A low vacuum dehydration machine is a device used to remove water or other impurities from oil, gas, or other liquids. The machine works by creating a vacuum within a chamber, which lowers the boiling point of the liquid and causes the water to evaporate. The evaporated water is then removed from the chamber through a condenser, leaving the purified liquid behind.
Low vacuum dehydration machines are commonly used in the oil and gas industry to remove water from crude oil, natural gas, and other hydrocarbons.
The machine consists of a vacuum chamber, a vacuum pump, a condenser, and a control system. The vacuum chamber is typically made of stainless steel or other corrosion-resistant materials, and is designed to withstand the high temperatures and pressures required for the dehydration process.
The vacuum pump is used to create the vacuum within the chamber, and is typically a rotary vane or diaphragm pump. These pumps are designed to operate at low pressures and are ideal for the low vacuum dehydration process. The condenser is used to cool the evaporated water and turn it back into a liquid, which is then removed from the system.
The control system is used to monitor and regulate the temperature, pressure, and other parameters of the dehydration process. This may include sensors to measure temperature, pressure, and flow rate, as well as valves and controllers to adjust the flow of the liquid and the operation of the vacuum pump. The control system also helps to ensure that the machine is operating at optimal conditions for the most efficient and effective dehydration process.
The Low Vacuum Dehydration (LVDH Machine ) technique is mainly used for separating moisture content from the oil which is present in three forms:
a) Dissolved Form
b) Emulsified Form
C) Free form
The heating of hydraulic oil is performed indirectly and then that is poured into a vacuum chamber where it is scattered into a very thin layer of film thereafter it vaporizes & gets dissolved with gases at low temperature. How do separate water from oil? Now both air and gases that are derived from the previous process are now left to condense so that it gets separated from the oil. Our ultimate goal of heating oil indirectly at low temperature is to ensure that there is no burn off, hence no oxidation and no additional depletion of oil.
Low Vacuum Dehydration Machine & Desiccation – LVDH Specification are manufactured & assembled with extremely minute care & research and as per industry standards.
Comparative analysis of Vacuum Dehydration With Centrifugal water removals:
Centrifuging | Vacuum Dehydration |
Heating oil to Approximately between 70 to 80°C is required to efficiently extract water | Whereas in LVDH technology, the Water is removed from oil even less than < 55°C. |
Heating oil depletes additives. | No additive depletion. |
Must be used off-line. All related machinery must be stopped to drain oil into barrels / tanks for cleaning. | Can be used on-line, is therefore user-friendly. |
Somewhat cleans low molecular weight oxidized oil fraction | Easily removes low molecular weight oxidized oil fraction |
Cannot remove emulsified water. Gear pumps used in centrifuging increase emulsification. ; | Easy & total removal of free & emulsified water / moisture. |
Cannot remove low molecular weight oxidised oil fraction | Removes |
Cannot remove dissolved gases like Ammonia / Nitrogen. | Removes |
Cannot remove solid impurities below 10 micron, efficiently. | In conjunction with Electrostatic-oil Cleaners, removal efficiency is better than 0.01 micron. |
Centrifugal systems do not clean any dissolved gas | Clears the dissolved gasses very easily |
Many high speed moving parts requiring frequent maintenance | Only two pumps. Vacuum & discharge & slow moving parts. |
| Automatic water discharge. |
Heating oil to Approximately between 70 to 80°C is required to efficiently extract water | Whereas in LVDH technology, the Water is removed from oil even less than < 55°C. |
Depleting anti-oxidation additive | No additive depletion |
Somewhat clears emulsified water | Easy & total removal of free & emulsified water |
Somewhat cleans low molecular weight oxidized oil fraction | Easily removes low molecular weight oxidized oil fraction |
Centrifugal systems do not clean any dissolved gas | Clears the dissolved gasses very easily |
It consumes very High energy | As compared to the centrifugal system it consumes very low energy |
The extracted low-weight molecular oil gets accumulated in the hydraulic fluid and settles in oil. Hence (LVDH) low vacuum dehydration technique is used to clear the oil & ultimately bring back oil to its original properties.
This technology mainly evolves around the basic fact that the water boiling point is 100℃, and the vapor pressure above the water surface is atmospheric pressure, but when we reduce the vapor pressure to a vacuum condition up to 750 torrs, then the boiling point of water gets reduced from 100℃ to less than 55℃.
- Extracts water from oil
- Removes moisture from oil
S.NO
| Degrees of Cleanliness
| Adopting a Vacuum Dehydration Process
|
1. | 100% | Free and emulsified water alongside free gases |
2. | 95% | of dissolved Water |
3. | 90% | of dissolved gases |
Hence under this technique, there is a vacuumed chamber and a shower arrangement for the oil (mixed with moisture content). There is a heater arrangement that heats up the oil under controlled temperature settings of a maximum of 55℃ only when the heated oil is showered inside the vacuum chamber under a high vacuum, moisture particles would get evaporated or get vaporized under the vacuumed condition thereby clearing the moisture from oil. Hence Clean oil is collected at the bottom of the chamber and delivered into the system.
- Easy to operate for an efficient method for continuous removal of moisture from oil.
- No damage to oil and the unit offers dry, dehydrated oil.
- Significantly reduced residence time with fast and efficient heat transfer
- Reduced pressure drop
- Ability to process materials that are sensitive to thermal degradation or prone to
- fouling and ability to process high-viscosity and high-solids materials
- High evaporation ratios (> 95%)
- Easy to clean/maintain equipment
Their relatively high cost and the need for skilled personnel to operate and maintain the equipment. It also can be sensitive to temperature and pressure variations, which can affect the efficiency and quality of the dehydration process. Additionally, low vacuum dehydration machines are not suitable for liquids that contain dissolved gases or other impurities that would be carried over with the evaporated water.
In terms of maintenance, low vacuum dehydration machines require regular cleaning and replacement of parts. The vacuum chamber, condenser, and vacuum pump should be cleaned regularly to remove any debris or build-up that can affect the performance of the machine. The vacuum pump oil should also be checked and replaced as needed. Additionally, the machine should be serviced by a trained technician at regular intervals to ensure that it is operating at peak efficiency.
It is also important to note that low vacuum dehydration machines should be used with appropriate safety measures in place. The vacuum chamber and condenser can become extremely hot during operation, and the machine should be equipped with safety features such as pressure relief valves and over-temperature protection. Additionally, the vacuum pump should be protected against overloading and other potential hazards.
low vacuum dehydration machines are an effective way to remove water and other impurities from liquids, and are widely used in a variety of industries. They are typically efficient, low maintenance and can handle large volumes of liquid, but they also have certain disadvantages such as high cost and need of skilled personnel. However, with proper maintenance and operation, low vacuum dehydration machines can provide a reliable and efficient method of purifying liquids. It is important to consider factors such as cost, maintenance requirements, and safety measures when deciding whether a low vacuum dehydration machine is the right choice for a particular application
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