SU876050A3

SU876050A3 - Gas cleaning device

Info

Publication number: SU876050A3
Application number: SU762417314A
Authority: SU
Inventors: Мэрвин Шауэр Джон; Джон Шауэр Деннис
Original assignee: За витель Иностранцы (США) °1 ; 16 ...
Priority date: 1975-11-05
Filing date: 1976-11-04
Publication date: 1981-10-23
Also published as: FR2330440B1; FR2330440A1

Abstract

Process for washing damaging components out of a gas stream has the features:- (a) putting a wash liquor into closed vessel up to a predetermined height, (b) pumping a gas stream down into the wash liquor in an essentially vertical direction close to the vessel base. The velocity should be >270m/min. so that the gas forms bubbles in the liq., (c) the gas bubbles impinge against a baffle plate after rising through the liquor, (d) the washed gas is then removed from the vessel. A liquor with a pH of about 5.0 is used, e.g. phosphoric acid or a combination of phosphoric acid and sulphuric acid H2SO4. Appts. is for use in scrubbing out colours or toxic components from exhaust gas streams esp. in vapours from mfr. of ores for casting moulds, from arc welding and from many other industrial processes. Process either removes or chemically alters the undesirable components.

Description

Изобретение относится к конструкциям устройств для очистки газов от примесей и может быть использовано' для очистки отходящих газов,образующихся при изготовлении литейных стерж ней и дуговой сварке, от ядовитых компонентов.The invention relates to constructions of devices for cleaning gases from impurities and can be used for cleaning exhaust gases from the manufacture of foundry cores and arc welding from toxic components.

Известно устройство для очистки газов от примесей, содержащее вертикальный цилиндрический корпус с днищем и крышкой, в которой выполнено центральное отверстие,выхлопную трубу, закрепленную в центральном отверстии ,газораспределительную трубу,распор ложенную внутри корпуса, и штуцеры ввода и вывода жидкого реагента [1].A device for cleaning gases from impurities, containing a vertical cylindrical body with a bottom and a cover, which has a Central hole, an exhaust pipe fixed in the Central hole, a gas distribution pipe located inside the housing, and fittings for the input and output of a liquid reagent [1].

Недостатком известного устройства является низкая эффективность процесса очистки из-за недостаточного времени контактирования газа с жидким реагентом.A disadvantage of the known device is the low efficiency of the cleaning process due to insufficient time of contacting the gas with a liquid reagent.

С целью интенсификации процесса путем увеличения времени контактирования газа с жидким реагентом, устройство снабжено размещенной внутри корпуса под крышкой центральной кольцевой отражательной перегородкой, отделяющей от корпуса кольцевой газовый канал, а выходной конец газорас^ 39 са _5 <11)876050 (51 )М. Кл.³ In order to intensify the process by increasing the time of contacting the gas with a liquid reagent, the device is equipped with a central annular reflective wall located inside the housing under the cover, separating the annular gas channel from the housing, and the gas outlet end ^ 39 ca _5 <11) 876050 (51) M. Cl. ³

В 01,D 47/02 (53) УДК 66.074.511 (088.8) *B 01, D 47/02 (53) UDC 66.074.511 (088.8) *

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пределительной трубы расположен около днища под отражательной перегородкой по оси корпуса.the distribution pipe is located near the bottom under the baffle along the axis of the housing.

Дополнительно устройство снабжено вентилятором с нагнетательным патрубком, соединенным с входным концом газораспределительной трубы.Additionally, the device is equipped with a fan with a discharge pipe connected to the inlet end of the gas distribution pipe.

На фиг. 1 изображен общий вид устройства с частичными разрезами в аксонометрической продольный разрез ства. ' проекции; на фиг.2 общего вида устройочистки газов от вертикальный цилинУстройство для примесей содержит дрический корпус 1 с днищем 2 и крышкой 3, в· которой выполнено центральное отверстие 4, выхлопную трубу 5, закрепленную в центральном отверстии 4, газораспределительную трубу 6/ расположенную внутри корпуса, размещенную внутри корпуса под крышкой 3 центральную кольцевую отражательную перегородку 7, отделяющую от корпуса кольцевой газовый канал 8. Выходной конец 9 газораспределительной трубы 6 расположен около днища 2 под отражательной перегородкой 7 по оси корпучIn FIG. 1 shows a general view of a device with partial cuts in axonometric longitudinal section. 'projection; figure 2 of a General view of the gas purification from vertical cylinders The device for impurities contains a drums housing 1 with a bottom 2 and a cover 3, in which a central hole 4 is made, an exhaust pipe 5 fixed in the central hole 4, a gas distribution pipe 6 / located inside the housing, located inside the housing under the lid 3, the Central annular reflective partition 7, separating the annular gas channel 8 from the housing. The output end 9 of the gas distribution pipe 6 is located near the bottom 2 under the reflective partition 7 along the axis of the corpus

