Cleaning Of Equipment Research Articles

SG-APSIC1159: Control of hospital-acquired carbapenemase-producing carbapenem-resistant Enterobacteriaceae colonization: A descriptive study

Objectives: Carbapenemase-producing carbapenem-resistant Enterobacteriaceae (CP-CRE) are nosocomial pathogens, and control of CP-CRE transmission is one of the most important infection control issues healthcare organizations face today. Increasing colonization acquisition and clinical infections of CP-CRE occurred in our institution in 2019. In this observational study, we monitored CP-CRE acquisition following implementation of multimodal control measures, and we describe the impact of this intervention on clinical infections. Methods: Increased hospital-acquired CP-CRE colonization and clinical infections were observed in early 2019. Increased CP-CRE surveillance was implemented to include CP-CRE contacts, patients with lengths of stay >7 days, patients with a recent history of hospitalization in other hospitals, and renal dialysis patients. The following interventions were also implemented: (1) isolation or placing CP-CRE patients in cohorts in a designated multidrug-resistant organism (MDRO) ward; (2) emphasis on hand hygiene and contact precautions; (3) mandatory use of gown and gloves for predefined ‘high-risk’ nursing activities, including diaper changing, toilet assistance, wound dressing, and handling urine or stool; (4) enhanced environmental and equipment cleaning; (5) regular audit and feedback regarding compliance; and (6) weekly feedback on ward-level CP-CRE acquisition. CP-CRE colonization cases and clinical infections were tracked by infection prevention and control nurses. Results: The hospital-acquired CP-CRE colonization rate was 4.39 per 10,000 patient days in 2019; it decreased slightly to 3.61 in 2020 and remained steady at 3.77 in 2021. The predominant CP-CRE genes were NDM, OXA-48–like, and KPC. There were 12 hospital-acquired CP-CRE infections in 2019, a rate of 0.37 per 10,000 patient days. This incidence decreased to 6 infections in 2020 and 3 infections in 2021, with corresponding infection rates of 0.19 and 0.09 per 10,000 patient days, respectively. Conclusions: Control of CP-CRE remains extremely challenging in hospitals with multibed open wards. A bundle approach to infection control showed a gradual reduction in CP-CRE cases, with a significant impact on the prevention of clinical infections.

Effectiveness of Cleaning and Sanitation of Stable Environment and Riding Equipment Following Contamination With Streptococcus equi Subsp. equi.

Streptococcus equi subsp. equi (S. equi) is transmitted via contact with infected horses or fomites such as equipment or surfaces of the stable environment. Effective cleaning and sanitation is essential to minimize risk of fomite-associated infections. This study assessed the effectiveness of cleaning and sanitation of experimentally S. equi contaminated materials and equipment found in stables. Wood, concrete, plastic, leather halters, leather gloves and polyester webbing halters were inoculated with a 24-hour culture S. equi laboratory strain. In addition, selected materials were inoculated with a clinical strain of S. equi. Three days post inoculation all materials were sampled for retention of viable S. equi and a subset of each material was cleaned and sanitized. After an additional 2 days all treated and untreated materials were sampled for continued retention of viable S. equi. Separate subsets of contaminated polyester halter material were washed at 40°C with or without drying at 70°C, or washed at 60°C. After cleaning and sanitation, all samples except polyester halters were culture negative. Even before cleaning and sanitation leather appears to poorly support survival of S. equi. After washing at 40°C and tumble drying, 14 of 16 halters were culture positive, however culture negative when washed at 60°C. Routine cleaning and sanitation of fomites contaminated with S. equi was generally effective to eliminate viable bacteria. However, survival between materials and strains differed, with leather poorly permissive to S. equi survival even without cleaning, whereas polyester webbing halters retained viable S. equi even after washing at temperatures of 40°C.

Assessment of Changes in the Abrasiveness of Solid Particles in Hydraulic Mixtures Pumped with ESPs

The statistics of using downhole electric submersible pump (ESP) units in the oil fields of Eurasia show that hydroabrasive wear is a common cause of ESP emergency failures. The authors of this study theoretically and experimentally investigated the peculiarities of water–abrasive wear of ESP components. The research methodology and construction of the laboratory bench are described, and the results of experimental studies of determination of changes in the abrasivity index of impurity particles contained in the mixture pumped with the working stages of an ESP section are given. It is shown that large particles of mechanical impurities in contact with the metal of the working stages are subjected to intensive grinding of up to 0.25…0.3 mm; after that, particle size remains practically unchanged. An increased abrasiveness index of mechanical impurities causes an increase in the intensity of wear of interstage seals along the flow of a water–abrasive mixture (from the inlet to the outlet of the pumping section). Based on the obtained results, recommendations for selection of devices for formation-fluid cleaning during development and operation of oil wells are given. The relevance of work on improving the design of interstage seals of ESP units is substantiated.

