CN207795323U - A kind of exhaust steam in steam turbine deriving structure - Google Patents

Abstract

A kind of exhaust steam in steam turbine deriving structure, including condenser, steam exhaust draw special parts, condenser throat reinforcement structure, steam exhaust extraction pipeline and its internal duct reinforcement structure, steam exhaust header；Steam exhaust is drawn special parts and is fixedly installed on condenser throat side, steam exhaust draws trepanning on throat's side plate that special parts are surrounded and forms steam exhaust outlet, condenser throat reinforcement structure is set on the inside of the condenser throat side of trepanning, steam exhaust draws special parts and draws piping connection steam exhaust header by steam exhaust, and steam exhaust header is connected to gas utilization unit；It solves exhaust steam in steam turbine extraction for the Reconstruction in field for the unit that put into operation, is conducive to Steam Turbine exhaust steam residual heat and utilizes, be conducive to the popularization of cold end energy-conserving and emission-cutting technology.

Description

A kind of exhaust steam in steam turbine deriving structure

Technical field

The utility model belongs to power plant for energy conservation field, and in particular to a kind of exhaust steam in steam turbine deriving structure.

Background technology

It is well known that Rankine cycle cold end thermal loss accounts for about more than the 50% of entire Steam Power Equipment heat loss, largely Waste heat is all dissipated by cold end into air.The significant wastage for not only causing energy, also increases coal consumption, increases pollution.We The characteristics of Rankine cycle itself can not be changed, can still be recycled by corresponding technological means more than exhaust steam in steam turbine completely Heat reduces thermal power plant cold end loss, to achieve the effect that energy-saving and emission-reduction.

Implement recycling exhaust steam in steam turbine waste heat it may first have to extract steam exhaust.Steam exhaust extraction is that steam exhaust recycles Premise and prerequisite.For indirect air cooling and water cooling Steam Turbine, due between condenser structure, steam turbine and condenser The many reasons such as connection and equipment arrangement, it is always a technical bottleneck that exhaust steam in steam turbine, which is drawn, especially for the machine of having put into operation The Reconstruction in field of group.Steam exhaust extraction lacks corresponding solution, greatlys restrict the utilization of Steam Turbine exhaust steam residual heat, restricts Cold end energy-conserving and emission-cutting technology is promoted.

Utility model content

The purpose of this utility model is to provide a kind of exhaust steam in steam turbine deriving structure and methods.

To achieve the goals above, the technical solution of the utility model is：

A kind of exhaust steam in steam turbine deriving structure, including condenser, steam exhaust draw special parts, condenser throat reinforcement structure, Pipeline and its internal duct reinforcement structure, steam exhaust header are drawn in steam exhaust；It is characterized in that：Steam exhaust is drawn special parts and is fixedly installed in On condenser throat side, steam exhaust draws trepanning on throat's side plate that special parts are surrounded and forms steam exhaust outlet, and trepanning is coagulated Condenser throat reinforcement structure is set on the inside of Qi Qi throats side, and steam exhaust draws special parts and draws piping connection steam exhaust by steam exhaust Header, steam exhaust header are connected to gas utilization unit.

Further, steam exhaust is drawn special parts and is fixed on a side, has single-pass configuration or multi-channel structure；Or Person, multiple steam exhaust are drawn special parts and are fixed on multiple sides, respectively have corresponding autonomous channel.

Further, the angle that steam exhaust is drawn between special parts mounting axis and condenser vertical center line is vertical.

Further, steam exhaust fairlead takes plug-in type welding, non-insertion welding or uses flange connection.

Further, steam exhaust outlet cross sectional shape is preferably rectangular.

Further, on the inside of condenser throat side setting reinforcement structure include condenser throat sub-truss reinforcer, Condenser throat equipment support reinforcement.

Further, on the inside of condenser throat lateral opening hole position, mounting guiding board structure.

Further, the internal support reinforcement of setting in steam exhaust fairlead；Spray desuperheating device is set in steam exhaust fairlead； Steam exhaust fairlead also sets up denoising structure.

By above-mentioned steam exhaust deriving structure, solves exhaust steam in steam turbine extraction for the Reconstruction in field for the unit that put into operation, profit It is utilized in Steam Turbine exhaust steam residual heat, is conducive to the popularization of cold end energy-conserving and emission-cutting technology.

Description of the drawings

Fig. 1 is steam exhaust deriving structure schematic diagram；

Fig. 2 is condenser throat deriving structure schematic diagram；

Special parts, 3 expansion joints are drawn in wherein 1 condenser, 2 steam exhaust, and pipeline, 5 steam main pipes are drawn in 4 steam exhaust

Specific implementation mode

The utility model is further described below in conjunction with the accompanying drawings, it should be understood that content described herein is only used for Description and interpretation the utility model is not used to limit the utility model.

