SU1483168A1 - Device for burning fuel - Google Patents

Abstract

Invention m. B. used to burn solid fuels in a fluidized bed. The purpose of the invention is to increase the efficiency of combustion by better burning of the entrainment of its capture. The fluidized bed 2 combustion chamber is separated by a vertical partition 11 with upper and lower bypass openings 13 and 15 respectively. from the separation chamber 4. The bottom 14 of the chamber 4 is inclined towards the chamber 2, and in its upper part there are nozzles 16 of secondary air. The output channel 19 is connected to the cooling chamber 5 with air nozzles 21, is made in the lower part of the side wall 18 of the chamber 4 adjacent to the partition 11 and has a bottom inclined in its direction. Chamber 5 contains a nozzle and receiver 6 ash residues. Camera 5 m. B. made cylindrical, and the receiver 6 - in the form of a fluidized bed reactor, the outlet opening k = ryo is connected to the nozzles 16 and / or 21.3 Cp. f = ly, 3 ill.

Description

one

The invention relates to the field of energy and can be used in devices that burn solid fuel in a fluidized bed.

A device for burning fuel is known, comprising a fluidized bed combustion chamber separated by a vertical partition with upper and lower bypass openings from a separation chamber having an inclined bottom and provided with secondary air nozzles and an outlet channel connected to the cooling chamber with air nozzles, as well as the nozzle and the receiver of zonal residues connected to the combustion chamber (it is. USSR patent No. 18858, class F 23 C 11/02, 1928).

However, in this device it is impossible to control the temperature of the combustion products for the use of the latter as a drying agent and their degree of purity.

The aim of the invention is to increase the efficiency of combustion by better burning of the ash and its capture.

In a device for burning fuel, containing a fluidized bed combustion chamber, separated by a vertical partition with upper and lower nepenvcK holes from the separation chamber, which has an inclined bottom and is equipped with secondary air nozzles and an outlet channel connected to each other.

00 00

-i

Cfr 00

As far as cooling with air nozzles and the nozzle and ash receiver is concerned, the goal is achieved by the fact that the secondary air nozzles are located in the upper part of the separation chamber, the bottom of which is inclined towards the combustion chamber, and the outlet channel is made in the lower part adjacent to the partition side wall of the separation chamber and has a bottom inclined towards the latter. In addition, the cooling chamber can be cylindrical, the nozzle can be installed in the cooling chamber, and the ash receiver can be made in the form of a fluidized bed reactor, the outlet of which is connected to the secondary air nozzles and / or air nozzles.

Fig. 1 schematically shows a fuel combustion unit, vertical section; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2.

The fuel combustion device comprises a fluidized bed combustion chamber 2 separated by a vertical partition 11 with upper and lower bypass openings 13, 15 from the separation chamber 4 having an inclined bottom 14 and equipped with secondary air nozzles 16 and an outlet channel 19 connected to the cooling chamber 5 with air nozzles 21 and a nozzle 22, as well as a receiver 6 zonal residues, made in the form of a fluidized bed reactor, the outlet 30 of which can be connected to the secondary air nozzles 16 and / or air nozzles 21. The secondary air nozzles 16 are located in the upper part of the separation chamber 4, the bottom 14 of the latter is inclined to the side, the combustion chamber 2, and the output channel 19 is made in the lower part adjacent to the partition 11 of the side wall 18 of the separation chamber 4 and has a bottom 36 inclined towards the latter.

In addition, the device is equipped with a worm conveyor 34 for supplying solid fuel, air supply fans 10, 29, respectively, to the combustion chamber 2 and the receiver 6 ash residues through the grids 7, 26, bypass pipe 24 with adjusting the FDR with valve 25 for ash residues0

five

cove Above the fluidized bed of chamber 2 is a sedative zone 3 of rectangular cross section. A drain hole 35 for ash is made in the receiver of 6 zonal residues.

The fuel combustion device operates as follows.

Solid fuel, along with a sulfur absorber additive, is supplied to coil pipe 34 into the fluidized bed combustion chamber 2 and burned during substochiometric supply of air from the fan 10. The products of incomplete combustion rise up, partially losing speed in zone 3, while some unburned particles fall into the fluidized bed. With the passage of the upper bypass port 13, the flow of the combustion products turns 180 ° and secondary air is introduced from the top through the nozzles 16 into the chamber 4 from the top. Above the bottom 14, the flow of products of complete combustion turns at an acute angle in front of the outlet channel 19. At the same time, most of the entrainment falls to the inclined bottom 14 and returns to the combustion chamber 2 via the lower bypass 15. 0 Ash is transported through line 24 to receiver 6, where it is cooled in a fluidized bed by direct contact with the air supplied by fan 29, after which the cooled ash is removed through drain hole 35.

The products of combustion enter the cooling chamber 5, where, if necessary, air is added to them through the air nozzles 21, at the same time reaching the required temperature for drying.

When the combustion chamber 2 is turned off or when it is kindled, the main stream of combustion products is generated by the nozzle 22 when fuel oil is burned and cooled with cold air coming out of the nozzles 21, which is supplied through the disconnected receiver 6 ash residues.

five

0

five

Claims (1)

1. A device for burning fuel containing a combustion chamber with a fluidized bed, separated by a vertical partition with upper and lower bypass openings from the separation chamber, having an inclined bottom and fitted with nozzles of secondary air 29 26 Fi.1.1 Aa 21 BUT 2 FIG. 3