DE102011055658B3 - Clinker radiator, useful to cool clinker beds, includes units having apertures for injecting cooling media into beds, flues for bed and supports for withdrawing media from bed, where hopper is present between supports as material closure - Google Patents

Abstract

The clinker radiator comprises a first unit (20), which comprises an aperture for injecting a first cooling medium (21) into a clinker bed (52, 53), a first flue for the clinker bed and a first support for withdrawing the first cooling medium from the clinker bed, and a second unit (30), which comprises an aperture for injecting a second cooling medium into the clinker bed, a second flue for the clinker bed and a second support for withdrawing the second cooling medium from the bed. A hopper (40) is arranged between the first and second supports as a material closure for a clinker reservoir. The clinker radiator comprises: a first unit (20), which comprises an aperture for injecting a first cooling medium (21) into a clinker bed (52, 53), a first flue for the clinker bed and a first support for withdrawing the first cooling medium from the clinker bed; and a second unit (30), which comprises an aperture for injecting a second cooling medium into the clinker bed, a second flue for the clinker bed and a second support for withdrawing the second cooling medium from the clinker bed. A hopper (40) is arranged between the first and second supports as a material closure for a clinker reservoir to act against a mixture of the two cooling media. The clinker radiator further comprises: a device for controlling pressure difference between the first and second units, a unit for monitoring volumetric flow of the first and/or second cooling medium injected into the appropriate clinker bed, and a unit for monitoring volumetric flow taken off by the first and/or second flue. The first unit further comprises a first drive to promote the clinker bed put down on the first support, and the second unit further comprises a second drive to promote the clinker bed put down on the second support. The hopper has an intake-side increasing cross-section area, and comprises a discharge outlet with a bed depth displacement. The control device further controls the conveying speed of the clinker bed in the second unit such that the level of the hopper between two reference values is controlled. A crusher and/or a mixture organ are arranged above the hopper for mixing fine-grained and coarse-grained clinker. The hopper has a discharge gap, whose breadth corresponds to the breadth of the second support coating of +- 20%. An independent claim is included for a method of cooling and promoting clinker beds.

Description

Technical area

The invention relates to a clinker cooler according to the preamble of claim 1 and a method according to the preamble of claim 10. In particular, the invention relates to a clinker cooler with a first cooler stage and a second cooler stage, wherein the clinker promoted by the first cooler stage in the direction of the second cooler stage and is cooled with a first cooling medium. In the second cooler stage, the clinker is cooled with a second cooling medium.

State of the art

The production of cement clinker, which is also referred to as clinker, usually takes place in a rotary kiln. At the hot end of the rotary kiln, the clinker is discharged onto a cooling grate of a clinker cooler - in short, a cooler. The clinker lying on the cooling grid is cooled by a gaseous cooling medium, usually air, which is correspondingly strongly heated, at least in the vicinity of the furnace near the radiator. This strongly heated air has a temperature of 750-1300 ° C and is usually supplied to the furnace as a secondary air and / or by a so-called tertiary air duct to a calciner. At the furnace inlet or at the calciner exits the highly heated cooling medium and the heat contained therein is used as process heat, for. B. used for raw meal preheating or for a steam boiler.

DE 24 04 086 B2 shows a three-stage clinker cooler with a first a second and a third heat exchanger. The first heat exchanger is a gas heat exchanger, the second heat exchanger is a liquid heat exchanger and the third heat exchanger is a gas heat exchanger. The clinker is deposited by a rotary kiln on the first heat exchanger, then transferred to a center crusher, at the outlet of the liquid heat exchanger is arranged. The wet clinker is taken from the liquid heat exchanger and deposited on the third heat exchanger, where the clinker is further cooled and dried again. The third heat exchanger is arranged below the first heat exchanger so that the space between the third and the first heat exchanger serves as a wind chamber for the first heat exchanger. This mixes the two cooling media air and water. In addition, cooling air enters through the outlet of the liquid heat exchanger and is withdrawn together with water vapor arising in the liquid heat exchanger.

DE 43 34 901 C2 also discloses a grate cooler. The grate cooler has a first stage on which cement clinker is deposited as a clinker bed. The clinker bed is cooled as usual in the cooler stage by cooling air and transported away by a rotary kiln. At the end of the first cooler stage, the clinker bed is conveyed to an inlet of an intermediate crusher. The intermediate crusher crushes the cement clinker and places it on a second cooling grate. The grate cooler has a trigger, which is arranged at least approximately above the intermediate crusher and therefore draws cooling air from the first and the second cooling stage.

