Adsorbent transfer-free continuous water treatment device

Abstract

The utility model discloses an adsorbent transfer-free continuous water treatment device which comprises a rack, and at least one adsorbent loading structure for loading an adsorbent is movably arranged on the rack. The adsorbent loading structure moves on a closed path for water treatment with the adsorbent therein and returns to the starting point together with the adsorbent after water treatment is completed. According to the utility model, the adsorbent is fixedly loaded in the adsorbent loading mechanism, and the adsorbent loading mechanism runs on the closed route, so that the adsorbent loading mechanism not only can drive the adsorbent to move for water treatment, but also can convey the adsorbent back to the starting point of the closed route after a set of water treatment process is completed by the adsorbent; the system can be immediately put into the next round of water treatment flow; in the process, the adsorbent is always kept in the adsorbent loading mechanism and does not need to be transferred, so that zero loss of the adsorbent can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, and specifically relates to a continuous water treatment device that eliminates the need for adsorbent transfer. Background Technology

[0002] Using a vacuum belt filter (hereinafter referred to as a belt filter) in combination with powdered adsorbent for brine treatment is currently an effective method. Furthermore, since powdered adsorbent is a key raw material for brine treatment and has high investment costs, it is usually reused.

[0003] For example, Chinese invention patent CN111825152B discloses a belt filter and its application in lithium extraction from brine by adsorption. The belt filter includes a frame with a reciprocating filter cloth on the frame. Along the forward direction of the filter cloth, a solid-liquid separation zone, a brine washing zone, a desorption zone, and a brine washing return water zone are formed sequentially on the filter cloth. Above the solid-liquid separation zone, there is a mixing adsorption mechanism for conveying the adsorbent-brine mixture to the solid-liquid separation zone. Above the brine washing zone, there is a brine washing liquid conveying mechanism for conveying the brine washing liquid to the brine washing zone. Above the desorption zone, there is a desorption liquid conveying mechanism for conveying the desorption liquid to the desorption zone. Below the desorption zone, there is a lithium eluent collection port. Above the brine washing return water zone, there is a brine washing liquid reflux mechanism, the inlet of which is connected to the brine washing liquid collection port. Downstream of the brine washing return water zone, there is an adsorbent recovery mechanism connected to the mixing adsorption mechanism.

[0004] Since the filter cloth on the belt filter moves in a straight line, the powdered adsorbent needs to be collected at the tail end of the belt filter and transported back to the head end. Inevitably, some powdered adsorbent will be lost during this recycling process, increasing water treatment costs. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous water treatment device and method that eliminates the need for adsorbent transfer. When using this device for water treatment, there is no need to transfer the adsorbent, thus achieving zero loss of the adsorbent.

[0006] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:

[0007] A continuous water treatment device for which adsorbents do not need to be transported includes a frame on which at least one adsorbent loading structure for loading adsorbents is movably disposed. The adsorbent loading structure moves along a closed path to use the adsorbent therein for water treatment and returns to the starting point together with the adsorbent after the water treatment is completed.

[0008] This invention fixes the adsorbent in an adsorbent loading mechanism and makes the adsorbent loading mechanism run on a closed loop. In this way, the adsorbent loading mechanism can not only move the adsorbent for water treatment, but also transport the adsorbent back to the starting point of the closed loop after completing a water treatment process, and can immediately put it into the next water treatment process. During this process, the adsorbent is always kept in the adsorbent loading mechanism without the need for transfer, and zero loss of adsorbent can be achieved.

[0009] In the aforementioned continuous water treatment device, one or more adsorbent loading structures run along the closed path. The length of a single adsorbent loading structure or the total length of all adsorbent loading structures is less than or equal to the length of the closed path. That is, the adsorbent loading structure may or may not occupy the entire closed path, and there may be gaps between adjacent adsorbent loading structures. It can be seen that when the adsorbent loading structure occupies the entire closed path, the entire water treatment process becomes more compact, smooth, and effective.

[0010] In the aforementioned continuous water treatment device, the closed circuit includes at least an adsorption zone, a washing zone, and a desorption zone arranged sequentially and connected end-to-end, and the frame is equipped with:

[0011] An adsorption spraying assembly and an adsorption collection assembly are provided corresponding to the adsorption zone. The adsorption spraying assembly is used to spray the liquid to be treated onto the adsorbent, and the adsorption collection assembly is used to collect the effluent from the adsorption zone.

[0012] A washing spray assembly and a washing collection assembly corresponding to the washing area, wherein the washing spray assembly is used to spray washing liquid onto the adsorbent, and the washing collection assembly is used to collect the effluent from the washing area;

[0013] A desorption spray assembly and a desorption collection assembly are provided corresponding to the desorption zone. The desorption spray assembly is used to spray desorption liquid onto the adsorbent, and the desorption collection assembly is used to collect the effluent from the desorption zone.

