WO2014101785A1

WO2014101785A1 - Method and system for controlling air quantity of air box of sintering trolley

Info

Publication number: WO2014101785A1
Application number: PCT/CN2013/090513
Authority: WO
Inventors: 袁立新; 孙超; 卢杨权; 申伟杰; 高鹏双
Original assignee: 中冶长天国际工程有限责任公司
Priority date: 2012-12-27
Filing date: 2013-12-26
Publication date: 2014-07-03
Also published as: BR112015015064B1; BR112015015064A8; CN102997671B; RU2635590C2; RU2015130235A; CN102997671A

Abstract

A method and a system for controlling air quantity of an air box of a sintering trolley. A valve is disposed on each air box of the sintering trolley. The method comprises: acquiring air quantity data of a specified air box of the sintering trolley; adjusting a valve opening degree of another air box according to the air quantity data of the specified air box and a relationship between the air quantity of each air box in a database and the valve opening degree of a corresponding valve, so as to enable the air quantity of another air box to be consistent with the air quantity of the first specified air box. Because the actual air quantity in the air box is consistent with required air quantity as far as possible, and therefore, the situation is avoided that the proportion of the effective air in the air box is gradually decreased, thereby greatly decreasing air waste and more effectively saving energy sources. By means of the method, it can be ensured that the vertical sintering speed is not excessively high, and the invalid air quantity is decreased when the sintering ore quality is ensured.

Description

Method and system for controlling air volume of sintering trolley bellows This application claims to be Chinese patent filed on December 27, 2012, the application number is 201210579047.9, and the invention title is "a method and system for controlling the air volume of a sintering bellows" Priority of the application, the entire contents of which are incorporated herein by reference. Technical field

The invention relates to an energy-saving technology of a sintering system in the metallurgical field, and in particular to a method and a system for controlling the air volume of a sintering trolley. Background technique

With the rapid development of modern industry, the scale of steel production is getting larger and larger, and energy consumption is also increasing. Energy conservation and environmental protection have become important indicators of steel production. In steel production, iron-bearing ore needs to be processed by a sintering system before it enters the blast furnace. In the iron and steel metallurgy industry, before the iron ore raw material ore enters the blast furnace smelting, various powdery iron-containing raw materials need to be blended with an appropriate amount of fuel and flux, and an appropriate amount of water is added. After mixing and pelletizing, the sintering trolley is used. The material causes a series of physical and chemical changes to bond the mineral powder particles into blocks that are easy to smelt. This process is called sintering. A brief introduction to the sintering process and sintering system is given below:

The sintering system mainly includes a plurality of equipments such as a sintering trolley, a mixer, a main exhauster, a ring cooler, etc. The overall process flow is shown in Fig. 1: Various raw materials are proportioned in the batching chamber 1, and then enter the mixer 2 The mixing hook and the plucking are carried out, and then the materials are hooked on the sintering trolley 5 by the round roller feeder 3 and the nine-roller distributing machine 4, and the ignition fan 6 and the igniting fan 7 are ignited by the material, and the obtained after the sintering is completed. The sintered ore is crushed by the single-roll crusher 8 and then enters the ring-cooling machine 9 for cooling, and finally sieved and granulated and sent to the blast furnace or the finished mineral warehouse. The oxygen required for the sintering reaction is provided by the main exhaust fan 10. There are a plurality of vertical side-by-side bellows under the sintering trolley 5, and a large flue (or flue) disposed horizontally below the bellows 11 , the large flue 11 finally Connected to the main exhaust fan 10, the air volume generated by the main exhaust fan 10 reaches the trolley through the large flue 11 and each bellows to supply air to the sintering process.

During the sintering process, the material runs forward with the sintering carriage 5, and the position of the material on the sintering trolley 5 when sintering is completed is referred to as the sintering end point. It is necessary to ensure that the sintering end point does not deviate during sintering. If the sintering end point deviates due to various reasons, the traditional method is to adjust the speed of the sintering trolley to Yes: If the sintering end point is ahead, the running speed of the trolley will be accelerated; on the contrary, if the sintering end point is behind, the running speed of the trolley will be slowed down.

