CN219037667U - Vacuum optimizing device for direct air cooling unit of thermal power plant - Google Patents
Vacuum optimizing device for direct air cooling unit of thermal power plant Download PDFInfo
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- CN219037667U CN219037667U CN202223114478.6U CN202223114478U CN219037667U CN 219037667 U CN219037667 U CN 219037667U CN 202223114478 U CN202223114478 U CN 202223114478U CN 219037667 U CN219037667 U CN 219037667U
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Abstract
The utility model discloses a vacuum optimizing device of a direct air cooling unit of a thermal power plant, which is used for controlling and adjusting the vacuum degree of a balance air cooling unit in a constant vacuum degree range and comprises the following components: the steam distributing pipe is fixedly connected with an exhaust manifold of the steam turbine, and the steam flowing through the steam distributing pipe is uniformly distributed through the inner part of the pipeline. The countercurrent warming adjusting sub-device is in communication connection with the DCS control system, is connected with the exhaust manifold, receives an adjusting instruction of the DCS control system, performs linkage control and adjusts the temperature of the outlet of the air exhaust pipe of the air cooler so as to adjust the vacuum degree of the air cooler unit within a threshold range. The steam flowing through the inside of the steam distributing pipe is evenly distributed through the steam distributing pipe, so that the two sides of the exhaust manifold are used for conveying the steam with the same flow rate, and the same temperature and pressure in the two side forward-flow pipe bundles and the two side backward-flow pipe bundles are maintained. Meanwhile, the countercurrent warming regulator device receives a regulating instruction of the DCS control system, and supplements steam from the exhaust manifold into the air cooling unit to regulate the temperature, so that the purpose of regulating the vacuum degree of the air cooling unit is realized.
Description
Technical Field
The utility model relates to the technical field of vacuum degree adjustment of direct air cooling systems of thermal power plants, in particular to a vacuum optimizing device of a direct air cooling unit of a thermal power plant.
Background
The direct air cooling system of the thermal power plant is a regenerative system that exhaust steam of a steam turbine is sent into an air cooling condenser arranged outdoors through a coarse exhaust steam pipeline, an axial flow cooling fan enables air to flow through the outer surface of a radiator, the exhaust steam is cooled into water, and condensed water is returned to the steam turbine through a condensation pump.
The specific working principle of the direct air cooling system is as follows: exhaust steam discharged by the steam turbine enters the concurrent tube bundle through the exhaust pipeline and the steam distribution pipeline. The axial flow fan works in the air to force to blow, the air flows outside the downstream tube bundle, the steam is condensed into water in the air tube bundle, the non-condensable gas is discharged through a vacuumizing pipeline after being vacuumized by a vacuum pump, the condensed water is collected into a condensed water collecting box or a hot well, and the condensed water is output to a boiler through a condensed water pump or a condensed water pump after flowing out, so that the recycling is realized.
When the air cooling unit is started in winter, the steam flow and the heat load of the air cooling unit must meet the process requirements, especially when the direct air cooling system is started to operate under extreme climate conditions, the pressure of the direct air cooling system is reduced below a certain critical limiting value, the capacity of the vacuumizing system may be reduced, the non-condensable gas in the condenser is increased, so that the condensed water is supercooled, the vacuumizing capacity of the vacuum pump is reduced, the vacuum degree of the air cooling system is disturbed, and the constant threshold value range is difficult to maintain.
Disclosure of Invention
In order to solve the technical problem that the vacuum degree of the air cooling system is difficult to maintain in a constant threshold range, the utility model provides a vacuum optimizing device for a direct air cooling unit of a thermal power plant, and the vacuum degree of the air cooling unit is regulated in a constant range through a steam distributing pipe and a countercurrent warming regulator device.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
a direct air cooling unit vacuum optimizing device of thermal power plant for control and regulation balanced air cooling unit vacuum is in invariable vacuum degree scope, includes:
and the steam distributing pipe is fixedly connected with an exhaust manifold of the steam turbine and is used for distributing steam flowing through the steam distributing pipe.
