Ammonia-process desulfurization process and device

Abstract

The invention discloses an ammonia-process desulfurization process and device. The ammonia-process desulfurization process comprises the following steps: introducing high-sulfur calcinations flue gas into ammonia water, controlling the temperature to about 110 DEG C when the high-sulfur calcinations flue gas enters a desulfurization tower so as to react with an ammonia water solution, absorbing SO2 in the flue gas by the ammonia water, and removing SO2. An ammonia-process desulfurization device comprises an oxidization section, wherein a concentration section is arranged above the oxidization section; an absorption section is arranged above the concentration section; a chimney is arranged above the absorption section; the concentration section comprises a tube side and a shell side, wherein the absorption section communicates with the shell side of the concentration section; the absorption section mutually communicates with the oxidization section; the oxidization section communicates with the concentration section; and the tube side of the concentration section communicates with a post-treatment system. With the adoption of the technical scheme, SO2 outlet concentration is reduced; and the ammonia-process desulfurization process is used, so that SO2 inlet concentration of the flue gas is 18000 mg / Nm<3>, and outlet concentration is 50 mg / Nm<3> or lower.

Description

technical field [0001] The invention relates to the technical field of calciner flue gas desulfurization, in particular to a [0002] Ammonia desulfurization process and device for furnace flue gas desulfurization. Background technique [0003] High temperature calciner flue gas contains SO 2 High concentration, SO 2 Concentration up to 18000mg / Nm 3 -42800 mg / Nm 3 At present, the commonly used desulfurization technology cannot meet the national standard. After investigation, demonstration and test, ammonia desulfurization can meet the national standard. [0004] The existing desulfurization processes such as the calcium method and the double-alkali method have low desulfurization efficiency and cannot meet the emission standards for environmental protection in 2020. Contents of the invention [0005] The technical problem to be solved by the present invention is to provide a method capable of realizing high-concentration SO 2 The effective desulfurization process rea...

AI Technical Summary

Problems solved by technology

[0003] High temperature calciner flue gas contains SO 2 High concentration, SO 2 Concentration up to 18000mg / Nm 3 -42800 mg / Nm 3 At present, the commonly used desulfurization technology cannot meet the national standard. After investigation, demonstration and test, ammonia desulfurization can meet the national standard.

[0004] The existing desulfurization processes such as calcium method and double alkali method have low desulfurization efficiency and cannot meet the emission standards of environmental protection requirements in 2020

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