A high-efficiency mixing, clarifying and separating extraction device

Abstract

The invention discloses a high-efficiency mixing, clarifying and separating extraction device, which relates to the field of hydrometallurgy technology, solves the problem that the mixing chamber and the clarifying box of the traditional extraction box are integrated, the mixing chamber is a latent chamber structure, the aqueous phase and the organic phase enter the latent chamber, and enter the mixing chamber under the suction force formed by the disc turbine agitator, and there are technical problems such as the agitator diameter is small, the stirring speed is fast and the shear force is large, resulting in the local droplet cutting being too fine and not conducive to phase separation, and includes a primary mixing tank, a secondary mixing tank and an extraction and clarifying box, the secondary mixing tank is connected to the right side of the primary mixing tank through an outlet pipe a, and the extraction and clarifying box is connected to the right side of the secondary mixing tank through an outlet pipe b. The invention ensures the mixing effect and extraction efficiency of the organic and aqueous phases; can produce high-quality raffinate with an oil content of less than 10PPM; the sealing structure can prevent organic oxidation, ventilation is conducive to organic recovery, and reduces organic loss; the operation is safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of hydrometallurgy, and more specifically to the technical field of high-efficiency mixing, clarifying and separating extraction devices. Background Art

[0002] In the nickel-cobalt hydrometallurgical industry, the methods for solution purification usually include chemical precipitation, extraction, ion exchange, etc. The extraction method is a method of transferring a substance from one solvent to another by utilizing the difference in solubility or distribution coefficient of a substance in two immiscible solvents.

[0003] The mixing chamber of the traditional extraction box is integrated with the clarification box. The mixing chamber is a latent chamber structure. The aqueous phase and the organic phase enter the latent chamber and enter the mixing chamber under the suction force formed by the disc turbine agitator. The agitator has a small diameter, a fast stirring speed and a large shear force, which causes the local droplets to be cut too finely and is not conducive to phase separation. Summary of the invention

[0004] The purpose of the present invention is to propose a high-efficiency mixing, clarifying and separating extraction device, which has good mixing and separation characteristics and low entrainment of the dispersed phase through secondary mixing and double-screw agitator, low speed and low shear force; the special oil separator allows the dispersed phase to pass only from the bottom and longitudinal seams, thereby improving the extraction efficiency, clarification rate and oil-water separation effect, so as to solve the problems raised in the background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A high-efficiency mixing-clarification-separation extraction device comprises a primary mixing tank 1, a secondary mixing tank 2 and an extraction-clarification box 3. The secondary mixing tank 2 is connected to the right side of the primary mixing tank 1 through an outlet pipe a4, and the extraction-clarification box 3 is connected to the right side of the secondary mixing tank 2 through an outlet pipe b5. The primary mixing tank 1 and the secondary mixing tank 2 both comprise a tank cover, a tank body and a stirring device. The extraction-clarification box 3 comprises a box body with a box cover and a plurality of oil separators arranged in the box body.

[0007] The stirring device of the primary mixing tank 1 is a disc turbine stirrer 6, and the stirring device of the secondary mixing tank 2 is a double-screw ribbon stirrer 7. Both the disc turbine stirrer 6 and the double-screw ribbon stirrer 7 have variable speed and frequency control.

[0008] The tank cover of the primary mixing tank 1 is provided with a water phase inlet 8 and an organic phase inlet 9 .

[0009] The inlet of the outlet pipe a4 is arranged at the bottom of the primary mixing tank 1, the outlet of the outlet pipe a4 is arranged at the lower part of the secondary mixing tank 2, the inlet of the outlet pipe b5 is arranged at the middle part of the secondary mixing tank 2, and the outlet of the outlet pipe b5 is arranged at the upper left part of the extraction and clarification tank 3.

[0010] The outlet pipe b5 is provided with a threaded regulator 21, and the flow rate of the dispersed phase in the outlet pipe b5 is controlled by rotating the threaded regulator 21 up and down.

[0011] A vent 20 is provided on the box cover of the extraction clarification box 3, an overflow plate 10 is provided on the left side of the extraction clarification box 3, and an oil separator a11, an oil separator b12, and an oil separator c13 are provided on the right side of the overflow plate 10 in the extraction clarification box 3 from left to right. An overflow weir 14 is provided at the right end of the extraction clarification box 3, an observation port 15 is provided above the overflow weir 14, an organic outlet 16 is provided at the bottom of the overflow weir 14, and an aqueous phase outlet 17 is provided at the bottom of the right end of the extraction clarification box 3.

[0012] The oil separator a11, oil separator b12 and oil separator c13 are all CPVC screen plates, each of which is provided with a longitudinal strip seam with a spacing of 20 mm. The heights of the oil separator a11, oil separator b12 and oil separator c13 are 80%, 60% and 50% of the height of the extraction clarification box 3 respectively. The three oil separators are vertically welded in the extraction clarification box 3, and openings are left between the upper and lower sides of each oil separator and the extraction clarification box 3.

