EP1743131A1

EP1743131A1 - Bulk-material cooler for cooling hot material to be cooled

Info

Publication number: EP1743131A1
Application number: EP05739685A
Authority: EP
Inventors: Christian Splinter; Karl Schinke
Original assignee: KHD Humboldt Wedag AG
Current assignee: KHD Humboldt Wedag AG
Priority date: 2004-05-07
Filing date: 2005-05-03
Publication date: 2007-01-17
Anticipated expiration: 2025-05-03
Also published as: JP2007536494A; US7708556B2; CN1981174B; DE502005008050D1; WO2005114080A1; DK1743131T3; BRPI0510605A; RU2006143210A; US20070259298A1; NO20065623L; CN1981174A; DE102004022754A1; PL1743131T3; ATE441825T1; EP1743131B1; ES2333135T3; MXPA06012681A; JP5009150B2; RU2397419C2

Abstract

The aim of the invention is to design a bulk-material cooler, particularly one for cooling cement clinker, which operates according to the walking floor principle, so that its cooling grate can be composed of a multitude of ventilated cooling grate modules, which can be assembled in an easy and variable manner, in order to obtain large lengths and widths of the cooler. When these cooling grate modules move between an advancing and returning position, even lateral and/or height offset of the guiding elements can be compensated for in a kinematic manner. To this end, the invention provides that the cooling grate, when viewed over the length and width of the cooler, is composed of a multitude of modules (13, 14) ventilated with cooling air. The coupling of the cooling grate modules of each longitudinal row of cooling grate modules is effected by an articulated joint.

Description

Bulk cooler for cooling hot chilled goods

DESCRIPTION

The invention relates to a bulk material cooler with a cooled goods to be cooled such. B. hot cement clinker carrying cooling grid, which transports the flowed through by a cooling gas refrigerated goods from Kühlguteintragsende for Kühlgutaustragsende.

Grate coolers are used in the stone and earth industry to the previously burned in an oven good such. As cement clinker or other mineral goods immediately afterwards cool down strongly on the cooling grate. For the purpose of transporting the hot goods to be cooled via the cooling section, the grate cooler is particularly widespread, in which the grate system consists of a plurality of alternately stationary and movable grate plate carriers, on each of which a plurality of grate plates provided with cooling air openings and substantially flowed from bottom to top of the grate air are mounted , Stationary grate plate rows alternate with reciprocating grate plate rows as seen in the conveying direction, which are fastened via their corresponding reciprocating grate plate carriers to one or more longitudinally movably mounted driven push frames. Due to the common oscillating movement of all moving rows of grate plates, the hot material to be cooled is transported in batches and thereby cooled.

As an alternative to o. G. conventional grate cooler is out of the

EP-1 021 692 B1 discloses a type of grate cooler in which the cooling air flowed through by cooling air is not moved, but is fixed, wherein A plurality of rows of adjacent reciprocating bar-shaped pusher elements are arranged above the fixed grate surface transversely to the refrigerated goods transport direction, which are moved between a feed position in the refrigerated goods transport direction and a return stroke position, so that the reciprocating movement of these pusher elements in the good bed to be cooled The material from the beginning of the cooler to the end of the cooler is gradually moved and cooled. In the case of a similar type of grate cooler known from DE 100 18 142 A1, it is still known to divide the movable thrust elements above the fixed cooling grate floor into at least two groups and to move the thrust elements jointly forward in the transport direction, but not together, but separately to move back again.

In these known types of grate coolers, the delivery rate is decisively influenced by the difference between the cement clinker volume moved in each advance stroke in the conveying direction and the clinker volume which is undesirably moved counter to the conveying direction during the return stroke. In addition, in these known types of grate coolers, the crossbar-shaped pushers are mounted on the upper side of vertical drive plates aligned in the longitudinal direction of the radiator and extend through corresponding longitudinal slots of the cooling grate and are driven from beneath the grate, whereby it is relatively expensive to load the chilled grate loaded with refrigerated goods To seal at the passage points of the drive plates against rust diarrhea while keeping the material wear occurring within limits. The pusher elements moved in the hot cement clinker bed are exposed to high thermal-mechanical wear, which shortens the service life of the grate cooler. Finally, the hot bulk material bed is moved as a result of the pusher elements moving in the good bed mixed by these, but which adversely affects the thermal efficiency of such grate cooler types.

In addition, from DE 196 51 741 A1 discloses a cooling tunnel for cooling and / or freezing of refrigerated goods using cold air with the use of the so-called "walking floor" conveying principle, in which several juxtaposed floor elements of the cooling tunnel in the transport direction together forward, but not in common but be moved back separately. Above the floor elements, a high bulk material charge is to form, which fills the entire cooling tunnel cross-section, so that the cooling gas flows through the step-by-step moving bulk material in countercurrent. The bottom elements themselves remain uncooled by the cooling gas, so that the known cooling tunnel would not be suitable to cool from the discharge end of a rotary kiln falling red hot cement clinker. The direct contact of the hot cement clinker with the surface of the floor elements would lead to a high thermal-mechanical wear load and therefore to an insufficient service life of such a cooling tunnel in the case of hot cement clinker. In addition, the juxtaposed bottom elements of such a cooler would not be such a long length of z. B. 40 to 50 m, as they must have large-scale grate cooler for cooling hot cement clinker in terms of throughput and cooling line lengths.

The invention has the object of providing a working according to the "walking-floor" conveying principle bulk material cooler especially for hot cement clinker so that its cooling grate to achieve long lengths and widths of the cooler from a variety of easy and variable mountable ventilated cooling grate modules composable is, in their movement between a Vorhubposi- tion and return stroke even side and / or height offset of the guide elements is kinematically compensated.

This object is achieved according to the invention with a bulk material cooler with the features of claim 1. Advantageous developments of the invention are specified in the subclaims.

When the bulk material cooler according to the invention, the cooling grid over the length and across the width of the radiator is composed of a plurality of modules, wherein the arranged in Kühlguttransportrichtung successively in each case a row of modules are hinged together. The adjacent cooling grid module longitudinal rows are controlled independently of each other between a Vorhubposition in Kühlguttransportrichtung and a Rückhubposition so movable that the goods to be cooled is gradually promoted on the Walking Floor conveying principle on the cooling grid. The composite cooling grate in this way is permeable to the cooling air, which flows through the cooling grid and the bulk material bed mounted thereon in cross-flow from bottom to top, ie the bearing surfaces of the cooling grate modules simultaneously serve as bulk material transport and cooling grate ventilation elements. Above the cooling grate moving in the bulk bed moving elements that would be exposed to high wear and would mix the bed of bulk material are not present. As an example, it is stated that the modules are moved together in their Vorhubbewegung forward, but not moved together in their Rückhubbewegung, but in at least two groups in at least two temporally successive steps are moved back one after the other, in which only a part of the modules, eg. B. in each case only every second row of cooling grid modules seen is moved back across the radiator width. During their return movement, the modules of a row under the resting bulk bed are controlled in such a way that the bed of bulk material remains at rest and does not participate in the return stroke movement.

The modules of a cooling grid module longitudinal row, however, similar to railroad cars, however, be coupled together via a hinge, in which case each module carriage is supported on its own support wheels on corresponding guides.

According to a particular feature of the invention, each Kühlrost- module longitudinal row with the Kühlguttransportrichtung successively arranged coupled modules alternately composed of support rollers supported on support modules and compound modules, which latter are saddled without their own support rollers on the support modules. In other words, with this solution, each type of modular grate module combines two types of modules, all of which have in common that they have on their surface an air-permeable grate that carries the hot item to be cooled.

The coupling between the support modules and the connection modules mounted on both sides takes place via a joint, in particular a ball joint or universal joint. The saddle connection modules can compensate for side and / or height offset of the support modules due to their articulated coupling. Apart from the saving of support rollers and axles in the connection modules while the alignment accuracy is reduced during assembly of the bulk material cooler according to the invention, resulting in a comparatively low total assembly costs. Finally, in the bulk material cooler constructed according to the invention, the amount of the resulting undesired lateral guide forces of the moving support modules is kept small, which is limited by a large axis. distance at the support rollers of the support modules can be further reduced.

