CN212805605U - Condensate water deoxidization system and thermal power system - Google Patents
Condensate water deoxidization system and thermal power system Download PDFInfo
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- CN212805605U CN212805605U CN202021369828.1U CN202021369828U CN212805605U CN 212805605 U CN212805605 U CN 212805605U CN 202021369828 U CN202021369828 U CN 202021369828U CN 212805605 U CN212805605 U CN 212805605U
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Abstract
The application discloses condensate water deoxidization system and thermal power system, the condensate water deoxidization system that discloses include turboset (100), air cooling unit (200), deaerator (300) and feed pump steam turbine (400), deaerator (300) have the deoxidization and hold chamber (310), wherein: the steam extraction mouth of steam turbine unit (100) through first pipeline (510) with the import of air cooling unit (200) is linked together, the export of air cooling unit (200) through second pipeline (520) with chamber (310) intercommunication is held to the deoxidization, the steam extraction mouth of feed water pump steam turbine (400) through third pipeline (530) with chamber (310) intercommunication is held to the deoxidization. The scheme can solve the problems of high energy consumption and poor economical efficiency of the thermal power generation system.
Description
Technical Field
The application relates to the technical field of thermal power generation, in particular to a condensed water deoxidization system and a thermal power generation system.
Background
The dissolved oxygen of the thermal power generation condensed water is one of important supervision indexes of the thermal power generation unit, the safe and economic operation of the unit can be directly influenced by the dissolved oxygen of the condensed water, according to the specified requirements of the thermal power generation technical supervision, the dissolved oxygen content of the wet-type power generation unit condensed water is not allowed to exceed 30 mug/L, the dissolved oxygen content of the air-cooled unit condensed water is not allowed to exceed 100 mug/L, but the thermal power generation unit which operates in China generally has the problem that the dissolved oxygen of the condensed water exceeds the standard, and great harm is brought to the safe operation of the unit.
The harm to the unit caused by the excessive oxygen content of the condensed water mainly comprises the following aspects: 1) the dissolved oxygen of the condensed water greatly exceeds the standard or is unqualified for a long time, the corrosion of condensed water pipeline equipment and the generation of iron scale of a furnace thermodynamic system can be accelerated, the heat transfer efficiency of a boiler is further influenced, and meanwhile, the dissolved oxygen of the condensed water exceeds the standard, the corrosion and scaling of the boiler pipeline equipment can be accelerated, or accidents such as boiler tube explosion and the like can occur, so that the safe and economic operation of a unit is seriously threatened; 2) in the regenerative system of the steam turbine, a surface heat exchanger is adopted, corrosion products of equipment are attached to a heat exchange surface to form a loose attachment layer, and meanwhile, the condensed water contains too much oxygen, so that a layer of film is formed on the heat exchange surface, the heat exchange thermal resistance is increased, and the heat efficiency of the regenerative system is further reduced.
At present, a bubbling deoxygenation mode is generally adopted in China, namely high-parameter steam or hydrophobic water is directly introduced into a condensed water tank, so that condensed water in the condensed water tank is mixed with the high-parameter steam or hydrophobic water, the high-parameter steam or hydrophobic water heats the condensed water, and bubbling is generated after the condensed water is heated, so that the deoxygenation purpose is achieved.
SUMMERY OF THE UTILITY MODEL
The application discloses condensate water deoxidization system and thermal power system can solve the higher and relatively poor problem of economic nature of power generation system's power consumption.
In order to solve the above technical problem, the present application is implemented as follows:
the embodiment of the application discloses condensate water deoxidization system, including turboset, air cooling unit, deaerator and feed pump steam turbine, deaerator has the deoxidization and holds the chamber, wherein:
the steam outlet of the steam turbine unit is communicated with the inlet of the air cooling unit through a first pipeline, the outlet of the air cooling unit is communicated with the deoxidizing holding cavity through a second pipeline, and the steam outlet of the water feed pump steam turbine is communicated with the deoxidizing holding cavity through a third pipeline.
The embodiment of the application also discloses a thermal power system, which comprises the condensed water deoxygenation system.
