Method and device for sampling dispersed streams of material

Apparatus for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section, is defined independently of the same,
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus arranged within the process mainstream being a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow,
• the sampling tube is pivot mounted to allow rotation and tilting in relation to the process pipe axis,
• during the rotary motion, the tube can be deflected by a positively connected push rod, and,
• the tilting motion imparted by the positively connected push rod can be generated, during the rotational movement of the sampling tube, via a threaded nut screwed onto a thread which is permanently fixed to the delivery tube.

Application of an apparatus for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus arranged within the process mainstream, being a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, and
• in a process to determine at least one of particle sizes and particle size distribution in pipes using methods based on at least one of laser diffraction, image processing and ultrasound extinction, with the sampling device, a sample transport system, a measuring zone and a sample return system being arranged within the pipe parallel to the pipe axis, and
• with a partial flow (substream) being removed by the sampling device, which then passes through the apparatus shielded from the remaining process mass flow, and downstream of the sample return system being immediately reunited with the process mass flow.

Apparatus for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same,
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus arranged within the process mainstream being a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, and
• several parking positions are provided on the pipe which are designed to prevent the ingress of particles from the process mainstream.

Apparatus for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same,
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus arranged within the process mainstream being a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, and
• the sampling tube is mounted in two cardan rings in the process pipe and can be deflected by swiveling the cardan rings under time control.

Apparatus for determining at least one of particle sizes and particle size distributions containing a device for sampling disperse material flows for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus being arranged within the process mainstream and a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, wherein
• the sampling device, a sample transport system, a dispersing system, a measuring zone and a sample return stage are arranged within a pipe in the order recited, and
• the sample transport is performed by a jet pump.

Apparatus for determining at least one of particle sizes and particle size distributions containing a device for sampling disperse material flows for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus being arranged within the process mainstream and a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, wherein
• the sampling device, a sample transport system, a dispersing system, a measuring zone and a sample return stage are arranged within a pipe in the order recited, and
• the dispersing operation in liquid systems is performed by an ultrasound probe which is isolated from the process pipe by a layer of air.

Apparatus for determining at least one of particle sizes and particle size distributions containing a device for sampling disperse material flows for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus being arranged within the process mainstream and a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, wherein
• the sampling device, a sample transport system, a dispersing system, a measuring zone and a sample return stage are arranged within a pipe in the order recited, and
• for solid aerosols, a jet ducting tube with a round cross-section is connected to the sampling tube, said cross-section being dimensioned so that it is sufficiently narrow to produce a maximum number of at least one of particle-particle and particle-wall impacts,
• with a transition tube being connected to this in which the cross-section continuously changes in size while changing from a round to a rectangular shape, and a jet ducting tube with a rectangular cross-section is connected to this and which extends to just in front of the measuring zone.

Apparatus for determining at least one of particle sizes and particle size distributions containing a device for sampling disperse material flows for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus being arranged within the process mainstream and a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, wherein
• the sampling device, a sample transport system, a dispersing system, a measuring zone and a sample return stage are arranged within a pipe in the order recited, and
• the dispersion section can be briefly isolated by slewing the same in front of the outlet aperture of a jet pump to enable a reverse flow to be generated within the sampling tube in order to remove blockages.

Apparatus for determining at least one of particle sizes and particle size distributions containing a device for sampling disperse material flows for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus being arranged within the process mainstream and a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, wherein
• the sampling device, a sample transport system, a dispersing system, a measuring zone and a sample return stage are arranged within a pipe in the order recited, and
• the return feed of the analysis substream is performed via a jacket tube immediately downstream of the measuring zone in the direction of the pipe axis.

Apparatus for determining at least one of particle sizes and particle size distributions containing a device for sampling disperse material flows for performing a process for sampling disperse material flows in which an analysis substream is removed from a process mainstream for subsequent analysis, wherein

• the analysis substream is taken from the process mainstream via an extraction area which is smaller than the process mainstream cross-section and is defined independently of the same, and
• the extraction area follows an orbital curve across the process mainstream cross-section during extraction of the analysis substream,
• said apparatus being arranged within the process mainstream and a traversible sampling tube aligned in the direction opposite to the direction of the disperse material flow, wherein
• the sampling device, a sample transport system, a dispersing system, a measuring zone and a sample return stage are arranged within a pipe in the order recited, and
• a jet pump is arranged downstream of the measuring zone, by means of which the velocity of the particles to be measured in the measuring zone is increased such that the particles are located at the center of the measuring zone and thus contribute to the suppression of contamination of the measuring windows.