ES2276742T3 - ELEMENT OF ANNULAR DRYING, PROCEDURE AND USE OF THE SAME AND DRYING APPARATUS. - Google Patents

Abstract

Annular drying element (15) for mounting on a rotor axle in a drying apparatus, and where the drying element comprises at least two annular plate elements, a first (16') and a second plate element (16"), where at least the first plate element (16') is configured with a number of through-going openings (25) in the plate. The plate element with said openings (25) is lying opposite the non-broken through surface (51) of the adjacent plate element, and the plate elements are connected to one other by welding (52) along the edge (53) of the openings, and the non-broken through surface (51) lying in the bottom of an opening (25) is perced to provide through-going holes (54) through the annular plate element, extending from the one side to the other side of the drying element (15). There is hereby achieved an annular drying element, in that the substantially identical drying elements are assembled against each other by being welded together at the periphery and along the inner circumference, whereby a pressure-tight assembly is achieved. Moreover, welding is carried out along the whole periphery of the openings, so that this welding fastens partly agains the edge of the opening in the first plate and partly against the adjacent non-broken surface of the opposite plate element. There is hereby achieved a pressure-tight element, and where it is subsequently possible to carry out piercings corresponding to the earlier openings, insasmuch as here a piercing shall thus be carried out only through a single plate.

Description

Annular drying element, procedure and use thereof and drying apparatus.

The invention relates to an annular element of drying for mounting on a rotor shaft in a drying apparatus (dryer), and in which the drying element comprises at least two ring plate elements, a first and a second element board, where at least the first board item is set with a number of through openings formed in the plate.

The invention also relates to an apparatus of drying to heat or cool the impregnation, the material crushed of animal, vegetable or chemical origin, comprising a stationary housing and a rotating rotor, comprising a number of annular drying elements, each of which it comprises at least two annular plate elements with means to transport a means to heat or cool them and to conduct possible condensations and where at least one of The plate elements is configured with a number of openings interns extending from one side of the plate to The other side of the plate.

The invention also relates to a procedure and the use of the procedure and the annular element of dried

A drying element of the type is known revealed in the introduction, for example, from the document WO98 / 15791. A drying element of this type is provided with a larger heating area while achieving a agitation and favorable transport of the product being processed, where said product can be products that contain grease or oil, slaughterhouse wastes, materials biological of various characteristics such as fish meat, waste from breweries and other similar materials of animal, plant or chemical origin. Drying elements they constitute a form of heat exchanger and are used to indirectly heat or cool these products.

However, there is a risk with that element annular drying of the cavity, which is formed between the two plate elements, not be tight enough and that, therefore, don't be able to withstand the pressures that appear during the introduction of steam, etc.

In this way, the object of the present invention is to provide a drying element which is pressure tight, and in which this pressure impermeability it is ensured during current production, and in which it is achieved also the appropriate opening to guarantee a flow (flow) of the product on the machine on which the item could be placed annular drying

This is achieved through an annular element of drying of the type disclosed in the preamble of claim 1, in which the plate element with said openings is located so opposite the unperforated surface of the adjacent plate element, and in which the plate elements are connected to each other by a weld made at the edges of the openings, and in which the unperforated surface that is located at the bottom of an opening is perforated to provide through openings in the adjacent plate element, said through openings being demarcated by a festoon shaped out throughout the periphery of the through openings to provide the annular drying element a through hole extending from one side to the other side of the drying element, and in the that the plate elements are joined together at an outer edge, by welding.

In this way, with an annular drying element the idea is that two substantially identical plate elements are assembled together, welding each other on the periphery and in the inner circumference, which achieves a tight assembly to the pressure. Welds are also carried out throughout the peripheries of the openings, such that this welding hold partially against the edge of the opening of the first plate and partially against the non-perforated surface, attached, of the opposite plate element. By this means an element is provided pressure tight and in which the perforations are made,  subsequently, so that they correspond to the previous openings, considering that it will only be done here a perforation through a single plate.

By this means, an area of proper contact of one of the plate elements against the other, in the one that the top edge of this festoon out is located, of this way, against the unperforated area of the attached surface and in which the height of the festoon comes, in this way, to define, the space that must exist between the two plate elements.

Providing an annular drying element of according to the invention, a good joint agitation of the substance and the surface of the exchanger is increased hot.

