SI20035A - Device for sopporting essentially horizontally extending pipes - Google Patents

Abstract

The invention relates to a device for supporting essentially horizontally extending pipes, especially ribbed pipes, which run parallel to one another such as the pipes of a waste heat boiler. The pipes, which are stacked on top of each other, have cylindrical sleeves (3) slid over them at set intervals and are supported via said sleeves on the corresponding sleeves of the pipes beneath. The bottom row sleeves (3) lie on support devices (6, 6') which are connected to a casing by suspension elements (7, 8). Said support devices (6, 6') and suspension elements (7, 8) are configured in such a way that they are at least partly cooled, and said cylindrical sleeves (3, 3') have an annular cross section. The device described exhibits the required resistance to higher temperatures since it is cooled, and also requires little labour to produce.

Description

AE Energietechnik GmbH

PREPARING TO SUPPORT HORIZONTALLY FLOW PIPES

The invention relates to a heat exchanger with substantially horizontal ribbed tubes (1, T) running parallel to one another, such as e.g. the boiler tubes utilizing the waste heat, each of which, through a second tube (1, T), loaded at one another intervals, comprises transverse cylindrical cylindrical sleeves (3, 3 ') and the pipes (1) are supported by the respective sleeves (3) via the sleeves (3). 3 ') of the lower tubes (T), the sleeves (3') of the lowest row of tubes (T) rest on the supporting devices (6, 6 '), which are connected to the housing via the suspension elements (7, 7', 7, 8) and the cylindrical sleeves (3, 3 ') comprise a circular cross-section.

From AT 395 754 B, a well known plate is known for supporting vertically horizontal tubes, preferably ribbed tubes, on the housing, especially for boilers utilizing waste heat or condensers, in which the tube holes are arranged according to the dividing scheme and opposite the outer tube diameter slightly larger cross-section.

The invention has the disadvantage that the manufacture of punching plates is expensive, the manufacturing tolerances are often so large that the remaining bridge between the holes is narrow, thus not providing the required rigidity of the punching plate at high temperatures, such as e.g. in a boiler that utilizes waste heat and there is a risk of deformation of the hole plate. Furthermore, the minimum hole spacing is pre-specified with a strength so that no larger pipe thickness can be realized.

U.S. Patent 4,245,694 discloses a device for supporting heat exchange tubes consisting of a plurality of cylindrical sleeves or similar elements through which heat exchange tubes extend, with the sleeves arranged in a frame. This preparation does not have the required strength at higher exhaust gas temperatures.

US 2 268 730 illustrates a device for supporting substantially horizontally extending tubes in which at least the support device and associated suspension elements are designed at least partially cooled, but the support device is not solely attached to the suspension elements.

US 4 368 695 discloses a heat exchanger with hole plates comprising a cooled load carrier.

The object of the present invention, therefore, is to develop support for tubes which, at higher temperatures, have the required strength and which can be manufactured at a lower manufacturing cost than AT 395 754 B.

The invention is characterized in that at least one support device is attached to two suspension elements and that both the support device and the suspension elements are designed to be cooled, the carrier device being designed as a flow reservoir, the first suspension element as a supply pipe and the second suspension element as the drainage pipe of this reservoir.

It is new to the present invention that, by at least partial cooling of the support device and the suspension elements, the cooled parts are incorporated into the circulation of the boiler utilizing the waste heat and cooled at higher temperatures of the waste gases, so that the thermal stability of the cooled parts is increased, thereby giving temperature stability of the preparation.

The design of the invention consists in the cooling of the load-bearing devices and / or cooled suspension elements combined with non-cooled supports or non-refrigerated suspension elements.

This has the advantage that the medium flows through the carrier devices. the higher temperature load hanger elements are thus cooled, and the temperature-less loading devices can be made simpler by being designed unchilled.

The centers of the sleeves of a single tube set may be displaced in each case with respect to the tube set below, within the circumference of the tube radius, thereby ensuring a particularly tight arrangement of the pipes.

The centers of the sleeves of one pipe string may further be arranged vertically above the sleeves of the pipe pipe below. This aligned arrangement of pipes results in a less dense package of pipes and thus slightly more space for the waste gas flowing between the pipes.

In the area of opposing contact points, the sleeves are welded to one another. This permanently determines the mutual position of the sleeves.

In the case of a ribbed tube, the designed tubes rest on at least two ribs on one sleeve so that the tube is firmly supported.

The invention is exemplified and schematically illustrated in FIG. 1 to 4. FIG. 1 cross-section along the longitudinal axis of the sleeves of two adjacent tubes along the cross-section AAssl. 2, FIG. 2 is a cross-section of a tube bundle in cross-section normal to the longitudinal axis of the sleeves or. tubes, Figs. 3 two tube bundles in cross section normal to the longitudinal axis of the sleeves respectively. tubes in the area of the combined suspension device, FIG. 4 two tube bundles in the area of the non-cooled suspension device in cross section normal to the longitudinal axis of the sleeves respectively. tubes and in side view.

