A quicklime dosing device

Abstract

This utility model relates to the field of water treatment equipment technology, specifically to a quicklime dosing device, including a lime silo, a dust-free feeding station, a crushing mechanism, a high-speed conveyor, a transition silo, a quantitative conveyor, a dissolving tank, a stirring mechanism, and a control system. The dust-free feeding station includes a housing, a head, a centrifugal fan, and a filter cartridge. The crushing mechanism includes a reducer and a crushing motor. The output shaft of the reducer is connected to several stirring rods located inside the lime silo. At the bottom of the output shaft, there is an arch-breaking unloading component to prevent quicklime accumulation and promote quicklime unloading. The upper end of the dissolving tank is provided with a water inlet, a vent, and an overflow outlet. The bottom side wall of the dissolving tank is provided with a discharge outlet and a sewage outlet. This application ensures accurate feeding, and the ventilation outlet in the dissolving tank prevents water vapor backflow, avoids pipeline blockage, improves the dissolution efficiency of quicklime, and realizes dust-free feeding, accurate metering, efficient dissolution, and stable addition of quicklime.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, specifically to a quicklime dosing device. Background Technology

[0002] A quicklime (calcium hydroxide, Ca(OH)2) dosing device is a device used to quantitatively add quicklime solution to water bodies or process systems. It is widely used in water treatment, chemical industry, environmental protection and other fields, and is mainly used to adjust pH value, neutralize acidic wastewater, remove heavy metal ions, soften hard water, etc.

[0003] Traditional dry lime dosing systems typically employ a rotary feeder, using mechanical vibration and a screw conveyor to transport lime powder to the lime slurry solution tank. However, the large amount of water vapor generated during lime slurry preparation rises along the feeder to the bottom of the powder silo, easily clogging the discharge pipe and leading to significant lime metering errors. Furthermore, the mechanical vibration process generates considerable noise and fly ash, creating a harsh working environment. Additionally, the highly hygroscopic nature of quicklime powder makes it prone to clumping if not stored properly, necessitating regular cleaning of the storage silo. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a quicklime dosing device to solve the problem of easy blockage of pipelines.

[0005] To solve the above problems, the technical solution of this utility model is as follows: a quicklime dosing device includes a quicklime silo, a dust-free feeding station on the quicklime silo, a crushing mechanism for crushing lumpy quicklime inside the quicklime silo, a high-speed conveyor at the bottom outlet of the quicklime silo, a transition silo connected to the discharge end of the high-speed conveyor, a quantitative conveyor connected to the transition silo, a dissolving tank connected to the discharge end of the quantitative conveyor, a stirring mechanism inside the dissolving tank, and a control system.

[0006] Furthermore, the dust-free feeding station includes a box body, a head on the box body, a centrifugal fan on the head, and a filter cartridge inside the head.

[0007] Furthermore, the crushing mechanism includes a reducer located at the bottom of the lime silo and a crushing motor connected to the reducer. The output shaft of the reducer is connected to several stirring rods located inside the lime silo. At the bottom of the output shaft, there is an arch-breaking unloading component to prevent the accumulation of quicklime and promote the unloading of quicklime.

[0008] Furthermore, the arch-breaking and unloading assembly is a three-bladed stirring shaft.

[0009] Furthermore, the stirring mechanism includes a stirring motor located at the upper end of the dissolving tank, and the output end of the stirring motor is provided with stirring blades.

[0010] Furthermore, a level gauge is installed inside the lime silo.

[0011] Furthermore, the upper part of the dissolving tank is provided with a water inlet, a vent, and an overflow outlet, and the bottom side wall of the dissolving tank is provided with a discharge outlet and a sewage outlet.

[0012] Furthermore, a level gauge and a pH meter are installed inside the dissolving tank.

[0013] Compared with the prior art, this utility model has the following advantages: the high-speed conveyor, transition silo, and quantitative conveyor ensure accurate feeding; at the same time, the dissolving tank is equipped with a vent to prevent backflow of water vapor and avoid pipeline blockage; the crushing mechanism prevents quicklime from getting damp and clumping, thus improving the dissolution efficiency of quicklime; and the control system controls the coordinated operation of each component to achieve dust-free feeding, accurate metering, efficient dissolution, and stable addition of quicklime. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the interior of the lime silo of this utility model;

[0016] Figure 3 This is a schematic diagram of the dust-free feeding station structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the interior of the dissolving vessel of this utility model;

[0018] Figure 5 This is a schematic diagram of the appearance of the dissolving vessel of this utility model.

