What kind of vacuum feeding equipment or pneumatic material conveying equipment should be chosen
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I have a material with a bulk density of around 1.4, a conveying capacity of 3 T/H, a conveying height of 10–15 meters, and a conveying distance of 40–50 meters before it reaches the silo. This material needs to be treated as a pharmaceutical-grade material, and it must not become contaminated during the conveying process. What type of conveying equipment would be suitable?
As you requested, vacuum conveying is not suitable.
What delivery method to use? 2# What are your insights?
LZ, is the material you’re talking about the one from your other post? http://bbs.hcbbs.com/viewthread.php?tid=600996&highlight=%CA%E4%CB%CD I also answered about it in that post. Let me say it again here: as long as it is possible to enter the sending tank smoothly, pulse plug flow can be used for delivery.
It’s similar to that material; it has low moisture content, has been dried, and is ready to be sent to the finished goods warehouse for packaging
Three solutions are provided: 1. Using a stainless steel screw conveyor should work. 2. A pneumatic transfer pump can also be used. 3. Stainless steel chain conveyor.
Have you ever used a Roots blower with a Venturi pump system? I don’t know if it works well
It doesn’t work well; the speed at the throat is extremely high, which easily causes degradation of your material. Moreover, such devices have high energy consumption
9th floor – what good equipment could be used to replace it?
As I mentioned earlier, the best approach is to send pulsed plug flows in tanks; this method results in a low transfer speed, which helps to minimize material degradation. When using a sending tank, ideal conveying can be achieved by properly controlling the air volume at the end of the conveying cycle. The problem with feed tanks is their high installation height; if continuous feeding is required, an intermediate tank must be added, or two feed tanks connected in series/parallel, which further increases the height and also requires compressed air. Secondly, a rotary valve combined with a Roots blower is used; based on your description, the dense-phase conveying capacity for this type of material is not very good, and since the conveying distance is not short either, it’s unlikely to achieve a high solid-to-gas ratio in transportation, which means that the gas flow velocity will be relatively high. However, this conveying method is a continuous conveyance, and the installation height is relatively low. There is also spiral feed conveying, similar to a plunger pump. However, requiring the material to be compressed in order to achieve an air seal can also cause the particles to break. As mentioned for the venturi tube, the velocity at the throat is extremely high, reaching several dozen or even over 100 m/s, resulting in significant wear. Moreover, the venturi pressure drop is high, essentially equal to the pressure drop in the pipeline (+ dust collector). Suitable only for short-distance transportation of powders and fine particles that have no grinding properties and are not prone to breaking. Similarly, due to the inherent limitations of vacuum levels, a very high mixing ratio cannot be achieved; moreover, the gas transport velocity is generally higher than that in positive-pressure transportation with the same solid-to-gas ratio.
We specialize in this type of transportation. I think there are three methods: 1. Negative-pressure transportation; 2. Positive-pressure pneumatic transportation, including 2.1 Low-pressure pneumatic transportation using rotary blowers, and 2.2 High-pressure pneumatic transportation using compressors. Given that the volume is small and the distance is short, I believe using a low-pressure pneumatic continuous transport pump would be a good option – it requires less investment and ensures complete sealing. For more information on related technologies, please contact me on QQ at 1085827423