CN2876561Y

CN2876561Y - Energy-saving wind distributor for circulation fluidized bed boiler

Info

Publication number: CN2876561Y
Application number: CN 200620081290
Authority: CN
Inventors: 肖世普
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-24
Filing date: 2006-02-24
Publication date: 2007-03-07
Anticipated expiration: 2016-02-24

Abstract

The utility model relates to a distributor of air of a boiler, in particular to an energy-saving distributor of air for a circulating fluidized bed boiler, which belongs to the technical area of energy saving in a boiler. The utility model mainly comprises a plenum, an inferior combustion chamber, a grid plate with and air hole, and an air cap. Heat insulating layers are equipped on both the inferior surface and the superior surface of the grid plate. The air hole on the grid plate is connected with the plenum by an air conduit. The air cap is equipped on the top of core tube which is fixed at the superior part of the grid plate. The utility model is characterized in that among the following five spots, the intake A of the air conduit, the intake B of the air hole, the outtake C of the air hole, the upper part D in the core tube and the upper part E of the out side of the core tube, one or more corners are arch-shaped. The existence of arch-shaped corners can effectively reduce the air resistance, reduce the power consumption of the air blower, make the combustion complete, save energy and improve the economical benefit.

Description

The energy-conservation air-distribution device of CFBB

One, technical field

The utility model relates to a kind of air-distribution device of boiler, and especially a kind of energy-conservation air-distribution device of CFBB belongs to the boiler energy-saving technical field.

Two, background technology

Air-distribution device in the existing CFBB, the turning of every air-flow all is a right-angle design on the air communication channel, the resistance coefficient that produces when air communication is crossed herein is bigger, make the pressure reduction of air distribution plate increase, thereby the air drag that primary air fan will be overcome increases, the power consumption that this has just increased primary air fan wastes energy, and has reduced economic benefit of enterprises.

Three, summary of the invention

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and the energy-conservation air distribution plate device of the CFBB that a kind of air drag is little, energy consumption is low is provided.

For achieving the above object, the technical solution adopted in the utility model is: a kind of energy-conservation air-distribution device of CFBB, comprise air compartment, lower hearth, be provided with the air distribution plate and the blast cap of wind distributing hole, on air distribution plate, following two sides all is provided with thermal insulation layer, wind distributing hole on the air distribution plate is to be communicated with air compartment by drawing the phoenix pipe, blast cap is installed in the upper end of the core pipe that is fixed in air distribution plate top, its special character is, with the A of import department of induced duct, the B of air inlet place of wind distributing hole, the C of air outlet place of wind distributing hole, have at least a place to be made as fillet in E five places, the outside, upper end of inboard D in the upper end of core pipe and core pipe.

Such scheme is to transform at the original air-distribution device with regard to boiler, and in newly-designed boiler, inner diameter values as if the wind distributing hole on induced duct, the air distribution plate, core pipe three is identical, then has at least two places to be designed to fillet among the outside, the upper end E of inboard D in the upper end of the A of import department of induced duct, core pipe and core pipe.

The good effect that compared with the prior art the utility model has is, owing to turn to the right angle that is constituted with the duct cross-section variation to change fillet in air-flow, reduced air drag, and the power consumption of blower fan be proportional to the size of air drag, therefore reduce the power consumption of blower fan, saved the energy; And because the reducing of air drag, under the constant situation of air distribution plate pressure reduction, the air velocity of blast cap aperture will increase, and the disturbance that this has just strengthened fluid bed bottom fuel particle makes the fluidisation attitude of burning better, and fuel combustion is more even fully; Moreover under the constant situation of air distribution plate pressure reduction,, thereby reduce the quantity of blast cap because the increase of blast cap aperture air velocity can increase the centre-to-centre spacing between the blast cap, and reduce the use cost of blast cap, increase economic benefit.

Four, description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2-Fig. 4 is the partial enlarged drawing of Fig. 1; Wherein Fig. 2 is the bell-jar blast cap, and Fig. 3 is common blast cap.Fig. 4 is the partial structurtes of new design boiler.

Five, the specific embodiment

For understanding the utility model better, it is described in further detail below in conjunction with drawings and Examples.

With reference to Fig. 1-Fig. 4 as seen, the energy-conservation air-distribution device of CFBB described in the utility model mainly is by air compartment 5, lower hearth 6, be provided with that the air distribution plate 3 of wind distributing hole and blast cap 1 constitute, on air distribution plate 3 and below all be provided with thermal insulation layer 2, wind distributing hole on the air distribution plate 3 is to be connected with the air compartment 5 of its below by drawing phoenix pipe 7, the upper fixed of air distribution plate has the core pipe 4 that is connected with wind distributing hole, blast cap 1 just is installed in the upper end of core pipe 4, in the air-distribution device of old boiler, because of its structure is difficult for change, and the gas-solid kinetic parameter needs coupling, can be according to match condition and cap structure with the A of import department of induced duct 7, the B of air inlet place of wind distributing hole, the C of air outlet place of wind distributing hole, have at least a place to change the fillet design in the right angle, E five place, the outside, upper end of inboard D in the upper end of core pipe 4 and core pipe 4, to reduce air drag, cut down the consumption of energy, energy savings, as in Fig. 2 with A, C, D three places change the fillet design into, B, E two places still keep original right angle, among Fig. 3 with A, B, D three places change fillet into, and the C place still keeps original right angle; And in the air-distribution device of newly-designed CFBB, directly wind distributing hole on induced duct, the air distribution plate and core pipe three's internal diameter is got identical value, coupling according to the gas-solid kinetic parameter, blast cap corresponding to different types of structure, at least two places among the outside, the upper end E of inboard D in the upper end of the A of import department of induced duct 7, core pipe 4 and core pipe 4 can be designed to fillet, as shown in Figure 4.

The required air of boiler combustion at first enters air compartment, enter into by air-distribution device again and make fuel combustion in the burner hearth, after adopting above-mentioned design, suffered local resistance reduces in the process of air from the air compartment to the burner hearth, fan pressure head is reduced, thereby reduced the blower fan power consumption, energy savings, remarkable in economical benefits.

Claims

1, a kind of energy-conservation air-distribution device of CFBB, comprise air compartment (5), lower hearth (6), be provided with the air distribution plate (3) and the blast cap (1) of wind distributing hole, on air distribution plate (3), all be provided with thermal insulation layer (2) below, wind distributing hole on the air distribution plate (3) is communicated with air compartment (5) by drawing phoenix pipe (7), blast cap (1) is installed in the upper end of the core pipe (4) that is fixed in air distribution plate top, it is characterized in that: the A of import department of induced duct (7), the B of air inlet place of wind distributing hole, the C of air outlet place of wind distributing hole, have at least a place to be made as fillet in E five places, the outside, upper end of inboard D in the upper end of core pipe (4) and core pipe (4).

2, the energy-conservation air-distribution device of CFBB according to claim 1 is characterized in that: have at least two places to be made as fillet among inboard D in the upper end of the A of import department of induced duct (7), core pipe (4) and the outside, the upper end E.