ES2376814A1 - Heat exchanger - Google Patents

Abstract

A heat exchanger having an arrangement of heat transfer surfaces and a pair of vertical steam/water separators structurally interconnected to one another to provide an integral support structure for the heat exchanger. The structural interconnection includes upper and lower structural members extending between the pair of vertical steam/water separators. The upper and lower structural members include headers, and an arrangement of heating surface which extends between and is fluidically connected to the headers. A structural support framework surrounds the heat exchanger for bottom support thereof, the framework providing structural support and rigidity for the heat exchanger and a means by which the heat exchanger can be picked up and lifted for placement at a desired location.

Description

HEAT EXCHANGER

FIELD AND BACKGROUND OF THE INVENTION

The present invention relates generally to the field of heat exchangers and more particularly to a heat exchanger having an integral support structure and a structural frame for its support.

In the present invention the principles of US Pat. Number 6,336,429 granted to Wiener and others, whose text is here incorporated by reference as if it were included here in its entirety.

To the extent that for the understanding of the present invention explanations of certain terminology or principles of the heat exchanger gear, the boiler and / or the steam generator may be necessary, the reader is referred to the work entitled Steam / its generation and use, 40th Edition, Stultz and Kitto, Editors; Copyright © 1992, The Babcock & Wilcox Company, and the work Steam / its generation and use, 41st Edition, Kitto and Stultz, Editors; Copyright © 2005, The Babcock & Wilcox Company, whose texts are here incorporated by reference as if they were included here in their entirety.

SUMMARY OF THE INVENTION

An aspect of the present invention is its application to a heat exchanger to transfer heat energy to a working fluid, such as water. The heat exchanger is used to transform at least a part of the water from the liquid phase to that of saturated or supersaturated steam.

The vertical water vapor / water separation devices, described in US Pat. No. 6,336,429 issued to Wiener and others mentioned above, are used to separate water vapor from the water-water vapor mixture. A pair of such vertical water / water vapor separators, structurally interconnected and arranged as described herein, provide an integral support structure for the heat exchanger.

The heat exchanger of the present invention advantageously comprises an arrangement of heat transfer surfaces and fluid conduit conduits arranged in a particular way to transfer a desired amount of heat energy to water. The heat transfer surfaces are advantageously made of tubes arranged inside panels, and are provided with inlet and outlet manifolds, as required. As is known to those skilled in the art, heat transfer surfaces that conduct water-water vapor mixtures are commonly referred to as evaporation or boiler surfaces; Heat transfer surfaces that conduct water vapor through it are commonly referred to as overheating (or overheating surfaces, depending on the associated water steam turbine configuration). Regardless of the type of heating surface, the sizes of the pipes, their material, their diameter, their wall thickness, their number and arrangement, are based on the temperature and pressure for the service, according to the design codes of applicable boilers, such as the Boiler and Pressure Vessel Code, Section 1, of the Americam Society of Mechanical Engineers (ASME), or with other equivalent codes as required by law. The characteristics required for heat transfer, pressure drop, circulation ratios, point absorption rates, mass flow rates of the working fluid inside the tubes, etc., are also important parameters that must be considered. Depending on the geographical location where the heat exchanger is to be installed, seismic loads and applicable design codes are also considered.

The heat exchanger is supported on its bottom in a base that is part of an interconnected rigid member arrangement that surrounds the heat exchanger and forms a structural support frame which, together with the integral support structure mentioned above, does not It only provides structural support and rigidity for the heat exchanger, but also means by which the heat exchanger can be picked up and raised for placement in a desired location. In the case of an application of the heat exchanger as a solar heat energy receiver, the structural support frame allows the entire heat exchanger assembly and the frame to be mounted on the ground and then raised and placed on a tower during the installation. The structural support frame remains with the heat exchanger, thereby facilitating (if necessary) the removal of the heat exchanger from the tower in case it is desirable to do so.

In accordance with the present invention, a heat exchanger is provided comprising an arrangement of heat transfer surfaces and a pair of vertical water / water vapor separators structurally interconnected with each other and providing an integral support structure for at least a part of the heat transfer surfaces of the heat exchanger. The structural interconnection includes upper and lower structural members formed of thick-walled pipe and extending between vertical water / water vapor separators. Each of the thick-walled pipes includes a pair of spaced interior partition walls, cross-arranged to form a central part therein defining a manifold. The integrally supported part of the heat transfer surfaces extends between, and is connected for fluid passage to, the collectors of the upper and lower structural members.

