SU1291199A1 - Apparatus for automatic regulation of melt spraying of soda-regenerative boiler unit - Google Patents

Abstract

This invention relates to the pulp and paper industry. The purpose of the invention is to improve the quality of melt spray control. The device contains a furnace of sodoregenerative type, a melt solvent tank, a unit controlling the current values of the inlet and outlet temperature of the cooling tap of water, a multiplier, a unit for measuring the steam flow to the spray, a regulator. The receipt of signals to the controller input from the units for measuring the flow rate of the melt and the steam flow rate ensures the absence of a static error of the device. By introducing a black liquor flow measurement unit, the current parameter is applied, which acts on the regulator controlling the movement of the adjustable valve. A correction signal is generated for the main disturbing influence (black liquor consumption), and the regulator, without waiting for the occurrence of the signal error “Float consumption - steam consumption,” comes into operation. 1 il. Q (LU SO CO

Description

The invention relates to the pulp and paper industry, in particular to regulating the spray of the melt coming from the furnace of the recovery furnace to the melt solvent tank.

The purpose of the invention is to improve the quality of the process of regulating the melt.

The drawing shows a block diagram of a device for automatically regulating the spray of a melt of a regeneration boiler unit.

The proposed device contains a furnace 1 sodoregeneratsionnogo boiler, on the openings 2 of which the melt enters the tank-solvent 3 of the melt. The sensors 4 and 5 of the temperature through the transducers 6 and 7 control the current values of the inlet and outlet temperature of the cooling tap of the water, and the sensor 8 of the flow rate and the transducer 9 control the flow of the cooling tap of the water. The signals from the transducers 6 and 7 are fed to the adder 10, from which the signal is fed to the multiplication unit 11, the input of which also receives a signal from the transducer 9 (cooling water flow). The set of elements 4-11 represents a flow measurement unit of the melt. The signals from multiplication unit 11, gauge 12 and from steam flow sensor 13 through converter 14 are fed to the input of controller 15. The serially connected elements 13 and 14 represent the steam flow meter for spray pattern. The flow sensor 16 and the converter 17 monitor the current values of the consumption of black liquor entering the furnace 1 of the recovery boiler. The series-connected elements 16 and 17 represent the black liquor flow measurement unit. The signal from the converter 17 is supplied to the differentiator 18, from which it is fed to the input of the regulator 15. The latter, through the control unit 19, influences the movement of the regulating valve 20 for supplying steam to the spray pattern.

When the flow rate of the melt is controlled, the flow measurement unit determines the flow rate determined by the product of the temperature difference and the flow rate of the cooling tap 2 of water, i.e., by producing signals from the adder 10 and the converter 9, a change occurs in the ratio of the flow rate to the steam flow and the controller 15 fulfills the error signal by issuing a control signal to the control valve 2f through the control block 19. In this case, the signal at the output of the steam flow measurement unit changes and the error signal at the input of the controller 15 disappears.

The receipt of signals at the input of the regulator 15: from the units for measuring the flow rate of the melt and steam flow rate ensures the absence of a standard error of the device. When applying the main disturbing effect on TofiKy 1 of the regeneration boiler regatf controlled by the black liquor flow measurement unit, the current parameter is applied to the input of the differentiator 18, which acts on the regulator 15 controlling the movement of the regulating valve 20. A correction signal is generated | the main disturbance to it (the consumption of black liquor) ,; and controller 15, without waiting for the occurrence of: misalignment of signals “Flow rate, steam flow rate, comes into operation. When a combined system for regulating the spray of melt with frequency TH4Hofj invariance for the consumption of black liquor is realized, this allows to improve the dynamic accuracy of the device.

Improving the quality of the spray control: the melt of a regeneration boiler-aggregate;

Claims (1)

Invention Formula A device for automatic control of the spray of the recovery boiler, containing a control unit for the current inlet and outlet temperature of the water cooling tap, connected to the first input of the multiplier, water flow section of the cooling tap, connected to the second input of the multiplier, connected to the first input of the regulator the torus connected to the regulating authority for the supply of steam, the flow measurement unit pa |) and the spray connected to the second Inlet of the regulator, the third input of which is connected to the setting device, characterized in that, in order to improve the quality of the process of Adjusting the melt, a black liquor flow meter and differential gear is inserted into it between the output of the black liquor meter flow measuring block and the fourth input of the regulator. Ohlai Daiush, and The black - i4elok