The near-furnace area of the cooler is also referred to as the first cooling stage, or shortly as the first stage. The first stage is followed by a second cooling stage, or shortly second stage, in which the clinker is further cooled by a second cooling medium, usually also air. In this second stage, the clinker is already significantly cooled and the cooling medium is consequently heated less. The heat contained in this cooling medium is usually used as process heat, eg. B. used for drying raw meal. Subsequently, the cooling medium is usually dedusted and usually discharged through a chimney or the like.

Presentation of the invention

The invention is based on the observation that the cooling media are usually deducted over the clinker bed by counteracting fans and so separated. Although there is a so-called neutral point where the pressure gradient across the radiator bed disappears, however, this separation is blurred because the pressure gradient across the clinker bed is very low. Therefore, an uncontrolled mixing of the two cooling media takes place. However, this mixing reduces the maximum achievable temperature of the secondary air or the tertiary air. To improve the separation of the cooling media, lowerable partitions have been proposed on the clinker bed. However, even with these no reliable separation of the coolant is achieved because the partitions must be repeatedly opened during operation, are not tight against the radiator side walls and because the coolant mix in the clinker bed.

The invention has for its object to provide a cooler in which different cooling media used separately and can be removed. The differences can be material or only conditional.

This object is achieved by an apparatus and by a method according to the respective independent claims. Advantageous embodiments of the invention are specified in the subclaims.

The clinker cooler for cooling and conveying a clinker bed has at least a first and a second cooling stage. Each of the two steps has a cooling grid as support for the clinker bed. Through at least one opening in each of the cooling grates, a cooling medium is injected into the clinker bed. Cooling medium leaving the clinker bed is removed via a fume hood. Thus, the clinker cooler has a first stage having a first cooling grate as a first support for the clinker bed with at least one opening for blowing a first cooling medium in the clinker bed and at least a first trigger for discharging the exiting from the clinker bed first cooling medium. The first cooling medium may, for. As air or another gas or gas mixture. In addition, the clinker cooler has a second stage, which has a second cooling grate as a second support for the clinker bed with at least one opening for blowing a second cooling medium in the clinker bed and at least a second trigger for discharging the exiting from the clinker bed second cooling medium. The second cooling medium can, for. B. also be air or another gas or gas mixture. At least one bunker for a clinker reservoir is arranged between the two cooling grates. The first stage feeds clinker into the bunker and the second stage is fed from the bunker. The clinker temporarily stored in the bunker, ie the clinker reservoir, acts as a material closure and reliably prevents mixing of the two coolants, both above the clinker bed and within the clinker bed. The bunker thus serves as a separation between the two cooling media and is preferably filled to a certain height with clinker. This height is also referred to below as level or level. Although at a pressure difference between the inlet and the outlet of the bunker this balancing flow forms, but in the clinker reservoir a large pressure drop takes place, so that practically no exchange of the cooling media takes place through the bunker. The clinker reservoir thus acts as a material closure against a flow through the bunker by the cooling media and thus their mixing. The invention thus makes it possible for the first time a sharp separation of the two cooling media of a clinker cooler. As a result, different cooling media can be inserted and removed separately from one another in the two cooler stages. The differences can be material or even conditional.

This sharp separation increases the achievable secondary or tertiary air temperature. However, this sharp separation also makes it possible for the second cooling medium withdrawn from the second stage above the clinker bed to be fed as the first cooling medium into the first stage without arranging another fan between the second trigger and the first stage and thus the temperature of the second coolant above the clinker bed continue to increase. The second stage then preferably conveys the clinker into a second bunker arranged at its outlet in order to seal the second stage both on the inlet side and outlet side, based on the clinker. Likewise, the first cooling medium, after it z. B. in a calciner part of its heat energy has been returned to the first stage as the first cooling medium to be fed, so that the first coolant is guided in an (open) circuit. It is therefore possible to choose for the first coolant a gas which, unlike air, absorbs heat radiation, ie. H. by heat radiation to molecular vibrations can be excited, for example, carbon dioxide or a carbon dioxide / oxygen mixture. By means of such a coolant, at least a portion of the radiation energy emitted by the initially incandescent clinker can be stored in the coolant and subsequently used again as process heat.

