Calcium hydroxide multistage digester and method of use

Abstract

The application discloses a calcium hydroxide multistage digester and a use method thereof. The digester is provided with a feeding port, and a uniform feeding mechanism (1) is arranged at the feeding port. A bag opening mechanism is arranged at the feeding end of the uniform feeding mechanism (1). The bag opening mechanism comprises a feeding cylinder (2), a one-way mechanism (3) is arranged at the upper end of the feeding cylinder (2), blades (4) are arranged on the inner wall of the upper portion of the feeding cylinder (2) and fixed to the inner wall of the feeding cylinder (2), a rotating disc (5) is arranged below the blades (4), a motor (6) is connected to the lower portion of the rotating disc (5), and a plug rod (7) is arranged on the rotating disc (5). The digester has the advantages of no occupational diseases of workers, high utilization rate of raw materials, convenience in use and low failure rate.

Description

Technical Field

[0001] This invention belongs to the field of calcium hydroxide production equipment, and particularly relates to a multi-stage calcium hydroxide digester and its usage method. Background Technology

[0002] A multi-stage slaker (or simply slaker) is a piece of equipment used in the production of calcium hydroxide. Quicklime and water are added to the slaker, where the quicklime and water undergo a multi-stage slaker reaction, forming calcium hydroxide precipitate and a supernatant. For example, a multi-stage slaked lime slaker is described in application number 202011202865.8. Currently, quicklime purchased in factories is packaged in bags. Before adding the quicklime to the slaker's inlet, the bags must be broken and the quicklime poured out. During this process, a large amount of quicklime is thrown into the air, which not only seriously pollutes the workshop environment and causes occupational diseases among workers, but also wastes raw materials and results in low raw material utilization. Therefore, existing slakers have the drawbacks of causing occupational diseases among workers and low raw material utilization.

[0003] Its drawbacks. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage calcium hydroxide digester and its usage method. This invention has the advantages of preventing occupational diseases in workers, high raw material utilization, ease of use, and low failure rate.

[0005] The technical solution of the present invention: a multi-stage digester for calcium hydroxide, wherein the digester is provided with a feed inlet, a uniform feeding mechanism is provided at the feed inlet, and a bag opening mechanism is provided at the feed end of the uniform feeding mechanism;

[0006] The bag opening mechanism includes a feeding cylinder, a one-way mechanism at the upper end of the feeding cylinder, a blade on the inner wall of the upper part of the feeding cylinder, the blade being fixed to the inner wall of the feeding cylinder, a turntable below the blade, a motor at the bottom of the turntable, and an insert rod on the turntable.

[0007] In the aforementioned multi-stage calcium hydroxide digester, there are multiple blades, with the cutting edge of the blade located at the top of the blade, the cutting edge being inclined, and the upper end of the cutting edge being close to the axis of the feed cylinder.

[0008] In the aforementioned multi-stage calcium hydroxide digester, the top of the insert rod is a sharp end, the cross-section of the insert rod is cross-shaped, and the lower end of the insert rod is screwed to the turntable.

[0009] In the aforementioned multi-stage calcium hydroxide digester, the upper part of the insert rod is provided with triangular barbs.

[0010] In the aforementioned multi-stage calcium hydroxide digester, there are four barbs, which are located on the four side walls of the insert rod.

[0011] In the aforementioned multi-stage calcium hydroxide digester, the bottom of the turntable is provided with a toothed ring with internal teeth, and a gear is provided inside the toothed ring. The gear is connected to the turntable through multiple compression springs. A rubber plate is provided on the top surface of the gear, and a support plate fixed to the feed cylinder is provided below the gear. The motor is fixed to the bottom of the support plate, and the output end of the motor is fixed to the gear. Multiple through holes are provided on the support plate, and a plane bearing is provided between the gear and the support plate.

[0012] In the aforementioned multi-stage calcium hydroxide digester, the toothed ring is connected to the support plate via a corrugated pipe, and the multiple through holes are circumferentially distributed and all located within the corrugated pipe of the toothed ring.

[0013] In the aforementioned multi-stage calcium hydroxide digester, the feed cylinder is provided with a rotating door, which is located on one side of the insertion rod.

[0014] In the aforementioned multi-stage calcium hydroxide digester, the uniform feeding mechanism is a screw conveyor, and the unidirectional mechanism consists of two semi-circular rotating plates that merge into a complete circle. The rotating plates are connected to the inner wall of the feed cylinder via spring hinges.

[0015] The aforementioned method of using the calcium hydroxide multi-stage digester includes the following steps:

[0016] a. Feed the bagged quicklime into the feed cylinder from the top, start the motor, and the quicklime will enter the uniform feeding mechanism and be conveyed to the digester at a uniform speed. The bag will remain on the turntable.

