A high-efficiency constant-temperature slurry device

Abstract

This utility model discloses a high-efficiency constant-temperature slurry device, belonging to the technical field of non-ferrous smelting equipment. It includes a stirring drive mechanism, a thermometer, and a tank. The stirring drive mechanism is installed in the upper center of the tank. The thermometer is positioned above the tank, with its measuring end extending into the tank. The outer wall of the tank has a jacket, with a steam outlet and a steam inlet equipped with valves on the outer wall of the jacket. Baffles are welded to the inner wall of the tank, and a discharge port is located at the bottom of the tank. A stirring paddle driven by the stirring drive mechanism is located in the center of the tank. This utility model achieves three key benefits: first, by using a double-layered counter-directional paddle and inclined baffles, it constructs a three-stage dispersion system of "axial tumbling – radial shearing – turbulent pulsation," improving mass transfer efficiency by 40%–60%; second, through optimized jacketed flow channels and closed-loop control, temperature fluctuations are ≤±2℃, stabilizing slurry thermodynamic conditions; and third, the 2:1 tapered tank and guide baffles result in a discharge residue rate ≤1%, significantly improving material utilization.

Description

Technical Field

[0001] This utility model relates to the technical field of solid-liquid slurry processing equipment, specifically to a high-efficiency constant-temperature slurry processing device. Background Technology

[0002] In industrial processes such as hydrometallurgy, flue gas desulfurization, and catalyst synthesis, the slurry quality of solid auxiliary materials directly determines reaction efficiency and product stability. Existing slurry technologies suffer from the following core defects:

[0003] (1) Single flow field and low mass transfer efficiency: Traditional impellers are mostly single-layer structures (such as axial impellers or radial impellers), which can only form a unidirectional flow field. Solid-liquid mixing is prone to "dead zone". Without baffle design, it is impossible to effectively induce turbulence, resulting in particle breakage and slow dispersion speed (slurry time often exceeds 30 minutes), which restricts production efficiency.

[0004] (2) Poor temperature control accuracy and insufficient reaction stability: The jacket heating is mostly a simple "bottom in and bottom out" layout, with uneven heat flow distribution and temperature fluctuations in the tank reaching ±5℃. This has a significant impact on temperature-sensitive slurry reactions (such as calcium salt dissolution and antimony salt activation), and can easily lead to problems such as poor slurry uniformity and scaling.

[0005] (3) Serious residue after discharge, resulting in material waste: The tank tapering design is unreasonable (taper <2:1), and the slurry is easy to accumulate at the bottom. The residue rate after discharge is as high as 5% to 10%, which increases material costs and cleaning burden.

[0006] The aforementioned problems result in low pulping efficiency, unstable product quality, and high energy consumption and material loss, urgently requiring innovative equipment and processes to overcome these bottlenecks. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency constant-temperature slurry processing device to solve the problems existing in the prior art.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A high-efficiency constant-temperature slurry processing device includes a stirring drive mechanism 1, a thermometer 2, and a tank 9. The stirring drive mechanism 1 is installed in the upper center of the tank 9. The thermometer 2 is located above the tank 9 with its measuring end extending into the tank. The outer wall of the tank 9 is provided with a jacket 4, and the outer wall of the jacket 4 is provided with a steam outlet 3 with a valve and a steam inlet. A baffle 7 is welded on the inner wall of the tank 9, and a discharge port 8 is provided at the bottom of the tank 9. A stirring paddle 6 driven by the stirring drive mechanism 1 is arranged in the center of the tank 9.

[0010] The stirring paddle 6 includes two layers of blades, with the upper layer being an inclined blade and the lower layer being a horizontal blade.

[0011] The upper inclined blade of the stirring paddle 6 has an inclination angle of 30°-45°; the lower flat blade of the stirring paddle 6 is a flat blade with serrated protrusions, the height of the serrations is 1 / 3-1 / 5 of the blade thickness, and the vertical distance between the two blades is 0.5-1 times the diameter of the upper inclined blade.

[0012] The top cover of the tank 9 is provided with a feeding port 5.

