Dry-process lime slaking premixing device
By setting up a premixing device before the dry lime digestion unit, and utilizing a multi-stage stirring paddle and cooling water system, the problem of upstream heat transfer in the digestion reaction was solved, achieving efficient mixing of digestion aids and full utilization of water, thereby reducing the amount of digestion aids used and production costs.
Patent Information
- Application Number
- CN202422988063.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing digestion equipment mainly adopts integrated multi-stage digestion devices. In the first-stage digestion device, the heat of reaction after the digestion reaction begins will be transferred upstream, which will accelerate the upstream reaction rate and weaken the effect of digestion aids in inhibiting the reaction. This forces an increase in the consumption of digestion aids and increases production costs.
A dry lime digestion premixing device is set up before the traditional dry lime digestion device. The digestion aid aqueous solution and lime are fully mixed and homogeneous in the premixing device before entering the subsequent digestion device. By setting up multi-stage stirring paddles and conical spiral blades in the premixing device, the digestion aid and lime are ensured to be fully mixed. The feedback effect of reaction heat is suppressed by the cooling water system, thereby reducing the amount of digestion aid used.
While ensuring digestion quality, the amount of digestion aids used can be significantly reduced, water utilization can be improved, the moisture content of quicklime products can be reduced, and production costs can be decreased.
Smart Images
Figure CN223654806U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to dry method lime digestion technical field, concretely relates to a dry method lime digestion premixing device. BACKGROUND
[0002] Control digestion reaction progress, the traditional dry method lime digestion process adopts the digestion scheme of phased water supplement, but a large amount of digestion reaction heat is easy to make the moisture of lime digestion middle and later period vaporize and evaporate, and it is difficult to realize the uniform mixing of water and lime in the later period, and it is more impossible to make water deeply penetrate into the lime pore. The digestion reaction speed of this kind is slower, and the activity degree of slaked lime produced by digestion is low. Although increasing the water-cement ratio is beneficial to enhancing the water absorption of lime, excessive water will reduce the digestion speed, increase the moisture content of slaked lime, and increase the drying energy consumption and cost of the later period product.
[0003] By adding digestion aids in the digestion water to inhibit the digestion reaction speed, the water-cement mixing time can be increased without increasing the water-cement ratio, the diffusion and penetration of water to lime can be increased, and the digestion quality can be improved. At present, the digestion equipment mainly adopts an integrated multi-stage digestion device. In the first stage digestion device, the reaction heat after the start of the digestion reaction will be transferred to the upstream, causing the upstream reaction speed to accelerate, and the reaction inhibition effect of the digestion aid to weaken, thereby being forced to increase the consumption of the digestion aid and increase the production cost.
[0004] Therefore, the present application provides a dry method lime digestion premixing device to solve the above problems. CONTENT OF THE UTILITY MODEL
[0005] The technical problem to be solved by the utility model: the existing digestion equipment mainly adopts an integrated multi-stage digestion device. In the first stage digestion device, the reaction heat after the start of the digestion reaction will be transferred to the upstream, causing the upstream reaction speed to accelerate, and the reaction inhibition effect of the digestion aid to weaken, thereby being forced to increase the consumption of the digestion aid and increase the production cost.
[0006] The utility model provides the following technical scheme: a dry method lime digestion premixing device, including shell body, inner shell and rotor, the shell body is fixed, the shell body both ends are installed with front end cover and rear end cover and install inner shell in the shell body, the inner shell includes front section U type inner shell, bottom diameter variable U type inner shell rear section U type inner shell, the rotor is installed in the shell body inside, the rotor and the semicircular cylinder of inner shell lower part are coaxial; the both ends of the rotor are respectively passed through the shaft hole of front end end cover and the shaft hole of rear end end cover;The front section of the rotor is equipped with multistage stirring paddle, and each stirring paddle includes a paddle and a paddle rod;The paddle is installed at the top end of the paddle rod, and the bottom end of the paddle rod is inserted through the rotor and is fixedly connected with the rotor.
[0007] Preferably, the lower part of the front and rear U-shaped inner shell is a semi-cylindrical cylinder, and the lower part of the bottom variable-diameter U-shaped inner shell is a semi-circular truncated cone cylinder; the rear end of the front U-shaped inner shell is connected with the front end of the bottom variable-diameter U-shaped inner shell, and the front end of the rear U-shaped inner shell is connected with the rear end of the bottom variable-diameter U-shaped inner shell; the lower semi-cylindrical cylinder of the front and rear U-shaped inner shell is coaxial with the lower semi-circular truncated cone cylinder of the bottom variable-diameter U-shaped inner shell.
