THEORETICAL SUBSTANTIATION OF THE USE OF ACTIVATED EXHAUST HOODS FOR DEDUSTING TECHNOLOGICAL TRANSPORT OF WAREHOUSE PREMISES

2021 ◽  
Vol 97 (5) ◽  
pp. 106-114
Author(s):  
A.S. STRONGIN ◽  
Keyword(s):  
Integral Method ◽  
Compressed Air ◽  
Dust Removal ◽  
Food Storage ◽  
Fine Dust ◽  
Electric Cars ◽  
Theoretical Substantiation ◽  
Air Jets ◽  
Conservation Of Momentum ◽  
Source Of Pollution

Strict requirements for microclimate parameters and air cleanliness are imposed on warehouses, especially for food storage. Experience in the operation of storage facilities has shown the need for periodic dust removal of technological vehicles (electric cars and stackers), which is performed during maintenance by blowing compressed air and is accompanied by a strong dusting of the environment. In addition, the formation of fine dust in the pallet storage sections is observed. The elimination of the noted drawbacks is effectively achieved by using activated exhaust hoods, which form weakly turbulent air jets that localize the source of pollution. To assess the effectiveness of the use of activated hoods, an integral method based on the laws of conservation of momentum, mass and energy was used. The example of a representative object illustrates the calculation of the parameters of activated exhaust hoods.

scholarly journals Mn/Ce Oxides Decorated Polyphenylene Sulfide Needle-Punching Fibrous Felts for Dust Removal and Denitration Application

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 168
Author(s):  
Ying Chen ◽  
Hongwei He ◽  
Shaohua Wu ◽  
Xin Ning ◽  
Fuxing Chen ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Filter Material ◽  
Filtration Efficiency ◽  
Polyphenylene Sulfide ◽  
Dust Removal ◽  
Catalyst Loading ◽  
Gas Purification ◽  
Fine Dust ◽  
Fuel Gas ◽  
Needle Punching

Development of a novel filter material is urgently required for replacing the high-cost flue gas purification technology in the simultaneous removal of both fine dust and Nitrogen oxides (NOx). In this study; polyphenylene sulfide (PPS) needle-punching fibrous felts (NPFF) were employed as the filter material to remove the fine dust; and in the meanwhile; Mn and Ce oxides were loaded onto the PPS NPFF as the catalyst for selective catalytic reduction of NOx with NH3. Two different pretreatment methods; i.e., sodium alginate (SA) deposition and plasma treatment; were employed to modify the PPS NPFF before the traditional impregnation and thermal treatment processes during the catalyst loading. The results showed that these two pretreatment methods both afforded the PPS NPFF with the enhanced loading rate and stability of Mn/Ce oxides compared to those without any pretreatments; which were significantly beneficial for the denitration application. Moreover; we found that both SA deposition and plasma pre-treated samples presented excellent dust-removal properties; and the filtration efficiency could reach 100% when the particle size of the fine particulates was above 4 μm. This study demonstrated that our Mn/Ce oxides decorated PPS NPFF have great potential to be applied in the fuel gas purification field; due to their stable structure; handling convenience; and excellent filtration efficiency; as well as high denitration performance.

Filter material treatment methods for fine dust removal and consistent regeneration

2012 ◽  
Vol 48 (1-2) ◽  
pp. 44-49 ◽  
Author(s):  
S. Yu. Panov ◽  
E. V. Arkhangelskaya ◽  
Yu. V. Krasovitskii ◽  
Z. S. Gasanov
Keyword(s):  
Filter Material ◽  
Dust Removal ◽  
Fine Dust ◽  
Treatment Methods

