Obviously natural gas is odorless, why can the leak smell bad?

1 Natural gas itself is colorless and odorless, but in order for people to identify, adding odorants to domestic natural gas will produce rotten eggs.

taste. As soon as there is a foul smell, immediately be vigilant, apply soapy water to the suspected air leakage, and deal with it immediately and effectively.

2. Natural gas leakage handling measures to keep calm and take the following measures: 1. Cut off**. Please turn off the burner switch, rotary valve, ball valve immediately, and do not move the appliance. 2.Turn all electrical appliances on and off, including electric and electric fans.

Exhaust fans, inhalers, air conditioners, doors, wires and wireless**, doorbells, refrigerators, etc., will produce small sparks that cause **. 3. Evacuees. Quickly disperse family and neighbors to prevent unrelated people from approaching.

4. Open doors and windows. Circulate air so that the gas can be dissipated. 5. Power alarm.

3. Popularize the basic knowledge of natural gas, after gas leakage, it will be filled with air, suffocation or poisoning, so try not to leave people indoors. If you find a fire, cover it with a damp cloth or use a fire extinguisher.

In addition, when installing or repairing gas pipelines, on-site services from experts from the formal sector should be requested. Do not secretly install, extend, or disassemble plumbing valves and pipes. It is necessary to develop the habit of using the gas stove according to the operating procedures of the manual, and turning off the main valve when not in use.

When going out for a long time, it is necessary to thoroughly check whether the switch and main valve of the gas stove are closed. Do not put flammable and explosive substances around the gas stove, and do not put heavy objects on the gas pipe. The stove, pipes and connected hoses can be checked frequently for air leaks.

When soapy water is applied to the cooktop, or a connection to a pipe, hose, or cooktop, the gas is leaking when the foam protrudes. Be careful not to hang wet objects such as rags and wipes on the gas pipes. If these wet things are left to dry for a long time, the pipes are prone to rust and may break.

Wet rags with salt or acidic substances can corrode iron pipes and shorten their life. Friends who use natural gas at home can smell bad eggs or rotten cabbage in their kitchens, and when they smell this smell, they will realize that there is a gas leak. But the main component of pure natural gas is methane.

Methane has no taste. So why do users smell a foul odor? Originally, the natural gas was processed before moving in, and in order to make it easy to find the natural gas leakage, the company added mercaptan with an unpleasant smell to the natural gas.

It smells strange. For the human olfactory experience, scientists.

said that this ability allows humans to survive in a dangerous environment. These are volatile.

Sulfide not only helps us judge the quality of food, but also the amount of oxygen in the atmosphere.

In Gas**, in order to ensure that users can use natural gas more safely, the gas company adds some odorous gases to the natural gas, so that users can be aware of the problem that the natural gas has leaked.

Natural gas is colorless and odorless, but in civilian natural gas, in order to use it safely, an odorant with the smell of rotten eggs is added, and the effect is to prevent natural gas poisoning.

Natural gas is treated before entering the house, and in order to make natural gas leakage easy for people to find, ** personnel will add mercaptan with an unpleasant smell to the natural gas, so that they will notice something strange when they smell it.

The gas leak is rotten egg smell.

Originally, natural gas had no color or taste, but in order to prevent gas poisoning and make it possible for people to detect it as soon as possible, hydrogen sulfide gas was added to it, and the smell of this gas is rotten eggs, which is poisonous, but the content is small.

However, usually, if you smell a rotten egg smell, it means that the leakage is not low at this time. And although natural gas itself is non-toxic, if the concentration is too high, the density factor will squeeze the air, making the human body feel poor breathing and even suffocation.

Determine whether domestic gas is leaking:

Before the natural gas is delivered to the final occupants, mercaptans are used to add odors to the natural gas in order to facilitate leak inspection. Therefore, the first step can be judged by smelling it. However, because there are many foods in the kitchen, the taste is relatively complex, and it is not possible to judge correctly by smelling the smell.

When natural gas is not in use, the needle of the gas meter is still moving. If an alarm is installed in the home, the alarm will sound an alarm as long as there is a leak of natural gas.

Once the phenomenon of natural gas leakage is detected, the first thing to do is to open the doors and windows, turn off the valves and all electrical appliances, do not use open flames, and then quickly evacuate the room, go outdoors to call the relevant people, and eliminate the problem in time.

Natural gas is colorless and basically tasteless, but in order to facilitate the people to judge whether it is leaking, some substances are generally added to civil natural gas, and hydrogen sulfide gas is mixed in natural gas in order to make people aware of the leakage of gas. The hydrogen sulfide gas is similar to the smell of rotten eggs, because rotten eggs, rotten things, and sewers all contain hydrogen sulfide gas, and they all have the smell of rotten eggs.

It emits a pungent smell similar to paint, and people will feel nauseous and dizzy when they smell it too much. After purification, the natural gas has an odor and a small amount of deodorant. It can be clearly discerned.

Natural gas refers to all gases that exist naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcanic gas, coalbed methane, and biogenerated gas, etc.).

The long-term common definition of "natural gas" is a narrow definition from the perspective of energy, which refers to a mixture of hydrocarbon and non-hydrocarbon gases naturally contained in the formation. In petroleum geology, it usually refers to oilfield gas and gas field gas. Its composition is dominated by hydrocarbons and contains non-hydrocarbon gases.