Each of the vertical water / water vapor separators includes four feet of coplanar pedestal located at the lower end of the water / water vapor separator, and arranged at evenly spaced intervals around the outer periphery of the water vapor separator. /Water.

The heat exchanger includes a structural support frame in the form of a rectangular parallelepiped that has an upper part, a lower part and longitudinally opposite sides that surround the heat exchanger for bottom support thereof.

The bottom of the structural support frame comprises four horizontally spaced parallel lateral and longitudinal beams that intersect each other to form a grid-like structure that includes a web of soul members arranged obliquely located between the longitudinal and lateral beams They are cut.

Two pairs of side braces cut to the two interiors of the four longitudinal beams of the bottom of the structural support frame, to form support bases for vertical water / water vapor separators. The feet of the pedestal of the water / water vapor separator are secured fixed to the respective support base.

Each of the opposite longitudinal sides of the structural support frame has two pairs of parallel spaced vertical beams located at opposite ends of the structural frame and a pair of parallel spaced longitudinal beams that cut to the vertical beams and located at the top end of each One of the opposite sides. Between each pair of vertical beams and the pair of longitudinal beams is located a network of obliquely arranged soul members.

The upper part of the structural support frame comprises two side beams that cut to the top of the pairs of parallel spaced beams that extend along each longitudinal side. The two side beams are located above the heat exchanger and provide a means by which the heat exchanger and the structural support frame can be elevated for placement in a desired location.

Another aspect of the present invention relates to the combination of a heat exchanger and the structural frame used to support it. The combination comprises an arrangement of heat transfer surfaces and a pair of vertical water / water vapor separators structurally interconnected with each other and providing an integral support structure for at least a portion of the heat transfer surfaces . The structural interconnection between the surfaces of the heat exchanger and the pair of vertical water / water vapor separators comprises upper and lower thick-walled pipes, each pipe having separations therein defining a central manifold. The integrally supported part of the heat transfer surfaces extends between, and is connected for fluid circulation to, the collectors of the upper and lower thick-walled pipes. Each of the water / water vapor separators includes a plurality of pedestal feet located at the lower end of the water / water separator.

The structural frame part of the combination has an upper part, a bottom, and longitudinally extending opposite sides that surround the heat exchanger to support the bottom thereof. The bottom of the structural frame comprises four lateral and longitudinal beams that extend horizontally spaced parallel that are cut with each other to form a grid-like structure and that includes a web of soul members arranged obliquely located between the longitudinal and lateral beams that they cut. Two pairs of parallel spaced side braces cut the two interiors of the four longitudinal beams at the bottom of the structural frame to form support bases for vertical water / water vapor separators, whose pedestal feet are secured fixed to their respective bases of support. Each of the opposite longitudinal sides of the structural frame has two pairs of parallel spaced vertical beams located at opposite ends of the structural frame and a pair of parallel spaced longitudinal beams that cut to the vertical beams and located at the top end of each of opposite sides. Between each pair of vertical beams and the pair of longitudinal beams is located a network of obliquely arranged soul members. The upper part of the structural frame is composed of two side beams that cut to the top of said pair of parallel beams. The two side beams are located above the heat exchanger and provide a means by which the heat exchanger and the structural frame can be elevated for placement in a desired location.

These and other features of the present invention will be better understood and its advantages will be more readily appreciated, in view of the description that follows, especially if read with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the heat exchanger that has been represented, for clarity, without the structural support frame of the present invention;

FIG. 2 is an exploded perspective view of the heat exchanger illustrated in FIG. one;

FIG. 3 is a perspective view of the pair of vertical water / water vapor separators, structurally interconnected with each other to provide an integral support structure in accordance with the present invention; Y

FIG. 4 is a perspective view of the integrally supported heat exchanger structure of FIG. 3, together with the structural frame used to support the heat exchanger structure according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Reference will be made here to the accompanying drawings, in which the numbers that are the same designate the same elements, or functionally similar elements, in all the various drawings.