[0013] The trough 9 is composed of a cylindrical body and a conical cylinder connected to the bottom of the cylindrical body, and the taper of the conical cylinder is ≥2:1.

[0014] The distance between the inner wall of the interlayer 4 and the outer wall of the tank 9 is 10-30 mm.

[0015] Four sets of baffles 7 are evenly distributed around the inner circumference of the tank 9.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0017] This invention features three main features: First, by using a double-layered counter-rotating impeller and inclined baffles, a three-stage dispersion system of "axial tumbling - radial shearing - turbulent pulsation" is constructed, improving mass transfer efficiency by 40% to 60%; second, the sandwiched flow channel is optimized and closed-loop control is applied, resulting in temperature fluctuations of ≤±2℃ and stable slurry thermodynamic conditions; and third, the 2:1 tapered trough and guide baffles ensure a discharge residue rate of ≤1%, significantly improving material utilization. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] In the diagram: 1—stirring drive mechanism; 2—thermometer; 3—steam outlet; 4—jacket; 5—feeding port; 6—stirring paddle; 7—baffle plate; 8—discharge port; 9—tank body. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example 1

[0024] like Figure 1 This embodiment provides a high-efficiency constant-temperature slurry preparation device, including a stirring drive mechanism 1, a thermometer 2, and a tank 9. The top cover of the tank 9 is provided with a feeding port 5. The stirring drive mechanism 1 is installed in the upper center of the tank 9. The thermometer 2 is set above the tank 9 and extends into the tank. The outer wall of the tank 9 is provided with a jacket 4. The distance between the inner wall of the jacket 4 and the outer wall of the tank 9 is 10-30mm. The outer wall of the jacket 4 is provided with a steam outlet 3 with a valve and a steam inlet. The steam outlet 3 is located in the upper part of the jacket 4, and the steam inlet is located in the lower part of the jacket 4. Saturated steam is introduced through the steam inlet of the jacket 4 and uniformly heated by heat conduction through the wall surface. The thermometer 2 provides real-time feedback, and the steam valve is dynamically adjusted to stabilize the slurry temperature (e.g., 40-80℃, depending on the material). The temperature fluctuation is ≤±2℃, achieving uniform temperature control. A baffle 7 is welded on the inner wall of the tank 9, and a discharge port 8 is provided at the bottom of the tank 9. A stirring paddle 6 driven by the stirring drive mechanism 1 is set in the center of the tank 9. The stirring paddle 6 includes two layers of blades, with the upper layer being an inclined blade and the lower layer being a horizontal blade.

[0025] The upper inclined blade of the agitator 6 has an inclination angle of 30°, which creates an axial tumbling flow field and drives the slurry to circulate up and down; the lower flat blade of the agitator 6 is a flat blade with serrated protrusions, the height of the serrations being 1 / 5 of the blade thickness, which generates strong radial shear force to break particles; the vertical distance between the two blades is 0.5-1 times the diameter of the upper inclined blade, which together form a composite dynamic field of "axial tumbling-radial shearing".

[0026] The tank 9 consists of a cylindrical body connected to a conical body at the bottom of the cylindrical body. The conical body has a taper of 2:1 (bottom diameter: cone height) to reduce slurry residue by guiding the flow through the conical surface (residue rate ≤1%).

[0027] Four sets of baffles 7 are evenly distributed around the inner circumference of the tank 9. The top of the baffles 7 is inclined at 30°-60° towards the center of the tank, inducing "cutting-collision-re-aggregation" turbulent pulsation in the liquid-solid mixture, accelerating particle breakage and dispersion.

[0028] The thermometer 2 extends half the depth of the cylindrical section of the tank 9, and together with the jacketed "bottom in, top out" steam flow channel, it achieves closed-loop temperature control of ±2℃ and stabilizes the thermodynamic conditions of slurry production.

