Device for measuring nozzle angles and tangent circles of quadrangular tangential injection burning boiler

Abstract

The invention relates to a device for measuring nozzle angles and tangent circles of a quadrangular tangential injection burning boiler. The device is characterized by comprising a measurement controller, four nozzle laser transmitters and four water-cooling wall range finders, wherein nozzle laser transmitters are installed at injector nozzles to be measured, water-cooling wall range finders are horizontally installed on water-cooling walls corresponding to injector nozzles, and the four nozzle laser transmitters and the four water-cooling wall range finders are connected with the measurement controller in a wireless mode or a wired mode to implement a measurement function. The device has the advantages of being reasonable in design, capable of measuring nozzle angles and calculating combustion tangent circle positions through a laser ranging principle and an optical electronic sensor principle, measuring nozzle angles and sizes of tangent circles of the quadrangular tangential injection burning boiler quickly and accurately, reducing measurement errors and guaranteeing the safety and the reliability of boiler combustion, fast to install, convenient and easy to carry, and simultaneously, nozzle angles and sizes of tangent circles can be directly displayed through a display screen on the controller.

Description

technical field [0001] The invention belongs to the technical field of engineering measurement, in particular to a four-corner tangential circular injection combustion boiler nozzle angle and tangential circle measuring device. Background technique [0002] The four-corner tangentially fired boiler is a boiler that burns pulverized coal, fuel oil, gas, etc. The furnace is square, and injectors (burners) are arranged at the four corners. When burning, the four corners inject fuel at the same time, forming a tangential circle in the middle of the furnace to fully mix and enhance the combustion effect. If the tangential circle of the burner is too small, the airflow will be close to the opposite jet, making the combustion unstable; on the contrary, if the diameter of the tangent circle is too large, the airflow will deflect and stick to the wall, causing the water wall of the boiler to coke; The distribution of flue gas velocity field is uneven, and the difference of flue gas ...

AI Technical Summary

Problems solved by technology

If the tangential circle of the burner is too small, the airflow will be close to the opposite jet, making the combustion unstable; on the contrary, if the diameter of the tangent circle is too large, the airflow will deflect and stick to the wall, causing the water wall of the boiler to coke; The distribution of the velocity field of the flue gas is uneven, and the temperature difference of the flue gas at the cross-section increases, which in turn causes the thermal deviation of the superheated air temperature and the reheated steam temperature

Therefore, if the angle of the nozzle of the four-corner tangential boiler fails to reach the design value, it is easy to stabilize the combustion of the boiler, which will affect the safe operation of the boiler

[0003] How to ensure that the nozzle angle of the boiler burner is consistent with the design during the installation and maintenance of the four-corner tangentially fired boiler is still a problem that cannot be effectively solved in the boiler installation and maintenance.

Especially for boilers undergoing maintenance, only one or several nozzles are replaced. If the adjustment is improper, it is easy to cause the size and position of the boiler combustion circle to be inconsistent with the design, which directly affects the combustion of the boiler.

Today's nozzle adjustment method mainly relies on the method of manually pulling the wire to find the tangent circle to adjust the nozzle, which has a large measurement error and cannot meet the increasingly accurate measurement requirements of today.

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