With reference to FIGS. 1-3, a heat exchanger 10 according to the present invention has been represented therein. The heat exchanger 10 has left and right side walls 12, a roof part 14, and a pair of vertical water / water vapor separators 16, of the type described in the aforementioned US Pat. No. 6,336,429 granted to Wiener et al. Vertical water / water vapor separators 16 of this type are particularly suitable for handling large transient oscillations in the heat input to the heat exchanger 10, which can, in turn, cause large variations in the water levels within of the water / water vapor separators 16. The side walls 12 comprise tube panels having a membrane welded between the adjacent tubes. Pipe wall panels with welded membranes are well known to those skilled in the art and, therefore, will not be described herein in detail; For additional details, the reader is referred to the aforementioned Steam texts. The roof part 14 also comprises tube wall panels with welded membrane. Although membrane wall tubes are typically employed in conventional industry and in the walls of utility furnaces, to achieve a gas-tight construction, the arrangement of the membrane between adjacent tubes in this application also provides the structural rigidity of the panels and for that purpose it is for which the panels of the side walls 12 and the roof part 14 have a membrane wall construction.

If the heat exchanger 10 is used to provide only saturated steam, the side walls 12 and the roof part 14 comprise an evaporation or heating surface of the boiler. If the heat exchanger 10 is used to provide superheated steam, and as those skilled in the art will appreciate, some of the heating surface will have to be evaporation surface and other parts must be superheater surfaces. In the embodiment represented in FIG. 1, the side walls 12 are evaporation or boiler surfaces, and may be provided with inlet manifolds 18 and outlet manifolds 20. The water-water vapor mixture generated in the tubes forming the side walls 12 is collected in the outlet manifolds 20, which also serve as a mixing point to compensate for temperature imbalances that may exist in the water vapor mixture. The short tubes 22 in the outlet manifolds 20 are interconnected by means of riser tubes (not shown) with the short tubes 26 at the top of each of the vertical water / water vapor separators 16. The vertical separators of Water vapor / water 16 operates in the known manner (see US Patent No. 6,336,429 issued to Wiener et al.), separating the water vapor from the water-water vapor mixture. If the heat exchanger 10 is designed for the production of saturated steam, some water vapor outlet connections (not shown) from the two parts of each of the separators 16, lead the water vapor to its place waters below and for use. If the heat exchanger 10 is designed to produce superheated water vapor, the water vapor is conducted from the spacers 16 to the surfaces of the superheater for further heating and eventual collection and transport to its place downstream and for use. Depending on the initial temperature and pressure of the water vapor, and the desired outlet temperature of the superheated water vapor, the superheater may have to be designed as a multi-pass superheater, in order to provide adequate mass flow rates within surface tubes of the superheater, and such concepts are within the scope of the present invention. Two-step, four-step, or additional-step designs may be required, taking into account the temperatures not only of the superheater tubes, but also the temperature of the pipes of an adjacent structure, in order to address the problems of differential thermal expansion. In either case, the water separated from the water-water vapor mixture is conducted to a lower part of each of the separators 16, mixed with filler feed water, and conducted to the evaporation surface to start from The process again. In order to facilitate the circulation of water and the water-water vapor mixture throughout the heat exchanger 10, circulation pumps 28 may be advantageously arranged at the bottom of each of the separators 16 to pump the water, back to the evaporation surface, through supply ducts (not shown).

With reference to FIG. 2, an exploded perspective view of the heat exchanger illustrated in FIG. 1. This view best illustrates the relationship between the side walls 12 and the integral support structure, generally designated by the number 30, which comprises the pair of vertical water / water vapor separators 16, structurally interconnected with each other by means of upper and lower structural members 32.