[0008] Preferably, the axial spacing of each blade rod of the multi-stage stirring paddle is greater than the maximum width of the blade, and the adjacent stirring paddles are uniformly arranged in a circumferential intersection, and the included angle between the adjacent paddles in the circumferential direction is between 90 degrees and 120 degrees.
[0009] Preferably, the multi-stage stirring paddle corresponds to the front U-shaped inner shell in the axial position, and the front end of the multi-stage stirring paddle is spaced apart from the front cover by 10-20 mm, and the rear end of the multi-stage stirring paddle is spaced apart from the rear end of the front U-shaped inner shell by more than 10 mm.
[0010] Preferably, the middle section of the rotor is provided with a conical spiral blade, the taper of the conical spiral blade is the same as the taper of the bottom variable-diameter U-shaped inner shell, and the axial position corresponds, the front end of the conical spiral blade is aligned with the front end of the bottom variable-diameter U-shaped inner shell, and the rear end of the conical spiral blade is also aligned with the rear end of the bottom variable-diameter U-shaped inner shell.
[0011] Preferably, the bottom of the outer shell is provided with a discharge port; the top of the outer shell is provided with a top cover, and the top cover is provided with a discharge port.
[0012] Preferably, the bottom of the outer shell 1 is provided with a cooling water inlet, and the upper side of the outer shell 1 is provided with a cooling water outlet.
[0013] The beneficial effects of the present application are as follows:
[0014] 1. The present application sets up a dry method lime digestion premixing device in front of a traditional dry method lime digestion device, so that the digestion aid aqueous solution and lime are fully mixed and uniformly distributed in the premixing device before rapid digestion reaction, and then enter the rear digestion device; under the premise of ensuring the final digestion quality, the use amount of digestion aid can be significantly reduced. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.
[0016] Fig. 1 It is the internal schematic view of the utility model;
[0017] Fig. 2 It is the side view of the utility model.
[0018] In the figure: 1, outer shell; 2, front section U-shaped inner shell; 3, bottom variable-diameter U-shaped inner shell; 4, rear section U-shaped inner shell; 5, discharge port; 6, conical spiral blade; 7, paddle; 8, paddle rod; 9, rotor; 10, feed inlet; 11, front end cover; 12, cooling water inlet; 13, rear end cover; 14, top cover; 15, cooling water outlet. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. Therefore, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the claimed utility model, but only represents some embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0020] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0021] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the invention is usually placed. Such terms are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0022] It should also be noted that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0023] The embodiments of the present disclosure aim to solve the problem that the existing digestion equipment mainly adopts an integrated multi-stage digestion device, and in the first stage digestion device, the reaction heat after the start of the digestion reaction will be transferred to the upstream, causing the reaction speed of the upstream to accelerate, and the effect of the digestion aid on inhibiting the reaction to weaken, thereby being forced to increase the consumption of the digestion aid and increase the production cost. In view of this, the embodiments of the present disclosure provide a dry method lime digestion premixing device, which is provided in front of a traditional dry method lime digestion device, so that the digestion aid aqueous solution and the lime are fully mixed and uniformly mixed in the premixing device, and then enter the subsequent digestion device before the rapid digestion reaction; the use amount of the digestion aid can be significantly reduced under the premise of guaranteeing the final digestion quality.
[0024] As shown in Figs. 1-2 A dry method lime digestion premixing device, which comprises an outer shell 1, an inner shell and a rotor 9, the outer shell 1 is fixed, front end cover 11 and rear end cover 13 are installed at both ends of the outer shell 1, and an inner shell is installed in the outer shell 1, the inner shell comprises a front section U-shaped inner shell 2, a bottom variable-diameter U-shaped inner shell 3 and a rear section U-shaped inner shell 4, the rotor 9 is installed inside the outer shell 1, and the rotor 9 is coaxial with the semicylinder at the lower part of the inner shell; the two ends of the rotor 9 respectively pass through the shaft holes of the front end cover and the rear end cover; a plurality of stirring paddles are arranged at the front section of the rotor 9, each stirring paddle comprises a paddle blade 7 and a paddle blade rod 8; the paddle blade 7 is installed at the top end of the paddle blade rod 8, and the bottom end of the paddle blade rod 8 penetrates through the rotor 9 and is fixedly connected with the rotor 9;
[0025] The digestion aid aqueous solution and the lime material enter the inside of the digestion premixing device through the feeding port 10, are stirred and mixed by the stirring paddles on the rotating rotor 9, and gradually move to the rear end under the pushing of the paddle blades 7, the lime is basically uniformly mixed with water, absorbs most of the required moisture, and then enters the conical spiral blade 6, is pushed to the discharge port 5 by the conical spiral blade 6, flows out of the digestion premixing device, and enters the subsequent digestion device to complete the digestion of the lime. The outlet end of the bottom variable-diameter U-shaped inner shell 3 is higher than the inlet end, so that the water cannot flow out of the digestion premixing device before being fully mixed with the lime, thereby improving the utilization rate of water and reducing the water content of the quicklime product;
[0026] The digestion aid aqueous solution and the lime are fully mixed and uniformly mixed in the premixing device, and then enter the subsequent digestion device before the rapid digestion reaction; the use amount of the digestion aid can be significantly reduced under the premise of guaranteeing the final digestion quality.
