Uranium purification extraction tank and emulsion reduction transfer method for uranium purification extraction tank

Abstract

The present application relates to the technical field of uranium purification extraction, and particularly relates to a uranium purification extraction tank and an emulsified substance reduction and transfer method of the uranium purification extraction tank. The uranium purification extraction tank is provided with an A type structure or a B type structure between adjacent clarification chambers and mixing chambers, and is provided with a C type or D type structure at the last clarification chamber; a stirring device is arranged in the mixing chamber. The uranium purification and treatment by using the uranium purification extraction tank can eliminate or reduce the generation of emulsified substances, can conveniently transfer the emulsified substances, can improve the stability of the system, and can improve the applicability of the tank type extraction equipment under radioactive conditions and other complex conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of uranium purification extraction, in particular to a uranium purification extraction tank and an emulsion reduction and transfer method for the uranium purification extraction tank. BACKGROUND

[0002] Solvent extraction is an important separation process technology for uranium purification and uranium extraction, and it also has important applications in non-ferrous metallurgy, rare earth separation and other fields. Its equipment generally includes uranium column extraction equipment and tank extraction equipment. The process is generally a continuous countercurrent process or a multistage countercurrent process. Continuous countercurrent operation generally uses column extraction equipment, and multistage countercurrent operation generally uses a multistage countercurrent mixing and clarifying tank.

[0003] In the selection of uranium purification extraction equipment, column equipment is the mainstream. Column equipment has the advantages of small floor area and good material sealing. In terms of mass transfer performance, due to the reciprocating motion of the pulse, the mixing intensity is uniform, the difference between the mixing intensities of the particles is small, there is no over-crushing phenomenon, and the generation of emulsions is reduced. The generated emulsions accumulate at the interface, and the column equipment has only one interface whether the organic phase or the aqueous phase is continuous, which is at the top of the column or at the bottom of the column. The accumulated emulsions can be easily removed without cleaning the column.

[0004] However, column uranium purification equipment also has many disadvantages, such as high mass transfer unit, complex equipment amplification law, precise operation control requirements, complex start-up and shutdown, etc.

[0005] The mixing and clarifying tank has the advantages of small space height, good phase contact, high stage efficiency, large treatment capacity, good operation flexibility, stable operation in a wide flow ratio range, and reliable expansion design method, but has the disadvantages of large liquid holdup, large one-time investment, and large plant floor area.

[0006] For uranium purification, the more important thing is that the multistage countercurrent mixing and clarifying tank has a control interface at each stage due to its structural characteristics. Emulsions accumulate at the interface and form an emulsion layer. If the amount of emulsions generated is large, the accumulation speed of emulsions is fast, or the accumulation amount of emulsions is large, the extraction will be difficult to operate stably. Since emulsion accumulation may occur at each stage, the reduction and transfer of emulsions in the mixing and clarifying tank are particularly important in the case of uranium purification and other conditions with radioactivity or other harsh requirements.

[0007] In addition, the stirring of the extraction tank will be more intense compared with the column, which will generally increase the amount of emulsions generated. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a uranium purification extraction tank and a uranium purification extraction tank emulsion reduction and transfer method, which can eliminate or reduce the generation of emulsions, conveniently transfer the emulsions, improve the stability of the system, and improve the applicability of the tank type extraction equipment under radioactive conditions and other complex conditions.

[0009] The present application provides a uranium purification extraction tank, which is provided with an A type structure or a B type structure between adjacent clarification chambers and mixing chambers, and is provided with a C type or D type structure at the last clarification chamber; a stirring device is arranged in the mixing chamber.

