阅读说明：本技术 凝结水回收再利用系统 (Condensate recycling system ) 是由 周世纬 张亚东 于 2019-12-18 设计创作，主要内容包括：本发明属于化工工艺领域,具体涉及背压式汽轮机汽封抽空器的凝结水回收再利用系统。包括汽封漏气管道、第一管道、汽封漏气水冷器、抽空器、抽空器水冷器、第二管道及凝水管道；所述汽封漏气管道一端连接在汽轮机的进口侧轴端位置,汽封漏气管道另一端连接至汽轮机的出口侧轴端位置,汽封漏气管道通过第一管道连接至汽封漏气水冷器,所述汽封漏气水冷器通过凝水管道连接至含油污水管网,所述汽封漏气水冷器连接至抽空器,1.0MPa蒸汽通入抽空器,抽空器出口连接至抽空器水冷器,抽空器水冷器通过第二管道连接至凝水管道。其可回收利用凝结水,实现汽封漏气迅速带走的目的。(The invention belongs to the field of chemical processes, and particularly relates to a condensate water recycling system of a back pressure type steam turbine gland sealing evacuator. The device comprises a steam seal leakage pipeline, a first pipeline, a steam seal leakage water cooler, an evacuator water cooler, a second pipeline and a condensed water pipeline; the steam seal leakage water cooler is connected to the evacuator, and 1.0MPa steam lets in the evacuator, and evacuator exit linkage to evacuator water cooler, evacuator water cooler are connected to the condensate pipeline through the second pipeline. The device can recycle the condensed water and realize the purpose of quickly taking away the steam seal leakage.)

1. Condensate recycling system, its characterized in that: the device comprises a steam seal leakage pipeline, a first pipeline, a steam seal leakage water cooler, an evacuator water cooler, a second pipeline and a condensed water pipeline; the steam seal leakage water cooler is connected to the evacuator, and 1.0MPa steam lets in the evacuator, and evacuator exit linkage to evacuator water cooler, evacuator water cooler are connected to the condensate pipeline through the second pipeline.

2. The condensate recycling system of claim 1, wherein: the system also comprises a water storage tank; one end of the second pipeline is connected to the condensed water pipeline, and the other end of the second pipeline is communicated with the water storage tank.

3. The condensate recycling system according to claim 2, wherein: the system also comprises a metering pump, a third pipeline, a fourth pipeline and a circulating water return pipeline; the water storage tank is connected to the metering pump through a third pipeline, and the metering pump is connected to a circulating water return pipeline through a fourth pipeline.

4. The condensate recycling system according to claim 3, wherein: and a second valve and a third valve are respectively arranged at the inlet and the outlet of the metering pump.

5. The condensate recycling system according to claim 3, wherein: and the pressure of the fourth pipeline is not lower than 0.6 MPa.

6. The condensate recycling system according to claim 2, wherein: and a liquid level meter is arranged on the water storage tank.

7. The condensate recycling system of claim 1, wherein: and a first valve is arranged on the first pipeline.

8. The condensate recycling system of claim 1, wherein: the condensate pipeline is provided with a stop valve, and the stop valve is arranged at the lower reaches of the upper joint position of the second pipeline on the condensate pipeline.

9. The condensate recycling system according to claim 3, wherein: and the third pipeline is connected with an emptying pipeline, and an emptying valve is arranged on the emptying pipeline.

10. The condensate recycling system of claim 1, wherein: the steam turbine is connected with a 3.5MPa steam inlet pipeline, the steam turbine is connected to the evacuator through a 1.0MPa steam outlet pipeline, and the steam turbine is a back pressure steam turbine.

Technical Field

The invention belongs to the field of chemical processes, and particularly relates to a condensate water recycling system of a back pressure type steam turbine gland sealing evacuator.

Background

The aromatic hydrocarbon disproportionation device is a production unit of the combined device, and toluene and carbon nonaromatic hydrocarbon are heated by a reaction furnace and react at high temperature and high pressure under the action of a catalyst to produce benzene and aromatic hydrocarbon products of C8 and above. The produced C8 and above aromatic hydrocarbons are sent to a xylene unit for further separation to obtain a carbon octa aromatic hydrocarbon product, and the benzene product is directly sent to a product tank area as a byproduct.

In order to ensure the full reaction of toluene and carbon nonaromatic hydrocarbon and reduce the coking of the catalyst, 80 percent v of pure hydrogen is used as a heat carrying medium, and a compressor is used as a circulating hydrogen power source. The compressor is driven by the steam turbine, and 3.5MPa steam is adopted to push the steam turbine to do work, so that hydrogen circulation is realized, and normal operation of disproportionation reaction is ensured.

