Use LNG tank can not know a few questions!
Comparison of ordinary storage tanks for LNG storage tanks
Tank is the production of our often used items, then the LNG tank this new type of tank I think we can also be quickly accepted, LNG storage tank compared with the ordinary storage tank, the use of more secure. LNG storage tanks can be divided into small LNG tanks with 5-50 cubic meters of storage tanks, often used for civil gas vaporization, liquefied natural gas (LNG) car filling, etc. The medium LNG storage tank has 50- 100 cubic meters, often used in satellite liquefaction devices, is also the best choice for alternative general tank.
1, LNG storage tank storage system consists of low-temperature storage tank, subordinate pipeline and control instruments, but it also belongs to the category of low-temperature storage tank.
2, LNG tank pipeline which uses austenitic stainless steel pipe. Austenitic stainless steel pipe has good low temperature performance.
3, according to the different forms can be placed separately (LNG) storage tank, insulation type using vacuum powder insulation skills, storage tank tube and pipe material selection of austenitic stainless steel, outer cylinder selection of fine carbon steel Q345R pressure Container steel plate. This LNG tank is not only long life, and the use of very safe, has been widely recognized by everyone.
How to use the tank
Lng the use of the tank is already very long and wide, then how should we use it. First we want to vaporize the liquid in the LNG bottle and raise the temperature of the cooling water. Next is the regulator: manually adjust the supply pressure. Lng tank low-pressure filter: low-pressure solenoid valve in the past to settle a CNG filter for the low-pressure filter, the filter should be able to filter more than 95% of the 40 micron range of air impurities without affecting the supply of natural gas, cleaning cycle According to the actual use of the gas cleanliness may be, usually 3 months. Lng tank low-pressure solenoid valve: infection moved to light or cut off the fuel supply, electronic control regulator: electronic regulator for the lng tank gas fuel planning machine in the gas pipeline in a key component. Lng tank infection is moving to control the planning machine gas supply. There is a control chip inside the electronic control regulator, which serves as a control instruction from the ECM, through the process of high-pressure solenoid valve control gas gas, so real-time control lng tank gas control machine air-fuel ratio.
Knowledge of inner tank material for tank
A lot of knowledge about the lng tank has been introduced, and the material of the lng tank is very important to the tank. I believe we all know, but at the present time, with the shortage of energy, energy structure adjustment and Environmental protection pressure increases, the demand for natural gas gradually increased. LNG storage tank annoying the tank material is also getting more and more attention.
The selection of low temperature materials for tankers in large LNG tanks is one of the key technologies in its design and manufacture. As the LNG tank operating temperature of -163 ℃, the requirements of the tank material not only to the necessary strength indicators, but also to ensure that the plasticity, toughness and good formability and weldability, while the price is relatively low. The most commonly used is 9Ni steel, also known as Ni9 steel, nickel content (mass fraction) of 8.5% to 9.5% of the ultra-low temperature steel.
Lng tank tank quality must be taken seriously, not only for the storage of gas transport needs, but also to protect the use of life and property safety must work.
How to reduce the risk of lng tank risk
Everyone should know that lng tanks are stored in some flammable and explosive dangerous gases, so the safety requirements are very high, these dangerous storage devices, the danger is always there, for some other related equipment is the same. Although the application of lng tank has been very good development, but inevitably there will be a lot of danger, today on how to reduce the risk of LNG storage tank to explain in detail:
1, LNG storage tank shell built with stainless steel, because the stainless steel tank can play a temporary capacity to accommodate the leakage of LNG liquid, fire resistance is higher than ordinary carbon steel, impact resistance and impact resistance, with good corrosion resistance, Can guarantee the life of marine tank.
2, LNG tank joints, valves, gasifier should be installed in the airtight excellent cold box, so you can contain the leakage of LNG, to prevent combustible gas diffusion, reduce the risk of the region.
3, to take an integrated design, LNG storage tanks, cold boxes, heat exchangers, chassis, water curtain protection pipeline, such as the overall design and manufacture, the formation of "gas unit", which is conducive to the overall control of risk, Product approval.
How to avoid problems when using lng tanks
For some knowledge of lng tank, I believe we already have a preliminary understanding, especially security issues, lng tank is mainly used for some gas storage, in order to avoid the use of some problems, for LNG The use of tanks we need to do the following:
1, to regularly analyze the concentration of acetylene in liquid oxygen, the concentration control in the 0.1 × 10-6 below, or should be discharged liquid oxygen;
2, the use of LNG storage tank for liquid oxygen closed storage, it must be monitored pressure to prevent overpressure;
3, liquid oxygen can not be splashed on the unprotected skin, in order to avoid serious frostbite;
4, when the tank has been empty all the liquid, but can not immediately heat, you must immediately close all the valves. Because the temperature inside the tank is very low, the wet air will penetrate into the interior through the connected pipe, causing the ice to clog the pipeline accident.
Lng excellent characteristics of the tank:
1, LNG storage tank production using advanced internal insulation structure design, than the traditional structure has a higher insulation performance and reliability, the use of independent innovation of the vacuum process and vacuum helium mass spectrometry leak can ensure that the tank vacuum life lasting, Static evaporation rate is better than industry standard.
2, for the use of innovative LNG storage tank modular pipeline design, compact, centralized control, easy to operate.
3, with a unique transport-specific lateral support and lifting lug, easy to safe storage tank, transport.