The above is the basic situation of the sintering process and the sintering system. The main exhaust fan 10 is a large power consumer, and in the conventional sintering process, the main exhaust fan 10 will always operate at full load, thereby causing a great waste of energy. One energy saving scheme in the prior art is: predicting the sintering end point by detecting the flue gas temperature of each bellows, and maximizing the yield by adjusting the speed of the sintering trolley to ensure the quality of the sintering, in the scheme The control of the air volume is mainly achieved by controlling the valve between the main exhaust fan and the flue, and basically also the manual adjustment process. In the process of implementing the present invention, the inventors found that the scheme only roughly controls the total air volume in the flue, and does not thoroughly study the sintering vertical velocity of the material, and does not accurately control each bellows of the sintering trolley. The amount of wind, there is still a waste of air, resulting in limited energy savings. Summary of the invention

In view of this, the object of the embodiments of the present invention is to provide a method and system for controlling the air volume of a sintering trolley bellows, and to improve the energy saving effect of the main exhaust fan by adjusting the air volume of each bellows.

In one aspect, an embodiment of the present invention provides a method for controlling a wind volume of a sintering trolley, wherein each of the bellows of the sintering trolley is provided with a valve, and the method includes:

Collecting the air volume of the designated bellows of the sintering trolley;

The valve opening of the other bellows is adjusted according to the air volume of the specified bellows and the relationship between the air volume of each bellows in the database and the valve opening degree of the corresponding valve, so that the air volume of the other bellows is consistent with the air volume of the designated bellows.

Preferably, before all the steps, the method further includes:

For each valve: During the valve opening and closing process, the air volume of the bellows where the valve is located is collected, and the relationship between the valve opening degree and the air volume is obtained and recorded in the database.

Preferably, after all the steps, the method further includes:

For each valve: During the valve opening and closing process, the air volume of the bellows where the valve is located is re-acquired, a new relationship between the valve opening and the air volume is obtained, and the database is updated.

Preferably, after all the steps, the method further comprises:

Determining whether the end point of the sintering is offset; If so, the valve opening of the first designated bellows group is adjusted to return the sintering end point to normal, wherein the first designated bellows group includes a plurality of bellows.

Preferably, after all the steps, the method further comprises:

The current large flue air volume and the current large flue effective wind rate are sampled multiple times, and the current large flue air volume and the large flue air volume preset value, the current large flue effective wind rate and the large smoke are judged after each sampling. The relationship between the preset values of the effective wind rate:

If the current large flue air volume is greater than the preset value of the large flue air volume and the current large flue effective wind rate is less than the preset value of the large flue effective wind rate, the valve in the second designated bellows group is opened in each sampling period. The degree is reduced by 2%. When the valve opening degree in the second designated bellows group is reduced by 8%, the valve opening degree in the third designated bellows group is reduced by 2% in each sampling period until the current large smoke The amount of road air reaches the preset value of the large flue air volume and the current effective flue rate of the large flue reaches the preset value of the effective flue rate of the large flue;

If the current large flue air volume is less than the preset value of the large flue air volume and the current large flue effective wind rate is greater than the preset value of the large flue effective wind rate, the valve in the third designated bellows group is opened in each sampling period. The degree is increased by 2%. When the valve opening degree in the third designated bellows group reaches 100%, the valve opening degree in the second designated bellows group is increased by 2% in each sampling period until the current large flue air volume reaches The preset value of the large flue air volume and the current effective flue rate of the large flue reaches the preset value of the effective flue rate of the large flue;

The bellows in the third designated bellows group are located before the second designated bellows group.

Preferably, after all the steps, the method further comprises:

When it is required to increase the vertical sintering speed at any of the bellows, increase the valve opening of the bellows and reduce the opening of other bellows valves;

When it is desired to reduce the vertical sintering speed at any of the bellows, the valve opening of the bellows is reduced while the other bellows valve opening is increased.

In another aspect, an embodiment of the present invention further provides a sintering trolley air box air volume control system, wherein each of the bellows of the sintering trolley is provided with a valve, and the system includes:

An air volume collecting unit, configured to collect air volume of the specified bellows of the sintering trolley;

The first valve adjusting unit adjusts the valve opening degree of the other bellows according to the air volume of the specified bellows and the relationship between the air volume of each bellows in the database and the valve opening degree of the corresponding valve, so that the air volume of the other bellows and the designated bellows The air volume is consistent.

Preferably, the system further includes: The database initializing unit is configured to: for each valve, collect air volume data of the bellows where the valve is located during the valve opening and closing process, and obtain a relationship between the valve opening degree and the air volume and record in the database.

