Adsorbent transfer-free continuous water treatment device and method

Abstract

The invention discloses an adsorbent transfer-free continuous water treatment device and method.The device comprises a rack, and at least one adsorbent loading structure used 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 invention, 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 can not only drive the adsorbent to move for water treatment, but also transport 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] The invention belongs to the technical field of water treatment, and in particular relates to an adsorbent-free transport continuous water treatment device and method. Background Art

[0002] The use of a vacuum belt filter (hereinafter referred to as a belt filter) in combination with a powdered adsorbent for brine treatment is currently an effective method. In addition, since the powdered adsorbent is a key raw material for brine treatment and has a high investment cost, the powdered adsorbent is usually reused.

[0003] For example, a Chinese invention patent with publication number CN111825152B discloses a belt filter and its application in lithium extraction from brine by adsorption method, wherein the belt filter comprises a frame, on which a filter cloth for reciprocating rotation is arranged, and along the forward direction of the filter cloth, a solid-liquid separation zone, a salt washing zone, a desorption zone and a salt washing return water zone are sequentially formed on the filter cloth, wherein a mixed adsorption mechanism for conveying an adsorbent-brine mixture to the solid-liquid separation zone is arranged above the solid-liquid separation zone, a salt washing liquid conveying mechanism for conveying a salt washing liquid to the salt washing zone is arranged above the salt washing zone, a desorption liquid conveying mechanism for conveying a desorption liquid to the desorption zone is arranged above the desorption zone, a lithium eluent collecting port is arranged below the desorption zone, a salt eluent reflux mechanism is arranged above the salt washing return water zone, and a liquid inlet end of the salt eluent reflux mechanism is connected to the salt eluent collecting port; an adsorbent recovery mechanism is also arranged downstream of the salt washing return water zone, and the adsorbent recovery mechanism is connected to the mixed adsorption mechanism.

[0004] Since the filter cloth on the belt filter runs 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 of the belt filter. In this recycling process, the powdered adsorbent will inevitably be lost, increasing the cost of water treatment. Summary of the invention

[0005] The object of the present invention is to provide a continuous water treatment device and method without the need for transporting an adsorbent. When the device is used for water treatment, there is no need to transport the adsorbent, and zero loss of the adsorbent can be achieved.

[0006] To achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows: A continuous water treatment device without adsorbent transport comprises a frame on which at least one adsorbent loading structure for loading adsorbent is movably arranged. The adsorbent loading structure moves on a closed route so as to utilize the adsorbent therein for water treatment and returns to the starting point together with the adsorbent after the water treatment is completed.

[0007] The present invention fixes the adsorbent in the adsorbent loading mechanism and enables the adsorbent loading mechanism to operate on a closed route. In this way, the adsorbent loading mechanism can not only move with the adsorbent for water treatment, but also transport the adsorbent back to the starting point of the closed route after the adsorbent completes a set of water treatment processes, and can be immediately put into the next round of water treatment processes; during this process, the adsorbent is always kept in the adsorbent loading mechanism without the need for transportation, and zero loss of the adsorbent can be achieved.

[0008] In the above-mentioned continuous water treatment device, one or more adsorbent loading structures are operated 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. In other words, the adsorbent loading mechanism may or may not occupy the entire closed route, and there may or may not be gaps 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.

[0009] In the above-mentioned continuous water treatment device, the closed route at least includes an adsorption zone, a washing zone and a desorption zone which are arranged in sequence and connected end to end, and the frame is provided with: An adsorption spray assembly and an adsorption collection assembly corresponding to the adsorption zone, wherein the adsorption spray assembly is used to spray the liquid to be treated onto the adsorbent, and the adsorption collection assembly is used to collect water discharged from the adsorption zone; A washing spray assembly and a washing collection assembly corresponding to the washing zone, wherein the washing spray assembly is used to spray washing liquid onto the adsorbent, and the washing collection assembly is used to collect water discharged from the washing zone; A desorption spray assembly and a desorption collection assembly corresponding to the desorption zone, wherein the desorption spray assembly is used to spray desorption liquid onto the adsorbent, and the desorption collection assembly is used to collect water effluent from the desorption zone.

[0010] A negative pressure component used to force the liquid to be treated, the washing liquid or the desorbed liquid to flow through the adsorbent and be collected.

