SU763447A1 - Device for automatic control of technological conditions of coke dry quenching unit - Google Patents

Description

The purpose of the invention is to increase the efficiency of operative control of the technological modes of the CT, KU and the CDCP unit, which will allow them to maintain their optimal technological modes as well as the CDCP safety more timely and reliably. This is achieved by the fact that the device additionally contains sequentially connected units measuring the increments of oxide and carbon dioxide in the circulating gas, the differential pressure of the circulating gas on the exhaust fan, the number of coke loads, and the units for calculating the flow rate of the circulating gas, the amount of heat contained in the cooled coke, the amount of heat in the circulating gas, if there is an honest heat in the superheated steam, and the output of the unit for calculating the amount of heat in the cooled coke is associated with the units for calculating the efficiency of the quenching chamber and all its coke dry quencher unit, the output of the unit for calculating the amount of heat in the circulating gas is connected to the power units of the chambers chamber and the waste heat boiler, and the output of the unit for calculating the amount of heat in the superheated steam is connected to the units for calculating the efficiency of the utilizing boiler and the whole unit of the dry unit quenching coke. FIG. 1 is a block diagram of the device; in fig. 2 - measuring and computing scheme. The device for automatic control includes an information-measuring unit A containing a unit for measuring the number of loads of CT 1; a unit for measuring the CO 2 content in the circulating gas at the inlet to the CT; a unit for measuring the content of CO 3 in the circulation gas at the outlet of the CT; node ÜE g Ck-tK where n is the Hourly load rate of the chamber, the amount of coke at one load, is the heat capacity of hot coke, the temperature of hot coke, C is the flow rate of circulation / H-Pa; foot gas

p p 11 g

respectively, the pressure of the circulating gas after and before the exhauster,

Kd.X are the coefficients, respectively, characterizing the yield of COij and CO during carbon combustion, li is the coefficient taking into account the

pure carbon in coke; . respectively, the increment of CO2 in the circulation gas after CT1

due to coke burn,% J

where c

".

jt - respectively heat capacity

recirculated gas before and after the chamber is quenched taking into account temperatures ..

In the computational unit D, the formula for determining the amount of heat in the superheated steam is realized;

OV)

Measuring the content of CO 4 per 1 well of ionic gas at the inlet to the CT; took into account measurements of the CO content, 5 in a circulating 1-well gas at the outlet of the CT; differential measurement unit 6 on the exhauster; temperature measuring unit 7 of circulary gas at the inlet from the CT; a temperature measuring unit 8 for the injection gas of the CT; flow measurement unit 9 of superheated steam generated; temperature measuring unit 10 of steam at the inlet of KU; a coke temperature measurement unit 11 in the area of skew CT moves. The unit also includes information-transforming elements 12-22, which allow to take into account a number of constant coefficients: block B - calculation of the amount of heat contained in the hot coke coming into the QD, taking into account its intoxication; Block B - calculation of the amount of heat contained in the circulation ra-j; at the exit of CT; Block D - calculation of the amount of heat contained in the generated steam; unit D calculation of the thermal efficiency of the chamber; block E - calculation of thermal efficiency KU; Block Ж - calculation of the heat engineering efficiency of the CDCP unit. The outputs of nodes 1-11 and elements 12-22 of block A are respectively connected to blocks B, C, and G. Computational block B implements the formula for determining the total amount of heat entering the booster chamber with hot coke and released during coke burnout in QT Q. BH l 37. to or. SRGR.M 4 FS05 L} CHK 0o / - trppotkppn gpp-pinpgt wnwrn О, - is the calorific value of coke, In the calculating block B, the formula for determining the amount of heat in the circulating gas at the outlet of the QD is realized. .1Pgr.) - Sak-1ch.-s - :: b „where n; ipa, kg / h; d - vapor enthalpy, q .; al / kg; In the range of operating temperatures of 350-490 ° C and operating pressures of 3.1392-3.5316 MPa, vapor enthalpy is approximated with sufficient accuracy by the linear dependence of the form,. In view of the above, the amount of heat in an overheated iar will determine Q. n-fbi H, (VJ) The outputs of blocks B and C are fed to a computing unit that determines the efficiency of the extinguishing chamber

"RC.-t, .lP, -P.). 4hco / pJ 4K

The outputs of blocks C and D, which determine the amount of heat in the circulating gas and the output of blocks B and the amount of heat in the chambers, are given. This automatic efficiency control system is implemented on the devices of the ferrodynamic system of the Kharkov Instrumentation Plant, which is the most common at metallurgical plants of the Union. When implementing computational operations, necessary for calculating functions using formulas VII – IX, computational operations of algebraic summation, multiplication, and division were used. To measure the thermal efficiency of the extinguishing chamber (Equation 7), the following measurement and computational scheme has been developed (see Fig. 2). The variables are: the number of CT loads; pressure before and after the exhauster; circulating gas temperatures before and after the exhaust chamber; temperature of hot coke; increment due to carbon monoxide in the CO and CO ™ gas after the quenching chamber. The numerator of formula VII is implemented as follows. The circulating gas temperatures at the outlet and inlet of the CT are measured by thermocouples 23, 24 and potentiometer 25. Thermocouple 24 through voltage divider 26 and thermocouple 23 are connected in a differential circuit.

