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Tube bundle apparatus for processing corrosive fluids

A corrosive, fluid technology, applied in lighting and heating equipment, fixed catheter components, chemical/physical processes, etc., can solve problems such as increasing the operating life of equipment

Inactive Publication Date: 2005-08-10
SNAMPROGETTI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This new approach also allows for a reduction in the amount of heavy corrosion resistant material used for the lining, yet significantly increases the operating life of the equipment

Method used

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  • Tube bundle apparatus for processing corrosive fluids
  • Tube bundle apparatus for processing corrosive fluids
  • Tube bundle apparatus for processing corrosive fluids

Examples

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Embodiment Construction

[0066] The stripping tower shown in Figure 1 is positioned vertically and basically includes three hollow parts, a hemispherical upper chamber 1, a cylindrical middle chamber 3 and a hemispherical lower chamber 2, wherein the tube bundle passes through the middle chamber 3 . The cylindrical portion has a diameter of about 1.5-2 meters and a length of about 4-6 meters. There are two manholes 7 and 8 at the upper and lower ends of the device, while chambers 1 and 2 are separated from chamber 3 by two tube sheets 15 and 16, each with 1500 to 4000 holes for discharge tube. The remainder of the side walls of the two chambers 1 and 2 are surrounded by a pressure-resistant body 14 .

[0067] The temperature of the solution from the urea synthesis reactor is about 180-200°C and the pressure is about 14-17MPa, including urea, water, excess ammonia water, and unconverted carbamate. The solution reaches the upper chamber 1 from the pipeline 9, And it is distributed using the annular c...

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Abstract

Tube bundle apparatus for thermal exchange operations at high pressures and temperatures, under conditions of high aggressiveness of the process fluids, wherein the tube bundle comprises a series of tubes (4) whose internal wall is essentially constituted by a material selected from titanium, zirconium or an alloy of one of these, resistant to the aggression of said fluids, in which at least one of the access chambers to the tube bundle is DELIMITED by a wall comprising at least the following three metallic layers in succession: a) an external layer (21) suitable for tolerating the pressure load, subject to corrosion by contact with said highly aggressive process fluid; b) an intermediate layer (22) made of stainless steel; (c) an anticorrosive lining (23) in contact with said highly corrosive fluid, consisting of a material selected from titanium, zirconium or an alloy of one of these. Said apparatus is particularly used as ex- changer / reactor, for example as a stripper, in the high pressure cycle of synthesis processes of urea.

Description

technical field [0001] The invention relates to a tube bundle device for treating corrosive fluid. [0002] More specifically, the present invention relates to a lined tube bundle plant, especially in a urea production plant, suitable for handling corrosive fluid. Background technique [0003] Regardless of whether the high-pressure equipment is a reactor, separator, boiler or other equipment in which there is a high heat exchange, usually the construction technique of the high-pressure equipment consists of assembling a compact pressure body capable of withstanding the operating Ensuring maximum safety and durability, equipped with necessary access for external communication and control, as well as inlet and outlet for process fluids. The most widely used material for such structures is carbon steel due to its combined advantages of optimized mechanical properties, lower cost and commercial availability. In order to maximize the exchange surface, the tube bundle is usual...

Claims

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Application Information

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IPC IPC(8): B01J19/02B01J19/24F28D3/02F28F19/06
CPCB01J19/2425F28D3/02B01J19/02F28F19/06B01J2219/0236B01J2219/00024
Inventor 乔治·甘多尔菲朱塞佩·梅雷利安德烈亚·斯科托吉安·P·泰斯塔
Owner SNAMPROGETTI SPA
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