[0011] Each spraying component and each collecting component are respectively located at the upper and lower sides of the adsorbent loading mechanism, with water sprayed in from the upper side and water collected from the lower side. Under the promotion of the negative pressure component, the water from each zone can be quickly collected separately without mixing the liquids.

[0012] In the present invention, the liquid to be treated is also contacted with the adsorbent by spraying, rather than being mixed and contacted with the adsorbent in a mixing tank. This adsorption method also facilitates zero transport of the adsorbent.

[0013] Preferably, in the above-mentioned continuous water treatment device, a draining zone is provided between any two of the adsorption zone, the washing zone and the desorption zone, and no spraying component is provided in the draining zone or the spraying component is provided but does not work. There is no new water inflow in the draining zone, and only water can be discharged, which is also to avoid mixing of liquids between functional zones.

[0014] In the above-mentioned continuous water treatment device, the frame is provided with a track for guiding the operation of the adsorbent loading mechanism; Alternatively, a turntable is rotatably mounted on the frame, and the adsorbent loading mechanism is fixed on the turntable.

[0015] In the present invention, a track can be directly set on the frame, so that the adsorbent loading mechanism can move autonomously along a predetermined closed route 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 moving the adsorbent loading mechanism along a certain closed route.

[0016] In the above-mentioned continuous water treatment device, the adsorbent loading mechanism comprises at least an inner guardrail and an outer guardrail, and an adsorbent tank for filling the adsorbent is formed between the inner guardrail and the outer guardrail; The inner guardrail and the outer guardrail are connected end to end, fixedly connected to the turntable or integrally formed and concentrically or eccentrically arranged, and the adsorbent tank is in a regular or irregular ring shape.

[0017] In the present invention, the adsorbent loading mechanism can independently form an adsorbent tank, in which case the adsorbent loading mechanism includes not only an inner guardrail and an outer guardrail, but also a bottom support; it can also form an adsorbent tank together with a turntable, in which case the turntable acts as a bottom support.

[0018] The present invention has no special requirements on the styles of the outer edge contour and the inner edge contour of the adsorbent tank, as long as the overall shape is a ring connected end to end; wherein, one adsorbent tank can be in the shape of a ring arranged around the turntable, or multiple adsorbent tanks arranged around the turntable can be surrounded by a ring.

[0019] Preferably, in the above-mentioned continuous water treatment device, a filter cloth is provided in the adsorbent tank, the filling depth of the adsorbent on the filter cloth is 5-50 cm, and a plurality of filter holes corresponding to the positions of the adsorbent tanks are formed on the turntable; The frame is fixedly provided with a liquid collecting tray below the turntable, and the liquid collecting tray is sealed and connected to the turntable; The closed route includes a plurality of functional areas connected end to end, and the frame is provided with a liquid collecting tank corresponding to each functional area one by one, and the liquid collecting tank is connected to the liquid collecting tray through an independent liquid collecting pipe.

[0020] The filling depth of the adsorbent can be specifically set according to the specific situation of the liquid to be treated, and the present invention has no special requirements for this. Laying filter cloth at the bottom of the adsorbent tank can prevent the adsorbent from being lost.

[0021] Although the liquid collecting pipe and the liquid collecting tank correspond one to one with each functional area (i.e. the adsorption area, washing area, desorption area, draining area, etc. mentioned above), the turntable is in a rotating state during the water treatment process. Therefore, a liquid collecting tray capable of receiving liquid from various positions of the turntable is provided under the turntable to avoid considering the influence of the rotation of the turntable on the collection of water from each area.

[0022] Obviously, in this case, when a functional area is discharging water, the corresponding liquid collecting pipe and liquid collecting tank will start collecting liquid, and the remaining liquid collecting pipes and liquid collecting tanks will not collect water.

[0023] The present invention also provides a continuous water treatment method without adsorbent transport, which is implemented by using the above-mentioned continuous water treatment device, and comprises the following steps: S1: running the adsorbent loading structure filled with adsorbent to the adsorption area, allowing the adsorption spraying component to spray the liquid to be treated onto the adsorbent, and allowing the adsorption collecting component to collect water discharged from the adsorption area; S2: The adsorbent loading mechanism continues to run to the washing area, the washing spraying assembly sprays the washing liquid onto the adsorbent, and the washing collecting assembly collects the water discharged from the washing area; S3: The adsorbent loading mechanism continues to run to the desorption zone, the desorption spraying assembly sprays the desorption liquid onto the adsorbent, and the desorption collecting assembly collects the water discharged from the desorption zone; S4: Return the adsorbent loading mechanism to the adsorption zone along a closed route, and repeat steps S1-S3.

