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.

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.  

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

Shock loading in biofilters: impact on biodegradation activity distribution and resilience capacity

2009 ◽  
Vol 59 (7) ◽  
pp. 1307-1314 ◽  
Author(s):  
L. Cabrol ◽  
L. Malhautier ◽  
F. Poly ◽  
A. S. Lepeuple ◽  
J. L. Fanlo
Keyword(s):  
High Efficiency ◽  
Complete Removal ◽  
Pilot Scale ◽  
Longitudinal Distribution ◽  
Gaseous Emissions ◽  
Contaminant Removal ◽  
Biomass Density ◽  
Volatile Organic ◽  
Gaseous Stream ◽  
The Impact

A synthetic contaminated gas was generated, representative of gaseous emissions from sludge composting. It was composed of six volatile organic compounds (aldehyde, ketones, esters, sulphur compound) in an ammoniacal matrix. The gaseous stream was purified by biofiltration, in pilot scale biofilters filled with pine bark woodchips as organic carrier for biomass colonization. After reaching a constant high efficiency, with complete removal, the system was disturbed by transient loading shocks. The impact of perturbations was assessed by both performance evaluation (i.e. contaminant removal) and microbial behaviour. The microbial community was analysed in terms of density. The resilience of functional component following a perturbation was evaluated. This work highlighted the longitudinal distribution of both biodegradation activities and biomass density.

scholarly journals Evaluation of Tomato-Based Packing Material for Retention of Ammonia, Nitrous Oxide, Carbon Dioxide and Methane in Gas Phase Biofilters: A Laboratory Study

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 360
Author(s):  
José L. S. Pereira ◽  
Adelaide Perdigão ◽  
Francisco Marques ◽  
Catarina Coelho ◽  
Mariana Mota ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Laboratory Study ◽  
Packing Material ◽  
Control Treatment ◽  
Airflow Rate ◽  
Pig Slurry ◽  
Air Pollution Control ◽  
Gaseous Emissions ◽  
Packing Materials ◽  
Tomato Waste

Biofilters are an effective air pollution control technology to break down gaseous contaminants and produce innocuous end products. This laboratory study aimed to evaluate a biofilter media, mainly composed by tomato waste, as packing material to reduce NH3, N2O, CO2 and CH4 losses from stored pig slurry. Three mixtures of packing materials, with and without oxalic acid, were arranged in treatments, namely: mixture of tomato waste, pine bark and agricultural compost; mixture of tomato waste and rice husk; tomato waste only. A control treatment (no biofilter) was also included. The experiments were conducted using a system of laboratory scale biofilters connected to jars filled with pig slurry and under a constant airflow rate. The gas concentrations were measured for 14 days and the physicochemical of the packing materials were assessed. Results showed that biofilter media mixtures had a potential for NH3 retention ranging from 51 to 77% and the addition of oxalic acid to these biofilters increased NH3 retention to 72–79%. Additionally, the biofilter media mixtures with and without oxalic acid showed a potential retention for CH4 (29–69%) but not for N2O, yet with no impact on the global warming potential. It can be concluded that tomato based biofilters had the potential to reduce gaseous emissions from slurry.

APC Retrofits and Technologies Lower Emissions and Optimize WTE Production

2002 ◽  
Author(s):  
Robin Linton
Keyword(s):  
Pollution Control ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Waste To Energy ◽  
Air Pollution Control ◽  
Fabric Filter ◽  
Maintenance Time ◽  
Media Change ◽  
Extended Filter ◽  
Existing Housing

Air pollution control (APC) systems in waste-to-energy (WTE) plants are facing many of the same challenges that independent power facilities (IPP) have dealt with for years. The most prevalent problems being corrosion and emissions. An IPP plant in the southeastern U.S. illustrates the cause and effect that corrosion played in the plant’s operation, as well as the engineered solution designed to address the issue. The result has performed beyond expectations and lends itself well to the same issues in the WTE plants. The paper also provides information regarding the conversion of the electrostatic precipitator (ESP) to a fabric filter baghouse. By utilizing the existing housing of an ESP, a higher particulate collection efficiency can be achieved at a fraction of the capital cost. Finally, the paper discusses filter changeout to filter bags laminated with highly efficient expanded polytetrafluoroethylene (ePTFE) membrane. This media change addresses the demanding environmental regulations the industry faces, as well as providing benefits to the WTE APC system such as superior cleandown, increased airflows, and extended filter life. The ultimate results of these three technologies can help decrease maintenance time and cost and increase WTE facility production.

scholarly journals Sanitary-and-epidemiological substantiation of the conditions forthelocation of modern low-capacity enterprises for manufacture of asphalt concrete taking into account changes in technology

