LNG Storage And Transportation System Rapid Development
LNG Storage And Transportation System After the rapid development of LNG in recent years, it has become an irreplaceable part of the world's energy supply, which can alleviate the dependence on petroleum energy. In China, natural gas is gradually moving into people's lives, including natural gas vehicles, natural gas water heaters, as fuel and so on, the demand for natural gas is also increasing rapidly, LNG Storage And Transportation System in order to maintain the stability of natural gas supply, not only rely on pipelines to import natural gas, China's LNG receiving stations are also increasing rapidly, the LNG industry chain is becoming more and
LNG vaporization process is often used in three types of carburetor: open-shelf carburetor, submerged combustion-heated carburetor, intermediate medium-type carburetor. Open-shelf carburetor is based on seawater as a heat source, with a tube plate, the seawater spray on the surface of the tube plate heat exchanger to vaporize LNG. The area is larger, the capital investment is larger, but the operation cost is lower, the operation maintenance is easy to realize. Submerged combustion heating carburetor is a kind of direct water to exclude gas burner, gas intense stirring water, so that the heat transfer efficiency is very high, along the carburetor pipeline flowing water makes LNG vaporization. The heat transfer efficiency is higher, the shape is small, the installation cost is low, but the operation and maintenance cost is higher. Intermediate medium type Carburetor is medium for heat media, LNG Storage And Transportation System heat exchanger makes LNG vaporization.
The LNG receiving station has two kinds of treatment methods for bog: One is direct output, will produce bog direct pressurization, adjust pressure, etc. after processing, outside to the pipe network. This method is simple in process and not large in scale and suitable for small receiving stations. But the general large LNG receiving station, the LNG resources sufficient quantity, LNG Storage And Transportation System may provide the sufficient cold source, may through the evaporative gas condensation technology. Bog first pressurization, and then with the cold LNG heat, liquefaction, and then return to the LNG tank, but also to maintain the pressure stability in the tube.
Direct output Bog method if the compression process changes to multi-stage compression, bog pressure at the same time heat transfer, cooling, mixing, and then compression, this method reduces the bog temperature and reduces energy consumption. The process of evaporating gas condensation can reduce the initial pressure and achieve energy saving effect by reducing the initial temperature of evaporating gas condensation.
Based on the mature LNG technology, LNG Storage And Transportation System the construction of LNG receiving station in China should be planned ahead of time, proper construction of underground tanks and reasonable construction of storage tanks. The utilization of LNG energy must be planned well in advance, and other energy sources should be rationally allocated, rationally used and valued economically.
LNG arrives at the receiving station and is stored in a tank. LNG storage tanks are divided into two types: ground storage tanks and underground storage tanks. LNG Storage And Transportation System The LNG ground storage tank can also be divided into single capacity tank, double capacity tank, full capacity tank and thin film tank according to storage tank wall structure. Tanjong tank has a single layer of storage capacity, the periphery will usually be accompanied by cofferdam, the application of low pressure, low security. Double capacity tank has two-tier storage capacity of LNG, no cofferdam, generally suitable for large-scale storage tank, high safety. Full tank has two-tier storage capacity of LNG, no cofferdam work pressure slightly higher, the most widely used, high security. Thin film tanks have a single layer storage capacity for LNG, with less application and higher safety. The tank body of LNG underground storage tank is mostly below ground, with double structure, large storage capacity, LNG Storage And Transportation System small area of occupation and high safety.
The large LNG tank can be divided into two layers of tank structure. The outer tank wall is prestressed concrete structure, the upstream metal vault, and the top part of the arch is poured concrete. The inner side of the tank wall has a damp-proof board. The bottom of the tank consists of three layers of steel plate and insulation layer, the lowest layer is carbon steel moisture-proof board, the top two floors are Ni9 steel, each two floors to lay glass brick insulation layer. The inner pot is Ni0 just, the top is aluminum alloy ceiling, the aluminum alloy top application Derrick and the outer jar vault skeleton is connected, has the insulating layer, LNG Storage And Transportation System the inside and outside cans fills the oil expansion perlite insulation material, the tank wall has no pipe mouth, all the pipelines are connected by the initiation hole and the jar.