CN202470861U

CN202470861U - Steam turbine condenser throat part for optimizing exhaustion steam flow field

Info

Publication number: CN202470861U
Application number: CN2012200728918U
Authority: CN
Inventors: 关明; 张延峰; 万逵芳
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-29
Filing date: 2012-02-29
Publication date: 2012-10-03
Anticipated expiration: 2022-02-28

Abstract

The utility model relates to a steam turbine condenser throat part for optimizing exhaustion steam flow field, and the steam turbine condenser throat is provided with a quadrangular shell, wherein an upper opening of the quadrangular shell is a condenser throat part steam inlet, a lower opening of the quadrangular shell is a condenser throat part steam exhaustion port, a guide device is installed inside the condenser throat part, and the guide device is an arc guide plate. A streamline guide plate is arranged inside the steam turbine condenser throat part, the exhaustion steam entering the steam turbine condenser throat part becomes exhaustion steam flow with reasonable flow field after being guided by the guide plate, after the exhaustion steam flow with reasonable flow field enters the condenser, heat load of a cooling water pipe bundle of the condenser is uniform, the exhaustion steam resistance force inside the condenser is reduced, so that the heat exchanging area of the condenser is effectively utilized, the heat transferring efficiency is improved, the vacuum degree of the steam exhaustion port of the steam turbine is increased, the efficiency of the steam turbine is improved, the distribution of the steam flow field of the steam turbine is uniform to optimize, and the service life of the cooling water pipe bundle is not influenced.

Description

The turbine condenser throat that the steam discharge flow field is optimized

Technical field

The utility model relates to a kind of turbine condenser throat, the steam discharge guiding device of particularly a kind of turbine condenser throat.

Background technology

The water-cooled condensing turbine is the prime mover with the acting of high steam pushing turbine impeller.It can drive generator for electricity generation, is a kind of energy-saving equipment of steam cascade utilization.During the acting of high steam pushing turbine, the pressure differential between the pressure of high steam and the pressure of steam discharge is big more, and Efficiency of Steam Turbine is high more.The exhaust steam pressure that reduces steam turbine as much as possible is one of factor that improves turbine efficiency.In order to reduce steam turbine exhaust pressure, be connected with condenser at the turbine discharge mouth, condenser is the Important Auxiliary equipment of steam turbine.The effect of condenser is that turbine discharge is condensed into water, and produces certain vacuum at the turbine discharge mouth.The steam discharge of steam turbine exhaust casing take over and condenser between be connected with condenser throat; Condenser throat has the housing of truncated rectangular pyramids shape; The suitable for reading of truncated rectangular pyramids shape housing is the condenser throat air intake; The end opening of truncated rectangular pyramids shape housing is the condenser throat steam drain, and condenser is connected in the condenser throat steam drain.

Two groups of cooling water tube banks that are distributed in both sides are arranged in the condenser.During use; The steam discharge that steam turbine is discharged gets into condenser throat from the condenser throat air intake at high speed; Behind condenser throat people inner space; Get into condenser from the condenser throat steam drain, contact with the tube bank that is connected with cooling water and under the condensation, simultaneously in the certain vacuum of turbine discharge mouth generation at the higher steam discharge of condenser internal pressure.

In the prior art, low pressure (LP) cylinder adopts radially that the diffusion of the steam turbine of steam discharge does not partly have guiding device, causes the steam discharge Flow Field Distribution that gets into condenser extremely unreasonable; The steam discharge flow velocity of endwall region is much larger than the steam discharge flow velocity of interior region in the condenser periphery; At the steam discharge of interior region even can produce vortex, not only make the inhomogeneous steam discharge resistance that also increased of thermic load of condenser cooling water tube bank, be equivalent to reduce the effective heat exchange area of condenser; Make heat transfer efficiency low; Cause turbine discharge mouth vacuum to descend, cause Efficiency of Steam Turbine to reduce, the irrational distribution in turbine discharge flow field also can shorten the service life of cooling water tube bank.

Summary of the invention

The purpose of the utility model is in order to overcome above-mentioned deficiency, to propose to get into the rational condenser throat of steam discharge Flow Field Distribution of condenser.

The utility model is realized with following method.

There is the housing of truncated rectangular pyramids shape in the turbine condenser throat that the steam discharge flow field is optimized; The suitable for reading of truncated rectangular pyramids shape housing is the condenser throat air intake; The end opening of truncated rectangular pyramids shape housing is the condenser throat steam drain, and guiding device is installed in condenser throat, and guiding device is an arc deflector.

During use, the utility model is installed between the inlet of turbine discharge mouth and condenser.Discharge from the condenser throat steam drain of the utility model get into the water conservancy diversion of the deflector of steam discharge in the utility model of the utility model from the turbine discharge mouth after, get into condenser.

There is the streamlined deflector inside of the utility model; Become the rational steam discharge stream in flow field behind the water conservancy diversion of the deflector of steam discharge in the utility model of the inside of entering the utility model; The rational steam discharge in flow field makes the thermic load of condenser cooling water tube bank even after flowing into condenser, has reduced the steam discharge resistance in the condenser, makes the heat exchange area of condenser obtain effectively utilizing; Improved heat transfer efficiency; Increased the vacuum of turbine discharge mouth, Efficiency of Steam Turbine is improved, the distribution optimization in turbine discharge flow field rationally can not influence the service life of cooling water tube bank.

Below in conjunction with accompanying drawing, the utility model is done explanation further.

Description of drawings

Fig. 1 cuts open sketch map according to the master office of looking of the rational condenser throat of a kind of steam discharge Flow Field Distribution of the invention scheme proposition of the utility model;

Fig. 2 is the schematic side view of Fig. 1.

The specific embodiment

Among Fig. 1, Fig. 2; There is the housing 1 of truncated rectangular pyramids shape in the turbine condenser throat that the steam discharge flow field is optimized; The suitable for reading of truncated rectangular pyramids shape housing is condenser throat air intake 2; The end opening of truncated rectangular pyramids shape housing is a condenser throat steam drain 3, and guiding device 4 is installed in condenser throat, and guiding device is an arc deflector.

Claims

1. the turbine condenser throat that optimizes of a steam discharge flow field; The housing that truncated rectangular pyramids shape is arranged; The suitable for reading of truncated rectangular pyramids shape housing is the condenser throat air intake; The end opening of truncated rectangular pyramids shape housing is the condenser throat steam drain, it is characterized in that: guiding device is installed in condenser throat, and guiding device is an arc deflector.