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[ Resin Coalescers ]

Oleophilic resin coalescers are used for the removal of free oil from aqueous streams.

Unidro has a decades-long experience in supplying resin coalescers, and has developed a unique design based on the use of two different kind of oleophilic media (“dual step” coalescer).

The most common application of this technology is the treatment of the potentially contaminated condensates in oil refineries.

Many among the most famous international Oil Companies have successfully installed Unidro coalescers, all around the world.

A Self-regenerating Process

In the resin coalescer, feed water upflows through a sandwich-packed layer of oleophilic resin. Due to the oleophilic properties of the filling media, dispersed oil droplets tend to adhere to the resin beads, thus forming an oily film all around the bead. Once the film grows, it is released by the resin and dragged by the water flow through a second oleophilic media section, where the oil droplets do aggregate to form even larger drops.

At the outlet of the second oleophilic section, water is discharged from a conveniently located outlet nozzle

Application and Performances

Deoiling of contaminated condensate is the typical application of the resin coalescer, which is normally part of a complete treatment unit that includes a pre-filter (installed upstream the coalescer) and an activated carbon filter (installed downstream the coalescer).

Starting from an oil content of several tens of milligrams per liter (up to 100), a typical coalescer performance would reduce the oil concentration down to around 1 ppm. The downstream carbon filter provides final polishing to the condensate, bringing the residual oil content to ppb values. The key added-value of installing the coalescer is the large extension of AC media life before exhaustion, which is proportional to the oil content reduction.

As the coalescer is sensitive to the presence of solids, an upstream pre-filter is normally installed, to protect the oleophilic resin from rust particles that are likely to be present in the condensate.

Condensate recovery and treatment

Our experience in the water treatment and utilities combined with the wide range of technologies and equipment available in-house, give us a full coverage of the different needs connected to condensate treatment and recovery.

Cartridge Filters

Unidro can provide a complete range of disposable and backwashable cartridge filters for the standard to the most critical applications in the oil and gas industry, both for water, HC and process stre

Process Filters

Unidro process filters cover a wide range of application for gas and hydrocarbon filters, including solid removal from gas and liquid, liquid/gas and liquid/liquid separation.

Waste Water Treatment

With a wide experience in the treatment of industrial wastewater and the knowledge to treat difficult process streams, we can match the most demanding regulations worldwide and handle the critical problem of water reuse.

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Home / Pre and After-Sale Services / Blog Archives

[ Troubleshooting ]

Our specialists provide the best support to client team for a prompt and effective management of any trouble that may occur to the utilities units, even in emergency conditions.

As part of a SERVICE AGREEMENT or on a SPOT BASIS, a prompt and qualified support to your operators in case of troubles.

Prompt action

Immediate support from our specialists to client operation team in case of any trouble.

The action, depending on the needs, may include remote assistance (telephone, mail, video-conference), site survey by Unidro engineers, attendance to meetings at site and/or at client’s premises, contacting subvendors specialists when their involvement is required.

Root cause identification

A detailed report with summary of the evidences and information available, first remedial actions and root causes investigation for recommended long-term solutions is delivered and discussed with operators before the case is closed.

Assistance to operators

Unidro process team can provide a specialized full support and assistance in case of any issue associated to the unit design and process. Optimization of parameters, trouble prevention, and smooth operation plans.

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[ Spare parts and consumables ]

When selecting Unidro original spare parts, filter elements or consumable, you get much more than interchangeability, quality, prompt delivery: you get also the full performance guarantee and the make-good service that only a qualified technology provider can assure.

Our guarantee: Time, Quality, Performance

We ensure a prompt availability of a full range of interchangeable spare parts, and the supply of consumables such as original filter elements, selected filling media to maintain the performances of the unit under the designer process warranty. Upon request from end user, our after sales team is ready 7/7 to take immediate action to support the operators with emergency delivery when it is necessary.

Call-off Agreements: as easy as a phone call

The management of a complete SPIR form covering all itemized components of a package as well as the supply of consumables can be very easy and convenient within the frame of a Call Off agreement.

Unit prices agreed with multi-years validity, commercial terms and conditions fixed in the agreement and applicable to any individual delivery allows easy and trouble free orders from end users and prompt delivery of each piece when needed.

Filter elements

For filter elements, disposable cartridges and other consumables, thanks to in-house fabrication of some items elements and optimized design features of all our filters, we can implement an effective stock scheme either at Unidro home warehouse or at customer premises to grant immediate availability when needed.

In some selected locations, Unidro service and material storage may also be available close to site.