Pore structure and possibility of fine dust removal for bottom ash sand

2020 ◽  
Vol 57 (4) ◽  
pp. 378-384
Author(s):  
Won-Jun Lee ◽  
Jae-Seung Lee ◽  
Daiki Atarashi ◽  
Yong-Hyok Kim ◽  
Seung-Heun Lee
Keyword(s):  
Pore Structure ◽  
Bottom Ash ◽  
Dust Removal ◽  
Fine Dust

scholarly journals CFD Modeling of Ventilation and Dust Flow Behavior in Polishing and the Design of an Innovative Wet Dust Removal System

2020 ◽  
Vol 17 (16) ◽  
pp. 6006
Author(s):  
Jianghai Qian ◽  
Junfeng Wang ◽  
Hailong Liu ◽  
Haojie Xu
Keyword(s):  
Flow Behavior ◽  
Dust Control ◽  
Working Environment ◽  
Dust Removal ◽  
Dust Exposure ◽  
Dust Particles ◽  
Cfd Modeling ◽  
Fine Dust ◽  
Polishing Process ◽  
Removal System

Fine aluminum dust pollution in the polishing process was detected during a field survey. To obtain a fundamental understanding of the airflow patterns and the fine dust dispersion characteristics during a polishing process, computational fluid dynamics simulations were first performed to analyze the data collected in field measurements. The inappropriate ventilation arrangement and lack of effective dust control measures were identified as the main reasons for the high dust exposure levels (in excess of 1000 μg/m3). Simulation results showed that inhalable dust particles (PM10) could be significantly diluted at the operator’s breathing level by adding a supply air inlet above the operating area. Moreover, dry dust collection systems create a risk of aluminum dust explosion accidents. An innovative design of wet dust removal system which could mitigate the occurrence of dust explosions was proposed and then implemented on site. An independent field dust assessment showed that a reduction of fine dust particles up to 95% in the worker’s breathing area and the fine dust in the vents was reduced to 80%. Therefore, the proposed strategies are implemented immediately to address the combustible dust in the polishing working environment and can provide guidance for operators.

scholarly journals Increasing the productivity and accuracy of separation into fractions of a mixture of dissimilar disc-shaped products

2020 ◽  
Vol 22 (93) ◽  
pp. 61-65
Author(s):  
A. L. Bespalov ◽  
I. G. Svidrak
Keyword(s):  
Separation Zone ◽  
Experimental Studies ◽  
Mean Value ◽  
Arithmetic Mean ◽  
Separation Process ◽  
Compressed Air ◽  
Absolute Accuracy ◽  
Air Jets ◽  
Sorting Process ◽  
Small Parts

During collection and counting of coins or tokens, the mixture must be divided into fractions by denomination. Methods of separating coins and existing designs of equipment for separation are considered. It is revealed that the existing designs of vibration devices for sorting disc-shaped parts have low productivity, as well as a fairly large sorting error. A set of elements affecting the performance and efficiency of vibration separators with electromagnetic drives is considered. A new separator design based on a vibrating hopper feeder is proposed. Changed the geometry of the working body and parameters of other elements that affect the accuracy of the separation process and its performance. A prototype of the vibration separator was made according to the project of the proposed design. Experimental studies of the separation process on this separator were carried out to identify the parameters of the accuracy of separation of a mixture of coins with a nominal value of one and two kopecks at different speeds of the process. The research was conducted on two batches of 1000-piece coins with a nominal value of one and two kopecks. Both batches were mixed, the mixture was loaded into the separator hopper in bulk and the separation process was carried out, at the end of which the number of coins of both denominations was determined, which were not in their own separate batches. For each transport speed, fifty measurements were made and the arithmetic mean value of the indicator was determined. It was found that the absolute accuracy of separation on this device is achieved at a speed of vibration transport up to 0.5 m/s. When upgrading the separation zone using compressed air jets, absolute separation accuracy is achieved at a speed of up to 1 m/s. It is established that the new design of the vibration separator proposed by the authors significantly increases the productivity of the sorting process by denominations (diameters) of the coin mixture into fractions with absolute separation accuracy. This device can also be used for sorting small parts or products that have the shape of disks (washers, rondels, buttons, etc.).

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