EP2634384A2 - Power plant building assembly, in particular coal power plant building assembly - Google Patents

Abstract

The arrangement has a machine house (1) receiving power plant components that are selected from steam turbines, generators, feed water pumps, capacitors and high pressure pre-heaters. A boiler house (2) receives heating steam boilers and components, and a connection component (7) is provided between the machine and the boiler house for receiving high pressure pipe lines that are connected with plant components. The connection component is designed as concrete construction in reinforced concrete and formed in homogeneous in-situ concrete and heavy reinforced concrete prefabricated structures.

Description

The invention relates to a power plant building arrangement, in particular a coal power plant building arrangement comprising a power house for receiving steam turbines, generators, feedwater pumps, condensers, high pressure preheater and the like power plant components, a boiler house for receiving heating, steam boilers and the like power plant components, and a Connecting structure between machine and boiler house for receiving high-pressure pipelines connecting the aforementioned power plant components

In the standard arrangement of recent years, the area of a power plant construction adjacent to the nacelle between the two stair towers is made of steel and supplied and assembled by the boiler supplier.

In this area, most of the connecting high-pressure (HD) pipelines (hot reheat -HZÜ, cold reheat -KZÜ and live steam) between the boiler and the steam turbine and the feedwater line from the high-pressure preheaters to the boiler are located. The pipelines are routed from the collectors on the steam generator through the Kesselhausstahlbau via the engine house intermediate construction to the respective connecting pieces on the steam turbine or to the connections of the high-pressure preheaters in the machine house. In current power plant projects with a single-block circuit comprising a steam generator and a turbine, the HD piping from the boiler to a turbine in this "intermediate area", which represents the above-mentioned connection structure. In a duo boiler system with two boilers on a turbine results in an even more complex interconnection of the HD pipelines.

Due to the extreme design parameters (operating pressure, temperature) for the HD pipes and the pipe cross-sections and materials required as a result, the pipe supports introduce enormous static and dynamic forces into the respective structures. On the machine house side, the loads are usually introduced via anchor plates into the concrete structure. In the boiler house, the mounting loads must be removed via secondary or support steel construction into the boiler house steel construction.

As a rule, the previous loose boundary between the machine house / intermediate building and the boiler house is the reinforced concrete wall of the intermediate building facing the boiler house. With completion of this wall, the date for "Put 1st boiler support" is given. This corresponds to the start of assembly for the steel construction of the boiler supplier. The prerequisite for this is the clearing of the base plate of the boiler house for the steel construction of the boiler supplier.

Since overlapping of the shell construction work on the nacelle intermediate building with the assembly activities in the Kesselhausstahlbau obstructions due to the security areas and working next to each other and above all on top of each other, this completion date is mandatory by Rohbaulos comply.

From the practical experience of the past one found out that the construction of the intermediate building due to the complexity and building mass for the construction companies represented a big challenge in the time, which in the Apron often not timely and comprehensively recognized and ultimately only with very large additional effort (acceleration measures), and associated costs for the builder, could be completed.

The relevant date "Completion of the bodyshell nacelle assembly = setting 1st boiler support" was thus often endangered.

The consequences, such. For example, delays in the construction of the boiler steel construction, lack of construction work and obstruction of the timely installation of pipelines can lead to significant project delays, disruptions of subsequent processes and extensive additional costs, compensation claims and supplements by suppliers.

The object of the invention is therefore to decouple the production of the intermediate structure of the boiler assembly as far as possible and to ensure safe construction freedom for the boiler assembly.

This object is achieved according to the characterizing part of claim 1 by an embodiment of the connecting structure as solid construction in reinforced concrete construction as a fundamental approach.

