CN220119357U - Bubbling deoxidization system of steam turbine condensing system and steam turbine condensing system - Google Patents

Abstract

The utility model relates to a bubble deoxidization system and steam turbine condensing system of steam turbine condensing system, including bubble deoxidization device, steam delivery pipe, first hydrophobic pipe. The bubble deoxidizing device is used for setting up in the hot well of condenser bottom, and bubble deoxidizing device sets up to the below that is located the liquid level of condensate water in the hot well, the first end of steam conveying pipe is used for with supplementary steam header intercommunication, the second end of steam conveying pipe is used for with bubble deoxidizing device intercommunication, so that the steam in the supplementary steam header can flow into in the bubble deoxidizing device, carry out bubble deoxidization to the condensate water in the hot well, the first end and the minimum department intercommunication of steam conveying pipe of first hydrophobic pipe, the second end of first hydrophobic pipe is used for with external environment and/or condenser intercommunication. The steam and condensed water in the auxiliary steam header are heated and deoxidized, condensed water in the steam conveying pipe is discharged to the external environment or the condenser through the first drain pipe, so that accumulated water can be prevented from flowing back, and the purpose of saving resources is achieved.

Description

Bubbling deoxidization system of steam turbine condensing system and steam turbine condensing system

Technical Field

The disclosure relates to the technical field of steam turbine condensation, in particular to a bubbling deoxidization system of a steam turbine condensing system and the steam turbine condensing system.

Background

In the starting and running process of the turbine unit, part of the medium is lost or pumped out due to running requirements, medium water needs to be supplemented to the condenser serving as water supplementing receiving equipment, however, the supplemented water has higher oxygen content, and in order to reduce corrosion of the supplemented water to unit equipment, the supplemented water is usually subjected to vacuum deoxidization. For the condition of large water supplementing quantity, the deoxidizing requirement on the condensed water cannot be met in a vacuum deoxidizing mode, so that a bubbling deoxidizing device is also required to be arranged in a condenser hot well to reduce the oxygen content in the condensed water.

Patent document CN115264484a discloses a single-layer tray type horizontal bypass bubbling deaeration device, which is characterized in that a bubbling plate is arranged on a condensate collecting tray filled with condensate, steam is introduced into the condensate collecting tray through a bubbling steam inlet to heat the condensate, so that oxygen in the condensate passes through the bubbling plate in a bubble form and passes out of the water surface, and the deaeration purpose of the condensate is realized.

Because in the bubbling deoxidizing device, condensed water can be generated in the pipeline for introducing steam, and the condensed water in the pipeline can have the condition of ponding and backflow, thereby affecting the normal operation of unit equipment.

Disclosure of Invention

The purpose of the present disclosure is to provide a bubbling deoxidization system of a steam turbine condensing system and a steam turbine condensing system, so as to solve the technical problems existing in the related art.

In order to achieve the above object, according to one aspect of the present disclosure, there is provided a bubbling deoxygenation system of a condensing system of a steam turbine, comprising:

the bubbling deoxidizing device is arranged in a hot well at the bottom of the condenser and is arranged below the liquid level of the condensed water in the hot well;

the first end of the steam conveying pipe is communicated with an auxiliary steam header, and the second end of the steam conveying pipe is communicated with a bubbling deoxidizing device, so that steam in the auxiliary steam header can flow into the bubbling deoxidizing device to bubble deoxidize condensation water in the thermal well;

the first end of the first water drain pipe is communicated with the lowest point of the steam conveying pipe, and the second end of the first water drain pipe is used for being communicated with the external environment and/or the condenser.

Optionally, the bubbling deoxidizing device comprises a tray, a cover plate and a bubbling pipe, wherein the cover plate is covered on the tray and encloses a cavity together with the tray, a plurality of first through holes are formed on the cover plate, the bubbling pipe is used for being communicated with the second end of the steam conveying pipe, at least part of the bubbling pipe is positioned in the cavity, and a plurality of second through holes are formed on the part of the bubbling pipe positioned in the cavity.

