Method for quickly confirming proper air-fuel ratio of ignition furnace

Abstract

The invention provides a method for quickly confirming a proper air-fuel ratio of an ignition furnace. The method comprises the following steps: collecting the gas amount of the ignition furnace to obtain the gas usage amount; collecting the amount of air used by the ignition furnace to obtain the air usage amount; the ignition temperature of the ignition furnace is obtained under the conditions of different coal gas usage amounts and different air usage amounts, and the corresponding air-fuel ratio is calculated; under the condition of the same coal gas usage amount, ignition temperatures corresponding to different air-fuel ratios are obtained, and the air-fuel ratio corresponding to the highest ignition temperature serves as the optimal air-fuel ratio under the current coal gas flow condition. And the phenomena of gas consumption increase and environment pollution caused by insufficient gas combustion can be eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy, and in particular to a method for quickly confirming a suitable air-fuel ratio of an ignition furnace. Background Art

[0002] Sintering is the front link of the ironmaking process. The quality of the sintered product - sintered ore plays a vital role in the quality and high yield, low consumption and low cost of blast furnace ironmaking. Ignition is an important part of the sintering production process. This link must ensure that the gas and air in the ignition furnace are fully burned and reach the ignition temperature requirement to smoothly ignite the sintering material surface. If the air volume is too low to ensure that the gas is fully burned, it will cause gas waste, the ignition temperature will not meet the requirements, and a large amount of incompletely burned gas will be generated to pollute the environment. At present, some sintering companies still perform manual operations by manually adjusting after observing the flame. This will be seriously affected by the experience level of the personnel and it is difficult to promote standardization. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a method for quickly confirming the appropriate air-fuel ratio of an ignition furnace.

[0004] To achieve the above objectives, the present invention provides the following solutions:

[0005] A method for quickly confirming a suitable air-fuel ratio of an ignition furnace comprises:

[0006] The amount of gas used by the ignition furnace is collected to obtain the amount of gas used;

[0007] The amount of air used by the ignition furnace is collected to obtain the air usage;

[0008] Obtain the ignition temperature of the ignition furnace under different gas usage and different air usage conditions, and calculate the corresponding air-fuel ratio;

[0009] Under the condition of the same gas usage, the ignition temperatures corresponding to different air-fuel ratios are obtained, and the air-fuel ratio corresponding to the highest ignition temperature is taken as the optimal air-fuel ratio under the current gas flow conditions.

[0010] Preferably, the gas volume at each point in the ignition furnace is collected within one hour to obtain the gas volume at each point, and the gas usage is obtained by arithmetically averaging the gas volume at each point.

[0011] Preferably, the air volume at each point in the ignition furnace is collected within one hour to obtain the air volume at each point, and the air volume at each point is arithmetic averaged to obtain the air usage;

[0012] Preferably, the air-fuel ratio is calculated as follows: air usage / gas usage.

[0013] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0014] The present invention provides a method for quickly confirming the appropriate air-fuel ratio of an ignition furnace. Compared with the prior art, the present invention can eliminate the phenomenon of increased gas consumption and environmental pollution caused by incomplete gas combustion by actually measuring the usage of gas and air and combining it with the acquisition of ignition temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A circuit diagram of an overcurrent alarm module provided by the present invention;

[0017] Figure 2 A working principle diagram of a method for quickly confirming a suitable air-fuel ratio of an ignition furnace provided by the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a series of steps, processes, methods, etc. are not limited to the listed steps, but may optionally include steps that are not listed, or may optionally include other step elements inherent to these processes, methods, products or devices.

[0021] In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] See also Figure 1-2 , a method for quickly confirming the appropriate air-fuel ratio of the ignition furnace, comprising:

[0023] Step 1: Collect the gas consumption of the ignition furnace to obtain the gas consumption;

[0024] In practical applications, it is necessary to collect the gas volume at each point in the ignition furnace within one hour to obtain the gas volume at each point, and then perform arithmetic averaging on the gas volume at each point to obtain the gas usage. This can prevent abnormal values ​​caused by gas pressure fluctuations from being used for analysis.