Exceptionally clean single-electron transistors from solutions of molecular graphene nanoribbons

Only single-electron transistors with a certain level of cleanliness, where all states can be properly accessed, can be used for quantum experiments. To reveal their exceptional properties, carbon nanomaterials need to be stripped down to a single element: graphene has been exfoliated into a single sheet, and carbon nanotubes can reveal their vibrational, spin and quantum coherence properties only after being suspended across trenches1–3. Molecular graphene nanoribbons4–6 now provide carbon nanostructures with single-atom precision but suffer from poor solubility, similar to carbon nanotubes. Here we demonstrate the massive enhancement of the solubility of graphene nanoribbons by edge functionalization, to yield ultra-clean transport devices with sharp single-electron features. Strong electron–vibron coupling leads to a prominent Franck–Condon blockade, and the atomic definition of the edges allows identifying the associated transverse bending mode. These results demonstrate how molecular graphene can yield exceptionally clean electronic devices directly from solution. The sharpness of the electronic features opens a path to the exploitation of spin and vibrational properties in atomically precise graphene nanostructures.

SG-APSIC1122: Observational study of handwashing sink activities in the inpatient setting

Objectives: The use of handwashing sinks for activities other than hand hygiene (HH) is associated with higher rates of β-lactamase–producing Enterobacteriaceae. However, little has been published about the handwashing sink activities in Singapore hospitals. We explored the handwashing sink activities in a tertiary-care hospital in Singapore. Methods: Five trained shadow observers conducted this observational study between December 18 and 21, 2018 (6 hours per day: 07:00–09:00, 09:30–11:30, and 12:30–14:30) in acute-care general wards. We divided the handwashing sink activities by healthcare workers (HCWs) and non-HCWs (ie, visitors, caregivers, and relatives) and by HH- and non–HH-related activities. We used Stata version 15 software for the analysis. The study was approved by the Institutional Review Board of the National Healthcare Group, Singapore (DSRB no. 2020/01257). Results: In total, 657 handwashing sink activities were recorded [HCWs, 475 (72.3%) and non-HCWs, 182 (27.7%)]. Of the 475 HCW handwashing sink activities, 451 (94.9%) were HH-related, 10 (2.1%) were for patient nutrition, 7 (1.5%) were for environmental care, 6 (1.3%) were for medical equipment cleaning, and 1 (0.2%) was patient personal-item cleaning. Of the 182 handwashing sink activities by non-HCWs, 117 (64.3%) were HH related, 30 (16.5%) were for patient nutrition, 21 (11.5%) were for personal hygiene, 14 (7.7%) were patient personal-item cleaning. The distribution of handwashing sink activities differed significantly (P < .01) between HCWs and non-HCWs. The odds of non–HH-related handwashing sink activities among non-HCWs was 10× higher than among HCWs (OR, 10.44; 95% CI, 5.98–18.23; P < .01). Conclusions: Handwashing sinks use for non–HH-related activities is higher among non-HCWs than HCWs. Further studies are needed to understand the impact of non-HH handwashing sink activities on nosocomial infections and ways to reduce them.

Occupational health and safety status of waste and sanitation workers: A qualitative exploration during the COVID-19 pandemic across Bangladesh

