Coke oven positive pressure baking system and temperature control method

Abstract

The invention provides a coke oven positive pressure baking system and a temperature control method. Pressure of a baking gas main pipeline is used as a controlled object, the openness of an electric adjustment valve of the baking gas main pipeline is automatically calculated and adjusted in real time according to deviation between actual pressure and target pressure and deviation changing rate, and the baking gas pressure stability during the whole baking process is ensured; in control of a positive pressure baking device, a feedback value of the openness of a gas branch pipe adjustment valve is introduced to a control loop to form series adjustment, coke oven baking temperature control is used as a main ring, and gas branch adjustment valve openness control is used as a secondary ring; and in control of gas branch adjustment valve openness, idling path difference is eliminated by adding control of setting openness of the adjustment valve, the influence caused by idling path difference of the gas branch adjustment valve of the coke oven positive pressure baking device can be overcome, the baking temperature is accurately controlled, and the automatic temperature control accuracy of the positive pressure baking system is improved.

Description

technical field [0001] The invention relates to the technical field of coke oven ovens, in particular to a coke oven positive pressure oven system and a temperature control method. Background technique [0002] The oven is an important and complex process before the coke oven is put into production, and its quality has a crucial impact on the life of the coke oven. With the development trend of large-scale coke ovens, the advantages of the positive pressure oven method are becoming more and more obvious. At present, almost all coke ovens with a height of 7.63m and above are baked in positive pressure oven mode. [0003] The existing domestic coke oven positive pressure oven system has the following deficiencies: [0004] 1. The temperature of the positive pressure oven is greatly affected by the gas pressure of the main gas pipeline of the oven. When the pressure of the oven gas source fluctuates, it cannot be adjusted in time, resulting in a large change in the oven tempe...

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Problems solved by technology

[0004] 1. The temperature of the positive pressure oven is greatly affected by the gas pressure of the main gas pipeline of the oven. When the pressure of the oven gas source fluctuates, it cannot be adjusted in time, resulting in a large change in the oven temperature. Affect the quality of the oven, but also bring a greater workload to the oven personnel

[0005] 2. Due to the fact that there is a certain space difference in the gas branch control valves of the current positive pressure oven system, the control valves cannot accurately implement the control amount issued by the positive pressure oven control system. Therefore, the control of the oven temperature The accuracy has a great influence, especially when the coke oven temperature is low in the initial stage of the oven, the influence is more serious

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