Method for quickly drying flue gas desulfurization gypsum
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A desulfurized gypsum and fast drying technology, applied in the field of desulfurized gypsum drying, can solve the problems of consumption, large coal or electricity, etc., and achieve the effects of simple production process, energy saving and low dosage
Active Publication Date: 2015-01-28
CHINA PETROLEUM & CHEM CORP +1
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The traditional desulfurization gypsum drying method adopts the method of heating and drying, and usually the pulverized materials are sent to calciner, fluidized bed furnace, rotary kiln, intermittent or continuous casserole and other equipment for heating and drying, which consumes a lot of coal or electricity
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Embodiment 1
[0013] This embodiment includes the following steps:
[0014] (1) Add 1.0% of admixture by weight to desulfurized gypsum. The admixture includes 40% of slag, 10% of quicklime, 2% of clinker, 5% of gypsum, 1% of activator, and the rest is impurities, by weight , the activator is alum and triethanolamine mixed according to the weight ratio of 1:1;
[0015] (2) Stir it evenly, then place it naturally for 3h, 24h, and 48h, and measure the water content of the desulfurized gypsum respectively.
Embodiment 2
[0017] In this embodiment, the admixture is 1.5% by weight, and the admixture includes 60% slag, 20% quicklime, 20% clinker, 15% gypsum, 3% activator, and the rest is impurities, by weight, other embodiments and implementations Example 1 is the same.
Embodiment 3
[0019] In this embodiment, the admixture is 2.0% by weight, and the admixture includes 50% slag, 15% quicklime, 10% clinker, 10% gypsum, 2% activator, and the rest is impurities, by weight, other embodiments and implementations Example 1 is the same.
[0020] The changes in the water content of desulfurized gypsum under different dosages of admixtures in Example 1, Example 2 and Example 3 are shown in Table 1:
[0021] Table 1 Moisture content of desulfurized gypsum at different dosages of admixtures
[0022]
[0023]
[0024] From the analysis in Table 1, the water content of desulfurized gypsum mixed with 1.0% admixture can be reduced to 1.30% after 24 hours of drying, which is already ideal and can be used for subsequent treatment and resource utilization of desulfurized gypsum. Compared with the drying method, the present invention achieves the purpose of rapidly drying the desulfurized gypsum while saving energy and reducing costs.
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Abstract
The invention discloses a method for quickly drying flue gas desulfurization gypsum. The method comprises the following steps: adding 1.0-2.0wt% of an additive into the flue gas desulfurization gypsum, uniformly stirring, and then naturally standing until the flue gas desulfurization gypsum reaches drying requirements. According to the method, industrial waste residue is used as the additive of raw materials, and conventional energy resources do not need to be consumed. The additive is made from industrial waste residues, does not consume conventional energy resources and is simple in production process; since the raw material is the industrial waste residue, resource utilization of the industrial waste residue is achieved, and energy resources are saved simultaneously. By utilizing the method, operation is simple and convenient, the purpose of dewatering can be achieved in natural state, the effect is good, the operation period is short, and the performance of a product can not be changed due to low mixing amount of the additive.
Description
technical field [0001] The invention relates to a method for drying desulfurized gypsum, in particular to a method for rapidly drying desulfurized gypsum. Background technique [0002] Boilers or reaction furnaces used in power plants, thermal power plants or other industrial enterprises use coal as energy source. During the production process, coal combustion produces harmful flue gas containing sulfur, mainly sulfur dioxide. At present, in my country's large-scale environmental protection projects to reduce air pollution and create clear water and blue sky, many large sulfur dioxide emitters are implementing flue gas desulfurization projects, especially coal-fired thermal power flue gas desulfurization. Regardless of whether it is a newly built, rebuilt or expanded power plant and other coal-fired sulfur dioxide emitting enterprises, the limestone-gypsum wet flue gas desulfurization process is more common in the implemented flue gas desulfurization projects. [0003] Desu...
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