The simple assembly of the bulk material cooler according to the invention also results from the fact that both the support modules together with the longitudinally movable base frame supporting them and the connection modules each consist of a unit preassembled in the workshop, these units simply being in the cooling grid or cooling grid be installed at the place of installation of the grate cooler.

The support rollers, on which the base of the support modules is supported, are guided on rails. The support rollers of the support modules may also be so-called combination rollers, which are radially and axially supported and guided in guide rails with U-profile, d. H. equipped with a roller bearing axial guidance. Instead of support rollers or combination rollers, the support modules can also be supported on linear roller bearings or roller conveyors as well as plain bearings or pendulum arms.

The coupling joints of the support modules for the saddle connection modules seen in Kühlguttransportrichtung are advantageously arranged in the region between the front and rear support rollers of the support modules. As a result, the support modules can not be tipped by the load of the coupled saddle connection modules, because the support forces from the connection modules always act between the support rollers of the support modules.

The drive of the support modules for their forward and Rückwärtsbewe- movement is preferably carried out so that the moving module longitudinal rows and their joints are claimed as far as possible only to train. Due to its small lateral executives, the bulk material cooler according to the invention is also advantageously used when pressure is applied to the module longitudinal row. Another advantage of the invention lies in the symmetrical design of the modules. This ensures the similarity of the kinematics during forward and return stroke. The lateral executives are proportionally equal to the tensile and / or compressive forces. The statements on the lateral executives can also be transferred to the vertical support forces. The relieving of the modules to the lifting of a bearing by an uneven vertical module load, which would be possible with a module type on the type of railway cars, is excluded in a combination of support modules with saddle connection modules. A further influence on the wheel loads is the introduction of force of approximately horizontal feed force in the driven modules. To protect the drive elements from dirt and wear, it makes sense to install the drive elements below the module conveyor tracks. Thus, the force application point is well below the friction plane to the abandoned refrigerated goods. This distance creates a moment that leads to uneven loading of the axes of the module carriage or support module. The long center distance reduces this effect. A further reduction of this effect is possible by a tendency of the force application direction. This inclination of the force application direction results in a force component in the vertical direction which achieves a partial to complete compensation of the axle load reduction.

The invention and its further features and advantages will be explained in more detail with reference to the exemplary embodiments schematically illustrated in the figures. It shows:

1 shows schematically the side view of a preferred embodiment of the bulk material cooler according to the invention for cooling hot cement clinker,

2 is a plan view and / or side view of the schematic representation of the kinematics of the bulk material cooler of Figure 1 with side and / or height offset of the Kühlrost- module row,

3 is a schematic enlarged view of a section along the line A-A of FIG. 1 at an articulation point of the cooling grate composed of modules;

4 and FIG. 5: as variants of FIG. 1, a bulk material cooler with specially designed end modules at the beginning and end of the grate cooler,

6 shows a further variant of a bulk material cooler in which the support modules carrying the connection modules are designed to be particularly short and without their own cooling grate.

Fig. 7: enlarged drawn out a combination roller for support and guidance of the support modules of the cooling grate.

1, in the bulk material cooler according to the invention, the cooling grate is made up of a plurality of modules as viewed along the length and across the width of the cooler, wherein the modules arranged one after the other in the refrigerated goods transport direction 10 are interconnected. are coupled. Each cooling grid module longitudinal row, of which a longitudinal row can be seen in FIG. 1, is alternately composed of support modules 13 supported on supporting rollers 1 1, 12 on both sides and of connecting modules 14, which are saddled on the support modules 13 without their own support rollers.

