CN218717024U - Device for improving vacuum degree of steam turbine - Google Patents

Abstract

The utility model discloses an improve steam turbine vacuum apparatus, include: the system comprises a steam turbine, a condenser, a first low-pressure heater, an L-shaped pipeline and a first pipeline; the tail end of the steam turbine is connected with the condenser through a pipeline, and the condenser is used for condensing steam into water; the first low-pressure heater is communicated with a first exhaust pipe hole in the steam turbine through a first exhaust pipe, one end of the first pipeline is communicated with a pipeline on the front end of the steam turbine, and the other end of the first pipeline is communicated with the first exhaust pipe; one end of the L-shaped pipeline is communicated with the first exhaust pipe. According to the technical scheme, the temperature of the steam exhaust end of the steam turbine is reduced through the arrangement of the steam turbine, the condenser, the first low-pressure heater and the first pipeline, the vacuum degree is increased, and the steam consumption rate of the steam turbine of the unit is reduced.

Description

Device for improving vacuum degree of steam turbine

Technical Field

The utility model discloses a steam turbine vacuum technology field especially relates to an improve steam turbine vacuum apparatus.

Background

In the prior art, the vacuum value of the extraction condensing turbine is influenced by factors such as design, operation load capacity, long-period operation of the extraction condensing turbine, climate and the like, the vacuum of the extraction condensing turbine cannot meet the production requirement, and the annual average vacuum degree is only maintained at 91-94KPa; the condensing steam turbine runs for a long time, the long-term scouring abrasion of the front steam seal is increased, and the steam leakage quantity of the steam turbine from the front end to the rear end is increased proportionally. Referring to fig. 1, the first pipeline is in a micro-negative pressure state near the rear cylinder, when the load of the steam turbine is lower than 50MW, the steam pressure at the first exhaust pipe hole of the condensing steam turbine is reduced, and most of the leaked steam directly flows backwards through the first pipeline into the rear cylinder of the steam turbine, so that the exhaust steam temperature of the steam turbine is increased, the vacuum degree is reduced, and the steam consumption rate of the steam turbine of the unit is increased.

Because the flow velocity of the rear section of the steam turbine is slow, and a large amount of steam leaks from the air extraction pipe hole of the steam turbine, the flow velocity is slowed down; meanwhile, the pipe resistance is increased due to the bending of the pipeline connecting the rear-section steam turbine and the low-pressure heater, so that the flow speed is further reduced; at the moment, the joint of the rear cylinder and the low-pressure heater is in a micro negative pressure state, and the gas in the low-pressure heater flows back to the rear cylinder of the steam turbine.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the application provides a improve steam turbine vacuum apparatus for steam turbine exhaust temperature reduces, increases the vacuum, reduces unit steam turbine steam consumption rate.

To achieve the above object, the present application provides a steam turbine vacuum enhancement apparatus, comprising: the system comprises a steam turbine, a condenser, a first low-pressure heater, an L-shaped pipeline and a first pipeline;

the tail end of the steam turbine is connected with the condenser through a pipeline, and the condenser is used for condensing steam into water;

the first low-pressure heater is communicated with a first exhaust pipe hole in the steam turbine through a first exhaust pipe, one end of the first pipeline is communicated with a pipeline on the front end of the steam turbine, and the other end of the first pipeline is communicated with the first exhaust pipe;

one end of the L-shaped pipeline is communicated with the first exhaust pipe.

In some embodiments, the other end of the L-shaped pipe communicates with the first pipe.

In some embodiments, further comprising: a pressure equalizing box;

the pressure equalizing box is communicated with the front end of the steam turbine, and the pressure equalizing box is communicated with the rear end of the steam turbine.

In some embodiments, further comprising: the second air exhaust pipe, the third air exhaust pipe, the second low-pressure heater and the third low-pressure heater are arranged on the air exhaust pipe;

the second low-pressure heater is communicated with a second air exhaust pipe hole in the steam turbine through a second air exhaust pipe, and the third low-pressure heater is communicated with a third air exhaust pipe hole in the steam turbine through a third air exhaust pipe;

the second air exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the first air exhaust pipe hole, and the third air exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the second air exhaust pipe hole.

