A circular structure redox reaction apparatus

Abstract

A kind of circular structure's oxidation-reduction reaction equipment, including circular cylinder, cover plate, bottom plate and air distribution plate;Cover plate and bottom plate are respectively fixed in the top and bottom of circular cylinder barrel mouth, air distribution plate is fixed in the inside of circular cylinder and is parallel with cover plate and bottom plate;The space in the inside of circular cylinder is divided into material chamber and gas chamber by air distribution plate, material chamber and gas chamber are located above and below air distribution plate respectively;Air distribution plate is equipped with several holes, reducing gas in gas chamber enters material chamber by hole;The center of cover plate is equipped with feed inlet, the middle part of the side circular cylinder wall of material chamber is equipped with discharge port;The middle and lower part of the side circular cylinder wall of gas chamber is equipped with gas inlet, the edge of cover plate is equipped with exhaust port;Material chamber is equipped with material chamber spiral baffle and is separated into spiral shape, spiral space is separated into multiple intercommunicating chambers by several material chamber baffles;Gas chamber is equipped with gas chamber spiral baffle and is separated into spiral shape, spiral space is separated into multiple independent chambers by several gas chamber baffles, and gas inlet is communicated with independent chamber.

Description

Technical Field

[0001] This invention belongs to the field of mineral production technology, and in particular relates to a circular redox reaction device. Background Technology

[0002] Currently, redox reaction tanks are required in many industries, especially in the suspension magnetization roasting technology used in iron ore production. In the existing suspension magnetization roasting technology, redox reaction tanks are usually connected in parallel, and both redox reaction tanks are rectangular in structure.

[0003] However, the use of a parallel rectangular structure redox reaction tank leads to the following three problems with the current suspension magnetization roasting technology:

[0004] First, the medium heated at high temperature in the main furnace cannot enter the two oxidation-reduction reaction tanks evenly, resulting in inconsistent feed rates between the two tanks. The feed rate unevenness ratio can reach up to 1:3, and the feed rate changes irregularly. This uneven feed rate is also known as feed imbalance. Feed imbalance will bring great difficulties to on-site operation, making it difficult to accurately and timely adjust the amount of reducing gas required for the oxidation-reduction reaction of the material, thus affecting the quality of the product. Since a certain amount of reducing gas is required for a certain material to carry out the oxidation-reduction reaction, this operation cannot be accurately achieved in the case of feed imbalance.

[0005] Secondly, compared with a single oxidation-reduction reactor, the current two oxidation-reduction reactors connected in parallel require an increase in investment cost of about 30%. If a single rectangular oxidation-reduction reactor is used, although the occurrence of material deviation can be avoided, its size will increase the footprint of the entire suspension magnetization roasting furnace, which will also increase investment cost.

[0006] Third, for the existing two oxidation-reduction reaction tanks connected in parallel, since the oxidation-reduction reaction tanks adopt a rectangular structure, after long-term operation at high temperatures, the equipment is prone to deformation and the welds are prone to cracking. The on-site maintenance cycle is long and frequent, which reduces the operating rate of the suspension magnetization roasting furnace. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a circular oxidation-reduction reaction device. Compared with the current parallel two oxidation-reduction reaction tanks, it can completely avoid material deviation, effectively improve the quality of the product after the reaction, and has the advantages of small footprint and low investment cost. Compared with the rectangular oxidation-reduction reaction tank, it has better mechanical properties, improves equipment deformation and weld cracking, shortens the on-site maintenance cycle and frequency, and further improves the operating rate of the suspension magnetized roasting furnace, thereby achieving the goal of stable operation of the suspension magnetized roasting furnace.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a circular oxidation-reduction reaction device, comprising a circular cylinder, a cover plate, a bottom plate, and an air distribution plate; the cover plate is fixedly installed at the top opening of the circular cylinder, the bottom plate is fixedly installed at the bottom opening of the circular cylinder, and the air distribution plate is fixedly installed inside the circular cylinder, with the air distribution plate distributed parallel to the cover plate and the bottom plate; the internal space of the circular cylinder is divided into a material chamber and a gas chamber by the air distribution plate, with the material chamber located above the air distribution plate and the gas chamber located below the air distribution plate; several holes are provided on the air distribution plate, and the reducing gas in the gas chamber enters the material chamber through the holes on the air distribution plate; a feed inlet is vertically provided at the center of the cover plate, and a discharge outlet is horizontally provided at the middle of the circular cylinder peripheral wall on the material chamber side; air inlets are provided at the lower middle part of the circular cylinder peripheral wall on the gas chamber side and at the middle of the bottom plate, and an exhaust outlet is provided at the edge of the cover plate.