Natural gas itself is colorless and odorless, but in order to be noticed, sulfide is generally added, and leakage will cause a peculiar smell.

Now tetrahydrothiophene and the like are commonly used, hydrogen sulfide is highly toxic and corrosive, and it is rarely used now.

The natural gas itself is colorless and odorless, and what people smell is the special odor produced by the odorant tetrahydrothiophene added by the natural gas company. Natural gas is mixed with hydrogen sulfide gas to make it possible to detect gas leaks. And hydrogen sulfide gas approximates the taste of rotten eggs.

Natural gas is a multi-component gas mixture, the main component is alkanes, of which methane accounts for the vast majority, and a small amount of ethane, propane and butane, in addition to generally containing hydrogen sulfide, carbon dioxide, nitrogen and water vapor, as well as trace amounts of inert gases, such as helium and argon. After purification, the natural gas has a peculiar smell and a small amount of deodorant.

Measures for the safe use of gas

1. Take close care when using gas. In the process of using the stove, people should not stay away to prevent gas leakage caused by the boiling soup overflowing or the wind blowing out the stove.

2. Close the valve and cut off the gas after using the gas. After using gas, the stove switch and the valve in front of the stove should be closed to prevent gas leakage. Especially if there are elderly people in the family, the elderly must be reminded to pay attention. If the public goes out for a long time (travel, business trip, etc.), the valve in front of the meter needs to be closed.

3. Frequent inspection. Always check the hose connection to see if it is fixed with clips and whether the hose is aged or cracked. The most prone parts of the gas pipeline to leak gas are the gas meter shell, various connection points on the gas pipeline, gas nozzle, hose and other parts.

4. Pay attention to ventilation. If you use gas for a long time, be sure to pay attention to ventilation. If the kitchen is not well ventilated, the oxygen in the kitchen will be insufficient after using the gas stove, which can easily cause carbon monoxide poisoning.

Natural gas leaks smell big. As long as there is no possibility of the pipe being squeezed or cut in a dark place, there should be no problem.

Natural gas can suffocate people when it reaches a certain level in the air. Natural gas is not like carbon monoxide.

It's toxic, it's inherently harmless. However, if natural gas is in a state of high concentration and the oxygen in the air is not enough to sustain life, it can still cause death, after all, natural gas cannot be used for human breathing. As a fuel, natural gas can also be caused by the occurrence of **.

Although natural gas is lighter than air and easily dispersed, when natural gas accumulates in an enclosed environment such as a house or tent, it reaches a certain proportion, triggering a powerful **. ** It is possible to raze an entire house or even affect neighboring buildings. Methane.

** limit in the air.

The lower limit is 5% and the upper limit is 15%.

Compressed natural gas to be utilized in natural gas vehicle engines.

Due to the volatile nature of gases, they are basically not available under spontaneous conditions, so it is necessary to use external forces to maintain the concentration of natural gas between 5% and 15% to trigger**.

Natural gas refers to all gases that occur naturally in nature, including the atmosphere.

hydrosphere, and lithosphere.

Gases formed by various natural processes (including oilfield gas, gas field gas, mud volcanic gas, coalbed methane and biogenerated gas, etc.).

The long-term common definition of "natural gas" is a narrow definition from the perspective of energy, which refers to hydrocarbons naturally stored in the formation.

Mixtures of non-hydrocarbon gases. In petroleum geology, it usually refers to oilfield gas and gas field gas. Its composition is dominated by hydrocarbons and contains non-hydrocarbon gases.

On May 6, 2020, PetroChina Southwest Oil and Gas Field Company disclosed that the company had discovered a new zone rich in natural gas, with an estimated potential resource of more than one trillion cubic meters.

The reason why natural gas smells is because the gas company adds the odorant tetrahydrothiophenol to make it easier for users to detect when supplying gas, and as long as there is a small amount of natural gas leakage, people will smell a special odor. Scientists say that this ability allows humans to survive in dangerous environments, and that these volatile sulfides can help us not only distinguish between good and bad food, but also how much oxygen is in the atmosphere.

The main component of natural gas is methane.

Methane is colorless and odorless, and can occur when the concentration of methane in the air is in between, when exposed to an open flame**. However, when the concentration is lower than that, combustion will not occur due to insufficient combustibles, and when the concentration is higher than 16%, due to the lack of oxygen, methane will not be able to burn quietly but this is the so-called limit.

Among them, the concentration of methane at the left and right levels is the most violent.

Methane is basically non-toxic to humans, even if it is not exposed to open flames, but when the methane in the air reaches 25%-30%, it will cause headaches due to insufficient oxygen content.

Dizziness, fatigue and other symptoms, in severe cases, can lead to suffocation and death.

Odorants also generally refer to odorants for gas. The choice of different odorants is determined by different gas systems, flavoring equipment, and the habits of residents in different regions. Interestingly, in the United States, people are more sensitive to mercaptans, while in Europe, tetrahydrothiophene.

The taste is easier to identify. Compared to ethyl mercaptan.

Tetrahydrothiophene because of its chemical properties.

It has the advantages of stability, strong oxidation resistance, and low addition amount, and has been widely used as a odor in the mid-90s of the 20th century.

It is generally believed that after adding odorant, non-toxic gas leaks into the air and reaches the lowest limit.

should be detectable at 20%; Toxic gases leak into the air and can be detected before they reach harmful concentrations allowed by the human body.