Flue gas treatment system

Abstract

The invention discloses a flue gas treatment system. The system includes: a first-stage efficient washer provided with a first reverse spray pipe and a first gas-liquid separation tower, wherein the first reverse spray pipe is provided with a first flue gas inlet, a first scrubbing solution nozzle and a first mixed gas-liquid outlet, and the first gas-liquid separation tower is provided with a first mixed gas-liquid inlet, a first flue gas outlet and a first scrubbing solution outlet; a second-stage efficient washer provided with a second reverse spray pipe and a second gas-liquid separation tower, wherein the second reverse spray pipe is provided with a second flue gas inlet, a second scrubbing solution nozzle and a second mixed gas-liquid outlet, and the second gas-liquid separation tower is provided with a second mixed gas-liquid inlet, a second flue gas outlet and a second scrubbing solution outlet; a first-stage electric demister provided with a third flue gas inlet, a first-stageelectric demisting drain outlet and a third flue gas outlet; a flue gas cooler provided with a fourth flue gas inlet, a cooler drain outlet and a fourth flue gas outlet; a second-stage electric demister provided with a fifth flue gas inlet and a fifth flue gas outlet; and a desulfurization device provided with a sixth flue gas inlet and a flue gas outlet.

Description

technical field [0001] The invention belongs to the field of flue gas treatment of non-ferrous metal anode slime fire process, in particular, the invention relates to a system for treating flue gas. Background technique [0002] At present, the traditional methods for processing copper, lead, and zinc anode slimes in China generally include wet process and fire process. In addition, there is the Kaldor furnace process imported from abroad. [0003] The traditional domestic wet process has problems such as long process, large backlog of precious metals, large amount of waste water, and difficulty in completely removing lead elements. At the same time, due to the complex composition of anode slime, different companies adopt different processes, and the adaptability of the process is poor. For this reason, more and more domestic enterprises adopt pyrotechnics, and the flue gas produced by the process of pyrotechnic treatment of non-ferrous metal anode slime has high temperature...

AI Technical Summary

Problems solved by technology

There are disadvantages such as high cost of introduction and relatively low recovery rate of selenium element, and the technology imported from abroad adopts Venturi washing process for this kind of flue gas treatment, which is easy to cause problems such as blockage of equipment pipelines and large flue gas resistance

Some projects have been improved on the basis of foreign technology, although the equipment investment cost has been reduced, but there is still the problem that the tail gas contains high noble metal selenium, resulting in a low recovery rate of selenium

Images