AU2019440120A1 - Combustion chamber for a hot gas generator of an asphalt production plant with air baffles and method for securing the air baffles - Google Patents
Combustion chamber for a hot gas generator of an asphalt production plant with air baffles and method for securing the air baffles Download PDFInfo
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- AU2019440120A1 AU2019440120A1 AU2019440120A AU2019440120A AU2019440120A1 AU 2019440120 A1 AU2019440120 A1 AU 2019440120A1 AU 2019440120 A AU2019440120 A AU 2019440120A AU 2019440120 A AU2019440120 A AU 2019440120A AU 2019440120 A1 AU2019440120 A1 AU 2019440120A1
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- Prior art keywords
- combustion chamber
- air baffles
- lugs
- air
- fastening
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 219
- 239000010426 asphalt Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims description 22
- 230000035515 penetration Effects 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 34
- 238000004140 cleaning Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
- F23M5/085—Cooling thereof; Tube walls using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
- F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
- F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/04—Supports for linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/03009—Elongated tube-shaped combustion chambers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
- Road Paving Machines (AREA)
- Working-Up Tar And Pitch (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention relates to a combustion chamber (4) for a hot gas generator (2) of an asphalt production plant (1). The combustion chamber (4) comprises a drum-like main body (6) with a burner end (A) and a hot gas outlet end (B), which main body is lined on the inside with multiple air baffles (7) for secondary air which follow one another in the combustion chamber circumferential direction. The outer sides of the air baffles (7) face the inside of the main body (6), and their inner sides form the delimitations of the combustion space (8) of the combustion chamber (4). At least some of the air baffles (7) are held in the main body (6) of the combustion chamber (4) by means of bracket and bolt arrangements (9a), in such a way that securing brackets (10) protruding radially over the inner sides of the air baffles (7) into the combustion chamber (8) are passed through by securing bolts (11), which produce a form fit in the radial direction between the securing brackets (10) and the inner sides of the air baffles (7). As a result of the invention it is possible to remove individual air baffles (7) from the combustion chamber interior and re-install them quickly, with a low material outlay and little effort, without destroying any components, whether this is for the purpose of replacement or to inspect and/or clean the secondary air region.
Description
Combustion chamber for a hot gas generator of an asphalt production installation
The present invention relates to a combustion chamber for a hot gas generator of an asphalt production installation, a hot gas generator comprising the combustion chamber, an installation for the production of asphalt comprising the hot gas generator, a use of the installation for drying and heating granular mineral and/or recycled asphalt material for asphalt production, a method for fixing air baffles in a base body of a combustion chamber for a hot gas generator, and a method for connecting air baffles following one another in the longitudinal direction of the combustion chamber in a base body of a combustion chamber for a hot gas generator according to the preambles of the independent patent claims.
In installations for drying and heating granular mineral and/or recycled asphalt material for asphalt production, drum dryers with rotating drying drums are used, in which a curtain of the granular material is formed, through which a hot gas stream passes. The material to be dried and heated passes through the drying drum in the same direction as the hot gas stream (co current drum dryer) or in an opposite direction to the hot gas stream (counter-current drum dryer). The hot gas stream is provided by a hot gas generator, usually fired with fossil fuels such as natural gas, fuel oil or pulverized coal, or e.g. also with wood dust, which comprises a combustion chamber and a burner. The combustion chamber in turn comprises a stationary base body, which is lined with air baffles that form the radial
MUE/RN boundaries of the combustion chamber's combustion space. Between the inside of the base body and the air baffles, secondary air is guided during operation as intended, which cools the air baffles and is introduced into the combustion chamber at various points via defined openings in order to obtain as homogeneous a flow of hot air as possible at a specific temperature at the outlet end of the combustion chamber. In the conventional combustors known today, the air baffles are held in an axially displaceable manner on the inside of the base body by retaining plates welded onto radial webs, and the air baffles following one another in the longitudinal direction of the combustor are in each case welded directly to one another or firmly connected to one another by welded-on connecting profile pieces. After prolonged operation of the combustion chamber, it may be necessary to replace individual air baffles. Also, over time, material can build up in the secondary air area between the inside of the base body and the air baffles, which can impair the air flow and thus the operation and make regular inspection/cleaning of this area necessary. However, replacing individual air baffles and inspecting and/or cleaning the secondary air area is very time consuming and labor intensive in today's combustors because it is not possible to easily and safely remove and subsequently reinstall individual air baffles.
Therefore, the objective is to provide technical solutions which do not exhibit the aforementioned disadvantages of the prior art or at least partially avoid them. This objective is reached by the subject matter of the independent patent claims.
According to these, a first aspect of the invention relates to a combustion chamber for a hot gas generator of an asphalt production installation. The combustion chamber comprises a drum-like base body having a burner end and a hot gas outlet end. On its inner side, viewed in the circumferential direction of the combustion chamber, the base body is lined with a plurality of successive air baffles for secondary air, the outer sides of which face the inner side of the base body and the inner sides of which form the boundaries of the combustion space of the combustion chamber. The secondary air used in generic combustors is usually hot gas or process air from associated processes, e.g. raw gas from a black material drum or chimney air. The air baffles may each extend as a single piece along the entire length of the combustor as viewed in the longitudinal direction of the combustor, or there may be a plurality of consecutive air baffles along the longitudinal direction of the combustor, which is preferred. At least some of the air baffles are held in the main body by means of lug/latch arrangements. This is achieved in that fastening lugs projecting radially beyond the inner sides of the air baffles into the combustion space are penetrated by fastening latches which produce a form fit in the radial direction towards the center of the combustion chamber between the fastening lugs and the inner sides of the air baffles. The invention makes it possible to remove individual air baffles from the combustion chamber interior without destroying components and then to reinstall them, with the purpose either to replace them or to carry out an inspection and/or cleaning of the secondary air area, with little expenditure of time, material and labor.