[0025] Step 2: Collect the amount of air used by the ignition furnace to obtain the air usage;

[0026] In step 2, the air volume at each point in the ignition furnace is collected within one hour to obtain the air volume at each point, and the air usage is obtained by arithmetically averaging the air volume at each point.

[0027] Step 3: Obtain the ignition temperature of the ignition furnace under different gas usage and different air usage conditions, and calculate the corresponding air-fuel ratio; wherein the calculation formula of the air-fuel ratio is: air usage / gas usage.

[0028] Step 4: Under the condition of the same gas usage, obtain the ignition temperatures corresponding to different air-fuel ratios, and take the air-fuel ratio corresponding to the highest ignition temperature as the optimal air-fuel ratio under the current gas flow conditions.

[0029] The present invention uses a table to record the hourly gas consumption, hourly air consumption, ignition temperature, material thickness, and machine speed. Because under the appropriate air-fuel ratio, the gas can be fully burned without excess air to reduce the flame temperature, and the flue gas volume will not be too high to cause the ignition temperature to drop. Therefore, under the premise of normal material speed and machine speed, the gas consumption, air-fuel ratio, and ignition temperature are counted, and the format is in a step size of 100-200m 3 The rows are the gas flow rate of / h, the columns are the air-fuel ratios with a step size of 0.2-0.5, and the crossover value is the average ignition temperature under this condition. Figure 2 As shown in the rightmost total column, it can be seen that the average ignition temperature of the gas volume in the 2600-2800 rows is 1046℃, while the 1800-2000m 3 / h The average value of the row is 1045℃, indicating that the gas is not fully burned under the condition of 2600-2800; it can also be seen from the gas flow rate in each row that under the same gas flow rate conditions, the average ignition temperature under high air-fuel ratio conditions on the right is significantly higher than that under low air-fuel ratio conditions on the left, and under the conditions of 1000-1200 gas volume, after the air-fuel ratio is greater than 9, the ignition temperature begins to decrease, indicating that the suitable air-fuel ratio is in the range of 7.5-9, the gas is not fully burned when the air-fuel ratio is less than 7.5, and the air-fuel ratio is greater than 9, although the gas is fully burned, there is too much air, which reduces the ignition temperature.

[0030] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0031] The present invention provides a method for quickly confirming the appropriate air-fuel ratio of an ignition furnace. Compared with the prior art, the present invention can eliminate the phenomenon of increased gas consumption and environmental pollution caused by incomplete gas combustion by actually measuring the usage of gas and air and combining it with the acquisition of ignition temperature.

[0032] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the method disclosed in the embodiment, since it corresponds to the device disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the device part description.

[0033] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for quickly confirming the appropriate air-fuel ratio of an ignition furnace, characterized in that: include: The amount of gas used by the ignition furnace is collected to obtain the amount of gas used; The amount of air used by the ignition furnace is collected to obtain the air usage; Obtain the ignition temperature of the ignition furnace under different gas usage and different air usage conditions, and calculate the corresponding air-fuel ratio; Under the condition of the same gas usage, the ignition temperatures corresponding to different air-fuel ratios are obtained, and the air-fuel ratio corresponding to the highest ignition temperature is taken as the optimal air-fuel ratio under the current gas flow conditions.

2. A method for quickly confirming the appropriate air-fuel ratio of an ignition furnace as claimed in claim 1, characterized in that: The gas volume at each point in the ignition furnace is collected within one hour to obtain the gas volume at each point, and the gas usage is obtained by arithmetically averaging the gas volume at each point.

3. A method for quickly confirming the appropriate air-fuel ratio of an ignition furnace as claimed in claim 2, characterized in that: The air volume at each point in the ignition furnace is collected within one hour to obtain the air volume at each point, and the air usage is obtained by arithmetically averaging the air volume at each point.

4. A method for quickly confirming the appropriate air-fuel ratio of an ignition furnace as claimed in claim 3, characterized in that: The air-fuel ratio is calculated as: air usage / gas usage.

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