Energy-saving belt type pre-reduction roaster

Abstract

The utility model relates to metallurgical engineering technical field provides an energy -saving type belt type pre -reduction roaster, including the roaster body, the top of roaster body is fixed with the waste heat recovery structure, the bottom of roaster body is penetrated with the belt conveyor, one side of roaster body is provided with the heat recovery structure. The utility model discloses through being provided with the heat recovery structure, through the hot gas of material that the belt conveyor top delivery can produce, inhale the hot gas storage box, subsequently through the gas tank and send the absorbed hot gas to the front end of roaster body, utilize hot -blast preheating into the combustion air of roaster body inside, improve the combustion efficiency, reduce fuel consumption, realized the device to have the function of convenient recycling of hot steam, improved the environmental protection of this energy -saving type belt type pre -reduction roaster when using.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical engineering technology, and in particular to an energy-saving belt-type pre-reduction roasting machine. Background Technology

[0002] In the metallurgical industry, the pre-reduction roasting of iron ore is a key step in improving subsequent smelting efficiency and reducing energy consumption. This process involves heating the iron ore to partially reduce the iron oxides in it to easily smelted low-valence iron oxides, while simultaneously removing impurities such as moisture and volatile matter.

[0003] The limitations of existing technologies in terms of energy consumption, efficiency, environmental protection, and adaptability significantly contradict the current development trend of "green, low-carbon, high-efficiency, and intelligent" in the metallurgical industry. Therefore, it is necessary to design an energy-saving belt-type pre-reduction roasting machine. Utility Model Content

[0004] The purpose of this invention is to provide an energy-saving belt pre-reduction roasting machine to address the limitations of existing belt pre-reduction roasting machines in terms of energy efficiency and environmental protection.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an energy-saving belt-type pre-reduction roasting machine, including a roasting machine body;

[0006] The top of the roasting machine body is fixed with a waste heat recovery structure, and the bottom of the roasting machine body is penetrated by a belt conveyor.

[0007] A heat recovery structure is provided on one side of the roasting machine body. The heat recovery structure includes a support set on one side of the roasting machine body. A heat storage box is fixed on the inner wall of the top of the support. Suction fans are fixed on both sides of the bottom of the heat storage box. A gas delivery box is fixed on one side of the heat storage box.

[0008] Heating components are uniformly fixed on the inner wall of the roasting machine body, and gas detection structures are fixed at the middle position of the top and the middle position of the bottom of the roasting machine body.

[0009] Furthermore, the waste heat recovery structure includes a waste heat recovery box, a connecting pipe, and a waste heat recovery pipe. The waste heat recovery box is fixed to the top of the roasting machine body, a connecting pipe is fixed to one side of the top of the waste heat recovery box, and a waste heat recovery pipe is fixed to one side of the bottom of the waste heat recovery box.

[0010] Furthermore, the bottom end of the waste heat recovery pipe extends into the interior of the roasting machine body.

[0011] Furthermore, the gas supply box extends into the interior of the roasting machine body at one end away from the support, and the suction fans are symmetrically distributed on both sides of the hot gas storage box.

[0012] Furthermore, the heating assembly includes a fuel pipe, a flame limiting pipe, and a nozzle. The fuel pipe is uniformly fixed on the inner walls of both sides of the bottom of the roasting machine body and the inner walls of both sides of the top of the roasting machine body. A flame limiting pipe is uniformly fixed on one side of the fuel pipe, and a nozzle is fixed on one end of each flame limiting pipe.

[0013] Furthermore, one end of the fuel pipe is connected to a low-NOx burner, the fuel pipes are symmetrically distributed on both sides of the roasting machine body, and the flame limiting pipes are evenly distributed on one side of the fuel pipes.

[0014] Furthermore, the gas detection structure includes a main pipe, a gas receiving pipe, and valves. The main pipe is fixed to both sides inside the roasting machine body, and a gas receiving pipe is uniformly fixed to one side of the main pipe. A valve is fixed inside each gas receiving pipe.

[0015] Furthermore, a gas detector is connected to one end of each main pipe, and gas receiving tubes are evenly distributed on one side of the main pipe.

[0016] The present invention provides an energy-saving belt-type pre-reduction roasting machine, the advantages of which are:

[0017] By incorporating a heat recovery structure, the heat generated by the material conveyed from the top of the belt conveyor can be drawn into the heat storage tank via an air suction fan. The absorbed heat is then transported to the front end of the roasting machine via a gas delivery box. The hot air is used to preheat the combustion air entering the roasting machine, thereby improving combustion efficiency and reducing fuel consumption. This device enables the easy recovery and utilization of heat, enhancing the environmental friendliness of the energy-saving belt pre-reduction roasting machine during use.

