Automatic tritium extraction method for environmental monitoring

Abstract

An automatic tritium extraction method for environmental monitoring comprises the following steps: 1) cleaning of a distillation chamber; 2) distillation rising; 3) distillation; 4) condensation; 5) discharging samples out of the distillation chamber. By the adoption of the automatic tritium extraction device and method for environmental monitoring, fully-automatic distillation and condensation of environmental tritium samples, automatic cleaning of the distillation chamber, and automatic and accurate addition of required agents are realized, and fully-automatic acquisition, preparation, distillation, purification, measurement and analysis of environmental tritium can be completed; and manual intervention is reduced, so that monitoring results are more accurate, and labor costs are saved.

What is claimed is: 
     
         1 . An automatic tritium extraction method for environmental monitoring, comprising the following steps:
 1) cleaning of a distillation chamber: a cleaning fluid is used, a first pump is started to pump a specified quantity of the cleaning fluid into the distillation chamber, a temperature control unit is started to heat the distillation chamber to a preset temperature, then a third pump is started to deliver outside air into the distillation chamber, and when agitation cleaning of the distillation chamber is completed, mixed liquor in the distillation chamber is discharged by the third pump;   2) distillation rinsing: a distilling fluid is used, a second pump is started to pump a specified quantity of samples into the distillation chamber, then, the first pump is started to pump a specified quantity of the distilling fluid into the distillation chamber, and the temperature control unit is started to maintain the temperature of an outer wall of the distillation chamber at the preset temperature, and a collection tank containing finished products is replaced with an empty collection tank;   3) distillation: the distilling fluid is used, the second pump further pumps a specified quantity of samples into the distillation chamber, the first pump is started to pump a specified quantity of the distilling fluid into the distillation chamber, and the temperature control unit is started to maintain the distillation chamber at a preset temperature and is stopped when the distillation amount reaches a preset value;   4) carrying out condensation when Step 2) and Step 3) are performed: an auxiliary condensation unit is started, and a condensing agent is delivered into a condensing agent circulation chamber via a lower tube and flows back into a cavity via an upper tube after being subjected to heat exchange in the condensing agent circulation chamber;   5) discharging samples out of the distillation chamber: the second pump further pumps the rest of samples in a sample tank into the distillation chamber, and the third pump is started to discharge all the samples out of the distillation chamber.   
     
     
         2 . The automatic tritium extraction method for environmental monitoring according to  claim 1 , wherein the preset temperature in Step 1) and Step 2) is 80-100° C., and the preset value in Step 3) is 500-700 mL.