Which is dangerous natural gas or liquefied gas, and which is safer natural gas or liquefied gas?

I don't quite agree with the former. If you think about it, neither is dangerous if it is not leaked. Liquefied gas is slightly more dangerous for city gas users for the following reasons:

1. Both are at room temperature, the natural gas pressure is 2-4 atmospheres, and the gas volume and pressure in the gas stove connection pipe are not large. The danger is less (of course, for large fertilizer plants, chemical enterprises, gas stations, glass factories, etc., the higher their pressure, the greater the danger). The pressure in the LNG tank is 10-15 atmospheres.

The gas tank can store a large amount of gas, and if it is broken, it will be more lethal, and he will be like a time bomb placed at home.

2. Hazards generated. 1) Release heat to look at. Methane, a natural gas component, has a lower combustion value per unit volume, and propane, a liquefied gas component, has a higher combustion value per unit volume, and more heat is released.

2) From the leakage accumulation area and the ignition source point, natural gas is lighter than air and floats up after leakage, liquefied gas is heavier than air and sinks, the general ignition source point is located in the middle and lower layers of the space, and the general ignition sources such as mobile phones, open flames, static electricity, electrostatic sparks, etc. generated by household appliances are located in the lower layer of the space. Therefore, the deviability of ** is higher.

In short, liquefied gas is dangerous for city dwellers.

I've experienced liquefied gas and natural gas leaks of varying degrees that liquefied gas is dangerous for ordinary people, for example, liquefied gas tanks that leak out of ventilation for a long time, and a spark can burn.

The people around me have suffered countless burns.

A month ago, during the unloading process of the natural gas truck, the unloading column was broken and a large number of leaks were leaked, and it was less than 10 meters away from the scene, and I was commanded to rescue it by holding a cigarette--- but don't learn it, I was also an accident, and I couldn't do it.

Please understand the characteristics of both first:1Both are flammable, explosive, and dangerous goods, 2

Urban civil natural gas is clean gas, non-toxic and explosive. Lighter than air, the limit and air mixing ratio is 5-15%, after a long time of leakage, it is easy to start household appliances such as open flames, static electricity, refrigerators, etc., and the power is terrible to blow up the steel windows and collapse the floor, such as respiratory burns and large-scale burns caused by people indoors.

3.Liquefied petroleum gas is heavier than air, liquefied into the cylinder after pressurization to about 15 kg, the temperature is about -40 generally will not **, if the leakage occurs, close the angle valve, to prevent frostbite (used to town beer is good) such as in the fire, the power of the grenade (see how much gas is stored) is extremely difficult to extinguish! My experience is that natural gas is more dangerous.

But as long as you don't check it sloppily and often, there is generally no danger.

The battle between natural gas, liquefied gas and coal gas has been going on for many years, and users who support natural gas find it easy to use and don't have to travel thousands of miles to fill it; Users who support liquefied gas believe that liquefied gas has a higher calorific value and is more suitable for Chinese who like to stir-fry over high heat. Whether it is natural gas or liquefied gas, they all point the finger at pipeline gas, which is not safe and low in calories.

So, today, let's talk about who is safer between natural gas and liquefied gas, and is there only a difference between tanks and pipelines?

According to the data, the general household combustible gas accidents are ** and gas poisoning

1. Who is less susceptible to poisoning?

The combustible gas and main components commonly used in life are as follows:

Natural gas: methane-based.

Liquefied gas: mainly short-chain alkanes, may contain small amounts of olefins.

Gas: Carbon monoxide is the main body, and water gas will contain a certain proportion of hydrogen.

The carbon monoxide in the gas easily binds to the hemoglobin in the human body, resulting in hemoglobin not transporting oxygen and dying from lack of oxygen. Therefore, it is undeniable that gas is the most dangerous gas for poisoning. Methane and short-chain alkanes are not toxic in themselves, but methane can produce carbon monoxide when not fully combusted, which can also pose a certain threat to the human body.

Short-chain alkanes are less harmful to the human body and basically will not be poisoned. Therefore, liquefied gas is less susceptible to poisoning than natural gas.

Second, it is not easy to leak water when leaking gas**?

In terms of limit, the general combustible gas is dispersed in the air to the limit range, and it is easy to cause it once there is an open flame ignition. Therefore, if you look at it from the perspective of leakage, the higher and narrower the lower limit is, the safer it is, and in addition, higher than the upper limit will not. Here are the limits of the three gases:

Natural gas: The range is between 70%-90% depending on the gas source. Generally speaking, the approximate limit of natural gas ** is 5-15%.

