Self-adaptive adjusting coupling injection device of sintering machine and injection method of self-adaptive adjusting coupling injection device

Abstract

The invention discloses a self-adaptive adjustment sintering machine coupling injection device and an injection method thereof. The self-adaptive adjustment sintering machine coupling injection device comprises a sintering machine trolley, an injection cover, a coke oven gas injection mechanism and a steam injection mechanism. The coke oven gas injection mechanism comprises a coke oven gas injection header pipe, coke oven gas injection branch pipes and coke oven gas injection pipe rows; the steam injection mechanism comprises a steam injection header pipe, a steam injection branch pipe and a steam injection pipe row; the sintering machine trolley is located in the injection cover, and the coke oven gas injection pipe row and the steam injection pipe row are arranged in the injection cover above the sintering machine trolley; and each blowing pipe row is provided with blowing holes. According to the invention, the coke oven gas, the steam, the area length of the coke oven gas and steam coupling injection section and the injection strength can be adaptively controlled and adjusted in different amplitudes in real time according to the total amount of the sintering mixture and the change of the position of the sintering end point; the coupling blowing auxiliary sintering function is reasonably matched with the actual process condition of the sintering process.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering, in particular to a self-adaptive sintering machine coupled blowing device and a blowing method thereof. Background Art

[0002] The sintering process is a key step in the ironmaking process. It involves mixing various powdered iron-containing raw materials with appropriate amounts of fuel and flux, adding an appropriate amount of water, and then subjecting them to mixing and pelletizing. The materials then undergo a series of physical and chemical changes on the sintering equipment, forming agglomerates that are then sent to the blast furnace for the next step. To reduce the coke ratio and smelting costs of blast furnace ironmaking, blast furnace sintering often requires high strength and high reducibility. The sintering process generally requires high strength, high yield, low return rate, and low fuel consumption. High-strength and high-reducibility sintered ore consumes less coke during blast furnace smelting, thereby reducing CO2 emissions. From a long-term perspective, CO2 emission reduction requirements will become a bottleneck restricting the development of the steel industry. According to relevant data, sintering and blast furnace processes account for approximately 60% of total industrial CO2 emissions. Therefore, reducing the proportion of solid fuel consumed in sintering and lowering the fuel ratio of blast furnace charge materials are urgent ironmaking technology needs, both for cost reduction and environmental protection.

[0003] The principle of gas injection technology is to inject a combustible gas onto the sintering charge surface. Under the negative pressure of the exhaust air, the combustible gas is drawn into the charge layer for combustion and heat generation. This replenishes heat in the heat-deficient upper charge layer, optimizes the temperature field in the upper charge layer, and solves the problem of uneven heat distribution in the charge layer. In 2009, Japan's JFE Group implemented natural gas injection on the sintering charge surface for industrial use, reducing fuel consumption by 3kg per ton of sintered ore and reducing CO emissions by 260,000 tons per year. Subsequently, Meishan Iron and Steel Corporation implemented coke oven gas injection on sintering machines, also achieving industrial production and reducing fuel consumption by 7.3%.

[0004] In terms of controlling high-temperature combustion atmospheres, Nippon Steel Corporation was the first to conduct research on injecting steam onto the sintering charge surface, using water vapor to promote fuel combustion. India's BSP, as well as China's Shagang and Shougang, have also conducted industrial trials and production practices using steam injection. In 2016, Shougang Jingtang applied steam injection, reducing solid fuel consumption by 1.64 kg / t and suppressing dioxin formation. Researchers at Central South University studied the effects of coupled gas and water vapor injection on sintering. The results showed that under optimal gas and water vapor injection regimes, sintering performance improved compared to either injection alone, demonstrating a synergistic effect of coupled injection. Under optimal gas injection conditions, implementing variable-intensity stepwise water vapor injection yielded even better sintering performance, reducing solid fuel consumption by approximately 7 kg (standard coal) per ton of sintered ore, reducing NOx emissions by approximately 16%, and reducing CO emissions by approximately 20%.