Preferably, retaining plates are arranged between the fastening lugs and the inner sides of the air baffles, which are penetrated by the fastening latches. The use of retaining plates has the advantage that the surface generating the radial form fit with the inside of the respective air baffle can be designed independently of the fastening latch and can thus be optimized for wear protection. In a first preferred variant, these retaining plates preferably rest without play on the inner sides of the respective air baffles, while on their other side they are adjacent to the respective fastening latch. This allows the air baffles to be fastened essentially without vibration. In a second preferred variant, stop surfaces are provided on the inside of the base body, against which the air baffles can abut or abut in a radially outward direction, and the retaining plates are at such a radial distance from these stop surfaces that the air baffles can move radially between these stop surfaces and the retaining plates by a certain amount of play. This clearance dimension is preferably at least 3 mm, in particular at least 5 mm. With this clearance dimension, it is possible to achieve simple assembly of the air baffles during manufacture of the combustion chamber by axial insertion from the hot gas outlet end of the combustion chamber. This also makes it possible to prevent or at least significantly reduce stresses in the event of manufacturing inaccuracies and thermal expansion. Advantageously, the fastening lugs are located between opposing boundaries of the air baffles extending in the longitudinal direction of the combustion chamber and into the combustion chamber, with the respective fastening latches and/or retaining plates overlapping these boundaries to form the radial form fit. In this way, free axial displaceability of the air baffles can be ensured in a simple and reliable manner.
It is preferred that the fastening lugs arranged between the boundaries of the air baffles running in the longitudinal direction of the combustion chamber are penetrated by the fastening latches in the circumferential direction of the combustion chamber. In this way, the lugs can be made very flat in the peripheral direction of the combustion chamber and the distance between the boundaries of the air baffles can be selected to be correspondingly very small. In a preferred embodiment, the base body of the combustion chamber is lined with several successive air baffles on its inner side, viewed both in the circumferential direction of the combustion chamber and in the longitudinal direction of the combustion chamber. Seen in the longitudinal direction of the combustion chamber, the air baffles therefore do not extend in one piece over the entire length of the combustion chamber, but rather several air baffles follow one another in the longitudinal direction of the combustion chamber. This has the advantage that the installation/removal of the air baffles is simplified and only certain areas can be removed for replacement or inspection purposes. In this embodiment, it is further preferred that the air baffles following one another in the longitudinal direction of the combustion chamber are connected to one another so that they expand together during heating and cooling and also contract together again without any significant gaps occurring between them. Advantageously, this is achieved by means of lug/latch arrangements in such a way that connecting lugs are formed on the boundaries of the successive air baffles opposite one another in the longitudinal direction of the combustion chamber, which lugs project radially into the combustion space and penetrate a common retaining plate that produces a form fit in the longitudinal direction of the combustion chamber between the connecting lugs. The free ends of the lugs, which emerge from the retaining
MUE/RN plate on the side facing the combustion chamber, are penetrated by a connecting latch which secures the retaining plate. This makes it possible to disconnect the air baffles from the combustion chamber interior without destroying components and then reconnect them, with the purpose either to replace individual air baffles or to inspect and/or clean the secondary air area, with a minimum of time, material and effort. In a first preferred variant, the connecting lugs, which pass through a common retaining plate, lie one above the other as seen in the direction of penetration of the connecting latch. In a second preferred variant, the connecting lugs which penetrate a common retaining plate lie adjacent to one another, as seen in the direction of penetration of the connecting latch. The common retaining plate can be secured with exactly one connecting latch which penetrates each of the connecting lugs passing through the retaining plate, or with several connecting latches which penetrate each of the connecting lugs passing through the retaining plate or only individual ones thereof. Depending on the installation situation, one or the other variant may be more preferable. If the connecting lugs which penetrate a common retaining plate are adjacent to one another as viewed in the direction in which the connecting latch passes through, it is provided, for example, that they together form a passage opening for a connecting latch. In this way, even with such arrangements of the connecting lugs, the desired connection can be made with a single connecting latch. The connecting lugs are advantageously penetrated by the connecting latches in the longitudinal direction of the combustion chamber or in the circumferential direction of the combustion chamber.
