the pipes at the inlet ends of the two coalescing filters and/or on the pipes at the outlet ends of the two coalescing filters. One of the two coalescence type filters can be in a use state and the other coalescence type filter can be in a standby state through the control of the valve, so that the filter element can be replaced under the state of not stopping operation, and the efficient and continuous operation working state of the oil fume separation and discharge device is ensured.

In a further embodiment of the invention, the drainage pipe is a serpentine pipe with two bends, so that automatic drainage of the coalescing filter to the return tank is achieved.

As another implementation of the technical solution, a negative pressure self-control valve set is disposed on the driving nitrogen gas supply pipe, and the negative pressure self-control valve set monitors the pressure in the oil return tank to control the degree of communication between the driving inlet end of the gas injector and the driving nitrogen gas supply pipe. Therefore, the negative pressure in the oil return tank can be kept constant, so that stable suction of oil smoke generated in the bearing chamber is ensured. When the oil smoke amount in the bearing chamber is reduced, the driving nitrogen amount can be reduced by reducing the communication degree of the driving inlet end of the gas injector and the driving nitrogen supply pipe, so that the pumping strength of the gas injector to the oil smoke in the oil return tank is reduced; when the oil smoke amount of the bearing chamber is increased, the driving nitrogen amount can be increased by increasing the communication degree of the driving inlet end of the gas injector and the driving nitrogen supply pipe, so that the suction strength of the gas injector to the oil smoke in the oil return tank is improved, and the stable operation of the oil smoke separation and discharge device is ensured.

As another implementation of the technical solution, the negative pressure automatic control valve set is composed of a regulating valve, a controller and a pressure monitor, the regulating valve is disposed on the driving nitrogen supply pipe, the pressure monitor is disposed on the oil return tank, the controller is electrically connected to the regulating valve and the pressure monitor respectively, and the controller controls the opening degree of the regulating valve according to the pressure in the oil return tank monitored by the pressure monitor.

As another implementation of this technical solution, this oil smoke separating and discharging device of industrial steam turbine compressor unit still includes: one end of the oil fume gas collecting pipeline is connected with an oil fume discharge port of the bearing chamber, the other end of the oil fume gas collecting pipeline is led into the air to form a high-point emptying end, and the anti-reverse-suction component is arranged at the high-point emptying end. When the bearing chamber produces a large amount of oil smoke, a small amount of oil smoke can be discharged from the high-point emptying end through the oil smoke gas collecting pipeline, and the anti-reverse-suction assembly is arranged at the high-point emptying end, so that air can be prevented from entering the bearing chamber and the oil return box through the oil smoke gas collecting pipeline, and the contact between the oil smoke and the air is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the oil-smoke separating and discharging device of the industrial steam turbine compressor unit.

Symbolic description in the drawings:

1 bearing chamber; 2, an oil return pipeline; 3 an oil return tank; 4, an oil fume filtering device; 41 a primary filter; 42 a coalescing filter; 43 an oil drain pipe; a valve 44; 5, a gas injector; 6 an air cooler; 7 cyclone gas-liquid separator; 71 a lampblack discharge pipe; 72 a liquid collecting pipe; 8 protecting a nitrogen gas supply pipe; 9 driving the nitrogen gas supply pipe; 91 negative pressure self-control valve group; 10 oil fume gas collecting pipeline; 101, high point emptying end; 102 prevent suck back of the components.

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.