In FIG. 1 show the ribbed tubes 1, T above each other, which, with the ribs 2, 2 ', rest on the inner surface over the pushed sleeves 3, 3'. The inner diameter of the sleeves 3, 3 'is, in comparison with the outer diameter of the ribs 2, 2', selected so that the ribbed pipes 1,1 'can be easily pushed in the sleeve 3, 3' and the ribbed pipes 1,1 'can be tilted in the longitudinal direction of the sleeves. 3, 3 '. Thus, the longitudinal axis 4, 4 'of the ribbed tube 1,1' lies below the longitudinal axis 5, 5 'of the sleeve 3, 3'. The length of the sleeves 3, 3 'is chosen such that at least two ribs 2, 2' are supported on the sleeve 3, 3 '.

In FIG. 2 shows a cross-sectional view of a tube bundle in the area of the sleeves 3, 3 '. They are shown in the sleeves 3, 3 'of the ribbed tube 1, T, with the rib 2, 2' also indicated in the area of cross section A-A. The tubes 1, 1 'are arranged in horizontal strings, with the centers of the sleeves 3, 3' of one tube string being offset each time by the radius of the tube string below. With this exception, each sleeve 3, with the exception of the edge of the tube bundle, is fitted to the sleeves on the two sleeves 3 'of the lower tube string, and therefore comprises one tap with a total of six other sleeves 3, 3'. The position of these touches is illustrated by the dashed lines at sleeve 3 positioned in the center of the tube bundle. Along these points, the sleeves 3, 3 'are welded together. The pipe spacing 1, 1 'is automatically given by the dimensions of the sleeves 3, 3'.

In FIG. 3, two tubular bundles are shown above each other, illustrated by sleeves 3. The lower tube bundle rests on a support device designed as a collector 6 through which the medium flows in the direction of the arrows provided. The reservoir 6 is attached to at least two suspension elements 7, 8, the first suspension element being designed as a feed pipe 7 and the second suspension element as a drain pipe 8. The arrows indicate the direction of flow of the medium flowing through. The upper tube bundle is mounted on a non-cooled carrier 6 'designed support device, the carrier 6' being supported by the suspension elements 7, 8. The waste gas to be cooled flows from below through the tube bundle, with the waste gas temperature upwards. due to cooling through the pipes. In this way, the supporting device of the upper tube bundle can be designed as a non-cooled support 6 '.

In FIG. 4, two tubular bundles are shown on the right side of each other, which are represented by the sleeves 3, with the support devices 6 'and the suspension elements 7', 7 designed in a non-cooling manner. As profile beams 6 ', the designed support devices are attached to the lateral elements 7', which are connected to the profile beams 6 'above the supporting beams by means of the tongues 7'. with a support grid 10. The profile support 6 ', the lateral elements 7' and the element 9 form a supporting frame, which holds together the tube bundle or. sleeves 3, 3 '.

On the left side of FIG. 4 is a side view of a tubular bundle in the area of the load-bearing devices or. hanging elements. The horizontal lines in the lateral elements 7 'indicate the position of the centers of the individual sets of bushings 3.

In the case of a boiler that utilizes waste heat, the several tube bundles shown in FIG. 3 oz. 4, arrange side by side and side by side. The tubular bundles adjacent to each other are separated from each other by the vertically arranged suspension elements 7, 7 ', 7, 8. The suspension elements 7, 8 are secured in the housing, e.g. by means of a support grid 10.

Claims (2)

Patent claim 1. A heat exchanger with substantially horizontal ribbed tubes (1, T) running parallel to one another, such as e.g. the boiler tubes utilizing the waste heat, each of which, through a second tube (1, T), loaded at one another intervals, comprises transverse cylindrical cylindrical sleeves (3, 3 ') and the pipes (1) are supported by the respective sleeves (3) via the sleeves (3). 3 ') of the lower tubes (T), the sleeves (3') of the lowest row of tubes (Γ) rest on the supporting devices (6, 6 '), which are connected to the housing via the suspension elements (7, 7', 7, 8) and the cylindrical sleeves (3, 3 ') comprise a circular cross-section, characterized in that at least one support device (6) is attached to two hanging elements (7, 8) and that both the support device (6) and the suspension are of the element (7, 8) designed to be cooled, in that the carrier is designed as a flow manifold (6), a first suspension element as a feed pipe (7) and a second suspension element as a discharge pipe (8) of this reservoir (6). Device according to claim 1, characterized in that at least one upper support device is designed as a non-cooled support (6 ') and is supported by cooled suspension elements (7, 8).