Defoaming reaction tank

Abstract

The utility model belongs to the technical field of mechanical stirring equipment, and discloses a defoaming reaction tank. The defoaming reaction tank comprises a tank body, a sealing cover, a stirring device, a defoaming device and a spoiler, wherein a stirring chamber with an opening in the upper part is arranged in the tank body; the sealing cover seals the opening; the stirring device comprises a stirring shaft arranged in the tank body, a stirring paddle arranged on the stirring shaft and a rotation driving part, the rotation driving part is arranged on the outer wall of the sealing cover, and the output end of the rotation driving part is connected with the stirring shaft and used for driving the stirring shaft to rotate; the defoaming device is arranged at one end, close to the sealing cover, of the stirring shaft and can pierce bubbles; the spoiler is arranged on the inner circumferential wall of the stirring chamber and extends in the axial direction of the tank body, a defoaming part is arranged at the end, close to the sealing cover, of the spoiler, and the defoaming part can pierce bubbles. The defoaming reaction tank is durable and stable in defoaming and low in cost, and the leaching efficiency and the leaching effect of slurry can be improved while defoaming is performed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical stirring equipment, in particular to a defoaming reaction tank. Background Art

[0002] In the hydrometallurgical acid leaching process, acidic leaching agents such as dilute sulfuric acid are often used as solvents to dissolve the valuable metals in the raw materials into the solution, making it easier to recover them in subsequent processes.

[0003] However, due to the complexity of the raw material composition, especially when it contains active substances, a large amount of foam is easily generated on the liquid surface during the leaching process of the slurry in the reaction tank. These foams covering the surface of the leaching solution will affect the discharge of the gas generated by the reaction, thereby affecting the adequacy of the reaction. In addition, since the stirring shaft will constantly stir the material during the leaching process, resulting in a large amount of foam, it is easy to cause the tank to run out of the tank or the capping tank. For reaction tanks without sealing covers, the foam may carry the slurry to overflow or spray out from the inlet, posing a risk of scalding the staff and causing material loss. At present, temporary defoaming is often performed by adding defoaming liquid, but the defoaming effect is unstable, not long-lasting, and expensive.

[0004] Therefore, it is urgent to propose a defoaming reaction tank to solve the above technical problems. Utility Model Content

[0005] The utility model provides a defoaming reaction tank, which can eliminate foam generated during the slurry leaching process in a mechanical way. The defoaming is long-lasting, stable and low-cost. Moreover, the leaching efficiency and leaching effect of the slurry can be improved while defoaming.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Defoaming reaction tank, including:

[0008] A tank body, wherein a stirring chamber with an opening at the top is provided in the tank body;

[0009] a sealing cover, which is arranged on the opening;

[0010] a stirring device, comprising a stirring shaft disposed in the tank body, a stirring paddle disposed on the stirring shaft, and a rotating drive member, wherein the rotating drive member is disposed on the outer wall of the sealing cover, and an output end of the rotating drive member is connected to the stirring shaft for driving the stirring shaft to rotate;

[0011] a defoaming device, disposed at one end of the stirring shaft close to the sealing cover, the defoaming device being capable of puncturing bubbles;

[0012] A spoiler is provided on the inner peripheral wall of the stirring chamber, the spoiler extends along the axial direction of the trough body, and a defoaming portion is provided at one end of the spoiler close to the sealing cover, and the defoaming portion can puncture bubbles.

[0013] Optionally, the defoaming device comprises:

[0014] A connecting rod, the middle portion of which is connected to the stirring shaft;

[0015] Defoaming nets, installed on both sides of the connecting rod and the stirring shaft;

[0016] The defoaming brush is arranged on the connecting rod and located at the lower part of the defoaming net.

[0017] Optionally, a plurality of defoaming columns are provided at intervals on the connecting rod, the plurality of defoaming columns form the defoaming brush, and the end of each defoaming column is conical.

[0018] Optionally, the defoaming net is arranged at an angle to the horizontal plane, and the angle between the defoaming net and the horizontal plane is 15°-20°.

[0019] Optionally, the defoaming portion is serrated.

