SU682728A1 - Vertical water-tube boiler unit - Google Patents

Description

bolts, also leads to the complexity and inconvenience of installation work during the installation of pipe systems and their repairs.

The suspension of the boiler furnace to the supporting beams at a considerable height (more than 100 m) causes large thermal displacements (0.5-0.6 m) of the lower elements of the boiler, which complicates the design of fuel supply systems, air blowing into the burners, gas pipelines for evacuating gases from boiler in the air heater, nutritional lines, etc.

The aim of the invention is to reduce the metal intensity and size.

This goal is achieved by the fact that the upper headers of the furnace and the lower headers of the convective gas duct are rigidly fixed to the lower headers of the PTZ camera, and the block formed from the bonded headers is mounted on the frame supporting frame with the possibility of horizontal movement, for example, on movable supports.

FIG. 1 shows schematically a boiler unit, a longitudinal section; in fig. 2 - section A-A of FIG. one; in fig. 3 is a section BB of FIG. one; in fig. 4 - section bb of FIG. 3; in fig. 5 — node I of FIG. one.

The vertical water tube boiler comprises a frame, which is a metal structure made up of columns 1 and beams 2 forming the support frame 3. On the frame, formed by screens connected to the upper and lower headers, the furnace 4, the turning chamber 5 with fixture surfaces 6 heating, a convective flue 7 with convective heating surfaces 8 and a warm box 9 formed by the inclined bottom 10 of the rotating chamber 5, the screen of the convective flue 7, the screen 12 of the furnace 4, is sealed oh skin 13, located above the support frame 3 and the side screens of the PTZ camera 5.

The height h on which the support frame 3 is located from the basement, depending on the steam generating capacity of the boiler, is 0.3-0.75 of its total height N. So, for a boiler unit with a steam generating capacity of 2500 t / h, 45-50 m and H 70- 75 m, while for the same steam output of the boiler unit of the suspended structure H 110-115 m.

Through the "warm box 9" intake ducts 14 of flue gases pass through, on screens 15 of which, like on screens 11 and 12, crossbars 16 are mounted. Screen heating surfaces 6 are made with collectors 17, which are supported on crossbars 16. On opposite collectors 17 the ends of the heating surfaces to the pipe pads 18 are supported by the ceiling screen 19 with the help of combs 20 welded to the pipes of the ceiling screen 19 and the combs 21 welded to the pipe platforms 18 of the heating surfaces 6. Combs 20 and 21 are perpendicular to each other with the possibility of relative movement.

The screens of the convective flue 7, the side screens of the PTZ chamber 5 and the screens 15 of the intake ducts 14 are made with bottom headers 22, the screens of the firebox 4

made with additional upper headers 23. Lower headers 22 and additional upper headers 23 are rigidly interconnected in a unit for receiving horizontal forces during Tension deformations.

Bashmaks 24, rigidly connected to the unit and installed by means of cup springs 25 and rolling supports 26 on the support frame 3, serve to support all the enclosing surfaces.

The flue gases from the furnace 4 pass through the rotating chamber 5, where they heat the screen heating surfaces 6 and are partially sucked into the intake boxes 14 of the flue gases, for example, for fuel. From the turning chamber 5, the flue gases follow into the convective flue 7, where they heat the sections of the convective heating surfaces 8 and then through the windows 27 of the ash bunker

28 are fed into an air preheater (not shown in the drawings), and then discharged through a stack.

During the operation of the boiler, the vertical thermal displacement occurs in two

the directions to the support frame 3: the screens located above the support p; olo: 3, are freely extended upwards, and those located under it - downwards. Horizontal thermal motions are provided with rolling bearings 26.

The described construction of a water-tube boiler significantly reduces its height, reduces pipeline communications, and provides for height independence.

of the boiler unit on the dimensions (height) of the beams of the support frame and the overall height of the warm box, reduces the vertical thermal displacement of the boiler unit elements both by reducing its height and

due to multidirectional movements from the fixed support frame - in comparison with the known boilers of the suspended structure.

Claims (2)

Invention Formula Vertical water tube boiler containing a frame with a support frame and screens connected to the upper and lower collectors and a furnace, a rotary chamber and a convective gas duct, sequentially connected in gas, characterized in that, in order to reduce metal consumption and dimensions, the upper furnace headers and lower headers of the duct convector are fixed to the rotary chamber headers, and the unit formed from the bonded headers on the support frame of the frame with the possibility of horizontal movement-5, for example, on movable supports. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 569791, cl. F 22B 37/00, 1973. 2. US patent No. 3001514, CL. 122-510, publ. 1961. 22 22 h n L Bf Rig.z Bb 21 ® V f fpuz.