The technical scheme adopted by the application can achieve the following beneficial effects:
in the condensate water deoxidization system disclosed in the embodiment of the application, the export of air cooling unit holds the chamber intercommunication through second pipeline and deoxidization, the steam vent of water-feeding pump steam turbine holds the chamber intercommunication through third pipeline and deoxidization, carry out the deoxidization of condensate water with the exhaust steam that utilizes water-feeding pump steam turbine exhaust, can prevent the heat energy loss in the exhaust steam, the utilization efficiency of the energy is improved, thereby realize the cascade utilization of energy, and simultaneously, at condensate water deoxidization in-process, because it heats the condensate water to be the exhaust steam that water-feeding pump steam turbine exhaust, need not to introduce the steam or the drainage of high parameter, thereby prevent to introduce the deoxidization with the steam or the drainage of high parameter and hold the chamber, and then can avoid the loss and the waste of the energy, finally improve thermal power system's economic benefits and energy comprehensive utilization efficiency, realize energy saving and consumption reduction's.
Drawings
FIG. 1 is a schematic diagram of a condensed water deoxygenation system as disclosed in an embodiment of the present application with arrows indicating the direction of water vapor flow.
Description of reference numerals:
100-a steam turbine set;
200-air cooling unit;
300-a deoxidizing device, 310-a deoxidizing containing cavity, 320-a shell, 330-a spraying device and 340-a liquid level detection device;
400-feed pump turbine;
510-a first pipe, 520-a second pipe, 530-a third pipe, 540-a fourth pipe, 550-a fifth pipe;
600-water tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. The objects distinguished by "first", "second", and the like are usually a class, and the number of the objects is not limited, and for example, the first object may be one or a plurality of objects. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The technical solutions disclosed in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1, an embodiment of the present application discloses a condensed water deoxygenation system, which includes a turbine unit 100, an air cooling unit 200, a deoxygenation device 300, and a feed pump turbine 400.
The steam turbine set 100 is a generator set in a thermal power generation system, steam drives the steam turbine set 100 to generate power, and the steam is discharged from a steam outlet of the steam turbine set 100 after acting. Because the exhaust steam has a large amount of moisture, in order to reuse this part of moisture, avoid the waste of water resource, exhaust steam need cool down for the condensate water, specifically, the steam that the turbine unit 100 discharged can pass through the condenser to turn into the condensate water with steam, of course, the steam extraction mouth of turbine unit 100 is linked together through the import of first pipeline 510 with air cooling unit 200, condenser and air cooling unit 200 all can cool off steam, so that steam turns into the condensate water, realize the cyclic utilization of water resource. The structures and principles of the steam turbine unit 100 and the air cooling unit 200 are known in the art, and are not described herein again for brevity.
The oxygen removing device 300 can remove oxygen in the condensed water to a greater extent, so that the oxygen content in the condensed water is low, corrosion of pipeline equipment and generation of scale of a furnace thermodynamic system caused by high oxygen content in the condensed water are avoided, and accidents such as corrosion, scaling or boiler tube explosion of boiler pipeline equipment are prevented, and further the safety and economic operation of a thermal power generation system are improved. Meanwhile, the lower oxygen content in the condensed water can also avoid the formation of an adhesion layer on the heated surface, thereby preventing the heat exchange resistance from being increased and further improving the heat efficiency of the heat regenerative system.
In this embodiment, the deaerator device 300 has the deoxidization and holds the chamber 310, the export of air cooling unit 200 holds the chamber 310 intercommunication with the deoxidization through second pipeline 520, so that the condensate water flows into deoxidization through second pipeline 520 and holds the chamber 310, the steam vent of water feed pump steam turbine 400 holds the chamber 310 intercommunication with the deoxidization through third pipeline 530, so that the exhaust steam after doing work in the water feed pump steam turbine 400 flows into deoxidization through third pipeline 530 and holds the chamber 310, thereby make condensate water and exhaust steam mix in deoxidization holds the chamber 310, make the exhaust steam heat the condensate water, and then reach the purpose of deoxidization.