Preferably, the bunker has a discharge gap arranged, for example, in the conveying direction of the first stage, the width of which corresponds at least to the width of the second edition to at least 20%. As a result, the clinker from the bunker can be placed directly on the second edition. An inlet distribution or the like can be omitted. Preferably, the upper limit of the Austragspaltes it is adjustable in height by an adjusting member, for example by at least one pivotable and / or sliding flap or at least one slide. This allows the bed height of the clinker bed in the second stage to be adjusted independently of the bed height in the first stage.

If the discharge gap is arranged on the furnace-facing side of the bunker, the necessary length for the cooler can be reduced. Several arrangements are possible: For example, the second edition can be passed under the bunker and / or or the second edition can be arranged at least approximately below the first stage, so that the second stage one of the conveying direction of the clinker in the first stage opposite conveying direction Has. In another alternative, the discharge gap can be arranged laterally with respect to the conveying direction of the first stage, so that the conveying direction of the second stage is angled with respect to the conveying direction of the first stage.

In the case of an at least approximately horizontal discharge gap of the bunker, the distance between the two gap-limiting edges of the bunker is preferably approximately (± 25%) equal to three times the diameter of the largest clinker grains. As a result, bridging over the discharge gap can be avoided simply and reliably.

Preferably, at least one crusher for crushing clinker is arranged above the bunker. For example, a roll crusher with, for example, two or four rolls rotating in pairs against one another can be arranged in the inlet region of the bunker. Thereby, the amount of heat recovered in the second stage can be increased.

Particularly preferred is in the inlet region of the bunker, z. B. below the optional crusher, arranged at least one mixing element for mixing fine-grained and coarse-grained clinker, so that the fine-grained clinker is deposited between the coarse-grained clinker in the bunker to at least partially fill the spaces between larger clinker particles by fine-grained clinker and thus seal. As a result, the blocking effect of the clinker reservoir is increased. As a mixing element, for example, at least one rotating roller may be provided. For example, in the inlet region of the bunker, a roll crusher with four or more rollers rotating in pairs against each other may be arranged. The axes of the rolls may, for example, be at least approximately (± 30 °) parallel to one another and / or to the inlet edge of the bunker. The first pair of rollers on the furnace side forms a first crushing gap and the pair of rollers disposed downstream in the conveying direction forms a second crushing gap. At least one centrifugal roller is preferably arranged at least below the first crushing gap in order to spin fine fraction of the clinker, ie fine-grained clinker, falling through the first gap in the direction of the clinker falling out of the second gap. As a result, the fine fraction can be stored evenly between the coarser clinker particles. Such a centrifugal roller also conveys coarser clinker, which falls through the first gap in the bunker, in the direction of falling through the second gap clinker, so that a homogeneous mixture of the clinker particles is achieved.

Preferably, the clinker cooler has at least one control element for changing the pressure difference between the first and the second cooling medium. This makes it possible to set the pressure of the first cooling medium at the inlet of the bunker slightly greater than the pressure of the second cooling medium at the outlet of the bunker. This ensures that the second cooling medium can not get into the first stage.

Preferably, the clinker cooler has means for monitoring the volume flow of the injected into the clinker bed first cooling medium and means for monitoring the withdrawn through the first withdrawal volume flow. If these volume flows are the same size, or the withdrawn volume flow is slightly smaller than the injected volume flow, then it is ensured that the first cooling medium is not contaminated by the second cooling medium and thus cooled. The monitoring makes it possible to regulate the volume flows accordingly. Alternatively or additionally, it is also possible to provide means for monitoring the volume flow of the second cooling medium blown into the clinker bed, and means for monitoring the volume flow withdrawn through the second outlet. It would then be preferable to ensure, by means of a control element, that the volume flow of the second cooling medium blown into the clinker bed is smaller than or equal to the volume flow withdrawn through the second outlet.

The first and second stages preferably have separate drives for conveying the clinker bed deposited on the first or second support from the furnace in the direction of a radiator outlet. Consequently, the first stage preferably has a first drive and the second stage has a second drive. This separation of the drives allows the conveyed clinker amount per unit time in the two stages to regulate independently and thereby, for example, to keep the level of the clinker in the bunker between two setpoints. If the actual value of the fill level rises above the upper setpoint, for example, the second drive can be accelerated. Thus, the clinker cooler preferably has a control element for controlling the conveying speed of the clinker in the first and / or second stage, which controls the conveying speed of the clinker in the first and / or second stage such that the level of the bunker does not fall below a given value. The measurement of the actual value can z. B. by rotating or capacitive level sensors, a distance radar, a weighing of the bunker or a measurement of the pressure drop in the bunker.