Liquefied gas: It is generally approximate that the ** limit is in.

Gas: The general domestic gas is similar to coke oven gas.

In other words, natural gas is safer of the three types of gas, and liquefied gas and coal gas are easier**.

Note: While it's harder to do natural gas**, it's also absolutely impossible to prevent leaks!

In accident case studies, both natural gas and liquefied gas have their own safety advantages, but safety measures must be taken regardless of the energy source used.

Install a pipeline gas use combustible gas monitoring and alarm system. Install the corresponding leakage sensor in all places where pipeline gas is used, gas for gas, natural gas for natural gas, and then equip external or built-in solenoid valve main valve.

1. The difference between natural gas and liquefied gas is **.

1. Different uses: Natural gas is the cleanest energy source, in addition to being used as fuel, it can also be used for power generation, air liquefaction and food freezing. Liquefied gas is mainly used as a petrochemical raw material, used for hydrocarbon cracking to ethylene or steam conversion to syngas, and can be used as industrial, civil, and internal combustion engine fuel.

2. The material composition is different: the main component of natural gas is alkanes, and methane accounts for the vast majority. Whereas, the main components of liquefied gas are butylene, propylene, butane, and propane.

3. The pressure is different: the pressure of natural gas is 2000 Pa, so the nozzle hole is relatively large. The pressure of liquefied gas is greater than 2800 Pa, so the gas nozzle is relatively small.

4. The combustion temperature is different: due to the high pressure of liquefied gas, the flame is higher than that of natural gas, and the relative temperature is also higher.

2. Which is safe, natural gas or liquefied gas?

1. Which is safe, natural gas or liquefied gas? In general, natural gas is safer than liquefied gas, and the safety factor is very high. Natural gas does not contain carbon monoxide and is lighter than air, and once it leaks, it will immediately spread upwards and is not easy to accumulate to form ** gas.

It is environmentally friendly, almost free of sulfur, dust and other harmful substances, and produces less carbon dioxide when burned, which can be said to be a very environmentally friendly high-quality energy source.

2. And natural gas is also more economical, compared with liquefied gas, natural gas has the same calorific value as a year-on-year ratio, and natural gas is clean and clean, which can extend the service life of the stove, and is also conducive to reducing the expenditure of maintenance costs for users, improving life, and using safe and reliable natural gas, which will greatly improve your home environment and improve the quality of life.

3. Can natural gas and liquefied gas stoves be used universally?

Can natural gas and liquefied gas stoves be used together? Although they are all gas stoves, natural gas and liquefied gas stoves can not be used universally, liquefied gas is canned, and the pressure is larger, while natural gas is mainly transported by pipelines, and the pressure is relatively small.

When combusting, natural gas needs more air than liquefied gas, so their outlets are larger and smaller. If the liquefied gas stove is connected to natural gas, it is easy to have an accident.

It is also not recommended to change the liquefied gas stove to a natural gas stove by yourself, if you must change, it is best to ask the manufacturer of the stove to see if it can be transformed, and ask professional personnel to modify it.

1. In terms of composition, the main components of both are hydrocarbons, and the explosion-proof level is about the same.

2. In terms of daily use, the pressure of petroleum liquefied gas used daily is dozens of times higher than that of natural gas, and the liquefied gas tank is a pressurized vessel (equivalent to one, which is a large pressure cooker dozens of times larger than the pressure of a civil pressure cooker), and it is often connected (when changing bottles), and the probability of leakage is large. Therefore, natural gas is relatively safe, and it also saves a lot of trouble such as gas exchange and gas connection.

The management of pipeline natural gas is relatively standardized, and there are safety inspections. And liquefied gas is generally in a state of three irrelevance.

3. One of the conditions for causing a fire is that the concentration should reach a certain range (generally a substance is deliberately added to the natural gas to make the original tasteless become smelly, and it can also be convenient to find the leak in time), and the other is to have an open flame (temperature condition). And it generally does not backfire to the utility pipe after the point is discharged. As long as you're not unlucky enough to be close to the point, you won't usually see the whole building you're talking about, unless it starts a fire and spreads quickly.

Hello, both are equally safe without leaking, but natural gas is much safer for users who use both gases regularly. Because the pressure of natural gas is small, the gas volume and pressure in the gas stove connection gate are small, and the potential safety hazards are also small.