As shown in fig. 1, it is a specific embodiment of the oil smoke separating and discharging device of the industrial steam turbine compressor set of the present invention. The oil smoke separating and discharging device (hereinafter referred to as oil smoke separating and discharging device) of the industrial steam turbine compressor unit of the embodiment comprises: an oil return pipeline 2, an enclosed oil return box 3, an oil smoke filtering device 4, a gas ejector 5, an air cooler 6 and a cyclone gas-liquid separator 7. The oil return pipeline 2 is composed of a plurality of pipelines, one end of each pipeline is respectively connected with an oil return discharge port of each bearing chamber 1 of the industrial steam turbine compressor unit, and the other ends of the pipelines are converged and connected together and are commonly connected with an oil return box 3. The return tank 3 is connected to a protective nitrogen gas supply pipe 8 to supply nitrogen protective gas into the return tank 3. The oil smoke filtering device 4 is arranged on the upper part of the oil return box 3, the outlet end of the oil smoke filtering device 4 is connected with the negative pressure inlet end of the gas ejector 5 through a pipeline, the driving inlet end of the gas ejector 5 is connected with a driving nitrogen gas supply pipe 9, the driving nitrogen gas supply pipe 9 can provide 0.45-1.0 MPaG of nitrogen as a driving gas source, the outlet end of the gas ejector 5 is connected with the inlet end of the air cooler 6 through a pipeline, the outlet end of the air cooler 6 is connected with the inlet end of the cyclone gas-liquid separator 7 through a pipeline, and the direction of the oil smoke inlet (not shown) at the inlet end of the cyclone gas-liquid separator 7 is tangential to the inner side wall of the cyclone gas-liquid separator 7, the gas phase outlet end at the upper part of the cyclone gas-liquid separator 7 is connected with an oil smoke discharge pipe 71 leading to the air, and the liquid phase outlet end at the lower part of the cyclone gas-liquid separator 7 is connected with the oil return tank 3 through a liquid collection pipe 72. The gas ejector 5 is driven by nitrogen input by a driving nitrogen gas supply pipe 9 to generate negative pressure (about-2 to-1 KPaG) in the oil return box 3, so as to suck high-temperature oil smoke generated in a bearing chamber 1 of an industrial steam turbine compressor unit, the high-temperature oil smoke entering the oil return box 3 under the suction action is mixed with the nitrogen input by a protective nitrogen gas supply pipe 8, then the mixture is filtered by an oil smoke filtering device 4 to ensure that most oil drops in the oil smoke are filtered and retained in the oil return box 3, then the high-temperature oil smoke enters the gas ejector 5 and is mixed with the driving nitrogen and then is sprayed into an air cooler 6 to be cooled, so that the temperature of the high-temperature oil smoke is reduced to the atmospheric environment temperature to facilitate the condensation of the oil drops, then the cooled oil smoke enters a cyclone gas-liquid separator 7 to carry out the high-efficiency separation of the oil smoke and the oil drops, and the separated gas phase gas is discharged at a high point through an oil smoke discharge pipe 71, the separated oil droplets flow back to the oil return tank 3 through the header pipe 72. In the above-mentioned suction, filtration, cooling and the separation process to the oil smoke, owing to regard nitrogen gas as protective gas and drive gas, can effectively prevent oil smoke and air contact to prevent that the lubricating oil of retrieving from being oxidized, can prevent the emergence of the oil smoke detonation condition moreover. In addition, the connecting end of the oil return pipeline 2 and the oil return tank 3 is extended into the lower part of the oil return tank 3, so that the high-temperature oil and smoke sucked into the oil return tank 3 can be stably separated from the oil smoke. And the bottom of the oil return tank 3 is designed to be inclined so as to settle and concentrate tiny carbonized particles in the recovered lubricating oil.

More specifically, the soot filter 4 is constituted by a primary filter 41 and a coalescing filter group connected in series by a pipe. The primary filter 41 is disposed above the oil return tank and is formed by combining a suction layer (not shown) located at a lower layer and a filter layer (not shown) located at an upper layer, the suction layer can be made of a porous plate, the filter layer can be made of a wire mesh demister, and the upper portion of the wire mesh demister is connected to a pipeline penetrating through the upper side wall of the oil return tank 3 to serve as an outlet end of the primary filter 41. The coalescing filter group is composed of two coalescing filters 42 arranged in parallel and two oil discharge pipes 43 respectively connected between the two coalescing filters 42 and the oil return tank 3, a high-efficiency coalescing and separating filter element is arranged in the coalescing filter 42 to realize filtering, coalescing and separating of oil smoke, the outlet end of the primary filter 41 is respectively connected with the inlet ends of the two coalescing filters 42 through a pipeline penetrating through the upper side wall of the oil return tank 3, and the outlet ends of the two coalescing filters 42 are commonly connected with the negative pressure inlet end of the gas ejector 5 through a pipeline. Through the multistage filtration of primary filtration and coalescence separation filtration, can make the oil smoke filtration separation more thorough to promote the efficiency of oil smoke separation. The drain pipe 43 may, in turn, be formed by a serpentine pipe having two bends, in order to achieve automatic drainage of the coalescing filter 42 to the return tank 3. In addition, valves 44 may be provided on the pipes at the inlet ends of the two coalescing filters 42 and/or on the pipes at the outlet ends of the two coalescing filters 42, and one of the two coalescing filters 42 may be in a use state and the other may be in a standby state by controlling the closing and opening of the valves 44, so as to realize the filter element replacement without stopping the operation, thereby ensuring the efficient and continuous operation of the soot separation and discharge device.

In this embodiment, the driving nitrogen gas supply pipe 9 may further be provided with a negative pressure self-control valve group 91, and the negative pressure self-control valve group 91 may monitor the pressure inside the oil return tank 3 to control the degree of communication between the driving inlet end of the gas injector 5 and the driving nitrogen gas supply pipe 9, so as to keep the negative pressure inside the oil return tank 3 constant, thereby ensuring stable suction of the oil smoke generated in the bearing chamber 1. The negative pressure self-control valve group 91 may be composed of a regulating valve (not shown), a controller (not shown) and a pressure monitor (not shown), wherein the regulating valve is disposed on the driving nitrogen gas supply pipe, the pressure monitor is disposed on the oil return tank, the controller is electrically connected to the regulating valve and the pressure monitor, and the controller controls the opening degree of the regulating valve according to the pressure in the oil return tank monitored by the pressure monitor. The controller can select a programmable logic controller to set a threshold value and a trigger condition, perform logic judgment, send an instruction and the like, and is a widely applied technology in the field of automatic control of the programmable logic controller. In the implementation process of applying the negative pressure automatic control valve group, when the oil smoke amount of the bearing chamber is reduced, the driving nitrogen amount can be reduced by reducing the communication degree of the driving inlet end of the gas ejector and the driving nitrogen supply pipe, so that the suction strength of the gas ejector on the oil smoke in the oil return tank is reduced; when the oil smoke amount of the bearing chamber is increased, the driving nitrogen amount can be increased by increasing the communication degree of the driving inlet end of the gas ejector and the driving nitrogen supply pipe, so that the suction strength of the gas ejector on the oil smoke in the oil return tank is improved, and the stable operation of the oil smoke separation and discharge device is ensured.

In this embodiment, the oil smoke separating and discharging device may further include: a fume gas collecting pipeline 10 and a back suction prevention component 102. The oil smoke gas collecting pipeline 10 may also be composed of a plurality of pipelines, one end of each pipeline is connected to the oil smoke discharge port of each bearing chamber 1 of the industrial steam turbine compressor unit, the other ends of the pipelines are collected and connected together and guided into the air to form a high-point emptying end 101, and a back suction prevention assembly 102 is installed on the high-point emptying end 101. When the amount of oil smoke generated by the bearing chamber 1 is large, a small amount of oil smoke can be discharged from the high-point emptying end 101 through the oil smoke gas collecting pipeline 10, and because the anti-reverse-suction assembly 102 is arranged at the high-point emptying end 101, air can be prevented from entering the bearing chamber 1 and the oil return box 3 through the oil smoke gas collecting pipeline 10, so that the contact between the oil smoke and the air is avoided.

To sum up, the oil smoke separating and discharging device of the utility model can effectively filter and separate the tiny oil drops in the oil smoke through the oil smoke filtering device, and the air cooler can reduce the temperature of the high temperature oil smoke sprayed out from the outlet end of the gas ejector to the atmospheric environment temperature so as to facilitate the oil smoke to be more thoroughly separated from the gas and the liquid in the cyclone gas-liquid separator, thereby improving the oil smoke separation efficiency; and the nitrogen gas is used as the protective gas and the driving gas in the oil smoke separation process, so that the oil smoke can be effectively prevented from contacting with the air, the recovered lubricating oil is prevented from being oxidized, and the oil smoke deflagration condition can be avoided.

Above only be the preferred embodiment of the utility model discloses a not be used for injecing the utility model discloses a patent range, other applications the utility model discloses an equivalent change that the patent design was done all should belong to the patent protection scope of the utility model.

