Step-by-step type fire grate pushing forced circulation coal-fired hot water boiler

Abstract

The invention discloses a step-by-step type fire grate pushing forced circulation coal-fired hot water boiler. The coal-fired hot water boiler comprises a base and a boiler body, wherein a fire grateis arranged on the base; the boiler body is arranged above the fire grate; a boiler barrel is arranged on the boiler body; and a dust filtering assembly is arranged in the boiler body and filters dustin smoke. A heat dissipation layer is installed in the boiler body and arranged on the inner wall of the boiler body, absorbs heat in the boiler body and supplements the absorbed heat into the boileragain, heat absorption of the boiler wall is reduced, and therefore heat losses are reduced, and the heat utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of coal-fired hot water boilers, in particular to a step-by-step push grate forced circulation coal-fired hot water boiler. Background technique [0002] A boiler is a device that heats water through the heat energy released by medium combustion and generates water vapor or hot water with specified parameters (temperature, pressure). Coal-fired boiler is a boiler that uses coal as fuel. After burning coal in the furnace (combustion chamber) to release heat, it is a thermal power equipment that heats heat medium water or other organic heat carriers to a certain temperature. Coal-fired boilers are classified into coal-fired boiling water boilers, coal-fired hot water boilers, coal-fired steam boilers, and coal-fired thermal oil boilers according to their uses. Coal-fired hot water boilers are usually designed according to normal pressure, and there is an air port on the top of the furnace body, so that the bo...

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Problems solved by technology

[0003] However, because coal-fired boilers do not convert all the heat effectively, some of them are consumed reactively, and the internal structure of current coal-fired hot water boilers is generally unreasonable. For example, a large number of flue gas pipes are installed inside the existing drum. , and the flue gas pipe on the outermost side has the highest heat exchange efficiency, followed by the flue gas pipe on the middle layer, and the flue gas pipe at the central position exchanges heat and cold with the heated water, so that the flue gas pipe at the central position The heat exchange efficiency of the flue gas pipe is low, so that the heat in the central flue gas pipe cannot be effectively utilized, resulting in a low utilization rate of heat, which in turn increases the consumption of coal and increases the cost; the layout is not compact, and the flue gas Problems such as short process flow and small heating area lead to poor heat transfer effect of the boiler and high heat carried by the flue gas, resulting in low thermal efficiency and high energy consumption of the boiler

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