The countercurrent warming adjusting sub-device is in communication connection with the DCS control system and is connected with the exhaust manifold and used for receiving an adjusting instruction of the DCS control system, and the temperature of the outlet of the exhaust pipe of the air cooler is controlled and adjusted in a linkage manner so as to adjust the vacuum degree of the air cooler unit within a threshold range.
Compared with the prior art, the utility model has the following advantages: the steam flowing through the inside of the steam distributing pipe is evenly distributed through the steam distributing pipe, so that the two sides of the exhaust manifold are used for conveying the steam with the same flow rate, and the same temperature and pressure in the two side forward-flow pipe bundles and the two side backward-flow pipe bundles are maintained. Meanwhile, the countercurrent warming regulator device receives a regulating instruction of the DCS control system, and supplements steam from the exhaust manifold into the air cooling unit to regulate the temperature, so that the purpose of regulating the vacuum degree of the air cooling unit is realized.
Further preferably, the counter-flow warming adjustment sub-device comprises:
the countercurrent temperature control assembly is fixedly connected with the exhaust manifold and is in communication connection with the DCS control system and is used for receiving an air extraction temperature adjustment instruction of the DCS control system, controlling the temperature of the exhaust pipe in a linkage manner and further adjusting the vacuum degree of the air cooling unit.
And the tempering control assembly is in communication connection with the DCS control system and is used for receiving a tempering temperature control instruction of the DCS control system, assisting in adjusting the temperature of the exhaust pipe and further adjusting the vacuum degree of the air cooling unit.
By adopting the technical scheme, the steam of the exhaust manifold is respectively supplemented into the countercurrent tube bundle in the air cooling unit through the countercurrent temperature control assembly, so that the temperature in the countercurrent tube bundle and the temperature of the outlet of the exhaust tube are improved, the air pumping capacity of the exhaust pump is improved, the transmission of air pumping temperature regulation instructions is carried out before the temperature return assembly and the DCS, the internal formation of heat reflux of the countercurrent tube bundle is realized, the temperature return is carried out, the temperature return assembly and the DCS are mutually cooperated, and finally the vacuum degree of the air cooling unit is controlled and regulated within a constant threshold range.
It is further preferred that the counter flow temperature control assembly comprises:
and the balance manifold is positioned on the pipeline of the exhaust manifold and connected with the exhaust manifold for accessing the steam flowing through the exhaust manifold.
The balance branch pipe is arranged on the balance main pipe, the inlet end of the balance branch pipe is fixedly connected with the balance main pipe, and the outlet end of the balance branch pipe is connected with the countercurrent pipe bundle and is used for supplementing steam of the exhaust main pipe into the countercurrent pipe bundle so as to increase the temperature and the pressure of noncondensable gas in the countercurrent pipe bundle.
The countercurrent temperature control valve is arranged on a pipeline of the balance main pipe and is used for increasing or reducing the flow of steam flowing through the exhaust main pipe through the valve opening, so that the temperature and the pressure in the countercurrent tube bundle are regulated.
The countercurrent controller is in control connection with the countercurrent temperature control valve, is in communication connection with the DCS control system, and is used for receiving the air extraction temperature adjustment instruction and controlling the valve position opening of the countercurrent temperature control valve so as to adjust the temperature in the countercurrent tube bundle.
By adopting the technical scheme, the countercurrent controller controls the countercurrent temperature control valve to act to open different valve positions, so that a small part of steam of the exhaust manifold enters the balance branch pipe through the balance manifold and finally enters the countercurrent pipe bundle, thereby improving the temperature in the countercurrent pipe bundle and the temperature of the exhaust pipe, improving the vacuumizing capacity of the exhaust pump and realizing the control and regulation of the vacuum degree of the air cooling unit.