Optionally, the bubbling deoxidizing device is multiple, and the bubbling pipe of each bubbling deoxidizing device is penetrated through the tray of the bubbling deoxidizing device and is provided with a bubbling pipe body positioned in the tray, and a first connecting pipe and a second connecting pipe which are respectively positioned at two sides of the tray;

the bubbling deoxidization system further comprises a steam discharge box, a plurality of bubbling deoxidization devices are arranged side by side, every two adjacent first connecting pipes and second connecting pipes of the bubbling deoxidization devices are connected with each other, the first connecting pipes of the bubbling deoxidization devices positioned at the head ends of the plurality of bubbling deoxidization devices are communicated with the second ends of the steam conveying pipes, and the second connecting pipes of the bubbling deoxidization devices positioned at the tail ends of the plurality of bubbling deoxidization devices are communicated with the steam discharge box.

Optionally, the first hydrophobic pipe comprises a hydrophobic main pipe, a first hydrophobic branch pipe, a second hydrophobic branch pipe and a condensate recovery pipe, wherein the first end of the hydrophobic main pipe is communicated with the lowest part of the steam delivery pipe, the second end of the hydrophobic main pipe is communicated with the first end of the first hydrophobic branch pipe and the first end of the second hydrophobic branch pipe, the second end of the first hydrophobic branch pipe is used for being communicated with the external environment, the second end of the second hydrophobic branch pipe is communicated with the first end of the condensate recovery pipe, and the second end of the condensate recovery pipe is used for being communicated with the condenser;

the first drainage branch pipe is provided with a first switch valve, and the second drainage branch pipe is provided with a steam trap.

Optionally, the first hydrophobic pipe further comprises a third hydrophobic branch pipe, a first end of the third hydrophobic branch pipe is communicated with a second end of the hydrophobic main pipe, a second end of the third hydrophobic branch pipe is communicated with a first end of the condensate recovery pipe, a hydrophobic pneumatic door is arranged on the third hydrophobic branch pipe, a second switch valve and a third switch valve are further arranged on the second hydrophobic branch pipe, and the second switch valve and the third switch valve are respectively located at the upstream and the downstream of the steam trap.

Optionally, the steam delivery pipe is provided with a flowmeter and a flow regulating valve.

Optionally, a fourth switching valve and a fifth switching valve are further arranged on the steam delivery pipe, the fourth switching valve is located at the upstream of the flow regulating valve, and the fifth switching valve is located at the downstream of the flow regulating valve;

the bubbling deoxidization system further comprises a bypass pipe, wherein the first end of the bypass pipe is connected with the part of the steam delivery pipe, which is positioned at the upstream of the fourth switch valve, the second end of the bypass pipe is connected with the part of the steam delivery pipe, which is positioned at the downstream of the fifth switch valve, and a sixth switch valve is arranged on the bypass pipe.

Optionally, the bubbling deoxidizing system further comprises a second hydrophobic pipe, wherein a first end of the second hydrophobic pipe is communicated with the lowest point of the bypass pipe, and a second end of the second hydrophobic pipe is connected to the first hydrophobic pipe.

Optionally, the steam delivery pipe comprises a main steam delivery pipe, a first steam delivery branch pipe and a second steam delivery branch pipe, the condenser comprises a high-pressure side condenser and a low-pressure side condenser, a first end of the main steam delivery pipe is used for being communicated with the auxiliary steam header, a second end of the main steam delivery pipe is communicated with a first end of the first steam delivery branch pipe and a first end of the second steam delivery branch pipe, a second end of the first steam delivery branch pipe is communicated with a bubbling device in a hot well at the bottom of the high-pressure side condenser, a second end of the second steam delivery branch pipe is communicated with a bubbling deoxidizing device in a hot well at the bottom of the low-pressure side condenser, a seventh switch valve is arranged on the first steam delivery branch pipe, and an eighth switch valve is arranged on the second steam delivery branch pipe;

the second end of the first hydrophobic pipe is used for being communicated with the external environment and/or the high-pressure side condenser; or the second end of the first hydrophobic pipe is used for being communicated with the external environment and/or the low-pressure side condenser.

