Effect of Filter Aids on Pressure Drop and Permeability of Two Different Filter Media

2015 ◽  
Vol 1125 ◽  
pp. 245-249 ◽  
Author(s):  
Andenan Nurnadia ◽  
M. Rashid ◽  
S. Hajar ◽  
M.R. Ammar
Keyword(s):  
Pressure Drop ◽  
Flue Gas ◽  
Lower Pressure ◽  
Filter Media ◽  
Gas Cleaning ◽  
Fabric Filter ◽  
Filtration System ◽  
Study Results ◽  
Different Types ◽  
Filter Aids

Abstract. A study on the effect of a newly formulated filter aids onto two different types filter media that are teflon and Ryton was carried out in a laboratory scale filtration system. The filter aids material is a combination of PrekotTM and activated carbon which are commonly used as flue gas cleaning agent respectively. The effect of the filter aids of various combination on pressure drop and permeability across the two filter media under different filtration velocities was investigated in this study. Results showed that ryton presents a lower pressure drop under various combinations of filter aids for different filtration velocities compared to teflon. A lower pressure drop across the fabric filter resulted a higher permeability property of ryton which allows higher volumetric air flow rates passing through it compared to teflon filter. The study suggests that the addition of PrekotTM in the formulation of filter aids significantly affect both pressure drop and permeability of the filter media

PrekotAC AS A NEW FILTER AIDS MATERIAL FOR FABRIC FILTER IN AIR FILTRATION SYSTEM

2016 ◽  
Vol 78 (3-2) ◽  
Author(s):  
S. Hajar ◽  
M. Rashid ◽  
A. Nurnadia ◽  
M. R. Ammar
Keyword(s):  
Coating Material ◽  
Operating Conditions ◽  
Inert Material ◽  
Air Filtration ◽  
Filter Media ◽  
Fabric Filter ◽  
Short Life Span ◽  
Filtration System ◽  
Wear And Tear ◽  
Filter Aids

Fabric filter has a short life span due to wear and tear influenced by the operating conditions of the system. Treatment of fabric filter using pre-coating material is one of the simplest technique to overcome this problem where it works as a filtration aids that will coat a layer of inert material onto the surface of the fabric. Pre-coating acts as a barrier to block and remove undesired particles from gas stream but allowing a uniform air flow passing through the filter media. The morphology of dust cake that accumulated on the surface of the filter media depends on several properties of the particles such as shape and size. Hence, study presents the characterization of a newly formulated filtration aids known as PrekotAC consisting of a different combination of pre-coating material PreKot™ and activated carbon. The aim is to determine the best combination of PrekotAC admixtures as a filtration aids suitable for a fabric filtration system. Various characteristics of the formulated admixtures such as its particle size distribution, bulk density, moisture content as well as its morphology were investigated and presented in this paper.  

PrekotAC as Filter Aids for Efficient Dust Separation in a Fabric Filter

2014 ◽  
Vol 67 (4) ◽  
Author(s):  
S. Hajar ◽  
M. Rashid ◽  
A. Nurnadia ◽  
H. Norelyza ◽  
M. Ammar
Keyword(s):  
High Efficiency ◽  
Size Fraction ◽  
Inert Material ◽  
Air Pollution Control ◽  
Gaseous Emissions ◽  
Gas Cleaning ◽  
Fabric Filter ◽  
Wear And Tear ◽  
Gaseous Stream ◽  
Filter Aids

Fabric filters are extensively used as an air pollution control system for its high efficiency to collect particles from gaseous stream. The system is commonly installed in many incineration plants as the means to control dust and gaseous emissions. Unfortunately, their applications in these facilities are short lived due to wear and tear of the fabric media. This is because the fabric filter is not adequately conditioned before it is put up into service. A simple technique is to apply so called ‘pre-coat’ material to coat a layer of inert material onto the surface of the fabric as a ‘barrier’ for protection as well as to allow a uniform air flow passing through the filter media. In this regard, a newly formulated filter aids material known as PrekotAC, not merely acts as an adsorbent for flue gas cleaning but also an efficient dust separation agent in a fabric filter system. A mixture of PreKotTM:Activated Carbon of 40:60 (%weight) was found to be the most preferable combination with its particle size distribution between 75 and 600μm, which is bigger size fraction than the original materials.

scholarly journals Filter aids influence on pressure drop across a filtration system

2017 ◽  
Vol 206 ◽  
pp. 012054 ◽  
Author(s):  
S Hajar ◽  
M Rashid ◽  
A Nurnadia ◽  
M R Ammar ◽  
C M Hasfalina
Keyword(s):  
Pressure Drop ◽  
Filtration System ◽  
Filter Aids

