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Lng & Lpg Dual Boiler Steam Boiler

2016-08-29 17:48:06

ZBG manufactures qualified dual fuel boilers, burning coal, biomass, natural gas, coke oven gas, city gas, LPG, light oil, heavy oil and waste oil. Some clients recently consulted about LPG and LNG dual fuel boiler, steam boiler. 

WNS fire tube gas oil boiler

LPG / Liquefied Petroleum Gas

LPG production happens during the refining of crude oil. The composition is predominantly propane, butane, or a mix of these and other gases. In addition, extraction of LPG takes place directly from some of the oil wells. The calorific value is higher than the Natural gas in the range of 95 MJ /kg.

LPG can be in liquid form at a relatively low pressure of 2 to 5 bar at atmospheric temperature. This makes it convenient to handle in small cylinders. This coupled with the high heating value has made it the most popular household cooking gas in most of the third world countries. Governments subsidize LPG for domestic use, which makes it costly for other uses.

LNG / Liquefied Natural Gas

To overcome this drawback of availability, natural gas shipping takes place from available regions to other countries in liquid form. This is Liquefied Natural Gas (LNG). LNG has volume that is 1/600th of its original volume. This reduces transportation costs considerably. Liquefaction and transport require require special treatments and are highly capital intensive.

Liquefaction and transport of natural gas is at -162 Deg C. This requires specially insulated tanks in the ships that carry the LNG .
Removal of all impurities like sulphur, water and other elements is necessary for liquefaction which requires an elaborate pretreatment plant.
The receiving side also should have an LNG terminal for re-vapourising the LNG to its gaseous form.
A very high level of investment is required to set up an LNG plant. A typical plant would cost in the range of 2 to 4 billion US Dollars. In addition, investment is required to build receiving terminals and LNG carriers.
As the backbone of the project, the investor should have long-term supply contracts.
Transportation of LNG is much less risky than transporting oil. LNG transportation is at atmospheric pressure so any leakage of the liquid will vaporise to the atmosphere. This avoids any costly oil spills. Since all the impurities like sulphur are already removed this is the purest form of Natural gas.

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