According to another aspect of the present disclosure, a condensing system of a steam turbine is provided, including a condenser, a thermal well disposed at the bottom of the condenser, and the bubbling deoxidizing system described above.

Through the technical scheme, the steam in the auxiliary steam header is introduced into the bubbling deoxidizing device by the steam conveying pipe, the condensed water in the hot well is heated, and the dissolved oxygen in the condensed water can penetrate out of the water surface in a bubble form, so that deoxidization of the condensed water is realized, and the condition that the normal operation of the equipment is influenced due to corrosion of the dissolved oxygen in the condensed water to the turbine unit equipment can be avoided. In addition, because the steam introduced into the bubbling deoxidizing device is the steam in the auxiliary steam header, and the auxiliary steam header is equipment in the steam turbine unit, the equipment for generating steam is not required to be additionally arranged for the bubbling deoxidizing device, and thus the aim of saving cost can be achieved.

Because the condensed water condensed by part of steam in the steam conveying pipe can be converged at the lowest position of the steam conveying pipe, and the first end of the first hydrophobic pipe is communicated with the lowest point of the steam conveying pipe, the condensed water in the steam conveying pipe can be discharged through the first hydrophobic pipe, and therefore the condensed water in the steam conveying pipe can be prevented from flowing back into the auxiliary steam header to influence the normal operation of the auxiliary steam header. And the condensed water in the steam conveying pipe can be discharged to the external environment through the first hydrophobic pipe and can also be used as cooling water to be conveyed into the condenser for recycling, thereby achieving the purpose of saving resources.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a flow diagram of a bubbling oxygen removal system provided by an exemplary embodiment of the present disclosure;

fig. 2 is a perspective view of a bubbling deoxidizing device of a bubbling deoxidizing system provided by an exemplary embodiment of the present disclosure, wherein a cover plate is not covered on a tray.

Description of the reference numerals

10-bubbling deoxidizing device; 11-a tray; 12-cover plate; 13-bubbling tube; 131-bubbling tube body; 132-a first take over; 133-a second take over; 14-a first through hole; 15-a second through hole; 16-cavity; 20-a steam delivery pipe; 21-a main steam delivery pipe; 211-a flow meter; 212-a flow regulating valve; 213-fourth switching valve; 214-a fifth switching valve; 215-eleventh switching valve; 22-a first vapor delivery manifold; 221-seventh switch valve; 23-a second vapor delivery manifold; 231-eighth switch valve; 30-an auxiliary steam header; 40-a first hydrophobic pipe; 41-a hydrophobic main pipe; 411-tenth switching valve; 42-a first hydrophobic branch; 421-a first switching valve; 43-a second hydrophobic branch; 431-steam trap; 432-a second switching valve; 433-a third switching valve; 44-a condensate recovery tube; 441-twelfth switching valve; 45-a third hydrophobic branch; 451-hydrophobic pneumatic gates; 50-a condenser; 51-a high-pressure side condenser; 52-a low-pressure side condenser; 60-heating the well; 70-bypass pipe; 701-sixth switch valve; 80-a second hydrophobic pipe; 801-ninth on-off valve.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the description of the present disclosure, unless otherwise indicated, directional terms such as "upstream" and "downstream" are used to define the direction of flow of steam or water, and the terms "inner and outer" refer to the interior and exterior of the corresponding structural profile. Furthermore, the terms "first," "second," and the like, herein, are used merely for distinguishing one element from another and not for describing a sequential or chronological order.

In the description of the present disclosure, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

As shown in fig. 1 to 2, the present disclosure provides a bubbling deoxidizing system of a condensing system of a steam turbine, which includes a bubbling deoxidizing device 10, a steam delivery pipe 20, and a first hydrophobic pipe 40. The bubbling deoxidizing device 10 is used to be arranged in the hot well 60 at the bottom of the condenser 50, and the bubbling deoxidizing device 10 is arranged below the liquid level of the condensed water in the hot well 60. The first end of the steam delivery pipe 20 is used for communicating with the auxiliary steam header 30, and the second end of the steam delivery pipe 20 is communicated with the bubbling deoxidizing device 10, so that steam in the auxiliary steam header 30 can flow into the bubbling deoxidizing device 10 to bubble deoxidize condensation water in the thermal well 60. The first end of the first hydrophobic pipe 40 communicates with the lowest point of the steam delivery pipe 20, and the second end of the first hydrophobic pipe 40 is adapted to communicate with the external environment and/or the condenser 50.

