CRYSTALLIZATION OF A NaCl SOLUTION IN A VACUUM CENTRIFUGAL FILM DISTILLER

Scientific news of KPI, Oct 2019

Background. The use of centrifugal forces in heat exchangers provides high efficiency of heat and mass transfer processes and allows creating devices that are operable under microgravity conditions. The short contact time of the solution with the heat exchange surface prevents deposits of dissolved substances when concentration of the solution increases. As a result, the centrifugal distillation apparatus can operate as a crystallizer, which provides an increase in the coefficient of water recovery in the life support systems for deep space missions.Objective. The purpose of the paper is investigation of a single-stage centrifugal flash-boiling distiller for concentration of a NaCl solution.Methods. Experimental studies on a prototype of centrifugal vacuum single-stage distiller.Results. The results were obtained by concentrating a NaCl solution and in the crystallization mode (when precipitation of dissolved NaCl crystals begins). The physicochemical temperature depression was determined depending on the concentration of the solution and the pressure in the apparatus with quality control of the obtained distillate. The results were compared with the data of other authors, and the match was pretty good. Using a filter in a hot circuit allows you to work in crystallizer mode without the appearance of deposits on the structural elements of the apparatus.Conclusions. Intensive heat transfer in a centrifugal apparatus ensures the complete operation of the solution overheating, which makes it possible to use it to study the physicochemical temperature depression of solutions at different pressures. In this case, the quality of the distillate does not depend on the concentration of dissolved substances in the hot circuit (and in the crystallization mode). The use of the filter in the hot circuit allows the system to operate in crystallizer mode until the filter becomes clogged. After replacing the filter, the process can be extended.

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CRYSTALLIZATION OF A NaCl SOLUTION IN A VACUUM CENTRIFUGAL FILM DISTILLER

77 ɏȱɆȱɑɇȱ ɌȿɏɇɈɅɈȽȱȲ DOI: 10.20535/kpi-sn.2019.4.181280 ±¢¨ 629.78.048:628.16.048 .¬. Ÿ¾Î¾¿¾Ö1, ž.¯. ¯ÌÉÌʾӾ1 , .¡. ®‘ÒÃÎÐ1, .