SU865364A1

SU865364A1 - Flow mixing device

Info

Publication number: SU865364A1
Application number: SU782650993A
Authority: SU
Inventors: Николай Иванович Давыдов; Олег Павлович Кленов; Владимир Петрович Козлов; Виктор Александрович Остапенко; Дмитрий Дмитриевич Успенский; Юрий Владимирович Филатов
Original assignee: Специальное конструкторско-технологическое бюро катализаторов; Научно-исследовательский институт по удобрениям и инсектофунгицидам им.проф.Я.В.Самойлова; Череповецкий Химический Завод
Priority date: 1978-07-31
Filing date: 1978-07-31
Publication date: 1981-09-23

Description

Изобретение относится к оборудованию, применяемому для смешения потоков разных по температуре или концентрации, в частности при проведении каталитических реакицй в химической, нефтехимической и др. смежных облас- ⁵тях промышленности.The invention relates to equipment used for mixing streams of different temperature or concentration, in particular during the catalytic reakitsy in the chemical, petrochemical, and others. Oblas- ⁵ tyah related industries.

Известны смесители, состоящие из основного и подводящего трубопроводов, трубных досок и трубок смешения, в которых смешение осуществляется путем ввода в основной поток компонентов через отверстия в этих трубках [1 .]· .Known mixers, consisting of the main and supply pipelines, tube boards and mixing tubes, in which the mixing is carried out by introducing into the main stream of components through the holes in these tubes [1.] ·.

Основными недостатками этих смесителей являются неравномерное распределение компонентов по трубкам смешения и повышенное гидравлическое сопротивление.The main disadvantages of these mixers are the uneven distribution of components along the mixing tubes and increased hydraulic resistance.

Наиболее близким к предлагаемому является устройство для смешения потоков, содержащее основной и боковой подводящие трубопроводы,входную и выходную трубные доски с эжекторными трубками и расположенными кон2 центрически относительно них коническими соплами [2].Closest to the proposed is a device for mixing flows, containing the main and side supply pipelines, inlet and outlet tube boards with ejector tubes and conical nozzles arranged concentrically relative to them [2].

Недостатками известного устройства являются повышенные гидравлическое сопротивление и габариты устройства.The disadvantages of the known device are the increased hydraulic resistance and dimensions of the device.

Цель изобретения - снижение гидравлического сопротивления и уменьшение габаритов устройства.The purpose of the invention is to reduce hydraulic resistance and reduce the size of the device.

Поставленная цель достигается>тем, что конические сопла и эжекторные трубки расположены между трубными досками, при этом сопла закреплены на входной, а эжекторные трубки - на выходной трубных досках.This goal is achieved> by the fact that the conical nozzles and ejector tubes are located between the tube plates, while the nozzles are fixed to the inlet, and the ejector tubes to the outlet tube boards.

На чертеже изображен смеситель, общий вид.The drawing shows a mixer, General view.

Смеситель состоит из выходной 1 и входной 2 трубных досок, основного трубопровода 3 с равномерно расположенными по его сечению эжекторных ' трубок 4 смешения, конических сужающихся сопел 5 с центрирующими буртиками 6, наклонной стенки 7 и подводя4 ра диаметра газохода^ и направить их в межтрубное пространство теплообменника со средней температурой 130-140^С, что позволит предотвра₅ тить конденсацию 0$ и тем самым форсированную коррозию теплообменника. Гидравлическое сопротивление смесителя, устанавливаемого в газоходе, не превышает 40 мм вод.ст.The mixer consists of an outlet 1 and an inlet 2 pipe boards, a main pipe 3 with ejector mixing tubes 4 evenly spaced along its cross section, tapered tapering nozzles 5 with centering shoulders 6, an inclined wall 7 and supplying 4 duct diameters ^ and directing them into the annulus heat exchanger with an average temperature of 130-140 ^ C, which will prevent the condensation of $ 0 ₅ and thereby forced corrosion of the heat exchanger. The hydraulic resistance of the mixer installed in the duct does not exceed 40 mm water column

Предлагаемая констуркция смесителя, наряду с указанными положительными качествами, обеспечивает также смешение потоков с малыми перепадами давлежй,, что очень важно ₁₅ при проведении таких процессов как, например, получение серной кислоты, где избыточное давление в нагнетательной системе не превышает 0,20,3 атм.The proposed design of the mixer, along with the indicated positive qualities, also provides mixing of flows with small pressure drops, which is very important ₁₅ during such processes as, for example, the production of sulfuric acid, where the overpressure in the discharge system does not exceed 0.20.3 atm .