[0009] The material chamber is provided with a spiral partition plate. The top edge of the spiral partition plate is fixedly connected to the lower surface of the cover plate, and the bottom edge of the spiral partition plate is fixedly connected to the upper surface of the air distribution plate. The inner vertical edge of the spiral partition plate is a free edge, and the outer vertical edge of the spiral partition plate is fixedly connected to the inner surface of the circumferential wall of the cylindrical body.

[0010] The spiral partition of the material chamber divides the internal space of the material chamber into a spiral shape. The inlet is connected to the innermost side of the spiral space inside the material chamber, and the outlet and exhaust port are both connected to the outermost side of the spiral space inside the material chamber.

[0011] Several baffles are distributed in the spiral space inside the material chamber. These baffles are divided into upper material chamber baffles and lower material chamber baffles according to their installation positions. The top edge of the upper material chamber baffle is fixedly connected to the lower surface of the cover plate, and the two vertical edges of the upper material chamber baffle are fixedly connected to the inner surface of the spiral partition or the cylindrical body of the material chamber. The bottom edge of the upper material chamber baffle is a free edge, and a gap is left between the bottom edge of the upper material chamber baffle and the air distribution plate. The bottom edge of the lower material chamber baffle is fixedly connected to the upper surface of the air distribution plate, and the two vertical edges of the lower material chamber baffle are fixedly connected to the inner surface of the spiral partition or the cylindrical body of the material chamber. The top edge of the lower material chamber baffle is a free edge, and a gap is left between the top edge of the lower material chamber baffle and the lower surface of the cover plate.

[0012] The upper and lower material chamber baffles are staggered in the spiral space inside the material chamber, and the upper material chamber baffle, as the starting baffle, is adjacent to the innermost side of the spiral space.

[0013] The air chamber is equipped with an air chamber spiral baffle. The top edge of the air chamber spiral baffle is fixedly connected to the lower surface of the air distribution plate, and the bottom edge of the air chamber spiral baffle is fixedly connected to the upper surface of the bottom plate. The inner vertical edge of the air chamber spiral baffle is a free edge, and the outer vertical edge of the air chamber spiral baffle is fixedly connected to the inner surface of the circumferential wall of the cylindrical body. The air chamber spiral baffle and the material chamber spiral baffle coincide in the vertical direction.

[0014] The spiral baffle divides the internal space of the air chamber into a spiral shape. Several air chamber baffles are distributed in the spiral space inside the air chamber. The lower surface of the air distribution plate on the top edge of the air chamber baffle is fixedly connected. The two vertical sides of the air chamber baffle are fixedly connected to the inner surface of the peripheral wall of the spiral baffle or the cylindrical body, respectively. The bottom edge of the air chamber baffle is fixedly connected to the upper surface of the bottom plate.

[0015] The number of air chamber baffles and material chamber baffles are the same and they overlap in the vertical direction. The spiral space inside the air chamber is divided into multiple independent cavities by the air chamber baffles, and each independent cavity is provided with an air inlet.

[0016] A maintenance discharge port is provided at the bottom of the circular cylindrical body on the side of the material chamber.

[0017] The beneficial effects of this invention are:

[0018] The circular oxidation-reduction reaction equipment of the present invention, compared with the existing two oxidation-reduction reaction tanks connected in parallel, can completely avoid the occurrence of material deviation, effectively improve the quality of the product after the reaction, and has the advantages of small footprint and low investment cost. Compared with the rectangular oxidation-reduction reaction tank, it has better mechanical properties, improves equipment deformation and weld cracking, shortens the on-site maintenance cycle and frequency, and further improves the operating rate of the suspension magnetized roasting furnace, thereby achieving the goal of stable operation of the suspension magnetized roasting furnace. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a circular redox reaction device according to the present invention;

[0020] Figure 2 for Figure 1 Sectional view of AA;