[0010] The A type structure is that a partition plate separates the i-1 stage clarification chamber and the i stage mixing chamber water phase inlet to form an independent area; the partition plate is provided with an emulsion valve A1 at the water phase-organic phase interface height position, and is provided with a water phase valve A2 at the bottom; the emulsion valve A1 and the water phase valve A2 are communicated with the i-1 stage clarification chamber and the isolated area; a gravity leg A3 is arranged in the isolated area, and the height of the gravity leg A3 can be adjusted; a water phase high-speed channel A4 is arranged between the rear side of the gravity leg A3 and the mixing chamber water phase inlet, one end of the water phase high-speed channel A4 is connected with the mixing chamber water phase inlet, and the other end of the water phase high-speed channel A4 is upwardly opened;

[0011] The B type structure is that:

[0012] The i-1 stage clarification chamber and the i stage mixing chamber water phase inlet are separated by a water phase weir plate B2 to form a half-independent weir plate rear chamber B3; the water phase weir plate B2 is closely combined with the bottom plate, and the height is the clarification chamber water phase interface height; the weir plate rear chamber B3 is communicated with the mixing chamber water phase inlet; an adjusting valve B1 is arranged in the mixing chamber water phase inlet, and the B1 can adjust the opening degree of the mixing chamber water phase inlet;

[0013] The C type structure is that:

[0014] In the clarification chamber, two independent areas are separated by a partition plate and a peripheral side plate, which are a water phase discharge function area and an emulsion discharge function area; a valve C1 is arranged at the bottom of the partition plate between the clarification chamber and the water phase discharge function area; a valve C2 is arranged at the middle of the partition plate between the clarification chamber and the emulsion discharge function area; a gravity leg C3 is arranged in the water phase discharge function area, and the height of the gravity leg C3 can be adjusted; a gravity leg C4 is arranged in the emulsion discharge function area, and the height of the gravity leg C4 can be adjusted; the lower part of the rear side area of the gravity leg C3 is connected with a water phase outlet C5; the lower part of the rear side area of the gravity leg C4 is connected with an emulsion outlet C6;

[0015] The D type structure is that:

[0016] In the clarification chamber, two independent areas are isolated by the partition and the peripheral side plate, which are water phase discharge function area and emulsion discharge function area respectively; in the clarification chamber, the area between the two partitions is the clarification area, two weir plates D5 are arranged to form a weir plate rear chamber; the weir plate D5 is closely combined with the bottom plate, and the height is the height of the water phase-organic phase interface of the clarification chamber; a channel is arranged at the bottom of the partition to connect the weir plate rear chamber with the two function areas; a gravity leg D3 is arranged in the water phase discharge function area, and the height of the gravity leg D3 can be adjusted; a gravity leg D4 is arranged in the emulsion discharge function area, and the height of the gravity leg D4 can be adjusted; the lower part of the rear area of the gravity leg D3 is connected with a water phase outlet, and the water phase outlet is provided with a valve D1; the lower part of the rear area of the gravity leg D4 is connected with an emulsion outlet, and the emulsion outlet is provided with a valve D2.

[0017] 15 >= i >= 2, and i is an integer.

[0018] In the A type structure, the height of the water phase high-speed channel A4 is lower than the height of the gravity leg A3.

[0019] In the B type structure, the height of the water phase weir plate B2 is the height of the water phase-organic phase interface of the clarification chamber or the height of the water phase-emulsion interface.

[0020] The application provides a kind of emulsion reduction and transfer method of uranium purification extraction tank, and the device described in above technical scheme is used to reduce and transfer emulsion.

[0021] When the device includes A type structure, the rotating speed of stirring paddle in i-stage mixing chamber is adjusted, or emulsion valve A1 is opened, so that emulsion enters mixing chamber with water phase; in mixing chamber, emulsion is stirred and two-phase washing and dissolution are carried out.

[0022] During operation, the position of gravity leg A3 is adjusted, so that water phase-organic phase interface is higher than the position of emulsion valve A1, or the center line of emulsion layer is stably positioned at the upper edge of emulsion valve A1; when the thickness of emulsion is sufficient, emulsion valve A1 is opened, water phase valve A2 is closed, and emulsion is transferred to i-stage mixing chamber; emulsion valve A1 is closed and water phase valve A2 is opened to stop transfer.

[0023] The channel linear velocity v is greater than or equal to 0.05 m / s,

[0024] Wherein, v is channel linear velocity, S A Water phase channel cross-sectional area, Q A Water phase flow.

[0025] When the device includes B type structure, the rotating speed of stirring paddle in i-stage mixing chamber is adjusted, or the opening of emulsion valve B1 is opened, so that emulsion enters mixing chamber with water phase; in mixing chamber, emulsion is stirred and two-phase washing and dissolution are carried out.