Heavy Metals and Heat Value in Sewage Sludge

1990 ◽  
Vol 22 (12) ◽  
pp. 85-92 ◽  
Author(s):  
Dieter O. Reimann
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Flue Gas ◽  
Sludge Treatment ◽  
Gas Cleaning ◽  
Different Types ◽  
Heat Value ◽  
Comparative Results ◽  
Treatment And Disposal ◽  
The Right

Of the 50 × 106 Mg of sewage sludge (5% dry solids) produced per year in the FRG, 60% is dumped, 30% used in agriculture or composted, and 10% is combusted. For all the different types of sludge utilization, thermal sludge treatment and disposal or dumping, major problems are created by pollutants in the sludge.There may be serious levels not only of salts and organic pollutants, but also especially of heavy metals.The content of these pollutants causes environmental dangers in soil, plants, groundwater and in the air. For the thermal treatment or disposal of sludge, knowledge of the salt and heavy metal content is important for the choice of the right flue gas cleaning system.Only by this means can hazardous emissions into the air be avoided. The advantage of thermal sludge treatment as opposed to the dumping and utilization systems must be seen in the thermal destruction of the organic pollutants.At the same time, as a large part of the heavy metals are evaporated by the high burning temperature, they are taken up into the flue gas and can be captured by condensation on the filter-ash or in the scrubber water. In the combustion of sludge its heat value is very important, and is dependent on the organic matter and the water content of the sludge, which can be influenced by dewatering systems. Comparative results on heavy metals and heat values for different sorts of sludges have been collected in a great number of investigations.The results of these investigations are presented and should serve as a basis for the prevention of negative environmental influences by the utilization, dumping or burning of sludge.

scholarly journals Performance of PrekotAC Filter Aids on Pressure Drop across Two Different Filter Media

2017 ◽  
Vol 111 ◽  
pp. 02003
Author(s):  
S. Hajar ◽  
M. Rashid ◽  
A. Nurnadia ◽  
N. Masdiana ◽  
M.R. Ammar
Keyword(s):  
Pressure Drop ◽  
Filter Media ◽  
Filter Aids

TURBOSORP®: Emission Limits After 17th BimSchV (German Federal Immission Act) at Lowest Costs in a Simple Dry Process — Comparison of Dry/Semi Dry Processes and Results of Mercury and Dioxin Separation in a One Step Process

2003 ◽  
Author(s):  
H. K. Reissner ◽  
C. Brunner ◽  
K. Ba¨rnthaler
Keyword(s):  
Flue Gas ◽  
Cfd Simulation ◽  
Circulating Fluidized Bed ◽  
Open Hearth ◽  
Open Hearth Furnace ◽  
Gas Cleaning ◽  
Dry Process ◽  
Fabric Filter ◽  
Process Comparison ◽  
Spray Absorption

The TURBOSORP®-process is a dry flue gas cleaning process to remove certain pollutants like SO2, HCl, Hg, heavy metals, dioxins and furans. The main principle of this process is to bring flue gas in an intensive contact with Ca(OH)2, open hearth furnace coke, water and recirculated material in the Turboreactor. The Turboreactor operates as circulating fluidized bed in the manner of fast fluidisation. The gas/solid mixture leaves the Turboreactor at the top and the solids are separated in a fabric filter from the flue gas. More than 99% of the separated solids are recirculated to the Turboreactor and the rest leaves the process as product. Due to the high sorbent recirculation percentage a high sorbent utilization and low stoechiometric rates are reached in the TURBOSORP®-process. Due to the fact to have plants in operation for the spray absorption and for the TURBOSORP® process, a comparison definitely showed advantages for the TURBOSORP® process. Experiences of the plant start up of a TURBOSORP® plant in Poland concerning optimisation in pressure loss and hydrodynamics of the Turboreactor using CFD-Simulation are presented. Results concerning mercury and dioxin separation in our Turbosorp® pilot plant after the refuse incinerator MV Spittelau, Vienna, are discussed.

Effect of Filter Media Structure on Fine Particle Filtration

2013 ◽  
Vol 437 ◽  
pp. 568-571 ◽  
Author(s):  
Yan Zheng ◽  
Ning Mao ◽  
Zhi Ke Lin ◽  
De Qiang Chang ◽  
Jing Xian Liu ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Fine Particle ◽  
Membrane Structure ◽  
Membrane Filter ◽  
Filter Media ◽  
Particle Filtration ◽  
Fabric Filter ◽  
Wide Range ◽  
Woven Structure

Particles come in a wide range of sizes. Fabric filter with different structure shows different filtration performances on fine particle. In the paper, two types of filter media structure, i.e. non-woven structure and membrane structure are compared and studied. It can be seen that the pressure drop of membrane filter is apparently much higher than that of non-woven structure for it owns a density membrane. Membrane structure gives apparently higher efficiency for fine particle than non-woven structure.

