ENERGY SERVICES

Chemical cleaning is applicable to a wide range of applications from new construction to ongoing maintenance activities.

Post operations equipment may accumulate sludge or suffer significant corrosion during use which  can result in fluid obstruction, affecting heat transfer ability, high concentrations of contaminants such as LELs (low explosive limits) or H2S and more. Harpers utilizes our low Pressure Chemical Cleaning Skids in numerous  applications with a combination of our selective chemistries and engineered programs to meet all of  your challenges.

Chemical Cleaning Methods:

• The fill and soak method
• Fill and circulate method
• Cascading cleaning method
• Two phase flow cleaning method
• Slug flow cleaning method
• Vapour phase method
• Boiler boil outs
• Foam cleaning method
• Nozzle cleaning method

Harpers delivers a tank cleaning methodology that’s tailormade to each vessel or tank - changing the industry standard as well  as enhanced mechanical cleaning.

All sizes of tanks and storage vessels can be cleaned with our customized, and engineered approach. With our expert knowledge in confined space and non-entry cleaning, Harpers ensures your  tanks are safely cleaned on time and on budget.

Harpers Energy’s proprietary tank cleaning process enables tank cleaning in a chemical closed  loop environment. First, we custom engineer a solution that liquefies the sludge deposits in your tank  that would normally be removed mechanically. Then we apply the selective chemical solution with a  cutter stock and extract the content using engineered circulation process. Lastly, the tank is degassed  chemically, resulting in a superior level of surface and air cleanliness. And it can all be done without  the entry of people.

Benefits of non entry vessel cleaning:

• Slashing Disposal Costs: With our chemical tank cleaning process, organic solids are dissolved inside the tank, letting you avoid expensive hazardous waste disposal expenses.
• Shortened Cleaning Duration: Faster scheduling means less down time so that your plant can get back to operational capacity.
• Recycle Hydrocarbon Product: Rather than creating waste for disposal, recycle it using our specialized solvent cutter. Take this opportunity to generate revenue rather than creating costs.
• Environmental Performance: Our advanced chemical tank cleaning process also minimizes waste, leaving only insoluble, non-hazardous materials for disposal.
• Safety Performance: Our chemical tank cleaning methodology reduces or eliminates the requirement of personnel to enter the tank; work is performed in a closed loop system.

Pigging is completed to maintain efficiency and provide actionable insight to avoid potential problems on existing pipelines. It is often applied to remove new construction debris and assist during hydrostatic testing by dewatering and drying the pipeline.

Upon completion of piping construction, the line is required to be tested beyond its required operational pressure. Testing can be completed pneumatically with air or nitrogen, or it can be completed with fluids such as water, glycol, or a water/methanol mixture. We offer all forms of testing, with the experience to complete testing from design to infield completion. For every test conducted, we provide an engineered test procedure to be executed, as well as engineering support throughout.

APPLICATIONS WITHIN THE ENERGY INDUSTRY

• Pipeline pre-commissioning
• Pipeline maintenance
• Boiler maintenance
• Line dewatering
• Line drying
• Separating mediums in a pipeline

Our experienced team can undertake the most complex of pre-commissioning projects.

Specialist engineering, rigorous health and safety checks and seamless management are co-ordinated to ensure meticulous implementation of our pre-commissioning services which include:

• Installation
• Inspection
• Flushing and cleaning
• Pressure testing
• Functional testing

Aqua-milling, also known as water jetting, retro-jetting orhydro-jetting, is an efficient method of cleaning industrial piping  through the implementation of high-pressure water nozzles and jets.

Newly installed process piping typically contains foreign debris. These residual deposits can  compromise system reliability and lead to premature system degradation and failure during plant operation. In order to help preserve the long-term integrity of these process piping systems, hydro-milling can be used to remove all undesirable foreign contaminants and particulate matter.

Aqua-milling has been proven as an effective means of removing both large and fine debris from piping surfaces, including post-construction debris, by-products that result during fabrication, and operation-derived deposits, which are comprised of welding slag, mill-scale, loose rust, and mineral sediment.

BENEFITS OF AQUA-MILLING

• Reduced commissioning (i.e., steam blows) durations on boiler feedwater and  steam systems
• High degree of cleanliness on non-critical and critical systems
• Can be completed in a variety of conditions, including subzero climates
• Removes both fine and large particles
• Lower water requirements compared to conventional water flushes
• Water recycling capability with minimal waste disposal requirements
• Reduced costs associated with time and scheduling

Degassing and decontamination is a single step process designed for fast and efficient—and therefore economical—process plant cleaning.

• Enhanced steaming technique in which chemicals are injected into the steam stream to clean large process vessels, reactors, exchangers, and interconnecting piping.
• Used for post-operational cleaning to remove H2S (hydrogen sulphide), benzene, LELs, pyrophoric iron, mercaptans, and ammonia
• Reduces the hazards of dangerous gaseous elements inside petro-chemical processing equipment.
• Decontamination (solvent circulation) precedes degassing to minimise the source of contamination (e.g., sludge, heavy deposits, etc.).
• Harpers’ chemicals are specifically designed to provide a safe environment for vessel maintenance and our process reduces both the amount of waste and human exposure to dangerous substances during cleaning and maintenance work.

Custom-built in Sweden by DISAB Vacuum Technology, the DISAB Centurion is capable of removing all types of wet & dry sludge, slurry, filter cakes and sediments, as well as powders, granular materials, aggregates, ash and soil.

The DISAB features a telescopic boom with extension pipes to reduce manual handling for high level work. The machine also benefits from a low noise level (75 dBA at 7 metres distance) and a unique filter solution that reduces dust emissions to only 1,3 mg/m. The tank has a gross volume of 12,000 litres, while collected material can be discharged by tilting the tank or pneumatically through a hose.

This type of machine is typically used in industries such as steel, cement, power, heating, paper and pulpas well as in wastewater treatment plants, pumping stations and other industrial tanks. Harpers have DISAB trained operators who have over 60 years of experience operating DISAB machines between them, ensuring that work is carried out in the most efficient and cost-effective manner possible.

Applications include:

• Swarf (any grit or metal grindings, filings or turnings) removal
• Vacuum excavation
• Powder removal
• Dust removal
• Dry waste removal
• Toxic waste removal
• Hazardous waste removal

Harpers Environmental Ltd have five DISAB high-powered machines in its 63-strong fleet of vacuum tankers and industrial service vehicles