[0026] Stop transferring, call back the opening of emulsion valve B1 or stirring speed.

[0027] The B type structure device is intermittently operated or continuously operated; in continuous operation, the organic phase reflux rate is controlled without emulsion;

[0028] The organic phase reflux rate is the ratio of the transferred amount of the organic phase to the total flow rate, and the organic phase reflux rate is less than 5%.

[0029] When the C type structure is included in the device, in operation, valve C1 is opened, valve C2 is closed, the height of gravity leg C3 is adjusted to ensure that the center line of the emulsion layer is at the upper edge position of valve C2 or the interface is at the upper edge position of valve C2 without emulsion; valve C1 is closed, valve C2 is opened, the height of gravity leg C4 is adjusted to ensure that the emulsion can be transferred, and the height of the emulsion layer center is kept unchanged; in normal operation, the positions of gravity leg C3 and gravity leg C4 are unchanged, valve C1 is opened and valve C2 is closed, the water phase is discharged, valve C1 is closed and valve C2 is opened, and the emulsion is discharged.

[0030] When the D type structure is included in the device, valve D1 is opened, valve D2 is closed, and the height of gravity leg D3 is adjusted to ensure the normal height of the interface; valve D1 is closed, valve D2 is opened, and the height of gravity leg D4 is adjusted to ensure that the emulsion can be transferred; in normal operation, the positions of gravity leg D3 and gravity leg D4 are unchanged, valve D1 is opened and valve D2 is closed, the water phase is discharged, valve D1 is closed and valve D2 is opened, and the emulsion is discharged.

[0031] Compared with the prior art, the uranium purification extraction tank and the emulsion reduction and transfer method of the uranium purification extraction tank have the following beneficial effects:

[0032] (1) The emulsion enters the mixing chamber for re-stirring, and a certain degree of reduction can be achieved;

[0033] (2) The interstage transfer of the emulsion in the extraction tank is realized by continuous or intermittent methods, and the interface and the system are kept stable during the transfer process;

[0034] (3) The discharge of the emulsion can be realized by only opening and closing the valve. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 A schematic diagram of the A type structure is shown;

[0036] Fig. 2 A schematic diagram of the B type structure is shown;

[0037] Fig. 3 A schematic diagram of the C type structure is shown;

[0038] Fig. 4 A schematic diagram of the D type structure is shown;

[0039] In the figure,

[0040] 1-clarification chamber, 2-mixing chamber, 3-emulsion valve A1, 4-water phase valve A2, 5-gravity leg A3, 6-water phase high-speed channel A4, 7-valve B1, 8-water phase weir B2, 9-weir back chamber B3, 10-valve C1, 11-valve C2, 12-gravity leg C3, 13-gravity leg C4, 14-water phase outlet C5, 15-emulsion outlet C6, 16-valve D1, 17-valve D2, 18-gravity leg D3, 19-gravity leg D4, 20-weir D5. DETAILED DESCRIPTION

[0041] In order to further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than for limiting the present invention.

[0042] The embodiment of the present invention discloses a uranium purification extraction tank, such as Figs. 1-4 As shown, an A-type structure or a B-type structure is provided between adjacent clarifying chambers (1) and mixing chambers (2), and a C-type or D-type structure is provided at the end of the clarifying chamber (1); a stirring device is provided in the mixing chamber (2);

[0043] The A-type structure is as follows: a partition is used to isolate an independent area between the i-1 level clarification chamber (1) and the water phase inlet of the i-level mixing chamber (2); an emulsion valve A1 (3) is provided at the height of the water phase-organic phase interface of the partition, and a water phase valve A2 (4) is provided at the bottom of the partition, and the emulsion valve A1 (3) and the water phase valve A2 (4) connect the i-1 level clarification chamber (1) with the isolation area; a gravity leg A3 (5) is provided in the isolation area, and the height of the gravity leg A3 (5) can be adjusted; a water phase high-speed channel A4 (6) is provided in the area between the rear side of the gravity leg A3 (5) and the water phase inlet of the mixing chamber (2), one end of the water phase high-speed channel A4 (6) is connected to the water phase inlet of the mixing chamber (2), and the other end of the water phase high-speed channel A4 (6) is open upward;

