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Negative Pressure Conveying
Negative Pressure Conveying is one of airflow conveying. It takes use of the airflow energy to deliver the granules along the airflow direction inside the closed pipe， which is a specific application of fluidization technology. The Negative Pressure Conveying normally takes Roots vacuum pump as power source to vacuumize the material tank into some vacuum state. Under the atmospheric pressure, two phases flow of material and gas forms at the air inlet, and they enter the cyclonic separator through the pipeline; the two phases flow inside the cyclonic separator under the action of centrifugal force and gravity, most materials are separated from the gas, then enter into the materials tank, a small amount of material go into the dust collector along with gas. Through the filtration bag, the powder is separated from the gas and recycled. And the gas will be discharged to the atmosphere.
The Negative Pressure Conveying normally takes Roots vacuum pump as power source to vacuumize the material tank into some vacuum state, under the atmospheric pressure, two phases flow of material and gas are formed at the air inlet, and they enter the cyclonic separator through the pipeline; the two phases flow inside the cyclonic separator under the action of centrifugal force and gravity, most materials are separated from the gas, then enter into the material tank, a small amount of materials go into the dust collector along with gas. Through the filtration bag, the powder is separated from the gas and recycled. And the gas will be discharged to the atmosphere.
Product Overview
| Conveying Distance | ≤50 Meters |
| Conveying Capacity | ≤6 Tons/Hour |
| Application Industry | Suitable for industries such as Building materials, chemical industry, electric power, metallurgy, coal mining, food, cement and pharmaceuticals etc. (For more application industry, please click “Free Consultation”) |
| Application Materials | Applicable for horizontally or inclinedly conveying powder, granules and small lump materials, such as cement, fly ash, pesticide, titanium dioxide, pigment and grain etc. The material temperature is less than 200 ℃. Pneumatic Conveyor is not suitable for transportation of perishable, highly sticky, or easy to agglomerate materials. |
Work Principle
Negative Pressure Conveying is a conveying method that uses negative pressure difference to transport materials to the target position. Its working principle is to reduce the pressure inside of the conveying pipeline to a negative pressure state by suction, so that the material above the conveying pipeline has a pressure difference, thereby realizing negative pressure conveying of the material.
Suction: A negative pressure is generated at the entrance of the pipeline through a vacuum pump, so that the pressure inside the pipeline is lower than the external pressure.
Material supply: Due to the pressure difference between the inside and outside of the pipeline, the material is sucked into the pipeline.
Airflow push: After the material enters the pipeline, it flows with the high-speed airflow and is pushed by the airflow.
Conveying: Under the action of the airflow, the material is transported to the designated destination.
Separation: The material and the gas are separated during the conveying process, the material is discharged from the discharge outlet, and the gas is discharged through the fan.
Product Advantages
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Airtight conveying, energy-saving and environmentally friendly
Reliable airtight conveying, energy-saving; No dust leakage, no cross contamination; Effectively solve the stratification phenomenon of powder particles.
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Easy to operate and convenient to clean
Easy control and operation; Low operating and maintenance cost; Module design, no dead angle installation, quick and easy cleaning.
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Made of excellent materials that comply with GMP standards
Made of SS304 or SS316L; meet GMP standards. The curved surface sealing method is adopted to effectively reduce the possibility of material leakage. The S-shaped curved surface flange is adopted, which can be quickly installed, disassembled and cleaned.
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Effectively eliminate static electricity generated during material conveying
Titanium sintered filter, advantages: wear resistance, not easy to clog, long service life, can effectively eliminate static electricity of material.
Related Video
Technical Parameter
| Conveyor distance: | Productivity: | Air Consumption: | Air source requirement: | Water removable rate: |
| Horizontal Distance 0-50m,
Vertical distance 0-10m |
0-100kg/min | 0-5m3/min, pressure 63bar (As per the production capacity.
The bigger production capacity, the larger the air consumption.) |
clean and oil-free compressed air,
atmospheric dewpoint -24℃; |
99%, particle size ≤0.3μm,
oil content ≤0.8ppm |
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