In the condensate water deoxidization system disclosed in the embodiment of the application, the export of air cooling unit 200 holds the chamber 310 intercommunication through second pipeline 520 and deoxidization, the steam vent of water-feeding pump steam turbine 400 holds the chamber 310 intercommunication through third pipeline 530 and deoxidization, in order to utilize the exhaust steam of water-feeding pump steam turbine 400 exhaust to carry out the deoxidization of condensate water, can prevent the heat energy loss in the exhaust steam, the utilization efficiency of the energy is improved, thereby realize the cascade utilization of energy, and simultaneously, at condensate water deoxidization in-process, because the exhaust steam of water-feeding pump steam turbine 400 exhaust heats the condensate water, need not to introduce high parameter's steam or hydrophobic, thereby prevent to introduce the deoxidization with high parameter's steam or hydrophobic deoxidization and hold chamber 310, and then can avoid the loss and the waste of the energy, finally improve thermal power system's economic benefits and energy comprehensive utilization efficiency, realize energy saving and consumption reduction's effect.
As described above, the condensed water and the exhaust steam are mixed in the oxygen removal accommodating cavity 310, so that the exhaust steam heats the condensed water, and further the purpose of removing oxygen is achieved, in order to enable the exhaust steam to be mixed with the condensed water more fully, in an alternative embodiment, the oxygen removal device 300 may include a housing 320 and a spraying device 330, the housing 320 may enclose the oxygen removal accommodating cavity 310, the spraying device 330 may be disposed in the oxygen removal accommodating cavity 310, and an outlet of the air cooling unit 200 is connected with the spraying device 330 through the second pipeline 520. In specific working process, the condensate passes through spray set 330 blowout to the area that makes condensate and exhaust steam contact is great, thereby can make condensate and exhaust steam mix comparatively fully, so that exhaust steam can heat the condensate betterly, and then makes the deoxidization effect of condensate better, further reduces the oxygen content in the condensate.
Specifically, the connection between the third pipe 530 and the oxygen removing accommodating chamber 310 may be located below the spraying device 330, and during a specific operation, the condensed water sprayed from the spraying device 330 flows downward, and the exhaust steam located below the spraying device 330 flows upward, so that the condensed water and the exhaust steam are more fully mixed. Alternatively, the spraying direction of the spraying device 330 may be toward the top end of the deaerator 300, so that the contact time of the condensed water sprayed from the spraying device 330 with the exhaust steam may be longer, thereby enabling the exhaust steam to heat the condensed water better. Of course, while the condensate water deoxidizing effect is ensured to be good, the spraying direction of the spraying device 330 may also be toward the bottom end of the deoxidizing device 300. The top end and the bottom end of the oxygen removing device 300 refer to both ends of the oxygen removing device 300 in the height direction, and the height of the top end is greater than that of the bottom end.
Further, the spraying device 330 may have a plurality of nozzles so that the capacity of the deaerator 300 is high, that is, the deaerator 300 can simultaneously deaerate a large amount of condensed water.
In an alternative embodiment, the oxygen removing device 300 may further include a liquid level detecting device 340, and the liquid level detecting device 340 is disposed outside the housing 320. The liquid level detection device 340 can measure the liquid level of the condensed water in the deoxidizing holding cavity 310, and the staff can obtain the liquid level of the condensed water in the deoxidizing holding cavity 310 through the liquid level detection device 340, so that the staff can conveniently control the amount of the condensed water in the deoxidizing holding cavity 310, and the poor deoxidizing effect of the condensed water caused by the fact that the condensed water in the deoxidizing holding cavity 310 is more is prevented.
Optionally, the liquid level detection device 340 is a liquid level meter, and is convenient to set because of simple structure of the liquid level meter, so that the structure of the deaerating device 300 can be simplified, the design difficulty of designers can be reduced, and meanwhile, the cost of the liquid level meter is lower, so that the cost of the deaerating device 300 can be reduced, and further the cost of a condensed water deaerating system can be reduced. Further, the liquid level detection device 340 may have an alarm function, and when the liquid level of the condensed water in the deoxygenation containing cavity 310 exceeds a preset water level, the liquid level detection device 340 alarms to further facilitate the control of the amount of the condensed water in the deoxygenation containing cavity 310 by the staff.
In order to avoid the deoxygenated condensed water remaining in the deoxygenation containment chamber 310, the condensed water deoxygenation system may optionally further include a water tank 600, and the outlet of the deoxygenation device 300 may be in communication with the water tank 600 through a fourth conduit 540. In specific working process, the condensate water after the deoxidization in the deoxidization holding chamber 310 can flow into water tank 600 through fourth pipeline 540, prevents that the condensate water after the deoxidization from continuing to stop in deoxidization holding chamber 310 to the condensate water after the deoxidization can be avoided and mixed with the condensate water of not deoxidization in deoxidization holding chamber 310, and then prevent that the condensate water from dissolving oxygen once more, finally improve the deoxidization effect of condensate water.
