CN201262395Y

CN201262395Y - Bell jar type hood used for circulating fluidized bed boiler

Info

Publication number: CN201262395Y
Application number: CNU200820109900XU
Authority: CN
Inventors: 王明义; 尹立辉; 赵庆安; 王志军
Original assignee: YANTAI WANTEDA PRECISION CASTING CO Ltd
Current assignee: YANTAI WANTEDA PRECISION CASTING CO Ltd
Priority date: 2008-08-25
Filing date: 2008-08-25
Publication date: 2009-06-24
Anticipated expiration: 2018-08-25

Abstract

The utility model relates to a bell-typed hood used for a circulating fluidized bed boiler. A conical cover body of the hood is provided with a bottom plane and a lower part side which is externally extended from the plane, the conical surface of the conical cover body has an axial included angle of 30-60 degrees, and the lower part side is vertical to the conical surface of the conical cover body. An inlet pipe is opened on the bottom plane along a central axis. Four air distribution pipe axes are parallel to the conical surface of the conical cover body, and opened on the lower part side, and other ends of the axes are respectively communicated with the inlet pipe. Arc-shaped grooves with the maximum vertical height of 45-55mm are evenly distributed among the outer walls of air distribution pipes. The bell-typed hood used for the circulating fluidized bed boiler has the advantages that: when the blast pressure of air supply fluctuates, materials are not easy to be resorbed into an air chamber, air distribution pores are not easy to be blocked, and inadequate ventilation and overheat damage of the hood caused by slag deposition in the air chamber can not occur. As the arc-shaped grooves are arranged, hood abrasion caused by opposite purging and jet deflection occurring between the hoods is avoided, the air distribution of the hood is uniform and the service life is long.

Description

The bell-jar blast cap that is used for CFBB

Technical field

The utility model relates to boiler component, particularly a kind of bell-jar blast cap that is used for CFBB.

Background technology

Blast cap is the indispensable parts of CFBB, and its function is that the needed air of coal dust firing is entered burner hearth as far as possible equably.Owing to it is distributed in burner hearth bottom, coal upwards can be blown afloat through high pressure to be the boiling shape, thereby make burning more abundant.Common blast cap of circulating fluidized bed boiler mostly is mushroom porous blast cap, 7 fonts and T type blast cap at present, and these products have following deficiency:

1. material can enter air compartment by blast cap hole resorption when blowing blast wandering, and wind distributing hole easily stops up, and causes the air compartment accumulated slag, and the blast cap deficiency in draught is crossed cause thermal damage;

2. cause the blast cap wearing and tearing to blowing between the blast cap with jet deflection.

The utility model content

The purpose of this utility model is to overcome above-mentioned defective, provide a kind of cloth wind evenly, do not stop up, the bell-jar blast cap that is used for CFBB of long service life.

The bell-jar blast cap that is used for CFBB that the utility model provides, comprise body, blast pipe and wind-distributing pipe, described body is a taper cover body, and described taper cover body comprises that base plane reaches the lower side by its extension, and the conical surface of described lower side and described taper cover body is perpendicular; Described blast pipe is positioned on the central axis of described body, and an end opening of described blast pipe is on described base plane; Described wind-distributing pipe is provided with 4 at least along described base plane circumference, one end opening of described wind-distributing pipe is on described lower side, the axis of described wind-distributing pipe is parallel with the conical surface of described taper cover body, and the other end of each described wind-distributing pipe communicates respectively with the other end of described blast pipe; Described taper cover body is evenly equipped with 4 arc grooves between the outer wall of each described wind-distributing pipe.

The utility model is used for the bell-jar blast cap of CFBB, and wherein said wind-distributing pipe and described arc groove are respectively 4.

The utility model is used for the bell-jar blast cap of CFBB, and the conical surface of wherein said taper cover body has 30 °～60 ° axial angle.

The utility model is used for the bell-jar blast cap of CFBB, and the maximum of wherein said arc groove highly is 45～55mm vertically.

The characteristics that the utility model is used for the bell-jar blast cap of CFBB are: because wind-distributing pipe has 30 ° axial angle, one end communicates with blast pipe, the other end is opened on the lower side, so 4 wind-distributing pipes are when the air-supply blast wandering, material is difficult for resorption and enters air compartment, wind distributing hole also be difficult for to stop up, and does not produce the air compartment accumulated slag and causes the blast cap deficiency in draught, crosses cause thermal damage.Simultaneously, the taper cover body is uniform 4 arc grooves between each wind-distributing pipe, and maximum highly is 45～55mm vertically, thus can not cause blast cap to wear and tear to blowing because of generation between the blast cap with jet deflection, and cloth wind is even, long service life.

