Hollow conical rotational flow flame low-nitrogen gas burner

Abstract

A hollow conical rotational flow flame low-nitrogen gas burner comprises a volute unit and a burning head unit. The volute unit comprises an air inlet and an air outlet, the air inlet is formed in the head of the volute unit, the air outlet is formed in the side face of the volute unit, and a throat ring is arranged at the air outlet. The burning head unit comprises a distributor, nozzles and a cone frustum, the distributor is installed in the throat ring, a mixing area is formed between the circumferential face of the distributor and the inner wall of the throat ring, the distributor is provided with an inner cavity, and the inner side end face of the distributor communicates with a gas inlet. Each nozzle is provided with an opening end and a gas outlet, the multiple nozzles are evenly distributed and installed on the circumferential face of the distributor, the opening ends communicate with the inner cavity, a gas cavity is formed between the opening ends and the closed ends, and the gas outlets communicate with the gas cavity and are arranged towards an opening of the throat ring. The small end face of the cone frustum is connected with the outer side end face of the distributor, the large end face of the cone frustum is arranged outwards, a hollow conical rotational flow flame area is formed between the large end face and the opening of the throat ring, and a smoke backflow area is formed by a hollow inner cavity of the cone frustum.

Description

technical field [0001] The invention belongs to the technical field of gas low-nitrogen combustion, and in particular relates to a hollow conical swirling flame low-nitrogen gas burner. Background technique [0002] Nitrogen oxides are one of the main sources of air pollution, and the national emission standards for nitrogen oxides produced by combustion are becoming increasingly stringent. At present, the mainstream technical means to control NOx emissions from gas burners include flue gas external circulation (FGR), fully premixed surface combustion and other methods. Among them, the flue gas external circulation (FGR) technology generally extracts the flue gas from the tail flue gas outlet, mixes it with the primary air, and sends it into the furnace by the combustion fan. Due to the decrease of oxygen concentration after mixing and the corrosion of condensed water in the flue gas, there are generally disadvantages such as unstable combustion, high CO content, easy to ge...

AI Technical Summary

Problems solved by technology

The volute and the mixing cylinder of this application are also connected by a connecting cylinder, the structure is complex, and the center temperature is too high during combustion, which is easy to generate thermal nitrogen oxides

Images