SU814411A1

SU814411A1 - Ejection venturi tube

Info

Publication number: SU814411A1
Application number: SU792786858A
Authority: SU
Inventors: Алексей Иванович Толочко; Галина Матвеевна Каненко; Марк Матвеевич Черепинский; Юрий Леонидович Коваленко; Дмитрий Прохорович Галкин; Иван Харитонович Ромазан; Владимир Николаевич Ермолаев; Александр Абрамович Тверской
Original assignee: Магнитогорский Металлургический Kom-Бинат
Priority date: 1979-04-20
Filing date: 1979-04-20
Publication date: 1981-03-23

Description

(54) ЭЖЕКЦИОКНАЯ ТРУБА ВЕНТУРИ(54) VENTURI HEAT PIPE

Изобретение относитс к технике мокрой очистки газов от пыли и химических вредностей, и может быть использовано в черной металлургии, химической и других отрасл х промышленности ,This invention relates to a technique for the wet cleaning of gases from dust and chemical hazards, and can be used in ferrous metallurgy, chemical and other industries,

Известно устройство дл очистки газов типа трубы Вентури, включающее диффузор и конфузор, внутри которого по оси установлен сердечник дл регулировани проходного сечени , снабженный приспособлением дл его перемещени в вертикальном направлении, отсос газа производитс нагнетателем 1 ,A device for cleaning gases such as a Venturi tube is known, which includes a diffuser and a confuser, inside which an axis for adjusting the flow section is installed along the axis, equipped with a device for moving it in a vertical direction, the gas is suctioned by a supercharger 1,

Така конструкци позвол ет регулировать скорость газового потока в трубе Вентури,This design allows you to adjust the gas flow velocity in the venturi tube,

Однако, при больших объемах очищаемых газов требуетс создание специального помещени дл нагнетател в св зи с чем возрастают габариты и стоимость установки. Это устройство не предназначено дл эжектировани газового потока и не учитывает таких факторов, как организацию камера смещени оптимальных размеров в услови х измен ющегос проходного сечени и оптимального размещени сопел дл подачи рабочей жидкости.However, with large volumes of gas to be cleaned, it is necessary to create a special room for the supercharger in connection with which the dimensions and cost of installation increase. This device is not intended for the ejection of a gas stream and does not take into account such factors as the organization of the chamber of displacement of optimal sizes under the conditions of varying flow area and the optimal placement of nozzles for supplying the working fluid.

Наиболее близким по технической сущности к предлагаемому в.п етс эжекционна труба Вентури, вк.пючагоща приемную камеру, внутри которой установлены сопла Лавал дл подачи перегретой воды, камеру смещени , выполненную в виде конфузора, диффузор . В качестве рабочей жидкости используют воду с температурой 1040 288°С и давлением 3,5-49 атм, котора подаетс в трубу Вентури через сопло специальной.формы. В сопле част-ь воды вскипает, превраща сь в пар, что обуславливает хорошее дрб5 ление жидкости, большую скорость выхода из сопла, очистку газа от субмикро-нной пыли на 96-99,95 2,The closest in technical essence to the proposed installation is a Venturi ejection tube, including a receiving chamber, inside which are installed Lawal nozzles for supplying superheated water, a displacement chamber made in the form of a confuser, and a diffuser. Water with a temperature of 1040–288 ° C and a pressure of 3.5–49 atm is used as a working fluid, which is fed into the Venturi tube through a nozzle of a special form. In the nozzle, the water part boils, turning into steam, which leads to a good liquid flow, a high exit velocity from the nozzle, gas cleaning from submicro-micron dust by 96-99.95 2,

Недостатком предлагаемой конструкции эжекционной трубы Вентури вл 0 етс невозможность регулировать скорость газа в камере смещени , котора вл етс определ ющим фактором в процессе эжекции и очистки газов.The disadvantage of the proposed design of an ejection venturi tube is the inability to regulate the gas velocity in the displacement chamber, which is a determining factor in the process of ejection and gas cleaning.

Цель изобретени - обеспечение The purpose of the invention is to provide

5 оптимального эффекта эжекции при переменных расходах газа.5 optimal ejection effect with variable gas flow rates.

