Category Archives: Other oil purification

Compressor Oil for Piston-type and Rotary Compressors

compressor oil

Compressor oils are divided into classes depending on their application and requirements. The most common classifications is:

  • Oils for rotary and piston-type compressors;
  • Oils for refrigeration compressors;
  • Oils for turbo machines.

Let us consider in full detail the oil of the first type. It is used for lubrication of compressors in transportation and various industries. Requirements for the rotary and piston type compressor oils are defined by the composition and properties of the compressed gas which contacts the oil.

Apart from being used as a lubricant for the valves and cylinders of piston-type compressors, the oil is also used as a sealing medium for the compression chamber.

The main property of compressor oil is the thermal oxidation stability and the ability to prevent formation of coke deposits on the injection lines of compressors. The discharge temperature affects thermal oxidation stability.

Viscosity is also an important property of compressor oils. It determines the loss of energy through friction and wear of the surfaces of parts and seals of piston rings

Purity of compressor oils

Due to the fact that the application of compressor oils is similar to application of piston engine oils, the requirements for both oils are similar. Both are subjected to abrasion in a cylinder-piston group and in a crank mechanism.

The presence of water in compressor oil is determined by the Dean-Stark method, and is not allowed.

Cleaning of compressor oils

Contaminated with mechanical impurities and water, the compressor oil can not be used for its intended purpose.

The oil purification units by GlobeCore remove mechanical impurities, water and gas from compressor oils. Clean oil increases the performance of compressor equipment and reduces potential downtime. GlobeCore plants extend the life of both the oil and the compressor.

To receive advice on compressor oil purification plants, please call the numbers on our website in the “Contacts” section.

Combined Methods for Waste Oil Purification

Waste Oil Purification

Waste Oil Purification. Waste oil treatment uses a combination of approaches based on different methods (force field and porous membrane).

Centrifuges use a combination of electric and centrifugal fields. The electric field is generated by the outside power source or the triboelectric effect, creating a non-uniform field that improves the efficiency of cleaning.

The cleaning efficiency of waste oil can be increased with ferromagnetic particles in magnetic and centrifugal fields. For this purpose the centrifuge rotor is equipped with permanent magnets. Also, purification is improved by combining force fields and porous filters.

Waste Oil Purification. There are also hydrodynamic filters which combine the inertial forces and filtration. The filter cleans itself in the process, when the oil flows along the filter membrane or the membrane is moved against the oil flow. The character of the movement may vary: recurrent, rotary or reciprocating.

The main advantage of the hydrodynamic filters with a fixed filter element is their simple design and minimal maintenance. But their drawback is losing some of the cleaned oil along with waste. In general, we have the following pattern: the higher the degree of purification, the greater the losses. The solution would be to move a filter against the oil stream, but this complicates the design of the cleaner and the use of mechanical, pneumatic or hydraulic gear system. The cleaning efficiency of the hydrodynamic filters can be improved with electric precipitation devices.

Filtering centrifuges combine centrifugal force and filtration. The wall of the rotor is made of porous material. The pressure difference across the filter is created by the centrifugal force, and the impurities get trapped in the filter material.

Magnetic filters combine filter elements for non-magnetic particles with a permanent magnet for ferromagnetic contaminants. The filter elements, beside the main function, also protect the magnets from oil aging products. Such devices can clean waste oil with a lot of metal particles.

Fyrquel Fireproof Liquid: General Characteristics and Purification Methods

Purification of Fyrquel

Purification of Fyrquel. Fyrquel synthetic fireproof liquid is based on phosphoric acid esters, which make it fireproof. This is very important when the material is used in critical conditions, such as:

  • gas turbine lubrication systems;
  • steam turbine electrohydraulic control systems.
  • hydraulic systems of furnaces for aluminum and steel melting;
  • air compressors.

Fireproof liquids reduce the risk of fire which exists with mineral oil

Fyrquel manufacturer states that self-extinguishing and fire resistance of this liquid does not depend on additives and replacements.

Some of the advantages of this product are:

  • protection of equipment against valve erosion;
  • good lubricating properties;
  • stability in long-term operation;
  • low chlorine content;
  • compatibility with all metals in terms of corrosion stability.