Natural gas is safer because the ** limit of natural gas is 5% to 15%, which is relatively safer than liquefied gas. Moreover, natural gas is non-toxic and easy to dissipate, the specific gravity is lighter than air, and it is not easy to aggregate into ** gas, which is relatively safe gas.

Natural gas is safer than coal gas because gas can cause gas poisoning if used incorrectly. It can be dizzy and dizzy, and it will threaten life safety, so it is best to consider which one is better to choose before use, at least to ensure the safety of yourself and your family, and it is better to choose natural gas to be safer.

Basically, it's all about the same, there will be security, even when building a building now. It is also more convenient to connect to natural gas, and it may be possible for people to be accustomed to the idea of using liquefied gas in the past.

Many cities now use natural gas, are they liquefied gas? Natural gas and "liquefied gas" are not the same. The combustion gas sources in people's lives are roughly divided into three categories: liquefied petroleum gas (Y), artificial gas (R), and natural gas (T).

Liquefied petroleum gas (referred to as liquefied gas): is a kind of petroleum tail gas left in the process of refining gasoline, kerosene, diesel, heavy oil and other oil products. Its main components are ethylene, ethane, propylene, propane and butane, etc., which are liquid in the gas cylinder, and once they flow out, they will vaporize into combustible gas about 250 times larger than the original volume, and are very easy to diffuse, and will burn or ** when encountering an open flame.

Therefore, special attention should also be paid to the use of liquefied gas. Coal gas is prepared from solid raw materials such as coal or coke through dry distillation or vaporization, and its main components are carbon monoxide, methane and hydrogen. Therefore, the gas is toxic and easy for the air to form a ** mixture, which should be used with great attention.

Natural gas: A broad term for naturally occurring gases buried in formation. However, the so-called natural gas usually refers to a hydrocarbon-rich combustible gas stored in the deeper part of the formation, while natural gas that coexists with oil is often called oilfield associated gas.

Natural gas is converted from organic matter hundreds of millions of years ago, and the main component is methane, in addition, according to different geological formation conditions, it also contains different amounts of low-carbon alkanes such as ethane, propane, butane, pentane, hexane, and non-hydrocarbon substances such as carbon dioxide, nitrogen, hydrogen, sulfides, etc.; Some gas fields also contain helium. Natural gas is an important energy source that is widely used as city gas and industrial fuel; In the 70s, natural gas accounted for about 18 19 of the world's energy consumptionNatural gas is also an important chemical raw material.

The calorific value of natural gas combustion per cubic meter is 8000 kcal to 8500 kcal. The calorific value of combustion per kilogram of liquefied gas is 11,000 kcal. The specific gravity of gaseous liquefied gas is kilogram cubic meters.

The calorific value of combustion per cubic meter of liquefied gas is 25,200 kcal. In this way, it can be seen that the calorific value of one cubic meter of liquefied gas is three times that of natural gas, but there are reports that the calorific value of liquefied gas is seven times that of natural gas. Each bottle of liquefied gas weighs kilograms, with a total calorific value of 159,500 kcal, which is equivalent to the calorific value of 20 cubic meters of natural gas. 】

In terms of hazardous substances, liquefied gas is safer than natural gas, and in terms of the highest limit, natural gas is safer than liquefied gas.

1. Liquefied gas is mainly short-chain alkanes, which is very harmful to the human body and basically will not be poisoned, while natural gas is mainly methane, which will produce carbon monoxide in the case of insufficient combustion, which has a certain threat to the human body. So of the two, natural gas is more likely to be poisoned.

2. Gas has a limit, and generally combustible gas is dispersed in the air to the limit, which is easy to cause once there is an open flame ignition. The lower line of the limit is higher and narrower, the safer, and the higher the upper limit of the limit will not. The ** limit of liquefied gas is about 5-15% of natural gas.

So of the two, liquefied gas is easier**.

Liquefied gas and natural gas safety measures

Every time the liquefied gas is replaced, it is necessary to brush the soapy water to see if there is any leakage in the pressure reducing valve, connector and other parts. Replace the connecting tube with a new one after more than two years, and replace it immediately if it is found to be brittle or aged. Do not adjust the pressure of the pressure reducing valve too much.

Don't dump the residue at the bottom of the tank, the staff at the filling station will dispose of it for you.

Install the corresponding leakage sensor in all places where pipeline gas is used, liquefied gas for liquefied gas, natural gas for natural gas, and then equip external or built-in solenoid valve main valve. There is no need to worry that the old pipes cannot be changed, there are special equipment for the old pipe valves.