2020 ◽  
pp. 46-52
Author(s):  
Z.V. Styrta ◽  
◽  
V.M. Mahniuk ◽  
◽  
Keyword(s):  
Asphalt Concrete ◽  
High Efficiency ◽  
Ambient Air ◽  
Town Planning ◽  
The European Union ◽  
Industrial Emissions ◽  
Nature Protection ◽  
Protection Measures ◽  
Protection Zone ◽  
Gas Cleaning

Objective: We performed sanitary-and-epidemiological and ecological-and- hygienic substantiation of the conditions for the location of low-capacity enterprises for the manufacture of asphalt concrete, developed the hygienic criteria for their location taking into account the newest home sanitary, ecological and town-planning legislations and requirements of the European Union directives. Materials and methods: In the article we used results of sanitary-and-epidemiological examination of the project materials and applied bibliosemantic, analytical methods. Results: Тhe sanitary legislation of Ukraine of 1971 and 1996 in the normalization of sanitary-and-protection zone for the above mentioned enterprises was analyzed and compared with the analogous standards in the European countries. According to the results of the scientific sanitary-and-epidemiological examination of the project materials on the substantiation of the sanitary-and-protection zone for home low-capacity enterprises for the manufacture of asphalt concrete (80% of them were put into operation before 1996), the following was established. All investigated enterprises work with the prepared bitumen with the implementation of nature protection measures by means of the use of high-efficiency dust and gas cleaning systems, that shortened the gross emissions of the pollutants in ambient air to a large extent and decreased influence on the environment and adjoining settlement territory, that complies with the requirements of the Directive of 2010/75/EС of European Parliament and Council on the industrial emissions (integrated prevention and control of contamination), November 24, 2010. Implementation of nature protection measures with the use of the high-efficiency dust and gas cleaning systems at the existent low-capacity enterprises for the manufacture of asphalt concrete provided the absence of the exceed of MPC of the specific pollutants at the distances that were 1.5-3.0 times less than standard sanitary-protective zone that was a cause for the substantiation of the use of new approach at the establishment of sanitary-and-protection zone by the calculation method at building of the new or reconstruction of the existent low-capacity enterprises for the manufacture of asphalt concrete.

scholarly journals Environmental impact assessment of industrial enterprises (on the example of objects of category I,II of environmental impact in the Samarkand region)

2021 ◽  
Vol 265 ◽  
pp. 04025
Author(s):  
Tanzila R. Madjidova ◽  
Gulmira S. Boboeva ◽  
Gulmira F. Keldiyarova
Keyword(s):  
Environmental Impact ◽  
High Efficiency ◽  
New Technologies ◽  
Rolling Stock ◽  
Gas Cleaning ◽  
Industrial Enterprises ◽  
Cleaning Equipment ◽  
Key Sectors ◽  
Reduction Of Emissions ◽  
Reduce Emissions

As a result, the implementation of measures to protect the atmosphere (the use of innovative technologies in the introduction of dust and gas cleaning equipment, the conversion of cars to gaseous fuel, the renewal of rolling stock, the implementation of the state program to reduce emissions), the stabilization of the environment is observed. It is necessary to carry out technical re-equipment of key sectors of the economy, the introduction of new technologies, as well as the stabilization and reduction of emissions of pollutants into the atmosphere. It is recommended to take additional measures to ensure that the amount of pollutants released into the atmosphere as a result of the operation of the facility does not exceed the permissible level, to install dust-collecting equipment that captures dust with high efficiency (up to 99.5%).

Six Years Operation Experience With the Cilva Incinerator for Radioactive Waste Treatment

2001 ◽  
Author(s):  
Jan Deckers ◽  
Paul Luycx
Keyword(s):  
Radioactive Waste ◽  
Waste Treatment ◽  
Mission Statement ◽  
Liquid Waste ◽  
Volume Reduction ◽  
Research Centre ◽  
Air Pollution Control ◽  
Nuclear Facilities ◽  
Gas Cleaning ◽  
Set Up

Abstract Since the very beginning of nuclear activities in Belgium, the incineration of radioactive waste was chosen as a suitable technique for achieving an optimal volume reduction of the produced waste quantities. An experimental furnace “Evence Coppée” was built in 1960 for treatment of LLW produced by the Belgian Research Centre (CEN.SCK). Regulatory this furnace has been modified, improved and equipped with additional installations to obtain better combustion conditions and a more efficient gas cleaning system. Based on the 35 years of experience gained by the operation of the “Evence Coppée”, a new industrial nuclear incineration installation was set into operation in May 1995, as a part of the Belgian Centralised Treatment/Conditioning Facility CILVA. Up to the end of 2000, the CILVA incinerator has burnt 703 tons of solid waste and 343 tons of liquid waste. This paper describes the type of waste and the allowable radioactivity, the incineration process, heat recovery and the air pollution control devices. Special attention is given to the operation experience, capacity, volume reduction, chemical and radiological emissions and maintenance. The most important changes which improved safety, reliability and capacity are also mentioned. BELGOPROCESS, a company set up in 1984 at Dessel (Belgium) where a number of nuclear facilities were already installed is specialised in the processing of radioactive waste. It is a subsidiary of ONDRAF/NIRAS, the Belgian Nuclear Waste Management Agency. According to its mission statement, the activities of BELGOPROCESS focus on three areas: treatment, conditioning and interim storage of radioactive waste; decommissioning of shut-down nuclear facilities and cleaning of contaminated buildings and land; operating of storage sites for conditioned radioactive waste.

