CN201259215Y

CN201259215Y - Anti-wear and reinforced anti-deforming apparatus for liner of circulating fluidized bed boiler

Info

Publication number: CN201259215Y
Application number: CN 200820029251
Authority: CN
Inventors: 蒋敏华; 肖平; 江建忠; 黄中; 马丽锦
Original assignee: Xian Thermal Power Research Institute Co Ltd
Current assignee: Xian Thermal Power Research Institute Co Ltd
Priority date: 2008-05-30
Filing date: 2008-05-30
Publication date: 2009-06-17
Anticipated expiration: 2018-05-30

Abstract

The utility model relates to an anti-wear, reinforcing anti-deformation unit for the internal screen of a circulating fluidized bed boiler, which comprises screen type heating surface tubes; wherein, anti-wear, reinforcing ribs which are perpendicular to or make an angle of 15 degrees or less with a screen type heating surface are added on the outer surfaces of the screen type heating surface tubes or intertube fins; and the anti-wear, reinforcing ribs are welded on the screen type heating surface tubes. The unit can reduce the strength and frequency of the erosion of ash particles on the screen type heating surface tubes and has an anti-wear effect. Meanwhile, the unit can effectively mitigate the deformation of the screen and reduce the projected area and height of the screen while ensuring the required heat absorption, thus helping mitigate the deformation tendency of the screen. The unit has the advantages of easy arrangement and simple construction.

Description

The abrasionproof of screen and reinforcement anti-deformation device in a kind of circulating fluid bed boiler

Technical field

The utility model relates to the CFBB technology, the abrasionproof of screen and reinforcement anti-deformation device in particularly a kind of circulating fluid bed boiler.

Technical background

CFBB is in order to absorb the heat that fuel combustion discharges, except the heating surfaces such as fin panel casing of burner hearth wall, also usually need arrange the curtain wall of certain area in stove, these heating surfaces play evaporation, the overheated and effect of heat more respectively according to the difference of position.These water-cooleds screen, cross heat shielding or again the concrete structure of heat shielding be the tube panel that is welded to form certain width and height by parallel and array of pipes by the fin between pipe.In the specific design of boiler, after these screens can be arranged in stokehold or stove, generally by front and back side wall and furnace roof turnover through walls, furnace roof suspended in midair.Heat shielding is shielded, crossed to common water-cooled, heat shielding is exactly to playing the not address of same-action screen again.

Above-mentioned several screen is used very extensive in CFBB, but also there are some problems, because the special burning organizational form of CFBB, material concentration is very high in the burner hearth, the existence of boundary current can make the stove internal heating surface be easier to occur wearing and tearing in addition, particularly, can the economical operation of power plant be had an immense impact in case the booster blowing out accident of wearing and tearing initiation occurs owing to shield the particularity and the residing position of screen of flow working medium in the stove.Simultaneously, adopt layout through walls to shield because CFBB is general at present, too high screen height and abominable running environment have reduced the intensity of screen, there is relative expansion between screen itself and the water-cooling wall through walls in addition, the serious distortion distortion all appears shielding in a lot of boilers, aggravated the wearing and tearing of screen, caused the booster even the damage of shielding, this is to safeguarding that safe operation of the boiler also is disadvantageous.

Summary of the invention

Order of the present utility model is to overcome the shortcoming of above-mentioned prior art, the abrasionproof of screen in a kind of circulating fluid bed boiler is provided and has strengthened anti-deformation device, can reduce scouring intensity and the frequency of ash particle, play the abrasionproof effect, simultaneously the curtain wall pipe, can effectively alleviate the screen distortion, guaranteeing under the situation that requires to absorb heat, reducing the projected area and the height of screen, thereby helping alleviating the distortion tendency of screen, have and be easy to arrange the simple advantage of constructing.

For realizing above purpose, the technical solution of the utility model is, the abrasionproof of screen and reinforcement anti-deformation device in a kind of circulating fluid bed boiler, comprise the curtain wall pipe, it is characterized in that, on fin between curtain wall tube outer surface or pipe, install additional vertical or become the abrasionproofs of 15 degree below the angles to strengthen ribs with curtain wall, this abrasionproof is strengthened rib and is connected by welding manner with the curtain wall pipe.The thickness that abrasionproof is strengthened rib is no more than 20mm, and quantity can be more than 1 or 1, concrete shape can adopt " | " shape, " " " shape, "T"-shaped or "

" shape; the installation region that abrasionproof is strengthened rib can be highly zone or 3/4 following width regions below whole height and the width zone or 3/4 of curtain wall pipe; along highly arranging or be interrupted layout continuously; quantity can be more than 1 or 1 at interval; can also also can not lay and water material feeding shielding yielding eroded area or integral body, abrasionproof is strengthened rib itself watering material feeding and reinforce the abrasionproof processing.

The utility model proposes on the screen abrasion deformation basis in the abundant domestic circulating fluid bed boiler of investigation and analysis, can effectively solve screen wearing and tearing and problem on deformation in the circulating fluid bed boiler.

