A continuous feeding device for lime milk

Abstract

The utility model relates to a lime milk continuous feeding device, including mounting bracket and set up on the storage jar, powder feeding assembly, liquid storage jar, spiral mixing pipeline and stirring output pipeline in mounting bracket, the bottom of storage jar is passed through powder feeding assembly and one end of spiral mixing pipeline intercommunication, the bottom of liquid storage jar and the middle pipeline of spiral mixing pipeline intercommunication, the bottom of liquid storage jar is provided with regulating valve and flowmeter, the other end of spiral mixing pipeline is communicated to in stirring output pipeline, stirring output pipeline is provided with the discharge gate, and the auger mechanism is rotatably arranged in stirring output pipeline. Can realize lime milk's fixed proportion mixing and continuous feeding, guarantee the consistency of feeding quality, in order to the uniformity of PH control, compared with traditional direct powder feeding mode, avoid the problem such as powder floating, agglomeration, deposition, significantly improve lime and target medium's reaction effect.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical waste utilization technology, specifically to a continuous lime slurry feeding device. Background Technology

[0002] Non-ferrous metal smelting processes generate large amounts of arsenic-containing solid waste such as slag, dust, and sludge. Improper handling can easily cause secondary pollution of water and soil. Current arsenic removal processes often use lime powder to adjust the pH of the system, causing arsenic to precipitate out as hydroxides, calcium arsenate, etc.

[0003] In existing processes, lime powder is often directly added to the reaction tank manually or via a conveying device to mix and react with the materials to be treated or the waste liquid. However, because lime powder is a loose granular solid with poor flowability, easy agglomeration, and difficulty in dispersion, when it is directly added to the reaction tank, it easily forms clumps in the liquid, making it difficult to disperse fully. This leads to a rapid increase in local pH while the reaction is slow in most areas, affecting the treatment efficiency and resulting in low utilization efficiency of the lime powder, failing to fully realize its intended reaction effect.

[0004] Therefore, it is necessary to study a continuous lime slurry feeding device. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a continuous lime slurry feeding device, which can effectively solve the problem of poor reaction effect caused by directly adding lime powder in the existing process.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A continuous lime slurry feeding device includes a mounting frame and a storage tank, a powder feeding component, a liquid storage tank, a spiral mixing pipe, and a stirring output pipe mounted on the mounting frame. The bottom of the storage tank is connected to one end of the spiral mixing pipe via a powder feeding assembly; The bottom of the storage tank is connected to the middle section of the spiral mixing pipe, and a regulating valve and a flow meter are installed at the bottom of the storage tank. The other end of the spiral mixing pipe is connected to the stirring output pipe; The mixing output pipe is equipped with a discharge port, and an auger mechanism is rotatably installed in the mixing output pipe.

[0007] Furthermore, the powder feeding assembly includes an ejector tube and a blower; The ejector tube is horizontally arranged, with a blower at one end and the other end connected to a spiral mixing pipe. The middle part of the ejector tube is connected to the bottom of the storage tank.

[0008] Furthermore, the spiral mixing pipe is provided with multiple inlets for communicating with the storage tank along its length, and the storage tank, regulating valve and flow meter are each provided with multiple sets.

[0009] Furthermore, it also includes a central rod, which is fixed to the mounting bracket, and the spiral mixing pipe is coiled and fixed on the central rod.

[0010] Furthermore, both the central rod and the spiral mixing pipe are inclined downwards; the stirring output pipe is located below the spiral mixing pipe.

[0011] Furthermore, a level gauge is installed inside the storage tank.

[0012] Furthermore, a central shaft is rotatably installed inside the storage tank, the top of the central shaft extends out of the storage tank and is connected to a stirring motor, and stirring blades are installed on the central shaft, with the stirring blades located at the bottom of the storage tank.