[0005] After searching, Patent No. CN 113969348 A discloses a starting section blowing method for a sintering machine blowing process, Patent No. CN 108120294 A discloses a sintering machine blowing device capable of adaptively adjusting the blowing starting point, and Patent No. CN 113969346 A discloses a gas-steam coupled sintering machine. In the above patents, the area of gas-steam coupled blowing is relatively fixed, or the starting point position is only adjusted from the perspective of blowing safety. At the same time, the adjustment of the blowing amount is relatively simple, and fails to form an effective coupling with the actual process state of sintering (change in the sintering end position). Therefore, the effects of reducing carbon, improving quality, and strengthening sintering are slightly insufficient. In summary, the structure of the blowing device under the existing technology is as follows: the blowing device consists of a blowing main pipe, a blowing branch pipe, a blowing pipe row, a gas blowing hole, a blowing hood and a side seal. One end of the main injection pipe is connected to the plant's gas pipeline, and the other end is connected to the injection pipe bank via injection branches. The injection pipe bank is located inside the injection hood, above the sintering machine trolley. During production, gas or steam enters the main injection pipe from the plant's pipeline, then flows into the injection branches, and finally into the injection pipe bank. It is then ejected through the injection holes provided on the bank. Inside the injection hood, it mixes and dilutes with air to form a mixed gas of the required design concentration. This gas then enters the sintering bed to assist in sintering. Side seals effectively prevent the gas and mixed gas inside the hood from escaping. The gas injection device under the existing technology has the following defects in production because it cannot adaptively adjust the injection end point position: during normal production of the sintering machine, the sintering end point position often moves forward or lags due to fluctuations in operating parameters such as moisture in the material, material particle size, ignition intensity, large flue negative pressure, and material layer thickness. If the gas and steam are coupled and injected according to the original designed fixed position and fixed flow rate, the effect of the coupled injection for auxiliary sintering will be affected, and the effectiveness of the heat equalization and enhanced sintering process will be significantly reduced. Summary of the Invention

[0006] The object of the present invention is to provide a self-adaptive sintering machine coupled blowing device and its blowing method, which can realize real-time adaptive control and adjustment of the coke oven gas, steam, and the regional length of the coke oven gas and steam coupled blowing section and the blowing intensity at different amplitudes according to the changes in the total amount of sintering mixture and the sintering end point position, so as to realize the reasonable matching of the coupled blowing auxiliary sintering function with the actual progress of the sintering process, thereby overcoming the shortcomings of the existing coke oven gas and steam sintering coupled blowing technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A self-adaptive sintering machine coupled blowing device comprises a sintering machine trolley, a blowing hood, a coke oven gas blowing mechanism and a steam blowing mechanism; the coke oven gas blowing mechanism comprises a coke oven gas blowing main pipe, a coke oven gas blowing branch pipe and a coke oven gas blowing pipe bank; the steam blowing mechanism comprises a steam blowing main pipe, a steam blowing branch pipe and a steam blowing pipe bank; the sintering machine trolley is located in the blowing hood, and the coke oven gas blowing main pipe and the steam blowing main pipe are arranged on the sintering machine trolley. The outside of the blowing hood; the coke oven gas blowing pipe row and the steam blowing pipe row are arranged in the blowing hood above the sintering machine trolley; one end of the coke oven gas blowing branch pipe is connected to the coke oven gas blowing main pipe, and the other end is connected to the coke oven gas blowing pipe row, and 6-20 blowing holes are set on each coke oven gas blowing pipe row; one end of the steam blowing branch pipe is connected to the steam blowing main pipe, and the other end is connected to the steam blowing pipe row, and 6-20 blowing holes are set on each steam blowing pipe row.

[0009] Furthermore, the injection area of the coke oven gas injection mechanism is set at a safe distance of one wind box length behind the ignition and holding furnace, and the injection coverage area is the effective length L of the sintering machine. 有效 The area covered by the steam injection mechanism is within the range of 16.67%-56.67% of the effective length L of the sintering machine. 有效 The area covered by the coke oven gas and steam coupling injection section is the effective length L of the sintering machine. 有效 The range is 34.44%-56.67%.

[0010] Furthermore, the coke oven gas injection main pipe is provided with a coke oven gas injection main pipe flow meter, a coke oven gas injection main pipe flow regulating valve and a coke oven gas injection main pipe electric shut-off valve; the coke oven gas injection branch pipe is provided with a coke oven gas injection branch pipe flow meter, a coke oven gas injection branch pipe flow regulating valve and a coke oven gas injection branch pipe electric shut-off valve; the steam injection branch pipe is provided with a steam injection branch pipe flow meter, a steam injection branch pipe flow regulating valve and a steam injection branch pipe electric shut-off valve.

[0011] Furthermore, the coke oven gas injection branch pipes and the steam injection branch pipes are arranged in 1-3 rows at equal intervals of 4 meters along the length direction of the sintering machine.

