Oxygen-enriched combustion system of sintering machine

Abstract

The invention discloses an oxygen-enriched combustion system of a sintering machine, which comprises an oxygen-enriched pipeline, an oxygen-enriched valve group, a combustion-supporting air pipeline and a sintering ignition burner which are connected in sequence, and mixed gas in the combustion-supporting air pipeline and coal gas at the sintering ignition burner are mixed and then combusted. An existing burner is improved, the coal gas burning efficiency of the sintering machine is improved, energy consumption is reduced, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the field of steel smelting, and in particular to an oxygen-enriched combustion system for a sintering machine. Background Art

[0002] The sintering machine is suitable for the sintering operation of large-scale ferrous metallurgical sintering plants, and is mainly suitable for the sintering treatment of iron ore powder in large and medium-sized sintering plants.

[0003] In the combustion process of the existing sintering machine ignition furnace, the insufficient oxygen concentration in the combustion-supporting air leads to incomplete combustion, which affects the output and quality of sintered ore and increases energy consumption and emissions. Therefore, it is particularly important to develop an oxygen-enriched combustion modification method that can effectively improve the combustion efficiency of the sintering machine. Summary of the invention

[0004] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides an oxygen-enriched combustion system for a sintering machine, which improves the existing burner, improves the combustion efficiency of the sintering machine gas, reduces energy consumption, and improves product quality.

[0005] Technical solution: An oxygen-enriched combustion system for a sintering machine of the present invention is characterized in that it includes an oxygen-enriched pipeline, an oxygen-enriched valve group, a combustion-supporting air pipeline and a sintering ignition burner connected in sequence, and the mixed gas in the combustion-supporting air pipeline is mixed with the coal gas at the sintering ignition burner and then burned.

[0006] Wherein, the oxygen-enriched pipeline is connected to an external oxygen production device or an oxygen pipeline, and the enriched oxygen is obtained through the oxygen production device or the oxygen pipeline.

[0007] Wherein, the oxygen concentration of the oxygen-enriched air is higher than the natural oxygen concentration in the air.

[0008] The oxygen-enriched air is introduced into the combustion air pipeline of the sintering machine through the pipeline system to replace part of the ordinary air for combustion.

[0009] After the sintering machine is in normal production, the oxygen-enriched valve group is opened to lead the enriched oxygen in the oxygen-enriched pipeline into the combustion-supporting air pipeline, where it is mixed with the combustion-supporting air and then enters the sintering ignition burner through the pipeline to mix with the coal gas and then burn.

[0010] According to the requirements of the sintering process for the ignition temperature, the oxygen enrichment rate of the sintering combustion is adjusted and the air-fuel ratio is controlled by adjusting the parameters of the oxygen enrichment valve group.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention improves the combustion efficiency of blast furnace gas in the sintering machine, reduces the generation of incomplete combustion products, improves the output and quality of sintered ore, reduces gas consumption by more than 10%, and reduces carbon dioxide emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] In the figure, 1 is the oxygen-enriched pipeline; 2 is the oxygen-enriched valve group; 3 is the combustion-supporting air pipeline; 4 is the coal gas; and 5 is the sintering ignition burner. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0015] The oxygen-enriched combustion system of the sintering machine of the present invention comprises an oxygen-enriched pipeline 1, an oxygen-enriched valve group 2, a combustion-supporting air pipeline 3 and a sintering ignition burner 5 which are connected in sequence. The mixed gas in the combustion-supporting air pipeline 3 is mixed with the coal gas 4 at the sintering ignition burner 5 and then burns. Among them, the oxygen-enriched pipeline 1 is connected to an external oxygen-generating device or an oxygen pipeline, and the enriched oxygen is obtained through the oxygen-generating device or the oxygen pipeline. The oxygen concentration of the enriched oxygen is higher than the natural oxygen concentration in the air. The enriched oxygen is introduced into the combustion-supporting air pipeline 3 of the sintering machine through the pipeline system, replacing part of the ordinary air for combustion.

[0016] When in use, after the sintering machine is in normal production, the oxygen-enriching valve group 2 is opened to introduce the oxygen-enriching pipe 1 into the combustion-supporting air pipe 3, and then mixed with the combustion-supporting air and enter the sintering ignition burner 5 through the pipe to mix with the coal gas 4 and then burn. The sintering process requires the ignition temperature, and by adjusting the parameters of the oxygen-enriching valve group (2), the oxygen-enriching rate of the sintering combustion is adjusted, and the air-fuel ratio is controlled to achieve the optimal air-fuel ratio.

[0017] The control function and equipment of the oxygen-enriched system of the present invention: an oxygen-enriched flow regulating device is designed to automatically adjust the oxygen-enriched flow according to the operating conditions and process requirements of the sintering machine. The present invention is equipped with a safety monitoring and alarm system to monitor the pressure, temperature and other parameters in the oxygen-enriched system in real time to ensure the safe and stable operation of the system. The design of the oxygen-enriched pipeline system of the present invention: a reasonable oxygen-enriched air delivery pipeline is designed to ensure that the oxygen-enriched air can be evenly and stably delivered to the combustion area of ​​the sintering machine. The public auxiliary supporting facilities and safety precautions of the present invention: corresponding public auxiliary supporting facilities, such as electrical systems, safety interlocking systems, etc. are designed to support the normal operation of the oxygen-enriched combustion system. The present invention formulates detailed safety precautions, including fire prevention, gas leak detection and alarm, etc., to ensure the safe operation of the modified sintering machine.

[0018] The present invention introduces enriched oxygen into the combustion-supporting air to increase the oxygen concentration of the combustion-supporting air, thereby achieving efficient combustion, reducing the generation of incomplete combustion products, improving the output and quality of sintered ore, and reducing energy consumption and emissions.

Claims

1. An oxygen-enriched combustion system for a sintering machine, characterized in that: It comprises an oxygen-enriched pipeline (1), an oxygen-enriched valve group (2), a combustion-supporting air pipeline (3) and a sintering ignition burner (5) which are connected in sequence. The mixed gas in the combustion-supporting air pipeline (3) is mixed with the coal gas (4) at the sintering ignition burner (5) and then burns.

2. The oxygen-enriched combustion system of a sintering machine according to claim 1, characterized in that: The oxygen-enriched pipeline (1) is connected to an external oxygen production device or an oxygen pipeline, and the enriched oxygen is obtained through the oxygen production device or the oxygen pipeline.

3. The oxygen-enriched combustion system of a sintering machine according to claim 2, characterized in that: The oxygen concentration of the oxygen-enriched air is higher than the natural oxygen concentration in the air.

4. The oxygen-enriched combustion system of a sintering machine according to claim 3, characterized in that: The oxygen-enriched air is introduced into the combustion-supporting air pipeline (3) of the sintering machine through the pipeline system, replacing part of the ordinary air for combustion.

5. The oxygen-enriched combustion system for a sintering machine according to any one of claims 1 to 4, characterized in that: After the sintering machine is in normal production, the oxygen-enriching valve group (2) is opened to introduce the enriched oxygen in the oxygen-enriching pipeline (1) into the combustion-supporting air pipeline (3), where it is mixed with the combustion-supporting air and then enters the sintering ignition burner (5) through the pipeline to mix with the coal gas (4) and then burn.

6. The oxygen-enriched combustion system for a sintering machine according to claim 5, characterized in that: According to the requirements of the sintering process for the ignition temperature, the oxygen enrichment rate of the sintering combustion is adjusted by adjusting the parameters of the oxygen enrichment valve group (2) to control the air-fuel ratio.

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