Preferably, the system further includes:

The database updating unit is configured to: for each valve, re-acquire the air volume data of the bellows where the valve is located during the valve opening and closing process, obtain a new relationship between the valve opening degree and the air volume, and update the database.

Preferably, the system further includes:

a sintering end point judging unit for judging whether an end point of the sintering is shifted;

And a second valve adjusting unit configured to adjust a valve opening degree of the first designated bellows group to return to a normal state when the end point of the sintering is shifted, wherein the first designated bellows group includes a plurality of bellows.

Preferably, the system further includes:

The sampling and judging unit is configured to perform multiple sampling on the current large flue air volume and the current large flue effective wind rate, and determine the current large flue air volume and the large flue air volume preset value and the current large smoke after each sampling. The relationship between the effective wind rate of the road and the preset value of the effective flue rate of the large flue;

The third valve adjusting unit is configured to: if the current large flue air volume is greater than the preset value of the large flue air volume and the current large flue effective wind rate is less than the preset value of the large flue effective wind rate, then each sampling period will be The valve opening degree in the second designated bellows group is reduced by 2%, and when the valve opening degree in the second designated bellows group is decreased by 8%, the valve opening degree in the third designated bellows group is again in each sampling period. Decrease by 2% until the current large flue air volume reaches the preset value of the large flue air volume and the current large flue effective wind rate reaches the preset value of the large flue effective wind rate; if the current large flue air volume is smaller than the large flue air volume pre-predetermined If the value of the current large flue effective wind rate is greater than the preset value of the large flue effective wind rate, the valve opening degree in the third designated bellows group is increased by 2% in each sampling period, when the third designated bellows group is When the valve opening reaches 100%, the valve opening degree in the second designated bellows group is increased by 2% in each sampling period until the current large flue air volume reaches the preset value of the large flue air volume and the current large flue The effective wind rate reaches the preset value of the effective flue rate of the large flue;

Preferably, the system further includes:

The fourth valve regulating unit is used for: When it is necessary to increase the vertical sintering speed at any of the bellows, increase the valve opening of the bellows while reducing the opening of other bellows valves; when it is required to reduce the vertical sintering speed at any of the bellows, reduce the bellows Valve opening, while increasing the opening of other bellows valves.

The embodiment of the invention collects the air volume data of the designated bellows of the sintering trolley, and adjusts the valve opening degree of the other bellows according to the air volume data of the specified bellows and the relationship between the air volume of each bellows in the database and the opening degree of the corresponding bellows valve, so that each The actual air volume in the bellows is as close as possible to the required air volume, thus avoiding the situation that the proportion of effective wind in the bellows is gradually reduced, greatly reducing the waste of air volume and saving energy more effectively. It also avoids the situation where the vertical sintering speed is constantly increasing, reducing the generation of ineffective air volume and ensuring the quality of the sintered ore.

In addition, the embodiment of the invention can also adjust the valve opening degree of some bellows when the end point of the sintering occurs, which can effectively return the sintering end point to normal, so that not only the sintering end point can be corrected more accurately, but also the adjustment can be achieved. The purpose of sintering the speed of the trolley is to keep the speed of the sintering trolley constant, which is convenient for subsequent processing. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a part of the description of the invention. In the drawings: Figure 1 is a schematic view of a typical sintering system;

2 is a flow chart of a method according to an embodiment of the present invention;

3 is a flow chart of a method according to Embodiment 2 of the present invention;

4 is a flow chart of a method according to Embodiment 3 of the present invention;

Figure 5 is a schematic diagram of a system of the fourth embodiment of the present invention. detailed description

The preferred embodiments of the present invention are described in the following with reference to the accompanying drawings, and the preferred embodiments of the present invention are intended to illustrate and explain the invention.