[0029] The application of this invention in the nickel-cobalt removal process of zinc alloy powder is as follows: In this process, liquid antimony salt, due to its high catalytic activity, becomes a key auxiliary agent. Its preparation process maximizes catalytic efficiency through optimized slurry processing. The specific operation flow is as follows: First, solid antimony salt is quantitatively added to the slurry device through a dedicated feed port 5, forming a preliminary mixture with the circulating liquid (usually process return liquid) within the device. Then, the stirring system (stirring drive mechanism 1) is activated. The high-speed rotation of the stirring paddle 6 generates a strong shear force field, promoting full contact between the antimony salt particles and the circulating liquid, resulting in a slurry reaction. During this process, the baffle plate 7 within the device plays a crucial role—its unique geometric configuration guides the fluid to form a turbulent flow field, causing the mixture to continuously collide, separate, and re-aggregate with the baffle plate under high-speed stirring, effectively breaking up antimony salt particle agglomerates and significantly improving solid-liquid mass transfer efficiency.

[0030] Through the synergistic effect of mechanical stirring and flow field optimization, antimony salts complete the transformation from solid particles to a uniform liquid slurry in a short time: on the one hand, the axial and radial mixing flow patterns of the stirring paddle ensure uniform material distribution; on the other hand, the enhanced turbulence effect of the baffle plate refines the particle size to the micrometer level, significantly increasing the reaction specific surface area. When the slurry system reaches the preset concentration, the qualified slurry is pumped through outlet 8 to the required reaction tank, precisely proportioned with the zinc powder system, providing a highly active catalytic environment for the subsequent nickel-cobalt removal reaction.

[0031] This process, through equipment structure optimization and coordinated operation parameters, shortens the antimony salt slurry preparation time by more than 30%. The resulting liquid catalyst has the advantages of good dispersibility and uniform active components, ensuring the efficient performance of alloy zinc powder in the impurity removal process from the source. It provides a stable and reliable precursor preparation scheme for the solution purification process of non-ferrous metal hydrometallurgy.

[0032] The application of this invention in the limestone-gypsum wet desulfurization process is as follows: In the limestone-gypsum wet desulfurization process, the preparation efficiency of limestone slurry directly affects the operational efficiency of the desulfurization system. Addressing the problems of slow reaction rate and uneven particle dispersion in traditional slurry equipment, this isothermal slurry equipment, through structural innovation and process optimization, constructs a highly efficient solid-liquid reaction system. The specific process is as follows: Limestone particles fall uniformly into the tank 9 through the quantitative feed port 5, forming an initial mixture with the circulating filtrate (desulfurization filtrate) from the desulfurization system. The built-in variable frequency stirring system drives two layers of staggered stirring blades 6. Through the design of a composite flow field of low-speed laminar flow and high-speed shear, a strongly turbulent mixing zone is formed between the solid and liquid phases in the blade tip region.

[0033] Four sets of baffles 7, symmetrically arranged on the inner wall of the slurry tank, are spirally distributed at a 45° inclination angle. Their unique flow-guiding structure forces the radially flowing slurry to axially churn, forming a dynamic cycle of "collision-splitting-re-aggregation." When the high-speed flowing slurry impacts the serrated edges of the baffles, the agglomerated limestone particles are forcibly broken up, while the mass transfer boundary layer between the liquid and solid phases is continuously renewed, increasing the CaCO3 dissolution rate by more than 40%. Combined with a constant temperature system (temperature control accuracy ±1.5℃), the slurry reaction temperature is stabilized at 45-55℃ (the optimal range for calcium salt dissolution), effectively avoiding the scaling problems caused by supersaturation fluctuations in traditional room-temperature slurry processing.

[0034] Under the combined effects of mechanical dispersion and temperature, limestone particles undergo a progressive refinement process of "surface dissolution – angular crushing – fine particle dispersion," ultimately forming a homogeneous gypsum slurry. The gypsum slurry discharged through the outlet is monitored in real-time by an online density meter, ensuring that the effective dissolved concentration of CaCO3 is increased by 25% compared to traditional devices, providing a highly active reaction medium for the efficient capture of SO2 in the subsequent absorption tower. This device, through flow field optimization and temperature control coupling, shortens the slurry preparation time to half that of traditional processes, solving the efficiency bottleneck in the slurry preparation stage from the source and significantly improving the overall operational stability of the desulfurization system.