¡. ÃÐÎÃËÈÌ1, .. ±ÏÃËÈÌ1, .. ŸÌÝˑÀÏÚÈÆÇ2 1 ¨ ‘Ê. ÁÌÎÝ ¯‘ÈÌÎÏÚÈÌÁÌ, ¨ÆÀ, ±ÈξË¾ 2 °¬ “®Ì¿ÃÎÐ ŸÌÖ ©ÐÂ.”, ¨ÆÀ, ±ÈξË¾ correspondingauthor: ± ž¨±±ª«¬ª± ¨®¦¯°ž©¥ž´½ ®¬¥µ¦«± NaCl ¢´£«°®¬ ¬ª± © ¨¬ ¬ª± ¢¦¯°¦©½°¬® ÎÌ¿ÉÃÊ¾ÐÆÈ¾. ÆÈÌÎÆÏоËËÝ À‘ÂÔÃËÐÎÌÀÆÓ ÏÆÉ Ñ ÐÃÍÉÌʾÏÌ̿ʑËËÆÓ ¾Í¾Î¾Ð¾Ó ž¿ÃÅÍÃÕј ÀÆÏÌÈÑ ÃÒÃÈÐÆÀˑÏÐÚ ÍÎÌÔÃϑÀ ÐÃÍÉÌʾÏÌ̿ʑËÑ ‘ ¾˜ ÅÊÌÁÑ ÏÐÀÌÎÆÐÆ ¾Í¾Î¾ÐÆ, Ýȑ ÍξÔÞÐˑ À ÑÊÌÀ¾Ó ʑÈÎÌÁξÀ‘оԑ, ӾξÈÐÃÎËÆÓ ÂÉÝ ÈÌÏʑÕËÆÓ ¾Í¾Î¾Ð‘À. ª¾ÉÆÇ Õ¾Ï ÈÌËоÈÐÑ ÎÌÅÕÆËÑ Å ÐÃÍÉÌ̿ʑËËÌÜ ÍÌÀÃÎÓËÃÜ ÏÐÀÌÎܘ ÍÃÎÃÂÑÊÌÀÆ ÂÉÝ ÍÌÍÃÎÃÂÄÃËËÝ À‘ÂÈɾ¾ËËÝ ÎÌÅÕÆËÃËÆÓ ÎÃÕÌÀÆË ÍÎÆ ͑ÂÀÆ×ÃËˑ ÈÌËÔÃËÐξԑ ÎÌÅÕÆËÑ. ˾ÏɑÂÌÈ ÔÚÌÁÌ À‘ÂÔÃËÐÎÌÀÆÇ ÂÆÏÐÆÉÝԑÇËÆÇ ¾Í¾Î¾Ð ÊÌÄà ÍξÔÜÀ¾ÐÆ À ÎÃÄÆÊ‘ ÈÎÆÏоɑžÐÌξ, ×Ì Å¾¿ÃÅÍÃÕÆÐÚ Å¿‘ÉÚÖÃËËÝ ÈÌÃґԑ˜Ëо ÎÃÁÃËÃξԑ ÀÌÂÆ À ÏÆÏÐÃÊ¾Ó ÄÆÐИž¿ÃÅÍÃÕÃËËÝ Í‘ÉÌÐÌÀ¾ËÆÓ ÈÌÏʑÕËÆÓ ¾Í¾Î¾Ð‘À. ªÃо ÂÌÏɑÂÄÃËËÝ. ¢ÌÏɑÂÄÃËËÝ ÎÌ¿ÌÐÆ ÌÂËÌÏÐÑÍÃËÃÀÌÁÌ À‘ÂÔÃËÐÎÌÀÌÁÌ ÂÆÏÐÆÉÝÐÌξ ÀÆ¿ÑÓÌÀÌÁÌ ÏÈÆÍ¾ËËÝ ÍÎÆ ÈÌËÔÃËÐÎÑÀ¾Ëˑ ÎÌÅÕÆËÑ NaCl. ªÃÐÌÂÆÈ¾ Îþɑžԑ. £ÈÏÍÃÎÆÊÃËоÉÚˑ ÂÌÏɑÂÄÃËËÝ Ë¾ ÂÌÏɑÂËÌÊÑ ÅξÅÈÑ À‘ÂÔÃËÐÎÌÀÌÁÌ À¾ÈÑÑÊËÌÁÌ ÌÂËÌÏÐÑÍÃËÃÀÌÁÌ ÂÆÏÐÆÉÝÐÌξ. ®ÃÅÑÉÚÐ¾ÐÆ ÂÌÏɑÂÄÃËËÝ. ¬ÐÎÆÊ¾ËÌ ÎÃÅÑÉÚÐ¾ÐÆ ÍÎÆ ÈÌËÔÃËÐÎÑÀ¾Ëˑ ÎÌÅÕÆËÑ NaCl, Ñ Ð.Õ. Ñ ÎÃÄÆÊ‘ ÈÎÆÏоɑžԑ (ÈÌÉÆ ÎÌÅÍÌÕÆË¾˜ÐÚÏÝ ÀÆÍ¾Â¾ËËÝ ÎÌÅÕÆËÃËÆÓ ÈÎÆÏоɑÀ NaCl). ÆÅ˾ÕÃËÌ Ò‘ÅÆÈÌ-ӑʑÕËÑ ÐÃÊÍÃξÐÑÎËÑ ÂÃÍÎÃÏ‘Ü Å¾ÉÃÄËÌ À‘ ÈÌËÔÃËÐξԑ ÎÌÅÕÆËÑ ‘ ÐÆÏÈÑ À ¾Í¾Î¾Ð‘ Å ÈÌËÐÎÌÉÃÊ ÝÈÌÏБ ÌÐÎÆÊ¾ËÌÁÌ ÂÆÏÐÆÉÝÐÑ. ÎÌÀÃÂÃËÌ ÍÌΑÀËÝËËÝ ÌÐÎÆÊ¾ËÆÓ ÎÃÅÑÉÚоБÀ ‘Å Â¾ËÆÊÆ ‘ËÖÆÓ ¾ÀÐÌΑÀ. ÌȾžËÌ ÓÌÎÌÖÆÇ Å¿‘Á. ÆÈÌÎÆÏоËËÝ Ò‘ÉÚÐξ À Á¾ÎÝÕÌÊÑ ÈÌËÐÑΑ ¾˜ ÅÊÌÁÑ ÍξÔÜÀ¾ÐÆ À ÎÃÄÆÊ‘ ÈÎÆÏоɑžÐÌξ ¿ÃÅ ÍÌÝÀÆ À‘ÂÈɾÂÃËÚ Ë¾ ÈÌËÏÐÎÑÈÐÆÀËÆÓ ÃÉÃÊÃËÐ¾Ó ¾Í¾Î¾Ð¾. ÆÏËÌÀÈÆ. ËÐÃËÏÆÀËÆÇ ÐÃÍÉÌÌ¿Ê‘Ë Ñ À‘ÂÔÃËÐÎÌÀÌÊÑ ¾Í¾Î¾Ð‘ ž¿ÃÅÍÃÕј ÍÌÀËà ÏÍξÔÜÀ¾ËËÝ ÍÃÎÃÁΑÀÑ ÎÌÅÕÆËÑ, ×Ì Â¾˜ ÊÌÄÉÆÀ‘ÏÐÚ ÀÆÈÌÎÆÏÐÌÀÑÀ¾ÐÆ ÇÌÁÌ ÂÉÝ ÀÆÀÕÃËËÝ Ò‘ÅÆÈÌ-ӑʑÕË̝ ÐÃÊÍÃξÐÑÎË̝ ÂÃÍÎÃϑ ÎÌÅÕÆË‘À ž ΑÅËÆÓ ÐÆÏȑÀ. ÎÆ ÔÚÌÊÑ ÝȑÏÐÚ ÂÆÏÐÆÉÝÐÑ Ëà žÉÃÄÆÐÚ À‘ ÈÌËÔÃËÐξԑ ÎÌÅÕÆËÃËÆÓ ÎÃÕÌÀÆË Ñ Á¾ÎÝÕÌÊÑ ÈÌËÐÑΑ (Ñ Ð.Õ. Ñ ÎÃÄÆÊ‘ ÈÎÆÏоɑžԑ). ÆÈÌÎÆÏоËËÝ Ò‘ÉÚÐξ À Á¾ÎÝÕÌÊÑ ÈÌËÐÑΑ ž¿ÃÅÍÃÕј ÊÌÄÉÆÀ‘ÏÐÚ ÎÌ¿ÌÐÆ ÏÆÏÐÃÊÆ À ÎÃÄÆÊ‘ ÈÎÆÏоɑžÐÌξ ÂÌ Å¾¿ÆÀ¾ËËÝ Ò‘ÉÚÐξ. ‘ÏÉÝ Å¾Ê‘ËÆ ґÉÚÐξ ÍÎÌÔÃÏ ÊÌÄà ¿ÑÐÆ ÍÌÂÌÀÄÃËÆÇ. ¨ÉÜÕÌÀ‘ ÏÉÌÀ¾: ÈÎÆÏоɑžԑÝ; À‘ÂÔÃËÐÎÌÀÆÇ ÂÆÏÐÆÉÝÐÌÎ; ʑÈÎÌÁξÀ‘оԑÝ; NaCl. 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ÈÌÏʑÕËÆÓ Ê‘Ï‘Ç. ¯ÆÏÐÃÊÆ, Ýȑ ¿¾ÅÑÜÐÚÏÝ Ë¾ ÔÚÌÊÑ ÏÍÌÏÌ¿‘, ÊÌÄÑÐÚ Å¾¿ÃÅÍÃÕÆÐÆ ÎÃÁÃËÃÎ¾Ô‘Ü ÀÌÂÆ Å ÑÏ‘Ó À‘ÂÌÊÆÓ Î‘ÂÈÆÓ ÍÎÌÂÑÈБÀ ÄÆÐИ‘ÝÉÚËÌÏБ ÈÌÏÊÌ˾ÀБÀ (ÏÃÕ¾, ϾˑоÎËÌ-Á‘Á‘˜Ë‘Õ˾ À̾, ÈÌËÂÃËϾР¾ÐÊÌÏÒÃÎË̝ ÀÌÉÌÁÆ) ‘Å ÌÐÎÆÊ¾ËËÝÊ ÂÆÏÐÆÉÝÐÑ ÀÆÏÌÈ̝ ÝÈÌÏБ. ± ÎÃÅÑÉÚоБ ξˑÖà ÍÎÌÀÃÂÃËÆÓ ÂÌÏɑÂÄÃËÚ ¿Ñɾ ÍÌȾž˾ ÊÌÄÉÆÀ‘ÏÐÚ ÂÌÏÝÁËÃËËÝ ÎÃÁÃËÃξԑ ÀÌÂÆ ˾ ΑÀˑ 93 ± 1% [3—5]. ¬ÂËÆÊ ‘Å ÊÌÄÉÆÀÆÓ ÏÍÌÏÌ¿‘À ͑ÂÀÆ×ÃËËÝ ÈÌÃґԑ˜Ëо ÀÆÉÑÕÃËËÝ ÀÌÂÆ ‘Å ΑÅËÌʾˑÐËÆÓ ÎÌÅÕÆË‘À ˜ ÍÃÎÃÀÃÂÃËËÝ Ó Ñ ÎÃÄÆÊ ÈÎÆÏоɑžԑ, ÈÌÉÆ ÍÌ ÂÌÏÝÁËÃËˑ ÁÎ¾ËÆÕË̝ (ʾÈÏÆÊ¾ÉÚËÌ ÊÌÄÉÆÀ̝) ÈÌËÔÃËÐξԑ À ÎÌÅÕÆË‘ ÍÌÕÆË¾˜ÐÚÏÝ ÀÆÍ¾Â¾ËËÝ (ÈÎÆÏоɑžԑÝ) ÎÌÅÕÆËÃËÆÓ ÎÃÕÌÀÆË. ¢ÉÝ Å¾¿ÃÅÍÃÕÃËËÝ Ë¾Â‘ÇË̝ ÎÌ¿ÌÐÆ ÏÆÏÐÃÊÆ À оÈÌÊÑ ÎÃÄÆÊ‘ ËÃ̿ӑÂËÌ ÀξÓÌÀÑÀ¾ÐÆ ÊÌÄÉÆÀ‘ÏÐÚ À‘ÂÈɾ¾ËËÝ ÐÀÃÎÂÆÓ Õ¾ÏÐÆËÌÈ, Ýȑ ÀÆÍ¾ÉÆ Å ÎÌÅÕÆËÑ, ˾ ÈÌËÏÐÎÑÈԑÇËÆÓ ÃÉÃÊÃËÐ¾Ó ÂÆÏÐÆÉÝԑÇË̝ ÏÆÏÐÃÊÆ, ×Ì ÊÌÄà ÑËÃÊÌÄÉÆÀÆÐÆ  Í̾ÉÚÖÑ ÎÌ¿ÌÐÑ. 78 KPI Science News 2019 / 4 ¢ÉÝ ÍÃÎÃÀ‘ÎÈÆ ÊÌÄÉÆÀÌÏБ ÎÌ¿ÌÐÆ ÏÆÏÐÃÊÆ À ÎÃÄÆÊ‘ ÈÎÆÏоɑžÐÌξ ¿ÑÉÌ ÍÎÌÀÃÂÃËÌ ÏÃÎ‘Ü ÃÈÏÍÃÎÆÊÃËБÀ ˾ ÎÌÅÕÆË‘ NaCl Ñ À‘ÂÔÃËÐÎÌÀÌÊÑ ÌÂËÌÏÐÑÍÃËÃÀÌÊÑ ÂÆÏÐÆÉÝÐÌΑ [6]. 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ÈÉÜÕ¾˜ÐÚÏÝ ÂÀÆÁÑË ÂÆÏÐÆÉÝÐÌξ 1, ÝÈÆÇ Å¾¿ÃÅÍÃÕј ž¾ˑ Ì¿ÃÎÐÆ ÎÌÐÌξ ÂÆÏÐÆÉÝÐÌξ, о À¾ÈÑÑÊ-˾ÏÌÏÌÊ 7 ÌÏоËÌÀȾ ž¾Ց ¬ÏËÌÀ˾ ÊÃо ÂÌÏɑÂÄÃËËÝ — ÍÃÎÃÀ‘ÎȾ ÎÌ¿ÌÐÆ CFD (ÌÂËÌÏÐÑÍÃËÃÀÌÁÌ À‘ÂÔÃËÐÎÌÀÌÁÌ ÂÆÏÐÆÉÝÐÌξ ÀÆ¿ÑÓÌÀÌÁÌ ÏÈÆÍ¾ËËÝ) ÍÎÆ ÈÌËÔÃËÐÎÑÀ¾Ëˑ ÎÌÅÕÆËÑ NaCl. ¬ÏËÌÀˑ ž¾Ց ÂÌÏɑÂÄÃËËÝ:  ÂÌÏÉ‘ÂÆÐÆ ÅʑËÑ ÝÈÌÏБ ÌÐÎÆÊ¾ËÌÁÌ ÂÆÏÐÆÉÝÐÑ À ÍÎÌÔÃϑ ÈÌËÔÃËÐÎÑÀ¾ËËÝ ÎÌÅÕÆËÑ;  žґÈÏÑÀ¾ÐÆ Ê¾ÈÏÆÊ¾ÉÚËÌ ÊÌÄÉÆÀà ÈÌËÔÃËÐÎÑÀ¾ËËÝ;  ÂÌÏÉ‘ÂÆÐÆ, ÝÈ ¿ÑÂà ÅʑËÜÀ¾ÐÆÏÝ Ò‘ÅÆÈÌӑʑÕ˾ ÐÃÊÍÃξÐÑÎ˾ ÂÃÍÎÃÏ‘Ý À ÍÎÌÔÃϑ ÈÌËÔÃËÐÎÑÀ¾ËËÝ ÎÌÅÕÆËÑ NaCl. ¬ÍÆÏ ÍÎÆËÔÆÍÌÀ̝ ÏÓÃÊÆ ¬ÏËÌÀËÆÊÆ ÃÉÃÊÃËÐ¾ÊÆ ÃÈÏÍÃÎÆÊÃËоÉÚËÌÁÌ ÏÐÃ˾ (ÎÆÏ.1) ˜ À‘ÂÔÃËÐÎÌÀÆÇ ÌÂËÌÏÐÑÍÃËÃÀÆÇ ÂÆÏÐÆÉÝÐÌÎ (´¢) 1 (ÎÆÏ.2), ÐÃÎÊÌÃÉÃÈÐÎÆÕËÆÇ 3 t7 2 t4 t6 t3 t2 t1 t5 8 14 14 12 ¯ 15 ² ® 9 1 14 7 ³ÌÉÌÂ˾ À̾ ³ÌÉ. ¡¾Î. 11 6 15 5 13 ¥ 16 4 