CN210485694U

CN210485694U - Ash discharge pipe of material returning device of circulating fluidized bed boiler

Info

Publication number: CN210485694U
Application number: CN201921041395.4U
Authority: CN
Inventors: 韩非; 刘天阳; 张胜博
Original assignee: Liaoning Metallurgy Design Research Institute Co ltd
Current assignee: Liaoning Metallurgy Design Research Institute Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-05-08
Anticipated expiration: 2029-07-05

Abstract

The utility model relates to a circulating fluidized bed boiler returning charge ware puts ash pipe, and it is equipped with spiral radiating fin to put ash pipe outside, and it has the trachea to put the outside cover of ash pipe, and trachea upper portion is equipped with the gas outlet, and the trachea lower part is equipped with the air inlet, is equipped with the manometer on the trachea, and air inlet, gas outlet department are equipped with the thermometer respectively. The utility model discloses a cold air is cooled down to putting ash pipe outside, and spiral radiating fin has increased heat radiating area, and the trachea is end opening admits air, the last mouthful is given vent to anger, and spiral radiating fin can reduce gaseous flow velocity in the trachea again simultaneously, makes cold air can fully cool down to putting ash pipe, avoids the dust temperature too high to cause dangerous accident.

Description

Ash discharge pipe of material returning device of circulating fluidized bed boiler

Technical Field

The utility model relates to an environment-friendly device technical field, concretely relates to circulating fluidized bed boiler returning charge ware puts ash pipe.

Background

After ash and fuel particles brought out from the flue gas of the circulating fluidized bed boiler are separated by the separator, the flue gas is circulated back to the combustion chamber through the material returning device, wherein the unburned fuel is recycled, and the combustion efficiency of the boiler is ensured. When the boiler operates, the ash discharging pipe of the material returning device needs to discharge ash discontinuously so as to adjust the operation of the boiler. The ash discharged from the ash discharge pipe of the return feeder has high temperature, and the direct discharge endangers the safety of operating personnel, peripheral equipment of the ash discharge pipe and cables.

Disclosure of Invention

An object of the utility model is to solve above-mentioned problem, provide circulating fluidized bed boiler returning charge ware puts the ash pipe, and it cools down to circulating fluidized bed boiler external row's ash, avoids the too high danger that causes of dust temperature.

In order to solve the above problem, the utility model discloses a technical scheme as follows:

the ash discharge pipe of the material returning device of the circulating fluidized bed boiler is characterized in that spiral radiating fins are arranged outside the ash discharge pipe, an air pipe is sleeved outside the ash discharge pipe, an air outlet is formed in the upper portion of the air pipe, an air inlet is formed in the lower portion of the air pipe, and a pressure gauge and a thermometer are arranged at the air inlet and the air outlet respectively.

The optimization is that the lower part of the air pipe is provided with an ash sweeping opening which is provided with a flange plate and a flange cover.

The optimization is that the middle part of the air pipe is provided with a telescopic compensator.

The telescopic compensator comprises an inner sleeve and an outer corrugated pipe, the inner sleeve comprises an inner pipe and an outer pipe, the lower portion of the inner pipe extends into the upper portion of the outer pipe, a sealing ring is arranged between the inner pipe and the outer pipe, the outer corrugated pipe is arranged outside the inner sleeve, the upper end of the outer corrugated pipe is fixed on the inner pipe through an upper end plate, and the lower end of the outer corrugated pipe is fixed on the outer pipe through a lower end plate.

Compared with the prior art, the utility model discloses favourable effect does:

(1) the utility model discloses a cold air is cooled down to putting ash pipe outside, and spiral radiating fin has increased heat radiating area, and the trachea is end opening admits air, the last mouthful is given vent to anger, and spiral radiating fin can reduce gaseous flow velocity in the trachea again simultaneously, makes cold air can fully cool down to putting ash pipe, avoids the dust temperature too high to cause dangerous accident.

(2) The dust sweeping opening is used for cleaning the interior of the air pipe regularly.

(3) The telescopic compensator is used for compensating expansion with heat and contraction with cold of the air pipe and reducing damage of the air pipe.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings while paying inventive attention.

