SU1013727A1 - Method of control of clinker cooling process in bar refrigerator - Google Patents

Abstract

A WAY OF COOLING THE CLEANER OF A CLINKER IN A COLOR REFRIGERATOR by measuring the temperature of the aspiration air and the water flow in the upper lattice space and the flow rate depending on the temperature of the aspirated air, in order to improve the accuracy of the control unit, another would have another. clinker pieces coming in it. at the entrance of the refrigerator, the speed of the grate is determined, to which water is supplied, in inverse proportion to the average size of the clinker pieces, the time of movement of the clinker from the entrance to the REFRIGERATOR to the water inlet zone is determined, after the expiration of which the previously determined speed F is set grate.

Description

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The invention relates to the production of building materials in furnaces with grate coolers, for example, in cement industry.

The closest to the proposed invention in terms of technical essence and achievable re-tattoo is the method, which includes supplying water to the superlattice of the refrigerator, measuring the temperature of aspiration air and water consumption, and the change in water consumption depending on the temperature of aspiration air tij.

However, controlling the flow rate of water according to this method does not provide the necessary cooling of the clinker (up to. 10 0-15 O s) with an increase in the average size of the pieces, since the measured temperature reflects only the surface temperature in the clinker layer, while the internal temperature of the clinker pieces, for large pieces, well above the surface. In addition, with a large particle size distribution of clinker, the surface of the layer is reduced, which reduces heat transfer and reduces the temperature of the aspiration air, as well. hence the water supply. Consequently, with the described control method, large clinker will exit the refrigerator hot, which adversely affects the conditions of transportation, storage and grinding.

The aim of the invention is to improve the accuracy of control.

The goal is to reach. According to the method of controlling the cooling process of clinker in the grate cooler by measuring the temperature of the aspiration air and the flow of water into the superlattice space and changes in the water flow depending on the temperature of the aspiration air, the average size of the pieces of clinker entering the inlet of the refrigerator is also determined the speed of the grate, to which water is supplied, inversely proportional to the average size of the pieces of clinker, determines the time of movement of the Kli Kera from entering the refrigerator to supply water zone, which is set after the elapse of the previously determined value of the grate speed.

It is known from the theory of heat transfer that the cooling time of spherical bodies (pieces of clinker can be attributed to them) during convective heat transfer depends on the ratio of their volume to the surface and temperature.

The surface temperature increases with the diameter of the bodies. Therefore, in this method, to increase the control accuracy and provide the necessary cooling of the clinker for all fluctuations in the working range of the average size of the pieces, the residence time of the clinker in the water cooling zone is varied using the movement of the collar. Modern spikes peak coolers have several grids arranged in series along the length of the cooler, on each of which the required speed of the grids can be set. The travel time of the clinker is determined by the speed of the grid. Since, in practice, the average size of the pieces is more convenient to determine at the Inlet of the refrigerator, and cooling water is supplied to the last grid, this method takes into account the time the clinker moves from entering the refrigerator to the water supply area and after this time has elapsed, change the speed of the grate. "

The method is carried out as follows.

Water is fed into the superlattice space of the latter (in the direction of clinker movement) of the fridge behind the separation zone of the secondary and aspiration air towards the cold end of the fridge.

The experimentally determined the speed of the grate, water grating, on the size of the clinker pieces. The dependence is determined from the condition of ensuring the cooling of the clinker and the output of the cooler according to the operating conditions. This dependency is inversely proportional. The temperature of the aspiration air is measured and the flow rate of the water is changed in proportion to the temperature of the aspiration air so that any changes in the clinker parameters on the grid will ensure complete evaporation of the water and no cementing of the clinker will occur. The size of the clinker pieces at the entrance to the refrigerator is measured. The lattice velocity at which water is supplied is determined by the previously found dependence on the size of the clinker pieces. The time taken for the clinker to advance from the entrance to the refrigerator to the water inlet zone is determined, for example, by measuring the speed of the individual gratings of the refrigerator. After this time has elapsed, a previously determined velocity value is established for the grate to which water is supplied. Let the size of the pieces increase. Then at the time of these pieces in the cooling water zone of the legs will be reduced. The speed of the grate and their residence time in the water cooling zone will increase. Similarly, when reducing the size of the pieces, their residence time in the water oh. Love is reduced. This will provide a way out of the clinker cooler with a practically unchanged average temperature.

. This arrangement ensures favorable conditions for the transport, storage and storage of clinker. EFFECT: saving of electricity consumption for grinding of clinker and reduction of costs for repair of clinker conveyors and equipment of clinker warehouses.

To determine the average size of the clinker pieces, the A-343-Ch110 device manufactured by the Leningrad NPO Teplopribor is used.

The drawing shows a device that implements this method.

The device consists of a cooler 1, a fan 2 with a common duct 3, an aspiration air duct 4, a water supply pipe 5, a water flow sensor 6, an aspiration air temperature sensor 7, a water flow regulator 8, an actuator 9 and a water flow regulator Id , a common air flow sensor 11, a pressure sensor 12 in the first chamber of the sensor 13 .t0k of the load of the hot grid, a unit 14 for determining the average size of the pieces, a functional element 15, speed sensors 16 and 17 are different and cold. grids, functional element 18, cold lattice speed regulator 19, delay unit 20, actuator and cold lattice speed regulator 21.

The device works as follows.

clinker 22, water through pipeline 5 and air through duct 3 from fan 2 enters refrigerator 1. Yo signal € Ts1U sensor 7, air flow tsegos in air flow 4 and sensor b, regulator 8 using an operating mechanism 9 and a lumbar organ 10 changes the water flow in the pipeline 5.

Block 14 produces the definition

o the average size of the pieces from the signals of the sensors 11–13. Preliminary on experimentally determine the dependence of the speed of the cold lattice necessary for cooling the cliquer

5 from the average size of the pieces and this dependence is implemented in the functional element 15. Sigals from the output of the element 15 and from the sensor 17 are fed to the input of the regulator 19. Siggsh; the sensor 16 is fed to the input of the fuction element 18, where in equilibrium.

eleven

bridges from the speed of hot

and cold grids determine the time the clinker progresses to the water supply point and convert it to

5, the corresponding proportional signal, which is fed to the input of block 20, varies accordingly with a lag time in it. Signal from output 19 after the appropriate expander

0 in the block 20 is fed to the input 21 and at the same time the necessary value of the speed of the cold lattice is established. Let the signal from output 14 increase, which corresponds to the increase

5 medium sized pieces. Then, when quietly the pieces arrive at the point of water supply to the Refrigerator, 1 reduction of the speed of the lattice and the residence time take place.

boat

40 clinker in the water cooling zone will increase.

Similarly, as the size of the pieces decreases, their residence time in the H water cooling zone will decrease. 45 This will de-fuse the exit from the fridge. clinker with almost unchanged average temperature. . b yu

Claims (1)

METHOD FOR CONTROLING THE CLINKER COOLING PROCESS IN THE GRAIN REFRIGERATOR by measuring the temperature of the suction air and the flow rate of water into the superlattice and changing the flow rate of water depending on the temperature of the suction air, distinguishing by the fact that, in order to improve the control accuracy, the average size of pieces is additionally measured clinker arriving at the entrance of the refrigerator; determine the speed of the grate, to which water is supplied, inversely proportional to the average size of the clinker pieces, determine the time of movement of the clinker from the entrance to the refrigerator to the water supply zone, after which the previously determined speed value of the grate is set.