Specifically, the fourth conduit 540 may communicate with the oxygen-removing accommodating chamber 310 at a plurality of positions, that is, the outlet of the oxygen-removing device 300 may be located at a plurality of positions, for example, the side wall of the oxygen-removing device 300. Alternatively, the deaerator 300 may have a bottom end, the outlet of the deaerator 300 is located at the bottom end, and due to the action of gravity, the condensed water after deaerating is collected at the bottom end of the deaerator 300, so that the condensed water after deaerating can conveniently flow into the water tank 600 through the outlet located at the bottom end, and the condensed water after deaerating in the deaerator accommodating chamber 310 is prevented from flowing into the water tank 600 through the outlet more difficultly, and further the condensed water after deaerating is prevented from continuously staying in the deaerator accommodating chamber 310.
In the condensate water deoxygenation process, the exhaust steam may be accumulated in the deoxygenation accommodating cavity 310 after the condensate water is heated, so that the pressure in the deoxygenation accommodating cavity 310 is high, and further the exhaust steam discharged by the feed water pump turbine 400 is difficult to enter the deoxygenation accommodating cavity 310. Based on this, in an alternative embodiment, the deoxidizing holding cavity 310 may be communicated with the inlet of the air cooling unit 200 through the fifth pipeline 550, so that the exhaust steam flows into the air cooling unit 200 through the fifth pipeline 550 after the condensed water is heated, and the exhaust steam is prevented from being accumulated in the deoxidizing holding cavity 310 after the condensed water is heated, thereby avoiding a high pressure in the deoxidizing holding cavity 310, so that the exhaust steam exhausted by the water feed pump turbine 400 can continuously enter the deoxidizing holding cavity 310, so that the exhaust steam can better heat the condensed water, and further the deoxidizing effect of the condensed water is better.
Further, the oxygen scavenging device 300 may have a top end where the oxygen scavenging containment chamber 310 may be in communication with the fifth conduit 550. Since the dead steam generally flows upward, the dead steam is generally collected at the top end of the oxygen removing device 300, so that the dead steam can easily flow into the air cooling unit 200 through the fifth pipe 550 at the top end, the dead steam in the oxygen removing accommodating chamber 310 is prevented from being difficult to flow into the air cooling unit 200 through the fifth pipe 550, and the dead steam is further prevented from being collected in the oxygen removing accommodating chamber 310 after the condensed water is heated.
In order to prevent steam in the air cooling unit 200 from flowing back into the oxygen removal accommodating chamber 310, the fifth pipeline 550 may be provided with a check valve in the flow direction from the oxygen removal accommodating chamber 310 to the inlet of the air cooling unit 200. This check valve only can make the dead steam flow that the deoxidization held in the chamber 310 to air cooling unit 200, prevents among the air cooling unit 200 that steam refluences to the deoxidization holds the chamber 310, and the steam that refluences to the deoxidization holds in the chamber 310 is relatively poor to the heating effect of condensate water, consequently, steam refluence is held to the deoxidization in the chamber 310 to can prevent the deoxidization effect of condensate water relatively poor in preventing the air cooling unit 200 to make condensate water deoxidization system can operate steadily.
In order to further improve the condensate water oxygen removal effect, in an alternative embodiment, the third pipeline 530 may be provided with a steam temperature detection device, the second pipeline 520 may be provided with a flow regulating valve, and the condensate water oxygen removal system may further include a control device, and both the flow regulating valve and the steam temperature detection device may be electrically connected with the control device. In specific working process, steam temperature detection device detects the temperature of exhaust steam, then transmits the temperature value to controlling means, and controlling means is according to temperature value control flow control valve to the exhaust steam that makes to get into the deoxidization and hold the chamber 310 and the aqueous phase adaptation that condenses that gets into the deoxidization and hold the chamber 310, thereby makes the exhaust steam can heat the condensate better, further improves the deoxidization effect of condensate.
Of course, the third pipeline 530 may also be provided with a vapor amount detection device, and the vapor amount detection device may also be electrically connected with the control device. Since the temperature of the exhaust steam discharged from the feed pump turbine 400 is generally stable, the amount of heat carried by the exhaust steam can be calculated by measuring the flow rate of the exhaust steam.