[0024] Preferably, the water treatment method further comprises at least one of the following steps: After step S1 is completed, the adsorbent loading mechanism is first operated to the first draining area, and the residual liquid to be treated in the adsorbent loading mechanism and the liquid collecting tray is drained by the negative pressure component before step S2 is performed; After step S2 is completed, the adsorbent loading mechanism is first operated to the second draining area, and the residual washing liquid in the adsorbent loading mechanism and the liquid collecting tray is drained by the negative pressure component before step S3 is performed; After step S3 is completed, the adsorbent loading mechanism is first operated to the third draining zone, and the residual desorption liquid in the adsorbent loading mechanism and the liquid collecting tray is drained by the negative pressure component before step S4 is performed.

[0025] When the water outlet from all functional areas enters the liquid collection tray, setting a drain area between adjacent functional areas is helpful to fully avoid mixing of liquids.

[0026] Preferably, in the above-mentioned continuous water treatment method, the adsorption zone at least includes a secondary adsorption zone and a primary adsorption zone sequentially arranged along a closed route, the adsorption spray assembly at least includes a secondary adsorption spray pipe and a primary adsorption spray pipe sequentially arranged along the closed route, and the adsorption collection assembly at least includes a secondary adsorption liquid collecting pipe and a primary adsorption liquid collecting pipe sequentially arranged along the closed route; In the step S1, the first-level adsorption spray pipe sprays the treated liquid to the first-level adsorption area, the first-level adsorption liquid collecting pipe collects the effluent from the first-level adsorption area and sends it to the second-level adsorption spray pipe in countercurrent, and then the second-level adsorption spray pipe sprays the effluent from the first-level adsorption area to the second-level adsorption area, and the second-level adsorption liquid collecting pipe collects the effluent from the second-level adsorption area.

[0027] When more than two adsorption zones are provided, the adsorption is also carried out in a stepwise countercurrent manner.

[0028] In the present 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, the present invention improves the adsorption efficiency by setting up multiple adsorption zones to perform multiple countercurrent adsorptions of the liquid to be treated.

[0029] Likewise, when two or more washing zones or desorption zones are provided, the present invention still adopts a stepwise countercurrent washing or desorption method.

[0030] Compared with the prior art, the technical effects of the present invention are embodied in: (1) The present invention loads the adsorbent in a fixed manner in the adsorbent loading mechanism, and enables the adsorbent loading mechanism to operate on a closed route. In this way, the adsorbent loading mechanism can not only move with the adsorbent for water treatment, but also transport the adsorbent back to the starting point of the closed route after the adsorbent completes a set of water treatment processes, and can be immediately put into the next round of water treatment processes; during this process, the adsorbent is always kept in the adsorbent loading mechanism, and no transportation is required. The adsorbent is regenerated in situ, and zero loss of the adsorbent can be achieved.

[0031] (2) In the present invention, the adsorbent loading mechanism may or may not occupy the entire closed route, and there may or may not be gaps 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.

[0032] (3) In the present invention, the liquid to be treated is contacted with the adsorbent by spraying, rather than being mixed and contacted with the adsorbent in a mixing tank. This adsorption method also facilitates zero transport of the adsorbent. At the same time, in order to improve the adsorption efficiency of the adsorbent on the liquid to be treated, the present invention sets a plurality of adsorption zones to perform multiple countercurrent adsorption of the liquid to be treated.

