A premixed graded strong swirl low pollution liquefied gas burner

Abstract

The invention discloses a premixed and graded strong-swirl low-pollution liquefied gas combustor. A porous mixing plate premixing and center grading structure is adopted. The combustor is composed of a combustion chamber box, an air pipeline, a fuel gas pipeline, a porous mixing plate, a main-combustion-grade nozzle and a precombustion-grade nozzle. The air pipeline can be connected with an inlet of the combustion chamber box in a welded mode and is used for guiding air to pass through a swirl combustor and enter a combustion chamber for combustion; the air pipeline can also be directly inserted in a refractory brick hole and sealed with refractory mortar or other materials. Fuel enters the combustor through the fuel gas pipeline and distributed at the porous mixing plate, one part of the fuel and air are fully mixed at an air outlet panel of the porous mixing plate and enter the main-combustion-grade nozzle and the precombustion-grade nozzle respectively, and the other part of the fuel directly enters a precombustion-grade pipeline and then enters the precombustion-grade nozzle. By means of the porous mixing plate structure, the fuel and air can be fully mixed; by means of the premixed and graded strong swirl structure, the downstream combustion area can be easily increased, the heating zone can be easily enlarged, the combustion efficiency is improved, and pollution can be reduced.

Description

technical field [0001] The invention relates to a swirl burner, in particular to a premixed graded strong swirl low-pollution liquefied gas burner. Background technique [0002] Since the 1990s, the world's energy shortage and environmental pollution have become more and more serious, and combustion is still one of the main forms for human beings to obtain heat and power. [0003] As an important thermal power equipment, industrial furnaces are widely used, including industrial metallurgy, construction, chemical industry, and waste heat utilization. The total amount of industrial furnaces in my country is huge, and industrial furnaces consume a lot of energy, have low efficiency, and emit a large amount of pollutants. The annual fuel consumption of industrial furnaces in my country is about 400 million to 500 million tons of standard coal. At the same time, industrial furnaces emit a large amount of solids into the atmosphere. Particulate matter and gaseous pollutants. Liqu...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a swirl burner that can provide a larger heating range, stability, and low pollution in view of the shortcomings of the existing swirl burner, such as small combustion range, small heating area, instability, and high pollutant discharge. The flow burner adopts the center staged swirler structure to give full play to the advantages of the pre-combustion stage for ignition and flame stability, and the porous mixing plate can strengthen the mixing process of fuel and air, and the mixed gas enters the main combustion stage and the pre-combustion stage respectively. Stage combustion can effectively improve combustion efficiency and reduce air pollution; the main combustion stage structure of the central stage cyclone is designed as a strong swirl structure, which can effectively increase the opening angle of the premixed gas diffused downstream and increase the combustion range , while the ignition effect of the double-layer pre-combustion stage flame on the main combustion stage premixed gas can effectively solve the ignition problem of the main combustion stage

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