CN212584445U

CN212584445U - Flue gas pipeline

Info

Publication number: CN212584445U
Application number: CN202020682730.5U
Authority: CN
Inventors: 林荔; 周亮亮; 袁剑平
Original assignee: China Nerin Engineering Co Ltd
Current assignee: China Nerin Engineering Co Ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2021-02-23
Anticipated expiration: 2030-04-28

Abstract

A flue gas duct comprising: a pipe body; the first heat preservation and insulation layer is fixedly arranged on the inner side of the pipeline body; the fireproof wear-resistant layer is fixedly arranged on one side of the heat-insulation layer, which is far away from the pipeline body; the fixing plate is fixedly arranged on the inner side of the pipeline body and embedded into the first heat-preservation heat-insulation layer and the fireproof wear-resistant layer; and the second heat-insulating layer is fixedly arranged on one side of the fixed plate. The flue gas pipeline can greatly reduce the heat energy loss in the high-temperature dust-containing smelting flue gas conveying process and prevent the pipeline from being worn, and has low requirements on the material of the pipeline body, thereby reducing the pipeline cost.

Description

Flue gas pipeline

Technical Field

The utility model relates to a smelt technical field, especially relate to a flue gas pipeline.

Background

At present, a large amount of high-temperature dust-containing smelting flue gas can be generated in the industrial production of copper smelting, the temperature of the flue gas can reach 800-1200 ℃, and the dust-containing concentration of the flue gas can reach 10g/Nm³Above all, the requirements of the smelting flue gas on the pipeline are very high. The flue gas ducts generally used are mainly of the following two types:

(1) a pipeline made of heat-resistant stainless steel is adopted;

(2) adopting a carbon steel pipeline and lining with a concrete ramming castable.

The two pipelines have the disadvantages that the pipeline of the first process is expensive in manufacturing cost, is not wear-resistant, has short service life and is not suitable for smelting smoke with high dust concentration. The maximum use temperature of the lining material in the second process is 1000 ℃, and the lining material is not suitable for smelting smoke with high-temperature dust-containing concentration. And, these two kinds of pipelines all can't accomplish thermal-insulated, during the practical application, need additionally increase the heat preservation facility at the outer wall of flue gas pipeline, increased the construction degree of difficulty. Therefore, a brand new flue gas pipeline structure is urgently needed to adapt to the smelting flue gas containing high temperature dust.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a flue gas duct suitable for high temperature dust-containing smelting flue gas.

A flue gas duct comprising:

a pipe body;

the first heat preservation and insulation layer is fixedly arranged on the inner side of the pipeline body;

the fireproof wear-resistant layer is fixedly arranged on one side of the heat-insulation layer, which is far away from the pipeline body;

the fixing plate is fixedly arranged on the inner side of the pipeline body and embedded into the first heat-preservation heat-insulation layer and the fireproof wear-resistant layer;

and the second heat-insulating layer is fixedly arranged on one side of the fixed plate.

Further, above-mentioned flue gas pipeline, wherein, the pipeline body includes the pipeline that the multisection connects gradually, and is adjacent the pipeline passes through pipe compensator fixed connection, the fixed plate sets up the pipeline with the tip that pipe compensator is connected.

Further, in the flue gas pipeline, the second heat insulation layer is arranged on one side, far away from the pipeline compensator, of the fixing plate.

Further, in the flue gas pipeline, the thickness of the second heat-insulating layer is not less than the deformation displacement of the pipeline.

Further, in the flue gas pipeline, the first heat-insulating layer and the second heat-insulating layer are both made of medium-temperature aluminum silicate fiber boards.

Further, in the flue gas duct, the fixing plate and the duct body are made of steel material Q345B.

Further, in the flue gas duct, the refractory wear-resistant layer is made of clay refractory bricks.

Further, in the flue gas duct, the fixing plates are disposed at the corners of the duct body and at two sides of the duct compensator.

The utility model provides a flue gas pipeline through setting up first heat preservation insulating layer in pipeline body inboard, sets up fire-resistant wearing layer in the inboard of first heat preservation insulating layer, makes this flue gas pipeline stage property have good heat preservation and heat insulation properties to and fire-resistant wearing property is applicable to high temperature dusty smelting flue gas, and support and consolidate first heat preservation insulating layer fire-resistant wearing layer through the fixed plate, make this flue gas pipeline stable in structure. The flue gas pipeline can greatly reduce the heat energy loss in the high-temperature dust-containing smelting flue gas conveying process and prevent the pipeline from being worn, and has low requirements on the material of the pipeline body, thereby reducing the pipeline cost. And the pipeline construction process is simplified, and the construction efficiency is improved.

Drawings

Fig. 1 is a schematic view of a partial cross-sectional structure of a flue gas duct in an embodiment of the present invention;

fig. 2 is a sectional structure view of a flue gas duct in an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the area A in FIG. 1;

fig. 4 is an enlarged structural diagram of a region B in fig. 1.

Description of the main elements

Pipe body	10
		First heat insulation layer	20
Refractory wear-resistant layer	30
		Fixing plate	40
Second heat preservation and insulation layer	50
		Pipeline compensator	60

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The embodiment of the invention is given in the attached drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, this embodiment is provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, a flue gas duct according to an embodiment of the present invention includes a duct body 10, a first thermal insulation layer 20, a fire-resistant wear-resistant layer 30, a fixing plate 40, and a second thermal insulation layer 50.

Specifically, the pipe body 10 has a circular tube structure, and the material thereof may be low-cost low-carbon alloy steel, for example, a steel material Q345B.