[0044] In the A-type structure, the height of the water phase high-speed channel A4 (6) is lower than the height of the gravity leg A3 (5);

[0045] The B-type structure is:

[0046] A water phase weir plate B2 (8) is used to separate the i-1 level clarification chamber (1) and the i level mixing chamber (2) water phase inlet to form a semi-independent weir plate rear chamber B3 (9); the water phase weir plate B2 (8) is tightly combined with the bottom plate, and its height is the height of the water phase interface of the clarification chamber (1); the weir plate rear chamber B3 (9) is connected to the water phase inlet of the mixing chamber (2); a regulating valve B1 (7) is set at the water phase inlet of the mixing chamber (2), and the valve B1 (7) can adjust the opening of the water phase inlet of the mixing chamber (2);

[0047] In the type B structure, the height of the water phase weir plate B2 (8) is the height of the interface between the water phase and the organic phase in the clarification chamber or the height of the interface between the water phase and the emulsion;

[0048] The C-type structure is:

[0049] In the clarification chamber (1), two independent areas are separated by a partition and an outer side plate, namely a water phase discharge functional area and an emulsion discharge functional area; the valve C1 (10) is located at the bottom of the partition between the clarification chamber (1) and the water phase discharge functional area; the valve C2 (11) is located in the middle of the partition between the clarification chamber (1) and the emulsion discharge functional area; a gravity leg C3 (12) is provided in the water phase discharge functional area, and the gravity leg C3 (12) is adjustable in height; a gravity leg C4 (13) is provided in the emulsion discharge functional area, and the gravity leg C4 (13) is adjustable in height; the lower part of the rear area of ​​the gravity leg C3 (12) is connected to the water phase outlet C5 (14); the lower part of the rear area of ​​the gravity leg C4 (13) is connected to the emulsion outlet C6 (15);

[0050] The D-type structure is:

[0051] In the clarification chamber (1), two independent areas are separated by partitions and outer side plates, namely, a water phase discharge functional area and an emulsion discharge functional area; in the clarification chamber (1), the clarification area is between the two partitions, and two weir plates D5 (20) are set to form a weir plate rear chamber; the weir plate D5 (20) is tightly combined with the bottom plate, and the height is the height of the water phase-organic phase interface of the clarification chamber; a channel is set at the bottom of the partition to connect the weir plate rear chamber with the two functional areas; a gravity leg D3 (18) is set in the water phase discharge functional area, and the gravity leg D3 (18) is adjustable in height; a gravity leg D4 (19) is set in the emulsion discharge functional area, and the gravity leg D4 (19) is adjustable in height; the lower part of the rear area of ​​the gravity leg D3 (18) is connected to the water phase outlet, and the water phase outlet is provided with a valve D1 (16); the lower part of the rear area of ​​the gravity leg D4 (19) is connected to the emulsion outlet, and the emulsion outlet is provided with a valve D2 (17);

[0052] 15≥i≥2, and i is an integer.

[0053] In the present application, the emulsions appear at the contact surface of the organic phase and the aqueous phase, and the transfer and reduction of the emulsions are realized through the A-type structure or the B-type structure, and the emulsions are transferred out of the extraction tank through the C-type structure or the D-type structure.

[0054] The uranium purification extraction tank is composed of multiple-stage tanks, and each stage tank comprises a clarification chamber (1) and a mixing chamber (2). The A-type or B-type structure connects the mixing chamber (2) of the extraction tank of the present stage and the clarification chambers (1) of the upper and lower stages. The C-type or D-type structure connects the clarification chamber (1) of the last stage of the extraction tank and the pipeline outside.

[0055] The embodiment of the present application discloses a method for reducing and transferring emulsions in a uranium purification extraction tank.

[0056] When the A-type structure is included in the device, the rotation speed of the stirring paddle in the i-stage mixing chamber (2) is adjusted, or the emulsion valve A1 (3) is opened, so that the emulsions enter the mixing chamber (2) along with the aqueous phase; in the mixing chamber (2), the emulsions are stirred and dispersed, and the two phases are washed and dissolved;

[0057] During operation, the position of the gravity leg A3 is adjusted, so that the water-organic phase interface is higher than the position of the emulsion valve A1 (3), or the center line of the emulsion layer is stably positioned at the upper edge of the emulsion valve A1 (3); after the thickness of the emulsions is sufficient, the emulsion valve A1 (3) is opened, the aqueous phase valve A2 (4) is closed, and the emulsions are transferred into the i-stage mixing chamber (2); the emulsion valve A1 (3) is closed and the aqueous phase valve A2 (4) is opened to stop the transfer.