Preferably, the cross-sectional area of the bunker tapers or widens in the direction of the second stage. As the cross-section expands, the formation of bridges that can obstruct slipping of clinker is largely precluded. If the cross-section narrows, then the effective length of the reservoir, that is to say the fill level, increases faster when starting the clinker cooler, and a mixing of the two cooling media is prevented particularly quickly. In addition, when the second cooling medium flows into the bunker, a pressure drop takes place, which slows the inflow. Another advantage of a downwardly tapering bunker is that the space required for the clinker cooler decreases.

Preferably, the lower rear end of the outlet of the bunker is disposed over the support of the second stage and preferably angled in an L-shape, the free leg facing in the direction of the radiator outlet. As a result, the bunker and the second stage can be mechanically decoupled, without any fear that clinker wedged between the wall of the bunker and the second stage.

The second stage can be arranged below the first stage, thereby the second cooling medium emerging from the clinker bed can be fed in a short path as the first cooling medium into the first stage. For example, the clinker bed can be conveyed in the second stage opposite to the conveying direction of the first stage.

Preferably, the bunker has on the outlet side an adjusting member for varying the cross-sectional area of the outlet of the bunker. As a result, the outlet-side free gap of the bunker can be minimized, thereby adjusting the bed height on the second cooling stage. The adjustment thus allows a bed height adjustment and can be referred to as such.

Preferably, at least one crusher is arranged between the two stages and in series with the bunker, for example a roll crusher. As a result, the amount of heat to be extracted from the clinker can be increased because, in particular, larger clinker drys usually have a significantly higher core temperature compared to their surface temperature. The crusher should have its own coolant to increase its stability, whereby the heat extracted from the crusher and thus the clinker is preferably further used as process heat. Particularly in the case of a bunker tapering in the outlet direction, the crusher is preferably arranged in front of the bunker, so that the first stage transfers the clinker to the crusher and the clinker then falls from the crusher into the bunker, which then deposits the broken clinker on the second support. As a result, the maximum grain size of the clinker in the bunker is known and it is impossible that large Klinkerbrocken clog or damage the bunker.

In the method for cooling clinker, the clinker is first cooled by blowing in a first cooling medium. For this purpose, the first cooling medium is blown through a first cooling grate, that is, through at least one opening in a first support for a clinker bed in this. The first cooling medium leaving the clinker bed is drawn off through a first draw. It does not matter where compressors for blowing and / or removing the first cooling medium are arranged. The two terms express only that a pressure drop of the cooling medium takes place in the clinker bed. From the first stage clinker is preferably continuously fed into the inlet of a bunker. In the bunker thus a clinker reservoir is kept, which acts as a material closure between the first stage and a bunker downstream second stage. From the bunker the clinker is handed over to a second stage, z. B. on a second edition, so on a second cooling grate stored. In the second stage, the clinker is further cooled by injecting a second cooling medium into the clinker bed deposited on the second support. The emerging from the clinker bed second cooling medium is withdrawn through a second trigger. In the described method, the bunker or the clinker reservoir held therein serves as a separation between the two cooling media. If the removal of the cooling media takes place in such a way that the location at which the pressure gradient disappears, ie the so-called neutral point, in or in front of the bunker, it is ensured that the second cooling medium does not contaminate the first cooling medium. Due to the high pressure drop in the clinker bed, the neutral point can be localized very tightly.

The clinker is preferably broken with a crusher arranged in front of the bunker in order to increase the amount of heat transferred in the clinker cooler to the second cooling medium

Preferably, the fine fraction of the clinker is mixed with coarser clinker particles, z. B. by a arranged below a crusher centrifugal roller.

Preferably, the level of the bunker is monitored and falls below a given value, which corresponds to a minimum level, for example, the amount removed at the outlet of the bunker per unit time is reduced. In a reciprocal manner, a backwater in the bunker, so exceeding a given maximum level can be resolved.

The terms in front of and behind refer to the conveying direction of the clinker, which is conveyed from a cooler inlet arranged under the furnace outlet to a cooler outlet and thereby cooled.

By the invention, any fluids or fluid mixtures for cooling clinker, so any coolant, run separately. The first and the second coolant may be identical or different. The invention has been explained with reference to a two-stage clinker cooler, of course, the invention can also be implemented in three - or multi-stage clinker cooler.

