Сортировочная и отмывочная установка для переработки бетона
Сортировочная и отмывочная установка для переработки бетона
На сортировочной установке отсеивается и вновь возвращается в процесс материал избыточной крупности, т.е. крупнее 45 мм. Чтобы не перегружать промывочную установку «Aqumator», осуществляется разделение вторичного заполнителя на фракции 0-8 и 8-45 мм, причем последняя фракция идет на отмывку, где происходит удаление всех компонентов, отрицательно влияющих на последующее использование материала. «Aqumator» был разработан в ФРГ и успешно используется на предприятиях по производству гравия и в каменоломнях. С его помощью осуществляется отмывка вредных примесей щепы, угля, ископаемых примесей, тростника, корневищ, мягких и газосодержащих пород, более легких по массе, чем регенерируемый . Отмываемая фракция бетона подается по желобу на поперечно-лотковую конвейерную ленту с гибкими волнистыми наружными кромками. На установке формируются два разнонаправленных потока с образованием пленок:
- один поток в направлении движения транспортируемого материала по отношению к «Aqumator» за счет силы трения ленты. Изменения осуществляются путем регулирования скорости и угла разгрузки
- другой поток навстречу движению ленты потоком жидкости. Изменения осуществляются путем регулирования высоты и скорости тока жидкости.
Образование жидкостной ванны в зоне лотка в сочетании с регулировкой наклона стока на конце ленты обеспечивает разделение материала по плотности: в направлении транспортировки потоком выносятся тяжелые частицы (крупность гравия или мелкого щебня); по направлению к концу ленты в потоке жидкости отсортировываются легкие частицы. После очистки вторичный заполнитель 0-45 мм отсыпается в отвал. При необходимости полученный материал фракционируется.
Система водоочистки для оборудования переработки бетона
Сердцевиной установки по переработке вторичного строительного бетона является система водоочистки. Для промывки материала и удаления органики требуется 150 м3/ч. Через приемный бассейн вместимостью 25 м3 вода закачивается в постоянную систему циркуляции. Содержимое бассейна в течение часа оборачивается 6 раз, потребность в добавке свежей воды составляет 2 м3. Отработанная вода с помощью футерованного насоса закачивается в циклон. При этом тонкие пески (крупные 0,05 мм) разгружаются и возвращаются в поток. Вода обогащается на 35% шламами и превращается, таким образом, в тяжелую суспензию плотностью до 1,4 т/м3. Так как оборотная вода подается в малый приемный бассейн с высоты 5 м, образуется мощное поле турбуленции. Тонкие субстанции бетона не успевают осаждаться и сразу же возвращаются в цикл мокрого обогащения. По истечении около 40 ч достигается максимальная степень насыщения. К этому моменту вода отводится в осадительно-успокоительный бассейн, из которого спустя несколько дней удаляется шламовый осадок (около 10-12 м3 в неделю).
См. также:
- Технология переработки бетона на современном оборудовании
- Западный опыт переработки бетона
- Вода на улицах Венеции.
- Установка и настройка DataLife Engine [2009] (инструкция)
- Стеклянная бутылка — Thermo Bottle
- LG Skinny Frame – красивые, но весьма дорогие плазменные HDTV
- Значение материалов в строительстве
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