A desulfurizer composition and its application in cement clinker production

Abstract

The invention discloses a desulfurizer composition and its application in the production of cement clinker. The composition includes powder and water, and the powder and water respectively include a desulfurizer and a catalyst. Powder desulfurizers include Ca(OH) 2 , NaHCO 3 , SrCO 3 and / or BaCO 3 . The desulfurizer of the water agent is an aqueous solution containing ammonia radicals, and the catalyst of the water agent is made of NaHCO 3 and potassium permanganate. The desulfurizer composition of the present invention contains NaHCO 3 , using NaHCO 3 Disposal of Ca(OH) 2 During the process, Na ions enter Ca(OH) 2 The crystal structure forms substitute or interstitial impurity atoms. Since sodium ions and calcium ions have different radii, the introduction of sodium ions distorts the original crystal structure and produces defects, thereby forming a pore distribution and pore size that are conducive to sulfur fixation.

Description

technical field [0001] The invention belongs to the field of additives for cement clinker production, in particular to a desulfurizer composition and its application in cement clinker production, which can be used for desulfurization of tail gas during cement clinker production. Background technique [0002] With the deterioration of the environment, the country's environmental protection policy is becoming increasingly stringent. SO 2 Emission≤200mg / Nm 3 In some economically developed areas (Guangdong, Shandong, Beijing-Tianjin-Hebei, Hangzhou, etc.), the "Emission Standards of Air Pollutants for Cement Industry Enterprises" even stipulates SO 2 Emission≤100mg / Nm 3 . [0003] At present, there are three mainstream desulfurization technologies for domestic cement kiln systems: wet desulfurization, dry desulfurization, and ammonia desulfurization. [0004] 1. Wet desulfurization: limestone / gypsum method, build a desulfurization tower at the end of the kiln, subdivide lim...

AI Technical Summary

Problems solved by technology

[0020] The primary purpose of the present invention is to provide a desulfurizer composition, emphatically solving several problems of desulfurization in the existing cement clinker production: 1, the sulfur-fixed product of the existing dry desulfurization is CaSO 4 , which is easy to decompose, causing the recirculation of sulfur in the kiln, and does not completely solve the problem of desulfurization (or sulfur emission); 2. The oxygen content in the tail gas of cement clinker kiln is low, which reduces the SO 2 to SO 3 The conversion efficiency affects the desulfurization effect; 3. The powder desulfurization substances are difficult to disperse, resulting in low desulfurization efficiency

Images