Indirect hot blast stove

Abstract

The invention relates to an indirect hot blast stove. The hot blast stove is designed with a cold air inlet, a hot air outlet, a flue gas inlet, a flue gas outlet, a supporting plate, a pressure valveand the like according to the technological requirements; the body of the hot blast stove is of a square structure, one side of the body of the hot blast stove is provided with an air inlet and an air outlet, the air enters a heat exchange bin from the bottom of the equipment and is discharged from the top after heat exchanging; a flue gas coiler inlet and a flue gas coiler outlet are arranged onthe other side of a shell of the indirect hot blast stove, the flue gas enters a coiler and then is circulated through a flue gas guide bin, the flue gas is subjected to heat exchanging with the air,and a baffle plate is arranged to extend an air flow channel in the heat exchange bin; the hot blast stove is characterized in that the the hot blast stove is divided into two layers, the interior ofthe hot blast stove is a heat exchange bin part for heat exchanging of the flue gas and the air, the outer part of the hot blast stove is an insulating layer, the inside heat exchange bin comprises ashell pass flow channel for flowing the air and a heat exchange coiler for flowing the flue gas, and the shell pass air flow channel is composed of the wall surface of the heat exchange bin and the baffle plate; and each layer of air flow channel is connected through an air guide bin, and the air flow guide bin is welded to the outer wall surface of the heat exchange bin and extends outwards fromthe wall surface of the heat exchange bin.

Description

technical field [0001] The invention relates to drying equipment for processing products such as medicine and food, for example, an indirect hot blast stove, especially suitable for indirect hot blast stoves using natural gas as a combustion medium. Background technique [0002] The gas-fired hot blast stove is a drying equipment for drying and processing products such as medicines and food through high-temperature flue gas. The use of gas-fired hot blast stoves is subject to certain restrictions. When drying materials that are not allowed to be contaminated, indirect hot air stoves are often used. The working principle of the indirect hot blast stove is to heat the air channel through high-temperature flue gas, and the inner surface of the flow channel exchanges heat with the air to ensure that the air will not be polluted by the flue gas, and the heated air directly dries the material. The fuel of the hot blast stove has gradually changed to natural gas-based clean energ...

AI Technical Summary

Problems solved by technology

However, the air flow path of the indirect hot blast stove of this design is narrow and the process is short, which may easily cause technical problems such as small flow of hot air at the outlet and insufficient heat exchange.

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