[0017] b. Repeat step a several times, and after the last step a, turn off the motor, open the door, remove the plug on the turntable, take out the bag on the turntable, then put the plug back in and repeat step a.

[0018] Compared with existing technologies, this invention, based on existing multi-stage digesters, incorporates a uniform feeding mechanism at the inlet and a bag-opening mechanism at the inlet end of the uniform feeding mechanism. This bag-opening mechanism breaks open the bag of quicklime, and a motor-driven turntable rotates, generating centrifugal force to eject the quicklime from the bag, thus separating it from the quicklime. The entire separation process takes place within a relatively sealed feeding cylinder, preventing quicklime spillage and workshop pollution, protecting workers from occupational diseases, and achieving high raw material utilization. Furthermore, through structural optimization, this invention is also characterized by ease of use and low failure rate. Therefore, this invention offers the advantages of preventing occupational diseases in workers, high raw material utilization, ease of use, and low failure rate. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of the present invention.

[0020] Figure 2 This is a magnified front view of the present invention at the turntable.

[0021] Figure 3 This is a top view of the support plate.

[0022] Figure 4 This is a top view of the blade inside the feed cylinder.

[0023] Figure 5 This is a top view of a one-way mechanism.

[0024] The labels in the attached diagram are as follows: 1-Uniform feeding mechanism, 2-Feeding cylinder, 3-One-way mechanism, 4-Blade, 5-Turntable, 6-Motor, 7-Insertion rod, 8-Blade edge, 9-Barb, 10-Gear ring, 11-Gear, 12-Rubber plate, 13-Compression spring, 14-Support plate, 15-Through hole, 16-Side bearing, 17-Bellpipe, 18-Door body, 19-Multi-stage digester, 20-Spring hinge. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0026] Example. A multi-stage digester for calcium hydroxide, such as... Figure 1 As shown, a uniform feeding mechanism 1 is provided at the feed inlet of the existing multi-stage digester 19, and a bag opening mechanism is provided at the feed end of the uniform feeding mechanism 1.

[0027] The bag opening mechanism includes a feeding cylinder 2, a one-way mechanism 3 at the upper end of the feeding cylinder 2, a blade 4 on the inner wall of the upper part of the feeding cylinder 2, the blade 4 being fixed to the inner wall of the feeding cylinder 2, a turntable 5 below the blade 4, a motor 6 at the bottom of the turntable 5, and an insert rod 7 on the turntable 5.

[0028] There are multiple blades 4, and the cutting edge 8 of the blade 4 is located at the top of the blade 4. The cutting edge 8 is inclined and the upper end of the cutting edge 8 is close to the axis of the feed cylinder 2.

[0029] The top of the insertion rod 7 is a sharp end, the cross-section of the insertion rod 7 is cross-shaped, and the lower end of the insertion rod 7 is screwed to the turntable 5.

[0030] The upper part of the insertion rod 7 is provided with triangular barbs 9.

[0031] There are four barbs 9, which are located on the four side walls of the insert rod 7.

[0032] The bottom of the turntable 5 is provided with a toothed ring 10 with internal teeth. A gear 11 is provided inside the toothed ring 10. The gear 11 is slidably connected to the toothed ring 10 in the height direction. The gear 11 is connected to the turntable 5 through multiple compression springs 13. A rubber plate 12 is provided on the top surface of the gear 11. A support plate 14 fixed to the feed cylinder 2 is provided below the gear 11. The motor 6 is fixed to the bottom of the support plate 14. The output end of the motor 6 is fixed to the gear 11. Multiple through holes 15 are provided on the support plate 14. A plane bearing 16 is provided between the gear 11 and the support plate 14.

[0033] The gear ring 10 is connected to the support plate 14 through a corrugated tube 17 made of rubber. The multiple through holes 15 are distributed circumferentially and are all located in the corrugated tube 17 of the gear ring 10.

[0034] The feed cylinder 2 is provided with a rotating door 18, which is located on one side of the insertion rod 7.

[0035] The uniform feeding mechanism 1 is a screw conveyor, and the one-way mechanism 3 consists of two semi-circular rotating plates that merge into a complete circle. The rotating plates are connected to the inner wall of the feed cylinder 2 via spring hinges 20. When the spring hinges 20 are not under pressure, the rotating plates remain horizontal, keeping the one-way mechanism 3 in a sealed state.

