Vanadium-titanium pellet oxygen-enriched roasting consolidation device

Abstract

The invention relates to the technical field of steel production equipment, in particular to a vanadium-titanium pellet oxygen-enriched roasting consolidation device which comprises a gas-coal mixed spraying burner, a high-pressure oxygen supply system and an automatic control system, and the high-pressure oxygen supply system is communicated with the gas-coal mixed spraying burner through a pipeline and used for supplying oxygen to the gas-coal mixed spraying burner; the automatic control system is electrically connected with the high-pressure oxygen supply system and used for monitoring and adjusting oxygen pressure, oxygen of two working conditions is provided, and therefore the device can prevent incomplete combustion caused by insufficient oxygen supply, the combustion efficiency of fuel is improved, and even under the condition that the oxygen consumption changes, the combustion efficiency of the fuel is improved. The roasting effect can be optimally controlled, fuel consumption is reduced through stable oxygen supply, and the quality consistency of pellets and the optimal utilization rate of high-pressure oxygen can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of steel production equipment, and in particular to an oxygen-enriched roasting and consolidation device for vanadium-titanium pellets. Background Art

[0002] The roasting and consolidation of oxidized pellets is highly dependent on high calorific value fuels and high oxidation atmosphere. Oxygen-enriched pellets are made by introducing high-concentration oxygen produced by long-process steel mills into the rotary kiln burner, and using the burner's combustion-supporting air channel to increase the oxygen content of the combustion-supporting air, improve fuel combustion conditions, increase the temperature of the combustion zone, reduce fuel consumption and control ringing.

[0003] In traditional processes, roasting technology is highly dependent on high calorific value fuels, resulting in large fuel consumption, unstable combustion environment formed by oxygen, and difficulty in accurately controlling the degree of oxidation, which affects the quality of pellets and causes unstable equipment operation.

[0004] At present, how to provide a stable combustion-supporting environment for oxidized pellet roasting and consolidation equipment, thereby saving high calorific value fuel consumption has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] The invention provides a vanadium-titanium pellet oxygen-enriched roasting and consolidation device, which is used to solve the problem of how to provide a stable combustion-supporting environment for oxidized pellet roasting and consolidation equipment, thereby achieving the goal of saving high calorific value fuel consumption.

[0006] The present invention provides a vanadium-titanium pellet oxygen-enriched roasting and consolidation device, comprising: Gas-coal mixed injection burner; High-pressure oxygen supply system; connected to the gas-coal mixed injection burner through a pipeline, used to supply oxygen to the gas-coal mixed injection burner; Automatic control system; electrically connected to the high-pressure oxygen supply system to monitor and adjust the oxygen pressure.

[0007] In some embodiments, the high-pressure oxygen supply system comprises: A high-pressure oxygen pipe network; connected to the gas-coal mixed injection burner through a pipeline, used to supply oxygen to the gas-coal mixed injection burner; The first solenoid valve is arranged on the pipeline connecting the gas-coal mixed injection burner and the high-pressure oxygen pipeline network; Stop valve; installed on the pipeline connecting the gas-coal mixed injection burner and the high-pressure oxygen pipeline network.

[0008] In some embodiments, the pressure of oxygen introduced into the high-pressure oxygen pipeline network is 30 KPa.

[0009] In some embodiments, a pressure gauge A is provided on the pipeline between the first solenoid valve and the stop valve.

[0010] In some embodiments, branch pipelines are provided on pipelines at both ends of the first solenoid valve, and a second solenoid valve and a pressure reducing valve are installed on the branch pipelines.

[0011] In some embodiments, the pressure reducing valve is used to reduce the oxygen pressure from 30 KPa to 20 KPa.

[0012] In some embodiments, a pressure gauge B and a third solenoid valve are provided on the branch pipeline at the output end of the pressure reducing valve.

[0013] In some embodiments, a safety discharge pipeline is further provided on the pipeline connecting the gas-coal mixed injection burner and the high-pressure oxygen pipeline network, and a safety valve is provided on the safety discharge pipeline.

