Highly active slag powder reactor

Abstract

The present application provides a high-activity slag powder reactor, which relates to the field of slag powder drying. It comprises a rectangular parallelepiped reaction chamber, wherein a horizontally arranged roller is disposed within the reaction chamber. A motor drives the roller to rotate around the axis of the roller. A notch is disposed on the outer wall of the roller, and a first porous plate is adapted to fit within the notch. A second porous plate is disposed within the reaction chamber and below the roller. An inlet pipe for sintering flue gas is disposed at the top of the reaction chamber, and a discharge pipe is disposed at the bottom of the reaction chamber. The inlet of the discharge pipe is located below the second porous plate. Slag powder is contained within the roller, and the slag powder passes through the first porous plate and remains on top of the second porous plate. The present application has the effect of reducing energy consumption during the slag powder drying process.

Description

Technical Field

[0001] The present application relates to the field of slag micropowder drying, and in particular to a high-activity slag micropowder reactor. Background Art

[0002] Slag powder is a powdered product obtained by ultrafine grinding water-quenched slag from iron-making blast furnaces. When added to cement or concrete in a specific proportion, ultrafine grinding significantly increases the density of the cement concrete while converting weak calcium hydroxide crystals into stronger calcium silicate hydrate gel, significantly improving the overall performance of concrete and cement products. Since the raw slag used to make slag powder is typically stored outdoors before grinding, its moisture content increases during rainy days. Therefore, the slag powder must be dried after grinding to prevent it from agglomerating when mixed with concrete.

[0003] At present, the common practice for drying slag powder is to use high-temperature gas heating drying or electric heating drying to dry slag powder with high water content.

[0004] However, this method consumes a lot of energy, and during the drying process, a lot of energy is lost and wasted through heat radiation. Summary of the Invention

[0005] In order to improve the problem of large energy loss during the drying process of slag micropowder, the present application provides a high-activity slag micropowder reactor.

[0006] The high-activity slag powder reactor provided in this application adopts the following technical solutions:

[0007] A high-activity slag powder reactor comprises a rectangular reaction chamber, wherein a horizontally arranged roller is provided in the reaction chamber, and an electric motor drives the roller to rotate around the axis of the roller. A notch is provided on the outer wall of the roller, and a first porous plate is adaptively provided in the notch; a second porous plate is provided in the reaction chamber and below the roller; an air inlet pipe for sintering flue gas is provided at the top of the reaction chamber, and a discharge pipe is provided at the bottom of the reaction chamber, and the inlet of the discharge pipe is located below the second porous plate; the roller is filled with slag powder, and the slag powder passes through the first porous plate and stays on the top of the second porous plate.

[0008] By adopting the above technical solution, the slag powder to be dried is placed in the drum, and driven by the motor, it rotates with the drum. When the first porous plate rotates to the bottom of the reaction chamber, some of the slag powder will pass through the first porous plate and fall downward, and finally accumulate on the top of the second porous plate. While the slag powder rotates and falls downward, the sintering flue gas with a higher temperature enters the reaction chamber from the air inlet pipe. Part of it will pass through the gap between the outer wall of the drum and the inner wall of the reaction chamber, and in the process of downward circulation, it will contact the slag powder leaked from the drum, thereby drying the slag powder outside the drum. Another part will pass through the opening of the first porous plate and enter the reaction chamber when the first porous plate rotates to the top of the reaction chamber. In the process of the drum rolling, it fully contacts with the slag powder inside the drum, and realizes the drying effect of the slag powder inside the drum. That is to say, the slag powder in the drum increases the contact area with the sintering flue gas through its own rolling action, thereby improving the drying effect per unit time. In the process of the slag powder leaking out of the drum falling down in the reaction chamber, this part of the slag powder is in a more dispersed state, which can further increase the contact area between the single slag powder particles and the sintering flue gas, and the drying effect is significantly improved. Since the sintering flue gas is the waste gas that needs to be treated, the slag powder is dried by the heat of the sintering flue gas, which reduces or even does not require the intervention of external energy, effectively improving the energy utilization rate. Moreover, SO2 and NO in the sintering flue gas x It can react with CaO in slag powder to produce physical adsorbent chemical reaction, thereby achieving desulfurization and denitrification in sintering flue gas. By utilizing the heat of sintering flue gas, it can dry the slag powder, reduce energy consumption, and reduce the operating cost of desulfurization and denitrification of sintering flue gas.

