煤炭转化2024，Vol.47Issue(1)：38-48,11.DOI:10.19726/j.cnki.ebcc.202401005
基于Fluent的煤焦油悬浮床加氢反应器数值模拟与温度控制研究
Fluent-based numerical simulation and temperature control in coal tar slurry bed hydrogenation reactor
摘要
Abstract
The coal tar slurry bed hydrogenation reactor is the core equipment of coal tar slurry bed hydrogenation technology.However,a significant challenge in its practical application lies in the temperature surge observed in the upper and middle sections of the reactor.To address this issue,computational fluid dynamics and Fluent software were used to simulating tempera-ture variations within the hydrogenation reactor and investigates various temperature control strategies.The results show that the temperature within the coal tar slurry bed hydrogenation re-actor rapidly increases at a height of 3.0 m.After the implementation of a cold hydrogen tube at the specific location where the temperature surge occurs,the introduction of cold hydrogen not only effectively regulates the temperature in the upper part of the reactor,resolving the tempera-ture surge issue,but also led to a more uniform distribution of temperature both axially and ra-dially throughout the reactor.The suitable temperature range of cold hydrogen is 41℃-43℃,while the optimum temperature is 43℃.Furthermore,the alterations of the flow field within the reactor,both prior to and subsequent to the introduction of cold hydrogen were studied.Based on the simulation results of flow velocity patterns and the nephograms of temperature distribution,it can be inferred that without the introduction of cold hydrogen,local coking phenomenon occurs at the height of 3.5 m within the reactor.When the height reaches 5.0 m,local blockage caused by coking starts to appear in the reactor,and at a height of 5.5 m,serious blockages occur due to extensive coking.The introduction of 43℃ cold hydrogen not only resolves the temperature surge issues,but also inhibites the axial flow within the reactor,thereby promoting the radial flow and mixing of the reaction materials.This results in a more uniform distribution of velocity and gas holdup,which is beneficial to the mass transfer and coal tar hydrogenation within the re-actor.关键词
煤焦油悬浮床加氢/数值模拟/温度分布/流速分布/气含率Key words
coal tar slurry bed hydrogenation/numerical simulation/temperature distri-bution/flow velocity distribution/gas content分类
化学化工引用本文复制引用
黄鑫,高云鹤,郭莉,王丹军,牛鸿权,付鑫,付峰..基于Fluent的煤焦油悬浮床加氢反应器数值模拟与温度控制研究[J].煤炭转化,2024,47(1):38-48,11.基金项目
国家自然科学基金项目(22168040)和陕西省自然科学基础研究计划项目(S2022-JC-YB-1350). （22168040）
