SU1368567A1 - Furnace for burning wood waste - Google Patents

Abstract

The invention. used in the furnaces of boilers operating on waste high humidity with a high content of fine fractions. The purpose of the invention is to increase efficiency by intensifying combustion. For this, under 11, combustion chamber 1 (CC) is made inclined and smoothly mated with a curvilinear outer surface 15 of the protrusion 13 of the lower part of the vortex chamber 2 afterburning (CD)

Description

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and I air nozzles 12 are placed along the pfd 11 in front of the partition 3 between the CS and; KD. The partition 3 is made in the form of p) and arranged by steps of horizons. | 1lng pipes 4 with a flat vertical H (|) th surface facing the CS, which eliminates the failure of fuel B.1 in CD 2 and ensures uninterrupted movement of fuel under the force of the body of tin, without hanging in the COP,

1368567.

The supply of secondary air by jets through nozzles 12 contributes to the formation on each jet of a flare ejected from the recirculation zone by a flow of combustion products rotating in KD 2 due to the kinematic energy of tertiary air jets. Intensive mixing in a vortex flow e facilitates efficient afterburning. call. 1 hp f-ly, 1 ill.

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The invention relates to the field of shaving fuel and can be used in boiler furnaces operating on wood waste of high humidity with a high content of fine fractions. .

The purpose of the invention is to increase eco-consistency by intensifying combustion.

, i The drawing depicts a firebox, pr, b- The longitudinal section.

 The furnace for burning wood debris contains a shaft chamber 1 of co-jiaHHH and a vortex cylindrical afterburner chamber 2 with a horizontal prodral axis. Chambers 1 and 2 are divided by jieHbi partition 3, made in an id of a row of horizontal pipes 4 installed to form channels 5 Pipes 4 have a vertical surface of the | iocTb 6 facing the combustion chamber 1 and are arranged in steps of the Eddy swirl chamber 2. Chamber 1 The burn is equipped with inclined ear Yik lattices 7 with slots 8, window 9 for gas discharge, inlet 10 and inclined bottom 11. Air nozzles 12 are placed along the bottom of the hearth 11. The surface of the vortex chamber 2 is tangentially connected to the upper edge of the partition 3 and with abzhena the bottom of the projection 13, the inner 14 and outer surface 15 which smoothly conjugate, respectively, with the vortex chamber 2 and the hearth surface 11 of the combustion chamber 1. The vortex chamber 2 has an exit window 16 and air nozzles 17. The vortex chamber 2 and under 11 combustion chambers 1 are

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uncooled chilled. Nozzles 12 and 17 are installed across the entire width of the chamber 2.

The furnace works as follows.

Wood wastes of humid moisture through the inlet 10 fill the combustion chamber 1 and lie between the grate 7 and the partition 3. The free surface of the toplin layer is located at an angle of repose and lies above the upper edge of the partition 3, abutted against the wall of the chamber 1. The horizontal pipes 4 are facing a vertical surface 6 towards the chamber 1 and with a ledge toward the camera 2 afterburning in such a way that the line connecting the lower edge. - each of the pipes 4 with the upper edge of the underlying pipe 4 makes an angle of at least 45 from the vertical, which eliminates the failure of the fuel in the afterburning chamber 2 and ensures uninterrupted movement under the action of the force t - 5 of a tin of fuel without lags in the combustion chamber 1. Pre-heated primary air through the slit 8 in the grates 7 enters the combustion of fuel. Drying of the fuel is carried out by part of the flue gases, which, passing through the fuel layer, through the window 9, are discharged into the gas ducts of the boiler.

In chamber 1 there is a layer burning of fuel, and there are four characteristic zones in height: the fresh fuel zone — at the outlet of the inlet 10, the drying and fuel preparation zone — in the upper part of the partition 3, the active combustion zone, and the slag burning zone — in the lower part

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bulkheads 3. In the combustion chamber 1, the wood fuel is partially burned out through channels 5 of the partition 3 of the thermolysis products and high-temperature combustion products. The products of thermolysis enter the recirculation zone covering the entire area of the partition 3, fall down into the zone of active combustion and mix with the high-temperature gases. The jetting of secondary air entering the lower part of the recirculation zone through the nozzle 12, located across the width of the vortex chamber 2 afterburning, helps to create optimal concentration and temperature conditions at the air jet boundaries to ignite the thermolysis products.

On each air stream, a flare is formed, which is ejected from the recirculation zone by the flow of combustion products rotating in the vortex chamber 2 due to the kinetic energy of the jets of tertiary air entering through the nozzles 12. Intensive mixing in the vortex flow promotes efficient combustion of gases. Under the action of afterburning of the centrifugal forces of fuel purging in the vortex chamber 2, the partitions 3 carried out through the channels 5 are thrown to the surface of the vortex chamber 2 and rotate in the flow until they burn out. Completely extinguished flue gases from chamber 2 through

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the output window 16 enters the boiler ducts.

Claims (2)

1. A wood burning furnace containing a shaft-separated combustion chamber with a hearth and a vortex cylindrical afterburning chamber with a horizontal longitudinal axis, and air nozzles, the partition wall made of a series of horizontal pipes with a flat vertical surface, installed to form channels, and the surface of the vortex chamber is tangentially connected to the upper edge of the partition and is provided with a protrusion in the lower part, the inner surface of which is curved and smoothly connected with the surface of the vortex chamber, characterized in that, in order to increase efficiency by intensifying the combustion, under the combustion chambers are inclined and smoothly aligned with the outer surface of the protrusion, also curved, and the air nozzles are placed along the underside of the combustion chamber in front of the partition. 2. A firebox according to claim. D, characterized in that the partition walls are ledges in the direction of the vortex chamber, and their flat vertical surface faces in the direction of the combustion chamber. 0 0 five