Converter dry dedusting micro-differential pressure control method and device as well as converter dry dedusting system
A technology of converter dry dust removal and control method, which is applied in the field of converter dry dust removal micro-differential pressure control and converter dry dust removal system, can solve problems such as oscillation and micro-differential pressure control lag, and achieve high-quality gas recovery and robust sex high effect
Active Publication Date: 2019-04-12
湖南华菱涟源钢铁有限公司
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[0005] The purpose of the present invention is to provide a converter dry dust removal micro-differential pressure control method, device and converter dry dust removal system, aiming to solve the problem in the prior art that the traditional PID adjustment is likely to cause hysteresis and oscillation of the micro-differential pressure control
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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0023] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
[0024] In addition, it should be noted that the orientation terms such as left, right, up, and down in the embodiments of the present invention are only relative concepts or refer to the normal use state of the product, and...
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The invention discloses a converter dry dedusting micro-differential pressure control method and device as well as a converter dry dedusting system. The converter dry dedusting micro-differential pressure control method comprises the following steps that whether a blowing signal exist or not is detected, when the blowing signal is detected, an oxygen content value and a CO content value in flue gas are obtained in real time, and a stage where a dedusting process is located is judged according to the oxygen content value and the CO content value; when it is judged that the dedusting process isin a blowing early stage, an early-stage control value is used as a target output value to be output to a frequency converter, when it is judged that the dedusting process is in a recovery stage, a recovery stage control value is used as the target output value to be output to the frequency converter, and the frequency converter controls the operation of an induced draft fan according to the target output value. According to the converter dry dedusting micro-differential pressure control method and device as well as the converter dry dedusting system, the converter dedusting process is dividedinto two control stages, namely, the blowing early stage and the recovery stage, furnace mouth micro-differential pressure control is carried out in a targeted mode in each stage, so that the robustness is high, the micro-differential pressure of a furnace mouth can well fluctuate within a range of a set value + / -30 Pa, and the purpose of stable, high-quantity and high-quality coal gas recovery is achieved.
Description
technical field [0001] The invention relates to the technical field of electric control in the iron and steel metallurgy industry, in particular to a method and device for controlling the micro-differential pressure of converter dry dedusting and a converter dry dedusting system. Background technique [0002] Converter gas dry purification and recovery process (LT method) has high dust removal efficiency and remarkable energy-saving effect. It is an advanced converter dust removal and purification process and has become the development direction of converter dust removal technology. Converter steelmaking basically adopts the top-blown oxygen smelting process. During the entire blowing cycle, the amount of flue gas, flue gas temperature and flue gas composition produced by converter blowing change periodically with the blowing process. During the converter steelmaking process The oxidation reaction of the furnace is not carried out uniformly. At different times of blowing a f...
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IPC IPC(8): C21C5/40C21C5/38
CPCC21C5/38C21C5/40
Inventor 张新建冯力力刘杰中黄兆军容东阳
Owner 湖南华菱涟源钢铁有限公司
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