Liquid sulfur dioxide production method based on sulfur and oxygen. R&D of economically feasible method

The article shows the relevance of the industrial production of liquid sulfur dioxide, as well as the fields of its application. Herewith there is provided a brief description of the known methods for the production of liquid sulfur dioxide: the use of roast gas; sulfur-oleum method; multi-stage condensation; low temperature cryogenic process; oxidation of sulfur with oxygen under its stoichiometric deficiency. In the course of the analysis, the main shortcomings of the considered methods were identified, which made it possible to develop an innovative version of the process scheme. Based on the data obtained, JSC “NIUIF” has developed and patented a method for producing liquid sulfur dioxide, the main raw material of which is sulfur and oxygen under its stoichiometric deficiency. The principal difference of the proposed industrial scheme is the use of technical oxygen instead of air blast and the use of a sulfur furnace and a sulfur vapor condenser combined in one housing in the apparatus scheme. The proposed solution significantly reduces energy consumption and eliminates the possibility of liquid sulfur crystallizing inside the equipment. Therefore, this scheme can be considered more reliable and reasonable in comparison with the existing ones. Also, in the process scheme of the developed unit, the production of 1 ton of liquid sulfur dioxide consumes significantly less energy than in the existing technologies. To determine the design parameters of the equipment and master the processes, the article describes a lab unit for producing liquid sulfur dioxide, developed and already installed at JSC "NIUIF". At the moment, experiments are carried out at the facility for the purpose of adjusting the operation mode and collecting the physical and chemical process data.

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Industrial and laboratory technologies of liquid sulphur dioxide based on sulfur and oxygen.

Transaction Kola Science Cetnre ◽

10.37614/2307-5252.2020.3.4.014 ◽

2020 ◽

Vol 11 (3-2020) ◽

pp. 68-72

Author(s):

V. V. Igin ◽

◽

М. А. Zelenova-Gyulalieva ◽

K. V. Aksenchik ◽

◽

...

Keyword(s):

Sulfur Dioxide ◽

Sulphur Dioxide ◽

Industrial Process ◽

Operating Mode ◽

Design Parameters ◽

Sulfur Vapor ◽

Liquid Sulfur ◽

Liquid Sulphur ◽

Industrial Unit ◽

The Moment

The article tells about the industrial unit for production of liquid sulfur dioxide based on sulfur and oxygen, which has been developed by Research Institute of Fertilizers and Insectofungicides(patent No. 2711642 dated 01/17/2020). The principal difference of the proposed industrial process is the use of technical oxygen instead of FDF and the use of a sulfur furnace and a sulfur vapor condenser combined in one housing. To determine the design parameters of equipment and to master the process, the article describes a lab unit for production of liquid sulfur dioxide, developed by and implemented at Research Instituteof Fertilizers and Insectofungicides. At the moment, the lab unit is run to adjust the operating mode.

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Conjugate Heat Transfer and Film Cooling of a Multi-Stage Cooling Scheme

Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C ◽

10.1115/imece2008-69138 ◽

2008 ◽

Author(s):

M. Ghorab ◽

S. I. Kim ◽

I. Hassan

Keyword(s):

Heat Transfer ◽

Film Cooling ◽

Gas Turbines ◽

Conjugate Heat Transfer ◽

Density Ratio ◽

Design Parameters ◽

Cooling Effectiveness ◽

Film Cooling Effectiveness ◽

Multi Stage ◽

Internal Gap

Cooling techniques play a key role in improving efficiency and power output of modern gas turbines. The conjugate technique of film and impingement cooling schemes is considered in this study. The Multi-Stage Cooling Scheme (MSCS) involves coolant passing from inside to outside turbine blade through two stages. The first stage; the coolant passes through first hole to internal gap where the impinging jet cools the external layer of the blade. Finally, the coolant passes through the internal gap to the second hole which has specific designed geometry for external film cooling. The effect of design parameters, such as, offset distance between two-stage holes, gap height, and inclination angle of the first hole, on upstream conjugate heat transfer rate and downstream film cooling effectiveness performance are investigated computationally. An Inconel 617 alloy with variable properties is selected for the solid material. The conjugate heat transfer and film cooling characteristics of MSCS are analyzed across blowing ratios of Br = 1 and 2 for density ratio, 2. This study presents upstream wall temperature distributions due to conjugate heat transfer for different gap design parameters. The maximum film cooling effectiveness with upstream conjugate heat transfer is less than adiabatic film cooling effectiveness by 24–34%. However, the full coverage of cooling effectiveness in spanwise direction can be obtained using internal cooling with conjugate heat transfer, whereas adiabatic film cooling effectiveness has narrow distribution.