[0012] Furthermore, a plurality of bellows are provided under the sintering machine trolley, and each bellows under the sintering machine trolley is provided with a bellows temperature measuring device, and the sintering machine is equipped with a control system for controlling the bellows temperature measuring device to monitor the temperature value of each bellows in real time and to form a bellows temperature curve according to the temperature value of each bellows measured by the bellows temperature measuring device, and to set the sintering end point position on the bellows temperature curve and the sintering mixture amount Q 混合料料量 To reasonably adjust and automatically control the position range and injection amount of coke oven gas and steam.

[0013] The present invention provides another technical solution: a blowing method of a sintering machine coupled blowing device with adaptive adjustment, comprising the following steps:

[0014] S1: The spatial distance values of the coke oven gas injection branch pipes and steam injection branch pipes in the corresponding sintering machine length direction are used as labels to control the system to effectively identify the first to last row of branch pipes;

[0015] S2: Set the total amount of coke oven gas injection control ratio J b The coke oven gas flow rate required for each ton of sintering mixture is in the range of 1.2-3.2m 3 / t;

[0016] S3: Set the steam injection total amount control ratio Z b The steam injection flow rate required for each ton of sintering mixture is in the range of 2.0-3.0m 3 / t;

[0017] S4: Set the total amount of coke oven gas and steam injection to the total amount of sintering mixture Q 混合料料量 Carry out interlock control, that is, the total amount of coke oven gas injection is controlled by Q 混合料料量 ×J b Automatic control is carried out, and the total amount of steam injection is controlled by Q 混合料料量 ×Z b Perform automatic control;

[0018] S5: The control system monitors the temperature of each wind box in real time through the wind box temperature measuring device, and compiles the wind box temperature curve according to the temperature values of each wind box measured by the wind box temperature measuring device, and obtains the current sintering end position value L, that is, the length value of the current sintering end position from the starting sintering wind box;

[0019] S6: The control system compares the current sintering end position value L with the normal sintering end position control target value L0 to realize the control and adjustment of the coke oven gas injection and steam injection area and the flow of each injection branch pipe. Among them, the coke oven gas is adjusted according to the flow of all branches within the control area at 3-7m / s for every 4m. 3 / hThe total amount of injection is automatically distributed and adjusted with different decreasing amplitudes; the total amount of steam injection is automatically evenly adjusted according to the corresponding branches within the control area.

[0020] Furthermore, in S6, when |L-L0|≤2m, it indicates that the sintering end position control is within the normal process control range. Then, the control system controls the area covered by the coke oven gas injection to be within the ideal range of 16.67%-52.22% of the effective length of the sintering machine, the system controls the area covered by the steam injection to be within the ideal range of 38.89%-61.11% of the effective length of the sintering machine, and the area covered by the coke oven gas and steam coupling injection section to be within the ideal range of 38.89%-52.22% of the effective length of the sintering machine. The coke oven gas flow rate of all branches within the control area corresponding to every 4m is 5m 3 The total amount of steam injection is automatically distributed and adjusted according to the decreasing amplitude of / h; the total amount of steam injection is automatically evenly adjusted according to the corresponding branches within the control area.

[0021] Furthermore, in S6, when L0-L>2m, it indicates that the current sintering end position is advanced. At this time, the control system calculates the coke oven gas injection end position, specifically according to the following formula:

[0022]

[0023] Where: L 有效 is the total effective exhaust length of the sintering machine, m; L is the real-time sintering end position, m; L0 is the control target value of the sintering end position, m;

[0024] At this time, the coke oven gas injection area is controlled to be L 有效 The injection branch pipes within the range of ×16.67%-L1 are used for injection, and the coke oven gas branch pipes outside this area are automatically cut off, and the flow rate of all branch pipes within the control area is set at 7m per 4m. 3 The total amount of spraying is automatically distributed and adjusted by the decreasing amplitude of / h;

[0025] At this time, the steam injection starting point position L2 is calculated according to the following formula:

[0026]

[0027] The steam injection end point position L3 is calculated according to the following formula:

[0028]

[0029] At this time, the steam injection area is the L2-L3 injection branch pipe for injection, and the steam injection branch pipes outside this area are automatically cut off, and the flow rate of each steam injection branch pipe is automatically distributed and adjusted according to the total injection amount.