[0009] Preferably, the outer diameter of the slag powder is smaller than the inner diameter of the opening of the first porous plate, and the outer diameter of the slag powder is larger than the inner diameter of the opening of the second porous plate.

[0010] By adopting the above technical solution, it is ensured that the slag micropowder rolls in the drum, is fully in contact with the sintering flue gas, and can then pass through the first porous plate and float downward, and the dispersion of a certain amount of slag micropowder is improved in the falling process, thereby increasing the contact area with the sintering flue gas and improving the drying efficiency; the inner diameter of the opening of the second porous plate is small, and the slag micropowder cannot pass through, so the dried slag micropowder can be collected, while the sintering flue gas can pass through the slag micropowder and the second porous plate and be discharged to the outside of the reaction chamber through the discharge pipe, and in the process of the sintering flue gas passing through the slag micropowder, the slag micropowder can be dried again.

[0011] Preferably, the drum is cylindrical, the axis of the drum extends in the horizontal direction, and both sides of the drum are close to the inner side of the reaction chamber.

[0012] By adopting the above technical solution, the drum can rotate reliably along the axis of the drum under the drive of the electric motor, thereby improving the mixing and drying effect of the slag fine powder and the sintering flue gas in the drum, and by adjusting the distance between the two sides of the drum and the inner wall of the reaction chamber, the flow rate of the sintering flue gas directly entering the bottom of the drum can be adjusted, ensuring that the sintering flue gas can enter the drum while also flowing directly to the bottom of the drum, thereby improving the drying effect of the slag fine powder.

[0013] Preferably, one side of the drum is connected to the inner wall of the reaction chamber via a roller, the motor is arranged on the outer wall of the reaction chamber, and the output shaft of the motor penetrates into the interior of the reaction chamber and is connected to the other side of the drum.

[0014] By adopting the above technical solution, the roller plays a role in supporting the drum, ensuring that the drum can rotate reliably.

[0015] Preferably, the second porous plate includes a left plate and a right plate, one side of the left plate and one side of the right plate are hinged to the inner wall of the reaction chamber; a hydraulic rod is provided at the bottom of the left plate and the bottom of the right plate, and the hydraulic rod pushes the left plate or the right plate to rotate around the hinge point.

[0016] By adopting the above technical solution, the hydraulic rod and the inner wall of the reaction chamber, the hydraulic rod and the left plate, and the hydraulic rod and the right plate are all in a hinged state. In this way, when the hydraulic rod is retracted, the left plate or the right plate can be driven to swing downward around the hinge point, and when the hydraulic rod is extended, the left plate or the right plate can be driven to swing upward around the hinge point; before the drum rotates, the hydraulic rod moves, so that the left plate and the right plate are in a horizontal state, which is convenient for intercepting the leaked slag powder after the drum rotates. After all the slag powder in the drum is accumulated on the second porous plate, When the drying process is completed, the input of sintering flue gas is stopped, and the hydraulic rod moves again, causing the left plate or the right plate to swing downward. In this way, the other side of the left plate and the other side of the right plate will separate from each other and form a gap, and the slag powder above will fall down from the gap and be discharged through the discharge pipe; further, when there is too much slag powder accumulated on the second porous plate and they are squeezed together into a tight state and cannot fall from the gap, the hydraulic rod drives the left plate or the right plate to swing upward, thereby disturbing the slag powder and promoting the flow of the slag powder.

[0017] Preferably, the other side of the left plate and the other side of the right plate are both provided with elastic strips. When the left plate and the right plate are both in a horizontal state, a pair of elastic strips squeeze each other and generate elastic deformation.

