RU17354U1 - WATER BOILER - Google Patents

Abstract

Heat recovery boiler.

The utility model relates to the field of power engineering, and more specifically, to waste heat boilers behind reflective non-ferrous metallurgy furnaces, and can be used for other metallurgical units.

The technical problem to be solved by the claimed utility model is aimed at increasing the heat output of the waste heat boiler without increasing its overall dimensions.

The recovery boiler is located horizontally and includes a radiation duct with heat-exchange surfaces. In the upper part of the gas duct, a partition is installed to change the direction of the gases downward, and in the lower part, in the direction of movement of the gases, another partition is installed to change the direction of the gases on additional heat transfer surfaces - rows of thermosyphons. The rows of thermosiphons are freely fixed on the upper part of the gas duct and are staggered relative to each other.

ESSAY.

Description

The utility model relates to the field of power engineering, and more specifically to waste heat boilers behind reflective non-ferrous metallurgy furnaces, and can be used for other metallurgical units.

Known boiler (AS No. 966 400 F 22 V 33/00, F 22 V 1/18, F 23 J 3/02. Decl. 4.04.80) containing adjacent gas ducts, under which are installed pyramidal lined hoppers. Each adjacent duct contains enclosing membrane surfaces, tubular heat exchange surfaces installed inside, and longitudinal distributing and collecting manifolds.

The disadvantages of this design are: significant dimensions of the boiler when cooling the exhaust gas to 400 ° C, the absence of surfaces for heating air. Significant slagging of surfaces installed in the radiation duct.

Known coffered duct behind a reflective furnace, located horizontally, containing a radiation duct with enclosing heat exchange surfaces made of caissons, and a drum separator. Heat exchange surfaces are connected to the lower and upper collectors located along the longitudinal axis, which are connected by pipelines to the separator drum (see O.N. Bagrov, B.M. Kleshko, V.V. Mikhalov Energy of the main non-ferrous metallurgy industries. M., Metallurgy 1979 p. 221-222).

The closest in technical essence and the problem to be solved is a waste heat boiler located horizontally containing a radiation duct with enclosing heat-exchange surfaces with upper and lower collectors and a drum separator. No way, a convective duct with

Illlllllllllllllllllllin ,,.,.

MKI (7) F22 V 1/02, F 22 V 31/08. The boiler is a waste heat recovery boiler.

air heater, and each flue contains bunkers and enclosing walls, which are made in the form of a membrane surface (see the description for the floor. model certificate. No. 10836 from 08.16.99).

The disadvantages of the known recovery boiler can be attributed to its small heat output with significant dimensions.

The technical problem to be solved by the claimed utility model is aimed at increasing the heat output of the waste heat boiler without increasing its overall dimensions.

The stated technical problem is achieved by the fact that in the known waste heat boiler, located horizontally, including a radiation duct with heat exchange surfaces, in its upper part there is a partition for changing the direction of the gases down, and in the lower part - in the direction of the gases, another partition is installed for changing directions of gases to additional heat transfer surfaces, which are made in the form of rows of thermosiphons. In addition, the rows of thermosiphons are freely fixed on the upper part of the gas duct and are staggered relative to each other.

The inventive utility model is illustrated by a drawing, where

in FIG. 1 - shows a General view of the waste heat boiler in the context;

FIG. 2 - section along aa.

The recovery boiler includes a radiation duct 1 with heat exchange surfaces and a convective duct 2. In the upper part of the radiation duct 1, a partition 3 is installed to change the downward direction of the gases. In the lower part of the radiation duct 1, a partition 4 is installed for changing the direction of the gases on the additional heat exchange surfaces, which are made in the form of rows of thermosyphons 5. In the convection duct 2, heater sections are installed 6. The rows of thermosyphons 5 are connected to the drum-separator 7. In the lower part under the flues 1.2 installed hopper 8 for collecting dust.

Dusty gases with a temperature of 1200 - 1400 V flow from the reflective furnace (not shown in the drawing) to the upper part of the radiation duct 1, where they meet with the partition 3 and deviate to the lower part of the radiation duct 1.

Further, directed gases meet with another partition 4 in the lower part of the radiation duct 1 and deviate upward, washing in full the additional heat transfer surfaces - rows of thermosyphons 5, freely fixed in the upper part of the duct 1 and staggered relative to each other. After the radiation duct 1, the cooled gases enter the convective duct 2 with a hopper 8 with sections of the air heater 6 installed in it, where they are cooled to a predetermined temperature. Water flows from thermosiphons 5 pass through a drum-separator 7, being separated into water and steam.

The inventive waste heat boiler has developed working documentation. Production and implementation of a waste heat boiler is planned for

Sredneuralskiy smelter in 2001 (Revda, Sverdlovsk region).

Claims (2)

1. A waste heat boiler located horizontally, including a radiation duct with heat exchange surfaces, characterized in that a partition is installed in the upper part of the duct for changing the gas direction down, and another partition is installed in the lower part for changing the direction of the gases to additional heat exchange surfaces, which are made in the form of rows of thermosiphons. 2. The waste heat boiler according to claim 1, characterized in that the rows of thermosiphons are freely fixed on the upper part of the gas duct and are staggered relative to each other.