During normal production, steam leakage can be produced to the steam turbine bearing seal of operation, and this part gas leakage need be taken away rapidly, if not taken away, and the lubricating oil system is scurried into along the axle head to steam, leads to lubricating oil emulsification, influences lubricated effect, leads to embracing the axle occurence of failure.

Disclosure of Invention

In view of the defects in the prior art, the invention provides a condensed water recycling system, which can recycle the condensed water and realize the purpose of quickly taking away the steam seal leakage.

In order to achieve the purpose, the technical scheme adopted by the invention is a condensed water recycling system which comprises a steam seal leakage pipeline, a first pipeline, a steam seal leakage water cooler, an evacuator water cooler, a second pipeline and a condensed water pipeline; the steam seal leakage water cooler is connected to the evacuator, and 1.0MPa steam lets in the evacuator, and evacuator exit linkage to evacuator water cooler, evacuator water cooler are connected to the condensate pipeline through the second pipeline.

Based on the technical scheme, in order to ensure that the air leakage can be taken away quickly, the 1.0MPa evacuator is adopted to enable the steam seal to generate micro negative pressure, and the taken steam seal air leakage and the 1.0MPa steam used by the evacuator are cooled by the circulating water cooler to become condensed water and then are discharged into the oil-containing sewage pipe network.

Further, the system also comprises a water storage tank; one end of the second pipeline is connected to the condensed water pipeline, and the other end of the second pipeline is communicated with the water storage tank.

Furthermore, the system also comprises a metering pump, a third pipeline, a fourth pipeline and a circulating water return pipeline; the water storage tank is connected to the metering pump through a third pipeline, and the metering pump is connected to a circulating water return pipeline through a fourth pipeline.

Based on above-mentioned technical scheme, improve the aqua storage tank with the condensate pipe in, through the metering pump send to the circulating water pipe network. The water replenishing amount of the circulating water pipe network is reduced, the sewage treatment amount of the oil-containing sewage pipe network is reduced, and the water consumption and water treatment cost of enterprises is reduced. The metering pump is a device which is driven by industrial wind and has a flow adjusting function, and the amount of the condensed water sent out is controlled by adjusting the stroke of the piston.

Preferably, the inlet and the outlet of the metering pump are respectively provided with a second valve and a third valve.

Further, the pressure of the fourth pipeline is not lower than 0.6 MPa.

Furthermore, a liquid level meter is arranged on the water storage tank.

The water storage tank is used for receiving condensed water generated in the operation process of the steam turbine, and the liquid level meter is arranged for observing the water level, so that the stroke of the metering pump can be conveniently adjusted, and the continuous operation of the device is ensured.

Further, a first valve is arranged on the first pipeline.

Further, a stop valve is arranged on the condensed water pipeline, and the stop valve is arranged at the downstream of the position of the upper joint of the second pipeline on the condensed water pipeline.

Furthermore, an emptying pipeline is connected to the third pipeline, and an emptying valve is arranged on the emptying pipeline.

Based on above-mentioned technical scheme, the blowoff valve on the second pipeline is for the convenience of device overhauls the in-process with the condensate evacuation, the easy access.

Further, the steam turbine is connected with a 3.5MPa steam inlet pipeline, and the steam turbine is connected to the evacuator through a 1.0MPa steam outlet pipeline.

The working process of the invention is as follows: the steam seal gas leakage that the steam turbine produced during the operation is connected to steam seal gas leakage water cooler through steam seal gas leakage pipeline, with partial condensate water deliver to the condensate water pipe way, the negative pressure that produces through the evacuator delivers to the evacuator water cooler with the noncondensable gas in the steam seal gas leakage water cooler, with whole condensate water deliver to the aqua storage tank through the condensate water pipe way through the second pipeline, the aqua storage tank is connected to the measuring pump through the third pipeline, is connected to circulating water pipeline through the fourth pipeline and delivers to the circulating water pipe network, the aqua storage tank sets up the level gauge. The steam turbine lets in 3.5MPa steam and produces the back pressure steam turbine of 1.0MPa steam, and the evacuator lets in 1.0MPa steam, set up the evacuation valve on the second pipeline, the condensate pipe sets up the trip valve, and the measuring pump passes through the industrial wind drive, and fourth pipeline pressure can not be less than 0.6 MPa. The condensed water recycling device is applied to condensed water generated by a steam turbine.

The operation mode of the equipment is as follows: when the liquid level of the water storage tank is higher, the metering pump is started, the stroke of the metering pump is adjusted by observing the liquid level meter on the water storage tank, the liquid level of the water storage tank is ensured to be stable, and the condensed water recycling device continuously operates.

