Circulating slaked lime aging system
The cyclic lime calcination system addresses the issue of incomplete digestion in lime production by employing a structured system with controlled discharge and mixing, resulting in enhanced fine powder yield and product quality.
Patent Information
- Application Number
- CN202422115813.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the existing lime digestion and production system, squeezing lime is insufficiently digested, the fine powder acquisition rate is low, the product moisture content is uneven, and the digestion time is long, resulting in a decline in the finished product quality.
The hydrated lime circulation aging system is adopted, including screw conveyors, elevators, scraper conveyors, pneumatic plug-in valves and air lockers, to realize the circulation aging of lime. Through the scraper conveyor stirring and screw conveyor stirring, the lime flow direction is controlled, and the high and low-level material level devices are automatically detected to ensure uniform digestion of lime.
It improves the digestion efficiency of lime, reduces digestion time, avoids lime clumping, ensures product quality and fine powder acquisition rate, and improves the specific surface area of the finished product.
Smart Images
Figure CN223102906U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of slaked lime processing, and particularly relates to a slaked lime circulating and aging system. Background Art
[0002] In the existing lime digestion production system, quicklime is quantitatively and evenly conveyed by a conveyor to a lime digester for digestion to produce slaked lime. Since the digestion time of quicklime in the digester is relatively short, there is still undigested quicklime in the slaked lime coming out of the lime digester. The current process is as follows: it is conveyed by a conveyor to a hoist and then by the hoist to an aging tank, and the lime is further digested in the aging tank. Its disadvantages are as follows: 1. The slaked lime filled in the aging tank generally self-differentiates into three sections: the lower section is mostly large-grained materials (overburned, underburned lime, and large lime grains that have not had time to be digested), and the water content of the lime in this section is relatively small, so it is not conducive to further digestion of the lime; the water content of the lime in the middle section is relatively moderate and the particle size is also relatively moderate; the particles in the upper section are relatively fine, but the water content of the lime is relatively high, which makes the lime prone to caking; thus, the lime digestion is incomplete, the fine powder yield is low, and the water content of the product is also uneven. 2. During the process of the lime in the aging tank from empty to full, it is not fully stirred or tumbled, so the lime in the tank requires a relatively long digestion time and the digestion is not sufficient. 3. When the lime in the aging tank is full, the pressure between the lime particles will increase, so a part of the expansion force generated during the digestion of the lime is reduced by the pressure between the lime particles, resulting in insufficient expansion of the lime during digestion and a decrease in the specific surface area of the finished slaked lime. Content of the Utility Model
[0003] To solve the above technical problems, the utility model provides a slaked lime circulating and aging system, which realizes the circulating and aging of lime, improves the fine powder yield, reduces the overall digestion time, fully digests, and ensures the product quality.
[0004] Specifically, the utility model discloses a slaked lime circulating and aging system, including:
[0005] A transportation device, including a first screw conveyor, which receives the digested slaked lime from the digester;
[0006] A transfer and lifting device, including a hoist for lifting the product;
[0007] An aging device, including an aging tank. The top of the aging tank is fed by the hoist, and a discharge port is arranged at the lower part. A valve is arranged at the discharge port. The valve is connected to the lower end of the hoist, and the valve is also connected to a conveying device, including a belt conveyor, which is arranged on the lower side of the aging device for transporting the aged finished product.
[0008] The advantages of adopting the above technical solution are as follows: realizing the cyclic aging of slaked lime, avoiding lime caking in the aging tank, reducing the overall digestion time, achieving full digestion, and ensuring the lime quality.
[0009] Further, a feed inlet is provided at the top of the aging tank, and the feed inlet is connected to a scraper conveyor. The feeding end of the scraper conveyor is connected to the upper end of the elevator, and the discharging end is connected to the feed inlet.
[0010] The advantages of adopting the above technical solution are as follows: after the elevator lifts the lime, it is stirred by the scraper conveyor to make the lime more uniform and reduce caking.
[0011] Further, a pneumatic slide valve and a gas lock are fixed to the lower side of the aging tank.
[0012] The advantages of adopting the above technical solution are as follows: the setting of the pneumatic slide valve controls the opening and closing of the discharging port at the bottom of the aging tank, and the setting of the gas lock can prevent gas from entering the aging tank, isolate air, and avoid carbonization.
[0013] Further, the valve is a two-way valve, and the two-way valve has a first discharging port and a second discharging port. The first discharging port is connected to the bottom of the elevator, and the second discharging port is connected to the belt conveyor.
[0014] The advantages of adopting the above technical solution are as follows: the setting of the two-way valve controls the flow direction of the lime in the aging tank. If re-aging is required, it discharges through the first discharging port, is lifted by the elevator and then enters the aging tank again for secondary aging. If the aging is completed, the second discharging port is opened for discharging, and the product enters the belt conveyor and is transported to the next processing equipment.
[0015] Further, a second screw conveyor is provided between the valve and the lifting device.
[0016] The advantages of adopting the above technical solution are as follows: the second screw conveyor can stir the material coming out of the first discharging port to make it evenly mixed before re-aging, ensuring the aging effect.
