Coal-fired boiler flue gas desulfurization and dust removal equipment

Introduction to Coal-fired Boiler Flue Gas Desulfurization and Dust Removal Equipment:

Coal-fired boiler desulfurization and dust removal equipment is an important device used to reduce atmospheric pollutants emitted from coal-fired boilers. There are many types, with varying principles and prices. The following is a detailed introduction to coal-fired boiler desulfurization and dust removal equipment:

I. Types

Coal-fired boiler desulfurization and dust removal equipment is mainly divided into two categories: dry and wet.

1. Dry Dust Removal Equipment: Includes gravity settling chambers, inertial dust removal equipment, electrostatic precipitators, baghouse dust collectors, and cyclone dust collectors. Among these, baghouse dust collectors and cyclone dust collectors are more common types. Baghouse dust collectors capture dust in the flue gas through filtration by bags, achieving high dust removal efficiency; while cyclone dust collectors use centrifugal force to separate dust particles from the flue gas, featuring a simple structure but relatively lower dust removal efficiency.
2. Wet Dust Removal Equipment: Includes spray towers, impact dust removal equipment, Venturi scrubbers, foam dust removal equipment, and water film dust removal equipment. Wet dust removal equipment primarily uses water mist or water film to react with pollutants such as dust and SO₂ in the flue gas, capturing and removing them. Among these, Venturi scrubbers and spray towers are more common wet desulfurization and dust removal equipment.

II. Principles

The principle of coal-fired boiler desulfurization and dust removal equipment mainly involves using physical and chemical methods to remove pollutants such as dust and SO₂ from the flue gas.

1. Dust Removal Principle: Primarily separates dust particles from the flue gas through filtration, centrifugal separation, and inertial separation. For example, baghouse dust collectors capture dust through the filtration effect of bags; cyclone dust collectors use the centrifugal force generated by the flue gas in the cyclone tube to separate dust particles.
2. Desulfurization Principle: Mainly involves chemical reactions with pollutants such as SO₂ in the flue gas to convert them into harmless substances. For example, the limestone-gypsum wet desulfurization method in wet desulfurization and dust removal equipment uses limestone slurry to react with SO₂ in the flue gas, producing harmless substances such as calcium sulfate.