CN211372393U

CN211372393U - Arrangement structure for adjusting circulating material quantity

Info

Publication number: CN211372393U
Application number: CN201921958162.0U
Authority: CN
Inventors: 吴俊超; 毛军华; 景磊; 张星; 钱钢
Original assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Current assignee: Wuxi Huaguang Environment and Energy Group Co Ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-08-28
Anticipated expiration: 2029-11-14

Abstract

The utility model belongs to the technical field of circulating fluidized bed boiler, specifically be an adjust arrangement structure of circulation material volume, it can make the returning charge lime-ash in time get rid of, guarantees furnace's normal combustion, and it includes furnace, the furnace rear side has been seted up the return mouth, return mouth department is provided with the returning charge leg, the furnace bottom is provided with the air distribution plate, be provided with the slagging pipe on the air distribution plate, the cold sediment machine of slagging union coupling, its characterized in that, the return mouth with the perpendicular distance of air distribution plate is less than 1.5m, the return mouth with the returning charge leg corresponds respectively and sets up two, the slagging pipe is arranged threely at least, wherein two the slagging pipe is just right the returning charge mouth is arranged.

Description

Arrangement structure for adjusting circulating material quantity

Technical Field

The utility model belongs to the technical field of circulating fluidized bed boiler, specifically be an arrangement structure and control method of adjusting circulation material volume.

Background

With the increasingly strict national requirements on pollutant emission and the gradually increasing demand of power station boilers on clean energy technology, the circulating fluidized bed combustion technology is receiving more and more attention as an advanced low-grade fuel clean and efficient combustion utilization technology, and is rapidly developed in recent years.

The material returning system and the slag discharge pipe are important components of the circulating fluidized bed boiler and belong to a part of boiler combustion equipment, and the material returning device is mainly used for conveying circulating materials separated by the steam-cooling separator back to a hearth through a material returning leg to form complete material circulation; the main effect of slagging pipe is in time discharged the large granule in the furnace with the form of end sediment, guarantees the homogeneity of fluidization, and traditional slagging pipe arrangement form is seen in figure 1, and the discharge gate position of returning charge device has 2 meters at least for the grid plate position moreover, and it shows in figure 2, the lime-ash that the returning charge device came out can not in time be followed the slagging pipe and discharged, and a large amount of low temperature returning charge ashes can return to furnace, make the bed temperature reduce, influence the burning in the furnace.

Disclosure of Invention

In order to solve the problem that current returning charge lime-ash can't in time get rid of, influence furnace burning, the utility model provides an adjust circulating material volume's arrangement structure, it can make the returning charge lime-ash in time get rid of, guarantees furnace's normal burning, simultaneously the utility model also provides a control method who adjusts circulating material volume.

The technical scheme is as follows: the utility model provides an adjust arrangement structure of circulation material volume, its includes furnace, the furnace rear side is opened and is equipped with the return mouth, return mouth department is provided with the return leg, the furnace bottom is provided with the grid plate, be provided with the blowing pipe on the grid plate, the cold sediment machine of blowing union coupling, a serial communication port, the return mouth with the vertical distance of grid plate is less than 1.5m, the return mouth with the return leg corresponds respectively and sets up two, the blowing pipe is arranged threely at least, wherein two the blowing pipe is just right the return mouth is arranged.

A control method for adjusting the quantity of circulating materials is characterized in that when a boiler operates under a low-load working condition, the rotating speed of a slag cooler connected with a slag discharge pipe facing a return port is increased, the rotating speed of the slag cooler connected with other slag discharge pipes is reduced, the quantity of discharged circulating materials is increased, the quantity of discharged hearth bottom slag is reduced, and the bed temperature is increased; when the boiler operates under a high-load working condition, the rotating speed of the slag cooler connected with the slag discharge pipe facing the return port is reduced, the rotating speed of the slag cooler connected with other slag discharge pipes is increased, the discharged circulating material quantity is reduced, and the discharged hearth bottom slag quantity is increased.

Adopt the utility model discloses afterwards, reduce the elevation of stove return leg and air distributor, two are just to the slagging-off pipe of return material mouth for the returning charge lime-ash is discharged from slagging-off pipe more easily, and the cold sediment machine rotational speed that simultaneously can the different slagging-off union coupling of reasonable control adjusts circulation material volume, better assurance furnace's normal combustion.

Drawings

FIG. 1 is a schematic view of the arrangement structure of a conventional slag tapping pipe;

FIG. 2 is a schematic view of a conventional material return leg arrangement;

FIG. 3 is a schematic view of the arrangement structure of the slag discharge pipe of the present invention;

fig. 4 is the schematic view of the arrangement structure of the material returning legs of the present invention.

Detailed Description

See fig. 3, as shown in fig. 4, an arrangement structure for adjusting circulating material amount includes a furnace 1, a return port 2 is opened at the rear side of the furnace 1, a return leg 3 is arranged at the position of the return port 2, an air distribution plate 4 is arranged at the bottom of the furnace 1, a slag discharge pipe 5 is arranged on the air distribution plate 4, the slag discharge pipe 5 is connected with a slag cooler, the vertical distance between the return port 2 and the air distribution plate 4 is smaller than 1.5m, the return port 2 and the return leg 3 are respectively correspondingly arranged in two, the slag discharge pipe 5 is arranged in three, and the two slag discharge pipes 5 are arranged right opposite to the return port.

The utility model discloses utilize the water-cooling to put the sediment pipe and will return the direct discharge furnace of material ash to cold sediment machine, the bed temperature is lower under the solution low-load operating mode, and the difficult problem of control of burning can effectively guarantee the operation of boiler safety and stability. The arrangement form has simple structure and wide application range, and can be expanded and applied to similar furnace types.

Claims

1. The utility model provides an adjust arrangement structure of circulation material volume, its includes furnace, the furnace rear side is opened and is equipped with the return mouth, return mouth department is provided with the return leg, the furnace bottom is provided with the grid plate, be provided with the blowing pipe on the grid plate, the cold sediment machine of blowing union coupling, a serial communication port, the return mouth with the vertical distance of grid plate is less than 1.5m, the return mouth with the return leg corresponds respectively and sets up two, the blowing pipe is arranged threely at least, wherein two the blowing pipe is just right the return mouth is arranged.