A method and apparatus for drier/guard bed regeneration of mtp plant

Abstract

The invention discloses a method and equipment for regenerating dryers / protection beds of an MTP (Methanol To Propylene) device. According to the method, a fuel gas is used as a regeneration gas source; fuel gas generated by the MTP device and the fuel gas from the boundary are conveyed into a fuel gas pipe net of the MTP device; one path of the fuel gas is introduced from the fuel gas pipe net to a heater; the fuel gas introduced to the heater is heated to the temperature for regenerating the dryers / protection beds and then is used as a hot regeneration gas; the other branch of the fuel gas is introduced from the fuel gas pipe net to be used as cold regeneration gas; the heat regeneration gas and the cold regeneration gas are proportionally mixed according to different regeneration temperature requirements and then are conveyed into the dryers / protection beds; the fuel gas from the dryers / protection beds is cooled and is conveyed into a flash tank; then the fuel gas containing water is divided into two paths at the top of the flash tank; one path of the fuel gas is directly conveyed into a heating furnace to be used as a fuel and the other path of the fuel gas is pressurized by a circulating fuel gas compressor; and then, the fuel gas is cooled and is conveyed into the fuel gas pipe net, so that the internal circulation of the fuel gas is realized.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method and equipment for regeneration of a drier / guard bed of an MTP device. Background technique [0002] In the existing device MTP, the regeneration of the dryer / guard bed usually uses nitrogen as the regeneration gas source. When nitrogen is used as the regeneration gas source, after the drying process is completed, the dryer / guard bed is turned into an online state, and the adsorbed on the desiccant body Nitrogen, as an impurity gas, is easily substituted into the downstream system by inclusions, which will disturb the purity of the product of the device and the downstream separation operation. At present, the regeneration of the dryer / guard bed of the device is a non-circulating operation, and a large amount of fresh nitrogen needs to be reintroduced each time as the regeneration gas source, resulting in a large consumption of public works for the device, and the device i...

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Problems solved by technology

[0003] The present invention provides a method and equipment for regeneration of drier / guard bed in MTP device, which is used to solve the problem of impurity gas introduced by regeneration of drier / guard bed in existing devices, large consumption of public works, and frequent torching during regeneration

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