Replacement of urea synthesis tower lining
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The lining of the synthesis tower in the urea production process has always received attention from various factories. Due to factors such as service life, severe corrosion, and other abnormalities, many factories have replaced the lining of their synthesis towers. We are discussing the replacement of the lining in the synthesis tower. Please reply in the following format: (The title can be pasted directly) 1. Urea process and production capacity: 2. Service life and material of the original lining: 3. Reasons for replacement: 4. Material and specifications of the new lining: 5. Construction method (either by dismantling the tower structure or through access manholes): 6. Area to be replaced (the entire tower or only a portion): 7. Whether the original lining remains inside the tower: 8. Placement of leak detection holes in the new lining: 9. Performance of the new lining (brief evaluation). Please post in this format to receive double points. This post was last edited by Fan Zhou Wu Hu on 2009-3-12 01:02.]
The lining of the synthesis tower in the urea production process has always received attention from various factories. Due to factors such as service life, severe corrosion, and other abnormalities, many factories have replaced the lining of their synthesis towers. We are discussing the replacement of the synthetic tower lining. Please reply in the following format: (The title can be pasted directly) 1 Urea production process and capacity: Carbon dioxide stripping method, 2,300 tons per day 2 Service life and material of the original lining: 29 years, 316L 3 Reasons for replacement: Corrosion of the lining, leaks at the lining welds 4 Material and specifications of the new lining: 25-22-2, thickness 8 mm 5 Construction method (whether by dismantling the tower structure or entering through manholes): The upper head is cut off, and the lining is replaced from above 6 Area to be replaced (entire tower or part of it): Entire tower replaced 7 Whether the original lining remains inside the tower: The old lining is removed before installing the new one 8 Placement of leak detection holes in the new lining: New leak detection grooves are created on the pressure-bearing shell 9 Performance of the new lining (brief evaluation): The new lining is functioning well at present
A factory I’m aware of: Its urea production process and capacity last year were as follows – ammonia stripping method, with a daily production of 1,760 tons. 2. Service life and material of the original lining: 14 years; material: 316L. 3. Reasons for replacement: Corrosion of the lining, as well as multiple leaks at the seams of the lining. 4. Material and specifications of the new lining: Unknown. 5. Method of installation (whether by dismantling part of the tower or through access manholes): The tower was dismantled in sections. 6. Area to be replaced (entire tower or part of it): The entire tower was replaced. 7. Whether the original lining remained inside the tower: The old lining was removed before installing the new one. 8. Presence of leak detection holes in the new lining: Unknown. 9. Performance of the new lining (brief evaluation): The new lining is functioning well so far
This plant should have the following characteristics: 1. Urea production process and capacity: ammonia stripping method, with a daily production of 1,760 tons. 2. Service life and material of the original lining: 14 years, 316L material. 3. Reasons for replacement: corrosion of the lining, as well as multiple leaks at the seams of the lining. 4. Material and specifications of the new lining: 2522. 5. Method of installation (whether by dismantling part of the tower or through access holes): the tower is divided in the middle for dismantling, commonly known as cutting it in half. 6. Scope of replacement (entire tower or only part of it): the entire tower is replaced. 7. Whether the original lining remains inside the tower: the old lining is removed before installing the new one. 8. Placement of leak detection holes in the new lining: the existing leak detection channels are retained. 9. Performance of the new lining (brief evaluation): The new lining is performing well at present
Another point: This plant should have the following features: 1. Urine treatment process and capacity: Ammonia stripping method, with a daily production capacity of 500 tons. 2. Service life and material of the original lining: 13 years; material is 316L MOD 3. Reason for replacement: Corrosion leading to thinning of the lining; no leaks have occurred. 4. Material and specifications of the new lining: 725LN. 5. Method of installation (either by dismantling part of the tower or by accessing it through manholes): The top cover is cut off first. 6. Area to be replaced (entire tower or only part of it): The entire tower is replaced. 7. Whether the original lining remains inside the tower: The old lining is removed before installing the new one. 8. Placement of leak detection holes in the new lining: The existing leak detection channels are retained. 9. Performance of the new lining (brief evaluation): The new lining is functioning well at present