Based on the condensate water deoxidization system that this application embodiment disclosed, this application embodiment still discloses a thermal power system, the thermal power system that discloses includes arbitrary embodiment of the above condensate water deoxidization system to make the thermal power system can utilize the exhaust steam of feed pump steam turbine 400 exhaust to carry out the deoxidization of condensate water, can prevent the heat energy loss in the exhaust steam, improve the utilization efficiency of energy, thereby realize the cascade utilization of energy, simultaneously, at condensate water deoxidization in-process, need not to introduce the steam or the drainage of high parameter, and then can avoid the loss and the waste of the energy, finally improve the economic benefits and the energy comprehensive utilization efficiency of thermal power system, realize energy saving and consumption reduction's effect.
In the embodiments of the present application, the difference between the embodiments is described in detail, and different optimization features between the embodiments can be combined to form a better embodiment as long as the differences are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The utility model provides a condensate water deoxidization system which characterized in that, includes turboset (100), air cooling unit (200), deaerator (300) and feed pump steam turbine (400), deaerator (300) have the deoxidization and hold chamber (310), wherein:
the steam extraction mouth of steam turbine unit (100) through first pipeline (510) with the import of air cooling unit (200) is linked together, the export of air cooling unit (200) through second pipeline (520) with chamber (310) intercommunication is held to the deoxidization, the steam extraction mouth of feed water pump steam turbine (400) through third pipeline (530) with chamber (310) intercommunication is held to the deoxidization.
2. The condensate deoxygenation system of claim 1, wherein the deoxygenation device (300) comprises a housing (320) and a spraying device (330), the housing (320) encloses the deoxygenation accommodating cavity (310), the spraying device (330) is disposed in the deoxygenation accommodating cavity (310), and an outlet of the air cooling unit (200) is connected to the spraying device (330) through the second pipeline (520).
3. The condensate deoxygenation system of claim 2, wherein the deoxygenation device (300) further comprises a liquid level detection device (340), the liquid level detection device (340) being disposed outside the housing (320).
4. The condensate deoxygenation system of claim 3, wherein the liquid level detection device (340) is a liquid level meter.
5. The condensate deoxygenation system of claim 1, further comprising a water tank (600), wherein the outlet of the deoxygenation device (300) is in communication with the water tank (600) via a fourth conduit (540).
6. The condensate deoxygenation system of claim 5, wherein the deoxygenation device (300) has a bottom end, and an outlet of the deoxygenation device (300) is located at the bottom end.
7. The condensate deoxygenation system of claim 1, wherein the deoxygenation device (300) has a top end, the deoxygenation containment chamber (310) is in communication with an inlet of the air cooling unit (200) via a fifth conduit (550), and the communication of the deoxygenation containment chamber (310) with the fifth conduit (550) is located at the top end.
8. The condensate deoxygenation system of claim 7, wherein the fifth conduit (550) is provided with a check valve in the flow direction from the deoxygenation containment chamber (310) to the inlet of the air cooling unit (200).
9. The condensate deoxygenation system of claim 1, wherein the third pipeline (530) is provided with a vapor temperature detection device and/or a vapor amount detection device, the second pipeline (520) is provided with a flow control valve, and the condensate deoxygenation system further comprises a control device, and the flow control valve, the vapor temperature detection device, and/or the vapor amount detection device are electrically connected to the control device.
10. A thermal power generation system characterized by comprising the condensed water oxygen removal system according to any one of claims 1 to 9.
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| CN202021369828.1U CN212805605U (en) | 2020-07-13 | 2020-07-13 | Condensate water deoxidization system and thermal power system |
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| CN202021369828.1U CN212805605U (en) | 2020-07-13 | 2020-07-13 | Condensate water deoxidization system and thermal power system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117682593A (en) * | 2024-02-02 | 2024-03-12 | 广东美的暖通设备有限公司 | Negative pressure self-deoxidizing equipment and control system and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117682593A (en) * | 2024-02-02 | 2024-03-12 | 广东美的暖通设备有限公司 | Negative pressure self-deoxidizing equipment and control system and control method thereof |
| CN117682593B (en) * | 2024-02-02 | 2024-05-07 | 广东美的暖通设备有限公司 | Negative pressure self-deoxidizing equipment and control system and control method thereof |
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