[0013] The beneficial effects of the above technical solution are: This invention introduces lime powder from a storage tank into a spiral mixing pipe via a powder feeding assembly. Water from a storage tank is then introduced into the spiral mixing pipe to form a premix. The water volume is precisely controlled by a regulating valve and flow meter, enabling continuous adjustment and delivery of the solid-liquid ratio. The spiral mixing pipe effectively extends the mixing path, allowing the powder and liquid to fully contact and initially mix before entering the reaction tank. Finally, the powder enters a stirring output pipe equipped with an auger mechanism for further stirring and emulsification, forming a uniform and stable lime slurry. This allows for fixed-ratio mixing and continuous feeding of the lime slurry, ensuring consistent feeding quality and facilitating uniform pH control. Compared to traditional direct powder feeding methods, this invention avoids problems such as powder floating, agglomeration, and sedimentation, significantly improving the reaction effect between lime and the target medium. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a cross-sectional schematic diagram of the storage tank.

[0015] Reference numerals in the attached drawings: 1. Mounting frame; 2. Storage tank; 3. Powder feeding assembly; 4. Liquid storage tank; 5. Spiral mixing pipe; 6. Mixing output pipe; 7. Regulating valve; 8. Flow meter; 9. Screw mechanism; 10. Center rod; 11. Level gauge; 12. Mixing motor; 13. Mixing blade; 14. Center shaft; 15. Fixing frame; 301. Ejector tube; 302. Blower; 501. Liquid inlet; 601. Discharge outlet. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: This embodiment aims to provide a continuous lime slurry feeding device, which is mainly used in arsenic removal processes, addressing the problem of poor reaction effect caused by directly adding lime powder in existing processes.

[0017] A continuous lime slurry feeding device, such as Figure 1 It includes a mounting frame 1 and a storage tank 2, a powder feeding assembly 3, a liquid storage tank 4, a spiral mixing pipe 5, and a stirring output pipe 6, all mounted on the mounting frame 1. The mounting frame 1 adopts a frame structure and is mainly used to provide a supporting foundation for each component. In specific implementation, it can be arranged according to the specific working conditions.

[0018] The bottom of the storage tank 2 is connected to one end of the spiral mixing pipe 5 via the powder feeding assembly 3. The powder feeding assembly 3 is mainly used to continuously convey lime powder from the storage tank 2 to the spiral mixing pipe 5. In this embodiment, the powder feeding assembly 3 includes an ejector pipe 301 and a blower 302. The ejector pipe 301 is horizontally arranged and is a three-way pipe. One end of the ejector pipe 301 is equipped with a blower 302 to provide airflow. The other end of the ejector pipe 301 is connected to the spiral mixing pipe 5 for outputting lime powder. The middle part of the ejector pipe 301 is connected to the bottom of the storage tank 2. Using the ejector principle, the lime powder in the storage tank 2 is adsorbed and output, ensuring that the lime powder is smoothly output from the storage tank 2. In addition, the wind provides an initial velocity for the lime powder, which also ensures the smooth conveying of lime powder in the spiral mixing pipe 5. In other embodiments, the powder feeding assembly 3 can also adopt a rotor wheel feeder, a spiral metering feeder, or other devices.

[0019] The bottom of the storage tank 4 is connected to the middle section of the spiral mixing pipe 5. The bottom of the storage tank 4 is equipped with a regulating valve 7 and a flow meter 8 to regulate the output water volume, thereby controlling the ratio of water to lime powder. During this process, the lime powder is transported to the spiral mixing pipe 5 by air power and then mixed with water. This prevents water from flowing back into the powder feeding assembly 3, thus preventing blockage and affecting powder feeding.

[0020] Furthermore, the spiral mixing pipe 5 is provided with multiple inlets 501 at intervals along its length for connecting with the storage tank 4. The storage tank 4, regulating valve 7 and flow meter 8 are each provided with multiple sets to gradually add water from multiple points, so that the lime powder is gradually soaked and dissolved in the spiral mixing pipe 5 to improve the uniformity of mixing.