Claims

The goal is achieved by the fact that the proposed Venturi tube is provided with a core for adjustment. a passage section made in the form of an inverse cone mounted along the axis of the confuser with the possibility of vertical movement, and the length of the generator cone is equal to 2 4 diameters of the output section of the displacement chamber. The ratio of the area of the displacement chambers to the total area of the throat sections of the Laval nozzles is 500 to 2000. In addition, the Lawal nozzles are installed around the circumference of the receiving chamber, and the angle between them in the horizontal plane is about (100,300) fJJ ;. radian, where fo5m is the total area of throat sections of Laval nozzles in mm. It is advisable that the distance from the cut of the Laval nozzle to the cone of the core is 2-10 1, where 1 is the distance from the confuser wall to the cone of the core in its largest section. The drawing shows a Venturi tube, a longitudinal section. The venturi vent consists of a receiving chamber 1, a displacement chamber 2, made in the form of a confuser. Inside the displacement chamber 2 an axially mounted conical core is provided with a device 4 for displacement in the vertical direction. The displacement chamber has an annular channel of equal section with a length equal to 2-4 diameters of the output section of the displacement chamber formed by the core, fixed on average by the size of the cross-sectional area of the displacement chamber and the inner surface of the confuser. The length of the channel is essentially equal to the length of the cone. A diffuser 5 is installed behind the displacement chamber. For supplying the working fluid to the venturi c. Laval nozzles 6, connected by a common collector 7, are installed in the receiving chamber 1. Valves 8 are installed between the Laval nozzle 6 and collector 7. Superheated water is supplied to the collector 7 with a temperature of 140-220 ° and a pressure of 8-25 atm, which falls into the Lava 6 nozzles, partially boils. The resulting steam crushes the water and the dispersed steam line into an emulsion, then at high speed into the displacement chamber 2, creates an ejecting effect by sucking dusty gases through the receiving chamber 1 in displacement chamber 2, where the gas is cleaned with dispersed water. After the displacement chamber 2, the purified gases enter the diffuser 5, where the gas flow is equalized. The core 3 is installed in the vertical direction with the help of method 4. The required number of Laval nozzles 6 is turned on with the help of valves 8. The optimal ejection capacity of the Venturi and effective cleaning of gases is achieved due to the fact that the displacement chamber has a circular channel equal to the section 2–4 diameters of the output segmentation of the displacement chamber, formed by an adapter fixed at the average value of the cross-sectional area of the displacement amer, and the inner surface of the confuser, and also due to the fact that n are all vyieukazannye ratios. The proposed Venturi ejection pipe has the following advantages: 1. It permits to optimize the process of ejection and gas cleaning at a variable volume of gas to be cleaned, while reducing the cost of gas cleaning. 2. Allows cleaning of large volumes of gases in a compact gas cleaning unit. Claim 1. A venturi vent pipe, including a receiving chamber, inside which are installed Laval nozzles for supplying superheated water, a displacement chamber, made in the eudes of a confuser, diffuser, in order to ensure an optimal ejection effect at variable costs of Iaz, provided with a core for adjusting: a passage section made from a reverse cone installed along a cons / pattern axis with the possibility of:; displacements along the vertical, this forming the length of the cone is 2-4 d; - output meter echeni displacement chamber. 2. A Venturi tube according to claim 1, characterized in that the ratio of the area of the displacement chamber and the total area of the throat sections of the Laval nozzles is 500 f 2000., 3. The Venturi tube according to claim 1-2, about 1 and 2 If the Laval nozzles are installed around the circumference of the receiving chamber, the angle between them in the horizontal plane is equal to (100 - 300) radians, where fo is the total area of throat sections of Laval nozzles in mm. 4. Venturi tube according to p. 1-3, about T l and h y and with that, h is the distance from the cut of the Lawal nozzle to the cone of the core is -10 1, where 1 distance from the confuser wall to the cone of the core at its greatest cross section. Sources of information taken into account during the examination 1. USSR author's certificate number 428766, cl. B 01 D 47/10, i972.

2. German patent 2035683, class, 1 2 e 2 / O 1, 19 7 4.

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