具有两个再生过程的水网络设计

发布时间：2018-06-16 02:35

本文选题：设计 + 再生单元　；参考：《河北工业大学》2015年硕士论文

【摘要】：随着社会的发展,对水的需求量越来越大,水污染也越来越严重,水网络集成技术作为一项很重要的节水减排技术,越来越受到人们的关注。较只考虑回用的用水系统,在水网络中引入再生回用/循环,可以有效地减少新鲜水消耗量和废水排放量。本文主要研究含有再生处理单元的水网络设计,主要内容有以下几点:第一章:对课题研究背景和主要研究内容作了简要论述,并简要回顾了水网络的设计方法。第二章:在本章中引入两个再生处理单元,并简要介绍了处理单元的构成,并引入了串联模型和并联模型来描述网络结构。设计过程主要有以下几步:(1)估算两个再生处理单元的再生浓度初值。(2)将源水流分配给各需求水流。(3)得到迭代完成后两股再生水流的再生浓度值。(4)通过比较相邻两次迭代两股再生水流的浓度和流量值确定迭代是否收敛。第三章:本章用文献中的迭代法设计多杂质含单个再生处理单元水网络,作为第四章含两个再生处理单元的水网络设计的基础。第四章:本章结合浓度势的概念和迭代方法,给出了多杂质含两个再生处理单元水网络的详细设计方法。为了启动迭代计算,分别给出了在串联模型和并联模型下每股再生水流的初值的详细估算方法。运用浓度势的概念确定各过程的执行顺序,并将源水流分配给各需求水流。迭代完成之后,基于剩余源水流的浓度势值确定两股再生水流的组成,从而得到两股再生水流的浓度。第五章:本章提出了一个新的图形处理方法。对于文献中的方法,不能处理再生水浓度大于次低需求水流浓度的情况。在本章提出的方法中,所有用水过程被分为三组:只使用新鲜水的过程,用新鲜水和再生水的过程和其它过程。通过分析三组过程之间的联系,得到了新的图形处理方法。该方法能够处理再生水流浓度大于次低需求水流浓度的情况,从而得到用水过程的再生水夹点、新鲜水和再生水流的目标值。
[Abstract]:With the development of society, the demand for water is increasing and the water pollution is becoming more and more serious. As an important water-saving and emission-reducing technology, water network integration technology has attracted more and more attention. Compared with the water system which only considers reuse, it can effectively reduce the consumption of fresh water and the discharge of wastewater by introducing regenerative reuse / recycling into the water network. This paper mainly studies the design of water network with regenerative treatment unit. The main contents are as follows: chapter 1: the research background and main research contents are briefly discussed, and the design method of water network is briefly reviewed. Chapter 2: in this chapter, two regenerative processing units are introduced, and the structure of the processing units is briefly introduced, and a series model and a parallel model are introduced to describe the network structure. The design process consists of the following steps: 1) estimating the initial value of regeneration concentration of two regeneration treatment units. (2) distributing the source water flow to each demand flow. 3) getting the regeneration concentration value of the two streams of recycled water flow after iteration. 4) by comparing the two adjacent two streams, the reclaimed concentration value of the two reclaimed water streams is obtained by comparing the two adjacent two streams. The concentration and flow rate of two streams of regenerated water flow are determined to determine the convergence of the iteration. Chapter 3: in this chapter, the iterative method is used to design the water network with multiple impurities containing a single regenerative treatment unit, which is the basis of the design of the water network with two regenerative treatment units in chapter 4. Chapter 4: combining the concept of concentration potential and the iterative method, a detailed design method of water network with two regenerative treatment units with multiple impurity is given in this chapter. In order to start the iterative calculation, the detailed estimation methods of the initial values of the reclaimed water flow per share under the series model and the parallel model are given respectively. The concept of concentration potential is used to determine the sequence of execution of each process, and the source flow is allocated to each demand flow. After the iteration is completed, the composition of two reclaimed water streams is determined based on the concentration potential value of the residual source flow, and the concentration of the two reclaimed water flows is obtained. Chapter 5: this chapter proposes a new graphic processing method. For the methods mentioned in the literature, the reclaimed water concentration is larger than the secondary demand water concentration. In the method proposed in this chapter, all water use processes are divided into three groups: the process using only fresh water, the process of using fresh water and reclaimed water and other processes. By analyzing the relationship between the three groups of processes, a new graphic processing method is obtained. This method can deal with the situation that the reclaimed water concentration is higher than the secondary low demand water concentration, thus the reclaimed water pinch point, the target value of fresh water and reclaimed water flow can be obtained.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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