The invention has the beneficial effects that: the invention is used for recovering the steam seal leakage generated in the operation process of the steam turbine and changing the condensate water of the steam seal leakage into the circulating water pipe network from the oil-containing sewage pipe network.

Drawings

FIG. 1 is a schematic structural diagram of the present invention:

in the figure: 1. the steam turbine 2, the gland gas leakage pipeline 3, the gland gas leakage water cooler 4, the evacuator 5, the evacuator water cooler 6, the condensed water pipeline 7, the first pipeline 8, the water storage tank 9, the second pipeline 10, the metering pump 11, the third pipeline 12, the circulating water return pipeline 13, the level gauge 14, the emptying valve 15, the shut-off valve 16, the fourth pipeline 17, the first valve 18, the second valve 19, the third valve 20, the oil-containing sewer network 21, the emptying pipeline 22, 3.5MPa steam inlet pipeline 23, 1.0MPa steam outlet pipeline.

Detailed Description

The structure of the invention is further explained in the following with the attached drawings of the specification.

A condensed water recycling system comprises a steam seal leakage pipeline 2, a first pipeline 7, a steam seal leakage water cooler 3, an evacuator 4, an evacuator water cooler 5, a second pipeline 9 and a condensed water pipeline 6; the steam seal leakage water cooler is characterized in that one end of a steam seal leakage pipeline 2 is connected to the shaft end position of the inlet side of the steam turbine 1, the other end of the steam seal leakage pipeline 2 is connected to the shaft end position of the outlet side of the steam turbine 1, the steam seal leakage pipeline 2 is connected to a steam seal leakage water cooler 3 through a first pipeline 7, the steam seal leakage water cooler 3 is connected to an oil-containing sewage pipe network 20 through a condensate pipeline 6, the steam seal leakage water cooler 3 is connected to an evacuator 4, 1.0MPa steam is introduced into the evacuator 4, the evacuator 4 is connected to an evacuator water cooler 5 in an outlet mode, and the evacuator water cooler 5 is connected to the condensate pipeline 6 through.

Based on the technical scheme, in order to ensure that the air leakage can be taken away quickly, the 1.0MPa evacuator is adopted to enable the steam seal to generate micro negative pressure, and the taken steam seal air leakage and the 1.0MPa steam used by the evacuator are cooled by the circulating water cooler to become condensed water and then are discharged into the oil-containing sewage pipe network 20.

Further, the system also comprises a water storage tank 8; one end of the second pipeline 9 is connected to the condensed water pipeline 6, and the other end of the second pipeline is communicated with the water storage tank 8.

Furthermore, the system also comprises a metering pump 10, a third pipeline 11, a fourth pipeline 16 and a circulating water return pipeline 12; the water storage tank 8 is connected to a metering pump 10 through a third pipeline 11, and the metering pump 10 is connected to a circulating water return pipeline 12 through a fourth pipeline 16.

Based on the technical scheme, the condensed water in the condensed water pipeline 6 is improved to the water storage tank 8 and is sent to a circulating water pipe network (a circulating water return pipeline 12) through a metering pump 10. The water supplementing quantity of the circulating water pipe network (the circulating water return pipe 12) is reduced, the sewage treatment quantity of the oil-containing sewage pipe network 20 is reduced, and the water consumption and water treatment cost of enterprises is reduced. The metering pump is a device which is driven by industrial wind and has a flow adjusting function, and the amount of the condensed water sent out is controlled by adjusting the stroke of the piston.

Preferably, a second valve 18 and a third valve 19 are respectively arranged at the inlet and the outlet of the metering pump 10.

Further, the pressure of the fourth pipeline is not lower than 0.6 MPa.

Further, a liquid level meter is arranged on the water storage tank 8.

The water storage tank 8 is used for receiving condensed water generated in the operation process of the steam turbine, and a liquid level meter 13 is arranged for observing the water level, so that the stroke of the metering pump can be conveniently adjusted, and the continuous operation of the device is ensured.

Further, a first valve 17 is disposed on the first pipe 7.

Further, a stop valve 15 is arranged on the condensed water pipeline 6, and the stop valve 15 is arranged on the downstream of the position of the joint of the second pipeline 9 on the condensed water pipeline.

Further, an emptying pipeline 21 is connected to the third pipeline 11, and an emptying valve 14 is arranged on the emptying pipeline 21.

Based on the above technical scheme, the evacuation valve 14 on the second pipeline 9 is used for facilitating evacuation of condensed water in the device maintenance process, thereby facilitating maintenance.

Further, the turbine is connected to a 3.5MPa steam inlet line 22 and the turbine 1 is connected to the evacuator through a 1.0MPa steam outlet line 23.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.