CN-224229984-U - Layered material distribution combustion system of coal-fired boiler

CN224229984UCN 224229984 UCN224229984 UCN 224229984UCN-224229984-U

Abstract

The utility model discloses a layered distribution combustion system of a coal-fired boiler, and relates to the technical field of auxiliary efficiency improvement of coal-fired. The utility model comprises a combustion chamber, wherein a fire grate is arranged in the combustion chamber, layered feeding mechanisms are respectively arranged on two side walls of the combustion chamber, the discharge end of each layered feeding mechanism is arranged above the feeding side of the fire grate, and the layered feeding mechanisms sequentially output bottom-layer coal, middle-layer coal and upper-layer coal for one time, so that the aim of adding different types of layered combustion above the fire grate of the combustion system is fulfilled.

Inventors

GAO WEI
Tao ze
WANG LEI
LI LINLIN
CAI XINYAN
WANG YAN

Assignees

大唐林州热电有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250528

Claims (4)

1. The layered material distribution combustion system of the coal-fired boiler is characterized by comprising a combustion chamber (1), wherein a fire grate (2) is arranged in the combustion chamber (1), layered feeding mechanisms are respectively arranged on two side walls of the combustion chamber (1), a discharge end of each layered feeding mechanism is arranged above a feeding side of the fire grate (2), and the layered feeding mechanisms sequentially output bottom-layer coal, middle-layer coal and upper-layer coal.
2. The layered distribution combustion system of the coal-fired boiler according to claim 1, wherein the layered feeding mechanism comprises a first discharging pipe (3), a second discharging pipe (4) and a third discharging pipe (5) which are horizontally arranged in sequence from top to bottom, the first discharging pipe (3) is used for outputting bottom-layer coal, the second discharging pipe (4) is used for outputting middle-layer coal, the third discharging pipe (5) is used for outputting upper-layer coal, and the first discharging pipe (3), the second discharging pipe (4) and the third discharging pipe (5) are sequentially discharged.
3. The layered distribution combustion system of the coal-fired boiler according to claim 2, wherein one end of the first discharging pipe (3) extends into the combustion chamber (1) and is arranged above the fire grate (2), and the other end of the first discharging pipe (3) is communicated with a first charging pipe (6) which is vertically upwards; one end of the second discharging pipe (4) extends into the combustion chamber (1) and is arranged above the fire grate (2), and the other end of the second discharging pipe (4) is communicated with a second charging pipe (7) which is vertically upwards; One end of the third discharging pipe (5) extends into the combustion chamber (1) and is arranged above the fire grate (2), and the other end of the third discharging pipe (5) is communicated with a third charging pipe (8) which is vertically upwards; The coal powder feeding device is characterized in that a first pushing mechanism is arranged in the first discharging pipe (3), a second pushing mechanism is arranged in the second discharging pipe (4), a third pushing mechanism is arranged in the third discharging pipe (5), and the first pushing mechanism, the second pushing mechanism and the third pushing mechanism push coal powder out successively.
4. A layered distribution combustion system of a coal-fired boiler according to claim 3, characterized in that the first feeding pipe (6), the second feeding pipe (7) and the third feeding pipe (8) are arranged in a manner of being sequentially far away from the outer wall of the combustion chamber (1), the lengths of the first discharging pipe (3), the second discharging pipe (4) and the third discharging pipe (5) are sequentially increased, and the discharging ends of the first discharging pipe (3), the second discharging pipe (4) and the third discharging pipe (5) are arranged on the same vertical surface; The first pushing mechanism comprises a first pushing plate (9) arranged in the first discharging pipe (3), a first pushing rod (10) extending out of the first discharging pipe (3) is arranged on one side of the first pushing plate (9), and the first pushing rod (10) sequentially penetrates through the second feeding pipe (7) and the third feeding pipe (8); The second pushing mechanism comprises a second pushing plate (11) arranged in the second discharging pipe (4), one side of the second pushing plate (11) is provided with a second pushing rod (12) extending out of the second discharging pipe (4), and the second pushing rod (12) passes through the third feeding pipe (8); the third pushing mechanism comprises a third pushing plate (13) arranged in the third discharging pipe (5), and a third pushing rod (14) extending out of the third discharging pipe (5) is arranged on one side of the third pushing plate (13); The end parts of the first push rod (10), the second push rod (12) and the third push rod (14) are simultaneously connected to a vertical connecting rod (15), the vertical connecting rod (15) is connected with a telescopic mechanism, and a telescopic end (16) of the telescopic mechanism is parallel to the axis of the first push rod (10) and/or the axis of the second push rod (12) and/or the axis of the third push rod (14).

