喷嘴结构改进及其液体射流过程颗粒团聚研究

杨宁; 周云龙; 马书生

doi:10.11949/0438-1157.20190138

您当前的位置：

首页 >

文章列表页 >

喷嘴结构改进及其液体射流过程颗粒团聚研究

流体力学与传递现象 | 更新时间：2020-06-24

- 喷嘴结构改进及其液体射流过程颗粒团聚研究
- Nozzle structure improvement and study of particles agglomeration during liquid injection
- 化工学报 2019年70卷第S2期页码：169-180
- 作者机构：
  
  1.东北电力大学能源与动力工程学院，吉林省吉林市 132012
  2.多能源互补高效供能管理技术国家地方联合工程实验室，吉林省吉林市 132012
- 作者简介：
  
  杨宁（1989—），男，博士，讲师，yangning@neepu.edu.cn
  周云龙（1960—），男，博士，教授，ylzhou@neepu.edu.cn
- 基金信息：
  
  吉林省产业技术开发专项(2019C056-2);吉林省教育厅“十三五”科学技术研究项目(JJKH20180438KJ)
- DOI：10.11949/0438-1157.20190138
  中图分类号： TK 121
- 收稿：2019-02-21，
  
  修回：2019-04-08，
  
  纸质出版：2019-09-05
- 稿件说明：
移动端阅览
杨宁, 周云龙, 马书生. 喷嘴结构改进及其液体射流过程颗粒团聚研究[J]. 化工学报, 2019, 70(S2): 169-180

YANG Ning, ZHOU Yunlong, MA Shusheng. Nozzle structure improvement and study of particles agglomeration during liquid injection[J]. CIESC Journal, 2019, 70(S2): 169-180
杨宁, 周云龙, 马书生. 喷嘴结构改进及其液体射流过程颗粒团聚研究[J]. 化工学报, 2019, 70(S2): 169-180 DOI： 10.11949/0438-1157.20190138.

YANG Ning, ZHOU Yunlong, MA Shusheng. Nozzle structure improvement and study of particles agglomeration during liquid injection[J]. CIESC Journal, 2019, 70(S2): 169-180 DOI： 10.11949/0438-1157.20190138.

摘要

在重质原料液的射流阶段降低反应温度会导致液体呈现不同的黏度，促使颗粒聚集形成不同尺寸的团聚结构，阻碍了原料液的热量传递，减缓了裂化反应的速率，颗粒团聚是流体焦化反应工艺面临的一个重要而又具有挑战性的问题。选用水-沙系统模拟热态沥青-焦炭系统，利用气罩装置改进喷嘴结构，基于电导信号法测量多黏度液体射流过程的电导信号随时间的变化规律，研究不同条件下流化床内颗粒团聚过程。研究结果表明：多孔气罩装置可以为喷嘴射流创造理想的稀相环境，避免了液滴在射流空腔以及交换区域的聚集和压缩；液体射流在床层扩散过程中可以观察到不同的流化阶段，即颗粒润湿阶段、团聚形成阶段、团聚隔离阶段；较高的气液比可以有效地阻止颗粒团聚，相比于较低的流化气速，较高的气速条件允许高黏度糖水溶液参与液体射流。本研究为多黏度液体射流过程颗粒团聚现象的在线监测提供了理论研究基础，确保了流化床内射流液滴与颗粒表面的良好接触。

Abstract

Reducing the reaction temperature during the raw liquid injection stage will lead to different viscosities of liquid

and result in particles adhesion forming agglomeration in different sizes

this hinders heat transfer to reacting liquid and slows the cracking reactions. Therefore

particles agglomeration is an important and challenging problem for thermal cracking in fluid cokers. In the present study

the gas shroud attachment was used to improve nozzle structure

and the particles agglomeration process during nozzle injection of multi-viscosity liquid was investigated in a fluidized bed operated at different conditions based on a conductance method using a water-sand system to simulate the hot bitumen-coke system at room temperature. The results show that the porous gas shroud attachment can create an ideal dilute phase environment for liquid injection and avoid the droplets accumulation in the injection cavity and particles exchange area. Different stages can be observed during the liquid injection dispersion throughout the bed

the wetting stage

the agglomerate formation stage

and the agglomerate segregation stage. A higher gas-liquid ratio (GLR) of the nozzle provides a method to prevent particles agglomeration

and the conditions at a high gas velocity allow a higher concentration of sucrose in the liquid injection compared with that at a low fluidizing gas velocity. This study provides a theoretical basis for on-line monitoring of particles agglomeration during liquid injection to guarantee perfect contact between the atomized droplets and the bed particles.

