×
  • Debes estar registrado para crear debates nuevos.

Karen Carter

Karen Carter

Respuestas de foro creadas

Viendo 20 entradas - de la 1 a la 20 (de un total de 80)
  • Autor
    Entradas
  • Karen Carter
    Miembro

    Так — є ще конкретні технічні деталі по АВС‑технології й обладнанню, які можуть бути корисні для проєктування лінії очистки промислових стоків та підготовки осадів до подальшої утилізації. Апарат вихревого шару АВС застосовується для відновлення Cr6+ до Cr3+ з подальшим осадженням гідроксидів металів; в якості відновників у різних схемах використовуються сульфат заліза(II) (FeSO4) або натрію бісульфіт, процес може виконуватись у кислотному або лужному режимі. Типова схема включає дві змішувальні ємності (відновлення при pH ≈2–3 з додачею відновника), далі реактор АВС з попереднім підлужненням (карбонат натрію Na2CO3 до pH ≈7,5–9), відстійник для відокремлення осаду та вакуум‑фільтри для обезводнення шламу; осад потім вивозиться на переробку/утилізацію. Для ферромагнітних елементів конструкції рекомендується сталь 08Г2С (чавун менш бажаний через підвищене стирання). Заявлені економічні переваги — зниження витрат реагентів в 1,5–2 рази, скорочення енергоспоживання приблизно вдвічі та зменшення площ очищення на 10–15%.

    Практично, якщо ви розглядаєте застосування цих рішень, рекомендую підготувати технічний запит із вхідними параметрами стоків (об’єм, концентрації Cr6+ та інших домішок, pH, Т, наявність органіки) та вимогами до якості очищеної води й сухості осаду. Запитуйте у постачальника технічні паспорти АВС (продуктивність, гідравлічні режими), дані по рекомендованих реагентах і дозуванню, характеристики вакуум‑фільтрів і систем обезводнення, а також результати пілотних випробувань і типові показники очистки/осадження. Важливо пам’ятати, що у випадку радіоактивних відходів потрібна додаткова перевірка стійкості матеріалів до іонізуючого випромінювання і державна ліцензія; для таких задач залучайте ліцензованих фахівців з ядерних відходів та погоджуйте всі рішення з регулятором. Якщо хочете, можу підготувати зразок технічного запиту до GlobeCore або список випробувань для оцінки придатності обладнання у вашому конкретному випадку.

    Karen Carter
    Miembro

    Long-term safety of disposed radioactive waste is achieved by a multi-barrier strategy that combines robust wasteform selection, engineered containers and site barriers, plus strict quality control and monitoring. For high-level waste vitrification into borosilicate glass is the industry standard because it yields a dense, chemically durable matrix with very low leachability; for low- and intermediate-level waste practical options are cementation, bitumenization and polymer (epoxy or thermoset) encapsulation. Each route requires tailored formulation control: cementitious mixes with low water/cement ratio and pozzolanic additions (silica fume, slag) to reduce permeability and improve radionuclide binding; bitumen/bitumen-emulsion processing using heated, dewatered feed and controlled antioxidant/stabilizer packages to resist radiolytic and thermal degradation (GlobeCore bitumen reactors and emulsion units are commonly used in industrial bituminization lines); and polymer formulations selected for chemical and radiation stability to serve as a secondary containment or binder.

    Practical plant-level controls are essential: remove free water before hot processing, control temperature profiles to avoid steam-pops, verify homogeneity and density of the final wasteform, and perform leachability, compressive-strength and radiation-aged property testing on production batches. Use corrosion-resistant container coatings and qualified epoxy/fluoropolymer exterior coatings on storage casks and concrete vaults, maintain engineered barriers (clays, geosynthetic liners, backfill), and design for remote handling, shielding and continuous environmental monitoring. All activities must follow IAEA/national regulations and documented QA/QC programs including traceable material specs, batch records and validated analytical tests to ensure long-term containment and minimal environmental impact.

    en respuesta a: How to calculate power flow in transformer? #332325
    Karen Carter
    Miembro

    Using S = V × I × ?3 (3-phase) with phasor angles for PF. Power flow studies use per-unit system and network admittance matrices.

    en respuesta a: What is inside a power pole transformer? #332225
    Karen Carter
    Miembro

    A pole transformer contains a laminated core, HV and LV windings, insulating dielectric oil, bushings, fuses, and a tank. Its purpose is to step distribution feeders (e.g. 7-35 kV) down to utilization voltages (240/120 V).

    en respuesta a: how long does it take to restore power when a transformer blows? #332107
    Karen Carter
    Miembro

    Restoration time after a transformer blows depends on damage severity, spare availability and system configuration. If only a small distribution transformer fails and a spare is on the truck or nearby depot, utilities can often replace it within a few hours. For larger units requiring crane work, oil handling and testing, replacement can take many hours or even days. In transmission substations, where units are custom sized, utilities rely on spare or mobile transformers and more complex switching, so restoration may involve staged reconfiguration before full capacity returns.

