SU970069A1 - Method for automatically controlling cooling of materials in grate cooler - Google Patents

Description

fishing At the same time, in some areas of the layer of material-low height, an air-flow occurs with increased consumption. In this way, an uneven cooling of the material occurs and the recuperative heat of the material deteriorates. The purpose of the invention is to ensure the uniform cooling of the material in. increase heat recovery in the grate cooler. This goal is achieved by the fact that in the method of automatic regulation of the process of cooling materials in the skimmer cooler by changing the speed of rotation of the electric drive, the grid in accordance with the speed of rotation of the furnace is preliminarily measured at different speeds of rotation, the current SLR, (Pr) of the electric grid, not The loaded material, and the rotational speed (Pr j and current (3p.) of the electrically driven grating loaded with the material with the height of the bed, then measured during the operation of the grate cooler the current values of the fckopocTH ruling (Pr) and current (Cp) of the electric drive are measured, the set value of the rotational speed of the electric drive of the grille (n |) is calculated by hi-n ViilV and the difference between the measured and specified values of x; the speed of rotation of the electric drive and the value found changes the speed of the electric drive to grow until the calculated difference of the difference is 0. The height of the layer of material on the gratings of the refrigerator can be determined from the 3p-Jp p) h | - height. a layer of material, K -); JP - load current electrically and grids; ZrtsSPr) is the current of the electric drive of the grid with unloaded material Pr is the speed of the electric drive of the grid, at the time when the height of the layer of material on the grids of the cooler corresponds to the specified values (P-UK) 113 () it is possible to obtain iPlV (Mj, Subsequently, in order for the height of the layer of material on the lattices of the hollower to be unchanged (LHH,), change the speed of rotation of the electric drive of the lattice so that o) p p5jo;) In the drawing and A functional diagram of the implementation of the proposed method for automatically regulating the process of cooling materials and the grate refrigerator is depicted. The oven 1 contains a rotation speed sensor 2, a movable grid 3, an electric cooler 4 and an electric drive 5. To measure the rotation speed of the electric drive 5 SERVICE sensor b, a1 "a. The sensor is a sensor 7. The outputs of the DIs b and 7 are connected to the computing device 8. In addition, the output of the sensor 6 is connected to the regulators 9 and 10. The outputs of the sensor 2 and the regulators 9 are connected to the adder 11. The input of the regulator 10 is also connected with output of the dispenser 11, and the output with the electric drive 5. The cooled material flows from the rotation of the furnace 1 to the movable grid 3 of the refrigerator 4. When the rotational speed of the furnace of the proportional ratio regulator 10 changes, the rotational speed of the electric drive 5 changes If at a constant speed vrash In the furnace, the change in pa occurs, the material is removed from the furnace to the grate COOL.71Nikik, there is a change in the load current of the grid drive 5 of grid 3. The speed of load measured by sensor 6 and sensor 7 of grid 4 are transferred to the computer 8, which calculates the required rotational speed of the electridrive. Signals proportional to the required speed from the computing device 8 and the measured rotational speed of the electric drive from the sensor 6 are fed to the input of the regulator 9. The output signal of the regulator, 9, is proportional to the difference between the required and measured rotational speeds of the electric drive of the PDR, and is added to the adder 11, where with a signal from sensor 2. The signals from sensor 6 and adder 11 are fed to a ratio controller that changes the rotational speed of the electrolux until the desired speed is set. electric drive. At the same time. The change in the rotation speed of the furnace D and the load current of the electric drive 5 is controlled by analogy with that described and stops at the same sign of the coincidence of the actually measured speed of the rotating drive with the computational device 8 required for the speed of rotation. The use of the proposed method makes it possible to reduce fluctuations in the height of the layer of material along the length of the Inca refrigeration unit.

As a result, the uniformity of cooling of the layer and temperature is increased, and the magnitude of the fluctuations in the temperature of the material at the outlet of the refrigerator is increased. This improves the working conditions of the material crusher as well as the material conveyor. In addition, the heat generated by the rotary kiln is increased. This; (Economy of fuel is being burned for burning the material in a rotary kiln. Economic efficiency is 20 thousand rubles a year. Formula of the invention

A method for automatically regulating the process of cooling materials in the grate cooler to the ways of changing the rotational speed of the electric drive of the grid in accordance with the speed of the furnace. The ice TfH, which, in order to ensure uniformity of the cooling of the material, and increase heat recovery in the grate refrigerator, is preliminarily measured at various speeds of rotation, the current of the grid drive drive 9eq, not loaded with material, the rotational speed and current of the grid electrical drive, the loading material is measured trailable

layer, then during operation of the grate cooler, the temperature and rotation current of the grid electric drive are measured, the given value of the speed of rotation of the grid electric drive is calculated using the formula

3p-jpxtnp)

nl.no

s -DzDl «)

j is the speed of the rotation of the electric drive lattice, C,

- the speed of rotation of the electric drive of the grid loaded with the material with the required layer height, C,

.- the current value of the load current of the electric drive of the grid,

V V i "pl of the electric drive p € nets, not loaded by the material, at speeds (current and load current of electric drive; ° water of the lattice at the speed of the load P n the required height of the layer A,

then calculate the difference between the measured and the set values of the rotational speeds of the electric drive and

According to the values found, the speed of the drive of the lattice is changed until the calculated range reaches the zero value.

Sources of information taken into account in the examination

1. Gieseling O. Statistical tools monitor kiln Operation - liock ducts, 1961, V. 64, - I 8.

A 2 Nobuyoshi Iski, Isao Abe. Controlled by computational tools in the cement industry. Fuji Eziho, 1970, vol.43, I 6, p.103113.

defect original;

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Claims (2)

SUMMARY OF THE INVENTION A method for automatically controlling the process of cooling materials in a grate cooler by changing the rotational speed of the grill electric drive in accordance with the rotational speed of the furnace, which consists in that, in order to ensure uniform cooling of the material, and to increase heat recovery in the grate cooler, measure at various speeds of rotation the current of the electric • drive of the grate not loaded with material, measure the speed of rotation and current of the electric drive of the grate, angling pictures with a desired height and then calculating the difference between the measured values of n predetermined rotation drive sko30 growth and the values found for the rotational speed change of the lattice to achieve electric nulevogr calculated difference values. —Sources of information taken into account in the examination 1. Gieseling D. Statistical tools monitor kiln Operation-Rock- Products'! 1961, v. 64, ·· and 8. D 2, NobuLsi Iski, Isao Abe. Computing control in the cement industry. Fuji Eziho, 1970, v. 43, I 6, p. 103113. defect to the original {Compiled by G. Demin