Metal flue gas treatment and purification system

Abstract

The invention belongs to the field of flue gas purification, and provides a metal flue gas processing and purifying system used for controlling environmental pollution. The metal flue gas processing and purifying system comprises a condenser, a spray absorption tower, and a washing tower which are connected via pipelines; a plurality of spiral spray nozzles are arranged in the spray absorption tower; a first circulating groove is arranged outside the spray absorption tower; the first circulating groove is filled with a calcium hydrate solution; the lower part of the spray absorption tower is connected with a side part of the first circulating groove via a first pipeline; a pipeline communicated with the spiral spray nozzles is communicated with the side part of the first circulating groove via a second pipeline; the second pipeline is provided with a first circulating liquid pump; the top part of the spray absorption tower is connected with the washing tower via a third pipeline; the washing tower is provided with a filling material layer; a three-dimensional demister is arranged above the filling material layer; the top part of the washing tower is provided with a clean gas outlet, and clean gas can be discharged into aerosphere via a draught fan; a second circulating groove is arranged outside the washing tower; the second circulating groove is filled with a sodium hydroxide solution; a pipeline communicated with the three-dimensional demister is inserted into the second circulating groove via a fourth pipeline; and the fourth pipeline is provided with a second circulating liquid pump.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a metal flue gas treatment and purification system for controlling environmental pollution. Background technique [0002] Non-ferrous metal smelting flue gas has complex components and harmful gases (such as sulfur, chlorine, mercury, cadmium, aluminum or arsenic). The flue gas components are slightly soluble in water and undergo high-temperature oxidation during the smelting process. At 900°C, volatile or other substances react with each other and are discharged into the atmosphere with the carrier gas (air). They can float in the air for a long time, or fall when it rains, and finally deposit on the surface of plants or soil and be absorbed by crops and humans. It is extremely harmful to human health, and the pollution to the environment seems to be destructive. In my country, the non-ferrous metal smelting flue gas treatment system is extremely imperfect. [0003] For the t...

AI Technical Summary

Problems solved by technology

[0002] Non-ferrous metal smelting flue gas has complex components and harmful gases (such as sulfur, chlorine, mercury, cadmium, aluminum or arsenic). The flue gas components are slightly soluble in water and undergo high-temperature oxidation during the smelting process. At 900°C, volatile or other substances react with each other and are discharged into the atmosphere with the carrier gas (air). They can float in the air for a long time, or fall when it rains, and finally deposit on the surface of plants or soil and be absorbed by crops and humans. Human health is extremely harmful, and the pollution to the environment seems to be destructive. In my country, the non-ferrous metal smelting flue gas treatment system is extremely imperfect

[0003] For the treatment of non-ferrous metal smelting flue gas, the treatment methods often used in China: 1. Using NaOH 2 Secondary purification method, due to the high temperature reaction to other substances, mist dragons appear in the exhaust pipe and entrain harmful substances such as particles. After adsorption and purification by activated carbon, metal and heavy metal elements are difficult to adsorb, and it is easy to reach saturation and high cost

2. Using methods such as electron beam irradiation and pulsed corona, the amount of flue gas is large, and heavy metal components cannot be oxidized, so it is difficult to meet the purification requirements

Images