SU1657866A1 - Fluidized bed furnace - Google Patents

Abstract

Invention m. used in boilers. The goal of the invention is to increase efficiency by reducing underburning and preventing slagging. The furnace contains in the cavity of the housing 1 horizontal heat exchange tubes 3, equipped with fins 5-7, which contributes to the unhindered drain of the captured particles. Part of the pipe 3, placed in the central part, combined in pairs in rows of 8.9. Moreover, the pipes 3 can be made rotatable around their axis, which allows changing the flow area between a pair of pipes 3 in the central part of the furnace, the size of the gap 4 between the pipes 3 and the body 1, and also change the direction of movement of the material from lower to lifting. The size of the flow area between the pair of pipes 3 and the frequency of their location are determined by the mode of operation of the furnace, its load. The design of the firebox allows for deep regulation of the power of the firebox without increasing mechanical underburning. 1 hp f-ly, 1 ill.

Description

n g

Air

The invention relates to heat and energy and can be used in a coog.

OBJECTIVE OF THE INVENTION INCREASING IMPROVEMENT BY REDUCING THE NODHOGOGS

The drawing shows a topkip billet, go

The fluidized bed furnace contains gas distribution grid 2 located in the cavity of Kopriyca 1, groups of trizontal and heat exchange coarse 3, one of the culottes is located in the central part, pipes 3, of the external groups are installed with gaps 4 between themselves and the body one above the other and supplied .y fins 5 and 6, pat laid

ANGLE ON GORIZOIT, l M, YHMl |

1, the pavnik is located at the edge of the measles, on the 1st of the 3rd, placed in the central part, 1 part, i-abzhena with fins of 7 liters, they are in vertical rows of h Y, in each of which the fins 7 are located with

 the clone to the horizon, and the lower n apnics 7 1 are directed oppositely to the formation of V obtzny channels 10. The pipes 3 are made of porosity around their axis.

In the superlayer of space 1 i, convective surfaces of surface 1 are located. Heating is carried out. The furnace 3 is divided into sections 13.

: 14.

The furnace works as follows.

Particles are ejected from the fluidized bed into the superlayer 11. mn (inert fill sloch. coal. The largest. Gilu jh -.- m Elness of them, and this is the result of the free convective convection 12, WJ3- I grow in parts. Part of the type is bubbled through and b. gas towards the walls of the furnace, falls on the gap A between the pipes 3 and the housing 1, then rolls to the bottom of the furnace, small particles diffusing or throwing vortices on the walls of the housing 1 are also unhindered to the afterburning to the bottom of the layer. -: n1 is rough 3. installed in the central1 part of the firebox, pairs of E p. 8 and 9 s are formed The V-shaped canal 10 GURISHE T captures particles, sectioning occurs, the furnaces to a number of furnaces of smaller sizes, which allows for independent air supply to each section 13 and 14, which has its own gas distribution grid 2, - but deep power control is thin by turning on or off sections 13 and 14, as well as the possibility of selecting particles in each section 13 and 14, with the aim of

more efficient fuel burnup and reduction of mechanical underburning with ash.

The position of the fins 5 and 6 with the slope also prevents penetration into

the gap 4 of the flow of gases; Making the pipes 3 rotatable around its axis ensures the directional circulation of the material of the layer under variable operating conditions. In addition, a change in the circulation of the material makes it possible to clean the walls of the furnace and the fins of 5-7 pipes in the superlayer space 11 from particles adhering to them by short-term rotation of the pipes near the wall by 180 °. This changes the direction of circulation.

Claims (1)

Claim 1, a fluidized bed furnace containing a gas distribution grid located in the body cavity, groups of horizontal heat exchange tubes, one of which is located in the central part, and coarse of the other groups are installed one above the other with gaps between themselves and the body at an angle to the horizon, the lower plains of each pipe being located closer to the body, characterized in that, in order to increase efficiency by reducing underburning and prevent slagging, the pipes located in the central part and are equipped with fins and installed in pairs of vertical rows, each of which the fins are inclined to the horizon, with the lower fins directed opposite with the formation of V-shaped channels. 2 The furnace according to claim 1, of which the pipe is turning around its axis.