Water film dust removing and desulferizing device for furnace cupola

Abstract

The present invention relates to a water-film dust-removing desulphurization device that is used for a furnace cupola, which comprises a shell and a conical furnace cupola cover cap, wherein, the cover cap is fixed on the inner wall of the shell through a connection bar; the shell is connected to the top part of the furnace cupola body through a bottom hole; a water discharging groove is arranged on an annular bottom of the shell; an upper spraying unit and a lower spraying unit are arranged above the inner cover cap of the shell; the upper spraying unit comprises an upper bottom separation plate that is fixed on the inner wall of the shell; the upper bottom separation plate is provided with a plurality of uniformly-distributed smoke-pipe holes; each smoke-pipe hole is provided with an upper smoke-exhausting pipe; the upper ends of all upper smoke-exhausting pipes stay at the same plane; the lower spraying unit comprises a lower bottom separation plate that is fixed on the inner wall of the shell; the lower bottom separation plate is provided with uniformly-distributed smoke-pipe holes, and each smoke-pipe hole is provided with a lower smoke-exhausting pipe; the upper end surface of all lower smoke-exhausting pipe stay at the same plane; an inlet is arranged on the shell corresponding to the spraying units; a discharging port is arranged on the shell corresponding to the discharging groove; the water-film dust-removing desulphurization device has obvious energy conservation and drainage reduction effect, and has simple structure and low utilization cost, and is particularly suitable for the modification of the prior furnace cupola.

Description

technical field [0001] The invention belongs to a cupola water film dedusting and desulfurization device. Background technique [0002] The cupola is the traditional melting equipment of foundry enterprises, which is used to produce all kinds of iron castings. Cupola furnaces rely on the heat generated by coke combustion to melt metals; compared with induction melting furnaces, equipment costs are low, maintenance costs and operating costs are low, and there is a metallurgical process of chemical carburization. The furnace can realize continuous melting, therefore, the cupola furnace is still widely used production equipment in foundry enterprises. However, due to the characteristics of the cupola, during the operation of the cupola, the exhausted flue gas contains a large amount of particulate dust such as coke, iron oxide, and toxic gases such as sulfur oxide and carbon monoxide, which has caused serious pollution to the atmosphere and affected the lives of nearby residen...

AI Technical Summary

Problems solved by technology

The water curtain dust removal method is to install a water nozzle on the upper part of the cupola, and use high-pressure water to spray the water curtain horizontally. When the high-temperature furnace gas of the cupola passes through the water curtain, the larger particles collide with the water curtain to absorb water and mix with water. , with the water flowing into the sewage tank, part of the sulfur oxides in the furnace gas is also absorbed by the water to become sulfuric acid and separated from the furnace gas; due to the small thickness of the water film, the above method can only remove particles with a larger diameter in the cupola flue gas, and the flue gas The microparticles and most of the sulfur oxide gases in the air are still discharged into the atmosphere; in addition, the formation of a water film requires high-pressure water, which consumes a lot of power energy and high operating costs

The bag dust removal method is to use a high-power induced draft fan to introduce the flue gas from the cupola into the cyclone dust collector, and use the cooling effect and dust removal effect of the cyclone dust collector to remove large particles in the flue gas and reduce the temperature of the flue gas; Carry out bag dust removal to remove tiny particles in the flue gas. This type of dust removal method can remove most of the solid particles in the cupola flue gas, but it cannot remove harmful gases such as sulfur oxide and carbon monoxide in the flue gas; and this type of dust collector Large investment cost, large power consumption and high operating cost during operation

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