关键词

Keywords

references

汪燮卿 , 舒兴田 . 重质油裂解制轻烯烃 [M]. 北京 : 中国石化出版社 , 2015 : 1 - 10 .

Wang X Q , Shu X T . Heavy Oil Catalytic Cracking Technology for Production of Light Olefins [M]. Beijing : China Petrochemical Press , 2015 : 1 - 10 .

张璐瑶 , 赵广辉 , 刘银东 , 等 . 国内外劣质重油脱碳技术进展 [J]. 石化技术与应用 , 2014 , 32 ( 3 ): 259 - 265 .

Zhang L Y , Zhao G H , Liu Y D , et al . Worldwide advance of carbon rejection processes for heavy oil [J]. Petrochemical Technology & Application , 2014 , 32 ( 3 ): 259 - 265 .

Sheng Q , Wang G , Liu Y J , et al . Pilot-scale evaluation of hydrotreating inferior coker gas oil prior to its fluid catalytic cracking [J]. Fuel , 2018 , 226 : 27 - 34 .

李佳 , 周如金 . 我国重质油催化裂解制低碳烯烃技术现状 [J]. 当代化工 , 2015 , 44 ( 12 ): 2802 - 2804 .

Li J , Zhou R J . Research progress in heavy oil catalytic cracking technology for production of light olefins [J]. Contemporary Chemical Industry , 2015 , 44 ( 12 ): 2802 - 2804 .

曹春燕 . 优化原油加工轻质油收率的探索 [D]. 天津 : 天津大学 , 2012 : 1 - 11 .

Cao C Y . Exploration in the optimizing of crude oil processing and improving the yield of light oil [D]. Tianjin : Tianjin University , 2012 : 1 - 11 .

王峰 . MTP工艺副产轻质油在HZSM-5上催化裂解行为的研究 [J]. 现代化工 , 2018 , 38 ( 9 ): 122 - 126 .

Wang F . Catalytic cracking behavior of MTP by-product light oil over HZSM-5 catalyst [J]. Modern Chemical Industry , 2018 , 38 ( 9 ): 122 - 126 .

张雅琳 , 张占全 , 王燕 , 等 . 费托合成油和石油基油加工产品对比分析 [J]. 化工进展 , 2018 , 37 ( 10 ): 3781 - 3787 .

Zhang Y L , Zhang Z Q , Wang Y , et al . Comparative analysis of products from Fischer-Tropsch oil and petroleum based oil [J]. Chemical Industry and Engineering Progress , 2018 , 37 ( 10 ): 3781 - 3787 .

Yang M F , Shao J G , Yang H P , et al . Enhancing the production of light olefins and aromatics from catalytic fast pyrolysis of cellulose in a dual-catalyst fixed bed reactor [J]. Bioresource Technology , 2019 , 273 : 77 - 85 .

Weber S , Briens C , Berruti F , et al . Stability of agglomerates made from fluid coke at ambient temperature [J]. Powder Technology , 2011 , 209 : 53 - 64 .

Inagaki S , Matsunaga I , Kikuchi E , et al . 03-P-14—Influence of nano-particle agglomeration on the catalytic properties of MFI zeolite [J]. Studies in Surface Science and Catalysis , 2001 , 135 : 332 .

Mcdougall S , Saberian M , Briens C , et al . Effect of liquid properties on the agglomerating tendency of a wet gas-solid fluidized bed [J]. Powder Technology , 2005 , 149 ( 23 ): 61 - 67 .

Kolkman T , van Sint Annaland M , Kuipers J A M . Development of anon-invasive optical technique to study liquid evaporation in gas-solid fluidized beds [J]. Chemical Engineering Science , 2016 , 155 , 277 - 293 .

Pore M , Chandrasekera T C , Holland D J , et al . Magnetic resonance studies of jets in a gas-solid fluidised bed [J]. Particuology , 2012 , 10 ( 2 ): 161 - 169 .

Berruti F , Dawe M , Briens C . Study of gas-liquid jet boundaries in a gas-solid fluidized bed [J]. Powder Technology , 2009 , 192 : 250 - 259 .

