CN2709806Y

CN2709806Y - Bell nozzle button of recirculating fluidized bed boiler

Info

Publication number: CN2709806Y
Application number: CN 200420039280
Authority: CN
Inventors: 孙正才; 西献月
Original assignee: YANTAI HUALU THERMOELECTRIC ENGINEERING TECHNOLOGY Co Ltd
Current assignee: YANTAI HUALU THERMOELECTRIC ENGINEERING TECHNOLOGY Co Ltd
Priority date: 2004-03-19
Filing date: 2004-03-19
Publication date: 2005-07-13
Anticipated expiration: 2014-03-19

Abstract

The utility model relates to a button of boiler, in particular to a bell nozzle button of recirculating fluidized bed boiler. It principally comprises a button liner and a button coat which is provided with a plurality of air distributing holes. The utility model is characterized in that the peripheral wall of the upper part of the button liner is provided with a plurality of small air distributing inlets, evening the air distributing and enhancing curability of materials; the button holes are of unblocked.

Description

The novel bell-jar blast cap of CFBB

One, technical field

The utility model designs a kind of Wind cap for boiler, especially a kind of bell-jar blast cap that is used on the CFBB.

Two, background technology

Blast cap is the indispensable parts of CFBB, its main effect is that the needed wind of boiler combustion is sent into burner hearth as far as possible equably, makes burning more abundant, but used blast cap in use the material that easily fallen of its wind distributing hole stop up, cause temperature to rise, reduce service life; And material particles falls into air compartment easily, causes a large amount of dust stratifications of air compartment, and influence is normally ventilated, and has reduced the security of equipment operation; The cloth wind uniformity of existing blast cap is not good enough in addition, and it is insufficient to cause burning; This has all seriously had a strong impact on the thermal efficiency of boiler combustion.

Three, the content of utility model

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and provide a kind of wind evenly, do not stop up, the novel bell-jar blast cap of CFBB that the life-span is long.

For achieving the above object, the utility model is achieved in that the novel bell-jar blast cap of a kind of CFBB, comprise that cover reaches the blast cap overcoat that is connected with its socket in the blast cap, the bottom of blast cap overcoat has several big wind distributing holes, its special character is, has several small wind distributing holes on the upper end perisporium that overlaps in blast cap.

In order to make cloth wind effect better, the distance between the big wind distributing hole upper limb that little wind distributing hole lower edge that puts in the above-mentioned blast cap and blast cap put outward is 40～90mm.

Compared with the prior art the utility model has optimized air-supply passage, makes cloth wind more even, and the fluidizing performance of material is splendid, and blast cap cloth air port is not stopped up, and has prevented that effectively material from falling into air compartment; The resistance of this blast cap is moderate, can reduce the pressure head consumption of a pressure fan effectively, has significantly energy-saving and cost-reducing effect, has improved the thermal efficiency of boiler combustion, and long service life.

Four, description of drawings

Fig. 1 is a part sectional structure schematic diagram of the present utility model.

Fig. 2 is the cutaway view of blast cap overcoat.

Five, the specific embodiment

With reference to Fig. 1, Fig. 2 as seen, the novel bell-jar blast cap of CFBB described in the utility model mainly is made up of cover 1 and the blast cap overcoat 2 that is connected with its socket in the blast cap, have several big wind distributing holes 3 in the bottom of blast cap overcoat 2, have several little wind distributing holes 4 on the upper end perisporium of cover 1 in blast cap, the distance between little wind distributing hole 4 lower edges and big wind distributing hole 3 upper limbs is 40～90mm; During installation, the lower end of cover 1 is fixedly welded on the air distribution plate 5 in the blast cap, and cast concrete 6 is in order to insulation above air distribution plate 5 gets, and overcoat supports the location by interior cover.

During boiler operatiopn, the lower end that wind in the air compartment overlaps in the blast cap enters, the cover top evenly sprays in several little wind distributing holes that the set upper side is offered in the blast cap and the blast cap then, turn back 180 ° and enter in the inside and outside cover interlayer of blast cap, several big wind distributing hole ejections around at last from blast cap overcoat bottom, enter fluidising chamber, the boiling material makes it abundant burning; This blast cap cloth wind is more even, and serviceability is better, and better effects if is a kind of desirable novel blast cap.

Claims

1, the novel bell-jar blast cap of a kind of CFBB, comprise that cover (1) reaches the blast cap overcoat (2) that is connected with its socket in the blast cap, the bottom of blast cap overcoat (2) has several big wind distributing holes (3), it is characterized in that: have several little wind distributing holes (4) on the upper end perisporium of cover (1) in blast cap.

2, the novel bell-jar blast cap of CFBB according to claim 1 is characterized in that: the distance between little wind distributing hole (4) lower edge and big wind distributing hole (3) upper limb is 40～90mm.