[0033] (4) In the present invention, the liquid collecting pipe and the liquid collecting tank correspond one-to-one to each functional zone (i.e., the above-mentioned adsorption zone, washing zone, desorption zone, draining zone, etc.). However, since the turntable is in a rotating state during the water treatment process, if the water outlet position is also divided into zones, mixed liquids are likely to occur (especially when the adsorbent loading mechanism occupies the entire closed route). Therefore, the present invention provides a liquid collecting plate capable of receiving liquids from various positions of the turntable under the turntable, thereby eliminating the influence of the rotation of the turntable on the collection of water outlet from each zone. At the same time, a draining zone is provided between any two of the adsorption zone, washing zone and desorption zone. No new water enters the draining zone, and only water can be discharged. In this way, mixed liquids between the functional zones can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a continuous water treatment device without adsorbent transport according to the present invention; Figure 2 It is a structural schematic diagram of an adsorbent-free transport continuous water treatment device of the present invention from another perspective; Figure 3 It is a schematic diagram of the top structure of a continuous water treatment device without adsorbent transport according to the present invention; Figure 4 It is a schematic diagram of the first structure of an adsorbent loading mechanism in an adsorbent-free transport continuous water treatment device of the present invention; Figure 5 It is a second structural schematic diagram of an adsorbent loading mechanism in an adsorbent-free transport continuous water treatment device of the present invention; Figure 6 It is a third structural schematic diagram of an adsorbent loading mechanism in an adsorbent-free transport continuous water treatment device of the present invention; Figure 7 It is a fourth structural schematic diagram of an adsorbent loading mechanism in an adsorbent-free transport continuous water treatment device of the present invention; Figure 8 It is a fifth structural schematic diagram of an adsorbent loading mechanism in an adsorbent-free transport continuous water treatment device of the present invention; Fig. 9 A diagram of a use state of a continuous water treatment device without adsorbent transport according to the present invention; Fig.10 This is another usage state diagram of the adsorbent-free transport continuous water treatment device of the present invention. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Example 1 like Figure 1 and Figure 2As shown, the present embodiment is an adsorbent-free transport continuous water treatment device, comprising a frame 1, on which is provided an adsorbent loading mechanism 2, in which the adsorbent for water treatment is filled; above the adsorbent loading mechanism 2 is provided a spraying mechanism 3, which is used to spray the liquid required in the water treatment process onto the adsorbent loading mechanism 2; below the adsorbent loading mechanism 2 is provided a liquid collecting mechanism 4, which is used to collect the output water of the adsorbent loading mechanism 2.

[0037] 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 above-mentioned adsorbent loading mechanism 2 is fixedly mounted or integrally formed on the turntable 21 .

[0038] from Figure 1 and Figure 3 It can be seen that the adsorbent loading mechanism 2 is located at a position deviated from the center of the turntable 21. Therefore, when the turntable 21 rotates, the adsorbent loading mechanism 2 can run along a closed route. During the operation, it can not only perform water treatment, but also return to the starting point after a round of water treatment procedures are completed, and can immediately start the next round of water treatment process.

[0039] In this embodiment, the number of the adsorbent loading mechanism 2 running on the closed route can be one (eg Figure 3 , Figure 5 ) or more (such as Figure 6 ); When only one adsorbent loading mechanism 2 is provided, the length of the adsorbent loading mechanism 2 may be less than (eg Figure 5 ) or equal to (such as Figure 1 ) The length of the closed route; when multiple adsorbent loading mechanisms 2 are provided, there may be gaps between adjacent adsorbent loading mechanisms 2 on the closed route (eg Figure 6 ) can also be left blank (the effect is the same as Figure 3 quite).

[0040] Obviously, making the length or total length of the adsorbent loading mechanism 2 equal to the length of the closed route will make the entire water treatment process smoother and avoid the pause between the adsorbent loading mechanisms 2. Therefore, the following description of this embodiment focuses on the case of setting an adsorbent loading mechanism 2 with a length equal to the closed route, and the other cases are the same as the above case except for the number of adsorbent loading mechanisms 2.

[0041] like Figure 1As shown, the adsorbent loading mechanism 2 of this embodiment includes an inner guardrail 23 and an outer guardrail 24, and the inner guardrail 23 and the outer guardrail 24 are connected end to end, so that an adsorbent tank 25 for filling the adsorbent is formed between the inner guardrail 23 and the outer guardrail 24. Although only one adsorbent tank 25 is formed in the adsorbent loading mechanism, a partition can be placed inside as needed to partition the adsorbent therein according to the water treatment process.

[0042] In this embodiment, the inner guardrail 23 and the outer guardrail 24 are independently arranged eccentrically or concentrically relative to the center of the turntable 21. The adsorbent tank 25 must be annular, and the specific styles of its inner and outer edges can be arbitrary. Figure 3 The regular circular ring shape shown is a relatively regular and easier to set pattern.