Дополнительно устройство снабжеПсГ вентилятором 10 с нагнетательным патрубком 11, соединенным с входным концом 12 газораспределительной трубы 6.Additionally, the device is equipped with a PSG fan 10 with a discharge pipe 11 connected to the inlet end 12 of the gas distribution pipe 6.

Устройство работает следующим образом.The device operates as follows.

В процессе очистки газ, подлежащий обработке', подают через шланг 13, сжимают и продувают с большой скоростью с помощью турбинного вихревого венти- . лятора 10 через трубу 6. Почти во всех операциях газовый поток, подлежащий .очистке, не является столь мощным, чтобы на выходе трубы 6 создать скорость газа, превышающую критическую. В тех случаях,когда для осуществления необходимых химических* реакции необ- 1S ходимо присутствие кислорода, поток отработанного газа разбавляют большим количеством воздуха.Поэтому,практически во всех операциях желательной является добавка в газовый поток дос- 20 таточного количества воздуха для обеспечения необходимого объема газа,позволяющего получить на выходе трубы 6 требуемую скорость газа и достаточное количество кислорода для протекция окислительных реакций. Газовый поток, поступающий в трубу .6, . подается из выходного конца 9 трубы 6 в центральную часть корпуса несколько выше днища 2. Очень высокая скорость и мощность газового потока приводят к образованию в промывочной жидкости маленьких гомогенных . пузырьков диаметром 3,175 - 9,525 мм, что существенно увеличивает поверхность контактирования газа и жидкое- ТИ. .During the cleaning process, the gas to be treated is fed through a hose 13, compressed and blown at high speed using a turbine vortex valve. the radiator 10 through the pipe 6. In almost all operations, the gas stream to be cleaned is not so powerful as to create a gas velocity exceeding the critical velocity at the outlet of the pipe 6. In cases where oxygen is required to carry out the necessary chemical reaction * 1S, the exhaust gas stream is diluted with a large amount of air. Therefore, in almost all operations it is desirable to add enough air to the gas stream to provide the necessary gas volume, allowing to obtain at the outlet of the pipe 6 the required gas velocity and a sufficient amount of oxygen for the flow of oxidative reactions. The gas stream entering the pipe .6,. It is supplied from the outlet end 9 of the pipe 6 to the central part of the housing slightly higher than the bottom 2. A very high speed and power of the gas flow lead to the formation of small homogeneous in the washing liquid. bubbles with a diameter of 3.175 - 9.525 mm, which significantly increases the contact surface of the gas and liquid - TI. .

Прохождение газа через жидкость в том месте, где газ вытесняется из трубы 6, образуются довольно большие пузырьки за счет сильного выталкива- до ния газа в жидкость. Эти большие пузырьки быстро исчезают, образуя от-, дельные более мелкие пузырьки, которые быстро поднимаются из нижней части корпуса под небольшим углом к его основной оси. Пузырьки двигаются вверх пока не достигают перегородки 7. Здесь перегородка 7 выполняет функции отражателя и работает как ударная стенка, о которую ударяются _ быстро поднимающиеся пузырьки газа.The passage of gas through the liquid at the place where the gas is displaced from the pipe 6, rather large bubbles are formed due to the strong expulsion of the gas into the liquid. These large bubbles quickly disappear, forming separate, smaller bubbles that quickly rise from the bottom of the body at a slight angle to its main axis. The bubbles move up until they reach the partition 7. Here, the partition 7 acts as a reflector and acts as a shock wall, which is hit by rapidly rising gas bubbles.

