Device for reliable filling level control in a quenching chamber that is arranged downstream of entrained-flow gasification and has inert-gas flushing of the pressure-recording measuring location
View Patent ↗A device for the reliable measurement and control of the filling level in the quencher sump of a quenching chamber arranged downstream of the gasifying chamber is provided. The device has a differential-pressure transmitter. The measuring location recording the pressure of the gas chamber is flushed with inert gas. The device unproblematically senses the pressures in the quenching chamber and at the bottom of the quencher sump. The difference between which is used as a controlled variable for the filling level.
1. A device for reliable filling level control in a quenching chamber, wherein the quenching chamber receives a hot raw gas and liquid slag from an entrained-flow gasifying reactor and cools the hot raw gas and liquid slag by injecting an excess of quenching water forming a water bath in a lower part of the quenching chamber, wherein a water level of the water bath can be controlled between a minimum level and a maximum level, wherein a raw-gas outlet is located above the water level of the water bath, the device comprising:
a differential-pressure transmitter comprising a first pressure-recording location for exposure to a pressure in a gas chamber of the quenching chamber and a second pressure-recording location for exposure to a pressure at a bottom of the water bath, wherein the differential-pressure transmitter provides an information signal as a measure of a geodetic height of the water bath; and
a feed of inert gas line connecting the first pressure-recording location to the gas chamber that is adapted to provide an inert gas flushing,
wherein the quenching chamber comprises an inner shell as a skirt and an outer pressure-bearing shell,
wherein a skirt flushing is arranged between the inner shell and the outer pressure-bearing shell,
wherein the skirt flushing overflows into an interior of the inner shell,
wherein the feed of inert gas line connecting the first pressure-recording location to the gas chamber is connected to a quenching lance,
wherein a sleeve enclosing the quenching lance is arranged and the inert-gas flushing is provided through the sleeve, and
wherein the sleeve is drawn forward into the gas chamber to an extent that the sleeve protrudes beyond a nozzle head of a spray nozzle by 1 to 4 times a spray nozzle diameter.
2. The device as claimed in claim 1 , wherein the feed of inert gas line connecting the first pressure-recording location to the gas chamber is connected into the skirt flushing.
3. The device as claimed in claim 2 , wherein the skirt flushing comprises a first skirt flushing arranged at a lower level and a second skirt flushing arranged at an upper level, and wherein the feed of inert gas line connecting the first pressure-recording location to the gas chamber is connected into the first skirt flushing.
4. The device as claimed in claim 2 , wherein the feed of inert gas line is connected in a vicinity of an overflow of the skirt flushing.
5. The device as claimed in claim 1 , wherein the sleeve finishes flush with the skirt.
6. The device as claimed in claim 1 , wherein a line connecting the second pressure-recording location to the bottom of the water bath can be flushed with fresh water.