Urea solution atomizing spray gun

Abstract

The invention relates to a urea solution atomizing spray gun which comprises a first air inlet pipe, a sealing pipe, a liquid inlet pipe, an outer guide pipe, an inner guide pipe, an atomizing block and a spray head, one end of the sealing pipe is connected with the first air inlet pipe, the other end of the sealing pipe is connected with the atomizing block, and the first air inlet pipe and the atomizing block are matched to form a conical cavity; the liquid inlet pipe is communicated with the conical cavity, one end of the outer guide pipe is connected with the atomization block, the other end of the outer guide pipe is connected with the spray head, the inner guide pipe is located in the outer guide pipe, an outer cavity is formed between the inner wall of the outer guide pipe and the outer wall of the inner guide pipe, the second air inlet pipe is communicated with the outer cavity, and the second air inlet pipe is communicated with the spray head. The inner catheter comprises an inner cavity, and the first air inlet pipe and the conical cavity are communicated with the inner cavity. By adopting the Venturi effect, local vacuum appears when compressed air and a urea solution are mixed in the conical cavity, the compressed air is prevented from entering the liquid inlet pipe, and normal use of the urea gun is guaranteed.

Description

technical field [0001] The invention relates to the technical field of atomizing spray guns, in particular to an atomizing spray gun for urea solution. Background technique [0002] The flue gas emitted by power plant boilers contains nitrogen oxides (NOx). NOx is a major air pollutant. NOx and hydrocarbons can cause photochemical pollution under the action of strong light. NOx discharged into the atmosphere forms acid rain. The main reason is that it seriously endangers the ecological environment. Selective non-catalytic reduction flue gas denitrification (SNCR) has become one of the important flue gas denitrification methods because of its simple process and low investment. The principle is that under the action of compressed air, the urea solution is atomized by a spray gun and then sprayed into the high-temperature flue gas in the furnace. The nitrogen oxides in the gas are removed. [0003] The existing urea spray gun uses a physicochemical spray head, and the spray ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a urea solution atomizing spray gun aiming at the problem in the prior art that the atomization of the spray gun needs to be frequently debugged

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