[0014] A negative pressure assembly used to facilitate the flow of liquid to be treated, washing liquid, or desorbed liquid through an adsorbent for collection.

[0015] Each spraying component and each collecting component is located on the upper and lower sides of the adsorbent loading mechanism, respectively. Water is sprayed in from the top and collected from the bottom. Under the impetus of the negative pressure component, the water from each zone can be collected quickly and separately, and there will be no mixing of liquids.

[0016] In this invention, the liquid to be treated is also contacted by the adsorbent through spraying, rather than being mixed with the adsorbent in a mixing tank. This adsorption method also facilitates zero transfer of the adsorbent.

[0017] Preferably, in the above-mentioned continuous water treatment device, the adsorption zone (100) includes at least a secondary adsorption zone (101) and a primary adsorption zone (102) arranged sequentially along a closed path, the adsorption spray assembly includes at least a secondary adsorption spray pipe (31a) and a primary adsorption spray pipe (31b) arranged sequentially along a closed path, and the adsorption collection assembly includes at least a secondary adsorption collection pipe (41a) and a primary adsorption collection pipe (41b) arranged sequentially along a closed path.

[0018] The primary adsorption collection pipe (41b) is connected to the secondary adsorption spray pipe (31a) via a countercurrent pipeline.

[0019] During adsorption, the first-stage adsorption spray pipe sprays the liquid to be treated into the first-stage adsorption zone, and the first-stage adsorption collection pipe collects the effluent from the first-stage adsorption zone and sends it countercurrently to the second-stage adsorption spray pipe. Then, the second-stage adsorption spray pipe sprays the effluent from the first-stage adsorption zone into the second-stage adsorption zone, and the second-stage adsorption collection pipe collects the effluent from the second-stage adsorption zone.

[0020] When two or more adsorption zones are set up, the adsorption is also carried out in a stepwise countercurrent manner.

[0021] In this invention, the adsorbent is pre-filled in the adsorbent loading mechanism. During one adsorption process, the contact time between the adsorbent and the liquid to be treated is short, and the adsorption of the liquid to be treated is not sufficient. Therefore, this invention improves the adsorption efficiency by setting up multiple adsorption zones to adsorb the liquid to be treated in a countercurrent manner multiple times.

[0022] Similarly, when two or more washing or desorption zones are set up, this utility model still adopts a gradual countercurrent washing or desorption method.

[0023] Preferably, in the aforementioned continuous water treatment device, a drying zone is provided between any two of the adsorption zone, washing zone, and desorption zone. The drying zone does not have a spray assembly or has one that is not operational. No new water enters the drying zone; only water exits. This is to prevent mixing of liquids between functional zones.

[0024] Preferably, in the above-mentioned continuous water treatment device, a first drying zone is provided at least between the adsorption zone and the washing zone, and a third drying zone is provided at least between the desorption zone and the adsorption zone.

[0025] When the purpose is to remove impurities, the effluent from the adsorption zone is the main target collection liquid, so it needs to be fully extracted using the first drying zone; while the desorption zone is used to fully wash away the residue on the adsorbent, so the effluent from the desorption zone must also be fully extracted to avoid affecting the efficiency of the next round of water treatment.

[0026] In the aforementioned continuous water treatment device, the frame is provided with a track for guiding the operation of the adsorbent loading mechanism;

[0027] Alternatively, a turntable is rotatably mounted on the frame, and the adsorbent loading mechanism is fixed on the turntable.

[0028] In this invention, a track can be directly installed on the frame, so that the adsorbent loading mechanism can move autonomously along a predetermined closed path under the guidance of the track; in addition, a turntable can be installed on the frame, and the rotation of the turntable can be used to achieve the purpose of the adsorbent loading mechanism moving along a certain closed path.

[0029] In the aforementioned continuous water treatment device, the adsorbent loading mechanism includes at least an inner guardrail and an outer guardrail, with an adsorbent tank for filling the adsorbent formed between the inner guardrail and the outer guardrail.

[0030] The inner and outer guardrails are connected end to end and are fixedly connected to the turntable or integrally formed and concentrically or eccentrically arranged. The adsorbent tank is in a regular or irregular ring shape.

[0031] In this invention, the adsorbent loading mechanism can independently form an adsorbent trough, in which case the adsorbent loading mechanism includes not only the inner guardrail and the outer guardrail, but also a bottom support; or it can be combined with the turntable to form an adsorbent trough, in which case the turntable acts as the bottom support.

[0032] This invention does not have any special requirements for the shape of the outer and inner edge contours of the adsorbent tank, as long as the overall shape is a ring connected end to end; wherein, it can be a single adsorbent tank arranged in a ring around the turntable, or it can be multiple adsorbent tanks arranged around the turntable enclosing a ring.