In Bangladesh, cities produce huge volumes of solid waste, sewage, and greywater with limited resources to manage it. Waste and sanitation workers, key players in managing waste, are continuously exposed to different health hazards in their work due to lack of occupational safety and basic protections. This vulnerability has been exacerbated by the COVID-19 Pandemic. Focusing on workers’ experiences and everyday working realities, this study sought to assess the organizational capacity, gaps, and challenges of local waste management authorities during COVID-19. It also sought to deepen understanding of job arrangements, occupational safety, hygiene knowledge, and practices of these waste workers at their workplace. A qualitative study was conducted consisting of 61 key informant interviews with seven categories of local officials and 50 in-depth interviews with five categories of waste and sanitation workers in 10 cities of Bangladesh. An inductive content analysis approach was adopted. The results showed that COVID-19 had aggravated the existing waste management challenges and imposed severe health risks on waste workers. Respective conservancy departments lagged behind due to lack of safe cleaning methods and equipment, and limited funds for waste worker training, which ultimately led to poor occupational safety for workers. This vulnerable worker group lacked basic job facilities, received poor payment and insufficient protective equipment, and rarely had any health support from their employers. Also, they were not provided with an adequate understanding of occupational safety and health hygiene; and no appropriate handwashing facilities at their workplace to tackle infectious diseases like COVID-19. The study investigated this countercomplaint and discussed the current arrangements from the prespective of both city authorities and waste workers. The study recommended more automated waste collectors and compositors for the conservancy departments, increased active monitoring, work benefits, safety equipment for waste workers, and tailored training to eradicate work-related health hazards and injuries.

AIUM Official Statement: Guidelines for Cleaning and Preparing External- and Internal-Use Ultrasound Transducers and Equipment Between Patients as Well as Safe Handling and Use of Ultrasound Coupling Gel.

AIUM Official Statement: Guidelines for Cleaning and Preparing External- and Internal-Use Ultrasound Transducers and Equipment Between Patients as Well as Safe Handling and Use of Ultrasound Coupling Gel.

N-doped carbon nanotubes with high amount of graphitic nitrogen as an excellent electrocatalyst for water splitting in alkaline solution

Nitrogen-doped carbon nanotubes (NCNTs) containing high amounts of graphitic nitrogen (g-N) deposited on nickel foam (NF) are investigated as catalysts for the hydrogen (HER) and oxygen evolution reaction (OER) in alkaline solution. NCNTs with abundant g-N were synthesised on NF at a low temperature (600 °C) via atmospheric pressure chemical vapor deposition over electrodeposited Fe particles. The physicochemical characteristics of NCNTs@NF hybrid electrodes were investigated by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy and compared to those of graphene@NF, ultrathin graphite@NF, and N-doped graphite@NF. The electrochemical activity towards both the HER and OER on all samples was evaluated by linear sweep voltammetry. Experimental results paired with density functional theory (DFT) calculations revealed the contribution of both the metal substrate and the NCNTs to improve the HER performance. DFT results indicate that NCNTs containing high amounts of g-N are a very promising electrocatalyst for water splitting. Furthermore, this study will motivate a direction for reasonable design defects to improve the electrochemical performance of CNTs and consequently meet the targeted requirement of new clean energy devices.

Culture and awareness of occupational health risks amongst UK firefighters

Firefighters are exposed to toxic chemicals not only from the fire incidents they attend, but also from their contaminated station and/or personal protective equipment (PPE). Little is currently known about firefighters’ awareness, attitudes, and behaviours towards contaminants which was assessed in the UK firefighter contamination survey. Results revealed that lack of training on fire effluents and their health outcomes are strongly associated with increased fire smoke/contaminant exposure. Notably, untrained firefighters were at least twice as likely to: never clean personal protective equipment (PPE) (Crude Odds Ratio, OR 2.0, 1.5–2.7), infrequently send their PPE for professional cleaning (OR 2.0, 1.6–2.4), remain in the workwear (t-shirt etc.) worn while attending a fire incident (OR up to 3.6, 2.3–5.6), and indicate that cleaning at fire stations is not taken seriously (OR 2.4, 2.2–2.6). Firefighters personally viewing contamination as a “badge of honour” (BoH) were at least twice as likely to: remain in contaminated PPE after fire incidents (OR 2.3, 1.4–3.9), eat with sooty hands (OR 2.2, 1.9–2.5), notice soot in the nose/throat (OR 3.7, 2.7–5.2), and smell fire smoke on the body for more than a day after incidents (OR 2.0, 1.6–2.4). They were also more likely to indicate that cleaning at fire stations is not taken seriously (OR 2.5, 2.2–2.9) and that fire stations smell of smoke always/most of the time (OR 2.3, 2.0–2.6). Strong links were also found between belief in the BoH and never cleaning PPE (OR 1.9, 1.4–2.7), and eating while wearing contaminated PPE (OR 1.8, 1.5–2.2).