The over the considerable length of the bulk material cooler extending cooling grid module rows are independently controlled between a Vorhubposition 15 in Kühlguttransportrichtung and a Rückhubposition 16 so movable that the goods to be cooled 17, z. B. the hot cement clinker is gradually promoted on the walking floor conveyor principle on the cooling grid from the radiator start to the radiator end. All modules are approximately trough-shaped and they have seen in cross section a the goods to be refrigerated 17 and for the cooling air 18 from bottom to top permeable top, which may be provided with any permeable for the cooling air 18 perforations. With particular advantage, the tops of all modules 13, 14 each consist of spaced mirror-inverted, but offset from each other saddle roof shaped V-profiles whose V-legs mesh with space, the latter a labyrinth for the refrigerated goods and for the cooling air 18 forms. This ensures that the bulk material cooler according to the invention is secured against rust rusting. For even more secure avoidance of the risk of refrigerated goods Rostdurchfalls it is possible to arrange at a distance below the grate surface of all modules 13, 14 a closed the rust diarrhea preventing soil. In the latter case, the cooling grate modules are not chamber-ventilated, but series-ventilated.

The support rollers 11, 12 of the support modules 13 are supported on guide rails 19, 20 of the substructure of the grate cooler. However, in a kinematic reversal, the undersides of the tragic Roll dulet 13 on stationary support rollers. The coupling between the support modules 13 and the connection modules 14 mounted on both sides takes place in each case via a joint 21, 22, preferably a ball joint or universal joint. When mounting the bulk material cooler according to the invention, the required alignment accuracy in the guide rails 19, 20 and support rollers 11, 12 is not particularly high because at a lateral and / or vertical offset of these components, the cooling grid module row of Figure 1, the configuration shown schematically in Figure 2 or kinematics can take.

The enlarged in Figure 3 cut along the line A-A of Figure 1 shows the base of a support module 13, which are supported on the guide rails 20 and 19 via four support rollers, of which the two support rollers 12 can be seen. On their upper side, the support modules 13 on both sides of a universal joint 22 and 21, with which the connection module 14 is saddled on the support module. In this case, prevent lateral guides 23 in the joint plane a transverse inclination of the saddle mounted connection modules 14. That is, the lateral guides 23 are designed so that only the degree of freedom that would allow lateral tilting of the modules is turned off. This can be achieved for example by a spherical shape of the guides and a surface with a low coefficient of friction. These guides also serve to support the weight of the semi-mounted modules. These two functions achieve the static certainty of the construction.

Both the support modules 13 together with the longitudinally displaceable subframe supporting them as well as the connection modules 14 can each consist of a unit preassembled in the workshop, these units being installed in the cooling grate or as cooling grate at the place of installation of the grate cooler with comparatively low assembly costs , Instead of the support rollers 12 shown in Figure 3 and combination rollers can be used, which are radially and axially supported and guided in comparison to Figure 3 by 90 ° tilted guide rails with U-profile, ie the combination rollers have in the axis area own rolling elements for axial guidance of the rollers , In Figure 7, such a combination roller is drawn out enlarged, run the support roller 12 for radial support and the rolling elements 12a at the axis end for axial support in the U-profile 20a.

The coupling joints 21, 22 of the support modules 13 for the saddle mounted connection modules 14 are arranged in Kühlguttransportrichtung respectively in the area between the front and rear support rollers 11 and 12 of the support modules 13, so that the supporting forces from the connection modules 14 always between the support rollers of the support modules 13 act.

The forward and backward movement of the respective adjacent rows of cooling grate modules can be carried out from below the cooling grate by working cylinders, which expediently engage one or more of the support modules 13. Viewed across the width of the grate cooler can be assembled per cooling grate module a plurality of adjacent elongated cooling grate tracks to the preassembled unit, the individual cooling grate tracks independently see between the Vorhubposition and the Rückhubposition are movable.

In Figure 1 it can be seen that the hot to be cooled cement clinker 17, as he falls from the end of a rotary kiln, is first transferred via a static non-moving Vorrost 24 to a reciprocating end piece 25, which by means of hinge on the Front side of the first support module 13 is saddled up. To the last support module 13, an end module 26 may be coupled, via which the cooled cement clinker is fed to a roll crusher 27.

In the exemplary embodiment of FIG. 4, the cooling grid module row has an extended end module 26 mounted on one side. In the embodiment of Figure 5, the first end module 25a is not saddled, but supported as a support module via support rollers on a guide.

In the embodiment of Figure 6, the support modules 13a, 13b, etc. are comparatively short without their own cooling grate formed. The joints 21, 22 of these support elements are relatively close together. The connection modules 14a, 14b saddled on the support elements 13a, 13b, etc., almost directly adjoin one another, ie. H. When viewed in plan view, the cooling grate of the grate cooler of FIG. 6 consists only of the connection modules 14a, 14b which carry the goods to be cooled 17.

The variants illustrated in FIGS. 1, 4, 5 and 6 can be combined with one another as desired.

The upper sides of all the modules carrying the goods to be cooled 17 are formed, for example, in a trough-like manner so as to retain the lowermost bulk material layer in order to prevent relative movement of this lowermost material layer and the respective module top side, which contributes to the autogenous wear protection of all the cooling grate modules 13, 14.

Claims

Bulk cooler for cooling hot chilled goods NSPR

1. bulk material cooler with a refrigerated goods to be cooled (17) such. B. hot cement clinker carrying cooling rack, which transported by a cooling gas (18) refrigerated goods transported from Kühlguteintragsende Kühlgutaustragsende, characterized by the following features: a) the cooling grid is seen over the length and across the width of the cooler of a plurality of modules (13 , 14), wherein the in Kühlguttransportrichtung (10) successively in each case arranged in a row modules (13, 14) are coupled together; b) the coupling of the cooling grid modules (13, 14) of each cooling grid module longitudinal row takes place via a joint (21, 22), c) at least a portion of the cooling grid modules (13, 14) is supported by support rollers (11, 12) supported on guides (19, 20); d) the adjacent cooling grid module longitudinal rows are independently controlled between a Vorhubposition (15) in Kühlguttransportrichtung and a Rückhubposition (16) movable so that the goods to be cooled (17) is gradually promoted on the Walking Floor conveying principle on the cooling grid.

2. bulk material cooler according to claim 1, characterized in that each cooling grid module longitudinal row with the Kühlguttransportrichtung successively arranged coupled modules alternately on support rollers (11, 12) supported support modules (13) and compound modules (14) is composed, the latter without own Support rollers are mounted on the support modules (13).

3. bulk material cooler according to claim 1 or 2, characterized in that both the support modules (13) together with each of them supporting longitudinally displaceable base frame and the connection modules (14) each consist of a preassembled unit, said units in the cooling grid or as Cooling grate can be installed at the place of installation of the grate cooler.

4. bulk material cooler according to claims 2 or 3, characterized in that the support rollers (11, 12) on which the lower frame of the support modules (13) is supported on rails (19, 20) are guided.

5. bulk material cooler according to claim 4, characterized in that the support rollers are combined rollers (12, 12a) which are radially and axially supported and guided in guide rails with U-profile (20a) (Fig. 7).

6. bulk material cooler according to claims 1 or 2, characterized in that the joints (21, 22) between the support modules (13) and the saddle connection modules (14) are ball joints or cardan joints.

7. bulk material cooler according to claims 1, 2 or 6, characterized in that the coupling joints (21, 22) of the support modules (13) for the saddle connection modules (14) in each case in the region between the front and rear support rollers (11, 12 ) of the support modules (13) are arranged.

8. bulk material cooler according to one of claims 1 to 7, characterized in that seen across the width of the cooler each cooling grid module a plurality of juxtaposed elongated cooling rostbahnen are assembled to the preassembled unit whose individual cooling grid paths independently between the Vorhubposition (15) and the return stroke position (16) are movable.

9. bulk material cooler according to claims 1, 2 or 8, characterized in that the drive of the tag modules (13) to their Vorhub and return stroke (15, 16) takes place so that the moving module longitudinal rows and their joints are claimed only to train ,