METHOD AND DEVICE FOR SOLID-LIQUID SEPARATION OF DREDGING SLUDGE

摘要

PURPOSE:To greatly enhance solid-liquid separating performance and to flocculate and remove the vegetable planktons, etc., in lake, pond and sea water by providing mixing pipes between a dispersion chamber and solid-liquid separating basin so as to penetrate the walls of the dispersion chamber and disposing injection pipes into the mixing pipes. CONSTITUTION:A piece or plural pieces of the mixing pipes 4 are provided between the dispersion chamber 2 for the supplied dredging liquid 11 and the solid-liquid separating basin 3 so as to penetrate the walls of the dispersion chamber. The respective mixing pipes 4 are opened at one end into the dispersion chamber 21 and are opened at the other end into the solid-liquid separating basin 3. The injection pipes 5 are inserted into the mixing pipes 4. The flow of the injection liquid 6 injected from the discharge ports of the injection pipes 5 into the mixing pipes 4 and the flow of the dredging liquid 11 admitted into the single pipe parts of the mixing pipes are brought into contact with each other to generate differences in the concn. of the electrolytes between the fine particles at the boundary faces thereof. Vigorous collisions are repeated among the fine particles of 1-5X10-3mm (for example, vegetable planktons) which are difficult to collide against each other by the decrease in the repulsive potential based on the differences. A liquid mixture 7 formed with huge flocs of 0.5-1mm up to the discharge ports of the mixing pipes 4 is sent to the solid-liquid separating basin 3.