SU524962A1 - Device for controlling the firing temperature of alunite in a fluidized bed - Google Patents

Description

the fuel oil flow signal, the input of which is connected to the fuel oil pressure sensor, and the output to one of the inputs of the fuel oil flow control unit, to the second input of which, through the key switch integrator, connected to the clock generator, the key input unit, whose first input is connected to the temperature sensor, the fluidized bed temperature through the booster layer temperature increment signal generator connected to the input of a block of the unit’s clock connected to the generator of this increment connected to the second the logic input, the third input, which is connected to the temperature sensor over 1 layer of the first space through the shaper of the temperature increment signal of the superlayer, connected to the input of the clock generator of the increment sign of this increment, 1 connected to the fourth input of the logic block, through the comparison unit is connected to the density sensor of the fluidized bed.

The drawing shows a diagram of the described device.

A fuel oil pressure sensor I is connected to the fuel oil supply pipe to the nozzles. It is connected by an output channel to one of the input channels of the fuel oil flow rate generating unit 2, the second input of which receives a setpoint signal proportional to the number of operating nozzles. The actuator 3 receives the output signal of the control unit 4, the input of which receives the signal of block 2. Sensors 5 and 6, respectively, of the fluidized bed temperature and the over-bed space, are connected to the input channels of the increment drivers 1 and 7, the output channels of which are connected to the input channels channels of blocks 9 and 10 determine the signs of the temperature increment and logical block 11. In addition, with the input channels of the block

11 are connected by their output channels, blocks 9 and 10, and block 12, comparing the density of a layer with a given value. The output channel of the sensor 13 of the density of the fluidized bed is connected to one of the input channels of block 12. The output channel of the generator 14 is connected to the command-receiving channels of the temperature increment formers 7 and 8 and the integrator 15, which is connected to the output channel of the block 11 by its second input (a) with command block input 4.

When the pressure in the fuel manifold deviates (for example, from the pressure set by the task), the output | block signal 2 increases. Pr, and this signal increases the output signal (Output-block 4, which leads to a reduction in the flow area of the regulator until the pressure is in. the collector will not become equal to the specified value. When the density of the fluidized bed decreases below a given block

12 produces a mismatch signal, arriving at the input: at the input of the block, a log of: cic operations, which, regardless of the values of the signals at the other inputs, forms KO.viaiHdu by. the decrease in fuel oil consumption and at the next cycle sends it through integrator 15 to the software input of block 4. When the temperature of the bale of the first layer and the settling zone in elements 7 and 8 changes, the increments of the increments are formed, and in blocks 9 and 10, the signals

these increments. Unit 11 selects on the basis of these parameters the law of regulation, generates the magnitude and sign of the setpoint change and sends it to the integrator input. From the integrator output, the setpoint signal is fed to the software input of block 4.

The generator 14 generates clock pulses for controlling the blocks 9, 10 and 11. The pulse period is adjusted depending on the required accuracy in keeping the temperature. The presence in the device of a signal shaping unit, flow rate, fuel oil makes it possible to take into account the total consumption of fuel entering through the nozzles, where the number can be changed depending on the quantity and material residence time in the apparatus. The presence of temperature formers 7 and 8 and units for determining the signs of these increments makes it possible to take into account the values and signs of changing the temperature of the fluidized bed and the settling zone when formulating the control action. At the same time, the block of logical operations chooses the law of regulation of fuel supply, which allows preventing the introduction of fuel oil into the settling zone and its combustion in it. The density comparison unit (The fluidized bed allows a restriction on the supply of fuel oil while reducing the density of the fluidized bed, which leads to

reduction of dust from the apparatus.

The introduction of the device on two roasting apparatus will allow to obtain an annual E CONO | omic effect in the amount of 98000 r. (according to the Kirov data on the a-a-l-luminium charge,

calculated by the results of the trial operation of the device layout).

Claims (1)

Invention Formula Temperature control device firing of alunite in the fluidized bed, containing sensors for the temperature of the fluidized bed and the over-bed space, sensors for the density of the fluidized bed and the pressure of the oil, the control unit of the fuel oil flow rate, to the output (which has an actuator that is different in type; increase the accuracy of regulation, it installed the signal shapers of the temperature increments of the fluidized bed and the superlayer nipocTpaHiCTva, the units for determining the signs of these increments, the comparison unit, the clock generator, the logic unit, the I1ntelrator and the form unit or fuel oil flow rate signal input of which is connected to the fuel oil pressure sensor, and to The output one of the inputs of the flow control unit mazut, to the second input — of which the output of the logic unit, the first input (of which is connected to the temperature sensor of the boiling layer) via the generator of the increment signal of the temperature of the circuit (LAYER, connected to the input of the generator with clock emitters of the bloc and the distribution of signals, this is connected to the harness connected to the input of the logical input block, the third input of the iKOTOporo is connected to the temperature sensor of the underlayer space through the valve of the paddle space, connected to the input of the clock impulses of the unit for determining the sign of this increment connected to the Fourth input} of the logic block, which, through a block of connections, is connected to the sensor of fluidization of the fluidized bed.