CN1174959A

CN1174959A - Auxiliary air nozzle for combustion furnace

Info

Publication number: CN1174959A
Application number: CN97115470A
Authority: CN
Inventors: 达尼埃尔·比里当
Original assignee: GEC Alsthom Stein Industrie
Current assignee: Alstom Power Boiler SA
Priority date: 1996-07-31
Filing date: 1997-07-29
Publication date: 1998-03-04
Also published as: RU2152563C1; CA2210958A1; EP0822375B1; PT822375E; ZA976701B; EP0822375A1; DK0822375T3; CA2210958C; ES2165005T3; FR2752042A1; FR2752042B1

Abstract

This invention related to a air spout assistant of burning furnace, it consists of a rectangular(6)-section housing with four walls in two facing pairs - a first pair (6A) and a second pair (6B) which can be turned about an axis of rotation (7) passing through the first pair. The two other sides of the housing are open and form its intake and outlet (6C) for the air flow. The housing contains a series of shutters (12A, 12B) which lie perpendicular to its second pair of walls (6B), each shutter capable of rotation about a pivot (13) by an actuator.

Description

Auxiliary air nozzle for combustion furnace

The present invention relates to a kind of auxiliary air nozzle for combustion furnace.

Or rather, the present invention relates to a kind of like this auxiliary air nozzle for combustion furnace, it comprises a case with square-section, case is made of four walls that are called the first wall and second wall facing each other, and rotate around the axis that is called rotation that runs through first wall by a control piece, case is opened on two relative faces, and one is air inlet face, and another is the face of giving vent to anger of air in the combustion furnace.

Usually, vertically the stacked spout of series is installed in the top of the injector case at four angles of combustion furnace, is used for balance combustion furnace temperature inside, and reduces the discharging of nitrogen oxide.

In order to blow auxiliary air and the spout of plurality of vertical orientation to be installed in a vertical zone, this is known.For this reason, spout comprises a rotary box, rotary box rotates around a horizontal axis by a kind of layout of alignment pin, alignment pin is configured on the first vertical wall of case, rotation is controlled by a control piece, control piece is made of a bar, and bar is hingedly fixed on the rotation on the wall in the wall, and carries out push-and-pull so that nozzle directional.

This spout is described in the patent documentation FR-2689211 that proposed on March 30th, 1992 to some extent the applicant.

But, adopt this scavenger system, the non-uniform temperature in the combustion furnace, spout only blows auxiliary air on an invariable horizontal space, and air can not be blown in the described space from the side.

The present invention can carry out the horizontal break-in of output gas flow and not change existing layout of vertically regulating, and therefore can regulate the temperature in the whole combustion furnace.

For this reason, according to the present invention, the structure with some impeller perpendicular to second wall is configured in the case, and each impeller is arranged respectively by a kind of start and rotated around an axis that intersects vertically with rotation.

So obtain combustion furnace, the optimum Working of an efficient traditional heating boiler for example, make boiler have stable output vapor (steam) temperature.In addition, by the adjustment of auxiliary air air blowing angle, can more effectively reduce the discharging of nitrogen oxide.

According to most preferred embodiment, impeller is parallel to each other and interconnect.

The start layout is best to link to each other with an impeller, and constitute by a Y-piece, Y-piece is hinged on the impeller along an axis vertical with impeller, and be installed in rotatably on the member around its longitudinal axis, described member is hinged on the action shaft, and action shaft slides along the longitudinal axis that it is parallel to second wall.

Described case preferably is made of corrugated plating.

Case can be reinforced by some bars on the face of giving vent to anger, and bar links to each other with second wall and is parallel to first wall.

Below with reference to the accompanying drawing that a most preferred embodiment of the present invention only is shown the present invention is described in detail.

Accompanying drawing is as follows:

Fig. 1 is the horizontal cross of a combustion furnace.

Fig. 2 A and 2B are that spout of the present invention is in linear position and the vertical cutaway view of the position that makes progress.

Fig. 3 A and 3B are that spout of the present invention is in the linear position and the horizontal cross of position to the right.

Fig. 4 is a thin portion transverse sectional view.

Fig. 5 is the front view of seeing from combustion furnace one side of spout of the present invention.

Combustion furnace 1 with horizontal rectangular cross section shown in Figure 1 is furnished with injector case 2 at Qi Sijiao, and the injector case is furnished with auxiliary air nozzle 3.The injector case is made of a series of spouts that are stacked on the combustion furnace part height.