[0021] Figure 3 for Figure 1 BB section view;

[0022] Figure 4 for Figure 2 CC section view;

[0023] In the diagram, 1—circular cylinder, 2—cover plate, 3—bottom plate, 4—air distribution plate, 5—material chamber, 6—air chamber, 7—feed inlet, 8—discharge outlet, 9—air inlet, 10—exhaust outlet, 11—spiral baffle of material chamber, 12—upper material chamber baffle, 13—lower material chamber baffle, 14—spiral baffle of air chamber, 15—air chamber baffle, 16—maintenance discharge port. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-4 As shown, a circular oxidation-reduction reaction device includes a circular cylinder 1, a cover plate 2, a bottom plate 3, and an air distribution plate 4. The cover plate 2 is fixed to the top opening of the circular cylinder 1, the bottom plate 3 is fixed to the bottom opening of the circular cylinder 1, and the air distribution plate 4 is fixed inside the circular cylinder 1, distributed parallel to the cover plate 2 and the bottom plate 3. The internal space of the circular cylinder 1 is divided into a material chamber 5 and a gas chamber 6 by the air distribution plate 4. The material chamber 5 is located above the air distribution plate 4, and the gas chamber 6 is located below the air distribution plate 4. Several holes are provided on the air distribution plate 4, and the reducing gas in the gas chamber 6 enters the material chamber 5 through the holes on the air distribution plate 4. A feed inlet 7 is vertically provided at the center of the cover plate 2, and a discharge outlet 8 is horizontally provided at the middle of the peripheral wall of the circular cylinder 1 on the side of the material chamber 5. Air inlets 9 are provided at the lower middle part of the peripheral wall of the circular cylinder 1 on the side of the gas chamber 6 and at the middle of the bottom plate 3, and an exhaust outlet 10 is provided at the edge of the cover plate 2.

[0026] The material chamber 5 is provided with a material chamber spiral partition 11. The top edge of the material chamber spiral partition 11 is fixedly connected to the lower surface of the cover plate 2, the bottom edge of the material chamber spiral partition 11 is fixedly connected to the upper surface of the air distribution plate 4, the inner vertical edge of the material chamber spiral partition 11 is a free edge, and the outer vertical edge of the material chamber spiral partition 11 is fixedly connected to the inner surface of the peripheral wall of the cylindrical body 1.

[0027] The spiral partition 11 divides the internal space of the material chamber 5 into a spiral shape. The inlet 7 is connected to the innermost side of the spiral space inside the material chamber 5, and the outlet 8 and the exhaust port 10 are both connected to the outermost side of the spiral space inside the material chamber 5.

[0028] Several baffles are distributed in the spiral space inside the material chamber 5. These baffles are divided into upper material chamber baffles 12 and lower material chamber baffles 13 according to their installation positions. The top edge of the upper material chamber baffle 12 is fixedly connected to the lower surface of the cover plate 2. The two vertical edges of the upper material chamber baffle 12 are fixedly connected to the inner surface of the spiral partition 11 or the cylindrical body 1. The bottom edge of the upper material chamber baffle 12 is a free edge, and there is a gap between the bottom edge of the upper material chamber baffle 12 and the air distribution plate 4. The bottom edge of the lower material chamber baffle 13 is fixedly connected to the upper surface of the air distribution plate 4. The two vertical edges of the lower material chamber baffle 13 are fixedly connected to the inner surface of the spiral partition 11 or the cylindrical body 1. The top edge of the lower material chamber baffle 13 is a free edge, and there is a gap between the top edge of the lower material chamber baffle 13 and the lower surface of the cover plate 2.

[0029] The upper material chamber baffle 12 and the lower material chamber baffle 13 are staggered in the spiral space inside the material chamber 5, and the upper material chamber baffle 12 is adjacent to the innermost side of the spiral space as the starting baffle.

[0030] The air chamber 6 is provided with an air chamber spiral baffle 14. The top edge of the air chamber spiral baffle 14 is fixedly connected to the lower surface of the air distribution plate 4, and the bottom edge of the air chamber spiral baffle 14 is fixedly connected to the upper surface of the bottom plate 3. The inner vertical edge of the air chamber spiral baffle 14 is a free edge, and the outer vertical edge of the air chamber spiral baffle 14 is fixedly connected to the inner surface of the peripheral wall of the cylindrical body 1. The air chamber spiral baffle 14 and the material chamber spiral baffle 11 coincide in the vertical direction.