[0036] The method of using the above-mentioned calcium hydroxide multi-stage digester includes the following steps:

[0037] a. The bagged quicklime is fed into the feed cylinder 2 from the top. Under gravity, the rotating plate rotates downwards, the one-way mechanism 3 opens, and after the bag passes through the one-way mechanism 3, the rotating plate returns to a horizontal state under the restoring force of the spring hinge 20. The one-way mechanism 3 closes, preventing dust from flying out of the feed cylinder 2. The bagged quicklime continues to fall. During the fall, the side wall of the bag is cut by the blade 4 and pierced by the insert 7. Finally, the bagged quicklime falls onto the turntable 5. At this time, the barbs 9 are located above the bagged quicklime. Under gravity, the turntable 5 descends, and the compression spring 13 provides cushioning. If the cushioning is insufficient, the turntable 5 continues to descend until it contacts the rubber plate 12, providing cushioning again. Start motor 6, which drives gear 11 to rotate. Gear 11 drives turntable 5 to rotate through gear ring 10. Turntable 5 drives bagged quicklime to rotate through insert rod 7. Under the action of centrifugal force, quicklime is thrown out and falls into uniform feeding mechanism 1 through through hole 15, and is sent to the existing multi-stage digester 19.

[0038] b. Repeat step a several times, and after the last step a, turn off motor 6, open door 18, remove the insert rod 7 from turntable 5, take out the bag from turntable 5, then reinstall insert rod 7, close door 18, and repeat step a. The multiple bags accumulated on insert rod 7 can be easily removed, making the invention convenient to use.

[0039] The barbs 9 prevent the bag of quicklime from detaching from the top of the insert rod 7. The insert rod 7 has a cross-shaped cross section, which allows the bag of quicklime to rotate with it, while also providing good torsional resistance, preventing bending and reducing the failure rate. The inclined blade 8 prevents the blade 4 from easily separating from the bag after hooking it, allowing for a larger opening in the bag for quicklime discharge. The corrugated tube 17 prevents quicklime from entering the flat bearing 16 and causing bearing jamming, thus reducing the failure rate.

Claims

1. A multi-stage digester for calcium hydroxide, wherein the digester is provided with a feed inlet, characterized in that: A uniform feeding mechanism (1) is provided at the feed inlet, and a bag opening mechanism is provided at the feed end of the uniform feeding mechanism (1); The bag opening mechanism includes a feeding cylinder (2), a one-way mechanism (3) is provided at the upper end of the feeding cylinder (2), a blade (4) is provided on the inner wall of the upper part of the feeding cylinder (2), the blade (4) is fixed to the inner wall of the feeding cylinder (2), a turntable (5) is provided below the blade (4), a motor (6) is connected to the lower part of the turntable (5), and a rod (7) is provided on the turntable (5). The bottom of the turntable (5) is provided with a gear ring (10) with internal teeth. The gear ring (10) is provided with a gear (11). The gear (11) is connected to the turntable (5) through multiple compression springs (13). The top surface of the gear (11) is provided with a rubber plate (12). The bottom of the gear (11) is provided with a support plate (14) fixed to the feed cylinder (2). The motor (6) is fixed to the bottom of the support plate (14). The output end of the motor (6) is fixed to the gear (11). The support plate (14) is provided with multiple through holes (15). A plane bearing (16) is provided between the gear (11) and the support plate (14). The gear ring (10) is connected to the support plate (14) through the bellows (17). The multiple through holes (15) are circumferentially distributed and are all located in the bellows (17) of the gear ring (10).

2. The multi-stage calcium hydroxide digester according to claim 1, characterized in that: There are multiple blades (4), and the cutting edge (8) of the blade (4) is located at the top of the blade (4). The cutting edge (8) is inclined and the upper end of the cutting edge (8) is close to the axis of the feed cylinder (2).

3. The multi-stage calcium hydroxide digester according to claim 1, characterized in that: The top of the insertion rod (7) is a sharp end, the cross section of the insertion rod (7) is cross-shaped, and the lower end of the insertion rod (7) is screwed to the turntable (5).

4. The multi-stage calcium hydroxide digester according to claim 3, characterized in that: The upper part of the insertion rod (7) is provided with triangular barbs (9).

5. The multi-stage calcium hydroxide digester according to claim 4, characterized in that: There are four barbs (9), and the four barbs (9) are located on the four side walls of the insert (7).

6. The multi-stage calcium hydroxide digester according to claim 1, characterized in that: The feed cylinder (2) is provided with a rotatingly connected door (18), which is located on one side of the insert rod (7).

7. The multi-stage calcium hydroxide digester according to claim 1, characterized in that: The uniform feeding mechanism (1) is a screw conveyor, and the one-way mechanism (3) consists of two semi-circular rotating plates that merge into a complete circle. The rotating plates are connected to the inner wall of the feed cylinder (2) via spring hinges (20).

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