[0018] By adopting the above technical solution, when the left plate and the right plate are rotated to a horizontal state, the gap between the two can be filled with an elastic strip, effectively preventing the slag micropowder from passing through the gap between the left plate and the right plate during the drying process of the slag micropowder, resulting in a reduction in the accumulation effect of the slag micropowder on the top of the second porous plate, and thus being unable to achieve the drying effect of the accumulated slag micropowder during the process of the sintering flue gas passing through the second porous plate.

[0019] Preferably, a collecting hopper is provided on the top of the discharge pipe, and the collecting hopper is located below the pair of elastic strips and extends along the length direction of the elastic strips.

[0020] By adopting the above technical solution, the collecting hopper is in the shape of a long strip, which can receive the slag powder leaking from between the left plate and the right plate to the greatest extent, so that all the dried slag powder can be discharged from the reaction chamber through the discharge pipe and packaged.

[0021] Preferably, a valve is provided at the bottom of the discharge pipe, and the discharge pipe is also connected to a bronchus. The connection between one end of the bronchus and the discharge pipe is located outside the reaction chamber and above the valve. The other end of the bronchus is connected to a vacuum device, which draws the gas in the bronchus outward.

[0022] By adopting the above technical solution, when in the drying state, the valve is closed and the exhaust equipment is working, so that the gas in the discharge pipe can be extracted through the bronchial pipe, so that a negative pressure will be generated at the top of the discharge pipe, which is convenient for the sintering flue gas to pass through the accumulated slag powder and the second porous plate and be discharged through the bronchial pipe. Moreover, when the first porous plate is in a state facing the bottom of the reaction chamber, the exhaust action of the exhaust equipment can promote the sintering flue gas in the drum to be discharged from the drum, and then when the first porous plate is rotated to face the top of the reaction chamber, new sintering flue gas can enter the drum again, thereby increasing the flow rate of the sintering flue gas in the reaction chamber; after the drying is completed, the exhaust equipment stops exhausting, the valve is opened, the two hydraulic rods are actuated, the left plate and the right plate are opened, and the slag powder can enter the discharge pipe through the collecting hopper; further, in order to prevent the slag powder from entering the bronchial pipe during the process of falling in the discharge pipe, the part of the bronchial pipe close to the discharge pipe can be lifted upward or the exhaust equipment can supply air to the bronchial pipe in reverse, thereby forming an air sealing effect in the bronchial pipe.

[0023] Preferably, a receiving groove is provided on the inner wall of one side of the drum, a cover plate is adaptively provided in the receiving groove, and the cover plate is connected to the bottom of the receiving groove by a number of springs; one side of the drum is also provided with a through hole connected to the receiving groove, and a through hole is provided on the outer wall of the reaction chamber, and when the notch faces the top of the reaction chamber, the through hole and the through hole are in a coaxial state; a feeding pipe is provided on the outside of the reaction chamber, and one end of the feeding pipe passes through the through hole and the through hole in sequence and extends to the interior of the drum, and the slag powder is transported to the drum through the feeding pipe.

[0024] By adopting the above technical solution, when the drum rotates and is in the drying process, the feed pipe is away from the perforation, and the cover plate stays in the receiving groove and closes the receiving groove under the limiting action of the spring. After all the slag powder in the rotating drum is rotated out and drying is completed, the perforation and the through hole are made coaxial by activating the motor, and then the feed pipe is moved toward the inside of the reaction chamber, so that the feed pipe passes through the through hole and the perforation and pushes the cover plate, so that the sealing effect of the cover plate on the receiving groove is released. In this way, after the feed pipe enters the interior of the drum, the new slag powder to be dried can be transported into the drum. After the slag powder in the drum is replenished, the feed pipe is pulled out, and the cover plate is reset under the action of the spring and the receiving groove is re-sealed to prevent the slag powder from leaking from the receiving groove and the perforation position during the rotation of the drum.

[0025] Preferably, the feed pipe is inserted into or pulled out of the drum by manual or hydraulic cylinder drive.