If stored correctly, the product’s storage life is five years or more.

Purification of Fyrquel fire resistant liquid

Despite its advantages over mineral oil, Fyrquel is also prone to water and particulate matter contamination. Excessive moisture can cause clouding of the liquid and its premature aging. The biggest danger is that it is impossible to detect aging visually, a special analysis is required. Therefore it is important to keep the liquid clean throughout its operation.

GlobeCore offers its CMM filtration units for this purpose. This equipment can work not only with mineral oil, but also with other cooling and lubricating liquids, including Fyrquel. Thanks to their mobility, the CMM units can be used for purification of oil on site. One cycle of processing is enough to:

  1. significantly increase life time;
  2. improve the reliability of operation of turbines, compressors and other equipment where the liquid is used;
  3. reduce the cost of purchasing new cooling and lubricating liquids.

Purification of FR3 Dielectric Fluid

Purification of FR3 Dielectric Fluid

The majority of dielectric fluids used in modern power transformers are mineral petroleum-based oils.  It is well known that this raw material is hazardous to the environment and in the case of contact with water or soil it can cause serious harm. Moreover, there are transformers with higher requirements regarding environmental damage and safety of people.  For example, this category includes the so-called “marine” transformers that are used on various ships, mobile and fixed drilling platforms, etc.  Such equipment requires applying of dielectric fluids capable of providing adequate fire safety of converter plants.

FR3 dielectric fluid is made from oils of vegetable origin, which makes its use safer than that of petroleum-based oils.  Manufacturers note the speed and completeness of biological degradation of this dielectric, its compatibility with conventional mineral oils, the possibility of raising transformer operating temperature without changing its design and insulation system, the absorption of residual moisture released by paper during aging.

But despite the advantages of FR3 dielectric fluid made from natural raw materials, as well as petroleum-based oils, it is subject to oxidation and aging processes.  It results in reduction of operating parameters of the dielectric, which jeopardizes the reliability of power transformers and other oil-filled equipment.  Timely cleansing and regeneration of dielectric fluids can restore their parameters to the normalized values and allows re-using them for their intended purpose.

GlobeCore is one of the leading manufacturers of equipment designed for purification and regeneration of dielectric fluids.  In July 2015 the Clean Marine-type plant was tested for cleaning FR3 oil.  The equipment was delivered to a marine drilling platform, operating 250 kilometers away from the coast of Nigeria.

The results confirmed the versatility and functionality of GlobeCore plants:  Parameters of the processed product were restored to normalized values.  Application of GlobeCore purification and recovery technologies can not only extend service life of FR3 dielectric fluid, but also improve the reliability of power transformers, reduce the risk of explosions and fires.

Purification of Turbine Oils

Purification of Turbine Oils

The basic purpose of turbine oils is cooling and lubrication of bearings of various turbo units that include gas and steam turbines, hydraulic turbines, turbo-compressor machines, etc.  In addition, this oil can be used in turbine control systems as operating fluid. It is also known to be used in hydraulic and circulation systems of industrial machinery.

Working conditions put forward additional requirements to turbine oil, which include: good stability against oxidation, no sediment with prolonged use, absence of formation of stable emulsion with water, etc.

In order to ensure such quality, turbine oil must be produced from high-quality oil with the use of deep purification methods.  It also requires special additives that improve water separation, anti-oxidation and anti-corrosion properties of turbine oil.

Sludge and moisture can be formed in turbine oil during usage.  This contributes to electrolytic erosion of bearings and reduces the reliability of turbo-generators shaft sealing systems and control systems.  At the same time bearing lining and thrust bushing wear out.  Turbine oil properties deteriorate, and its lifespan reduces.

According to statistics, 20 to 25% of power equipment damage is caused by a decrease in turbine oil quality and various disturbances in oil supply systems.

Therefore, turbine oil used in steam turbines and turbo feed pumps must meet certain requirements:

  • Acid number below 0.3 mg KOH/g;
  • Absence of dissolved sludge, solids and water.

