scholarly journals ENRICHMENT OF FINE COAL SLUDGE BY OIL GRANULATION

2020 ◽  
pp. 42-48
Author(s):  
Vasily I. Murko ◽  
Anton E. Kravchenko ◽  
Alexey N. Bondarenko ◽  
Anatoly N. Zaostrovsky
Keyword(s):  
Fine Coal ◽  
Coal Sludge

scholarly journals Combustion of coal water slurry-technology enabling the achievement of a reduced technical minimum of the boiler

2019 ◽  
Vol 82 ◽  
pp. 01004 ◽  
Author(s):  
Krzysztof Głód ◽  
Janusz Lasek ◽  
Krzysztof Słowik ◽  
Jarosław Zuwała
Keyword(s):  
Coal Slurry ◽  
Research History ◽  
Water Slurry ◽  
Fine Coal ◽  
Coal Sludge ◽  
Coal Water Slurry ◽  
Close Relationship ◽  
Slurry Technology

The idea of combustion of suspended fuels was developed in the 1980s. The largest producer and user of slurry fuels (Coal Water Slurry, CWS) is China [3]. Despite of several decades of CWS research history, investigations are still carried out to improve the parameters of disperse fuels and to improve the combustion of these fuels. The close relationship between the properties of slurry fuels and number of parameters (mainly the type and properties of the coal feedstock) generates the necessity of CWS receipts and determines for what purposes the fuel may be destined. In the case of the use of coal sludge, the resulting slurry allows for the combustion / "disposal" of coal slurry in pulverized boilers. In the case of using better quality fine coal fractions in CWS production, a slurry will be created allowing for achieving the crucial technological goal such as operation of power units with a reduced technical minimum.

Production of fuels on the basis of sewage sludge through conditioning using high calorific value fractions

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Karl-Georg Schmelz ◽  
Anja Reipa ◽  
Hartmut Meyer
Keyword(s):  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Calorific Value ◽  
Fluidised Bed ◽  
Sludge Treatment ◽  
Heating Value ◽  
Fine Coal ◽  
Used Cars ◽  
Plastic Components

Emschergenossenschaft and Lippeverband operate 59 wastewater treatment plants which produce approx. 100,000 Mg TS of sewage sludge each year. Using sludge pressure pipelines, about 60 % of this sludge are transported to the central sludge treatment plant in Bottrop. The digested sludges are conditioned using fine coal and polymers and are dewatered using membrane filters. By adding coal, the heating value of the sludge is raised which enables autothermal combustion of the dewatered sludges in fluidised bed furnaces at the central sludge treatment plant. In order to replace coal, a fossil fuel, as conditioning agent, experiments were conducted using alternative materials with high heating values. The addition of shredder fluff agglomerates proved to be particularly successful. Shredder fluff agglomerates are a residue from the recycling of used cars and are generated in a multistage process (e.g. Volkswagen-SiCon Process) by separating the light shredder fraction (plastic components etc.) from the total shredder fluff. The fibrous material is outstandingly suitable for improving the dewaterability and for sufficiently raising the heating value of the dewatered sludge in order to enable autothermal combustion. Since first experiments showed very positive results, a full-scale long-term test-run will take place in 2007.

Changes of fungal diversity in fine coal gasification slag amendment pig manure composting

2021 ◽  
Vol 325 ◽  
pp. 124703
Author(s):  
Tao Liu ◽  
Mukesh Kumar Awasthi ◽  
Minna Jiao ◽  
Sanjeev Kumar Awasthi ◽  
Shiyi Qin ◽  
...  
Keyword(s):  
Fungal Diversity ◽  
Coal Gasification ◽  
Pig Manure ◽  
Fine Coal ◽  
Coal Gasification Slag

scholarly journals Selective agglomeration of fine coal using a water-in-oil emulsion

2016 ◽  
Vol 110 ◽  
pp. 54-61 ◽  
Author(s):  
Kim van Netten ◽  
Roberto Moreno-Atanasio ◽  
Kevin P. Galvin
Keyword(s):  
Oil Emulsion ◽  
Fine Coal ◽  
Water In Oil Emulsion

Development of a characteristic flotation cleaning index for fine coal

1999 ◽  
Vol 55 (3) ◽  
pp. 231-243 ◽  
Author(s):  
M.K. Mohanty ◽  
R.Q. Honaker ◽  
B. Govindarajan
Keyword(s):  
Fine Coal

Reduction Kinetics of Mill Scale Briquettes by Using A3 Fine Coal as a Reductant

2021 ◽  
Vol 21 (4) ◽  
pp. 2563-2567
Author(s):  
Nguyen Hoang Viet ◽  
Pham Ngoc Dieu Quynh ◽  
Nguyen Thi Hoang Oanh
Keyword(s):  
Reaction Rate ◽  
Reduction Process ◽  
Reduction Reaction ◽  
Reaction Rate Constant ◽  
Reduction Degree ◽  
Furnace Temperature ◽  
Time Duration ◽  
Mill Scale ◽  
Fine Coal ◽  
Kinetics Of

In this work, a mixture of mill scale with 5 wt% molasses as binder was pressed under pressure of 200 MPa to prepare briquettes. The reduction process was performed at the temperature of 1000, 1050, 1100, 1150 and 1200 °C in the bed of A3 fine coal as the reductant. The degree of reduction was evaluated at time duration of 15, 30, 45, 60, 90 and 150 minutes, after the furnace temperature reached the predetermined reduction temperature. The highest reduction degree is 94.7% at the reduction process temperature of 1200 °C. Reaction rate constant (k) increased from 4.63×10-4 to 5.03×10-3 min-1 when the temperature increased from 1000 to 1200 °C. The apparent activation energy of the reduction reaction (Ea) is about 95.6 kJ/mole.

Sign in / Sign up

Export Citation Format

Share Document