Embodiment 1:

The material to be sintered on the sintering trolley consists of multiple layers. The wind that participates in the physical and chemical reaction of the material during sintering is called effective wind. Other winds that do not participate in the reaction are called ineffective wind. The inventors are implementing the invention During the process, it is found that as the sintering progresses, the thickness of each layer of the material will change, and the sinter layer with better gas permeability will continue to thicken, while the thickness of other layers will gradually decrease, that is, the resistance of the layer gradually increases with the sintering process. If the appropriate measures are not taken, the air volume entering the bellows will gradually increase, resulting in a gradual decrease in the proportion of effective winds, an increase in ineffective winds, and a waste of air volume, and excessive ineffective air volume will not only cause the main The consumption of electric energy will also cause heat loss. In addition, the gradual increase of the air volume of the bellows will also accelerate the vertical sintering speed, seriously affecting the quality of the sinter. Therefore, in order to better adjust the air volume, ensure that the air volume is not wasted, and effectively save energy, the basic idea of this embodiment is: Add an adjustable valve for each bellows on the sintering trolley, and adjust the opening of some bellows valves. The way to change the resistance of the material layer and the pipeline at the position of the bellows to accurately adjust the air volume of the bellows, so that the actual air volume in the bellows is as consistent as possible with the required air volume, so as to achieve the purpose of efficient use of air volume.

It should be further noted that in the prior art, the speed of the sintering trolley is controlled during sintering, that is, the speed of the sintering trolley is not constant, and in the present embodiment, the preferred speed of the sintering trolley is constant. In this way, it is simpler to collect the air volume, obtain the relationship between the air volume and the valve opening degree, reduce the complexity of the method, and be easy to implement. In addition, since the speed of the sintering trolley is constant, the sintering yield is also stabilized, which facilitates the handling of subsequent processes. The following description assumes that the speed of the sintering trolley is constant.

2 is a flow chart of a method according to an embodiment of the present invention. The method is a sintering trolley air volume control method, and each bellows of the sintering trolley is provided with a valve, and the method includes:

5201. Collect an air volume of the specified bellows of the sintering trolley. Specifically, an air volume detecting device can be provided in each of the bellows of the sintering cart. The collection may be real-time acquisition, or the windbox air volume information may be collected every other sampling period T. Of course, the premise of this step is that the current sintering end position is within the normal range, and the vertical sintering speed is also in compliance.

At the same time, there should be a standard for controlling the air volume of each bellows. In this embodiment, the air volume of the other bellows is controlled by the air volume of a specified bellows. If a 360m ² sintering machine is used as an example, 20 windboxes are used, and the total length of the sintering trolley is 90m, then the designated bellows can be selected from the middle of the bellows, for example, the twelfth bellows, that is, from the end of the ignition The twelfth bellows, because the vertical sintering speed at the position of the bellows is usually equal to or closest to the specified vertical sintering speed. However, the specific embodiment of the present invention is not limited to the specific location of the specified bellows.

5202, according to the air volume of the specified bellows, and the air volume of each bellows in the database and the corresponding valve The relationship of the valve opening degree adjusts the valve opening of the other bellows so that the air volume of the other bellows is consistent with the air volume of the designated bellows. The process of acquisition-adjustment in the above steps may be performed every other period T.

The relationship between the air volume of each bellows and the valve opening degree is preset in the database. After collecting the air volume data of the specified bellows, the database can be used to know how the air opening of the other bellows should be the same as that of the other bellows, so that the valve opening of each of the other bellows should be The valve opening degree adjusts the valve, so that the air volume of other bellows is always consistent with the air volume of the specified bellows, thereby ensuring that the air volume is not wasted, saving energy, and also making the vertical sintering speed effectively controlled.

The relationship between the amount of airflow in each of the bellows and the valve opening degree in the database can be obtained by various methods, for example, by experiment or experience, and the embodiment of the present invention does not impose any limitation. Preferably, in some embodiments of the present invention, the relationship between the valve opening and the air volume in the database can be obtained by, for example, before step S201,

For each valve: During the valve opening and closing process, the air volume of the bellows where the valve is located is collected, and the relationship between the valve opening degree and the air volume is obtained and recorded in the database. Specifically, the air volume detecting device installed in the wind box can detect the wind volume of the wind box in the production process in real time, and input the air valve opening degree and air volume information in the production process into the industrial computer as a database storage, and can also be fitted into the valve opening degree. Air flow curve with bellows.