[0033] Preferably, in the above-mentioned continuous water treatment device, the adsorbent tank is provided with a filter cloth, and the filling depth of the adsorbent on the filter cloth is 5-50cm.

[0034] Preferably, in the above-mentioned continuous water treatment device, the rotating disk has a plurality of filter holes corresponding to the position of the adsorbent tank.

[0035] The frame is fixedly provided with a liquid collection tray located below the turntable, and the liquid collection tray is sealed to the turntable;

[0036] The closed circuit includes several functional areas connected end to end. The frame is equipped with a liquid collection tank that corresponds to each functional area. The liquid collection tank is connected to the liquid collection tray through an independent liquid collection pipe.

[0037] The filling depth of the adsorbent can be set according to the specific conditions of the liquid to be treated. This utility model has no special requirements in this regard. Laying filter cloth at the bottom of the adsorbent tank can prevent the adsorbent from being lost.

[0038] Although the collection pipes and collection tanks correspond one-to-one with each functional area (i.e., the adsorption area, washing area, desorption area, and drying area mentioned above), since the turntable is rotating during the water treatment process, it is sufficient to set up a collection tray below the turntable to collect water from each position of the turntable, thus eliminating the need to consider the impact of the turntable's rotation on the collection of water from each area.

[0039] Obviously, in this situation, when a certain functional area is discharging water, the corresponding collection pipe and collection tank will start collecting liquid, while the other collection pipes and collection tanks will not collect liquid.

[0040] Compared with the prior art, the technical effects of this utility model are reflected in:

[0041] (1) The present invention fixes the adsorbent in the adsorbent loading mechanism and makes the adsorbent loading mechanism run on a closed path. In this way, the adsorbent loading mechanism can not only move the adsorbent to carry water treatment, but also transport the adsorbent back to the starting point of the closed path after the adsorbent completes a water treatment process and can be immediately put into the next round of water treatment process. During this process, the adsorbent is always kept in the adsorbent loading mechanism, without the need for transfer. The adsorbent is regenerated in situ, which can achieve zero loss of adsorbent.

[0042] (2) In this utility model, the adsorbent loading mechanism may or may not occupy the entire closed route, and there may be no gap or gap between adjacent adsorbent loading mechanisms; it can be seen that when the adsorbent loading mechanism occupies the entire closed route, the entire water treatment process can be more compact, smooth and effective.

[0043] (3) In this invention, the liquid to be treated is contacted by the adsorbent through spraying, rather than being mixed with the adsorbent in a mixing tank. This adsorption method also provides convenience for zero transfer of the adsorbent. At the same time, in order to improve the adsorption efficiency of the adsorbent on the liquid to be treated, this invention sets up multiple adsorption zones to adsorb the liquid to be treated in countercurrent multiple times.

[0044] (4) In this utility model, the liquid collection pipe and the liquid collection tank correspond one-to-one with each functional area (i.e., the above-mentioned adsorption area, washing area, desorption area, and drying area, etc.). However, since the turntable is in a rotating state during the water treatment process, if the water outlet is also divided into zones, it is easy for mixed liquids to occur (especially when the adsorbent loading mechanism occupies the entire closed path). Therefore, this utility model sets up a liquid collection tray below the turntable that can hold liquids from each position of the turntable, so as to avoid the influence of the turntable rotation on the collection of water from each zone. At the same time, a drying area is set between any two of the adsorption area, washing area and desorption area. No new water enters the drying area, only water can exit, so as to avoid mixed liquids between functional areas. Attached Figure Description

[0045] Figure 1This is a schematic diagram of the structure of a continuous water treatment device for which the adsorbent does not need to be transported according to this utility model;

[0046] Figure 2 This is a schematic diagram of the structure of the continuous water treatment device of the present invention, which requires no transfer of the adsorbent, from another perspective.

[0047] Figure 3 This is a schematic diagram of the top structure of a continuous water treatment device for which the adsorbent does not need to be transported, according to the present invention.

[0048] Figure 4 This is a schematic diagram of the first structure of the adsorbent loading mechanism in a continuous water treatment device that eliminates the need for adsorbent transfer, according to the present invention.

[0049] Figure 5 This is a schematic diagram of a second structure of the adsorbent loading mechanism in a continuous water treatment device that eliminates the need for adsorbent transfer, according to the present invention.

[0050] Figure 6 This is a schematic diagram of the third structure of the adsorbent loading mechanism in a continuous water treatment device that eliminates the need for adsorbent transfer, according to the present invention.

[0051] Figure 7 This is a schematic diagram of the fourth structure of the adsorbent loading mechanism in a continuous water treatment device that eliminates the need for adsorbent transfer, according to this utility model.

