Analysis of Burning Death Accidents Caused by Oxygen Leakage in Steel Plant Converter

First, the accident passed

2006 at 23:20 on April 11, after a steel company in Liaoning Province iron end converter maintenance shutdown, plant equipment operating long lance conductor test, less than 2min time, after being ejected from approximately 1685m3 oxygen lance The suction flue is removed, and the drift is nearly 300m to reach the flue fan.

At 23:30, one of the fitter's clothes covering the flue fan was splashed with gas welding sparks, and the overall work clothes burned quickly. The workers working with the pliers immediately sprayed dry powder on the body with a fire extinguisher. After the fire was extinguished, it was taken out of the wind turbine and taken to the hospital. Due to extensive burns, the fitter died at 2:50 on the 12th.

Second, the cause analysis

1. The density of air and oxygen under standard conditions is 1.295g/L and 1.429g/L, respectively. Since the density of oxygen is slightly larger than the density of air, the oxygen cluster is not easily mixed with the atmosphere under the breeze meteorological conditions. After drifting 300 m along the ground, the fitter is surrounded by oxygen.

2. The work clothes of the working fitter in the oxygen group belong to the flammable gas. When the high-temperature gas welding spark is ignited, it is violently burned, and the fitter is severely burned to death.

Third, the accident lessons

1. Do not release large amounts of oxygen into the atmosphere at any location where there are multiple types of work.

2. In the place where there are many types of work, if there is a large amount of oxygen leakage accident, it is necessary to immediately notify the downstream workers to stop the operation within 1000m. It is best to evacuate the site and wait for the plant safety management personnel to check the oxygen using the oxygen detector. The operation can be resumed when the content reaches the normal value.

3. It must be operated under oxygen-rich conditions, and operators should not perform open fire operations such as electric welding, gas welding, and gas cutting. Not use sparking tools (ordinary steel wrenches, hammers, etc.), you should use copper alloy material is not sparking tools to prevent sparks caused by an explosion due to the tool.

4. Oxygen leaks into the atmosphere in large quantities. If there is a strong wind, the airflow is agitated sharply, the distance of the oxygen mass drifting along the ground is short, the risk of fire is small, and the possibility of burns by nearby people is small; if it encounters a breeze, The airflow diffusion speed is slow, and the distance of the oxygen mass drifting along the ground is long, which causes a high risk of fire, and the possibility of burns by nearby people is also large. Therefore, special attention should be paid to the safety of operations under oxygen leakage conditions in breezy weather conditions.

LED PCB

The most comprehensive introduction of LED PCB

The relationship between LED and PCB

The printed circuit board is a genius innovation of circuit technology, laying less space and materials for more complex and large-scale circuits. The printed circuit board is such an important invention in circuit technology because it makes electrical and electronic components smaller, more flexible and more precise. For example, FPC(Flexible PCB), Multilayer PCB, BGA PCB , rigid-flex PCB and so on.

LED is an abbreviation for light-emitting diode. An LED is essentially a two-lead semiconductor device that emits light when current passes in a certain direction. Although LEDs start with devices that only emit low-intensity infrared light, this technology has been widely used in lighting for many years. Modern LEDs not only provide high intensity, very bright light but also different uses and use in different scenes, such as plant growth lights, car lights, street lights, traffic lights, shadowless lights in hospital operating rooms.

Soldering the LED chip to the PCB board, as long as the PCB circuit is connected in some way, it will illuminate, which forms the LED PCB. LED PCBs typically also have a heat sink and ceramic pedestal to hold the circuit in place and allow the smooth operation of the circuit. A heat sink is required because LEDs tend to generate a lot of heat, which can damage the PCB and the equipment that connects the circuits.

Because LED will produce a lot of heat, led PCB generally uses metal substrate as its production material. Metals with the ability to dissipate heat quickly have proved to be a better choice. Generally, whenever led PCB is designed, Aluminum PCB is preferred. Aluminum PCB usually also contains a thin layer of dielectric, which can dissipate heat faster.

In addition to general lighting, led PCB can also provide visible light, infrared and ultraviolet light. Compared with other light sources, LED PCB can provide higher energy.