[0043] The inner guardrail 23 and the outer guardrail 24 can be directly set on the turntable 21, or a bottom bracket can be additionally set between the two. In either case, in order to facilitate the outflow of water from the adsorbent tank 25, it is necessary to open a filter hole on the turntable 21 or the turntable 21 and the bottom bracket; if necessary, a filter cloth can be placed in the adsorbent tank 25 to reduce the loss of adsorbent caused by 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.

[0044] To implement different water treatment steps at different locations of the closed route, e.g. Figure 1 , Figure 2 , Figure 3 and Fig. 9 , Fig.10 As shown, in this embodiment, the spray mechanism 3 includes an adsorption spray component, a washing spray component and a desorption spray component which are sequentially arranged along a closed route, and the corresponding areas on the closed route are the adsorption area 100, the washing area 300 and the desorption area 400 respectively.

[0045] Among them, the adsorption spray component 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 component is used to spray the washing liquid onto the adsorbent running to the washing zone 300 so as to wash away the impurities adsorbed in the adsorbent; the desorption spray component is used to spray the desorption liquid onto the adsorbent running to the desorption zone 400 so as to wash away the target ions adsorbed in the adsorbent.

[0046] Correspondingly, the liquid collecting mechanism 4 includes an adsorption collection component, a washing collection component and a desorption collection component which are sequentially arranged along a closed route, wherein the adsorption collection component is used to collect water output from the adsorption zone 100, the washing collection component is used to collect water output from the washing zone 300, and the desorption collection component is used to collect water output from the desorption zone 400; the liquid collecting mechanism 4 also includes a negative pressure component which is used to promote water output.

[0047] In fact, the structures of the various spray components are the same, including one or more spray pipes 31 installed above the adsorbent loading mechanism 2, and the only difference is that the liquids transported therein are different; the structures of the various collecting components are also the same, including one or more liquid collecting pipes 41 and one or more liquid collecting tanks 42, and the only difference is that the liquids collected therein are different; note that when water comes out of a functional area, the corresponding liquid collecting pipes 41 and liquid collecting tanks 42 will start the liquid collection work, and the remaining liquid collecting pipes 41 and liquid collecting tanks 42 will not collect water.

[0048] In this embodiment, the liquid collecting pipes 41 of each collecting component are connected to the same liquid collecting tray 43, which is arranged below the turntable 21. A through hole is provided in the center of the liquid collecting tray 43 so that the output shaft of the motor 22 can pass through and connect with the turntable 21. The inner and outer edges of the liquid collecting tray 43 are sealed and connected to the turntable 21 and rotate relative to each other.

[0049] Therefore, when necessary, part of the spray pipe 31 used to transport the liquid to be treated in some scenarios may be used to spray washing liquid or desorption liquid in other scenarios, and part of 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, and so on; that is, the functional areas can be converted into each other; the same applies to the liquid collecting pipe 41.

[0050] In this embodiment, only one functional zone of the same type (ie, adsorption zone 100, washing zone 300, desorption zone 400) may be provided, or multiple functional zones may be provided in succession, and each functional zone is provided with a corresponding spraying component and a collecting component.

[0051] Furthermore, drain zones may be set between adjacent functional zones of different types as needed, such as setting a first drain zone 200 between the adsorption zone 100 and the washing zone 300, setting a second drain zone between the washing zone 300 and the desorption zone 400, and setting a third drain zone 500 between the desorption zone 400 and the adsorption zone 100. They are not required to be set at the same time, and may be set at any position as needed, or may not be set. One or more may be set at the same position. A spray component may not be set in the drain zone, or may be set but not work, but a collection component must be set.

[0052] When the adsorbent loading mechanism 2 runs to the draining area, only the negative pressure component and the corresponding collection component work to drain the residual liquid in the adsorbent loading mechanism 2 to avoid the problem of liquid cross-talk between different functional areas. Obviously, the draining area can be set independently or converted from part of the functional area (that is, it was originally a functional area, but used as a draining area in some scenarios).