[0026] By adopting the above technical solution, the feed pipe can be driven reliably to ensure that the feed pipe can be inserted into the interior of the drum to achieve the replenishment of slag powder; further, in order to facilitate the transportation of slag powder, an auger can be installed in the feed pipe, and an opening is provided at the lower side of one end of the feed pipe located inside the drum to ensure that the slag powder can fall from the feed pipe into the drum.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. The slag powder in the drum increases the contact area with the sintering flue gas through its own rolling action, thereby improving the drying effect per unit time. The slag powder leaking from the drum is in a more dispersed state during the process of falling downward in the reaction chamber, which can further increase the contact area between single slag powder particles and sintering flue gas, and significantly improve the drying effect.

[0029] 2. SO2 and NO in sintering flue gas x It can react with CaO in slag powder to produce physical adsorbent chemical reaction, thereby achieving desulfurization and denitrification in sintering flue gas. By utilizing the heat of sintering flue gas, it can dry the slag powder, reduce energy consumption, and reduce the operating cost of desulfurization and denitrification of sintering flue gas.

[0030] 3. By setting a bronchial pipe on the discharge pipe and cooperating with the exhaust equipment and valve, the discharge pipe can collect the slag powder after drying and discharge the sintering flue gas after desulfurization and denitrification. The structure is more compact and reasonable, which promotes the flow of sintering flue gas in the reaction chamber and improves the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic perspective view of the present application;

[0032] Figure 2 is a schematic top view of the present application;

[0033] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the cutting line AA in FIG.

[0034] Figure 4 yes Figure 3 Schematic partial enlarged view at B in the middle;

[0035] Figure 5 is a schematic perspective view of the drum;

[0036] In the figure: 1. Reaction chamber; 11. Air inlet pipe; 12. Discharge pipe; 121. Valve; 122. Bronchus; 13. Through hole; 14. Feed pipe; 2. Roller; 21. Notch; 22. Roller; 23. Motor; 24. Receiving groove; 25. Cover plate; 26. Spring; 27. Perforation; 3. First porous plate; 4. Second porous plate; 41. Left plate; 42. Right plate; 43. Elastic strip; 5. Hydraulic rod; 6. Collecting hopper. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-5 This application is described in further detail.

[0038] Figure 1 is a schematic three-dimensional diagram of this application. Figure 1 The high-activity slag powder reactor includes a rectangular reaction chamber 1, a sintering flue gas inlet pipe 11 is provided on the top of the reaction chamber 1, a discharge pipe 12 is provided on the bottom of the reaction chamber 1, and the inlet of the discharge pipe 12 is located below the second porous plate 4. Figure 2 is a schematic top view of the present application, Figure 3 It is along Figure 2 Schematic cross-sectional view taken along the cutting line AA in FIG. Figure 2 and Figure 3A horizontally arranged cylindrical roller 2 is provided in the reaction chamber 1. Slag powder is contained in the roller 2. The slag powder passes through the first porous plate 3 and stays on the top of the second porous plate 4. After the sintering flue gas with a higher temperature enters the reaction chamber 1, a part of it will flow directly to the bottom of the roller 2 and come into contact with the slag powder leaking out of the first porous plate 3 on the roller 2 to achieve a drying effect. Another part will pass through the first porous plate 3 and enter the roller 2 and come into contact with the slag powder rolling in the roller 2 to achieve a drying effect. After the slag powder leaks out of the roller 2 and accumulates on the second porous plate 4, the sintering flue gas will contact and pass through the layered slag powder again in the process of passing through the second porous plate 4, which plays a further drying role. The drying effect can be achieved by the heat of the sintering flue gas itself, without the input of external energy, which effectively reduces energy loss. At the same time, the sintering flue gas also achieves its own desulfurization and denitrification in the process of drying the slag powder.

