SU628376A1

SU628376A1 - Screen heating surface

Info

Publication number: SU628376A1
Application number: SU762432550A
Authority: SU
Inventors: Кальман Миронович Слоущер; Владимир Георгиевич Клюнков; Наум Вульфович Короневский; Хая Наумовна Ротенберг; Анатолий Сергеевич Агеев
Priority date: 1976-12-13
Filing date: 1976-12-13
Publication date: 1978-10-15

Description

1one

Изобретение относитс к области энергетики и может быть использовано в котлоагрегатах.The invention relates to the field of energy and can be used in boilers.

Известна ширмова поверхность нагрева, состо ща из цельносварных панелей, установленных в верхней части топочной камеры парового котла и выполненных в виде плоских трубных лент . Недостатками указанной ширмовой поверхности нагрева вл ютс ее шлакование при работе котла на шлакующих топливах, например сланцах , необходимость специальных устройств дл очистки и низка несуща способность.A screen heating surface is known, consisting of all-welded panels installed in the upper part of the combustion chamber of a steam boiler and made in the form of flat pipe bands. The disadvantages of this screen heating surface are its slagging when the boiler operates on slagging fuels, such as shale, the need for special cleaning devices and low carrying capacity.

Наиболее близким к изобретению техническим решением вл етс ширмова поверхность нагрева, содержаща подключенные к коллекторам теплообменные трубы, образующие П-образную пространственную панель и состо щие из двух частей: пр молинейной - несущей и зигзагообразной - компенсирующей 2j. Недостатком этой ширмовой поверхности нагрева также вл етс её шлакование, привод щее к снижению тепловоспринимающей способности .The closest technical solution to the invention is a screen heating surface containing heat exchange tubes connected to the collectors, forming a U-shaped spatial panel and consisting of two parts: a straight line carrier and a zigzag compensating 2j. The disadvantage of this screen heating surface is also its slagging, leading to a decrease in heat-absorbing ability.

Целью изобретени вл етс умень шение шлаковани поверхности нагрева . Это достигаетс тем, что в предлагаемой поверхности нагрева участки труб, примыкаю1пие к коллекторам, скреплены поперечной стенкой, снабженной патрубком дл подвода рециркул ционных газов, панель выполнена газоплотной , трубы ее лобной и тыльной частей вогнуты, кажда последующа труба по сравнению с предыдущей в направлении от торцов к средней части панели имеет меньшую степень вогнутости, и вертикальные участки крайних торцовых труб плотно скреплены между собой дл образовани газоплотного короба с клиновидными торцами , а лобна часть панели снабжена перфорацией дл вывода рециркул ционнь х газов.The aim of the invention is to reduce the slagging of the heating surface. This is achieved by the fact that, in the proposed heating surface, the pipe sections adjacent to the collectors are fastened with a transverse wall equipped with a nozzle for supplying recirculation gases, the panel is gas-tight, the pipes of its frontal and rear parts are concave, each subsequent pipe is compared to the previous one the ends to the middle part of the panel have a lower degree of concavity, and the vertical sections of the extreme end tubes are tightly fastened together to form a gas-tight box with wedge-shaped ends, and the frontal a portion of the panel is provided with perforations for recirculating gases.

На фиг. 1 изображена описываема ширмова поверхность нагрева, вид сбоку; на фиг. 2 - вид по стрелке А на фиг 1; на фиг. 3 - разрез по Б-Б на фиг. 1; на фиг. 4 - узел 1 на фиг. 3.FIG. 1 shows the described heating surface, side view; in fig. 2 is a view along arrow A in FIG. 1; in fig. 3 is a section along BB in FIG. one; in fig. 4 — node 1 in FIG. 3

Claims

The screen heating surface contains heat exchanger pipes 2 connected to the collectors 1, forming a U-shaped spatial panel. The pipe sections 2 adjacent to the collectors 1 are fastened with a transverse wall 3 equipped with a pipe 4 for supplying recirculation gases. The panel is made of a gas-tight, the tubes of its frontal and rear parts (in Figs. 1 and 3, the frontal and rear parts of the panel are respectively the right and left parts) are concave, and the subsequent pipe is compared with the previous one in the direction from the ends to the middle part the panels have a lower degree of concavity, and the vertical sections of the extreme end pipes are tightly bonded to each other to form a gas-tight duct 5 with wedge-shaped ends, and the frontal part of the panel is provided with perforations to output the recirculation gases. establishes an eva of the furnace and a rotary duct and used as superheaters. It is mounted vertically with collectors 1 in the lower part, supported on the girders of the boiler. Through pipe 4, inside the box 5, recirculation gases are supplied, which exit the box through perforations in the frontal part of the panel to upwind the gas flow, cool it and ash, and thereby reduce slagging. When recirculation gases pass through duct 5, they cool the pipes. Such screen heating surfaces can also be made in the suspended version. The invention provides equal cooling of the flue gases with recirculation gases, reduces the localization of heat loads on the frontal part of the panel and improves the reliability of the heating surface, provides cooling of the entire mass of ash particles to a temperature below the softening point, which prevents slagging of the heating and subsequent heating surfaces and, in general, significantly increases the turnaround time of boilers, especially those using fuels with a large amount of calcium oxide, such as Estonian shales and Kansk-Achinsk coals. Claims: Heating surface, comprising heat exchanger tubes connected to the collectors, forming a Spatial panel, characterized in that, in order to reduce slagging, pipe sections adjacent to the collectors are fastened with a transverse wall fitted with a pipe for supplying recirculation gases, the panel gas-tight, the tubes of its frontal and rear portions are concave, each subsequent tube has a lower degree of concave than the previous one in the direction from the ends to the middle part of the panel spine and outer vertical portions of end braces the Theoretical pipe tightly together to form a gas-tight box Sklinovidnymi ends and Lobna. the panel is provided with perforations for recirculating gases. Sources of information accepted. into account in the examination: 1.Avtorskoe certificate of the USSR 193535, cl. G 28 U 1/00, 1965.

2. Authors certificate of the USSR (265890, class F 22 B 37/10, 1968.