SU1645831A1 - Weigh-hopper - Google Patents

Abstract

The invention relates to the dosing of materials in the chemical, metallurgical and other sectors of the industry and can be used, in particular, when dosing the components of the sinter blend. The purpose of the invention is to improve the quality of dosing by reducing the recovery time of a given flow rate of bulk material. The method of dispensing components from a hopper with a flow rate booster includes measuring the flow rate of a component from a hopper, comparing the set and measured flow rates and changing the flow rate of the component by the feeder according to the error signal between the set and measured flow rates. Measure the speed of the feeder, its derivative, determine the signs of the derived signals of the component consumption and the speed of the feeder and, with a positive derivative of the speed of the feeder and a negative derivative of the consumption of the material, include a flow booster. 1 il. fe

Description

The invention relates to the dosing of materials in the chemical, metallurgical and other sectors of the industry and can be used, in particular, when dosing the components of the sintering mixture.

The purpose of the invention is to improve the accuracy of dosing by reducing the time to restore the specified flow rate of bulk material.

The drawing shows a device diagram illustrating the implementation of the proposed method of automatic dosing of components.

The device consists of setpoint 1. controller 2 controlling the feeder 3 depending on the signal from the flow sensor 4, the control unit 5 of the flow rate booster 6 from the bunker 7 depending on a given combination of signs of the derived signals from the feeder speed sensor 8 and the flow sensor 4 of the component through differentiators 9.

The method is carried out as follows.

Bulk material is dosed with a certain flow rate with the help of disc feeders and through belt weight measurement.

 ate

00 CJ

whether it is fed to a collecting conveyor. The regulator 2 maintains a predetermined consumption of ml-material. For example, in hopper 7, the material began to hang and the flow rate of the material was reduced. The signal from the yes of the flow meter 4, arriving at the input of the controller 2 and comparing with the signal of the setpoint 1, causes an increase in the rotation of the power supply feeder 3 (try to keep the former, depending on dependence, flow) and, accordingly, increase the speed of the feeder 3. Since the material consumption does not restore to the set (former) even with increasing rotational speeds of the feed plate, the inputs of the flow rate controllers 5 begin to receive signals through the differentiators 9 that the material consumption from the sensor changes and decreases (increased u) velocity of the feeder 3 and teak Soon.

The control unit 5 for the consumption booster, due to just such a combination of signs of the derived signals: material consumption (minus) and feeder speed (plus), already at the very beginning of the hang, gives a signal to activate the material consumption booster 6. When you turn on the driver 6 consumption occurs collapse of the frozen material from the hopper 7 and its consumption is restored to the specified for a short time

The use of the invention makes it possible, with estimates of the rapid restoration of a given ratio of components, to improve the quality of the agglomerate on the evenness of the chemical composition and to stabilize the level of its melting.

Claims (1)

The invention The method of automatic dosing of bulk material from a bunker with a flow rate booster through a feeder, including measuring the flow rate of bulk material, comparing the specified and measured flow rates and changing the flow rate of bulk material from the bunker at the mismatch of pumped and measured flow rates, determining the derived flow rate over time, t-l and in order to increase the accuracy of dosing by reducing the recovery time of a given ratio of components, the speed of the feeder, its time derivative, the signs of the derivative of the speed of the feeder and the derivative of the flow rate of components and with a positive derivative of the speed of the feeder and a negative derivative of the flow rate of the bulk material include a flow booster. }