SU948412A1

SU948412A1 - Heat mass exchange apparatus

Info

Publication number: SU948412A1
Application number: SU792757445A
Authority: SU
Inventors: Олег Синанович Чехов; Татьяна Ивановна Бондарева; Михаил Георгиевич Беренгартен; Надежда Николаевна Гольтякова; Наталья Евгеньевна Николайкина; Юрий Георгиевич Пикулин; Борис Тихонович Васильев; Анатолий Георгиевич Воротников; Людмила Ивановна Брагина; Татьяна Александровна Соловейкина
Original assignee: Московский Ордена Трудового Красного Знамени Институт Химического Машиностроения
Priority date: 1979-04-20
Filing date: 1979-04-20
Publication date: 1982-08-07

Description

Изобретение относитс к массообменным аппаратам дл проведени процесса осушки и отдувки сернистого газа при производстве серной кислоты под давлениемThe invention relates to a mass transfer apparatus for carrying out the process of drying and stripping sulfur dioxide in the production of sulfuric acid under pressure.

При производстве серной кислоты широко примен ютс массообменные аппараты, дл эффективной работы которых необходимо создание значительных плотностей орошени , что приводит к повьпиению энергозатрат на циркул цию абсорбента и к повышению гидравлического сопротивлени аппарата И .In the production of sulfuric acid, mass transfer devices are widely used, for their effective operation it is necessary to create significant irrigation densities, which leads to increased energy consumption for the circulation of the absorbent and to an increase in the hydraulic resistance of the device I.

К предлагаемому аппарату наиболее близок масообменный аппарат, включающий корпус с установленными по его высоте контактными тарелками с переливными устройствами, выполненными в виде патрубков с отбойными дискамитарелками с двум зонами контакта фаз 2 .The masoobmen apparatus is the closest to the proposed apparatus, including a case with contact plates mounted at its height with overflow devices made in the form of nipples with baffle plates with two zones of contact of phases 2.

При этом плато тарелки разбито на :несколько самосто тельно функционирующих элементов, в центре которых установлены переливные устрой,ства,In this case, the plateau of the plate is broken down: several independently functioning elements, in the center of which there are overflow devices,

В св зи с тем, что на тарелках должны быть одновременно проведены процессы осушки воздуха и отдувки сернистого газа в услови х ввода наDue to the fact that the plates must be simultaneously carried out the processes of air drying and stripping of sulfur dioxide in the conditions of input to

тарелку воды, моногидрата или олеума, в .таком массообменном аппарате нельз создать равномерное температурное поле, что приведет к локальным разогревам кислоты с последующей за этим генерацией тумана. Кроме уого, локальное повышение температуры за счет смешени воды с кислотой на плато тарелки будет способствовать a plate of water, monohydrate, or oleum in a mass transfer apparatus cannot create a uniform temperature field, which will lead to localized heating of the acid, followed by this generation of mist. In addition, a local temperature increase due to the mixing of water with acid on the plateau will contribute

10 интенсивной коррозии, что приведет к разрушению массообменных устройств. Целью изобретени вл етс обеспечение возможности осуществлени процесса осушки воздуха и отдувки 10 intense corrosion, which will lead to the destruction of mass transfer devices. The aim of the invention is to enable the process of air drying and blowing.

15 сернистого газа в производстве серной кислоты под давлением при создании равномерного пол температур на плато тарелки.15 sulfur dioxide in the production of sulfuric acid under pressure while creating a uniform floor temperature on the plateau plate.

Поставленна цель достигаетс The goal is achieved

20 тем, что тепломассообменный аппарат, содержащий корпус с установленными по его высоте тарелками и переливными устройствами, выполненными в виде патрубков с отбойными дисками под ни25 ми, снабжен средством дл ввода реагента , выполненным в виде коллектора с соплами, расположенными над переливными патрубками соосно им, а внутри патрубков по оси смонтированы 20 in that the heat and mass transfer apparatus, comprising a housing with plates mounted along its height and overflow devices made in the form of branch pipes with baffle plates below the bottom, is provided with a means for introducing the reagent made in the form of a collector with nozzles located above the overflow branch pipes coaxially with them, and inside the pipes are mounted along the axis

Claims

30 fencing elements. This embodiment of the apparatus permits intensive mixing of the acid with water (monohydrate, oleum), as a result of which the temperature of the mixture inside the overflow pipe rises. The liquid film flowing from the slits of the latter is in contact with air. Heating increases the conditions for desorption of sulfur dioxide from the acid dissolved in it. During the contact process, the acid is cooled and the sulfuric acid is released to the bubbling layer of the downstream plate, thus eliminating the possibility of local temperature in this layer, and therefore, the formation of mist and intensive corrosion of the plateau are excluded. The drawing shows schematically a heat and mass transfer apparatus, a longitudinal section, in case 1 of the size of the circuit plate 2 with two phases, on the plateau of which are overflow devices 3, which are the sockets with baffle disks below them, forming a slit with the lower edge of the nozzle. The upper edge of the overflow device is located above the plate of the plate. In the inter-tray space there is mounted a reagent injecting agent, made in the form of a collector 4, through which water (monohydrate, oleum) is fed. In the collector, the lower edge of the nozzle 5f is positioned above the upper edge of the overflow device. Inside the latter coaxially mounted baffle elements 6 with a flat or conical surface. The interaction of gas and liquids in the apparatus proceeds in the following sequence. The air is in contact with the drying acid on the plates of the apparatus, and at the same time the processes of its drying and desorption from the acid of the dissolved sulfur dioxide proceed. In order to intensify the desorption process, the temperature of the acid is increased by diluting the acid with water or diluting the monohydrate (oleum) with a drying acid. The process of drying and stripping sulfurous gas in the conditions of water injection proceeds as follows. Pre-contacted On the upstream plates, the acid enters the plate, which is a perforated plateau on which valves, caps, louvers, etc., are installed, and after contact with air, is poured through the upper edge of the overflow pipe into the 1-terminal device. At the same time, a stream of water is fed through a manifold and a nozzle into the overflow device, which eliminates the possibility of acid mixing with water outside the overflow volume. For better mixing, the water jet is directed to the fender element made of acid-resistant material, for example, fluoroplastic. The surface of the breakdown element can be conical or flat. Striking this element, the water is thrown against the walls of the overflow device and is encountered with a stream of drying acid. This collision of the flows intensifies the mixing process, as a result of which the acid is diluted and the temperature rises. The heated acid flows out of the annular slots of the overflow device in the form of films, which are crushed by air, and at the same time the process of desorption of sulfur dioxide and the cooling of the acid proceed intensively. Next, the acid enters the downstream plate for subsequent contact with the first air. Heat pipes can be installed in the bubble layer of the downstream tray. The implementation of mixing the acid with water in the overflow device eliminates the effect of a highly aggressive environment on the plate of the plate, while eliminating the possibility of a local temperature increase in the layer and, consequently, intense corrosion of the plate of the plate. The invention The heat and mass transfer apparatus, comprising a housing with plates installed along its height and overflow devices made in the form of nozzles with baffle plates below them, characterized by this,. that, in order to enable the process of air drying and stripping of sulfur dioxide in the production of sulfuric acid under pressure while creating a uniform temperature field on the plateau plate, the device is equipped with a means for entering the reagent in the form of a collector with hills located above the overflow pipes coaxially with it, Fender elements are mounted along the axis along the axis. Sources of information taken into account in the examination 1. Ramm VM. Absorption of gases. M., Himi, 1976, p.349-350.

2. The author's certificate of the USSR G 194764, cl. 01 D 3/22, 1967, (prototype).

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