Further preferably, the warming control assembly includes:
a reversible fan disposed in the counter-current tube bundle for recovering heat through the counter-rotation to the counter-current tube bundle.
And one end of the return heating controller is in control connection with the reversible fan, and the other end of the return heating controller is in communication connection with the DCS control system and is used for receiving a return heating temperature control instruction so as to control the reversible fan to rotate reversely and further adjust the temperature in the countercurrent tube bundle.
By adopting the technical scheme, the reversing fan is controlled by the warming controller to reverse the flow of heat in the countercurrent tube bundle, so that the problem that the temperature of the air extraction opening of the countercurrent tube bundle is too low is solved, and the temperature in the countercurrent tube bundle is prevented from being reduced.
Further preferably, the reversible fan is a reversible fan.
By adopting the technical scheme, the heat circulation can be formed in the countercurrent tube bundle when the fan rotates forwards in a reversing way, and the countercurrent tube bundle is subjected to warming protection when the fan rotates reversely.
It is further optimized that a splitter plate is arranged in the steam distributing pipe, one end of the splitter plate is connected with an inlet of the steam distributing pipe, the other end of the splitter plate is connected with an outlet of the steam distributing pipe, and the splitter plate divides an internal cavity of the steam distributing pipe into two parts so that steam flowing through the splitter plate uniformly enters the downstream pipe bundles on two sides of the steam distributing pipe in two paths.
By adopting the technical scheme, the steam flowing through the steam distributing pipe is equally divided into the concurrent pipe bundles at the two sides, and the steam supplying guarantee is provided for maintaining the stable vacuum degree state of the unit.
Further preferably, the manifold is co-axial with the steam distribution pipe.
By adopting the technical scheme, the purpose of uniformly distributing steam in the whole pipeline of the steam distributing pipe is achieved.
Further preferably, the cross section of the flow dividing plate is either S-shaped or I-shaped.
By adopting the technical scheme, the S-shaped flow distribution plate can enable steam to smoothly flow into the concurrent tube bundle along the shape of the flow distribution plate, and the I-shaped flow distribution plate can rapidly send steam into the concurrent tube bundle.
Further preferably, the exhaust pipe is provided with an exhaust thermometer, and the exhaust thermometer is connected with the countercurrent temperature control assembly in an interlocking control manner.
By adopting the technical scheme, the temperature in the exhaust pipe is regulated by means of linkage control, and an accurate judgment basis is provided for regulating the vacuum degree of the air cooling unit.
Drawings
Fig. 1 is a schematic diagram of the process of this embodiment.
Fig. 2 is a schematic diagram of an optimization flow chart in the present embodiment.
Fig. 3 is an enlarged schematic view of the structure shown in fig. 2A.
Reference numerals: 1-a steam turbine; 2-an exhaust manifold; 3-a hydrophobic pipe; 4-a condenser; 5-condensate delivery pipe; 6, an exhaust pipe; 7-a steam distribution pipe; 71-a splitter plate; 8-a countercurrent temperature control assembly; 81-a reverse flow controller; 82-a countercurrent thermostatted valve; 83-balancing a main pipe; 84-balancing the branch pipes; 9-an axial flow fan; a 10-DCS control system; 11-concurrent tube bundles; 12-countercurrent tube bundles; 13-reversible fans; 14-a vacuum pump; 15-condensate recovery pipes; 16-a warming controller; 17-pumping thermometer.
Detailed Description
Exhaust steam discharged by the steam turbine enters the concurrent tube bundle through the exhaust pipeline and the steam distribution pipeline. The axial flow fan works in the air to force to blow, the air flows outside the downstream tube bundle, the steam is condensed into water in the air tube bundle, the non-condensable gas is discharged through a vacuumizing pipeline after being vacuumized by a vacuum pump, the condensed water is collected into a condensed water collecting box or a hot well, and the condensed water is output to a boiler through a condensed water pump or a condensed water pump after flowing out, so that the recycling is realized.
