SU547625A1 - Device for automatic control of the drying process of bulk materials - Google Patents

Description

 % scheiism with the guide unit 2 blowers 1.0;

c) a source flow control loop containing the source material weight sensor 22 and the source material humidity sensor 23 connected to the input / xy of the secondary devices 24 and 25, respectively. The secondary device 24 codes of codes

and 25 through a convertible connected to the input of the block 26 multiply, the output of which is connected to the input of the multiplier 27 signals. One of the outputs of the signal multiplier is connected to the input 1x; the gullet 28 of the flow rate of the source material connected to the AC motor, which changes the speed of the feeder 2;

d) the fuel consumption control loop contains a thermocouple 29 connected to the electron: g. (ote-schmomet 30, the output of which Yersz zadgchik is connected to ol: -yumu pz khod - tviyjunop; i 3). consumption t (L), liv. To the other input of the p-tool to: the flow roT ViKti toklc-cm pismno ssl signals 27, Gegul tooZ soy / gn n cersz HC; IOJIIIHTi; tb ibt :; v; cx:; n) JM s.;:; s; -O1; Coy 32, assignment; for tx1uliroEi; consumption (.a;

e) the flow rate of secondary flow of the secondary Bozdukh with, | ..that the syllable bar 33 with itor- ian izgGSr: /. only 1 m p-rioor 34, syabzheg.iia rheostatny i1: t;

- go:; g1P-ShOmetg 35, to which under, cl, tsrmspara 36, mouth) s. Enna in the zone of singing the nth drying speed in; slit} 1th small fry.g:;.; material. Rmuod-- 34 to the potentiometer 35 Yudh; r1-very X to:; Odrom1-th x5u regulator 37. Which through an additional mechanism is connected with the control 38 installed at the discharge pipe of the air blower 12, designed to change the secondary air flow rate ,

The task of the gnzchenka .dla 1styti set with the help of the setting device 39.

The drying material - asbestos ore - is fed from hopper I by feeder 2 and by belt conveyor 3 through loading device 4 to the shaft dryer 5, Dried 5a material — a large fraction and separated rough concentrate of asbestos fiber — is discharged separately through unloading device 6. fuel flows continuously (fuel oil, gas). Primary air for combustion enters through conduit 9 from blower 10. Secondary air enters the gas mixing chamber through conduit 11 from blower 12. Heat carrier partially exhausted in the shaft dryer 5 passes through dryer tube 13 and exhauster 14 is discharged through dust collector (not shown) in atmosphere. The process of grief: fuel is carried out at a constant vacuum in the furnace. When changing the vacuum in the diptka the vacuum sensor. - the device 15 generates an impulse with the regulator 16, which through the actuator acts on the current smoke generator 17, thus maintaining the vacuum at a constant level. When the flow rate of the fuel gauge is changed, the flow meters 18 and 19 of the fuel oil (gas) and air drive pulses to the ratio controller 20, which affects the flow rate of the 1H unit 21 of the blower 10 and maintains the air flow in the required ratio to the fuel consumption. When changing the consumption of raw material loaded into the dryer, or its initial moisture content, the weight sensors 22 and the moisture content 23 of the source material, through their secondary devices 24 and 25, generate signals proportional to the change in the corresponding parameter. Signals proportional to the weight flow and moisture of the source material are fed to the input of block y of step 26. From block 26, a signal proportional to the amount of moisture in the material loaded into sunshine is lost: the input to the difference is 1- / skoz 1tel signals: ou 27. From one of the outputs of the rammer, the signal, propionic to the amount of moisture in the source material, is fed to the flow controller of the exodus ioro material 28, which acts on how fast, and the feeder 2 changes the material consumption in such a way that at the entrance to the dryer about-moisture at a given level. From another output of the breeding signal, the signal of the amount of moisture in the source material is supplied to o, Sch1N from the inputs of the top 31 brewer consumption regulator 31.

To another input of the regulator 31, the signal from the thermocouple 29 is supplied via an electron potentiometer 30. At the same time, the regulator 31 operates as a regulator of the cooTiiomemiH parameters: heat carrier temperature and the amount of moisture in the source material. A change in the controlled parameters causes a change in the regulating effect in the fuel consumption regulator 31, which compensates for the disturbances that have occurred, through the influence of additional regulating mechanism on the control valve 32.

Thus, a rough adjustment of the moisture content of the material at the outlet of the suction is carried out.

The precise process control is carried out as follows. A change in the moisture of the source material first results in a change in the temperature inside the mandrel and in the dryer tube, and after the delay time, a change in the moisture content of the material at the outlets of the dryer.

The impulse from thermocouple 36 is a leading impulse and is fed through a potentiometer 35 to the differentiating part of the regulator 37. The advance ensures the stability of the system and improves the quality of transients.

A smooth pulse is a pulse directly from the device 34.

The increase in humidity at the outlet of the slider is fixed by the device 34, the output signal of which is fed to the controller 37, which acts on the valve 38 in such a way that it increases