What are the ways to balance the supply and demand of city gas?

The gas supply and demand balance method refers to the method of achieving a balance between urban gas production and uneven gas consumption. Balanced gas confession can set up peak shaving gas sources, use gas storage facilities, etc.

The gas supply and demand balance method refers to the method of achieving a balance between urban gas production and uneven gas consumption. Because the gas supply volume of the gas source cannot be completely changed according to the change of gas consumption, in order to ensure the uninterrupted gas consumption of the user's gas requirements, the slag balance between gas production and use must be considered. Gas supply and demand leveling or quiet balancing methods are generally divided into:

There are three types of methods: changing the production capacity of the gas source and setting the peak shaving gas source, using the buffer user and playing the role of scheduling, and using the gas storage facility.

Gas is a general term for gaseous fuels, which can be burned and released to release heat for residential and industrial use.

1) Natural gas.

A naturally occurring combustible gas that exists underground is called natural gas.

2) Artificial gas.

It is a general term for all kinds of artificially made gas, and coal and heavy oil are its raw materials.

3) Liquefied petroleum gas.

The production of liquefied petroleum gas (LPG) is mainly produced from the cracking process of refining petroleum in oil refineries. Liquefied petroleum gas can be obtained in atmospheric and vacuum distillation, thermal cracking, catalytic cracking, platinum reforming and delayed coking in petroleum refineries and petrochemical plants.

4) Alternative natural gas.

Liquefied petroleum gas is heated and volatilized into a gaseous state in a special equipment, and a number of air (about 50%) is mixed in at the same time to expand its volume, dilute its concentration, and reduce its calorific value (close to the calorific value and Huabai index of natural gas), which can be regarded as natural gas**.

It should be noted that the gas ** in urban areas is mostly monopolized, and basically there is only one gas company in a region, because the laying of gas pipelines occupies too much municipal space, and there are rarely two gas companies competing for a community. Therefore, the type of gas is determined by the monopoly, which basically chooses the best type according to the local situation.

For example, if you have a big steel mill next to your house, basically your home is piped gas, using the by-products of the steel mill.

If your home is near a natural gas field or near the main pipeline of the West-to-East Gas Pipeline, you may be using natural gas.

The above personal opinion.

There are three types of natural gas, coal gas and liquefied petroleum gas.

Summary. Hello, the demand for urban gas is generally calculated on the basis of annual gas consumption. The annual gas consumption mainly depends on the type, quantity and gas consumption indicators of users, and due consideration is given to the urban gas development plan. <>

Hello, the demand for urban gas is generally calculated on the basis of annual gas consumption. The main annual gas consumption depends on the type and quantity of users, and the index of reallocation and gas volume, and due consideration is given to the development plan of urban gas. <>

Answer: C

Pressure conveying equipment is the heart of the gas transmission and distribution system, used to increase gas pressure or transport gas, and the pressure conveying equipment currently used in the medium and low pressure two-level system includes roots type drum balance chiff and reciprocating press.

Broadly defined, natural gas refers to all gases that occur naturally in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, biosphere, and lithosphere. 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, mainly in oilfield gas, gas field gas, coalbed methane, mud volcanic gas and biogenerated gas. Natural gas can be divided into two types: associated gas and non-associated gas.

Accompanied by symbiosis, the oilfield gas that is produced at the same time as ** is called associated gas; Non-associated gas includes pure gas field natural gas and condensate field natural gas, both of which exist in a gaseous state in the formation. After the natural gas in the condensate field flows out of the wellhead from the formation, with the decrease of pressure and temperature, it is separated into two phases of gas and liquid, the gas phase is the natural gas of the condensate gas field, and the liquid phase is the condensate, which is called condensate.

1) Liquefied natural gas (LNG).

Since natural gas is often not produced in industrial or populated areas, transportation and storage issues must be addressed. The main component of natural gas is methane, which has a critical temperature and cannot be liquefied by pressure alone at room temperature. The liquefaction and storage technology of natural gas has gradually become a major advanced technology.

At present, liquefied natural gas (LNG) has become a new industry in China and is developing rapidly. In addition to solving transportation and storage problems, liquefied natural gas (LNG) technology is also widely used in peak shaving devices when natural gas is used.

2) Liquefied coalbed methane.

China is the world's largest coal producer, and the corresponding reserves of coalbed methane are also very large, and the reserves are basically the same as natural gas. Its basic ingredient is methane. In addition to being a cheap chemical raw material, it is mainly used as a fuel, not only as a living fuel for residents, but also as a fuel for transportation vehicles such as automobiles, ships, and airplanes.

Due to the high calorific value of coalbed methane, the combustion products have less pollution to the environment, and are considered to be high-quality and clean fuels.

Therefore, the city's ** natural gas is liquefied petroleum gas, which is generally 12t

The answer upstairs was professional but a bit outdated. City gas (liquefied petroleum gas, coalbed methane, dry gas, natural gas), liquefied petroleum gas is the majority, but at present, the utilization and development of natural gas is mainly promoted, the calorific value of natural gas is high, the emission meets international standards, and the best economy. It is truly low-carbon and environmentally friendly.

So most cities are now replacing natural gas. The state is also vigorously stepping up the construction of natural gas pipeline networks.

In line with the national standard GB17820 "natural gas".