When the air cooling unit is started in winter, the steam flow and the heat load of the air cooling unit must meet the process requirements, especially when the direct air cooling system is started to operate under extreme climate conditions, the pressure of the direct air cooling system is reduced below a certain critical limiting value, the capacity of the vacuumizing system may be reduced, the non-condensable gas in the condenser is increased, so that the condensed water is supercooled, the vacuumizing capacity of the vacuum pump is reduced, the vacuum degree of the air cooling system is disturbed, and the constant threshold value range is difficult to maintain.
The present utility model is described in further detail below with reference to fig. 1, 2 and 3.
A direct air cooling unit vacuum optimizing device of a thermal power plant, as shown in figure 1, is used for controlling and adjusting the vacuum degree of a balance air cooling unit within a constant vacuum degree range, and comprises:
the steam distributing pipe 7 is fixedly connected with the exhaust manifold 2 of the steam turbine 1 and is used for distributing and equally dividing steam flowing through the steam distributing pipe.
And one end of the drain pipe 3 is connected with the exhaust manifold 2, the other end of the drain pipe is connected with the condenser 4, an outlet of the condenser 4 is connected with the condensate conveying pipe 5, the drain pipe 3 is used for discharging condensate directly attached to the exhaust manifold 2 into the condenser 4, and the condensate is discharged into a condensate pipe network for concentrated recovery through the condensate conveying pipe 5 after heat exchange and temperature reduction of the condensate through the condenser 4.
The countercurrent warming adjusting sub-device is in communication connection with the DCS control system 10, is connected with the exhaust manifold 2 and is used for receiving an adjusting instruction of the DCS control system 10, and the temperature of the outlet of the group exhaust pipe 6 of the air cooler is controlled and adjusted in a linkage manner so as to adjust the vacuum degree of the air cooler unit within a threshold range.
The steam flowing through the inside of the steam distribution pipe 7 is evenly distributed, so that the two sides of the exhaust manifold 2 are used for conveying the steam with the same flow rate, and the same temperature and pressure in the forward flow pipe bundle 11 and the backward flow pipe bundle 12 at the two sides are maintained. Meanwhile, the countercurrent warming regulator device receives the regulating instruction of the DCS control system 10, and supplements steam from the exhaust manifold 2 into the air cooling unit to regulate the temperature, thereby realizing the purpose of regulating the vacuum degree of the air cooling unit.
Specifically, as shown in fig. 1 and 2, the counter-flow warming adjustment sub-device in this embodiment includes:
the countercurrent temperature control assembly 8 is fixedly connected with the exhaust manifold 2 and is in communication connection with the DCS control system 10, and is used for receiving an air extraction temperature adjustment instruction of the DCS control system 10, controlling the temperature of the air extraction pipe 6 in a linkage manner, and further adjusting the vacuum degree of the air cooling unit.
And the tempering control component is in communication connection with the DCS control system 10 and is used for receiving a tempering temperature control instruction of the DCS control system 10, assisting in adjusting the temperature of the exhaust pipe 6 and further adjusting the vacuum degree of the air cooling unit.
The steam of the exhaust manifold 2 is respectively supplemented into a countercurrent tube bundle 12 in the air cooling unit through the countercurrent temperature control assembly 8, so that the temperature in the countercurrent tube bundle 12 and the temperature of an outlet of the exhaust tube 6 are improved, the air exhausting capability of the exhaust pump is improved, the transmission of air exhausting temperature regulation instructions is carried out before the tempering temperature assembly and the DCS, the tempering is carried out by forming heat backflow in the countercurrent tube bundle 12, the tempering is carried out by the tempering temperature regulation instructions, and finally the control and the regulation of the vacuum degree of the air cooling unit are realized within a constant threshold range.
Specifically, the countercurrent temperature control assembly 8 in this embodiment includes:
a balance manifold 83, which is located on the piping of the exhaust manifold 2, is connected to the exhaust manifold 2 for accessing the steam flowing through the exhaust manifold 2.
