CN210979824U

CN210979824U - Inverted triangle-shaped redirection non-vortex anti-abrasion device of circulating fluidized bed boiler

Info

Publication number: CN210979824U
Application number: CN201921896744.0U
Authority: CN
Inventors: 刘军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-07-10
Anticipated expiration: 2029-11-06

Abstract

The utility model discloses an inverted triangle redirection non-vortex anti-abrasion device of a circulating fluidized bed boiler, which is positioned at the joint of a furnace water-cooled wall let tube and a vertical tube; the contact position of the upper half part of the anti-abrasion device and the water-cooled wall adopts an inverted triangle form, so that the thinner material of a deposition part in normal operation can be more effectively buffered for the internal circulation material descending along the water-cooled wall, the triangular convex part solves the problem that the material carried by primary air quickly ascends to directly impact and abrade the water-cooled wall, the eddy abrasion at the root part of the water-cooled wall of a conventional anti-abrasion beam can be overcome, and the effect of improving the long-period operation of the circulating fluidized bed boiler is achieved.

Description

Inverted triangle-shaped redirection non-vortex anti-abrasion device of circulating fluidized bed boiler

Technical Field

The utility model relates to a circulating fluidized bed boiler abrasionproof decreases technical field, specifically is a circulating fluidized bed boiler inverted triangle changes to no vortex abrasionproof decreases device.

Background

In recent ten years, circulating fluidized bed boilers develop rapidly in China, but the circulating fluidized bed boilers still have the technical problems that the water wall is frequently exploded due to serious hearth wear, the continuous operation period is short, and the like, wherein one of the parts with the most serious wear is a partial area of the upper water wall of a dense-phase area, and various wear-resistant manufacturers of the circulating fluidized bed boilers, such as hearth spraying, wear-resistant beams, metal protective tiles, blue mud, wear-resistant surfacing and the like, emerge on the market in order to overcome the continuous optimization of the fluidizing air speed of various design manufacturers. These commercial wear-proof measures are passive wear-proof measures, and have a certain effect of reducing wear, but have different disadvantages, such as repeated investment and spraying after a spraying layer is worn for 2 years, eddy current wear at the root of a conventional wear-proof beam, bed temperature rise due to influence of a plurality of wear-proof beams on heat transfer of a heating surface, and the like. After the marketized anti-abrasion measures are adopted, the continuous operation period of the circulating fluidized bed boiler can be only increased from about 180 days to about 200 to 300 days, a large difference exists between the continuous operation period of the circulating fluidized bed boiler and the continuous operation period of the pulverized coal furnace, and the development of the circulating fluidized bed boiler in China is severely restricted.

Through years of groping tests, I have researched the inverted triangle direction-changing non-vortex anti-abrasion device of the circulating fluidized bed boiler, respectively verified in 10 circulating fluidized bed boilers of Tianjin and other foreign enterprises and Liaoning heating power company, and after the adoption of the direction-changing non-abrasion device, the continuous operation period of the boiler can be rapidly increased to over 400 to 500 days, and the phenomenon of forced shutdown caused by abrasion and leakage of the upper pipe row of the dense-phase region never occurs for 5 years, so that a technical problem is solved for the long-term development of the circulating fluidized bed boiler in China.

Disclosure of Invention

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a circulating fluidized bed boiler inverted triangle-shaped changes to no vortex abrasionproof decreases device has both solved circulating fluidized bed boiler water wall and has let the wearing and tearing difficult problem of partial region more than the pipe, has overcome the water-cooling wall root vortex wearing and tearing of conventional abrasionproof roof beam again, has reached the effect that improves the long period of circulating fluidized bed boiler operation.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a circulating fluidized bed boiler inverted triangle changes to no vortex anti-abrasion device, lets pipe and vertical pipe part, its characterized in that including the furnace water-cooling wall: the water-cooling wall lets the top of pipe and the bottom fixed connection of the perpendicular pipe of water-cooling wall, the water-cooling wall lets the inner wall of pipe and the perpendicular union coupling of water-cooling wall be provided with the inverted triangle-shaped and changes to no vortex abrasionproof and decrease the device, the inverted triangle-shaped changes to no vortex abrasionproof and decreases the device and includes fin, water-cooling wall pipe and V type pin, the back and the water-cooling wall of fin let the inner wall fixed connection of pipe and the perpendicular pipe of water-cooling wall, the fixed surface of fin is provided with a plurality of water-cooling wall pipes, and is a plurality of the water-cooling wall pipe loops through fin interconnect, the fixed surface welding of fin has V type pin, the water-cooling wall lets the original.

