Sea discharge pipeline structure and lithium extraction method

Abstract

The application provides a seawater discharge pipeline structure and a lithium extraction method, and belongs to the technical field of seawater lithium extraction. The seawater discharge pipeline structure comprises a pipeline body with a seawater discharge port; a screen is arranged at the tail section of the pipeline body and is located upstream of the seawater discharge port; a feeding port is formed on the pipeline body at a position upstream of the screen, the feeding port is communicated with the tail section of the pipeline body, and the feeding port is suitable for adding an adsorbent into the pipeline body. The seawater discharge pipeline structure provided by the application improves the tail section of the pipeline body, increases the screen, fills the adsorbent in the pipeline body, intercepts the adsorbent by the screen, adsorbs lithium ions in seawater discharge concentrated brine on the adsorbent through the screen and the adsorbent, extracts lithium in the seawater discharge concentrated brine, has almost no energy consumption, has no negative influence on the original concentrated brine process, and only increases the screen at the rear-end pipeline structure to intercept the adsorbent, thereby improving the utilization rate of the discharged concentrated brine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seawater lithium extraction, and particularly relates to a seawater discharge pipeline structure and a lithium extraction method. BACKGROUND

[0002] With the implementation of large-scale seawater desalination projects, the discharge of a large amount of high-salinity concentrated seawater has attracted people's attention. With the improvement of the lithium ion sieve lithium extraction capacity, the feasibility of seawater lithium extraction is becoming higher and higher. In particular, many facilities with large-scale seawater desalination capacity such as seawater desalination plants and nuclear power plants have seawater discharge concentrated brine with a lithium concentration higher than that of general seawater, and also have a flow rate, which is the most valuable seawater. SUMMARY

[0003] Therefore, the present application provides a seawater discharge pipeline structure and a lithium extraction method.

[0004] To solve the above technical problems, the present application provides a seawater discharge pipeline structure, comprising:

[0005] a pipeline body, a tail section of the pipeline body has a seawater discharge port in the seawater discharge direction;

[0006] a sieve screen, the sieve screen is arranged in the tail section of the pipeline body, and the sieve screen is located upstream of the seawater discharge port;

[0007] an inlet is arranged on the pipeline body at a position upstream of the sieve screen, the inlet is communicated with the tail section of the pipeline body, and the inlet is suitable for adding an adsorbent into the pipeline body.

[0008] Optionally, a net bag is further arranged, and the net bag is detachably connected to the seawater discharge port of the pipeline body.

[0009] Optionally, the tail section of the pipeline body has a buffer section with an inner diameter larger than that of the pipeline body.

[0010] The sieve screen is arranged in the buffer section.

[0011] Optionally, the sieve screen is rotatably arranged in the buffer section.

[0012] The sieve screen has a blocking state in which the sieve screen is rotated to be parallel to the cross section of the buffer section to prevent the adsorbent from passing through, and the sieve screen has an open state in which the sieve screen is rotated to be perpendicular to the cross section of the buffer section to allow the adsorbent to pass through.

[0013] Optionally, a knob is arranged on the outside of the pipeline body, the knob is connected with the sieve screen, and the knob is suitable for driving the sieve screen to rotate to switch between the blocking state and the open state.

[0014] Optionally, the screen circumference is provided with a frame, the screen is rotatably installed in the pipeline body through the frame, and the knob is connected with the frame.

[0015] The lithium extraction method also comprises the sea outlet pipeline structure, and further comprises the following steps:

[0016] The screen is installed at the tail section of the pipeline body, the adsorbent is fed into the pipeline body through the feeding port, the screen blocks the adsorbent on one side, and after the adsorbent absorbs enough lithium, the adsorbent is collected to extract lithium.

[0017] Optionally, the method further comprises the step of setting a net bag at the sea outlet to receive the adsorbent.

[0018] Optionally, the state of the screen in the pipeline body is controlled through the knob.

[0019] The technical scheme of the present application has the following advantages:

[0020] 1. The sea outlet pipeline structure provided by the present application improves the tail section of the pipeline body, increases the screen, fills the adsorbent in the pipeline body, intercepts the adsorbent through the screen, adsorbs the lithium ions in the sea outlet concentrated brine on the adsorbent through the screen and the adsorbent, extracts the lithium in the sea outlet concentrated brine, has almost no energy consumption, has no negative impact on the original concentrated brine process, and only increases the screen to intercept the adsorbent in the tail section of the pipeline structure, thereby improving the utilization rate of the discharged concentrated brine.