[0053] When multiple functional areas of the same type are set, this embodiment can adopt the methods of countercurrent adsorption, countercurrent washing and countercurrent desorption. Taking the adsorption area 100 as an example, the adsorption area 100 at least includes a secondary adsorption area 101 and a primary adsorption area 102 arranged in sequence along a closed route. Accordingly, the adsorption spray assembly at least includes a secondary adsorption spray pipe 31a and a primary adsorption spray pipe 31b arranged in sequence along the closed route, and the adsorption collection assembly at least includes a secondary adsorption liquid collecting pipe 41a and a primary adsorption liquid collecting pipe 41b arranged in sequence along the closed route.

[0054] During adsorption, the first-level adsorption spray pipe 31b sprays the treated liquid to the first-level adsorption area 102, the first-level adsorption liquid collecting pipe 41b collects the water effluent from the first-level adsorption area 102 and sends it to the second-level adsorption spray pipe 31a in countercurrent, and then the second-level adsorption spray pipe 31a sprays the water effluent from the first-level adsorption area 102 to the second-level adsorption area 101, and the second-level adsorption liquid collecting pipe 41a collects the water effluent from the second-level adsorption area 101.

[0055] When more than two adsorption zones 100 are provided, adsorption is also performed stepwise in countercurrent.

[0056] This arrangement 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 therein) is not sufficient. Therefore, the present invention improves the adsorption efficiency by setting up multiple adsorption areas 100 to perform multiple countercurrent adsorptions of the liquid to be treated.

[0057] Similarly, when two or more washing zones 300 or desorption zones 400 are provided, a stepwise countercurrent washing or desorption method may also be adopted.

[0058] However, when necessary, the downstream method can also be used, depending on the type of liquid to be treated and the purpose of water treatment; this is just a difference in the way the device is used.

[0059] Example 2 like Figure 7 or Figure 8 As shown, this embodiment is an adsorbent-free continuous water treatment device, and its structure is basically the same as that of Embodiment 1, except that: a track 11 for guiding the operation of the adsorbent loading mechanism 2 is provided on the frame 1; thereby, the adsorbent loading mechanism 2 can move along a predetermined closed route under the guidance of the track 11.

[0060] Example 3 This embodiment provides a continuous water treatment method without adsorbent transport, which is implemented using the continuous water treatment device of Example 1. The liquid to be treated is lithium concentrated liquid, and the purpose of treatment is to remove boron. The water treatment method includes the following steps: S1: The adsorbent loading structure filled with adsorbent is moved to the adsorption area 100, the adsorption spraying assembly sprays the liquid to be treated onto the adsorbent, and the adsorption collecting assembly collects the water discharged from the adsorption area 100; Specifically, the adsorbent used in this embodiment is a SL700B resin product, and the filling depth in the adsorbent tank 25 is 20 cm; the liquid to be treated contains 6 g / L Li + , 500mg / L Ca 2+ 、500mg / L Mg 2+ , a lithium chloride mixed solution containing 50 mg / L boron is concentrated and impurities are removed by a membrane section to obtain a lithium concentrate; like Fig. 9 As shown, in this embodiment, the closed route is divided into ten zones from A to J, wherein zone A and zone B are adsorption zones 100, zone C is the first draining zone 200, zone DF is the washing zone 300, zone GI is the desorption zone 400, and zone J is the third draining zone 500; That is, the first-level adsorption spray pipe 31b sprays the treated liquid to the B area, and the water from the B area is collected by the liquid collecting plate 43, the first-level adsorption collecting pipe 41b and the first-level adsorption collecting tank 42b, and then transported to the transfer box 44, and then countercurrently transported to the second-level adsorption spray pipe 31a; the second-level adsorption spray pipe 31a sprays the water from the B area to the A area for re-adsorption, and the water from the A area is collected by the liquid collecting plate 43, the second-level adsorption collecting pipe 41a and the second-level adsorption collecting tank 42a; The adsorption spray pipe 31 above the C zone does not spray liquid, and only the negative pressure assembly works to drain and drain the water out of the adsorption zone 100 in the adsorbent loading mechanism 2 and the liquid collecting tray 43; S2: the adsorbent loading mechanism 2 continues to run to the washing area 300, the washing spraying assembly sprays the washing liquid onto the adsorbent, and the washing collecting assembly collects the water discharged from the washing area 300; Specifically, fresh water is used as the washing liquid, and water is distributed from area F. The water from area F flows back to area E, and the water from area E flows back to area D, and the water from area D is collected; S3: the adsorbent loading mechanism 2 continues to run to the desorption zone 400, the desorption spraying assembly sprays the desorption liquid onto the adsorbent, and the desorption collecting assembly collects the effluent from the desorption zone 400; Specifically, a hydrochloric acid solution with a mass fraction of 4% is used as the desorption liquid, and water is distributed from area I. The water from area I flows back to area H, and the water from area H flows back to area G, and the water from area G is collected; In the J zone, no water is distributed, and only the negative pressure assembly works, so that the water in the desorption zone 400 in the adsorbent loading mechanism 2 and the liquid collecting tray 43 is drained and exhausted; S4: Return the adsorbent loading mechanism 2 to the adsorption area 100 along the closed route, and repeat steps S1 to S3.