[0058] The channel linear velocity v is greater than or equal to 0.05 m / s,

[0059] Wherein v is the channel linear velocity, S A The aqueous phase channel cross-sectional area, Q A The aqueous phase flow rate.

[0060] When the B-type structure is included in the device, the rotation speed of the stirring paddle in the i-stage mixing chamber (2) is adjusted, or the opening of the emulsion valve B1 (7) is opened, so that the emulsions enter the mixing chamber (2) along with the aqueous phase; in the mixing chamber (2), the emulsions are stirred and dispersed, and the two phases are washed and dissolved;

[0061] When the transfer is stopped, the opening of the emulsion valve B1 (7) or the stirring speed is adjusted.

[0062] The B-type structure device is intermittently operated or continuously operated; when continuously operated, the organic phase backflow rate is controlled in the absence of emulsions;

[0063] The organic phase backflow rate is the ratio of the transfer amount of the organic phase to the total flow rate, and the organic phase backflow rate is less than 5%.

[0064] When the device includes C-type structure, during operation, open valve C1 (10), close valve C2 (11), adjust the height of gravity leg C3 (12) to ensure that the center line of emulsion layer is at the upper edge of valve C2 (11) or the interface is at the upper edge of valve C2 when there is no emulsion; close valve C1 (10) and open valve C2 (11), adjust the height of gravity leg C4 (13) to ensure that emulsion can be transferred, and keep the height of the center of emulsion layer unchanged; during normal operation, the positions of gravity leg C3 (12) and gravity leg C4 (13) remain unchanged, open valve C1 (10) and close valve C2 (11) to discharge water phase, and close valve C1 (10) and open valve C2 (11) to discharge emulsion.

[0065] When the device includes D-type structure, open valve D1 and close valve D2, adjust the height of gravity leg D3 (18) to ensure that the interface is at normal height; close valve D1 and open valve D2, adjust the height of gravity leg D4 (19) to ensure that emulsion can be transferred; during normal operation, the positions of gravity leg D3 (18) and gravity leg D4 (19) remain unchanged, open valve D1 and close valve D2 to discharge water phase, and close valve D1 and open valve D2 to discharge emulsion.

[0066] In order to further understand the present application, the uranium purification extraction tank and the emulsion reduction and transfer method of the uranium purification extraction tank provided by the present application are described in detail below in combination with examples, and the protection scope of the present application is not limited by the following examples.

[0067] Example 1

[0068] The uranium purification extraction tank is a 6-stage countercurrent structure. A B-type structure is arranged between each stage of the tank, i.e. between adjacent clarification chambers (1) and mixing chambers (2), and a D-type structure is arranged at the last clarification chamber (1). A stirring device is arranged in the mixing chamber (2).

[0069] B-type structure debugging: adjust the stirring speed of each stage to ensure normal mixing intensity, and fix it; adjust the opening degree of valve B1 (7) to ensure that the interface at chamber B3 (9) behind the weir plate of valve B1 (7) is between valve B1 (7) and weir plate B2 (8) of water phase, and record the opening degree of valve B1 (7) as SB1-1; adjust the opening degree of valve B1 to make emulsion transferable, and record the opening degree of valve B1 (7) as SB1-2. D-type structure debugging: close valve D2, open valve D1, adjust the height of gravity leg D3 (18) to ensure that the interface is at normal height, and record the height as HD3; close valve D1, open valve D2, adjust the height of gravity leg D4 (19) to ensure that emulsion can be transferred, and record the height as HD4.

[0070] Operation process. When the emulsion is less or does not need to be treated: the valve B1 (7) remains in the SB1-1 state, the valve D2 is closed and the valve D1 is opened. When the emulsion is more and needs to be treated: the valve B1 (7) is adjusted to the SB1-2 state, the emulsion is transferred to the next stage mixing chamber (2) and is stirred to reduce; the valve D1 is closed and the valve D2 is opened, and the emulsion is discharged from the extraction tank.

