Magnesium oxide flue gas desulfurization and outgrowth thick-slurry method oxidation reclaim process

A technology of magnesium oxide and magnesium oxide powder, which is applied to chemical instruments and methods, magnesium sulfate, separation methods, etc., can solve the problems of high energy consumption and large liquid volume, and achieve small equipment investment, high efficiency, and facilitate transformation Effect

Inactive Publication Date: 2007-09-05
TSINGHUA UNIV +1
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  • Abstract
  • Description
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Problems solved by technology

Oxidation in the circulating liquid pool (that is, the oxidation tank), because of the large amount of liquid, the energy consumption is also large

Method used

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  • Magnesium oxide flue gas desulfurization and outgrowth thick-slurry method oxidation reclaim process
  • Magnesium oxide flue gas desulfurization and outgrowth thick-slurry method oxidation reclaim process
  • Magnesium oxide flue gas desulfurization and outgrowth thick-slurry method oxidation reclaim process

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] As shown in Figure 2 and Figure 3, the sulfur-containing flue gas from the boiler after electrostatic precipitator is cooled by the flue gas reheating device 4, and then enters the pre-washing tower 1 for pre-purification and cooling. The pre-washed flue gas enters the SO 2 The absorption tower 2 desulfurizes, and then passes through the mist removal device 3 and the flue gas reheating device 4, leading to the chimney to be emptied. The magnesia powder used as desulfurization agent is first mixed with circulating absorption liquid in the magnesia slurry mixing tank 5, and a small stream of high-pressure fluid is drawn from the outlet side of the circulating pump 12 and enters tangentially from the bottom side of the slurry mixing tank to form and stir the paddles. The upward swirling flow rotating in the same direction does not cause deposition under the blad...

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Abstract

The dense-slurry recovery technique for flue gas desulphurization by magnesia comprises: during the process, separating and leading out the dense slurry liquid, blasting air, heating and adjusting the temperature by steam to oxidize the MgSO3 dense slurry as one-time desulphurized product into MgSO4 with concentration achieved industrial level; filtering, crystallizing, and extracting the coarse grain MgSO4.7H2O. This invention is reliable with low cost and high value with the product, even has the yield effect super to industrial production for MgSO4.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization and product resource utilization, in particular to MgSO, a primary product of magnesium oxide desulfurization 3 Thick slurry oxidation and oxidation product MgSO 4 recycling process. Background technique [0002] Wet flue gas desulfurization technology is to control SO 2 The main technical means to discharge and control acid rain pollution. In particular, limestone / gypsum flue gas desulfurization has become the leading technology for boiler flue gas desulfurization at home and abroad. This technology is not compatible with the national conditions of our country, which is rich in ore gypsum. The problem that the disposal of desulfurized gypsum has become a heavy burden for enterprises has been revealed, and the desulfurization operation cost is also high. Aiming at the existing problems of the limestone / gypsum method, combined with the national conditions of my country, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D53/80C01F5/40
Inventor 徐康富马永亮刘玉同张战朝
Owner TSINGHUA UNIV
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