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US 2003/0141029 A1Published application
Method and a device for measuring concentrations
AssigneeBTG Kalle Inventing AB
InventorsGerdt Fladda, Jonny Weng
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AssigneeBTG Kalle Inventing AB
InventorsGerdt Fladda, Jonny Weng
Estimating the term…
The invention relates to a method and a device for measuring concentrations especially in a pulp suspension, from which a sample (3) has been taken. The sample (3) is collected in a measuring vessel (2), in which a piston (6) is guided upwards and downwards in order to press the sample (3) from each direction through a measuring sensor (5) connected at the side of the measuring vessel via communicating tubes (4,4′) connected in an upper and an lower position to the measurement vessel (2), whereby the sample (3) is stirred totally for eliminating of a flocculation in the same, whereupon a measurement of the concentration of the sample (3) is made either during the movement upwards or downwards of the piston (6) in the measuring vessel (2) and first when the speed of the sample (3) through the measuring sensor (5) is constant and the sample has been homogenized at least after some movement upwards and downwards of the piston. The device consists of a sample treatment unit (1), in which communicating tubes (4,4′) connect the upper (10) and lower (10′) portion of a measuring sensor (5), in said measuring vessel a piston (6) is guidable upwards and downwards to press the sample (3) through the measuring sensor (5) from each direction and said diameter of said piston (6) mainly corresponds to the inner contour of the measuring vessel (2), the flow rate of the sample being controllable via the speed of the piston and the measurement of the concentration of the sample is practicable both during the movement upwards and downwards of the piston (6).
A method for measuring concentration especially in a pulp suspension, from which a sample has been taken, characterized in that the sample (3) is collected in a measuring vessel (2), in which a piston (6) is guided upwards and downwards in order to press said sample (3) from each direction through a measuring sensor (5) connected at the side of the measuring vessel via communicating tubes (4,4′) connected in an upper and lower position to the measuring vessel (2), whereby the sample (3) is stirred totally for eliminating of a flocculation in the same, whereupon a measurement of the concentration of the sample (3) is made either during the movement upwards or downwards of the piston (6) in the measuring vessel (2) and only when the speed of the sample (3) through the measuring sensor (5) is constant and the sample (3) has been homogenized at least after some movement upwards and downwards of the piston.
A method according to cloaim 1, characterized in that the sample (3) in actual cases is diluted with clean water from a vessel (11) which is provided in parallel with the measuring vessel (2) and communicates via valves (12,13).
A device for measuring concentrations especially in a pulp suspension, from which a sample (3) has been taken and including a measuring vessel (2) for collecting the same, characterized in that the measuring vessel (2) is included in a sample treatment unit (1), which via communicating tubes (4,4′) connect the upper (10) and lower portion (10′) of the measuring vessel to a measuring sensor (5), in which a piston (6) is guidable upwards and downwards in order to press the sample (3) through the measuring sensor (5) from each direction and said diameter of said piston (6) mainly corresponds to the inner contour of the measuring vessel (2), the flow rate of the sample (3) being controllable via the speed of the piston (6) and the measurement of the concentration of the sample is practicable both during the movement upwards and downwards of the piston (6), said measurement is taking place not until the speed of the sample (3) through the measuring sensor (5) is constant and has been homogenized.
Dependencies are inferred from the claim text.