[0021] The other end of the spiral mixing pipe 5 is connected to the inlet at the top of the mixing output pipe 6; the mixing output pipe 6 is provided with an outlet 601 for discharging lime slurry; an auger mechanism 9 is rotatably installed in the mixing output pipe 6, the auger mechanism 9 includes an auger and a drive motor connected by a transmission. The auger is rotatably installed in the spiral mixing pipe 5 to mix and convey the lime slurry. An exhaust port can be adapted to be provided at the top of the mixing output pipe 6 to maintain air pressure.

[0022] It also includes a central rod 10, which is fixed to the mounting frame 1, and a spiral mixing pipe 5 is coiled and fixed around the central rod 10. Both the central rod 10 and the spiral mixing pipe 5 are inclined downwards; the stirring output pipe 6 is located below the spiral mixing pipe 5. Considering that lime powder generates heat when mixed with water, this embodiment deliberately uses an open mounting frame 1 to fix the spiral mixing pipe 5 to facilitate heat dissipation; in other embodiments, in order to further dissipate heat, fans can be set at the front and rear to cool the spiral mixing pipe 5, or a hollow central rod 10 with good heat dissipation performance can be used, and cooling pipes can be set in the central rod 10 to cool the spiral mixing pipe 5.

[0023] Furthermore, such as Figure 2 A level gauge 11 is installed inside the storage tank 2 to detect the feeding speed of the storage tank 2. In this embodiment, the powder feeding speed is mainly controlled by gravity and ejector air force. The powder feeding speed can be controlled by adjusting the power of the blower 302, or a control valve (not shown in the attached figure) can be installed between the storage tank 2 and the ejector pipe 301 to adjust the powder feeding speed together with the blower 302. In this embodiment, a controller for controlling the feeding speed is provided. The controller is connected to the level gauge 11, the blower 302, the control valve, the regulating valve 7, and the flow meter 8.

[0024] A fixed frame 15 is fixed inside the storage tank 2. A central shaft 14 is rotatably mounted on the fixed frame 15. The top of the central shaft 14 extends out of the storage tank 2 and is connected to a stirring motor 12. A stirring blade 13 is mounted on the central shaft 14. The stirring blade 13 is located at the bottom of the storage tank 2 and is used to stir the lime powder to prevent the lime powder from settling and clumping.

Claims

1. A continuous lime slurry feeding device, characterized in that: Includes a mounting frame and storage tanks, powder feeding components, liquid storage tanks, spiral mixing pipes, and mixing output pipes mounted on the mounting frame; The bottom of the storage tank is connected to one end of the spiral mixing pipe via a powder feeding assembly; The bottom of the storage tank is connected to the middle section of the spiral mixing pipe, and a regulating valve and a flow meter are installed at the bottom of the storage tank. The other end of the spiral mixing pipe is connected to the stirring output pipe; The mixing output pipe is equipped with a discharge port, and an auger mechanism is rotatably installed in the mixing output pipe.

2. The continuous lime slurry feeding device according to claim 1, characterized in that: The powder feeding assembly includes an ejector tube and a blower; The ejector tube is horizontally arranged, with a blower at one end and the other end connected to a spiral mixing pipe. The middle part of the ejector tube is connected to the bottom of the storage tank.

3. The continuous lime slurry feeding device according to claim 1, characterized in that: The spiral mixing pipe is provided with multiple inlets along its length for connecting to the storage tank, and the storage tank, regulating valve and flow meter are each provided with multiple sets.

4. A continuous lime slurry feeding device according to any one of claims 1-3, characterized in that: It also includes a central rod, which is fixed on the mounting bracket, and the spiral mixing pipe is coiled and fixed on the central rod.

5. A continuous lime slurry feeding device according to claim 4, characterized in that: Both the central rod and the spiral mixing pipe are inclined downwards; the stirring output pipe is located below the spiral mixing pipe.

6. A continuous lime slurry feeding device according to any one of claims 1-3, characterized in that: The storage tank is equipped with a level gauge.

7. A continuous lime slurry feeding device according to any one of claims 1-3, characterized in that: The storage tank is equipped with a central shaft that rotates inside. The top of the central shaft extends out of the storage tank and is connected to a stirring motor. Stirring blades are mounted on the central shaft and are located at the bottom of the storage tank.

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