Questions regarding the wind transportation of rice husks
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Dear experts: I am planning a project in which rice husks will be used as fuel for the boiler. The rice husks come from the river, and we want to use fans to suck them directly from the ships into the silos. The distance from the ship to the silo is approximately 30 meters horizontally, and the height of the silo is about 25 meters. The designed wind conveying capacity for rice husks is 6 tons of rice husks per hour. Which expert can offer guidance on how to determine the appropriate selection? ?
To an outsider, dry rice husks and wet rice husks seem very different from each other.
The poster’s planning proposal is debatable. 1. First of all, this is a biomass fuel boiler. Since it uses biomass fuel, the fuel does not have to be rice husks exclusively; any type of biomass that can be burned can be used as fuel. Moreover, how much rice husk can you collect from nature? 2. Even if you collect hundreds of tons of rice husks, by ship? How big will this ship be? Should it be dry rice husks or wet rice husks? Can the shipping cost be afforded? 3. “Use a fan to suck the rice husks directly from the ship into the silo.” The distance from the ship to the silo is approximately 30 meters horizontally, and the height of the silo is about 25 meters. The designed wind conveying capacity for rice husks is 6 tons of rice husks per hour. “----Isn’t this a giant vacuum cleaner? Regardless of whether it’s dry or wet rice husks, 6 tons per hour – how large is the volume of 6 tons of rice husks? Take wood as an example: its density is around 500 KG/m3. Even if the density of rice husks is 25% that of wood, in a compact state, one ton of rice husks occupies 8 m3; taking up space as well, one ton of rice husks requires more than 20 m3. So how large does the silo need to be? 4. How many steam tons per hour does your furnace produce? How many tons of rice husks are burned per day? Conclusion: Therefore, your plan is completely unrealistic; it’s impossible to make a selection! !
It’s dried rice husks! As fuel for boilers, wet rice husks cannot be used.
We measured the specific gravity of dried rice husks in our laboratory using beakers; the weight of each cubic meter of rice husks is 120 Kg. Therefore, the bulk volume of 1 ton of dry rice husks is about 8.3 cubic meters.
We understand this; it’s what’s meant by “dry kindling and fierce fire”. The question is: can you ensure that the rice husks remain dry during storage and shipping? If there is moisture, do you need to add a drying system before entering the silo? The investment in your plan keeps increasing.
The bulk density of rice husks needs to be determined with high accuracy in order to make the right selection; not only horizontal and vertical distances play a role, but the number of bends also has a significant impact on the selection process. Our company specializes in pneumatic conveying – feel free to get in touch with us
Preliminary consideration: Use a centrifugal fan to extract air, creating a negative pressure delivery system. The rice husks are drawn from the ship to the vicinity of the silo; after being separated by a cyclone separator and an air lock, they fall into a hopper, from where they are lifted to the upper part of the silo using a conveyor. There’s no data, so I first searched for some information online. The minimum lifting wind speed for rice husks is 18 m/s.
Rice husks are not valuable in themselves; the cost lies in collecting them. After all this trouble you’ve caused, I guess rice husks that make it into the boiler are even more valuable than rice itself.
Rice husks are not valuable, which is why they are used as fuel for boilers!
There’s no need to rush ------------------------------- There are costs associated with collecting it. In the past, rice husks were mostly burned on the spot or buried; however, environmental pressures are increasing. The areas along the Yangtze River and in the two lakes regions are the main producers and processing sites for rice, and now there are large rice mills there, making it easier to collect rice husks. The poster mentioned the issue of water transportation; the cost of transporting goods by water is at least 70% lower than that of road transport, which is also an advantage. Centralized processing allows for power generation as well as the proper treatment of exhaust gases. Could the ashes resulting from rice husks be utilized in some way? --------------------------------------------------- In summary, rice husk power generation still has advantages in the Yangtze River basin