[0052] Figure 8 This is a schematic diagram of the fifth structure of the adsorbent loading mechanism in a continuous water treatment device for which the adsorbent does not require transfer, according to this utility model.

[0053] Figure 9 This is a diagram illustrating the operational state of a continuous water treatment device for which the adsorbent does not require transfer, according to this utility model.

[0054] Figure 10 This is another usage state diagram of the continuous water treatment device of the present invention that eliminates the need for adsorbent transfer. Detailed Implementation

[0055] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] Example 1

[0057] like Figure 1 and Figure 2As shown in the figure, this embodiment of a continuous water treatment device for adsorbent without transfer includes a frame 1, on which an adsorbent loading mechanism 2 is provided, the adsorbent loading mechanism 2 being filled with an adsorbent for water treatment; a spraying mechanism 3 is provided above the adsorbent loading mechanism 2, the spraying mechanism 3 being used to spray the liquid required for the water treatment process onto the adsorbent loading mechanism 2; and a liquid collection mechanism 4 is provided below the adsorbent loading mechanism 2, the liquid collection mechanism 4 being used to collect the effluent from the adsorbent loading mechanism 2.

[0058] Specifically, in this embodiment, a turntable 21 is rotatably mounted on the frame 1, and the center of the turntable 21 is connected to the output shaft of the motor 22 to obtain power from the motor 22; the aforementioned adsorbent loading mechanism 2 is fixedly mounted or integrally formed on the turntable 21.

[0059] from Figure 1 and Figure 3 As can be seen, the adsorbent loading mechanism 2 is located off the center of the turntable 21. Therefore, when the turntable 21 rotates, the adsorbent loading mechanism 2 can run along a closed path. During operation, it can not only perform water treatment, but also return to the starting point after completing one round of water treatment and can immediately start the next round of water treatment process.

[0060] In this embodiment, the number of adsorbent loading mechanisms 2 running on the closed path can be one (e.g., Figure 3 , Figure 5 ) or multiple (such as Figure 6 When only one adsorbent loading mechanism 2 is provided, the length of the adsorbent loading mechanism 2 can be less than (e.g., Figure 5 ) or equal to (e.g.) Figure 1 The length of the closed path; when multiple adsorbent loading mechanisms 2 are set, there can be gaps between adjacent adsorbent loading mechanisms 2 on the closed path (e.g., Figure 6 It can also be seamless (the effect is the same as) Figure 3 quite).

[0061] Obviously, making the length or total length of the adsorbent loading mechanism 2 roughly equal to the length of the closed path will make the entire water treatment process smoother and avoid interruptions between the adsorbent loading mechanisms 2. Therefore, the following description of this embodiment focuses on the case where an adsorbent loading mechanism 2 with a length roughly equal to the closed path is provided. The other cases are the same as the above cases except for the number of adsorbent loading mechanisms 2.

[0062] like Figure 1As shown, the adsorbent loading mechanism 2 of this embodiment includes an inner guardrail 23 and an outer guardrail 24, which are connected end to end, thus forming an adsorbent tank 25 for filling the adsorbent. Although only one adsorbent tank 25 is formed in this adsorbent loading mechanism, partitions can still be placed inside as needed to divide the adsorbent according to the water treatment process.

[0063] In this embodiment, the inner guardrail 23 and the outer guardrail 24 are independently arranged eccentrically or concentrically with respect to the center of the turntable 21. The adsorbent tank 25, apart from needing to be annular, can have any specific design for its inner and outer edges. Figure 3 The circular pattern shown is one of the more regular and easier-to-set styles.

[0064] The inner guardrail 23 and outer guardrail 24 can be directly installed on the turntable 21, or an additional base can be installed between them. In either case, to facilitate the outflow of effluent from the adsorbent tank 25, filter holes need to be made on the turntable 21 or on the turntable 21 and base; if necessary, a filter cloth can also be placed inside the adsorbent tank 25 to reduce adsorbent loss due to filtration. The filling depth of the adsorbent in the adsorbent tank 25 can be selected between 5-50 cm, depending on the type of liquid to be treated.

[0065] To implement different water treatment steps at different locations along a closed loop, such as Figure 1 , Figure 2 , Figure 3 and Figure 9 , Figure 10 As shown, in this embodiment, the spraying mechanism 3 includes an adsorption spraying component, a washing spraying component and a desorption spraying component arranged sequentially along a closed path, and the corresponding areas on the closed path are the adsorption zone 100, the washing zone 300 and the desorption zone 400 in sequence.

[0066] The adsorption spray assembly is used to spray the liquid to be treated onto the adsorbent running to the adsorption zone 100 so that the adsorbent adsorbs the liquid to be treated; the washing spray assembly is used to spray washing liquid onto the adsorbent running to the washing zone 300 so as to wash away the impurities adsorbed in the adsorbent; and the desorption spray assembly is used to spray desorption liquid onto the adsorbent running to the desorption zone 400 so as to wash off the target ions adsorbed in the adsorbent.

