Complete desulfurization system of small boiler

Abstract

The invention relates to a complete desulfurization system structure and layout of a small boiler. The invention aims at providing a complete desulfurization system of a small boiler, which prevents congestion during the discharge of slurry in an absorption tower, reduces the power consumption and reduces the occupied space. The system comprises an absorbent preparation system and an SO2 absorption system, wherein the SO2 absorption system comprises an absorption tower, a demister is arranged in the absorption tower, the SO2 absorption system comprises a sedimentation tank, the sedimentation tank is connected with the absorption tower by a siphon pipeline of which middle segment is bent upward, a siphon inlet end of the siphon pipeline is connected to a lower part of the absorption tower, and a siphon outlet end of the siphon pipeline is located above the sedimentation tank. According to the complete desulfurization system provided by the invention, the slurry in the absorption tower is discharged by a pipeline via the principle of pressure difference and siphon without consuming power, the blockage of the pipeline is also prevented in the process, and as the siphon pipeline is bent upward, the occupied space is reduced as well.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to the improvement of the structure and arrangement of a complete set of desulfurization system for a small boiler. Background technique [0002] Desulfurization flue gas desulfurization--the process of removing sulfur and compounds in flue gas, mainly referring to SO in flue gas 3 , SO 2 . to meet environmental requirements. Post-combustion desulfurization, also known as flue gas desulfurization (FGD for short), in FGD technology, can be divided into the following five methods according to the type of desulfurizer: CaCO 3 (limestone) based calcium method, MgO based magnesium method, Na 2 SO 3 Sodium-based method to NH 3 Ammonia-based method, organic alkali method based on organic alkali. The calcium method is the limestone-gypsum wet flue gas desulfurization process. [0003] The limestone-gypsum wet flue gas desulfurization process has undergone decades of prod...

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Problems solved by technology

[0005] The miniaturization of limestone-gypsum wet flue gas desulfurization equipment is increasing. In small limestone-gypsum wet flue gas desulfurization equipment, the slurry in the absorption tower will be discharged from the absorption tower. The existing limestone-gypsum wet flue gas In the desulfurization equipment, the slurry after the reaction is discharged by the slurry pump; the other is discharged from the absorption tower along the groove or ordinary pipeline to the slurry tank by its own gravity, which often causes the groove or pipeline to be blocked. Generally, the grooves or pipelines used are long, occupying a large space, and the recovered slurry will be deposited in the slurry tank, which brings problems to the maintenance and cleaning of the slurry tank

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