FIG. 1 is a front view of an ash discharge pipe of a material returning device of a circulating fluidized bed boiler according to the present invention;

FIG. 2 is a side view of an ash discharge pipe of a material returning device of the circulating fluidized bed boiler according to the present invention;

fig. 3 is a schematic structural view of the telescopic compensator of the present invention;

description of reference numerals: the device comprises an ash discharge pipe-1, spiral radiating fins-11, an air pipe-2, an air outlet-21, an air inlet-22, a pressure gauge-23, an ash sweeping port-24, a thermometer-25, a telescopic compensator-3, an inner sleeve-31, an inner tube-311, an outer tube-312, an outer corrugated tube-32, an upper end plate-321, a lower end plate-322 and a sealing ring-33.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.

Referring to the attached

drawings

1 and 2 in the specification, the ash discharge pipe of the material returning device of the circulating fluidized bed boiler of the present invention is provided with a spiral heat radiation fin 11 outside the ash discharge pipe 1, an air pipe 2 is sleeved outside the ash discharge pipe 1, an air outlet 21 is arranged on the upper part of the air pipe 2, an air inlet 22 is arranged on the lower part of the air pipe 2, the air inlet is connected with a fan and a refrigerator, the refrigerator is used for cooling gas, and the air is conveyed into the air pipe after the fan cools the gas. Air inlet 22, gas outlet 21 punishment are equipped with manometer 23, thermometer 25 respectively, and the manometer is used for monitoring trachea inside gas pressure, avoids too big or the undersize of inside pressure, and the thermometer is used for monitoring import, export gas temperature, avoids taking place unusual can not in time discover.

The optimization is that the lower part of the air pipe is provided with the dust sweeping opening 24, the dust sweeping opening 24 is provided with a flange plate and a flange cover, and the flange cover and the flange plate are sealed by a rubber gasket to avoid air leakage of the air pipe.

The optimization is that, the trachea middle part is equipped with flexible compensator 3, and the trachea is different at different temperature degree of stretching out and drawing back, and flexible compensator has compensated the flexible damage of avoiding the trachea expansion under to the different temperature differences.

Referring to the attached drawing 3 in the specification, the telescopic compensator is optimized to include an inner sleeve 31 and an outer corrugated pipe 32, the inner sleeve 31 includes an inner pipe 311 and an outer pipe 312, the lower portion of the inner pipe 311 extends into the upper portion of the outer pipe 312, a sealing ring 33 is arranged between the inner pipe 311 and the outer pipe 312, the outer corrugated pipe 32 is arranged outside the inner sleeve 31, the upper end of the outer corrugated pipe 32 is fixed on the inner pipe 311 through an upper end plate 321, the lower end of the outer corrugated pipe 32 is fixed on the outer pipe 312 through a lower end plate 322, the telescopic compensator of the structure is large in structural strength under the support of the inner sleeve and the outer corrugated pipe, the inner sleeve and the outer corrugated pipe both have telescopic effects, the inner sleeve is synchronously telescopic along with the outer corrugated pipe, deformation caused by the telescopic effect of the inner sleeve and the outer corrugated pipe cannot occur, and the sealing ring plays a supporting and reinforcing effect of the inner.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred embodiments of the present invention, and the present invention is not limited by the above preferred embodiments, and various changes and modifications can be made without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the present invention as claimed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The ash discharge pipe of the material returning device of the circulating fluidized bed boiler is characterized in that spiral radiating fins are arranged outside the ash discharge pipe, an air pipe is sleeved outside the ash discharge pipe, an air outlet is formed in the upper portion of the air pipe, an air inlet is formed in the lower portion of the air pipe, and a pressure gauge and a thermometer are arranged at the air inlet and the air outlet respectively.

2. The ash discharge pipe of the material return device of the circulating fluidized bed boiler according to claim 1, wherein the lower portion of the gas pipe is provided with an ash removal port, and the ash removal port is provided with a flange and a flange cover.

3. The ash discharge pipe of the circulating fluidized bed boiler return feeder of claim 1, wherein a telescopic compensator is provided in the middle of the gas pipe.

4. The ash discharge pipe of the circulating fluidized bed boiler returning charge device according to claim 3, wherein the telescopic compensator comprises an inner sleeve and an outer corrugated pipe, the inner sleeve comprises an inner pipe and an outer pipe, the lower part of the inner pipe extends into the upper part of the outer pipe, a sealing ring is arranged between the inner pipe and the outer pipe, the outer corrugated pipe is arranged outside the inner sleeve, the upper end of the outer corrugated pipe is fixed on the inner pipe through an upper end plate, and the lower end of the outer corrugated pipe is fixed on the outer pipe through a lower end plate.