[0014] In some embodiments, the first solenoid valve, the stop valve, the pressure gauge A, the second solenoid valve, the pressure reducing valve, the pressure gauge B, the third solenoid valve and the safety valve are all electrically connected to an automatic control system.

[0015] In some embodiments, a plurality of groups of flow guides are provided on the inner wall of the pipeline connecting the stop valve and the gas-coal mixed injection burner.

[0016] The beneficial effects of the present invention are as follows: an oxygen-enriched roasting and consolidation device for vanadium-titanium pellets of the present invention inputs oxygen with a pressure of 30KPa through a high-pressure oxygen pipeline network. When the actual working conditions require the stability and continuity of the oxygen supply, the first solenoid valve is closed, and the second solenoid valve, the third solenoid valve and the stop valve are opened, so that the oxygen with a pressure of 30KPa in the high-pressure oxygen pipeline network is reduced to 20KPa through the pressure reducing valve, and then input into the gas-coal mixed injection burner. At this time, incomplete combustion caused by insufficient oxygen supply can be prevented, thereby improving the combustion efficiency of the fuel. If necessary, the oxygen supply can be flexibly adjusted to meet production needs. If required, the first solenoid valve and the stop valve are opened, and the second solenoid valve and the third solenoid valve are closed, so that oxygen with a pressure of 30KPa is directly input into the gas-coal mixed injection burner, so that the roasting effect can be optimally controlled even when the oxygen consumption changes. At the same time, the present invention also provides a pressure gauge A for monitoring the 30KPa oxygen supply pipeline, and a pressure gauge B for monitoring the 20KPa oxygen supply pipeline. Once the oxygen pressure entering the gas-coal mixed injection burner does not meet the standard, the pressure gauge A or the pressure gauge B will quickly transmit the information to the automatic control system to notify the management personnel to check and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of some specific embodiments of a vanadium-titanium pellet oxygen-enriched roasting and consolidation device of the present invention; Figure 2 yes Figure 1 A schematic structural diagram of a drainage component in an oxygen-enriched roasting and consolidation device for vanadium-titanium pellets is shown; Figure 3 yes Figure 2 The figure shows a schematic diagram of the expansion of a drainage component in an oxygen-enriched roasting and consolidation device for vanadium-titanium pellets.

[0018] In the attached drawings, 1. gas-coal mixed spray burner; 2. high-pressure oxygen pipeline network; 3. first solenoid valve; 4. stop valve; 5. pressure gauge A; 6. second solenoid valve; 7. pressure reducing valve; 8. pressure gauge B; 9. third solenoid valve; 10-safety valve; 11-automatic control system; 12-flow guide; 13-fourth solenoid valve; 14-pressure regulating valve; 15-pressure gauge C. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0020] In traditional processes, roasting technology is highly dependent on high calorific value fuels, resulting in large fuel consumption, unstable combustion environment formed by oxygen, and difficulty in accurately controlling the degree of oxidation, which affects the quality of pellets and causes unstable equipment operation. At present, how to provide a stable combustion environment for oxidized pellet roasting and consolidation equipment to save high calorific value fuel consumption has become a technical problem that needs to be urgently solved by technical personnel in this field.

[0021] To solve the above problems, refer to Figure 1 , Figure 2 and Figure 3 The present invention provides an oxygen-enriched roasting and consolidation device for vanadium-titanium pellets, comprising a gas-coal mixed injection burner 1, a high-pressure oxygen supply system and an automatic control system. The high-pressure oxygen supply system is connected to the gas-coal mixed injection burner 1 through a pipeline and is used to supply oxygen to the gas-coal mixed injection burner 1. The automatic control system is electrically connected to the high-pressure oxygen supply system and is used to monitor and adjust the oxygen pressure.