[0020] Optionally, the sealing cover is provided with an exhaust hole communicating with the stirring chamber and the outside, a demister is provided at the exhaust hole, and the exhaust hole is communicated with an exhaust pipe.

[0021] Optionally, the demister is a cyclone demister.

[0022] Optionally, the bottom of the trough body is conical, and a discharge port communicating with the stirring chamber and the outside is provided at the lowest point of the bottom of the trough body.

[0023] Optionally, a slurry inlet and a leaching agent inlet are provided on the upper portion of the tank body, and both the slurry inlet and the leaching agent inlet are connected to the outside and the stirring chamber; and / or a transparent observation window is provided on the tank body.

[0024] Optionally, a plurality of supporting legs are provided at the bottom of the trough body along the circumference of the trough body.

[0025] Beneficial effects of the utility model:

[0026] The utility model provides a defoaming reaction tank, comprising a tank body, a sealing cover, a stirring device, a defoaming device, and a spoiler. The stirring chamber in the tank body is used to hold a slurry and an extractant. During operation, a rotating driving member of the stirring device drives a stirring shaft to rotate, and the rotation of the stirring shaft drives a stirring paddle and a defoaming device thereon to rotate. During the rotation process, the stirring paddle stirs the slurry and the extractant, and at the same time, the spoiler obstructs the slurry. That is, under the combined action of the stirring paddle and the spoiler, the flow pattern of the slurry fluid is continuously disrupted, increasing the turbulence of the slurry fluid, thereby increasing the mixing effect of the slurry and the extractant, thereby improving the leaching efficiency and leaching effect of the slurry. In addition, during the stirring process, the defoaming portion on the defoaming device and the spoiler can puncture bubbles to play a defoaming role. Compared with the method of using a defoaming liquid for temporary defoaming in the prior art, the defoaming can be continuously defoamed during the stirring process, and the defoaming is long-lasting, stable, and low-cost.

[0027] The defoaming device is installed on the stirring shaft, so that the stirring paddle and the defoaming device can be rotated by rotating the driving member. Compared with providing rotating driving members for the stirring shaft and the defoaming device respectively, the use of parts is reduced, the parts cost is reduced, and the control difficulty is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 Schematic diagram of a defoaming reaction tank provided by an embodiment of the present utility model (showing the internal structure);

[0030] Figure 2 1. It is a top view of the defoaming reaction tank provided by an embodiment of the present utility model (showing the defoaming device);

[0031] Figure 3 It is a schematic diagram of a defoaming device provided in an embodiment of the present utility model.

[0032] In the picture:

[0033] 100, tank body; 110, mixing chamber; 120, exhaust hole; 130, demister; 140, discharge port; 150, slurry inlet; 160, extractant inlet; 170, observation window; 180, support leg;

[0034] 200, sealing cover;

[0035] 300, stirring device; 310, stirring shaft; 320, stirring paddle; 330, rotating drive member;

[0036] 400, defoaming device; 410, connecting rod; 420, defoaming net; 430, defoaming brush; 431, defoaming column; 500, spoiler; 510, defoaming part. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0038] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0041] This embodiment provides a defoaming reaction tank, which can eliminate the foam generated during the slurry leaching process by mechanical means. The defoaming is long-lasting, stable, and low-cost. In addition, the leaching efficiency and leaching effect of the slurry can be improved while defoaming.

[0042] Specifically, if Figure 1 As shown, the defoaming reaction tank includes a tank body 100, a sealing cover 200, a stirring device 300, a defoaming device 400 and a spoiler 500. Among them, a stirring chamber 110 with an opening at the top is provided in the tank body 100, and the stirring chamber 110 is used to hold the slurry and the leaching agent. The sealing cover 200 is provided at the opening. By providing the sealing cover 200, it is possible to prevent the gas generated during the slurry leaching process from entraining the slurry and overflowing into the external environment, thereby avoiding material loss and being beneficial to environmental protection. The stirring device 300 includes a stirring shaft 310 provided in the tank body 100, a stirring paddle 320 provided on the stirring shaft 310, and a rotating drive member 330. The rotating drive member 330 is provided on the outer wall of the sealing cover 200, and the output end of the rotating drive member 330 is connected to the stirring shaft 310 for driving the stirring shaft 310 to rotate. The defoaming device 400 is provided at one end of the stirring shaft 310 close to the sealing cover 200, and the defoaming device 400 can puncture bubbles. The spoiler 500 is provided on the inner peripheral wall of the stirring chamber 110 and extends along the axial direction of the tank body 100 . An end of the spoiler 500 close to the sealing cover 200 is provided with a defoaming portion 510 that can puncture bubbles.

