A static air mixer

Abstract

This application discloses a static air mixer, which uses a Venturi structure to introduce return air and combustion-supporting air, and under the action of the Venturi effect, the two are completely mixed and kept in a state of complete confluence at all times, with the help of spiral air mixing Channel, so that the airflow is continuously kneaded and mixed to achieve the effect of uniform mixing, reducing the oxygen content and output, using the Venturi structure to introduce the return air and combustion air, and completely mix the two under the action of the Venturi effect , and keep completely confluent at all times, cooperate with the spiral air mixing channel, so that the airflow is continuously kneaded and mixed, so as to achieve the effect of uniform mixing to reduce the oxygen content and output.

Description

technical field [0001] The present application relates to a static air mixer. Background technique [0002] In actual engineering implementation, we often encounter the situation of exhaust gas redistribution, which is to mix the exhaust gas with low oxygen content after combustion into the combustion air in proportion to reduce the oxygen content of the combustion air, and reduce the temperature of the combustion chamber to reduce the thermal type. The production of nitrogen oxides, which is commonly referred to as low-nitrogen combustion, requires that the exhaust gas be evenly mixed with the combustion air in proportion to effectively reduce the production of NOx. [0003] The inventors found that the redistribution rate of exhaust gas required by low-nitrogen combustion generally accounts for 15-20% of the exhaust air, which is generally pressurized by the booster fan and then merged into the main pipeline of the combustion-supporting air; but if it is directly imported,...

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Problems solved by technology

[0003] The inventors found that the redistribution rate of exhaust gas required by low-nitrogen combustion generally accounts for 15-20% of the exhaust air, which is generally pressurized by the booster fan and then merged into the main pipeline of the combustion-supporting air; but if it is directly imported, the two streams of air will interfere with each other , due to the inconsistent pressure, it is difficult to meet the requirement of completely inflowing in proportion. Even if the pressure is adjusted to balance the inflow as much as possible, it is difficult to achieve complete inflow and maintain a complete inflow state due to the fluctuation of the pressure head of the centrifugal fan; figure 1 The traditional mixing method shown will flow in a laminar flow mode after mixing and cannot be mixed uniformly with the combustion air. Due to the fluctuation of the return air flow and the inhomogeneity of the flow field, the effect of low-nitrogen combustion will be greatly reduced, and it is difficult to effectively reduce The generation of NOx cannot meet the needs of low-nitrogen combustion

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