Depending on the installation situation, one or the other variant may be more preferred. The fastening latches and/or the connecting latches are preferably designed in such a way that they abut with a stop surface in a form-fitting manner in the direction of penetration on at least one of the fastening lugs or connecting lugs. In this way, assembly is facilitated and a precisely defined installation position can be ensured. In addition, any securing of the latches is only required at one end of the latches due to this embodiment. Such securing of the fastening latches and/or connecting latches is advantageously carried out by means of a material application applied exclusively to the surface of the latch by welding after assembly, in particular by means of one or more welding points which secure the latch in a form-fitting manner against removal from the intended position. Such a securing method has the advantage over welding to the lugs and/or retaining plates that the material application for removing the latch can be ground away easily with a grinding machine without removing material from other components, and the latch can then be used again. Preferably, the air baffles have a profiling extending in the longitudinal direction of the combustion chamber, so that they form flow channels for the secondary air extending in the longitudinal direction of the combustion chamber on their outer sides. Advantageously, at least some of the air baffles following one another in the longitudinal direction of the combustion chamber are designed in such a way, e.g. by means of a stepped profiling, that their mutually facing boundaries form outlet openings for secondary air from the respective flow channel extending behind them and pointing towards the hot air outlet end. The air baffles, which follow one another as seen in the longitudinal direction of the combustion
MUE/RN chamber and whose mutually facing boundaries form the air outlet openings pointing towards the hot air outlet end, are preferably connected to one another by means of lug/latch arrangements in such a way that connecting lugs, which project into the combustion space, are formed in the edge regions on the boundaries of the air baffles opposite one another in the longitudinal direction of the combustion chamber. These connecting lugs each penetrate a common retaining plate which produces a form fit in the longitudinal direction of the combustion chamber between the connecting lugs passing through it and is secured in each case by means of a connecting latch which passes through the connecting lugs on the side of the retaining plate facing the combustion space. This method of connecting the air baffles, which follow one another in the longitudinal direction of the combustion space, in the edge regions of the opposing boundaries thereof leaves the central region of the boundaries free and offers very great design freedom for forming the air outlet openings for secondary air. It is preferred that the connecting lugs, which each penetrate the common retaining plate, lie next to each other as seen in the direction of penetration of the connecting latch and together form a passage opening for a single common connecting latch, which passes through the connecting lugs in the circumferential direction of the combustion chamber. Such an implementation of the connection of the air baffles requires particularly little space in the circumferential direction of the combustion chamber and therefore offers maximum design freedom for the formation of the air outlet openings. It is further preferred that at least some of the air baffles following one another in the longitudinal direction of the combustion chamber are profiled in such a way that their mutually facing boundaries adjoin one another essentially without steps. Advantageously, at least some of these air baffles have air outlet openings
MUE/RN facing the combustion space for secondary air from a flow channel extending behind them. These air baffles, which have air outlet openings facing the combustion space, are preferably arranged between the hot gas outlet end and the air outlet openings facing the hot air outlet end, as seen in the longitudinal direction of the combustion chamber. It has been shown that in this way a particularly uniform temperature of the hot gas stream leaving the combustion chamber can be achieved. The air baffles, which follow one another in the longitudinal direction of the combustion chamber and are profiled in such a way that their mutually facing boundaries adjoin one another essentially without steps, are preferably connected to one another by means of lug/latch arrangements. The connection is designed in such a way that on the boundaries of the air baffles opposite each other in the longitudinal direction of the combustion chamber, connecting lugs are formed in the central regions and project into the combustion space. These connecting plates each penetrate a common retaining plate which produces a form fit in the longitudinal direction of the combustion chamber between the respective connecting tabs. The retaining plate is secured by means of a connecting latch which penetrates the connecting lugs on the side of the retaining plate facing the combustion space. Preferably, the connecting lugs which each penetrate the common retaining plate lie one above the other as seen in the direction of penetration of the connecting latch and are penetrated by a common connecting latch in the longitudinal direction of the combustion chamber. This type of connection of the air baffles following one another in the longitudinal direction of the combustion space is particularly easy to produce and is preferably implemented in the center of the opposing boundaries thereof. This results in the advantage that a single lug/latch connection is sufficient for the
MUE/RN connection of two air baffles which follow one another in the longitudinal direction of the combustion space. A second aspect of the invention relates to a hot gas generator for an asphalt production installation, which comprises a combustion chamber according to the first aspect of the invention and a burner for generating a hot gas flow through the combustion chamber. A third aspect of the invention relates to an asphalt production installation comprising a hot gas generator according to the second aspect of the invention and a drum dryer, preferably a countercurrent drum dryer, which is or can be charged with hot gas with the hot gas generator. A fourth aspect of the invention relates to the use of the installation according to the third aspect of the invention for drying and heating granular mineral and/or recycled asphalt material in asphalt production. A fifth aspect of the invention relates to a method for mounting air baffles in a base body of a combustion chamber for a hot gas generator. A drum-like base body of a combustion chamber for a hot gas generator is assumed, in which radially inwardly projecting fastening lugs for fastening air baffles are arranged. Air baffles are arranged in this base body in such a way that, when the combustion chamber is completed as intended, they form the radial boundaries of the combustion space of the combustion chamber, wherein the fastening lugs are arranged between opposite boundaries of the air baffles and/or penetrate the air baffles, and the free ends of the fastening lugs project radially beyond the air guide plates into the combustion space. The free ends of the fastening lugs projecting into the combustion space are penetrated by fastening latches in such a way that a form fit is created in the radial direction between the fastening lugs and the air baffles via the fastening latches. For this purpose, the
