双碱法是采用钠基脱硫剂进行塔内脱硫的一种烟气净化技术，由于钠基脱硫剂碱

One kind of a double alkali flue gas desulfurization agent using a sodium-based desulfurization tower purification technology, since a strongly basic sodium based desulfurizing agent, the reaction product after the absorption of sulfur dioxide solubility, supersaturation will not cause crystallization, resulting in fouling jams . Which process is employed in the absorption tower of the flue gas circulating lye reverse spray of sulfur dioxide in flue gas is washed, desulfurized product was washed regeneration pool is discharged, reduction with calcium hydroxide regeneration, regenerated sodium-based desulfurizing agent was back again recycled desulfurization tower. Double alkali desulfurization process investment and operating costs of small and not likely to cause supersaturation crystallization, plug fouling problems for small and medium sized boiler desulfurization transformation. Process is as follows:

Double alkali method is a flue gas purification technology using sodium-based desulfurization agent for desulfurization in the tower, because of the strong alkaline of sodium-based desulfurization agent, the reaction product dissolved after the absorption of sulfur dioxide is large, will not cause super-saturation crystallization, resulting in fouling blockage problem. The process is to use circulating lye in the absorption tower to reverse spray the flue gas, to wash the sulfur dioxide in the flue gas, after washing the desulfurization products are discharged into the regeneration pool, with calcium hydroxide to reduce regeneration, regenerated sodium-based desulfurization agent was then re-used back to the desulfurization tower recycling. Double alkali method desulfurization process investment and operation costs are small, not easy to cause super-saturation crystallization, fouling clogging problems, suitable for small and medium-sized boilers for desulfurization transformation. The process is as follows:

The double alkali method is a kind of flue gas purification technology using sodium based desulfurizer for desulfurization in the tower. Due to the strong alkalinity of sodium based desulfurizer, the solubility of reaction products after absorption of sulfur dioxide is large, which will not cause supersaturation crystallization and scale blocking. The process is to use circulating alkali solution to spray the flue gas in reverse direction in the absorption tower to wash the sulfur dioxide in the flue gas. The desulfurized products after washing are discharged into the regeneration tank, and then the regenerated sodium based desulfurizer is recycled in the desulfurizing tower. Double alkali desulfurization process has less investment and operation cost, so it is not easy to cause supersaturated crystallization and scale blocking. It is suitable for desulfurization transformation of small and medium-sized boilers. The process flow is as follows: