Loop swirl-flow premixed short-flame injection burning device

Abstract

The invention relates to a loop swirl-flow premixed short-flame injection burning device, which can effectively solve the problem of rapid mixing of swirl flow of the gas and air in an annular channel, effectively reduces the excess air coefficient and improves the burning temperature and burning intensity. The burning device is of a cylindrical bottom opening structure with a ball roof and comprises a cylindrical wall body and a hemispherical vault which together form a precombustion chamber structure in which the airflow is in rotary burning. Premixed airflow nozzles with a rectangular cross section are annularly distributed on the inner wall of the cylindrical wall body and enter the precombustion chamber in rotary-cut angles of 1-60 degrees, the other ends of the nozzles are communicated with a distributing and premixing loop arranged in a cylinder body for airflow injecting, the distributing and premixing loop for airflow injecting is communicated with a gas inlet pipe and an air inlet pipe symmetrically arranged, and diversion stop blocks are arranged at the connecting parts of the two inlet pipes and the distributing and premixing loop for airflow injecting. The burning device effectively solves the problems of unstable burning, low burning intensity and low burning temperature of the low caloric value gas.

Description

1. Technical field [0001] The invention relates to a gas fuel combustion device, in particular to a ring swirl premixed injection short-flame combustion device, which is used as a combustion device in industrial heating hot blast stoves and industrial kilns. 2. Background technology [0002] The burner is an indispensable core device for combustion furnace equipment. Whether its performance and structure are good or not directly affects the fuel utilization rate, thermal efficiency of the furnace, and whether it meets the requirements of energy conservation and environmental protection. At present, as far as various burners burning low calorific value gas (such as blast furnace gas and producer gas) are concerned, their mixed combustion modes can be divided into diffusion combustion (long flame combustion), semi-premixed combustion, and premixed combustion (short-flame combustion). Flame combustion) three forms, and the corresponding burner structures are also different, suc...

AI Technical Summary

Problems solved by technology

However, looking at the existing gas burners, there are still problems such as complex burner structure, uneven distribution of combustion airflow, and poor controllability of combustion airflow. However, some producer gas burners used in industrial furnaces still use The burner with a simple structure leads to low combustion intensity, disordered air distribution, poor mixing of gas and air, etc., resulting in incomplete combustion or unstable combustion, and poor thermal load regulation performance.

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