MUE/RN free ends of the fastening lugs have through-openings into which the fastening latches are inserted. The invention makes it possible to remove individual air baffles from the combustion chamber interior without destroying components and then to reinstall them, with the purpose either to replace them or to check and/or clean the secondary air area, with little expenditure of time, material and labor. Advantageously, the air baffles are arranged in the base body in such a way that the fastening lugs protrude into the combustion chamber between opposing boundaries of the air baffles running in the longitudinal direction of the combustion chamber, with the respective fastening latches and/or any retaining plates present overlapping these boundaries to form the radial form fit. In this way, free axial displacement of the air baffles can be ensured in a simple and reliable manner. It is preferred that the fastening lugs arranged between the boundaries of the air baffles running in the longitudinal direction of the combustion chamber are penetrated by the fastening latches in the circumferential direction of the combustion chamber. In this way, the lugs can be made very flat in the circumferential direction of the combustion chamber and the distance between the boundaries of the air baffles can be selected to be correspondingly very small. Preferably, retaining plates through which the fastening lugs pass are arranged between the fastening lugs and the inner sides of the air baffles. The use of retaining plates has the advantage that the surface generating the radial form fit with the inside of the respective air baffle can be designed independently of the fastening latch and can thus be optimized for wear protection. In a first preferred variant, the retaining plates are arranged in such a way that they preferably rest without play on the inner sides of the respective air
MUE/RN baffles, while on their other side they adjoin the respective fastening latch. This allows the air baffles to be fastened essentially without vibration. In a second preferred variant, stop surfaces are provided on the inside of the base body, against which the air baffles abut or can abut in a radially outward direction. The retaining plates are arranged at such a radial distance from these stop surfaces that the air baffles can move radially by a certain amount between these stop surfaces and the retaining plates. This clearance dimension is preferably at least 3 mm, in particular at least 5 mm. With this clearance dimension, it is possible to achieve simple assembly of the air baffles during manufacture of the combustion chamber by axial insertion from the hot gas outlet end of the combustion chamber. It is also possible to prevent or at least significantly reduce stresses in the event of manufacturing inaccuracies and thermal expansion. A sixth aspect of the invention relates to a method for connecting air baffles following one another in the longitudinal direction of the combustion chamber in a base body of a combustion chamber for a hot gas generator. Air baffles are provided which have connecting latches projecting at the ends from the surface of the respective air baffle provided for forming a combustion space boundary of the combustion chamber. These air baffles are arranged in a base body of a combustion chamber for a hot gas generator in such a way that the air baffles form the radial boundaries of the combustion space when the combustion chamber is completed as intended. The end connecting plates of air baffles which follow one another in the longitudinal direction of the combustion chamber are opposite and/or adjacent to one another. A retaining plate with a passage opening is arranged on each of the opposing and/or adjacent connecting plates in such a way that the connecting plates
MUE/RN penetrate the passage opening of the retaining plate and project into the combustion space with their free ends beyond the side of the retaining plate facing the combustion space. The retaining plates generate a form fit in the longitudinal direction of the combustion chamber between the connecting latches. The retaining plates are each secured by means of a connecting latch which penetrates at least one of the connecting lugs on the side of the retaining plate facing the combustion space. The invention makes it possible to remove individual air baffles from the combustion chamber interior without destroying components and then to reinstall them, either to replace them or to carry out an inspection and/or cleaning of the secondary air area, with little expenditure of time, material and labor. In the methods according to the fifth and sixth aspects of the invention, the fastening and/or connecting latches are preferably positively secured against removal from their intended position by means of an application of material applied exclusively to the surface of the latch by welding after it has been installed, in particular by means of one or more welding points. Such a securing method has the advantage over welding with the lugs and/or retaining plates that the material application for removing the latch can be ground away easily with a grinding machine without destroying or impairing other components and, moreover, the latch can subsequently be used again.
Further embodiments, advantages and applications of the invention will be apparent from the dependent claims and from the description which now follows with reference to the figures. Thereby show:
Fig. 1 a perspective view of a longitudinal section through a hot gas generator and drum dryer assembly according to the invention of an asphalt production installation; Fig. 2 a perspective view of a longitudinal section through the combustion chamber according to the invention of the hot gas generator of the asphalt production installation of Fig. 1; Fig. 3 the detail X of Fig. 2; Fig. 4 the detail Y of Fig. 2; Fig. 5 an enlarged view of a part of the illustration of Fig. 3; Fig. 6 an enlarged view of a part of the illustration of Fig. 4; Fig. 7 a section along the line C-C of Fig. 6; Fig. 8 a section along line A-A of Fig. 5; Fig. 9 a section along line B-B of Fig. 6; Fig. 10a a perspective view of the lug/latch arrangement designated by reference 9a of Figs. 3-6; Fig. 10b a perspective exploded view of the lug/latch arrangement of Fig. 10a; Fig. 11a a perspective view of the lug/latch arrangement designated by reference 9b in Figs. 3 and 5; Fig. lb a perspective exploded view of the lug/latch arrangement in Fig. 11a; Fig. 12a a perspective view of the lug/latch arrangement designated by reference 9c in Figs. 4 and 6; Fig. 12b a perspective exploded view of the lug/latch arrangement of Fig. 12a;
Fig. 1 shows a longitudinal section through the hot gas generator and the drum dryer of an asphalt production installation 1 according to the invention in a perspective view from obliquely above.
As can be seen, the installation 1 comprises a hot gas generator 2 according to the invention and a countercurrent drum dryer 3 for drying and heating granular mineral and/or recycled asphalt material for asphalt production, the internal structure of which is not shown in more detail. As can be seen from Fig. 2, which shows an enlarged view of the longitudinal section through the combustion chamber 4 of the hot gas generator 2 of the asphalt production installation 1 according to the invention of Fig. 1 from a different perspective, the combustion chamber 4 comprises a drum-like base body 6 with a burner end A and a hot gas outlet end end B. The base body 6 is lined on its inner side, both as seen in the circumferential direction of the combustion chamber and as seen in the longitudinal direction S of the combustion chamber, with a plurality of successive air baffles 7 (only some of which are provided with references), the outer sides of which face the inner side of the base body 6 and the inner sides of which form the boundaries of the combustion space 8 of the combustion chamber 4. The air baffles 7 have a profiling extending in the longitudinal direction S of the combustion chamber, whereby they form flow channels for secondary air on their outer sides extending in the longitudinal direction S of the combustion chamber. As can be seen in combination with Figures 3 and 4, which show details X and Y of Fig. 2, a part of the air baffles 7, namely the air baffles 7 which form the fourth to sixth circumferential row of air baffles 7 as viewed downstream of the burner end A, is held in the base body 6 by means of lug/latch arrangements 9a. As shown in further combination with Figs. 5 and 6, which show enlarged views of portions of the representations in Figs. 3 and 4, with Fig. 7, which shows a section along line C-C in Fig. 6, and with Figs. 10a and