[0031] The spiral baffle 14 divides the internal space of the air chamber 6 into a spiral shape. Several air chamber baffles 15 are distributed in the spiral space inside the air chamber 6. The lower surface of the air distribution plate 4 is fixedly connected to the top edge of the air chamber baffle 15. The two vertical sides of the air chamber baffle 15 are fixedly connected to the inner surface of the peripheral wall of the spiral baffle 14 or the cylindrical body 1, respectively. The bottom edge of the air chamber baffle 15 is fixedly connected to the upper surface of the bottom plate 3.

[0032] The number of air chamber baffles 15 is the same as that of material chamber baffles and they overlap in the vertical direction. The spiral space inside the air chamber 6 is divided into multiple independent cavities by the air chamber baffles 15, and each independent cavity is provided with an air inlet 9.

[0033] A maintenance discharge port 16 is provided at the bottom of the circumferential wall of the cylindrical body 1 on the side of the material chamber 5.

[0034] The following describes a single use of the present invention with reference to the accompanying drawings:

[0035] In this embodiment, the cylindrical body 1, cover plate 2, bottom plate 3, air distribution plate 4, material chamber spiral partition 5, material chamber spiral partition 11, upper material chamber baffle 12, lower material chamber baffle 13, air chamber spiral partition 14, and air chamber baffle 15 are all made of heat-resistant material. The spiral space inside the material chamber 5 is divided into six interconnected cavities by the upper material chamber baffle 12 and the lower material chamber baffle 13. Adjacent cavities are connected only through the gap between the bottom edge of the upper material chamber baffle 12 and the air distribution plate 4 or the gap between the top edge of the lower material chamber baffle 13 and the lower surface of the cover plate 2. Similarly, the spiral space inside the air chamber 6 is divided into six completely independent cavities by the air chamber baffle 15. These independent cavities are not interconnected, and each independent cavity inside the air chamber 6 is only connected to the cavity inside the material chamber 5 directly above it through a hole in the air distribution plate 4. Specifically, the number of cavities formed by the spiral space inside the material chamber 5 and the gas chamber 6 can be determined based on the time required for the oxidation-reduction reaction of the material. The more cavities there are, the longer the oxidation-reduction reaction of the material will take.

[0036] First, the reducing gas enters each independent cavity inside the gas chamber 6 through each air inlet 9, and then enters the cavity inside the material chamber 5 directly above through the holes on the air distribution plate 4. Subsequently, the material enters the innermost cavity inside the material chamber 5 through the feed inlet 7 in the center of the cover plate 2. During the falling process, the material is blown up by the reducing gas blowing in from directly below and cannot fall. During this process, the material will come into full contact with the reducing gas, absorb the heat of the reducing gas and carry out an oxidation-reduction reaction.

[0037] The oxidation-reduction reaction of the material in the innermost first cavity of the material chamber 5 is a dynamic and continuous process. Driven by the reducing gas, the material enters the second cavity through the gap between the bottom edge of the upper baffle 12 and the air distribution plate 4. The oxidation-reduction reaction continues in the second cavity. Then, driven by the reducing gas, the material enters the third cavity through the gap between the top edge of the lower baffle 13 and the lower surface of the cover plate 2, and continues to carry out the oxidation-reduction reaction. This process continues until the material enters the sixth and last cavity under the drive of the reducing gas. The oxidation-reduction reaction is just completed in the sixth cavity.

[0038] After the material completes the oxidation-reduction reaction in the sixth cavity, the material will be discharged from the discharge port 8 and enter the next process, while the reducing gas will be discharged from the exhaust port 10 and enter the next process.

[0039] The solutions described in the embodiments are not intended to limit the scope of patent protection of this invention. All equivalent implementations or modifications that do not depart from the scope of this invention are included in the patent scope of this case.

