Synchronous flue gas desulfurization and denitrification process and system for coal-fired power plant

A technology for desulfurization, denitrification, and coal-fired power plants, which is applied in the intersection of energy engineering and environmental engineering, and can solve the problems of high operation cost, complicated operation and maintenance, and large construction investment.

Inactive Publication Date: 2015-06-17
武汉慧邦环境工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of desulfurization and denitrification in coal-fired power plants that need to be built separately for desulfurization and denitrification in the current technology, the construction investment is large, the operation and maintenance are complicated, and the operation cost is high. Simultaneous desulfurization and denitrification process and system for coal-fired power plants with low cost, no secondary pollution, and the ability to recycle sulfur and nitrogen resources in flue gas

Method used

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  • Synchronous flue gas desulfurization and denitrification process and system for coal-fired power plant

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Embodiment approach

[0104] According to the process requirement, the specific embodiment of the present invention is as follows figure 2 shown. The entire design process starts from the desulfurization and denitrification tower according to the reverse engineering method, and finally reaches the direct cooler. Each specific design unit also adopts the reverse engineering method, such as desulfurization and denitrification tower starting from the design of high-speed wire mesh eliminator. Design tools that can be used include large-scale commercial computational fluid dynamics software CFD (Computation Fluid Dynamics), plant design management system software PDMS (Plant Design Management System), etc., and required measuring instruments include specific surface meters, flue gas analyzers, ion chromatographs Wait.

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Abstract

The invention discloses a synchronous flue gas desulfurization and denitrification process and system of a coal-fired power plant. The process comprises the following steps: cooling the original flue gas 1 to a certain temperature below 101.88 DEG C to obtain flue gas 2, and introducing the flue gas 2 into a desulfurization and denitrification tower, wherein the flue gas is in sufficiently contact with H2O, dissolved O2, an intermediate product HNO3 and itself attached to the specific surface of foamed ceramic when SO2, NO, NO2 and O2 in the flue gas moves around the pores of the multi-layer foamed ceramic filler, after repeated concatenate chemical reactions, SO2, NO and NO2 in the flue gas are removed, a mixed solution of H2SO4 and HNO3 is separated, and the components of the discharged flue gas 3 are close to normal air components. The system is formed by organically combining a direct cooler, the desulfurization and denitrification tower, a monitoring subsystem and the like. The flue gas desulfurization and denitrification can be simultaneously realized in a set of device (complete equipment), the removal efficiency is high, secondary pollution is avoided, and the mixed solution of chemical raw materials H2SO4 and HNO3 is recovered.

Description

technical field [0001] The invention belongs to the intersection field of energy engineering and environmental engineering, and in particular relates to a simultaneous desulfurization and denitrification process and system for flue gas of a coal-fired power plant. Background technique [0002] Coal-burning pollution is one of the main sources of air pollution in my country. In the primary energy consumption and its composition, coal-burning accounts for about 70%. The largest coal-consuming households in my country are mainly coal-fired power plants. Sulfur dioxide emissions account for about 55% of total industrial emissions, and nitrogen oxide emissions account for about 43% of total industrial emissions. It is estimated that by 2020, my country's northeast, north, southeast regions and the Sichuan Basin SO 2 Emissions reached 30.6 million tons, NO x Emissions amounted to 26.6 million tons. Therefore, reducing and controlling coal combustion, especially coal-fired power ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/60
Inventor 张杰鄢来斌刘秀龙
Owner 武汉慧邦环境工程技术有限公司
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