[0019] In the diagram: 1. Lime silo, 2. Dust-free feeding station, 201. Box body, 202. End cap, 203. Centrifugal fan, 204. Filter cartridge, 3. High-speed conveyor, 4. Transition silo, 5. Quantitative conveyor, 6. Dissolving tank, 601. Water inlet, 602. Ventilation outlet, 603. Overflow outlet, 604. Discharge outlet, 605. Sewage outlet, 7. Reducer, 8. Crushing motor, 9. Stirring rod, 10. Output shaft, 11. Three-blade stirring shaft, 12. Stirring motor, 13. Stirring blade. Detailed Implementation

[0020] like Figure 1 As shown, a quicklime dosing device includes a quicklime silo 1, a level gauge inside the quicklime silo 1, a dust-free feeding station 2 on the quicklime silo 1, a crushing mechanism for breaking up lumpy quicklime inside the quicklime silo 1, a high-speed conveyor 3 at the bottom outlet of the quicklime silo 1, a transition silo 4 connected to the discharge end of the high-speed conveyor 3, a quantitative conveyor 5 connected to the transition silo 4, a dissolving tank 6 connected to the discharge end of the quantitative conveyor 5, a stirring mechanism inside the dissolving tank 6, and a control system, which can be a PLC or a DCS.

[0021] like Figure 3 As shown, the dust-free feeding station 2 includes a box 201, a head 202 on the box 201, a centrifugal fan 203 on the head 202, and a filter cartridge 204 inside the head 202. One side opening of the box 201 is sealed to the quicklime feeder to reduce fly ash.

[0022] like Figure 2 As shown, the crushing mechanism includes a reducer 7 located at the bottom of the lime silo 1 and a crushing motor 8 connected to the reducer 7. The output shaft 10 of the reducer 7 is connected to several stirring rods 9 located inside the lime silo 1. At the bottom of the output shaft 10, there is an arch-breaking unloading component to prevent the accumulation of quicklime and promote the unloading of quicklime. The arch-breaking unloading component is a three-bladed stirring shaft 11. The crushing mechanism can use a flexible mixer to make the material feeding stable and uniform.

[0023] like Figure 4 , Figure 5 As shown, the stirring mechanism includes a stirring motor 12 located at the upper end of the dissolving tank 6, and a stirring blade 13 is provided at the output end of the stirring motor 12.

[0024] like Figure 5 As shown, the upper end of the dissolving tank 6 is provided with a water inlet 601, a vent 602, and an overflow outlet 603. The bottom side wall of the dissolving tank 6 is provided with a discharge outlet 604 and a drain outlet 605. A level gauge and a pH meter are provided inside the dissolving tank 6.

[0025] When using

[0026] I. Raw Material Storage and Pretreatment

[0027] Quicklime is conveyed to the dust-free feeding station 2 via a quicklime feeder. The housing 201 is sealed to the feeder. The centrifugal fan 203 operates to create negative pressure, causing air to circulate within the housing 201. Quicklime dust is intercepted by the filter cartridge 204, and clean air is discharged, thus achieving dust-free feeding and avoiding dust pollution. After commissioning, the quicklime enters the lime silo 1. The level gauge monitors the material height in the silo in real time and feeds the data back to the control system, facilitating inventory monitoring and timely replenishment of quicklime.

[0028] If quicklime clumps during storage, the crushing mechanism begins to function. The crushing motor 8 drives the reducer 7, which in turn rotates the output shaft 10 and the stirring rod 9 to crush the clumps of quicklime. At the same time, the three-bladed stirring shaft 11 (arch-breaking and unloading assembly) at the bottom of the output shaft 10 continuously stirs, breaking the material accumulation structure at the bottom of the lime silo, preventing the quicklime from forming an arch due to accumulation, thus hindering unloading and ensuring that the quicklime can be smoothly discharged from the bottom outlet of the silo.

[0029] II. Quantitative Delivery and Dissolution

[0030] The quicklime from the bottom outlet of the lime silo 1 is quickly conveyed to the transition silo 4 by the high-speed conveyor 3, which serves as a buffer and transfer mechanism. Subsequently, the quantitative conveyor 5 accurately conveys the quicklime in the transition silo 4 to the dissolving tank 6 according to the preset flow parameters, ensuring the accuracy of the dosage.