[0039] Figure 4 yes Figure 3 Schematic partial enlarged view at B in the middle, Figure 5 2 is a schematic perspective view of the drum 2. Figure 4 and Figure 5 The drum 2 is driven by a motor 23 and rotates around the axis of the drum 2. A notch 21 is provided on the outer wall of the drum 2. A first porous plate 3 through which slag powder can pass is adapted to be provided in the notch 21. The outer wall of the first porous plate 3 matches the outer surface of the drum 2. A receiving groove 24 is provided on the inner wall of one side of the drum 2. A cover plate 25 connected by a spring 26 is adapted to be provided in the receiving groove 24. A through hole 27 communicating with the receiving groove 24 is also provided on one side of the drum 2. A through hole 13 is provided on the outer wall of the reaction chamber 1. During the rotation of the drum 2, the through hole 27 and the through hole 13 can be in a coaxial state. A feeding pipe 14 is provided on the outside of the reaction chamber 1. One end of the feeding pipe 14 passes through the through hole 13 and the through hole 27 in sequence and extends to the interior of the drum 2. The slag powder is transported to the drum 2 through the feeding pipe 14. When all the slag powder in the drum 2 is accumulated on the second porous plate 4, the drying is completed, the sintering flue gas is stopped, and the feeding pipe 14 is pushed into the drum 2. New slag powder to be dried can be added to the drum 2 through the feeding pipe 14. It is convenient and quick, and there is no need to disassemble the reaction chamber 1 or the drum 2.

[0040] A second porous plate 4, through which the slag powder cannot pass, is located within the reaction chamber 1 and below the drum 2. The second porous plate 4 comprises a left plate 41 and a right plate 42. A hydraulic rod 5 is located at the bottom of each of the left and right plates 41, 42. The hydraulic rod 5 drives the left and right plates 41, 42, to rotate about their hinge points with the inner wall of the reaction chamber 1. An elastic strip 43 is located between the other side of the left plate 41 and the other side of the right plate 42. When the left and right plates 41, 42 are both horizontal, the pair of elastic strips 43 squeeze each other, producing elastic deformation. To ensure reliable rotation and horizontal rotation of the left and right plates 41, 42, a gap must exist between them. The elastic strip 43 fills this gap without affecting the rotation of the right and right plates 42. Furthermore, by driving the left and right plates 41, 42 in different directions and angles, the two hydraulic rods 5 promote the flow of the dried slag powder into the discharge pipe 12.

[0041] A collection hopper 6 is provided at the top of the discharge pipe 12. The collection hopper 6 is located below a pair of elastic strips 43 and extends along the length of the elastic strips 43. A valve 121 is provided at the bottom of the discharge pipe 12. A bronchial tube 122 is also connected to the discharge pipe 12. One end of the bronchial tube 122 is connected to the discharge pipe 12 at a point outside the reaction chamber 1 and above the valve 121. The other end of the bronchial tube 122 is connected to an exhaust device that extracts the gas in the bronchial tube 122. The collection hopper 6 is long and can receive the slag powder that leaks from between the left and right plates 41 and 42 to the greatest extent possible, allowing the dried slag powder to be discharged from the reaction chamber 1 through the discharge pipe 12 and packaged. When the exhaust device is in operation, the valve 121 is closed, which can promote the downward flow of sintering flue gas and improve the drying effect. After drying is completed, the exhaust device is closed and the valve 121 is opened to collect the dried slag powder.

[0042] The working principle of the present application is as follows: the slag micropowder in the drum 2 increases the contact area with the sintering flue gas through its own rolling action, thereby improving the drying effect per unit time. The slag micropowder leaking out of the drum 2 is in a more dispersed state during the process of falling downward in the reaction chamber 1, which can further increase the contact area between the single slag micropowder particles and the sintering flue gas. Moreover, in the process of the sintering flue gas being drawn out through the bronchial pipe 122, the sintering flue gas will pass through the layered slag micropowder for drying again, significantly improving the drying effect and drying efficiency.

