How to detect the lining thickness of a 고온 전기로?

1. 커패시턴스 방식

커패시턴스 방식은 저항 방식과 유사합니다. 동축 원형 커패시터 센서는 퍼니스 라이닝 내부에 내장되어 있으며 커패시턴스 값은 길이에 해당합니다. 용광로 벽돌의 두께는 정전용량 값을 측정하여 결정할 수 있습니다.

2. Stress wave method

The stress wave signal is very sensitive to structural defects. When the stress wave propagates in the medium, such as holes, cracks and other interface discontinuities, reflection, refraction, scattering and mode conversion will occur. The thickness of the stave material can be determined.

3. 저항법

The resistance element is embedded inside the furnace lining, the front of the sensor is aligned with the inner surface of the furnace lining, and it is connected to the measurement system through a lead wire. The resistance value of the resistance element is related to its length. As the resistance element and the furnace lining lose synchronously, the resistance will change. Use the corresponding measurement The meter measures the electrical signal output by the component, and then the remaining thickness of the furnace lining can be measured online.

4. 열류 감지 방식

열역학에 따르면 온도차, 열전도율 및 노 벽 두께가 열 흐름 강도를 결정합니다. 고로 라이닝의 경우 열전도율이 고정되어 있으며, 온도차와 열류강도로부터 노벽두께를 구할 수 있다.

The heat flow detection sensor is installed in the lower temperature part of the furnace lining. The heat flow intensity is calculated by the water temperature difference of the cooling wall of the hearth, and the temperature value measured by the thermocouple in the brick lining is combined to calculate the thickness of the furnace wall.

5. 초음파 방법

The thickness measurement is carried out at the point where the ultrasound propagates in the solid medium. At a constant temperature, the ultrasound is incident on the furnace lining and enters the furnace. The propagation time of the incident and reflection of the ultrasound in the furnace lining is used to obtain the residual thickness of the furnace lining.

6. 다두 열전대 방식

Several thermocouples of different lengths are installed in a protective sleeve, and then they are installed in the brick lining that needs to be inspected, and the erosion of the masonry can be inferred by measuring the temperature change of each thermocouple. When the temperature of each point and the temperature gradient between each point are basically stable, when the brick lining is gradually eroded to a certain part, the galvanic couple in that part will be destroyed, and the temperature signal will be abnormal.

7. 모델 추론 방법

열전대를 감지 요소로 사용하고 열역학 및 기타 이론을 적용하여 난로 및 노 바닥 온도 사이트의 수학적 모델을 설정하고 소프트웨어 프로그래밍 및 수치 분석을 통해 용철 응고선 및 탄소 벽돌 침식선의 대략적인 위치를 계산합니다.