SU994864A1 - Burner - Google Patents

Description

(54) BURNER

one

The invention relates to energy and can be used in boilers of thermal power plants.

A known burner comprising a housing with a central tube, forming straight coaxial channels for supplying fuel and a sprayer 1.I

A disadvantage of the known burner is the separation of fuel droplets into walls, slagging and abrasive wear of the burner walls.

A burner is also known, comprising a housing connected to the source of the sprayer with an outlet nozzle and a fuel pipe longitudinally mounted to form an annular channel, provided with a nozzle coaxially placed in its cavity. filing sprayer 2.

The disadvantage of such a burner is also low reliability.

The aim of the invention is to improve the reliability of the burner.

This goal is achieved by the fact that in a burner containing a housing connected to the sprayer source with an outlet nozzle and a fuel pipe longitudinally installed to form an annular channel, equipped with a sprayer nozzle coaxially placed in its cavity, is located in the inlet portion of the fuel tube installed in the housing with displacement relative to its axis by an amount

5 0.025-0.2 of the inner diameter of this pipe, the flow area of which is 3-8 flow areas of the annular channel. In addition, the body outlet nozzle is designed as a diffus, Q fusor with an opening angle of 20-45 ° and a length of 0.75-25 of the internal diameter of the fuel tube.

FIG. 1 shows a burner, a longitudinal section; in fig. 2 - section AA on

15 of FIG. one.

The burner contains a housing 1 connected to the atomizer source with an outlet nozzle 2 and a fuel2Q pipe 4 longitudinally installed to form an annular channel 3, fitted coaxially with a nozzle 5 in its cavity to feed the atomizer and installed in the housing I offset from its axis by an amount the internal diameter of the pipe 4. The flow area of the pipe 4 is 3 to 8 of the flow area of the annular channel 3. The output nozzle 2 of the housing 1 is in the form of a diffuser with an opening angle of 20 to 45 ° and another 0.75-25 internal diameter of the fuel pipe 4. The atomizer feed line to the annular channel 3 and the nozzle 5 is equipped with valves 6-8 that regulate the atomizer flow rate. The burner operates by feeding fuel into the fuel pipe 4 and a spraying agent into the housing 1 through the annular channel 3. As the spraying agent, atmospheric pressure of 3-6 atm is used or atmospheric steam under pressure of 8-40 atm. Fugate is used as fuel the residual mass of the hydro angle, which is a mixture of the smallest particles of coal, water, and particles of rock that get into the hydro angle during mining. The nozzle 5 is used as a purge. during the operation of the burner, the nozzle 5 is blocked by the valve 8, and the spraying agent enters only through channel 3. At the exit of the burner, due to the significant ejection force of the atomizer, the hot flue gases are displaced to the fuel and heated to the temperature required for ignition dust. In the case of using compressed air as a spraying agent at a pressure of 3-6 atm, dust burns due to interaction with this air, if steam is used, then combustion occurs due to interaction with the air remaining from the combustion of the main fuel, which represents a high-calorie dry mass of coal extracted from .. flac / yd / i

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Claims (2)

Fg / g / hydro angle in separation devices, since the burner operates during co-combustion in the volume of the combustion chamber of the cake and fugate. Fugate burners are auxiliary, designed to burn coal dust, which is located in the wet and contaminated rock residue of the coal angle. Claim 1. Burner comprising a housing connected to a sprayer source with an outlet nozzle and a fuel pipe longitudinally mounted to form an annular channel, equipped with a sprayer nozzle coaxially placed in its cavity, characterized in that, in order to increase reliability, the feed nozzle the sprayer is located in the inlet section of the fuel pipe installed in the housing with an offset from its axis by an amount of 0.025-0.2 of the internal diameter of this pipe, the flow area to Torah 3- 8 is flow section area of the annular channel. 2. Burner according to Claim 1, characterized in that the outlet nozzle of the housing is designed as a diffuser with an opening angle of 20-45 ° and a length of 0.75-25 of the internal diameter of the fuel pipe. Sources of information taken into account in the examination 1. USSR author's certificate number 787789, cl. F 23 D 11/04, 1978. 2. USSR Author's Certificate No. 318785, cl. F 23 D 13/46, 1970. fi / ur J Aa fug. 2,