SU1272086A1

SU1272086A1 - Heat exchanger

Info

Publication number: SU1272086A1
Application number: SU853929134A
Authority: SU
Inventors: Александр Викторович Дорошенко; Анатолий Иванович Боровцев; Виктор Константинович Карлович; Михаил Михайлович Кологривов
Original assignee: Одесский Технологический Институт Холодильной Промышленности
Priority date: 1985-04-22
Filing date: 1985-04-22
Publication date: 1986-11-23

Abstract

Изобретение относитс к энергетическому и химическому машиностроению и может быть использовано в устройствах тепломассообменных апнаратов дл испарительного охлаждени жидкостей. Цель изобретени - интенсификаци процессов теплообмена . Теплообменна поверхность (ТП) 5 выполнена в виде винтовой спирали с шагом навивки 0,6-0,8 от диаметра шаров 6 насадки и установлена соосно корпусу 1 на опорной решетке 7. Процесс теплопередачи между ТП 5 и газожидкостной смесью интенсифицируетс за счет вибрационного воздействи шаров 6. При этом разрушаютс отложени , образуюш,иес на ТП 5. 1 з.п. -лы, 1 ил.The invention relates to power and chemical engineering and can be used in heat and mass transfer devices for evaporative cooling of liquids. The purpose of the invention is the intensification of heat exchange processes. The heat exchange surface (TP) 5 is made in the form of a helical spiral with a winding pitch of 0.6-0.8 from the diameter of the nozzle balls 6 and installed coaxially with the housing 1 on the support grid 7. The heat transfer process between the TP 5 and the gas-liquid mixture is intensified due to the vibratory effect of the balls 6. At the same time, deposits, forming a mixture on TP 5, are destroyed. 1 Cp lts, 1 il.

Description

Изобретение относится к энергетическому и химическому машиностроению и может быть использовано в устройствах тепломассообменных аппаратов, преимущественно для испарительного охлаждения жидкостей.The invention relates to energy and chemical engineering and can be used in devices of heat and mass transfer apparatuses, mainly for evaporative cooling of liquids.

Целью изобретения является повышение энергонапряженности теплообменника путем интенсификации процессов тепломассообмена.The aim of the invention is to increase the energy intensity of the heat exchanger by intensifying heat and mass transfer processes.

На чертеже приведен теплообменник, общий вид.The drawing shows a heat exchanger, General view.

Теплообменник содержит корпус 1, снабженный патрубком 2 подвода жидкости, газоподводящим патрубком 3, расположенным выше последнего газоотводящим патрубком 4 (на чертеже показан условно незачерненными стрелками), а также установленные в корпусе 1 трубчатую теплообменную поверхность 5 и шаровую насадку 6 с опорной решеткой 7. Последняя установлена на уровне нижней кромки газоподводящего патрубка 3, верхняя кромка которого расположена не выше верхней поверхности насадки 6, а теплообменная поверхность 5 выполнена в виде установленной соосно корпусу 1 на опорной решетке 7 винтовой спирали с шагом навивки, составляющим 0,6—0,8 от диаметра шаров насадки 6.The heat exchanger comprises a housing 1, equipped with a fluid supply pipe 2, a gas supply pipe 3, located above the last gas discharge pipe 4 (conditionally open arrows are shown in the drawing), as well as a tubular heat exchange surface 5 and a ball nozzle 6 with a support grid 7 installed in the housing 1. installed at the level of the lower edge of the gas supply pipe 3, the upper edge of which is located not higher than the upper surface of the nozzle 6, and the heat exchange surface 5 is made in the form installed coaxially to case 1 on the support grid 7 of a helical spiral with a winding pitch of 0.6-0.8 of the diameter of the balls of the nozzle 6.

Выходной участок патрубка 2 подвода жидкости размещен в газоподводящем патрубке 3.The output section of the pipe 2 fluid supply is placed in the gas supply pipe 3.

Теплообменник снабжен также каплеуловителем 8 и патрубком 9 отвода жидкости. Газоподводящий патрубок 3 расположен тангенциально относительно корпуса 1.The heat exchanger is also equipped with a droplet eliminator 8 and a pipe 9 for draining the liquid. The gas supply pipe 3 is located tangentially relative to the housing 1.

Теплообменник работает следующим образом.The heat exchanger operates as follows.

Газ поступает в корпус 1 через тангенциальный газоподводящий патрубок 3, при этом на входе к газу подмешивается жидкость, поступающая через патрубок 2 подвода жидкости. Образующийся внутри корпуса 1 газожидкостный «смерч» вовлекает шары насадки 6 во вращательное движение. Образуется высокотурбулизованная трехфазная система газ—жидкость—твердая насадка. Над действием центробежных сил насадка 6 и жидкость отбрасываются к боко вой поверхности корпуса 1. Шары насадки 6 теряют энергию движения и вновь попадают на опорную р.ешетку 7, а жидкость стекает по стенке корпуса 1 ее его нижнюю часть и удаляется через патрубок 9. Капли жидкости, увлекаемые газом, улавливаются каплеуловителем 8.The gas enters the housing 1 through the tangential gas supply pipe 3, while at the inlet to the gas is mixed liquid entering through the pipe 2 fluid supply. The gas-liquid tornado formed inside the housing 1 draws the balls of the nozzle 6 into the rotational movement. A highly turbulent three-phase gas – liquid – solid packing system forms. Over the action of centrifugal forces, the nozzle 6 and the liquid are thrown to the lateral surface of the housing 1. The balls of the nozzle 6 lose their energy of movement and again fall on the supporting runner 7, and the liquid flows along the wall of the housing 1 its lower part and is removed through the pipe 9. Drops liquids entrained in gas are captured by a droplet eliminator 8.

