Multi-fuel indirect heating hot air stove with heat pipes

Abstract

The invention relates to a multi-fuel indirect heating hot air stove with heat pipes. The multi-fuel indirect heating hot air stove is high in energy utilization rate and comprises an outer shield; a plate heat exchanger is arranged in the outer shield and comprises a first shell, a second shell arranged in the first shell, a third shell arranged in the second shell and a fourth shell arranged in the third shell; a first descending air flue is formed between the outer shield and the first shell, a smoke flue is formed between the first shell and the second shell, an ascending air flue is formed between the second shell and the third shell, a second descending air flue is formed between the third shell and the fourth shell, the first descending air flue is communicated with the ascending air flue, and the ascending air flue is communicated with the second descending air flue; the cavity of the fourth shell is communicated with the smoke flue, and a fire grate is arranged on the bottom surface of the cavity of the fourth shell; a hot air confluence cavity is formed in the lower part of the outer shield, a smoke box is arranged under the hot air confluence cavity, and a hot air outlet is formed in the back of the hot air confluence cavity; the multiple heat pipes are arranged on the top surface of the first shell.

Description

technical field [0001] The invention relates to a hot blast stove, in particular to a multi-fuel heat pipe indirect heating hot blast stove. Background technique [0002] A hot blast stove is a device that uses the heat released by fuel combustion to indirectly heat the air and output hot air. It is widely used in grain drying and other fields. The existing larger hot blast stoves generally use tube-and-tube heat exchangers. Structural limitations make the unit heat exchange efficiency low so that the heat exchanger has a large volume, coupled with the connection method with the combustion furnace body, etc., it occupies a large area and is difficult to construct and maintain; small hot blast stoves also use plate heat exchange The heat exchanger is used as a heat exchange device, but the exchanging heat of the existing plate heat exchange hot blast stove is very small, because the heat exchange area between the cold air and the hot flue gas is small, and its heat exchange e...

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Problems solved by technology

[0002] A hot blast stove is a device that uses the heat released by fuel combustion to indirectly heat the air and output hot air. It is widely used in grain drying and other fields. The existing larger hot blast stoves generally use tube-and-tube heat exchangers. Structural limitations make the unit heat exchange efficiency low so that the heat exchanger has a large volume, coupled with the connection method with the combustion furnace body, etc., it occupies a large area and is difficult to construct and maintain; small hot blast stoves also use plate heat exchange The heat exchanger is used as a heat exchange device, but the exchanging heat of the existing plate heat exchange hot blast stove is very small, because the heat exchange area between the cold air and the hot flue gas is small, and its heat exchange efficiency is very low, thereby reducing the utilization rate of energy

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