Through the above technical scheme, the steam in the auxiliary steam header 30 is introduced into the bubbling deoxidizing device 10 by using the steam conveying pipe 20, and the condensed water in the hot well 60 is heated, and the dissolved oxygen in the condensed water can penetrate out of the water surface in a bubble form, so that deoxidization of the condensed water is realized, and the condition that the normal operation of the equipment is influenced due to corrosion of the dissolved oxygen in the condensed water to the turbine unit equipment can be avoided. In addition, because the steam introduced into the bubbling deoxidizing device 10 is the steam in the auxiliary steam header 30, and the auxiliary steam header 30 is equipment in the steam turbine unit, the equipment for generating steam is not required to be additionally arranged for the bubbling deoxidizing device 10, and the aim of saving cost can be achieved.

Since part of condensed water condensed in the steam delivery pipe 20 is concentrated at the lowest position of the steam delivery pipe 20 and the first end of the first hydrophobic pipe 40 is communicated with the lowest point of the steam delivery pipe 20, the condensed water in the steam delivery pipe 20 can be discharged through the first hydrophobic pipe 40, so that the condensed water in the steam delivery pipe 20 can be prevented from flowing back into the auxiliary steam header 30 to affect the normal operation of the auxiliary steam header 30. The condensed water in the steam delivery pipe 20 can be discharged to the external environment through the first hydrophobic pipe 40, and can also be delivered to the condenser 50 as cooling water for recycling, thereby achieving the purpose of saving resources.

For the situation that the condensed water is recovered to the condenser 50, since impurities may exist in the steam conveying pipe 20 when the bubbling deoxidization system provided by the disclosure is put into operation, and the medium adopted by the thermodynamic cycle of the steam turbine unit is water with higher cleanliness, the condensed water mixed with impurities (such as pipeline rust slag) can be conveyed to the external environment through the first hydrophobic pipe 40 to be discharged until the interior of the pipeline of the steam conveying pipe 20 is clean (i.e. the condensed water does not contain impurities), and then the clean condensed water is conveyed to the condenser 50 through the first hydrophobic pipe 40 for recycling.

Alternatively, an eleventh switching valve 215 may be provided at a position of the main steam transporting pipe 21 near the auxiliary steam header 30, wherein the eleventh switching valve 215 may be provided as an electric door or a pneumatic door, which is not limited in the present disclosure. The eleventh switching valve 215 is automatically opened when the auxiliary steam header 30 is sensed to discharge steam, so that the steam delivery pipe 20 performs a steam delivery operation.

In one embodiment of the present disclosure, as shown in fig. 2, the bubbling deoxidizing device 10 may include a tray 11, a cover plate 12, and a bubbling tube 13, where the cover plate 12 is disposed on the tray 11 and encloses a cavity 16 together with the tray 11, a plurality of first through holes 14 are formed on the cover plate 12, the bubbling tube 13 is used for communicating with the second end of the steam delivery tube 20, at least part of the bubbling tube 13 is located in the cavity 16, and a plurality of second through holes 15 are formed on a part of the bubbling tube 13 located in the cavity 16. The steam in the steam delivery pipe 20 can be delivered into the bubbling pipe 13 and discharged through the second through hole 15 to be mixed with the condensed water in the cavity 16, and the dissolved oxygen in the condensed water penetrates out of the water surface from the first through hole 14 on the cover plate 12 in the form of bubbles (i.e. water surface water vapor rises together to generate a large amount of bubbles and turns up and down), so that the purpose of deoxidizing the condensed water is realized.