[0021] 2. The sea outlet pipeline structure provided by the present application has a large-diameter buffer section at the tail section of the pipeline body, the screen is arranged in the buffer section, and the flow rate of the sea outlet concentrated brine flowing through the screen can be reduced by changing the inner diameter.

[0022] 3. The sea outlet pipeline structure provided by the present application is provided with a knob outside the pipeline body, the knob is connected with the screen, the screen can be driven to rotate in the pipeline body by controlling the rotation of the knob, and the screen can be rotated to an interception state to intercept the adsorbent filled into the pipeline body, or the screen can be rotated to an open state to cancel the interception of the adsorbent, so that the adsorbent can flow out of the sea outlet along the pipeline body.

[0023] 4. The lithium extraction method provided by the present application improves the tail section of the sea outlet pipeline, increases the buffer section at the tail section of the pipeline body, arranges the screen in the buffer section, fills the adsorbent into the pipeline body through the feeding port, and the adsorbent absorbs the lithium in the concentrated brine when the sea outlet concentrated brine flows through the screen, so as to achieve the effect of extracting lithium. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0025] Figure 1 The structural schematic diagram of the sea discharge pipeline structure provided for the embodiment 1 of the present application;

[0026] Figure 2 The cross-sectional view of the screen of the sea discharge pipeline structure provided for the embodiment 1 of the present application in the interception state;

[0027] Figure 3 The cross-sectional view of the screen of the sea discharge pipeline structure provided for the embodiment 1 of the present application in the open state.

[0028] Explanation of reference signs:

[0029] 1, pipeline body; 2, feed inlet; 3, knob; 4, buffer section; 5, screen; 6, mesh bag; 7, frame. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0031] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0034] Embodiment 1

[0035] This embodiment provides a specific embodiment of the seawater discharge pipeline structure, as shown in Figure 1 by improving the tail section of the pipeline body 1, adding a screen 5, filling the pipeline body 1 with adsorbent, the screen 5 intercepts the adsorbent, the lithium ions in the seawater discharge brine are adsorbed on the adsorbent through the screen 5 and the adsorbent, and the lithium in the seawater discharge brine is extracted. This structure has almost no energy consumption and has no negative impact on the original brine process. Only the screen 5 is added to the rear-end pipeline structure to intercept the adsorbent, thereby improving the utilization rate of the discharge brine.

[0036] In this embodiment, the tail section of the pipeline body 1 has a buffer section 4 with an inner diameter larger than that of the pipeline body 1, and the screen 5 is placed in the buffer section 4. By changing the inner diameter, the flow rate of the seawater discharge brine flowing through the screen 5 can be reduced to enhance the adsorption effect of the adsorbent on lithium. Under the impact of the water flow, the filled adsorbent is gathered at the screen 5 and naturally forms a full-bed packing state similar to an adsorption column. The adsorbent is spherical, and the water flow can flow relatively uniformly through the naturally distributed spherical adsorbent, with a lower probability of radial flow. The feed inlet 2 is connected to a container containing a certain amount of adsorbent to be adsorbed. The adsorbent can enter the pipeline body 1 through the feed inlet 2.

[0037] In this embodiment, the screen 5 is rotatably installed in the buffer section 4, and the screen 5 has a blocking state of rotating to be parallel to the cross section of the buffer section 4 to prevent the adsorbent from passing through; the screen 5 also has an open state of rotating to be perpendicular to the cross section of the buffer section 4 to allow the adsorbent to pass through. As shown in Figure 2 When the screen 5 is in the blocking state, the adsorbent is added through the feed inlet 2, the adsorbent is gathered on the upstream side of the screen 5, and the lithium in the seawater discharge brine flowing through is adsorbed. After the adsorbent is adsorbed for a period of time, the screen 5 is rotated to the open state, as shown in Figure 3 At this time, the adsorbent flows to the discharge outlet under the action of the water flow and falls into the net pocket 6, and the adsorbent is collected through the net pocket 6. This process does not need to stop the discharge of the brine, and the lithium can be collected and adsorbed during the discharge of the brine. The operation is simple and the collection effect is good.

