CN219414765U

CN219414765U - Low-oxidation-rate combined type heat storage burner and heating furnace using same

Info

Publication number: CN219414765U
Application number: CN202320256180.4U
Authority: CN
Inventors: 朱锦铭; 龙建荣; 吴连卿
Original assignee: Huatian Engineering and Technology Corp MCC
Current assignee: Huatian Engineering and Technology Corp MCC
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-25
Anticipated expiration: 2033-02-20

Abstract

The utility model discloses a low-oxidation-rate combined type heat storage burner and a heating furnace using the burner. The combined type heat accumulating burner is an integrated type combined burner which is arranged up and down, wherein the air heat accumulating burner is positioned at the upper part, and the gas heat accumulating burner is positioned at the lower part; or the air heat accumulating burner is positioned at the lower part and the gas heat accumulating burner is positioned at the upper part. The structure disclosed by the utility model is applied to the heat supply of the combustion system of the blast furnace gas double-heat-storage steel rolling heating furnace in the steel rolling process of the steel enterprise, can obviously reduce the generation rate of iron scales of steel billets in the heating process, reduce the labor intensity of workers for removing the iron scales, and effectively prolong the service life of refractory materials of the heating furnace.

Description

Low-oxidation-rate combined type heat storage burner and heating furnace using same

Technical Field

The utility model relates to a low-oxidation-rate combined type regenerative burner and a heating furnace using the same.

Background

At present, a blast furnace gas-fired double heat storage heating furnace is used as heating equipment before rolling steel, and is widely applied to various iron and steel enterprises nowadays. However, the structural arrangement mode of the traditional blast furnace gas double-heat-storage burner is that the gas burner and the air burner are arranged in a left-right split mode, so that oxygen in the air is contacted with a heated billet before the oxygen does not participate in combustion, and a layer of oxide scale is generated on the surface of the billet in a high-temperature environment.

Oxidation of steel not only increases metal loss, but also causes a series of adverse consequences. If the iron scale on the surface of the steel is not fallen off during rolling, the steel is pressed into the steel billet, and the quality of the steel is seriously affected; due to the existence of the iron scale, the tight die forging cannot be performed; in order to remove the oxidized iron sheet on the surface of the steel, equipment such as high-pressure water flushing, acid washing, shot blasting and the like is additionally arranged, so that the production process is increased; in addition, the generated iron oxide scale falls in the furnace, so that the furnace body is corroded, the service life of the furnace is influenced, and heavy manual labor is added for removing slag, so that the operation rate is influenced.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a novel low-oxidation-rate combined type heat storage burner and a heating furnace using the burner.

In order to achieve the purpose, the combined type heat accumulating burner with low oxidation rate is an upper and lower combined type heat accumulating burner, wherein the air heat accumulating burner is positioned at the upper part, and the gas heat accumulating burner is positioned at the lower part; or the air heat accumulating burner is positioned at the lower part and the gas heat accumulating burner is positioned at the upper part.

Further, the air heat accumulating burner and the gas heat accumulating burner are connected together through more than two square steel.

Further, an air burner block is arranged at the rear part of the air heat storage burner; and a gas burner block is arranged at the rear part of the gas heat storage burner.

In order to achieve the purpose, the heating furnace is provided with the low-oxidation-rate combined type regenerative burner in a row on the heating furnace body.

Further, the gas heat accumulating burner is arranged close to the position of the steel billet.

The structure of the utility model is applied to the heat supply of the combustion system of the blast furnace gas-fired double heat storage steel rolling heating furnace in the steel rolling process of steel enterprises, can obviously reduce the generation rate of iron scales of billets in the heating process and the labor intensity of workers for removing the iron scales, and effectively prolongs the service life of the refractory materials of the heating furnace

Drawings

FIG. 1 is a schematic diagram of a low oxidation rate combined type regenerative burner in accordance with an embodiment of the present utility model;

FIG. 2 is a view in the B direction of FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure A- -A of FIG. 1;

FIG. 4 is an enlarged schematic view of the regenerative burner of FIG. 1;

FIG. 5 is a schematic view in section B-B of FIG. 4;

FIG. 6 is an enlarged schematic view of the burner block of FIG. 1;

