ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ
Creation of new composite granular fertilizers with layered structure, which are formed due to the layered mechanism of granulation in the granulator of the fluidized bed is an urgent task. The process of forming these granules is achieved due to the layered granulation mechanism, the basis of which...
Збережено в:
| Дата: | 2021 |
|---|---|
| Автори: | , , |
| Формат: | Стаття |
| Мова: | Ukrainian |
| Опубліковано: |
Institute of Engineering Thermophysics of NAS of Ukraine
2021
|
| Онлайн доступ: | https://ihe.nas.gov.ua/index.php/journal/article/view/465 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Thermophysics and Thermal Power Engineering |
Репозитарії
Thermophysics and Thermal Power Engineering| id |
oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-465 |
|---|---|
| record_format |
ojs |
| institution |
Thermophysics and Thermal Power Engineering |
| baseUrl_str |
|
| datestamp_date |
2021-12-20T09:25:15Z |
| collection |
OJS |
| language |
Ukrainian |
| format |
Article |
| author |
Hotskyi, Ya.H. Ivanitsky, G.K. Stepaniuk, A. R. |
| spellingShingle |
Hotskyi, Ya.H. Ivanitsky, G.K. Stepaniuk, A. R. ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ |
| author_facet |
Hotskyi, Ya.H. Ivanitsky, G.K. Stepaniuk, A. R. |
| author_sort |
Hotskyi, Ya.H. |
| title |
ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ |
| title_short |
ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ |
| title_full |
ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ |
| title_fullStr |
ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ |
| title_full_unstemmed |
ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ |
| title_sort |
дослідження кінетики випаровування та кристалізації крапель розчину сульфату амонію, розміщеної на пласкій нагрітій поверхні |
| title_alt |
INVESTIGATION OF THE EVAPORATION AND CRYSTALLIZATION OF A SESSILE DROP OF AMMONIUM SULFATE SOLUTION ON A SMOOTH HEATED SURFACE. |
| description |
Creation of new composite granular fertilizers with layered structure, which are formed due to the layered mechanism of granulation in the granulator of the fluidized bed is an urgent task. The process of forming these granules is achieved due to the layered granulation mechanism, the basis of which is the formation of a layer of solids on the surface of the granules by mass crystallization.
In the production of granular fertilizers based on ammonium sulfate with the addition of organic and inorganic impurities an important place is occupied by the processes of evaporation and mass crystallization, which determine the morphological properties of the obtained granular material.
During the experimental study of the evaporation process, it was found that the process consists of three main evaporation periods: the heating period from the initial temperature to equilibrium, the period of equilibrium evaporation and the decreasing drying rate period with crust formation, during which a solid crystal structure is formed. The beginning of each period according to the example of drying droplets in a gas stream during spray drying is described by the nature of the change in droplet temperature.
This paper presents the obtained thermograms of the process of evaporation of droplets with a diameter of 3–7 mm 40%, 50% and 60% aqueous solutions of ammonium sulfate with the addition of a mixture of bone meal. The evaporation of 40%, 50% and 60% solutions of ammonium sulfate with the addition of a mixture of bone meal, with a given ratio of AS: BM on a dry residue of 60:40 and 80:20 on a surface temperature of 95°C in the second evaporation period crystalline nuclei appear, and the concentration of solute is close to saturated and almost unchanged, so that the evaporation rate and temperature of the drop, as can be seen from the thermogram, remain constant temperature for all solutions of ammonium sulfate. Increasing the content of bone meal from 8 to 24% to shift the wet thermometer in the kinetics of the evaporation process.