[0038] Specifically, a knob 3 is provided on the outside of the pipe body 1, and a frame 7 is provided around the circumference of the screen 5. The frame 7 has rounded corners so that it can fit more closely to the inner wall of the buffer section 4. The knob 3 is connected to the screen 5 through the frame 7. By controlling the rotation of the knob 3, the screen 5 can be rotated inside the pipe body 1. During the rotation, the screen 5 can be rotated to the interception state to intercept the adsorbent filled into the pipe body 1, or it can be rotated to the open state to cancel the interception of the adsorbent, so that the adsorbent can flow out of the outlet along the pipe body 1.

[0039] After screen 6 has collected the adsorbent, screen 5 rotates to the interception state. At this time, the adsorbent to be adsorbed into the pipeline from inlet 2 and is intercepted by screen 5, beginning to adsorb lithium from the flowing seawater. The adsorbent saturated with lithium at screen 6 is collected together with screen 6 and enters the desorption process. The adsorbent after lithium desorption returns to the state of being ready to be adsorbed and can be reloaded into inlet 2, waiting for the next cycle of adsorption. After the adsorbent in screen 6 is removed, screen 6 is reset to its initial position, ready for the next round of adsorbent recovery, thus forming a cycle.

[0040] As an alternative implementation, the screen 5 can also be slidably installed in the buffer section 4, and the adsorbent can be collected by pulling out the screen 5.

[0041] Example 2

[0042] The lithium extraction method provided by this invention is implemented using the discharge pipeline structure in Example 1, and further includes the following steps: A screen 5 is installed at the tail end of the pipeline body 1; adsorbent is transported into the pipeline body 1 through the inlet 2; the screen 5 blocks the adsorbent to one side; after the adsorbent absorbs sufficient lithium, the adsorbent is collected and the lithium is extracted. By improving the tail end of the discharge pipeline, a buffer section 4 is added to the tail end of the pipeline body 1. A screen 5 is installed in the buffer section 4, and adsorbent is filled into the pipeline body 1 through the inlet 2. When the concentrated brine flowing through the screen 5 passes through the adsorbent, the adsorbent absorbs the lithium in the concentrated brine, achieving the effect of lithium extraction.

[0043] A net bag 6 is set up at the outlet to receive the adsorbent, and the collection of the adsorbent is completed without stopping the discharge of concentrated brine.

[0044] The state of the screen 5 inside the pipe body 1 is controlled by knob 3.

[0045] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A drainage pipeline structure, characterized in that, include: The pipeline body (1) has a sea outlet at its tail section in the direction of coastal water discharge. A screen (5) is placed at the tail end of the pipe body (1), and the screen (5) is located upstream of the outlet to the sea. The pipe body (1) is provided with a feed inlet (2) located upstream of the screen (5). The feed inlet (2) is connected to the tail section of the pipe body (1). The feed inlet (2) is suitable for adding adsorbent into the pipe body (1). It also includes a net bag (6), which is detachably connected to the outlet of the pipe body (1); The tail section of the pipe body (1) has a buffer section (4) with an inner diameter larger than that of the pipe body (1); The screen (5) is placed inside the buffer section (4); The screen (5) is rotatably installed within the buffer section (4); The screen (5) has an interception state in which it rotates to be parallel to the cross-section of the buffer section (4) and prevents the adsorbent from passing through, and the screen (5) also has an open state in which it rotates to be perpendicular to the cross-section of the buffer section (4) and allows the adsorbent to pass through.

2. The discharge pipeline structure according to claim 1, characterized in that, A knob (3) is provided on the outside of the pipe body (1). The knob (3) is connected to the screen (5). The knob (3) is adapted to drive the screen (5) to rotate to switch between the interception state and the open state.

3. The discharge pipeline structure according to claim 2, characterized in that, The screen (5) has a frame (7) around its circumference. The screen (5) is rotatably installed inside the pipe body (1) through the frame (7), and the knob (3) is connected to the frame (7).

4. A lithium extraction method, comprising the discharge pipeline structure as described in any one of claims 1-3, characterized in that, It also includes the following steps: A screen (5) is installed at the tail end of the pipeline body (1). The adsorbent is transported into the pipeline body (1) through the feed inlet (2). The screen (5) blocks the adsorbent to one side. After the adsorbent absorbs enough lithium, the adsorbent is collected and lithium is extracted.

5. The lithium extraction method according to claim 4, characterized in that, It also includes the step of setting up a net (6) at the outlet to receive the adsorbent.

6. The lithium extraction method according to claim 5, characterized in that, The state of the screen (5) inside the pipe body (1) is controlled by the knob (3).

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