Waste mercury recovery device

Abstract

A waste mercury recovery device including an infrared heater, used for heating mercury-containing waste; a waste mercury device, placed on the infrared heater, and used for holding the mercury-containing waste; a pure mercury recovery extractor, including a mercury vapor cooling part and a pure mercury storage part; a mercury vapor cooling part, communicated with the waste mercury device, and used for cooling mercury vapor; and a pure mercury storage part, communicated with the mercury vapor cooling part, and used for storing cooled and liquefied mercury.

What is claimed is: 
     
         1 . A waste mercury recovery device, comprising:
 an infrared heater, used for heating mercury-containing waste;   a waste mercury device, placed on the infrared heater, and used for holding the mercury-containing waste;   a pure mercury recovery extractor, comprising a mercury vapor cooling part and a pure mercury storage part;   a mercury vapor cooling part, communicated with the waste mercury device, and used for cooling mercury vapor; and   a pure mercury storage part, communicated with the mercury vapor cooling part, and used for storing cooled and liquefied mercury.   
     
     
         2 . The waste mercury recovery device according to  claim 1 , wherein the mercury vapor cooling part includes an inner pipe and an outer pipe arranged outside the inner pipe in a sleeving manner; the inner pipe is communicated with the waste mercury device; and the outer pipe is used for holding a refrigerant. 
     
     
         3 . The waste mercury recovery device according to  claim 2 , wherein the refrigerant is liquid nitrogen; the waste mercury recovery device further comprises:
 a liquid nitrogen tank, used for storing the liquid nitrogen;   a liquid nitrogen input pipe, a first end being communicated with a bottom of the outer pipe, and a second end being communicated with the liquid nitrogen tank;   a liquid nitrogen output pipe, a first end being communicated with a top of the outer pipe, and a second end being communicated with the liquid nitrogen tank; and   a liquid nitrogen pump, arranged on the liquid nitrogen input pipe, and used for conveying liquid nitrogen to the outer pipe.   
     
     
         4 . The waste mercury recovery device according to  claim 2 , wherein a pipe wall of the outer pipe and a pipe wall of the pure mercury storage part are integrally formed; the mercury vapor cooling part is located at an upper part of the pure mercury storage part, and a partition plate is arranged between the mercury vapor cooling part and the pure mercury storage part; the partition plate is used for partitioning the internal space of the outer pipe from the internal space of the pure mercury storage part; an opening of a lower end of the inner pipe penetrates through the partition plate and is inserted into the pure mercury storage part; a mercury vapor inlet is formed in an outer wall of the pure mercury storage part; and the mercury vapor inlet, with a position higher than that of an outlet of the waste mercury device, is communicated with the outlet of the waste mercury device. 
     
     
         5 . The waste mercury recovery device according to  claim 2 , wherein a vent hole is formed in a top of the inner pipe. 
     
     
         6 . The waste mercury recovery device according to  claim 2 , wherein the inner pipe is fixed to an inner wall of the outer pipe through a fixed frame. 
     
     
         7 . The waste mercury recovery device according to  claim 1 , wherein a pure mercury output end with a valve is arranged at a bottom of the pure mercury storage part. 
     
     
         8 . The waste mercury recovery device according to  claim 2 , wherein a pure mercury output end with a valve is arranged at a bottom of the pure mercury storage part. 
     
     
         9 . The waste mercury recovery device according to  claim 4 , further comprising a mercury vapor conveying pipeline, wherein a first end of the mercury vapor conveying pipeline is communicated with the mercury vapor inlet, and a second end of the mercury vapor conveying pipeline is communicated with the outlet of the waste mercury device.