Natural resources can be divided into renewable resources and non-renewable resources according to whether they can be renewable.Non - renewable resources are generally calculated in billions of years, with some less, it is impossible to reproduce.

The natural gas used in our daily life, whether artificial or natural gas, is directly or indirectly derived from natural gas, oil, coal and other non-renewable resources.In order to implement the scientific concept of development, create a conservation-oriented society and enhance the international competitiveness of cities, it is particularly important to protect and rationally use and economize on gas.

Natural gas

Gas system remains of ancient sedimentary underground for a long time, slowly convert and metamorphic cracking of gaseous hydrocarbons, main composition is methane, lighter than air, basic don't pollute the air in the process of burning sulfur dioxide, nitrogen displacement is less than 50% of coal, about 8700 calories per cubic meter of calorific value, which is about 2.3 times that of the artificial coal gas, also won't cause pipeline, table, kitchen is provided, such as corrosion, block, is a high-quality and efficient energy.At present, there are two main sources of natural gas used in The city. One is the west-east Gas pipeline from Xinjiang, and the other is the East-East gas from the Pinghu gas field in the East China Sea. At the same time, the Yangshan LNG project under construction has accepted the import of liquefied natural gas.

Because natural gas does not contain carbon monoxide, it usually does not cause poisoning.However, natural gas belongs to inflammable and explosive gas, still need to pay attention to safety when using, to prevent leakage of gas, in addition, when burning a lot of air, so use natural gas should pay attention to ventilation, otherwise it will cause incomplete combustion phenomenon, cause exhaust gas poisoning.

The artificial coal gas

Artificial gas can be divided into three types according to the raw materials and methods of gas production: the gas obtained by heating coal under the condition of isolating air is dry distillation gas;The gas produced by gasification of coal is gasified gas;The production gas obtained from heavy oil storage pyrolysis and storage catalytic cracking is oil production gas.At present, the gas formed by mixing LPG or natural gas is commonly called artificial gas, but its chemical composition is very different.

Artificial gas is a mixture of several single gases.Among them, the components of a single gas vary with the different types of coal and gasification technology. The calorific value of artificial gas used as urban artificial gas per cubic meter should generally be more than 3500 CAL. At present, the calorific value of artificial gas per cubic meter in this city is about 3800 CAL.

Carbon oxide is one of the flammable components of artificial gas. It is colorless, odorless and highly toxic.After inhaling a certain amount of carbon monoxide, people will suffocate and be poisoned or die due to lack of oxygen in the blood.At the same time, when artificial gas and air mix up to 5-50%, it will form a gas with explosion danger, which will cause an explosion when it meets the ignition.Therefore, the use of artificial gas, should be particularly careful attention to safety.

LPG

Liquefied petroleum gas (LPG), the lighter component obtained from oil fields or petroleum refining processes, is a mixture of saturated and unsaturated hydrocarbons that are flammable and explosive, with a maximum calorific value of about 27,000 calories per cubic meter.LPG itself is non-toxic, so it is known as green energy, but after the leakage and air mixed concentration of more than 10%, will produce anesthetic effect on the central nervous system of the human body, so we must also pay attention to safety.

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