Natural gas heating furnace and smoke exhaust system thereof

Abstract

The invention relates to a natural gas heating furnace and a smoke exhaust system thereof. The natural gas heating furnace comprises a furnace body, a furnace door and a combustor, a furnace liner and the combustor are disposed in the furnace body, a panel and the furnace door are arranged on a side surface of the furnace body, the combustor comprises a plurality of combustion nozzles, and the combustion nozzles are respectively arranged on the side surfaces and the top of a hearth; the hearth is communicated with the smoke exhaust system, the smoke exhaust system comprises a heat recycler, a compensator, a butterfly valve and a smoke exhaust adjustor which are sequentially connected, a hot air pipe is communicated with the heat recycler, a smoke pipe cover is arranged above the smoke exhaust adjustor and is communicated with a smoke exhaust pipe via a smoke pipe and a bend, the bend comprises an elbow and a flue conical pipe, and the hot air pipe is connected with a gas pipe via a fan. The combustion nozzles are arranged on the side surfaces and the top of the hearth, and the temperature in the furnace rises fast, and is more uniform. Owing to the separate smoke pipe cover and the conical pipe with the gradually reduced diameter, heat loss is reduced effectively, and the temperature and the pressure in the hearth are controlled accurately, and are balanced.

Description

technical field [0001] The invention relates to a heating furnace for high-temperature heat treatment, in particular to a natural gas heating furnace with burners on the side and top of the furnace, and a smoke exhaust system of the natural gas heating furnace. Background technique [0002] The existing high-temperature heating furnaces used for heat treatment generally include resistance heating furnaces and natural gas heating furnaces according to the heating method, and box-type heating furnaces and trolley heating furnaces according to the structure. The side of the furnace of the natural gas heating furnace is provided with a burner, and the inside of the furnace is provided with a flue gas outlet, and the furnace is connected to the exhaust system through the flue gas outlet. [0003] At present, because the existing natural gas heating furnace is only equipped with burners on the side of the furnace, there is a large temperature difference in different areas in the f...

AI Technical Summary

Problems solved by technology

At present, the existing natural gas heating furnace usually has the following defects: 1. After the flue butterfly valve is opened, the straight-pipe chimney of the smoke exhaust system will have a strong draft phenomenon, causing the temperature and pressure in the furnace to drop too much, and the furnace A large amount of heat in the furnace is discharged by the chimney, and the temperature and pressure in the furnace are not balanced; 2. The temperature and pressure in the furnace are not easy to control accurately; 3. The consumption of natural gas fuel is large; 4. The quality of the heat treatment workpiece is poor

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