A method for desulfurization and denitrification

Abstract

The invention discloses a desulfurization and denitrification method. A system adopted in the method comprises a tower, wherein a flue gas inlet is arranged at the lower part of the tower, an oxidation section corresponding to the lower position of the flue gas inlet is arranged in the tower, and a concentration section, an absorption section, a purification and washing section and a demisting section corresponding to the upper position of the flue gas inlet are sequentially arranged in the tower. The invention further discloses the desulfurization and denitrification method of the desulfurization and denitrification system. The desulfurization and denitrification system is ingenious and reasonable in structural design, the problem of the high operation cost is effectively solved, the technology is stable, absorption and concentration crystallization are operated as a whole, no waste liquor is emitted, ammonia escape emission is limited, and the problems of ammonia escape and aerosol are thoroughly solved. The desulfurization and denitrification method has simple technological steps, realizes desulfurization and denitrification effects, has the characteristics of high desulfurization and denitrification efficiency, energy saving, environment friendliness, low cost and operation safety and stability, can turn waste into wealth and is a key direction of environment-friendly desulfurization development in future.

Description

[0001] This application is a divisional application of a Chinese invention patent application filed on December 3, 2013 with the application number 201310634675.7 and the invention name is a desulfurization and denitration system and a desulfurization and denitration method thereof. technical field [0002] The invention belongs to the technical field of desulfurization and denitration, and in particular relates to a desulfurization and denitration system and a desulfurization and denitration method thereof. Background technique [0003] The integrated technology of desulfurization and denitrification widely used at home and abroad today is mainly the combination of wet flue gas desulfurization and selective catalytic reduction or selective non-catalytic reduction technology. Wet flue gas desulfurization is commonly used calcium method using lime or limestone, and the desulfurization efficiency can reach 90%. The disadvantage is that the project is huge, the initial investmen...

AI Technical Summary

Problems solved by technology

The disadvantage is that the investment in process equipment is large, the flue gas needs to be preheated, and the equipment is easy to corrode, etc.

Moreover, the process is complicated, the cost is high, and the operation is difficult, so it is difficult to widely popularize and apply

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