Low-temperature methanol-methanol winding tubular heat exchanger design and calculation method

Abstract

The invention provides a low-temperature methanol-methanol winding tubular heat exchanger design and calculation method and is mainly applicable to the fields of coal gas, coal methanol and other coal chemical industries comprising the fields of low-temperature gas purification and low-temperature liquefied separation for low-temperature methanol wash process at the temperature of -70 DEG C. The design and calculation process comprises basic structural design and a heat exchange process calculation process, wherein the process calculation comprises the steps of: determining qualitative temperature of a low-temperature methanol inlet/outlet, searching physical methanol parameters under the qualitative temperature and pressure, calculating logarithmic mean temperature difference, calculating a thermal load, determining the specification of a heat exchanger, determining a pipeline arrangement mode, and calculating a total heat transfer coefficient, total heat transfer area, effective heat exchange height of the heat exchanger and other main parts. According to the method, a complete mathematical model for low-temperature methanol-methanol winding tubular heat exchanger process calculation is provided, the mathematical model can be applied to the heat exchange process calculation process of winding pipe bundles, so that a whole set of methanol-methanol winding tubular heat exchanger is designed.

Description

technical field [0001] The invention relates to a design and calculation method for a low-temperature methanol-methanol winding tube heat exchanger, which is mainly used in coal chemical industry fields such as coal-to-gas and coal-to-methanol, including the technical fields of low-temperature gas purification and low-temperature liquefaction separation such as -70°C low-temperature methanol washing process . Background technique [0002] Low-temperature methanol-methanol winding tube heat exchanger is a single-tube-bundle spiral-coil heat exchange equipment formed by layer-by-layer winding of heat exchange pipes. Methanol and tube pass less than 10MPa, +60~-60℃ methanol for heat exchange and other processes, mainly by the tube pass inlet connection (1), shell upper head (2), built-in upper tube box (3), built-in upper tube Plate (4), shell side outlet connection (5), shell (6), upper support ring (7), spiral tube bundle (8), core tube (9), lower support ring (10), shell si...

AI Technical Summary

Problems solved by technology

Since the low-temperature methanol-methanol winding tube heat exchanger is used in a low-temperature environment, the internal pipe winding is complicated, there is no general design standard, and there is no unified calculation method for heat exchange process design. Therefore, it is difficult to standardize the low-temperature methanol-methanol coiled tube heat exchanger

In addition, because there are many winding methods for the spiral tube bundle (8) of the low-temperature methanol-methanol wound tube heat exchanger, there is no unified tube winding mode and theoretical design calculation method for the computer-aided calculation process. The scientific computing process of the machine presents obstacles

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