Процесс теплопередачи между теплообменной поверхностью 5 и газожидкостной смесью интенсифицируется за счет вибра10 ционного воздействия шаров насадки 6. При этом разрушаются отложения, образующиеся на теплообменной поверхности 5. При шаге навивки последней менее 0,6 диаметра шаров насадки 5 уменьшается поверхность _|5 механического контакта насадки 6 с теплообменной поверхностью 5, загромождается сечение газоподводящего патрубка 3, увеличивается сопротивления газовому потоку. При шаге навивки больше 0,8 диаметра шаров насадки 6 возможно застревание шаров 20 насадки 6 между витками теплообменной поверхности 5, а также снижается поверхность теплообмена.The heat transfer process between the heat exchange surface 5 and the gas-liquid mixture is intensified due to the vibrational action of the balls of the nozzle 6. In this case, the deposits formed on the heat exchange surface 5 are destroyed. When the winding pitch is less than 0.6, the diameter of the balls of the nozzle 5 decreases the surface _{| 5 of the} mechanical contact of the nozzle 6 with the heat exchange surface 5, the section of the gas supply pipe 3 is cluttered, the resistance to the gas flow increases. When the winding pitch is greater than 0.8 of the diameter of the balls of the nozzle 6, it is possible that the balls 20 of the nozzle 6 get stuck between the turns of the heat exchange surface 5, and the heat exchange surface also decreases.

Claims

The invention relates to power and chemical engineering and can be used in devices of heat and mass transfer apparatus, mainly for evaporative cooling of liquids. The aim of the invention is to increase the energy intensity of the heat exchanger through the intensification of heat and mass transfer processes. The drawing shows a heat exchanger, a general view. The heat exchanger includes a housing 1 equipped with a liquid supply pipe 2, a gas supply pipe 3, a gas outlet pipe 4 located above the latter (shown in the drawing with conditionally unfixed arrows), as well as a tubular heat exchange surface 5 installed in the housing 1 and a spherical nozzle 6 with a supporting grid 7 The latter is installed at the level of the lower edge of the gas supplying nozzle 3, the upper edge of which is located no higher than the upper surface of the nozzle 6, and the heat exchange surface 5 is designed as an installed coaxial but the housing 1 on the supporting grid 7 of the helical spiral with a winding pitch of 0.6-0.8 of the diameter of the nozzle balls 6. The outlet section of the liquid inlet 2 is placed in the gas supplying pipe 3. The heat exchanger is also equipped with a droplet separator 8 and a branch of the outlet 9 fluid. The gas supply pipe 3 is located tangentially with respect to the housing 1. The heat exchanger operates as follows. The gas enters the housing 1 through the tangential gas supply pipe 3, while the liquid entering the gas through the pipe 2 of the liquid supply is mixed in at the gas inlet. The gas-liquid "tornado" formed inside the housing 1 draws the nozzle balls 6 into rotational motion. A highly turbulent three-phase gas-liquid-solid nozzle system is formed. Over the action of centrifugal forces, the nozzle 6 and the liquid are thrown to the side surface of the housing 1. The nozzle balls 6 lose their moving energy and re-enter the supporting grid of the grid 7, and the liquid flows along the wall of the housing 1 to its lower part and is removed through the pipe 9. Liquid droplets entrained in gas are trapped by the drip catcher 8. The heat transfer process between the heat exchange surface 5 and the gas-liquid mixture is intensified due to the vibratory effect of the nozzle balls 6. At the same time, the deposits that form on the heat exchange are destroyed surface 5. In the last step, the winding diameter of less than 0.6 balls nozzle 5 decreases the mechanical contact surface of the nozzle 6 with the heat exchanging surface 5, zagromozhdaets section Sheha gas inlet pipe 3 is increased resistance to gas flow. When the winding pitch is greater than 0.8 of the diameter of the balls of the nozzle 6, the balls of the nozzle 6 may get stuck between the turns of the heat exchanging surface 5, and the heat exchange surface also decreases. Claims 1. A heat exchanger comprising a housing equipped with a liquid supply nozzle, a gas supply and a gas outlet located above the latter, as well as a tubular heat exchange surface installed in the housing and a spherical nozzle with a support grid, characterized in that, in order to increase the energy intensity by intensification of heat and mass transfer processes, the support grid is installed at the level of the lower edge of the gas supplying nozzle, the upper edge of which is located not above the upper surface of the top ki, and the heat exchange surface is made in the form of a coaxially mounted body on the supporting grid of the spiral spiral with a winding pitch of 0.6-0.8 of the diameter of the nozzle balls.

2. A heat exchanger according to claim 1, characterized in that the outlet section of the liquid supply nozzle is placed in the gas supply pipe of the nozzle.