Providing an annular drying element of according to the invention and as disclosed in claim 2 and 3, an appropriate and simplified production of the element is achieved annular drying and a very construction is also achieved resistant and rigid which can withstand high pressure and which makes it possible to use high temperature steam as a medium heating

The tube parts are configured, preferably, as disclosed and characterized in the claim 5, that is, with section profiles circular transverse, which among other things make it possible to use some standard production tubes which are trimmed in the desired lengths The tube pieces can have a length as disclosed in claim 6. When use is made of said length, this corresponds to the thickness of the element and, with which, the possibility of using scraper elements in the drying apparatus, which scratch the drying elements to clean them, which, for example, may be appropriate in that end where the product is the maximum impregnation or in the area in which the product is more viscous. However, it is possible also that the tube pieces have a diameter as revealed in the claim 7, thereby achieving the possibility that it is capable of varying the drying element in cases where require larger openings or smaller openings.

The invention also relates to an apparatus of dried, as disclosed in the preamble of claim 8, and also when the plate element with the openings is arranged with said openings located on the opposite side of the openings passages of the adjacent plate element, said openings being interns limited by a festoon that is provided by welding along the entire periphery of the through openings, for the provision of an annular element of drying with through holes that extend from one of the sides to the other side of the drying element and in which the plate elements are coupled together, in addition, on one edge outside by welding.

By means of said apparatus, the Advantages described above during the use of the annular element of drying in said drying apparatus.

Claims 9 to 12 disclose appropriate exemplary embodiments of the apparatus of dried

The invention also relates to a procedure as disclosed in claim 13.

The invention will now be described, more in detail, referring to the drawings, in which:

Figure 1 shows a first embodiment of the drying element according to the invention;

Figure 2 shows a section taken at along the line II-II shown in Figure 1;

Figure 3 shows the section shown in the Figure 2, where the perforations are made through the openings;

Figure 4 shows a plate element for the production of an annular drying element according to the invention;

Figure 5 shows an embodiment by way of example, where the tube pieces are located in the holes;

Figure 6 shows a second embodiment of a drying element according to the invention;

Figure 7A shows a section shown in the Figure 6, viewed in the VII-VII direction and shown at a larger scale;

Figure 7B shows that section shown in Figure 7A and with the pieces tubes mounted in the holes;

Figures 8A and 8B show a section axial cross-section taken through the drying apparatus according with the invention

Figure 1 shows an annular drying element 15 seen from the front, in which the plate element front, that is, the first plate element 16 'is shown. The plate elements are circular with an outer diameter and inside and where along the outer edge 18 are welded each other to form a tight seal and where along the inner edge, the so-called annular base part 17, are also soldiers with each other and surround an axis.

On the same ring plate part, a number of openings 25. Preferably, these openings 25 are cylindrical and as regards the first plate element 16 ', will be placed opposite the continuous surface 51 of a second plate element 16 '', that is, in the areas located between the openings 25 in the second plate element 16 ''.

The two plate elements 16 ', 16' 'are welded also along the periphery of the opening 25 in the provision of a weld 52 that extends along the entire edge 53 of the opening. The unperforated surface located in the bottom of said opening, is shown with the number of reference 51.

Figure 2 shows a section taken at along the line II-II shown in Figure 1 and, shows the first 16 'plate element welded against the second 16 '' plate element. The distance between the two elements is corresponds to the height of the festoon out 55, which limits the openings 25 provided in both plate elements. The Festoon geometry looks almost like a funnel, both in the section transversal as in the plan view. In this way, among the two plate elements 16 ', 16' 'an annular opening is formed 23 in which steam and the like are retained, under pressure.

As described above, the two plate elements are welded together welds 52 that extend along all the annular openings 25, such that the edge 53 of the festoon opening 55 is in contact with the surface unperforated 51 of the second plate element. Later will perform a perforation, the so-called through opening, corresponding to the center and located at the same distance from the  center of these welded areas, in the provision of a through hole 54, as will be seen in Figure 3. Therefore, the through hole 54 is essentially smaller than the opening 25.

Figure 4 shows a section taken through of a plate element before it comes into contact with a second plate element to form an annular drying element fifteen.

Figure 5 shows an example of a second embodiment according to the invention, with a section through of the annular drying element. The drying element consists of two annular discs or plate elements, flat, identical, made of A sheet of steel. The annular discs or plate elements have, by example, 2 mm. in diameter and a number of holes 25, per example, 42. The two plate elements are coupled together, it is that is, they are joined together by the outer edge 18 by means of an annular band of steel 19 and an annular weld 20. In the inner edge / base part, plate elements are provided with an annular base piece in each plate element. The Plate elements have a thickness of the order of 4 to 20 mm. In all the openings 25, a part is quickly inserted and welded tube 26 to both plate elements, such that the tube parts 26 constitute supports between the plate elements. At example shown, the supports are 102 mm tube pieces.

The tubular supports 26 are resistant and they are firmly welded to the two plate elements, in such a way that among these a camera 22 appears for a medium of heating, for example, steam, at a pressure of 10 bar, said chamber having an annular opening 23 for the supply of steam and for the discharge of exhaust steam and condensation in a commonly known way.

