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Author Archives: Dave Cockett

  1. How to Select the Right Pollution Control Technologies

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    Air pollution can cause both  long- and short-term effects on human health, damage to property and decrease atmospheric visibility. Air pollution can also have serious environmental effects, causing damage to the ozone layer, forests, and animal habitats.

    Air pollution control technologies are used to minimize or eradicate these harmful pollutants’ release into the atmosphere. These high-performance, efficient pollution control technologies, available from Anguil, provide seamless integration for optimal value and performance. This article will discuss how to determine the appropriate pollution control technology.

    Usually, low flow,  low concentration streams use catalytic recuperative oxidizers for optimal handling. If the concentration stream is in the range of 15-20% LEL, then either catalytic recuperative,  thermal recuperative, or regenerative thermal oxidizer (RTO) technologies can be used. And for those process streams that sit between 20-25% LEL, thermal recuperative would likely be the method of choice but an RTO with hot gas bypass is possible.

    Catalytic Recuperative Oxidizer (CATOX)

    CATOXs offer air pollution control by destroying HAPs (Hazardous Air Pollutants), VOCs and odorous emissions at substantially lower temperatures than thermal oxidation technologies through the use of a catalyst.

    CATOX air pollution control technologies lower the oxidation temperature, creating benefits such as decreased fuel usage, reduced thermal cycling, lower cost of construction materials and decreased fuel usage.

    Thermal Recuperative Oxidizer

    Thermal recuperative oxidizers are types of air pollution control technologies which destroy HAPs, VOCs, and odorous emissions that have been discharged from a range of industrial processes via thermal oxidation and heat recovery.

    Anguil’s thermal recuperative oxidizer air pollution control technologies  utilize flexible heat exchanger arrangements. The design is based on volume of airflow organic vapor concentrations and desired destruction efficiency.

    Regenerative Thermal Oxidizers (RTOs)

    RCO/RTO and Rotor Concentrator systems  typically have higher capital costs on low flow applications however they promote cost savings for high volume, low concentration streams which adds to their appeal.

    These air pollution control technologies are generally considered to be the most energy-efficient oxidizer as they use ceramic media to recover  up to 97% of the available energy. Anguil’s RTO has the capacity to capture and repurpose thermal energy produced during operation to minimize operating costs and the system’s overall energy consumption.

    RTO air pollution control technologies are fuel-free at very low VOC concentrations. There are multiple designs for faster installation and greater system flexibility, for the ideal RTO applications with large flow, low concentration process streams, and for a wide range of temperature and contaminant capability.

    Making the Right Selection

    The selection of the right pollution control technologies should be based on efficiency needs, destruction requirements and process parameters. Oxidizer manufacturers often endorse the improper abatement technology as they do not manufacture the best technology themselves.

    Anguil manufactures all of the thermal and catalytic oxidation systems, meaning they can offer an unbiased equipment selection, tailored to individual applications. We evaluate each pollution control technology for every application, allowing us to help our customers make informed decisions to meet their needs. To find out more, contact us today.

  2. Key Challenges in Industrial Wastewater Treatment

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    Many industrial processes produce wastewater discharge that can be difficult to manage due to pollutant volume, composition, and variability. It is critical to assess the physical and chemical characteristics of the effluent to determine a cost-effective and efficient process for industrial wastewater treatment.
    The Importance of Industrial Wastewater Treatment

    Clean water is an essential resource for both people and environments across the globe. Industries use fresh input water, and often produce wastewater that is toxic to humans, plants, and animals alike. To return industrial wastewater back to the source, effective industrial wastewater treatment is crucial. As the industry looks to reduce operational costs, effective and automated treatment systems have been a driving force of innovation in the sector for many years.Clarifier for Industrial Wastewater Treatment Though technological advances have emerged, challenges still remain.

    Some industrial effluents are extremely difficult to treat and often are a result of challenging industrial processes which form complex wastewater streams. Often a single wastewater can contain high levels of oil and grease, heavy metals, toxic or corrosive chemicals, each component requiring specialist treatment. This includes surface and groundwater impacted by industrial use which now also has to be remediated (PFAs, 1-4 dioxane are examples).

    Challenging effluents having high biological oxygen demand (BOD), chemical oxygen demand (COD, high levels of suspended solids (TSS) is why Anguil provides optimized, engineered solutions that work cooperatively as an integrated system. With the role and function of each component being considered to provide a complete, integrated system.

    One of the many challenges that facilities with industrial wastewater treatment face are the size and scale of operations required to adequately treat water. However, Anguil’s integrated system means that the overall footprint of the operation can be minimized in some circumstances.

    Additionally, Anguil takes ownership of the critical aspects of water treatment such as onsite wet-lab testing, logistics, advanced controls, automation, andIndustrial Wastewater Raw Sample and Filtrate integration. Anguil offers a single source of responsibility by managing all aspects of industrial wastewater treatment, from system integration to post-installation services so your company will get a cohesive customer experience.

