Method for removing organic sulfur in coal by ultrasonic intensification and citric acid
An ultrasonic and organic sulfur technology, applied in the field of coal desulfurization, can solve problems such as hindering the development and clean utilization of coal, environmental pollution, threats to human health and environmental safety, etc., to achieve the effect of providing desulfurization efficiency, enhancing agglomeration and low cost
Inactive Publication Date: 2018-04-10
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0002] Coal has long been the basic energy of our country, and its resources are abundant. However, a large amount of low-value coal produces sulfide during the combustion process, causing serious environmental pollution, threatening human health and environmental safety, and a large amount of high-sulfur coal is also a great threat It hinders the development and clean utilization of coal, so the development of coal desulfurization technology has important practical significance
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[0054] According to the process conditions set in Table 1, the removal of organic sulfur in coal was carried out by the following method.
[0055] (1) Coal is crushed into coal powder of a certain particle size for subsequent use;
[0056] (2) adding the coal powder in the step (1) in the citric acid solution by a certain mass volume ratio to make coal slurry;
[0057] (3) the coal slurry in the step (2) is placed in ultrasonic waves;
[0058] (4) Suction-filtering and washing the coal slurry treated in step (3) to obtain a coal sample after removal of organic sulfur.
[0059] Each technological parameter in the table 1 embodiment 1~8
[0060]
[0061] The removal rates of organic sulfur in raw coal by the methods in Examples 1-8 are shown in Table 2.
[0062] Table 2 Removal rate of organic sulfur in raw coal after treatment in Examples 1-8
[0063]
[0064] As can be seen from Table 2, the organic sulfur in the raw coal can be removed by the method of the present i...
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Abstract
The invention relates to a method for removing organic sulfur in coal by ultrasonic intensification and citric acid, and belongs to the technical field of coal desulphurization. The method mainly comprises the following steps: crushing the coal into coal powder, then adding the coal powder into a citric acid solution to prepare a coal slurry, placing the coal slurry into an ultrasonic wave, performing ultrasonic treatment, finally performing vacuum filtration on the coal slurry subjected to ultrasonic treatment, and performing washing to obtain an organic-sulfur-removed coal sample. The methodprovided by the invention can effectively improve desulfurization efficiency though optimization of the conditions including of coal particle sizes, ultrasonic power of the ultrasonic wave, ultrasonic time, a reaction temperature and a citric acid concentration; and the method has mild reaction conditions and a simple process, is easy to operate, and can avoid the dangerousness of a desulfurization process, thereby having promotion value.
Description
technical field [0001] The invention belongs to the technical field of coal desulfurization, and in particular relates to a method for removing organic sulfur in coal by strengthening citric acid with ultrasonic waves. Background technique [0002] Coal has long been the basic energy of our country, and its resources are abundant. However, a large amount of low-value coal produces sulfide during the combustion process, causing serious environmental pollution, threatening human health and environmental safety, and a large amount of high-sulfur coal is also a great threat It hinders the development and clean utilization of coal, so the development of coal desulfurization technology has important practical significance. Contents of the invention [0003] In view of this, the present invention provides an ultrasonic-enhanced citric acid desulfurization aid by utilizing the advantages of good directionality of ultrasonic waves, strong penetrating ability, easy to obtain concent...
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IPC IPC(8): C10L9/00C10L9/10
Inventor 刘晋谯自强韩琦原金海张薄吴政阳石晨飞邹瑞庞峥邓世琴
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY