Dust emission from wet, low-emission coke quenching process

Coke plants, which produce various types of coke (metallurgical, foundry or heating), at temperatures between 600 and 1200°C, with limited access to oxygen, are major emitters of particulates and gaseous pollutants to air, water and soils. Primarily, the process of wet quenching should be mentioned, as one of the most cumbersome. Atmospheric pollutants include particulates, tar substances, organic pollutants including B(a)P and many others. Pollutants are also formed from the decomposition of water used to quench coke (CO, phenol, HCN, H2S, NH3, cresol) and decomposition of hot coke in the first phase of quenching (CO, H2S, SO2) [1]. The development of the coke oven technology has resulted in the changes made to different types of technological installations, such as the use of baffles in quench towers, the removal of nitrogen oxides by selective NOx reduction, and the introduction of fabric filters for particulates removal. The BAT conclusions for coke plants [2] provide a methodology for the measurement of particulate emission from a wet, low-emission technology using Mohrhauer probes. The conclusions define the emission level for wet quenching process as 25 g/Mgcoke. The conducted research was aimed at verification of the presented method. For two of three quench towers (A and C) the requirements included in the BAT conclusions are not met and emissions amount to 87.34 and 61.35 g/Mgcoke respectively. The lowest particulates emission was recorded on the quench tower B and amounted to 22.5 g/Mgcoke, therefore not exceeding the requirements.

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Thermal-detoxification equipment and utilization of heat from cokebattery smokestack gases

Linnaeus Eco-Tech ◽

10.15626/eco-tech.2005.048 ◽

2019 ◽

pp. 471-478

Author(s):

Ewgen Danilin ◽

Alexander Lobov

Keyword(s):

Electric Power ◽

New Technology ◽

Boiler House ◽

Coke Oven ◽

Flue Gases ◽

Coke Oven Gas ◽

Waste Recovery ◽

Power Stations ◽

Coke Plants ◽

Power Standard

Kotloenergoprom Stock Co. has developed new technology of thermal rendering harmless andwaste recovering of heat of flue gases from coke-oven batteries in one unit.In 2000, Kotloenergoprom Stock Co. had executed the design of the first in the world Unit ofthermal rendering harmless and waste recovering of heat of flue gases from the coke-oven batteryNo. l installed in "Zaporozhkoks" (65 furnaces, H = 7.0 m, V = 41.6 m3).The complex "Coke-oven battery - Unit" operates in the special mode using automatic processcontrol system. Introduction the above Unit in 2002 had ensured: decrease of NOx contents influe gases from coke-oven battery in 1.5+2 times and CO on 90+ I 00 % with providinginternational norms of ejections; rebuming solid carbon inclusions and combustible components(H2, CH4, CmHn) in flue gases; stabilization of hydraulic mode of coke-oven battery operation;non-shock putting coke-oven battery into operation directly to chimney stack in case of scheduledor accident stopping the Unit; waste recovery of heat of flue gases from coke-oven battery inquantity up to 6.0 Gkal/h; producing up to 85 tph of steam with energetic parameters at additionalcombustion of coke-oven gas (without building new chimney stack), that lets to produceadditionally 6 MWt of electric power;Standard scheme of producing heat and electric power at by-product coke plants applying usualboiler houses and power stations is irrational. The more effective is to apply the scheme ofproducing heat and electric power with simultaneous rendering harmless and waste recovery ofheat of flue gases from coke-oven batteries in the special Units using existing chimney stacks ofcoke-oven batteries.Cost of building the Unit is not more than cost of usual boiler house or power station with equalcapacity.

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EMISSION FACTOR ESTABLISHMENT FOR PALM OIL MILL BOILER

Jurnal Teknologi ◽

10.11113/jt.v78.9573 ◽

2016 ◽

Vol 78 (8-3) ◽

Author(s):

Nur H. Hanafi ◽

Mimi H. Hassim ◽

Mohd R. M. Yusuf

Keyword(s):

Palm Oil ◽

Pollution Control ◽

Emission Factor ◽

Combustion Process ◽

Dust Emission ◽

Air Pollution Control ◽

Fresh Fruit Bunch ◽

Particulate Emission ◽

Total Dust ◽

Palm Oil Mill

A study to establish the total particulate emission factor (EFs) from boiler of a palm oil mill plant equipped with a multi-cyclones particulate arrestor was performed and reported in this research. The mill employs a 500 kg steam/ h capacity of water-tube typed boiler and processes 60 tonnes per hour of fresh fruit bunch (FFB). The samples of the dust were collected iso-kinetically using the USEPA method 17 sampling train through a sampling port located after a multidust cyclone unit. Results showed that the total dust generated from the boiler is 62.15 g/s and the calculated total dust emission factor based on the boiler capacity is 7.46 g/kg. Poor combustion process is among the main factor that leads to the high particulate emission. EFs data allows for early prediction of pollutants emission, which subsequently will assist in determining the degree of control and the air pollution control system needed, besides evaluating the effectiveness of the existing pollution control strategies. The establishment of EFs for palm oil mills will definitely bring benefits for a better management of health and safety risks in palm oil mills, now and in the future

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Comparative Study on Various Methods for Measuring Engine Particulate Matter Emissions

10.31224/osf.io/8p4zj ◽

2018 ◽

Author(s):

Z. Gerald Liu ◽

Devin R. Berg ◽

James J. Schauer‡

Keyword(s):

Particulate Matter ◽

Mass Measurement ◽

Chemical Species ◽

Measurement Methods ◽

Particulate Emissions ◽

Engine Exhaust ◽

Particulate Emission ◽

Low Emission ◽

Particulate Matter Emissions ◽

Particulate Mass

Studies have shown that there are a significant number of chemical species present in engine exhaust particulate matter emissions. Additionally, the majority of current world-wide regulatory methods for measuring engine particulate emissions are gravimetrically based. As modern engines produce increasingly lower particulate mass emissions, these methods become less and less stable and have high levels of measurement uncertainty. In this study, a characterization of mass emissions from engines with a range of particulate emission levels was made in order to gain a better understanding of the variability and uncertainty associated with common mass measurement methods, as well as how well these methods compare with each other. Two gravimetric mass measurement methods and a reconstructed mass method were analyzed as part of the present study. The results have shown that each of the mass measurement methods analyzed compare well at higher emission levels, but show significant disparity at the ultra-low emission levels commonly seen from modern diesel engines. Additionally, at ultra-low emission the uncertainty in the measurement becomes large, thus reducing confidence in the accuracy of the measurement. Based upon these findings, it would be difficult to justify a comparison between any two gravimetric measurement methods and it may be more appropriate to perform a reconstruction of the particulate mass due to a lower susceptibility to measurement error.

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Dust distribution at a coal shearer in the face area

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2020-61-0-65-73 ◽

2020 ◽

pp. 65-73

Author(s):

A. S. Kobylkin

Keyword(s):

Air Flow ◽

Dust Emission ◽

Sampling Procedure ◽

Dust Particles ◽

Dust Deposition ◽

Particulate Emission ◽

Face Area ◽

Laboratory Test Results ◽

The Face ◽

Dust Distribution

Compliance with the Federal Code on Safety in Coal Mine, §22, No. 550 as of November 19, 2013 (as edited on January 1, 2020) dictates air dustiness and dust deposition control to be implemented in mines using stationary and mobile facilities. Application procedures of stationary controllers should be science-based and tested to provide reliable information. In particular, the procedures should indicate installation sites for the controllers and dictate revaluation of readings received from the controllers towards the dust explosion prevention in mines. Aimed to develop a framework for such procedures and to revise measurement areas for the movable controllers, dust distribution in roadways was studied. The studies have found out that particulate emission and dust distribution in the face area is complex due to mobility of the source of dust in the coal face area. Characteristics of dust particles govern their behavior in air flow. Thus, it is required to know characteristics of dust particles at the dust emission point to track their travel in roadways. A dust sampling procedure was developed to sample dust at a coal shearer. The data on characteristics of dust particles were also obtained. The mine and laboratory test results were used as the initial and boundary conditions in computational modeling. The mine researches and the modeling show that air flow is split into two parts in longwall. Dust produced by coal cutting by the shearer moves with air flow above the armored face conveyor. These results highlight the importance of taking into account local and head drags when selecting installation sites for controllers of air dust content and dust deposition in coal mines.