[0071] Example 2

[0072] The uranium purification extraction tank is a 5-stage countercurrent structure. A type structure is arranged between the tanks of each stage, i.e. between the adjacent clarification chambers (1) and mixing chambers (2), and a C type structure is arranged at the endmost clarification chamber (1); a stirring device is arranged in the mixing chamber (2);

[0073] Debugging process. A type structure debugging: during the operation process, the position of the gravity leg A3 is adjusted to HA3-1, so that the water-organic phase interface is slightly higher than the position of the emulsion valve A1 (3), or the center line of the emulsion layer is stably positioned at the upper edge of the emulsion valve A1 (3). C type structure debugging: the valve C2 (11) is closed and the valve C1 (10) is opened, the height of the gravity leg C3 (12) is adjusted to HC3 to ensure that the center line of the emulsion layer is at the upper edge of the valve C2 (11) or the interface is at the upper edge of the valve C2 (11) when there is no emulsion; the valve C1 (10) is closed and the valve C2 (11) is opened, the height of the gravity leg C4 (13) is adjusted to HC4 to ensure that the emulsion can be transferred and the center height of the emulsion layer remains unchanged.

[0074] Operation process: when the emulsion is less or does not need to be treated: the emulsion valve A1 (3) is closed and the water phase valve A2 (4) is opened, the valve C2 (11) is closed and the valve C1 (10) is opened. When the emulsion is more and needs to be treated: the water phase valve A2 (4) is closed and the emulsion valve A1 (3) is opened, the emulsion is transferred to the next stage mixing chamber (2) and is stirred to reduce; the valve C1 (10) is closed and the valve C2 (11) is opened, and the emulsion is transferred out of the device through the emulsion outlet C6 (15); after the transfer is completed, the emulsion valve A1 (3) is closed, the water phase valve A2 (4) is opened, the valve C2 (11) is closed and the valve C1 (10) is opened.

[0075] Example 3

[0076] The uranium purification extraction tank is a 10-stage countercurrent structure. A B type structure is arranged between the tanks of each stage, i.e. between the adjacent clarification chambers (1) and mixing chambers (2), and a C type structure is arranged at the endmost clarification chamber (1); a stirring device is arranged in the mixing chamber (2);

[0077] B type structure debugging: adjust the stirring speed, measure the mixing intensity to meet the requirements of the stirring paddle speed range: RMIN~RMAX; adjust the opening of valve B1 (7), ensure that the interface at the weir plate back chamber B3 (9) is in the middle of valve B1 (7) and water phase weir plate B2 (8), and record the opening of valve B1 (7) as SB1-1, adjust the opening of the invention B1, so that the emulsion can be transferred, and record the opening of valve B1 (7) as SB1-2. Make the stirring speed under the condition of RB-2, so that the emulsion can be transferred; wherein RMIN<RB-1<RB-2<RMAX is met.

[0078] C type structure debugging: close valve C2 (11), open valve C1 (10), adjust the height of gravity leg C3 (12) to HC3, ensure that the center line of the emulsion layer is at the upper edge position of valve C2 (11), or the interface is at the upper edge position of valve C2 (11) when there is no emulsion; close valve C1 (10), open valve C2 (11), adjust the height of gravity leg C4 (13) to HC4 to ensure that the emulsion can be transferred, and the center height of the emulsion layer remains unchanged.

[0079] Operation process:

[0080] When there is little or no emulsion to be treated: the stirring paddle speed is kept at RB-1, valve C2 (11) is closed, and valve C1 (10) is opened. When there is more emulsion to be treated: the stirring paddle speed is adjusted to RB-2, the emulsion is transferred to the next stage mixing chamber (2), and the stirring is reduced; valve C2 (11) is opened, valve C1 is closed, and the emulsion is transferred out of the device through emulsion outlet C6 (15); after the transfer is completed, the stirring paddle speed is kept at RB-1, valve C1 (10) is opened, and valve C2 (11) is closed.

