| 摘要 |
Apparatus for measuring dispersability of granular solid sample in water, includes a supply vessel (300) for the sample, a filter (320), pump and flowmeter, all connected by a circuit for fluid flow. The filter lies downstream of the supply vessel, with respect to the direction of pumped flow. Apparatus for measuring dispersability of granular solid sample in water, includes a supply vessel for the sample, a filter, pump and flowmeter, all connected by a circuit for fluid flow. The filter lies downstream of the supply vessel, with respect to the direction of pumped flow. The supply vessel has a circular cylindrical cross section terminating conically below, with a tangential supply and central drain. Its double-wall carries a cooling fluid and has an overflow. The filter body is transparent plastic. The filter fabric is preferably 5-10 mm in diameter and its mesh aperture is preferably 150-500 microm. A storage vessel for the fluid, fills the supply vessel and it has a thermostat maintaining a fluid temperature of 5-30 degreesC. The fluid circuit has an outlet. A sample supply unit is included, which has a transfer unit and sample containers (disposable dishes) in a storage unit , e.g. a rack. The latter is moved by a linear drive. The transfer unit has a rotary drive, pneumatic cylinder and grip. A cleaning unit is included for the supply vessel and filter element. The cleaning unit has a nozzle moved linearly by a pneumatic cylinder and a water valve controlling the supply of cleaning fluid. Further pneumatic valves control fluid flow in the circuit and to the drain. The sample to be measured is a solid, preferably granules. The fluid is water. An Independent claim is included for the method of measuring dispersion over time, of a sample in a fluid using the apparatus. It can also be used to detect hard grains in a dispersion, individually or in the same run.
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