With reference to FIG. 3, a PERSPECTIVE VIEW of the pair of vertical water / water vapor separators 16 structurally interconnected with one another according to the present invention, which provide the integral support structure 30 for the heat exchanger 10, has been shown. The upper and lower structural members 32 advantageously comprise thick-walled pipe, rather than a structural beam section in I or WF, for reasons that will be apparent. One end of each member 32 is connected to one of the vertical water / water vapor separators, such as by welding. The structural members 32 do not, in themselves, provide any direct interconnection for fluid circulation between the separators 16. The thick-walled pipe from which each of the structural members 32 is made, is provided with interior separation walls 34 which they form a central part comprising a manifold 36 that performs a function of collecting / transporting fluid. In addition to providing an integral support structure for the heat exchanger 10, the manifolds 36, which are part of the upper and lower structural members 32, are interconnected with one another by means of a heating surface arrangement 38 extending between, and it is connected for fluid circulation with, the upper and lower manifolds 36. Typically, the heating surface 38 is evaporating surface of upstream, which comprises tubes. The short tubes 40 provide connections for the riser tubes (not shown) that lead the water-water vapor mixture to the short tubes 26 in the spacers 16, as described hereinbefore.

It will be noted that the heating surface 38 extends between the manifolds 36 of the upper and lower structural members 32 while providing a gap or space 42 between the distal edges of the heating surface 38 and the outer wall of the spacers 16 steam / water. The side walls 12 extend into this space 42, with the distal ends of the heating surface 38 extending adjacent and in close proximity to the inner parts of the side walls 12. However, in order to accommodate differential thermal expansion, the heating surface 38 is not connected to the side walls 12 in any rigid way. The side walls 12 would be supported by the bottom on a base, in a manner similar to that described in the following with respect to the integral support structure

30. The side walls 12 may also be provided with tie-down beams, not shown, which are well known to those skilled in the art as elements for providing rigidity and support for the construction of a membrane tube wall.

With reference to FIG. 4, a perspective view of a part of the heat exchanger 10 according to the present invention, similar to that illustrated in FIG. 1, together with a structural frame 50 that supports the heat exchanger 10. For clarity, only the integral support structure 30 comprising the pair of vertical water / water vapor separators 16 structurally interconnected with each other has been shown. middle of upper and lower structural members 32.

The three-dimensional structural frame 50 is generally in the form of a rectangular parallelepiped, and is defined by the upper part 51, the bottom 52, and the longitudinal sides 55, and includes three sets of flanged beams extending in the three mutually orthogonal directions, eight longitudinal beams 58, six lateral beams 56, and eight vertical beams 54.

The bottom 52 of the structural frame 50 comprises four parallel spaced longitudinal beams 58 and four parallel spaced side beams 56, which are cut by connecting with each other to form a grid-like structure. A network of obliquely arranged core members 60 is located between the longitudinal and lateral beams 58 and 56 that are cut, to structurally reinforce the grid-like structure that forms the bottom 52 and to stiffen or stiffen the frame. structural

fifty.

The bottom 52 of the structural frame 50 includes a pair of support bases 53, each of which is formed by respective pairs of parallel spaced side braces 57 that cut connecting with them to the inner pair of longitudinal beams 58. Each of the steam separators Water / water 16 includes four 50 feet of pedestal located at or near the bottom of the water / water vapor separator. The pedestal feet 59 extend outwardly from the wall of the water / water vapor separator at a substantially right angle, and are coplanar and are arranged at evenly spaced intervals around the outer periphery of the water vapor separator 16 / Water. The feet 59 of the pedestal are each provided with a reinforcing bracket 61 and are secured fixed to the support base 53.

Each of the longitudinal sides 55 of the structural frame 50 comprises two pairs of parallel spaced vertical beams 54 located at opposite ends of the structural frame 50, and a pair of parallel spaced longitudinal beams 58 located at the upper end of the sides 55 and which cutting, connecting with them, to the vertical beams 54. A network of obliquely arranged core members 60 is located between each pair of vertical beams 54 and the longitudinal beams 58, to structurally reinforce the sides 55 and to give rigidity to the structural frame 50 .

The upper part 51 of the structural frame 50 comprises two side beams 56 that are cut and connected to the top of each of the pairs of longitudinal beams 58 located at the upper end of the longitudinal sides 55. In addition to reinforcing the upper part 51 and to give rigidity to the structural frame 50, the upper side beams 56 are generally located on the heat exchanger 10 and provide means by which the heat exchanger 10 and the structural support frame 50 can be picked up and raised, for placement in a desired place.