Далее, после упругого столкновения с перегородкой 7 и в соответствии с формой кольцевого канала 8, газ направляется к боковым стенкам корпуса. То есть, после того, как пу-. ⁵⁵ зырьки газа ударяются об перегородку 7, газ Имеет тенденцию двигаться по , направлению к кольцевому каналу 8. Когда пузырьки достигают боковых стенок корпуса вблизи кольцевого ка- до нала 8, небольшая часть газа откло-г. няется наружу на верхнюю часть перегородки 7, тогда как остальной газ циркулирует вниз, по направлению к днищу 2 и снова вверх. 65Further, after an elastic collision with the partition 7 and in accordance with the shape of the annular channel 8, the gas is directed to the side walls of the housing. That is, after pu-. ⁵⁵ gas bubbles hit the partition 7, gas tends to move in the direction of the annular channel 8. When the bubbles reach the side walls of the housing near the annular channel 8, a small part of the gas is deflected. flows outward to the upper part of the partition 7, while the rest of the gas circulates downward, towards the bottom 2 and again upward. 65

Размеры корпуса , скорость газового потока на выходном конце 9 и состав промывочной жидкости могут меняться в зависимости от состава газа, подлежащего очистке.The dimensions of the housing, the gas flow rate at the outlet end 9, and the composition of the flushing fluid may vary depending on the composition of the gas to be cleaned.

Выходная скорость газового потока у конца 9 трубы б должна быть такой, чтобы частицы газа разгонялись до.' достаточно высокой скорости, чтобы приобрести запас кинетической энергии, достаточный для создания необхо*димой турбулентности и эффективной .промывки, а также для осуществления в случае необходимости,, химического взаимодействия между газом и жидкостью.'The output velocity of the gas stream at the end 9 of pipe b must be such that the gas particles accelerate to.' high enough speed to acquire a supply of kinetic energy sufficient to create the necessary * turbulence and effective flushing, as well as to carry out, if necessary, a chemical interaction between gas and liquid.

Далее очищенный газ выводится из корпуса через центральное отверстие 4 и выхлопную трубу 5.Next, the purified gas is discharged from the housing through the Central hole 4 and the exhaust pipe 5.

Предлагаемое устройство может быть использовано во многих промышленных процессах,происходящих с образованием загрязненных отходящих газов, и особенно тех ядовитых газов, которые необходимо подвергнуть химическому превращению прежде чем вымывать, из газового потока.The proposed device can be used in many industrial processes that occur with the formation of contaminated exhaust gases, and especially those toxic gases that must be chemically converted before being washed out of the gas stream.

Размеры газораспределительной тру,бы могут изменяться с изменением длины и могут быть использованы один или больше устройств для улавливания конкретных ядовитых компонентов. Далее, в корпусе вблизи выхода из газораспределительной трубы может быть установлен высоковольтный электрод, который будет ионизировать поступающий газ для активации быстрой реакции, или химический, или другие . катализаторы могут быть добавлены для активации необходимых химических реакций, в изобретении могут быть также использованы измерительные приспособления, такие как измеритель pH и вакуумметр.The dimensions of the gas distribution system could vary with the length and one or more devices could be used to capture specific toxic components. Further, in the housing near the outlet of the gas distribution pipe, a high-voltage electrode can be installed, which will ionize the incoming gas to activate a quick reaction, or chemical, or others. catalysts can be added to activate the necessary chemical reactions; measuring devices such as a pH meter and a vacuum gauge can also be used in the invention.

Кроме того, изобретение позволяет использовать такие установки, соединенные последовательно, для обработки газового потока различными химическими соединениями в промывочной жидкости при раздельном вымывании различных ядовитых компонентов.In addition, the invention allows the use of such plants, connected in series, for treating a gas stream with various chemical compounds in a washing liquid while separately washing out various toxic components.

