Baking is an important process in the production of carbon products. The roasting of raw products is carried out in a roasting furnace using coke powder as a protective medium. Under the condition of isolating air, according to the technical requirements of the product, it is heated at a certain heating rate to the highest roasting temperature.

The roasting furnace uses raw coal as fuel. During the roasting process, the smoke and dust generated by the initial combustion of raw coal, as well as the Zhejiang green in carbon green blocks, can emit a large amount of Zhejiang green smoke due to high-temperature pyrolysis. Zhejiang green smoke is a mixture of a large amount of liquid and a small amount of gaseous polycyclic aromatic hydrocarbons, usually containing harmful substances such as benzo [a] pyrene and benzo [a] anthracene. At present, the flue gas purification methods for roasting furnaces that are being researched and applied both domestically and internationally include combustion method, absorption method, and adsorption method. Among them, combustion method requires flue gas temperature>700 ° C, and the concentration of Zhejiang green smoke is relatively high; The absorption method often uses organic liquids such as gasoline and diesel as absorbents, which have low purification efficiency and the problem of secondary pollution; The adsorption method uses porous materials with a larger specific surface area (such as activated carbon, coke powder, alumina, etc.) as adsorbents for physical adsorption, but the system resistance is high and it is difficult to replace the filter material.

The purpose of this utility model is to provide a flue gas purification treatment device for a roasting furnace with high purification efficiency. To achieve the above objectives, the technical solution adopted by the present utility model is a flue gas purification treatment device for a roasting furnace, including a spray treatment system and an electrostatic treatment system; The spray treatment system includes a spray chamber, with a smoke inlet at the lower part of the spray chamber, a sewage outlet at the bottom of the spray chamber, spray ports on the side walls of the spray chamber, and a smoke outlet at the upper part of the spray chamber; The electrostatic treatment system includes a cylinder with an air inlet at the lower part, a corona electrode inside the cylinder, an air outlet at the upper part of the cylinder, and a dust outlet on the lower side wall of the cylinder; The flue gas outlet of the spray treatment system is connected to the air inlet of the electrostatic treatment system.

Above the air inlet in the cylinder, there is an airflow distribution plate, and above the airflow distribution plate, there is a corona electrode. This utility model can remove smoke particles and substances such as Sh from flue gas through a spray treatment system, achieving a pre-treatment effect, while also reducing the temperature of the flue gas, lowering the specific resistance of the flue gas, and facilitating the charging of particulate matter and Zhejiang green smoke in an electric field; Through an electrostatic treatment system, harmful substances such as benzo [a] pyrene and benzo [a] anthracene can be effectively absorbed and treated. The utility model has the advantages of simple structure, low investment, low system resistance, high purification efficiency, no secondary pollution problem, and various pollutants can be discharged in compliance with standards after treatment.