Steam reboiler with expansion joint

Abstract

The invention discloses a steam reboiler with expansion joints. The steam reboiler comprises a reboiler casing and a heat exchange pipe bundle, wherein each of the upper end and the lower end of the reboiler casing is provided with a seal head; the heat exchange pipe bundle is arranged in the reboiler casing; the reboiler casing is sequentially provided with a pipe stroke discharging opening, a steam inlet, a steam outlet and a pipe stroke feeding opening from top to bottom; the pipe stroke discharging opening and the pipe stroke feeding opening communicate with the heat exchange pipe bundle; the space formed by the part within the reboiler casing and the part beyond the heat exchange pipe bundle is a shell pass space; the steam inlet and the steam outlet communicate with the shell pass space; the reboiler casing comprises multiple sections of unit casings; the unit casings are connected through the annular expansion joints. The manufacturing length of the reboiler casing is increased; the use range of the reboiler is enlarged; the stress effect of heat expansion and cold contraction on the reboiler casing is reduced; the service life of the reboiler casing is prolonged; the production cost is reduced; the occurrence of internal leakage is reduced.

Description

Technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a steam reboiler with an expansion joint. Background technique [0002] At present, many distillation towers in chemical production are equipped with reboilers, which are indirectly heated by steam through the reboilers. The rationality of the reboiler design structure and the quality of manufacturing directly affect the product quality, energy consumption and the service life of the reboiler. [0003] There are usually two types of reboilers, floating head type and tube-and-tube type. Because of their simple structure and easy cleaning, they are widely used. However, the existing tubular steam reboiler has the following problems: the working temperature of the reboiler is generally high, the temperature difference between the tube side and the shell side medium is large, and the tube sheet and the heat exchange tube are prone to cracking due to thermal stress. , Resulting i...

AI Technical Summary

Problems solved by technology

However, the existing shell-and-tube steam reboiler has the following problems: the working temperature of the reboiler is generally high, the temperature difference between the tube side and the shell side medium is relatively large, and the tube sheet and the heat exchange tube are prone to cracking due to thermal stress , resulting in the interlinking of the tube side and the shell side media, causing production accidents and affecting product quality

At the same time, if the volume of the reboiler becomes larger, it is also prone to cracking due to the stress of thermal expansion and contraction during the process of starting and shutting down, which seriously reduces the service life of the equipment in the production process

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