Baking soda (sodium bicarbonate)）SDSDry Desulfurization Grinder

Baking soda (sodium bicarbonate)）SDSDry Desulfurization GrindingBasic principles

Sodium bicarbonate (baking soda, NaHCO₃) can be used as an adsorbent for flue gas desulfurization. It removes acidic pollutants from flue gas through chemical adsorption, while also removing certain inorganic and organic trace substances through physical adsorption. In this process, fine sodium bicarbonate powder is directly sprayed into high-temperature flue gas. Under high temperature, sodium bicarbonate decomposes to produceSodium carbonate Na2CO3, H2O and CO2.

The newly generated sodium carbonate (Na₂CO₃) exhibits high reactivity at the moment of formation and can spontaneously undergo the following reactions with acidic pollutants in the flue gas.

Under normal conditions, the flue gas temperature ranges between 140 and 250 °C. Due to the high reactivity of sodium bicarbonate as an adsorbent, a slight excess of sodium bicarbonate (with a stoichiometric factor between 1.1 and 1.3) is typically sufficient.

In principle, sodium carbonate (Soda, Na2CO3) can also be used for flue gas desulfurization. The reactivity of sodium carbonate is slightly lower, but the process flow remains almost unchanged. This article will not further elaborate on sodium carbonate desulfurization.

Due to transportation and storage constraints, sodium bicarbonate raw material is typically in coarse granules (with a d50 value of approximately 200 microns). To achieve higher reactivity, the adsorbent must have a larger specific surface area. Therefore, before being injected into the flue gas duct, sodium bicarbonate must be ground to a certain fineness. For example, to remove SO2, the fineness of sodium bicarbonate must reach d90 < 20 µm. For HCl removal, only d90 < 35 µm is required. If the system operates correctly, over 95% of SO2 can be removed, and the removal rate of HCl can even reach 99%. The dry desulfurization process uses a pulverizer with an integrated classification system combined with a conveying fan to form a complete grinding and powder injection unit. The ground sodium bicarbonate fine powder exhibits a layered or porous structure, with uniform particle size and good dispersibility. It is then directly injected into the furnace or reaction tower through multiple nozzles in the form of solid ultrafine powder.

Performance Characteristics of the SDS Dry Desulfurization Grinding Mill for Sodium Bicarbonate (Sodium Bicarbonate):

(1) This machine is a vertical-shaft impact-type crusher, equipped with a classification device inside the crushing chamber. The crushed material is subjected to the action of airflow.

Separated by a classification device, which replaces the usual crusher screen, it can simultaneously complete the two processes of fine powder crushing and fine powder classification.

Preface, high crushing efficiency.

(2) Equipped with an airflow regulating valve and a stepless speed controller for the classifying rotor, the product particle size can be adjusted without stopping the machine, ensuring no contamination.

Environment.

(3) The unique flow field design and constant gas-solid ratio concentration control ensure a short residence time of the material within the chamber, preventing the material from...

Adhered to the inner wall of the cavity.

（4）The crushing hammer head and tooth plate are made using special processes and materials, ensuring a long service life.

Using sodium bicarbonate (baking soda) for dry desulfurization not only meets stringent environmental requirements but also effectively reduces investment and operational costs compared to other flue gas purification methods!

SDS Dry Desulfurization Grinder for Sodium Bicarbonate (Baking Soda)Application:

This process can be widely used in the field of dry flue gas purification, such as coal-fired power plants, waste or alternative fuel incineration plants. It can also be extensively applied to industrial exhaust gases from glass, biomass combustion, cement, metallurgy, and other industries, which contain acidic substances such as SO2, HCl, etc.