SU842370A1

SU842370A1 - Apparatus for introducing air and gaseous fuel

Info

Publication number: SU842370A1
Application number: SU792755021A
Authority: SU
Inventors: Анатолий Филиппович Телесницкий; Иван Карпович Шмелев; Михаил Николаевич Фокин; Александр Юлонович Окрешидзе; Павел Викторович Маргвелашвили; Роберт Александрович Барабадзе; Иларион Константинович Бежуашвили; Гурам Варламович Кирия
Original assignee: Всесоюзный Научно-Исследовательскийинститут По Защите Металлов Ot Коррозии; Кутаисский Литопонный Завод
Priority date: 1979-02-28
Filing date: 1979-02-28
Publication date: 1981-06-30

Description

(54) УСТРОЙСТВО ДЛЯ ВВОДА ВОЗДУХА И ГАЗООБРАЗНОГО(54) DEVICE FOR INLET AIR AND GAS

ТОПЛИВАFUEL

1one

Изобретение относитс к технике производства пигментов и может быть использовано в муфельных, трубчатых, вращающихс печах непрерывного действи , используемых дл прокаливани , например, цемента , литопона и т. п.The invention relates to a technique for the production of pigments and can be used in muffle, tubular, rotary continuous kilns used for calcining, for example, cement, lithopone, etc.

Известно устройство ввода газообразного теплоносител (топлива), включающее наклонный цилиндрический корпус, снабженный спиралевидной насадкой, устройствами дл загрузки материала 1.A device for introducing a gaseous coolant (fuel) is known, which includes an inclined cylindrical body equipped with a spiral nozzle and devices for loading material 1.

Известное устройство характеризуетс низкой эффективностью равномерного теплообмена . В существующих услови х устройство дл ввода газообразного топлива, и воздуха не позвол ет производить равномерный нагрев муфел , что приводит к резкому перепаду температуры, причем в месте загрузки продукции создаетс температура 1300-1400°С, а в загрузочной части она не поднимаетс выще 200°С. Такое распределение температуры по длине не соответствует требовани м технологического процесса обжига литопона, и не только снижает производительность муфельной печи, но и приводит к быстрому разрущению карборундовой футеровки в местах с повышенной температурой (1300-1400°С).The known device is characterized by a low efficiency of uniform heat exchange. Under existing conditions, the device for introducing gaseous fuel and air does not allow uniform heating of the muffle, which leads to a sharp temperature difference, and the temperature of 1300-1400 ° C is created at the loading point of the product, and in the loading section it does not rise higher than 200 ° WITH. Such a temperature distribution along the length does not meet the requirements of the lithopone burning process, and not only reduces the productivity of the muffle furnace, but also leads to the rapid destruction of the carborundum lining in places with elevated temperature (1300-1400 ° C).

Наиболее близким к предлагаемому вл етс устройство, состо щее из корпуса, выполненного в виде короба, смесительной камеры и форсунок, разгрузочного устройства 2.Closest to the present invention is a device consisting of a body made in the form of a box, a mixing chamber and nozzles, a discharge device 2.

Недостатком известного устройства вл етс то, что оно не позвол ет йовысить производительность и срок службы муфел печи.A disadvantage of the known device is that it does not allow you to improve the performance and service life of the furnace muffle.

Цель изобретени - повыщение производительности и снижение расхода тоЬлива .The purpose of the invention is to increase productivity and reduce fuel consumption.

Claims

This goal is achieved by the fact that in a device for injecting air and gaseous fuel containing a carriage, a housing with a mixing chamber made in the form of a cochlea, and a nozzle, the mixing chamber is provided with a chamotte partition with channels arranged in symmetrical groups with spiral twisting, and one and the group of channels is made from the periphery of the septum to the middle, the other from the middle to the periphery, and a third from the center to the periphery. With such an air supply of gaseous fuel from two sides, a mixture is formed in the central part of the carriage, the flow of which passes through spiral channels to the central axis of the muffle furnace. A safety partition with kinalami allows this area of high temperatures from the end of the muffle in the furnace to distribute with uniform heating of the entire muffle furnace. FIG. 1 schematically shows a device for introducing air and gaseous fuel; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. 2. The device for introducing air and gaseous fuel includes a carriage 1, made in the form of a box-shaped body 2, with a mixing chamber-cochlea 3 and nozzles 4 and 5, a discharge device 6. The front part of the carriage 1 in the combustion zone is made of a half-wall partition 7 with hollow channels 8, 9, 10, located in the thickness of the partition by three symmetric groups, the channels along the length are made with spiral twisting, from the periphery along the cross section of the partition 7 to the middle there is a channel 8, from the middle to the periphery there is a channel 9 and the center to the periphery of the channel 10 is located, all the channels exit at the opposite side walls of chamotte. The device works as follows. The fuel-air mixture through the nozzles 5 enters the mixing chamber-cochlea 3, and additional air is supplied through the hollow channels 8, 9, 10 located along the cross section of the partition 7, with the air being supplied through the channels with spiral twisting and intensively mixed in the cochlea-mixing chamber with the main part of the mixture (gaseous fuel-air), thus creating conditions under which the temperature of the entire stream formed in the mixing chamber from the combustible mixture is more evenly distributed in the discharge zone: 6. The essence of the work The main reason is that the main fuel and air are supplied from two sides tangentially to the inner wall of the cochlea with clockwise twist with additional air injected through the partition wall with three concentrated groups in the center, middle and periphery with spiral twisting to the central axis. furnaces, and the flow control is carried out by periodically changing the amount of the mixture (fuel - air) and additional air. In this case, the uniform operation of a muffle furnace or a tube furnace depends on the amount of fuel supplied, the stabilization of the unloaded product for quenching and the amount of flue gases. The temperature of the flue gases is controlled by varying the flow rate of the gaseous fuel. When the gaseous fuel changes, the flow rate of the primary and secondary air changes in accordance to ensure complete combustion. The temperature and transit time from the product muffle is one of the regime parameters determining the quality of the product obtained and is controlled by changing the amount of the semi-finished litapone loaded for calcination. The device provides efficient movement of air and fuel, use of the flue space, uniform temperature distribution along the length of the muffle furnace: All these advantages help to reduce the specific heat consumption for calcining and drying the lithopone, and also reduce dusting and improve the quality of the lithopone, increase the durability of the muffle lining and the performance of the muffle ovens. Apparatus for injecting air and gaseous fuel, comprising a carriage, a housing with a mixing chamber made in the form of a cochlea, and a nozzle, characterized in that, in order to increase productivity and reduce fuel consumption, the mixing chamber is provided with a chamotte partition with symmetrical channels -groups with spiral twisting, with one group of channels made from the periphery of the partition to the middle, the other from the middle to the periphery, and a third from the center to the periphery. Sources of information taken into account in the examination 1. USSR author's certificate No. 478169, cl. F27 7/00, 1971.

2. USSR author's certificate number 563544, cl. F 27 В 7/02, 1975 (prototype).

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