Description

Layered material distribution combustion system of coal-fired boiler Technical Field The utility model relates to the technical field of auxiliary efficiency improvement of coal combustion, in particular to a layered distribution combustion system of a coal-fired boiler. Background The carbon content of the boiler fly ash is one of main operation index and technical index reflecting the efficiency of the coal-fired boiler of the thermal power plant, and directly reflects the combustion effect of the boiler. The high carbon content of the fly ash causes the increase of coal consumption and reduces the heat economy of the boiler, and also can cause the blockage of a flue gas channel, thereby causing secondary combustion of a flue at the tail part of the boiler, affecting the safe operation of the boiler and causing equipment damage and personal injury accidents in serious cases. Therefore, the carbon content of fly ash is reduced, which is not only necessary for controlling the combustion of the pulverized coal airflow of the boiler, but also greatly improves the economy of the boiler unit, thereby reducing the discharge amount of the smoke dust of the boiler and reducing the environmental pollution. Through the arrangement of layered combustion, fly ash in the combustion process can be effectively reduced. However, how to ensure that different coal materials are added according to different layers during charging is a problem to be solved urgently in the process of realizing layered combustion by utilizing a fire grate at present. Disclosure of utility model The utility model aims to provide a layered distribution combustion system of a coal-fired boiler so as to realize the purpose of adding different types of layered combustion above a fire grate of the combustion system. In order to achieve the above purpose, the present utility model adopts the following technical means: The utility model provides a coal-fired boiler layering cloth combustion system, includes the combustion chamber, be provided with the grate in the combustion chamber, the both sides wall of combustion chamber is provided with layering feeding mechanism respectively, layering feeding mechanism's discharge end is located the top of grate material loading side, layering feeding mechanism once outputs bottom layer coal material, middle level coal material and upper coal material successively. Preferably, the layered feeding mechanism comprises a first discharging pipe, a second discharging pipe and a third discharging pipe which are sequentially arranged from top to bottom, wherein the first discharging pipe is used for outputting a bottom coal material, the second discharging pipe is used for outputting a middle coal material, the third discharging pipe is used for outputting an upper coal material, and the first discharging pipe, the second discharging pipe and the third discharging pipe are sequentially discharged. Further, one end of the first discharging pipe extends into the combustion chamber and is arranged above the fire grate, and the other end of the first discharging pipe is communicated with a first feeding pipe which is vertically upwards; One end of the second discharging pipe extends into the combustion chamber and is arranged above the fire grate, and the other end of the second discharging pipe is communicated with a second charging pipe which is vertically upwards; One end of the third discharging pipe extends into the combustion chamber and is arranged above the fire grate, and the other end of the third discharging pipe is communicated with a third feeding pipe which is vertically upwards; The first discharging pipe is internally provided with a first pushing mechanism, the second discharging pipe is internally provided with a second pushing mechanism, the third discharging pipe is internally provided with a third pushing mechanism, and the first pushing mechanism, the second pushing mechanism and the third pushing mechanism push out pulverized coal successively. Furthermore, the first feeding pipe, the second feeding pipe and the third feeding pipe are sequentially arranged far away from the outer wall of the combustion chamber, the lengths of the first discharging pipe, the second discharging pipe and the third discharging pipe are sequentially increased, and the discharging ends of the first discharging pipe, the second discharging pipe and the third discharging pipe are arranged on the same vertical surface; The first pushing mechanism comprises a first pushing plate arranged in the first discharging pipe, a first pushing rod extending out of the first discharging pipe is arranged on one side of the first pushing plate, and the first pushing rod sequentially penetrates through the second feeding pipe and the third feeding pipe to be arranged; The second pushing mechanism comprises a second pushing plate arranged in the second discharging pipe, one side of the second pushing plate is provided with a second pushing ro