CN106844829A - 污水处理的平垂扰流（pvfl）流态数值模拟优化技术 - Google Patents

污水处理的平垂扰流（pvfl）流态数值模拟优化技术 Download PDF

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CN106844829A
CN106844829A CN201611114214.7A CN201611114214A CN106844829A CN 106844829 A CN106844829 A CN 106844829A CN 201611114214 A CN201611114214 A CN 201611114214A CN 106844829 A CN106844829 A CN 106844829A
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flow
numerical simulation
pvfl
equation
model
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王展旭
王旌舟
祁丽华
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Qingdao University of Science and Technology
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Qingdao University of Science and Technology
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/152—Water filtration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

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Abstract

本发明属污水处理技术领域，提供一种污水处理设备的平垂扰流(PVFL)流态数值模拟优化技术，具体涉及污水生化处理的流态数值模拟优化技术，根据模拟结果设计的PVFL水处理设备能够使外排水质达到“可饮用”标准。该装备在煤化工、页岩油气压裂(钻井)、石油化工、军事野战营地、旅游房车营地和环保污水处理具有广泛的应用市场和很好的经济效益。

Description

污水处理的平垂扰流(PVFL)流态数值模拟优化技术
技术领域
本发明属污水处理技术领域，提供一种污水处理设备的平垂扰流(PVFL)流态数值模拟优化技术。
背景技术
污泥是污水处理工艺中的世界难题。污泥处理设备投资占水处理工艺中的46％～60％，但是仍然无法彻底解决污泥的恶臭、有害有毒化学品、重金属和放射性元素等难题，仍然无法彻底解决其排放对自然环境的“二次污染”问题，仍然无法彻底解决污水处理资源高值化再利用问题。
本发明根据平面层流与垂直流动的交错搅动流态PVFL的扰流机理，通过设备的迷宫结构实现了PVFL。目前通过实施环境友好示范工程，预示该项技术在煤化工、页岩油气压裂(钻井)、石油化工、军事野战营地、旅游房车营地和环保污水处理具有广泛的应用市场和很好的经济效益。
发明内容
根据平面层流与垂直流动的交错搅动流态PVFL的扰流机理，本发明提供一种污水处理设备的平垂扰流(PVFL)流态数值模拟优化技术。为实现上述目的，具体技术方案如下：
所述的平垂扰流(PVFL)流态与污水生化处理关键技术和成套工程装备，其污水生化处理的流态数值模拟优化计算方法。具体方法如下：
流体为不可压缩流体，因此反应器的流动模型应选用湍流模型进行模拟。其控制方程组如下:
连续方程：
动量方程：
其中：μeff＝μ+μt
μeff-有效粘滞系数；
μt-湍流粘滞系数；
μ-层流粘滞系数；
式中：Cμ-平均流速梯度产生的湍流动能。
紊动动能k方程
其中，Gk为紊动动能的产生项，
紊动能耗散率ε方程
其中，
式中参数Eij表示时均应变率。以上方程共同组成了标准k-B模型的封闭方程组，模型中的常用参数取值见表2。
表：k-B模型中的常数取值
另外，在壁面附近需要采用标准壁函数对近壁面流速进行修正：
式中：
Up-近壁网格点p上的速度；
U*-摩阻流速；
yp-p点到壁面的距离；
κ-Vonkannan常数，常取0.42；
E-经验常数，常取9.8；
ΔB-糙率函数，其中Cks为粗糙度常数，取0.5；ks +为粗糙高度，常取值为0.009。
附图说明
图1：不同流态组合的水相流态场图
具体实施方式
实施例1：根据PVFL流态机型数值模拟研究，研究机构见图1。

Claims (2)

1.本发明提供一种污水处理设备的平垂扰流(PVFL)流态数值模拟优化技术，具体涉及污水生化处理的流态数值模拟优化技术。
2.如权利要求1所述的污水处理设备的平垂扰流(PVFL)流态数值模拟优化技术，其污水生化处理的流态的数值模拟优化计算方法如下：
流体为不可压缩流体，因此反应器的流动模型应选用湍流模型进行模拟。其控制方程组如下：
连续方程：
动量方程：
其中：μeff＝μ+μt
μeff-有效粘滞系数；
μt-湍流粘滞系数；
μ-层流粘滞系数；
式中：Cμ-平均流速梯度产生的湍流动能。
紊动动能k方程
其中，Gk为紊动动能的产生项，
紊动能耗散率ε方程
其中，
式中参数Eij表示时均应变率。以上方程共同组成了标准k-B模型的封闭方程组，模型中的常用参数取值见表2。
表：k-B模型中的常数取值
另外，在壁面附近需要采用标准壁函数对近壁面流速进行修正：
式中：
Up-近壁网格点p上的速度；
U*-摩阻流速；
yp-p点到壁面的距离；
κ-Vonkarman常数，常取0.42；
E-经验常数，常取9.8；
ΔB-糙率函数，其中Cks为粗糙度常数，取0.5；ks +为粗糙高度，常取值为0.009。
CN201611114214.7A 2016-12-07 2016-12-07 污水处理的平垂扰流（pvfl）流态数值模拟优化技术 Pending CN106844829A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108007681A (zh) * 2017-12-07 2018-05-08 东北大学 一种利用麦克风阵列进行机械故障检测的方法
CN110308302A (zh) * 2019-07-01 2019-10-08 北京大学 一种近壁面流速测量方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101980969A (zh) * 2008-03-28 2011-02-23 西门子水处理技术公司 需氧和厌氧混合废水和污泥处理系统和方法
CN103043784A (zh) * 2013-01-25 2013-04-17 北京大学 一种活性污泥污水处理的多维、多相、多过程耦合模拟方法
CN104346529A (zh) * 2014-10-27 2015-02-11 中国水利水电科学研究院 一种社会水循环排水过程数值模拟方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101980969A (zh) * 2008-03-28 2011-02-23 西门子水处理技术公司 需氧和厌氧混合废水和污泥处理系统和方法
CN103043784A (zh) * 2013-01-25 2013-04-17 北京大学 一种活性污泥污水处理的多维、多相、多过程耦合模拟方法
CN104346529A (zh) * 2014-10-27 2015-02-11 中国水利水电科学研究院 一种社会水循环排水过程数值模拟方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ROWE G T: "Organic carbon cycling in abyssal benthic food chains: Numerical simulations of bioenhancement by sewage sludge", 《JOURNAL OF MARINE SYSTEMS》 *
曾光明, 葛卫华, 秦肖生,等: "污水厂二维沉淀池水流和悬浮物运动数值模拟", 《中国环境科学》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108007681A (zh) * 2017-12-07 2018-05-08 东北大学 一种利用麦克风阵列进行机械故障检测的方法
CN110308302A (zh) * 2019-07-01 2019-10-08 北京大学 一种近壁面流速测量方法及装置

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Application publication date: 20170613