Conveyor device for combustion boilers

Abstract

A device, which conveys and handles material from a combustion boiler, includes at least one conveyor belt and a housing surrounding the conveyor belt. The conveyor belt includes at least one horizontal collection area and a handling area. The housing includes at least one outlet for the material. Furthermore, the handling area has a first length of at least 10 m and an inclination of at least 38°. Some arrangements relate to a corresponding combustion plant and to a method for handling hot ash.

1 . A device for conveying and treating material from a combustion boiler, having at least one conveyor belt and a housing surrounding the conveyor belt, wherein the conveyor belt has at least one horizontal collecting region and a treatment region, and the housing has at least one outlet for the material, and furthermore the treatment region has a first length of at least 10 m and a slope of at least 38°. 
     
     
         2 . The device according to  claim 1 , wherein the treatment region is arranged at a maximum distance of 5 m from the end of the collecting region. 
     
     
         3 . The device according to  claim 1 , wherein the collecting region and the treatment region are connected via a deflecting region, wherein the housing forms a reservoir for material in the deflecting region above the conveyor belt. 
     
     
         4 . The device according to  claim 1 , wherein the conveyor belt is embodied with at least one of the following properties:
 a width of the conveyor belt of at least 0.8 m,   webs running along the width and having a web height of at most 200 mm,   webs which are arranged along the extent of the conveyor belt at a distance apart of at least 0.65 m and which run along the width.   
     
     
         5 . The device according to  claim 1 , wherein an air supply for an air flow toward the treatment region of the device is provided in the region of the at least one outlet. 
     
     
         6 . The device according to  claim 1 , wherein cross members are arranged below the conveyor belt in the horizontal collecting region of the conveyor belt. 
     
     
         7 . The device according to  claim 1 , wherein the conveyor belt is connected to a chain drive. 
     
     
         8 . The device according to  claim 1 , wherein the treatment region of the device has various slopes. 
     
     
         9 . A plant comprising at least one combustion boiler, having at least one bottom opening for delivering material, and at least one device for conveying and treating material from a combustion boiler, each device having at least one conveyor belt and a housing surrounding the conveyor belt, wherein the conveyor belt has at least one horizontal collecting region and a treatment region, and the housing has at least one outlet for the material, and furthermore the treatment region has a first length of at least 10 m and a slope of at least 38°, and wherein the collecting region is arranged below the at least one bottom opening, and at least one silo for the material is provided below the outlet. 
     
     
         10 . The plant according to  claim 9 , wherein at least one comminutor for the material is provided between the outlet of the housing and the at least one silo. 
     
     
         11 . The plant according to  claim 9 , wherein data acquisition means are provided at least in the combustion boiler or in the device, said data acquisition means being connected to a controller which is connected to a drive of the conveyor belt. 
     
     
         12 . A method for conveying and treating hot ash of a combustion boiler, comprising at least the following steps:
 a) delivery of the hot ash from a combustion boiler onto a horizontal collecting region of a conveyor belt arranged in a housing, such that the ash is transported with varying dwell time in the collecting region,   b) rearranging the hot ash, such that at least some of the ash is held back with a shorter dwell time in the collecting region,   c) transporting the ash in an inclined treatment region having a first length of at least 10 m and having a slope of at least 38°, an opposed air flow for cooling the ash being generated, and   d) discharging the ash from the housing.   
     
     
         13 . The method according to  claim 12 , wherein the hot ash is portioned at least during step b) or c). 
     
     
         14 . The method according to  claim 12 , wherein the comminuting of the ash and the storing of the ash in a silo directly follow step d). 
     
     
         15 . The method according to  claim 12 , wherein the speed of the conveyor belt is varied during the operation of the combustion boiler.