In addition, air volume acquisition is performed in the current production state, and the production status change database will lose its meaning. At the same time, because the establishment of the database is to guide and control by detecting the data with mutual influence relationship, there is a certain inaccuracy as a basis for adjustment due to the existence of a non-linear relationship. Therefore, after the adjustment is completed, the adjusted system can be further stabilized. After the data is detected, the database obtained is more accurate and is more conducive to guiding the adjustment. Therefore, in some embodiments of the present invention, the step of updating the database may be further included, that is, after S202, the method may further include:

For each valve: During the valve opening and closing process, the air volume of the bellows where the valve is located is re-acquired, a new relationship between the valve opening and the air volume is obtained, and the database is updated. Embodiment 2

This embodiment is based on the previous embodiment and is a further extension of the previous embodiment. Base of this embodiment The idea is: If the end point of the sintering is found to be offset during the sintering process, the bellows valves can be fine-tuned, and the end point of the sintering is changed by controlling the air volume of the bellows to return the sintering end point to a reasonable position. This not only can correct the sintering end point more accurately, but also achieve the purpose of not adjusting the speed of the sintering trolley, so that the speed of the sintering trolley can be kept constant, which is convenient for the subsequent process.

FIG. 3 is a flowchart of the method according to the second embodiment of the present invention. After the step S202 of the previous embodiment, the method may further include:

5301. Determine whether the end point of the sintering is offset;

5302. If yes, adjusting the valve opening of the first designated bellows group to return the sintering end point to normal, wherein the first designated bellows group includes a plurality of bellows.

Still taking a 360m ² sintering machine as an example, the total length of the sintering trolley is 90m, and 20 bellows are used. Each bellows is given the number 1~20 according to the distance from the igniter or the nose. The coordinates of the latter bellows can be seen in the table. 1.

In this embodiment, the sintering end position is divided into five levels: front, front, normal, later, and after (the "front" refers to the current sintering end point closer to the end of the head than the ideal sintering end point, "back" exactly the opposite). In order to ensure the quality of the sintering and to effectively reduce the energy consumption, according to experience, the best position for the sintering end point is the penultimate bellows position, that is, the bellows No. 19. According to the coordinate position shown in the above table, the front end is expressed as the end point of sintering before 79m, compared with 79m~83m in the front, 85m~87m in the later, and 87m later.

In general, the judgment of the sintering end point is mainly obtained by detecting the temperature of each bellows. According to the sintering design manual, the position of the material on the trolley is defined as the sintering end point when the material temperature is about 350 degrees. Therefore, the sintering end point control is equivalent to controlling the position of the sintered material within the set position range when the material detection temperature is 350 degrees.

As an example, the specific adjustment strategy for adjusting the valve opening of the first designated bellows group can be as follows:

If the end point of the sintering is detected to be shifted backward, the air volume entering the trolley is reduced, the vertical speed of the sintering is reduced, and the valve opening is increased to increase the air volume. Can be offset from the end of the sintering end point, The valve of the last bellows begins to select a different number of bellows to form the first designated bellows group, as shown in the table below, and the adjustment can be performed with the same amplitude or different amplitude for each relevant valve.

Table 2

Similarly, if the end of the sintering end is detected to be offset, it means that the air volume entering the trolley is too much, the vertical speed of the sintering is too fast, and the valve opening is required to reduce the air volume. Embodiment 3

4 is a flow chart of a method according to a third embodiment of the present invention. The method is based on the first embodiment and is a further extension based on the first embodiment. Specifically, in order to further reduce the ineffective air volume to achieve a better energy saving effect, after the embodiment-series bellows valve adjusting step, the following steps may be further performed: S401, the current large flue air volume and the current large flue effective wind The rate is sampled multiple times, and after each sampling, the current relationship between the current large flue air volume and the large flue air volume preset value, the current large flue effective wind rate and the large flue effective wind rate preset value are determined.

For example, an air volume collecting device can be provided in the large flue to collect the large flue air volume. For another example, a flue gas analyzer can be installed in the large flue to detect the gas components in the flue gas, and then compared with the gas components of the ordinary air to obtain an effective wind ratio. For the specific sampling of the current large flue air volume and the current large flue effective wind rate, the embodiment of the present invention is not limited.

5402. If the current large flue air volume is greater than a preset value of the large flue air volume and the current large flue effective wind rate d is a preset value of the large flue effective wind rate, the second designated bellows group is selected in each sampling period. The valve opening is reduced by 2%. When the valve opening in the second designated bellows group is reduced by 8%, the valve opening in the third designated bellows group is reduced by 2% in each sampling period. Until the current large flue air volume reaches the preset value of the large flue air volume and the current large flue effective wind rate reaches the preset value of the large flue effective wind rate.