TEKNOLOGI PENANGANAN EMISI GAS DARI INSINERATOR SAMPAH KOTA

2019 ◽  
Vol 11 (2) ◽  
Author(s):  
Prasetiyadi Prasetiyadi ◽  
Wiharja Wiharja ◽  
Sri Wahyono
Keyword(s):  
Fly Ash ◽  
Pressure Drop ◽  
Spray Drying ◽  
Flue Gas ◽  
Bag Filter

Proses pembakaran sampah kota melalui insinerator akan menghasilkan uap panas yang bisa dimanfaatkan  untuk membangkitkan energi listrik, akan tetapi pada proses ini juga menghasilkan output berupa flue gas yang didominasi oleh partikel (fly ash) dan gas beracun seperti: HCl, SO2, NOx, HF, Hg, Cd dan Dioxin. Sebelum dibuang ke udara bebas, flue gas tersebut harus diolah agar memenuhi baku mutu lingkungan. Teknologi penanganan partikel dan gas polutan tersedia dan dapat dibuat dengan berbagai kapasitas. Untuk menangani flue gas dari insinerator sampah digunakan Quencher untuk menekan laju pembentukan kembali dioksin dan furan setelah proses pembakaran,  Spray Drying Absorption (SDA) untuk mengikat gas asam dan  logam berat serta bag filter untuk menangkap partikel. Selain itu digunakan ID Fan dan Cerobong Asap untuk pengatasi pressure drop yang terjadi akibat pengoperasian peralatan APC dan melepas ke udara.

scholarly journals Quality assessment of gas produced from different types of biomass pellets in gasification process

2019 ◽  
Vol 38 (2) ◽  
pp. 406-416 ◽  
Author(s):  
Marcel Mikeska ◽  
Jan Najser ◽  
Václav Peer ◽  
Jaroslav Frantík ◽  
Jan Kielar
Keyword(s):  
Gas Turbines ◽  
Combustion Engine ◽  
Calorific Value ◽  
Internal Combustion ◽  
Combustion Gas ◽  
Gas Cleaning ◽  
Gasification Process ◽  
Different Types ◽  
Before And After ◽  
Cleaning Technology

Gas from the gasification of pellets made from renewable sources of energy or from lower-quality fuels often contains a number of pollutants. This may cause technical difficulties during the gas use in internal combustion gas engines used for energy and heat cogeneration. Therefore, an adequate system of gas cleaning must be selected. In line with such requirements, this paper focuses on the characterization and comparison of gases produced from different types of biomass during gasification. The biomass tested was wood, straw, and hay pellets. The paper gives a detailed description and evaluation of the measurements from a fix-bed gasifier for the properties of the produced gases, raw fuels, tar composition, and its particle content before and after the cleaning process. The results of elemental composition, net calorific value, moisture, and ash content show that the cleaned gases are suitable for internal combustion engine-based cogeneration systems, but unsuitable for gas turbines, where a different cleaning technology would be needed.

scholarly journals Highly efficient reusable superhydrophobic sponge prepared by a facile, simple and cost effective biomimetic bonding method for oil absorption

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiaqi Wang ◽  
Yan Chen ◽  
Qinyao Xu ◽  
Miaomiao Cai ◽  
Qian Shi ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Absorption Capacity ◽  
Oil Absorption ◽  
Water Contact ◽  
Water Separation ◽  
Highly Efficient ◽  
Study Results ◽  
Different Types ◽  
Modification Method ◽  
Bonding Method

AbstractSuperhydrophobic sponges have considerable potential for oil/water separation. Most of the methods used for superhydrophobic modification of sponges require toxic or harmful solvents, which have the drawbacks of hazardous to environment, expensive, and complex to utilize. Moreover, the hydrophobic layer on the surface of sponge is often easily destroyed. In this paper, a highly efficient superhydrophobic sponge with excellent reusability was developed by using a facile, simple and environmentally friendly dopamine biomimetic bonding method. Different types of sponges, such as melamine, polyethylene or polyurethane sponge wastes, were used as raw materials to prepare superhydrophobic sponges, which possess the advantages of inexpensive and abundant. The effects of different dopamine polymerization time and different hydrophobic agent dosage on the hydrophobicity and oil absorption capacity of melamine sponges were optimized. The study results showed that the water contact angle of the superhydrophobic sponge could reach 153° with excellent organic solvent absorption capacity of 165.9 g/g. Furthermore, the superhydrophobic sponge retained approximately 92.1% of its initial absorption capacity after 35 reutilization cycles. More importantly, the dopamine biomimetic bonding superhydrophobic modification method can be used for different types of sponges. Therefore, a universally applicable, facile, simple and environmentally friendly superhydrophobic modification method for sponges was developed.

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