CN201121894Y

CN201121894Y - Split type circulating fluidized bed boiler hood

Info

Publication number: CN201121894Y
Application number: CNU200720080694XU
Authority: CN
Inventors: 周宏�
Original assignee: Sichuan Yibin Huimei Line Industry Co Ltd
Current assignee: Sichuan Yibin Huimei Line Industry Co Ltd
Priority date: 2007-08-20
Filing date: 2007-08-20
Publication date: 2008-09-24
Anticipated expiration: 2017-08-20

Abstract

The utility model discloses a split type CFB boiler air-cap, the adopted proposal is that the split type CFB boiler air-cap comprises an air-cap barrel, and an air-cap head positioned at the upper part of the air-cap barrel; ventilation holes are arranged at the air-cap head, the air-cap head is movably connected with the air-cap barrel. The split type CFB boiler air-cap reforms the prior fixed CFB boiler air-cap, causes the integral type to be improved to the split type, is convenient for the maintenance of the air-cap head, prevents the air eyes from being blocked, reduces the formation of the material part 'dead area', increases the return-material temperature, saves the energy resources, and fulfils the purpose of convenient and simple operation.

Description

Split type blast cap of circulating fluidized bed boiler

Technical field

The utility model relates to a kind of Wind cap for boiler, in particular for the blast cap of CFBB.

Background technology

CFBB is a kind of clean coal combustion technology, has a wide range of applications in fields such as station boiler, Industrial Boilers.The operation principle of CFBB is: send into burner hearth after coal is broken into molecule, there are a large amount of material in the stove simultaneously, by the lower furnace portion air distribution, make fuel in the bed material, be fluidized combustion, and, send the solid particle that separates back to device by flying dust and send into the burner hearth burning once more at furnace outlet installation cyclone separator.Its operation characteristic is that fuel repeatedly circulates in stove with the bed material, has time enough to burnout, and the flying dust sulfur content is descended, and efficiency of combustion improves.

Blast cap is the main consumable accessory on the CFBB, several blast caps all are housed on every boiler, so the operate as normal of blast cap is concerning the normal operation of fluidized-bed combustion boiler.

Existing blast cap of circulating fluidized bed boiler is made of blast cap tube and the blast cap head that is positioned at blast cap tube upper end, on the blast cap tube, be distributed with some horizontally disposed eyes of wind, compress wind enters from blast cap tube bottom, outwards sprays from the eye of wind to blow out, for the fuel in the material bed provides burning required oxygen.Because the grain flow at eye of wind place easily causes the eye of wind to stop up, the material part of this blast cap correspondence will form " dead band " after the obstruction.Because space, Wind cap for boiler place is narrow and small, and the blast cap of recirculating fluidized bed is the overall fixed formula, can not take off the blast cap head separately, therefore just can't dredge the operation of the blast cap eye of wind, also just can't overhaul this, in case local form " dead band " of material, it is unimpeded to influence the boiler feed back, reduce the feed back temperature, waste energy.Blast cap can't continue to use because of the eye of wind stops up in addition, just need change, and has also strengthened production cost thus.

Develop a kind of blast cap of easy access, avoiding material to form " dead band " is the difficult problem that current CFBB needs to be resolved hurrily.

Summary of the invention

The utility model provides a kind of split type blast cap of circulating fluidized bed boiler, be intended to existing fixed blast cap of circulating fluidized bed boiler is transformed, make things convenient for the maintenance of blast cap head, prevent that the eye of wind from stopping up, reducing material part " dead band " forms, improve the feed back temperature, energy savings, and reach easy to operate simple purpose.

For achieving the above object, the technical solution adopted in the utility model is as follows:

Split type blast cap of circulating fluidized bed boiler comprises the blast cap tube, is positioned at the blast cap head on blast cap tube top, and the blast cap head is distributed with the eye of wind, it is characterized in that: the blast cap head is connected with the blast cap tube is movable.

Described blast cap head is threaded with the blast cap tube.

The beneficial effects of the utility model show:

One, split-type structural, for convenience detach, maintenance, the mediation eye of wind is simple to operate;

Two, reduce material part " dead band " and form raising feed back temperature, energy savings;

Three, reduce the blast cap renewal cost, save cost;

Four, reduce the accessory time of changing, improve overhaul of the equipments efficient.

Description of drawings

Fig. 1 is the utility model cross-sectional view

Fig. 2 is the partial enlarged drawing of Fig. 1

Fig. 3 is a blast cap tube cross-sectional view

Fig. 4 is a blast cap head cross-sectional view

Reference numeral: 1 is the blast cap tube, and 2 is the blast cap head, and 3 is the eye of wind, and 4 is screw thread

The specific embodiment

The utility model proposes a kind of split type blast cap of circulating fluidized bed boiler, to have the overall fixed formula now and be improved to split typely, and when the eye of wind stops up, only need pull down the blast cap head and get final product, make the blast cap maintenance become possibility, avoided to overhaul the various drawbacks that cause because of the blast cap head.

Split type blast cap of circulating fluidized bed boiler comprises blast cap tube 1, is positioned at the blast cap head 2 on blast cap tube 1 top, is distributed with the eye of wind 3 on the blast cap head 2, and improvement is: blast cap head and blast cap tube are arranged to split-type structural, and are convenient to dismounting, promptly movable connection.

Movable connection as: one, bite type connects: the blast cap headgear and is provided with the latch structure on the blast cap tube; Two, card slot type connects: same blast cap headgear and is provided with the draw-in groove structure on the blast cap tube; Three, be threaded: as the blast cap head internal thread is set, the blast cap tube is provided with external screw thread, and perhaps both exchange set-up mode, all can realize being threaded.

Movable connection also is not limited to above-mentioned three kinds of modes, so long as split-type structural, the structure that the blast cap head can be disassembled is all within protection domain of the present utility model.

What provide as shown in drawings, is the structural representation that is threaded.For guaranteeing that air intake passage is isometrical in the blast cap, corresponding separately the reducing of wall thickness at blast cap head and blast cap tube screw thread 4 places.

Claims

1, split type blast cap of circulating fluidized bed boiler comprises blast cap tube (1), is positioned at the blast cap head (2) on blast cap tube top, and the blast cap head is distributed with the eye of wind (3), it is characterized in that: blast cap head (2) and movable connection of blast cap tube (1).

2, split type blast cap of circulating fluidized bed boiler according to claim 1 is characterized in that: described blast cap head (2) is threaded with blast cap tube (1).