摘要:
A method and apparatus for treating alkaline water comprises the steps of introducing water into a first compartment 1, bubbling carbon dioxide into the water in the first compartment 1 which causes solids to precipitate, transferring the water with the precipitate into a second compartment 2 in which the precipitate is separated from the water, then transferring the water into a third compartment 3 where carbon dioxide is bubbled into the water to reduce the pH of the water, and finally removing the treated water from the third compartment (3). The pH of the water removed from the third compartment 3 is lower than the pH of the water in the second compartment 2. The compartments are provided in a single portable unit. The first compartment 1 and third compartment 3 include sparging arrangements 6, 26 to supply the carbon dioxide. The second compartment 2 comprises inclined plates (fig 1:18) to aid solid separation by slowing the flow of the water.
摘要:
A method of neutralising washout from concreting operations comprises the steps of : providing a unit (10) to contain the washout, providing the unit (10) with a store of a neutralising agent (44, 45), receiving the washout in the unit (10), and transferring a washwater component from the washout receiving region (21) of the unit (10) to a washwater containment region (14) of the unit (10), and supplying the neutralising agent to the washout in the washwater containment region (14) of the unit (10).
摘要:
A portable apparatus for reclaiming material includes a container, a perforated platform (2) at one end of the container for receiving material, a first conveyor device (12) below the platform (2) for conveying solid material in a direction towards a first end of a trommel (3) mounted for rotation in the container about an approximately horizontal axis, the trommel (3) having a perforated cylindrical wall with formations (6) on the interior thereof for feeding relatively coarse solid material from the first end of the trommel to the second end, and with formations (7) on the exterior thereof for feeding relatively finer solid material from the first end of the trommel to the second end, and a second conveyor device (15) for raising solid material arriving at the second end of the trommel to a level above the platform and above the axis of rotation of the trommel.
摘要:
A method and apparatus for treating alkaline water comprises the steps of introducing water into a first compartment 1, bubbling carbon dioxide into the water in the first compartment 1 which causes solids to precipitate, transferring the water with the precipitate into a second compartment 2 in which the precipitate is separated from the water, then transferring the water into a third compartment 3 where carbon dioxide is bubbled into the water to reduce the pH of the water, and finally removing the treated water from the third compartment (3). The pH of the water removed from the third compartment 3 is lower than the pH of the water in the second compartment 2. The compartments are provided in a single portable unit. The first compartment 1 and third compartment 3 include sparging arrangements 6, 26 to supply the carbon dioxide. The second compartment 2 comprises inclined plates (fig 1:18) to aid solid separation by slowing the flow of the water.
摘要:
A tank for separating solids from a suspension of solids in a liquid, comprises an upper region containing a multiplicity of inclined plates 9 and a lower region for collecting solids settling from the upper region. The tank lower region has a sloping bottom 3 and the tank also includes an inlet 16 for introducing a suspension into the tank, a liquid outlet 19 and a plurality of solids outlets 22 at different fixed positions at the bottom of the tank for removing separated solids. Preferably the liquid entering the tank through the inlet is effluent treated to precipitate the solids as flocs which settle on the plates and then slide into the lower region of the tank. A suction pump may be connected to each of the solids outlets and used at intervals to remove solids collected in the vicinity of the solids outlet. Advantageously the tank is a mobile unit and includes lifting devices 20, 21 to enable the tank to be lifted by a fork-lift truck or a crane.
摘要:
Method and apparatus for treating alkaline water containing solids An apparatus and method of treating alkaline water employs a neutralisation unit (3), including a store (15) of neutralising agent. A first container (1) receives alkaline water to be treated and a second container (2) receives alkaline water from the first container (1). Neutralising agent is fed from the store (15) into the second container (2) to reduce the pH of the alkaline water fed to the second container (2) from the first container (1). The first and second containers (1,2) and the neutralisation unit (3) are separate portable units.