CN201983257U

CN201983257U - Built-in separator for hearth of circulating fluidized bed

Info

Publication number: CN201983257U
Application number: CN2011200287427U
Authority: CN
Inventors: 林雨; 殷道孝; 李东荣
Original assignee: China Western Power Industrial Co Ltd
Current assignee: China Western Power Industrial Co Ltd
Priority date: 2011-01-28
Filing date: 2011-01-28
Publication date: 2011-09-21
Anticipated expiration: 2021-01-28

Abstract

The utility model discloses a built-in separator for a hearth of a circulating fluidized bed, which belongs to the field of circulating fluidized bed devices, and comprises an ash blocker and a collector connected with the lower end of the ash blocker. When the built-in separator is in use, solid particles in flue gases with high ash concentration downwards fall off into the collector along a wall when meeting the ash blocker of the ash facing surface of a feston tube, and return to the hearth to participate in burning and achieve the purpose of implementing primary solid-gas separation on flue gases with high ash concentration; moreover, cleaner flue gases backwards enter a cyclone separator for secondary separation; therefore, not only is the abrasion of the ash-containing flue gases on a tail part heating surface lightened, but also the carbon content of the fly ashes in the flue gases from a boiler outlet is reduced, so that the efficiency of the boiler is greatly improved; moreover, the solid particles primarily separated can also return to the hearth to participate in secondary burning, so that the utilization rate of fuels is improved and a very important role in the safe, stable and economic running of a whole power plant can be played.

Description

Recirculating fluidized bed burner hearth integral separator

Technical field

The utility model relates to a kind of recirculating fluidized bed auxiliary equipment, particularly a kind of recirculating fluidized bed separator.

Background technology

At present, the high-temperature flue gas that burning in circulating fluid bed boiler produces usually carries a large amount of solid particles, it is high ash concentration flue gas, these high ash concentration flue gases are generally through the outlet smokestack of being made up of the pipe of having loose bowels of wall after the upper furnace, enter cyclone separator and carry out gas solid separation, the clean relatively high-temperature flue gas that comes out from cyclone separator enters heated surface at the end of boiler it is heated, if the separative efficiency of cyclone separator is not high, the flue gas that contains a large amount of solid particles enters back-end surfaces back-end surfaces is carried out transversal flow, will cause serious wearing and tearing to back-end surfaces, influence the safe and stable operation of boiler, a large amount of solid particle collection at large of while gets off to return burner hearth and repeatedly participates in burning, cause the boiler tail unburned carbon in flue dust higher, the utilization rate of fuel reduces, the thermal efficiency of boiler also reduces, to the economic benefit generation adverse influence of entire power plant.

The utility model content

Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of integral separator that can carry out first solid and gas separation to high ash concentration flue gas that addresses the above problem.

The technical solution adopted in the utility model is such: a kind of recirculating fluidized bed burner hearth integral separator comprises ash retention equipment and the gathering-device that links to each other with the ash retention equipment lower end.

As preferably: the tubaeform fin of described ash retention equipment for rearranging by band steel.

As preferably: described gathering-device comprises collecting board and feeder, and described collecting board is positioned at the gathering-device lower end, and feeder is positioned at the collecting board lower end.

As further preferred: described collecting board is obliquely installed.

During mounting arrangements, ash retention equipment can adopt modes such as welding to be fixedly installed in the Guan Yingyan face of having loose bowels of wall after the upper furnace, collecting board is arranged in the pipe bottom of having loose bowels, be obliquely installed, feeder is arranged on the rear water wall, during use, when high ash concentration flue gas is run into the ash retention equipment of the Guan Yingyan face of having loose bowels, solid particle in the flue gas is adherent to falling on the collecting board, fall into feeder along collecting board again, return burner hearth and participate in burning, reach high ash concentration flue gas is carried out the purpose that first solid and gas separates, comparatively clean flue gas enters cyclone separator backward and separates once more.

In sum, owing to adopted technique scheme, the beneficial effects of the utility model are: separate because the utility model has carried out effectively first solid and gas to high ash concentration flue gas, both having alleviated ash-laden gas is the wearing and tearing of the heating surface of process after flue gas comes out from cyclone separator to back-end surfaces, reduced unburned carbon in flue dust in the boiler export flue gas again, boiler efficiency is improved greatly; The first solid particle that separates can also return burner hearth and participate in burning once more, has improved the utilization rate of fuel, and important function has been played in safety and stability, the economical operation of entire power plant.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the A-A cutaway view of Fig. 1.

Mark among the figure: 1 is the pipe of having loose bowels, and 2 is fin, and 3 is collecting board, and 4 is feeder.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Embodiment 1:

As shown in Figure 1, a kind of recirculating fluidized bed burner hearth integral separator comprises the tubaeform fin 2, collecting board 3 and the feeder 4 that are rearranged by band steel, and collecting board 3 is positioned at fin 2 lower ends, feeder 4 is positioned at collecting board 3 lower ends, and the direction of arrow is high concentration flow of flue gas direction among the figure.

During mounting arrangements, as shown in Figure 2, fin 2 adopts welding manners to be fixedly installed in the cigarette face of meeting of the pipe 1 of having loose bowels of wall after the upper furnace, and collecting board 3 is arranged in pipe 1 bottom of having loose bowels, and is obliquely installed, and feeder 4 is arranged on the rear water wall; During use, high ash concentration flue gas run into have loose bowels the pipe 1 meet the fin 2 of cigarette face the time, solid particle in the flue gas is adherent to falling on the collecting board 3, fall into feeder 4 along collecting board 3 again, return burner hearth and participate in burning, reach high ash concentration flue gas is carried out the purpose that first solid and gas separates, comparatively clean flue gas enters cyclone separator backward and separates once more.

Separate because the separator of present embodiment has carried out effectively first solid and gas to high ash concentration flue gas, both alleviated the wearing and tearing of ash-laden gas, reduced unburned carbon in flue dust in the boiler export flue gas again, boiler efficiency is improved greatly back-end surfaces; The first solid particle that separates can also return burner hearth and participate in burning once more, has improved the utilization rate of fuel, and important function has been played in safety and stability, the economical operation of entire power plant.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; such as; ash retention equipment can also adopt other materials or other shapes; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. a recirculating fluidized bed burner hearth integral separator is characterized in that: comprise ash retention equipment and the gathering-device that links to each other with the ash retention equipment lower end.

2. recirculating fluidized bed burner hearth integral separator according to claim 1 is characterized in that: the tubaeform fin of described ash retention equipment for being rearranged by band steel.

3. recirculating fluidized bed burner hearth integral separator according to claim 1, it is characterized in that: described gathering-device comprises collecting board and feeder, and described collecting board is positioned at the gathering-device lower end, and feeder is positioned at the collecting board lower end.

4. recirculating fluidized bed burner hearth integral separator according to claim 3, it is characterized in that: described collecting board is obliquely installed.