For example, you can select the 17th and 18th bellows, the valve opening is reduced by 2% in each sampling period T, when the valve is lowered by 8%, then the front two bellows (15, 16) are adjusted again, each time lowering The opening is still 2% until the control requirements are met.

5403. If the current large flue air volume is less than the preset value of the large flue air volume and the current large flue effective wind rate is large In the large flue effective wind rate preset value, the valve opening degree in the third designated bellows group is increased by 2% in each sampling period, and when the valve opening degree in the third designated bellows group reaches 100%, The valve opening degree in the second designated bellows group is increased by 2% in each sampling period until the current large flue air volume reaches the preset value of the large flue air volume and the current large flue effective air rate reaches the large flue effective air rate. default value.

For example, the 15th and 16th bellows can be selected first, and the valve opening degree is increased by 2% in each sampling period T. When the valve opening degree is adjusted to 100%, the valve opening degree is fixed, and then the rear two bellows are adjusted (17. 18), the opening is increased by 2% each time until the control requirements are met.

The bellows in the third designated bellows group are located before the second designated bellows group. For the specific selection of the windboxes, the second and third designated bellows groups may be determined according to the site conditions, and the embodiments of the present invention are not limited. Embodiment 4

Figure 5 is a schematic diagram of a system of the fourth embodiment of the present invention. The system is based on the above method embodiment, and is a sintering trolley bellows air volume control system. Each of the bellows of the sintering trolley is provided with a valve, and the system includes:

The air volume collecting unit 501 is configured to collect the air volume of the designated bellows of the sintering trolley;

The first valve adjusting unit 502 adjusts the valve opening degree of the other bellows according to the air volume of the specified bellows and the relationship between the air volume of each bellows in the database and the valve opening degree of the corresponding valve, so that the air volume of the other bellows and the designation The air volume of the bellows is the same.

Preferably, the system further includes:

The database initializing unit is configured to: for each valve, collect air volume data of the bellows where the valve is located during the valve opening and closing process, obtain a relationship between the valve opening degree and the air volume, and record in the database.

Preferably, the system further includes:

a sintering end point judging unit for judging whether an end point of the sintering is shifted; And a second valve adjusting unit, configured to adjust a valve opening degree of the first designated windbox group to return to a normal state when the sintering end point is offset, wherein the first designated bellows group includes a plurality of wind boxes.

Preferably, the system further includes:

The fourth valve regulating unit is used for:

When it is necessary to increase the vertical sintering speed at any of the bellows, increase the valve opening of the bellows while reducing the opening of other bellows valves; when it is required to reduce the vertical sintering speed at any of the bellows, reduce the bellows Valve opening, while increasing the opening of other bellows valves.

It should be noted that the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it is still possible for those skilled in the art to The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

1. A method for controlling the air volume of the bellows of a sintering trolley, characterized in that each bellows of the sintering trolley is provided with a valve. The method includes:

Collect the air volume of the designated air box of the sintering trolley;

According to the air volume of the designated air box and the relationship between the air volume of each air box and the valve opening of the corresponding valve in the database, the valve openings of other air boxes are adjusted so that the air volume of other air boxes is consistent with the air volume of the designated air box.

2. The method according to claim 1, characterized in that, before all steps, it further includes: for each valve: during the opening and closing process of the valve, collect the air volume of the air box where the valve is located, and obtain the relationship between the valve opening and the air volume. relationship and recorded in the database.

3. The method according to claim 2, characterized in that, after all steps, it further includes: for each valve: during the opening and closing process of the valve, re-collect the air volume of the air box where the valve is located, and obtain the valve opening and air volume. the new relationship and updates the database.

4. The method according to claim 1, characterized in that, after all steps, it further includes: determining whether the sintering end point has shifted;

If so, adjust the valve opening of the first designated bellows group to return the sintering endpoint to normal, where the first designated bellows group includes multiple bellows.