[0013] A support frame 18 is disposed at the bottom of the extraction and clarification box 3 , and a handrail 19 is disposed on the rear side of the support frame 18 .

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] 1. The present invention provides a disc turbine agitator and a double-screw ribbon agitator for secondary mixing, with low speed and low shear force, so that the dispersed phase has good mixing and separation characteristics and low entrainment; the specially arranged oil separator allows the dispersed phase to pass only from the bottom and the longitudinal seam, thereby improving the extraction efficiency, clarification rate and oil-water separation effect;

[0016] 2. The present invention arranges an overflow plate, an overflow weir and an oil separator in the extraction clarification box, so that the dispersed phase entering the extraction clarification box passes through the overflow plate and the three oil separators with upper and lower openings, so that the metal solution is separated and purified, and the water phase and the organic phase are completely separated. When the organic phase turns over the overflow weir, the water phase is further separated, and the organic phase flows out from the organic outlet;

[0017] 3. The box cover and the box body of the extraction clarification box set in the present invention are tightly sealed to prevent air from entering the box, promoting organic oxidation, and the organic waste gas is extracted from the vents to control small air volume and low negative pressure. The ventilation adopts a slight negative pressure and small flow rate, and the ventilation duct is tilted downward from the vents, which can prevent air from entering the box to oxidize organic matter, and at the same time, the condensed organic matter flows back to the clarification box for continued use, avoiding organic loss and recovering organic matter in the waste gas;

[0018] In summary, the present invention ensures the mixing effect and extraction efficiency of the organic and aqueous phases; can produce high-quality raffinate with an oil content of less than 10 PPM; the sealing structure can prevent organic oxidation, ventilation is conducive to organic recovery, and reduces organic loss; the operation is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] As shown in the figure: primary mixing tank 1; secondary mixing tank 2; extraction clarification tank 3; outlet pipe a4; outlet pipe b5; disc turbine agitator 6; double-screw belt agitator 7; water phase inlet 8; organic inlet 9; overflow plate 10; oil plate a11; oil separator b12; oil separator c13; overflow weir 14; observation port 15; organic outlet 16; water phase outlet 17; support frame 18; railing handrail 19; vent 20; threaded adjuster 21. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be explained that the directions or positional relationships indicated by the terms "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation of the present invention.

[0024] Example

[0025] like Figure 1The present embodiment provides a high-efficiency mixing and clarifying separation extraction device, comprising a primary mixing tank 1, a secondary mixing tank 2 and an extraction and clarification box 3, the extraction and clarification box is made of CPVC material, the secondary mixing tank 2 is connected to the right side of the primary mixing tank 1 through an outlet pipe a4, the extraction and clarification box 3 is connected to the right side of the secondary mixing tank 2 through an outlet pipe b5, the inlet of the outlet pipe a4 is arranged at the bottom of the primary mixing tank 1, the outlet of the outlet pipe a4 is arranged at the lower part of the secondary mixing tank 2, the inlet of the outlet pipe b5 is arranged in the middle of the secondary mixing tank 2, the outlet of the outlet pipe b5 is arranged at the upper left part of the extraction and clarification box 3, and a threaded regulator 21 is installed on the outlet pipe b5, the pipeline is internally threaded, and the regulator is externally threaded, and the flow rate of the dispersed phase in the outlet pipe b5 is controlled by rotating the threaded regulator 21; the primary mixing tank 1 and the secondary mixing tank 2 both include a tank cover, a tank body and a stirring device, the tank cover, the tank body and the pipe mouth are made of steel-lined polytetrafluoroethylene material, and the stirring device is made of steel-lined polytetrafluoroethylene material, and the extraction and clarification box 3 includes a box body with a box cover and three oil separators arranged in the box body.

[0026] The stirring device of the primary mixing tank 1 is a disc turbine stirrer 6, and the stirring device of the secondary mixing tank 2 is a double-screw ribbon stirrer 7. Both the disc turbine stirrer 6 and the double-screw ribbon stirrer 7 can be frequency-controlled. The tank cover of the primary mixing tank 1 is provided with a water phase inlet 8 and an organic phase inlet 9.

[0027] The cover of the extraction clarification box 3 is provided with a vent 20, an overflow plate 10 is provided on the left side of the extraction clarification box 3, and oil separator a11, oil separator b12, and oil separator c13 are provided on the right side of the overflow plate 10 in the extraction clarification box 3 from left to right. An overflow weir 14 is provided at the right end of the extraction clarification box 3, an observation port 15 is provided above the overflow weir 14, an organic outlet 16 is provided at the bottom of the overflow weir 14, and a water phase outlet 17 is provided at the bottom of the right end of the extraction clarification box 3. The dispersed phase entering the extraction clarification box passes through the overflow plate and the oil separator a, oil separator b, and oil separator c, so that the metal solution is separated and purified, and the water phase and the organic phase are completely separated. When the organic phase turns over the overflow weir, the water phase is further separated, and the organic phase flows out from the organic outlet, and the separated water phase flows out from the water phase outlet at the bottom of the extraction box.

