RU1798608C - Ceiling disperser of shot for cleaning boilers - Google Patents

Abstract

The invention relates to boiler equipment. The purpose of the invention, improving reliability and increasing service life, is ensured by the spreader body and the internal pipe placed in it of two parts, the lower ones of which are mounted with the possibility of joint axial movement relative to the upper ones, which are fixedly mounted on the boiler, and out of its wiring. 3 C.p. f-ls, 1 ill.

Description

The invention relates to energy and is intended for cleaning the heating surfaces of power boilers of power plants from ash and slag deposits, in particular for shot cleaning carried out during operation of the boiler.

The purpose of the invention is to increase reliability and increase the service life of the ceiling spreader of the fraction - is achieved by the fact that in the spreader containing a hollow body with an axial nozzle for supplying a working fluid at one end and an outlet at the other, an inner pipe concentrically placed in the housing with the formation of an annular the toroidal reflector was crushed by an acceleration gap. located in the outlet, the casing and the inner pipe are made up of upper and lower parts, the upper parts being fixed to the boiler wall and the lower ones mounted with the possibility of their joint axial. movements relative to the top. In addition, the upper part of the inner pipe is in communication with the nozzle for supplying the working fluid and

made with windows communicating the cavity of the pipe with an annular gap, and the lower part of the inner pipe is provided with a bottom with a reflective cone, a conical insert mounted above it and windows in the wall made in the area of the reflective cone, and the lower part of the body can be connected to a counterweight and the upper part of the housing is provided with a protective casing.

The invention is illustrated in the drawing, which shows a General view of the device.

The ceiling spreader for cleaning power boilers comprises a cylindrical body consisting of an upper part 1 fixedly mounted on the wall 2 of the boiler and a lower part 3, in the outlet 4 of which there is a toroidal reflector 5. Along the axis of the body with the formation of an annular gap 6 is installed an inner tube, also consisting of upper 7 and lower 8 parts, rigidly connected to upper 1 and lower 3 parts of the housing, respectively. Top S / U

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parts of the pipe 7 are made with windows 9 located in the zone of the lower cut of the nozzle of 10 liters of shot supply and communicating the cavity of the pipe with an annular gap b. The lower part of the pipe is equipped with a bottom 11 with a reflecting onus 12 and a conical insert 13 mounted above it with a central hole

1.4. whose diameter is 3-5 diameters of the robes. In the area where the reflecting cone 12 is placed, windows 10 are made in the pipe wall

1.5. Flexible cone bottom 8

16. thrown through blocks 17, connected with a counterweight 18.

On supercharged boilers, the fraction spreader is installed in a protective case 15 19 connected through a pipe 20 to a blower fan (not shown).

The ceiling spreader works as follows, 20

In the initial state, the movable part of the ceiling spreader is at the highest position due to counterweights, i.e. it is completely raised beyond the wall 2 of the boiler, while the windows 9 in 25 of the upper part 7 of the inner pipe are overlapped by the wall of the lower part 8 of the pipe.

When the shot is continuously supplied to clean the boiler heating surfaces, the shot, delayed by the conical insert 13, fills the cavity of the inner pipe, partially wakes up through the central hole 14, and then the windows 15 and the outlet 4. Due to the fact that the shot enters the inner tube goes more intensively 3.5 but than removing it through the central hole 14, the lower part of the pipe 8 is filled with shot, the weight of the lower movable part of the shot spreader increases and it moves downward, providing 40 introduction of the shot spreader into p Working position. In this case, the inner tube is almost completely filled with shot. The fraction forming a natural slope of 40-45 ° through the windows 9 uniformly enters the 45th annular gap b between the body wall and the inner pipe and, dispersing in it, falls on the toroidal surface of the reflector 5, the reflection of which is uniformly scattered over the gas area - 50 strokes and cleans the convective heating surfaces located in it.

After the fraction enters the ceiling spreader through the nozzle 10, the fraction left with in the inner pipe is discharged through the central hole 14 in the conical insert 13. The weight of the lower part

the spreader decreases and under the action of counterweights it moves to the upper initial position, completely going beyond the wiring of the boiler walls.

In boilers operating under pressure, the air supplied to the protective housing 19 from the blower fan prevents the air from leaving the convection shaft.

The use of the invention allows the ceiling spreader of the shot, or rather its lower part, the most susceptible to the action of adverse factors (high temperature and flue gas flow), to move outside the walled. At the same time, the sealing air entering the protective casing from the blower fan, which creates excessive pressure in the shot spreader itself, additionally protects the spreader from high temperatures.

Formula of the invention

Claims (4)

1. Ceiling spreader for cleaning power boilers, comprising a hollow body with an axial nozzle for supplying a working fluid at one end and an outlet at the other, an inner pipe concentrically placed in the housing with the formation of an annular gap between them to disperse the shot, and a toroidal reflector located in the outlet, characterized in that. that, in order to increase reliability and increase the service life, the casing and inner pipe are made up of upper and lower parts, while the upper parts are rigidly fixed to the boiler wall and the lower ones are mounted with the possibility of their joint axial movement relative to the upper ones. 2. The spreader according to claim 1, with the exception that the upper part of the inner pipe is in communication with the nozzle for supplying the working fluid and is made with windows communicating the cavity of the pipe with an annular gap, and the lower part of the inner pipe equipped with a bottom with a reflective cone, a conical insert installed above it and windows in the wall made in the area of the reflective cone. 3. Spreader lo PP. 1 and 2, on the basis of the fact that it is provided with a counterweight connected to the lower part of the housing. 4. Spreader pop. 1, distinguished by the fact that the upper part of the body is equipped with a protective casing.