The countercurrent temperature control valve 82 is arranged on the pipeline of the balance manifold 83 and is used for increasing or decreasing the flow rate of steam flowing through the exhaust manifold 2 through valve opening, so as to adjust the temperature and the pressure in the countercurrent tube bundle 12.
The countercurrent controller 81 is in control connection with the countercurrent temperature control valve 82, is in communication connection with the DCS control system 10, and is used for receiving the air extraction temperature adjustment instruction, and controlling the valve position opening of the countercurrent temperature control valve 82 so as to adjust the temperature in the countercurrent tube bundle 12.
The counter-flow controller 81 controls the counter-flow temperature control valve 82 to act to open different valve positions, so that a small part of steam of the exhaust manifold 2 enters the balance branch pipe 84 through the balance manifold 83 and finally enters the counter-flow tube bundle 12, the temperature in the counter-flow tube bundle 12 and the temperature of the exhaust tube 6 are increased, the vacuumizing capacity of the exhaust pump is improved, and the vacuum degree of the air cooling unit is controlled and regulated.
Specifically, the heating control assembly in this embodiment includes:
a reversible fan 13 is provided in the counterflow tube bundle 12 for recovering heat by reversing to the counterflow tube bundle 12. The countercurrent tube bundle 12 is connected with a condensate recovery tube 15, an inlet of the condensate recovery tube 15 is preset to be connected with the countercurrent tube bundle 12, an outlet of the countercurrent tube bundle is connected with the condenser 4, the countercurrent tube bundle 12 is used for recovering condensate subjected to air cooling into the condenser 4 through the condensate recovery tube 15, and the condensate is discharged to a condensate pipe network through the condensate conveying tube 5 after heat exchange with condensate from the drain tube 3.
And a return-heating controller 16, one end of which is in control connection with the reversible fan 13, and the other end of which is in communication connection with the DCS control system 10, for receiving return-heating temperature control instructions to control the reversible fan 13 to rotate reversely, thereby adjusting the temperature in the countercurrent tube bundle 12.
The reversing fan 13 is controlled by the warming controller 16 to form heat reflux in the countercurrent tube bundle 12 through reversing, so that the problem that the temperature of the extraction opening of the countercurrent tube bundle 12 is too low is overcome, and the temperature in the countercurrent tube bundle 12 is prevented from being reduced.
Specifically, the reversible fan 13 in this embodiment is a reversible fan.
When the reversing fan 13 rotates forward, a thermal cycle can be formed in the countercurrent tube bundle 12, and when the reversing fan rotates backward, the countercurrent tube bundle 12 is subjected to warming protection.
Specifically, a splitter plate 71 is disposed in the steam distribution pipe 7 in this embodiment, one end of the splitter plate 71 is connected to an inlet of the steam distribution pipe 7, and the other end is connected to an outlet of the steam distribution pipe 7, and the splitter plate 71 divides the internal cavity of the steam distribution pipe 7 into two parts, so that the flowing steam enters the downstream tube bundles 11 on both sides of the steam distribution pipe 7 in two paths.
Therefore, the steam flowing through the steam distributing pipe 7 is equally distributed into the concurrent pipe bundles 11 at the two sides, and the steam supplying guarantee is provided for maintaining the stable vacuum degree state of the unit.
Specifically, as shown in fig. 2 and 3, the flow dividing plate 71 in the present embodiment is coaxial with the steam distribution pipe 7. So that the steam distribution pipe 7 can uniformly distribute steam in the whole pipeline.
Specifically, as shown in fig. 2 and 3, the cross section of the flow dividing plate 71 in the present embodiment is either S-shaped or I-shaped. The S-shaped section of the flow dividing plate 71 can enable steam to smoothly flow into the concurrent tube bundle 11 along the shape of the flow dividing plate 71, and the I-shaped section of the flow dividing plate 71 can enable steam to be quickly fed into the concurrent tube bundle 11.