[0022] Preferably, the high-pressure oxygen supply system includes: a high-pressure oxygen pipeline network 2, a first solenoid valve 3 and a stop valve 4; the high-pressure oxygen pipeline network 2 is connected to the gas-coal mixed injection burner 1 through a pipeline, and is used to supply oxygen to the gas-coal mixed injection burner 1, the first solenoid valve 3 is arranged on the pipeline connecting the gas-coal mixed injection burner 1 and the high-pressure oxygen pipeline network 2, and the stop valve 4 is arranged on the pipeline connecting the gas-coal mixed injection burner 1 and the high-pressure oxygen pipeline network 2.

[0023] Specifically, the gas-coal mixed spray burner 1 is arranged in the rotary kiln, and is mainly used to generate the high temperature conditions required for the roasting process. By being connected to the high-pressure oxygen pipeline network 2, the gas-coal mixed spray burner 1 can obtain additional combustion-supporting oxygen to improve the combustion efficiency. The high-pressure oxygen pipeline network 2 is set to introduce an oxygen-rich environment, improve the thermal efficiency of the combustion process and the control of the oxidizing atmosphere. The high-pressure oxygen is adjusted through the first solenoid valve 3 and the second solenoid valve 6 to adjust the pressure of the oxygen, and the stop valve 4 is used to adjust and control its flow rate and supply time, so as to flexibly adjust the oxygen supply during the roasting process. In addition, such a structure can ensure that oxygen is effectively utilized mainly in the combustion area, reducing unnecessary oxygen waste. The technical solution of the present invention creates an efficient roasting system, reduces energy consumption, improves product quality, and reduces the emission of harmful gases.

[0024] Preferably, the pressure of oxygen introduced into the high-pressure oxygen pipeline network 2 is 30 KPa.

[0025] Specifically, the oxygen pressure in the high-pressure oxygen pipe network 2 is preferably not less than 30 KPa, and at least not less than 20 KPa.

[0026] Furthermore, the oxygen pressure is not less than 20KPa, which can ensure the stability and continuity of the oxygen supply. This pressure setting can prevent incomplete combustion caused by insufficient oxygen supply, thereby improving the combustion efficiency of the fuel. At the same time, this pressure control can also promote the oxidation reaction of the material by increasing the combustion temperature and improve the pressure resistance of the pellets. In addition, the pressure-stable oxygen supply can also reduce the ringing phenomenon and increase the operational stability in the high-temperature zone. Therefore, by ensuring that the oxygen pressure is within the appropriate range, the effect of the roasting process and the operating efficiency of the device can be greatly improved.

[0027] Furthermore, if the pressure is maintained at 30KPa, this ensures that the oxygen supply can be flexibly adjusted to meet production needs under different operating conditions. The benefit of this is that the roasting effect can be optimally controlled even when the oxygen consumption changes. Stable oxygen supply not only reduces fuel consumption, but also ensures the quality consistency of pellets and the optimal utilization of high-pressure oxygen. The production stability brought by this control accuracy effectively improves the overall production efficiency, while reducing the instability of product quality caused by fluctuations in oxygen flow.

[0028] Preferably, a pressure gauge A5 is provided on the pipeline between the first solenoid valve 3 and the stop valve 4.

[0029] Specifically, the pressure gauge A5 is used to detect the 30KPa oxygen supply pipeline. If the oxygen pressure is lower than 30KPa, the pressure gauge A5 will quickly feed back the information to the automatic control system, and the automatic control system will control the stop valve 4 to close.

[0030] Preferably, branch pipelines are provided on the pipelines at both ends of the first solenoid valve 3 , and the second solenoid valve 6 and the pressure reducing valve 7 are installed on the branch pipelines.

[0031] Specifically, the pressure reducing valve 7 provided in the present invention is used to reduce the pressure of oxygen in the high-pressure oxygen network 2 from 30 KPa to 20 KPa, and finally input it into the gas-coal mixed injection burner 1 for combustion support, so that the technical solution of the present invention has two adjustable working conditions.

[0032] Preferably, a pressure gauge B8 and a third solenoid valve 9 are provided on the branch pipeline at the output end of the pressure reducing valve 7 .