Description of the drawings

The invention will now be described by way of example without limitation of the general inventive idea by means of embodiments with reference to the drawings.

1 shows a clinker cooler,

2 shows a variant of the clinker cooler

3 shows a further variant of the clinker cooler

4 shows a further variant of the clinker cooler

The clinker cooler in 1 closes at the end of a rotary kiln 5 for clinker production and has a first stage 20 and a subordinate level 30 , Between the two stages 20 . 30 is a bunker 40 arranged. The first stage 20 has a first edition 23 as the first cooling grid, out of the oven 5 Exiting clinker via an only indicated inlet distribution as a clinker bed 52 is filed. To cool the clinker is a first cooling medium 21 through openings (not shown) in the support 23 in the clinker bed 52 blown. On the top of the clinker bed 52 enters the first cooling medium 21 strongly warmed up again and gets through a first trigger 22 as well as through the oven 5 deducted. The first deduction 22 For example, a calciner with the highly heated first cooling medium 21 Food. While the clinker bed 52 is cooled, it is transported by a conveyor drive (not shown) in the direction of the bunker. For this purpose, the first edition, for example, as a cooling grid after the DE 10 2007 019 530 or the DE 101 18 440 be designed.

The second stage 30 has a second cooling grate as a second edition 33 through which a second cooling medium 31 in the second edition 33 discarded clinker bed 53 blown. Above the clinker bed 53 becomes the second cooling medium 31 through a second deduction 32 deducted. Also the second edition 33 is designed as a conveyor grate and thus promotes the clinker from the outlet of the bunker 40 to the radiator outlet 12 where the clinker z. B. by a crusher (not shown) can be further processed.

Between the first stage 20 and the second stage 30 is a bunker 40 arranged. The bunker 40 has a preferred over the entire width of the first stage 20 extending enema 41 in the first stage 20 promotes the clinker. Thus Klinker falls from the first edition 23 in the bunker 40 and slides down or down in it until it's on a second edition 33 the second stage 30 rests. It forms in the bunker 40 a clinker reservoir 54 with a level 42 out. The level 42 is the height at which the clinker reservoir crosses the bunker 40 completely filled out. If between the first stage 20 and the second stage 30 there is a pressure difference, this pressure difference falls in the clinker reservoir 54 strong, that is, if ever, mix the two cooling media 21 . 31 only minimal. To prevent the second cooling medium 31 through the first trigger 22 or the oven 5 is withdrawn, is the pressure of the first cooling medium 21 above the clinker bed 52 on the first edition 23 preferably greater than or equal to the pressure of the second cooling medium 31 above the clinker bed 53 on the second edition 33 , The section of the second edition 33 on which the clinker reservoir 54 rests with the reference numeral 34 characterized. In this section 34 is preferred over the rest of the second edition 33 injected reduced volume flow per support surface to the risk that the second cooling medium 31 in the first stage 20 gets to further reduce.

In this example, the bunker 40 shaft-like, ie the inlet 41 and outlet have at least approximately the same cross section and are superimposed. The bunker 40 has a discharge gap arranged in the conveying direction, the free height of which is indicated by a bed height adjustment indicated here as a slide 43 Adjustable bar is to the height of the clinker bed 53 on the second edition 33 adjust. Should the height of the clinker bed 53 can be increased, this can be the distance between the second edition 33 and the bottom edge of the bed height adjustment 43 be enlarged. For example, the bed height adjustment 43 be moved upward, which is indicated by a double arrow. To reduce the height of the second clinker bed 53 becomes the bed height adjustment 43 in the direction of the second edition 33 emotional. The bed height adjustment 43 can (unlike shown) synonymous with the in the 2 to 4 variants are realized.

The level 42 of the clinker reservoir 54 is monitored by at least one sensor, not shown. If the actual value of the level rises 42 above a maximum setpoint or drops below a minimum setpoint, then by a corresponding control of the drives for conveying the clinker bed 52 . 53 on the first edition 23 and / or the second edition 33 the difference of the vectors 25 . 35 adapted to respective conveyor speeds. For example, the second conveying speed 35 be reduced when the level 42 falls below a minimum set point and vice versa.