[0043] The working principle of the defoaming reaction tank is:

[0044] The slurry is transported into the stirring chamber 110. After the transport is completed, the rotary drive member 330 is started, and an appropriate amount of leaching agent is simultaneously input into the stirring chamber 110. The rotary drive member 330 drives the stirring shaft 310 to rotate, and the rotation of the stirring shaft 310 drives the stirring paddle 320 and the defoaming device 400 thereon to rotate. During the stirring process, the stirring paddle 320 is used to mix the slurry and the leaching agent. During the mixing process, the slurry and the leaching agent react to generate bubbles. The defoaming device 400 is used to eliminate the bubbles generated during the rotation process.

[0045] For a leaching tank without a spoiler 500, the slurry fluid will gradually become stable after stirring for a period of time, and the slurry fluid will gradually transition from turbulent flow to laminar flow, resulting in a poor mixing effect between the slurry and the leaching agent. The defoaming reaction tank provided in this embodiment, by providing a spoiler 500 to hinder the flow of the slurry, can continuously disrupt the flow pattern of the slurry fluid, so that the slurry fluid maintains turbulence for a long time, and the degree of turbulence is relatively high, thereby improving the mixing effect between the slurry and the fluid, and thus improving the leaching efficiency and leaching effect of the slurry.

[0046] In addition, a defoaming portion 510 is provided on the spoiler 500. When the slurry fluid encounters the defoaming portion 510 under the action of the stirring paddle 320, the bubbles generated in the slurry fluid will be punctured, that is, by the combined action of the defoaming portion 510 and the defoaming device 400, the defoaming effect of the defoaming reaction tank is improved. In addition, the defoaming reaction tank adopts the principle of mechanical defoaming, and defoaming can be achieved without a chemical defoaming liquid. Compared with the method of temporarily defoaming with a defoaming liquid in the prior art, defoaming can be continuously performed during stirring, and defoaming is long-lasting, stable, and low in cost. The defoaming device 400 is installed on the stirring shaft 310 so that the rotation of the stirring paddle 320 and the defoaming device 400 can be achieved by rotating the driving member 330. Compared with respectively arranging the rotating driving member 330 for the stirring shaft 310 and the defoaming device 400, the use of parts is reduced, the cost of parts is reduced, and the control difficulty is also reduced.

[0047] Alternatively, as Figure 1 and Figure 2 As shown, a slurry inlet 150 and a leaching agent inlet 160 are provided at the upper portion of the tank body 100. Both the slurry inlet 150 and the leaching agent inlet 160 are connected to the outside and the stirring chamber 110. The slurry is transported into the stirring chamber 110 through the slurry inlet 150, and the leaching agent is transported into the stirring chamber 110 through the leaching agent inlet 160. By separately arranging the slurry inlet 150 and the leaching agent inlet 160, it is convenient to control the amount of slurry and leaching agent added.

[0048] Optionally, continue with Figure 1 A transparent observation window 170 is provided on the tank body 100. By providing the observation window 170, the staff can understand the stirring situation in the stirring chamber 110 through the observation window 170.

[0049] Furthermore, a plurality of observation windows 170 may be provided so as to observe the slurry fluid in the stirring chamber 110 at different positions.

[0050] In this embodiment, two observation windows 170 are provided, and the two observation windows 170 are spaced apart along the axial direction of the tank body 100. In other embodiments, the number and arrangement of the observation windows 170 can also be other, and can be arranged according to actual needs, and this application does not make specific limitations.

