Isothermal shift reactor with coiled tube type heat exchange tube

Abstract

The invention discloses an isothermal shift reactor with a coiled type heat exchange tube. The isothermal shift reactor comprises a shell, a boiler water supply header and the coil type heat exchange tube, a partition plate, a filter screen, a conversion reaction catalyst bed layer and a distributor are arranged in the shell from top to bottom, an end socket is arranged at an outlet in the top of the shell, the conversion reaction catalyst bed layer is located between the filter screen and the distributor, the boiler water supply collecting box is located above the distributor, the lower end of the disc type heat exchange pipe is communicated with an inlet of the boiler water supply collecting box, the upper end of the disc type heat exchange pipe penetrates through the conversion reaction catalyst bed layer and the filter screen to be communicated with the through hole in the partition plate, a steam outlet is formed in the top of the sealing head, and the reactor has the advantages of being large in heat exchange area, low in internal part thermal stress, low in water supply flow speed, good in heat exchange effect and low in power consumption.

Description

technical field [0001] The invention belongs to the field of coal gasification, and relates to an isothermal conversion reactor with coiled heat exchange tubes. Background technique [0002] Shift reaction is a common type of unit operation in the chemical industry, and its process flow can be divided into adiabatic shift and isothermal shift. At present, isothermal transformation has attracted more and more attention from various industries because of its short process and simple operation. In order to keep the reaction catalyst bed from overheating, a heat exchange tube is installed inside the isothermal shift furnace to remove the reaction heat in time to produce steam. However, in the prior art, the heat exchange tubes are all arranged in rows of tubes. During the process of starting and shutting down, the temperature difference of the internal parts of the converter furnace is large, or the temperature in the reaction zone is uneven, which will cause thermal expansion ...

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Problems solved by technology

However, in the prior art, the heat exchange tubes are all arranged in rows of tubes. During the process of starting and shutting down, the temperature difference of the internal parts of the converter furnace is large, or the temperature in the reaction zone is uneven, which will cause thermal expansion to be out of sync, resulting in weld tearing and heat exchange tubes. Water Leakage

Moreover, the boiler feed water flows through the tubes for a short distance, high speed and large flow rate, so the power of the feed water pump is relatively large, and at the same time, the heat transfer effect is poor due to the small heat transfer area.

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