As shown in Figure 1, a kind of exhaust steam in steam turbine deriving structure, including (Direct Air-Cooled formula or water-cooled) condenser, steam exhaust Draw special parts, pipeline and its reinforcement structure are drawn in condenser throat reinforcement structure, deflector, steam exhaust, steam exhaust header is (or female Pipe) etc.；Steam exhaust is drawn special parts and is fixedly installed on condenser throat side, then draws the larynx that special parts are surrounded in steam exhaust Reinforcement structure is arranged in the condenser throat side inside of trepanning on portion's side plate, trepanning, and steam exhaust is drawn special parts and drawn by steam exhaust Piping connection steam exhaust header；Have been placed on equipment (such as low-pressure heater, temperature-decreased pressure reducer, the small turbine row of condenser throat Vapour interface etc.) it can not move；The low-pressure heater for having been placed on condenser throat can also be removed progress again from throat Arrangement.

It is fixedly installed on condenser throat side as shown in Fig. 2, special parts are drawn in steam exhaust.Special parts installation is drawn in steam exhaust Position, may be selected condenser throat four sides (include with condenser shell axially parallel two sides AB and with it is solidifying Two axially vertical sides CD of vapour device shell) on.

Steam exhaust is drawn special parts and is fixed on a side, can have single channel corresponding with a trepanning, using list Channel design；Or it is corresponding with multiple trepannings with corresponding multiple channels, using multi-channel structure, reduces and destroy condenser Former truss.Specific number of channels is depending on the comfort level that condenser site layout project is constructed.For multi-channel structure, steam exhaust is drawn Between special parts channel, either connection, can also be disconnected.Further, special parts are drawn using multiple steam exhaust Also it is securable on multiple sides, corresponding multiple interchannels also realize connection each other.

The angle between special parts mounting axis and condenser vertical center line is drawn in steam exhaust, preferably vertical, also may be used To be to choose any angle according to live pipeline deployment scenarios.

Pipeline is drawn in steam exhaust to take plug-in type to weld, and can also take non-insertion welding connecting mode, or use method Blue connection type.

Steam exhaust outlet cross sectional shape is arbitrary shape.Preferably rectangular (square, rectangle) is suitable for reducing and destroys condensing Device original truss square structure, can also be circle, arc, ellipse, semicircle, trapezoidal or irregular shape.

On the tablet of condenser throat side after trepanning, it can cause condenser throat sub-truss that can not take root, to Influence condenser throat rigidity and intensity.After trepanning, new reinforcement structure is set on the inside of the condenser throat side of trepanning, Including：Condenser throat sub-truss reinforcer, takes root a little for providing sub-truss；The support of condenser throat equipment adds Strong part, the condenser throat equipment for being installed for throat provide support.The osseotomy site on the inside of condenser throat side, may be used also Mounting guiding board structure, for guiding steam exhaust outflow.

Steam exhaust draws and is equipped with expansion joint between special parts and steam exhaust extraction pipeline.Pipeline is drawn in steam exhaust can connect spike condensing Device can also connect steam jet ejector, steam exhaust can be sent to finger by pipeline according to Steam Turbine steam exhaust utilizing works needs Determine the designated position of technique.

What Bottomhole pressure was drawn in steam exhaust is negative pressure steam exhaust, and outside is atmospheric pressure, and external pressure is more than internal pressure, is wanted in steam exhaust fairlead The internal support reinforcement of setting, will have, or preferably in some direction in tri- directions XYZ, to increase steam exhaust fairlead Rigidity prevents from being flattened by ambient pressure, it is ensured that and it is safe and reliable, ensure that steam exhaust flowing is unobstructed.

The required elbow of setting, bend, valve, concentric reducer, pipe fitting, expansion are arranged on steam exhaust fairlead according to pipeline Section, suspension and support.Spray desuperheating device is set in steam exhaust fairlead, to control the degree of superheat or temperature of flowing steam.Steam exhaust is drawn Necessary noise reduction measure will be arranged in outlet pipe installation, such as vibration insulation structure or vibration-proof structure.

The case where when for more condensers while drawing steam exhaust, can be that separate unit condenser steam exhaust fairlead single tube is direct It is sent to gas utilization unit, can also be to be sent to use again after more condenser steam exhaust fairleads come together in steam main pipe (or steam exhaust header) Vapour equipment.

Specific operating method and steps are as follows：

First, structural parameters are calculated first, and according to the parameter (temperature, pressure, flow, flow velocity) for drawing steam exhaust, determination is drawn Take over road sectional area.Or steam exhaust parameter is calculated, according to the parameter (temperature, pressure, flow velocity) for drawing steam exhaust and may implement Draw take over road maximum secting area, calculates the flow for drawing steam exhaust.Wherein the sectional area of trepanning will meet country's mark of steam flow rate Alignment request.

Second, it determines steam exhaust extraction location, according to Specific construction field condition, is selected in four sides of condenser throat (with condenser shell axially two parallel sides (mark AB) or the two side (marks axially vertical with condenser shell One or more of)) CD opening operation is carried out.

