Dust aerosol generator

1、 Instrument description:

Huifen 7990 is a universal dry powder aerosol diffuser widely used in aerosol and powder science, industrial processes, and quality control. The diffusion technology of dry powder and dust includes two steps: continuous feeding to the diffuser; Spread the powder into aerosols. One method of quantitatively conveying powder to the diffuser is to use a transmission roller belt. The carefully designed tooth spacing can continuously and stably transport powder even at low feed rates. By adjusting the speed of the feeding belt, it is easy to adjust the concentration of aerosol output over a wide range. When powder is output from a nozzle (similar to the type in DIN ISO 5011), the shear force formed at the nozzle mouth disperses the agglomerated powder particles, thereby forming aerosol particles. A dedicated scraper device can ensure balanced packing between the teeth, thereby minimizing the impact of the amount of powder in the storage tank on the aerosol mass flow rate.

2、 Instrument operation and characteristics:

Can continuously and stably supply materials within a wide range

Both material replacement and cleaning are very convenient

High precision, basically unaffected by the amount of dust in the storage tank

The refilling during equipment operation will not affect the aerosol mass concentration - an ideal choice for long-term research.

Even at low flow rates, high concentrations can still be achieved, which can accelerate application research under low flow conditions.

The diffusion head can be replaced, so the output range of one device can be continuously adjusted within 1-6000 g/h

Both manual and microcomputer remote control units are used

3、 Instrument application:

Filter efficiency measurement; Basic aerosol research

Inhalation toxicity study; Optimization of combustion process

Flow field display, LDV and LIV applications

Mixing and spraying operations; Calibration, calculation, and operation of dust samplers and monitors

4、 Instrument specifications and parameters:

Particle type: Non viscous dry powder

Continuous operation time: 1-50 hours

Compressed air requirement: maximum 6 bar

Capacity of powder storage tank:

320cm3(7990/L)、 320cm3(7990) 、 1420cm3(7990/H)、1420cm3(7990/U)

Dust feeding flow rate:

5～278cm3/h (7990/L)、10～557cm3/h (7990)、120～6487cm3/h (7990/H)

Dust mass flow rate:

1～264g/h (7990/L)、9.5～529g/h (7990)、114～6162g/h (7990/H)、0.05...20g/h(7990/U)

Aerosol volumetric flow rate:

0.5～2.5m3/h (7990/L)、0.5～2.5m3/h (7990)、5～20m3/h (7990/H)、1.5～4m3/h (7990/U）

Aerosol outlet concentration:

1～264g/m3 (7990/L)、1.9～529g/m3 (7990/L)、5.7～1232g/m3 (7990/L)

Power requirements: 100-260VAC/47-63Hz

Instrument size: D 320 x W 400 x H 320mm

Instrument weight: 12 kg