SU1386794A1 - Boiler - Google Patents

Abstract

Invention m. used in thermal power plants. The purpose of the invention is to reduce the size of the boiler and losses in the surrounding environment. For this, the boiler is equipped with an additional tubular screen 9 included in the path of the heated medium bypassing the middle 5 and the top 6 sections of the front screen and forming a cavity 11 with it, the so-called heat box. In cavity 11, collectors 8 of surfaces 7 and heating of the flue are installed. The heat box over the curved sections of the front screen is formed by pressing the firebox 1 The heat box heat is perceived by the screen 9. 1 Il. a 1c (/

Description

6. 1

The invention relates to power engineering and can be used at tag power plants.

The aim of the invention is to reduce the dimensions of the boiler and heat losses to the environment due to a thermal box over the curved section of the front screen, which forms the pressure of the furnace, and an extension of the heat box with an additional tubular screen included in the path heated medium

The drawing schematically shows k (ztel, a common

The boiler contains a furnace 1, a lift 2 and a bottom 3 gas duct. The furnace 1 and the gas duct 2 are equipped with a frontal screen made with the lower section 4 located in the zone of the furnace 1, the middle section 5 located above the last H2O, and the upper section 6 located in in the flue zone 2, in the last ngm, the heating surfaces 7 are located; manifolds 8 installed outside the flue 2

The boiler is also provided with a tubing screen 9, included in the path of the heated medium with the help of tees 10 b aypasno middle 5 and upper 6 C front-panel screens. The screen 9 forms, with sections 5 and 6 of the front screen, a cavity 11, the so-called thermal crate, in the cavity M, collectors 8 of the heating surface 7 “are installed. Screen 9 can be supplied with: External thermal insulation 12. Top 1 is equipped with burners 13 and rear tpy64aTbiM screen 14, the upper part of which separates gas ducts 2 and 3 0ДН from another. In gas duct 3, heating surfaces 15 are installed. 11, formed by screen 9 and 5 and 6 of the front screen.

located above the slope

5 last, forming clamped firebox, between the screen 9 and the site

6-front screen mounted spacers 16 "The number of pipes in the screen

9 is selected according to the conditions of perceiving the weight loads from the lower portion 4 of the front screen and the collectors B of the heating surfaces.

The boiler works as follows. When the burners 13 operate, the combustion products pass through the furnace 1 and ducts 2 and 3 where they cool, heat the front screen environment, the rear screen 14 and the heating surfaces 7 and 15, the heat of the heat box is perceived by the screen 9, which reduces the heat loss to the environment, and the location of the heat box above the furnace 1 reduces the height of the boiler

Claims (1)

Invention Formula The boiler contains a firebox and a gas duct with a front tubular screen included in the path of the heated medium and made with lower, middle and upper sections located respectively in the furnace zone, above the furnace and in the duct zone, and in the latter there are heating surfaces with collectors installed outside A gas duct, characterized in that, in order to reduce the dimensions and heat losses to the environment, it is equipped with an additional tubular screen included in the path of the heated medium, bypassing the middle and. the upper parts of the front screen and forming a cavity with them in which the collectors of the flue heating surfaces are installed.