The clinker cooler 10 in 2 essentially corresponds to the clinker cooler 10 in 1 , It differs in that the bunker is retracted across its width, ie in the indicated longitudinal section of the radiator 1 tapers downwards. For example, the outlet of the bunker can be tapered to a width that corresponds at least approximately (± 25%) to three times the maximum clinker grain diameter. For example, if the maximum diameter of the clinker grains is 60 mm, then the distance between the edges of the outlet gap is Bunkers, so the width of the discharge slot preferably at least in about 180 mm (± 25%). The rear end of the spout of the bunker 40 can over the second edition 33 the second stage 30 be arranged. Preferably, it is angled in an L-shape, with the free leg pointing in the direction of the radiator outlet. This allows the bunker 40 and the second stage 20 be mechanically decoupled, without the fear that clinker wedged between the wall of the bunker and the second stage. This detail of the L-shaped bend is not shown in the other figures, but can also be realized in the embodiments shown there. In the example shown, the first stage empties 20 unhindered in a crusher 60 , and this unhindered in the bunker 40 , The level of the bunker 40 is about the second conveying speed 35 that is the second stage 30 regulated. This is the level 43 monitored and depending on the level 43 and / or its change becomes the second conveying speed 35 regulated. The level drops 43 below a target value is the second conveying speed 35 reduced, the level increases 43 via another setpoint, the second conveyor speed 35 elevated.

Because the bunker 40 is tapered funnel-shaped, is not or only slightly by the cooling medium "ventilated" area 34 correspondingly small. In addition, the "blocking effect" of the clinker reservoir is increased. The total length of the radiator 1 can be reduced accordingly compared to the other examples.

In the inlet area of the bunker 40 is a roll crusher 40 by way of example four at least approximately (± 30 °) parallel to each other arranged rollers, which are driven in pairs in opposite directions. The axes of the rollers are aligned at least approximately (± 30 °) parallel to the inlet edge of the bunker, so that a large part of the fine fraction of the clinker through the inlet edge side first gap between the rollers 60 falls into the bunker. Therefore, a mixing element is arranged below the first gap, the example as a centrifugal roller 61 is shown. The mixing organ 61 transported by the first gap fallen clinker in the direction of the fallen through the second gap clinker. As a result, the fine fraction of the clinker is incorporated comparatively homogeneously between the larger clinker particles and the blocking effect of the clinker reservoir 54 elevated. Incidentally, the description of the 1 also on the 2 read.

The clinker cooler 10 in 3 has essentially the same structure as the clinker cooler in 1 , Notwithstanding the example according to 1 has the bunker 40 the shape of a sloping shaft. At the inlet 41 the bunker 40 can be an adjusting 46 be arranged, which allows the inlet gap to increase or decrease and thus the free cross section of the inlet of the size of the clinker particles and / or the conveying speed of the clinker bed 52 adapt. Here is the adjusting simplified as a hinged cover shown. In another preferred embodiment, the adjusting member is a displaceable plate, which is preferably arranged ascending in the conveying direction. Such an adjustment can also with the bunkers after the 1 . 2 or 4 be provided.

The clinker cooler in 4 corresponds in its basic structure to the clinker cooler in the 1 to 3 , Unlike in the 1 and 3 is above the bunker 40 a roll crusher 60 arranged for crushing clinker. The roll crusher 60 is here only by two rolls 61 indicated. Unlike shown, more than two rollers can be provided. The rotational speed of the rollers 61 is preferably infinitely variable, so that the level 42 by changing the rotational speed of the rollers 61 can be changed. Other than shown, the bunkers in the 1 and or 3 a breaker 60 , such as in the 2 and 4 shown have. A mixed organ that lives in 2 as a centrifugal roller 61 can also be seen in the in the 1 . 3 and 4 shown embodiments may be provided.

LIST OF REFERENCE NUMBERS

5

oven

6

flame

10

clinker cooler

12

Cooler outlet

20

first stage

21

first cooling medium

22

first deduction

23

Pad / cooling grate

25

first conveying speed

30

second step

31

second cooling medium

32

second deduction

33

second edition / cooling grate

34

Section of the second edition

35

second conveying speed

40

bunker

41

enema

42

level

43

Bed height adjustment

46

adjusting

52

clinker bed

53

clinker bed

54

clinker reservoir

60

breaker

61

roller

62

Mixing device / spinner roll

Claims (14)

