Polyacrylamide reactor stirring device suitable for laterite nickel ore

Abstract

The utility model discloses a kind of polyacrylamide reaction kettle stirring devices suitable for laterite nickel ore, it is related to chemical equipment technical field, including kettle body, kettle body is divided into two layers of inner layer and outer layer, circulating pipeline is installed between inner layer and outer layer;The utility model is through the cooperation of air disc and air hole, it is convenient to form vertical turbulence by micropore release condensate, and then cooperate circulating pipe heat transfer, further through the reverse rotation of anchor type stirring paddle and turbine type auxiliary turbulence generator, cooperate air disc to realize gas turbulence and mechanical stirring combination, break through single heat transfer mode limitation, improve heat dissipation effect;Further through the reverse rotation of anchor type stirring paddle and turbine type auxiliary turbulence generator, reduce the power required by rotating shaft, and then reduce energy consumption;Further through thermometer installed at different height positions, it is convenient to control temperature to kettle body inner portion layer, improve reaction process stability;Finally solve the problem that existing device high-low position reaction is not uniform, energy consumption is too large and reaction stability is poor.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a stirring device for a polyacrylamide reactor suitable for laterite nickel ore. Background Technology

[0002] In the hydrometallurgical process of laterite nickel ore, polyacrylamide is widely used as a flocculant in the countercurrent washing (CCD) process of leaching solution treatment and mineral processing. It is an important raw material in the HPAL process of low-grade laterite nickel ore. Its synthesis process is an exothermic reaction. If the heat cannot be dissipated in time, it will lead to excessively high local temperature, triggering partial hydrolysis reaction and affecting the abnormal indicators such as the degree of hydrolysis and molecular weight of the product.

[0003] Traditional stirring devices rely on mechanical stirring, but they have the following drawbacks: existing reactors produce exothermic reactions, but there are large temperature gradients at different locations within the vessel. Stirring blades alone cannot eliminate the temperature stratification within the vessel, leading to uneven reaction and affecting heat dissipation. Furthermore, multiple stirring blades need to rotate simultaneously during operation, resulting in high energy consumption. Moreover, existing devices control the temperature inside the vessel using only a single thermometer, which cannot specifically monitor temperatures at different heights, resulting in poor reaction stability. Therefore, these problems need to be addressed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a polyacrylamide reactor stirring device suitable for laterite nickel ore.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a polyacrylamide reaction vessel stirring device suitable for laterite nickel ore, comprising a vessel body, the vessel body being divided into an inner layer and an outer layer, a circulation pipe being installed between the inner layer and the outer layer, an observation port and a discharge port being installed at the top of the vessel body, a stirring mechanism being installed inside the vessel body, and a gas introduction mechanism being installed at the lower end of the stirring mechanism.

[0006] Preferably, three thermometers are inserted inside the vessel body, and the bottom heights of the three thermometers are all different.

[0007] Preferably, an air plate is installed at the bottom of the inner layer, an air cavity is opened inside the air plate, and multiple rings of air holes connected to the air cavity are opened through the top surface of the air plate. The diameters of the multiple rings of air holes are all different, and an air inlet is installed at the bottom of the air plate. The top of the air inlet communicates with the air cavity, and the bottom of the air inlet penetrates the inner layer and the outer layer.

[0008] Preferably, a discharge port is installed at the bottom of the vessel body, and one end of the discharge port communicates with the inner layer.

[0009] Preferably, the circulation pipe includes multiple loops of circulation pipe installed between the inner layer and the outer layer, with circulation water inlet and outlet installed at both the upper and lower ends of the circulation pipe, and the outer ends of the circulation water inlet and outlet sealingly penetrating through the outer layer.

[0010] Preferably, the stirring mechanism includes a motor installed at the top of the vessel body, and a rotating shaft is installed at the output end of the motor via a coupling. Two sets of anchor-type stirring paddles are installed on the rotating shaft, and a turbine-type auxiliary turbulence device is provided between the two sets of anchor-type stirring paddles. The turbine-type auxiliary turbulence device is installed on the rotating shaft, and the rotation direction of the turbine-type auxiliary turbulence device is opposite to the rotation direction of the anchor-type stirring paddles.

[0011] Preferably, a pressure relief valve and a vent are installed at the top of the vessel body. The pressure relief valve is located on the motor side, and the vent is located between the observation port and the discharge port.

