Pretreatment method and device for effectively absorbing escape ammonia in smoke

Abstract

The invention relates to a pretreatment method and device for effectively absorbing escape ammonia in smoke. The device comprises an absorption pool, an atomizing absorption tee, a smoke inlet pipe, an absorption liquid injection pipe, an absorption liquid circulating pump, a circulating electromagnetic valve, a high-temperature heat tracing system and absorption liquid. The pretreatment method and device can avoid the problems that the ammonia in the smoke reacts with sulfur dioxide to form ammonium bisulfate and is coagulated with dust to attach the pipe wall, resulting in the decreased ammonia concentration in the smoke and unrepresentative measurement data. The ammonia in the smoke can be maximally dissolved in the absorption liquid, so that the problems such as crystallization and adhesion of the ammonia gas can be avoided. The ammonia in the smoke can be completely transferred into the absorption liquid, and the concentration of the escaping ammonia in the smoke can be calculated by measuring the concentration of ammonia salts in the absorption liquid, so that the precision in measurement can be realized.

Description

technical field [0001] The invention specifically relates to a pretreatment method and device for effectively absorbing escaped ammonia in flue gas. Specifically, the invention relates to a pretreatment device and method for transferring flue gas escape ammonia from a gaseous state to a liquid state. Background technique [0002] Flue gas denitrification technology is one of the main methods to control nitrogen oxide emissions in my country. At present, selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) with mature technology are mostly used at home and abroad for flue gas denitrification. [0003] These two methods all need to spray the reducing agent ammonia into the flue gas to reduce the nitrogen oxides in the flue gas to nitrogen. In order to ensure the full reaction of nitrogen oxides and avoid new pollution caused by excessive ammonia, real-time monitoring and analysis of escaped ammonia is required to optimize the injection amount of r...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides an on-line pretreatment device and method for escaped ammonia, which can transfer the ammonia in the flue gas from the gaseous state to the liquid state after treatment, and solve the problem of ammonia gas itself. Unstable, easy to condense and adsorb, resulting in unrepresentative samples

At the same time, the measurement of ammonia in liquid is also much easier, which solves the problem of accurate measurement of ammonia

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