SU1615476A1 - System of automatic control of power and process boiler plant - Google Patents

Abstract

The invention relates to the automation of heat and power processes, in particular, to the regulation of the efficiency of an energy technological boiler unit, for example, soda recovery. The aim of the invention is to increase the efficiency of an energy technological boiler when burning auxiliary liquid fuel in it. This is achieved by the fact that the automatic control system of an energy technological boiler unit, comprising a guiding device 1 of a blower fan, connected to a common air regulator 2, the inputs of which are connected to the black liquor flow sensor 6 and the common air flow sensor 4, with a corrective regulator 10 with a setting device 11 connected to the oxygen sensor 12, as well as a damper 19 on the secondary air path connected to the ratio controller 14, whose inputs are connected to the setting device 15, the flow sensor 4 common air and with the secondary air consumption sensor 17, additional fuel consumption and primary air flow sensors 8 and 23 were added to the auxiliary fuel nozzle with converters, unit 21, second ratio controller 20, damper 25 on the primary air path to the auxiliary fuel nozzle. This ensures an optimal distribution of primary air between the main and auxiliary fuel nozzles. 1 il.

Description

The invention relates to the automation of heat and power processes, in particular, to the regulation of the efficiency of an energy technological boiler unit, for example, co-regeneration.

The goal is to increase the efficiency of the energy technology boiler when burning auxiliary liquid fuel in it.

The drawing shows a functional diagram of the system for automatic regulation of an energy technological boiler unit.

The system of automatic regulation of the energy technology boiler includes a guide unit 1 of a blower fan connected to the common air controller 2, the inlets of which are connected to the setting device 3 and the sensor 4 for the total air flow through the converter 5, and the sensor 6 for the black liquor consumption through the converter 7, c sensor 8 flow rate auxiliary

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Moreover, an additional correction signal from the regulator 10 on the oxygen content from the sensor 12 and the converter 13 is fed to the input of the regulator 2 of the general air, thereby increasing the accuracy of maintaining the optimal excess. Corrective regulator 10 forms an additional regulating effect in case of intra-furnace disturbances and maintains excess air depending on the load of the boiler unit in a narrower range.

To stabilize the black liquor burning process, the signal from the common air flow sensor 4 through the converter 16 and the signal from the secondary air flow sensor 17 through the converter 18 is fed to the input of the ratio controller 14, which is used to generate the error signal and the control signal for transient fuel is generated through the converter 20 Conception 19 on the secondary path

9, with corrective adjustment 10, st -

connected to the setting device 11 and the oxygen sensor 12 through the converter 13, and the output of the regulator 2 is connected with the guide device 1. The system also includes a regulator 14 for the ratio of total air - secondary air with the setting device 15, to the input of which the converter 16 is connected, A sensor 17 for the flow of secondary air through the transducer 18 and the outlet of the regulator 14 is connected to the valve 19 on the secondary air path. In addition, the system includes a regulator 20 of the auxiliary fuel consumption ratio — the primary air consumption with a setting device 21, to the inlet of which

A transducer 22 is connected, connected with 35 moving the flap 25 on the path by the auxiliary fuel air flow sensor 8 to the auxiliary air nozzle. In addition, in order to better stabilize the firing process during co-combustion of the main fuel (black liquor) and auxiliary fuel (gas, fuel oil), the ratio of auxiliary fuel consumption to primary air flow to the auxiliary fuel nozzle is regulated. For this, the signal from the auxiliary fuel consumption sensor 8 through the converter 22, as well as the signal from the primary air consumption sensor 23 to the auxiliary fuel nozzle, through the converter 24 is fed to the input of the second ratio controller 20, which generates the error signal and generates a control signal

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The primary air flow sensor and sensor 23 is through the converter 24, and the regulator output-: pa 20 is connected to the valve 25 in the path; primary air to the auxiliary fuel injector is 1 tel, i. The system works as follows. The signal from the black liquor consumption sensor 6 through the converter 7 and the signal from the auxiliary fuel consumption sensor 8 through the converter generate a 45 signal for fuel consumption, which is fed to the input of the common air regulator 2, to which the signal from the common air consumption sensor 4 is also input converter 5. Mismatch signal according to the ratio of signals: fuel consumption — air consumption is processed by the common air regulator 2, which controls the position of the guide apparatus 1 of the blower fan. The signal from sensor 4 of the total air flow eliminates disturbance

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th fuel. This ensures an optimal distribution of the primary air between the black liquor nozzles and the auxiliary fuel, which improves the combustion process during co-combustion of fuels.

Claims (1)

Invention Formula An automatic control system for an energy technological boiler unit containing a common air regulator, the output of which is connected to a guide fan of the blower fan, and the inputs to the unit and the sensor for the flow of common air, the black liquor flow sensor and the corrective regulator connected to the unit and sensor oxygen in the flue gases, and a ratio controller, the outlet of which is connected with a flap on the secondary air path, and a setpoint sensor and common and secondary air flow meters are connected to the inputs, lichayuscha in that, in order to increase efficiency boiler when burning it an auxiliary liquid fuel, it is further soderpo air flow is not associated with regulig tion efficiency and contributes to the stabilization of the control process, since it serves simultaneously a signal negative feedback. Cro Moreover, an additional correction signal from the regulator 10 on the oxygen content from the sensor 12 and the converter 13 is fed to the input of the regulator 2 of the general air, thereby increasing the accuracy of maintaining the optimal excess. Corrective regulator 10 forms an additional regulating effect in case of intra-furnace disturbances and maintains excess air depending on the load of the boiler unit in a narrower range. In order to stabilize the black liquor burning process, the signal from the common air flow sensor 4 through the converter 16 and the signal from the secondary air flow sensor 17 through the converter 18 is fed to the input of the ratio controller 14, which is used to generate the error signal and a control signal is generated for the movement 19 on the secondary path Conception 19 on the secondary path  moving the damper 25 on the primary air path to the auxiliary air nozzle. In addition, in order to better stabilize the firing process during co-combustion of the main fuel (black liquor) and auxiliary fuel (gas, fuel oil), the ratio of auxiliary fuel consumption to primary air flow to the auxiliary fuel nozzle is regulated. For this, the signal from the auxiliary fuel consumption sensor 8 through the converter 22, as well as the signal from the primary air consumption sensor 23 to the auxiliary fuel nozzle, through the converter 24 is fed to the input of the second ratio controller 20, which generates the error signal and generates a control signal 35 movement of the valve 25 on the primary air path to the nozzle auxiliary0 five 0 five th fuel. This ensures an optimal distribution of the primary air between the black liquor nozzles and the auxiliary fuel, which improves the combustion process during co-combustion of fuels. Invention Formula An automatic control system for an energy technological boiler unit containing a common air regulator, the output of which is connected to a guide fan of the blower fan, and the inputs to the unit and the sensor for the flow of common air, the black liquor flow sensor and the corrective regulator connected to the unit and sensor oxygen in the flue gases, and a ratio controller, the outlet of which is connected with a flap on the secondary air path, and a setpoint sensor and common and secondary air flow meters are connected to the inputs, lichayuscha in that, in order to increase boiler efficiency by burning therein an auxiliary liquid fuel, it is further soder1615476 5 .6 there are sensors with converters for auxiliary fuel consumption and Primary air and secondary auxiliary air to the nozzle the fuel supplied to the nozzle, auxiliary auxiliary fuel, are connected to fuel, and the second controller corresponding to the inputs of the second ratio controller, and bearing with master and associated auxiliary fuel consumption sensor with a damper on the primary air path is also connected to the auxiliary inlet of the auxiliary fuel, the date of the common air regulator.