CN2156395Y

CN2156395Y - Boiler combustion flow-guiding device

Info

Publication number: CN2156395Y
Application number: CN 93217016
Authority: CN
Inventors: 姚文达; 鲍志勇
Original assignee: BEIJING GRADUATE STUDENT DEPT NORTH CHINA ELECTRIC POWER COLLEGE
Current assignee: BEIJING GRADUATE STUDENT DEPT NORTH CHINA ELECTRIC POWER COLLEGE
Priority date: 1993-06-30
Filing date: 1993-06-30
Publication date: 1994-02-16
Anticipated expiration: 2003-06-30

Abstract

The utility model discloses a boiler combustion flow-guiding device which belongs to the technical field of the fabrication and the operation of a boiler. The device is arranged on the upper part of a burning chamber. The flow guiding screen of the device is inclined to the plane of the side wall of a hearth. The utility model can guide fume from the side of the outlet of the burning chamber into the center of the outlet in order to reduce the heat deviation of a superheater and a reheater and the overheating phenomenon of a pipe wall. The utility model has good flow guiding performance.

Description

Boiler combustion flow-guiding device

The utility model belongs to boiler manufacturing and running technology field.

At present, the boiler that evaporation capacity is bigger, on the top of combustion chamber or outlet pendant superheater mostly is housed, its effect is to absorb that radiation of burner hearth conducts heat and the convection heat transfer' heat-transfer by convection of flue gas, is used for heating steam.Burner arrangement is done tangential firing at four jiaos of the combustion chamber along structure shown in Figure 1, and upper air still has rotation in the combustion chamber, and fume centralized goes out at an effluent of outlet, thereby makes superheater, reheater tube wall overheating problem serious.

The purpose of this utility model is to overcome the deficiency of above-mentioned known technology, thus provide a kind of simple in structure, be heated evenly, the boiler combustion guiding device of good guide performance.

The purpose of this utility model realizes with following mode:

This device is connected and composed successively by combustion chamber (3), pendant superheater (6), superheater (7) and reheater (8), wherein, in pendant superheater (6) smoke inlet one side, have flow guiding screen (5), flow guiding screen (5) is made up of the cooling tube panel, the plane of this screen and burner hearth sidewall tilts, and the angle of inclination is at 10～75 °.

The flow guiding screen and the hearth biside wall plane of pendant superheater (6) tilt, and angle is 10～75 °.Also can make flue gas by side guiding central authorities.

The utility model compared with prior art has following advantage:

Flow guiding screen is in tilted layout, with the side wall shape of burner hearth at an angle, flue gas enters flow guiding screen from a side, is directed to the middle part of outlet, thereby has eliminated combustor exit flow of flue gas deviation, reduces superheater and reheater thermal deviation and overtemperature of tube wall phenomenon.Be heated evenly, lead good fluidity.

Below in conjunction with accompanying drawing the utility model is described in detail:

Fig. 1 is the sectional view of existing boiler furnace

Fig. 2 is flow guiding screen layout drawing of the present utility model (first embodiment)

Fig. 3 is second kind of embodiment of the utility model

Fig. 4 is the third embodiment of the utility model

Fig. 5 is a kind of overall structure figure of the utility model

In Fig. 5: (1) steelframe; (2) down-comer; (3) combustion chamber; (4) drum; (5) flow guiding screen; (6) pendant superheater; (7) superheater; (8) reheater; (9) reheater; (10) economizer; (11) air preheater; (12) economizer; (13) air preheater.

Air-flow arrives top, combustion chamber and enters flow guiding screen from a side, arrives the central authorities of outlet behind water conservancy diversion, enters superheater and reheater (Fig. 2 is the A-A cutaway view of Fig. 5), discharges through economizer and air preheater again.

Steelframe (1) is made up of post and beam, is used for supporting, and flow guiding screen (5) and pendant superheater (6) are all hung on the crossbeam of top.Preferably adopt the structure of Fig. 2 or Fig. 4 for new boiler, existing boiler is undergone technological transformation preferably adopt the arrangement of Fig. 2.

Claims

1, a kind of boiler combustion guiding device, connect and compose successively by combustion chamber (3), pendant superheater (6), superheater (7) and reheater (8), it is characterized in that in pendant superheater (6) smoke inlet one side, having flow guiding screen (5), flow guiding screen (5) is made up of the cooling tube panel, the plane of flow guiding screen and burner hearth sidewall tilts, and the angle of inclination is 10-75 °.

2, boiler combustion guiding device according to claim 1 is characterized in that the flow guiding screen of pendant superheater (6) and hearth biside wall plane tilt, and angle is 10-75 °.