CN210462985U

CN210462985U - Circulating fluidized bed air distribution device for thermal power plant

Info

Publication number: CN210462985U
Application number: CN201921114074.2U
Authority: CN
Inventors: 郝如平
Original assignee: Inner Mongolia Jinghai Coal Gangue Power Generation Co Ltd
Current assignee: Inner Mongolia Jinghai Coal Gangue Power Generation Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-05-05
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses a circulating fluidized bed air distribution device for thermal power plant, it includes heat preservation pouring material and the wearing layer pouring material that sets up from bottom to top level, the vertical through is provided with the tuber pipe in heat preservation pouring material and wearing layer pouring material, be provided with conical air cap directly over the tuber pipe, the top of air cap is the toper, be provided with a plurality of first gas pocket of a plurality of in the outer periphery equipartition of bottom of air cap, the axis slope of first gas pocket is downward, be provided with a plurality of layers of vortex gas pocket layers from bottom to top equipartition on the outer periphery of air cap; the utility model discloses simple structure through designing first gas pocket and swirl gas pocket, makes the suspension of burning granule rise and form the swirl air current around the hood, on guaranteeing that burning granule evenly distributed burns abundant basis, has reduced between the adjacent hood and has erodeed to reduce wearing and tearing, improve the life of hood, avoid frequently overhauing, improve production efficiency.

Description

Circulating fluidized bed air distribution device for thermal power plant

The technical field is as follows:

the utility model relates to a power plant technical field especially relates to a circulating fluidized bed wind distribution device for thermal power plant.

Background art:

the circulating fluidized bed boiler adopts a clean coal combustion technology with the highest industrialization degree, adopts fluidized combustion, and has the working principle that: the air distribution plate is positioned at the bottom of a hearth and separates an air chamber from the hearth, primary air uniformly enters the hearth after passing through the air distribution plate and uniformly fluidizes combustion particles, the air cap is arranged on the air passage, air enters the hearth from the air chamber through small holes in the air cap at a high flow rate, and the air distribution performance is determined by the structure of the air; however, in the using process, high-speed airflow is sprayed out between the adjacent air hoods, the adjacent air hoods are washed away by burning particles for a long time, serious abrasion is caused, the service lives of the air hoods are short, the air hoods are generally installed in a welding mode, the installation and the disassembly are difficult, and the working efficiency is greatly influenced.

An object of the utility model is to provide a circulating fluidized bed wind distribution device for thermal power plant.

The utility model has the following contents:

the utility model provides a circulating fluidized bed cloth wind device for thermal power plant, its includes by lower heat preservation pouring material 1 and the wearing layer pouring material 2 that supreme level set up, the upper surface detachable of wearing layer pouring material 1 is provided with hood 3 heat preservation pouring material 1 with the vertical tuber pipe 4 that is provided with that runs through in the wearing layer pouring material 2, tuber pipe 4 with the cavity of hood 3 is linked together, be provided with conical air cap 5 directly over the tuber pipe 4, air cap 5 through four vertical connecting rods 6 that set up with the top fixed connection of tuber pipe 4, the top of hood 4 is the toper the bottom outer periphery equipartition of hood 4 is provided with a plurality of first pore 7, the axis slope of first pore 7 is downwards by the supreme equipartition of lower on the outer periphery of hood 4 is provided with a plurality of layers vortex pore layer, the vortex air hole layer is positioned right above the first air hole 7, the air cap 5 is positioned between the first air hole 7 and the vortex air hole layer, a plurality of vortex air holes 8 are uniformly distributed on each vortex air hole layer along the circumferential direction of the air cap 3, and the axis of each vortex air hole 8 does not intersect with the axis of the air cap 3.

Furthermore, connecting wedge blocks 9 are horizontally and fixedly arranged on two sides of the bottom of the blast cap 3, wedge grooves 10 are correspondingly arranged on the upper surface of the wear-resistant layer casting material 2 relative to the connecting wedge blocks 9, the connecting wedge blocks 9 are wedged in the wedge grooves 10, and the rotating direction of the vortex air holes 8 is consistent with the wedging direction of the connecting wedge blocks 9.

The utility model has the advantages that: the utility model has simple structure, through designing the first air hole and the vortex air hole, the combustion particles are suspended and rise and form vortex air flow around the wind cap, on the basis of ensuring the combustion particles to be evenly distributed and fully combusted, the scouring between the adjacent wind caps is reduced, thereby reducing the abrasion, prolonging the service life of the wind cap, avoiding frequent maintenance and improving the production efficiency; the wind cap is more convenient to mount and dismount by using the mounting mode of the wedge groove.

