Multifunctional nozzle used for wet desulphurization and dust removal of industrial flue gas

Abstract

The invention discloses a multifunctional nozzle used for wet desulphurization and dust removal of industrial flue gas and aims to provide a nozzle integrating three functions of liquid injecting, self-cleaning and nozzle opening clearance adjusting outside a tower. The nozzle comprises a shell and is characterized in that an adjusting rod is arranged in the shell; one end of the adjusting rod is provided with a rack meshed with a gear, and the other end of the adjusting rod is conical; a partition board for partitioning the shell into an upper cavity and a lower cavity and a seal ring are arranged in the shell; and a transmission shaft penetrates through the gear so as to be connected with a bearing in the shell. The adjusting rod can pass through the center holes of the partition board and seal ring and can move up and down under the control of the transmission shaft. The nozzle is provided by the invention mainly applicable to a wet desulphurization and dust removal system for industrial flue gas.

Description

technical field [0001] The invention relates to a multifunctional nozzle, in particular to a multifunctional nozzle used for industrial flue gas wet desulfurization and dust removal. Background technique [0002] At present, there are mainly two types of nozzles used in the wet desulfurization process: one is the spiral nozzle, and its material is mainly alloy, silicon carbide, and ceramics. Domestic joint ventures imitate the production. At present, professional production enterprises can mass-produce products of different specifications, which can meet the system requirements of large and medium-sized desulfurization equipment. The nozzle uses two sets of pipes with different inner and outer diameters, and a ring-shaped baffle is installed at the outlet end, so that the desulfurization liquid under pressure between the two walls splashes in the gap between the ring-shaped baffles, forming a 360-degree "water umbrella" "shape. The two types of nozzles have their own chara...

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Problems solved by technology

The two types of nozzles have their own characteristics, but they have a common disadvantage: when the inlet pipe of the upper tower of the desulfurization liquid has no filter screen or the filter screen fails, solid impurity particles are easily brought to the nozzle when the liquid flows, forming local blockage, resulting in The liquid at the outlet of the nozzle diffuses unevenly, and a "liquid film cavity" is formed between the desulfurization liquid sprayed downward from the upper part of the absorption tower and the flue gas moving upward from the bottom inlet of the absorption tower. Through the desulfurization reaction section of the absorption tower, the desulfurization efficiency is directly reduced

According to practical experience, the interval time of crystallization on the wall surface can be prolonged by changing the material of the pipeline, appropriately increasing the liquid-gas ratio, rationally designing the slope of the pipeline, and controlling the flow rate. At present, it is still made of stainless steel, and the CaCO in the nozzle gap and between the inner layers 3 Crystallization occurs from time to time

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