SU451007A1 - The method of controlling the process of preparation of the waste - Google Patents

Description

The invention relates to the food industry, in particular to the field of controlling the process of preparation of a rastick at molasses alcohol factories.

A known method of controlling the scribing process is to measure the temperature and density of the scattering and the flow rate of water supplied to the scattering. With the known method of control, the main process parameters: density and cost ratio are not measured accurately enough. For example, one of the simplest and most reliable methods for controlling the density of a scattering grid, the piezometric one, is characterized by an error due to the presence of air inclusions that enter the molasses during the preliminary stages of the underworking.

Pel of the invention is to improve the accuracy of control over the process of preparing the filling.

This is achieved by additionally measuring the density of molasses and determining the exact value of the density of the waste of air, the difference between the specified and exact value of the density of the waste of dust, the consumption of suspended air in the molasses, the total consumption of the waste of air, the consumption of molasses and two corrective signals; moreover, the molasses consumption is determined taking into account the consumption of water supplied for the distribution and the second correction of its signal;

2

The suspended air flow rate in molasses is determined taking into account the molasses flow rate and the first correction signal, the total waste of the rassyrope — taking into account the consumption of molasses and water supplied for the distribution, and the exact value of the sewage density — taking into account the specified molasses density of the second correction signal.

Wherein the first correction signal onredel dissolved by algebrapcheskogo summing signals proportional to the density of molasses and the exact value of molasses density and subsequent prsobrazova1P received signal and the second correction signal, - by the algebraic summing of the support unit signal and the signal proportional pzmerenpomu value plotposti rassiropki and subsequent. converting the received signal to 10 given the specified molasses density, the reference single signal, the sninal, the proportionality nogo rassironkn measured density, and the first correction sigpala.

Ma drawing shows a block diagram of a device that implements the proposed method.

The device consists of sensors 1, molasses density and 2 rasin density, water flow sensor 3, setting devices 4 exact molasses density values and 5 exact dispersion density values, block 6 selecting the first correction signal / d, block 7 selecting the second correction signal, block 8 selecting a signal that is proportional to the measured value of the density of a dissociate, block 9, the comparison of the sialal, which is proportional to the measured and exact value of the density of the dissipative, block 10, signal extraction according to the ratio of the costs of molasses, the air flow determination unit 11, the signal extraction unit 12 according to the total expenditure of the rassyropka, the information output unit 13 and the temperature sensor 14.

The signals from setpoint 4 and sensor 1 arrive at block 6, where by algebraically summing the signals, the proportional molasses density and the exact value of the molasses density, and then converting the resulting route-multiplication signal to the signal that is inversely proportional to the signal from sensor 1, the first correction signal / Ci. The output signal of the block b, together with the signals from sensor 2 and setpoint 4, goes to block 7. In block 7, a reference unit sigal is formed, the algebraic summation of the signal from sensor 2 with the supported single signal is made, and the second correction signal / Sz is selected.

The signal from the output of block 7, together with the signal from setpoint 4, enters block 8, where the algebraic summation of the signal from setpoint 4 is performed with the reference unit signal, the result of the summation is multiplied by a factor proportional to the signal originating from block 7, and the result is algebraically summed conversion with a single reference signal.

The output signal of block 8 is the exact value of the density of the splicer. The signals from block 8 and master 5 are received in block 9, where they are algebraically summed. The output signal of block 9 is equal to the difference between the set and exact values of the density of the shreds and enters the information output unit 13, from where it can be removed for use in the control system. Signals from the output of block 7 and sensor 3 arrive at block 10, in which a signal is formed inversely proportional to the algebraic sum of the correction sigial Kz, the result is transformed by multiplying by a factor proportional to the signal Kz with a weight similar to the normal signal from the output of sensor 3.

The output signal of block 10 is proportional to the consumption of molasses and is supplied to the inputs of blocks 11, 12 and 13.

In block 11, the output signal of block 6 (signal / Ci) arrives at the same time as the signal from block 10, as a result of which a signal proportional to the consumption of mold air in the molasses is released. The signal enters the block 13 information output.

Block 12 receives signals from the output of block 10 (molasses consumption) and sensor 3 (water consumption). The signals are algebraically summed, and the output of the sigal of block 12, which enters block 13, is proportional to the total expenditure of the raceroika.

The signal from the temperature sensor 14 is supplied directly to the information output unit 13.

The result of the operation of the blocks is approximately expressed by the following formulas:

t Tm Tmp

block 6

/ one -,

Tmp

7

Tm 1 + Tpn-A i 8

Tr (Tm-1) .4-1,

1 10

, -K,

1-HA

11 Gor,

GE GM + G; ,, 12

where YM is the specified value of the density of molasses;

7mp - the exact value of the density of molasses;

Ypn is the set value for the scatter density;

YP-exact value for scattering;

GM - molasses consumption (without air);

Gb - water consumption;

GOT - air flow in molasses;

GZ is the consumption of the scattering (without air).

The output signals of unit 13 in terms of density and flow rates are more accurate than the known method: the error from the presence of suspended air in molasses, as well as other methodological errors in the density measurement, are eliminated. With the limited number of sensors, the proposed method allows determining almost all process parameters.

Subject invention

1. The method for the coptrol of the scribing process, which consists in measuring the temperature and density of the scattering and the flow rate of water supplied to the scattering, characterized in that, in order to improve the control accuracy, the molasses density is additionally measured and the difference of the sprinkler density is determined, the difference between the specified and the exact density of the scattering density, the suspended air consumption in molasses, the total expenditure of the debris, the consumption of molasses and two correction signals, and the consumption of molasses is determined taking into account the consumption in Odes, iodized by the scattering, and the second correction signal, the flow of suspended air in the molasses is determined taking into account the consumption of molasses and the first