In some embodiments, further comprising: a second pipeline; one end of the second pipeline is communicated with the pipeline on the front end of the steam turbine, and the other end of the second pipeline is communicated with the third exhaust pipe.

In some embodiments, further comprising: a deaerator and a fourth exhaust pipe;

the deaerator is communicated with a fourth exhaust pipe hole in the steam turbine through a fourth exhaust pipe; and the fourth exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the first exhaust pipe hole.

In some embodiments, further comprising: the fifth exhaust pipe, the sixth exhaust pipe, the first high-pressure heater and the second high-pressure heater are arranged in the vacuum chamber;

the first high-pressure heater is communicated with a fifth exhaust pipe hole on the steam turbine through a fifth exhaust pipe, and the second high-pressure heater is communicated with a sixth exhaust pipe hole on the steam turbine through a sixth exhaust pipe;

the fifth exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the first exhaust pipe hole, and the sixth exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the fifth exhaust pipe hole.

In some embodiments, further comprising: a third pipeline; one end of the third pipeline is communicated with the pipeline on the front end of the steam turbine, and the other end of the third pipeline is communicated with the fifth exhaust pipe.

Be different from prior art, above-mentioned technical scheme makes through the setting of steam turbine, condenser, first low pressure feed water heater and first pipeline the steam turbine exhaust end temperature reduces, increases the vacuum, reduces the steam consumption rate of unit steam turbine.

The above description is only an outline of the present application and the technical solution, and the present application can be implemented in accordance with the content of the description so that the technical means of the present application can be more clearly understood, and the detailed description of the present application will be given below so that the above and other objects, features and advantages of the present application can be more clearly understood.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a background art steam turbine;

FIG. 2 is a diagram of a first low pressure heater and a first line configuration according to an embodiment;

fig. 3 is a diagram illustrating the construction of the second low pressure heater, the third low pressure heater and the second line according to the embodiment.

Fig. 4 is a structural diagram of the first pipeline, the second pipeline and the third pipeline according to the embodiment.

FIG. 5 is a block diagram of a turbine vacuum enhancement system according to an embodiment.

Description of reference numerals:

10. a steam turbine; 20. a condenser; 30. a pressure equalizing box; 40. a first low pressure heater; 50. a second low pressure heater; 60. a third low pressure heater; 70. a deaerator; 80. a first high pressure heater; 90. A second high pressure heater;

11. a first extraction duct aperture; 12. a second suction pipe hole; 13. a third suction pipe hole; 14. a fourth suction pipe hole; 15. a fifth suction pipe hole; 16. a sixth gas withdrawal pipe hole;

41. a first exhaust tube;

51. a second extraction tube;

61. a third exhaust tube;

71. a fourth exhaust tube;

81. a fifth exhaust pipe;

91. a sixth exhaust tube;

411. an L-shaped pipeline; 412. a first pipeline;

611. a second pipeline;

811. a third pipeline.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two sets), "plural pieces" refers to two or more (including two pieces).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the prior art, the vacuum value of the extraction condensing turbine 10 is influenced by factors such as design, operation load capacity, long-period operation of the extraction condensing turbine 10, climate and the like, the vacuum of the extraction condensing turbine 10 cannot meet the production requirement, and the annual average vacuum degree is only maintained at 91-94KPa; the extraction condensing turbine 10 operates for a long time, the long-term scouring wear of the front gland seal increases, and the leakage steam volume of the turbine 10 from the front end to the rear end increases proportionally. Referring to fig. 1, when the load of the steam turbine 10 is lower than 50MW, the steam pressure at the first exhaust pipe hole 11 of the extraction condensing steam turbine 10 decreases, and most of the leaked steam flows back to the rear cylinder of the steam turbine 10 through the first pipeline 412, so that the exhaust temperature of the steam turbine 10 increases, the vacuum degree decreases, and the steam consumption rate of the steam turbine 10 of the unit is increased.

