On the production of diammonium phosphate

Can your facility already handle 600,000 tons? The equipment isn’t a major issue; the process is the real challenge. The spraying volume is around 80 cubic meters – I’ve never seen such a setup before

Reply to 3# wsk0318 Hey! We currently have a single tube with a capacity of 70 cubic meters; adding more would impose constraints on production, leading to a significant decrease in operation rate and severe accumulation of material in the granulator.

Brother upstairs, you need to go check out Workshop 2 for phosphorus ammonium phosphate – those guys are working on a double-tube reverse process. Hehe.

This post was last edited by swpi001 on 2010-6-18 at 14:22. It’s already quite good that a single-tube system can reach 70 M3, but I personally don’t think it’s necessary. . . Using a single pipe to achieve a reverse flow of 70 M3 already presents significant limitations, but with two pipes for a reverse flow of 80 M3, it is very easy and straightforward to operate. . . Moreover, a pipe needs to be added in reverse inside the granulator. . It’s simply a matter of installing a pipe and adding a pump; in fact, reaching a spraying volume of 80 M3 is not difficult. . Here, with a single-tube reverse + neutralization reactor, it’s no trouble to handle 80 M3 of capacity; the equipment isn’t difficult to use. . Difficult things: breakthroughs in technology. . It can handle 80M3, but not very well

We have also tried running the twin-tube system in reverse before; with two liquid ammonia tubes operated in reverse at a capacity of 60 cubic meters, material accumulation occurred too quickly, and the cleaning cycle was short, making it impossible to meet the production target of 600,000 tons, let alone 80 cubic meters. How do you arrange things when operating at 80 cubic meters over there?

I have a question for the guests upstairs: do you all only use the reverse flow system, without employing a pre-neutralization tank? Is system operation easy to control?

Dual-tube reactors are somewhat more difficult to control than single-tube reactors, as when operating at high loads with dual-tube reactors, it becomes necessary to adjust the particle size, which makes the setup more complicated. However, for larger units, a combination of a pre-neutralization reactor and counter-current tubes yields excellent results. In typical granulators, there are two counter-current tubes plus one pre-neutralization nozzle; during operation, it is possible to use one counter-current tube together with the pre-neutralization nozzle – this combination works very well, and it is also easier to operate than using two counter-current tubes. Counter-current tubes tend to get clogged easily, and when one of them gets blocked, the spare one can be used. Clean this one. This allows for very long driving periods. As for severe scarring, this is also something we encounter frequently; it can be addressed by improving the manufacturing processes and adjusting the angle and position of the tube backflow nozzles.

This post was last edited by swpi001 on 2010-6-21 at 14:21. How are your single-tube backflow preventers and secondary compensators arranged? I mean, how many nozzles does your single-barrel launcher have? How many secondary ammonia compensators are there? Could it be that the uneven distribution of spray from the single-nozzle backflow sprinklers, along with uneven secondary ammonia compensation, is causing the accumulation of aggregates? Personally, I suggest that you actually measure the positions of your backflow nozzles and those of the secondary ammonia compensator nozzles, and then conduct an analysis. If you can send it to me, that would be great too; I also have here the locations of our dual-nozzle sprayers. We can have a chat

Single-tube reverse dual nozzles, with nozzle dimensions of 450*40; the distance between the nozzles is 800, and the distance to the secondary ammonia source is 1100. There are three nozzles in total, with the first one being 2100 units away from the rear retaining ring of the granulator