Modularizing transformation method of convection section of ethylene cracking furnace and convection section module of the ethylene cracking furnace

Abstract

The invention provides a modularizing transformation method of a convection section of an ethylene cracking furnace and a convection section module of the ethylene cracking furnace. According to the method, a first bearing column is reused; all parts in the convection section are prefabricated into an integrated convection section module; and the convection section module is installed on the first bearing column to complete the transformation of the convection section module. The convection section module consists of a heat exchange tube bundle, a tube sheet, a smoke-insulating plate, a modularized steel structure and a liner. The tube sheet is arranged on an end of the convection section module. The smoke-insulating plate is disposed on an inner side of the tube sheet. The tube sheet and the smoke-insulating plate are arranged at an interval in the length direction of the convection section module. The modularized steel structure is fixedly connected to the first bearing column. By means of the transformation method, locally modularizing transformation of the convection section of the ethylene cracking furnace is achieved without replacement of the first bearing column so that equipment such as a top bench, a fan and a steam drum is unnecessary to move. The method can improve manufacturing quality, can shorten a construction period, can reduce construction difficulty and can reduce installation cost.

Description

technical field [0001] The invention relates to the field of petrochemical equipment, in particular to a method for modularizing the convection section of an ethylene cracking furnace and a convection section module thereof. Background technique [0002] The cracking furnace is one of the core equipment of the ethylene plant. The convection section is one of the core components of the cracking furnace. Its main function is to recover the heat in the high-temperature flue gas to preheat the raw materials and steam, thereby reducing the exhaust gas temperature and improving the temperature of the cracking furnace. thermal efficiency. Due to technical limitations of the cracking furnaces designed and built in the early stage, various technical indicators are relatively backward after long-term operation. In order to increase production capacity, save energy and reduce emissions, and improve the flexibility of raw materials, the convection section of the cracking furnace must b...

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Problems solved by technology

[0012] In order to solve the problem that the existing convection section needs to be installed on the construction site, the installation period is long and the installation quality is not good. At the same time of modular transformation, it can ensure that the overall bearing structure of the original cracking furnace does not change

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