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[ Trainings programs ]

We offer a complete range of training schemes to match with the most specific needs of our clients

Training programs: custom tailored as everything we do

Our training programs are designed to match the specific clients’ needs and requirements.

Training to operators, automation and control, maintenance teams, chemical lab staff, process engineers: a specific program is planned for any specialist in order to create the skills required for a safe, reliable and trouble free execution of ordinary and extraordinary operations.

A complete education package

All our programs include troubleshooting tips, safety instructions and a number of practical recommendations. Each session may include room classes as well as site activity.

The support of slides and other educational, the distribution of technical material to the attendees, the check of the results via multiple choice questions at the end of each session are also part of each training package. The lessons may be included as part of periodical (annual) refresher training programs already existing in client organization.

Training schemes

Our basic training schemes includes:

START Initial training sessions for operators, which may be arranged before, during or after unit initial commissioning

REFRESH Periodical refresh sessions to operators and to introduce new staff to the most critical issues relevant to the package

L/L Lessons-learned advanced sessions, to take advantage of experience made on other similar units where Unidro is involved in

We assign a process engineer with the required skills to each program. We discuss and agree with the customer the details of the syllabus in advance, in order to fit perfectly with every individual case.

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[ Evaporators ]

Economical use of energy, process performances, equipment reliability: these are the crucial aspects our clients may rely on when chosing Unidro evaporators and clystallizers for their zld projects.

Our solutions

Unidro design includes different options for each project optimization:

Single and Multi-effect Evaporation Units
Forced Circulation, Rising Film and Falling Film Evaporators
Steam Driven, Thermal Recompression and Mechanical Recompression
Atmospheric and Vacuum

Application

Zero Liquid Discharge
Waste Water Treatment
Valuable Products Recovery
Water Reuse

Complete In-house Design and Fabrication

The complete design including process optimization, thermodynamic calculation, material selection and equipment sizing is done by our engineering team.

The main process equipment such as evaporator body and heat exchangers are manufactured in our certified fabrication shop.

The extent of shop pre-assembly is evaluated case by case with our customers.

Unidro can provide wide range of evaporation/crystallization technology and system, duly customized to match with various process condition and client needs, either as standalone Unit or part of a larger systems.

Condensate recovery and treatment

Cartridge Filters

Process Filters

Unidro process filters cover a wide range of application for gas and hydrocarbon filters, including solid removal from gas and liquid, liquid/gas and liquid/liquid separation.

Waste Water Treatment

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[ Contisand, Unidro Continuous Sand Filter ]

CONTISAND is a continuously operating sand filter with no need to stop the operation for backwashing or cleaning.

The principle of operation

Incoming water is distributed at the bottom of the filter and, flowing upward through the sand, reaches the filtered water outlet at the filter top side. Simultaneously with the filtration process, the sand is moving downwards, lifted by an airlift to the filter top where fouled sand is cleaned in a sand washer and the suspended solids are discharged with the wash water. Cleaned sand is then falling onto the filtering sand layer.

The advantages

CONTISAND does not require the usual backwash facilities (as pumps, sequencing ON/OFF valves, water hold-up tanks) nor PLC/DCS inputs as their operation is continuous and self-adjusting. They only need pressurized air or gas, either PA provided by utility system or generated by a dedicated small compressor.

No need for the filters to be put off service during backwash. Filtration and backwash occur simultaneously
The quality of filtrate is constant during the cycle
No need for storage of backwash water
No need for backwash pumps and blowers
No need of automatic sequencing valves and PLC to handle operation and backwash cycles

Applications

Municipal and industrials tertiary treatments
Final effluent treatment for phosphorus reduction
Industrial water recovery
Side stream filtration of cooling water circuits
Surface water treatment
Rain water treatment
Produced water filtration

The production of Unidro CONTISAND is standardized. Modular diameters are available and, for each diameter, different layer depth may be selected. Several materials for wetted parts are available (such as CS, SS, FRP and others). Fresh water, seawater, produced water, even saturated brine may be treated without any corrosion problem.

Waste water treatment and reuse

Produced water treatment

With experience in water treatment, a wide separation equipment portfolio and a specific know-how on wellhead processes Unidro is a highly qualified partner for PWT.

Pure water treatment

With the company experience of four decades in the water treatment and the high specialization of our engineering staff, Unidro can propose for every project an optimized combination of process steps to make the water available at site suitable as Cooling Water, boiler feed water and process water in the industries.

Process Filters

Unidro process filters cover a wide range of application for gas and hydrocarbon filters, including solid removal from gas and liquid, liquid/gas and liquid/liquid separation.