Caso in a kind of desulfurization ash 3 stabilization method

Abstract

The invention relates to the field of resource utilization of solid waste, and discloses a CaSO 3 Stabilization method to solve the problem of CaSO in desulfurization ash in the prior art 3 When exploiting, it either deals with high cost or technical problems with poor application effect. The method comprises: first obtaining a mixture of desulfurization ash and rock-stripping tailings particles, wherein the total mass of the desulfurization ash is 5% to 20% of the total mass of the rock-stripping tailings particles; Spray a preset amount of water into the mixture of the stripped rock tailings particles, and the amount of water sprayed is 10% to 15% of the total mass of the mixture; finally, cover the mixture through a shelter, and spray water to the mixture every 5 to 7 days. The mixture is further sprinkled with 5% to 10% of the total mass of the mixture for curing, and the curing time is 6 to 13 weeks, so as to remove the CaSO in the desulfurization ash 3 Generate ettringite. The technical effect of reducing the treatment cost while effectively utilizing the desulfurization ash is achieved.

Description

technical field

[0001] The invention relates to the field of resource utilization of solid waste, in particular to a CaSO 3 stabilization method. Background technique

[0002] The semi-dry sintering flue gas desulfurization process is a common flue gas purification technology. Typical processes include CFB method, SDA method, MEROS method, NID method, etc. In these processes, quicklime is often used as a desulfurizer, and the quicklime is first converted through a digestion process In order to digest the lime, it enters the desulfurization tower and the SO in the flue gas 2 The reaction produces CaSO 3 . CaSO 3 In the semi-dry flue gas desulfurization process, only a small amount is oxidized to CaSO 4 , a large amount of CaSO 3 Enter the end by-product desulfurization ash. Practice shows that the chemical composition of semi-dry sintering flue gas desulfurization ash is mainly about CaSO 3 1 / 2H 2 O accounts for 25-40%, CaSO 4 2H 2 O accounts for 5-15%, Ca(OH) 2 2...

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