ÆÓ. Î-Ë ¢ 10 ® 15 15 16 ¥Ó ¨ ¥Á 10 ®ÆÏ. 1. ÎÆËÔÆÍÌÀ¾ ÏÓÃʾ ÃÈÏÍÃÎÆÊÃËоÉÚËÌÁÌ ÏÐÃ˾: 1 — À¾ÈÑÑÊËÆÇ À‘ÂÔÃËÐÎÌÀÆÇ ÂÆÏÐÆÉÝÐÌÎ; 2 — ÐÃÎÊÌÃÉÃÈÐÎÆÕËÆÇ ÐÃÍÉÌÀÆÇ ˾ÏÌÏ; 3 — ÐÃÍÉÌ̿ʑËËÆÈ (ÌÓÌÉÌÂÄÑÀ¾Õ); 4 — ˜ÊˑÏÐÚ ÀÆÓ‘ÂËÌÁÌ ÎÌÅÕÆËÑ; 5 — Å¿‘ÎËÆÈ ÂÆÏÐÆÉÝÐÑ; 6 — Èɾ;ËÎÃÁÑÉÝÐÌÎ ÄÆÀÉÃËËÝ ÏÆÏÐÃÊÆ ÀÆÓ‘ÂËÆÊ ÎÌÅÕÆËÌÊ; 7 — À¾ÈÑÑÊËÆÇ Ë¾ÏÌÏ; 8 — ґÉÚÐÎ; 9 — ÏÌÉÃʑÎ; 10 — ÃÉÃÈÐÎÌËˑ À¾ÁÆ; 11 — À¾ÈÑÑÊÃÐÎ; 12 — ÂÆÒÃÎÃËԑÇËÆÇ Ê¾ËÌÊÃÐÎ; 13 — ÂÆÏÐÆÉÝÐ ÂÉÝ Å¾ÍÌÀËÃËËÝ ÏÆÏÐÃÊÆ; 14 — ÎÌоÊÃÐÎÆ; 15 — ÈÉ¾Í¾ËÆ; 16 — ˜ÊËÌÏБ ÂÉÝ ÏÍÌÎÌÄËÃËËÝ ÏÆÏÐÃÊÆ 79 ɏȱɆȱɑɇȱ ɌȿɏɇɈɅɈȽȱȲ À ¾Í¾Î¾Ð‘ ÀÏоËÌÀÉܘÐÚÏÝ ËÃ̿ӑÂËÆÇ ÐÆÏÈ, ÝÈÆÇ À‘ÂÍÌÀ‘¾˜ ËÃ̿ӑÂË‘Ç ÐÃÊÍÃξÐÑΑ ÈÆÍ‘ËËÝ ÎÌÅÕÆËÑ. ¥ ˜ÊËÌÏБ 13 ÂÆÏÐÆÉÝÐÌÊ Å¾ÍÌÀËܘÐÚÏÝ ÓÌÉÌÂËÆÇ ÈÌËÐÑÎ, Ñ ÝÈÌÊÑ Å¾¿ÃÅÍÃÕјÐÚÏÝ ÔÆÎÈÑÉÝÔ‘Ý ÂÆÏÐÆÉÝÐÑ ÕÃÎÃÅ ÈÌËÂÃËϾÐÌÎ ÂÆÏÐÆÉÝÐÌξ 1, ÏÌÉÃʑΠ9, ÎÌоÊÃÐÎ 14, ÓÌÉÌÂËÑ ÏÐÌÎÌËÑ °°« 2, ÐÃÍÉÌ̿ʑËËÆÈ-ÌÓÌÉÌÂÄÑÀ¾Õ 3 о ÅËÌÀÑ ÈÌËÂÃËϾÐÌÎ ÂÆÏÐÆÉÝÐÌξ. °ÃÊÍÃξÐÑξ ÀÆÊ‘ÎÜÀ¾É¾ÏÝ Ë¾ ÀÓÌ‘ о ÀÆÓÌ‘ Å ÐÃÎÊÌ¿¾Ð¾ÎÝ ÍÌ Á¾ÎÝÕ‘Ç ( t1 t2 ) о ÓÌÉÌ (...truncated)


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Barabash Petro O., Solomakha Andrii S., Rifert Volodymyr G., Petrenko Valerii G., Usenko Volodymyr I., Boianivskyi Vladyslav P.. CRYSTALLIZATION OF A NaCl SOLUTION IN A VACUUM CENTRIFUGAL FILM DISTILLER, Scientific news of KPI, 2019, pp. 77-82,