RU1768317C - Method for automated control of cyclone-vortex apparatus - Google Patents

Abstract

The invention relates to methods for automatically controlling a cyclone-vortex apparatus and can be used for defluorination of feed phosphates. The application of the method allows to increase the accuracy of regulation and the reliability of the cyclone-vortex apparatus. The method involves changing the ratio of fuel to oxidizer consumption on each of the burner devices of the apparatus and measuring the values of vibroacoustic signals on each burner space of the flow of raw materials into the apparatus, the heat load on the apparatus and its rate of change. From the measured values, the degree of re-refining of each burner is calculated and, depending on the calculated value, the ratio of fuel to oxidizer consumption on each burner is controlled using a fuzzy algorithm.

Description

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The invention relates to methods for automatically controlling cyclone-vortex devices and can be used for defluorination of feed phosphates.

The aim of the invention is to improve the accuracy of regulation and reliability of the apparatus.

The drawing shows a schematic diagram of a system for automatically controlling a cyclone-vortex apparatus implementing this method.

A method for automatically controlling a cyclone-vortex apparatus is carried out as follows.

Initial phosphate feed is supplied to the cyclone-vortex apparatus 1, and fuel and oxidizer are supplied to each of its burner devices. On the body of the device 1 r house with

each of the burner devices has a vibration sensor 2. The output signal of the vibration sensor 2 is fed to a spectrum analyzer 3.

The spectrum of the vibration characteristics of the burner device obtained in the spectrum analyzer 3 is fed to the input of the classifier 4, which also receives the reference spectral characteristic from the block of samples 5 and a synchronization signal from the block of synchronization 6. In the block of samples 5, a set of reference vibration spectra is stored, which correspond to a certain melting state of each burner device . The purpose of the synchronization unit 6 is to coordinate the incoming spectral characteristic with the number of the burner device and with the spectrum standard of this burner. In classificator xj

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Information 4 is generated in the form of a 16-bit word about the standard class of the current state of fusion of the burner device. The choice of state classes as well as reference spectra is carried out on the basis of experimental data. In differentiator 7, the rate of change of the current state is calculated as the difference between the subsequent and previous states divided by the time between them. The diagnosis thus made about the state of burner flooding is fed to the input of a fuzzy logic controller 8.

Optimum process control is achieved only if the aerodynamic and thermal conditions of the apparatus are consistent. Therefore, the input of the controller 8 also receives information from the heat flow sensor 9 and its rate of change from the differentiator 10. The sensor 9 is located in the area of the cyclone chamber clamp and is an indicator of the heat load of the apparatus. The input of the fuzzy controller 8 also receives information from the flow sensor of the phosphate rock raw material 11. Thus, the fuzzy logic controller 8 changes the fuel consumption for each burner device.

Since the fuel-oxidizer ratio needs to be maintained at a minimum oxidizer excess ratio of 1.05 for this type of apparatus), the oxidizer consumption on each burner is accordingly changed using the correcting regulator 12 depending on the class of the state of the skull, on the consumption of raw materials, heat device status. This takes into account the rate of change of the thickness of the skull in the region of the burners and the rate of change of the heat flux,

Example. Statistical analysis of the experimental data makes it possible to select the following values of the measured parameters as a basic variant: for a cyclone with a diameter Ots of 1.667 m, a pinch diameter of Dn 0.72 m, a height of H 2.75 m,

the feed rate Gc 1.94 kg / s, the gas flow rate Gr 0.785 nm / s, the heat flux q 96.15 kJ / kgf, the skull condition of burner device A - no fusion. The sensors are interrogated with a period of 60 s.

When the flow rate deviates from the norm L Gc from 0 to + 2%, the deviation L A from the normal state by -6% with an increase in the rate of change of the state of the skull S L A by + 2%, the deviation of the heat flux from the norm A q from 0 up to -10.2% when the rate of change of the heat flux S Aq from 0 to -1%, the following situation occurs:

the burner device is melted, however, there is a tendency to its fusion, as evidenced by a change in S A A, while the thermal state of the apparatus is below normal, therefore

the risk of renewal of the process of dedusting, as evidenced by the absence of an increase in S Aq, therefore, in order to maintain the tendency for the burner to melt, it is necessary to maintain a high gas consumption for this burner, which corresponds to an increase in gas consumption AGr by 5%.

Claims (1)

SUMMARY OF THE INVENTION Automatic control method cyclone-vortex apparatus by changing the ratio of fuel consumption and oxidizer on each burner device and measuring the values of vibroacoustic signals on each burner device, characterized in that. in order to improve the accuracy of regulation and reliability of the apparatus, additionally measure the consumption of raw materials in the apparatus, the heat load on the apparatus and its speed changes, according to the measured values, the degree of melting of each burner device is calculated and, depending on the calculated value, the ratio of fuel to oxidizer consumption is adjusted each burner according to a fuzzy algorithm, Oxidizing agent