A device and method for measuring transverse uniformity of a sintering machine

Abstract

The present invention discloses a device and method for measuring the transverse uniformity of a sintering machine, and relates to the technical field of iron ore sintering. The device and method for measuring the transverse uniformity of a sintering machine include a charging assembly, an internal exhaust pipe, a pipeline interface, an external exhaust pipe, a pressure detection component, a flow detection component, a regulating valve, and an exhaust fan. The charging assembly is arranged under the grate bars of the sintering trolley, and is connected to the pipeline interface arranged on the side railing of the sintering trolley through the internal exhaust pipe. The device and method for measuring the transverse uniformity of a sintering machine make up for the defects of the prior art. The technology integrates multiple factors such as sintering mixing granulation and material distribution, loosening, and pressing on the sintering machine, and realizes the transverse area permeability detection of the sintering material layer. At the same time, it breaks the limitations of the prior art and realizes the simultaneous detection of the permeability of the material layer in different transverse areas of the sintering machine, providing a technical solution for finding out the difference in the transverse permeability of the sintering machine material layer, and points out the direction for improving the uniformity of the sintering cross section.

Description

Technical Field

[0001] The invention relates to the technical field of iron ore sintering, and in particular to a device and method for measuring the transverse uniformity of a sintering machine. Background Art

[0002] During the sintering process, air must be supplied to the material layer so that the combustion reaction of the solid fuel can proceed, the mixed material layer can obtain the necessary high temperature, and the material sintering can be successfully realized. The flow condition and change law of the gas in the sintering material layer are related to the mass transfer, heat transfer and physical and chemical reaction process of the sintering process. Therefore, the permeability of the sintering material layer is crucial to the entire sintering process, and has a great impact on the production, quality and energy consumption of the sintered ore. Poor permeability affects the vertical sintering speed and sintering utilization coefficient, and ultimately affects the sintered ore output; too good permeability leads to too fast vertical burning speed, short residence time in the high temperature zone, and failure to form sufficient sintering liquid phase, affecting the quality of the sintered ore.

[0003] In recent years, sintering equipment has been continuously developed towards large-scale. As the width of the sintering machine increases, the uniformity of the sintering trolley in the horizontal direction (i.e. in the width direction) has become prominent. The horizontal uniformity of the material layer of the sintering trolley is the basic condition to ensure the consistency of the vertical sintering speed on the cross section of the material layer. It can maximize the stability of the sintering machine operation, reduce the "overburning" and "underburning" phenomena, directly affect the stability of the sintered ore quality, and is conducive to improving the quality of sintered ore.

[0004] However, in the prior art, it is difficult to measure the transverse uniformity of the sintering machine well, and the vertical sintering speed on the cross section of the material layer is easily uneven due to poor transverse uniformity, thereby increasing the probability of "overburning" and "underburning", reducing product stability and causing fuel waste. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a device and method for measuring the transverse uniformity of a sintering machine, which solves the problem that it is difficult to measure the transverse uniformity of a sintering machine in the prior art, and the vertical sintering speed on the cross section of the material layer is not uniform due to poor transverse uniformity, thereby increasing the probability of "overburning" and "underburning" phenomena.

[0007] To achieve the above purpose, the present invention is implemented through the following technical solutions: a device for measuring the transverse uniformity of a sintering machine, comprising a charging assembly, an inner exhaust pipe, a pipeline interface, an outer exhaust pipe, a pressure detection component, a flow detection component, a regulating valve, and an exhaust fan. The charging assembly is arranged under the grate bars of the sintering trolley, and is connected to the pipeline interface arranged on the side railing of the sintering trolley through the inner exhaust pipe, the pipeline interface is connected to the exhaust fan through the outer exhaust pipe, the pressure detection component is connected to the outer exhaust pipe, and the flow detection component and the regulating valve are connected in series in the outer exhaust pipe.

[0008] Preferably, the charging assembly is mainly composed of a plurality of sub-charging assemblies which are distributed in parallel laterally on the sintering trolley.

[0009] Preferably, the sub-charging assembly is mainly composed of a material cup, a grate bar, a spiral support rod, a driving device, and an air chamber. The spiral support rod is fixedly connected to the bottom of the grate bar of the sintering trolley through the air chamber, the upper end of the spiral support rod is connected to the grate bar through a bearing, the spiral support rod is connected to the material cup through a thread, the driving device is connected to the spiral support rod for driving the spiral support rod to rotate, and the air chamber is connected to the exhaust pipe.

[0010] Preferably, the material cup height is the height of the sintering material layer, and is raised and lowered by rotating the spiral support rod. When it is in the lower limit position, the upper edge of the material cup is flush with the grate bars, and when it is in the upper limit position, the material cup boss and the air chamber convex edge form a sealing structure.