[0018] By incorporating a waste heat recovery structure, the waste heat from the high-temperature flue gas at the top of the roasting machine can be directly recovered and utilized through the waste heat recovery pipe. The waste heat from the high-temperature flue gas is used to generate steam, which can be used in other production processes within the plant, such as material drying and heating, or generated by a steam turbine. This achieves cascaded energy utilization, improves the overall thermal efficiency of the entire system, and enables cascaded energy utilization. This makes the device easy to save energy and improves the environmental friendliness of the energy-saving belt pre-reduction roasting machine during use.

[0019] Equipped with heating components and a gas detection structure, the heating components are located on both sides of the top and bottom of the roasting machine body, ensuring uniform heating of the material and avoiding localized overheating or underheating. Zoned control of the heating components can accommodate complex roasting processes. The heating components utilize low-NOx burners, optimizing the combustion process to fundamentally reduce the generation of nitrogen oxides, meeting stringent environmental standards. A flame limiting tube ensures combustion stability and safety. Valves control the opening and closing of the gas receiving pipes, which are evenly distributed inside the roasting machine body, facilitating gas detection at different locations within the machine. This design achieves convenient heating and gas detection, improving the efficiency and convenience of this energy-saving belt-type pre-reduction roasting machine during use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;

[0022] Figure 3 This is a three-dimensional structural schematic diagram of the main cross-section of this utility model;

[0023] Figure 4 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0024] Figure 5 This is a top-view cross-sectional three-dimensional structural diagram of the present invention.

[0025] The following are the annotations in the diagram: 1. Calcination machine body; 2. Waste heat recovery structure; 21. Waste heat recovery box; 22. Connecting pipe; 23. Waste heat recovery pipe; 3. Hot gas recovery structure; 31. Support; 32. Gas delivery box; 33. Hot gas storage box; 34. Suction fan; 4. Belt conveyor; 5. Heating component; 51. Fuel pipe; 52. Flame limiting pipe; 53. Nozzle; 6. Gas detection structure; 61. Main pipe; 62. Gas receiving pipe; 63. Valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5The present invention provides an energy-saving belt pre-reduction roasting machine, which includes a roasting machine body 1.

[0028] Reference Figures 1-4 The top of the roasting machine body 1 is fixed with a waste heat recovery structure 2. The waste heat recovery structure 2 includes a waste heat recovery box 21, a connecting pipe 22 and a waste heat recovery pipe 23. The waste heat recovery box 21 is fixed to the top of the roasting machine body 1. A connecting pipe 22 is fixed to one side of the top of the waste heat recovery box 21. A waste heat recovery pipe 23 is fixed to one side of the bottom of the waste heat recovery box 21. The bottom end of the waste heat recovery pipe 23 extends into the interior of the roasting machine body 1. A belt conveyor 4 passes through the bottom of the roasting machine body 1.

[0029] Under natural convection, the high-temperature flue gas inside the roasting machine body 1 enters the waste heat recovery box 21 from the top of the roasting machine body 1 through the waste heat recovery pipe 23. The high-temperature flue gas flows inside the waste heat recovery box 21, transferring heat through the pipe wall of the waste heat recovery pipe 23 to the cold water inside the waste heat recovery box 21, thereby raising the temperature of the cold water. The heated medium is discharged outward from the connecting pipe 22 for preheating materials, producing steam, etc., thereby realizing the recovery and utilization of heat.

[0030] Reference Figures 1-4 A heat recovery structure 3 is provided on one side of the roasting machine body 1. The heat recovery structure 3 includes a support 31 provided on one side of the roasting machine body 1. A heat storage box 33 is fixed on the inner wall of the top of the support 31. A suction fan 34 is fixed on both sides of the bottom of the heat storage box 33. A gas delivery box 32 is fixed on one side of the heat storage box 33. The end of the gas delivery box 32 away from the support 31 extends into the interior of the roasting machine body 1. The suction fans 34 are symmetrically distributed on both sides of the heat storage box 33.

[0031] When the external power supply is connected, the suction fan 34 is started to draw in air, creating a negative pressure inside the bracket 31. The hot air from a specific area inside the bracket 31 is drawn into the hot air storage box 33 through the suction fan 34, and then transported back to the front end of the roasting machine body 1 through the air delivery box 32 to preheat the combustion air.

[0032] Reference Figures 2-5Heating components 5 are uniformly fixed on the inner wall of the roasting machine body 1. The heating components 5 include fuel pipes 51, flame limiting pipes 52, and nozzles 53. Fuel pipes 51 are uniformly fixed on the inner walls of the bottom two sides and the top two sides of the roasting machine body 1. Flame limiting pipes 52 are uniformly fixed on one side of the fuel pipes 51, and nozzles 53 are fixed to one end of each flame limiting pipe 52. One end of the fuel pipe 51 is connected to a low-NOx burner. The fuel pipes 51 are symmetrically distributed on both sides of the roasting machine body 1. The flame limiting pipes 52 are uniformly fixed on the inner wall of the roasting machine body 1. Gas detection structures 6 are fixed at equal intervals on one side of the pipes 51. Gas detection structures 6 are fixed at the middle position of the top and the middle position of the bottom of the roasting machine body 1. Gas detection structures 6 include a main pipe 61, a gas receiving pipe 62 and a valve 63. The main pipe 61 is fixed on both sides inside the roasting machine body 1. Gas receiving pipes 62 are evenly fixed on one side of the main pipe 61. Valves 63 are fixed inside the gas receiving pipes 62. A gas detector is connected to one end of the main pipe 61. Gas receiving pipes 62 are evenly distributed on one side of the main pipe 61.