[0067] Accordingly, the liquid collection mechanism 4 includes an adsorption collection component, a washing collection component, and a desorption collection component arranged sequentially along a closed path. The adsorption collection component is used to collect the effluent from the adsorption zone 100, the washing collection component is used to collect the effluent from the washing zone 300, and the desorption collection component is used to collect the effluent from the desorption zone 400. The liquid collection mechanism 4 also includes a negative pressure component, which is used to promote the effluent.

[0068] In fact, the structures of each spray assembly are the same, including one or more spray pipes 31 mounted above the adsorbent loading mechanism 2. The only difference is the liquid transported in them. The structures of each collection assembly are also the same, including one or more collection pipes 41 and one or more collection tanks 42. The only difference is the liquid collected in them. Note that when water is discharged from a certain functional area, the corresponding collection pipe 41 and collection tank 42 will start collecting liquid. The other collection pipes 41 and collection tanks 42 will not collect liquid.

[0069] In this embodiment, the liquid collection pipe 41 of each collection component is connected to the same liquid collection plate 43. The liquid collection plate 43 is located below the turntable 21, and its center has a through hole so that the output shaft of the motor 22 can pass through and connect to the turntable 21. The inner and outer edges of the liquid collection plate 43 are sealed and connected to the turntable 21 and rotate relative to it.

[0070] Therefore, if necessary, the spray pipe 31 used to transport the liquid to be treated in some scenarios may be used to spray the washing liquid or desorption liquid in other scenarios, and the spray pipe 31 used to transport the washing liquid in some scenarios may be used to spray the liquid to be treated or desorption liquid in other scenarios, etc.; that is, the functional areas can be converted to each other; the same applies to the liquid collection pipe 41.

[0071] In this embodiment, the same type of functional area (i.e., adsorption area 100, washing area 300, desorption area 400) can be set up only once or multiple times consecutively, and each functional area is equipped with a corresponding spraying component and a collection component.

[0072] Furthermore, drying zones can be set up between adjacent functional areas of different types as needed. For example, a first drying zone 200 can be set up between the adsorption zone 100 and the washing zone 300, a second drying zone can be set up between the washing zone 300 and the desorption zone 400, and a third drying zone 500 can be set up between the desorption zone 400 and the adsorption zone 100. Simultaneous setting is not required; the zone can be set up at any location as needed, or it can be left unset. One or more zones can be set up at the same location. Spraying components may not be set up in the drying zone, or spraying components may be set up but not working, but collection components must be set up.

[0073] When the adsorbent loading mechanism 2 reaches the desiccation zone, only the negative pressure component and the corresponding collection component work to desiccate the residual liquid in the adsorbent loading mechanism 2, thus avoiding cross-contamination between different functional areas. Obviously, this desiccation zone can be set up independently, or it can be converted from some functional areas (i.e., it was originally a functional area, but is used as a desiccation zone in certain scenarios).

[0074] When multiple functional zones of the same type are set, this embodiment can adopt countercurrent adsorption, countercurrent washing, and countercurrent desorption. Taking adsorption zone 100 as an example, adsorption zone 100 includes at least a secondary adsorption zone 101 and a primary adsorption zone 102 arranged sequentially along a closed path. Correspondingly, the adsorption spray assembly includes at least a secondary adsorption spray pipe 31a and a primary adsorption spray pipe 31b arranged sequentially along a closed path. The adsorption collection assembly includes at least a secondary adsorption collection pipe 41a, a secondary adsorption collection tank 42a, a primary adsorption collection pipe 41b, and a primary adsorption collection tank 42b arranged sequentially along a closed path.

[0075] During adsorption, the primary adsorption spray pipe 31b sprays the liquid to be treated into the primary adsorption zone 102, the primary adsorption collection pipe 41b collects the effluent from the primary adsorption zone 102, stores it in the primary adsorption collection tank 42b, and transfers it to the transfer box 44, which then sends it countercurrently to the secondary adsorption spray pipe 31a. The secondary adsorption spray pipe 31a then sprays the effluent from the primary adsorption zone 102 into the secondary adsorption zone 101, and the secondary adsorption collection pipe 41a and the secondary adsorption collection tank 42a collect the effluent from the secondary adsorption zone 101.

[0076] When two or more adsorption zones 100 are set, the adsorption is also carried out in a stepwise countercurrent manner.

[0077] This is because the adsorbent is pre-filled in the adsorbent loading mechanism 2. During one adsorption process, the contact time between the adsorbent and the liquid to be treated is short, and the adsorption of the liquid to be treated (especially the target enriched ions) is not sufficient. Therefore, this invention improves the adsorption efficiency by setting up multiple adsorption zones 100 to adsorb the liquid to be treated in a countercurrent manner multiple times.