[0028] The box cover and the box body of the extraction clarification box 3 are tightly sealed, and the ventilation adopts a slight negative pressure and a small flow rate to prevent air from entering the box and promote organic oxidation. The organic waste gas is extracted from the vent, and the small air volume and low negative pressure are controlled. The ventilation duct is tilted downward to the vent, which can prevent air from entering the box to oxidize the organic matter, and at the same time, the condensed organic matter flows back to the clarification box for continued use, avoiding organic loss and recovering the organic matter in the waste gas.

[0029] The oil separation plates a11, b12 and c13 are all CPVC sieve plates. Each oil separation plate is provided with longitudinal strip-shaped slits with a spacing of 20 mm. The heights of the oil separation plates a11, b12 and c13 are 80%, 60% and 50% of the height of the extraction clarification tank 3 respectively. Each oil separation plate is vertically welded in the extraction clarification tank 3, and openings are left between the upper and lower sides of each oil separation plate and the extraction clarification tank 3.

[0030] A steel support frame 18 is arranged at the bottom of the extraction clarification tank 3, and a railing handrail 19 is arranged at the rear side of the support frame 18. The steel support frame 18 and the railing handrail 19 ensure the safe operation of the workers.

[0031] The present invention ensures the mixing effect and extraction efficiency of the organic phase and the water phase; can produce high-quality raffinate with an oil content of less than 10 PPM; the sealed structure can prevent the oxidation of the organic matter, ventilation is beneficial to the recovery of the organic matter and reduces the organic matter loss; the operation is safe and reliable.

Claims

1. A high-efficiency mixing, clarifying and separating extraction device, comprising a primary mixing tank (1), a secondary mixing tank (2) and an extraction and clarifying tank (3), Features: The secondary mixing tank (2) is connected to the right side of the primary mixing tank (1) via an outlet pipe a (4), and the extraction clarification tank (3) is connected to the right side of the secondary mixing tank (2) via an outlet pipe b (5). Both the primary mixing tank (1) and the secondary mixing tank (2) include a tank cover, a tank body, and a stirring device. The extraction clarification tank (3) includes a tank body with a tank cover and a plurality of oil separators arranged in the tank body. The stirring device of the primary mixing tank (1) is a disc turbine stirrer (6), and the stirring device of the secondary mixing tank (2) is a double-screw ribbon stirrer (7). Both the disc turbine stirrer (6) and the double-screw ribbon stirrer (7) have variable speed frequency control. The tank cover of the primary mixing tank (1) is provided with an aqueous phase inlet (8) and an organic phase inlet (9); The inlet of the outlet pipe a (4) is arranged at the bottom of the primary mixing tank (1), the outlet of the outlet pipe a (4) is arranged at the lower part of the secondary mixing tank (2), the inlet of the outlet pipe b (5) is arranged at the middle part of the secondary mixing tank (2), and the outlet of the outlet pipe b (5) is arranged at the upper left part of the extraction clarification tank (3); A threaded regulator (21) is installed on the outlet pipe b (5), and the flow rate of the dispersed phase in the outlet pipe b (5) is controlled by rotating the threaded regulator (21) up and down; A vent (20) is provided on the cover of the extraction clarification box (3); an overflow plate (10) is provided on the left side of the extraction clarification box (3); an oil separator a (11), an oil separator b (12), and an oil separator c (13) are provided in sequence from left to right on the right side of the overflow plate (10) inside the extraction clarification box (3); an overflow weir (14) is provided at the right end of the extraction clarification box (3); an observation port (15) is provided above the overflow weir (14); an organic outlet (16) is provided at the bottom of the overflow weir (14); and a water phase outlet (17) is provided at the bottom of the right end of the extraction clarification box (3); The oil separator a (11), the oil separator b (12) and the oil separator c (13) are all CPVC screen plates. Each oil separator is provided with a longitudinal strip slit with a spacing of 20 mm. The heights of the oil separator a (11), the oil separator b (12) and the oil separator c (13) are 80%, 60% and 50% of the height of the extraction clarification box (3) respectively. The three oil separators are vertically welded to the extraction clarification box (3). An opening is left between the upper and lower sides of each oil separator and the extraction clarification box (3). A support frame (18) is provided at the bottom of the extraction and clarification box (3), and a handrail (19) is provided on the upper rear side of the support frame (18).

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