Analysis of fluidization quality of a fluidized bed with staged gas feed for reactions involving gas-volume reduction

The coal as fired, with unidentified characteristics of the coal gangue, was burned on a 300MW circulating fluidized bed unit. The equipment of the coal conveying system was damaged and the boiler operation was unstable. In response to the problems, the coal quality data and storage conditions of the coal were examined and the site was spot-checked to evaluate the coal quality characteristics. At the same time, the typical representative parameters of the coal handling system and boiler operation were selected. According to the analysis of coal quality and coal storage, the coal quality fluctuates greatly and the uniformity of particle size distribution is poor. There is actually the coal gangue with hard texture and hard to grind in the coal pile. The coal gangue will have adverse effects on the fine screening machine, fine crusher and other equipment. After burned this type of coal, the fluidized quality of the boiler bed is degraded to make an impact on the safe and stable operation of the boiler. It is recommended that the coal should be screened and then burned into the furnace to ensure safe and stable operation of the boiler.

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Fluid-dynamic behavior of flaxseed fluidized and spouted bed

Ciência Rural ◽

10.1590/0103-8478cr20160644 ◽

2017 ◽

Vol 47 (10) ◽

Author(s):

Elza Brandão Santana ◽

Maria da Conceição da Costa Valente ◽

Lorena Gomes Corumbá ◽

Elisangela Lima Andrade ◽

Cristiane Maria Leal Costa ◽

...

Keyword(s):

Fluidized Bed ◽

Dynamic Behavior ◽

Seed Treatment ◽

Fluid Dynamic ◽

Seed Processing ◽

Linum Usitatissimum L ◽

Air Temperatures ◽

Physiological Properties ◽

Physiological Quality

ABSTRACT: Processing of particles in a moving bed, such as a fluidized bed or a spouting bed, is commonly used in the operations of drying, coating, and granulation of particulate systems. This process has applications in the chemical, pharmaceutical and, presently, agronomical industries, especially for seed treatment/coating. This research aimed to analyze the fluid-dynamic behavior of fluidized and spouting beds with different air temperatures and loads of flaxseeds (Linum usitatissimum L.), with estimates of the fluid-dynamic parameters correlated to each process. The parameters were compared with the values obtained from classical correlations in the literature, with indications of associated percentages of deviation. Influence of fluid dynamics on the physiological quality of seeds was assessed by germination tests and the germination speed index. An analysis of the results indicated that seed processing was adequate for processing in dynamically active beds; however, temperatures above 50ºC in both beds caused significant reductions in the physiological quality of the seeds. Processing in a fluidized bed presented a smaller reduction of the physiological properties of the flaxseed.

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KARAKTERISTIK FISIKOKIMIA PATI SAGU HASIL PENGERINGAN SECARA FLUIDISASI MENGGUNAKAN ALAT PENGERING CROSS FLOW FLUIDIZED BED BERTENAGA SURYA DAN BIOMASSA

REAKTOR ◽

10.14710/reaktor.13.3.155-164 ◽

2011 ◽

Vol 13 (3) ◽

pp. 155 ◽

Cited By ~ 6

Author(s):

Abadi Jading ◽

Eduard Tethool ◽

Paulus Payung ◽

Sarman Gultom

Keyword(s):

Chemical Composition ◽

Fluidized Bed ◽

Cross Flow ◽

Physicochemical Characteristics ◽

Sago Starch ◽

Drying Time ◽

Fluidized Bed Dryer ◽

Conventional Drying ◽

Fluidized Bed Drying

PHYSICOCHEMICAL CHARACTERISTICS OF SAGO STARCH OBTAINED FROM FLUIDIZED BED DRYING USING SOLAR AND BIOMASS POWERED CROSS FLOW FLUIDIZED BED DRYER. The research aim is to study the comparative quality of sago starch drying results using cross flow fluidized bed dryer powered by solar and biomass in conventional drying, particularly the chemical composition and physicochemical characteristics. This research was conducted through a drying phase of wet sago starch using a cross flow fluidized bed dryer, and drying in conventional as well as dried sago starch quality testing results are drying. The results of this study indicate that dry sago starch which has been drained by means of cross flow fluidized bed dryer has a chemical composition that does not vary much with starch which is dried by conventional drying, so that the dried sago starch produced by the dryer is very good. On the other hand the use of dryers is the more correct because the physicochemical properties of sago starch using a low drying temperature and drying time is short. Tujuan penelitian ini adalah mempelajari perbandingan kualitas pati sagu hasil pengeringan menggunakan alat pengering cross flow fluidized bed bertenaga surya dan biomassa dengan pengeringan secara konvensional, khususnya komposisi kimia dan karakteristik fisikokimia. Penelitian ini dilakukan melalui beberapa tahapan yaitu pengeringan pati sagu basah menggunakan alat pengering cross flow fluidized bed, pengeringan secara konvensional serta pengujian kualitas pati sagu kering hasil pengeringan. Hasil dari penelitian ini menunjukkan bahwa pati sagu kering yang telah dikeringkan dengan alat pengering cross flow fluidized bed memiliki komposisi kimia yang tidak berbeda jauh dengan pati yang dikeringkan dengan cara pengeringan secara konvensional, sehingga pati sagu kering yang dihasilkan oleh alat pengering tersebut sangat baik. Di sisi lain penggunaan alat pengering ini semakin memperbaiki sifat fisikokimia pati sagu sebab menggunakan suhu pengeringan yang rendah dan waktu pengeringan yang singkat. Kata Kunci: pengering unggun terfluidakan; fisikokimia; pati sagu

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The effect of fluidized bed combustion residue on the composition and nutritional quality of food crops for hamsters and rats

Qualitas Plantarum ◽

10.1007/bf01091781 ◽

1985 ◽

Vol 35 (4) ◽

pp. 359-374 ◽

Cited By ~ 2

Author(s):

E. F. Fashandi ◽

R. L. Reid ◽

W. L. Stout ◽

J. L. Hern ◽

O. L. Bennett

Keyword(s):

Fluidized Bed ◽

Nutritional Quality ◽

Food Crops ◽

Fluidized Bed Combustion ◽

Quality Of Food ◽

Combustion Residue

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Stability of Improvements in Exercise Performance and Quality of Life Following Bilateral Lung Volume Reduction Surgery in Severe COPD

CHEST Journal ◽

10.1378/chest.112.4.907 ◽

1997 ◽

Vol 112 (4) ◽

pp. 907-915 ◽

Cited By ~ 47

Author(s):

Francis Cordova ◽

Gerald O'Brien ◽

Satoshi Furukawa ◽

Ann Marie Kuzma ◽

John Travaline ◽

...

Keyword(s):

Quality Of Life ◽

Lung Volume ◽

Exercise Performance ◽

Volume Reduction ◽

Lung Volume Reduction Surgery ◽

Lung Volume Reduction ◽

Bilateral Lung ◽

Severe Copd

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Improved lung function and quality of life following increased elastic recoil after lung volume reduction surgery in emphysema

Respiratory Medicine ◽

10.1016/s0954-6111(98)90513-3 ◽

1998 ◽

Vol 92 (4) ◽

pp. 653-658 ◽

Cited By ~ 13

Author(s):

M. Norman ◽

G. Hillerdal ◽

L. Orre ◽

L. Jorfeldt ◽

F. Larsen ◽

...

Keyword(s):

Quality Of Life ◽

Lung Function ◽

Lung Volume ◽

Volume Reduction ◽

Lung Volume Reduction Surgery ◽

Elastic Recoil ◽

Lung Volume Reduction

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Cow Urine for Enhancement of Biogas Production and Fertilizer Quality of Biogas Slurry

Journal of Scientific Research ◽

10.3329/jsr.v12i1.43031 ◽

2020 ◽

Vol 12 (1) ◽

pp. 135-144

Author(s):

M. R. Fardous ◽

M. S. Nasrin ◽

M. E. Shakil ◽

M. S. Islam ◽

M. A. Hoque ◽

...

Keyword(s):

Physicochemical Properties ◽

Biogas Production ◽

Cow Dung ◽

Biogas Slurry ◽

Volatile Solid ◽

Maximum Conversion ◽

Cow Urine ◽

Experimental Trials ◽

Gas Volume

To explore the potency of cow urine on biogas production and fertilizer quality of the biogas slurries, six experimental trials, T0 (50% CD:50% Water) as control, T1 (10% CD:90% CU), T2 (20% CD:80% CU), T3 (30% CD:70% CU), T4 (40% CD:60% CU) and T5 (50% CD:50% CU) were constructed by mixing cow dung (CD) and cow urine (CU). Cumulative gas volume was estimated for 30 days and the physicochemical properties of the slurries were evaluated. The cumulative gas volume of three trials (T3, T4 and T5) was higher than control (T0) and T5 showed maximum (28% over the control). Moreover, all of the trials except one (T1) showed higher gas yield than control (T0) of which maximum conversion of volatile solid (VS) to gas was obtained in T3. pH of the amended samples were above 7.0 (pH 7.00-7.42). Conductivity of the samples also increases (1.94-13.40 mS cm-1) with the increase in cow urine percentage. With respect to macronutrient (N, P, K) cow urine amended samples can be considered superior to the control one. Moreover, C/N ratio of all the amended samples were below 15 (4.7-14.0) and thus these are suitable for agronomic uses.

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Application of Moldflow in Gas-Assisted Injection Molding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.328-330.1202 ◽

2011 ◽

Vol 328-330 ◽

pp. 1202-1205

Author(s):

Ke Ming Zi ◽

Li Heng Chen

Keyword(s):

Injection Molding ◽

Volume Fraction ◽

Injection Pressure ◽

Processing Technique ◽

Optimum Process ◽

Molding Process ◽

Plastic Processing ◽

Gas Volume Fraction ◽

Gas Volume

Gas-assisted injection molding(GAIM)is a new kind of plastic processing technique. It is one of the most important developments in the injection molding industry. GAIM has many advantages such as lower injection pressure, lower warpage, better surface quality, lower material consumption, and shorten molding cycle time, etc. MPI/Gas module of Moldflow software can be used to simulate the GAIM process to optimize the whole molding process. In this study, the FM new truck interior ceiling handle was analyzed in GAIM process based on the MPI/Gas module. The simulation results showed the gas penetrating time, the contours of plastic layers thickness fraction of the parts and the gas volume fraction changing with time. The results can help technicians to determine the optimum process of the melt injection and the gas injection to ensure the final quality of the parts.

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