Regarding powder conveying, powder silos, and continuous metering
Thread Content
Currently, the material used in production is a powder containing some moisture; it has to be manually fed into the pulping tank and then water added, which requires a lot of labor. The work area becomes messy, and continuous production cannot be achieved. Now consider connecting an automatic solid-liquid mixer that takes in both powder and water at the same time and discharges them simultaneously; the challenge here is the continuous metering of the powdered material. The powder is packaged in ton bags, and it can clump together due to compression during transportation. How can the contents of these ton bags be unloaded efficiently, and how can the powdered material be added in a continuous, measured manner? Those who have knowledge in this area or are involved in powder conveying, metering, and silo operations can message me privately; please leave your contact information. Thank you!
Powder transportation can be achieved using a screw conveyor (commonly known as a auger), with a small crusher installed at the feed inlet.
We are also considering this, but if the Jiaolong is made too small, won’t the material bin end up empty?
For equipment used to transport powder, if the dry material can be conveyed using a screw conveyor with a mass flow meter for weighing, then it may be suitable to use a screw conveyor if the powder contains some moisture or forms clumps (as screws can get clogged); in such cases, a scraper conveyor is generally a better choice. However, materials that tend to clump together are not suitable for measurement using mass flow meters; instead, methods such as belt weighers used in mines are commonly employed.
If there is concern about bridge formation in the silo, it is possible to install pneumatic or electric vibrators in the silo – what is commonly referred to as air hammers
Share some application experience. After the powder is unpacked, it is poured into a hopper, which is equipped with weighing equipment that continuously monitors the \"decrease in weight\"; the so-called \"loss-in-weight scale\" measures the flow rate of the powder. The screw feeder is driven by a motor with variable frequency control, and it also has a \"gravity loss controller\" that allows you to set the feeding speed; the controller adjusts the motor’s rotation speed based on the actual flow rate of the powder. There are suppliers of complete sets of equipment to achieve such \"continuous powder feeding\". Labor is still needed, for example, to load tons of bags onto the conveyor belt and for the bag-breaking position. (The ton bags are a bit large, making them difficult to handle.)
Shaking might not work! I think it’s because this product contains a small amount of water, and shaking it makes the product stickier, which makes it more difficult to remove it. That’s what I think!
This one is the same as the one used in our other workshop at the moment, but that control parameter refers to the total amount added at once, with no time limit. What I need here is the feeding rate; moreover, the material tends to form bridges more easily, and the clumps formed during transportation can block the discharge outlet. Does this type of weight measurement based on loss of gravity require two silos to be used in a continuous process? I saw a device with broken bridge target teeth yesterday, used in power plants; I’ll take another look to see if it works
As you just mentioned, it’s possible to add a rake inside the silo; what I referred to as a vibrator is something that strikes the outside of the silo wall, and it can be set to vibrate once every few minutes. It can be used to give a shock to the silo at the beginning, when a bridge-like structure first starts to form. It’s guaranteed to work. I’m not sure what the moisture content of your material is; a normal level of around 10% is fine. You might consider using a combination of raking and vibrating to handle materials with a higher moisture content.
It only has a weighing scale for light configuration but no \"weight loss controller\", so it can only achieve total amount control. The weight loss controller can read the “change in weight” = instantaneous flow rate = feeding speed, and continuous control of the feeding speed can be achieved through an inverter. I guess you don’t have a gravity loss controller here; it operates in a semi-automatic batch feeding mode (with total amount control). No more material will be added when delivering, right? There is a storage hopper above, a feeding hopper below, and a plug valve in the middle that can regulate the discharge flow. \"Discharging\" and \"feeding externally\" are carried out simultaneously, enabling continuous feeding and discharge.
It only has a weighing scale for light configuration but no \"weight loss controller\", so it can only achieve total amount control. The weight loss controller can read the “change in weight” = instantaneous flow rate = feeding speed, and continuous control of the feeding speed can be achieved through an inverter. I guess you don’t have a gravity loss controller here; it operates in a semi-automatic batch feeding mode (with total amount control). No more material will be added when delivering, right? There is a storage hopper above, a feeding hopper below, and a plug valve in the middle that can regulate the discharge flow. \"Discharging\" and \"feeding externally\" are carried out simultaneously, enabling continuous feeding and discharge.