[0030] Furthermore, in S6, when L-L0>2m, it indicates that the current sintering end position is lagging. At this time, the control system calculates the coke oven gas injection end position according to formula 1. At this time, the coke oven gas injection area is controlled to be L 有效 The injection branch pipes within the range of ×16.67%-L1 are used for injection, and the coke oven gas branch pipes outside this area are automatically cut off, and the flow rate of all branch pipes within the control area is set at 3m3 for every 4m. 3 The total amount of spraying is automatically distributed and adjusted by the decreasing amplitude of / h;

[0031] At this time, the starting and ending positions of the steam injection are also calculated according to Formula 2 and Formula 3, and the injection area is controlled and adjusted, and the flow rate of each steam injection branch pipe in the above area is automatically distributed and adjusted according to the total injection amount.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The adaptively adjustable sintering machine coupled blowing device and its blowing method of the present invention adopt the real-time position linkage control technology with the sintering end point to adaptively and automatically adjust and control the regional lengths of coke oven gas, steam, and coke oven gas and steam coupled blowing sections. At the same time, according to the amount of sintering mixture and the changes in the blowing interval, the blowing intensity in each interval is automatically optimized and adjusted in gradients, so that the coupled blowing auxiliary sintering function is realized and the sintering process is efficiently consistent, overcoming the shortcomings of the existing coke oven gas and steam sintering coupled blowing technology, and further improving the actual effect of coke oven gas and steam coupled injection on improving sintering quality and reducing carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front view of the blowing device of the present invention;

[0035] Figure 2 It is a side view of the blowing device of the present invention;

[0036] Figure 3 Schematic diagram of the sintering endpoint position curve in an embodiment of the present invention.

[0037] In the figure: 1. Coke oven gas injection main pipe; 2. Steam injection main pipe; 3. Coke oven gas injection branch pipe; 4. Steam injection branch pipe; 5. Coke oven gas injection pipe bank; 6. Steam injection pipe bank; 7. Flow meter for coke oven gas injection main pipe; 8. Flow regulating valve for coke oven gas injection main pipe; 9. Electric shut-off valve for coke oven gas injection main pipe; 10. Flow meter for coke oven gas injection branch pipe; 11. Flow regulating valve for coke oven gas injection branch pipe; 12. Electric shut-off valve for coke oven gas injection branch pipe; 13. Flow meter for steam injection branch pipe; 14. Flow regulating valve for steam injection branch pipe; 15. Electric shut-off valve for steam injection branch pipe. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0039] See also Figure 1-2 In an embodiment of the present invention, a self-adaptive coupled injection device for a sintering machine is provided, comprising a sintering machine trolley, an injection hood, a coke oven gas injection mechanism, and a steam injection mechanism; the coke oven gas injection mechanism comprises a coke oven gas injection main pipe 1, a coke oven gas injection branch pipe 3, and a coke oven gas injection pipe row 5; the steam injection mechanism comprises a steam injection main pipe 2, a steam injection branch pipe 4, and a steam injection pipe row 6; the sintering machine trolley is located in the injection hood, and the coke oven gas injection main pipe 1 and the steam injection main pipe 2 are connected to the sintering machine trolley. It is arranged on the outside of the injection hood; the coke oven gas injection pipe row 5 and the steam injection pipe row 6 are arranged in the injection hood above the sintering machine trolley; one end of the coke oven gas injection branch pipe 3 is connected to the coke oven gas injection main pipe 1, and the other end is connected to the coke oven gas injection pipe row 5, and each coke oven gas injection pipe row 5 is provided with 6-20 injection holes; one end of the steam injection branch pipe 4 is connected to the steam injection main pipe 2, and the other end is connected to the steam injection pipe row 6, and each steam injection pipe row 6 is provided with 6-20 injection holes. The coke oven gas injection main pipe 1 is equipped with a coke oven gas injection main pipe flowmeter 7, a coke oven gas injection main pipe flow regulating valve 8, and a coke oven gas injection main pipe electric shut-off valve 9. The coke oven gas injection branch pipe 3 is equipped with a coke oven gas injection branch pipe flowmeter 10, a coke oven gas injection branch pipe flow regulating valve 11, and a coke oven gas injection branch pipe electric shut-off valve 12. The steam injection branch pipe 4 is equipped with a steam injection branch pipe flowmeter 13, a steam injection branch pipe flow regulating valve 14, and a steam injection branch pipe electric shut-off valve 15. The coke oven gas injection branch pipe 3 and the steam injection branch pipe 4 are arranged in 1-3 rows at equal intervals of 4 meters along the length of the sintering machine.

[0040] In the above embodiment, the injection area of the coke oven gas injection mechanism is generally set to be located at a safe distance of one wind box length behind the ignition and holding furnace, and the area that can be covered by the injection is the effective length L of the sintering machine. 有效 The area covered by steam injection is within the range of 16.67%-56.67% (from the head to the tail) of the sintering machine, and the area covered by steam injection is the effective length L of the sintering machine. 有效 The area covered by the coke oven gas and steam coupling injection section is the effective length L of the sintering machine. 有效 The range is 34.44%-56.67% (from head to tail).