The paper also presents the results of morphological analysis of the obtained solid crystallized drops of ammonium sulfate with impurities of bone meal. It was found that the solid crystallized drop of ammonium sulfate with bone meal consists of a framework of microcrystals of ammonium sulfate, with a reduced size of 10 to 80 μm, bone meal in the form of inclusions is placed in the frame, the particle size of bone meal varies up to 100 μm, indicating that the solution is a suspension. |
| publisher |
Institute of Engineering Thermophysics of NAS of Ukraine |
| publishDate |
2021 |
| url |
https://ihe.nas.gov.ua/index.php/journal/article/view/465 |
| work_keys_str_mv |
AT hotskyiyah investigationoftheevaporationandcrystallizationofasessiledropofammoniumsulfatesolutiononasmoothheatedsurface AT ivanitskygk investigationoftheevaporationandcrystallizationofasessiledropofammoniumsulfatesolutiononasmoothheatedsurface AT stepaniukar investigationoftheevaporationandcrystallizationofasessiledropofammoniumsulfatesolutiononasmoothheatedsurface AT hotskyiyah doslídžennâkínetikiviparovuvannâtakristalízacííkrapelʹrozčinusulʹfatuamoníûrozmíŝenoínaplaskíjnagrítíjpoverhní AT ivanitskygk doslídžennâkínetikiviparovuvannâtakristalízacííkrapelʹrozčinusulʹfatuamoníûrozmíŝenoínaplaskíjnagrítíjpoverhní AT stepaniukar doslídžennâkínetikiviparovuvannâtakristalízacííkrapelʹrozčinusulʹfatuamoníûrozmíŝenoínaplaskíjnagrítíjpoverhní |
| first_indexed |
2025-12-17T13:55:44Z |
| last_indexed |
2025-12-17T13:55:44Z |
| _version_ |
1851763976684175360 |
| spelling |
oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-4652021-12-20T09:25:15Z INVESTIGATION OF THE EVAPORATION AND CRYSTALLIZATION OF A SESSILE DROP OF AMMONIUM SULFATE SOLUTION ON A SMOOTH HEATED SURFACE. ДОСЛІДЖЕННЯ КІНЕТИКИ ВИПАРОВУВАННЯ ТА КРИСТАЛІЗАЦІЇ КРАПЕЛЬ РОЗЧИНУ СУЛЬФАТУ АМОНІЮ, РОЗМІЩЕНОЇ НА ПЛАСКІЙ НАГРІТІЙ ПОВЕРХНІ Hotskyi, Ya.H. Ivanitsky, G.K. Stepaniuk, A. R. Creation of new composite granular fertilizers with layered structure, which are formed due to the layered mechanism of granulation in the granulator of the fluidized bed is an urgent task. The process of forming these granules is achieved due to the layered granulation mechanism, the basis of which is the formation of a layer of solids on the surface of the granules by mass crystallization. In the production of granular fertilizers based on ammonium sulfate with the addition of organic and inorganic impurities an important place is occupied by the processes of evaporation and mass crystallization, which determine the morphological properties of the obtained granular material. During the experimental study of the evaporation process, it was found that the process consists of three main evaporation periods: the heating period from the initial temperature to equilibrium, the period of equilibrium evaporation and the decreasing drying rate period with crust formation, during which a solid crystal structure is formed. The beginning of each period according to the example of drying droplets in a gas stream during spray drying is described by the nature of the change in droplet temperature. This paper presents the obtained thermograms of the process of evaporation of droplets with a diameter of 3–7 mm 40%, 50% and 60% aqueous solutions of ammonium sulfate with the addition of a mixture of bone meal. The evaporation of 40%, 50% and 60% solutions of ammonium sulfate with the addition of a mixture of bone meal, with a given ratio of AS: BM on a dry residue of 60:40 and 80:20 on a surface temperature of 95°C in the second evaporation period crystalline nuclei appear, and the concentration of solute is close to saturated and almost unchanged, so that the evaporation rate and temperature of the drop, as can be seen from the thermogram, remain constant temperature for all solutions of ammonium sulfate. Increasing the content of bone meal from 8 to 24% to shift the wet thermometer in the kinetics of the evaporation process. The paper also presents the results of morphological analysis of the obtained solid crystallized drops of ammonium sulfate with impurities of bone meal. It was found that the solid crystallized drop of ammonium sulfate with bone meal consists of a framework of microcrystals of ammonium sulfate, with a reduced size of 10 to 80 μm, bone meal in the form of inclusions is placed in the frame, the particle size of bone meal varies up to 100 μm, indicating that the solution is a suspension. Наведено кінетичні залежності зміни температури краплини водних розчинів сульфату амонію з додаванням кістяного борошна з різним складом цільових компонентів при її випаровуванні на нагрітій поверхні. Визначено вплив концентрації сульфату амонію та кістяного борошна на морфологічну структуру кристалізованого шару. Приведены кинетические зависимости изменения температуры капли водных растворов сульфата аммония с добавлением костяной муки с различным составом целевых компонентов при ее испарении на нагретой поверхности. Определено влияние концентрации сульфата аммония и костяной муки на морфологическую структуру кристаллизованного слоя. The kinetic dependences of the temperature change of a drop of aqueous solutions of ammonium sulfate with the addition of bone meal with different composition of the target components during its evaporation on a heated surface are given. The influence of the concentration of ammonium sulfate and bone meal on the morphological structure of the crystallized layer was determined. Institute of Engineering Thermophysics of NAS of Ukraine 2021-12-20 Article Article application/pdf https://ihe.nas.gov.ua/index.php/journal/article/view/465 10.31472/ttpe.4.2021.6 Thermophysics and Thermal Power Engineering; Vol 43 No 4 (2021): Thermophysics and Thermal Power Engineering; 51-61 Теплофизика и Теплоэнергетика; Vol 43 No 4 (2021): Thermophysics and Thermal Power Engineering; 51-61 Теплофізика та Теплоенергетика; Vol 43 No 4 (2021): Thermophysics and Thermal Power Engineering; 51-61 2663-7235 uk https://ihe.nas.gov.ua/index.php/journal/article/view/465/393 |