The first thermal insulation layer 20 is fixedly disposed on the inner side of the pipeline body 10, and is coaxial with the pipeline body 10. The first heat preservation and insulation layer 20 is used for performing heat preservation and insulation functions and preventing heat in the pipeline from losing to the outside. The first heat-insulating layer 20 can be made of a medium-temperature aluminum silicate fiberboard, and has the advantages of low heat conductivity, high compressive strength, long service life, sound absorption, noise reduction, good toughness and the like.

This fire-resistant wearing layer 30 sets firmly in the inboard of first heat preservation insulating layer 20, sets up in the one side that pipeline body 10 was kept away from to first heat preservation insulating layer 30 promptly, and it sets up with pipeline body 10 is coaxial, and its mainly used strengthens the wearability of flue gas pipeline inner wall, strengthens the life of pipeline. The refractory wear-resistant layer 30 can be made of clay refractory bricks, the clay refractory bricks have good thermal property and are resistant to rapid cooling and rapid heating, and the refractoriness of the clay refractory bricks is as high as 1690-1730 ℃.

The fixing plate 40 is fixedly disposed on the inner side of the duct body 10 and embedded in the first thermal insulation layer 20 and the refractory wear layer 30, and is used for supporting the first thermal insulation layer 20 and the refractory wear layer 30, so as to enhance the installation stability thereof. The fixing plate 40 may be made of the same material as the pipe body 10, and the fixing plate 1 may be fixed to the pipe body 10 by welding or by steel nails.

The number and the installation position of the fixing plates 40 may be set according to actual needs, for example, both sides of the pipe compensator 60 installed on the pipe body 10 may be set. Generally, the pipe body 10 includes a plurality of pipes connected in sequence, adjacent pipes are fixedly connected by the pipe compensator 60, and the pipe compensator 60 compensates expansion and contraction caused by temperature change of the pipes. The fixing plate 40 is provided at an end of the pipe connected to the pipe compensator 60.

A certain gap needs to be reserved on the compensation displacement side of the fixing plate 40 to fill the second thermal insulation layer 50, and the compensation displacement side is the side of the fixing plate 40 away from the pipeline compensator 60, where the second thermal insulation layer 60 is located. The second thermal insulation layer 50 can be a thermal insulation material with a certain toughness, for example, a medium temperature type aluminum silicate fiberboard can be used, which not only has a thermal insulation function to prevent heat from being transferred to the pipeline body 10 through the fixing plate, but also has a certain toughness as the second thermal insulation layer 50. Therefore, the arrangement of the fixing plate 40 on the displacement compensation side can also play a certain buffering role to compensate and prevent the displacement generated by the expansion caused by heat and contraction caused by cold of the flue gas pipeline.

Further, the size of the gap (i.e. the thickness of the second insulating layer 50) should not be less than the deformation displacement of the flue gas duct. Because of the medium temperature in the flue gas pipeline is higher, the flue gas pipeline expands with heat and contracts with cold and produces deformation, and the deformation accessible extrusion second heat preservation insulating layer in its axial direction absorbs.

It is understood that in other embodiments of the present invention, the fixing baffle may be disposed at the corner of the pipe body 10 (generally, the vertical joint of two sections of pipes) and at both sides of the pipe compensator to further support and fix the pipe compensator.

During construction of the flue gas pipeline, one end part of the fixing plate 40 is fixed on the pipeline body 10, the first heat preservation and insulation layer 20 is fixed on the inner side of the pipeline body 10, the second heat preservation and insulation layer 50 is fixed on one side of the fixing plate 40, and the fireproof wear-resistant layer 30 is fixed on the inner side of the first heat preservation and insulation layer 20. It should be noted that the fixing plate 40 should be located inside the refractory and wear-resistant layer 30, i.e. the end of the fixing plate 40 should not protrude from the refractory and wear-resistant layer 30, so as to prevent the fixing plate 40 from being damaged by the flue gas.

The flue gas pipeline in this embodiment sets up first heat preservation insulating layer 20 through at pipeline body 10 inboard, sets up fire-resistant wearing layer in the inboard of first heat preservation insulating layer 20, makes this flue gas pipeline stage property have good heat preservation heat-proof quality to and fire-resistant wearability, be applicable to high temperature dusty smelting flue gas, and support and consolidate first heat preservation insulating layer 20 fire-resistant wearing layer through the fixed plate, make this flue gas pipeline stable in structure.

The flue gas pipeline in this embodiment can greatly hang down the heat energy loss and prevent the pipeline wearing and tearing in the high temperature dust-laden smelting flue gas transportation process, and has low requirement for the material of pipeline body, reduces the pipeline cost. And the pipeline construction process is simplified, and the construction efficiency is improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A flue gas duct, comprising:

a pipe body;

2. The flue gas duct according to claim 1, wherein the duct body comprises a plurality of ducts connected in sequence, adjacent ducts are fixedly connected by a duct compensator, and the fixing plate is disposed at an end of the duct connected to the duct compensator.

3. The flue gas duct of claim 2, wherein the second thermal insulation layer is disposed on a side of the fixing plate away from the duct compensator.

4. The flue gas duct according to claim 2, wherein the thickness of the second thermal insulation layer is not less than the deformation displacement of the duct.

5. The flue gas duct according to claim 1, wherein the first heat-insulating layer and the second heat-insulating layer are both made of medium-temperature type aluminum silicate fiber boards.

6. The flue gas duct according to claim 1, wherein the fixing plate and the duct body are made of a steel material of Q345B.

7. The flue gas duct of claim 1, wherein the refractory wear layer is made of clay refractory bricks.

8. The flue gas duct of claim 1, wherein the fixing plate is disposed at a corner of the duct body.