[0027] As shown in Figs. 1-2As shown, the lower parts of the front U-shaped inner shell 2 and the rear U-shaped inner shell 4 are semi-cylindrical cylinders, and the lower part of the bottom variable-diameter U-shaped inner shell 3 is a frustum-shaped cylinder; the rear end of the front U-shaped inner shell 2 is connected to the front end of the bottom variable-diameter U-shaped inner shell 3, and the front end of the rear U-shaped inner shell 4 is connected to the rear end of the bottom variable-diameter U-shaped inner shell 3; the lower semi-cylindrical cylinders of the front U-shaped inner shell 2 and the rear U-shaped inner shell 4 are coaxial with the lower frustum-shaped cylinder of the bottom variable-diameter U-shaped inner shell 3;
[0028] like Figs. 1-2 As shown, the axial spacing of each blade 8 of the multi-stage agitator is greater than the maximum width of the blade 7. Adjacent agitators are evenly arranged in a circumferential cross, and the included angle between adjacent blades in the circumferential direction is between 90 degrees and 120 degrees. The multi-stage agitator corresponds to the front U-shaped inner shell 2 in axial position. There is a gap of 10-20 mm between the front end of the multi-stage agitator and the front cover 11, and the distance between the rear end of the multi-stage agitator and the rear end of the front U-shaped inner shell 2 is greater than 10 mm.
[0029] The stirring paddle can change the axial angle between the blade surface of the blade 7 and the axis of the rotor 9 by rotating the blade rod 8. The angle between the blade surface of the blade 7 and the axis is adjustable from 10 degrees to 80 degrees. Decreasing this angle can increase the stirring intensity of the material in the premixing device; conversely, increasing this angle can decrease the stirring intensity of the material in the premixing device. This angle is also related to the mixing residence time of the material in the premixing device. The shortest residence time corresponds to a certain angle (related to the material properties). Conversely, deviating from this angle, whether increasing or decreasing the angle, will prolong the residence time of the material.
[0030] like Figs. 1-2 As shown, the rotor 9 is provided with a conical spiral blade 6 in the middle section. The taper of the conical spiral blade 6 is the same as the taper of the bottom variable diameter U-shaped inner shell 3, and their positions correspond along the axial direction. The front end of the conical spiral blade 6 is aligned with the front end of the bottom variable diameter U-shaped inner shell 3, and the rear end of the conical spiral blade 6 is also aligned with the rear end of the bottom variable diameter U-shaped inner shell 3.
[0031] The rotor 9 is driven by a variable speed device. Adjusting the operating speed of the rotor 9 can adjust the material processing load of the digestion premixing device, and can also adjust the intensity and time of material mixing according to the material properties. Increasing the operating speed of the rotor 9 can speed up the stirring and accelerate the axial movement speed of the material, reducing the residence time of the material in the digestion premixing device. Adjusting the operating speed of the rotor 9 can be coordinated with adjusting the axial angle between the blade surface of the paddle 7 and the axis of the rotor 9.
[0032] A front bearing assembly and a coupling are installed on the front end shaft of rotor 9 (both the bearing assembly and the coupling are conventional setups and not shown in the diagram). The front bearing assembly bears the radial and axial forces applied by rotor 9, and the coupling connects to the drive unit. A rear bearing assembly is installed on the rear end shaft of rotor 9. The rear bearing assembly mainly supports rotor 9 and mainly bears the radial force.
[0033] like Figs. 1-2 As shown, the bottom of the outer shell 1 is provided with a discharge port 5; the top of the outer shell 1 is provided with a top cover 14, and the top cover 14 is provided with a discharge port 5; the bottom of the outer shell 1 is provided with a cooling water inlet 12, and the upper side of the outer shell 1 is provided with a cooling water outlet 15.
[0034] During operation of the digestion premixing unit, cooling water enters the cooling water chamber through cooling water inlet 12, carrying away some of the heat from the initial digestion reaction transmitted from the inner shell, and then flows out through cooling water outlet 15. The cooling water system in the digestion premixing unit avoids the positive feedback effect of exothermic reactions in the initial digestion phase, inhibits the continuous acceleration of the reaction, reduces the amount of digestion aids used, and improves premixing time and efficiency.