10b, which show a perspective view of one of these lug/latch arrangements 9a and a perspective exploded view thereof, these lug/latch arrangements 9a are implemented in such a way that fastening lugs 10 projecting radially beyond the inner sides of the air baffles 7 into the combustion space 8 are penetrated by fastening latches 11, which produce a form fit in the radial direction between the fastening lugs 10 and the inner sides of the air baffles 7. Retaining plates 12, through which the fastening lugs 10 pass, are arranged between the fastening lugs 11 and the inner sides of the air baffles 7. As can be seen in particular in Fig. 7, the inside of the base body 6 forms stop surfaces 22 against which the air baffles 7 can abut or abut in a radially outward direction, and wherein the retaining plates 12 are at such a distance a from these stop surfaces 22 that the air baffles 7 can move radially between these stop surfaces 22 and the retaining plates 12 by the clearance dimension d. In the present case, this clearance dimension d is about 5 mm. As can be seen further, the fastening lugs 10 project into the combustion space 8 between opposing boundaries 13 of the air baffles 7 running in the longitudinal direction of the combustion chamber S, and the fastening latches 11 and retaining plates 12 overlap these boundaries 13. The fastening latches 11 thereby penetrate the fastening lugs 10 in the circumferential direction of the combustion chamber. As can be seen from a combination of Figures 2, 3 and 5, a part of the air baffles 7 following one another as viewed in the longitudinal direction of the combustion chamber S, namely the air baffles 7 which form the second to fourth circumferential row of air baffles 7 as viewed downstream of the burner end A, is profiled in such a way that their mutually facing boundaries 14 form air outlet openings 15 pointing towards the hot air outlet
MUE/RN end B for secondary air from the flow channels extending therebehind. As can be seen further, each of the air baffles 7 forming an air outlet opening 15 together are connected to each other by means of two lug/latch arrangements 9b, so that they can only move axially together in the longitudinal direction S of the combustion chamber in the event of thermal expansion or shrinkage. As can be seen in conjunction with Fig. 7 8which shows a radial section along line A-A in Fig. 5, and with Figs. 11a and lb, which show a perspective view of one of these lug/latch arrangements 9b as well as a perspective exploded view of the same, these lug/latch arrangements 9b are implemented in each case by the fact that connecting lugs 16a, 16b are formed in the edge regions at the boundaries 14, opposite one another in the longitudinal direction S of the combustion chamber, of the successive air baffles 7, which lugs project into the combustion space 8 and penetrate a common retaining plate 17 which produces a form fit in the longitudinal direction S of the combustion chamber between the connecting lugs 16a, 16b. The retaining plate 17 is secured by means of a connecting latch 18 which penetrates a passage opening formed jointly by the two connecting lugs 16a, 16b on the side of the retaining plate 17 facing the combustion space 8. As can be seen, the connecting lugs 16a, 16b are each adjacent to each other as viewed in the direction of passage of the connecting latch 18 and each forms one half of the passage opening for the connecting latch 18 which penetrates the passage opening formed by the connecting lugs 16a, 16b in the circumferential direction of the combustion chamber. As can be seen from a combination of Figures 2, 4 and 6, a part of the air baffles 7 following one another as viewed in the longitudinal direction of the combustion chamber S, namely the air baffles 7 which, as viewed downstream of the burner end A, form the first and
MUE/RN second and the fourth to eighth circumferential rows of air baffles 7, is profiled in such a way that their mutually facing boundaries 14 adjoin one another substantially without steps. In this connection, the air baffles 7, which form the fifth and sixth circumferential rows of air baffles 7 as viewed downstream of the burner end A, have air outlet openings 19 (only some of which are provided with references) facing toward the combustion space 8 for secondary air from the flow channel extending behind them. As can be seen further, the air baffles 7 following one another as seen in the longitudinal direction of the combustion chamber S, which form the fourth to sixth circumferential row of air baffles 7 as seen downstream of the burner end A, are each connected to one another by means of precisely one lug/latch arrangement 9c, so that they can only move axially together in the longitudinal direction of the combustion chamber S in the event of thermal expansion or shrinkage. As shown in combination with Fig. 9, which shows a section along the line B-B in Fig. 6, and with Figs. 12a and 12b, which show a perspective view of one of these lug/latch arrangements 9c and a perspective exploded view thereof, this lug/latch arrangement 9c is implemented in that connecting tabs 21a, 21b are formed on the boundaries 14 of the successive air baffles 7, which boundaries are opposite one another in the longitudinal direction S of the combustion chamber, in the middle of these boundaries 14, which tabs project into the combustion space 8 and penetrate a common retaining plate 17 which produces a form fit in the longitudinal direction S of the combustion chamber between the connecting lugs 21a, 21b. The retaining plate 17 is secured by means of a connecting latch 18 which passes through both connecting lugs 21a, 21b. As can be seen, the connecting tabs 21a, 21b are superimposed as viewed in the direction of penetration
MUE/RN of the connecting latch 18 and are penetrated by the connecting latch 18 in the longitudinal direction S of the combustion chamber. All fastening and connecting latches 11, 18 are formed in a stepped manner so that they abut in a form-fitting manner in the direction of penetration with stop surfaces 23 formed by the step on the fastening lug 10, on the connecting lug 21a and on the two connecting lugs 16a, 16b, respectively. In addition, all fastening and connecting latches 11, 18 are positively secured against removal by means of a weld spot 20 provided on their combustion chamber-side surface. While preferred embodiments of the invention are described in the present application, it should be clearly noted that the invention is not limited to these and may be carried out in other ways within the scope of the claims which now follow.
Claims (36)
1. Combustion chamber (4) for a hot gas generator (2) of an asphalt production installation (1), comprising a drum-like base body (6) with a burner end (A) and a hot gas outlet end (B), which is lined on its inner side, as viewed in the circumferential direction of the combustion chamber, with a plurality of successive air baffles (7), the outer sides of which face the inner side of the base body (6) and the inner sides of which form the boundaries of the combustion space (8) of the combustion chamber (4), wherein at least some of the air baffles (7) are held in the base body (6) by means of lug/latch arrangements (9a) in such a way that fastening lugs (10) projecting radially beyond the inner sides of the air baffles (7) into the combustion space (8) are penetrated by fastening latches (11) which produce a form fit in the radial direction pointing towards the center of the combustion chamber between the fastening lugs (10) and the air baffles (7).
2. Combustion chamber (4) according to claim 1, wherein retaining plates (12), through which the fastening lugs (10) pass, are arranged between the fastening latches (11) and the inner sides of the air baffles (7).