[0051] Furthermore, a plurality of spoilers 500 may be provided, and the plurality of spoilers 500 are spaced apart along the circumference of the stirring chamber 110. By providing a plurality of spoilers 500, the obstruction effect on the slurry flow can be improved, which is conducive to further improving the leaching efficiency and leaching effect of the slurry.

[0052] Optionally, continue with Figure 2In this embodiment, four spoilers 500 are provided, and the four spoilers 500 are arranged at 90° intervals along the circumference of the stirring chamber 110. In other embodiments, the number and arrangement of the spoilers 500 may be other, and can be arranged according to actual needs, and this application does not make any specific limitations.

[0053] Optionally, continue with Figure 1 In this embodiment, the defoaming portion 510 is serrated. The serrated defoaming portion 510 has sharp corners, which is convenient for puncturing bubbles. The serrated defoaming portion 510 is also relatively simple to process.

[0054] Of course, in other embodiments, the structure of the defoaming portion 510 can also be set to other structures according to actual needs, and this application does not make any specific limitations.

[0055] Further, see Figure 1 and Figure 2 The sealing cover 200 is provided with an exhaust hole 120 that connects the mixing chamber 110 to the outside world. The exhaust hole 120 is connected to an exhaust pipe (not shown in the figure). The acid mist and gas generated during the leaching process are discharged through the exhaust hole 120 and then processed through the exhaust pipe. In addition, a demister 130 is provided at the exhaust hole 120. As the gas rises, it will carry a small amount of foam. When the gas carrying foam passes through the demister 130, the foam will be eliminated by the demister 130. The droplets formed after the foam breaks will fall back into the mixing chamber 110, thus preventing material loss.

[0056] Optionally, the demister 130 can be a cyclone demister. When the foam-laden gas passes through the gaps between the blades of the cyclone demister, it becomes a swirling airflow. Under the action of inertia, the swirling airflow is ejected at a certain elevation angle in a spiral motion and is flung outward. Droplets generated by the bursting bubbles adhere to the inner wall of the exhaust hole 120 and, after agglomerating into large particles, flow back into the mixing chamber 110, achieving the purpose of demisting and defoaming.

[0057] Further, see Figure 1 The bottom of the tank body 100 is tapered, and a discharge port 140 is provided at the lowest point of the bottom of the tank body 100, which connects the mixing chamber 110 with the outside. The stirred slurry is discharged from the mixing chamber 110 through the discharge port 140. The tapered bottom of the tank body 100 facilitates the complete discharge of the slurry, reducing the risk of slurry accumulation and compaction.

[0058] Further, see Figure 1 , along the circumference of the tank body 100, a plurality of support legs 180 are provided at the bottom of the tank body 100. By providing a plurality of support legs 180, the tank body 100 can be supported and the structural stability of the tank body 100 can be improved.

[0059] Furthermore, if Figure 2 and Figure 3 As shown, in this embodiment, the defoaming device 400 includes a connecting rod 410, a defoaming net 420 and a defoaming brush 430. The middle part of the connecting rod 410 is connected to the stirring shaft 310. The defoaming net 420 is installed on both sides of the connecting rod 410 and the stirring shaft 310. The defoaming brush 430 is arranged on the connecting rod 410 and is located at the lower part of the defoaming net 420. The defoaming brush 430 in the defoaming device 400 can generate shear force during rotation, breaking up the large bubbles at the lower part, thereby eliminating the large bubbles; the defoaming net 420 intercepts the small bubbles entering therein through the filtering effect, breaking the bubbles, thereby eliminating the residual small bubbles. The defoaming device 400 is more thorough in defoaming by the combined action of the defoaming brush 430 and the defoaming net 420, and the defoaming device 400 has a simple structure and is easy to install.

[0060] Optionally, continue with Figure 3 The connecting rod 410 is provided with a plurality of defoaming columns 431 at intervals, and the plurality of defoaming columns 431 form a defoaming brush 430, and the end of each defoaming column 431 is conical. The defoaming brush 430 has a simple structure, is easy to process, and has a good defoaming effect.