In order to enhance the oxygen scavenging effect of the bubbling oxygen scavenging system, as an embodiment, as shown in fig. 1 to 2, the bubbling oxygen scavenging device 10 may be provided in plurality, and the bubbling pipe 13 of each bubbling oxygen scavenging device 10 is penetrated through the tray 11 of the bubbling oxygen scavenging device 10 and has a bubbling pipe body 131 located in the tray 11, and a first connection pipe 132 and a second connection pipe 133 located at both sides of the tray 11, respectively. The bubbling deoxidizing system further comprises a steam discharge box (not shown), the plurality of bubbling deoxidizing devices 10 are arranged side by side, the first connecting pipe 132 and the second connecting pipe 133 of each two adjacent bubbling deoxidizing devices 10 are connected with each other, the first connecting pipe 132 of the bubbling deoxidizing device 10 positioned at the head end of the plurality of bubbling deoxidizing devices 10 is used for being communicated with the second end of the steam conveying pipe 20, and the second connecting pipe 133 of the bubbling deoxidizing device 10 positioned at the tail end of the plurality of bubbling deoxidizing devices 10 is communicated with the steam discharge box.

Since steam enters the bubbling tube body 131 from the first connection tube 132, a part of steam enters the cavity 16 of the tray 11 from the first through hole 14 on the bubbling tube body 131, and another part of steam enters the second connection tube 133 from the inside of the bubbling tube body 131, so that the next bubbling deoxidizing device 10 is started to improve the bubbling deoxidizing effect. When the plurality of bubble deoxidizing devices 10 are arranged side by side, the steam in the second connection pipe 133 of the bubble deoxidizing device 10 located at the tail end of the plurality of bubble deoxidizing devices 10 may be discharged to the external environment (i.e., the hot well 60), and thus, the steam in the second connection pipe 133 of the bubble deoxidizing device 10 at the tail end may be collected by the steam discharge box, and the steam may be prevented from being discharged into the hot well 60 and causing corrosion of the steel structure in the hot well 60.

Optionally, as shown in fig. 1, the first hydrophobic pipe 40 includes a main hydrophobic pipe 41, a first hydrophobic branch pipe 42, a second hydrophobic branch pipe 43, and a condensate recovery pipe 44, a first end of the main hydrophobic pipe 41 is communicated with a lowest part of the steam delivery pipe 20, a second end of the main hydrophobic pipe 41 is communicated with a first end of the first hydrophobic branch pipe 42 and a first end of the second hydrophobic branch pipe 43, a second end of the first hydrophobic branch pipe 42 is communicated with an external environment, a second end of the second hydrophobic branch pipe 43 is communicated with a first end of the condensate recovery pipe 44, a second end of the condensate recovery pipe 44 is communicated with the condenser 50, a first switch valve 421 is provided on the first hydrophobic branch pipe 42, and a steam trap 431 is provided on the second hydrophobic branch pipe 43.

When the bubbling deoxidizing system starts to operate, condensed water condensed by steam in the pipeline is gathered at the lowest position of the steam conveying pipe 20, and as rust may occur in the steam conveying pipe 20, the drain main pipe 41 and the first drain branch pipe 42 are conducted (i.e. the first switch valve 421 is opened and the drain 431 is closed), so that the condensed water containing impurities flows to the external environment through the drain main pipe 41 and the first drain branch pipe 42 in sequence.

When no impurity is present in the condensed water flowing out of the first drain branch pipe 42, the first switch valve 421 is closed and the steam trap 431 is opened, and the drain main pipe 41, the second drain branch pipe 43 and the condensed water recovery pipe 44 are conducted, so that clean condensed water flows into the condenser 50 through the drain main pipe 41, the second drain branch pipe 43 and the condensed water recovery pipe 44 in this order.

Alternatively, the first switch valve 421 may be a manual door, and a worker may first observe whether the condensed water contains impurities, and then select whether to close the first switch valve 421.

A twelfth switching valve 441 may be provided on the condensate recovery tube 44, and the twelfth switching valve 441 may be a manual door for controlling the opening and closing of the condensate recovery tube 44.