[0033] An external low-NOx burner mixes fuel and air in a precise ratio and delivers the mixture through fuel pipe 51. The mixed gas is then ejected from nozzle 53 and ignited. Flame confinement pipe 52 encloses the flame, stabilizing its shape, preventing flameout, and concentrating heat towards the material. Heating components 5 are evenly and symmetrically arranged on both sides and bottom of the furnace body, enabling independent temperature control along the conveying direction. By adjusting the gas and air flow rates of each burner zone, the temperature of each process section can be precisely controlled. Multiple gas receiving pipes 62, located at the top and bottom center of the roasting machine body 1, collect atmosphere samples from different points inside the furnace. The collected gas is collected through gas receiving pipes 62 and fed into a main pipe 61. Valves 63 control the on / off state of each sampling point for selective detection or maintenance. The main pipe 61 guides the gas samples to an external gas detector. The gas detector analyzes the composition of the furnace atmosphere in real time and feeds the data back to the control system. The control system then automatically adjusts the air-fuel ratio and heat recovery / injection rate of the burner to optimize the roasting process and reducing atmosphere.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving belt-type pre-reduction roasting machine, comprising a roasting machine body (1); Its features are: The top of the roasting machine body (1) is fixed with a waste heat recovery structure (2), and the bottom of the roasting machine body (1) is penetrated by a belt conveyor (4). A heat recovery structure (3) is provided on one side of the roasting machine body (1). The heat recovery structure (3) includes a bracket (31) provided on one side of the roasting machine body (1). A heat storage box (33) is fixed on the inner wall of the top of the bracket (31). A suction fan (34) is fixed on both sides of the bottom end of the heat storage box (33). A gas delivery box (32) is fixed on one side of the heat storage box (33). Heating components (5) are uniformly fixed on the inner wall of the roasting machine body (1), and gas detection structures (6) are fixed at the middle position of the top and the middle position of the bottom of the roasting machine body (1).

2. The energy-saving belt-type pre-reduction roasting machine according to claim 1, characterized in that: The waste heat recovery structure (2) includes a waste heat recovery box (21), a connecting pipe (22) and a waste heat recovery pipe (23). The waste heat recovery box (21) is fixed to the top of the roasting machine body (1). A connecting pipe (22) is fixed to one side of the top of the waste heat recovery box (21), and a waste heat recovery pipe (23) is fixed to one side of the bottom of the waste heat recovery box (21).

3. The energy saving belt type pre-reduction roaster according to claim 2, characterized in that: The bottom end of the waste heat recovery pipe (23) extends into the interior of the roasting machine body (1).

4. The energy-saving belt-type pre-reduction roasting machine according to claim 1, characterized in that: The gas delivery box (32) extends into the interior of the roasting machine body (1) at the end away from the support (31), and the suction fan (34) is symmetrically distributed on both sides of the hot gas storage box (33).

5. The energy-saving belt-type pre-reduction roasting machine according to claim 1, characterized in that: The heating assembly (5) includes a fuel pipe (51), a flame limiting pipe (52), and a nozzle (53). The fuel pipe (51) is uniformly fixed on the inner walls of the bottom two sides and the top two sides of the roasting machine body (1). A flame limiting pipe (52) is uniformly fixed on one side of the fuel pipe (51), and a nozzle (53) is fixed on one end of each flame limiting pipe (52).

6. The energy-saving belt-type pre-reduction roasting machine according to claim 5, characterized in that: One end of the fuel pipe (51) is connected to a low-NOx burner. The fuel pipe (51) is symmetrically distributed on both sides of the roasting machine body (1). The flame limiting pipe (52) is evenly distributed on one side of the fuel pipe (51).

7. The energy-saving belt-type pre-reduction roasting machine according to claim 1, characterized in that: The gas detection structure (6) includes a main pipe (61), a gas receiving pipe (62), and a valve (63). The main pipe (61) is fixed on both sides inside the roasting machine body (1). A gas receiving pipe (62) is evenly fixed on one side of the main pipe (61). A valve (63) is fixed inside the gas receiving pipe (62).

8. An energy-saving belt-type pre-reduction roasting machine according to claim 7, characterized in that: One end of each main pipe (61) is connected to a gas detector, and the gas receiving pipes (62) are evenly distributed on one side of the main pipe (61).

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