If resemble only vertically break-in the prior art, 3 of spouts blow auxiliary air on the invariable space 4 of level.Therefore, exist in the combustion furnace auxiliary air blow less than space 5, temperature can not be regulated in space 5.

According to the present invention, spout 3 also can carry out horizontal break-in and not change the layout of vertical adjusting, therefore can carry out break-in on all directions, can regulate the temperature in the whole combustion furnace.

For this reason, spout 3 preferred design become other shown in the drawings like that.

Spout 3 comprises a case 6 with square-section, case 6 is made of four walls facing each other, and two vertical wall 6A are called first wall, two with respect to the horizontal plane the wall 6B of slight inclination be called second wall, wall is preferably corrugated plating, so that not large deformation under temperature effect.Case 6 is opened on two relative faces, and one is air inlet face 6D, and another is the output face 6C of air in the combustion furnace.

Case 6 is supported by a supporting structure 8, can rotate around a horizontal axis 7 that is called rotation by a control piece, and axis 7 traverses first wall 6A.Control piece is made of a bar 9, and bar 9 is hingedly fixed on the rotation 7 on the vertical wall 6A, carries out push-and-pull so that case 6 is vertically-oriented, and case 6 can rotate by a kind of layout of alignment pin 10, and alignment pin 10 is configured on the vertical wall 6A of case 6.

Case 6 is reinforced by some bars 11 on output face 6C, and bar 11 links to each other with inclined wall 6B, and is parallel to vertical wall 6A.

Structure 12 with some impeller perpendicular to inclined wall 6B is configured in the case 6.Structure 12 is made of parallel pass through

flat profile

12C, 12D

continuous impeller

12A, 12B, and impeller is connected on the flat profile.

Each

impeller

12A, 12B arrange by a kind of start and center on an axis 13 that intersects vertically with rotation 7 respectively, rotate on two rotating hinge fitting 20A, 20B being configured on the case 6 second wall 6B.

This start is arranged and is connected with an impeller, preferably be connected with central impeller 12A, and constitute by a Y-piece 14, Y-piece 14 is hinged on the impeller 12A along an axis vertical with impeller 12A, and be installed on the member 14A around the rotation of its longitudinal axis, member 14A is hinged on the horizontal action shaft 15, and horizontal action shaft slides along its longitudinal axis, and supported by guide ring 18, guide ring is remained on the supporting structure 8 by diagonal brace 19.Or rather, member 14A is a kind of flat profile, has 16, one of slotted holes and runs through in the alignment pin 17 insertion slotted holes of axle 15, as shown in Figure 4.

Therefore,, can regulate the vertically-oriented of auxiliary air air-flow, and pass through the slip of action shaft 15, can regulate the horizontal orientation of auxiliary air air-flow by the push-and-pull campaign of bar 9.These two kinds of adjustings can be carried out simultaneously, like this, can carry out orientation on all directions.In addition, horizontal orientation is arranged and can be placed on the existing vertically-oriented spout.

Claims

1. auxiliary air nozzle for combustion furnace, it comprises a case (6) with square-section, case is made of four walls that are called first wall (6A) and second wall (6B) facing each other, can rotate around an axis that is called rotation (7) by a control piece, described axis traverses first wall (6A), described case is at two relative face (6C, open 6D), one is air inlet face (6D), another is the face of giving vent to anger (6C) of air in the combustion furnace, it is characterized in that, structure (12) with some impeller perpendicular to described second wall (6B) is configured in the described case (6) each impeller (12A, 12B) can arrange that centering on an axis that intersects vertically with described rotation (13) respectively rotates by a kind of start.

2. spout according to claim 1 is characterized in that, described impeller (12A, 12B) is parallel to each other and interconnect.

3. spout according to claim 2, it is characterized in that, described start is arranged and is connected with an impeller (12A), constitute by a Y-piece (14), Y-piece is hinged on the described impeller along an axis vertical with impeller (12A), and be installed on the member (14A) around the rotation of its longitudinal axis, described member is hinged on the action shaft (15), and action shaft slides along the longitudinal axis that it is parallel to second wall (6B).

4. according to one of aforesaid right requirement described spout, it is characterized in that described case (6) is made of corrugated plating.

5. according to one of aforesaid right requirement described spout, it is characterized in that described case (6) is gone up at the face of giving vent to anger (6C) and reinforced by some bars (11), described bar links to each other with second wall (6B), and is parallel to first wall (6A).