Oil, Gas & Petrolium

ABSORPTION

Oil is hygroscopic to a certain extent, meaning it can absorb moisture directly from the air. The amount of moisture that can be absorbed is influenced by the relative humidity of the air and the saturation point of water solubility in the oil. Depending on temperature and pressure, this solubility limit will vary from about 100 ppm for low additive oil to several thousand ppm for high additive and certain synthetic oils. For any given water-in-oil saturation point and relative humidity of ambient air, an equilibrium will eventually be attained where the moisture moving from the air to the oil, and also from the oil to the air, is equal. So, dehumidifier is highly needed to maintain the moisture level.

ACID GENERATION DURING THE COMBUSTION PROCESS IN THE ENGINE

In the exothermic process, during the removal of heat decrease in temperature will result into formation of acid which would lead to loss in final product. Dehumidifier will control the moisture content so that there would not be formation of any type of acid and ultimately no adverse effect would be found in the final product.

CONDENSATION

Humid air entering oil compartments will often cause moisture condensation on the walls and ceilings above the oil level. Frequent temperature change cycles may greatly increase the rate of condensation. Eventually the condensation will coalesce and run down the casing walls to the bottom forming a layer of free water or puddle. Dehumidifier prevents condensation.

CORRISON DAMAGE

The most important factor in atmospheric corrosion, overriding pollution or lack of it, is moisture, either in the form of rain, dew, condensation, or high relative humidity (RH). In the absence of moisture, most contaminants would have little or no corrosive effect. So , humidity control is far major issue in oil, gas , petroleum industries.

CLIMATE CONTROL FOR BLASTING, COATING AND PETROLEUM

Temperature plays an important role in atmospheric corrosion in two ways. There is the normal increase in corrosion activity which can theoretically double for each ten-degree increase in temperature. Also if proper humidity control is not done then drying process will not be done in proper way which will result to product loss.

DRYING HEAT SENSITIVE PRODUCTS

In drying operation the material characteristics such as heat sensitivity, moisture contentand particle size are of great importance, which should be taken into account in selection of properdesign and conditions for the process.However, the high moisture content of these materials makes the process difficult.

POLYPHONIC STRESS CRACKING

Polyphonic stress cracking also known as Stress corrosion cracking (SCC) is the growth of crack formation in a corrosive environment. It can lead to unexpected sudden failure of normally ductile metals subjected to a tensile stress, especially at elevated temperature. SCC is highly chemically specific in that certain alloys are likely to undergo SCC only when exposed to a small number of chemical environments. SCC often progresses rapidly, and is more common among alloys than pure metals. The situation with buried pipelines is a good example of such complexity. Dehumidifiers control all these situations.

SULPHUR LEVEL IN FUEL GAS

Sulphur is a naturally occurring compound in crude oil. When fuel is burned the sulphurcombines with oxygen (SOx) to create emissions that contribute to decreased air quality and have negative environmental and health effects.If moisture content is not controlled than Sulphur dioxide which is emitted combines with water which results into formation of sulphuric acid which results negative impacts to product.

WORKING ENVIRONMENT CONDITION FOR MANPOWER AND TEMPORARY WORK AREAS

Humidity affects both thermal comfort and indoor air quality. For example:
• high RH (very moist air) will make people feel chilled in cold weather and hot and sticky in warm weather
• low RH (very dry air) can cause dryness and discomfort in the nose and make skin feel dry and itchy.

In addition to the direct effect on comfort, damp air:
• Facilitates the growth of fungi (mould) and bacteria that can cause respiratory problems and/or allergic reactions
• Provides the conditions for dust mite populations to grow, which can affect asthma sufferers
• Results in odours in poorly ventilated spaces because of fungal growth
• Will result in condensation forming on windows, walls and ceilings that are colder than the air temperature and potentially damaging building materials.

PRODUCT SELECTION-HUMIDITY CONTROL

MODERATE (RH VALUE 40 ~ 50%) Heat Recovery Dehumidifier Portable Dehumidifier

LOW (RH VALUE < 40 ) Desiccant Dehumidifier Desiccant Dry Cabinet