System and method for wet flue gas desulfurization and oxidation monitoring in cooperation with sulfur mixing and blending combustion of thermal power plant

Abstract

The invention discloses a system and method for wet flue gas desulfurization and oxidation monitoring in cooperation with sulfur mixing and blending combustion of a thermal power plant, and belongs to the technical field of sulfur mixing and blending combustion of thermal power plants. The system comprises an absorption tower for desulfurization reaction, an SO2 inlet pipe, a boiler and a slurry oxidation analyzer, wherein the SO2 inlet pipe is arranged on the outer side of the absorption tower, an SO2 outlet is formed in one side of the upper end of the absorption tower, and detection equipment is arranged at the SO2 outlet; the boiler is arranged at the upstream of the absorption tower, a flue gas channel of the boiler communicates with the SO2 inlet pipe, and a furnace coal quality analyzer is arranged at the upstream of the boiler; and the slurry oxidation analyzer is arranged at the downstream of the absorption tower. According to the system, the sulfur mixing and blending combustion function is integrally guided by desulfurization, so that the desulfurization potential is excavated to the maximum extent, the actual desulfurization maximum output is found out, the sulfur content of fire coal can be further increased from a design value and determined by a blending combustion experiment, the purchasing range of the coal coming market of a power plant is enlarged, the adaptability and diversity of the fire coal are improved, economic coal with higher sulfur content is purchased, and the power generation cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of sulfur mixed combustion in thermal power plants, and in particular relates to a system for monitoring wet flue gas desulfurization and oxidation in cooperation with thermal power plants. Background technique [0002] Green development and ecological civilization have become the strongest voice and main theme of today's era. In response to the grand goal of "3060" carbon peak and carbon neutrality put forward by the country, traditional thermal power plants are facing an urgent need for transformation and upgrading. It has become a development trend to reduce the cost of power generation, enhance the core competitiveness of enterprises, improve the intelligent level of power plants, save energy and increase the contribution to environmental protection. [0003] Sulfur-mixed combustion reduces power generation costs from the source due to problems such as miscellaneous coal sources, multiple types of coal, ...

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Problems solved by technology

[0003] Sulfur-mixed combustion can reduce power generation costs from the source due to problems such as miscellaneous coal sources, multiple types of coal, and deviation from design values, but manual and extensive sulfur-mixed combustion cannot simultaneously meet multiple requirements such as system safety, economy, and environmental protection.

[0004] More than 90% of domestic thermal power plants adopt limestone-gypsum wet desulfurization process. The wet desulfurization process is divided into four stages: absorption, neutralization, oxidation and crystallization. The wet desulfurization process generally has control methods for absorption, neutralization and crystallization, but The problem of uncontrolled oxidation leads to the inability to measure and control the oxidation process, the adjustment of oxidation air volume and the centralized sharing of air distribution and other technical gaps that cannot be filled. Only by solving the problem of precise monitoring of desulfurization and oxidation can the energy-saving optimization and upgrading of desulfurization and oxidation air and mixed sulfur blending be realized. Synergetic control, truly play the role of synergistic desulfurization guidance mixed sulfur blending control, improve the safety, energy saving, and automatic operation level of the desulfurization system, thereby producing greater economic and environmental effects

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