Clinker cooler ( 10 ) for cooling and conveying a clinker bed ( 52 ) and a clinker bed ( 53 ), with at least - a first stage ( 20 ), which is a first edition ( 23 ) for the clinker bed ( 52 ) with at least one opening for injecting a first cooling medium ( 21 ) in the clinker bed ( 52 ) and at least a first deduction ( 22 ) for discharging the from the clinker bed ( 52 ) exiting first cooling medium ( 21 ), - a second stage ( 30 ), which is a second edition ( 33 ) for the clinker bed ( 53 ) with at least one opening for injecting a second cooling medium ( 31 ) in the clinker bed ( 53 ) and at least one second deduction ( 32 ) for discharging the from the clinker bed ( 53 ) exiting second cooling medium ( 31 ), characterized in that between the first edition ( 23 ) and the second edition ( 33 ) a bunker ( 40 ) for a clinker reservoir ( 54 ) is arranged as a material closure to counteract mixing of the two cooling media. Clinker cooler ( 10 ) according to claim 1, characterized in that, the clinker cooler ( 10 ) at least one control element for changing a pressure difference between the first stage ( 20 ) and the second stage ( 30 ) having. Clinker cooler ( 10 ) according to one of the preceding claims, characterized in that the clinker cooler ( 10 ) Means for monitoring the volume flow of the into the corresponding clinker bed ( 52 . 53 ) injected first and / or second cooling medium ( 21 . 31 ) and means for monitoring the first and / or second deduction ( 22 . 32 ) has withdrawn volume flow. Clinker cooler ( 10 ) according to one of the preceding claims, characterized in that the first stage ( 20 ) a drive to the fjord of the first edition ( 23 ) deposited clinker beds ( 52 ) and that the second stage ( 20 . 30 ) a separate drive to the fjord of the second edition ( 33 ) deposited clinker beds ( 53 ) Has. Clinker cooler ( 10 ) according to one of the preceding claims, characterized in that the bunker ( 40 ) has an inlet side enlarging cross-sectional area. Clinker cooler ( 10 ) according to one of the preceding claims, characterized in that the bunker ( 40 ) a discharge opening with a bed height adjustment ( 43 ) Has. Clinker cooler ( 10 ) according to one of the preceding claims, characterized in that a control element for regulating the conveying speed of the clinker bed ( 53 ) in the second stage ( 30 ) is provided which the conveying speed ( 35 ) of the clinker bed ( 53 ) in the second stage ( 30 ) such that the level ( 42 ) of the bunker ( 40 ) between two setpoints. Clinker cooler ( 10 ) according to one of the preceding claims, characterized in that above the bunker at least one crusher and / or a mixing element ( 61 ) is arranged for mixing fine-grained and coarse-grained clinker. Clinker cooler according to one of the preceding claims, characterized in that the bunker ( 40 ) has a Austragspalt whose width of the width of the second edition ( 33 ) corresponds to at least ± 20%. Method for cooling clinker comprising at least the steps: - cooling of clinker by blowing a first cooling medium ( 21 ) in a clinker bed ( 52 ) on a first edition ( 23 ) a first stage ( 20 ) of a clinker cooler ( 10 ) and removing the first cooling medium ( 21 ) on a first deduction ( 22 ), - transfer of clinker to a second stage ( 30 ) of the clinker cooler ( 10 ), - cooling of clinker by blowing in a second cooling medium ( 31 ) in a clinker bed ( 53 ) on a second edition ( 33 ) a second stage ( 30 ) of a clinker cooler ( 10 ) and removing the second cooling medium ( 31 ) via a second deduction ( 32 ), characterized in that the clinker from the first edition ( 23 ) in a bunker ( 40 ), to create a clinker reservoir ( 54 ) vorzuhalten as a material closure to counteract a mixing of the two cooling media, wherein from the clinker reservoir of the clinker on the second edition ( 33 ) is stored. A method according to claim 10, characterized in that the removal of the cooling media ( 21 . 31 ) such that the location at which a pressure gradient between the first stage ( 20 ) and the second stage ( 30 ) disappears in or in front of the bunker ( 40 ). A method according to claim 10 or 11, characterized in that the bed height of the on the second edition ( 33 ) deposited clinker by a bed height adjustment ( 43 ) is set. Method according to one of claims 10 to 12, characterized in that the clinker with a above the bunker ( 40 ) arranged crushers ( 60 ) is broken. Method according to one of claims 10 to 13, characterized in that the level ( 42 ) of the bunker ( 40 ) is monitored and Falling below and / or exceeding given setpoints, the conveying speed ( 35 ), with which the clinker on the second edition ( 33 ) is conveyed towards the radiator outlet, reduced or increased.

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