In order to facilitate maintenance of the steam trap 431 without affecting the water-draining operation of the bubbling deoxidizing system, as an embodiment, as shown in fig. 1, the first water-draining pipe 40 may further include a third water-draining branch pipe 45, a first end of the third water-draining branch pipe 45 is communicated with a second end of the water-draining main pipe 41, a second end of the third water-draining branch pipe 45 is communicated with a first end of the condensed water recovery pipe 44, a water-draining pneumatic door 451 is disposed on the third water-draining branch pipe 45, a second switch valve 432 and a third switch valve 433 are further disposed on the second water-draining branch pipe 43, and the second switch valve 432 and the third switch valve 433 are located upstream and downstream of the steam trap 431, respectively.

Thus, when the steam trap 431 on the second drain branch pipe 43 needs to be overhauled, the upstream and downstream of the steam trap 431 can be cut off by closing the second switch valve 432 and the third switch valve 433, and then the drain pneumatic door 451 is opened, so that the condensed water in the drain main pipe 41 can flow into the condenser 50 through the drain main pipe 41, the third drain branch pipe 45 and the condensed water recovery pipe 44 in sequence. Wherein, closing the second switch valve 432 and the third switch valve 433 simultaneously can prevent condensed water in the main drain pipe 41 and condensed water in the third drain branch pipe 45 from entering the second drain branch pipe 43 without affecting the maintenance of the steam trap 431 by a worker.

When the steam trap 431 is not required to be overhauled, the steam trap pneumatic door 451 can be closed to stop the steam trap operation of the third steam trap 45, and then the second switch valve 432 and the third switch valve 433 are opened to enable condensed water in the steam trap main pipe 41 to flow into the condenser 50 through the steam trap main pipe 41, the second steam trap 43 and the condensed water recovery pipe 44 in sequence.

In other embodiments, the hydrophobic pneumatic door 451 may also be replaced with an electrically powered door, as the disclosure is not limited in this regard. In addition, the second and third switching valves 432 and 433 may be manual gates.

Optionally, as shown in fig. 1, a flow meter 211 and a flow regulating valve 212 are provided on the steam delivery pipe 20. Wherein the flow meter 211 is used to detect the flow rate of the steam in the steam delivery pipe 20. The flow rate adjusting valve 212 is used for adjusting the flow rate of the steam in the steam delivery pipe 20, and the flow rate adjusting valve 212 may be an orifice type adjusting valve, a nozzle type adjusting valve or a venturi type adjusting valve, which is not limited in the present disclosure.

In order to facilitate maintenance of the flow regulating valve 212 without affecting the operation of delivering the steam in the auxiliary steam header 30 to the bubble removal means 10, as an embodiment, as shown in fig. 1, a fourth switching valve 213 and a fifth switching valve 214 may be further disposed on the steam delivery pipe 20, the fourth switching valve 213 being located upstream of the flow regulating valve 212, the fifth switching valve 214 being located downstream of the flow regulating valve 212, the bubble removal system further comprising a bypass pipe 70, a first end of the bypass pipe 70 being bypassed at a portion of the steam delivery pipe 20 located upstream of the fourth switching valve 213, a second end of the bypass pipe 70 being bypassed at a portion of the steam delivery pipe 20 located downstream of the fifth switching valve 214, and a sixth switching valve 701 being disposed on the bypass pipe 70. By simultaneously closing the fourth switching valve 213 and the fifth switching valve 214, the sixth switching valve 701 is opened so that the flow regulating valve 212 stops the steam delivery operation, and the steam of the steam delivery pipe 20 can flow through the bypass pipe 70 without affecting the maintenance of the flow regulating valve 212 by the worker.

Alternatively, the fourth switching valve 213 and the fifth switching valve 214 may be electric isolation gates, and the sixth switching valve 701 may be a manual gate, which is not limited in the present disclosure.