[0078] Similarly, when two or more washing zones 300 or desorption zones 400 are set up, a gradual countercurrent washing or desorption method can also be adopted.

[0079] However, a co-current flow method can also be used when needed, depending on the type of liquid to be treated and the purpose of water treatment; this is simply a difference in how the device is used.

[0080] Example 2

[0081] like Figure 7 or Figure 8 As shown, this embodiment provides a continuous water treatment device for adsorbent without transfer. Its structure is basically the same as that of Embodiment 1, except that: a track 11 is provided on the frame 1 to guide the operation of the adsorbent loading mechanism 2; thus, the adsorbent loading mechanism 2 can move along a predetermined closed path under the guidance of the track 11.

[0082] Example 3

[0083] This embodiment presents a continuous water treatment method without adsorbent transfer. The method is implemented using the continuous water treatment apparatus of Example 1. The liquid to be treated is a lithium concentrate, and the purpose of treatment is boron removal. The water treatment method includes the following steps:

[0084] S1: The adsorbent loading structure filled with adsorbent is moved to the adsorption zone 100, the adsorption spraying assembly sprays the liquid to be treated onto the adsorbent, and the adsorption collection assembly collects the effluent from the adsorption zone 100.

[0085] Specifically, in this embodiment, the adsorbent used is SL700B resin, and the filling depth in the adsorbent tank 25 is 20cm; the liquid to be treated contains 6g / L Li + 500mg / L Ca 2+ 500 mg / L Mg 2+ A mixed solution of 50 mg / L boron and lithium chloride was concentrated and purified by membrane segment to obtain a lithium concentrate.

[0086] like Figure 9 As shown, in this embodiment, the closed path is divided into ten zones from A to J. Among them, zone A and zone B are adsorption zones 100, zone C is the first drying zone 200, zone DF is the washing zone 300, zone GI is the desorption zone 400, and zone J is the third drying zone 500.

[0087] That is: the primary adsorption spray pipe 31b sprays the liquid to be treated into zone B. The effluent from zone B is collected by the collection tray 43, the primary adsorption collection pipe 41b and the primary adsorption collection tank 42b, and then transported to the transfer box 44, and then transported countercurrently to the secondary adsorption spray pipe 31a; the secondary adsorption spray pipe 31a sprays the effluent from zone B into zone A for re-adsorption, and the effluent from zone A is collected by the collection tray 43, the secondary adsorption collection pipe 41a and the secondary adsorption collection tank 42a.

[0088] The adsorption spray pipe 31 above zone C does not spray liquid; only the negative pressure component works to drain and exhaust the water from the adsorption zone 100 in the adsorbent loading mechanism 2 and the liquid collection tray 43.

[0089] S2: The adsorbent loading mechanism 2 continues to run to the washing zone 300, the washing spray assembly sprays the washing liquid onto the adsorbent, and the washing collection assembly collects the effluent from the washing zone 300.

[0090] Specifically, fresh water is used as the washing liquid. Water is distributed from zone F, the water from zone F flows back to zone E, the water from zone E flows back to zone D, and the water from zone D is collected.

[0091] S3: Continue to run the adsorbent loading mechanism 2 to the desorption zone 400, so that the desorption spraying assembly sprays the desorption liquid onto the adsorbent and the desorption collection assembly collects the effluent from the desorption zone 400.

[0092] Specifically, a 4% hydrochloric acid solution was used as the desorption liquid. Water was distributed from zone I, the water from zone I flowed back to zone H, the water from zone H flowed back to zone G, and the water from zone G was collected.

[0093] In zone J, no water is distributed; only the negative pressure component works to ensure that the water effluent from the desorption zone 400 in the adsorbent loading mechanism 2 and the collection tray 43 is pumped out and drained.

[0094] S4: Return the adsorbent loading mechanism 2 to the adsorption zone 100 along the closed path, and repeat steps S1-S3.

[0095] The concentrations (mg / L) of each ion in the solution to be treated, the effluent from zone A, the effluent from zone D, and the effluent from zone G are shown in Table 1.

[0096] Table 1

[0097]

[0098] As shown in Table 1, the boron concentration in the effluent of Zone A (adsorption zone) decreased significantly from the initial 50.50 mg / L to 4.55 mg / L, with the system achieving a boron adsorption rate of 91%. Meanwhile, the lithium concentration only decreased from 6058 mg / L to 6010 mg / L (lithium loss rate 0.8%), indicating that the SL700B resin has a high selective adsorption capacity for boron. The washing solution is mainly used to wash away the liquid adhering to the surface of the adsorbent, while the desorption solution is used to wash away the ions absorbed by the adsorbent to regenerate it (the same applies below).

