Homogenized Feeding of Pulverized fuel with a controllable restriction in the pulverized fuel feed line

Abstract

An apparatus for constantly supplying pulverized fuel at ambient or increased pressure includes a restrictable pulverized fuel control valve in the pulverized fuel feed line connecting the swirl layer of a dispensing vessel with a pulverized fuel collector is provided. This pulverized fuel control valve effects a compensation for and also attenuation of the pressure fluctuations, as occur in the pulverized fuel feed line, particularly during refill processes of the dispensing vessel. Special embodiments relate to a further homogenization by a fixed throttle facility and also auxiliary gas feeds into the pulverized fuel feed line.

1 . An apparatus for constant supply of pulverized fuel at ambient or increased pressure to a pulverized fuel collector with compensation for and also attenuation of pressure fluctuations in the pulverized fuel feed line, comprising:
 a dispensing vessel wherein a dense swirl layer is provided in the lower part of the dispensing vessel in the pulverized fuel filling by supplying a swirl gas via a control valve by way of a swirl bed;   a pulverized fuel collector;   a pulverized fuel feed line which reaches into the swirl layer with a first end and a second end is connected to the pulverized fuel collector; and   a pulverized fuel control valve arranged in the pulverized fuel feed line,   wherein a pressure difference driving the pulverized fuel is provided between the dispensing vessel and the pulverized fuel collector,   wherein a measurement of a pulverized fuel stream is arranged in the pulverized fuel feed line,   wherein the measurement of the pulverized fuel stream is actively connected with the control valve such that the quantity of supplied swirl gas takes place in accordance with the measured pulverized fuel stream, and   wherein the measurement of the pulverized fuel stream is actively connected with the pulverized fuel control valve such that the passage cross-section is controlled in accordance with the measured pulverized fuel stream.   
     
     
         2 . The apparatus as claimed in  claim 1 , wherein the pulverized fuel feed line reaches horizontally into the swirl layer. 
     
     
         3 . The apparatus as claimed in  claim 1 , wherein the pulverized fuel feed line reaches vertically into the swirl layer. 
     
     
         4 . The apparatus as claimed in  claim 1 , wherein a fixed throttle facility is arranged in the pulverized fuel feed line between the dispensing vessel and the pulverized fuel control valve. 
     
     
         5 . The apparatus as claimed in  claim 1 , wherein an auxiliary gas supply is provided on a feed pipe inlet in the dispensing vessel. 
     
     
         6 . The apparatus as claimed in  claim 1 , wherein an auxiliary gas supply is provided in the pulverized fuel feed line between the dispensing vessel and measurement of the pulverized fuel stream. 
     
     
         7 . The apparatus as claimed in  claim 4 , wherein an auxiliary gas supply into the pulverized fuel feed line is provided between the dispensing vessel and the fixed throttle facility. 
     
     
         8 . The apparatus as claimed in  claim 4 , wherein an auxiliary gas supply is provided into the fixed throttle facility. 
     
     
         9 . The apparatus as claimed in  claim 4 , wherein an auxiliary gas supply into the pulverized fuel feed line is provided between the fixed throttle facility and the pulverized fuel collector. 
     
     
         10 . The apparatus as claimed in  claim 1 , wherein an auxiliary gas supply is provided into the pulverized fuel control valve. 
     
     
         11 . The apparatus as claimed in  claim 5 , wherein the measurement of the pulverized fuel stream is actively connected to the control valve for an auxiliary gas supply in order to meter the quantity of auxiliary gas. 
     
     
         12 . The apparatus as claimed in  claim 1 , wherein a plurality of pulverized fuel feed lines are arranged between the dispensing vessel and the pulverized fuel collector. 
     
     
         13 . The apparatus as claimed in  claim 1 , wherein the pulverized fuel is fed from an operational bunker to the dispensing vessel via at least one pressure sluice. 
     
     
         14 . The apparatus as claimed in  claim 1 , wherein the apparatus is provided by a pulverized coal feed system of a gasification facility operated above ambient pressure. 
     
     
         15 . The apparatus as claimed in  claim 4 , wherein the fixed throttle facility is provided by a Venturi tube. 
     
     
         16 . The apparatus as claimed in  claim 4 , wherein the fixed throttle facility is provided by a diaphragm. 
     
     
         17 . The apparatus as claimed in  claim 4 , wherein the fixed throttle facility is provided by a tubular assembly. 
     
     
         18 . The apparatus as claimed in  claim 4 , wherein the fixed throttle facility is provided by an uncontrolled valve. 
     
     
         19 . The apparatus as claimed in  claim 1 , wherein the pulverized fuel control valve is provided by a restrictable embodiment.