    Anguil’s approach does not require the specific use of any particular product or technology, and as such, your treatment system can be fully customized to create the best industrial wastewater treatment solution for unique industrial processes, meaning it offers the utmost flexibility.

    Industrial Wastewater Treatment from Anguil

    Anguil seamlessly integrates industrial water treatment technologies into robust and effective treatment trains. Anguil specializes in the integration of market-proven wastewater treatment technologies to assist their customers with pollution problems but is also open to new and emerging technologies. Anguil’s treatment trains can handle challenging contaminants that are discharged from industrial facilities or extracted from remediation applications.

    Anguil provides industrial wastewater treatment for ultra-pure, clean process water as well as process effluent meeting the most stringent of process requirements and discharge limits. Our industrial wastewater treatment solutions offer a low cost of ownership and minimize the company’s environmental footprint by reusing and recycling water if desired by the customer.

    Anguil has 40 years of experience in industrial water treatment, creating engineering systems that meet or exceed specific technical requirements. If you would like to find out more, contact us today.

    Industrial Wastewater System Control Panel

  3. How Do Regenerative Thermal Oxidizers Work

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    Effective air pollution control is important in modern industrial facilities where the goals of ensuring regulatory compliance, minimizing environmental impacts, and maintaining a healthy bottom line, are all closely interlinked.

    Regenerative thermal oxidizers—sometimes abbreviated to RTOs—can play a crucial role in eliminating hazardous air pollutants (HAPs) and volatile organic compounds (VOCs) from industrial emissions efficiently and cost-effectively. So, what is a regenerative thermal oxidizer and how does it work?

    What are Thermal Oxidizers?
    Three Chamber Regenerative Thermal Oxidizer in Fabrication Shop

    Anguil Three Chamber RTO in Fabrication

    Thermal oxidizers are specialised combustion devices  integrated into the ventilation of industrial processes that generate potentially harmful pollutants. Exhaust fumes travel through the oxidizer, which is heated to temperatures in the region of 1500°F, causing HAPs and VOCs to break down and form harmless compounds like carbon dioxide and water vapour. These can then be discharged into the atmosphere.

    Although highly effective at destroying HAPs and VOCs, the problem with traditional thermal oxidizers is their extremely poor thermal efficiency. All heat energy employed in a conventional, direct-fired thermal oxidizer or vapor combustor is lost out the stack. An easy way to combat this is to employ a heat exchanger to recuperate thermal energy, but so-called thermal recuperative oxidizers (TROs) are limited to around 80% heat recovery rates and VOC destruction efficiencies of 99%.

    There is a better solution that guarantees industrial compliance, reaches destruction efficiencies of 99+%, and offers thermal energy recovery efficiencies of up to 97%: regenerative thermal oxidizers.

    Regenerative Thermal Oxidizer Design Principles

    TROs tend to use standard metallic shell-and-tube heat exchanger systems, while regenerative thermal oxidizers use ceramic media beds with higher thermal efficiencies. In a dual-bed regenerative thermal oxidizer, incoming process emissions are drawn or pushed through the first ceramic bed via a high-pressure fan and pneumatic flow control valves.

    The dirty stream exits the ceramic bed into the combustion chamber where burners rapidly break down contaminated compounds with a destruction efficiency greater than 99%. This purified stream is sent through a secondary ceramic bed where it relinquishes as much as 97% of its heat value into the exchange medium.

    Regenerative thermal oxidizers reuse this recovered heat by periodically reversing the flow direction, courtesy of the pneumatic valves. The ceramic bed that recuperated heat from the purified stream is then used to preheat the incoming emissions, while clean, cool air is exhausted into the atmosphere.

    This is not the only configuration, but it is the simplest one to gain a basic understanding of how regenerative thermal oxidizers work. Alternative systems include multi-chamber designs, although the same general principles apply.

    Benefits of Regenerative Thermal Oxidizers

    While some of the advantages of regenerative thermal oxidizers may be self-evident from their working principles, the extent of their value deserves further exploration. High-performance regenerative ceramic beds can enable fuel-free operation at very low VOC concentrations, as the cyclic flow reversal is so effective at reclaiming heat. Standard regenerative thermal oxidizers subsequently deliver extremely low operating costs for high air flow fume streams with low VOC concentrations.

    Regenerative Thermal Oxidizers from Anguil

    Anguil is one of the leading regenerative thermal oxidizer manufacturers worldwide. Our solutions are tried-and-trusted by business units across the global industrial landscape, because we understand the need to achieve multiple goals in tandem when it comes to selecting new air pollution control systems. Our cutting-edge regenerative thermal oxidizers guarantee compliance with the relevant industrial regulations, while ensuring the maximum process efficiency and system lifetime expectancy.

    Want to learn more? Head over to our contact page to get in touch with an applications specialist or submit your project specifications directly and we will get back to you as soon as possible with equipment sizing, estimated operating costs, and delivery times.