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ChemInform Abstract: Indium-Triflate-Catalyzed Ritter Reaction in Liquid Sulfur Dioxide.

ChemInform ◽

10.1002/chin.201629056 ◽

2016 ◽

Vol 47 (29) ◽

Author(s):

Daniels Posevins ◽

Krista Suta ◽

Maris Turks

Keyword(s):

Sulfur Dioxide ◽

Ritter Reaction ◽

Liquid Sulfur ◽

Indium Triflate

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ChemInform Abstract: FORMATION OF CROSSED PHENAZINE FROM THE REACTION BETWEEN TETRA-P-ANISYL- AND TETRA-P-TOLYLHYDRAZINES IN LIQUID SULFUR DIOXIDE

Chemischer Informationsdienst ◽

10.1002/chin.197615261 ◽

1976 ◽

Vol 7 (15) ◽

pp. no-no

Author(s):

T. ANDO ◽

M. NOJIMA ◽

N. TOLURA

Keyword(s):

Sulfur Dioxide ◽

Liquid Sulfur

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Reaction of α-Phenethyl Radical in Liquid Sulfur Dioxide

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.42.3001 ◽

1969 ◽

Vol 42 (10) ◽

pp. 3001-3002 ◽

Cited By ~ 1

Author(s):

Masashi Iino ◽

Tsutomu Enomoto ◽

Niichiro Tokura

Keyword(s):

Sulfur Dioxide ◽

Liquid Sulfur

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Combined destruction of ethylene glycol, formaldehyde and methanol by biological methods

Vodosnabzhenie i sanitarnaia tehnika ◽

10.35776/vst.2021.08.06 ◽

2021 ◽

pp. 40-47

Author(s):

М.Г. Зубов ◽

Е.В. Вильсон ◽

В.А. Литвиненко ◽

А.А. Кадревич

Keyword(s):

Ethylene Glycol ◽

Pilot Plant ◽

Treatment Plant ◽

Ammonium Nitrogen ◽

Design Parameters ◽

Specific Rate ◽

Toxic Substances ◽

Multi Stage ◽

Enhanced Biodegradation ◽

Biological Methods

Целью прикладного научного исследования является определение удельной скорости окисления токсичных органических соединений – этиленгликоля, формальдегида и метанола – сообществом микроорганизмов иммобилизованного биоценоза на носителе ЁРШ®, установленном в пилотной установке. Для достижения поставленной цели реализован многоэтапный эксперимент, позволивший определить возможность глубокой биодеградации токсичных веществ и установить необходимую концентрацию азота аммонийного в исходной сточной воде для реализации процесса биодеградации. В ходе исследования были выполнены следующие работы: определение времени выхода на режим пилотной установки после плановой остановки в подаче сточных вод на 31-й день; оценка удельной скорости окисления прикрепленным биоценозом по показателям этиленгликоль, формальдегид, ХПК, БПК; оценка ассимиляции и трансформации соединений азота; формулирование выводов на основе проведенного анализа результатов исследований, необходимых для оценки целесообразности применения биологической очистки сточных вод прикрепленным биоценозом исследуемых загрязнителей и определения расчетных параметров очистного сооружения. The objective of the applied scientific research is to determine the specific rate of oxidation of toxic organic compounds – ethylene glycol, formaldehyde and methanol – by the community of microorganisms of the immobilized biocenosis on the IORSh carrier installed in a pilot plant. To achieve this goal, a multi-stage experiment was carried out that provided for determining possible enhanced biodegradation of toxic substances and specifying the required concentration of ammonium nitrogen in raw wastewater for the implementation of the biodegradation process. In the course of the study, the following works were carried out: determining the process stabilization time in the pilot plant after the scheduled shutdown in the wastewater supply on the 31stday; assessing the specific rate of oxidation by the attached biocenosis in terms of ethylene glycol, formaldehyde, COD, BOD; assessing the assimilation and transformation of nitrogen compounds; drawing conclusions based on the analysis of the research results required for estimating the feasibility of using biological wastewater treatment with the attached biocenosis of the pollutants under study and determining the design parameters of the treatment plant.

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