What is the difference between an oxygen flashback arrestor and an acetylene flashback arrestor

Oxygen does not have a flashback arrestor because oxygen supports combustion and is not inherently combustible. Oxygen has a safety valve. It is a device that protects the pressure reducing valve and makes it safe to use, and it is also a signal device for the failure of the pressure reducing valve.

If, due to damage to the valve pad, valve or other reasons, the outlet pressure rises on its own and exceeds a certain permissible value, the safety valve automatically opens and vents.

Acetylene has a flashback preventer, which is installed at the pipe line behind the acetylene pressure gauge, which plays a role in preventing the backfire that occurs in the process of gas welding and gas cutting. Avoid flames entering the cylinder, occurring**.

Basic Requirements: It can reliably prevent the propagation of flashbacks and waves, and can quickly expel the gas into the atmosphere.

There should be a pressure relief device.

It can meet the requirements of the welding process, such as not affecting the flame temperature, gas flow, etc.

Easy to control, inspect, clean and service.

In the event of a tempering, it is best to automatically cut off the air supply.

Structure of flashback arrestor.

At present, most of the domestic water-sealed flashback arresters are used. The use of water-sealed flashback arrestor should pay attention to the following safety requirements:

The amount of water in the device shall not be less than the requirements of the calibration of the water level gauge. The water level should not be too high, so as not to carry too much water with acetylene and affect the flame temperature. The water level should be checked and replenished at any time after each flashback. In addition, the flashback arrestor should be hung vertically when in use.

When used in winter, all the water should be drained after the work is completed to avoid freezing. If freezing occurs, it can only be thawed with hot water or steam, and it is strictly forbidden to bake with open flame or red iron.

Each post flashback arrestor can only be used for one welding torch or cutting torch alone. Acetylene is prone to the formation of impurities with viscous oil, so the seal of the check valve should be checked frequently.

The mixture of acetylene and oxygen in the device should be drained before use.

Oxygen cylinders do not have flashback arrestors, only pressure relief safety valves on the bottle valves of the cylinder body.

The acetylene bottle also does not have a flashback arrestor, only a fusible plug safety valve device on the neck of the bottle.

They differ in shape and use different materials.

The principle of acetylene anti-tempering device: in the process of gas welding or gas cutting trace elevation, sometimes the phenomenon of reverse combustion of gas flame into the nozzle will occur, which is called tempering.

During tempering, once the flame of reverse combustion enters the acetylene generator or acetylene bottle, a combustion accident will occur. The function of the flashback arrestor is to prevent the flame from flowing backwards into the acetylene generator or acetylene bottle, or prevent the flame from burning in the acetylene pipeline, so as to ensure the safety of the acetylene generator or acetylene bottle.

Oxygen cylinders must have a tempering valve when they are used. It is also needed to be on the safe side. Many people will have this misconception that oxygen is only a combustible gas, and the pressure is high, so there is no need for a tempering device. Actually, this is wrong.

There are mandatory national standards that clearly indicate the need for use. "Welding and Cutting Safety" GB9448, Article 1: "When two gases are used for welding or cutting at the same time, the outlet end of the pressure reducer of different cylinders should be equipped with their own check valves to prevent the gas flow from backing up each other.

In the "Town Gas Design Code" GB50028, there is also a similar statement.

Answer: Oxygen and hydrogen generators generally use oxygen temperers.

Explanation: A hydrogen oxygen generator is a device that splits water into hydrogen and oxygen, where oxygen is essential. The oxygen temperer is a kind of equipment that reuses the oxygen in the exhaust gas, which can improve the oxygen utilization rate and reduce emissions.

Therefore, the use of oxygen tempering in the hydrogen and oxygen generator can save oxygen resources and protect the environment.

Expansion: In addition to the oxygen temperer, there is also an acre of bucket tempering device that is acetylene temperer. The acetylene temperer is ignited by mixing the ethylene in the exhaust gas with air to produce high-temperature and high-pressure gas, so that the gas that is not completely burned will continue to burn, improve the combustion efficiency and reduce the exhaust gas emissions.

However, acetylene tempering devices are safety hazards, so acetylene temperers are generally not used in hydroxide generators.

1 Oxygen tempering device for hydroxide generator.

2 Hydrogen is a flammable and explosive hidden gas, and there will be potential safety hazards if it is directly tempered with acetylene.

Oxygen is a strong oxidizing agent, which can promote the reaction rate of hydrogen and oxygen combustion in the limbs, making the hydrogen and oxygen generator work faster and safer.

3 In some cases, in order to ensure the stability of combustion, it is necessary to add a small amount of methane or ethane as a diluent to the oxygen temperer to control the speed and temperature of the reaction.

The hydrogen-oxygen generator can use oxygen as an oxidizer for combustion reaction, and an oxygen rocket engine should be used as a rocket propellant; Acetylene can also be used as a reducing agent for anti-congratulation, at this time acetylene rocket engine should be used as the rocket propellant Li Zai, so it is necessary to choose the corresponding rocket engine according to the different oxidants or reducing agents used.

If you use an oxygen tempering device or an acetylene tempering device, acetylene is easy to be flammable when exposed to oxygen, and an oxygen tempering device is safer.

The principle of acetylene anti-tempering device: in the process of gas welding or gas cutting, sometimes the phenomenon of reverse combustion of gas or body flame into the nozzle will occur, which is called tempering.