Premixed secondary flame fired civil boiler with furnace basin

Abstract

The invention relates to a premixed secondary flame injection and combustion civil boiler with a furnace basin. The furnace body of the boiler is located at the lower part of the heat exchange tube and is provided with an upper furnace basin bracket whose periphery is fixed on the furnace wall. The upper opening of the upper furnace basin bracket supports the upper furnace basin of the combustion chamber, and the lower basin of the upper furnace basin of the combustion chamber The lower furnace basin of the combustion chamber containing fuel coal is hooked to the opening, and the wall of the lower furnace basin of the combustion chamber is provided with a number of circumferentially distributed upper air inlet holes in the combustion chamber, and the lower end is a furnace grate with a number of lower air inlet holes; The top of the above-mentioned heat exchange tube is covered with a flame vent side cover, the inner circumference of the flame vent side cover is covered with a conical reflector, and the lower cover of the reflector is provided with a flame vent cover that can cover the flame vent The positive pressure combustion chamber is below the reflector cover and the burner cover, and the reflector cover, the burner cover and the upper furnace cover form a negative pressure combustion chamber, and the negative pressure combustion chamber and the smoke exhaust port arranged on the body of heater connected. Since the boiler is structurally configured as a positive pressure combustion chamber and a negative pressure combustion chamber, it can save coal by 30%; and when cleaning the coal ash, it will not pollute the indoor environment.

Description

technical field [0001] The present invention is mainly a secondary premixed pressurized vortex clean combustion boiler with electronic control developed to solve the current air pollution and haze weather, specifically a coal-burning and various biomass fuel boiler with both heating and cooking functions. Premixed secondary flame-fired civil boilers for furnace basins. Background technique [0002] Most of the various small civil boilers in the prior art are based on natural methods. In terms of combustion methods, there are no more intervention measures such as pressurized combustion, oxygen-increased disturbance, etc., resulting in insufficient combustion and low temperature in the combustion chamber. , is not conducive to the heat exchange of boilers, and the requirements for coal are relatively high when coal is used as fuel, and lump coal must be burned. At present, the average temperature of the combustion chamber of small civil boilers is only 600 degrees. During the ...

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Problems solved by technology

[0002] Most of the various small civil boilers in the prior art are based on natural methods. In terms of combustion methods, there are no more intervention measures such as pressurized combustion, oxygen-increased disturbance, etc., resulting in insufficient combustion and low temperature in the combustion chamber. , is not conducive to the heat exchange of boilers, and the requirements for coal are relatively high when coal is used as fuel, and lump coal must be burned. At present, the average temperature of the combustion chamber of small civilian boilers is only 600 degrees. During the combustion process, a large amount of unburned Coal gas and particles are discharged into the atmosphere, which not only wastes coal, but also pollutes the air, especially when people commonly call it a furnace, and the pollution is even more serious. According to estimates, the average unburned heat loss of the current small civil boilers reaches 15%. , because the furnace temperature is low and the working hours are long, in the process of flue gas circulation, the heat taken away accounts for 35% of the total calorific value, the coal combustion is not sufficient, and the coal tar produced hangs on the cold water wall of the boiler, making the boiler conduct heat The limitation further reduces the thermal efficiency of the boiler, and there are many shortcomings such as heavy dust and slow cooking. While the boiler is burning, liquefied gas or electricity must be used for cooking, which increases emissions, especially in northern China, especially In the surrounding areas of the city, bungalows still occupy a considerable proportion. The smog weather is directly related to the heating of small boilers. In the area where bungalows gather, the air pollution is the most serious in the morning and evening, so the current small boilers for civilian use are in urgent need of improvement.

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