Referring to fig. 1-5, the present application provides an apparatus for increasing the vacuum of a steam turbine 10, comprising: a steam turbine 10, a condenser 20, a first low-pressure heater 40, an L-shaped pipeline 411, and a first pipeline 412;

the tail end of the steam turbine 10 is connected with the condenser through a pipeline, and the condenser 20 is used for condensing steam into water;

the first low-pressure heater 40 is communicated with a first extraction pipe hole 11 on the steam turbine 10 through a first extraction pipe 41, one end of the first pipeline 412 is communicated with a pipeline on the front end of the steam turbine 10, and the other end of the first pipeline 412 is communicated with the first extraction pipe 41;

one end of the L-shaped pipeline 411 is communicated with the first suction pipe 41.

Firstly, it should be noted that high-temperature and high-pressure steam enters from the front end of the steam turbine 10 and moves along the steam turbine 10 to the rear end of the steam turbine 10; during the movement of the gas, the gas drives the blades in the turbine 10 to rotate.

Further, the steam turbine 10 is also called a steam turbine engine, and is a rotary steam power device, and high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades in the steam turbine, so that a rotor provided with blade rows rotates, and simultaneously, works outwards. Specifically, the steam turbine 10 is a rotary machine that uses steam as power and converts the thermal energy of the steam into mechanical work.

In fig. 2 to 5, the cross-sectional area of the steam turbine 10 increases from left to right; specifically, the cross-sectional area of the left side of the steam turbine 10 is the smallest, and this section is the front end in this application; the cross-sectional area of the right side of the steam turbine 10 is the largest, and this section is the tail end in this application.

The condenser 20 is a heat exchanger, also called a water recovery device, for condensing the hot steam discharged from the steam turbine 10 into water. The condenser 20 is mainly used in a power plant of the steam turbine 10 and is divided into a water-cooling condenser 20 and an air-cooling condenser 20; the present application prefers water coolers. Further, the condenser 20 is disposed at the tail end of the steam turbine 10 and is used for receiving steam discharged by the steam turbine 10; specifically, the condenser 20 is communicated with the tail end of the steam turbine through a pipeline, high-temperature and high-pressure gas enters the condenser 20 after passing through the steam turbine 10, and the condenser 20 condenses the high-temperature steam into water; the user will reuse the water formed by condensation.

Due to the fact that the steam turbine is abraded greatly and generates air leakage under the long-term operation, the air leakage condition occurs at the tail of the steam turbine 10, and negative pressure is formed at the tail of the steam turbine 10; thereby allowing the hot gas in the first low pressure heater 40 to be drawn back into the steam turbine 10.

The first low pressure heater 40 is used for pumping the steam which does partial work in the steam turbine 10 into the first low pressure heater 40 to heat the water, increasing the temperature of the water, reducing the amount of the steam discharged from the steam turbine 10 to the condenser 20, reducing energy loss and improving the cycle efficiency of the thermodynamic system. That is, in the present application, the first low pressure heater 40 extracts the gas at the rear of the steam turbine 10 and heats the water using the gas at the rear of the steam turbine.

The first extraction pipe hole 11 penetrates through the side wall of the steam turbine 10 and is used for extracting high-temperature steam in the steam turbine 10, the first extraction pipe hole 11 is arranged on the steam turbine 10, and the first low-pressure heater 40 is connected with the first extraction pipe 41 through the first extraction pipe 41.

Two ends of the first pipeline 412 are respectively communicated with the first extraction pipe 41 and the front end pipeline of the steam turbine 10, and are used for guiding the gas at the front end of the steam turbine 10 into the first extraction pipe. A valve is arranged on the first extraction pipe 41 at the joint of the first pipeline 412 and the first extraction pipe 41, which is close to one side of the steam turbine 10; of course, a valve is also provided in the first line 412.

In practical use, there are several cases: firstly, when a user finds that negative pressure exists at the tail end of the steam turbine 10, the valve on the first exhaust pipe 41 can be closed, and the valve on the first pipeline 412 can be opened at the same time; the operation of the first low pressure heater 40 is ensured. The appropriate amount of steam is extracted from the front end of the steam turbine 10 without affecting the heat conversion efficiency of the turbine. Secondly, when the user finds that the tail end of the steam turbine 10 has negative pressure, the first extraction pipe 41 and the valve on the first pipeline 412 can be opened at the same time, so that the gas at the front end of the steam turbine 10 can enter the first low-pressure heater 40 and the tail end of the steam turbine 10. The pipe diameter of the first pipeline 412 is 150mm, and the first pipeline 412 is a carbon steel pipe.

