Liquefied natural gas

Japan has been the world's largest importer of LNG, with more than 75 percent of its LNG imports used for power generation and 20 to 23 percent used as city gas. South Korea is also a big importer of LNG, with its power industry being the largest user of Korea Gas Corporation (Kogas), consuming more than half of the country's total LNG imports.

There are already many gas-steam combined cycle power plants fueled by natural gas or liquefied natural gas in the world. Between 1999 and 2020, about 90% of planned new electricity generation in the United States will be generated by natural gas, by which time the share of natural gas generation in the United States will reach 33% [3]. The combined cycle power stations that emerged in the 1980s mainly generated electricity from gas turbines (accounting for about 2/3 of the total electricity), and the pure efficiency of the power station has reached more than 50%, while the efficiency of conventional coal-fired steam turbine power stations is only 30% ~ 35% [3]. Gas turbine power plants and combined cycle power plants not only have high efficiency, but also good mobility, short running time from unit start-up to full load, which can be used for base load operation and peak load operation. In addition, combined cycle power plants have low pollution and high reliability.

China's "West-east natural gas Transmission" and other large-scale natural gas transmission and distribution projects have been completed. The first phase of the Guangdong LNG Station Line project was officially launched; The Fujian LNG project, with a total scale of 5 million t/ year and a total investment of more than 22 billion yuan in the first phase of the project, was also officially launched. The operation and start-up of these projects provide the necessary material guarantee for the natural gas power generation in developing China, and will certainly play an important role in alleviating the contradiction between energy supply and demand in China and optimizing the energy structure.

2, ceramics, glass and other industries

Some enterprises with large energy consumption are often far away from the city or the natural gas pipeline, or can not get the natural gas transported by the pipeline, in this case the advantages of LNG are more obvious, the most typical is the ceramic factory, the use of LNG can improve the product grade and reduce the cost. Used in glass, ceramic manufacturing and petrochemical and building materials industry (non-alkali glass cloth), can greatly improve the quality of products or reduce costs, so as to change fuel or raw materials, and become a new benefit growth point for related enterprises.

LNG for small and medium-sized towns

In recent years, with the improvement of residents' living standards, small and medium-sized urban residents prefer to use clean energy. LNG, as a clean energy, has attracted much attention. The carbon dioxide and nitrogen oxides produced by natural gas combustion are only 50% and 20% of coal, and the pollution is 1/4 of liquefied petroleum gas and 1/800 of coal. Due to the large investment cost of pipeline laying, LNG gasification station has a better economy than pipeline gas. In small and medium-sized cities and towns, LNG gasification station can be used as a gas source for residents, in addition, it can also be used for the life of commercial and public institutions and the heating of users.

LNG is used as a backup gas source for peak regulation

As the peak regulating gas source of pipeline natural gas, it can adjust the peak of civil fuel system and ensure the safe and stable gas supply of city. In the United States, the United Kingdom, Germany, the Netherlands and France and other countries, LNG peaking devices are widely used in natural gas transmission and distribution systems, which play a role in peaking the volatility of civil and industrial gas use, especially the sharp increase in winter gas use. China has built and put into use in Shanghai.

LNG fuel for vehicles

As a clean energy for sustainable development, LNG has obvious environmental and social benefits. Replacing fuel with LNG can reduce sulfur dioxide emissions by 90% and nitrogen oxide emissions by 80%, which has obvious environmental benefits and is a high-quality alternative fuel for automobiles. It can be predicted that cities will gradually replace fuel with LNG or natural gas in terms of vehicle fuel, and in recent years, it has been valued and promoted by many countries in the world. Russia has accumulated a lot of experience in using LNG for car transport, rail transport, water transport and air transport. Most transport companies in the UK use LNG as their vehicle fuel.

According to the different storage methods of natural gas, natural gas vehicles are roughly divided into CNGV (compressed natural gas vehicles), LNGV (liquefied natural gas vehicles), and ANGV (adsorbed natural gas vehicles). CNG vehicles are widely used in China, and LNGV vehicles are being promoted. ANGV is in the development stage. LNGV vehicles will gradually develop into heavy vehicles, and will partially replace small CNG vehicles and buses. At present, LNG bus demonstration stations have been built in Urumqi, Beijing and Changsha in Xinjiang Province, and Beihai and Zhanjiang cities are preparing for construction. Tens of thousands of CNG vehicles have been modified in the country, but the use of LNG as a vehicle fuel is particularly worth promoting, and the construction of LNG refueling stations while taking into account CNG (compressed natural gas) refueling stations can meet current and future needs.