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention, through the cooperation of the gas disc and the gas vents, facilitates the release of condensate through micropores to form vertical turbulence, which, in conjunction with the heat transfer via the circulation pipe, further enhances the heat dissipation effect by combining gas turbulence and mechanical stirring through the counter-rotating anchor-type stirring paddle and turbine-type auxiliary turbulence device, thus overcoming the limitations of a single heat transfer mode. Furthermore, the counter-rotating anchor-type stirring paddle and turbine-type auxiliary turbulence device reduce the power required for the rotating shaft, thereby reducing energy consumption. Additionally, thermometers installed at different heights facilitate layered temperature control within the reactor, improving the stability of the reaction process. Ultimately, this invention solves the problems of uneven reaction at different heights, excessive energy consumption, and poor reaction stability in existing devices. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device proposed in this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the device proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the overall bottom structure of the device proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the thermometer structure proposed in this utility model;

[0018] Figure 5 This is a schematic diagram of the gas disk structure proposed in this utility model.

[0019] The numbers in the diagram are: 1. Kettle body; 2. Inner layer; 3. Outer layer; 4. Motor; 5. Observation port; 6. Feed port; 7. Thermometer; 8. Air plate; 9. Air hole; 10. Air inlet; 11. Discharge port; 12. Circulation pipe; 13. Circulation water inlet and outlet; 14. Rotary shaft; 15. Anchor-type agitator; 16. Turbine-type auxiliary turbulence diffuser; 17. Pressure relief valve; 18. Air outlet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Example: See Figure 1-5 This utility model discloses a polyacrylamide reaction vessel stirring device suitable for laterite nickel ore, comprising a vessel body 1, which has two layers: an inner layer 2 and an outer layer 3. The inner layer 2 and outer layer 3 facilitate the installation of a circulation pipe 12, and a circulation pipeline is installed between the inner layer 2 and outer layer 3. An observation port 5 and a discharge port 6 are installed at the top of the vessel body 1. The observation port 5 facilitates the observation and recording of the reaction inside the vessel body 1; the discharge port 6 facilitates the feeding of materials into the vessel body 1. A stirring mechanism is installed inside the vessel body 1, and a gas introduction mechanism is installed at the lower end of the stirring mechanism. Three thermometers 7 are inserted inside the vessel body 1, allowing for real-time monitoring of the vessel body 1 at different heights. Internal temperature; the three thermometers 7 are at different heights at their bottom ends. An air plate 8 is installed at the bottom of the inner layer 2, which facilitates the formation of microbubble clusters by cooperating with the air holes 9. An air cavity is opened inside the air plate 8, and multiple rings of air holes 9 connected to the air cavity are opened through the top surface of the air plate 8, which facilitates the cooperation with the air plate 8. The diameters of the multiple rings of air holes 9 are all different, and an air inlet 10 is installed at the bottom of the air plate 8, which facilitates the supply of gas to the air cavity. The top of the air inlet 10 is connected to the air cavity, and the bottom of the air inlet 10 penetrates through the inner layer 2 and the outer layer 3. A discharge port 11 is installed at the bottom of the vessel body 1, which facilitates the discharge of the reacted materials. One end of the discharge port 11 is connected to the inner layer 2.

[0022] In this invention, the circulation pipe includes a multi-turn circulation pipe 12 installed between the inner layer 2 and the outer layer 3, which facilitates the circulation of condensate. The outer ends of the circulation water inlet and outlet 13 are sealed and extend through the outer layer 3. The stirring mechanism includes a motor 4 installed at the top of the vessel body 1, which facilitates the rotation of the rotating shaft 14. The output end of the motor 4 is connected to the rotating shaft 14 via a coupling, which facilitates the rotation of the anchor-type stirring paddle 15 and the turbine-type auxiliary turbulence diffuser 16. Two sets of anchor-type stirring paddles 15 are installed on the rotating shaft 14, and a turbine-type auxiliary turbulence diffuser 16 is provided between the two sets of anchor-type stirring paddles 15. The turbine-type auxiliary stirrer 16 and the anchor-type stirring paddle 15 facilitate stirring and heat transfer. The turbine-type auxiliary stirrer 16 is mounted on the rotating shaft 14, and the rotation direction of the turbine-type auxiliary stirrer 16 is opposite to that of the anchor-type stirring paddle 15. The top of the vessel body 1 is equipped with a pressure relief valve 17 and a gas outlet 18. The pressure relief valve 17 facilitates the reduction of the internal gas pressure of the vessel body 1. The gas outlet 18 facilitates the gas entering the reactor and being discharged from the gas outlet 18 at the top of the reactor, and is recycled through the circulation pump. The pressure relief valve 17 is located on the side of the motor 4, and the gas outlet 18 is located between the observation port 5 and the discharge port 6.