Claims

1. An oil smoke separating and discharging device of an industrial steam turbine compressor unit comprises: an oil return pipeline and an oil return box in a closed shape; one end of the oil return pipeline is connected with an oil return discharge port of a bearing chamber of the industrial steam turbine compressor unit, and the other end of the oil return pipeline is connected with the oil return box; it is characterized by also comprising: the oil fume filtering device, the gas ejector, the air cooler and the cyclone gas-liquid separator; the oil return box is connected with a protective nitrogen supply pipe; the oil fume filtering device is arranged on the upper part of the oil return box, and the outlet end of the oil fume filtering device is connected with the negative pressure inlet end of the gas injector through a pipeline; the driving inlet end of the gas ejector is connected with a driving nitrogen supply pipe, and the outlet end of the gas ejector is connected with the inlet end of the air cooler through a pipeline; the outlet end of the air cooler is connected with the inlet end of the cyclone gas-liquid separator through a pipeline; the gas phase outlet end of the cyclone gas-liquid separator is connected with an oil fume discharge pipe leading to the air, and the liquid phase outlet end of the cyclone gas-liquid separator is connected with the oil return box through a liquid collecting pipe.

2. The oil smoke separating and discharging device of industrial steam turbine compressor set according to claim 1, wherein the oil smoke filtering device is composed of a primary filter and a coalescing filter set connected in series by a pipeline, the primary filter is disposed above the inside of the oil return box, and the outlet end of the primary filter is connected with the inlet end of the coalescing filter set located above the outside of the upper side wall of the oil return box by a pipeline penetrating the upper side wall of the oil return box, and the outlet end of the coalescing filter set is connected with the negative pressure inlet end of the gas ejector by a pipeline.

3. The apparatus of claim 2, wherein the primary filter is formed by combining a suction layer located at a lower layer and a filter layer located at an upper layer, and an outlet port is provided at an upper portion of the filter layer.

4. The oil smoke separating and discharging device of an industrial steam turbine compressor unit according to claim 3, wherein the suction layer is formed of a perforated plate, and the filter layer is formed of a wire mesh demister.

5. The apparatus of claim 2, wherein the coalescing filter group comprises two coalescing filters arranged in parallel and two oil drain pipes connected between the two coalescing filters and the oil return tank, respectively, the outlet ends of the primary filters are connected to the inlet ends of the two coalescing filters through pipes penetrating the upper sidewall of the oil return tank, respectively, and the outlet ends of the two coalescing filters are connected to the negative pressure inlet end of the gas ejector through pipes.

6. The oil smoke separating and discharging device of industrial steam turbine compressor set according to claim 5, wherein the pipes at the inlet ends of the two coalescing filters and/or the pipes at the outlet ends of the two coalescing filters are provided with valves.

7. The apparatus of claim 5 wherein the oil discharge tube is a serpentine tube having two bends.

8. The apparatus as claimed in claim 1, wherein the driving nitrogen supply pipe is provided with a negative pressure self-control valve set, and the negative pressure self-control valve set monitors the pressure in the oil return tank to control the degree of communication between the driving inlet end of the gas injector and the driving nitrogen supply pipe.

9. The oil smoke separating and discharging device of industrial steam turbine compressor set according to claim 8, wherein the negative pressure automatic control valve set is composed of a control valve, a controller and a pressure monitor, the control valve is disposed on the driving nitrogen gas supply pipe, the pressure monitor is disposed on the oil return tank, the controller is electrically connected to the control valve and the pressure monitor, respectively, the controller controls the opening degree of the control valve according to the pressure in the oil return tank monitored by the pressure monitor.

10. The apparatus for separating and exhausting oil and smoke of an industrial steam turbine compressor unit according to claim 1, further comprising: the oil fume exhaust device comprises an oil fume gas collecting pipeline and an anti-reverse suction assembly, wherein one end of the oil fume gas collecting pipeline is connected with an oil fume exhaust port of the bearing chamber, the other end of the oil fume gas collecting pipeline is led to the air to form a high-point emptying end, and the anti-reverse suction assembly is arranged at the high-point emptying end.