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Technology Engineering

Technologies
SDP Technology

Seawater Desalination Technology

Seawater desalination technology is suitable for industries
Description of the technology
Description of the essence and benefits of the technology

The seawater desalination technology uses the thermal distillation method in the Exerger FVE flash evaporator.

Before being fed to the desalination plant, seawater is purified from large suspended matter and mechanical particles and sent to the Exerger FVE flash evaporator. The evaporator produces deaerated distillate with a salt content of 0.5–5 mg/dm³ and a salt-containing concentrate.

The distillate (low-mineralized water) is sent to production needs, and the salt-containing concentrate is partially recirculated in order to minimize heat discharge and into the discharge collector, or for further processing, for example, evaporation to a dry residue with the release of useful products.

The result of using technology
Obtaining high-quality demineralized deaerated water suitable for feeding steam boilers and other technical needs
  • salinity: 1–2 mg/dm³
  • hardness: 0.001 mg–eq/dm³
  • chlorides, sulfates 0.6–1.2 mg/dm³
  • oxygen: less than 20 μg/dm³
  • temperature 30–40°С

Obtaining a secondary product - crystalline salt
The desalination unit allows for the complete processing of the source water and the production of distillate and salt-containing concentrate, which can then be processed to a dry matter and useful products can be extracted from it.
Utilization of waste steam
The plant operates on low-potential heat sources. Low specific steam consumption for desalination is ensured by a developed heat recovery system. Due to this, the plant produces up to 12 tons of desalinated water, operating on 1 ton of steam.
Environmental friendliness
The unit does not require acid washing, disposal of spent chemical reagents and filter elements. Thermal desalination technology is the most environmentally friendly of the entire list of seawater desalination technologies.
Technology diagram
Operating principle of the evaporator stage

Water enters the expansion chamber through the overflow device and boils there in free volume. The resulting steam enters the condensation chamber through the separator, condenses on the surface of the heat exchange tubes and is removed from the system. The remaining concentrate flows into the expansion chamber of the next stage, where it boils at a lower pressure.

The unit allows you to get demineralized, deaerated, heated water for feeding power boilers without the use of chemical reagents with minimal energy consumption.

Equipment
ReinnolC equipment used for desalination
ReinnolC equipment used for desalination
Exerger FVE flash evaporator
A thermal desalination unit producing high quality distillate. Highly efficient and eco-friendly
Green Vessel – concentrate collector unit
Pressure vessels and technological tanks.
Green Tube heater
Efficient shell & tube heat exchanger designed for steam condensation heat transfer to various technological environments
Сравнение технологий
Сравнение термических и мембранных технологий водоподготовки
Сравнение термических и мембранных технологий водоподготовки
Критерий оценки Выпарная установка Exerger WTU Классический выпарной аппарат с принуд. циркул. Обратный осмос Электродиализ
Требования к исходной воде Предварительное реагентное умягчение Требуется Требуется Требуется Требуется
Подогрев исходной воды Не требуется Не требуется Требуется Требуется
Взвешенные вещества, органические примеси, нефтепродукты Допустимо Допустимо Не допустимо Не допустимо
Зависимость от солесодержания Слабая Слабая Сильная Сильная
Продукты технологии Деаэрация очищенной воды
Степень концентрирования макс. (>250г/л) макс. (>250г/л) 20 г/л 60 г/л
Полная утилизация жидких стоков
Получение кристаллических солей заданного качества или их крепких растворов пригодных для повторного использования или продажи
Электропроводность обессоленной воды (без доочистки) 1-10 мкСм/см 20-150 мкСм/см 30-200 мкСм/см 100-600 мкСм/см
Условия эксплуатации Зависимость от теплоносителя Сильная Очень сильная Слабая Слабая
Параметры пара 0,02МПа 0,04МПа 0,02МПа 0,02МПа
Удельный расход пара на 1 м3 стоков, т/м3 0,1-0,18 0,3-1,1 0,02-0,03 0,02-0,03
Удельный расход электроэнергии, кВт*ч/м3 4,5-6 8-30 2-6 10-20
Надежность Высокая Высокая Низкая Низкая
Возможность безреагентной чистки/промывки
Возможность уличного исполнения
Регламентный срок службы оборудования
30 лет
30 лет
15 лет
15 лет
Ремонтопригодность
Наличие сменных, расходных элементов и периодичность их замены в соответствии с регламентам
нет
нет
каждые 2-4 года
каждые 2-4 года
Зависимость от импортных материалов и компонентов Низкая Низкая Высокая Средняя
Application of technology
Applications

Applications

Power engineering. Thermal boilers with pressure of 10-14 MPa

The unit Exerger TDU deaerates, softens, heats and desalinates water obtained from external sources in order to use it later to feed steam boilers

1

Oil refining. Fractionation of oil mixtures

The multicomponent feedstock in the oil refining process is separated by repeated countercurrent mass exchange between steam and liquid. Steam for this process is conveniently obtained from desalinated water

2
Frequently asked questions
Frequently asked questions
Contact us

ReinnolC develops solutions to reduce water consumption and wastewater discharge and ensures that the wastewater discharge quality complies with environmental regulations of any industry

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