SU625195A1 - Combustion process control device - Google Patents

Description

(54) DEVICE FOR CONTROL OF THE PROCESS - COMBUSTION

Iaofegeiiii refers to the emergency practice of pre-burning fuel, in various furnaces of various fences.

There are known devices for controlling combustion burning process i, 2}. However, these devices have a significant time to reach the mode and poor accuracy in controlling the temperature of the combustion.

The closest to the invention technical solution is a device for controlling the combustion process, containing a pyrometer, carrying a low-power fuel consumption pinch, an amplifier and a stationary sensor, the output of which is connected to the normal one of the regulator control inputs, the input of which is connected to the air flow sensor , and access to the first actuator; To the upstream input of the remote control unit, the second execution mechanism, optima “zatsf and divider CPD, are sequentially connected.

The temperature of the plume is optimized for couples, the maximum of which characterizes the optimal fuel combustion and the required amount of air for combustion. However, when the static characteristics of the optimization object drift, there is a decrease in the quality of search for optimum, i.e. torch temperature.

Normal) drift of the static characteristic of an object is caused by changes in the mode of operation of the aggregate. To these changes, oi carries oscillations of the heat load of the unit, changes in the characteristics of the smoke tracks, fluctuations in the caloric content of the fuel, etc. All this causes fluctuations in the length of the flame, and as a result, instability of the static characteristics of the optimization object.

The aim of the invention is to improve the accuracy of maintaining the combustion temperature.

Claims (3)

This is achieved by the fact that the known device contains a mechanism for moving the pyrometer's axis of sight, a block of vigilance and a signal distributor, the input of the cortex is connected to the output of the pyrometer, and the outputs are connected to a divider and tracking unit, which is connected with the mechanism for moving the axis of sighting of the pyrometer . The drawing shows a block diagram of a combustion control device. The pre-burned device contains a pyrometer 1, installed in its own furnace 2, mechanism 3 for moving axis 4, sighting at bcap of paképa 5, bpok of spinning 6 for tromra 7 of fakep, distributor of signaling 8, healer 9, optimizer U, actuator of the optimizer 11, cystaney sender 12, amplifier 13, fuel flow sensor 14, mounted on the fuel line 15, ratio controller 16, air flow sensor 17, located on the air duct 18, actuator 19, controlling the air damper. The described device operates as follows. The signal from the ferrodynamic fuel consumption sensor 14, mounted on the fuel line 15, is proportional to the fuel consumption, is fed to the seat 13, to the output of which is connected the excitation circuit of the remote ferrocynamic setting unit 12. The signal of the ferrodynamic setting sensor of the setting device 12 is compared to the voltage on the flow sensor sensor 17. Signal vaults are fed to the input of the ratio controller 16, which through the actuator mechanism 19 acts on the damper installed on the duct 18 and changes t airflow drive it into conformity with fuel consumption and a predetermined coefficient adjuster 12 iz. bull of air. The input value of the automatic optimizer 1Q is the temperature of the core 7 of the flame 5 in the fiery furnace 2, measured using a radiation pyrometer 1. With the core of the core 7 of the flame 5 stable, the signal from the pyrometer 1 goes to the signal distributor 8 and from it to the input of the block tracking 6, which controls the mechanism for moving the axis of sight 4 and is in self-oscillating mode. Since the tracking unit is intended to find the kernel 7, Fstept 5, i.e. areas of the maximum. his work, then its operation is similar to the principle of operation of onniKffiaaTqpa 1О. Oriental noise. Here are the results: the position of the core 7 of the fake 5, the firing unit 6 controls the mechanism 3 for moving the axis of the sight 4 of the pyrometer And looks for a new position of the axis of sight 4 of the pier 1, corresponding to measuring the temperature of the flame 7 of the torch 5. 5. Find the search engine for search. Tracking system re-crawl to auto-freak mode, outlined cyclic reversal of travel of mechanism 3 for moving the axis of sight 4 of the pyrometer 1 in the cof 7 zone of the torch 5. The process of searching and jogging behind the core 7 of the torch 5 by the tracking unit 6, followed The result of which is that the copeater nature of the outgoing signal of the pyrometer 1 does not contribute to critical interference and does not improve the quality indicators of the system as a whole. This is guaranteed by the fact that, first, the time of the object of spinning behind the rom 7 is 0.5 sec, and nya vro- the object of optimization is not less than 10 seconds, so that the dynamics of the tracking contour may not be taken into account; secondly, the oscillation frequency of the readings of the pyrometer 1, which is in the self-oscillating mode of operation of the tracking unit 6, lies in the high-frequency region, and in fact is filtered by the optimization object itself. The second output of the signal distributor 8, which corresponds to the temperature of the core 7 of the torch 5, tracked by tracking unit 6, goes to divider 9. The output signal of divider 9 is fed to the input of optimizer 1O. The optimizer U controls the actuator 19, with which the frame of the remote ferrodynamic setting unit 12 is rigidly articulated. When moving the frame of the detector, the change of the coefficient of excess air. Moving the frame of the sensor 12 in the search process, the optimizer 1O searches for the optimal coefficient of excess air. Improving the quality of optimization of the combustion process in the event of various interferences increases the accuracy of maintaining the temperature of the combustion. Claim device A combustion control unit comprising a pyrometer, a successively connected flow sensor for the PLUV, an amplifier and a remote sensor, the output of which is connected to one of the inputs of the ratio controller, the other input of which is connected to the flow sensor qa air and output to the first performance driver. iekakpamu to the second in & dstantion datsagchika pokklhpeTemy prospetsovochenno sotsinennye second isopnitnny mechanism, optimizer and healer, because of the fact that devices, duo mechanism for moving the axis of vision of the pyrometer, bpok tracking and spreading signals, which went to the pyrometer output, and the output to the healer and tracking unit, the output of which is connected with the mechanism for moving the pyrometer's axis of sight. Sources of information taken into account in the examination: 5 1. US Patent No. 3211372, cl. 236-15, 1975. 2. US patent number 3193199, cl. 431-12, 1973. 3. Klimovetsky MD, Optimizing the operation of heating furnaces, M., Energie, 1972, p. 137-138.