Preferably, the V-shaped pins are made of Cr25Ni20 steel bars, and a plurality of the V-shaped pins are uniformly and symmetrically distributed on the fins at multiple angles and are positioned at the joint of the water-cooled wall let tube and the vertical tube.

Preferably, the fins, the water cooling wall tubes and the V-shaped pins are combined by casting the outer surface of the inverted-triangular redirection non-vortex abrasion-proof device through refractory abrasion-resistant casting materials, and the outer shape of the inverted-triangular redirection non-vortex abrasion-proof device is smoothly convex from bottom to top.

Preferably, the inner wall of the top of the inverted triangle redirection non-vortex anti-abrasion device and the inner wall of the water-cooled wall vertical pipe are provided with inverted triangle groove-shaped channels.

(III) advantageous effects

The utility model provides a circulating fluidized bed boiler inverted triangle changes to no vortex abrasionproof decreases device. The method has the following beneficial effects:

(1) the inverted triangle bend no-vortex anti-abrasion device of the circulating fluidized bed boiler is arranged by the inverted triangle bend no-vortex anti-abrasion device and the arrangement of the fins, the water wall pipe, the V-shaped pins and the inverted triangle groove, thereby playing the role that the contact part of the anti-abrasion device adopts an inverted triangle form to ensure that the deposited part of the anti-abrasion device is thinner in normal operation, more effectively buffering the inner circulation material descending along the water wall, and ensuring that the inner circulation material descending along the water wall in a hearth and the material ascending quickly in a dense phase region can not generate vortex at the root part of the water wall by the convex part of the triangle, thereby successfully solving the problem of the abrasion of the vortex at the root part of the conventional anti-abrasion beam,

(2) the device enables the materials which rapidly move upwards in the dense-phase region to not directly impact and wear the vertical water wall pipe any more by the whole convex appearance of smooth transition from bottom to top, thereby effectively avoiding wear and achieving the effect of improving the service cycle of the circulating fluidized bed boiler.

Drawings

FIG. 1 is a schematic view of the interior of the structure of the present invention;

FIG. 2 is an enlarged schematic view of a partial structure of the structure diagram of the present invention;

FIG. 3 is an enlarged detail view of the inside of the inverted triangle redirection eddy-current-free anti-abrasion device of the present invention;

fig. 4 is an enlarged schematic view of the section a-a of the structure of fig. 3 of the present invention;

FIG. 5 is an analysis of the interior of the furnace structure without wear protection;

fig. 6 is a structural diagram of a conventional wear-resistant beam of a conventional circulating fluidized bed boiler.