One end of the L-shaped pipeline 411 is communicated with the first extraction pipe 41, and a connection position of the L-shaped pipeline 411 and the first extraction pipe 41 is arranged on a side, away from the steam turbine 10, of a connection position of the first pipeline 412 and the first extraction pipe 41. In other embodiments, referring to fig. 2 to 5, the other end of the L-shaped pipe 411 is connected to the first pipe 412.

According to the technical scheme, the temperature of the steam exhaust end (namely, the tail end) of the steam turbine 10 is reduced through the arrangement of the steam turbine 10, the condenser 20, the first low-pressure heater 40 and the first pipeline 412, the vacuum degree is increased, and the steam consumption rate of the unit steam turbine 10 is reduced. In the present application, the front end of the steam turbine 10 may also be referred to as a front gland seal, and the rear end of the steam turbine 10 may be referred to as a rear gland seal.

According to some embodiments of the present application, referring to fig. 5, further comprising: a pressure equalizing box 30; the pressure equalizing box 30 is communicated with the front end of the steam turbine 10, and the pressure equalizing box 30 is communicated with the rear end of the steam turbine 10.

The pressure equalizing box 30 is disposed across the front end and the tail end of the steam turbine 10, that is, the pressure equalizing box 30 and the front end of the steam turbine 10 and the tail end of the steam turbine 10 are connected to each other.

The pressure equalizing box 30 is used for equalizing pressure, that is, the pressure equalizing box 30 guides steam leaked from the front shaft seal into the rear shaft seal, so that the front shaft seal can be prevented from leaking air outwards, water is carried in oil for a long time, and the rear shaft seal can be prevented from sucking cold air to cause vacuum reduction.

Referring to fig. 3, 4, and 5, according to some embodiments of the present application, further comprising: a second suction pipe 51, a third suction pipe 61, a second low pressure heater 50, and a third low pressure heater 60;

the second low-pressure heater 50 is communicated with a second air exhaust pipe hole 12 on the steam turbine 10 through a second air exhaust pipe 51, and the third low-pressure heater 60 is communicated with a third air exhaust pipe hole 13 on the steam turbine 10 through a third air exhaust pipe 61;

the second air exhaust pipe hole 12 is disposed on one side of the first air exhaust pipe hole close to the front end of the steam turbine 10, and the third air exhaust pipe hole 13 is disposed on one side of the second air exhaust pipe hole close to the front end of the steam turbine 10.

Further, a second pipe 611; one end of the second pipeline 611 is communicated with a pipeline on the front end of the steam turbine 10, and the other end of the second pipeline 611 is communicated with the third extraction pipe 61.

The second low pressure heater 50 is used for pumping the steam which does partial work in the steam turbine 10 into the second low pressure heater 50 to heat the water, increasing the temperature of the water, reducing the amount of the steam discharged from the steam turbine 10 to the condenser 20, reducing the energy loss and improving the cycle efficiency of the thermodynamic system. That is, in the present application, the second low pressure heater 50 extracts gas in the steam turbine 10 and heats water using the gas in the steam turbine.

The second extraction pipe hole 12 penetrates through the side wall of the steam turbine 10 and is used for extracting high-temperature steam in the steam turbine 10, the second extraction pipe hole 12 is arranged on the steam turbine 10, and the second low-pressure heater 50 is connected with the second extraction pipe 51 through the second extraction pipe 51.

The third low pressure heater 60 is used for pumping the steam which does partial work in the steam turbine 10 into the third low pressure heater 60 to heat the water, increasing the temperature of the water, reducing the amount of the steam discharged from the steam turbine 10 to the condenser 20, reducing the energy loss, and improving the cycle efficiency of the thermodynamic system. That is, in the present application, the third low pressure heater 60 extracts the gas in the turbine 10 and heats the water using the gas in the turbine.

The third extraction pipe hole 13 penetrates through the side wall of the steam turbine 10 and is used for extracting high-temperature steam in the steam turbine 10, the third extraction pipe hole 13 is arranged on the steam turbine 10, and the third low-pressure heater 60 is connected with the third extraction pipe 61 through the third extraction pipe 61.