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A New Coking Coal Charging Method for 6 m Top-Charged Coke Oven: System Design and Experiment

Applied Sciences ◽

10.3390/app11010033 ◽

2020 ◽

Vol 11 (1) ◽

pp. 33

Author(s):

Ze Zhang ◽

Shuting Zhang

Keyword(s):

Dust Emission ◽

Coke Oven ◽

Dense Phase ◽

Coking Coal ◽

New Device ◽

Controllable Factors ◽

Actual Operation ◽

Feeding Speed ◽

Phase Transport ◽

Accumulation Characteristics

Coking with low moisture coal is an important link of energy conservation and coke quality improvement in the coking industry. Aiming at the problems of dust emission and bad accumulation in the coking chamber during coal charging, a new system of coking coal charged into 6 m top-charge coke oven was studied and designed, in which a cylinder with telescopic and high temperature resistance was used to fill the coking chamber with a dense phase continuous flow. The coal transport characteristics, dust emission, and accumulation characteristics were studied through the actual operation of the equipment. The results found that the matching of spiral feeding speed and cylinder lifting speed had an important influence on the transport characteristics, when moisture was 5%, and the control dense phase transport conditions were—cylinder lifting speed of 0.02 m/s and spiral feeding speed control range of [0.31 m/s, 0.50 m/s]. The new device was found to reduce dust emission by 90% per square meter, compared to the traditional. The influence of controllable factors on the accumulation characteristics of coal was studied, and the essential conditions for optimal repose angle and bulk density were obtained through an orthogonal test, the prediction model of accumulation characteristics was established.

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Numerical study and design strategy for a low emission coke oven system using oxy-fuel combustion of coke oven gas

Journal of Cleaner Production ◽

10.1016/j.jclepro.2019.119656 ◽

2020 ◽

Vol 252 ◽

pp. 119656 ◽

Cited By ~ 2

Author(s):

Zhenxing Li ◽

Qun Yi ◽

Yuke Zhang ◽

Huan Zhou ◽

Yingjie Zhao ◽

...

Keyword(s):

Numerical Study ◽

Coke Oven ◽

Design Strategy ◽

Fuel Combustion ◽

Coke Oven Gas ◽

Low Emission

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A novel system for the abatement of fugitive emissions during charging in a by-product coke oven

Metallurgical Research & Technology ◽

10.1051/metal/2019018 ◽

2019 ◽

Vol 116 (4) ◽

pp. 406

Author(s):

Marco Boscolo ◽

Elio Padoano ◽

Luigi Bregant ◽

Vincenzo Dimastromatteo ◽

Marzio Piller ◽

...

Keyword(s):

Aromatic Compounds ◽

Coke Plant ◽

Coke Oven ◽

Polycyclic Aromatic Compounds ◽

Monitoring Programme ◽

Fugitive Emissions ◽

Legal Limits ◽

Coke Plants ◽

Emission Time ◽

Polycyclic Aromatic

The article presents a study on the measures adopted in an existing coke plant in order to reduce levels of benzo(a)pyrene dispersed in the environment surrounding the facility. The area has been affected by significant levels of pollution from polycyclic aromatic compounds due to the fugitive emissions from the coke oven, which did not comply with the most recent regulation. A monitoring programme was therefore launched in order to support a framework for intervention. Several problems with the battery made it necessary to implement a novel system to collect and abate fugitive emissions during the operations. The monitoring of the fugitive emissions from the coke oven, before, during and after the implementation of the system, has shown a drop of the visible emission time at charging below 30 s, matched by the return of pollution from benzo(a)pyrene in the area below the legal limits (1 ng/Nm3). When compared to the installation costs, these results suggest that the proposed solution can be replicated in other existing by-product coke plants.

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