Figure 1: Gastech mircopack visible flame detector.
Flame detectors respond to exposure to radiation from the radiant energy emitted by a fire. Because radiant energy travels at the speed of light, flame detectors have the ability to act quickly. Flame detectors are divided into ultraviolet detectors, infrared detectors, flame flicker and flame photoelectric detectors.
The probe of the flame detector has strong anti-interference ability to lightning, sunlight reflection, arc welding, heating objects, etc. However, in actual use, in order to reduce the impact of false alarms on production stability, we still need to investigate possible interference factors and prevent them as much as possible. It is recommended to pay attention to the following points during daily use and maintenance:
Figure 2: Goodman flame detector probe.
1. When there is welding at the job site, carefully select and isolate the area covered by the flame probe.
2. Check the heating sources such as lighting fixtures within 0.9 meters of the flame probe to prevent the influence of equipment heating.
3. Pay attention to the fixed heat source area in the main engine room and the turbine unit skid. Be aware that operator movement may cause false alarms from the flame probe.
Figure 3: Engine rooms need good flame detectors.
Background infrared interference refers to interference from fixed heat sources such as turbine casings, finned fan coolers, etc. The infrared interference of the probe to the fixed heat source is suppressed by filtering and algorithm. When a person or object moves back and forth between the fixed heat source and the probe, the modulated infrared wave generated may cause the probe to falsely alarm.
4. Pay attention to the influence of the walkie-talkie on the flame probe. It is recommended not to use the walkie-talkie (send key) within 0.3 meters of the flame probe.
5. Check the state of the shielding layer of the flame probe cable to prevent skin breakage, damage, etc., and prevent external electromagnetic interference.
6. During daily maintenance, pay attention to the cleaning of the inspection and self-inspection probe lenses. After the lens is contaminated, the intelligent probe will correct or compensate the probe's fire monitoring algorithm according to the pollution situation. This may lead to a decrease in the noise immunity of the probe, resulting in false alarms.
Figure 4: Rosemount flame detector.
7. During preventive maintenance, pay attention to the inspection of internal wiring, rainproof, shielded wire and ground wire. Reasonable installation of shielded wire and ground wire can prevent the influence of external interference factors such as thunder.
11/28/2022
Flame detectors respond to exposure to radiation from the radiant energy emitted by a fire. Because radiant energy travels at the speed of light
11/28/2022
After purchasing a flame detector, we may need to install it by ourselves. To install it correctly, here are some points you need to pay attention to.
11/25/2022
On the basis of traditional flame detectors, image-type flame detectors combine intelligent camera control technology and intelligent image processing technology.
11/24/2022
Burning generates smoke and releases heat, thanks to which, smoke detectors are invented to protect the people and properties.
11/23/2022
The air conditioner is composed of heat and cold sources, wind system, water system, air conditioning treatment equipment, and devices for controlling and regulating air conditioning.
11/22/2022
The centrifugal fan is a device that relies on the input mechanical energy to increase the pressure of the air and discharge the air.
11/21/2022
The centrifugal fan is a device that uses the input mechanical energy to increase the pressure of the gas and discharge the gas.
11/19/2022
Axial fans and centrifugal fans are two different products in the fan category. Their main function is to ventilate the air in the environment.
11/17/2022
As for an axial fan, the air flows parallel to the axis of the fan. It has a wide range of uses, such as electric fans, outdoor fans of air conditioners.
11/16/2022
Axial fans, also called axial flow fans, are very versatile and produce airflow in the same direction as the axis of the fan blades.
IWAYA DENKI Water Pump 25CJT0752
Panasonic Servo Motor MHMF022L1V2M
Honeywell Solenoid Valve VE4025B1045
ROTEN Mechanical Seal 8E5K-22-X
Hidrostal Mechanical Seal 8DM-X2.0T/D
Banner Sensor SM312LVMHSQDM5V
DHF Tool for Metal Cutting IBC0402