Novel MoS2-sputtered NiCoMg MOFs for high-performance hybrid supercapacitor applications

Supercapacitors are considered one of the possible next-generation clean energy storage devices; however, their specific capacitance still needs improvement regarding electrode materials. Herein, we prepared three types of electrode materials, i.e., pure NiCoMg MOFs deposited on Ni-foam (abbreviated as P-NiCoMg), NiCoMg MOFs deposited on MoS2-sputtered Ni-foam (signified as SN-NiCoMg), and MoS2-sputtered NiCoMg MOFs deposited on Ni-foam (shortened as S-NiCoMg). SEM and XRD revealed a successful preparation of cactus-like microstructure and coexistence of MoS2 and NiCoMg MOFs in the material of interest S-NiCoMg electrode. Interestingly, the S-NiCoMg electrode showed a specific capacitance of 2000 F/g, which is 1.8 and 1.4 times higher than the P-NiCoMg and SN-NiCoMg electrodes, respectively. This indicates the efficacy of enhancing specific capacitance electrode materials using MoS2 sputtering. Further, an asymmetric supercapacitor device of S-NiCoMg electrode with activated carbon demonstrated excellent specific capacitance, energy density, and power density of 211 F/g, 107 Wh/kg, and 1350 W/kg, respectively. Dunn’s model revealed that most charge storage is diffusion controlled (i.e., 64 %, 58 %, and 53 % at 3, 5, and 10 mV/sec, respectively). Overall, S-NiCoMg electrode material demonstrated excellent potential to be used as functional, affordable, recyclable, and low-cost supercapacitors for energy storage applications.

Estimation of household energy poverty and feasibility of clean energy transition: Evidence from rural areas in the Eastern Qinghai-Tibet Plateau

Energy poverty has attracted widespread attention from the government and researchers for its close relationship with human well-being and resident health. Estimating the energy poverty line is essential in understanding energy poverty and alleviating it. However, there is no consensus on the measurement of energy poverty. This paper defined the energy poverty line as the threshold at which energy consumption ceases to change significantly as household income increases, which is based on the household minimum energy demand. Considering the environmental endowment in Qinghai, this paper established new scenarios to examine the feasibility of replacing biomass with clean electricity. The findings show that 31.6% of rural households are energy poor in Qinghai. Basic energy demand has been met in Qinghai, but there are difficulties in shifting to a more efficient energy structure. Income, residents’ consumption habits and technical issues with clean energy equipment continue to limit the energy choices of rural households. Therefore, improving the actual performance of clean energy devices is critical in the clean energy transition. In addition, local governments can increase incentives for clean energy utilization by setting reasonable subsidies for clean energy.

Investigation of the working condition of large power solar panel cleaning device

Solar energy is becoming a key resource of electrical energy in the modern world. Therefore, it is necessary to use it rationally and profitably. The article deals with the issues of efficient use of solar panels due to automatic cleaning devices in winter. The proposed device allows you to use solar energy in maximum quantities, regardless of weather conditions and seasons. This device can be used in the construction of new solar power plants, as well as in the modernization of existing ones. The development and modernization of solar energy will improve the economic side of the energy situation in our country in the future.

Evaluation of the Efficacy of Nitrile Gloves Exposed to Chemical Germicide on Medical Devices in Central Sterile Services Department

Nitrile gloves are commonly used in Central Sterile Services Department in order to be often used when manually cleaning medical equipment such as personal protective equipment. As a result they are resistant to a wide range of chemicals and germicides, including alcohols, peroxides, and other sterilizing agents. In addition to providing chemical protection, nitrile gloves are resistant to punctures and tears, which is important when working with sharp medical instruments. This research focuses on the efficacy of gloves in relation to the multi-chemicals or compounds of nitrile gloves and observation at the point of use to remove soil and contact with chemicals on medical devices at the Central Sterile Supply Department. The powder-free nitrile exam gloves and extended cuff methods of chemical analysis of permeation testing of standard practice for assessment of resistance of medical gloves to permeation by chemotherapy drugs (ASTM D 6978-05), EN455 Part 1: 2000 were used to test the test method for single-use medical gloves. The standard of protective gloves against dangerous chemicals and microorganisms was tested by EN 420:2003 + A1:2009, EN388: 2016, ISO 374-1:2016, and ISO 374-5:2016. The testing of chemotherapy drugs and UV/NIS absorption spectrometry were used to measure the absorbance of test chemicals, which permeated through the specimens into the collection medium. The collection medium was circulated in a closed loop at an 11 ml/minute flow rate through the testing period. As a result, a glove user must protect against the specific chemicals or chemical mixtures to which they were exposed while manually cleaning medical devices. The physical properties of the gloves were evaluated by visual observations at the point of use for soil removal and chemical exposure to medical devices at the Central Sterile Supply Department of five hospitals. The results showed that nitrile gloves protected chemical exposure during manual cleaning of medical equipment at the point of use.