Although the present invention has been described above with reference to particular means, materials and embodiments, it should be understood that this invention can be modified in various ways without departing from the spirit or exceeding the scope thereof, and therefore it is not limited to those particulars described, but instead extends to all equivalents that are within the scope of the claims that are attached below.

Claims (30)

one.

A heat exchanger comprising an arrangement of heat transfer surfaces and a pair of vertical water / water vapor separators structurally interconnected with each other and providing an integral support structure for at least a portion of the transfer surfaces of heat exchanger heat.

2.

The heat exchanger according to claim 1, wherein the structural interconnection includes upper and lower structural members that extend between the vertical water / water vapor separators.

3.

The heat exchanger according to claim 2, wherein the upper and lower structural members are formed by thick-walled pipe.

Four.

The heat exchanger according to claim 3, which includes a pair of spaced apart partition walls arranged transversely within the thick wall pipe to form a central part therein.

5.

The heat exchanger according to claim 4, wherein the central part is a manifold.

6.

The heat exchanger according to claim 5, wherein said part of the heat transfer surfaces extends between, and is connected for fluid circulation to, the collectors of the upper and lower structural members.

7.

The heat exchanger according to claim 1, which includes a structural support frame having an upper part, a bottom and opposite longitudinal sides surrounding the heat exchanger for bottom support thereof.

8.

The heat exchanger according to claim 7, wherein the structural frame is in the form of a rectangular parallelepiped.

9.

The heat exchanger according to claim 7, wherein the bottom of the structural frame comprises lateral and longitudinal beams that extend horizontally.

10.

The heat exchanger according to claim 9, wherein the lateral and longitudinal beams are cut with each other to form a grid-like structure.

eleven.

The heat exchanger according to claim 10, which includes a network of obliquely arranged core members located between the longitudinal and lateral beams that are cut.

12.

The heat exchanger according to claim 9, wherein the bottom of the frame of the structure includes four parallel spaced longitudinal beams.

13.

The heat exchanger according to claim 12, which includes two pairs of parallel spaced side braces that cut to the two interiors of said four longitudinal beams to form support bases for the water / water vapor separators.

14.

The heat exchanger according to claim 13, wherein each of the vertical water / water vapor separators includes a plurality of pedestal feet located at the lower end of the separator and secured to a respective one of the support bases.

fifteen.

The heat exchanger according to claim 7, wherein each of the opposite longitudinal sides of the frame

Structurally it has two pairs of parallel spaced vertical beams located at opposite ends of the structural frame and a pair of parallel spaced longitudinal beams that cut to the vertical beams and located at the top end of each of the opposite sides.

16.

The heat exchanger according to claim 15, which includes a network of obliquely arranged core members located between each pair of vertical beams and the pair of longitudinal beams.

17.

The heat exchanger according to claim 7, wherein the upper part of the structural frame comprises two side beams that cut to the top of said pair of parallel spaced beams.

18.

The heat exchanger according to claim 17, wherein the two side beams are located above the heat exchanger and provide the means by which the heat exchanger and the structural frame can be elevated for placement in a desired location.

19.

In combination, a heat exchanger and the structural frame for the support thereof, the combination comprising an arrangement of heat transfer surfaces and a pair of vertical water / water vapor separators structurally interconnected with each other and providing a structure of integral support for at least a part of the heat transfer surfaces, the structural frame having an upper part, a bottom, and opposite longitudinal sides surrounding the heat exchanger for bottom support thereof.

twenty.

The combination according to claim 19, wherein the structural interconnection comprises thick-walled pipes

upper and lower, each pipe having separations in it that define a central manifold.

twenty-one.

The combination according to claim 20, wherein said part of the heat transfer surfaces extends between, and is connected for fluid circulation to, the manifolds in the upper and lower pipes.

22

The combination according to claim 19, wherein the bottom of the structural frame comprises horizontal and lateral beams that extend horizontally that are cut with each other to form a grid-like structure.

2. 3.

The combination according to claim 22, which includes a web of soul members arranged obliquely located between the longitudinal and lateral beams that are cut.

24.

The combination according to claim 22, wherein the bottom of the structural frame includes four parallel spaced longitudinal beams.

25.

The combination according to claim 24, which includes two pairs of parallel spaced braces that cut to the two interiors of said four longitudinal beams to form support bases for water / water vapor separators.