Update on Spray Dryer Absorber Technology for WTE

2011 ◽  
Author(s):  
Richard Saab ◽  
Michael Sandell ◽  
Vincent Petti ◽  
Gabriel Pacheco
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
High Performance ◽  
Filter Design ◽  
The United States ◽  
Waste To Energy ◽  
Spray Dryer ◽  
Control Technology ◽  
Air Pollution Control ◽  
Fabric Filter

Siemens Environmental Systems & Services (SESS), formerly Wheelabrator Air Pollution Control (WAPC) started up their first SDA on a Municipal Solid Waste (MSW) incinerator in 1987, and now have 50 operating at Waste to Energy (WTE) plants alone. We were pioneers in the development of semi-dry scrubbing technology and are continuously improving it. While Spray Dryer Absorber (SDA) / Fabric Filter (FF) technology is not new, it is still a viable option for multi-pollutant control from many processes including Municipal Solid Waste (MSW) incinerators. It has been the Best Available Control Technology for this industry during the last 25 years. High performance and reliability have been experienced at these facilities across the United States. The simple, proven design of the SDA/FF system has been shown to be effective in acid gas, particulate, heavy metals, and dioxin/furan control. Technology advancements make this technology even more attractive. This paper will provide an update on SDA/FF technology for controlling emissions from MSW incinerators, particularly in relation to performance enhancements, including advancements in SDA dual fluid nozzles and Fabric Filter design. The new generation SESS Fabric Filter enhances system performance by providing lower emissions, lower compressed air consumption, and longer bag life.

scholarly journals Bioenergy II: Scale-Up of the Milena Biomass Gasification Process

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Christiaan M. van der Meijden ◽  
Hubert J. Veringa ◽  
Berend J. Vreugdenhil ◽  
Bram van der Drift
Keyword(s):  
Natural Gas ◽  
High Efficiency ◽  
Scale Up ◽  
Pilot Scale ◽  
Integrated System ◽  
Air Separation ◽  
Gas Cleaning ◽  
Gasification Process ◽  
Wide Range ◽  
First Results

The production of Substitute Natural Gas from biomass (Bio-SNG) is an attractive option to reduce CO2 emissions and replace declining fossil natural gas reserves. The Energy research Center of the Netherlands (ECN) is working on the development of a technology to convert a wide range of biomass into Bio-SNG.The ECN Bio-SNG technology is based on indirect gasification of biomass. The MILENA indirect gasifier is developed to produce a gas, which can be upgraded into SNG with a high efficiency. Because of the indirect heating of the gasification process, no air separation is required. Char and tar are removed from the producer gas and are used as fuel to produce the required heat for the gasification process. The OLGA tar removal technology is used to remove tar and dust from the gas. After gas cleaning, the gas is catalytically converted into a mixture of CH4, CO2 and H2O. After compression and removal of CO2 and H2O, the remaining methane can be used as Bio-SNG.ECN produced the first Bio-SNG in 2004, using a conventional fluidized bed gasifier. The lab-scale MILENA gasifier was built in 2004. The installation is capable of producing approximately 8 Nm3/h methane-rich medium calorific gas with high efficiency. The lab-scale installation has been in operation for more than 1000 hours now and is working fine. Several biomass fuels were tested. Woody biomass appears to be the most suited fuel. The lab-scale gasifier is coupled to lab-scale gas cleaning installations (including OLGA) and a methanation unit. The integrated system was tested during several duration tests.The 30 kWth lab-scale gasifier was scaled up to 800 kWth biomass input. ECN has recently finished the construction of this pilot-scale gasifier, which has been taken into operation in the summer of 2008. First results, using wood as a fuel, show that the gas composition is similar to gas from the lab-scale installation.The pilot scale gasifier will be coupled to the existing pilot scale OLGA gas cleaning unit in 2009. Tests with the pilot-scale MILENA and OLGA will form the basis of a 10 MW MILENA – OLGA – gas engine demonstration plant. This demonstration will be taken into operation in 2012 and will be followed by a large SNG demonstration. 10 MW biomass input is seen as an attractive commercial scale for combined heat and power production from biomass. The scale foreseen for a commercial single-train Bio-SNG production facility is between 50 and 500 MWth. The expected net overall efficiency from wood to Bio-SNG is 70%.

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