[0011] A method for measuring the transverse uniformity of a sintering machine comprises the above-mentioned device for measuring the transverse uniformity of a sintering machine and adopts the following steps:

[0012] S1. Before loading the sintering trolley, make sure that the material cup is at the lower limit position;

[0013] S2, turn off the ignition furnace, and the sintering trolley moves while distributing materials;

[0014] S3. After the fabric is flattened, the external air extraction pipe is sealed and connected to the pipeline interface;

[0015] S4, start the driving device to drive the spiral support rod to rotate, so that the material cup rises to the upper limit and stops, at which time the material cup boss and the air chamber convex edge form a sealing structure;

[0016] S5. Start the exhaust fan to generate negative pressure in the material cup, adjust the regulating valve to make the exhaust negative pressure reach the sintering negative pressure, record the flow rate and pressure data, and calculate the permeability index of the material layer using the permeability index formula;

[0017] S6. Stop the exhaust fan, start the driving device to drive the spiral support rod to rotate in the opposite direction, so that the material cup drops to the lower limit and stops, and disconnect the external exhaust pipe from the pipeline interface.

[0018] The present invention provides a device and method for measuring the transverse uniformity of a sintering machine. The device and method have the following beneficial effects: The device and method for measuring the transverse uniformity of a sintering machine make up for the defects of the prior art. The technology integrates multiple factors such as sintering mixing and granulation and material distribution, loosening, and pressing on the sintering machine, and realizes the transverse area permeability detection of the sintering material layer. At the same time, it breaks the limitations of the prior art and realizes the simultaneous detection of the permeability of the material layers in different transverse areas of the sintering machine, providing a technical solution for finding out the difference in the transverse permeability of the material layers of the sintering machine, and points out the direction for improving the uniformity of the sintering cross section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a device for measuring the transverse uniformity of a sintering machine according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the sub-charging assembly when the material cup is at the upper limit position in the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the sub-charging assembly when the material cup is at the lower limit position in the present invention;

[0022] Figure 4 Schematic diagram of the measurement results of the lateral uniformity of the sintering machine.

[0023] In the figure: 1. charging assembly; 2. inner exhaust pipe; 3. pipeline interface; 4. outer exhaust pipe; 5. pressure detection component; 6. flow detection component; 7. regulating valve; 8. exhaust fan; 9. sub-charging assembly; 10. sintering trolley; 11. ignition furnace; 91. material cup; 92. grate bar; 93. spiral support rod; 94. driving device; 95. air chamber; 911. upper edge of material cup; 912. material cup boss; 951. air chamber convex edge. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-4The present invention provides a technical solution: a device for measuring the transverse uniformity of a sintering machine, comprising a charging assembly 1, an inner exhaust pipe 2, a pipeline interface 3, an outer exhaust pipe 4, a pressure detection component 5, a flow detection component 6, a regulating valve 7, and an exhaust fan 8. The charging assembly 1 is arranged below the grate bars of the sintering trolley 10. The charging assembly 1 is mainly composed of a plurality of sub-charging assemblies 9 that are laterally distributed in parallel on the sintering trolley 10. The sub-charging assembly 9 is mainly composed of a material cup 91, a grate bar 92, a spiral support rod 93, a driving device 94, and an air chamber 95. The height of the material cup 91 is the height of the sintering material layer. The material cup 91 is raised and lowered by rotating the spiral support rod 93. When the material cup is at the lower limit position, the upper edge 911 of the material cup is flush with the grate bar 92. When the material cup is at the upper limit position, the boss 912 of the material cup and the convex edge 951 of the air chamber form a sealing structure. The spiral support rod 93 is fixed by the air chamber 95. It is connected under the grate bars of the sintering trolley 10, the upper end of the spiral support rod 93 is connected to the grate bars 92 through a bearing, the spiral support rod 93 is connected to the material cup 91 through a thread, the driving device 94 is connected to the spiral support rod 93 to drive the spiral support rod 93 to rotate, the air chamber 95 is connected to the inner exhaust pipe 2, and is connected to the pipe interface 3 arranged on the side railing of the sintering trolley 10 through the inner exhaust pipe 2, the pipe interface 3 is connected to the exhaust fan 8 through the outer exhaust pipe 4, the pressure detection component 5 is connected to the outer exhaust pipe 4, and the flow detection component 6 and the regulating valve 7 are connected in series in the outer exhaust pipe 4.