Modelling and development of sustainable energy systems

<abstract> <p>Due to the recent climate change, organizations all over the globe are developing plans for reducing carbon emissions by developing clean energy technologies and energy efficient devices. However, the path for transition to green energy system is still unclear and in general, the representation of green energy supply for transition pathways is limited. Therefore, this study outlines a plan for getting Swedish energy sector completely carbon neutral by 2050. The approach can also be applicable to the majority of nations worldwide. Computer based simulations are performed on Energy PLAN software for making clean, green and sustainable energy system that can balance every component of entire energy system during the study period 2022 to 2050. This study takes into account the sustainable use of renewable sources for all economic sectors as well as the interchange of energy with nearby nations under the two scenarios. Additionally, the energy system works in tandem with other industries to create a fully carbon-free environment. The results revealed that, 50% de-carbonization is possible till 2035 and 100% de-carbonization is possible till 2050. This enables a discussion of how ambitious 10-year goals might serve as a first step toward the mid-century elimination of fossil fuels from the energy sector.</p> </abstract>

Augmented and sustained oxygen reduction reaction activity of NiCo2O4 by the incorporation of Ag

A highly efficient and durable electro-catalyst for the oxygen reduction reaction (ORR) for the direct methanol fuel cells (DMFCs) is reported.

An ultra-high vacuum system for fabricating clean two-dimensional material devices.

High mobility electron gases confined at material interfaces have been a venue for major discoveries in condensed matter physics. Ultra-high vacuum (UHV) technologies played a key role in creating such high-quality interfaces. The advent of two-dimensional (2D) materials brought new opportunities to explore exotic physics in flat lands. UHV technologies may once again revolutionize research in low dimensions by facilitating the construction of ultra-clean interfaces with a wide variety of 2D materials. Here, we describe the design and operation of a UHV 2D material device fabrication system, in which the entire fabrication process is performed under pressure lower than 5 × 10-10 mbar. Specifically, the UHV system enables the exfoliation of atomically clean 2D materials. Subsequent in situ assembly of van der Waals heterostructures produces high-quality interfaces that are free of contamination. We demonstrate functionalities of this system through exemplary fabrication of various 2D materials and their heterostructures.

SEGURANÇA E PREVENÇÃO DE LESÕES ESPORTIVAS EM ESPORTES POPULARES NO GELO E NEVE

ABSTRACT Introduction: Following the development of ice and snow sports tourism projects, the hidden dangers of early extensive construction have gradually emerged. It mainly manifests itself in the sports safety of ice and snow sports tourism projects. Objective: Explore the management strategy of sports safety under the snow and ice sports tourism landscape. Methods: Literature research, interviews, and questionnaires were used to analyze the development in the study area of ice and snow tourism, the tourists themselves, and regional site construction. Finally, the paper analyzes strategies to improve sports safety management in related areas from the landscape manager's point of view. Results: The development of snow and ice sports tourism projects in the study area is satisfactory; however, due to the epidemic's impact, the current situation is relatively low, showing a trend of slow improvement. In terms of sports injury risk, after optimal training and safety management, the proportion of climatic characteristics of the site was 24.81%; the proportion of the population on the ski slopes was 40.92%; the proportion of equipment cleaning and maintenance was 59.23%; the degree of congestion on the ski slopes was 41.30%; the proportion of public safety was 34.42%; the proportion of basic emergency medical treatment was 32.30%; epidemics and other infectious diseases accounted for 83.13% of the total. Follow-up is done before the start, in the process, and after the occurrence of multiple managements. Conclusion: The safety management strategy of snow and ice sports tourism combines the factors of tourists and managers, and has great practical significance, so it is worthy of promotion. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.

