Device for cooling a pourable or liquid product

Abstract

The invention relates to a device for cooling a pourable or flowable product, with a vessel 1 for receiving and conveying the pourable or flowable product and a plurality of cooling zones 13 a , 13 b , 13 c , which are formed along the vessel 1 in the conveying direction of the pourable or flowable product. According to the invention, the cooling zones 13 a , 13 b , 13 c are designed such that they can be supplied with a respective cooling medium 15 a , 15 b , 15 c independently of one another. The device also comprises a control means for controlling the cooling power of the individual cooling zones 13 a , 13 b , 13 c independently of one another.

1 . Device for cooling a pourable or flowable product, with: a vessel ( 1 ) for receiving and conveying the pourable or flowable product; and
 a plurality of cooling zones ( 13   a ,  13   b ,  13   c ), which are formed along the vessel ( 1 ) in the conveying direction of the pourable or flowable product, characterized in that at least two cooling zones ( 13   a ,  13   b ,  13   c ) are designed for being supplied with a respective cooling medium ( 15   a ,  15   b ,  15   c ) independently of one another, the device also having a control means for controlling the cooling power of the individual cooling zones ( 13   a ,  13   b ,  13   c ).   
     
     
         2 . Device according to  claim 1 , characterized in that the vessel ( 1 ) is a rotary drum with an internal spiral ( 3 ). 
     
     
         3 . Device according to  claim 2 , characterized in that the rotary drum ( 1 ) is of a double-walled configuration, and the cooling zones ( 13   a ,  13   b ,  13   c ) are respective separate wall sections, which are formed for conducting the respective cooling medium ( 15   a ,  15   b ,  15   c ) in the separate wall sections. 
     
     
         4 . Device according to  claim 2 , characterized in that the control means is designed for controlling at least one of the following parameters for at least one cooling zone by open-loop or closed-loop control:
 the temperature of the supplied cooling medium,   the temperature of the discharged cooling medium,   the temperature of the pourable or flowable product leaving the cooling zone ( 13   a ,  13   b ,  13   c ),   the flow rate of the cooling medium ( 15   a ,  15   b ,  15   c ),   the pressure of the cooling medium ( 15   a ,  15   b ,  15   c ),   the rotational speed of the rotary drum,   the speed of the pourable or flowable product and/or   the throughput of the pourable or flowable product.   
     
     
         5 . Device according to  claim 4 , characterized in that the cooling medium of at least one cooling zone ( 13   a ) is thermal oil and the cooling medium of another cooling zone ( 13   b ,  13   c ) is water. 
     
     
         6 . Device according to  claim 4 , characterized by a closed circuit for at least one of the cooling media ( 15 ) of a cooling zone ( 13   a ,  13   b ,  13   c ) and with a heat exchanger for recovering the heat. 
     
     
         7 . Device according to  claim 6 , characterized in that the device has a plurality of sensors in order to measure for at least one cooling zone ( 13   a ,  13   b ,  13   c ) the temperature of the supplied cooling medium, the temperature of the supplied cooling medium, the temperature of the discharged cooling medium, the temperature of the pourable or flowable product leaving the cooling zone ( 13   a ,  13   b ,  13   c ), the flow rate of the cooling medium ( 15   a ,  15   b ,  15   c ), the pressure of the cooling medium ( 15   a ,  15   b ,  15   c ), the rotational speed of the rotary drum, the speed of the pourable or flowable product and/or the throughput of the pourable or flowable product. 
     
     
         8 . Device according to  claim 6 , characterized in that the device has a plurality of final control elements in order to influence for at least one cooling zone ( 13   a ,  13   b ,  13   c ) the temperature of the supplied cooling medium, the temperature of the discharged cooling medium, the temperature of the pourable or flowable product leaving the cooling zone ( 13   a ,  13   b ,  13   c ), the flow rate of the cooling medium ( 15   a ,  15   b ,  15   c ), the pressure of the cooling medium, ( 15   a ,  15   b ,  15   c ), the rotational speed of the rotary drum, the speed of the pourable or flowable product and/or the throughput of the pourable or flowable product. 
     
     
         9 . Method for producing a ferrite, characterized by the steps of:
 calcining the starting materials in a rotary kiln to produce granules; and   cooling the granules by means of a device for cooling a pourable or flowable product.   
     
     
         10 . Device according to  claim 3 , characterized in that the control means is designed for controlling at least one of the following parameters for at least one cooling zone by open-loop or closed-loop control:
 the temperature of the supplied cooling medium,   the temperature of the discharged cooling medium,   the temperature of the pourable or flowable product leaving the cooling zone ( 13   a ,  13   b ,  13   c ),   the flow rate of the cooling medium ( 15   a ,  15   b ,  15   c ),   the pressure of the cooling medium ( 15   a ,  15   b ,  15   c ),   the rotational speed of the rotary drum,   the speed of the pourable or flowable product and/or   the throughput of the pourable or flowable product.   
     
     
         11 . Device according to  claim 2 , characterized in that the cooling medium of at least one cooling zone ( 13   a ) is thermal oil and the cooling medium of another cooling zone ( 13   b ,  13   c ) is water. 
     
     
         12 . Device according to  claim 3 , characterized in that the cooling medium of at least one cooling zone ( 13   a ) is thermal oil and the cooling medium of another cooling zone ( 13   b ,  13   c ) is water. 
     
     
         13 . Device according to  claim 2 , characterized by a closed circuit for at least one of the cooling media ( 15 ) of a cooling zone ( 13   a ,  13   b ,  13   c ) and with a heat exchanger for recovering the heat. 
     
     
         14 . Device according to  claim 3 , characterized by a closed circuit for at least one of the cooling media ( 15 ) of a cooling zone ( 13   a ,  13   b ,  13   c ) and with a heat exchanger for recovering the heat. 
     
     
         15 . Device according to  claim 5 , characterized by a closed circuit for at least one of the cooling media ( 15 ) of a cooling zone ( 13   a ,  13   b ,  13   c ) and with a heat exchanger for recovering the heat. 
     
     
         16 . Device according to  claim 7 , characterized in that the device has a plurality of final control elements in order to influence for at least one cooling zone ( 13   a ,  13   b ,  13   c ) the temperature of the supplied cooling medium, the temperature of the discharged cooling medium, the temperature of the pourable or flowable product leaving the cooling zone ( 13   a ,  13   b ,  13   c ), the flow rate of the cooling medium ( 15   a ,  15   b ,  15   c ), the pressure of the cooling medium, ( 15   a ,  15   b ,  15   c ), the rotational speed of the rotary drum, the speed of the pourable or flowable product and/or the throughput of the pourable or flowable product.