Study of venturi scrubber efficiency in collection of Fe2O3 airborne dust at an iron making unit

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JAMSHIDI RASTANI MAHDI; GHORBANI SHAHNA FARSHID; BAHRAMI ABDOLRAHMAN; ZAREI MOHSEN; HOSSEINI SOMAYEH

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Journal: IRAN OCCUPATIONAL HEALTH JOURNAL Year:2016 | Volume:13 | Issue:3 Page(s): 33-46

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Title

Study of venturi scrubber efficiency in collection of Fe2O3 airborne dust at an iron making unit

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ScrubberQ2

EfficiencyQ2

Venturi scrubberQ2

Steel industryQ2

Abstract

Background and aims: Steel industry plays an important role in air pollution and particulate emissions released to the environment. The venturi Scrubber is one of the most important Scrubbers and components at local exhaust ventilation which has a lot of application to control of the contaminants emissions to the atmosphere in Steel industry. The Efficiency of this equipment depends on how to use it, therefore, the aim of this study is determination of the Efficiency of a venturi Scrubber at an iron making unit. Methods: This research is a descriptive cross-sectional study to determine venturi Scrubbers’ Efficiency in collection of particles of different sizes. Sampling to be fulfilled based on BS 3405 method and duct internal isokinetic sampling at 30 l/min flow before and after venturi Scrubber using sampling sequence including a set of probe with standard inlet nozzle, sampler and particles classifier (the four-stage cascade impactor) which followed with the flow control and measurement equipment. The samples were analyzed using gravimetric method and the results were analyzed through SPSS v. 16. Results: The fluid velocity was in the throat of the Scrubber 71. 4 m/s and the ratio of liquid to gas 1. 12 l/m3. The mean of total dust concentration was before and after venturi, 6857. 5mg/m3 and 964. 7mg/m3, respectively. The overall Efficiency of the venturi Scrubber was 85. 93%. The maximum removal of the particle size distribution was respectively to particle size 15μ m<, 15-4μ m, 4-1μ m and <1μ m and 93. 2%, 90. 6%, 79. 4%, 30. 4%. In effect of abrasion and leakage in duct working before Scrubber, the load of the entrance dust to the Scrubber at the design documents from 25. 6g/m3 changed and reduced to 6. 86g/m3 at the present status. Conclusion: It is concluded that Scrubber’ s Efficiency increased in parallel increasing in particle aerodynamic diameter, but its removal Efficiency was not achieved to desirable level for particle size lower than 1 μ m because of inappropriate modification in some design parameters such as nozzles. Regarding decrease in load pollutant input, performance of this Scrubber is not acceptable even for large particle sizes.

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APA: Copy

JAMSHIDI RASTANI, MAHDI, GHORBANI SHAHNA, FARSHID, BAHRAMI, ABDOLRAHMAN, ZAREI, MOHSEN, & HOSSEINI, SOMAYEH. (2016). Study of venturi scrubber efficiency in collection of Fe2O3 airborne dust at an iron making unit. IRAN OCCUPATIONAL HEALTH JOURNAL, 13(3 ), 33-46. SID. https://sid.ir/paper/128986/en

Vancouver: Copy

JAMSHIDI RASTANI MAHDI, GHORBANI SHAHNA FARSHID, BAHRAMI ABDOLRAHMAN, ZAREI MOHSEN, HOSSEINI SOMAYEH. Study of venturi scrubber efficiency in collection of Fe2O3 airborne dust at an iron making unit. IRAN OCCUPATIONAL HEALTH JOURNAL[Internet]. 2016;13(3 ):33-46. Available from: https://sid.ir/paper/128986/en

IEEE: Copy

MAHDI JAMSHIDI RASTANI, FARSHID GHORBANI SHAHNA, ABDOLRAHMAN BAHRAMI, MOHSEN ZAREI, and SOMAYEH HOSSEINI, “Study of venturi scrubber efficiency in collection of Fe2O3 airborne dust at an iron making unit,” IRAN OCCUPATIONAL HEALTH JOURNAL, vol. 13, no. 3 , pp. 33–46, 2016, [Online]. Available: https://sid.ir/paper/128986/en

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