26.

The combination according to claim 25, wherein each of the vertical water / water vapor separators includes a plurality of pedestal feet located at the lower end of the generator and secured to the respective support bases.

27.

The combination according to claim 19, wherein each of the opposite longitudinal sides of the structural frame has two pairs of parallel spaced vertical beams located at opposite ends of the frame

structural and a pair of parallel spaced longitudinal beams that cut to the vertical beams and located at the upper end of each of the opposite sides. The combination according to claim 27, which includes a network of obliquely arranged core members located between each pair of vertical beams and the pair of longitudinal beams. 29. The combination according to claim 19, wherein the The upper part of the structural frame comprises two side beams that cut to the top of said pair of parallel beams. 30. The combination according to claim 29, wherein Two two side beams are located above the heat exchanger and provide the means by which the heat exchanger and the structural frame can be elevated for placement in a desired location. SPANISH OFFICE OF THE PATENTS AND BRAND Application no .: 201090047 SPAIN Date of submission of the application: 14.01.2009 Priority Date: REPORT ON THE STATE OF THE TECHNIQUE 51 Int. Cl.: See Additional Sheet RELEVANT DOCUMENTS

Category

56 Documents cited Claims Affected

X

US 6273182 B1 (PAUTLER DONALD ROBERT et al.) 14.08.2001, the entire document. 1-3

Y

4-30

Y

US 2002189786 A1 (FISCHER DANIELA et al.) 19.12.2002, figure 1. 4-6

Y

US 4263893 A (PAVLAK ALEX et al.) 28.04.1981, the whole document. 7-30

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 06.03.2012

Examiner J. A. Celemín Ortiz-Villajos Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE Application number: 201090047 CLASSIFICATION OBJECT OF THE APPLICATION F28D1 / 053 (2006.01) F22B21 / 20 (2006.01) F22B37 / 20 (2006.01) F22B37 / 24 (2006.01) F28F9 / 00 (2006.01) Minimum documentation sought (classification system followed by classification symbols) F28D, F22B, F28F Electronic databases consulted during the search (name of the database and, if possible, search terms used) INVENTIONS, EPODOC State of the Art Report Page 2/4  WRITTEN OPINION Application number: 201090047 Date of Completion of Written Opinion: 06.03.2012 Statement

Novelty (Art. 6.1 LP 11/1986)

Claims Claims 1-30 IF NOT

Inventive activity (Art. 8.1 LP11 / 1986)

Claims Claims 1-30 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. State of the Art Report Page 3/4  WRITTEN OPINION Application number: 201090047 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

US 6273182 B1 (PAUTLER DONALD ROBERT et al.) 14.08.2001

D02

US 2002189786 A1 (FISCHER DANIELA et al.) 19.12.2002

D03

US 4263893 A (PAVLAK ALEX et al.) 04/28/1981

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement In the state of the art some documents have been found that cancel the inventive activity of the filed patent application. These documents are analyzed below. In D01 a heat exchanger is presented that has some of the technical characteristics of the invention presented, namely (references correspond to D01): arrangement of heat transfer surfaces (18), with manifolds (20) structurally interconnected one with other (12) superiorly and inferiorly. In D01 we cannot find the pair of separation walls or the structural frame referred to in the presented invention. However, these technical characteristics can be found in D02 and D03. In D02 a cooling device with transverse heat exchangers (20) is presented and in D03 a solar heat exchanger is presented within a structural frame (see figure 1). It is considered obvious to a person skilled in the art to incorporate in D01 a pair of transverse walls such as those of D02 and a structural frame such as that of D03, which would precisely achieve said technical characteristics claimed in the submitted application. The rest of the technical details referred to in the invention represent common elements in the state of the art and therefore lack inventive activity, such as, among others: the fact that in the presented invention there is talk of steam separators while in D01 talk about collectors; that the structural members are formed by thick-walled pipe; or the specific structural arrangement of the frame. For all of the foregoing, it is considered that all the technical characteristics of the invention presented are either found as such in the state of the art, or are deduced in an obvious way to a person skilled in the art based on said state of the technique, whereby the requested invention lacks inventive activity, according to article 8 of Patent Law 11/1986. State of the Art Report Page 4/4