Efficient heat exchanging boiler device

Abstract

The invention provides an efficient heat exchanging boiler device, and relates to the technical field of boilers and combustion. The efficient heat exchanging boiler device comprises a chain grate, a combustor and a flue gas flowing chamber; a front arch is installed at the front end of the position above the chain grate, a back arch is installed at the back end of the position above the chain grate, the interior of the flue gas flowing chamber is divided into multiple flue gas flowing chamber bodies which are connected in series through membrane walls, and superheaters are installed in the flue gas flowing chamber bodies. According to the efficient heat exchanging boiler device, by designing the structure of the flue gas flowing chamber bodies and the superheaters, hierarchical efficient utilization of high-temperature flue gas heat is achieved through many times of heat exchanging; by dividing the flue gas flowing chamber into multiple series structures, a high-temperature flue gas flow field can be fluent and low in flue gas resistance; the temperature in the combustor is increased through the special heat storage, heat conduction and radiation effects of the front arch, and high-temperature efficient combustion of multiple complex fuel can be achieved.

Description

technical field [0001] The invention relates to the technical field of boilers and combustion, in particular to a high-efficiency heat exchange boiler device. Background technique [0002] Boilers are energy conversion and heat transfer equipment widely used in industrial production and daily life. They generate energy or heat through the combustion of fuel (gas, liquid, solid fuel) and exchange heat with water or oil to provide high-temperature steam or heat. water for the purpose. The current boilers mainly burn coal. In recent years, biomass fuels have gradually been applied in the boiler field. [0003] In production practice, the existing boilers (fired coal, oil, gas and biomass) all have problems such as low combustion efficiency, low heat exchange efficiency, and high boiler cost. The main reasons are: [0004] First, the combustion efficiency is low; on the chain grate, the combustion of fuel (coal and biomass) on the boiler chain grate is divided into four stages...

AI Technical Summary

Problems solved by technology

[0003] In production practice, the existing boilers (fired coal, oil, gas and biomass) all have problems such as low combustion efficiency, low heat exchange efficiency, and high boiler cost. The main reasons are:

[0004] First, the combustion efficiency is low; on the chain grate, the combustion of fuel (coal and biomass) on the boiler chain grate is divided into four stages: drying, pyrolysis, combustion and burnout

The temperature of the furnace directly affects the combustion effect of the fuel on the chain grate. When the temperature is high, the drying and pyrolysis stages of the fuel are short, and the fuel can be ignited quickly on the chain grate, and there is enough residence time on the chain grate to burn Fully; on the contrary, the fuel cannot be fully burned, resulting in energy waste

The increase in the length of the chain grate brought about by the full combustion of fuel will inevitably increase the cost of the boiler. At the same time, the complexity of the fuel also limits the adaptability of the chain boiler; therefore, how to improve the combustion efficiency of the chain boiler and the adaptability to fuel needs to be solved urgently;

[0005] Second, the heat exchange efficiency is low; the high-temperature flue gas travels quickly during the heat exchange process, and the residence time in the furnace is short. The water in the tube is fully absorbed; the heat exchange efficiency between the high-temperature flue gas and the pyrotechnic tube affects the energy utilization rate and economy of the entire boiler, so how to improve the heat exchange efficiency between the high-temperature flue gas and the pyrotechnic tube also needs to be solved urgently;

[0006] Third, the cost of the boiler is high; the existing boiler design has an uneven temperature field in the furnace, mainly convective heat transfer, and the heat transfer efficiency is low

In order to achieve the design efficiency of the boiler, the heat transfer area must be increased, which increases the equipment investment and the flue gas resistance.

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