Efficient energy-saving multi-temperature-gradient hot air system

Abstract

The invention relates to the technical field of thermal power machinery, in particular to an efficient energy-saving multi-temperature-gradient hot air system which comprises a rectangular hollow hotair furnace body, and the interior of the hot air furnace body is divided into four areas from bottom to top, namely an ash accumulation bin, a combustion bin, a heat exchange bin and a hot air bin. The ash accumulation bin is arranged at the bottommost layer of the hot air furnace body; the combustion bin is arranged on the ash accumulation bin; the heat exchange bin is arranged on the combustionbin; the hot air bin is arranged at the topmost layer of the hot air furnace body. The device has the beneficial effects that a smoke exhaust pipeline is arranged in the hot air bin at the top layerin a snake shape, and waste heat of smoke is fully utilized; two hot air outlets are formed in the hot air bin, one hot air outlet sends out air heated by a flue gas pipe in the hot air bin, the otherhot air outlet sends out air heated in the ceramic heat exchanger, and hot air at different temperatures is conveyed to places needing different temperatures; and hot air with different temperature gradients can be conveyed by using one hot air furnace, so that energy consumption is greatly reduced, and the use efficiency of the hot air is improved.

Description

technical field [0001] The invention relates to the technical field of thermodynamic machinery, in particular to a hot air system with high efficiency, energy saving and multiple temperature steps. Background technique [0002] Through long-term production practice, people have realized that only by using hot air as the medium and carrier can the heat utilization rate and thermal work effect be greatly improved. Traditional electric heat sources and steam thermal power are often equipped with multiple circulating fans during the transportation process, so that they will eventually form hot air indirectly for drying or heating operations. This process obviously has many shortcomings such as a large amount of waste of energy, excessive auxiliary equipment, and complicated technological process. The bigger problem is that this kind of heat source is helpless for the kind of requirements that require higher temperature drying or baking operations. [0003] At present, coal-fir...

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Problems solved by technology

The main manifestations are that on the one hand, the hot blast stove has serious ash accumulation, and it is also very difficult to clean it. On the other hand, the flue gas of the hot blast stove is directly discharged, and the waste heat of the flue gas is wasted. On the other hand, the outlet temperature of the traditional hot blast stove There is only one, it is not applicable to the use of different temperatures, such as the temperature required for heating and drying is not the same

[0004] In addition, in order to quickly reach the required high blast temperature, the traditional hot blast stoves used in blast furnace smelting often require multiple parallel connections for air supply, which occupy a large area and require high construction costs.

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