Device for conveying fuels into a gasification reactor

Abstract

A device for conveying fuels into a gasification reactor includes a bulk material container, a conveying pipe, into which a discharge of the bulk material container opens and which can be connected to a lateral infeed opening of the gasification reactor, and a mechanical conveying apparatus disposed in the conveying pipe, the conveying apparatus is formed by a hydraulically drivable plunger, which is movably guided in a first, cylindrical section of the conveying pipe, and in that the conveying pipe has an internal cross-section which decreases continuously in the conveying direction of the fuel in order to form a compacting cone in a second section.

1 . A device for conveying fuels into a gasification reactor that has a lateral infeed opening, comprising
 a bulk material container,   a conveying pipe, into which a discharge of the bulk material container opens and which can be connected to said lateral infeed opening, said conveying pipe having a first cylindrical section, and   a mechanical conveying apparatus disposed in the conveying pipe,   wherein the conveying apparatus is formed by a hydraulically drivable plunger, which is movably guided in said first, cylindrical section of the conveying pipe, and said conveying pipe having an internal cross-section, which decreases continuously in the conveying direction of the fuel to thereby form a compacting cone in a second conveying pipe section.   
     
     
         2 . The device according to  claim 1 , wherein said device further includes having said second conveying pipe section comprising the compacting cone connected to said infeed opening of the gasification reactor. 
     
     
         3 . The device according to  claim 1 , wherein said second conveying pipe section comprising the compacting cone is configured as a separate exchangeable pipe portion. 
     
     
         4 . The device according to  claim 1 , wherein said device further comprises a fitting, and the second conveying pipe section comprising the compacting cone is connected to the infeed opening of the gasification reactor by interposing said fitting. 
     
     
         5 . The device according to  claim 3 , wherein said device further comprises an adapter and the pipe portion forming the first cylindrical section and the second exchangeable pipe portion are interconnected via said adapter forming an intermediate section of the conveying pipe, wherein the adapter can be removed from the conveying pipe in the radial direction. 
     
     
         6 . The device according to  claim 1 , wherein the plunger completely blocks off the ingress of fuel into the conveying pipe after the plunger has completed its maximum working stroke in the conveying direction. 
     
     
         7 . The device according to  claim 1 , wherein said device for conveying fuels includes, end section adjacent to the infeed opening, a cooling device including a cooling jacket, wherein the cooling jacket surrounds at least the conveying pipe section formed with the compacting cone. 
     
     
         8 . The device according to  claim 1 , wherein the first conveying pipe section further comprises a shut-off valve, which can be displaced perpendicularly to the conveying direction. 
     
     
         9 . The device according to  claim 1 , wherein the conveying pipe further comprises an inert gas connection. 
     
     
         10 . The device according to  claim 1 , wherein the plunger has a front face, formed on a part of the plunger which can be extended in the conveying direction. 
     
     
         11 . The device according to  claim 1 , wherein the bulk material container comprises a discharge hopper having a front wall, wherein the front wall of the discharge hopper as seen in the direction of conveying encloses an angle of 0-20° with a normal to the conveying pipe axis. 
     
     
         12 . The device according to  claim 11 , wherein the discharge hopper has a rear wall, wherein the rear wall of the discharge hopper as seen in the conveying direction encloses an angle of 10-40° with a normal to the conveying pipe axis. 
     
     
         13 . The device according to  claim 11 , wherein said device further comprises an disaggregation device, wherein the disaggregation device is provided for the fuel in the region of the discharge opening of the discharge hopper, said disaggregation device comprising a plurality of air injection openings distributed over the circumference. 
     
     
         14 . The device according to  claim 1 , wherein the axis of the conveying pipe is inclined downwards, wherein the angle of inclination measured with respect to the horizontal is in the range of 5° to 30°. 
     
     
         15 . The device according to  claim 7 , wherein a cooling fluid inlet and a cooling fluid outlet are connected to the cooling jacket, wherein a temperature sensor is provided to measure the temperature of the cooling fluid withdrawn from the cooling jacket via the cooling fluid outlet, and its measured values are fed to a control device, which cooperates with the drive of a cooling fluid circulating pump in order to control the rate per time unit, at which the cooling fluid is conveyed as a function of the measured cooling fluid temperature. 
     
     
         16 . A gasification device comprising a gasification zone to accommodate a stationary bed and a combustion zone to accommodate a fluidized bed, wherein the gasification zone and the combustion zone, to allow circulation of the bed material, are interconnected at two locations by means of a sluice-like apparatus in each case, such as a constriction or a siphon, wherein the gasification zone comprises an infeed opening to supply combustible material, a gas exhaust and a nozzle bottom for injecting in particular steam or CO 2 , and the combustion zone comprises an air infeed for fluidizing the bed material entering the combustion zone from the gasification zone, wherein a conveying device according to  claim 1  is connected to the infeed opening, wherein, the conveying device is disposed so as to convey fuel into or onto the stationary bed.