[0041] In the embodiment of the present invention, a plurality of bellows are provided under the existing sintering machine trolley, and each bellows under the sintering machine trolley is provided with a bellows temperature measuring device, and the sintering machine is equipped with a control system for controlling the bellows temperature measuring device to monitor the temperature value of each bellows in real time and to organize the temperature values of each bellows measured by the bellows temperature measuring device into a bellows temperature curve, and to set the sintering end point position on the bellows temperature curve and the sintering mixture amount Q according to the sintering end point position on the bellows temperature curve and the sintering mixture amount Q. 混合料料量 To reasonably adjust and automatically control the position range and injection amount of coke oven gas and steam, such as Figure 3 shown.

[0042] In order to further better explain the above embodiment, the present invention also provides a blowing method of a sintering machine coupled blowing device with adaptive adjustment, comprising the following steps:

[0043] S1: The spatial distance values of the coke oven gas injection branch pipes 3 and steam injection branch pipes 4 in the corresponding sintering machine length direction are used as labels to control the effective identification of the first to last row of branch pipes by the control system;

[0044] S2: Set the total amount of coke oven gas injection control ratio J b The coke oven gas flow rate required for each ton of sintering mixture is in the range of 1.2-3.2m 3 / t;

[0045] S3: Set the steam injection total amount control ratio Z b The steam injection flow rate required for each ton of sintering mixture is in the range of 2.0-3.0m 3 / t;

[0046] S4: Set the total amount of coke oven gas and steam injection to the total amount of sintering mixture Q 混合料料量 Carry out interlock control, that is, the total amount of coke oven gas injection is controlled by Q 混合料料量 ×J b Automatic control is carried out, and the total amount of steam injection is controlled by Q 混合料料量 ×Z bPerform automatic control;

[0047] S5: The control system monitors the temperature of each wind box in real time through the wind box temperature measuring device, and compiles the wind box temperature curve according to the temperature values of each wind box measured by the wind box temperature measuring device, and obtains the current sintering end position value L, that is, the length value of the current sintering end position from the starting sintering wind box;

[0048] S6: The control system compares the current sintering end position value L with the normal sintering end position control target value L0 to realize the control and adjustment of the coke oven gas injection and steam injection area and the flow of each injection branch pipe. Among them, the coke oven gas is adjusted according to the flow of all branches within the control area at 3-7m / s for every 4m. 3 / hThe total amount of injection is automatically distributed and adjusted with different decreasing amplitudes; the total amount of steam injection is automatically evenly adjusted according to the corresponding branches within the control area.

[0049] Specifically, when |L-L0|≤2m, it indicates that the sintering end point position control is within the normal process control range. The control system controls the area covered by the coke oven gas injection to be within the ideal range of 16.67%-52.22% (from the head to the tail) of the effective length of the sintering machine, and the system controls the area covered by the steam injection to be within the ideal range of 38.89%-61.11% (from the head to the tail) of the effective length of the sintering machine. The area covered by the coke oven gas and steam coupling injection section is within the ideal range of 38.89%-52.22% (from the head to the tail) of the effective length of the sintering machine. The coke oven gas flow rate of all branches within the control area corresponding to every 4m is 5m 3 The total amount of steam injection is automatically distributed and adjusted according to the decreasing amplitude of / h; the total amount of steam injection is automatically evenly adjusted according to the corresponding branches within the control area.

[0050] Furthermore, when L0-L>2m, it indicates that the current sintering end position is advanced. At this time, the control system calculates the coke oven gas injection end position, specifically according to the following formula:

[0051]

[0052] Where: L 有效 is the total effective exhaust length of the sintering machine, m; L is the real-time sintering end position, m; L0 is the control target value of the sintering end position, m;

[0053] At this time, the coke oven gas injection area is controlled to be L 有效 The injection branch pipes within the range of ×16.67%-L1 are used for injection, and the coke oven gas branch pipes outside this area are automatically cut off, and the flow rate of all branch pipes within the control area is set at 7m per 4m. 3The total amount of spraying is automatically distributed and adjusted by the decreasing amplitude of / h;

[0054] At this time, the steam injection starting point position L2 is calculated according to the following formula:

[0055]

[0056] The steam injection end point position L3 is calculated according to the following formula:

[0057]

[0058] At this time, the steam injection area is the L2-L3 injection branch pipe for injection, and the steam injection branch pipes outside this area are automatically cut off, and the flow rate of each steam injection branch pipe is automatically distributed and adjusted according to the total injection amount.

[0059] Through the above control, the ideal coupling effect of coke oven gas and steam injection is achieved under the condition that the sintering end point is advanced.

