Method and device for controlling the condenser cooling water of a steam-jet vacuum pump

Abstract

The invention relates to method and a device for controlling condenser cooling water of a steam-jet vacuum pump in non-barometric installation; wherein an outer measuring pot constructed as communicating container provides the target value for a speed-controlled pump by means of measuring sensors.

1 . A method for controlling a condenser cooling water pump of a steam-jet vacuum pump in a non-barometric installation, comprising the steps of:
 measuring cooling water level of the condenser in a measuring pot, which is mounted outside of the condenser and which is configured as a communicating container, by means of a measuring method suitable for vacuum operation; and   using the measured level as a measured variable for adjusting the delivery volume of a speed-controlled cooling water pump.   
     
     
         2 . The method for controlling a condenser cooling water pump of a steam-jet vacuum pump in non-barometric installation according to  claim 1 , wherein upon exceeding a specified alarm level, an alarm cutoff is carried out by means of a float switch. 
     
     
         3 . A device for controlling a condenser cooling water pump of a steam-jet vacuum pump in non-barometric installation, wherein outside of a cooling water condenser of a steam jet vacuum pump, a measuring pot configured as a communicating container with a pressure equalization line is mounted, wherein for the purpose of level measurement, at the upper end of said measuring pot, a measuring probe suitable for vacuum operation is mounted, which probe in turn provides the input signal for controlling a speed-controlled cooling water pump. 
     
     
         4 . The device according to  claim 3 , wherein a radar probe is used as the measuring probe for the level measurement. 
     
     
         5 . The device according to  claim 3 , wherein the measuring probe for the level measurement is a laser probe. 
     
     
         6 . The device according to  claim 3 , wherein
 the pressure equalization line connected with the condenser interior is inserted into the upper region of the condenser interior and redirected downwards in such a manner that penetration of splash water is avoided to a large extent.   
     
     
         7 . The device according to  claim 3 , wherein in a position of the highest permissible level, a mechanical float switch is mounted as a safety alarm sensor. 
     
     
         8 . The device according to  claim 3 , wherein a connection and discharge pipe mounted between a lower end of the level measuring pot and a condenser water down pipe is arranged at an angle of maximum 50°, to vertical. 
     
     
         9 . The device according to  claim 8 , wherein the angle is 30° to vertical.