Specifically, the exhaust pipe 6 in this embodiment is provided with an exhaust thermometer 17, and the exhaust thermometer 17 is connected with the countercurrent temperature control assembly 8 in an interlocking control manner. Therefore, the temperature in the exhaust pipe 6 is regulated by linkage control, and an accurate judgment basis is provided for regulating the vacuum degree of the air cooling unit.
Referring to fig. 1, the process of controlling and adjusting the vacuum degree of the balance air cooling unit within the constant vacuum degree range is described as follows:
steam exhaust steam from a steam turbine enters the exhaust manifold 2, condensate directly attached to the steam exhaust steam directly flows through the water drain pipe 3 and enters the condenser 4, uncondensed steam exhaust steam enters the steam distribution pipe 7 and is divided into two paths by the flow dividing plate 71 and respectively enters the concurrent pipe bundles 11 on two sides, the axial flow fan 9 sends air and cold air to the concurrent pipe bundles 11 to reduce the temperature of steam in the concurrent pipe bundles, most of the steam is cooled to form condensate and flows into the condenser 4 from the condensate conveying pipe 5, and a small amount of uncondensed non-condensate enters the exhaust pipe 6 through the countercurrent pipe bundles 12 and then enters the vacuum pump 14, so that the vacuum degree of the whole air cooling unit is maintained under the vacuumizing effect of the vacuum pump 14. When the temperature in the countercurrent tube bundle 12 is too low, the temperature from the outlet of the air extraction tube 6 to the vacuum pump 14 is too low, so that the vacuum degree is influenced, at the moment, the countercurrent temperature control valve 82 is controlled by the countercurrent controller 81 to act to open different valve positions, so that a small part of steam of the exhaust manifold 2 enters the balance branch tube 84 through the balance manifold 83 and finally enters the countercurrent tube bundle 12, the temperature in the countercurrent tube bundle 12 and the temperature of the air extraction tube 6 are improved, the vacuumizing capacity of the air extraction pump is improved, and the vacuum degree of the air cooling unit is controlled and regulated.
In summary, the steam distribution pipe 7 distributes the steam flowing through the inside of the steam distribution pipe evenly, so that the two sides of the exhaust manifold 2 are provided with the steam with the same flow rate, and the same temperature and pressure in the forward flow pipe bundle 11 and the backward flow pipe bundle 12 at the two sides are maintained. Meanwhile, the countercurrent warming regulator device receives the regulating instruction of the DCS control system 10, and supplements steam from the exhaust manifold 2 into the air cooling unit to regulate the temperature, thereby realizing the purpose of regulating the vacuum degree of the air cooling unit.
The present embodiment is merely illustrative of the utility model and is not intended to limit the utility model, and those skilled in the art, after having read the present specification, may make modifications to the embodiment without creative contribution as required, but are protected by patent laws within the protection scope of the present utility model.
Claims (9)
1. The utility model provides a direct air cooling unit vacuum optimizing device of thermal power plant for control adjusts balanced air cooling unit vacuum in invariable vacuum degree scope, its characterized in that includes:
the steam distribution pipe (7) is fixedly connected with the exhaust manifold (2) of the steam turbine (1) and is used for distributing steam flowing through the steam distribution pipe;
the countercurrent warming adjusting sub-device is in communication connection with the DCS control system (10), is connected with the exhaust manifold (2) and is used for receiving an adjusting instruction of the DCS control system (10), and the temperature of the outlet of the air exhaust pipe (6) of the air cooler is controlled and adjusted in a linkage manner so as to adjust the vacuum degree of the air cooler unit within a threshold range.