cxio

Claims (1)

heated pair, are supplied to the computing unit E, which determines the efficiency of the 11RgPa boiler-expander) Sak (T, determining the volume and boiler .c, -Cu ,,) 1.Dd (p n-fb (I Cc. The utilizer is supplied in block Ж, which determines the efficiency of the entire installation as a whole. P- (L (H,) J K5 Co / K 4 At the output of potentiometer 25, a signal is formed that corresponds to the expression (19, that goes to the device 27. Formation of a signal proportional to the expression CETC "() Of formula VII is as follows. The pressure drop at the exhauster, measured by differential pressure gauge 28, is applied to the secondary device 29. On the secondary A recirculated gas flow rate is recorded in the device with the outlets of the device 29. One of the output signals of the flow meter is transferred to the secondary device 27 using the .30 unit, which multiplies it with a signal proportional to (5. Scale of the device, calibrated in units of heat, and shows heat of the circulating gas. Thus, the secondary device 27 indicates the amount of heat accumulated in the circulating gas and produces a signal proportional to the numerator of formula VII. The denominator of formula VII is implemented as follows. The temperature of the coke in the slanting chambers of the quenching chamber is measured at four points by a single cross section by thermocouples 31, 32, 33, 34, 77 connected successively and connected with a voltage separator 35 with a secondary device 36. The number of loads of coke per 1 hour is measured by a pulse counter 37, consisting of a limit switch, elements of analog-digital means of the Spectrum-4 complex system. input matching element; binary counter; analogue code converter; voltage divider, power supply unit. Converter 38 multiplies the output signal. The secondary device 39 is measured by the block 40 and taking into account the number of loads, the amount of heat that comes into the chamber with hot steam, i.e. the first term of the denominator in the formula VIi. The second term in the denominator, which is the arrival of heat in the quenching chamber due to coke burn, is measured as follows. The increment in the circulating gas of the volume quantities of CO and CO after the quenching chamber is measured respectively by differential gas analyzers 41, 42. The coefficient set on the setting unit 43 by means of block 44 is multiplied with on the secondary device 45 and added to the component on the secondary device 46 Circuit flow rate 1 .Y () of this gas, measured in device 29, taking into account the coefficient produced KOL C}. by means of block 47, it is multiplied with a signal proportional to the value (5/4 o) on the secondary device 48, which measures the amount of heat additionally received in the quenching sea as a result of coke tar. The total amount of heat accumulated in the QD is measured by the secondary device 49. To obtain the quenching chamber efficiency, the numerator of the Vile formula is using the unit 50 divim G denominator. On the secondary device 5, we obtain the final result, expressed in% The numerator of formula VIII is provided as follows. The vapor temperature is measured by thermocouple 52 and potentiometer 53. Steam consumption is measured by diaphragm 54 with condensation vessel 55, secondary device 56 using block 57. The coefficient A / b, set on the setting unit 58, is added to the signal tj, on device 59. The signal proportional to the consumption of steam Qp with regard to B, multiplied with () and the secondary device 60. The device shows the amount of heat contained in the pair. The amount of heat contained in the state and the pair, with the use of spores; 60, by means of block 61, is divided by the amount of helium that has been vibrated in KU with shirculation gas and using the instrument 27 on the secondary device 62 in order to calculate the efficiency of KU. The output from instrument 60 is divided by block 63 into the total amount of heat in the CT on the secondary device 64, indicating the efficiency of the entire installation. This ACK is the first step in the development of an automatic control system for a CDCP. It provides operational automatic control of the technological mode of the CDCP unit; timely and necessary information about the rhythm of the operation of the CDCP unit and its main aggregates; timely decision making to increase heat removal and prevent the occurrence of limiting emergencies. Apparatus of the Invention A device for automatic control of the technological mode of a coke dry quenching plant, comprising units for calculating the efficiency of an extinguishing chamber, a waste heat boiler and a plant as a whole, units for measuring temperatures of coke, circulating gas, superheated steam, consumption of superheated steam, units for calculating the amount of heat in mountains than coke, circulating gas and produced steam, characterized in that, in order to increase the efficiency of operational control and ensure the safety of operation of the unit of the dry stew installation and coke, it additionally contains successively connected units for measuring the increments of oxide and carbon dioxide in the circulating gas, the pressure differential of the circulating gas at the exhaust fan, the number of coke loads, and also the units for calculating the flow rate of the circulating gas, the amount of heat in the cooled. coke, the amount of heat in the circulating gas, the amount of heat in the superheated steam, and the output of the unit for calculating the amount of heat in the cooled coke is associated with the units for calculating the efficiency of the quenching chamber and the entire unit dry quenching of coke, the amount of heat output calculating unit in the circulating gas connected to the extinguishing chamber units kotlautilizatora and efficiency, and the output heat quantity calculating unit in superheated steam connected to the calculating unit kotlautilizatora efficiency and total pack mounting dry quenching of coke. Sources of information taken into account in the examination 1. USSR author's certificate in application N «1933658/26, cl. From 10 to 39/00, 08/31/76.