3. Combustion chamber (4) according to claim 2, wherein the retaining plates (12) rest on the inner sides of the air baffles (7).
4. Combustion chamber (4) according to one of claims 2 to 3, wherein stop surfaces (22) are present on the inside of the base body (6), against which the air baffle plates (7) abut or can abut in a radially outwardly pointing manner, and wherein the retaining plates (12) are
MUE/RN at such a distance (a) from these stop surfaces (22), that the air guide plates (7) can move radially between these stop surfaces (22) and the retaining plates (12) by a certain clearance dimension (d), and in particular wherein the clearance dimension (d) is at least 3 mm, in particular at least 5 mm.
5. Combustion chamber (4) according to one of the preceding claims, wherein at least some of the fastening lugs (10) project into the combustion space (8) between opposing boundaries (13) of the air baffles (7) extending in the longitudinal direction (S) of the combustion chamber, and the respective fastening latches (11) and/or retaining plates (12) engage over these boundaries (13).
6. Combustion chamber (4) according to claim 5, wherein the fastening lugs (10) arranged between boundaries (13) of the air baffles (7) extending in the longitudinal direction (S) of the combustion chamber are penetrated in the circumferential direction of the combustion chamber by the fastening latches (11).
7. Combustion chamber (4) according to one of the preceding claims, wherein the base body (6) of the combustion chamber (4) is lined on its inner side with a plurality of successive air baffles (7), viewed both in the circumferential direction of the combustion chamber and in the longitudinal direction (S) of the combustion chamber.
8. Combustion chamber (4) according to claim 7, wherein at least some of the air baffles (7) following one another in the longitudinal direction (S) of the combustion chamber are connected to one another by means of lug/latch arrangements (9b, 9c) in such a way that connecting lugs (16a, 16b; 21a, 21b) are formed, which
MUE/RN project into the combustion space (8) and pass through a common retaining plate (17), which produces a form fit in the longitudinal direction (S) of the combustion chamber between the connecting lugs (16a, 16b; 21a, 21b) and is secured by means of a connecting latch (18), which passes through at least one of the connecting lugs (16a, 16b; 21a, 21b) on the side of the retaining plate (17) facing the combustion space (8).
9. Combustion chamber (4) according to claim 8, wherein at least a part of the connecting lugs (21a, 21b) which penetrate a common retaining plate (17) lie one above the other as seen in the direction of penetration of the connecting latch (18).
10. Combustion chamber (4) according to one of claims 8 to 9, wherein at least a part of the connecting lugs (16a, 16b) which penetrate a common retaining plate (17), lie adjacent to one another, as seen in the direction of penetration of the connecting latch (18).
11. Combustion chamber (4) according to one of claims 8 to 10, wherein the common retaining plate (17) is secured with exactly one connecting latch (18) which penetrates each of the connecting lugs (16a, 16b; 21a, 21b) passing through the retaining plate (17).
12. Combustion chamber (4) according to claim 10 and according to claim 11, wherein the connecting lugs (16a, 16b), which penetrate a common retaining plate (17) and, viewed in the direction of penetration of the connecting latch (18), lie adjacent to one another, together form a passage opening for the connecting latch (18).
13. Combustion chamber (4) according to one of claims 8 to 12, wherein at least a part of the connecting
MUE/RN lugs (21a, 21b) is penetrated by the connecting latches (18) in the longitudinal direction (S) of the combustion chamber.
14. Combustion chamber (4) according to one of claims 8 to 13, wherein at least a part of the connecting lugs (16a, 16b) is penetrated by the connecting latches (18) in the circumferential direction of the combustion chamber.
15. Combustion chamber (4) according to one of the preceding claims, wherein at least a part of the fastening latches (11) and/or connecting latches (18) abuts with a stop surface in a form-fitting manner in the penetration direction against at least one of the fastening lugs (10) or connecting lugs (16a, 16b; 21a), respectively.
16. Combustion chamber (4) according to one of the preceding claims, wherein at least a part of the fastening lugs (10) and/or connecting latches (18) is secured in a form-fitting manner against removal from the intended position by means of a material application applied exclusively to the surface of the latch (10;18) by welding after assembly thereof, in particular by means of one or more welding points (20).
17. Combustion chamber according to one of the preceding claims, wherein at least a part of the fastening latches and/or connecting latches is secured in the intended position by means of a weld between the latch and a fastening or connecting latch and/or a retaining plate produced after the assembly of the latch.
18. Combustion chamber (4) according to one of the preceding claims, wherein at least a part of the air baffle plates (7) has a profiling extending in the
MUE/RN longitudinal direction (S) of the combustion chamber in such a way that they form flow channels extending in the longitudinal direction (S) of the combustion chamber on their outer sides.
19. Combustion chamber (4) according to claim 7 and according to claim 18, wherein at least a part of the air baffles (7) following one another as seen in the longitudinal direction (S) of the combustion chamber is profiled in such a way that their mutually facing boundaries (14) form air outlet openings (15) pointing towards the hot air outlet end (B) from a flow channel extending therebehind.
20. Combustion chamber (4) according to claim 19, wherein the air guide plates (7), which follow one another as seen in the longitudinal direction (S) of the combustion chamber and whose mutually facing boundaries (14) form the air outlet openings (15) pointing towards the hot air outlet end (B), are connected to one another by means of lug/latch arrangements (9b) in such a way that connecting lugs (16a, 16b) are formed in the edge areas at the boundaries (14), which are mutually opposite in the longitudinal direction (S) of the combustion chamber, of the air baffles (7), which connecting lugs project into the combustion space (8) and in each case penetrate a common retaining plate (17) which produces a form fit in the longitudinal direction (S) of the combustion chamber between the respective connecting lugs (16a, 16b) and is secured in each case by means of a connecting latch (18) which penetrates the respective connecting lugs (16a, 16b) on the side of the retaining plate (17) facing the combustion space (8).