[0035] The application of this invention in a chemical production process is as follows: Manganese dioxide, due to the low activity and poor dispersibility of its solid particles, is easily subjected to high mass transfer resistance and limited reaction rate when directly added to the reaction tank, thus affecting production efficiency. To address this problem, this invention constructs a highly efficient pre-dispersion system, with the specific process optimization as follows:

[0036] First, a quantitative reaction solution (acidic leachate) is pre-injected into the slurry tank 9 and preheated to the optimal reaction temperature range (typically 40-80℃) using a temperature control system. Then, manganese dioxide powder is uniformly sprayed into the tank through an air-pumped feed port 5, avoiding localized agglomeration caused by traditional gravity feeding. The device is equipped with a two-layer turbine agitator 6 operating at a variable frequency of 200-500 rpm. The blades generate strong shear force during rotation, initially dispersing the initially added MnO2 particles to form a coarse suspension with a solid content of 15%–25%.

[0037] Four sets of baffles symmetrically distributed on the inner wall of the slurry tank create a synergistic effect with the stirring impeller: when the high-speed flowing liquid-solid mixture collides with the baffles, the fluid is forced to change direction and generate violent turbulence, subjecting the agglomerated MnO2 particles to high-frequency "cutting-collision-breaking" action. Simultaneously, steam is uniformly introduced into the jacket 4 through the spiral heating pipe 3, maintaining a stable temperature within the tank at 0.3-0.5 MPa saturated steam, further accelerating solid-liquid mass transfer by increasing molecular kinetic energy.

[0038] This dynamic slurry process achieves a synergistic effect of mechanical dispersion and thermal activation: the axial flow of the agitator propels the material through vertical circulation, while baffles enhance radial mixing, enabling manganese dioxide particles to transform from aggregates to a nanoscale dispersed phase within 10–15 minutes (increasing specific surface area by over 30%). Compared to traditional dry addition, this method shortens the induction period of the target reaction by 40% and increases the main reaction rate by 25%–35%, fundamentally solving the bottleneck in production efficiency caused by poor dispersibility of solid particles. Through flow field optimization and temperature control coupling, this device constructs a highly efficient pre-activation system, providing a standardized pretreatment solution for chemical reactions relying on solid oxidants.

Claims

1. A high-efficiency constant-temperature slurry processing device, comprising a stirring drive mechanism (1), a thermometer (2), and a tank (9), characterized in that, The stirring drive mechanism (1) is installed in the upper center of the tank (9), the thermometer (2) is set above the tank (9) with its measuring end extending into the tank, the outer wall of the tank (9) is provided with a jacket (4), the outer wall of the jacket (4) is provided with a steam outlet (3) with a valve and a steam inlet; the inner wall of the tank (9) is welded with a baffle plate (7), the bottom of the tank (9) is provided with a discharge port (8); the center of the tank (9) is provided with a stirring paddle (6) driven by the stirring drive mechanism (1).

2. The high-efficiency constant-temperature slurry processing device according to claim 1, characterized in that: The stirring paddle (6) includes two layers of blades, the upper layer being an inclined blade and the lower layer being a horizontal blade.

3. The high-efficiency constant-temperature slurry processing device according to claim 2, characterized in that: The upper inclined blade of the stirring paddle (6) has an inclination angle of 30°-45°; the lower flat blade of the stirring paddle (6) is a flat blade with serrated protrusions, the height of the serrations is 1 / 3-1 / 5 of the blade thickness, and the vertical distance between the two blades is 0.5-1 times the diameter of the upper inclined blade.

4. The high-efficiency constant-temperature slurry processing device according to claim 1, characterized in that: The top cover of the tank (9) is provided with a feeding port (5).

5. The high-efficiency constant-temperature slurry processing device according to claim 1, characterized in that: The trough (9) is composed of a cylindrical body and a conical cylinder connected to the bottom of the cylindrical body, wherein the taper of the conical cylinder is ≥2:

1.

6. The high-efficiency constant-temperature slurry processing device according to claim 1, characterized in that: The distance between the inner wall of the interlayer (4) and the outer wall of the tank (9) is 10-30 mm.

7. The high-efficiency constant-temperature slurry processing device according to claim 1, characterized in that: The inner wall of the tank (9) has four sets of baffles (7) evenly distributed around its circumference.

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