GlobeCore offers a wide range of equipment designed for purification and recovery of all types of turbine oils.  Timely sampling and treatment of turbine oils using CMM-T-type plants allows restoring their physical and chemical properties to the normalized values and improving their durability.  It saves funds for the purchase of fresh oil and recycling of waste oil.  It increases the reliability of turbine equipment and the stability of electricity supply both to ordinary consumers, and to facilities of national importance.

A Detailed Look at Waste Oil Purification, waste lubricating oil purification and recovery.

A Detailed Look at Waste Oil Purification, waste lubricating oil purification and recovery.

A Detailed Look at Waste Oil Purification, waste lubricating oil purification and recovery.

In modern society, the problem of waste and used materials is gaining awareness, due to media attention and industry focus.

In ancient times most waste was “natural”, excluding the “alien picnic” theory, but these days, most waste comes from artificial sources, with industrial waste being a large part of it.

Focusing specifically on waste oil disposal, admittedly, this non-biodegradable product is often neglected in terms of recycling due to the cost of the operation. When businesses look for methods of waste oil disposal, they do not always take into consideration safety or even legal issues of the method. At times, news about oil dumps into the sea or into landfills is more common than advertising of waste oil regeneration.

Statistically, about 4.84 million tons of lube materials were used in the EU in 2013 (65% automotive and 35% industrial oil). In Europe in general, about 25% of oil is disposed of, 75% is collected, of which 25% is regenerated, 49% is used as fuel and only 1% is destroyed entirely.

This data appears to demonstrate that a comprehensive decision on waste oil recycling has been made. A quarter of the oil is purified and regenerated. Such recycling, being a safe process, results in a product which is not inferior to original oil.

Beside the ability to restore used oil, this process allows to cut expenses on purchasing new oil, making investment into oil purification systems viable. The process is also environmentally friendly, a factor increasingly important in modern times.

The process of used oil processing can be roughly divided into five stages. The first is to remove particulate matter from the oil by filtration. This measure is largely preventive for new oil, protecting industrial machinery from contaminants, which may enter with the oil after transportation. In a comprehensive oil purification process, filtration is only the first preparatory stage.

The second stage is to heat the oil to remove water, one of the main factors of oil’s aging. Free or solved water causes oil oxidation and will cause corrosion or oxidation of internal components of the equipment.

The chemical stage involves using coagulants to precipitate contaminants and remove the sediment. It is also possible to use adsorbents which can capture the remaining moisture or contaminants.

The fourth stage is focused on removing gasoline from the oil which is an environmental requirement.

The fifth and final stage is vacuum and heating the oil to remove gases and moisture along with all remaining contaminants.

The finished product, clarified and regeneration oil, can be resold in the market or reused. The problem of oil disposal is solved, and the business receives a pure product with excellent quality.

Is Coarse Filter Necessary in Modern Oil Purification Process?

Oil purification process

Oil filters are designed to remove contaminants and particles from motor, transmission, lubrication, hydraulic, or any other kinds of oils and fluids.

oil purification process

Oil purification process

The filter’s principle of operation is based on incoming pressurized oil from the pump being divided into a number of flat streams. Particulate pollutants move together with the oil. Then they enter annular spaces and remain there or on the surface of the filter, and the oil is pressed through the slots in the plates and gaskets within the filter. Particle size that are smaller than the clearance pass through the filter with the flow of oil. This is the difference between the use of non-identical types of filters – in the throughput of such devices.

There are two main types of filters: coarse and fine. Coarse filters are full-flow and process the entire volume of the liquid pumped.

The filter element typically consists of a set of filter plates and spacers. Oil passes through the gaps between the plates where contaminants are retained. Also included in these gaps are fixed cleaning plates, secured on a rod of rectangular cross section.

A housing in which filters are placed is divided into two isolated chambers: one for purified and one for unfiltered oil. In the past, turning the handle on the rod removed dirt which fell into the sump.

Recently, units which use coarse filters are are equipped with scrubber blades on a fixed stand, for filter slots. The blades enter the slots. To remove particles from the filter surface, a handle is pulled several times, rotating the plates around the fixed blades. The accumulated particles fall into the dirty oil chamber and fall to the bottom, not contamination filtered oil.

