SU909451A1 - Apparatus for automatic control of fuel feeding into the burner of multiburner steam generator - Google Patents

Description

(54) DEVICE FOR AUTOMATIC REGULATION OF FEEDING TONJlIffiA IN THE BURNER OF MULTI BURNER

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This invention relates to automating the combustion process in high power boilers burning. Oil, gas or gas with minimal excess air ... i

A device for automatic control of fuel supply to a burner of a multi-burner steam generator is known, comprising a valve for supplying fuel to a burner with a regulator connected to the fuel consumption sensor in the burner and a unit for calculating a given value of this flow rate, the last of which is connected to the total fuel consumption per vapor parameter. generator, air flow sensor for each burner connected to the adder. In the device, the unit for calculating the fuel consumption setpoint value is made as a unit of comparison with the common fuel flow setting device and amplifier connected to it, connected to the adder 1 3. STOP GENERATOR ..

The disadvantage of the device is the deterioration of its operation with a deep load change. ,

The purpose of the invention is to achieve accuracy with changing loads.

The goal is achieved by the fact that the unit calculating the given value of fuel consumption in each burner is made in the form of serially connected dividing unit and

10 multiply, with the setting and output of the adder being connected to the division block, and the air flow sensor through the burner to the second input of the multiplying unit.

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The drawing shows a diagram of the device.

Claims (1)

Each steam generator burner contains individual control of fuel consumption 1 per burner e by regulator 2, fuel consumption sensor 3, air consumption sensor 4, and multiplication unit 5. The device contains air flow regulator 6 for all burners of a steam generator with regulator 7 (for example, fan guide) and combustion quality correction unit 8, unit 9 for summing signals from air flow sensor 4 with a group of 10 signals of similar sensors in systems automatic control of other burners, unit P summation of signals from sensor 3 fuel consumption with a group of 12 signals of similar sensors in systems of automatic control of other burners, block 13, which is the source of signals setting a fuel consumption per steam generator, block 14 dividing the signal of a given fuel consumption from block J3 to the signal of total air flow from block 9, issuing the task to multiplier 5 and group 15 similar blocks in automatic control systems of other burners, switch 16 of control mode of block 13, a manual control unit 17 by a unit 13 j a switch 16 for controlling either the manual control unit 17 or the signal 18 of the automatic generator load control system 18. The device works as follows. In the initial position, the signal of the block 13 is equal to the specified value of the fuel consumption for the steam generator. The signal at the output of dividing unit 14 is proportional to the specific fuel consumption (per received air consumption unit). The signal at the output of multiplication unit 5 is proportional to the specified fuel consumption in the given burner. The air flow regulator 6 maintains the fuel-air ratio set with a correction from unit 8 for combustion quality. When the setpoint value of fuel consumption changes under the influence of the signal 18 from the load control system or the manual control unit 17, which is determined by the position of the switch 16, the signals at the output of the blocks 14 and 5 change proportionally. Regulator 1 maintains a new fuel consumption setpoint for the burner. A change in fuel consumption drives controller 6, which sets a new value for total air flow. Since the change in air flow to each burner and the total flow are proportional to each other, the operation of controller 6 does not affect the operation of controller 1. As a result: this increases the control accuracy. Apparatus of the Invention A device for automatically controlling the supply of fuel to a burner of a multi-burner steam generator, comprising a fuel supply valve to a burner with a regulator, associated with a fuel consumption sensor to the burner and a unit for calculating a given value of this flow rate, the last of which is connected to a unit for total fuel consumption per steam generator , - air flow sensor for each burner connected to an adder, characterized in that, in order to increase accuracy when the load changes, the calculation unit is set values of fuel flow to each burner is in the form soedinenn1h successively dividing and multiplying unit, which are connected to the block division setting unit, and the adder output and to the second input of the multiplying unit - air flow sensor through the burner. Sources of information taken into account in the examination 1. Patent of England No. 1515302, cl. F 4 T, pub. 06/21/78.