Top blowing and lower combustion type boiler

Abstract

The invention discloses a top blowing and lower combustion type boiler. The top blowing and lower combustion type boiler comprises a boiler body, and a fire grate is arranged inside the boiler body; an inner cavity of the boiler body is divided into a hearth and an ash chamber through the fire grate; a water jacket interlayer is arranged in the position, on the edge of the hearth, on the boiler body; a water inlet is formed in the lower end of one side of the water jacket interlayer; an upper opening of the boiler body is provided with a boiler cover; an air inlet is formed in the center of the boiler cover; an adjusting cover used for adjusting the size of the air inlet is hinged to one side of the air inlet; a smoke exhaust tank and water tanks are connected on the back side of the boiler body; a smoke vent is formed in the upper end of the smoke exhaust tank; the lower end of the smoke exhaust tank and the lower part of the hearth communicate with each other through a smoke exhaust channel which penetrates through the water jacket interlayer; the upper end of the water jacket interlayer communicates with the water tanks; and a water outlet is formed in the upper end of one of the water tanks. The top blowing and lower combustion type boiler has the beneficial effects that warm water entering the water tanks can be heated again, the utilization rate of heat energy is high, the combustion is sufficient, coal is saved, the heating speed of cold water is high, the temperature in the hearth can be prevented from decreasing, and combustion of coal in the hearth can be prevented from being hindered.

Description

Technical field [0001] The invention relates to a boiler, in particular to a top-blowing down-fired boiler. Background technique [0002] Civil boilers refer to household boilers for heating or bathing. They are small in size, low in energy consumption, and are typically suitable for household use. Civil boilers are divided into electric boilers, oil-fired boilers, gas-fired boilers and coal-fired boilers according to different fuels; according to different purposes, they are divided into heating boilers, bathing boilers and hot water boilers. It can heat the floor heating alone, or provide both heating and domestic hot water. [0003] The existing coal-fired heating boiler is generally composed of a furnace body, a hearth and a hot water jacket arranged in the furnace body, and a kang flue arranged behind the furnace body. The problems of this kind of boiler are: 1. The furnace and the flue are directly connected, and most of the heat generated by coal combustion is taken away b...

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Problems solved by technology

The problems of this kind of boiler are: 1. The furnace and the flue mouth are directly connected, and most of the heat energy generated by coal combustion is sucked away by the wind, so the utilization rate of heat energy is low, and combustible resources such as coal are wasted; 2. The hot water jacket is an annular water heater. The sleeve is placed on the periphery of the furnace, and the cold and hot water are mixed together, which reduces the temperature of the furnace to a certain extent, hinders the combustion of coal in the furnace, and easily leads to insufficient coal combustion, resulting in waste of coal

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