SU1165706A1 - Method of automatic control for process of obtaining coal-tar high-temperature pitch - Google Patents

Description

1. 1 The invention relates to the management of the production of high-temperature pitch in reactors and can be used in the coke industry. A known method of controlling the production of high-temperature pitch is based on regulating the supply of components of the raw material and controlling the temperature regime in the reactors by changing the air supply D I. The disadvantage of the method is the lack of control over the distillate supply, which reduces the performance of the coke ovens. The closest to the invention to the technical essence and the achieved result is a method of automatically controlling the process of obtaining high-temperature coal tar pitch in reactors by adjusting the supply of medium-temperature pitch and pitch resin mixed with pitch distillate depending on the level of the product in the final apparatus of the technological circuit. with a simultaneous change in the air supply, in the reaction, depending on the consumption of the components of the feedstock, the temperature and density of the medium temperature ka, the liquid phase temperature in the reaction tori high temperature and density of the pitch C2 iJ. A disadvantage of the known method is the lack of regulation of the supply of pitch distillate, which causes a fluctuation in a wide range of swelling of high-temperature pitch and reduces the productivity of pitch-coke ovens. The aim of the invention is to stabilize the expansion of the high-temperature pitch and increase its loading into the chambers of the coke-oven furnaces. This goal is achieved by the fact that according to the method of automatic control of the process of obtaining coal high-temperature yek in the reactors by adjusting the supply of medium-temperature pitch and pack resin in a mixture with pitch distillate depending on the level of the product in the terminal l of the technological circuit with a simultaneous change of supply air into the reactors depending on the costs of the components of the feedstock, the temperature and density of the 06 medium temperature pitch, the temperature of the liquid phase in the reactors and The densities of the high temperature pitch additionally regulate the flow of the pitch distillate to the pitch resin in direct proportion to the density of the medium temperature pitch. The drawing shows a scheme for implementing a method for controlling the process of obtaining a high-temperature pitch. The feedstock is fed to the reactor 1 and, treating it with air, receive high-temperature pitch at the outlet of the final peaijTopa 2 technological chain. The flow rate of the medium temperature pitch is regulated by means of a circuit consisting of a medium temperature flow sensor 3, a regulator A and a valve 5. Similarly, the flow rate of the pitch resin mixed with the pitch distillate is controlled by the circuit consisting of a mixture of 6 cm torus 7 and valve 8, installed in parallel with pump 9, under a demux of resin and distillate from collector 10 into a tube furnace 11, and then into the first reactor. The air supply to the first reactor is controlled by a circuit consisting of a flow sensor 12, a regulator 13 and a valve 14. Similarly, the air supply to other reactors of the technological circuit is also regulated. At the same time, the required task for air flow in each reactor is determined by a computing device (unit) 15, to the input of which signals are received from the flow rates of the medium temperature pitch and of the cold distillation mixture, as well as the temperature sensor 16 and the density sensor 17 of the medium temperature pitch. The values of the air flow for each reactor set by the computing device are supplied to the correctors 18 and 19, which also receive a signal from the liquid-phase temperature sensors in reactors 20 and 21. The output signal of the correctors is fed to the inlet of the air supply controllers to the reactors. For the final reactor of the technological circuit, a signal from the sensor 22 of the high-temperature pitch is also supplied to the input of the corrector. The matching of the flow rate of the high-temperature pitch with the feed of the initial 31 cf is carried out by means of the pitch level sensor 23 in the final reactor and the regulator 24 connected with the output to the input of the flow regulator of the initial pitch. The ratio of the flow rates of the initial pitch and pitch resin in the mixture with the pitch distillate is implemented by means of block 25, the flow of ijeKOBbK distillates is controlled by means of a circuit consisting of a flow sensor 26, a regulator 27, a valve 28 and a correction regulator 29, associated with the density sensor of the medium temperature pitch. The method is implemented as follows. When the density of the incoming medium temperature pitch changes, causing changes in the expansion of the high temperature pitch, automatically by means of the regulator 29, bound input to an output of the sensor 17 of medium density pitch, there is a corresponding correction of pitch flow distillates by vfa eniyu wherein G G. G - raskhod.pekovogo distillate, kg / s; C. - initial distillate flow 064 K - correction factor equal to .0.0055 m / s. The feed components are supplied to the reactors depending on the need for the high-temperature pitch by stabilizing the level of this product in the final reactor of the technological chain. In this case, the setting of the temperature of the medium-temperature pitch is changed with the help of the controller 24, and the flow of the pitch resin mixed with the pitch distillate is adjusted in the specified ratio to the flow of the medium-temperature pitch using the block 25. At the same time, the required values for the supply of air to the reactors are determined by means of the computing unit 15, depending on the expenditure of the components of the initial process, temperature and density of the medium-temperature pitch. For each reactor, the calculated task for air flow is adjusted by the temperature of the liquid phase, and for the final reactor also by the density of the high-temperature pitch. The magnitudes of the correction of air supply with changes in the technological factors, calculated by block 15 and equalizers 18 and 19, for example, for

Lowering the density of the high-temperature pitch by 1 kg / m

3.9

five . 1165706.6

The invention allows for temperature pitch as well.

ensuring optimal mode to increase its load in the camera

high-temperature pekokoksovaniya, increase producer in the reactors to prevent alterations of pekokoksovyh furnaces, eliminate

the swelling of this product due to pitch emissions from chambers and reducing

changes in the flow rate of the raw material of the gas content of the air basin. Stabilization of swelling is high.

Claims (1)

METHOD FOR AUTOMATIC CONTROL OF THE PROCESS FOR PRODUCING STONE COAL HIGH-TEMPERATURE PITCHES in reactors by controlling the supply of medium-temperature pitch and pitch pitch mixed with pitch distillate depending on the level of the product in the final apparatus of the technological chain with a simultaneous change in the flow rate of the components in the reactors and the flow rate of air in the reactors the density of the liquid phase in the reactors and the density of the high-temperature pitch, distinguished by the fact that, in order to stabilize the expansion of high-temperature eraturnogo pitch and increase its loading chamber in coke-pitch furnaces, further regulate the rate of pitch distillate pitch resin directly proportional to the density of medium pitch. »1165706