Urea plus formaldehyde
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I saw earlier discussions about adding formaldehyde to urea. May I ask what tonnage of urea per year is suitable for adding formaldehyde to? Some users have suggested adding formaldehyde to the U-tube between section 1 and section 2; at which point should it be added so as not to affect the material flow? (What about the V-shaped one?) Which point is a good choice to add the 3 points to? ) And could adding an appropriate amount of formaldehyde help reduce dust to some extent? (Are there any specific figures?) ）
In fact, the addition of formaldehyde to urea has nothing to do with the production load or capacity of the urea plant; in other words, formaldehyde can be added to urea plants of any scale. However, it is generally the manufacturers that produce large particles who add formaldehyde. It is understood that in order to reduce dust levels and increase particle strength, a very small number of manufacturers that produce ordinary particles also add formaldehyde. To ensure particle strength, devices for producing large particles must use formaldehyde. As for the device used to produce ordinary particles, it’s difficult to quantify exactly how effective adding formaldehyde is; those who have relevant data are asked to share it. As for the location where formaldehyde is added, it is best to add it at the inlet of the melt pump. If added in front, formaldehyde will also evaporate as heating proceeds. This is just my opinion; I hope experts can continue. This post was last edited by ymtuegj12 on 2009-2-3 14:04.]
Adding formaldehyde can also delay the fertilizer efficiency—slow-release urea-based nitrogen fertilizers. It can also be added at the outlet of the melt pump. This post was last edited by ymtuegj12 on 2009-2-3 14:04.]
May I ask: Do you add it at the outlet of the melt pump? Is just adding it at the pump outlet sufficient for the reaction time? We add it to the “U”; in order to achieve uniform mixing and a reaction that produces urea aldehyde to enhance strength, the value has been increased from 3.0 Newtons to 5.0 Newtons. At the same time, the dust at the bottom of the tower also decreased significantly. But a portion of it does evaporate, and there is a trace amount of formaldehyde in the ammonia tank. It would be ideal if it could be added at the outlet of the melting pump; I hope the expert upstairs can provide some guidance.