McMillan J , Zhou D , Saberian M , et al . Measurement techniques to characterize the contact between injected liquid and circulating solids in a downer mixing chamber [J]. Powder Technology , 2006 , 161 ( 3 ): 175 - 184 .

Leach A , Portoghese F , Briens C , et al . A new and rapid method for the evaluation of the liquid-solid contact resulting from liquid injection into a fluidized bed [J]. Powder Technology , 2008 , 184 : 44 - 51 .

Portoghese F , Berruti F , Briens C , et al . Novel triboelectric method for characterizing the performance of nozzles injecting gas-atomized liquid into a fluidized bed [J]. Chemical Engineering and Processing: Process Intensification , 2007 , 46 : 924 - 934 .

House P K , Briens C , Berruti F , et al . Effect of spray nozzle design on liquid-solid contact in fluidized beds [J]. Powder Technology , 2008 , 186 : 89 - 98 .

Ariyapadi S , Berruti F , Briens C , et al . Stability of horizontal gas-liquid sprays in open-air and in a gas-solid fluidized bed [J]. Powder Technology , 2005 , 155 ( 3 ): 161 - 174 .

McMillan J , Zhou D , Ariyapadi S , et al . Characterization of the contact between liquid spray droplets and particles in a fluidized bed [J]. Industrial and Engineering Chemistry Research , 2005 , 44 : 4931 - 4939 .

Portoghese F , Berruti F , Briens C . Continuous on-line monitoring of solid moisture content during fluidized bed drying using triboelectric probes [J]. Powder Technology , 2008 , 181 : 169 - 177 .

House P K , Saberian M , Briens C , et al . Injection of a liquid spray into a fluidized bed: particle-liquid mixing and impact on fluid coker yields [J]. Industrial and Engineering Chemistry Research , 2004 , 43 : 5663 - 5669 .

Prociw N , Briens C , Berruti F , et al . Effect of spray nozzle attachment geometry on rate of liquid released from agglomerates produced by gas-atomized liquid injection into a fluidized bed [J]. Powder Technology , 2018 , 325 : 280 - 288 .

Castañeda L C , Muñoz J A D , Ancheyta J . Combined process schemes for upgrading of heavy petroleum [J]. Fuel , 2012 , 100 : 110 - 127 .

Valle B , Aramburu B , Olazar Martin , et al . Steam reforming of raw bio-oil over Ni/La 2 O 3 -αAl 2 O 3 : influence of temperature on product yields and catalyst deactivation [J]. Fuel , 2018 , 216 : 463 - 474 .

Radmanesh R , Chan E R , Gray M . Modeling of mass transfer and thermal cracking during the coking of Athabasca residues [J]. Chemical Engineering Science , 2008 , 63 ( 6 ): 1683 - 1691 .

McDougall S , Saberian M , Briens C , et al . Effect of liquid properties on the agglomerating tendency of a wet gas-solid fluidized bed [J]. Powder Technology , 2005 , 149 ( 23 ): 61 - 67 .

Weber S , Briens C , Berruti F , et al . Effect of agglomerate properties on agglomerate stability in fluidized beds [J]. Chemical Engineering Science , 2008 , 63 ( 17 ): 4245 - 4256 .

周云龙 , 杨宁 . 流化床颗粒团聚物水分分布测量新技术 [J]. 化工学报 , 2014 , 65 ( 10 ): 3878 - 3883 .

Zhou Y L , Yang N . A new method for measuring moisture distribution in fluidized bed [J]. CIESC Journal , 2014 , 65 ( 10 ): 3878 - 3883 .

Sobrino C , Sánchez-Delgado S , García-Hernando N , et al . Standard deviation of absolute and differential pressure fluctuations in fluidized beds of group B particles [J]. Chemical Engineering Research & Design , 2008 , 86 : 1236 - 1242 .

Vazquez A , Manasseh R , Sánchez R M , et al . Experimental comparison between acoustic and pressure signals from a bubbling flow [J]. Chemical Engineering Science , 2008 , 63 ( 24 ): 5860 - 5869 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

气固流化床中颗粒团聚物的静态特征和湮灭规律研究

连续进料多腔室流化床停留时间分布数值模拟

含导流板喷雾流化床内颗粒包覆过程热质传递特性模拟研究

水溶性聚合物型稠油降黏剂研究进展

R513A与PVE润滑油的溶解度及黏度研究