Destination of desulfurization liquid
Thread Content
The chemical desulfurization process has been in operation for 4 months now; it uses the HPF method for desulfurization, and the concentrated ammonia solution produced by the ammonia evaporation tower is sent to the desulfurization tower. The salt recovery station has not yet been completed. The liquid level in the desulfurization tower is specified to be no more than 5.5 meters; if this value is exceeded, the desulfurization liquid must be drained. It used to be placed in the ammonia vaporization wastewater tank, and eventually ended up in the wastewater treatment system or coke quenching tank. Recently, due to the strong odor in the coking belt corridor, the discharge of desulfurization liquid has been prohibited. Therefore, the desulfurization liquid from the tower was transferred successively to the backup desulfurization tower and the emergency tank; these tanks soon became full as well. So where should the desulfurization liquid be discharged? Someone suggested obtaining it from the coal yard, but the manager said that the sulfur in the desulfurization liquid ends up in the gas during coking, increasing the load on the desulfurization unit and creating a vicious cycle.
The HPF desulfurization method is designed to use the desulfurization solution in coal blending at coal plants, and our plant uses it as well. This desulfurization equipment is inexpensive, which means it has its drawbacks. Either add a set of salt-extraction units to treat the desulfurization liquid, or use steam to process the sulfur foam. If that doesn’t work, use a set of flue gas desulfurization systems to treat the air.
Producing sulfuric acid from desulfurization liquid, and the salt obtained is also difficult to handle. But the investment is relatively large, amounting to tens of millions, yet it solves the problem once and for all. Sulfuric acid can meet its own needs.
It will not increase the load on the desulfurization unit, nor will it create a vicious cycle; you can do the calculations for the management! !
It will not increase the load on the desulfurization unit, nor will it create a vicious cycle. I agree with your view, but these days it is politics that guides production, not science. To go a step further: those who understand technology cannot become leaders, and those who are leaders don’t need to understand technology.