High-temperature smoke dust removal method and system

Abstract

The invention discloses a high-temperature smoke dust removal method and system. Before high-temperature smoke is sent into a dust remover, a hardening and tempering agent is added to the smoke to absorb SO3 in the smoke, the dust viscosity is reduced, and meanwhile, agglomeration and coagulation performance of fine particles in the smoke is improved. The adopted system comprises a waste heat boiler, smoke hardening and tempering equipment and an electric bag composite dust remover, wherein the waste heat boiler is connected with a smoke exhaust port of a glass kiln and used for heat exchange and cooling of the high-temperature smoke; a smoke inlet of the electric bag composite dust remover is communicated with the waste heat boiler through a first pipeline; the smoke hardening and tempering equipment is arranged on the first pipeline and used for adding the hardening and tempering agent to the high-temperature smoke in the pipeline; a smoke outlet of the electric bag composite dust remover is connected to a denitration reactor through a fifth pipeline. The hardening and tempering agent is sufficiently mixed with the smoke, dust removal treatment is performed in combination of the electric bag composite dust remover, the dust removal effect is remarkable, and damage of the high-temperature smoke to the dust removal equipment is reduced.

Description

technical field [0001] The invention relates to a flue gas dust removal device, in particular to a high temperature flue gas dust removal method and system. Background technique [0002] The glass industry is one of the key industries in the field of industrial pollution control in my country. At present, there are more than 2,000 glass production lines, and the annual dust emission reaches tens of thousands of tons. Due to the high calorific value and low price of petroleum coke, in order to reduce the production cost of glass enterprises, the current trend of fuel used in glass production lines is to change from heavy oil to petroleum coke. The highly viscous dust emitted from petroleum coke flue gas in glass melting furnaces has become an urgent problem to be solved in glass production. [0003] The dust in the flue gas of petroleum coke contains a large amount of alkali metals. If the kiln flue gas is directly denitrated, the dust will greatly reduce the activity and li...

AI Technical Summary

Problems solved by technology

At present, optional equipment for dust control in high-temperature flue gas of glass kiln includes electrostatic precipitator and bag filter, because the flue gas of petroleum coke discharged from glass kiln has high temperature, fine dust, high alkali metal content, strong corrosion properties, strong hygroscopicity, low specific resistance, high viscosity, etc. When the electric precipitator dedusts the flue gas of petroleum coke, various problems such as dust adhesion, component damage, and low dust removal efficiency occur.

Although the Chinese patent with the application number 201410616155.8 and the publication number CN104289086A discloses a method and device for removing high-concentration dust in the flue gas of a glass furnace, it controls the viscous dust by an electrostatic precipitator after conditioning, although The properties of the dust are improved and the viscosity is reduced, but there are problems such as insufficient mixing of the conditioner and the dust in the flue gas, secondary dust generation, and the inability to remove PM2.5 fine particles.

However, the conventional bag filter cannot operate under high temperature conditions. Even if high temperature filter material is used, the service life is usually not more than one year, and there are often risks of burning and clogging, and the operating pressure drop is relatively large; at the same time, high-viscosity dust is easy to stick to the bag Lead to the destruction of the entire system and high operating costs

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