Limestone-gypsum wet flue gas desulfurization system，1# Desulfurization system is two furnaces and one tower, 2# Desulfurization system is one furnace and one tower. When the SO₂ concentration of the desulfurization inlet is about 1000 mg/Nm³, the outlet SO₂ concentration will rise to about 50 mg/Nm³. 1# desulfurization and 2# desulfurization systems are equipped with three circulating pumps.

It is necessary to increase the sulfur content of raw materials by 20~30%, that is, the inlet SO₂ concentration is increased from 1000mg/Nm³ to 1200mg/Nm³, and the export SO₂ emission is ensured not to exceed the standard.

Application

Stage 1: Add desulfurization synergist, stop a slurry circulating pump, increase the sulfur content of the inlet and observe the desulfurization efficiency.

Stage 2: Three slurry circulating pumps are operated at the same time, increasing the inlet sulfur and observe the limit value at which the sulfur can be increased.

Operational Results

Stage 1:Comparative Results

1# Desulfurization System

2# Desulfurization System

The above data shows that after the addition of the desulfurization synergist, the sulfur content of the desulfurization system is significantly reduced.

Stage 2: Comparative Results

Unit：mg/Nm³

From the above operational data, it can be seen that under the operation of the three pumps, the maximum sulfur content of the inlet is increased by 32-44%, the desulfurization system can operate stably, and the sulfur output can still meet the standard discharge.

Benefits

1- Control the export of SO₂ through POLYMER desulfurization synergist, so that high-sulfur ore raw materials can be used, which greatly reduces the procurement cost of iron ore raw materials.  

2-When the average sulfur content of the inlet is lower than 1700 mg/Nm³, a circulating pump can be shut down, which can save a lot of electricity bills.

POLYMER’s Desulfurization Synergist

POLYTE^® 4080A

POLYTE^® Pro505

POLYTE^® 503

POLYTE^® 502