Description of the drawings:

FIG. 1 is a perspective view of the overall structure of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

in the figure, a heat-insulating layer castable 1, a wear-resistant layer castable 2, an air cap 3, an air pipe 4, an air cap 5, a connecting rod 6, a first air hole 7, a vortex air hole 8, a connecting wedge block 9 and a wedge groove 10.

The specific implementation mode is as follows:

as shown in fig. 1 to 4, a circulating fluidized bed air distribution device for a thermal power plant comprises a heat preservation layer castable 1 and a wear layer castable 2, which are arranged from bottom to top, wherein an air cap 3 is detachably arranged on the upper surface of the wear layer castable 1, an air pipe 4 is vertically arranged in the heat preservation layer castable 1 and the wear layer castable 2 in a penetrating manner, the air pipe 4 is communicated with a cavity of the air cap 3, and the circulating fluidized bed air distribution device is characterized in that: be provided with conical air cap 5 directly over tuber pipe 4, air cap 5 through four vertical connecting rods 6 that set up with the top fixed connection of tuber pipe 4, the top of tuber cap 4 is the toper the outer periphery equipartition in bottom of tuber cap 4 is provided with the first gas pocket 7 of a plurality of, the axis slope of first gas pocket 7 is downward be provided with a plurality of layers of vortex gas pocket layer by supreme equipartition down on the outer periphery of tuber cap 4, vortex gas pocket layer is located directly over first gas pocket 7, air cap 5 is located first gas pocket 7 with between the vortex gas pocket layer, every layer vortex gas pocket layer is followed the circumferencial direction equipartition of tuber cap 3 is provided with a plurality of vortex gas pocket 8, every the axis of vortex gas pocket 8 with the axis non-intersect of tuber cap 3.

The working principle is as follows: air enters the blast cap 3 from the air pipe 4 through the air cap 5, the first air holes 7 are inclined downwards to blow up combustion particles at the bottom of the hearth to enable the combustion particles to be suspended, the vortex air holes 8 enable the combustion particles which are suspended and ascend to form a vortex around the blast cap, the combustion particles are prevented from directly impacting the blast cap, the ascending combustion particles descend at a certain height and fall down to the periphery of the blast cap 3 to continue to form the vortex, combustion uniformity is guaranteed, meanwhile, scouring of fuel to the blast cap is effectively reduced, and therefore the service life of the blast cap is prolonged; when the blast cap is installed, the connecting wedge block 9 is only required to be inserted into the wedge groove 10, the rotating direction of the vortex air hole 8 is consistent with the wedging direction of the connecting wedge block 9, the connecting wedge block 9 and the wedge groove 10 are matched more and more tightly, and when the blast cap 3 is damaged, the blast cap 3 is only required to be knocked in the opposite direction for dismounting.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a circulating fluidized bed cloth wind device for thermal power plant, its includes heat preservation pouring material (1) and wearing layer pouring material (2) that set up by lower supreme level, the upper surface detachable of wearing layer pouring material (2) is provided with hood (3) heat preservation pouring material (1) with vertical running through in wearing layer pouring material (2) is provided with tuber pipe (4), tuber pipe (4) with the cavity of hood (3) is linked together, its characterized in that: a conical air cap (5) is arranged right above the air pipe (4), the air cap (5) is fixedly connected with the top end of the air pipe (4) through four vertically arranged connecting rods (6), the top end of the air cap (3) is conical, a plurality of first air holes (7) are uniformly distributed on the outer circumferential surface of the bottom of the blast cap (3), the axes of the first air holes (7) are inclined downwards, a plurality of layers of vortex pore layers are uniformly distributed on the outer circumferential surface of the blast cap (3) from bottom to top, the vortex air hole layer is located right above the first air holes (7), the air cap (5) is located between the first air holes (7) and the vortex air hole layer, a plurality of vortex air holes (8) are uniformly distributed in each vortex air hole layer along the circumferential direction of the air cap (3), and the axis of each vortex air hole (8) is not intersected with the axis of the air cap (3).

2. The circulating fluidized bed air distribution device for a thermal power plant according to claim 1, characterized in that: the connecting wedge blocks (9) are horizontally and fixedly arranged on two sides of the bottom of the blast cap (3), wedge grooves (10) are correspondingly arranged on the upper surface of the wear-resistant layer casting material (2) relative to the connecting wedge blocks (9), the connecting wedge blocks (9) are wedged in the wedge grooves (10), and the rotating direction of the vortex air holes (8) is consistent with the wedging direction of the connecting wedge blocks (9).