At present, the society attaches more and more importance to energy conservation and emission reduction, and the national standard also requires the waste gas temperature of industrial boilers to be controlled within a reasonable range.For the boiler with high heating medium temperature, a secondary heat exchanger must be set up to recover heat so as to reduce the exhaust emission temperature.The secondary heat transfer medium can be water or air.For some industrial production sites, especially the heat conduction oil furnace, can not use hot water, only heating air, so the hot air furnace came into being.
A hot air burner is the hot air needed for a burner, some of it heated to 250 degrees Celsius.Because burners are electromechanical devices, some electrical components require heat resistance.In order to prevent burns and ensure the safety of operators and users, the external surface temperature is not allowed to exceed 50℃. With the change of boiler load, the efficiency of secondary heat exchanger will change, and the temperature of combustion air will fluctuate.Of course, as the temperature changes, so does the density and oxygen content of the air.The burner should be able to adjust the amount of air into the furnace according to the temperature change.Only in this way can the burner run stably under reasonable working conditions.
Existing hot air furnace structure and system is simple.Suitable for low temperature combustion air and low pressure in furnace.Most burners are on-site thermal insulation, which requires a very thick insulation layer to reach a reasonable surface temperature. The appearance is not good, and the adjustment of burners has no automatic intelligent function.
Our company provides a simple structure, easy to use hot air furnace, to solve the above problems, provide the following technical solutions:
The utility model relates to a hot air burner, including a fuel butterfly valve, an air valve, a regulating mechanism assembly, a cooling air inlet and a burner housing.The air valve is installed below the burner housing.The regulator assembly is mounted on the right side of the burner housing.The fuel butterfly valve is installed on the burner shell on the left side of the air valve, and the cold air inlet is installed on the regulating mechanism.The position between the assembly and the burner housing includes an outer shell, an inner shell and asbestos-free aluminosilicate fibre asbestos.Asbestos-free aluminosilicate is located between the outer shell and the inner shell.The burner housing is equipped with an ignition needle device.The ignition needle device includes an ignition needle and a ceramic rod.The ceramic rod is mounted outside the ignition needle.The two ignition pins are connected by connecting the copper sleeve and the fastening screw.The lower part of the ignition needle extends to the burner housing and is connected to the high voltage wire.The bottom of the valve is connected to the valve assembly.The valve assembly includes a valve frame, a valve shaft, a temperature sensor and a servo regulating motor.The valve rack is equipped with disc, valve shaft and temperature sensor.The servo regulating motor is connected with the valve shaft, and the burner housing is also equipped with fire detection insulation sleeve, including flame monitor and heat insulation glass cover.The flame monitor is installed on the burner shell through the installation flange, and the heat insulation glass cover is installed below the flame monitor, which is fixed on the left side of the flame monitor.A combustion head regulating cylinder assembly is provided at the rear of the fuel butterfly valve. The combustion head regulating cylinder assembly includes a pneumatic regulating cylinder, an regulating rod and a mixing head.The air pressure regulating cylinder is located below the burner shell.The left side of the regulating rod is connected with the fuel butterfly valve through the connecting column, and the right side of the regulating rod is connected with the regulating mechanism assembly.Install on the left side of the adjustment bar.
As a further solution, the inner shell is heat-resistant stainless steel and the outer shell is ordinary steel coated with heat-resistant paint.The ceramic bar is lined with nickel chrome wire.