[0043] Moreover, SO2 and NOx in the sintering flue gas can undergo physical adsorbent chemical reaction with CaO in the slag powder, thereby achieving desulfurization and denitrification in the sintering flue gas. By utilizing the heat of the sintering flue gas itself to dry the slag powder, it reduces energy consumption and reduces the operating cost of desulfurization and denitrification of the sintering flue gas.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. High activity slag powder reactor, characterized in that, The invention comprises a rectangular parallelepiped reaction chamber (1), wherein a horizontally arranged roller (2) is provided in the reaction chamber (1), a motor (23) drives the roller (2) to rotate around the axis of the roller (2), a notch (21) is provided on the outer wall of the roller (2), and a first porous plate (3) is adaptively provided in the notch (21); A second porous plate (4) is provided in the reaction chamber (1) and below the roller (2); An air inlet pipe (11) for sintering flue gas is provided at the top of the reaction chamber (1), and a discharge pipe (12) is provided at the bottom of the reaction chamber (1). The inlet of the discharge pipe (12) is located below the second porous plate (4). Slag powder is contained in the roller (2), and the slag powder passes through the first porous plate (3) and stays on the top of the second porous plate (4).

2. The high-activity slag powder reactor according to claim 1, characterized in that: The outer diameter of the slag fine powder is smaller than the inner diameter of the opening of the first porous plate (3), and the outer diameter of the slag fine powder is larger than the inner diameter of the opening of the second porous plate (4).

3. The high-activity slag powder reactor according to claim 1, characterized in that: The roller (2) is cylindrical, the axis of the roller (2) extends in the horizontal direction, and both sides of the roller (2) are close to the inner side of the reaction chamber (1).

4. The high-activity slag powder reactor according to claim 3, characterized in that: One side of the roller (2) is connected to the inner wall of the reaction chamber (1) via a roller (22); the motor (23) is arranged on the outer wall of the reaction chamber (1); the output shaft of the motor (23) penetrates into the interior of the reaction chamber (1) and is connected to the other side of the roller (2).

5. The high-activity slag powder reactor according to claim 1, characterized in that: The second porous plate (4) comprises a left plate (41) and a right plate (42), one side of the left plate (41) and one side of the right plate (42) are both hinged to the inner wall of the reaction chamber (1); A hydraulic rod (5) is provided at the bottom of the left side plate (41) and the bottom of the right side plate (42). The hydraulic rod (5) pushes the left side plate (41) or the right side plate (42) to rotate around the hinge point.

6. The high-activity slag powder reactor according to claim 5, characterized in that: The other side of the left side plate (41) and the other side of the right side plate (42) are both provided with elastic strips (43). When the left side plate (41) and the right side plate (42) are both in a horizontal state, a pair of elastic strips (43) squeeze each other and generate elastic deformation.

7. The high-activity slag powder reactor according to claim 5, characterized in that: A collecting hopper (6) is provided on the top of the discharge pipe (12). The collecting hopper (6) is located below a pair of elastic strips (43) and extends along the length direction of the elastic strips (43).

8. The high-activity slag powder reactor according to claim 7, characterized in that: A valve (121) is provided at the bottom of the discharge pipe (12), and a bronchial tube (122) is also connected to the discharge pipe (12). The connection between one end of the bronchial tube (122) and the discharge pipe (12) is located outside the reaction chamber (1) and above the valve (121). The other end of the bronchial tube (122) is connected to an exhaust device, and the exhaust device extracts the gas in the bronchial tube (122) outward.

9. The high-activity slag powder reactor according to claim 1, characterized in that: A receiving groove (24) is provided on an inner wall of one side of the drum (2), a cover plate (25) is adaptively provided in the receiving groove (24), and the cover plate (25) is connected to the bottom of the receiving groove (24) via a plurality of springs (26); A through hole (27) communicating with the receiving groove (24) is further provided on one side of the drum (2); a through hole (13) is provided on the outer wall of the reaction chamber (1); when the notch (21) faces the top of the reaction chamber (1), the through hole (13) and the through hole (27) are in a coaxial state; A feed pipe (14) is provided on the outside of the reaction chamber (1), one end of the feed pipe (14) passes through the through hole (13) and the perforation (27) in sequence and extends to the interior of the drum (2), and the slag powder is transported into the drum (2) through the feed pipe (14).

10. The high-activity slag powder reactor according to claim 9, characterized in that: The feed pipe (14) is inserted into or pulled out of the roller (2) by manual or hydraulic cylinder driving.

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