FIG. 7 is a schematic cross-sectional view of C-C of FIG. 6;

FIG. 8 is a schematic diagram showing the arrangement of the low oxidation rate combined type regenerative burner on the heating furnace.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

First, the oxidation process of steel in a heating furnace was analyzed:

Fe+1/2O ₂ →FeO

3Fe+1/2O ₂ →Fe ₃ O ₄

2Fe ₃ O ₄ +1/2O ₂ →3Fe ₂ O ₃

as can be seen from the three chemical equations above, the basic conditions for oxidation of steel during heating are three: firstly, the existence of oxygen or an oxidizing medium (such as water vapor, carbon dioxide and the like) is needed; secondly, oxygen (or an oxidizing medium) is contacted with iron to diffuse the iron; finally, certain chemical reaction conditions such as temperature, concentration and the like are needed.

According to the basic condition analysis for generating oxidation, under the condition that the complete combustion of gas is satisfied, the proportion of air and gas is reduced, and in addition, the contact of oxygen (or an oxidation medium) and iron is avoided or reduced as much as possible to be diffused, so that the burning loss of steel in the heating process is reduced, and the yield and the product quality are improved.

In an embodiment of the present utility model, as shown in fig. 1 to 7, the combined type heat storage burner with low oxidation rate is an integrated type combined burner arranged up and down, wherein the air heat storage burner 1 is located at the upper part, and the gas heat storage burner 5 is located at the lower part; or the air heat accumulating burner 1 is positioned at the lower part, and the gas heat accumulating burner 5 is positioned at the upper part.

In order to ensure good cooling effect of the burner housing, more than two square steels 6 are used for fixing the housing of the air heat storage burner 1 and the housing of the gas heat storage burner 5 in a welding conjuncted manner as shown in the figure.

An air burner block 2 is arranged at the rear part of the air heat storage burner 1; the rear part of the gas heat storage burner 5 is provided with a gas burner block 4.

As an example of the heating furnace of the present utility model, as shown in fig. 8, the above-mentioned low oxidation rate combined type heat storage burners are provided in a row on the heating furnace body. The installation should be carried out by paying attention to the upper and lower positions of the air and gas burner, and the gas burner should be close to one side of the billet. And before pouring the furnace wall refractory, the gap between the air burner and the gas burner is tightly filled with high-temperature resistant fiber cotton 3.

The actual production process of the heating furnace can refer to the following steps:

1) The air heat accumulating burner shell and the gas heat accumulating burner shell are manufactured according to the single design drawing.

2) The air heat accumulating burner housing and the gas heat accumulating burner housing are fixed by adopting a welding conjuncted body as shown in the figure by using square steel 6.

3) And pouring the refractory material on the heat insulation material according to the drawing, and baking according to the requirement to achieve the installation strength.

4) The air burner block 2 and the gas burner block 4 are manufactured according to design drawings respectively and baked according to requirements to achieve installation strength.

5) According to the installation diagram, the combined burner is installed on the steel structure of the heating furnace body, and the upper and lower positions of the air burner and the gas burner are noted during installation, so that the gas burner is ensured to be close to one side of a steel billet, as shown in fig. 8.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The combined type heat accumulating burner with the low oxidation rate is characterized in that the combined type heat accumulating burner is an upper and lower combined type heat accumulating burner, wherein the air heat accumulating burner is positioned at the upper part, and the gas heat accumulating burner is positioned at the lower part; or the air heat accumulating burner is positioned at the lower part and the gas heat accumulating burner is positioned at the upper part.

2. A low oxidation rate combined heat accumulation burner as in claim 1 wherein said air heat accumulation burner and said gas heat accumulation burner are connected by two or more square steels.

3. The low oxidation rate combined heat accumulation burner as in claim 1, wherein an air burner block is provided at the rear of the air heat accumulation burner; and a gas burner block is arranged at the rear part of the gas heat storage burner.

4. A heating furnace, characterized in that the low oxidation rate combined type regenerative burner according to claim 1 is arranged in a row on the furnace body of the heating furnace.

5. The furnace of claim 4, wherein the gas regenerative burner is disposed adjacent to the billet.