[0035] The overall working process is as follows: When the digestion premixing unit is running, cooling water enters the cooling water chamber through cooling water inlet 12, carrying away some of the heat from the initial digestion reaction transmitted from the inner shell, and then flows out through cooling water outlet 15. The cooling water system in the digestion premixing unit can avoid the positive feedback effect of exothermic reactions in the initial digestion stage, inhibit the continuous acceleration of the reaction, reduce the amount of digestion aids used, and improve premixing time and efficiency.
[0036] After the pre-run, the digestion aid aqueous solution and lime material enter the digestion premixing device through the inlet 10. They are mixed by the stirring paddle on the rotating rotor 9 and gradually moved towards the rear end under the push of the blades 7. The lime is basically fully mixed with the water, and after absorbing most of the required water, it enters the conical spiral blade 6, which pushes it to the outlet 5, flowing out of the digestion premixing device and into the subsequent digestion device to complete the lime digestion. The outlet end of the bottom variable-diameter U-shaped inner shell 3 is higher than the inlet end, ensuring that water does not flow out of the digestion premixing device before being fully mixed with the lime, thereby improving water utilization and reducing the moisture content of the hydrated lime product.
[0037] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A dry lime slaking premixing device, characterized in that, The device includes an outer shell (1), an inner shell, and a rotor (9). The outer shell (1) is fixed. A front end cover (11) and a rear end cover (13) are installed at both ends of the outer shell (1). An inner shell is installed inside the outer shell (1). The inner shell includes a front U-shaped inner shell (2), a bottom variable diameter U-shaped inner shell (3), and a rear U-shaped inner shell (4). The rotor (9) is installed inside the outer shell (1). The rotor (9) is coaxial with the semi-cylindrical body at the bottom of the inner shell. The shafts at both ends of the rotor (9) pass through the shaft holes of the front end cover and the rear end cover, respectively. The front section of the rotor (9) is provided with a multi-stage stirring paddle. Each stirring paddle includes a blade (7) and a blade rod (8). The blade (7) is installed at the top of the blade rod (8). The bottom end of the blade rod (8) passes through the rotor (9) and is fixedly connected to the rotor (9).
2. The dry lime slaking premixing device according to claim 1, characterized in that: The lower part of the front U-shaped inner shell (2) and the rear U-shaped inner shell (4) is a semi-cylindrical cylinder, and the lower part of the bottom variable diameter U-shaped inner shell (3) is a semi-frustum-shaped cylinder; the rear end of the front U-shaped inner shell (2) is connected to the front end of the bottom variable diameter U-shaped inner shell (3), and the front end of the rear U-shaped inner shell (4) is connected to the rear end of the bottom variable diameter U-shaped inner shell (3); the lower semi-cylindrical cylinders of the front U-shaped inner shell (2) and the rear U-shaped inner shell (4) are coaxial with the lower semi-frustum-shaped cylinder of the bottom variable diameter U-shaped inner shell (3).
3. The dry lime slaking premixing device according to claim 2, characterized in that: The axial spacing of each blade rod (8) of the multi-stage agitator is greater than the maximum width of the blade (7), and adjacent agitators are evenly arranged in a circumferential cross, with the included angle between adjacent blades in the circumferential direction between 90 degrees and 120 degrees.
4. The dry lime slaking premixing device according to claim 3, characterized in that: The multi-stage stirring paddles are axially positioned to correspond to the front U-shaped inner shell (2). There is a gap of 10-20mm between the front end of the multi-stage stirring paddles and the front cover (11). The distance between the rear end of the multi-stage stirring paddles and the rear end of the front U-shaped inner shell (2) is greater than 10mm.
5. A dry lime slaking premixing device according to claim 4, characterized in that: The rotor (9) is provided with a conical spiral blade (6) in the middle section. The taper of the conical spiral blade (6) is the same as that of the bottom variable diameter U-shaped inner shell (3) and they are positioned in the same direction along the axial direction. The front end of the conical spiral blade (6) is aligned with the front end of the bottom variable diameter U-shaped inner shell (3), and the rear end of the conical spiral blade (6) is also aligned with the rear end of the bottom variable diameter U-shaped inner shell (3).
6. A dry lime slaking premixing device according to claim 5, characterized in that: The bottom of the outer shell (1) is provided with a discharge port (5); the top of the outer shell (1) is provided with a top cover (14), and the top cover (14) is provided with a discharge port (5).
7. A dry lime slaking premixing device according to claim 6, characterized in that: The bottom of the outer shell (1) is provided with a cooling water inlet (12), and the upper side of the outer shell (1) is provided with a cooling water outlet (15).