[0017] Further, the aging tank includes two aging tanks I and II arranged side by side, and both the aging tank I and the aging tank II are provided with a high-level material indicator and a low-level material indicator.
[0018] The advantages of adopting the above technical solution are as follows: the two aging tanks arranged side by side can improve the aging efficiency, and the high-level material indicator and the low-level material indicator can sense the internal material quantity to achieve automatic detection.
[0019] Further, the lower side of the scraper conveyor is connected to the aging tank through a pneumatic valve.
[0020] Further, a pulse dust collector is also provided at the top of the aging tank.
[0021] The advantage of adopting the above technical solution is that the gas generated during the digestion process is discharged after dust removal, avoiding environmental pollution.
[0022] Further, the belt conveyor is connected with a powder separator.
[0023] The advantage of adopting the above technical solution is that the slaked lime after digestion passes through the powder separator to separate and collect the lime powder after digestion, ensuring the quality and purity of the lime product. Description of the Drawings
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art.
[0025] Figure 1 is the overall structural schematic diagram of the slaked lime recycling and aging system of the present invention
[0026] Figure 2 is the connection schematic diagram of the slaked lime recycling and aging system of the present invention
[0027] The reference numerals involved in the drawings are as follows:
[0028] The first screw conveyor 1; the elevator 2; the pneumatic slide valve 10; the air lock 11; the valve 12; the second screw conveyor 13; the belt conveyor 14; the scraper conveyor 3; the pneumatic valve 4; the pulse dust collector 5; the high-level material level indicator 6; the first aging tank 7; the second aging tank 8; the low-level material level indicator 9. Detailed Embodiments
[0029] The following will further describe the present invention in detail with reference to the drawings.
[0030] As shown in the figure, the present invention discloses a slaked lime recycling and aging system, including:
[0031] A transportation device, including the first screw conveyor 1, which receives the slaked lime after digestion from the digester;
[0032] A transfer and lifting device, including the elevator 2, which is used to lift the product;
[0033] An aging device, including an aging tank. The top of the aging tank is fed by the elevator 2, and a discharge port is provided at the lower part. The discharge port is provided with the valve 12. The valve 12 is connected to the lower end of the elevator 2, and the valve 12 is also connected to a conveying device, including the belt conveyor 14, which is arranged on the lower side of the aging device and is used to transport the aged finished product.
[0034] The advantages of adopting the above technical solution are as follows: realizing the cyclic aging of slaked lime, avoiding lime caking in the aging tank, reducing the overall digestion time, ensuring sufficient digestion, and guaranteeing the quality.
[0035] In some embodiments, a feed inlet is provided at the top of the aging tank. The feed inlet is connected to a scraper conveyor 3. The feed end of the scraper conveyor 3 is connected to the upper end of the elevator 2, and the discharge end is connected to the feed inlet. The scraper conveyor 3 is located above the aging tank. After the elevator 2 lifts the lime, it is stirred by the scraper conveyor 3 to make the lime more uniform and reduce caking. A pulse dust collector 5 is also provided at the top of the aging tank.
[0036] The aging tank includes two aging tanks 7 and 8 arranged side by side. Both the aging tank 7 and the aging tank 8 are provided with a high-level indicator 6 and a low-level indicator 9. The scraper conveyor 3 is provided with two discharge ports to supply materials to the two aging tanks respectively.
[0037] The advantages of adopting the above technical solution are as follows: the two aging tanks arranged side by side can improve the aging efficiency, and the high-level indicator 6 and the low-level indicator 9 can sense the internal material quantity to achieve automatic detection.
[0038] In some embodiments, a pneumatic slide valve 10 and a gas lock 11 are fixed to the lower side of the aging tank. The pneumatic slide valve controls the opening and closing of the discharge port at the bottom of the aging tank, and the gas lock 11 can prevent gas from entering the aging tank, isolate the air, and avoid carbonization.
[0039] In some embodiments, the valve 12 is a two-way valve. The two-way valve has a first discharge port and a second discharge port. The first discharge port is connected to the bottom of the elevator 2, the second discharge port is connected to a belt conveyor 14, and the lower side of the scraper conveyor 3 is connected to the aging tank through a pneumatic valve 4.
[0040] The advantages of adopting the above technical solution are as follows: the two-way valve controls the flow direction of the lime in the aging tank. If re-aging is required, it discharges through the first discharge port, is lifted by the elevator 2 and then enters the aging tank again for secondary aging. If the aging is completed, the second discharge port is opened for discharging, and the product enters the belt conveyor 14 and is transported to the next processing equipment.
[0041] Furthermore, a second screw conveyor 13 is provided between the valve 12 and the lifting device. The second screw conveyor 13 has two inlets, which are docked with the first discharge port and the second discharge port of the two-way valve, and is internally provided with a spiral conveyor, and the outlet is docked with the elevator 2.
[0042] The advantages of adopting the above technical solution are as follows: the second screw conveyor 13 can stir the materials coming out of the first discharge port to make them evenly mixed before re-aging, ensuring the aging effect.
[0043] In some embodiments, a belt conveyor 14 is connected to a separator.
