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Limestone (Lime) Gypsum Flue Gas Desulfurization

Country/Region china
Company Qinhuangdao Jinheng Heavy Industry Co., Ltd.
Categories Flue Gas Desulfurization Systems
Telephone +86 335 5175 770
ICP License Issued by the Chinese Ministry
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Limestone (Lime) Gypsum Flue Gas Desulfurization

Limestone (Lime) Gypsum Flue Gas Desulfurization

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Working principle:

Use lime or limestone slurry absorb SO2 in flue gas, react to generate calcium sulfite, then oxidize calcium sulfite to annaline. Co-Product gypsum can be recyclable.

Chemical reaction:

1. Absorption process is in the absorption tower, the main reaction is as follows:

lime slurry as absorber:

Ca(OH)2+SO2CaSO31/2H2O

limestone slurry as absorber:

Ca(OH)2+1/2SO2CaSO31/2H2O+CO2

CaSO31/2H2O+CO2+1/2HO2Ca(HSO3)

Due to contain oxygen in the flue gas, the following reaction will occur:

2CaSO31/2H2O+O2+3H2O2CaSO42H2O

2. Oxidation process carry out in the oxidation zone, the main reaction is as follows:

2CaSO31/2H2O+O2+3H2O2CaSO42H2O

Ca(HSO3)2+1/2O2+H2OCaSO4H2O+SO2

Advantages:

Mature technology, high reliability running, wide range of applications. Sulfur dioxide removal efficiency up to 95%, can adapt to large capacity unit and high concentrations of sulfur dioxide in flue gas esulfurization. Absorber is cheap, and can be produced by-product - gypsum with a commercial value of complex utilization.

Cheap Limestone (Lime) Gypsum Flue Gas Desulfurization for sale
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