[0031] After the quicklime enters the dissolving tank 6, the stirring motor 12 drives the stirring blades 13 to rotate, thoroughly stirring and mixing the quicklime and water to accelerate the dissolution process of the quicklime. At the same time, clean water is injected into the water inlet 601 at the top of the dissolving tank 6 in proportion to prepare a solution of the required concentration with the quicklime. The vent 602 is used to maintain air circulation in the tank and prevent the accumulation of gas caused by stirring and other operations. The overflow port 603 discharges excess solution when the liquid level in the dissolving tank 6 is too high, ensuring the safe operation of the equipment.

[0032] III. Solution Storage and Dosing Control

[0033] The liquid level gauge in the dissolving tank 6 monitors the solution level in real time. When the liquid level is lower than the set value, the control system starts the quantitative conveyor 5 to replenish quicklime and opens the water inlet 601 to add water to maintain a stable solution volume. When the liquid level reaches the upper limit, feeding and water intake are stopped, and the stirring mechanism continues to operate to prevent solution sedimentation and ensure uniform solution concentration.

[0034] A pH meter is installed inside the dissolving tank 6 to measure the pH value of the solution in real time. Control parameters are set, such as target pH value (e.g., 9.0) and PID parameters (example: Kp=1.2, Ti=60s, Td=10s). The control system will automatically adjust the feeding of the quantitative conveyor 5 or the addition of water through the inlet 601 according to the pH value.

[0035] The discharge port 604 on the bottom side wall of the dissolving tank 6 is connected to the subsequent addition pipeline to transport the prepared quicklime solution to the target treatment stage, such as the wastewater treatment pond or the reaction vessel; the drain port 605 is used to periodically discharge the impurities and sediments deposited at the bottom of the dissolving tank 6 to ensure the quality of the solution. Throughout the process, the coordinated operation of various components enables dust-free feeding, accurate metering, efficient dissolution and stable addition of quicklime.

[0036] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A quicklime dosing device, comprising a quicklime silo (1), characterized in that: A dust-free feeding station (2) is provided on the lime silo (1). A crushing mechanism for breaking up lumpy quicklime is provided inside the lime silo (1). A high-speed conveyor (3) is provided at the bottom outlet of the lime silo (1). A transition silo (4) is connected to the discharge end of the high-speed conveyor (3). A quantitative conveyor (5) is connected to the discharge end of the quantitative conveyor (5). A dissolving tank (6) is connected to the discharge end of the quantitative conveyor (5). A stirring mechanism is provided inside the dissolving tank (6). A control system is also included.

2. The quicklime dosing device according to claim 1, characterized in that: The dust-free feeding station (2) includes a box (201), a head (202) is provided on the box (201), a centrifugal fan (203) is provided on the head (202), and a filter cartridge (204) is provided inside the head (202).

3. The quicklime dosing device according to claim 2, characterized in that: The crushing mechanism includes a reducer (7) located at the bottom of the lime silo (1) and a crushing motor (8) connected to the reducer (7). The output shaft (10) of the reducer (7) is connected to several stirring rods (9) located in the lime silo (1). At the bottom of the output shaft (10), there is an arch-breaking unloading component to prevent the accumulation of quicklime and promote the unloading of quicklime.

4. The quicklime dosing device according to claim 3, characterized in that: The arch-breaking and unloading assembly is a three-bladed stirring shaft (11).

5. The quicklime dosing device according to claim 4, characterized in that: The stirring mechanism includes a stirring motor (12) located at the upper end of the dissolving tank (6), and the output end of the stirring motor (12) is provided with stirring blades (13).

6. The quicklime dosing device according to claim 1, characterized in that: A level gauge is installed in the lime silo (1).

7. The quicklime dosing device according to claim 1, characterized in that: The upper end of the dissolving tank (6) is provided with a water inlet (601), a vent (602) and an overflow outlet (603), and the bottom side wall of the dissolving tank (6) is provided with a discharge outlet (604) and a sewage outlet (605).

8. The quicklime dosing device according to claim 1, characterized in that: A level gauge and a pH meter are installed inside the dissolving tank (6).

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