[0044] The advantage of adopting the above technical solution is that after digestion, the slaked lime is separated and collected by the separator to ensure the quality and purity of the lime product.
[0045] In the processing process, first, the slaked lime coming out of the digester → screw conveyor 1 → elevator 2 → scraper conveyor 3 → the pneumatic valve 4 of the aging tank 7 is opened, and at the same time, the pneumatic valve 4 of the aging tank 8 is closed; the slaked lime enters the aging tank 7 for further digestion. When the material level in the aging tank 7 reaches the low-level indicator 9, the low-level indicator 9 sends a signal, and the pneumatic slide valve 10 and air lock 11 of the aging tank 7 are opened. At the same time, the outlet 2 of the two-way valve leading to the screw conveyor 13 is opened (at this time, the three-dimensional outlet 1 of the two-way valve leading to the belt conveyor 14 is closed), and the slaked lime is transported to the elevator 2 → scraper conveyor 3 → aging tank 7 (this process is called "stockpiling reversal". During the "stockpiling reversal" process, the slaked lime is tumbled, which accelerates the further digestion of the slaked lime. At this time, the dryness, humidity and fineness of the lime in the tank are uniform, so the lime is further digested more fully; in addition, during the "stockpiling reversal" process of the lime in the aging tank, the lime stock in the tank is relatively small, and the pressure between the lime particles is relatively small, so that the lime is more likely to expand during digestion, resulting in the specific surface area of the finished slaked lime reaching the standard). When the aging tank 7 is full, the high-level indicator 6 sends a signal, the pneumatic valve 4 of the aging tank 7 is closed, and the outlet 1 of the two-way valve below the aging tank 7 leading to the outlet of the belt conveyor 14 is opened (at this time, the outlet leading to the screw conveyor 13 is closed), and the slaked lime is transported to the separator for powder selection through the belt conveyor 14; at the same time, the pneumatic valve 4 of the aging tank 8 is opened, and the slaked lime enters the aging tank 8 for further digestion. When the material level in the aging tank 8 reaches the low-level indicator 9, the low-level indicator 9 sends a signal, the pneumatic slide valve 10 and air lock 11 of the aging tank 8 are opened, and at the same time, the outlet of the two-way valve leading to the screw conveyor 13 is opened (at this time, the outlet leading to the belt conveyor 14 is closed), and the slaked lime is transported to the elevator 2 and then transported to the aging tank 8 through the scraper conveyor 3. When the aging tank 8 is full, the high-level indicator 6 sends a signal, the feeding pneumatic valve 4 of the aging tank 8 is closed, and the two-way valve below the aging tank 8 leading to the outlet of the belt conveyor 14 is opened (at this time, the outlet leading to the screw conveyor 13 is closed), and the slaked lime enters the separator for powder selection through the belt conveyor 14. This cycle is repeated to complete the full digestion of the slaked lime and ensure the processing quality.
[0046] For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several variations and improvements can be made, and these all belong to the protection scope of the present invention.
Claims
1. A hydrated lime cyclic aging system, characterized in that, Including: A transportation device, including a screw conveyor 1 (1), which receives the digested hydrated lime from the digester; A transfer and lifting device, including a hoist (2), which is used to lift the product; An aging device, including an aging tank. The top of the aging tank is fed by the hoist (2), and a discharge port is arranged at the lower part. A valve (12) is arranged at the discharge port. The valve (12) is connected to the lower end of the hoist (2), and the valve (12) is also connected to a conveying device, including a belt conveyor (14), which is arranged on the lower side of the aging device and is used to transport the aged finished product.
2. The slaked lime cyclic aging system according to claim 1, characterized in that, An inlet is arranged at the top of the aging tank, and a scraper conveyor (3) is connected to the inlet. The feeding end of the scraper conveyor (3) is connected to the upper end of the hoist (2), and the discharging end is connected to the inlet.
3. The slaked lime recycling and aging system according to claim 1, characterized in that, A pneumatic slide valve (10) and an air lock (11) are fixed on the lower side of the aging tank.
4. The hydrated lime circulation and aging system according to claim 1, wherein The valve (12) is a two-way valve, which has a first discharge port and a second discharge port. The first discharge port is connected to the bottom of the hoist (2), and the second discharge port is connected to the belt conveyor (14).
5. The slaked lime cyclic aging system according to claim 1, characterized in that, A screw conveyor 2 (13) is arranged between the valve (12) and the lifting device.
6. The slaked lime recycling and aging system according to claim 1, characterized in that, The aging tank includes two aging tanks arranged side by side, namely an aging tank 1 (7) and an aging tank 2 (8). High-level level indicators (6) and low-level level indicators (9) are arranged on both the aging tank 1 (7) and the aging tank 2 (8).
7. The slaked lime recycling and aging system according to claim 2, characterized in that, The lower side of the scraper conveyor (3) is connected to the aging tank through a pneumatic valve (4).
8. The slaked lime recycling and aging system according to claim 1, characterized in that A pulse dust collector (5) is also arranged at the top of the aging tank.
9. The hydrated lime recycling and aging system according to claim 1, wherein, The belt conveyor (14) is connected to a powder separator.