[0061] The concentrations of various ions (mg / L) in the treated liquid, the effluent from area A, the effluent from area D, and the effluent from area G are shown in Table 1.

[0062] Table 1 As can be seen from Table 1, the boron concentration in the effluent of zone A (adsorption zone) dropped significantly from the initial 50.50 mg / L to 4.55 mg / L, and the system's adsorption rate for boron reached 91%, while the lithium concentration only dropped 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 liquid is mainly used to wash the treated liquid adhered to the surface of the adsorbent, while the desorption liquid is used to wash off the ions absorbed by the adsorbent to regenerate the adsorbent (the same below).

[0063] It can be seen from the effluents of area A, area D and area G that the boron desorption rate of the system is about 90.27%. After a complete set of water treatment processes, the adsorbent has been basically completely regenerated, indicating that the selected desorption liquid can effectively desorb the ions adsorbed by the resin; the adsorbent can be immediately put into the next round of water treatment process. On the other hand, the Li / B ion concentration ratio in the effluent is gradually decreasing, and the Li / B ion concentration ratio in the effluent of area A is the largest, indicating that the water treatment process of the present invention has a significant effect on the removal of boron and impurities from lithium concentrate, and can achieve efficient separation of boron and step-by-step purification of impurity ions while ensuring the lithium recovery rate (total loss <0.9%).

[0064] Adsorption rate = [1-boron concentration of effluent from area A*volume of effluent from area A / (boron concentration of liquid to be treated*volume of liquid to be treated)] × 100%; Desorption rate = [(boron concentration of effluent from area D * effluent volume from area D + boron concentration of effluent from area G * effluent volume from area G) / (boron concentration of the liquid to be treated * volume of the liquid to be treated)] × 100%.

[0065] Example 4 This embodiment provides a continuous water treatment method without adsorbent transport, which is implemented using the continuous water treatment device of Example 1. The liquid to be treated is lithium concentrated liquid, and the purpose of treatment is to remove calcium and magnesium. The water treatment method includes the following steps: S1: The adsorbent loading structure filled with adsorbent is moved to the adsorption area 100, the adsorption spraying assembly sprays the liquid to be treated onto the adsorbent, and the adsorption collecting assembly collects the water discharged from the adsorption area 100; Specifically, the adsorbent used in this embodiment is a D403 resin product, and the filling depth in the adsorbent tank 25 is 20 cm; the liquid to be treated is a lithium concentrate after concentration and impurity removal by the membrane section on a lithium extraction production line of brine from a salt lake in Tibet; like Fig.10As shown, in this embodiment, the closed route is divided into ten zones from A to J, wherein zone A and zone B are adsorption zones 100, zone C is the first draining zone 200, zone DF is the washing zone 300, zone GH is the desorption zone 400, and zone IJ is the third draining zone 500; That is, the first-level adsorption spray pipe 31b sprays the treated liquid to the B area, and the water from the B area is collected by the liquid collecting plate 43, the first-level adsorption collecting pipe 41b and the first-level adsorption collecting tank 42b, and then discharged into the transfer box, and then countercurrently transported to the second-level adsorption spray pipe 31a; the second-level adsorption spray pipe 31a sprays the water from the B area to the A area for re-adsorption, and the water from the A area is collected by the liquid collecting plate 43, the second-level adsorption collecting pipe 41a and the second-level adsorption collecting tank 42a; The adsorption spray pipe 31 above the C zone does not spray liquid, and only the negative pressure assembly works to drain and drain the water out of the adsorption zone 100 in the adsorbent loading mechanism 2 and the liquid collecting tray 43; S2: the adsorbent loading mechanism 2 continues to run to the washing area 300, the washing spraying assembly sprays the washing liquid onto the adsorbent, and the washing collecting assembly collects the water discharged from the washing area 300; Specifically, fresh water is used as the washing liquid, and water is distributed from area F. The water from area F flows back to area E, and the water from area E flows back to area D, and the water from area D is collected; S3: the adsorbent loading mechanism 2 continues to run to the desorption zone 400, the desorption spraying assembly sprays the desorption liquid onto the adsorbent, and the desorption collecting assembly collects the effluent from the desorption zone 400; Specifically, a hydrochloric acid solution with a mass fraction of 4% is used as the desorption liquid, water is distributed from the H zone, the water from the H zone flows countercurrently to the G zone, and the water from the G zone is collected; In the I and J zones, no water is distributed, and only the negative pressure assembly is operated, so that the water from the desorption zone 400 in the adsorbent loading mechanism 2 and the liquid collecting tray 43 is drained and exhausted; S4: Return the adsorbent loading mechanism 2 to the adsorption area 100 along the closed route, and repeat steps S1 to S3.