2. The direct air cooling unit vacuum optimizing device of thermal power plant according to claim 1, wherein the counter-flow warming regulator device comprises:
the countercurrent temperature control assembly (8) is fixedly connected with the exhaust manifold (2), is in communication connection with the DCS control system (10) and is used for receiving an air extraction temperature adjustment instruction of the DCS control system (10), controlling the temperature of the air extraction pipe (6) in a linkage manner, and further adjusting the vacuum degree of the air cooling unit;
and the tempering control assembly is in communication connection with the DCS control system (10) and is used for receiving a tempering temperature control instruction of the DCS control system (10), assisting in adjusting the temperature of the exhaust pipe (6) and further adjusting the vacuum degree of the air cooling unit.
3. The direct air cooling unit vacuum optimizing device of a thermal power plant according to claim 2, characterized in that the countercurrent temperature control assembly (8) comprises:
a balance manifold (83) which is positioned on the pipeline of the exhaust manifold (2) and is connected with the exhaust manifold (2) for accessing the steam flowing through the exhaust manifold (2);
the balance branch pipes (84) are arranged on the balance header pipe (83), the inlet ends of the balance branch pipes are fixedly connected with the balance header pipe (83), and the outlet ends of the balance branch pipes are connected with the countercurrent tube bundles (12) and are used for supplementing steam of the exhaust header pipe (2) into the countercurrent tube bundles (12) so as to increase the temperature and the pressure of noncondensable gas in the countercurrent tube bundles (12);
the countercurrent temperature control valve (82) is arranged on a pipeline of the balance header pipe (83) and is used for increasing or reducing the flow rate of steam flowing through the exhaust header pipe (2) through valve opening so as to adjust the temperature and the pressure in the countercurrent tube bundle (12);
the countercurrent controller (81) is in control connection with the countercurrent temperature control valve (82), is in communication connection with the DCS control system (10) and is used for receiving an air extraction temperature adjustment instruction, and the valve position opening of the countercurrent temperature control valve (82) is controlled so as to adjust the temperature in the countercurrent tube bundle (12).
4. The direct air cooling unit vacuum optimizing device of a thermal power plant according to claim 2, wherein the warming control assembly comprises:
a reversible fan (13) disposed in the countercurrent tube bundle (12) for recovering heat by reversing the countercurrent tube bundle (12);
and one end of the warming controller (16) is in control connection with the reversible fan (13), and the other end of the warming controller is in communication connection with the DCS control system (10) and is used for receiving the warming temperature control instruction so as to control the reversible fan (13) to rotate reversely and further adjust the temperature in the countercurrent tube bundle (12).
5. The vacuum optimizing device for the direct air cooling unit of the thermal power plant according to claim 4, wherein the reversible fan (13) is a positive and negative rotating fan.
6. The direct air cooling unit vacuum optimizing device of a thermal power plant according to claim 1, wherein a splitter plate (71) is arranged in the steam distribution pipe (7), one end of the splitter plate (71) is connected with an inlet of the steam distribution pipe (7), the other end of the splitter plate is connected with an outlet of the steam distribution pipe (7), and the splitter plate (71) divides an internal cavity of the steam distribution pipe (7) into two parts so that steam flowing through the splitter plate equally divides two paths into downstream pipe bundles (11) on two sides of the steam distribution pipe (7).
7. The direct air cooling unit vacuum optimizing device of a thermal power plant according to claim 6, characterized in that the splitter plate (71) is coaxial with the steam distribution pipe (7).
8. The direct air cooling unit vacuum optimizing device of thermal power plant according to claim 6, wherein the cross section of the flow dividing plate (71) is either of S-type or I-type.
9. A direct air cooling unit vacuum optimizing device of a thermal power plant according to claim 3, characterized in that an air extraction thermometer (17) is arranged on the air extraction pipe (6), and the air extraction thermometer (17) is connected with the countercurrent temperature control assembly (8) in an interlocking control manner.
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| CN202223114478.6U CN219037667U (en) | 2022-11-23 | 2022-11-23 | Vacuum optimizing device for direct air cooling unit of thermal power plant |
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| CN202223114478.6U CN219037667U (en) | 2022-11-23 | 2022-11-23 | Vacuum optimizing device for direct air cooling unit of thermal power plant |
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