BT-Online1

BT-Online1—Online Measurement for Dry Powder

The BT-Online1 is used as an online particle size analyzer for dry particles within the size range of 0.1 to 1000 μm. The BT-Online1 is integrated into a process loop, providing real-time measurement results that assist in quality inspection and parameter monitoring.

 

 

Representative sampling with two samplers 

 

1. Straight flute

• Suitable for the sample with wide particle size distribution 
• Good representative
• Simple maintenance

2. Sample auger

• Suitable for thin material flow
• Threaded rod ensures effective extraction

 

 

Dual protection from contamination 

The lenses of the BT-Online1 are protected using a dual air curtain and sheath gas, which greatly reduce maintenance costs, increase efficiency, and prevent costly downtime.

 

1. Dual air curtain

• Protection of lenses from contamination based on the two generated positive pressure zones
• Assistance in sample dispersion

2. Sheath gas

• Hydrodynamic focusing of the sample jet ensures the correct flowing path for the particles
• Protection of lenses from pollution using an annular curtain

 

 

Monitoring of up to 4 process lines 

The BT-Online1 can monitor up to 4 process lines, in which corresponding samplers are connected to the BT-Online1, and the samples are measured individually. This design is characterized by investment saving, space efficiency, and simplified data management.

 

 

Automatic alignment 

Automatic alignment will be carried out, ensuring accuracy for every measurement in case of harsh working environment.

 

 

Intuitive software 

Individual SOP for each process line can be configured, and monitoring curves are intuitively displayed in the software.

 

 

Multiple communication protocols 

The BT-Online1 can cooperate with the DCS or PLC system of the plant. Available communication protocols are TCP, Modbus RTU, and 4 - 20 mA.

 

Application    

 

 

• Measurement of cement powder in air gravity conveyor 

By changing the rotation speed of the classifier, the particle sizes of the cement particles measured with the BT-Online1 vary

 

 

• Various application of the BT-Online1 in a cement plant 

A general portland cement production line is demonstrated below. The BT-Online1 can be applied in different positions for different purposes. Examples are shown below:

 

• Further applications of the BT-Online1 

 

 

1. Real-time Control System
As well as being able to continuously monitor particle size, the system also has a function for real-time feedback and control. The system will collect real-time size data and perform calculations against the particle size control limits. It automatically generates the feedback signal to the control center. This closed loop feedback control system will achieve better quality improvement, higher efficiency, reduce wastage and save energy.

2. Automatic Centering Guarantees perfect conditions of the optical system By moving the laser detector center point to the focus point of the lens before each test, the automatic centering function guarantees perfect conditions of the optical system, therefore providing accurate and repeatable testing results.		3. Accuracy Calibration Maintain accurate datum lifetime This function maintains operating parameters at consistent conditions, producing consistent and reproducible measurement across the board for all instruments, old and new

4. Reliable Sampling System
Sample dispersion is achieved by accelerating the powder through a venturi. The "backflush" and tapered pipe design prevents blockage of the sampling tube, and keeps the residual powder clean, ensuring the accuracy and continuity of real-time testing.

Three different dispersion mechanisms can act upon the sample

5. Versatile Functionality of the System The system has power interruption protection and over-pressured protection functions. Under these abnormal operating conditions, it will initiate an automatic shutdown sequence to protect the system from harm. The electrical and mechanical system of the BT-online1 has robust interference protections; it is ready for the haphazard nature of a production environment and an electromagnetic interference prone environment.

6. Contamination Prevention Optics System Using the controlled principle of aerodynamics, we devised the double air-cushion lens protection system. The contamination prevention technology will form an invisible double air shield between the sample stream and the lens, eliminating the optics from contamination from sampling, as well as a dust-prone environment. With this technology, the ultimate goal of a long duration of sustainable operation, providing real-time, continuous particle size monitoring and control can be realized. Accuracy and continuous monitoring of the production data can be achieved.

Laser Diffraction

BT-Online 1
Parameters	Values
Measurement range	0.1 - 1000 μm
Measurement principle	Mie scattering theory and Fraunhofer diffraction theory
Accuracy	≤ 1% (D50 of certified reference material)
Lens protection	Dual air curtain
Pressure of carrier gas	0.4 - 0.8 MPa
Airflow volume	≥ 1000 L/min
Laser power	Semiconductor laser
Number of detector	68
Carrier gas	Compressed air/inert gas
Communication protocol	TCP, Modbus RTU, 4 - 20 mA
Protection	IP65
Sample required per measurement	2 - 20 g
Power	AC220 V, 50 / 60 Hz, 90 W
Dimension	800 (L) x 280 (W) x 280 (H) mm (Main unit)
Weight	21 kg (Main unit)