Descripción del producto

Ultrasonic on-line particle size monitor technical specification:

(1) Basic function
Online, real-time simultaneous measurement of slurry particle size, size distribution, and pulp density

(2)Measurement method
Multi-frequency ultrasonic attenuation

(3)Measurement range
Size measurement: the largest particle is not more than 1mm,P80 is for the 295 to 25 micron distribution
Density measurement: percentage density of pulp weight is 4~60%.

(4)Precision
Particle size measurement precision: absolute error is less than 1.0ï¼…(1σ);
Density detection precision: absolute error is less than 1.0%(1σ);

(5)Multi-flow channel applications
Sample channels: 1~3.
Measurement cycle: automatic, automatically cycles according to user-defined sequence
Manual, select the measurement from the front panel;
Remote control, DCS control system computer on-site can choose 1, 2, 3 flow channel through a signal switch connected to the particle size monitor
Flow channel measurement cycle: each flow channel is 1 to 255 minutes (user-selectable); the typical system cycle time for 2 or 3 flow channel is 180-300 second.

(6)Reading refresh time
The minimum interval is less than 1 second

(7)Measurement data output
Each channel provides a density analysis value, following the user habits, scaled by weight or volume percentage

(8)Control and display
Control switch and keyboard
On/Off power key switch
Measurement start/stop
Flow channel select (with indicator) (flow channel 1,2,3)
Thin film keyboard is used to select menu functions: selective display, flow channel setting, status, help;
numeric keyboard: number 0 to 9,一,decimal point; special function keys F1 to F4;edit key esc, enter; direction key(up, down, left and right)
Display:
Status LED: AC power supply, CPU power supply, CPU running, buzzer, remote control;
10.4”with backlit color LCD screen: multiple screen display size and density measurement result, measure intermediate parameter, instrument working status, alarm event, historical data and trend curve.

(9)Calibration method
Particle size and density analysis results(density analysis: dry weighting method; particle size analysis：sieving method) for calibration samples in laboratory are calibrated with attenuation parameters measured by instruments

(10)Correction method
Programmable cycle of automatic standard water measurement provides accurate zero tracking for ultrasonic attenuation measurement, which can make the instrument automatically correct electronic single drift and measurement drift caused by ultrasonic transducer surface deposition; pulp temperature measurement can be used for temperature correction. The above measures ensure high accuracy and long-term stability of density and particle size measurement.

(11)Data connection
Connect the DCS control system through the following ways:
4--20m A electrical isolation simulation current loop(each flow channels 4 ways,12 bit resolution, can be used to transmit density measurement values and three size fraction),connects to the DCS control system through a coated twisted pair instrument cable; the longest is up to 1000 meters. Along with 4-20m a simulation current loop signal for each flow channel, provides a pair of switch signals (one out, one in) as the simple contact signal between the DCS system and the particle size monitor ,the signal can be used as an effective instruction for showing the flow channel measurement data.
RS-485 serial links---particle size, alarm. It supports Modbus RTU protocol point to point connection.

(12)Normal working environment:
Environment temperature: －10 to ＋50℃;
Relative humidity: maximum of 98%, non-condensing
Vibration: at 20Hz,no more than 10g

(13)Materials and protection grade
All wet parts are engineering polymers or stainless steel.
Electronic components shell and any exposed electrical components are IP66

(14)Dimension, weight

(15)Installation
Installation requires a level base space of 2.25 square meters, and can support the weight of 500kg.

(16)Pulp characteristics
Corrosive slurry: pH is up to 12.5
Sampling flow:32~75 liters per minute(2.0-4.5 m3/h);
Pulp temperature: 0~50℃;
Pulp density: weight percentage concentration 4~60%;
Dry mineral density: 2.0~5.5g/cm3;
Maximum particle: when the dry mineral density is 2.7g/cm3,the particle diameter accumulated on the screen is no more than 2.3mm;when the dry mineral density is 5.1g /cm3,the particle diameter accumulated on the screen is no more than 1.2mm;

(17)Instrument working conditions

Power supply: 198 to 230 VAC; 50/60 Hz; turn off water heater 0.1kVA, open water heater 0.8kVA

190 to 575 VAC; 50/60 Hz; 3 phase; 3.8kW

Ordinary water: general industrial water standards, 45 liters minute, pressuree 275-550kPa.

Standard water: drinking standards, about 12 liters/minute

Instrument air: clean and dry instrument air 303 liters/minute, pressure 690kPa.