The base pieces 17, which are shown in the drawing they extend outward from each side of the element plate, are arranged to be welded directly to each other with adjacent elements and, by this means constitute an element tube which surrounds the rotor shaft in the drying apparatus. At For example, the axes of the tubular supports 26 are parallel to the axis 30 of the drying element, and the tubular supports have a length such that they are substantially corresponding to the thickness of the element. However, the tubular supports will be able to spread over the surface of the element, and they will also be able of being trimmed in a manner not parallel to the element plate and of forming an angle inclined to this end, possibly with another way so that the projected tubular supports they constitute blade elements, conveyor elements or agitators which influence the agitation of the material which is being dried in the apparatus.

Tubular supports and openings 25, attached, they are arranged in two concentric circles 28 with the outer edge 18 of the drying element and staggered together from such that a substantially uniform distribution is achieved of the through holes 54 and when the supports are provided tubular, a uniform distribution of the annular supports through the element, which achieves that the free area of the plate between the tubular supports is not Come back too big. This results in knowing the amount of vapor pressure that can be applied to the element without that a very large deflection of the plate material occurs that appears between the tubular supports.

Figures 6 and 7 show an example in which a drying element 15 of the same size is used, but in which use a larger number of smaller tubular supports, that is, 90 supports distributed over three concentric circles 28, where The tubular supports are 7.65 cm supports.

Figure 7A is a section taken along line VII A shown in Figure 6 and before it is done a hole, in the provision of the holes 54. Figure 7B shows the same section as in Figure 7A, after it has done the drilling and where the tube pieces have been inserted in the holes.

According to the invention, despite the type of material to be processed in a drying apparatus, is say, despite the consistency of the material, its degree of impregnation, grain size, etc., is thus possible dimension the drying elements in an optimal way selecting the size of the through holes and, in those cases where tubular supports are used, selecting the number of these supports and also their size, configuration and its positioning, such that the drying apparatus resulting have optimal energy consumption without any type of sacrifice in the quality of the device in relation to the time of service life and its operational reliability.

Figures 8A and 8B show a section axial cross-section taken through a drying apparatus according  with the invention The central axis 30 of the rotor is indicated and by above which you can see the central pipe 11 for the steam supply to heat and remove products from the condensation, which is done in a commonly known way. A number of annular drying elements 15 of the type described previously referring to Figures 1 to 7, they are constructed of plate elements and through its base pieces 17 are welded together in an annular manner around the central pipe 11. Steam can be supplied to heat the drying elements through stop connections 35.

The central pipe 11 is shown finished in one of the ends and provided with a shaft collar 37 which is located in a commonly known manner and sealed by the wall 32 of accommodation 2.

On the contrary, the drying apparatus is built in a commonly known way and therefore not It is described in detail.

As described above, each of The drying elements 15 comprise a number of openings axial direction passages and said openings may be provided with tubular supports 26. In the drying apparatus of according to the invention, all annular drying elements 15 are welded together in the annular base pieces 17, of such so that the through openings 25 are axially located in line, so that the holes on the opposite side have the same central axis. Therefore, it is possible to mount the elements elongated, axial 31 through the openings, for example, in shape of hollow tubes as shown in the figures. The elements 31 have at least a length that allows them spread over the space between two drying elements 15, adjacent, preferably, on three drying elements adjacent,

As shown in the figures, the elements 31 can be tubular and can be divided into pieces of clamp 31A for connection with drying elements 15 and in lifting parts 31B which can be configured in any desirable way to constitute an element of elevation. Areas 31B may have, for example, a shape. polygonal or directly a U shape, such that the product to be processed is elevated during rotation. Preferably, the elements 31 are subject to the first of the annular drying elements 15 by welding 31E. Preferably, the elements 31 are standard tubes with a diameter such that they substantially fill the tubular supports 26. A cover 33 can be provided on the end wall 32 of the housing, which is fastened, for example, with screws 34. When the cover is removed, it will then be possible to insert or remove the drying elements 31, in or from the rotor, because the openings can be aligned by the rotation of the rotor formed in the drying elements 15 with the openings that are extend below deck. The insertion of an item 31 It is indicated in the form of sketches.

In the example shown in the figures, the elongated elements 31 are placed in some of the openings 25 more exterior and in some of the more interior openings, but not in the openings that are located more towards the center. He number of elongated elements and the place where they are placed It depends on the degree to which it is desirable to increase agitation.

In the examples shown in the figures, four 31 elements displaced about 90 ° are inserted in the openings 25 more exterior and four elongated elements displaced also about 90 ° in the innermost openings, that is, eight elements in total.

It will become apparent to a person skilled in technique that the number of elements 31 and its positioning depend of several different factors, for example, the type of product that will be processed, in the manner in which it is desirable that it be handled, in the way the rotor is arranged and sized, etc.

