Fuzzy weighing pressure difference compensation method for charging tank of serial-tank bell-less top

Abstract

The invention discloses a fuzzy weighing pressure difference compensation method for a charging tank of a serial-tank bell-less top. According to the method, weighing pressure difference compensation coefficients of the charging tank are subjected to on-line fuzzy modeling by using pressure and charging tank weighing data which are acquired in the primary pressure equalization process and secondary pressure equalization process of the charging tank in real time, so as to obtain a non-linear physical relationship of the difference between the top pressure and the charging tank pressure and the weighing pressure difference compensation coefficients of the charging tank; due to a calculation model of the weighing pressure difference compensation coefficients of the charging tank of the serial-tank bell-less top, the technical problem that the pressure difference compensation coefficients are shifted because of external factors of the blast furnace is effectively solved; as the calculation model of the weighing pressure difference compensation coefficients of the charging tank of the serial-tank bell-less top, based on on-line process data, is applied to an on-line weight pressure difference compensation value calculation procedure in the discharging process of the charging tank, accurate control in a weight method allocation process is ensured, a blast furnace bell-less allocation system is enabled to stably, uniformly and precisely control the allocation flow, the smelting level of the blast furnace in smelting is remarkably improved, and the time-change characteristic of the blast furnace in the production process is completely adapted.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking with bellless tops, and in particular relates to a method for fuzzy compensation of tank weighing differential pressure with bellless tops. Background technique [0002] With the development of smelting technology, currently blast furnaces generally use bellless tops for material distribution, such as stringing tanks without bells, parallel tanks without bells, three tanks without bells, and double bells and four valves. Among them, the tankless bell is dominant. Currently, large blast furnaces under construction basically adopt the charging process of the tankless bell system. In order to improve the efficiency of blast furnace smelting, the technical requirements for finer fabrics are also getting higher and higher. Due to the harsh production environment of the blast furnace top and the limitation of the installation conditions of the instrument and equipment, the bellless top...

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Problems solved by technology

[0004] At present, the commonly used weighing differential pressure compensation method is the linear compensation method. This method cannot correct the linear compensation coefficient in real time, and cannot continuously ensure the accuracy and stability of the weighing value of the tank.

In the invention patent with the publication number CN101985669A and the invention title "Differential Pressure Compensation Self-Correction Method for Furnace Top Tank Weighing", a method for correcting the weighing differential pressure compensation coefficient with a periodic memory compensation method is described. Although this method can effectively solve the technical problem of linear compensation coefficient drift caused by peripheral factors of the blast furnace, the production practice shows that this method is too sensitive to the measurement data of "bad points". When the weighing value of the tank is seriously inaccurate, it will often cause fluctuations in the self-correction linear compensation coefficient, and there is no "bad point" data removal mechanism, so that these data may always affect the subsequent self-correction results, and there is a hidden danger of further deterioration of the self-correction results

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