[0099] The effluent from zones A, D, and G shows that the boron desorption rate of the system is approximately 90.27%. After a complete water treatment process, the adsorbent is essentially fully regenerated, indicating that the selected desorption solution can effectively desorb the ions adsorbed by the resin; the adsorbent can be immediately added to the next round of water treatment. On the other hand, the Li / B ion concentration ratio in the effluent gradually decreases, with the highest Li / B ion concentration ratio in zone A effluent. This indicates that the water treatment process of this invention has a significant effect on removing boron and impurities from lithium concentrate, achieving efficient boron separation and tiered purification of impurity ions while ensuring lithium recovery (total loss <0.9%).

[0100] Adsorption rate = [1 - Boron concentration in effluent from zone A * Volume of effluent from zone A / (Boron concentration in the solution to be treated * Volume of the solution to be treated)] × 100%;

[0101] Desorption rate = [(boron concentration in D zone effluent * volume of D zone effluent + boron concentration in G zone effluent * volume of G zone effluent) / (boron concentration in the liquid to be treated * volume of the liquid to be treated)] × 100%.

[0102] Example 4

[0103] This embodiment presents a continuous water treatment method without adsorbent transfer. The method is implemented using the continuous water treatment apparatus of Example 1. The liquid to be treated is a lithium concentrate, and the purpose of treatment is to remove calcium and magnesium. The water treatment method includes the following steps:

[0104] S1: The adsorbent loading structure filled with adsorbent is moved to the adsorption zone 100, the adsorption spraying assembly sprays the liquid to be treated onto the adsorbent, and the adsorption collection assembly collects the effluent from the adsorption zone 100.

[0105] Specifically, the adsorbent used in this embodiment is D403 resin product, and the filling depth in the adsorbent tank 25 is 20cm; the liquid to be treated is lithium concentrate after membrane concentration and impurity removal on a lithium extraction production line of a salt lake in Tibet.

[0106] like Figure 10 As shown, in this embodiment, the closed path is divided into ten zones from A to J. Among them, zone A and zone B are adsorption zones 100, zone C is the first drying zone 200, zone DF is the washing zone 300, zone GH is the desorption zone 400, and zone IJ is the third drying zone 500.

[0107] That is: the primary adsorption spray pipe 31b sprays the liquid to be treated into zone B. The effluent from zone B is collected by the collection tray 43, the primary adsorption collection pipe 41b and the primary adsorption collection tank 42b, and then discharged into the transfer box. It is then transported countercurrently to the secondary adsorption spray pipe 31a. The secondary adsorption spray pipe 31a sprays the effluent from zone B into zone A for re-adsorption. The effluent from zone A is collected by the collection tray 43, the secondary adsorption collection pipe 41a and the secondary adsorption collection tank 42a.

[0108] The adsorption spray pipe 31 above zone C does not spray liquid; only the negative pressure component works to drain and exhaust the water from the adsorption zone 100 in the adsorbent loading mechanism 2 and the liquid collection tray 43.

[0109] S2: The adsorbent loading mechanism 2 continues to run to the washing zone 300, the washing spray assembly sprays the washing liquid onto the adsorbent, and the washing collection assembly collects the effluent from the washing zone 300.

[0110] Specifically, fresh water is used as the washing liquid. Water is distributed from zone F, the water from zone F flows back to zone E, the water from zone E flows back to zone D, and the water from zone D is collected.

[0111] S3: Continue to run the adsorbent loading mechanism 2 to the desorption zone 400, so that the desorption spraying assembly sprays the desorption liquid onto the adsorbent and the desorption collection assembly collects the effluent from the desorption zone 400.

[0112] Specifically, a 4% hydrochloric acid solution was used as the desorption liquid. Water was distributed from zone H, and the water effluent from zone H flowed counter-currently to zone G, where the water effluent was collected.

[0113] No water is distributed in zones I and J; only the negative pressure components work to ensure that the water effluent from the desorption zone 400 in the adsorbent loading mechanism 2 and the collection tray 43 is pumped out and drained.

[0114] S4: Return the adsorbent loading mechanism 2 to the adsorption zone 100 along the closed path, and repeat steps S1-S3.

[0115] The concentrations (mg / L) of each ion in the solution to be treated, the effluent from zone A, the effluent from zone D, and the effluent from zone G are shown in Table 2.

