A coke oven heating system and its exchange heating control method

Abstract

The invention discloses a coke oven heating system. Limit switches are respectively arranged at the movement limit positions at both ends of the piston rod of each hydraulic oil cylinder; piston rod flanges are respectively arranged at the two ends of the piston rod; when the piston rod flange moves to the limit position, the piston rod flange triggers the corresponding limit switch; the limit switch obtains the information of the actual state of the piston movement of the hydraulic cylinder and sends this information to the control unit of the coke oven heating system. The invention also discloses an exchange heating control method of the heating system. The present invention analyzes and diagnoses hydraulic faults by adopting optimized safety interlocking and adding oil circuit pressure detection devices, which eliminates the major safety hazards in the heating system when the hydraulic system fails in the prior art, and can identify the hydraulic faults of the gas heating system in time, and carry out Safe stop effectively improves the safety performance of the coke oven heating system.

Description

technical field [0001] The invention belongs to the technical field of coke oven production equipment control. More specifically, the present invention relates to a coke oven heating system, in particular to the system program design of the control method for the exchange heating of a 7.63m coke oven. Background technique [0002] The 7.63m coke oven of Maanshan Iron and Steel Co., Ltd. is the first super-large coke oven introduced in China. The technical solution of the heating and exchange system of the coke oven is provided by UHDE Company of Germany. The system drives the gas exchange cock through the hydraulic cylinder to realize the alternating and reverse heating of the double fire channel. The order of gas exchange is to turn off the gas first, then exchange the air and exhaust gas, and finally turn on the gas, and the exchange frequency is 20min / time. [0003] When exchanging, it must be satisfied that the remaining gas in the furnace is completely combusted, and ...

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Problems solved by technology

[0004] However, in the heating gas exchange system of the prior art, when the hydraulic system performing the action breaks down, the malfunction of two oil cylinders starting at the same time may occur, or the backward gas hydraulic cylinder starts before the exhaust gas hydraulic cylinder. Malfunction, resulting in a gas explosion in the regenerator or flue of the coke oven

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