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Calcium sulfite oxidation reaction stimulation apparatus and method thereof

A calcium sulfite, oxidation reaction technology, applied in chemical instruments and methods, separation methods, calcium/strontium/barium sulfate and other directions, can solve problems such as the inability to fully apply engineering practice, and achieve the effect of easy operation and improved work efficiency

Inactive Publication Date: 2015-02-11
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The initial state of the reaction and the control of the reaction process are different from the actual project. The initial concentration of calcium sulfite is high. As the experiment progresses, the concentration of calcium sulfite gradually drops to close to zero, which is inconsistent with the actual situation of the project. The test results are not accurate. fully applied to engineering practice

Method used

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  • Calcium sulfite oxidation reaction stimulation apparatus and method thereof

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Effect test

Embodiment 1

[0050] In a thermal power plant, three 220t / h boilers adopt the limestone-gypsum desulfurization process. The same limestone slurry as the project is prepared with this experimental device to simulate the oxidation reaction of calcium sulfite, and the optimal calcium sulfite oxidation parameter is obtained: slurry pH Value 5.8, oxygen sulfur ratio 2.8, slurry temperature 50°C, slurry residence time 16h, stirring intensity 0.1kw / m 3 , Applying the parameters obtained from the experiment to the design and operation, the desulfurization system can operate continuously and stably, the concentration of sulfite in the tower kettle is 0-7mmol / L, and the purity of gypsum is 96-99.2%.

Embodiment 2

[0052] A self-provided power plant of an enterprise, two 300MW units adopt the calcium carbide slag-gypsum desulfurization process, use this experimental device to prepare the same calcium carbide slag slurry as the project to simulate the oxidation reaction of calcium sulfite, and the optimal calcium sulfite oxidation parameters are obtained as : The slurry pH value is 6.0, the oxygen sulfur ratio is 3.3, the slurry temperature is 50°C, the slurry residence time is 18h, and the stirring intensity is 0.1kw / m 3 , Applying the parameters obtained from the experiment to the design and operation, the desulfurization system can operate continuously and stably, the concentration of sulfite in the tower kettle is 0-1.25mmol / L, and the purity of gypsum is 94.5-98.5%.

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Abstract

The invention discloses a calcium sulfite oxidation reaction stimulation apparatus and a method thereof. The apparatus comprises: a constant temperature water-bath pot; a reaction tank placed in the constant temperature water-bath pot, and a first stirrer positioned in the reaction tank; an aeration device, a sulfur dioxide inlet device and a pH meter which are connected to the reaction tank; a slurry inlet device communicated with the bottom of the reaction tank; a slag discharge device communicated with the upper portion of the reaction tank; and a central controller connected with the sulfur dioxide inlet device and the pH meter. The device and the method have the advantages of simple operation, accurate test result, and direct application to the engineering practice.

Description

technical field [0001] The invention relates to the simulation experiment field of calcium sulfite oxidation reaction, in particular to a simulation device and method for calcium sulfite oxidation reaction. Background technique [0002] In recent years, with the continuous increase of national environmental protection efforts, the flue gas desulfurization technology of thermal power plants has developed rapidly. Among the many flue gas desulfurization technologies, wet flue gas desulfurization has become a desulfurization method for large-scale commercial application at home and abroad due to its advantages of high desulfurization efficiency, small equipment, low investment, easy control and small footprint. According to statistics, wet flue gas desulfurization accounts for 85% of the total installed flue gas desulfurization capacity of power plants in the world, especially Japan accounts for 98%, the United States accounts for 92%, and Germany accounts for 90%. Wet desulfu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50C01F11/46
Inventor 莫建松周觅夏纯洁吴忠标
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH