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A method for recovering by-product steam from acetic acid plant

A technology for by-product steam and acetic acid, applied in the separation/purification of carboxylic acid compounds, organic chemistry and other directions, can solve the problems of large local discharge of by-product steam, energy waste, environmental pollution, etc., and achieve the effect of solving energy waste.

Active Publication Date: 2017-07-28
TIANJIN BOHUA YONGLI CHEM IND
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Problems solved by technology

[0004] In order to solve the problems existing in the prior art, the present invention provides a method for recovering the by-product steam of the acetic acid plant, which overcomes the large displacement of the by-product steam produced by the external circulation heat exchanger in the prior art, energy waste, and environmental pollution The problem

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  • A method for recovering by-product steam from acetic acid plant

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown in the system for recovering the by-product steam of the acetic acid plant, a first cut-off valve 1 is provided on the pipeline connecting the external heat exchanger and the 0.25Mpag steam pipe network of the acetic acid plant, and a second cut-off valve is provided on the pipeline of the 0.6Mpag steam pipe network. Valve 7; the first shut-off valve 1 and the second shut-off valve 7 are connected through pipelines and equipped with corresponding instrument accessories: first pressure transmitter 2, first regulating valve 3, thermometer 4, second pressure transmitter 5 and the first flow meter 6; in order to prevent the water storage in the newly connected pipeline from affecting the process stability, the sixth shut-off valve 12 and the seventh shut-off valve 13 are connected; the pipeline in the 0.6Mpag steam pipeline networ...

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Abstract

The invention discloses a method for recovering the by-product steam of the acetic acid device. The method is realized by a system for recovering the by-product steam of the acetic acid device. The system includes an external circulation heat exchanger, and the external circulation heat exchanger communicates with the 0.25Mpag steam of the acetic acid device through a pipeline The external circulation heat exchanger is also connected to the external 0.6Mpag steam pipe network through pipelines, and the 0.6Mpag steam pipe network is respectively connected to the No. 1 furnace of the torch smoke elimination and coal gasification. The method for recovering the by-product steam of the acetic acid device of the present invention can effectively recycle the by-product steam generated by the external circulation heat exchanger, and solve environmental problems such as energy waste and on-site noise and gas pollution.

Description

technical field [0001] The invention relates to a method for recovering hot steam, in particular to a method for recovering by-product steam of an acetic acid plant. Background technique [0002] In the process of producing acetic acid by methanol low-pressure liquid-phase carbonylation, the reaction of synthesizing acetic acid is an exothermic reaction. In order to maintain a constant reaction temperature and ensure that the reaction is carried out within the optimal temperature range, most of the reaction heat is exchanged through external circulation. The external circulation heat exchanger uses 1.6Mpag deoxygenated water as the cooling medium, so that 0.6Mpag by-product steam is generated after heat exchange, and it is incorporated into the 0.25Mpag steam pipe network for the installation in winter Heat tracing, while controlling the reaction temperature by adjusting the flow of the by-product steam it produces into the 0.25Mpag steam pipe network to maintain a constant ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C53/08C07C51/43
CPCC07C51/43C07C53/08
Inventor 刘杰汝海峰王立伟刘全伟岑建军
Owner TIANJIN BOHUA YONGLI CHEM IND
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