CN107655019B

CN107655019B - Anti-wear structure for joint of back wall of rising flue and front wall of falling flue of waste heat boiler

Info

Publication number: CN107655019B
Application number: CN201710933464.1A
Authority: CN
Inventors: 马志莉; 徐建新
Original assignee: Suzhou Hailu Heavy Industry Co Ltd
Current assignee: Suzhou Hailu Heavy Industry Co Ltd
Priority date: 2017-10-10
Filing date: 2017-10-10
Publication date: 2023-07-28
Anticipated expiration: 2037-10-10
Also published as: CN107655019A

Abstract

The invention discloses an anti-wear structure for the joint of a back wall of an ascending flue and a front wall of a descending flue of a waste heat boiler. The invention has the advantage of preventing the pipe wall at the joint of the back wall of the ascending flue and the front wall of the descending flue from being worn and dust and slag.

Description

Anti-wear structure for joint of back wall of rising flue and front wall of falling flue of waste heat boiler

Technical Field

The invention relates to a nonferrous smelting waste heat boiler, in particular to an anti-wear structure at the joint of a rear wall of an ascending flue and a front wall of a descending flue of the heat boiler.

Background

The non-ferrous smelting waste heat boiler generally adopts a vaporization cooling flue structure to recycle waste heat of high-temperature dust-containing flue gas generated in the smelting process. The non-ferrous smelting Ausmelt waste heat boiler mainly comprises a transition section formed by a membrane water wall type, an ascending flue, a descending flue and a horizontal flue, wherein a back wall of the ascending flue and a front wall of the descending flue are connected together in a fin butt welding mode, and the back wall of the ascending flue and the front wall of the descending flue are connected to form a reversed V shape. At present, in the actual operation process of the nonferrous smelting waste heat boiler, the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue is extremely easy to be directly eroded by high-temperature dust-containing flue gas to be worn, and the phenomenon of dust accumulation and slag accumulation is easy to occur, so that the safe operation of the nonferrous smelting waste heat boiler is not facilitated.

Disclosure of Invention

The invention aims to provide an anti-abrasion structure for the joint of the back wall of the rising flue and the front wall of the falling flue of a waste heat boiler, which can effectively prevent the abrasion of the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue.

In order to achieve the above purpose, the invention adopts the following technical scheme: the anti-wear structure for the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler is characterized in that a plurality of inverted V-shaped bending plates are covered on the joint pipe wall of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler at intervals, the inverted V-shaped bending plates are fixed on the joint pipe wall of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler through connecting mechanisms, an inverted V-shaped bending strip capable of covering a gap between the two inverted V-shaped bending plates is respectively arranged on the outer wall of one of every two adjacent inverted V-shaped bending plates, and all the inverted V-shaped bending plates and the inverted V-shaped bending strip jointly form an anti-wear layer capable of completely covering the joint pipe wall of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler.

Further, the aforesaid exhaust-heat boiler rising flue back wall and decline flue front wall junction abrasionproof structure, wherein: the structure of the connecting mechanism is as follows: a plurality of positioning round steels are fixed on the back wall of the rising flue, a plurality of mounting holes corresponding to the positioning round steels are formed in the inverted V-shaped bending plate, the inverted V-shaped bending plate is hung on the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler through buckling the mounting holes on the corresponding positioning round steels, and after the mounting holes of the inverted V-shaped bending plate are buckled on the corresponding positioning round steels, limiting plates larger than the mounting holes are welded at the outer end parts of the positioning round steels respectively, and the inverted V-shaped bending plates are limited and fixed on the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler through the limiting plates.

Further, the aforesaid exhaust-heat boiler rising flue back wall and decline flue front wall junction abrasionproof structure, wherein: the clearance between two adjacent lambada-shaped bending plates is 10mm.

Through implementation of the technical scheme, the invention has the beneficial effects that: (1) The wear-resistant layer of the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler is completely covered by a layer formed by all the inverted V-shaped bending plates and the inverted V-shaped bending strips, so that the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue is prevented from being directly flushed by high-temperature dust-containing flue gas, the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue is effectively prevented from being worn and deposited, and the operation safety of the nonferrous smelting waste heat boiler is ensured; (2) The lambada-shaped bending strips are welded on the outer wall of one lambada-shaped bending plate of the two adjacent lambada-shaped bending plates, so that an expansion gap can be reserved between the adjacent lambada-shaped bending plates, and the operation safety of the nonferrous smelting waste heat boiler is further ensured.