Dynamics of a cavitation bubble between oblique plates

Experiments were performed to investigate the collapse dynamics of a cavitating bubble generated between a pair of symmetrically arranged oblique plates. A 2.0 mm gap was left at the converging end of the two plates, which were inclined at an angle of 10°. A focused laser beam generated a cavitation bubble of about 4.0 mm in diameter, at four different locations that were placed on the centerline between the glass plates. A high-speed camera captured the bubble's cavitating dynamics at a frame rate of 75 kHz. The initial position of the bubble and, thus, the boundary conditions significantly influenced the bubble's dynamics. The bubble's first collapses showed a distinct unidirectional extended jetting but without notch formation on the bubble's left surface. Subsequent collapses led to intense nucleation, a feature useful in microfluidic devices. Further on, we observed vertical pillar-shaped cavities, floating toroids, etc., shapes that were rarely mentioned in previous investigations. To support our experimental results, we performed numerical simulations based on solving the Navier–Stokes equations, to replicate similar bubble dynamics. Our results provided insight into bubble dynamics generated between oblique plates, thereby potentially contributing to an improved understanding of microfluidic pumping techniques, surface cleaning devices, fouling of complex shapes, biomedical devices employing cavitation-based methods, and micromixing of fluids. Results of these experiments may serve also as benchmark data to validate numerical methods.

玉米籽粒收获机清选装置作业机理分析与优化试验

Aiming at the current problem of the high rate of impurity and loss in the cleaning device of corn seed harvesters in China, this paper took the cleaning device of 4YZL-6 self-propelled corn seed harvester as a sample and analyzed the movement law of the material on the sieve. Box-Behnken response surface experimental design theory was used for the orthogonal tests. Wind inlet angle, airflow velocity, and crank angular velocity were selected as influencing factors, and the impurity rate and loss rate as the evaluation index of operation quality. A regression mathematical model between each influencing factor and indicator was established, and the model was also integrated and optimized. The optimal parameter combination was obtained as follows: the wind inlet angle was 37.95o, the airflow velocity was 11.3 m/s, and the crank angular velocity was 4.1 r/s. The corresponding impurity rate was 0.87% and the loss rate was 0.34%. Verification tests were conducted on the optimization results, and the test results showed that under the optimal combination of parameters, the impurity rate was 0.89% and the loss rate was 0.35%. The relative errors of each evaluation index and its model prediction were 2.29% and 2.94%, respectively.

ОЦЕНКА ЭФФЕКТИВНОСТИ СЕПАРАТОРА С СООСНО РАСПОЛОЖЕННЫМИ ТРУБАМИ ПРИОБЕСПЫЛИВАНИИ ГАЗОВЫХ ВЫБРОСОВ ПРИ РАЗЛИЧНОМ УГЛЕ РАСКРЫТИЯ ПРЯМОУГОЛЬНЫХ ЩЕЛЕЙ

An important task in dedusting gas emissions at chemical industry enterprises is to achieve high efficiency. A complex of devices is used for this. Large particles are removed from gases in coarse cleaning devices. Fine particles are removed from gases in fine cleaning devices. However, fine filters are quickly clogged, which leads to an increase in hydraulic resistance and, in some cases, to a decrease in efficiency. An urgent task is to increase their service life and increase efficiency. For this purpose, the paper proposes the design of a separator with coaxially arranged pipes, which is proposed to be installed in front of fine filters. The aim of this work is to numerically investigate the effect of the angle of opening of rectangular slits on the efficiency and hydraulic resistance of a separator with coaxially arranged pipes. The article presents the design of the separator. The principle of operation is described. During numerical calculations, the inlet velocity of the gas flow was set at the inlet of the device, which varied from 3 to 10 m/s, and the mass flow rate of particles was 5 g/s. The particle density varied from 1000 to 3000 kg/m3. The particle diameter varied from 1 to 15 microns. The opening angle of the slits varied from 16 to 24 °. During the calculations, the following main conclusions were made: the structure of vortices in the inter-tube space determines the degree of efficiency of a separator with coaxially arranged pipes, with the angle of opening of rectangular slits α = 20 °, the maximum separation efficiency of fine particles up to 10 microns in size from a dusty stream is equal to an average of 40.3%, the separation efficiency of fine particles from a dusty stream is achieved. the flow rate increases with an increase in the input gas velocity and particle density, because they are easier to dislodge from the swirling gas, the pressure loss in the separator with coaxially arranged pipes is no more than 626 Pa.