Improving the quality of oil by using modern purification systems requires a certain formulation of stabilizing and anti-oxidation additives and at least two stages of filtration through fine and coarse filters.

Most manufacturers of oil purification equipment increase the amount of filters in their units and also include fine filtration. Coarse filter must be replaced on a regular basis, since they can become clogged and will not let the oil through.

The coarse filter is a full-flow filter. However, coarse filters usually cannot retain particles smaller than 0.15 mm. Coarse filtration alone cannot guarantee oil purity.

Most often the manufacturers use a combination of filters in their units, improving the efficiency of purification and capture contaminants from the oil.

Industrial Oil Purification: Myth and Reality

Industrial Oil Purification

Industrial oil is used in machinery as a lubricant, improving operation and extending service life of equipment. For best results, used industrial oil must be changed. Used oil can change so much under the influence of temperature, air, light and contaminants, that further use becomes impossible. The oil accumulates colloid coke and ash, asphalt and tar, metal particles and water, mineral dust and many other contaminants. Oxidation of the oil causes deposits to form on the surfaces of the machinery. This oil must be drained and replaced with new, although it is hardly possible to completely remove the sediment.

Previously, the only viable and environmentally friendly solution was to submit the used oil for reprocessing. The used oil is purified using special equipment. The product is virtually indistinguishable from new oil. Due to the high cost of purification equipment, it made more sense to sell the used oil to recycling companies.

The cost of the product varies due to many factors. The price of used industrial oil depends on its type, amount, quality and the transportation costs. If the oil is sold for recycling, it can be regenerated. Regenerated industrial oil, which costs less than new product, is very similar to the new oil.

Modern technologies offer several methods of regeneration and purification of used industrial oil. Regeneration is viable because it allows to preserve this valuable resource.

Purification is the process of filtering and drying industrial oil. It is often a part of a larger process to fully restore the oil by removing contaminants, such as acids, ketone, aldehydes etc.

Special equipment for purification and regeneration of industrial oil uses several methods:

  • Mechanical: removal of water and solid particles from the oil (filtration, separation, settling, washing)
  • Heat: distillation, vacuum
  • Physical: coagulation and adsorption
  • Chemical: acid or alkaline purification (these processes require complex equipment and are only used if the previous methods are not sufficient.

Industrial oil purification is mostly limited up to the physical method, where special media absorb contaminant particles and water, completing the restoration. After the regeneration cycle is complete, the product’s quality is not inferior to new oil.

Using own equipment, a company can save on purified industrial oil, reduce the oil purchase budget and generally help the environment. In today’s environmentally friendly society, increasingly more facilities use regenerated oil.

Regarding the latter point, it should be noted that there is a common misconception that environmentally friendly technologies are expensive and the results of their application are not immediate. This myth must be dispelled. About a third of crude oil is used to make various industrial oils. Using regenerated oil in the company can reduce demand and the negative environmental impact and costs, increasing the facility’s efficiency.

Since regeneration and purification of industrial oils using modern equipment can be performed continuously, and in many cases without the need to stop the oil filled machinery, the use of such equipment is very cost effective. Using own oil purification system, a business protects its investment and reduces new costs.

One of the companies which develop and market industrial equipment for regeneration, dehydration, purification and degassing of transformer, turbine, industrial and other oil, regeneration of all types of mineral oil with clarification and color restoration, is GlobeCore. All products are duly certified. Quality control is ISO 9001:2001 certified.

The patented mobile oil purification units protect client’s business from cost overruns and expensive repairs. Some of the benefits are:

  1. Reduction or elimination of waste industrial oil disposal costs
  2. Prevention of down time
  3. Optimization of the mobile industrial oil processing and regeneration process
  4. Saving of up to 85% on purchases of new industrial oil by regenerating used oil
  5. Environmental benefits

Old industrial solutions are being replaced with new efficient ones to address some of the previously complicated or even impossible issues of efficiency, environment protection and cost reduction by investing into affordable industrial oil purification equipment.