[0060] Furthermore, when L-L0>2m, it indicates that the current sintering end position is lagging. At this time, the control system calculates the coke oven gas injection end position according to formula 1. At this time, the coke oven gas injection area is controlled to be L 有效 The injection branch pipes within the range of ×16.67%-L1 are used for injection, and the coke oven gas branch pipes outside this area are automatically cut off, and the flow rate of all branch pipes within the control area is set at 3m3 for every 4m. 3 / h is used to automatically distribute and adjust the total amount of injection; at this time, the starting and ending positions of steam injection are also calculated according to Formula 2 and Formula 3, and the injection area is controlled and adjusted, and the flow rate of each steam injection branch pipe in the above-mentioned area is automatically distributed and adjusted according to the total amount of injection.

[0061] Through the above control, it is possible to achieve an ideal coupling effect of coke oven gas and steam injection under the condition of delayed sintering endpoint.

[0062] In order to further better explain the embodiments of the present invention, the following specific implementation cases are provided for illustration:

[0063] A 360m 2The sintering machine has a total of 24 wind boxes, with each of the 1-6# wind boxes being 3m long and the 7#-24# wind boxes being 4m long. The effective exhaust length of the sintering machine is 90m. The composite injection device is located above the sintering machine in an area ranging from 15m to 59m along the machine's length, representing 16.67% to 65.56% of the effective length. The coke oven gas injection branch pipes are arranged from 16.67% to 56.67% of the machine's length, with rows of these branches spaced every 2m. The first row is located at 17m along the machine's length, with subsequent rows installed every 2m until 51m, for a total of 18 rows. The steam injection branch pipes are arranged in a range of 31.44%-65.56% in the length direction, and a row of steam injection branch pipes is set at every 2m. The first row of steam injection branch pipes is set at 33m in the length direction of the sintering machine, and then a row of injection branch pipes is set every 2m until 59m, with a total of 14 rows of steam injection branch pipes.

[0064] If the total amount of sintering mixture Q 混合料料量 Set to 700t / h, the sintering end position control target value L0 is 82m, the total amount of coke oven gas injection control ratio J b 2.0m 3 / t, steam injection total amount control ratio Z b 2.5m 3 / t. If the current sintering end point is between 80-84m, the coke oven gas injection area is automatically controlled within the range of 15m-47m (i.e., the range of 16.67%-52.22% of the effective length), and the corresponding 1-16 rows of injection branches are controlled to inject, with a total injection volume of 700t / h×2.0m 3 / t=1400m 3 / h, and the branch flow rate corresponding to every 4m is 5m 3 / h decreasing injection, the flow rate of the 1st and 2nd row coke oven gas injection branch pipes is 96.25m 3 / h, the flow rate of the 15th and 16th rows of coke oven gas injection branch pipes is 78.75m 3 / h. The steam injection area is automatically controlled within the range of 35m-55m (i.e. 38.89%-61.11% of the effective length), and the corresponding 3rd to 12th rows of injection branches are controlled to inject, with a total injection volume of 700t / h×2.5m 3 / t=1750m 3 / h, the flow rate of each steam injection branch pipe is 175m 3 / h.

[0065] If the actual position of the current sintering end point is 74m (the sintering end point position is advanced), the coke oven gas injection area is automatically controlled within the range of 15m-42.41m (i.e., the range of 16.67%-47.12% of the effective length) according to Formula 1, and the corresponding 1-14 rows of injection branches are controlled to be injected, and the total injection amount is 1400m 3 / h, and the branch flow rate corresponding to every 4m is 7m 3 / h decreasing injection, the flow rate of the 1st and 2nd row coke oven gas injection branch pipes is 110.5m 3 / h, the flow rate of the 13th and 14th rows of coke oven gas injection branch pipes is 89.50m 3 / h. The steam injection area is automatically controlled within the range of 31.58m-49.63m (i.e., 35.09%-55.14% of the effective length) according to formulas 2 and 3. The corresponding 1-9 rows of injection branches are controlled to inject, and the total injection volume is 1750m 3 / h, the flow rate of each steam injection branch pipe is 194.4m 3 / h.