Description of drawings

Fig. 1 is used for the upward view of the bell-jar blast cap of CFBB for the utility model;

Fig. 2 is the main pseudosection of Fig. 1;

Fig. 3 is used for the vertical view of the bell-jar blast cap of CFBB for the utility model;

Fig. 4 is the profile of the further groove direction of Fig. 3.

Specific embodiments

The utility model is used for the bell-jar blast cap of CFBB, state according to burner hearth wind-force counterweight principle and the operation of homemade CFBB high-temp combustion, summed up the pluses and minuses of mushroom porous blast cap, 7 fonts and T type blast cap, proposed a kind of cloth wind evenly, do not stop up, bell-jar blast cap that the life-span is long.

Referring to figs. 1 through Fig. 3, the utility model is used for the bell-jar blast cap of CFBB, comprises body 1, blast pipe 4 and wind-distributing pipe 2.Body 1 is a taper cover body, and the taper cover body has the lower side 12 that base plane 11 reaches by its extension.The conical surface of taper cover body has 30 ° axial angle α, and lower side 12 is perpendicular with the conical surface of taper cover body.

Be used for the embodiment of the bell-jar blast cap of CFBB at the utility model, blast pipe 4 is positioned on the central axis of body 1, and an end opening of blast pipe 4 is on base plane 11.Wind-distributing pipe 2 is provided with 4 along base plane 11 circumference, and wind-distributing pipe 2 is opened on the lower side 12, and the axis of wind-distributing pipe 2 is parallel with the conical surface of taper cover body, and the other end of each wind-distributing pipe 2 communicates respectively with the other end of blast pipe 4.

With reference to Fig. 4, be used for the embodiment of the bell-jar blast cap of CFBB at the utility model, the taper cover body is evenly equipped with 4 arc grooves 3 between the outer wall of each wind-distributing pipe 2, and the maximum vertically height H of arc groove 3 is 45mm.

Be used for other the embodiment of bell-jar blast cap of CFBB at the utility model, the conical surface of taper cover body can have the axial angle α up to 60 °, and the maximum vertically height H of arc groove 3 can be deepened to 55mm.

The bell-jar blast cap that the utility model is used for CFBB in use, because 4 wind-distributing pipes 2 have 30 ° to 60 ° axial angle α, one end communicates with blast pipe 4, the other end is opened on the lower side 12, so cloth wind is even, wind-distributing pipe is when the air-supply blast wandering, material is difficult for resorption and enters air compartment, wind distributing hole also be difficult for to stop up, and does not produce the air compartment accumulated slag and causes the blast cap deficiency in draught, crosses cause thermal damage.Simultaneously, the taper cover body is uniform 4 arc grooves between each wind-distributing pipe 2, and maximum vertically height H is 45～55mm, so can not prolong service life because of taking place to cause the blast cap wearing and tearing to blowing with jet deflection between the blast cap.

Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; relate under the prerequisite of spirit not breaking away from the utility model; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection domain of claims of the present utility model.

Claims

1, the bell-jar blast cap that is used for CFBB, comprise body (1), blast pipe (4) and wind-distributing pipe (2), it is characterized in that described body (1) is a taper cover body, described taper cover body comprises that base plane (11) reaches the lower side (12) by its extension, and described lower side (12) is perpendicular with the conical surface of described taper cover body; Described blast pipe (4) is positioned on the central axis of described body (1), and described blast pipe (4) one end openings are on described base plane (11); Described wind-distributing pipe (2) is provided with 4 at least along described base plane (11) circumference, described wind-distributing pipe one end opening is on described lower side (12), the axis of described wind-distributing pipe (2) is parallel with the conical surface of described taper cover body, and the other end of each described wind-distributing pipe (2) communicates respectively with the other end of described blast pipe (4); Described taper cover body is evenly equipped with arc groove (3) between the outer wall of each described wind-distributing pipe (2).

2, the bell-jar blast cap that is used for CFBB according to claim 1 is characterized in that described wind-distributing pipe (2) and described arc groove (3) are respectively 4.

3, the bell-jar blast cap that is used for CFBB according to claim 1 and 2 is characterized in that the conical surface of described taper cover body has 30 °～60 ° axial angle (α).

4, the bell-jar blast cap that is used for CFBB according to claim 1 is characterized in that the maximum vertically height (H) of described arc groove (3) is 45～55mm.