[0116] Table 2

[0117]

[0118] As shown in Table 2, the concentrations of Ca²⁺ and Mg²⁺ in the solution to be treated were 10.25 mg / L and 5.52 mg / L, respectively. After treatment in zone A (adsorption zone), these concentrations decreased to 0.24 mg / L and 0.15 mg / L, respectively. The adsorption rates of calcium and magnesium by the resin reached 97.7% and 97.3%, respectively, while the loss of Li ions was only 0.002%. This indicates that the D403 resin has a high selective adsorption effect on calcium and magnesium ions, but a poor adsorption capacity for lithium ions. After washing in zone D, the resin was desorbed in zone G. The concentrations of Ca²⁺ and Mg²⁺ in the desorption solution were 2.12 mg / L and 1.05 mg / L, respectively. The desorption rates of the resin reached 95.6% and 96.8%, respectively, indicating that the resin was basically regenerated and the system had basically reached adsorption-desorption equilibrium. This system can effectively reduce the calcium-magnesium / lithium concentration ratio in the lithium concentrate, achieving efficient removal of calcium and magnesium while effectively reducing lithium loss during the impurity removal process.

Claims

1. A continuous water treatment apparatus with adsorbent transport-free, comprising a frame (1), characterized in that, The rack (1) is movably provided with at least one adsorbent loading structure for loading adsorbent, which moves on a closed route to perform water treatment with the adsorbent therein and returns to the starting point with the adsorbent after the water treatment is completed.

2. The continuous water treatment device of claim 1, wherein One or more adsorbent loading structures run on the closed route, and the length of a single adsorbent loading structure or the total length of all adsorbent loading structures is less than or equal to the length of the closed route.

3. The continuous water treatment device of claim 1, wherein The closed route at least includes adsorption zones (100), washing zones (300) and desorption zones (400) arranged in sequence and connected in series, and the rack (1) is provided with: adsorption spray assemblies corresponding to the adsorption zones (100) for spraying the adsorbent with the liquid to be treated, and adsorption collection assemblies for collecting the effluent of the adsorption zones; washing spray assemblies corresponding to the washing zones (300) for spraying the adsorbent with washing liquid, and washing collection assemblies for collecting the effluent of the washing zones; desorption spray assemblies corresponding to the desorption zones (400) for spraying the adsorbent with desorption liquid, and desorption collection assemblies for collecting the effluent of the desorption zones; negative pressure assemblies for promoting the liquid to be treated, the washing liquid or the desorption liquid to flow through the adsorbent and be collected.

4. The continuous water treatment device of claim 3, wherein The adsorption zones (100) at least include secondary adsorption zones (101) and primary adsorption zones (102) arranged in sequence along the closed route, the adsorption spray assemblies at least include secondary adsorption spray pipes (31a) and primary adsorption spray pipes (31b) arranged in sequence along the closed route, and the adsorption collection assemblies at least include secondary adsorption liquid collection pipes (41a) and primary adsorption liquid collection pipes (41b) arranged in sequence along the closed route. The primary adsorption liquid collection pipes (41b) are connected with the secondary adsorption spray pipes (31a) through counterflow pipelines.

5. The continuous water treatment device of claim 3, wherein Any two of the adsorption zones (100), the washing zones (300) and the desorption zones (400) are provided with a dry pumping zone, and no spray assembly is arranged at the dry pumping zone or a spray assembly is arranged but does not work.

6. The continuous water treatment device of claim 5, wherein A first dry pumping zone (200) is arranged at least between the adsorption zones (100) and the washing zones (300), and a third dry pumping zone (500) is arranged at least between the desorption zones (400) and the adsorption zones (100).

7. The continuous water treatment device of claim 1, wherein The rack (1) is provided with a track (11) for guiding the movement of the adsorbent loading mechanism (2); Alternatively, a rotating disc (21) is rotatably mounted on the rack (1), and the adsorbent loading mechanism (2) is fixedly arranged on the rotating disc (21).

8. The continuous water treatment device of claim 7, wherein The adsorbent loading mechanism (2) at least includes an inner guardrail (23) and an outer guardrail (24), and an adsorbent groove (25) for filling the adsorbent is formed between the inner guardrail (23) and the outer guardrail (24). The inner guardrail (23) and the outer guardrail (24) are respectively connected in series, fixedly connected with the rotating disc (21) or integrally formed and concentrically or eccentrically arranged, and the adsorbent groove (25) is regularly or irregularly annular.

9. The continuous water treatment device of claim 8, wherein The adsorbent tank (25) is internally provided with filter cloth, and the filling depth of the adsorbent on the filter cloth is 5-50 cm.

10. The continuous water treatment device of claim 7, wherein The rotating disc (21) is formed with a plurality of filter holes corresponding to the positions of the adsorbent tank (25); The machine frame (1) is fixedly provided with a liquid collecting disc (43) below the rotating disc (21), and the liquid collecting disc (43) is in sealing connection with the rotating disc (21); The closed route comprises a plurality of functional areas connected in a head-to-tail mode, and the machine frame (1) is provided with a liquid collecting tank (42) corresponding to each functional area, and the liquid collecting tank (42) is in communication with the liquid collecting disc (43) through an independent liquid collecting pipe (41).

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