In the figure: 1. a water wall let-off tube; 2. a water-cooled wall vertical tube; 3. the inverted triangle is redirected to a non-vortex anti-abrasion device; 4. the original anti-wear castable; 5. a fin; 6. a water wall tube; 7. a V-shaped pin; 8. an inverted triangular groove-shaped channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-6, the utility model provides a technical solution: an inverted triangle bend no-vortex abrasion-proof device of a circulating fluidized bed boiler comprises a water wall let tube 1 and a water wall vertical tube 2, the bottoms of the water wall let tube 1 and the water wall vertical tube 2 are fixedly connected by the device, the inner wall of the joint of the water wall let tube 1 and the water wall vertical tube 2 is provided with an inverted triangle bend no-vortex abrasion-proof device 3, the inverted triangle bend no-vortex abrasion-proof device 3 comprises a fin 5, a water wall tube 6 and a V-shaped pin 7, the V-shaped pin 7 is made of Cr25Ni20 steel bars, a plurality of V-shaped pins 7 are respectively and symmetrically distributed on the fin 5 in a multi-angle manner, the inverted triangle bend no-vortex abrasion-proof device 3 has a more stable effect by the arrangement of the V-shaped pins 7, the back surface of the fin 5 is fixedly connected with the inner wall of the water wall let tube 1 and the water wall vertical tube 2, the V-shaped pins 7 are fixedly welded on the, the fin 5 of the inverted triangle bend vortex-free anti-abrasion device 3 is cast on the outer surface of the inverted triangle bend vortex-free anti-abrasion device 3 through a refractory wear-resistant casting material, the water wall tube 6 is combined with the V-shaped pin 7, the inner wall of the top of the inverted triangle bend vortex-free anti-abrasion device 3 and the inner wall of the water wall vertical tube 2 are provided with inverted triangle groove-shaped channels 8, the inverted triangle groove-shaped channels 8 can effectively receive and buffer part of thin materials, the outward convex appearance prevents the materials which go upward fast from directly impacting and abrading the water wall, and the outward convex appearance enables the materials which go upward and the internal circulation materials which go downward along the water wall to move outward towards a punching point, so that the effect of. Therefore, the device successfully solves the problem of serious abrasion of the water wall in the upper area of the tube and overcomes the problem of root abrasion of the water wall which cannot be solved by the conventional anti-abrasion beam. The object of improving the long-term continuous operation of a circulating fluidized bed boiler is achieved, while what is not described in detail in this description is known to the person skilled in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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 utility model provides a circulating fluidized bed boiler inverted triangle changes to no vortex anti-abrasion device, lets pipe (1) and vertical pipe (2) part, its characterized in that including the furnace water-cooling wall: the top of the tube (1) is fixedly connected with the bottom of the vertical tube (2) of the water wall by the water wall, the inner wall of the joint of the water wall let tube (1) and the water wall vertical tube (2) is provided with an inverted triangle redirection non-vortex anti-abrasion device (3), the inverted triangle redirection vortex-free abrasion-proof device (3) comprises fins (5), water-cooling wall tubes (6) and V-shaped pins (7), the back of the fin (5) is fixedly connected with the inner wall of the water wall vertical tube (2) through the tube (1), a plurality of water-cooling wall tubes (6) are fixedly arranged on the surface of the fin (5), the water-cooling wall tubes (6) are connected with each other through the fin (5) in sequence, the surface of the fin (5) is fixedly welded with a V-shaped pin (7), and the inner wall of the water-cooled wall let tube (1) is fixedly connected with the original anti-abrasion castable (4).

2. The inverted triangular redirection non-vortex wear prevention device of the circulating fluidized bed boiler of claim 1, wherein: the V-shaped pins (7) are made of Cr25Ni20 steel bars, and the V-shaped pins (7) are uniformly and symmetrically distributed on the fins (5) at multiple angles and are positioned at the joint of the water-cooled wall let tube and the vertical tube.

3. The inverted triangular redirection non-vortex wear prevention device of the circulating fluidized bed boiler of claim 1, wherein: the surface of the inverted triangle redirection non-vortex abrasion-proof device (3) is cast by refractory and abrasion-proof casting materials to combine the fins (5), the water wall tubes (6) and the V-shaped pins (7), and the shape is smoothly convex from bottom to top.

4. The inverted triangular redirection non-vortex wear prevention device of the circulating fluidized bed boiler of claim 1, wherein: the inner wall of the top of the inverted triangle redirection non-vortex abrasion-proof device (3) and the inner wall of the water-cooled wall vertical pipe (2) are provided with inverted triangle groove-shaped channels (8).