一种炉膛火焰位置估计系统
By installing infrared detection components and signal processing circuits in thermal power units, the three-dimensional spatial position estimation and automatic control of the furnace flame are realized, solving the problem of inaccurate flame position estimation in existing technologies and improving combustion efficiency and system stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI HUADIAN SUZHOU POWER GENERATION
- Filing Date
- 2025-10-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing furnace flame position estimation systems for thermal power units rely on closed-circuit television image monitoring, which cannot accurately capture the distribution characteristics of flames in the furnace depth direction. This results in time delays and subjective errors, and the equipment is prone to damage, leading to monitoring blind spots and inaccurate combustion control.
Infrared detection components and multiple sensors are installed along the outer wall of the furnace. Combined with signal processing circuits and microprocessors, the three-dimensional spatial estimation of the flame position is performed. The furnace temperature field is obtained through data acquisition and infrared temperature measurement units. Dynamic estimation is achieved using the flame position estimation module. The fuel and air volume are adjusted in a closed loop through the output distribution module to achieve automatic control.
It significantly reduces fluctuations in steam temperature and pressure, improves combustion efficiency, reduces the workload of operators, and enables precise sensing and automatic control of the furnace flame position.
Smart Images
Figure CN224516835U_ABST
Abstract
Claims
1. A furnace flame location estimation system, characterized by, include: Measurement module, position estimation module, allocation module, and drive module; The measurement module is located on the outer wall of the furnace and is connected to the position estimation module; The position estimation module includes a signal processing circuit; the signal processing circuit includes an analog-to-digital converter, a phase-locked loop, and a level conversion chip; the phase-locked loop and the level conversion chip are both connected to the analog-to-digital converter, and the output terminal of the level conversion chip is connected to the input terminal of the allocation module; The distribution module is connected to the drive module, which in turn is connected to the existing coal mill and blower.
2. The furnace flame position estimation system according to claim 1, characterized in that, The measurement module includes an infrared detection component and multiple sensors; The infrared detection assembly consists of multiple infrared temperature probes and is installed along the outer wall of the furnace. The sensor input terminal is connected to the outlet of each coal mill, the primary air duct, and the coal feeder.
3. The furnace flame position estimation system according to claim 2, characterized in that, The measurement module further includes a sensor signal conditioning circuit, the input of which is connected to the sensor, and the output of which is connected to the input of the position estimation module. The sensor signal conditioning circuit consists of an operational amplifier, a filter capacitor, and a current-limiting resistor.
4. The furnace flame position estimation system according to claim 1, characterized in that, The location estimation module also includes a microprocessor circuit; The microprocessor circuit includes a central processing unit, a random access memory, and a read-only memory, with the central processing unit connected to the random access memory and the read-only memory respectively. The output terminal of the microprocessor circuit is connected to the input terminal of the distribution module.
5. The furnace flame position estimation system according to claim 4, characterized in that, The input terminal of the analog-to-digital converter is connected to the measurement module; The input terminal of the phase-locked loop is connected to the clock signal input pin of the analog-to-digital converter. The input terminal of the level conversion chip is connected to the output terminal of the analog-to-digital converter, and the output terminal of the level conversion chip is connected to the input terminal of the microprocessor circuit.
6. The furnace flame position estimation system according to claim 1, characterized in that, The allocation module includes a logic control circuit and a data allocation circuit; the output terminal of the logic control circuit is connected to the input terminal of the data allocation circuit.
7. The furnace flame position estimation system according to claim 6, characterized in that, The logic control circuit includes programmable logic devices and logic gates. The output of the programmable logic device is connected to the input of the logic gate, and the logic gates are cascaded through pins. The data distribution circuit includes a data selector and a shift register. The output of the data selector is connected to the input of the shift register, which is composed of multiple cascaded flip-flops. The output of the shift register is connected to the input of the driver module.
8. The furnace flame position estimation system according to claim 1, characterized in that, The drive module includes a high-voltage control circuit, a low-voltage control circuit, and a stepper motor winding. The high-voltage control circuit includes a high-voltage transistor, a current-limiting resistor, and a protection diode. The current-limiting resistor is connected in series with the control electrode of the high-voltage transistor, and the protection diode is connected in reverse parallel across the two ends of the high-voltage transistor. The low-voltage control circuit includes a low-voltage transistor, a logic circuit, a coupling capacitor, and a bias resistor; the output terminal of the logic circuit is connected to the control electrode of the low-voltage transistor through the coupling capacitor, and the bias resistor is connected between the control electrode of the low-voltage transistor and the power supply or ground. One end of each winding of the stepper motor is connected to the output terminal of the high-voltage transistor in the high-voltage control circuit, and the other end is connected to the output terminal of the low-voltage transistor in the low-voltage control circuit or the common terminal.
9. The furnace flame position estimation system according to claim 8, characterized in that, The drive module also includes a drive component; The driving component typically includes a driving chip and a freewheeling diode; The input terminal of the driver chip is connected to the low-voltage control circuit, the output terminal is connected to the transistors in the high-voltage control circuit and the low-voltage control circuit, and is connected to the power input terminals of the coal mill and the blower. The freewheeling diode is connected in parallel across the two ends of the stepper motor winding.
10. The furnace flame location estimation system of claim 1, wherein, It also includes power supply and safety protection modules; The power supply and safety protection module includes an independent power supply unit, a UPS backup power supply and a protection circuit. The independent power supply unit and the UPS backup power supply are connected to the measurement module, the position estimation module, the distribution module and the drive module. The protection circuit is connected to the independent power supply unit and the UPS backup power supply.