| 摘要 |
<p>A unit for cleaning apparatus used in concreting operations comprises :an open-topped receiving hopper(4) for receiving apparatus to be cleaned;a pump for providing a flow of liquid onto apparatus received in the open-topped hopper for washing the apparatus and creating washout;a first tank (18) for receiving the washout from the hopper (4) and separating aggregate from the washwater; a second tank (20) for receiving washwater from the first tank and adjusting the pH of the washwater; a pH reducer (32, 34) associated with the second tank for reducing the pH of the washwaterin the tank, the pH reducer being able to be connected to a source (15) of an agent for reducing the pH and being arranged to supply the pH reducing agent to the washwater in the second tank; a third tank (22) for receiving pH adjusted washwater from the second tank and for separating solids from the pH adjusted washwater; and a fourth tank (24) for receiving and storing cleaned and pH adjusted washwater from the third tank (22).</p> |