[0033] Specifically, the pressure gauge B8 is used to detect the 20KPa oxygen supply pipeline. If the oxygen pressure is lower than 20KPa, the pressure gauge B8 will quickly feed back the information to the automatic control system, and the automatic control system will control the stop valve 4 to close.

[0034] Preferably, a safety discharge pipeline is further provided on the pipeline connecting the gas-coal mixed injection burner 1 and the high-pressure oxygen pipeline network 2, and a safety valve 10 is provided on the safety discharge pipeline.

[0035] Specifically, if the oxygen pressure is too high, exceeding the preset 30KPa or 20KPa, the safety valve 10 is opened to discharge and release the pressure. If the pressure is lower than the preset 30KPa or 20KPa, the safety valve 10 can also be actively opened to discharge to prevent insufficient pressure oxygen from entering the gas-coal mixed injection burner 1 and affecting the roasting effect.

[0036] Preferably, the first solenoid valve 3 , the stop valve 4 , the pressure gauge A5 , the second solenoid valve 6 , the pressure reducing valve 7 , the pressure gauge B8 , the third solenoid valve 9 and the safety valve 10 are all electrically connected to the automatic control system 11 .

[0037] Specifically, the linkage configuration of the automatic control system 11 is used to improve the response speed and accuracy of the oxygen supply. By monitoring the oxygen pressure in real time, the automatic control system 11 can quickly close the stop valve 4 when an abnormal oxygen supply is detected, thereby preventing temperature fluctuations during the roasting process. The main advantage of this setting is that it can ensure the stability of the oxygen supply without affecting the production efficiency, thereby enhancing the combustion efficiency of the fuel. In addition, the automatic control system 11 can also reduce human operation errors and improve the degree of automation and safety of production. By using advanced sensing technology, the system can accurately detect changes in oxygen demand and make timely adjustments, which can effectively reduce energy consumption, improve economic benefits, adapt to changes in different production conditions, and improve production flexibility.

[0038] Furthermore, the automatic control system 11 is also provided with an alarm device for sounding an alarm when an abnormality occurs. The operating status of each key component is continuously monitored, and an alarm is sounded when an abnormality is detected to notify the management personnel to conduct inspection and repair. Through such a monitoring mechanism, preventive maintenance can be carried out in the early stages of the problem, thereby reducing the risk of equipment failure and downtime. In addition, this setting can also greatly improve operational safety and reduce potential safety hazards and economic losses caused by equipment failure.

[0039] Furthermore, in the technical solution of the present invention, another branch is provided on the pipeline connecting the gas-coal mixed injection burner 1 and the high-pressure oxygen pipeline network 2 for adjusting the oxygen pressure. The branch is provided with a fourth solenoid valve 13 and a pressure regulating valve 14. When the oxygen pressure output in the system does not meet the standard, the stop valve 4 can be closed, the fourth solenoid valve 13 can be opened, and the oxygen pressure can be adjusted by the pressure regulating valve 14, and then the oxygen is input into the gas-coal mixed injection burner 1 for use. A pressure gauge C15 is installed on the pipeline at the output end of the pressure regulating valve 14 for detecting whether the output pressure meets the standard.

[0040] The stop valve 4 is set near the gas-coal mixed injection burner 1. First, it can quickly cut off the oxygen supply in an emergency, minimize the retention of oxygen in the pipeline, and improve the safety of the system. This is particularly important for preventing potential safety hazards caused by oxygen leakage or burner failure, and can isolate the combustion area in the shortest time. Secondly, it helps to optimize the response time of oxygen. Since the stop valve 4 is closer to the burner, the path for oxygen to reach the combustion area is shortened when adjusting the oxygen supply, the response speed is faster, and the control accuracy of the combustion process is improved. In addition, due to the shortening of the oxygen path, the oxygen flow loss caused by the pressure drop in the pipeline is reduced, so that the actual flow of oxygen can be controlled more accurately. This precise oxygen supply helps to improve combustion efficiency, reduce fuel consumption, and further optimize the economy of the roasting process.