• Optimierung der Planungs-Schnittstellen zwischen dem Gesamtplaner, der Rohrleitungsplanung und dem Kessellieferanten, indem die Planung der Rohrleitungen mit den Lasteinleitungen in das Bauteil in einem großen Umfang vom Bereich des Kessels in den Bereich der Rohbauplanung und damit in die Hand des Gesamtplaners überführt wird. Damit werden die Schnittstellen zum Kessellieferanten minimiert.
• Entzug von Nachtragspotential auf Seiten des Kessellieferanten, da ein Großteil der Lasten aus der Halterung der HD-Rohrleitungen in die Betonstruktur des Verbindungsbauwerks eingebracht wird und die Konstruktion des Kesselstahlbaus nicht mehr beeinflusst. Bei der Optimierung der Rohrleitungsplanung und daraus folgenden Änderungen von Lastgrößen oder Halterungspunkten entfällt ein Eingriff in die Statik und Konstruktion des Kesselhausstahlbaus.
• Erhöhung der Freiräume für die HD-Rohrleitungsplanung hinsichtlich der Möglichkeiten zur flexiblen Lasteinleitung in den Betonkorpus durch die flexiblere Bauteilgestaltung in Stahlbetonbauweise.
• Die direkte Lasteinleitung (Rohrleitungslasten) erfolgt über Sekundärstahlbau, welcher an den Stützen und Unterzügen aufgelagert wird. Dadurch ergeben sich terminliche Vorteile für die Detaillierung der Lasteinleitung der HD-Rohrleitungen durch einen insgesamt längeren Bearbeitungszeitraum. Die Planung des Sekundärstahlbaus erfolgt parallel zur Rohrleitungsdetailplanung durch den Rohrleitungslieferanten.
• Minimierung der Schnittstellen zwischen Dampferzeuger und Rohrleitungslieferant auf die wenigen Schnittstellen an den Sammlern des Dampferzeugers.

As a result of these innovations, the following positive effects result, which in particular have an increased planning certainty and which make themselves noticeable for the project sequence as follows:

• Optimizing the planning interfaces between the overall planner, the piping designer and the boiler supplier, by planning the pipelines with the load injections into the component in a large scale Scope is transferred from the area of the boiler in the area of the shell construction planning and thus in the hands of the overall planner. This minimizes the interfaces to the boiler supplier.
• Withdrawal of additional supply potential on the part of the boiler supplier, since a large part of the loads from the support of the HD pipelines is introduced into the concrete structure of the connection structure and no longer influences the construction of the boiler steel construction. When optimizing pipeline planning and consequent changes in load sizes or support points, there is no need to interfere with the statics and design of boiler house steel construction.
• Increasing the free space for HD piping planning with regard to the possibilities for flexible load transfer into the concrete body through the more flexible component design in reinforced concrete construction.
• The direct load transfer (pipeline loads) takes place via secondary steel construction, which is supported on the columns and beams. This results in time advantages for the detailing of the load introduction of the HD pipelines through an overall longer processing period. The planning of the secondary steel construction takes place parallel to the pipeline detail planning by the pipeline supplier.
• Minimization of the interfaces between steam generator and pipeline supplier to the few interfaces to the collectors of the steam generator.

The advantages described are already noticeable in the case of an aforementioned single-block circuit of boiler and turbine, but the advantages of the invention become even clearer in a duo-boiler system.

In the dependent claims preferred developments of the invention are given. Thus, the connection structure is designed as a storey building with defined column distances and floor heights. Thus, the connection structure is a relatively regular structure, which can be assigned to the shell lot of the machine house preferably as Baulos.

The newly attributed to Rohbaulos building is compared to the later mentioned intermediate construction a relatively regular bullet structure (column distances, floor heights), which also represents the stiffening of the load-bearing wall of this intermediate structure - the so-called "axis F".

Thus, the increased requirements or effects on the erection of the intermediate wall from the irregularities of the intermediate structure of the axis F are decoupled.

According to a further preferred embodiment of the invention, the connecting structure is created in homogeneous Ortbetonbauweise. This is a proven and rational construction method.

Alternatively, the connection structure can be created in heavy duty reinforced concrete prefabricated construction.

Both methods of construction can advantageously be combined to accelerate building construction with a slipform construction to create the boundary wall, referred to as axis F, of the intermediate structure usually associated with the nacelle. With today's sophisticated Gleitbauschalungen it is possible to produce the wall in axis F (previously loose boundary of the shell to steel boiler) in Gleitschalungsbauweise. On average, this can be assumed that a climbing speed of about 2.5 m height per 24 hours. The length of the Gleitbauabschnittes only depends on the crane capacity. The temporally parallel tightening of the floors of the connection structure in cast-in-situ construction directly under or in the shadow of the upstream slip formwork is possible if a complete enclosure of Gleitschalungsbühnen and on an additional suspended stage the arrangement of brush scrapers for the protection of falling material are provided.

• Die Planung sämtlicher Einbauteile und Aussparungen der Fertigteile muss wesentlich früher als bei einer Ortbetonlösung abgeschlossen sein.
• Für die Montage der Fertigteile kommt ein Schwerlastkran zum Einsatz. Dieser muss auf die Bodenplatte des Kesselhauses fahren können, was terminlich möglich sein muss.