Two ends of the second pipeline 611 are respectively communicated with the third extraction pipe 61 and the pipeline at the front end of the steam turbine 10, and are used for guiding the gas at the front end of the steam turbine 10 into the third extraction pipe.

Specifically, since the steam turbine 10 may leak gas during a long period of use, the gas sealed in front of the turbine needs to be introduced into the third bleed air in advance, and the introduced gas may be introduced into the third low-pressure heater 60 or the steam turbine 10.

According to some embodiments of the present application, referring to fig. 4 and 5, further comprising: a deaerator 70 and a fourth gas extraction pipe 71;

the deaerator 70 is communicated with a fourth air exhaust pipe hole 14 on the steam turbine 10 through a fourth air exhaust pipe 71; the fourth extraction duct hole 14 is disposed on a side of the first extraction duct hole near the front end of the steam turbine 10.

The deaerator 70 is used for removing oxygen and other gases in the boiler feed water, and ensures the quality of the feed water. Meanwhile, the deaerator 70 is a mixed heater in a regenerative water heating system, and plays a role in heating the supplied water and increasing the temperature of the supplied water.

The deaerator 70 uses the steam which has performed partial work in the steam turbine 10, and the steam is pumped into the deaerator 70 to heat the water,

the fourth extraction pipe hole 14 penetrates through the side wall of the steam turbine 10 and is used for extracting high-temperature steam in the steam turbine 10, the fourth extraction pipe hole 14 is arranged on the steam turbine 10, and the fourth low-pressure heater is connected with the fourth extraction pipe 71 through the fourth extraction pipe 71.

According to some embodiments of the present application, referring to fig. 4 and 5, further comprising: a fifth exhaust pipe 81, a sixth exhaust pipe 91, a first high-pressure heater 80 and a second high-pressure heater 90;

the first high-pressure heater 80 is communicated with a fifth exhaust pipe hole 15 on the steam turbine 10 through a fifth exhaust pipe 81, and the second high-pressure heater 90 is communicated with a sixth exhaust pipe hole 16 on the steam turbine 10 through a sixth exhaust pipe 91;

the fifth exhaust pipe hole 15 is disposed on one side of the first exhaust pipe hole close to the front end of the steam turbine 10, and the sixth exhaust pipe hole 16 is disposed on one side of the fifth exhaust pipe hole close to the front end of the steam turbine 10. Further comprising: a third pipeline 811; one end of the third pipeline 811 is communicated with the pipeline on the front end of the steam turbine 10, and the other end of the third pipeline 811 is communicated with the fifth extraction pipe 81.

Due to the fact that the steam turbine is abraded greatly and generates air leakage under the long-term operation, the air leakage condition occurs at the tail of the steam turbine 10, and negative pressure is formed at the tail of the steam turbine 10; thereby causing the hot gas in the first high pressure heater 80 to be drawn back into the steam turbine 10.

The first high pressure heater 80 is used for pumping the steam which does part of work in the steam turbine 10 into the first high pressure heater 80 to heat the water, so that the temperature of the water is increased, the amount of the steam discharged from the steam turbine 10 to the condenser 20 is reduced, the energy loss is reduced, and the circulation efficiency of a thermodynamic system is improved. That is, in the present application, the first high pressure heater 80 extracts gas in the steam turbine 10 and heats water using the gas in the steam turbine.

The fifth air extraction pipe hole 15 penetrates through the side wall of the steam turbine 10 and is used for extracting high-temperature steam in the steam turbine 10, the fifth air extraction pipe hole 15 is arranged on the steam turbine 10, and the first high-pressure heater 80 is connected with the fifth air extraction pipe 81 through the fifth air extraction pipe 81.

Both ends of the third pipeline 811 are respectively communicated with the fifth extraction pipe 81 and the front end pipeline of the steam turbine 10, and are used for introducing the gas at the front end of the steam turbine 10 into the fifth extraction pipe.

The second high pressure heater 90 is used for pumping the steam which does partial work in the steam turbine 10 into the second high pressure heater 90 to heat the water, increasing the temperature of the water, reducing the amount of the steam discharged from the steam turbine 10 to the condenser 20, reducing the energy loss and improving the cycle efficiency of the thermodynamic system. That is, in the present application, the second high pressure heater 90 extracts the gas in the turbine 10 and heats the water using the gas in the turbine.