[0041] Preferably, a plurality of groups of flow guide members 12 are provided on the inner wall of the pipeline connecting the stop valve 4 and the gas-coal mixed injection burner 1 .

[0042] Specifically, the guide member 12 is in the shape of an elongated teardrop and is arranged in a spiral shape in the pipeline. Multiple groups are provided along the length of the pipeline, which can speed up the flow rate of oxygen and adjust the speed at which oxygen reaches the combustion area when the oxygen supply is adjusted, further improving the response speed and the control accuracy of the combustion process.

[0043] In the present application, the gas-coal mixed injection burner 1 is mainly used to generate the high temperature conditions required for the roasting process. By being connected to the high-pressure oxygen pipeline network, the gas-coal mixed injection burner 1 can obtain additional combustion-supporting oxygen to improve the combustion efficiency. The high-pressure oxygen pipeline network 2 is set to introduce an oxygen-rich environment, improve the thermal efficiency of the combustion process and control the oxidizing atmosphere. The high-pressure oxygen is regulated and controlled by the pressure regulating valve 14 and the stop valve 4 to adjust and control its flow rate and supply time, so as to flexibly adjust the oxygen supply during the roasting process. In addition, such a structure can ensure that oxygen is effectively utilized mainly in the combustion area, reducing unnecessary oxygen waste. The present invention discloses an efficient roasting system, which reduces energy consumption, improves product quality, and reduces the emission of harmful gases. Under the same heat output, the fuel consumption is significantly reduced, which brings significant economic benefits and ensures the overall operation stability.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A vanadium-titanium pellet oxygen-enriched roasting and consolidation device, characterized in that: include: Gas-coal mixed injection burner (1); A high-pressure oxygen supply system, connected to the gas-coal mixed injection burner (1) through a pipeline, for supplying oxygen to the gas-coal mixed injection burner (1); Automatic control system; electrically connected to the high-pressure oxygen supply system to monitor and adjust the oxygen pressure.

2. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 1 is characterized in that: The high-pressure oxygen supply system comprises: A high-pressure oxygen pipe network (2) is connected to the gas-coal mixed injection burner (1) through a pipeline and is used to supply oxygen to the gas-coal mixed injection burner (1); A first solenoid valve (3) is arranged on a pipeline connecting the gas-coal mixed injection burner (1) and the high-pressure oxygen pipeline network (2); The stop valve (4) is arranged on the pipeline connecting the gas-coal mixed injection burner (1) and the high-pressure oxygen pipeline network (2).

3. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 2 is characterized in that: The pressure of oxygen introduced into the high-pressure oxygen pipe network (2) is 30 KPa.

4. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 2 is characterized in that: A pressure gauge A (5) is provided on the pipeline between the first solenoid valve (3) and the stop valve (4).

5. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 4 is characterized in that: Branch pipelines are provided on the pipelines at both ends of the first solenoid valve (3), and a second solenoid valve (6) and a pressure reducing valve (7) are installed on the branch pipelines.

6. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 5, characterized in that: The pressure reducing valve (7) is used to reduce the oxygen pressure from 30 KPa to 20 KPa.

7. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 6, characterized in that: A pressure gauge B (8) and a third solenoid valve (9) are provided on the branch pipeline at the output end of the pressure reducing valve (7).

8. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 7, characterized in that: A safety discharge pipeline is also provided on the pipeline connecting the gas-coal mixed injection burner (1) and the high-pressure oxygen pipeline network (2), and a safety valve (10) is provided on the safety discharge pipeline.

9. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 8, characterized in that: The first solenoid valve (3), the stop valve (4), the pressure gauge A (5), the second solenoid valve (6), the pressure reducing valve (7), the pressure gauge B (8), the third solenoid valve (9) and the safety valve (10) are all electrically connected to the automatic control system (11).

10. The oxygen-enriched roasting and consolidation device for vanadium-titanium pellets according to claim 1, characterized in that: A plurality of groups of flow guide members (12) are provided on the inner wall of a pipeline connecting the stop valve (4) and the gas-coal mixed injection burner (1).

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