[0026] A method for measuring the transverse uniformity of a sintering machine comprises the above-mentioned device for measuring the transverse uniformity of a sintering machine and adopts the following steps:

[0027] S1. Before loading the sintering trolley 10, confirm that the material cup 91 is at the lower limit position;

[0028] S2, turn off the ignition furnace, and the sintering trolley 10 moves while distributing materials;

[0029] S3, after the fabric is flattened, the external air extraction pipe 4 is sealed and connected to the pipeline interface 3;

[0030] S4, start the driving device 94 to drive the spiral support rod 93 to rotate, so that the material cup 91 rises to the upper limit and stops, at which time the material cup boss 912 and the air chamber convex edge 951 form a sealing structure;

[0031] S5, start the exhaust fan 8, generate negative pressure in the material cup 91, adjust the regulating valve 7 to make the exhaust negative pressure reach the sintering negative pressure, record the flow rate and pressure data, and calculate the permeability index of the material layer using the permeability index formula;

[0032] S6, stop the exhaust fan 8, start the driving device 94 to drive the spiral support rod 93 to rotate in the opposite direction, so that the material cup 91 descends to the lower limit position and stops, and the external exhaust pipe 4 is disconnected from the pipeline interface 3. Example

[0033] See also Figure 1The present embodiment is a device for measuring the transverse uniformity of a sintering machine, which is mainly composed of a charging assembly 1, an inner exhaust pipe 2, a pipe interface 3, an outer exhaust pipe 4, a pressure detection component 5, a flow detection component 6, a regulating valve 7, and an exhaust fan 8. The charging assembly 1 is arranged under the grate bars of the sintering trolley 10, and is connected to the pipe interface 3 arranged on the side railing of the sintering trolley 10 through the inner exhaust pipe 2, the pipe interface 3 is connected to the exhaust fan 8 through the outer exhaust pipe 4, the pressure detection component 5 is connected to the outer exhaust pipe 4, and the flow detection component 6 and the regulating valve 7 are connected in series in the outer exhaust pipe 4.

[0034] The charging assembly 1 in this embodiment is mainly composed of a plurality of sub-charging assemblies 9 that are distributed in parallel in the lateral direction of the sintering trolley 10. The specific number and spacing can be selected and designed according to the width of the sintering trolley 10 used. This embodiment takes five sub-charging assemblies 9 as an example to illustrate this scheme. The five sub-charging assemblies 9 are arranged in parallel along the same straight line with equal spacing.

[0035] Combination Figure 2 and Figure 3 The sub-charging assembly 9 of this embodiment is mainly composed of a material cup 91, a grate bar 92, a spiral support rod 93, a driving device 94, and an air chamber 95. The spiral support rod 93 is fixedly connected to the bottom of the grate bar of the sintering trolley 10 through the air chamber 95, the upper end of the spiral support rod 93 is connected to the grate bar 92 through a bearing, the spiral support rod 93 is connected to the material cup 91 through a thread, the driving device 94 is connected to the spiral support rod 93 for driving the spiral support rod 93 to rotate, and the air chamber 95 is connected to the inner exhaust pipe 2.

[0036] The height of the material cup 91 in this embodiment is the height of the sintering material layer. The material cup 91 is raised and lowered by rotating the spiral support rod 93. When the material cup 91 is at the lower limit position, the upper edge 911 of the material cup is flush with the grate bar 92. When the material cup 91 is at the upper limit position, the material cup boss 912 and the air chamber convex edge 951 form a sealing structure. Example

[0037] A method for measuring the transverse uniformity of a sintering machine in this embodiment is performed using the above-mentioned transverse uniformity measuring device for a sintering machine, and the steps are as follows:

[0038] Step 1: Before loading the sintering trolley 10, confirm that the material cup 91 is at the lower limit position, and the upper edge 911 of the material cup is flush with the grate bar 92;

[0039] Step 2: Turn off the ignition furnace, and the sintering trolley 10 moves while distributing the materials;

[0040] Step 3: After the fabric is flattened, the external air extraction pipe 4 is sealed and connected to the pipeline interface 3;

[0041] Step 4: Start the driving device 94 to drive the spiral support rod 93 to rotate, so that the material cup 91 rises to the upper limit and stops. At this time, the material cup is filled with the sintered mixed material that has been granulated, distributed, loosened and pressed. The material cup boss 912 and the air chamber convex edge 951 form a sealing structure to prevent air from leaking into the material cup 91;

[0042] Step 5, start the exhaust fan 8, negative pressure is generated in the material cup 91, and the air above the sintering material layer is sucked into the sintering material layers of the five material cups 91 respectively, passing through the air chamber 95, the inner exhaust pipe 2, the pipeline interface 3, the outer exhaust pipe 4, the pressure detection component 5, the flow detection component 6, and the regulating valve 7 in sequence.