[0081] Example 4

[0082] The uranium purification extraction tank is a 10-stage countercurrent structure. A type structure is arranged between the stages of the tank, i.e. between the adjacent clarification chambers (1) and mixing chambers (2), and a D type structure is arranged at the last clarification chamber (1); a stirring device is arranged in the mixing chamber (2);

[0083] Debugging process. A type structure debugging: adjust the position of gravity leg A3 to HA3-1 during operation, so that the water-organic phase interface is slightly higher than the position of emulsion valve A1 (3), or the center line of the emulsion layer is stably positioned at the upper edge of the emulsion valve A1 (3).

[0084] D type structure debugging: close valve D2, open valve D1, adjust the height of gravity leg D3 (18) to ensure the normal height of interface, record the height as HD3; close valve D1, open valve D2, adjust the height of gravity leg D4 (19) to ensure the transfer of emulsion, record the height as HD4.

[0085] Operation process:

[0086] When the emulsion is less or does not need to be treated: close emulsion valve A1 (3), open water phase valve A2 (4), close valve D2, and open valve D1.

[0087] When the emulsion is more and needs to be treated: close water phase valve A2 (4), open emulsion valve A1 (3), the emulsion is transferred to the next stage of mixing and stirring for reduction; close valve D1, open valve D2, and the emulsion is discharged from the extraction tank.

[0088] The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be noted that for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0089] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A uranium purification extraction tank, characterized in that: An A-type structure or a B-type structure is provided between adjacent clarification chambers and mixing chambers, and a C-type or D-type structure is provided at the end of the clarification chamber; a stirring device is provided in the mixing chamber; The A-type structure is as follows: a partition is used to isolate the i-1 level clarification chamber and the i-level mixing chamber water phase inlet into an independent area; the partition is provided with an emulsion valve A1 at the height of the water phase-organic phase interface, and a water phase valve A2 is provided at the bottom of the partition, and the emulsion valve A1 and the water phase valve A2 connect the i-1 level clarification chamber and the isolation area; a gravity leg A3 is provided in the isolation area, and the gravity leg A3 can be adjusted in height; a water phase high-speed channel A4 is provided in the area between the rear side of the gravity leg A3 and the water phase inlet of the mixing chamber, and one end of the water phase high-speed channel A4 is connected to the water phase inlet of the mixing chamber, and the other end of the water phase high-speed channel A4 is open upward; The B-type structure is: A water phase weir plate B2 is used to separate the i-1 level clarification chamber from the water phase inlet of the i-level mixing chamber to form a semi-independent weir plate rear chamber B3; the water phase weir plate B2 is tightly integrated with the bottom plate, and its height is the height of the water phase interface of the clarification chamber; the weir plate rear chamber B3 is connected to the water phase inlet of the mixing chamber; a regulating valve B1 is installed at the water phase inlet of the mixing chamber, and B1 can adjust the opening of the water phase inlet of the mixing chamber; The C-type structure is: The clarification chamber is separated into two independent areas by a partition and an outer side panel: a water phase discharge area and an emulsion discharge area. Valve C1 is located at the bottom of the partition between the clarification chamber and the water phase discharge area. Valve C2 is located in the middle of the partition between the clarification chamber and the emulsion discharge area. A height-adjustable gravity leg C3 is provided in the water phase discharge area. A height-adjustable gravity leg C4 is provided in the emulsion discharge area. The lower portion of the rear area of ​​gravity leg C3 is connected to the water phase outlet C5. The lower portion of the rear area of ​​gravity leg C4 is connected to the emulsion outlet C6. The D-type structure is: The clarification chamber is separated into two independent areas by partitions and outer side panels: the water phase discharge functional area and the emulsion discharge functional area. The clarification area is located between the two partitions in the clarification chamber, and two weir plates D5 are installed to form a weir plate rear chamber. The weir plate D5 is tightly integrated with the bottom plate and is at the height of the water-organic phase interface of the clarification chamber. A channel is provided at the bottom of the partition to connect the weir plate rear chamber with the two functional areas. The water phase discharge functional area is provided with a gravity leg D3, and the gravity leg D3 is adjustable in height. The emulsion discharge functional area is provided with a gravity leg D4, and the gravity leg D4 is adjustable in height. The lower part of the rear area of ​​gravity leg D3 is connected to the water phase outlet, which is equipped with valve D1. The lower part of the rear area of ​​D4 is connected to the emulsion outlet, which is equipped with valve D2. 15≥i≥2, and i is an integer.