Claims

1. A circular redox reaction apparatus, characterized in that: The system includes a cylindrical body, a cover plate, a bottom plate, and an air distribution plate. The cover plate is fixedly installed at the top opening of the cylindrical body, the bottom plate is fixedly installed at the bottom opening of the cylindrical body, and the air distribution plate is fixedly installed inside the cylindrical body, distributed parallel to the cover plate and the bottom plate. The internal space of the cylindrical body is divided into a material chamber and a gas chamber by the air distribution plate, with the material chamber located above the air distribution plate and the gas chamber located below the air distribution plate. Several holes are formed in the air distribution plate, and the reducing gas in the gas chamber enters the material chamber through the holes in the air distribution plate. A vertical feed inlet is provided in the center of the cylindrical body on the side of the material chamber, and a horizontal discharge outlet is provided in the middle of the circumferential wall of the cylindrical body on the side of the air chamber. Air inlets are provided in the lower middle part of the circumferential wall of the cylindrical body on the side of the air chamber and in the middle of the bottom plate. An exhaust outlet is provided at the edge of the cover plate. A spiral baffle is provided in the material chamber, with the top edge of the spiral baffle fixedly connected to the lower surface of the cover plate, and the bottom edge of the spiral baffle fixedly connected to the upper surface of the air distribution plate. The inner vertical edge of the spiral baffle is a free edge, and the outer vertical edge of the spiral baffle is connected to the circumferential wall of the cylindrical body. The inner surface of the wall is fixedly connected; the spiral partition of the material chamber divides the internal space of the material chamber into a spiral shape, the inlet is connected to the innermost side of the spiral space inside the material chamber, and the outlet and exhaust port are both connected to the outermost side of the spiral space inside the material chamber; several material chamber baffles are distributed in the spiral space inside the material chamber, and these baffles are divided into upper material chamber baffles and lower material chamber baffles according to their installation positions; the top edge of the upper material chamber baffle is fixedly connected to the lower surface of the cover plate, and the upper material chamber baffle... The two vertical sides are fixedly connected to the inner surface of the spiral partition or the cylindrical body of the material chamber. The bottom edge of the upper material chamber baffle is a free edge, and there is a gap between the bottom edge of the upper material chamber baffle and the air distribution plate. The bottom edge of the lower material chamber baffle is fixedly connected to the upper surface of the air distribution plate. The two vertical sides of the lower material chamber baffle are fixedly connected to the inner surface of the spiral partition or the cylindrical body of the material chamber. The top edge of the lower material chamber baffle is a free edge, and there is a gap between the top edge of the lower material chamber baffle and the lower surface of the cover plate.

2. The circular redox reaction apparatus according to claim 1, characterized in that: The upper and lower material chamber baffles are staggered in the spiral space inside the material chamber, and the upper material chamber baffle, as the starting baffle, is adjacent to the innermost side of the spiral space.

3. The circular redox reaction apparatus according to claim 2, characterized in that: The air chamber is equipped with an air chamber spiral baffle. The top edge of the air chamber spiral baffle is fixedly connected to the lower surface of the air distribution plate, and the bottom edge of the air chamber spiral baffle is fixedly connected to the upper surface of the bottom plate. The inner vertical edge of the air chamber spiral baffle is a free edge, and the outer vertical edge of the air chamber spiral baffle is fixedly connected to the inner surface of the circumferential wall of the cylindrical body. The air chamber spiral baffle and the material chamber spiral baffle coincide in the vertical direction.

4. The circular redox reaction apparatus according to claim 3, characterized in that: The spiral baffle divides the internal space of the air chamber into a spiral shape. Several air chamber baffles are distributed in the spiral space inside the air chamber. The lower surface of the air distribution plate on the top edge of the air chamber baffle is fixedly connected. The two vertical sides of the air chamber baffle are fixedly connected to the inner surface of the peripheral wall of the spiral baffle or the cylindrical body, respectively. The bottom edge of the air chamber baffle is fixedly connected to the upper surface of the bottom plate.

5. The circular redox reaction apparatus according to claim 4, characterized in that: The number of air chamber baffles and material chamber baffles are the same and they overlap in the vertical direction. The spiral space inside the air chamber is divided into multiple independent cavities by the air chamber baffles, and each independent cavity is provided with an air inlet.

6. The circular redox reaction apparatus according to claim 5, characterized in that: A maintenance discharge port is provided at the bottom of the circular cylindrical body on the side of the material chamber.

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