[0066] If the actual position of the current sintering end point is 88m (the sintering end point position is lagging), the coke oven gas injection area is automatically controlled within the range of 15m-50.44m (i.e., the range of 16.67%-56.04% of the effective length) according to Formula 1, and the corresponding 1-18 rows of injection branches are controlled to be injected, with a total injection volume of 1400m 3 / h, and the branch flow rate corresponding to every 4m is 3m 3 / h decreasing injection, the flow rate of the 1st and 2nd row coke oven gas injection branch pipes is 83.75m 3 / h, the flow rate of the 17th and 18th rows of coke oven gas injection branch pipes is 72.75m 3 / h. The steam injection area is automatically controlled within the range of 37.56m-59.02m (i.e., 41.73%-65.58% of the effective length) according to formulas 2 and 3. The corresponding 1-14 rows of injection branches are controlled to inject, and the total injection volume is 1750m 3 / h, the flow rate of each steam injection branch pipe is 125m 3 / h.

[0067] In summary, by optimizing and controlling the coupling injection interval and injection volume in real time according to the changes in the end position of the sintering process and the changes in the feeding amount, it can achieve a better coupling effect and better actual production indicators than the method of using fixed injection position and injection volume. After implementation, the sintering utilization coefficient increased by 0.102t / m 2h; the sinter drum strength increased by 0.40%; the sinter yield increased by 0.49%, and the sintering solid fuel consumption decreased by 0.78kg / t year-on-year. The effects of improving quality and reducing consumption are more significant, as shown in Table 1 below:

[0068] Table 1 Comparison of implementation effects

[0069]

[0070] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An adaptively adjustable sintering machine coupled blowing device, characterized in that: The invention comprises a sintering machine trolley, a blowing hood, a coke oven gas blowing mechanism and a steam blowing mechanism; the coke oven gas blowing mechanism comprises a coke oven gas blowing main pipe (1), a coke oven gas blowing branch pipe (3) and a coke oven gas blowing pipe row (5); the steam blowing mechanism comprises a steam blowing main pipe (2), a steam blowing branch pipe (4) and a steam blowing pipe row (6); the sintering machine trolley is located in the blowing hood, the coke oven gas blowing main pipe (1) and the steam blowing main pipe (2) are arranged on the outside of the blowing hood; ... The gas injection pipe row (5) and the steam injection pipe row (6) are arranged in the injection hood above the sintering machine trolley; one end of the coke oven gas injection branch pipe (3) is connected to the coke oven gas injection main pipe (1), and the other end is connected to the coke oven gas injection pipe row (5), and each coke oven gas injection pipe row (5) is provided with 6-20 injection holes; one end of the steam injection branch pipe (4) is connected to the steam injection main pipe (2), and the other end is connected to the steam injection pipe row (6), and each steam injection pipe row (6) is provided with 6-20 injection holes.

2. The self-adaptive sintering machine coupled blowing device according to claim 1, characterized in that: The injection area of the coke oven gas injection mechanism is set at a safe distance of one wind box length behind the ignition and holding furnace, and the injection coverage area is the effective length L of the sintering machine. 有效 The area covered by the steam injection mechanism is within the range of 16.67%-56.67% of the effective length L of the sintering machine. 有效 The area covered by the coke oven gas and steam coupling injection section is the effective length L of the sintering machine. 有效 The range is 34.44%-56.67%.

3. The self-adaptive sintering machine coupled blowing device according to claim 1, characterized in that: The coke oven gas injection main pipe (1) is provided with a coke oven gas injection main pipe flow meter (7), a coke oven gas injection main pipe flow regulating valve (8) and a coke oven gas injection main pipe electric shut-off valve (9); the coke oven gas injection branch pipe (3) is provided with a coke oven gas injection branch pipe flow meter (10), a coke oven gas injection branch pipe flow regulating valve (11) and a coke oven gas injection branch pipe electric shut-off valve (12); and the steam injection branch pipe (4) is provided with a steam injection branch pipe flow meter (13), a steam injection branch pipe flow regulating valve (14) and a steam injection branch pipe electric shut-off valve (15).

4. The self-adaptive sintering machine coupled blowing device according to claim 1, characterized in that: The coke oven gas injection branch pipes (3) and the steam injection branch pipes (4) are arranged in 1-3 rows at equal intervals of 4 m along the length direction of the sintering machine.

5. The self-adaptive sintering machine coupled blowing device according to claim 1, characterized in that: There are multiple bellows under the sintering machine trolley. Each bellows under the sintering machine trolley is provided with a bellows temperature measuring device. The sintering machine is equipped with a control system for controlling the bellows temperature measuring device to monitor the temperature value of each bellows in real time and to form a bellows temperature curve based on the temperature value of each bellows measured by the bellows temperature measuring device. The sintering end point position on the bellows temperature curve and the sintering mixture amount setting value Q are set. 混合料料量 To reasonably adjust and automatically control the position range and injection amount of coke oven gas and steam.

