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An automatic control system and method suitable for closed-circuit cement combined grinding

An automatic control system and combined grinding technology, applied in the field of automatic control system and closed-circuit cement combined grinding, can solve the problems of low cement production efficiency, increased power consumption, and reduced equipment service life.

Active Publication Date: 2017-10-31
UNIV OF JINAN +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide an automatic control method suitable for closed-circuit cement combined grinding, which solves the problem that most of the control of the current closed-circuit cement clinker grinding system is completed manually by operators, which makes the cement production efficiency low and reduces The service life of some equipment is shortened, and the problem of power consumption is increased

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  • An automatic control system and method suitable for closed-circuit cement combined grinding
  • An automatic control system and method suitable for closed-circuit cement combined grinding
  • An automatic control system and method suitable for closed-circuit cement combined grinding

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[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like figure 1 Shown is the closed-circuit cement combined grinding automatic control system of the present invention. First, the raw materials such as gypsum, fluorogypsum, and clinker are prepared in a certain proportion, then weighed by the weighing bin 1, and then entered into the roller press 2 for rolling. Afterwards, it is sent to the powder separator 4 for screening by the elevator 3. The qualified raw materials enter the ball mill 6 through the cyclone 5 for grinding, and the circulating fan 7 supplies air to the cyclone 5, and the unqualified raw materials need to be returned to the roller. The press 2 is rolled, and the qualified raw materials are sent to the air chute 9 by the out-grinding elevator 8, and ultra-fine fly ash and mineral powder are added in a certain proportion, and the ultra-fine fly ash passes through the ultr...

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Abstract

The invention relates to an automatic control method suitable for a closed-circuit cement combined grinding system. Four control loops, including a powder selecting machine rotating speed loop, a cement granularity loop, a weighing warehouse material level loop and an ultrafine fly ash elevator current loop, are extracted from the closed-circuit combined grinding system. As for the powder selecting machine rotating speed loop, bang-bang control is adopted to constrain an error of ground elevator current, and Fuzzy control is applied so that the tracking error of the ground elevator current is converged to be bounded; as for the cement granularity loop, bang-bang control and Fuzzy-PID control are adopted to control material feeding mount and powder selecting machine rotating speed; as for the weighing warehouse material level loop, bang-bang control is adopted to control the total given amount; and as for the ultrafine fly ash elevator current loop, bang-bang control is adopted to control large proportion of fine powder. Phenomena of grinding plugging, full grinding, empty grinding and ultrafine fly ash and ground elevator overload are effectively avoided so that cement production efficiency is effectively enhanced.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and relates to an automatic control system and method suitable for closed-circuit combined cement grinding. Background technique [0002] Most of the closed-circuit cement clinker grinding systems in China are controlled manually by operators. The closed-circuit cement combined grinding system has the characteristics of pure lag, large inertia, multi-variable, strong coupling and time-varying model, which increases the difficulty of manual control of the mill. In addition, during the working process of the closed-circuit cement combined grinding system, the phenomena such as blocked grinding, saturated grinding, empty grinding, ultra-fine fly ash and overload of the grinding hoist occur from time to time, which not only affects the normal production, but also reduces the cement production. Efficiency, reducing the service life of some equipment, and increasing the power consumption. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCG05B19/418
Inventor 袁铸钢张强王孝红侯居东孟庆金景绍洪于宏亮申涛王新江邢宝玲高红卫崔行良白代雪刘化果任春里
Owner UNIV OF JINAN
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