The utility model has the advantages that:

1. because abrasionproof is strengthened the existence of rib, can reduce scouring intensity and the frequency of ash particle, play the abrasionproof effect the curtain wall pipe.Simultaneously, abrasionproof is strengthened the intensity that rib has improved screen, can effectively alleviate the screen distortion;

2. abrasionproof is strengthened the effect that rib has played augmentation of heat transfer, thereby can guarantee under the situation that requires to absorb heat, and reduces the projected area and the height of screen, thereby helps alleviating the distortion tendency of screen;

3. be easy to arrange that construction is simple, both can be used for newly designing the abrasionproof of unit and strengthening anti-deformation, also can be used for the transformation of old unit.

Description of drawings

Fig. 1 is that screen is arranged sketch in the circulating fluid bed boiler.

Fig. 2 is the structure principle chart of curtain wall (3), wherein, (a) is front view, (b) is the A-A view.

Fig. 3 is the continuous position schematic diagram of screen abrasionproof stiffener in the circulating fluid bed boiler, wherein, (a) is front view, (b) is vertical view.

Fig. 4 is the part position schematic diagram of screen abrasionproof stiffener in the circulating fluid bed boiler, wherein, (a) is front view, (b) is vertical view.

Fig. 5 is the continuous position schematic diagram of screen abrasionproof stiffener in the circulating fluid bed boiler, wherein, (a) is front view, (b) is vertical view.

Fig. 6 is the profile schematic diagram of abrasionproof stiffener, wherein, (a) is histogram, (b) is circular diagram, (c) is down ladder diagram, (d) is trapezoid figure.

Fig. 7 is that the layout bar of abrasionproof stiffener is counted schematic diagram, wherein, is to arrange 1 schematic diagram (a), (b) is to arrange 2 schematic diagram, (c) is to arrange 3 schematic diagram, (d) is to arrange 4 schematic diagram.

Fig. 8 is screen abrasionproof stiffener continuous arrangement schematic diagram between difference screen pipe in the circulating fluid bed boiler, wherein, (a) is front view, (b) is vertical view.

Fig. 9 is that screen abrasionproof stiffener wherein, (a) is front view at 1 arrangement schematic diagram of difference screen pipe interbody spacer in the circulating fluid bed boiler, (b) is vertical view.

Figure 10 is that screen abrasionproof stiffener wherein, (a) is front view at many arrangement schematic diagrames of difference screen pipe interbody spacer in the circulating fluid bed boiler, (b) is vertical view.

The specific embodiment

Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are elaborated.

As shown in Figure 1, 2, the abrasionproof of screen and reinforcement anti-deformation device in a kind of circulating fluid bed boiler, this CFBB comprises boiler furnace 1, separator 2 and is arranged in curtain wall 3 in the boiler furnace 1, curtain wall 3 is tube panels that parallel and array of pipes is welded to form certain width and height by the fin between pipe by at least two screen pipes 4, it is characterized in that, on fin between curtain wall 3 tube outer surfaces or pipe, install abrasionproof additional and strengthen rib 5.

Shown in Figure 34,5, every position that shields abrasionproof reinforcement rib 5 on the pipe 4 can be any that continuous layout, part are arranged or interruption is arranged.The installation region that abrasionproof is strengthened rib can be highly zone or 3/4 following width regions below whole height and the width zone or 3/4 of curtain wall pipe.

As shown in Figure 6, the profile of abrasionproof stiffener 5 can be rectangle, annulus, fall any one or a few of trapezoidal or trapezoid, also can adopt " | " shape, " " " shape, "T"-shaped or

Shape.

As shown in Figure 7, the quantity of abrasionproof stiffener 5 can be more than 1 or 1.

Shown in Fig. 8,9,10, the mode that abrasionproof stiffener 5 is arranged between whole screen pipe can be to arrange continuously or the interval layout that spacing screen pipe number can be more than 1 or 1.

The structure that the utility model shields by reinforcement can increase the rigidity of screen effectively, reduces the distortion of screen.Simultaneously, the abrasionproof stiffener can play abrasionproof and rectification, and the Dual-Phrase Distribution of Gas olid that reduces high concentration in the stove alleviates the wearing and tearing of screen to washing away of shielding.

Claims

1, the abrasionproof of screen and reinforcement anti-deformation device in a kind of circulating fluid bed boiler, comprise the curtain wall pipe, it is characterized in that, on fin between curtain wall tube outer surface or pipe, install additional vertical or become the abrasionproofs of 15 degree below the angles to strengthen ribs with curtain wall.

According to the said device of claim 1, it is characterized in that 2, said abrasionproof is strengthened rib and is connected by welding manner with the curtain wall pipe.

According to the said device of claim 1, it is characterized in that 3, the thickness that said abrasionproof is strengthened rib is no more than 20mm, quantity can be more than 1 or 1.

4, according to claim 1 or 2 said devices, it is characterized in that, the installation region that said abrasionproof is strengthened rib can be highly zone or 3/4 following width regions below whole height and the width zone or 3/4 of curtain wall pipe, and layout can be arranged or be interrupted in the edge highly continuously.

According to the said device of claim 1, it is characterized in that 5, the interval quantity that said interruption is arranged can be more than 1 or 1.