Energy-saving method for successive heating and successive stopping of heating in tunnel furnace

Abstract

The invention relates to an energy-saving method for successive heating and successive stopping of heating in a tunnel furnace. The method comprises the following steps: setting a plurality of heating areas in the tunnel furnace along the length direction; starting the tunnel furnace, controlling a heating area near workpieces to preheat in advance before the workpieces enter the heating areas successively, and taking the heating area as an advanced preheating area; enabling the temperature of the advanced preheating area to reach set temperature when the workpieces enter the corresponding advanced preheating area; proceeding in this way to achieve successive heating till all the heating areas operate normally; after production tasks are completed or production needs to be stopped, controlling the heating area near the workpieces to delay stopping heating after the workpieces leave the heating areas successively, and taking the heating area as an accompanying heat preservation area; enabling the accompanying heat preservation area to stop heating when the workpieces go away from the corresponding accompanying heat preservation area; and proceeding in this way to achieve successive stopping of heating till all the heating areas finish operating. Through the method, the energy can be reasonably used; the heating time is shortened; the energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel furnace energy saving, in particular to an energy saving method for sequentially heating and sequentially stopping heating of a tunnel furnace. Background technique [0002] At present, there are various tunnel heat treatment furnaces (referred to as tunnel furnaces) with different lengths on the market. The length of the tunnel furnace is longer than that of ordinary heat treatment furnaces, generally as long as 20 to 30 meters; among them, especially some tunnel furnaces with a length of more than 25 meters, the heat treatment time needs more than six hours. According to the conventional design: when the tunnel furnace is started, it must be heated for the entire length; after the feeding is stopped or when it needs to be stopped, the heating device must wait until all the workpieces are heat treated before stopping. [0003] Since the entire tunnel furnace needs to be powered on for heating at ...

AI Technical Summary

Problems solved by technology

[0003] Since the entire tunnel furnace needs to be powered on for heating at the initial stage of work, and the workpiece to be heat-treated enters the front part of the tunnel furnace, only the front part of the tunnel furnace is the part for effective use of heat energy, while the middle and rear parts are heated too early State, resulting in about 80-90% of energy ineffective use, resulting in energy waste

For this reason, the present invention improves and designs the heating method of the existing tunnel furnace to solve the problems of long heating time and high energy consumption of the tunnel furnace

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