Claims

The invention relates to equipment used for mixing streams of different temperature or con. concentration, in particular, when conducting catalytic reactor in the chemical, petrochemical, and other related industries. Mixers are known, consisting of main and supply pipe piping and mixing tubes, in which mixing takes place by introducing into the main flow of components through openings in these tubes f 1 J. The main drawbacks of these mixtures are the uneven distribution of components through mixing tubes and higher hydraulic resistance. Closest to the present invention is a device for mixing streams, comprising main and side supply pipelines, inlet and outlet pipe plates with ejector tubes and conical nozzles located co-centrically relative to them. The disadvantages of the known device are the lower hydraulic resistance and dimensions of the device. The purpose of the invention is to reduce the hydraulic resistance and reduce the size of the device. The goal is achieved by the fact that the conical nozzles and ejector tubes are located between the tube plates, while the nozzles are fixed to the inlet and the ejector tubes to the exit tube plates. The drawing shows the mixer, a general view. The mixer consists of the output -t and inlet 2 pipe boards, the main pipeline 3 with the mixing ejector tubes 4 evenly spaced along its section, conical tapering nozzles 5 with centering shoulders 6, the inclined wall 7 and supply side lateral pipeline (diffuser) 8. The mixer works in the following way. The ejected flow is introduced through the side diffuser 8 into the main conduit 3 and the inclined wall 7 is evenly distributed along the ejection mixing tubes. Due to the difference in the areas of the mixing tubes and the outlet sections of the conical nozzles, the ejected flow is accelerated, and a vacuum is created behind the nozzle, which sucks the ejected flow into the mixing tubes. By organizing the movement of the main flow through parallel tubes on a model (p 400 mm), it was possible to obtain uneven mixing of flows in a concentration of no more than 25% over the length of one caliber of the main pipeline, which decreases with the further movement of flows. So, for a length of one gauge, followed by mixing tubes, it is 12%, and two calibers - 6%. To achieve this degree of unevenness of the mixed flows without the proposed mixer, the length of the main pipeline would be required, respectively 7-8, 14-16, 21-24 caliber of its diameter. Installing a mixer in a ha between the pre-heat and main heat exchangers in a 1000 t / d sulfuric acid production system to mix the main flow with temperature and the flow coming from intermediate ab with 70 ° C makes it possible to equalize the flow with temperature with uneven 12- 10% (the distance is 1-1.5 caliber of the diameter of the flue) and send them to the annular space of the heat exchanger with an average temperature of 130-140 ° C, which will prevent the condensation of Oj and thus the forced The heat transfer resistance of the mixer installed in the flue does not exceed 40 mm water column. The proposed design of the mixer, along with these positive qualities, provides also a mixture of flows with small pressure drops, which is very important when carrying out such processes as, for example, , production of sulfuric acid, where the overpressure in the injection system does not exceed 0.20, 3 atm. Formula of the invention A device for mixing the flows, containing the main and side supply pipes, bottom and outlet tube plates with ejector tubes and concentric nozzles that are concentrically relative to each other, about the fact that, in order to reduce flow resistance and reduce the size of the device, the cone nozzles and ejector tubes are located; between tube plates, with nozzles attached to the inlet and ejector tubes on the outlet tube plates. Sources of information taken into account in the examination 1.Patent of France No. 1267290, cl. In About f, 1960.

2. USSR patent number 13322, cl. On 01 F 5/04, 1930.

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