| 摘要 |
PCT No. PCT/SE95/00851 Sec. 371 Date Feb. 2, 1996 Sec. 102(e) Date Feb. 2, 1996 PCT Filed Jul. 12, 1995 PCT Pub. No. WO96/02709 PCT Pub. Date Feb. 1, 1996A cassette device is disclosed for contribution of neutralizing material into, for example, a surface water flow. The cassette is then intended to be inserted into existing surface water ducts or wells, and comprises an outer, circular, slightly conical wall (2) and an inner circular wall (1) forming a space (5) between the outer and inner circular walls. The space 5 is to be filled with neutralizing material like lime, crushed lime-stone and/or crushed dolomite and/or the like. The cassette is further provided with refill openings (3) to form an exchangeable reusable cassette. Additionally the cassette exhibits inlet orifices (7a) at the inner stepped wall (1) which lead into the space (5), while an outlet from the space (5) takes place through holes (7b) at a bottom rim or ring between the outer and inner walls, whereby the device additionally has a large central opening to handle large flows of fluid. |
