Optimal Synthesis of Water Networks for Addressing High-Concentration Wastewater in Coal-Based Chemical Plants

Zhu, Qiping; Zhang, Bingjian; Chen, Qinglin; Pan, Ming; Ren, Jingzheng; He, Chang

doi:10.1021/acssuschemeng.7b02758

Cited by 13 publications

(7 citation statements)

References 33 publications

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“…12 On the other hand, a multistep wastewater treatment design within a source− regeneration−sink superstructure was proposed to synthesize water networks in a coal-based chemical plant. 13 Regarding the optimal allocation of resources among several stakeholders, different studies have been proposed. However, fairness schemes have been recently used to address this issue in different types of systems.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Here, significant advantages (lower cost and water consumption) of this network compared with the water network with one-stage regeneration recycling were found . On the other hand, a multistep wastewater treatment design within a source–regeneration–sink superstructure was proposed to synthesize water networks in a coal-based chemical plant …”

Section: Introductionmentioning

confidence: 99%

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Optimal Design of Water Networks in Eco-Industrial Parks Incorporating a Fairness Approach

Cruz-Avilés

Munguía-López

Ponce-Ortega

2021

Ind. Eng. Chem. Res.

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Water is an essential resource that is used intensively in industrial processes. Recently, eco-industrial parks have become an interesting alterative to reduce and optimize water consumption through reuse and recycling networks. In this work, a new approach is proposed for the optimal design of water networks in eco-industrial parks that for the first time considers fair distribution schemes among the different involved users. The synthesis of water networks includes the recycling and reusing of water by treating it through property interceptors. The total cost of each plant considers treatment, piping and pumping costs, and the cost of the required fresh sources. The incorporation of three different fairness schemes (social welfare, Rawlsian welfare, and Nash) is proposed. Mathematical models are proposed to find the best distribution of resources in a scarcity scheme. The presented approach is general and can be useful for different case studies. However, in this work, we address three case studies to illustrate the applicability of the model. Furthermore, different trends can be observed depending on the analyzed case study.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal Design of Water Networks in Eco-Industrial Parks Incorporating a Fairness Approach

Cruz-Avilés

Munguía-López

Ponce-Ortega

2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…The optimization of practical industrial water networks has been widely addressed, such as in catalyst factories, chemical plants, refineries, semiconductor factories, papermaking factories, poly(vinyl chloride) plants, and coal-based chemical complexes . However, little research has been conducted on the optimization of a water system for a phosphoric acid plant.…”

Section: Introductionmentioning

confidence: 99%

“…36 The optimization of practical industrial water networks has been widely addressed, such as in catalyst factories, 37 chemical plants, 38 refineries, 39 semiconductor factories, 40 papermaking factories, 41 poly(vinyl chloride) plants, 42 and coal-based chemical complexes. 43 However, little research has been conducted on the optimization of a water system for a phosphoric acid plant. Besides, different from the processes for refinery and coal-based chemical plants, most process feed and effluent streams are aqueous phase or thick liquids for wetprocess phosphoric acid production.…”

Section: Introductionmentioning

confidence: 99%

Water–Phosphorus Nexus for Wet-Process Phosphoric Acid Production

Feng

Deng

2018

Ind. Eng. Chem. Res.

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The water−phosphorus nexus problem for wet-process phosphoric acid production is first addressed in this article. A systematic methodology for water system optimization and water−phosphorus nexus analysis is proposed. On the basis of the preliminary process flowsheet and water flow rate balance, the potential water sources and sinks as well as the key component can be extracted. The mathematical model for the water system optimization integrated with water flow rate balance is presented. The process flowsheet can be improved according to the optimized water system. The flow rate of fresh water is reduced from 1803.98 t/h (preliminary design) to 160.98 t/h (improved design). The utilization efficiencies of the phosphorus element (calculated as P 2 O 5 ) are calculated for the preliminary and improved designs. Because the process for wet-process phosphoric acid production is mostly in the aqueous phase, the utilization efficiency of the phosphorus element is increased from 94.22% (preliminary design) to 98.76% (improved design) due to the reuse and recycling of water stream with the phosphorus element. Water minimization and phosphorus recovery can be achieved simultaneously. The additional annualized profit for the improved design reaches 248.8 × 10 6 CNY/a, which is a great benefit for the production plant.

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“…44 The approaches of water system optimization have been applied for the optimization of practical industrial water networks, such as catalyst plant, 45 chemical plant, 46 refinery plant, 14,25,47 semiconductor plant, 48 papermaking plant, 49 polyvinyl chloride manufacturing process 50 and coal-based chemical plant. 51 However, the types of water are simply classified into fresh water, regenerated water and wastewater in previous literature, as shown in Figure 1a. Huang et al 13 categorized the water sources into primary water (so-called fresh water) and secondary water (i.e., effluent of water-using process).…”

Section: ■ Introductionmentioning

confidence: 99%

Deciphering Refinery Water System Design and Optimization: Superstructure and Generalized Mathematical Model

Deng

Jiang

Feng

2018

ACS Sustainable Chem. Eng.

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The up-to-date approaches to optimizing water systems only include fresh water, regenerated water and wastewater and ignore other types of water in refinery, i.e., desalted water, deaerated water, circulated cooling water, steam with different pressure levels and condensate water. Therefore, the existing mathematical model for water system optimizaiton is not directly applicable for the optimization of practical refinery water systems. To overcome the limitation and bridge the theory and application, we first presented a generalized model of water-using processes including multiple types of water and a general superstructure for the optimization of refinery water system. The superstructure consists of water-using processes including multiple types of water in the main production units (i.e., crude oil distillation, fluid catalytic cracking), water pretreatment systems (i.e., fresh water station, desalted water station, steam power station) and wastewater treatment system. The flow rate balance equations for those components of a refinery water system and the correlation for all types of water are formulated. The replacement ratio of altered type of water is introduced in the flow rate balance equations for water reuse/recycling and it avoids the imprecise data extraction of limiting water quality for the inlets of water-using processes. We presented two mathematical models with different objective functions (minimum flow rate of water resource (Scenario 1) and minimum partial annualized cost (Scenario 2)). The proposed models are applied for the optimization of the water system of a large-scale refinery in China. Results show that the water system with a minimum flow rate of water source can be obtained in Scenario 1. In Scenario 2, the profit of water conversation for five strategies cannot offset the investment cost of added pipelines, and their actual replacement ratios are zero. It leads to an economic and simpler water system with slightly higher flow rate of water resources.

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Optimal Synthesis of Water Networks for Addressing High-Concentration Wastewater in Coal-Based Chemical Plants

Cited by 13 publications

References 33 publications

Optimal Design of Water Networks in Eco-Industrial Parks Incorporating a Fairness Approach

Optimal Design of Water Networks in Eco-Industrial Parks Incorporating a Fairness Approach

Water–Phosphorus Nexus for Wet-Process Phosphoric Acid Production

Deciphering Refinery Water System Design and Optimization: Superstructure and Generalized Mathematical Model

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