Spherical desulfurizing agent and preparation method thereof

Abstract

The invention discloses a spherical desulfurizing agent and a preparation method thereof. The method comprises the following steps: S1, taking a certain amount of desulfurizing agent, adding a certainamount of inorganic binder and a proper amount of water, preparing the mixture into blocks with moderate strength; and S2, preparing the blocks into spherical particles by using a pill making machine, polishing the particles in the pill making machine, and drying to obtain the finished desulfurizing agent. Preferably, the inorganic binder in S1 is one or more of water glass, alumina sol, zeolitepowder and bentonite. The spherical desulfurizing agent is scientific and reasonable in structure, and safe and convenient to use, the spherical particles have good structural strength and large outersurface area, the contact between gas and effective components of an agent is facilitated, and the desulfurization effect is good. The inorganic binder is used, agent breakage caused by decompositionof an organic binder when the agent is locally overheated is avoided, and the strength of the agent is improved. The spherical particles are good in fluidity, dense filling of a bed layer and combination of the spherical particles and fixed bed equipment are facilitated, conveying and dismounting are convenient, the agent replacement procedure is simplified, and the agent replacement time is shortened.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a spherical desulfurizer and a preparation method thereof. Background technique [0002] Sulfur dioxide produced by coal combustion is mainly removed by flue gas desulfurization; [0003] Flue gas desulfurization technology mainly uses various alkaline absorbents or adsorbents to capture sulfur dioxide in flue gas, and convert it into relatively stable and easily mechanically separated sulfur compounds or elemental sulfur, so as to achieve the purpose of desulfurization; [0004] Flue gas desulfurization technology can be divided into two categories according to the water content of desulfurization agent and desulfurization product: [0005] 1. Wet method, that is, washing with liquid absorbent such as water or alkaline solution (or slurry) to remove sulfur dioxide; [0006] 2. Dry method, using powder or granular absorbent, adsorbent or catalyst to remove sulfur dioxid...

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Problems solved by technology

[0009] When fixed bed desulfurization is used for dry desulfurization, there are certain requirements on the particle size and strength of the desulfurizer. Traditional desulfurizers can be made into rod shapes, clover shapes, etc., but in the process of use, replacement is difficult and the strength is low, which is difficult for dry desulfurization. The application of the

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