We are a professional LED PCB manufacturer and assembler in China, In this article, we would like to introduce in detail what is LED PCB, the materials used in manufacturing and LED circuit boards manufacturing, the application of LED printed circuit boards and so on.

LED PCB board Introduction

LED PCB has many other names, such as LED PCB board, LED circuit, LED circuit board, led printed circuit boards, PCB board for LED.

In a sense, LED PCB and aluminum PCB belong to the same kind of PCB products, because their uses and materials are mostly the same.

With the popularization and widespread use of industrial lighting and civil lighting, whether outdoor or indoor, family or commercial buildings and factories, lighting provides the guarantee of its normal operation.

Of course, nowadays, with the development of human society, environmental pollution has become a difficult problem in the world. In order to reduce the consumption of coal, such as coal used for power generation in thermal power plants, coal combustion pollutes the atmosphere very seriously. In order to save energy and protect the environment, LED lights and previous lighting methods have great advantages, except for energy. Besides providing brighter lights, it also contributes to environmental protection.

LED PCB Meaning

LED circuit board is a kind of printed circuit board.

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LED PCB Board Manufactureing

Both LED aluminium PCB and FR-4 fiberglass circuit board belong to PCB. To say differently, only compare LED aluminium substrate with FR-4 fiberglass circuit board.

LED aluminium substrate is printed on the surface of aluminium material with better thermal conductivity, and then weld electronic components on it.

In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.

The voltage drop across an LED is approximately constant over a wide range of operating current; therefore, a small increase in applied voltage greatly increases the current.

Very simple circuits are used for low-power indicator LEDs. More complex, current source circuits are required when driving high-power LEDs for illumination to achieve correct current regulation.

An LED PCB board tends to generate a high volume of heat, making it difficult to cool via traditional means.

LED PCB Board Material - LED PCB raw material, LED bulb PCB raw material, LED strip PCB material

Metal core PCBs are often chosen for LED applications because they have enhanced heat dissipation capabilities. In particular, aluminium is usually used to make circuit boards for LED lamps. Aluminum substrates usually consist of thin layers of thermal conductive dielectrics that can be transported and have much more efficient heat dissipation than conventional rigid PCBs.

Compared with other electronic components, LED generates more heat, which requires PCB to heat very well. For this special feature, Metal Core PCB is often used in LED circuit boards, especially aluminum core PCB.

The following is the heat dissipation capacity of PCB plates of different materials, from weak to strong

1. FR4, common PCB board material;

2. Alumina substrate;

3. There is no doubt that the thermal conductivity of ceramic PCB is the best among many materials;

4. The thermal conductivity of alumina ceramic circuit board can be about ten times that of the aluminum substrate;

5. The thermal conductivity of Slyton aluminum nitride ceramic circuit board is ten times higher than that of alumina;

In this kind of ultra-high thermal conductivity, LED light attenuation will be greatly weakened, and its service life will be greatly increased.

LED Lighting PCB Assembly

Seeking LED PCB and Assembly? LED PCB manufacturing and assembly; Led board made based on your PCB files. Turn-key services; 100% inspection.

Applications of LED PCB

PCB LED lights can be incorporated into numerous lighting applications due to their combination of excellent energy efficiency, low cost and maximum design flexibility.

• Automotive headlights
• Airport runway landing lights
• Lighting used in military field
• Street lighting
• Highway tunnel lighting
• Photovoltaic (solar) lighting
• Flashlights and lanterns
• Traffic and signal lighting
• Lighting in hospital operating rooms
• High growth plant lighting
• Highway tunnel lighting
• Solar power products

If you have any questions about LED PCB Board, Please feel free to send us email. If you have final Gerber for production, welcome your inquiry.

Additional Information

Aluminum PCB for LED Light/Lamp/Tube
Aluminum PCB for LED
Aluminium Base LED PCB
LED Metal Core PCB
Metal Core PCB for LED
PCB industry cut into LED PCB heat sink aluminum substrate
Double Sided Aluminum PCB

LED PCB,LED Circuit Board,LED PCB Board,LED Printed Circuit Board

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