For embodiments in which bypass conduit 70 is bypassed over vapor delivery pipe 20, the bubble deoxygenation system further includes a second hydrophobic conduit 80, a first end of second hydrophobic conduit 80 being in communication with the lowest point of bypass conduit 70, a second end of second hydrophobic conduit 80 being bypassed over first hydrophobic conduit 40 (e.g., hydrophobic main tube 41 of the first hydrophobic conduit).

Further, a ninth switching valve 801 and a tenth switching valve 411 may be provided on the second drain pipe 80 and the drain main pipe 41, respectively. Among them, the ninth switching valve 801 and the tenth switching valve 411 may be manual gates, which are not limited by the present disclosure.

In one embodiment of the present disclosure, as shown in fig. 1, the steam delivery pipe 20 may include a steam delivery main pipe 21, a first steam delivery branch pipe 22 and a second steam delivery branch pipe 23, the condenser 50 includes a high pressure side condenser 51 and a low pressure side condenser 52, a first end of the steam delivery main pipe 21 is used to communicate with the auxiliary steam header 30, a second end of the steam delivery main pipe 21 is communicated with a first end of the first steam delivery branch pipe 22 and a first end of the second steam delivery branch pipe 23, a second end of the first steam delivery branch pipe 22 is communicated with the bubble deaeration device 10 in the hot well 60 at the bottom of the high pressure side condenser 51, a second end of the second steam delivery branch pipe 23 is communicated with the bubble deaeration device 10 in the hot well 60 at the bottom of the low pressure side condenser 52, a seventh switch valve 221 is provided on the first steam delivery branch pipe 22, and an eighth switch valve 231 is provided on the second steam delivery branch pipe 23. The device can realize the purpose of one steam and multiple purposes, and can simultaneously carry out steam bubbling deoxidization on the condensation water in the hot well 60 at the bottom of the high-pressure side condenser 51 and the condensation water in the hot well 60 at the bottom of the low-pressure side condenser 52, thereby being beneficial to improving the deoxidization working efficiency.

Wherein the second end of the first hydrophobic pipe 40 may be used to communicate with the external environment or the high pressure side condenser 51, or the second end of the first hydrophobic pipe 40 may be used to communicate with the external environment or the low pressure side condenser 52. Since the high-pressure side condenser 51 and the low-pressure side condenser 52 are connected, clean condensate from the first drain pipe 40 can be sent to the high-pressure side condenser 51 or the low-pressure side condenser 52 through the condensate recovery pipe 44.

Alternatively, the seventh and eighth switching valves 221 and 231 may be manual gates, which is not limited by the present disclosure.

According to another aspect of the present disclosure, a condensing system of a steam turbine is provided, including a condenser 50, a thermal well 60 disposed at the bottom of the condenser 50, and the bubbling deoxidizing system described above.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (10)

1. A bubbling deoxygenation system for a turbine condensing system comprising:

the bubbling deoxidizing device is arranged in a hot well at the bottom of the condenser and is arranged below the liquid level of the condensed water in the hot well;

the first end of the steam conveying pipe is communicated with the auxiliary steam header, and the second end of the steam conveying pipe is communicated with the bubbling deoxidizing device, so that steam in the auxiliary steam header can flow into the bubbling deoxidizing device to bubble deoxidize condensation water in the thermal well;

the first end of the first water drain pipe is communicated with the lowest point of the steam conveying pipe, and the second end of the first water drain pipe is used for being communicated with the external environment and/or the condenser.

2. The bubbling oxygen removal system according to claim 1, wherein the bubbling oxygen removal device comprises a tray, a cover plate and a bubbling tube, the cover plate is covered on the tray and encloses a cavity together with the tray, a plurality of first through holes are formed in the cover plate, the bubbling tube is used for communicating with the second end of the steam delivery tube, at least part of the bubbling tube is positioned in the cavity, and a plurality of second through holes are formed in the part of the bubbling tube positioned in the cavity.