5. The method according to claim 1, characterized in that, after all steps, it further includes: sampling the current large flue air volume and the current large flue effective air rate multiple times, and judging the current large smoke after each sampling. The relationship between the duct air volume and the preset value of the large flue air volume, the current effective air rate of the large flue and the preset value of the effective air rate of the large flue:

If the current air volume of the large flue is greater than the preset value of the large flue air volume and the current effective air rate of the large flue is less than the preset value of the effective air rate of the large flue, the valve in the second designated air box group will be opened during each sampling period. The degree is reduced by 2%. When the valve opening in the second designated air box group is reduced by 8%, the valve opening in the third designated air box group is reduced by 2% in each sampling period until the current smoke The duct air volume reaches the preset value of the large flue air volume and the current effective air rate of the large flue reaches the preset value of the large flue effective air rate;

If the current air volume of the large flue is less than the preset value of the large flue air volume and the current effective air rate of the large flue is greater than the preset value of the effective air rate of the large flue, the valve in the third designated air box group will be opened during each sampling period. The degree increases by 2%. When the valve opening in the third designated air box group reaches 100%, then in each sampling period Increase the valve opening in the second designated air box group by 2% until the current large flue air volume reaches the large flue air volume preset value and the current large flue effective air rate reaches the large flue effective air rate preset value;

The wind boxes in the third designated wind box group are all located in front of the second designated wind box group.

6. The method according to claim 1, characterized in that, after all steps, it further includes: when it is necessary to increase the vertical sintering speed at any wind box, increase the valve opening of the wind box, and simultaneously reduce the valve opening of other wind boxes. Spend;

When it is necessary to reduce the vertical sintering speed at any air box, reduce the valve opening of the air box and increase the valve opening of other air boxes at the same time.

7. An air volume control system for the wind box of a sintering trolley, characterized in that each wind box of the sintering trolley is provided with a valve. The system includes:

An air volume collection unit is used to collect the air volume of the designated air box of the sintering trolley;

The first valve adjustment unit adjusts the valve openings of other air boxes according to the air volume of the designated air box and the relationship between the air volume of each air box and the valve opening of the corresponding valve in the database, so that the air volume of the other air boxes is consistent with the designated air box. The air volume is consistent.

8. The system according to claim 7, characterized in that the system further includes: a database initialization unit, configured to: for each valve, during the valve opening and closing process, collect the air volume data of the air box where the valve is located, The relationship between valve opening and air volume is obtained and recorded in the database.

9. The system according to claim 8, characterized in that the system further includes: a database update unit, configured to: for each valve, during the valve opening and closing process, re-collect the air volume data of the air box where the valve is located , obtain the new relationship between valve opening and air volume and update the database.

10. The system according to claim 7, characterized in that the system further includes: a sintering end point judgment unit, used to judge whether the sintering end point has shifted;

The second valve adjustment unit is used to adjust the valve opening of the first designated bellows group to return the sintering endpoint to normal when the sintering end point deviates, where the first designated bellows group includes multiple bellows.

11. The system according to claim 7, characterized in that, the system further includes: The sampling and judgment unit is used to sample the current large flue air volume and the current large flue effective air rate multiple times, and determine the current large flue air volume, the preset value of the large flue air volume, and the current large flue air volume after each sampling. The relationship between the effective air rate of the duct and the preset value of the effective air rate of the large flue;

The third valve adjustment unit is used for: If the current air volume of the large flue is greater than the preset value of the large flue air volume and the current effective air rate of the large flue is less than the preset value of the effective air rate of the large flue, then in each sampling cycle The valve opening in the second designated air box group is reduced by 2%. When the valve opening in the second designated air box group is reduced by 8%, the valve opening in the third designated air box group is reduced in each sampling period. Decrease by 2% until the current large flue air volume reaches the large flue air volume preset value and the current large flue effective air rate reaches the large flue effective air rate preset value; if the current large flue air volume is less than the large flue air volume preset value If the current effective air rate of the large flue is greater than the preset value of the effective air rate of the large flue, the valve opening in the third designated air box group will be increased by 2% in each sampling period. When the valve opening reaches 100%, the valve opening in the second designated air box group will be increased by 2% in each sampling period until the current large flue air volume reaches the large flue air volume preset value and the current large flue air volume The effective air rate reaches the preset value of the effective air rate of the large flue;

12. The system according to claim 7, characterized in that the system further includes: a fourth valve adjustment unit, used for:

When it is necessary to increase the vertical sintering speed at any air box, increase the valve opening of the air box and reduce the valve openings of other air boxes; when it is necessary to reduce the vertical sintering speed at any air box, decrease the opening of the air box. valve opening, and simultaneously increase the opening of other bellows valves.