Pilot-scale study on flue gas moisture recovery in a coal-fired power plant

Cheng, Chao; Liang, Dehua; Zhang, Yuntao; Zhang, Heng; Chen, Haiping; Gao, Dan

doi:10.1016/j.seppur.2020.117254

Cited by 34 publications

(2 citation statements)

References 36 publications

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“…Thirdly, pilot-scale studies have also been carried out with up to 50,000 membrane bundles with different configurations [ 42 , 44 , 46 ]. Many systematic experimental and numerical studies have shown that staggered configuration of membrane bundles have a higher Nusselt number and hence better TMC performance.…”

Section: Transport Membrane Condensersmentioning

confidence: 99%

Transport Membrane Condenser Heat Exchangers to Break the Water-Energy Nexus—A Critical Review

Kim

Drioli

2020

Membranes

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Under the notion of water-energy nexus, the unsustainable use of water in power plants has been largely accepted in silence. Moreover, the evaporated water from power plants acts as a primary nucleation source of particulate matter (PM), rendering significant air pollution and adverse health issues. With the emergence of membrane-based dehydration processes such as vapor permeation membrane, membrane condenser, and transport membrane condenser, it is now possible to capture and recycle the evaporated water. Particularly, the concept of transport membrane condensers (TMCs), also known as membrane heat exchangers, has attracted a lot of attention among the membrane community. A TMC combines the advantages of heat exchangers and membranes, and it offers a unique tool to control the transfer of both mass and energy. In this review, recent progress on TMC technology was critically assessed. The effects of TMC process parameters and membrane properties on the dehydration efficiencies were analyzed. The peculiar concept of capillary condensation and its impact on TMC performance were also discussed. The main conclusion of this review was that TMC technology, although promising, will only be competitive when the recovered water quality is high and/or the recovered energy has some energetic value (water temperature above 50 ∘C).

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Section: Transport Membrane Condensersmentioning

confidence: 99%

Transport Membrane Condenser Heat Exchangers to Break the Water-Energy Nexus—A Critical Review

Kim

Drioli

2020

Membranes

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“…In November 2015, the US Environmental Protection Agency issued emission limited guidelines for the steam power generation industry to strictly control water resource emissions from coal-fired power plants [4]. At present, wet limestone-gypsum flue gas desulfurization (FGD) technology is the most commonly used technology in coal-fired power plants in China [5,6]. In this technology, heavy metals, Cl − and SO 4 2− in coal are constantly enriched in the desulfurization slurry, leading to the decrease of desulfurization efficiency and serious corrosion of equipment, so it is necessary to discharge this part of FGD wastewater regularly [7].…”

Section: Introductionmentioning

confidence: 99%

Application of Submerged Ultrafiltration in Pretreatment of Flue Gas Desulfurization Wastewater

Zhang¹,

Wang²,

Huang³

et al. 2022

Energy Engineering

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Nowadays, the zero liquid discharge of flue gas desulfurization (FGD) wastewater from coal-fired units has attracted the attention of all countries in the world. The pretreatment methods generally have the problems of high operation cost, small treatment capacity, and poor flexibility. However, the membrane method can avoid the above problems.In the current research, it has not been found that someone directly uses submerged ultrafiltration to pretreat FGD wastewater. Therefore, this paper innovatively proposed to directly use ceramic ultrafiltration membrane to treat FGD wastewater, which can ensure effluent quality and improve the flexibility of the pretreatment system. In this paper, the performance of submerged ultrafiltration membrane for the filtration of FGD wastewater from a power plant was studied to optimize the filtration performance and improve the effluent quality. The effects of operating parameters such as membrane permeate flux, aeration rate and filtration/backwashing time combination on the membrane performance were studied. The results showed that when the filtration/backwashing time combination was 15 min/30 s, with the increased in permeate flux from 55 L/(m 2 •h) to 100 L/(m 2 •h), the steady transmembrane pressure (TMP) increased from 39 kPa to 70 kPa, and the fouling rate increased significantly from 4.5 kPa/h to 7.3 kPa/h; When the aeration rate increased from 10 m 3 /(m 2 •h) to 30 m 3 /(m 2 •h), the membrane pollution was much reduced. Excessive aeration rate cannot further alleviate the membrane pollution, but also brought greater energy consumption; Increasing backwashing time can effectively inhibit the formation of gel layer on the surface of the membrane and prolong the initial stage of low-pressure operation; The rejection of suspended solids (SS) and turbidity of the equipment studied in this paper can reach more than 99% under various working conditions, which can satisfy the water quality requirements of the subsequent steps. The submerged ultrafiltration membrane was suitable for the pretreatment of FGD wastewater because it can ensure the quality of permeate under the premise of long-term operation.

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CO2 regeneration energy requirement of carbon capture process with an enhanced waste heat recovery from stripped gas by advanced transport membrane condenser

Yang

Cui

et al. 2022

Applied Energy

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Pilot-scale study on flue gas moisture recovery in a coal-fired power plant

Cited by 34 publications

References 36 publications

Transport Membrane Condenser Heat Exchangers to Break the Water-Energy Nexus—A Critical Review

Transport Membrane Condenser Heat Exchangers to Break the Water-Energy Nexus—A Critical Review

Application of Submerged Ultrafiltration in Pretreatment of Flue Gas Desulfurization Wastewater

CO2 regeneration energy requirement of carbon capture process with an enhanced waste heat recovery from stripped gas by advanced transport membrane condenser

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