A dual-purpose burner for coal and gas with uniform flow and anti-wear twisted blades

Abstract

The invention discloses a coal and gas dual-purpose burner with flow sharing wear-resistant twisted blades. The coal and gas dual-purpose burner comprises a precombustion chamber arranged on the periphery of an outer secondary air sleeve of the burner and defined by a precombustion chamber shell. The outer side of the precombustion chamber shell is sleeved with an SOFA air sleeve. Convergent SOFAair axial rotational flow blades are arranged at an outlet of the SOFA air sleeve. When the coal and gas dual-purpose burner is used as a pulverized coal burner, the SOFA air axial rotational flow blades enable sprayed SOFA air to form outward diffusion high-speed rotating jet flow around the axis of an outlet of the precombustion chamber. The SOFA air is burned under the condition of MILD combustion, and the formation amount of NOx is remarkably reduced. When the coal and gas dual-purpose burner is used as a gas burner, gas sprayed from gas premixing spray nozzles is rapidly mixed with gas combustion air in a gas premixing channel. High-speed jet inner and outer secondary air entrains a great deal of high-temperature flue gas to flow back. Gas, air and flue gas are dispersed and mixed ina stove chamber and are burned under the MILD condition. The formation amount of NOx is effectively reduced.

Description

【Technical field】 [0001] The invention belongs to the technical field of thermal energy and power engineering, and relates to a swirling flow burner, in particular to a coal and gas dual-purpose burner with uniform flow anti-wear twisted blades. 【Background technique】 [0002] Fossil energy will be the main body of energy consumption in my country for a long time to come. In recent years, the proportion of natural gas consumption in total energy consumption has been increasing year by year. Combustion of fossil fuels produces nitrogen oxides (NO x ), the main source of NO x It is one of the main causes of photochemical smog, acid rain, and haze weather, and seriously endangers the atmospheric environment and human health. [0003] Pulverized coal pre-combustion is a method that can effectively reduce NO in the combustion process. x generated technology. Before entering the burner, the primary air carries the pulverized coal through the pre-combustion chamber heated by an...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the single air classification technology in the prior art to NO x The problem of limited emission reduction effect, providing a compact structure, used to enhance the adaptability of the burner to the type of fuel and reduce the NOx in the combustion process x The generated coal and gas dual-purpose burner with uniform flow and anti-wear twisted blades

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