[0023] Working principle: When using this utility model, the device is connected to the power supply, and then the raw materials are put into the inner layer 2 through the feed port 6. Then, the anchor-type stirring paddle 15 is started. The two sets of anchor-type stirring paddles 15 can not only make the raw materials uniform and accelerate the reaction speed, but also assist the circulation pipe 12 in conducting heat. At this time, the thermometer 7 will monitor the temperature difference of different height areas in real time. When the thermometer 7 detects that the temperature difference between the middle layer and the bottom layer is ≥3℃, the turbine-type auxiliary turbulence device 16 is started. The turbine-type auxiliary turbulence device 16 rotates in opposite directions to the anchor-type stirring paddle 15, and the condensate flow rate is increased to 1.5m³ / min. This process can improve the thermal conductivity of the device. After the reaction is completed, the power is turned off and the pressure relief valve 17 is opened. The reacted material finally enters the next process through the bottom end.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stirring device for a polyacrylamide reactor suitable for laterite nickel ore, comprising a reactor body (1), characterized in that: The vessel body (1) is divided into two layers: an inner layer (2) and an outer layer (3). A circulation pipe is installed between the inner layer (2) and the outer layer (3). An observation port (5) and a discharge port (6) are installed at the top of the vessel body (1). A stirring mechanism is installed inside the vessel body (1). A gas introduction mechanism is installed at the lower end of the stirring mechanism.

2. The stirring device for a polyacrylamide reactor suitable for laterite nickel ore according to claim 1, characterized in that: Three thermometers (7) are inserted inside the vessel body (1), and the bottom heights of the three thermometers (7) are different.

3. The stirring device for a polyacrylamide reactor suitable for laterite nickel ore according to claim 2, characterized in that: An air plate (8) is installed at the bottom of the inner layer (2). An air cavity is opened inside the air plate (8), and multiple air holes (9) connected to the air cavity are opened through the top surface of the air plate (8). The diameters of the multiple air holes (9) are different. An air inlet (10) is installed at the bottom of the air plate (8). The top of the air inlet (10) is connected to the air cavity, and the bottom of the air inlet (10) penetrates the inner layer (2) and the outer layer (3).

4. The stirring device for a polyacrylamide reactor suitable for laterite nickel ore according to claim 3, characterized in that: The bottom of the vessel body (1) is equipped with a discharge port (11), one end of which is connected to the inner layer (2).

5. The stirring device for a polyacrylamide reactor suitable for laterite nickel ore according to claim 4, characterized in that: The circulation pipe includes a multi-turn circulation pipe (12) installed between the inner layer (2) and the outer layer (3). The upper and lower ends of the circulation pipe (12) are equipped with circulation water inlet and outlet (13), and the outer ends of the circulation water inlet and outlet (13) are sealed and penetrate out of the outer layer (3).

6. The stirring device for a polyacrylamide reactor suitable for laterite nickel ore according to claim 5, characterized in that: The stirring mechanism includes a motor (4) installed at the top of the vessel body (1). The output end of the motor (4) is connected to a rotating shaft (14) via a coupling. Two sets of anchor-type stirring paddles (15) are installed on the rotating shaft (14). A turbine-type auxiliary turbulence device (16) is provided between the two sets of anchor-type stirring paddles (15). The turbine-type auxiliary turbulence device (16) is installed on the rotating shaft (14), and the rotation direction of the turbine-type auxiliary turbulence device (16) is opposite to the rotation direction of the anchor-type stirring paddles (15).

7. The stirring device for a polyacrylamide reactor suitable for laterite nickel ore according to claim 1, characterized in that: The pressure relief valve (17) and the air outlet (18) are installed at the top of the vessel body (1). The pressure relief valve (17) is located on the side of the motor (4), and the air outlet (18) is located between the observation port (5) and the discharge port (6).

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