Fuel gas and fuel oil hot blast stove

Abstract

A fuel gas and fuel oil hot blast stove comprises a sealed stove body with an air inlet and a hot air outlet. A hearth with fuel gas or fuel oil is mounted in the stove body and is composed of a cylindrical inner container. The front end of the cylindrical inner container is connected with a circular sealing head. The rear end of the cylindrical inner container is connected to an outer spacer bush in the stove body and communicates with a mounting joint of a burner. The side walls, on the inner side of the circular sealing head, of the cylindrical inner container are connected with a U-shaped heat conducting smoke exhaust pipe which is arranged on the outer side wall of the cylindrical inner container in a coiled manner through multiple joints evenly distributed. A middle spacer bush is arranged on the outer portion of the cylindrical inner container in a sleeving manner from one end of the circular sealing head, is inserted into the U-shaped heat conducting smoke exhaust pipe from an opening of the U-shaped heat conducting smoke exhaust pipe and contains half of the U-shaped heat conducting smoke exhaust pipe. A smoke gathering cavity communicating with a smoke outlet of the U-shaped heat conducting smoke exhaust pipe is formed between the inner side wall of the hot air outlet of the stove body and the end face of the middle spacer bush. The smoke gathering cavity communicates with heat exchange pipes arranged on the inner side wall of the stove body in at least one of shell-and-tube heat exchangers.

Description

technical field [0001] The invention relates to a gas-fired hot air stove, which is mainly suitable for equipment such as dried fruit frying and food drying, and belongs to the technical field of drying and heating equipment. Background technique [0002] The existing traditional hot blast stove is a device that converts the input cold air into hot air output through heat exchange. It indirectly heats the cold air entering the furnace body from the cold air inlet by heating the medium in the combustion tube, and the heated air is finally discharged from the furnace. The hot air outlet is output to the outside of the furnace. Although this kind of hot blast stove can use a variety of combustion medium sources, such as coal, fuel oil or gas, the hot air produced is relatively clean and will not mix with hot flue gas to cause pollution. However, this hot air After the heat generated by the furnace combustion is indirectly heated by the heat exchanger and the cold air becomes ho...

AI Technical Summary

Problems solved by technology

[0002] The existing traditional hot blast stove is a device that converts the input cold air into hot air output through heat exchange. It indirectly heats the cold air entering the furnace body from the cold air inlet by heating the medium in the combustion tube, and the heated air is finally discharged from the furnace. The hot air outlet is output to the outside of the furnace. Although this kind of hot blast stove can use a variety of combustion medium sources, such as coal, fuel oil or gas, the hot air produced is relatively clean and will not mix with hot flue gas to cause pollution. However, this hot air After the heat generated by the furnace combustion is indirectly heated by the heat exchanger and the cold air becomes hot air, the thermal efficiency is very low. The main reason is that the structure is unreasonable and the heat exchange effect is poor. The temperature of the air is not high enough, which is difficult to meet the needs of some equipment that requires large-capacity, high-temperature hot air, such as dried fruit roasted seeds, food drying equipment, etc.

Images