Dust Recycling and Re-Treating System and Method for the Dust Generated from Hazardous Waste Melting Process

Abstract

The present invention relates to a dust recycling and re-treating system and a method for the same, and in particular, to a dust recycling and re-treating system and a method for the same, which produces dusts generated from an incinerating and melting processing equipment for hazardous wastes, particularly, radioactive wastes, in a slurry form, and recycles and re-treats them within an existing melting furnace.

1 . A system of recycling and re-treating dusts generated from an incinerating and melting equipment for hazardous waste, comprising:
 a dust collection device of separating and collecting dusts from an off-gas generated from the incinerating and melting equipment for hazardous waste;   a slurry production device of mixing the dusts collected from the dust collection device with a water to produce a slurry; and   a slurry treatment device of feeding the slurry produced by the slurry production device to an existing melting furnace.   
   
   
       2 . The system according to  claim 1 , wherein the dust collection device comprises:
 a dust collection unit of separating the dusts from the off-gas and collecting the dusts;   a dust transport unit of transporting the dusts collected by the dust collection unit; and   a dust measurement unit of measuring the dusts transported from the dust transport unit.   
   
   
       3 . The system according to  claim 2 , wherein the dust measurement unit feeds the dusts to the slurry production device within a predetermined range of a maximum amount of the generated dusts in regardless of an amount of the dusts. 
   
   
       4 . The system according to  claim 1 , wherein the slurry production device comprises:
 a slurry production unit of mixing the dusts fed from the dust collection device with a water to produce a slurry; and   a slurry transport unit of transporting the slurry produced from the slurry production unit.   
   
   
       5 . The system according to  claim 1 , wherein the slurry treatment device comprises:
 a slurry storing unit of storing the slurry produced by the slurry production device;   a slurry feed unit of feeding the slurry stored in the slurry storing unit to the existing melting furnace; and   a nitrogen injection unit mounted at an end of the slurry feed unit and injecting the nitrogen.   
   
   
       6 . The system according to  claim 5 , further comprising:
 a slurry pre-storing unit of which one end is coupled with the slurry storing unit and temporarily stores the slurry,   wherein the other end of the slurry pre-storing unit is coupled between the slurry storing unit and the slurry transport unit.   
   
   
       7 . The system according to  claim 4  or  claim 6 , wherein a transport pump is mounted in the slurry transport unit, a return pipe of returning the slurry from the slurry transport unit to the slurry production unit is mounted, and the slurry is repeatedly circulated by the slurry production unit, the slurry transport unit and the return pipe to be uniformly mixed. 
   
   
       8 . The system according to  claim 2 , wherein a stirrer is mounted in the dust measurement unit. 
   
   
       9 . The system according to  claim 4 , wherein a stirrer is mounted in the slurry production unit or the slurry storing unit. 
   
   
       10 . The system according to  claim 6 , wherein a stirrer is mounted in the slurry pre-storing unit. 
   
   
       11 . The system according to  claim 1 , wherein the melting furnace is a glass solidification melting furnace. 
   
   
       12 . The system according to  claim 4 , wherein when a radioactive slurry is treated, the radioactive slurry is transported to the slurry storing unit when an operator has an access to the slurry production unit. 
   
   
       13 . The system according to  claim 6 , wherein when a radioactive slurry is treated, the radioactive slurry is transported to the slurry pre-storing unit when an operator has an access to the slurry storing unit. 
   
   
       14 . The system according to  claim 7 , wherein a water supply pipe of supplying the water is mounted in the slurry transport unit, and the water supplied from the water supply pipe is flown into the slurry production unit through the slurry transport unit and the return valve. 
   
   
       15 . A method of recycling and re-treating dusts generated from an incinerating and melting equipment for hazardous waste, comprising:
 a step of separating dusts from an off-gas generated from the incinerating and melting equipment for hazardous waste and collecting the dusts;   a step of mixing the dusts with a water to produce a slurry; and   a step of feeding the slurry to an existing melting furnace.   
   
   
       16 . The method according to  claim 15 , further comprising:
 between the step of collecting the dusts and the step of producing the slurry,   a step of transporting the collected dusts; and   a step of measuring the transported dusts.   
   
   
       17 . The method according to  claim 16 , wherein the step of measuring the dusts feeds the dusts to the step of producing the slurry within a predetermined range of a maximum amount of the generated dusts in regardless of an amount of the dusts. 
   
   
       18 . The method according to  claim 15 , further comprising:
 between the step of producing the slurry and the step of feeding the slurry,   a step of transporting the produced slurry; and   a step of storing the transported slurry.   
   
   
       19 . The method according to  claim 18 , further comprising:
 a step of temporarily pre-storing the slurry,   wherein it is determined whether an external input of an operator for maintenance is present after the step of storing the slurry, and the stored slurry is delivered to the step of pre-storing the slurry and the step of pre-storing the slurry returns the slurry to the step of transporting the slurry when the external input is present.   
   
   
       20 . The method according to  claim 18 , wherein the step of transporting the slurry measures whether the slurry has a uniform mixed condition, returns the slurry to the step of producing the slurry when the condition is less than a predetermined value, and transports the slurry to the step of storing the slurry when the condition is not less than the predetermined value.