[0061] Furthermore, the defoaming column 431 can be made of steel bars.

[0062] Optionally, the lengths of the multiple defoaming columns 431 may be the same or different, and may be set according to actual needs, and this application does not make any specific limitations.

[0063] Optionally, the distance between two adjacent defoaming columns 431 is 5 cm-8 cm. With such a smaller distance, the defoaming effect is better.

[0064] For example, the distance between two adjacent defoaming columns 431 may be 5 cm, 6 cm, 7 cm or 8 cm.

[0065] Further, see Figure 3 The defoaming net 420 is arranged at an angle to the horizontal plane, and the angle a between the defoaming net 420 and the horizontal plane is 15°-20°. In this way, the effect of intercepting bubbles is better.

[0066] For example, the angle a between the defoaming net 420 and the horizontal plane may be 15°, 16°, 17°, 18°, 19° or 20°.

[0067] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Defoaming reaction tank, characterized in that, include: A tank body (100), wherein a stirring chamber (110) with an opening at the top is provided in the tank body (100), and the stirring chamber (110) is used to hold slurry and leaching agent; A sealing cover (200), the sealing cover (200) being arranged on the opening; A stirring device (300) comprises a stirring shaft (310) arranged in the tank body (100), a stirring paddle (320) arranged on the stirring shaft (310), and a rotation driving member (330), wherein the rotation driving member (330) is arranged on the outer wall of the sealing cover (200), and an output end of the rotation driving member (330) is connected to the stirring shaft (310) for driving the stirring shaft (310) to rotate; a defoaming device (400) disposed at one end of the stirring shaft (310) close to the sealing cover (200), wherein the defoaming device (400) is capable of puncturing bubbles; A spoiler (500) is provided on the inner peripheral wall of the stirring chamber (110) for hindering the flow of the slurry. The spoiler (500) extends along the axial direction of the tank body (100). A defoaming portion (510) is provided at one end of the spoiler (500) close to the sealing cover (200). The defoaming portion (510) is capable of puncturing bubbles.

2. The defoaming reaction tank according to claim 1, characterized in that The defoaming device (400) comprises: a connecting rod (410), wherein the middle portion of the connecting rod (410) is connected to the stirring shaft (310); Defoaming nets (420) are installed on both sides of the connecting rod (410) and the stirring shaft (310); The defoaming brush (430) is arranged on the connecting rod (410) and is located at the lower part of the defoaming net (420).

3. The defoaming reaction tank according to claim 2, characterized in that A plurality of defoaming columns (431) are arranged at intervals on the connecting rod (410), and the plurality of defoaming columns (431) form the defoaming brush (430), and the end of each defoaming column (431) is conical.

4. The defoaming reaction tank according to claim 2, characterized in that The defoaming net (420) is arranged at an angle to the horizontal plane, and the angle between the defoaming net (420) and the horizontal plane is 15°-20°.

5. The defoaming reaction tank according to claim 1, characterized in that The defoaming portion (510) is in a sawtooth shape.

6. The defoaming reaction tank according to claim 1, characterized in that The sealing cover (200) is provided with an exhaust hole (120) communicating with the stirring chamber (110) and the outside world. A defoamer (130) is provided at the exhaust hole (120). The exhaust hole (120) is communicated with an exhaust pipe.

7. The defoaming reaction tank according to claim 6, characterized in that The demister (130) is a cyclone demister.

8. The defoaming reaction tank according to claim 1, characterized in that The bottom of the tank body (100) is conical, and a discharge port (140) communicating with the stirring chamber (110) and the outside is provided at the lowest point of the bottom of the tank body (100).

9. The defoaming reaction tank according to claim 1, characterized in that: A slurry inlet (150) and a leaching agent inlet (160) are provided on the upper portion of the tank body (100), and both the slurry inlet (150) and the leaching agent inlet (160) are connected to the outside and the stirring chamber (110); and / or a transparent observation window (170) is provided on the tank body (100).

10. The defoaming reaction tank according to claim 1, characterized in that: A plurality of supporting legs (180) are provided at the bottom of the trough body (100) along the circumference of the trough body (100).

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