Hydraulic Oil Purification Using Filtration Method

In most cases, hydraulic oil is used in the equipment which is sensitive to contamination.  Terefore, the defined technical requirements for these fluids are clear enough, and product manufacturers try to comply with them.

It’s not so long ago that all main consumers of hydraulic oil (machine tools, presses, etc.) were equipped with special filters with a cell size of 25 to 50 microns.  However, this size was not always adequate.  It was perfectly suitable for valve-type devices but not enough for systems with narrow passages and low expenditure.

If there is dirt or contaminants, the critical clearance has a direct impact on the functioning of the whole system and its degree of wear.  Now there is a stable formed classification of impurities that can cause a critical situation, in accordance with their size and number.

Experts identify primary and secondary contamination degrees of hydraulic fluids. Primary contamination occurs in the system prior to its commissioning and secondary contamination occurs after commissioning.

The value of purity and oil filtration has increased after the connection between contamination and roller bearing service life has been proved.

Over the past decades special filters have been used to remove solid particles from hydraulic oil.  Depending on the type of production equipment they can be installed:

  • in a tank outlet channel to remove contaminants that made it into oil together with air;
  • in the upper part of a tank for filtering hydraulic fluid, which is supplied thereto;
  • in a tank circuit to improve the level of cleanliness of hydraulic oil;
  • in recirculation lines;
  • in filter presses that are filtering oil supplied to a pump.

The structure of a hydraulic filter includes a filter element and a contamination indicator. As a rule, the movement of oil through the device occurs from the outside inwards.

The correct choice of cell size depends on the requirements put forward by critical nodes, and is usually performed empirically.

Most often hydraulic systems utilize filters with cell size from 3 to 40 microns.  If a device with a cell size of 1, 3 or 6 microns has been selected, attention should be paid to its filter cloth.  The matter is that viscous additives and contaminants can simply block the filter.

GlobeCore company offers СММ plants to solve the problems of hydraulic oil filtration both from primary and secondary contamination.  The equipment is versatile because it can effectively filter not only hydraulic oil, but also transformer, turbine, transmission, and other types of oil.  The plants are available in a mobile version which is very compact. This makes them very convenient to use: rapid transportation from one hydraulic oil consumer to another one and the ability to work even in hard to reach areas of the production plant is a huge advantage.  Depending on the required degree of oil filtering, this equipment is available with different filtering capacity of up to 5 microns.

The application of GlobeCore oil filtration processes can significantly extend the service life of hydraulic oil, reduce warranty service costs and improve the reliability of the equipment in which this oil is exploited.

Used oil filtration and regeneration

used oil filtration

Transformer use is subject to various factors which degrade its performance. First of all, it is the oxygen in the atmosphere which causes oxidation of the insulating fluid. The process is also influenced by sunlight and increased temperature. If there is acid in transformer oil, it has detrimental effect on the transformer construction materials.

The degree of oxidation is characterized by such indications as acid number and water extract reaction. Acid number is the number of milligrams of potassium hydroxide required for neutralization of acid in the oil. The water extract reaction shows the presence of insoluble acids in the oil. High quality insulation fluid must show neutral water extract reaction.

Viscosity and flashpoint are also important oil parameters. Low viscosity is important to dissipate heat from the hot parts of the transformer. As for the flashpoint, it must not be less than regulated, to prevent ignition of oil in case of transformer or switch overload.

Another important quality factor is the presence and amount of particulate matter. Most often this comes from paint, insulation etc. Not all particles come from construction materials. Carbon forms in arcs and oil decay products form sediment. Particulate matter reduce the dielectric strength of the fluid and may short the energized elements of the transformer.

Oil color is also important. Fresh oil is usually light yellow. With time, as the oil accumulates decay products and tar, the color turns dark brown.

If the transformer oil no longer complies with the required quality, restoration of the oil should be considered. This can be done by filtering and reclamation the oil.

GlobeCore is one of the world’s leading manufacturers of equipment for transformer oil processing and power transformer servicing. By using GlobeCore units when the oil’s acidity nears the critical level improves reliability and extends the life of the oil and the transformer. The GlobeCore process can fully restore the performance parameters of transformer oil.