Drawings

Fig. 1 is a schematic structural view of an abrasion-proof structure at the joint of a back wall of an ascending flue and a front wall of a descending flue of a waste heat boiler.

Fig. 2 is a schematic diagram of the structure in the right view direction of fig. 1.

Fig. 3 is an enlarged schematic view of the H site shown in fig. 2.

Fig. 4 is a schematic structural view of the Λ -shaped bent plate shown in fig. 2.

Detailed Description

The invention will be further described with reference to the drawings and the specific examples.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the anti-wear structure at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler is characterized in that a plurality of Λ -shaped bending plates 3 are covered on the pipe wall at the joint of the back wall 1 of the rising flue and the front wall 2 of the falling flue of the waste heat boiler at intervals, the gaps between two adjacent Λ -shaped bending plates are 10mm, the Λ -shaped bending plates 3 are fixed on the pipe wall at the joint of the back wall 1 of the rising flue and the front wall 2 of the falling flue of the waste heat boiler through a connecting mechanism, a Λ -shaped bending strip 4 capable of covering the gap between the two Λ -shaped bending plates 3 is respectively arranged on the outer wall of one Λ -shaped bending plate 3 of every two adjacent Λ -shaped bending plates, and all the Λ -shaped bending plates 3 and the Λ -shaped bending strips 4 jointly form an anti-wear layer which completely covers the pipe wall at the joint of the back wall 1 of the rising flue of the waste heat boiler and the front wall 2 of the falling flue; in this embodiment, the structure of the connection mechanism is: a plurality of positioning round steels 5 are fixed on the back wall 1 of the rising flue, a plurality of mounting holes 6 corresponding to the positioning round steels 5 are arranged on the inverted V-shaped bending plate 3, the inverted V-shaped bending plate 3 is hung on the pipe wall at the joint of the back wall 1 of the rising flue and the front wall 2 of the falling flue through buckling the mounting holes 6 on the corresponding positioning round steels 5, and after the mounting holes 6 of the inverted V-shaped bending plate 3 are buckled on the corresponding positioning round steels 5, a limiting plate 7 larger than the mounting holes 6 is welded at the outer end part of each positioning round steel 5 respectively, the inverted V-shaped bending plate 3 is limited and fixed on the pipe wall at the joint of the back wall 1 of the rising flue and the front wall 2 of the falling flue through the limiting plate 7;

in the actual operation process of the nonferrous smelting waste heat boiler, as the wear-resistant layer which completely covers the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler is formed by all the inverted V-shaped bending plates and the inverted V-shaped bending strips, high-temperature dust-containing flue gas can directly wash the wear-resistant layer and cannot directly wash the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue, thereby effectively preventing the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue from wearing and depositing ash and slag and ensuring the operation safety of the nonferrous smelting waste heat boiler; and because the lambada-shaped bending strips are welded on the outer wall of one lambada-shaped bending plate in the two adjacent lambada-shaped bending plates, an expansion gap can be reserved between the adjacent lambada-shaped bending plates, and the operation safety of the nonferrous smelting waste heat boiler is further ensured.

Claims

1. Waste heat boiler rising flue back wall and decline flue front wall junction abrasionproof structure, its characterized in that: the pipe wall of the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler is covered with a plurality of inverted V-shaped bending plates at intervals, the inverted V-shaped bending plates are fixed on the pipe wall of the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler through a connecting mechanism, the outer wall of one inverted V-shaped bending plate of every two adjacent inverted V-shaped bending plates is respectively provided with an inverted V-shaped bending strip capable of covering the gap between the two inverted V-shaped bending plates, and all the inverted V-shaped bending plates and the inverted V-shaped bending strips form a layer of anti-wear layer capable of completely covering the pipe wall of the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler; the structure of the connecting mechanism is as follows: a plurality of positioning round steels are fixed on the back wall of the rising flue, a plurality of mounting holes corresponding to the positioning round steels are formed in the inverted V-shaped bending plate, the inverted V-shaped bending plate is hung on the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler by buckling the mounting holes on the corresponding positioning round steels, and after the mounting holes of the inverted V-shaped bending plate are buckled on the corresponding positioning round steels, a limiting plate larger than the mounting holes is welded at the outer end part of each positioning round steel respectively, and the inverted V-shaped bending plate is limited and fixed on the pipe wall at the joint of the back wall of the rising flue and the front wall of the falling flue of the waste heat boiler through the limiting plate; the clearance between two adjacent lambada-shaped bending plates is 10mm.