Figure 8A shows an embodiment of the invention in which at one end all the tube elements elongated 31 are welded together by welding 31d with a manifold 39, which comprises a distribution chamber 40 and a feed pipe 41, for steam. Opposite ends of the elements 31 are eliminated by the closures 31c. With the steam heating forms a condensation, which can be driven in the same direction in which the steam is introduced. This can be done, for example, by slightly tilting the drying apparatus towards the manifold 39, for example, in a inclination of a few degrees, such that condensation can spontaneously return to collector 39.

Claims (13)

1. An annular drying element (15) for mounting on a rotor shaft in a drying apparatus and, in which the drying element comprises at least two annular plate elements, a first (16 ') and a second (16 '') plate element, wherein at least the first plate element (16 ') is configured with a number of through openings (25) in the plate; characterized in that the plate element (16 ') with said openings (25) is positioned opposite to the unperforated surface of the adjacent plate element, and that the plate elements are connected to each other by means of welds at the edges of the openings, and because the unperforated surface, which is located at the bottom of an opening, is perforated to provide through openings in the adjacent plate element, said through openings being demarcated by an outward festoon (55) extending along the entire periphery of the through openings to provide the annular drying element with a through hole that extends from one side to the other side of the drying element, and because the plate elements are joined together at an outer edge, by welding . 2. An annular drying element according to claim 1, characterized in that the tube parts (26) are inserted in the holes (54). 3. An annular drying element according to claim 2, characterized in that the tube parts (26) are positioned such that their longitudinal axes are located parallel to the axis (30) of the drying element. 4. An annular drying element according to claim 2 and 3, characterized in that the tube parts (26, 27) are secured as supports between the plate elements, which are configured with holes (54) corresponding to the tube parts (26). 5. An annular drying element according to claim 2 to 4, characterized in that the tube parts (26) have profiles in circular cross-section, and that the holes (54) in which they are preferably assembled by welding, are likewise Circular An annular drying element according to claim 2 to 5, characterized in that the tube pieces (26) have a length that substantially corresponds to the thickness of the element (15). 7. An annular drying element according to claim 2 to 6, characterized in that use is made of tube pieces (26) with different diameters. 8. A drying apparatus for heating or cooling wet crushed materials of animal, vegetable or chemical origin, comprising a stationary housing (32) and a rotating rotor comprising a number of annular drying elements (15), in accordance with the claim 1 each comprises at least two annular plate elements (16 ', 16'') provided with means for sending a means for heating or cooling said materials; and to conduct the possible condensation, and in which at least one of the plate elements is configured with a number of through openings (25) extending from one side of the plate to the other; characterized in that the plate element (16 ') with the openings (25) is arranged with said openings located in a manner opposite to the through openings of the adjacent plate element (16''), said through openings being demarcated by a festoon outwards ( 55) provided by a weld that extends along the entire periphery of the through openings, for the provision of an annular drying element with through holes (54), which extend from one side to the other side of the drying element (15); and because the plate elements (16 ', 16'') are also joined together at an outer edge (18) by welding. 9. A drying apparatus according to claim 8, characterized in that the drying elements (15) are positioned on the rotor (11) such that at least one of the through holes (54) is located in a axially opposite way in correspondence with the through holes formed in an adjacent element; and because in said holes (54) at least one elongated element (31) is inserted with a length which corresponds, at least, to the distance between the drying elements. 10. A drying apparatus according to claim 9, characterized in that the element (31) is divided into areas for connection with a drying element, and in intermediate areas for positioning between the drying elements, and is ready to lift / shake the product in the device. 11. A drying apparatus according to claim 9 and 10, characterized in that each element (31) is mechanically subjected to a drying element by, for example, welding. 12. A drying apparatus according to claim 9 to 11, characterized in that at least one of the elements (31) has a through cavity that is arranged for the introduction of a means for heating or cooling, for example steam for warm up. 13. A process for the production of an annular drying element (15) for mounting on a rotor shaft in a drying apparatus, and in which the drying element comprises at least two annular plate elements, a first ( 16 ') and a second (16'') plate element, in which at least the first plate element (16') is configured with a number of through openings (25) in the plate; characterized in that the plate element with said openings (25) is located with the openings opposite the unperforated surface (51) of the adjacent plate element; and because the plate elements (16 ', 16'') are connected to each other by means of a weld (52) that extends along the edge (53) of the openings for the provision of a festoon outward (55); and because the continuous through surface (51) located at the bottom of an opening (25) is perforated such that the through openings are demarcated by the festoon outward (55) to provide through holes (54) in the element annular drying, extending from one side to the other side of the drying element (15), and also joining the plate elements (16 ', 16'') to each other on an outer edge (18) by welding .