21. Combustion chamber (4) according to claim 20, wherein the connecting lugs (16a, 16b), which each penetrate the common retaining plate (17), lie adjacent to
MUE/RN one another as seen in the direction of penetration of the connecting latch (18) and together form a passage opening for a common connecting latch (18), which passes through the connecting lugs (16a, 16b) in the circumferential direction of the combustion chamber.
22. Combustion chamber (4) according to claim 7 and according to claim 18, wherein at least a part of the air baffles (7) following one another as seen in the longitudinal direction (S) of the combustion chamber is profiled in such a way that their mutually facing boundaries (14) adjoin one another substantially continuously, and in particular that at least a part of these air baffles (7) has air outlet openings (19) pointing towards the combustion space (8) from a flow channel extending therebehind.
23. Combustion chamber (4) according to one of claims 19 to 21 and according to claim 22, wherein the air baffles (7), which have air outlet openings (19) pointing towards the combustion space (8) from a flow channel extending therebehind, lie between the hot gas outlet end (B) and the air outlet openings (15) pointing towards the hot air outlet end (B), viewed in the longitudinal direction (S) of the combustion chamber.
24. Combustion chamber (4) according to one of claims 22 to 23, wherein the air baffles (7), which follow one another as seen in the longitudinal direction (S) of the combustion chamber and are profiled in such a way that their mutually facing boundaries (14) adjoin one another substantially continuously, are connected to one another by means of lug/latch arrangements (9c) in such a way that, connecting lugs (21a, 21b) are formed in the central regions on the boundaries (14) of the air baffles (7) lying opposite one another in the longitudinal direction of the combustion chamber, which project into the
MUE/RN combustion space (8) and in each case penetrate a common retaining plate (17) which produces a form fit in the longitudinal direction (S) of the combustion chamber between the respective connecting lugs (21a, 21b) and is secured in each case by means of a connecting latch (18) which passes through the respective connecting lugs (21a, 21b) on the side of the retaining plate (17) facing the combustion chamber (8).
25. Combustion chamber (4) according to claim 24, wherein the connecting lugs (21a, 21b), which each penetrate the common retaining plate (17), lie one above the other as seen in the direction of penetration of the connecting latch (18) and are penetrated by a common connecting latch (18) in the longitudinal direction (S) of the combustion chamber.
26. Hot gas generator (2) for an asphalt production installation (1), comprising a combustion chamber (4) according to any of the preceding claims and a burner (5) for generating a hot gas flow through the combustion chamber (4).
27. Installation (1) for the production of asphalt, comprising a hot gas generator (2) according to claim 26 and a drum dryer (3), in particular a countercurrent drum dryer (3), which is or can be fed with hot gas with the hot gas generator (2).
28. Use of the installation (1) according to claim 27 for drying and heating granular mineral and/or recycled asphalt material for asphalt production.
29. Method for fastening air baffles (7) in a base body (6) of a combustion chamber (4) for a hot gas generator (2), comprising the steps:
MUE/RN a) providing a drum-like base body (6) of a combustion chamber (4) for a hot gas generator (2) with fastening lugs (10) projecting radially inwards therein for fastening air baffles (7); b) arranging air baffles (7) in the base body (6) in such a way that these form the radial boundaries of the combustion space (8) of the combustion chamber (4) as intended, wherein the fastening lugs (10) are arranged between opposite boundaries (13) of the air baffles (7) and/or penetrate the air baffles (7), and wherein the fastening lugs (10) project radially beyond the air baffles (7) into the combustion space (8); c) penetrating the ends of the fastening lugs (10) projecting into the combustion space (8) with fastening latches (11) in such a way that a form fit is produced in the radial direction between the fastening lugs (10) and the air baffles (7).
30. Method according to claim 29, wherein the air baffles (7) are arranged in the base body (6) in such a way that at least some of the fastening lugs (10) are arranged between boundaries (13) of the air baffles (7) extending in the longitudinal direction (S) of the combustion chamber.
31. Method according to claim 30, wherein the ends of the fastening lugs (10) projecting into the combustion space (8), which are arranged between boundaries (13) of the air baffles (7) extending in the longitudinal direction (S) of the combustion chamber, are penetrated in the circumferential direction of the combustion chamber by fastening lugs (11).
32. Method according to one of the claims 29 to 31, wherein retaining plates (12), which are penetrated by the respective fastening lugs (10), are arranged
MUE/RN between the fastening latches (11) and the sides of the air baffles (7) facing the combustion space (8).
33. Method according to claim 32, wherein the retaining plates (12) are arranged in such a way that they rest on the inner sides of the air baffles (7).
34. Method according to one of claims 32 to 33, wherein stop surfaces (22) are present on the inside of the base body (6), against which the air baffles (7) abut or can abut in a radially outwardly pointing manner, and wherein the retaining plates (12) are arranged at such a distance (a) from these stop surfaces (22), that the air baffles (7) can move radially between these stop surfaces (22) and the retaining plates (12) by a certain clearance dimension (d), and in particular wherein the clearance dimension (d) is at least 3 mm, in particular at least 5 mm.