3. The bubbling deoxygenation system of claim 2 wherein the bubbling deoxygenation device is a plurality of bubbling pipes, each of the bubbling deoxygenation devices having a bubbling pipe body positioned within the tray and a first connection pipe and a second connection pipe positioned on either side of the tray;

the bubbling deoxidization system further comprises a steam discharge box, a plurality of bubbling deoxidization devices are arranged side by side, every two adjacent first connecting pipes and second connecting pipes of the bubbling deoxidization devices are connected with each other, the first connecting pipes of the bubbling deoxidization devices positioned at the head ends of the plurality of bubbling deoxidization devices are communicated with the second ends of the steam conveying pipes, and the second connecting pipes of the bubbling deoxidization devices positioned at the tail ends of the plurality of bubbling deoxidization devices are communicated with the steam discharge box.

4. The bubbling oxygen-removal system according to claim 1, wherein the first hydrophobic pipe comprises a hydrophobic main pipe, a first hydrophobic branch pipe, a second hydrophobic branch pipe and a condensate recovery pipe, wherein a first end of the hydrophobic main pipe is communicated with a lowest part of the steam delivery pipe, a second end of the hydrophobic main pipe is communicated with a first end of the first hydrophobic branch pipe and a first end of the second hydrophobic branch pipe, a second end of the first hydrophobic branch pipe is used for being communicated with an external environment, a second end of the second hydrophobic branch pipe is communicated with a first end of the condensate recovery pipe, and a second end of the condensate recovery pipe is used for being communicated with the condenser;

the first drainage branch pipe is provided with a first switch valve, and the second drainage branch pipe is provided with a steam trap.

5. The bubbling deoxygenation system of claim 4 wherein the first hydrophobic pipe further comprises a third hydrophobic branch pipe having a first end in communication with the second end of the hydrophobic main pipe and a second end in communication with the first end of the condensate recovery pipe, the third hydrophobic branch pipe having a hydrophobic pneumatic gate disposed thereon, and the second hydrophobic branch pipe further having a second switch valve and a third switch valve disposed thereon, the second switch valve and the third switch valve being located upstream and downstream of the steam trap, respectively.

6. The bubbling oxygen-removal system according to any one of claims 1-5, wherein a flow meter and a flow regulating valve are provided on the vapor delivery pipe.

7. The bubbling oxygen removal system according to claim 6, wherein a fourth switching valve and a fifth switching valve are further disposed on said vapor delivery pipe, said fourth switching valve being located upstream of said flow regulation valve, said fifth switching valve being located downstream of said flow regulation valve;

the bubbling deoxidization system further comprises a bypass pipe, wherein the first end of the bypass pipe is connected with the part of the steam delivery pipe, which is positioned at the upstream of the fourth switch valve, the second end of the bypass pipe is connected with the part of the steam delivery pipe, which is positioned at the downstream of the fifth switch valve, and a sixth switch valve is arranged on the bypass pipe.

8. The bubbling oxygen-scavenging system of claim 7, further comprising a second hydrophobic pipe having a first end in communication with a lowest point of said bypass pipe, a second end of said second hydrophobic pipe being bypassed on said first hydrophobic pipe.

9. The bubble removal system of any one of claims 1-5, wherein the vapor delivery tube comprises a vapor delivery main, a first vapor delivery manifold, and a second vapor delivery manifold, the condenser comprising a high side condenser and a low side condenser, the first end of the vapor delivery main being configured to communicate with the auxiliary vapor header, the second end of the vapor delivery main being configured to communicate with the first end of the first vapor delivery manifold and the first end of the second vapor delivery manifold, the second end of the first vapor delivery manifold being configured to communicate with a bubble removal device in a hot well at the bottom of the high side condenser, the second end of the second vapor delivery manifold being configured to communicate with a bubble removal device in a hot well at the bottom of the low side condenser, the first vapor delivery manifold having a seventh switching valve disposed thereon, the second vapor delivery manifold having an eighth switching valve disposed thereon;

the second end of the first hydrophobic pipe is used for being communicated with the external environment and/or the high-pressure side condenser; or the second end of the first hydrophobic pipe is used for being communicated with the external environment and/or the low-pressure side condenser.

10. A steam turbine condensing system comprising a condenser, a thermal well disposed at the bottom of the condenser, and the bubbling deoxygenation system of any one of claims 1-9.