The following prerequisites for the use of prefabricated heavy-duty reinforced concrete are:

• The planning of all built-in parts and recesses of the finished parts must be completed much earlier than with an in-situ concrete solution.
• A heavy-duty crane is used for the assembly of the finished parts. This must be able to drive on the bottom plate of the boiler house, which must be possible in time.

The production of the floor slabs in the intermediate construction in Filigrandeckenbauweise with prefabricated Deckenriegeln can bring advantages in terms of time. The same applies to the construction of the connecting structure.

The boundary wall can preferably be created in two construction sections, each with two sliding sections. This leads to a reasonable timing of the construction process.

• Los Rohbau:
  • Die zusätzliche Leistung des Verbindungsbauwerks ist in den bisher gegebenen Eckterminen auszuführen. Dies wird ermöglicht durch die Wahl der Gleitbauweise für die Errichtung der Zwischenwand in Achse F des Maschinenhauses. Durch die Umstellung des statischen Systems zur Aussteifung der Wand in Achse F auf den gleichmäßigen Geschossbau des Verbindungsbauwerks - anstelle des unregelmäßigen und komplexen Zwischenbaus - wird der Vorlauf der Gleitbauweise abgesichert. Somit ist die Fertigstellung des Maschinenhaus-Zwischenbaus nicht mehr terminkritisch für das Setzen der 1. Kesselstütze. Der Abschluss der Arbeiten an der Zwischenbauwand und dem Bauteil des Verbindungsbauwerks kann ca. vier Monate vor dem planmäßigen Abschluss der Arbeiten am Zwischenbau realisiert werden. Das Risiko von erforderlichen Beschleunigungsmaßnamen wird entscheiden verringert.
• Los Rohrleitungsbau:
  • Neben den bereits genannten Vorteilen für die Rohrleitungsplanung kann mit Fertigstellung des Verbindungsbauwerks im Rohbau der Rohrleitungsbau sofort mit der Montage beginnen, ohne vom Kesselbau abhängig zu sein bzw. ihn zu stören. Eventuelle gegenseitige Montagebehinderungen werden somit weitestgehend ausgeschlossen. Notwendige Sicherheitsventile zur Absicherung von Leitungssystemen können an den Brandschutzabschnitten der Bekohlung im Zwischenbau vorbei über das Dach des Verbindungsbauwerks geführt werden. Es ist somit diesbezüglich keine Abstimmung mit dem Kesselstahlbau mehr notwendig. Eine Startterminvorverlegung gegenüber dem bisherigen Rahmenterminplan ist möglich.
• Los Kessel:
  • Eine Entflechtung der Planung und Errichtung des Kesselhausstahlbaus vom Rohrleitungsbau, sowie die Minimierung des Risikos bei der Sicherstellung des Termins "Setzen 1. Kesselstütze" (Termin-Puffer von ca. 4 Monaten) finden statt. Die Hochdruck-Dampfleitungen werden nur auf einer stark verkürzten Trasse durch und auch nur im oberen Bereich des eigentlichen Kesselhaus-Stahlbaus geführt.
• Sonstiger Projektablauf:
  • Die Wand in Achse F kann nach Fertigstellung durch das Rohbaulos unabhängig von eventuell erforderlichen Montagefreigaben durch den Kessellieferanten direkt nachfolgend geschlossen werden. Somit kann das Maschinenhaus früher wetterfest gemacht werden und die Komponenten- und
  • Anlagenmontagen im Maschinenhaus können unabhängig von den äußeren Witterungseinflüssen erfolgen. Die Erschließung der Ebenen des Maschinenhaus/Zwischenbaus über die beiden Haupttreppentürme kann unabhängig vom Fortschritt des Kesselhaus-Stahlbaus erfolgen und steht direkt nach Fertigstellung der Rohbauarbeiten am Verbindungsbauwerk zur Verfügung.