[0043] Step 6: Adjust the regulating valve 7 to make the exhaust negative pressure reach the sintering negative pressure, record the flow rate and pressure data, and calculate the permeability index of the material layer at five points in the lateral direction of the sintering machine;

[0044] The permeability index of the sintered material layer is calculated according to the E. W. Vois (Voice) formula: , where M ——air permeability index, JPU;

[0045] Q ——Air volume passing through the material layer, m 3 / min;

[0046] A 效 ——Effective sintering area, m 2 ;

[0047] h ——Sintering layer thickness, mm;

[0048] P ——Ventilation negative pressure, Pa;

[0049] Step 7, stop the exhaust fan 8, start the driving device 94 to drive the spiral support rod 93 to rotate in the opposite direction, so that the material cup 91 descends to the lower limit position and stops, and disconnects the external exhaust pipe 4 from the pipeline interface 3.

[0050] The results of the measurement of the lateral uniformity of the sintering machine in this embodiment are as follows: Figure 4 shown.

[0051] In summary, the device and method for measuring the transverse uniformity of a sintering machine make up for the defects of the existing technology. The technology integrates multiple factors such as sintering mixing and granulation and material distribution, loosening, and pressing on the sintering machine, and realizes the transverse area permeability detection of the sintering material layer. At the same time, it breaks the limitations of the existing technology and realizes the simultaneous detection of the permeability of material layers in different transverse areas of the sintering machine. It provides a technical solution for finding out the differences in the transverse permeability of the sintering machine material layer and points out the direction for improving the uniformity of the sintering cross section.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for measuring the transverse uniformity of a sintering machine, characterized in that: The invention comprises a device for measuring the transverse uniformity of a sintering machine, which comprises a charging assembly (1), an inner exhaust pipe (2), a pipeline interface (3), an outer exhaust pipe (4), a pressure detection component (5), a flow detection component (6), a regulating valve (7), and an exhaust fan (8). The charging assembly (1) is arranged below the grate bars of a sintering trolley (10), and is connected to a pipeline interface (3) arranged on a side railing of the sintering trolley (10) through the inner exhaust pipe (2). The pipeline interface (3) is connected to the exhaust fan (8) through the outer exhaust pipe (4). The pressure detection component (5) is connected to the outer exhaust pipe (4). The flow detection component (6) and the regulating valve (7) are connected in series in the outer exhaust pipe (4). The charging assembly (1) is mainly composed of a plurality of sub-charging assemblies (9) which are arranged in parallel in the transverse direction of the sintering trolley (10); The sub-charging assembly (9) mainly consists of a material cup (91), a grate bar (92), a spiral support rod (93), a driving device (94), and an air chamber (95); the spiral support rod (93) is fixedly connected to the bottom of the grate bar of the sintering trolley (10) through the air chamber (95); the upper end of the spiral support rod (93) is connected to the grate bar (92) through a bearing; the spiral support rod (93) is connected to the material cup (91) through a thread; the driving device (94) is connected to the spiral support rod (93) for driving the spiral support rod (93) to rotate; and the air chamber (95) is connected to the inner exhaust pipe (2); The material cup (91) has a height equal to the height of the sintering material layer and is raised and lowered by rotating the spiral support rod (93). When the material cup is in the lower limit position, the upper edge (911) of the material cup is flush with the grate bar (92). When the material cup is in the upper limit position, the material cup boss (912) and the air chamber boss (951) form a sealing structure. The specific steps are as follows: S1. Before loading the sintering trolley (10), confirm that the material cup (91) is at the lower limit position; S2, the ignition furnace is turned off, and the sintering trolley (10) is moving while distributing the materials; S3, after the fabric is flattened, the external air extraction pipe (4) is sealed and connected to the pipeline interface (3); S4, starting the driving device (94) to drive the spiral support rod (93) to rotate, so that the material cup (91) rises to the upper limit position and stops, at which time the material cup boss (912) and the air chamber convex edge (951) form a sealing structure; S5. Start the exhaust fan (8) to generate negative pressure in the material cup (91), adjust the regulating valve (7) to make the exhaust negative pressure reach the sintering negative pressure, record the flow rate and pressure data, and use the permeability index formula to calculate the permeability index of the material layer, wherein the E. W. Vois (Voice) formula is used to calculate the permeability index of the sintering material layer: , where M ——air permeability index, JPU; Q ——The air volume passing through the material layer, which is also the flow rate recorded above, m 3 / min; A 效 ——Effective sintering area, m 2 ; h ——Sintering material layer thickness, mm; P ——Ventilation negative pressure, Pa; S6, stop the exhaust fan (8), start the driving device (94) to drive the spiral support rod (93) to rotate in the opposite direction, so that the material cup (91) descends to the lower limit position and stops, and disconnects the external exhaust pipe (4) from the pipeline interface (3).

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