Urea phosphate production method
A technology of urea phosphate and phosphoric acid solution, which is applied in ammonium orthophosphate fertilizers, chemical instruments and methods, alkaline orthophosphate fertilizers, etc., and can solve the problems of inability to continuously produce feed products, high production costs, and total recovery of phosphorus and nitrogen Low cost, low cost, low production cost, and increased hydrogen ion concentration
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Embodiment 1
[0041] Embodiment 1 adopts the inventive method to produce urea phosphate
[0042] The indicators of the raw material phosphoric acid used are shown in Table 1.
[0043] The index of table 1 raw material phosphoric acid
[0044]
[0045] Follow the steps below for production:
[0046] (1) add sulfuric acid to raw material phosphoric acid, heat up and react:
[0047] Phosphoric acid from the wet system, temperature 72 ° C, through the phosphoric acid flow meter at 1.45m 3 The flow rate of / h enters the acid distribution tank and the sulfuric acid (sulfuric acid concentration 98wt%) from the sulfuric acid storage tank is measured by 0.087m 3 The flow rate of / h is used for acid mixing, and the stirring and mixing are pumped into the heat exchanger for circulation heating. The heating medium is low-pressure steam, the pressure is 0.2-0.6MPa, the mixed acid solution is heated to 75-80°C, and the outlet valve of the circulation pump is opened to continue Supply acid to the r...
Embodiment 2
[0057] Embodiment 2 adopts the inventive method to produce urea phosphate
[0058] The indicators of the raw material phosphoric acid used are shown in Table 3.
[0059] Table 3 Index of Raw Phosphoric Acid
[0060] P 2 o 5 %
SO 3 %
F%
Mg%
As%
Pb%
Exterior
54.0
1.36
0.40
2.4
0.0030
0.0004
brownish yellow liquid
1.66
[0061] Follow the steps below for production:
[0062] (1) add sulfuric acid to raw material phosphoric acid, heat up and react:
[0063] Phosphoric acid from the wet process system, temperature 72 ° C, through the phosphoric acid flow meter at 1.24m 3 The flow rate of / h enters the acid distribution tank and the sulfuric acid (sulfuric acid concentration 93wt%) from the sulfuric acid storage tank is measured by sulfuric acid at 0.060m 3 The flow rate of / h is used to prepare acid, and the stirring and mixing are pumped into the heat exchange...
Embodiment 3
[0073] Embodiment 3 adopts the inventive method to produce urea phosphate
[0074] The indicators of the raw material phosphoric acid used are shown in Table 5.
[0075] Table 5 Index of Raw Phosphoric Acid
[0076] P 2 o 5 %
SO 3 %
F%
Mg%
As%
Pb%
Exterior
58.0
2.36
0.30
2.3
0.0030
0.0004
brownish yellow liquid
1.72
[0077] Follow the steps below for production:
[0078] (1) add sulfuric acid to raw material phosphoric acid, heat up and react:
[0079] Phosphoric acid from the wet system, temperature 72 ° C, through the phosphoric acid flow meter at 1.45m 3 The flow rate of / h enters the acid distribution tank and the sulfuric acid (sulfuric acid concentration 98wt%) from the sulfuric acid storage tank is measured by sulfuric acid at 0.050m 3 The flow rate of / h is used to prepare acid, and the stirring and mixing are pumped into the heat exchanger for ci...
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