The advantages of the invention are again summarized as follows:

• Lot shell:
  • The additional power of the connection structure is to be executed in the basic dates given so far. This is made possible by the choice of the sliding construction for the construction of the intermediate wall in axis F of the machine house. By converting the static system for stiffening the wall in axis F on the uniform floor construction of the connecting structure - instead of the irregular and complex intermediate structure - the flow of the sliding construction is hedged. Thus, the completion of the nacelle intermediate building is no longer deadline for setting the 1st boiler support. The completion of the work on the intermediate wall and the component of the connecting structure can be completed about four months before the scheduled completion of work on the intermediate structure. The risk of required acceleration measures is decidedly reduced.
• Lot pipeline construction:
  • In addition to the advantages already mentioned for pipeline planning, with the completion of the connection structure in the bodyshell, the pipeline construction can begin immediately with the installation without being dependent on the boiler construction or disturbing it. Any mutual assembly obstructions are thus largely excluded. Necessary safety valves for securing piping systems can be routed past the fire protection sections of the coaling in the intermediate structure over the roof of the connecting structure. There is thus no vote in this regard with boiler steel construction more necessary. It is possible to bring the start date forward compared to the previous schedule schedule.
• Lot of cauldrons:
  • An unbundling of the planning and construction of the boiler house steel construction of the pipeline construction, as well as the minimization of the risk with the assurance of the appointment "setting 1. boiler support" (appointment buffer of approx. 4 months) take place. The high-pressure steam pipes are only routed through a very shortened route through and also only in the upper area of the actual boiler house steel construction.
• Other project sequence:
  • The wall in axis F can be closed by the boiler supplier immediately after completion by the Rohbaulos regardless of any required assembly approvals. Thus, the machine house can be made weatherproof earlier and the component and
  • Plant assembly in the machine house can be carried out independently of external weather conditions. The development of the levels of the nacelle / intermediate structure over the two main tower towers can take place independently of the progress of the boiler house steel construction and is available directly after completion of the shell construction work on the connection structure.

• Minimierung des Risikos bei der Terminsicherung "Setzen der 1. Kesselstütze"
• Optimierung/Minimierung der Planungs- und Lieferschnittstellen
• Minimierung des Anspruchspotentials auf Seite des Kessels
• Entkopplung der Errichtung von Maschinenhaus/Zwischenbau von der Kesselmontage
• Entkopplung der Rohrleitungsplanung von der Planung des KesselStahlbaus
• Durch die örtlich begrenzte Führung der Dampfleitungen im oberen Bereich des Kesselhauses kann die Abstimmung über die Lasteinleitungen in den Kesselhausstahlbau schneller und insgesamt zu einem späteren Zeitpunkt im Projektablauf erfolgen
• Weitgehende Entkopplung der Rohrleitungsmontage von der Kesselmontage und daher Möglichkeiten zur Optimierung der Rohrleitungs-Montage
• Die Montagetätigkeiten im eigentlichen Kesselhaus beschränken sich auf ein Minimum, dadurch ist die gegenseitige Beeinflussung durch Montagetätigkeiten von Rohrleitungsbauer und Kesselbauer deutlich verkürzt
• Die Anzahl der Bedienbühnenflächen im Kesselhaus wird deutlich verringert, da weniger Konstanthänger der HD- Rohrleitungen zugänglich gemacht werden müssen
• Wetterfestmachung des Maschinenhaus/Zwischenbaus unabhängig von der Kesselmontage
• Bauzeitverkürzung für die Zwischenbauwand unter Ausnutzung der konstruktiven Möglichkeiten des Verbindungsbauwerks in Ortbetonbauweise zur Aussteifung der Wand.

The measures described in the preceding remarks and their effects contain a number of potential savings for costs and risks:

• Minimizing the risk of securing the deadline "Setting the 1st boiler support"
• Optimization / minimization of planning and delivery interfaces
• Minimization of the claim potential on the side of the boiler
• Decoupling of the construction of machine house / intermediate building from boiler installation
• Decoupling of pipeline planning from the planning of boiler steel construction
• Due to the localized management of the steam pipes in the upper area of the boiler house, the vote on the load discharges in the boiler house steel construction can be made faster and overall at a later point in the project
• Extensive decoupling of pipe installation from boiler assembly and therefore possibilities for optimizing pipe installation
• The assembly work in the actual boiler house is limited to a minimum, thus the mutual influence is significantly reduced by assembly activities of piping and boiler maker
• The number of operating platform areas in the boiler house is significantly reduced because fewer constant hangers of the HD piping must be made accessible
• Weatherproofing of the machine house / intermediate building independent of the boiler installation
• Construction time reduction for the intermediate wall, taking advantage of the constructive possibilities of the connecting structure in cast-in-situ construction to stiffen the wall.

Fig. 1

einen schematischen ausschnittsweisen Lageplan eines Kraftwerksgebäudes,

Fig. 2

einem Vertikalschnitt durch das Kraftwerksgebäude gemäß Fig. 1, und

Fig. 3

eine schematische Ansicht der Zwischenwand (Achse F).