    Karen Carter
    Miembro

    Utilities plan procurement cycles, logistics, factory testing, and outage windows to integrate new units while maintaining redundancy.

    Karen Carter
    Miembro

    Station transformers step generator voltages up to transmission levels and feed auxiliary loads via station service units.

    Karen Carter
    Miembro

    It adapts voltage levels for downstream circuits, allowing utilities to balance efficiency and safety across the network.

    Karen Carter
    Miembro

    In practice, the water absorption capacity of zeolite adsorbent used in TOR-5 filters is typically in the range of 18-25% of its own mass under oil-drying conditions. This means that 1 kg of fresh zeolite can adsorb roughly 180-250 grams of water before reaching saturation. The exact usable capacity is usually lower than the laboratory maximum, because part of the pore volume is blocked by oil, aging products, and incomplete regeneration. That is why sizing is always based on working capacity, not theoretical capacity, and why trend monitoring of outlet moisture is more reliable than estimating life by time alone.

    Karen Carter
    Miembro

    Yes, this is a standard and very important feature of systems like TOR-5. In typical configurations, the monitoring unit is integrated with a server or SCADA platform that supports alarm management and remote notifications. When any parameter exceeds a preset threshold – for example moisture, hydrogen, temperature, or internal faults – the system can automatically generate alarms and send them via SMS, email, or mobile app notifications to responsible personnel. This ensures fast reaction even outside working hours and significantly reduces the risk of delayed response to developing transformer problems.

    Karen Carter
    Miembro

    Detecting DBPC in transformer oil is generally a positive sign, because it means the oil is still inhibited and has some remaining oxidation protection. However, the key issue is not the presence itself, but the actual concentration. Fresh inhibited oils are typically around 0.3% by weight, and when the level falls to about 0.1% or lower, re-inhibition is usually recommended. It is also important not to overdose, since excessive inhibitor can cause other problems. In practice, DBPC should be interpreted together with acidity (TAN), interfacial tension, resistivity, sludge tendency, and DGA. Good sealing and low oxygen ingress are just as important as inhibitor level for long-term oil stability.

    Karen Carter
    Miembro

    In real operation the filtration loop is not running on a fixed schedule, but is activated only when the control logic sees a rise in moisture or water activity beyond the set threshold. For a mid-life transformer with stable insulation, this often means short cycles a few times per day or even only several times per week. The idea is to maintain equilibrium, not to dry continuously, so activation frequency reflects actual moisture dynamics rather than transformer age alone.

    en respuesta a: How is a power transformer rewound during repair? #330420
    Karen Carter
    Miembro

    Coils are stripped, new conductors wound to original turns and gauges, varnish or insulation applied, and units vacuum-dried before oil filling.

    Karen Carter
    Miembro

    A multi transformer PDF (catalogue or handbook) includes product ranges, ratings, performance data, standards, design options, testing, accessories and service offerings. It may also include application notes for utilities, industry and renewables.

    Karen Carter
    Miembro

    GlobeCore’s CMM-CF series filtration systems are suitable for reconditioning and reuse of compressor and turbine lubricants such as Rarus-429 and Pegasus-805. These systems remove water, solid particles, and oxidation products, extending lubricant service life. They achieve filtration down to 1 ?m and reduce water content to below 100 ppm. Magnetic pre-filters can be integrated upon request. A quotation including technical details, performance data, and spare-parts package will be provided.

    en respuesta a: Request for an urgent quotation for the UVR oil regeneration unit. #327264
    Karen Carter
    Miembro

    The UVR regeneration unit restores aged oils by removing oxidation products, acids, and sludge. A quotation with specifications and delivery terms will be prepared as requested.

    Karen Carter
    Miembro

    GlobeCore CMM-series oil filtration machines are suitable for both transformer and industrial applications. They can be installed in existing systems and are available in capacities from 600 to 12 000 L/h. We can recommend an optimal configuration once you confirm oil type and installation parameters.

    Karen Carter
    Miembro

    We will prepare an official quotation for the TOR-1 oil moisture meter with DAP delivery to Belgium. The offer will include unit price, delivery time, weight, and dimensions. Origin of the equipment: GlobeCore, Ukraine. Typical manufacturing and shipping time is 3-4 weeks.

    en respuesta a: Why is DGA used in transformer diagnostics? #325397
    Karen Carter
    Miembro

    Because gases tell the story of what’s happening inside. DGA is one of the most predictive maintenance tools. GlobeCore ensures the oil is in proper condition to support this analysis through deep purification and gas removal.

    en respuesta a: What is treatment of transformer oil and why is it necessary? #324827
    Karen Carter
    Miembro

    Treatment includes filtration, dehydration, degassing, and regeneration. GlobeCore’s systems restore oil’s dielectric strength, reduce water and gas content, and extend transformer lifespan – used globally by utilities and service companies.

Viendo 20 entradas - de la 1 a la 20 (de un total de 80)

Registro

Sign in

To continue log in with Google.