6. A method for the self-adaptive spraying device coupled with a sintering machine according to claim 5, characterized in that: The following steps are involved: S1: The spatial distance values of the coke oven gas injection branch pipes (3) and steam injection branch pipes (4) in the corresponding sintering machine length direction are used as labels to control the effective identification of the first row to the last row of branch pipes by the control system; S2: Set the total amount of coke oven gas injection control ratio J b The coke oven gas flow rate required for each ton of sintering mixture is in the range of 1.2-3.2m 3 / t; S3: Set the steam injection total amount control ratio Z b The steam injection flow rate required for each ton of sintering mixture is in the range of 2.0-3.0m 3 / t; S4: Set the total amount of coke oven gas and steam injection to the total amount of sintering mixture Q 混合料料量 Carry out interlock control, that is, the total amount of coke oven gas injection is controlled by Q 混合料料量 ×J b Automatic control is carried out, and the total amount of steam injection is controlled by Q 混合料料量 ×Z b Perform automatic control; S5: The control system monitors the temperature of each wind box in real time through the wind box temperature measuring device, and compiles the wind box temperature curve according to the temperature values of each wind box measured by the wind box temperature measuring device, and obtains the current sintering end position value L, that is, the length value of the current sintering end position from the starting sintering wind box; S6: The control system compares the current sintering end position value L with the normal sintering end position control target value L0 to realize the control and adjustment of the coke oven gas injection and steam injection area and the flow of each injection branch pipe. Among them, the coke oven gas is adjusted according to the flow of all branches within the control area at 3-7m / s for every 4m. 3 / hThe total amount of injection is automatically distributed and adjusted with different decreasing amplitudes; the total amount of steam injection is automatically evenly adjusted according to the corresponding branches within the control area.

7. The method for spraying a sintering machine coupled with a spraying device with adaptive adjustment according to claim 6, characterized in that: In S6, when |L-L0|≤2m, it indicates that the sintering end position control is within the normal process control range. Then the control system controls the area covered by the coke oven gas injection to be within the ideal range of 16.67%-52.22% of the effective length of the sintering machine. The system controls the area covered by the steam injection to be within the ideal range of 38.89%-61.11% of the effective length of the sintering machine. The area covered by the coke oven gas and steam coupling injection section is within the ideal range of 38.89%-52.22% of the effective length of the sintering machine. The coke oven gas flow rate of all branches within the control area corresponding to every 4m is 5m 3 The total amount of steam injection is automatically distributed and adjusted according to the decreasing amplitude of / h; the total amount of steam injection is automatically evenly adjusted according to the corresponding branches within the control area.

8. The method for spraying a sintering machine coupled with a spraying device with adaptive adjustment according to claim 7, characterized in that: In S6, when L0-L>2m, it indicates that the current sintering end position is advanced. At this time, the control system calculates the coke oven gas injection end position. The specific calculation is based on the following formula: Where: L 有效 is the total effective exhaust length of the sintering machine, m; L is the real-time sintering end position, m; L0 is the control target value of the sintering end position, m; At this time, the coke oven gas injection area is controlled to be L 有效 The injection branch pipes within the range of ×16.67%-L1 are used for injection, and the coke oven gas branch pipes outside this area are automatically cut off, and the flow rate of all branch pipes within the control area is set at 7m per 4m. 3 The total amount of spraying is automatically distributed and adjusted by the decreasing amplitude of / h; At this time, the steam injection starting point position L2 is calculated according to the following formula: The steam injection end point position L3 is calculated according to the following formula: At this time, the steam injection area is the L2-L3 injection branch pipe for injection, and the steam injection branch pipes outside this area are automatically cut off, and the flow rate of each steam injection branch pipe is automatically distributed and adjusted according to the total injection amount.

9. The method for spraying a sintering machine coupled with a spraying device with adaptive adjustment according to claim 8, characterized in that: In S6, when L-L0>2m, it indicates that the current sintering end position is lagging. At this time, the control system calculates the coke oven gas injection end position according to formula 1. At this time, the coke oven gas injection area is controlled to be L 有效 The injection branch pipes within the range of ×16.67%-L1 are used for injection, and the coke oven gas branch pipes outside this area are automatically cut off, and the flow rate of all branch pipes within the control area is set at 3m3 for every 4m. 3 The total amount of spraying is automatically distributed and adjusted by the decreasing amplitude of / h; At this time, the starting and ending positions of the steam injection are also calculated according to Formula 2 and Formula 3, and the injection area is controlled and adjusted, and the flow rate of each steam injection branch pipe in the above area is automatically distributed and adjusted according to the total injection amount.

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