Further features, details and advantages of the invention will become apparent from the following description of an embodiment with reference to the accompanying drawings. Show it:

Fig. 1

a schematic fragmentary site plan of a power plant building,

Fig. 2

a vertical section through the power plant building according to Fig. 1 , and

Fig. 3

a schematic view of the intermediate wall (axis F).

As Fig. 1 and 2 show, the power plant building on a nacelle 1, which serves to accommodate power plant components such as steam turbines, generators, feedwater pumps, capacitors, Hochdruckvorwärmern and the like. The machine house 1 is created in conventional reinforced concrete construction.

The second main building of the power plant is the boiler house 2, which is usually made in steel construction technique. In it are other power plant components, such as boilers, steam boilers and the like. In the boiler house 2 two boiler lines 3, 4 are installed, which are connected via a variety of high-pressure lines 5 with the corresponding power plant components to the nacelle. The corresponding connections run via an intermediate structure 6, which adjoins the machine house 1, and a connecting structure 7, which is arranged between the two stair towers 8, 9 and connects to the boiler house 2. The approximately 100 m long structure of the connecting structure 7 is in each divided two sections 10.1, 10.2, 10.3, 10.4 of length and height, as out Fig. 3 becomes clear. These four sections define two construction sections and two sliding sections for the in Fig. 3 shown boundary wall 11 - the so-called axis F - between the intermediate structure 6 and the connecting structure. 7

The result is the following timing of the construction process for the construction of the axis F in sliding construction: 1st bar: duration process 2 KW Structure of the 1st slipforming set in axis F 2 KW Gliding the first 50 m long wall 10.1 at a height of approx. 40 m (from -7 m to approx. + 35 m in relation to the power station zero) and empty the formwork. The formwork stops. 20 KW Production of the floors of the connecting structure in this area to the lower edge of the lowest scaffolding platform of the slip formwork. This eliminates the need to work one above the other from slipform and storey construction. 2nd bar: duration process 2 KW Construction of the 2nd slipform set in axis F 2 KW Sliding the second approx. 50 m long wall 10.2 to a height of approx. 35 m (from -7 m to approx. + 32 m relative to the power station zero) and empty the formwork. The formwork stops. The height offset of the 2nd construction section for the 1st construction section results from the necessary distance of the respective formworks with associated stages from the two construction sections. 23 KW Production of the floors of the connecting structure in this area to the lower edge of the lowest scaffolding platform of the slip formwork. This eliminates the need to work one above the other from slipform and storey construction. 3rd bar: duration process 2 KW further sliding operation with the formwork from clock 1 from height approx. +35 m to wall crown to approx. +72 m with reference to the power station zero - Section 10.3. 2 KW Gleitschalungsabbau 23 KW Production of the floors of the connecting structure between approx. +35 m and roof ceiling 4 tact: duration process 2 KW further sliding operation with the formwork from clock 2 from height approx. +32 m to wall crown approx. 72 m with reference to the power station zero - Section 10.4. 2 KW Gleitschalungsabbau 20 KW Production of the floors of the connecting structure between approx. + 32 m and roof ceiling

Claims (7)

Power plant building arrangement, in particular coal power plant building arrangement, comprising a nacelle (1) for accommodating steam turbines, generators, feedwater pumps, condensers, high pressure preheaters and the like power plant components, - A boiler house (2) for receiving heating, steam boilers and the like power plant components, and - a connecting structure (7) between the machine and boiler house (1, 2) for receiving high-pressure pipelines connecting the aforementioned power plant components,
marked by - An embodiment of the connecting structure (7) as solid construction in reinforced concrete construction. Power plant building arrangement according to claim 1, characterized in that the connecting structure (7) is designed as a storey building with defined column distances and floor heights. Power plant building arrangement according to claim 1 or 2, characterized in that the connecting structure (7) is assigned as Baulos the shell lot of the machine house (1). Power plant building arrangement according to one of the preceding claims, characterized in that the connecting structure (7) is created in homogeneous Ortbetonbauweise. Power plant building arrangement according to one of claims 1 to 3, characterized in that the connecting structure (7) is created in heavy duty reinforced concrete prefabricated construction. Power plant building arrangement according to one of the preceding claims, characterized in that the machine house (1), in particular a to the machine house (1) belonging intermediate structure (6) facing boundary wall (11) of the connecting structure (7) is created in Gleitschalungsbauweise. Power plant building arrangement according to claim 6, characterized in that the boundary wall (11) is created in two construction sections, each with two sliding sections.

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