Third designs and produces steam exhaust and draws special parts (or shaped piece), and it is that steam exhaust is drawn that special parts component is drawn in steam exhaust Key structure.Since condenser throat is provided with many pipelines, the structure of special parts is more complicated, need to meet the set pipe of throat The performance requirements such as Joining Technology, intensity, rigidity and the expansion rate in road.Steam exhaust outlet cross sectional shape is arbitrary shape.Preferably Rectangular (square, rectangle), can also be circle, arc, ellipse, semicircle, trapezoidal or irregular shape.

4th, it designs and produces steam exhaust and draws pipeline and its internal support.The structure size of special parts is drawn according to steam exhaust And installation site, it designs and determines steam exhaust fairlead pipeline configuration, internal support reinforcement is designed in steam exhaust fairlead.

5th, remove site operation barrier.

6th, slice off all (or part) throats side plates, carry out throat's sub-truss take root reinforcement, carry out throat's equipment branch Support is reinforced；When specifically drawing steam exhaust from ABCD some or several sides, on the tablet of side after trepanning, condenser can be caused Throat's support sub-truss can not take root, to influence condenser throat rigidity and intensity.After trepanning, new support purlin is established Frame is taken root a little.

7th, throat, which takes over original side, to be shifted；

When drawing steam exhaust from the sides AB, it is thus necessary to determine that the equipment of displacement takes over (such as thermometer, vacuum meter or other interfaces Deng)；

It, can be there are two alternative according to Specific construction condition when drawing steam exhaust from the sides CD.Scheme one is to be placed on larynx The low-pressure heater in portion is shifted out from throat redefines position installation, meanwhile, steam extraction heating pipe and heat regenerative system are condensed Waterpipe is attached.Scheme two, for throat low-pressure heater without movement.

From the sides CD draw steam exhaust when, it is thus necessary to determine that the equipment of displacement take over (such as water supply pipe, water curtain protection take over or its His interface etc.).Determine that the water supply pipe of displacement, water curtain protection are taken over and other equipment takes over the position drawn with steam exhaust between special parts It sets, mutually pass in and out relationship, above equipment is taken over when needing and increases expansion joint or suspension and support, to ensure its normal expansion and piping Stability.

8th, special parts, installation steam exhaust introduction pipe are drawn in installation steam exhaust.Steam exhaust is drawn to the specific bit for being connected to technique in succession It sets.Steam exhaust fairlead can both take plug-in type to weld, and can also take non-insertion welding connecting mode, can also use method Blue connection type.

8th, elbow, bend on steam exhaust fairlead needed for installation settings, valve, concentric reducer, pipe fitting, expansion joint, branch are hung Frame.Steam exhaust is drawn is arranged necessary expansion joint between special parts and steam exhaust introduction pipe；The necessary spray of setting in steam exhaust fairlead Water Desuperheating device, to control the degree of superheat or temperature of flowing steam.Necessary noise reduction measure is arranged in steam exhaust fairlead.

Finally it should be noted that：The foregoing is merely the explanations of the utility model, are not intended to limit the utility model, to the greatest extent The utility model is described in detail in pipe, for those skilled in the art, can still be remembered to aforementioned The technical solution of load is modified or equivalent replacement of some of the technical features.All spirit in the utility model Within principle, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (8)

1. a kind of exhaust steam in steam turbine deriving structure, including condenser, steam exhaust draw special parts, condenser throat reinforcement structure, weary Vapour draws pipeline and its internal duct reinforcement structure, steam exhaust header；It is characterized in that：Steam exhaust extraction special parts are fixedly installed in solidifying On Qi Qi throats side, steam exhaust draws trepanning on throat's side plate that special parts are surrounded and forms steam exhaust outlet, the condensing of trepanning Condenser throat reinforcement structure is set on the inside of device throat side, and steam exhaust draws special parts and draws piping connection steam exhaust connection by steam exhaust Case, steam exhaust header are connected to gas utilization unit.

2. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that steam exhaust draws special parts and is fixed on one On a side, there is single-pass configuration or multi-channel structure；It is fixed on multiple sides alternatively, special parts are drawn in multiple steam exhaust, Respectively there is corresponding autonomous channel.

3. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that special parts mounting axis is drawn in steam exhaust Angle between condenser vertical center line is vertical.

4. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that steam exhaust fairlead takes plug-in type to weld It connects, non-insertion welds or uses flange connection.

5. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that steam exhaust outlet cross sectional shape is side Shape.

6. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that setting on the inside of condenser throat side Reinforcement structure includes condenser throat sub-truss reinforcer, condenser throat equipment support reinforcement.

7. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that in condenser throat lateral opening hole portion Position inside, mounting guiding board structure.

8. exhaust steam in steam turbine deriving structure according to claim 1, which is characterized in that the internal branch of setting in steam exhaust fairlead Support reinforcer；Spray desuperheating device is set in steam exhaust fairlead；Steam exhaust fairlead also sets up denoising structure.