2. The uranium purification extraction tank according to claim 1, characterized in that: In the A-type structure, the height of the water phase high-speed channel A4 is lower than the height of the gravity leg A3.

3. The uranium purification extraction tank according to claim 1, characterized in that: In the type B structure, the height of the water phase weir plate B2 is the height of the interface between the water phase and the organic phase in the clarification chamber or the height of the interface between the water phase and the emulsion.

4. A method for reducing and transferring emulsion in a uranium purification extraction tank, characterized in that: The emulsion is reduced and transferred using the device described in any one of claims 1 to 3.

5. The method for reducing and transferring emulsion in a uranium purification extraction tank according to claim 4, characterized in that: When the device includes the A-type structure, the rotation speed of the stirring blade in the i-stage mixing chamber is adjusted, or the emulsion valve A1 is opened, so that the emulsion enters the mixing chamber along with the water phase; in the mixing chamber, the emulsion is stirred and the two phases are washed and dissolved; During operation, the position of gravity leg A3 is adjusted so that the aqueous-organic phase interface is higher than the position of emulsion valve A1, or the center line of the emulsion layer is stably located at the upper edge of emulsion valve A1; when the emulsion thickness is sufficient, emulsion valve A1 is opened, aqueous phase valve A2 is closed, and the emulsion is transferred to the i-stage mixing chamber; the transfer is stopped by closing emulsion valve A1 and opening aqueous phase valve A2.

6. The method for reducing and transferring emulsions in a uranium purification extraction tank according to claim 5, characterized in that: The channel linear velocity ν≥0.05m / s, Where ν channel linear velocity, S A Cross-sectional area of ​​aqueous phase channel, Q A Water phase flow rate.

7. The method for reducing and transferring emulsion in a uranium purification extraction tank according to claim 4, characterized in that: When the device includes the B-type structure, the rotation speed of the stirring blade in the i-stage mixing chamber is adjusted, or the opening of the emulsion valve B1 is opened, so that the emulsion enters the mixing chamber along with the water phase; in the mixing chamber, the emulsion is stirred and the two phases are washed and dissolved; When the transfer is stopped, the opening of the emulsion valve B1 or the stirring speed is adjusted back.

8. The method for reducing and transferring emulsions in a uranium purification extraction tank according to claim 7, characterized in that: The B-type structure device can be operated intermittently or continuously; when operated continuously, the reflux rate of the organic phase is controlled in the absence of emulsions; Organic phase reflux rate = ratio of organic phase transfer volume / total flow rate, organic phase reflux rate <5%.

9. The method for reducing and transferring emulsions in a uranium purification extraction tank according to claim 4, characterized in that: When the device includes a C-shaped structure, during operation, valve C1 is opened, valve C2 is closed, and the height of gravity leg C3 is adjusted to ensure that the center line of the emulsion layer is at the upper edge of valve C2, or the interface is at the upper edge of valve C2 when there is no emulsion; valve C1 is closed and valve C2 is opened, and the height of gravity leg C4 is adjusted to ensure that the emulsion can be transferred and the height of the center of the emulsion layer remains unchanged; during normal operation, the positions of gravity leg C3 and gravity leg C4 remain unchanged, valve C1 is opened and valve C2 is closed to discharge the water phase, and valve C1 is closed and valve C2 is opened to discharge the emulsion.

10. The method for reducing and transferring emulsions in a uranium purification extraction tank according to claim 4, characterized in that: When the device includes a D-shaped structure, valve D1 is opened, valve D2 is closed, and the height of gravity leg D3 is adjusted to ensure a normal interface height; valve D1 is closed and valve D2 is opened, and the height of gravity leg D4 is adjusted to ensure that the emulsion can be transferred; during normal operation, the positions of gravity leg D3 and gravity leg D4 remain unchanged, valve D1 is opened and valve D2 is closed, the water phase is discharged, and valve D1 is closed and valve D2 is opened to discharge the emulsion.

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