Claims

(54) DEVICE FOR CLEANING GASES The invention relates to the construction of devices for cleaning gases from impurities and can be used for cleaning the exhaust gases formed in the manufacture of cores and arc welding, from components. A device for purifying impurity gases C5T is known, comprising a vertical cylindrical body with a bottom and a lid in which a central opening is made, an exhaust pipe fixed in the central hole, a gas distribution pipe located inside the body, and fittings for liquid reagent inlet and outlet 1. The disadvantage The known device is the low efficiency of the cleaning process due to the insufficient time of contacting the gas with the liquid reagent. In order to intensify the process by increasing the contact time The gas is equipped with a liquid reagent, the device is equipped with a central ring baffle located inside the body under the cover, which separates the annular gas channel from the body, and the output end of the gas distribution pipe is located near the bottom under the baffle wall along the body axis. Additionally, the device is equipped with a fan with a discharge pipe connected to the inlet end of the gas distribution pipe. FIG. 1 shows a general view of the device with partial cuts in axonometric projection; Fig.2 is a longitudinal section of an overall view of the device. . .. A device for cleaning gases from impurities contains a vertical cylindrical body 1 with a bottom 2 and a lid 3 In which a central opening 4 is made, an exhaust pipe 5 fixed in the central opening 4, a gas distribution pipe 6 located inside the housing located inside the housing under the cover 3, a central annular reflective partition 7 separating the annular gas channel 8 from the housing. The output end 9 of the gas distribution pipe b is located near the bottom 2 under the radial partition 7 along the corpus axis. The device is equipped with a self-contained fan 10 with a discharge pipe 11 connected to the inlet end 12 of the gas distribution pipe 6. The device works in the following way. In the purification process, the gas to be treated is fed through itang 13, compressed and blown out at high speed with the help of a turbine vortex fan 10 through pipe 6. Almost all of the oxygen in the gas flow to be cleaned is not so powerful that the output of the pipe 6 to create a gas velocity exceeding the critical. In those cases when the presence of oxygen is necessary for carrying out the necessary chemical reactions; the spent stream is diluted with a large amount of air. Therefore, in almost all operations, it is desirable to add enough air to the liver flow It is necessary to obtain the required gas velocity and sufficient oxygen for the oxidative reactions to proceed at the pipe outlet. The gas flow entering the pipe. B. It is supplied from the outlet end 9 of the pipe 6 to the central part of the body a little higher. The bottom 2 is very high and the gas flow rate leads to the formation of small homogeneous flushing liquid. bubbles with a diameter of 3.175 - 9.525 mm, which significantly increases the surface of contact between gas and liquid,. , . . The passage of gas through the liquid in the place where the gas is expelled from the pipe 6, rather large bubbles are formed due to the strong ejection of the gas into the liquid. These large bubbles quickly disappear, forming from -. efficient smaller bubbles that quickly rise from the bottom. . . parts of the body at a small angle to its main axis. The bubbles move upward until they reach the partition wall 7, where the partition wall 7 acts as a reflector and works like a shock wall that is being struck by rapidly rising gas bubbles. Further, after an elastic collision with the partition 7 and in accordance with the shape of the annular channel 8, the gas is directed to the side walls of the housing. That is, after. The gas bubbles hit the barrier 7, the gas tends to move in the direction of the annular channel 8. When the bubbles reach the side walls of the casing near the annular channel 8, a small part of the gas is open. outside the upper part of the partition 7, while the rest of the gas circulates downwards towards the mouth 2 and up again, the dimensions of the body, the velocity of the gas flow at the outlet end 9 and the composition of the washing liquid may vary depending on the composition of the gas to be cleaning up. The output gas flow rate at the end 9 of the pipe b should be such that the gas particles accelerate to. sufficiently high speed to acquire a stock of kinetic energy sufficient to create the necessary turbulence and efficient washing, as well as to carry out, if necessary, chemical interaction between the gas and the liquid. Further, the purified gas is removed from the housing through the central opening 4 and the exhaust pipe 5. The proposed device can be used in many processes that occur with the formation of contaminated exhaust gases, and especially those poisonous gases that must be subjected to chemical transformation before washing away from the gas stream. The dimensions of the gas distribution pipe could vary with the change in LENGTH and one or more devices could be used to trap specific poisonous components. Further, a high-voltage electrode can be installed in the housing near the outlet of the gas distribution pipe, which will ionize the incoming gas to activate a fast reaction, or chemical, or others. catalysts can be added to activate the necessary chemical reactions, and measurement tools such as a pH meter and vacuum gauge can also be used in the invention. In addition, the invention permits the use of such plants, connected in series, for treating the gas flow with various chemical compounds in the washing liquid, with separate leaching of the various poisonous components. Claim 1, A device for cleaning gases from impurities, comprising a vertical cylindrical body with a bottom and a clip / in which a central opening is made, an exhaust pipe, a pipe fixed in the central opening, a gas distribution pipe located inside the housing, and a nipple (and reagent, characterized in that, in order to intensify the process by increasing the time of contact of the gas with the liquid reagent, it is provided with a gas placed inside

a lid with a central annular reflective partition separating the annular gas channel from the body, and the output end of the gas distributing coward is located near the bottom under the baffle wall along the axis of the body. . .

2. The device according to claim 1, of which it is supplied with a fan with a discharge nozzle connected to the inlet end of the gas distribution rpyGu.

Sources of information taken into account in the examination

1. US patent W 37565 wo / Cl. 261 123, 1973.

W