Sampling filter for chlorinated organic compounds

Abstract

A collector 3 capable of collecting and sampling simultaneously various types of chlorinated organic compounds in both particulate and gaseous forms contained in a fluid and easy to extract the sampled chlorinated organic compounds therefrom includes a sampling filter 7 installed in a holder 6 having a discharge route 12 a . The sampling filter 7 contains fibers and an inorganic binder for binding the fibers to one another and has a fluid-permeability. Various types of the chlorinated organic compounds such as dioxins and coplanar PCBs in both particulate and gaseous forms contained in a sample gas flowing into the holder 6 from a flue duct 25 through a sampling pipe 2 and an introduction pipe 8 are collected and sampled while the sample gas being passed through the sampling filter 7 and the resulting sample gas from which the chlorinated organic compounds are removed is then discharged out to the outside through the discharge route 12 a.

1 . A filter for removing chlorinated organic compounds contained in a fluid from the fluid flowing in a transportation pipe and sampling the chlorinated organic compounds, comprising: 
 a fluid-permeable molded body containing fibers and an inorganic binder for binding the fibers to one another,    wherein the molded body is a cylinder having an opening to insert the transportation pipe into one side and closed in the other side.    
   
   
       2 . The filter according to  claim 1 , wherein the molded body has a bulk density of 0.1 to 1 g/cm 3 .  
   
   
       3 . The filter according to  claim 1 , wherein the fibers are at least one kind of fibers selected from the group consisting of fibrous activated carbon, carbon fiber, glass fiber, alumina fiber, silica fiber and polytetrafluoroethylene fiber.  
   
   
       4 . The filter according to  claim 1 , wherein the inorganic binder has a chlorinated organic compounds-adsorbing capability.  
   
   
       5 . The filter according to  claim 4 , wherein the inorganic binder is at least one compound selected from the group consisting of alumina, zeolite and silicon dioxide.  
   
   
       6 . The filter according to  claim 1 , wherein the fibers are activated alumina fibers and the inorganic binder is granular activated alumina.  
   
   
       7 . The filter according to  claim 6 , wherein the molded body has a bulk density of 0.3 to 0.7 g/cm 3 .  
   
   
       8 . A method for producing a filter for removing chlorinated organic compounds contained in a fluid from the fluid flowing in a transportation pipe and sampling the chlorinated organic compounds, comprising the steps of: 
 producing a molding material containing fibers and an inorganic binder for binding the fibers to one another, and    obtaining a molded body by molding the molding material into a cylinder shape having an opening to insert the transportation pipe into one side and closed in the other side and then sintering the molded material.    
   
   
       9 . The method for producing a filter according to  claim 8 , wherein the method further comprises a step of immersing the molded body in an aqueous dispersion of the inorganic binder and then drying the molded body.  
   
   
       10 . A collector for collecting chlorinated organic compounds contained in a fluid, comprising: 
 a pipe for transporting the fluid containing the chlorinated organic compounds,    a filter of a fluid-permeable molded cylinder body having an opening in one side and closed in the other side and comprises fibers and an inorganic binder for binding the fibers to one another, and    a container for housing the filter,    wherein, the pipe is inserted into the opening for passing the fluid from the pipe through the filter and the container has an outlet for discharging the fluid that passed through the filter to the outside.    
   
   
       11 . The collector according to  claim 10 , wherein the filter has a bulk density of 0.1 to 1 g/cm 3 .  
   
   
       12 . The collector according to  claim 10 , wherein the fibers are at least one kind of fibers selected from the group consisting of fibrous activated carbon, carbon fiber, glass fiber, alumina fiber, silica fiber and polytetrafluoroethylene fiber.  
   
   
       13 . The collector according to  claim 10 , wherein the inorganic binder has a chlorinated organic compounds-adsorbing capability.  
   
   
       14 . The collector according to  claim 13 , wherein the inorganic binder is at least one compound selected from the group consisting of alumina, zeolite and silicon dioxide.  
   
   
       15 . The collector according to  claim 10 , wherein the fibers are activated alumina fibers and the inorganic binder is a granular activated alumina.  
   
   
       16 . The collector according to  claim 15 , wherein the filter has a bulk density of 0.3 to 0.7 g/cm 3 .