35. Method for connecting air baffles (7) following one another in the longitudinal direction (S) of the combustion chamber in a base body (6) of a combustion chamber (4) for a hot gas generator (2), comprising the steps: a) providing air baffles (7) with connecting lugs (16a, 16b; 21a, 21b) which protrude at the ends from the surface of the respective air baffle (7) provided for forming a combustion chamber boundary; b) arranging the air baffles (7) in a base body (6) of a combustion chamber (4) for a hot gas generator (2) in such a way that the air baffles (7) form a radial boundary of the combustion space (8) of the combustion chamber (4) as intended, wherein the end connecting lugs (16a, 16b; 21a, 21b) of air baffles (7) following one another in the longitudinal direction (S) of the combustion chamber are opposite and/or adjacent to one another;
MUE/RN c) arranging in each case a retaining plate (17) with a passage opening on the respective connecting lugs (16a, 16b; 21a, 21b) lying opposite and/or adjoining one another in such a way that the connecting lugs (16a, 16b; 21a, 21b) penetrate the passage opening of the retaining plate (17) and project beyond the retaining plate (17) into the combustion space (8), wherein the retaining plate (17) produces a form fit in the longitudinal direction (S) of the combustion chamber between the connecting lugs (16a, 16b; 21a, 21b); and d) securing the respective retaining plate (17) by means of a connecting latch (18) which penetrates at least one of the connecting lugs (16a, 16b; 21a, 21b) on the side of the retaining plate (17) facing the combustion space (8).
36. Method according to one of claims 27 to 35, wherein at least a part of the fastening lugs (10) and/or connecting lugs (16a, 16b; 21a, 21b) is secured in a form fitting manner against removal from the intended position by means of a material application (20), in particular one or more welding points (20), applied exclusively to the surface of the lug after its assembly.
MUE/RN
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2019/058470 WO2020200450A1 (en) | 2019-04-04 | 2019-04-04 | Combustion chamber for a hot gas generator of an asphalt production plant with air baffles and method for securing the air baffles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2019440120A1 true AU2019440120A1 (en) | 2021-10-28 |
| AU2019440120B2 AU2019440120B2 (en) | 2023-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019440120A Active AU2019440120B2 (en) | 2019-04-04 | 2019-04-04 | Combustion chamber for a hot gas generator of an asphalt production plant with air baffles and method for securing the air baffles |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP3931488B1 (en) |
| CN (1) | CN113825950B (en) |
| AU (1) | AU2019440120B2 (en) |
| DK (1) | DK3931488T3 (en) |
| ES (1) | ES2952249T3 (en) |
| FI (1) | FI3931488T3 (en) |
| PL (1) | PL3931488T3 (en) |
| WO (1) | WO2020200450A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130364A (en) * | 1977-04-28 | 1978-12-19 | Brown Ralph E | Method and portable apparatus for treating asphalt paving material |
| FR2646880A1 (en) * | 1989-05-11 | 1990-11-16 | Snecma | THERMAL PROTECTION SHIRT FOR POST-COMBUSTION CHANNEL OR TRANSITION OF TURBOREACTOR |
| US5363643A (en) * | 1993-02-08 | 1994-11-15 | General Electric Company | Segmented combustor |
| EP1533574A1 (en) * | 2003-11-24 | 2005-05-25 | Siemens Aktiengesellschaft | Gas turbine combustion chamber with lining elements and method to apply or remove these elements |
| DE202006014390U1 (en) * | 2006-09-15 | 2006-11-30 | Leister Process Technologies | Hot air welding nozzle for hot air welding device has at least one forward outlet aperture pointing in direction of motion of welding device |
| DE202008012970U1 (en) * | 2008-09-30 | 2009-02-12 | Ammann Schweiz Ag | Combustion chamber for a hot gas generator |
| DE202008012971U1 (en) * | 2008-09-30 | 2008-12-24 | Ammann Schweiz Ag | Plant for drying and heating granulated material for asphalt production |
| KR101128685B1 (en) * | 2011-10-06 | 2012-03-27 | 김병구 | Recycle drier in apparatus of regenerating waste ascon |
| FR2986016B1 (en) * | 2012-01-25 | 2014-03-21 | Argumat | DEVICE AND METHOD FOR MANUFACTURING COATED PRODUCTS, FOR EXAMPLE OF BITUMINOUS COATED PRODUCTS, WITH PROTECTIVE PLATES |
| JP6261036B2 (en) * | 2013-01-25 | 2018-01-17 | 有限会社 トラスト２１ | Combustion device |
| JP6315551B2 (en) * | 2014-01-17 | 2018-04-25 | 日工株式会社 | Asphalt mixture production equipment |
| CN105951559B (en) * | 2016-05-12 | 2018-04-13 | 吉林省嘉鹏集团有限公司 | A kind of in-situ heat regeneration machine exhaust gas centralized processor |
| EP3327349A1 (en) * | 2016-11-23 | 2018-05-30 | Benninghoven GmbH & Co.KG Mülheim | Hot gas generator for heating gas and system for asphalt manufacture with such a hot gas generator |
| CN208293356U (en) * | 2018-06-05 | 2018-12-28 | 福建泉成机械有限公司 | A kind of reclaimed asphalt mixture drying drum |
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2019
- 2019-04-04 WO PCT/EP2019/058470 patent/WO2020200450A1/en unknown
- 2019-04-04 ES ES19716359T patent/ES2952249T3/en active Active
- 2019-04-04 FI FIEP19716359.5T patent/FI3931488T3/en active
- 2019-04-04 PL PL19716359.5T patent/PL3931488T3/en unknown
- 2019-04-04 AU AU2019440120A patent/AU2019440120B2/en active Active
- 2019-04-04 EP EP19716359.5A patent/EP3931488B1/en active Active
- 2019-04-04 DK DK19716359.5T patent/DK3931488T3/en active
- 2019-04-04 CN CN201980096210.6A patent/CN113825950B/en active Active
Also Published As
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|---|---|
| FI3931488T3 (en) | 2023-08-08 |
| CN113825950A (en) | 2021-12-21 |
| DK3931488T3 (en) | 2023-08-07 |
| WO2020200450A1 (en) | 2020-10-08 |
| AU2019440120B2 (en) | 2023-08-31 |
| ES2952249T3 (en) | 2023-10-30 |
| CN113825950B (en) | 2024-05-17 |
| EP3931488B1 (en) | 2023-05-17 |
| PL3931488T3 (en) | 2023-09-18 |
| EP3931488A1 (en) | 2022-01-05 |
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