The sixth extraction pipe hole 16 penetrates through the side wall of the steam turbine 10 and is used for extracting high-temperature steam in the steam turbine 10, the sixth extraction pipe hole 16 is arranged on the steam turbine 10, and the second high-pressure heater 90 is connected with the sixth extraction pipe 91 through the sixth extraction pipe 91.

Finally, it should be noted that the first, second, third, fourth, fifth and sixth extraction air duct openings 11, 12, 13, 14, 15, 16 are arranged in an array from right to left along the direction of the steam turbine 10.

And check valves are arranged on the first air exhaust pipe 41, the second air exhaust pipe 51, the third air exhaust pipe 61, the fourth air exhaust pipe 71, the fifth air exhaust pipe 81, the sixth air exhaust pipe 91 and the L-shaped pipeline 411. And then, when the low load is used, a high-pressure cleaning machine is used for cleaning the inner tube wall of the unilateral condenser 20 copper tube, the problem of scaling and blocking of the copper tube is eliminated, the condenser 20 copper tube is guaranteed not to be scaled and blocked, the heat exchange rate is increased, and the vacuum degree is effectively improved.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (8)

1. An apparatus for enhancing turbine vacuum, comprising: the system comprises a steam turbine, a condenser, a first low-pressure heater, an L-shaped pipeline and a first pipeline;

the tail end of the steam turbine is connected with the condenser through a pipeline, and the condenser is used for condensing steam into water;

the first low-pressure heater is communicated with a first exhaust pipe hole in the steam turbine through a first exhaust pipe, one end of the first pipeline is communicated with a pipeline on the front end of the steam turbine, and the other end of the first pipeline is communicated with the first exhaust pipe;

one end of the L-shaped pipeline is communicated with the first exhaust pipe.

2. The apparatus according to claim 1, wherein the other end of the L-shaped conduit is in communication with the first conduit.

3. The apparatus for augmenting the vacuum in a steam turbine according to claim 1, further comprising: a pressure equalizing box;

the pressure equalizing box is communicated with the front end of the steam turbine, and the pressure equalizing box is communicated with the rear end of the steam turbine.

4. The apparatus for augmenting the vacuum in a steam turbine according to claim 1, further comprising: the second air exhaust pipe, the third air exhaust pipe, the second low-pressure heater and the third low-pressure heater are arranged on the air exhaust pipe;

the second low-pressure heater is communicated with a second air exhaust pipe hole in the steam turbine through a second air exhaust pipe, and the third low-pressure heater is communicated with a third air exhaust pipe hole in the steam turbine through a third air exhaust pipe;

the second exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the first exhaust pipe hole, and the third exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the second exhaust pipe hole.

5. The apparatus for augmenting the vacuum in a steam turbine according to claim 4, further comprising: a second pipeline; one end of the second pipeline is communicated with the pipeline on the front end of the steam turbine, and the other end of the second pipeline is communicated with the third exhaust pipe.

6. The apparatus for augmenting the vacuum in a steam turbine according to claim 1, further comprising: a deaerator and a fourth exhaust pipe;

the deaerator is communicated with a fourth exhaust pipe hole in the steam turbine through a fourth exhaust pipe; and the fourth exhaust pipe hole is arranged on one side of the first exhaust pipe hole close to the front end of the steam turbine.

7. The apparatus for augmenting the vacuum in a steam turbine according to claim 1, further comprising: the fifth exhaust pipe, the sixth exhaust pipe, the first high-pressure heater and the second high-pressure heater are arranged on the first high-pressure heater;

the first high-pressure heater is communicated with a fifth exhaust pipe hole on the steam turbine through a fifth exhaust pipe, and the second high-pressure heater is communicated with a sixth exhaust pipe hole on the steam turbine through a sixth exhaust pipe;

the fifth exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the first exhaust pipe hole, and the sixth exhaust pipe hole is arranged on one side, close to the front end of the steam turbine, of the fifth exhaust pipe hole.

8. The apparatus for augmenting the vacuum in a steam turbine according to claim 7, further comprising: a third pipeline; one end of the third pipeline is communicated with the pipeline on the front end of the steam turbine, and the other end of the third pipeline is communicated with the fifth exhaust pipe.

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