Pipe Reactor and Plant For Manufacturing of Especially Urea Ammonium Sulphate

• US 20080145283A1
• Filed: 03/02/2005
• Published: 06/19/2008
• Est. Priority Date: 03/02/2005
• Status: Active Grant

• Current Assignee: YARA International ASA
• Original Assignee: YARA International ASA
• Inventors: Duponchel, Vincent, Vogel, Edmond, Ledoux, Francois
• Granted Patent: US 8,524,165 B2
• Time in Patent Office: Days
• US Class Current: 422/187
• CPC Class Codes: B01J 19/26 Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• CPC Class Codes: B01J 2219/00119 Heat exchange inside a feeding nozzle or nozzle reactor
• CPC Class Codes: B01J 4/002 Nozzle-type elements nozzle-type reactors B01J19/26
• CPC Class Codes: C05C 3/00 Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
• CPC Class Codes: C05C 9/005 Post-treatment

Abstract

Pipe reactor, especially for production of UAS, comprising a tubular body 14 and a reactor head 1, wherein the reactor head has means (3,3A) for axial injection of acid, means (2,2A) for injection of ammonia, means (7) for supply of urea and a reaction chamber (zone 3A, 2A), where acid and ammonia can react before coming into contact with urea.

Claims

1. Pipe reactor, especially for production of UAS, comprising a tubular body 14 and a reactor head 1, wherein the reactor head has means (3,3A) for axial injection of acid, means (2,2A) for injection of ammonia, means (7) for supply of urea and a reaction chamber (zone 3A, 2A), where acid and ammonia reactions are enhanced before coming into contact with urea.

3. Pipe reactor according to claim 1,

wherein a pre-reactor for pre-neutralizing the acid is arranged upstream of the reactor head.

4. Pipe reactor according to claim 3,

wherein the pre-reactor is a pipe reactor or a tank neutralizer.

5. Pipe reactor according to claim 4, wherein the pre-reactor is part of the main pipe reactor, and the means for injection of ammonia or other base includes an inlet (9).

6. Pipe reactor according to claim 1,

wherein a mixer (12) for dilution of the acid is arranged upstream of the reactor head.

7. Pipe reactor according to claim 1,

wherein the reactor head has a convergent (1A) at its downstream end.

8. Pipe reactor according to claim 1,

wherein the means for injection of ammonia or other base includes an inlet (8) corresponding with an annular chamber surrounding the acid injector (3,3A).

9. Pipe reactor according to claim 8,

wherein the annular chamber has a cone (2A) or an open end in its downstream end.

10. Pipe reactor according to claim 1,

wherein the means for supply of urea or other sensitive component comprises a urea inlet (7) and an annular chamber surrounding the ammonia or other base injector (2, 2A).

2. Pipe reactor, comprising a tubular body 14 and a reactor head 1, wherein the reactor head has means (3,3A) for axial injection of acid, means (2,2A) for injection of a base, means (7) for supply of a heat and/or acid sensitive component and a reaction chamber (zone 3A, 2A), where acid and base reactions are enhanced before coming into contact with the sensitive component.

19. Pipe reactor according to claim 2,

wherein a pre-reactor for pre-neutralizing the acid is arranged upstream of the reactor head.

20. Pipe reactor according to claim 2,

wherein a mixer (12) for dilution of the acid is arranged upstream of the reactor head.

21. Pipe reactor according to claim 2,

wherein the reactor head has a convergent (1A) at its downstream end.

22. Pipe reactor according to claim 2,

wherein the means for injection of ammonia or other base includes an inlet (8) corresponding with an annular chamber surrounding the acid injector (3,3A).

23. Pipe reactor according to claim 2,

wherein the means for supply of urea or other sensitive component comprises a urea inlet (7) and an annular chamber surrounding the ammonia or other base injector (2, 2A).

11. A plant for manufacturing of urea ammonium sulphate, having a pipe reactor comprising a tubular body 14 and a reactor head 1, wherein the reactor head has means (3,3A) for axial injection of acid, means (2,2A) for injection of ammonia, means (7) for supply of urea and a reaction chamber (zone 3A, 2A) where acid and ammonia can react before coming into contact with urea, a separator to separate steam produced from the UAS slurry and means for receiving the steam.

12. A plant according to claim 11, wherein the reactor head (1) is preceded by a pre-reactor, which has means (9) for injection of ammonia, means (4) for supply of acid and a reaction chamber (4A).

13. A plant according to claim 11,

wherein a mixer (12) for dilution of the acid is arranged upstream of the reactor head.

14. A plant according to claim 11,

wherein the means for receiving the steam is a scrubber (S1, S2).

15. A plant according to claim 14, wherein the scrubber is designed in two distinct stages (S1, S2).

16. A plant according to claim 14, wherein the scrubber has means 11 for recycling scrubbing solution to the urea inlet 7 and/or to the acid injector 3.

17. A plant according to claim 11, wherein the separator is followed by a flash tank.

18. A plant according to claim 11, wherein the production of ammonium urea sulphate is a tail end process of a urea plant.

24. A plant according to claim 15, wherein the scrubber has means 11 for recycling scrubbing solution to the urea inlet 7 and/or to the acid injector 3.