[0066] The concentrations of various ions (mg / L) in the treated liquid, the effluent from area A, the effluent from area D, and the effluent from area G are shown in Table 2.

[0067] Table 2 As shown in Table 2, the concentrations of Ca²⁺ and Mg²⁺ in the treated liquid were 10.25 mg / L and 5.52 mg / L, respectively. After treatment in zone A (adsorption zone), they were reduced to 0.24 mg / L and 0.15 mg / L, respectively. The adsorption rates of calcium and magnesium by the resin were 97.7% and 97.3%, respectively, while the loss of Li ions was only 0.002%, indicating that the D403 resin had a highly selective adsorption effect on calcium and magnesium ions, but had a poor adsorption capacity for lithium ions. After the resin was washed in zone D and desorbed in zone G, the concentrations of Ca²⁺ and Mg²⁺ in the desorbed liquid were 2.12 mg / L and 1.05 mg / L, respectively. The desorption rates of the resin reached 95.6% and 96.8%, and the resin was basically regenerated, and the system basically reached adsorption and desorption equilibrium. The system can effectively reduce the concentration ratio of calcium and magnesium / lithium in lithium concentrate, and effectively reduce the loss of lithium in the impurity removal process while achieving efficient removal of calcium and magnesium.

Claims

1. A continuous water treatment device without adsorbent transport, comprising a frame (1), characterized in that: At least one adsorbent loading structure for loading an adsorbent is movably arranged on the frame (1), and the adsorbent loading structure moves on a closed route so as to utilize the adsorbent therein for water treatment and returns to the starting point together with the adsorbent after the water treatment is completed.

2. The continuous water treatment device according to claim 1, characterized in that: One or more adsorbent loading structures are running 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 according to claim 1, characterized in that: The closed route at least comprises an adsorption zone (100), a washing zone (300) and a desorption zone (400) which are arranged in sequence and connected end to end, and the frame (1) is provided with: An adsorption spray component and an adsorption collection component corresponding to the adsorption zone (100), the adsorption spray component being used to spray the liquid to be treated onto the adsorbent, and the adsorption collection component being used to collect water discharged from the adsorption zone; A washing spray assembly and a washing collection assembly corresponding to the washing zone (300), the washing spray assembly being used to spray washing liquid onto the adsorbent, and the washing collection assembly being used to collect water discharged from the washing zone; A desorption spray assembly and a desorption collection assembly corresponding to the desorption zone (400), the desorption spray assembly being used to spray desorption liquid onto the adsorbent, and the desorption collection assembly being used to collect water effluent from the desorption zone; A negative pressure component used to force the liquid to be treated, the washing liquid or the desorbed liquid to flow through the adsorbent and be collected.

4. The continuous water treatment device according to claim 3, characterized in that: A draining zone is provided between any two of the adsorption zone (100), the washing zone (300) and the desorption zone (400), and no spraying component is provided in the draining zone or a spraying component is provided but does not work.

5. The continuous water treatment device according to claim 1, characterized in that: The frame (1) is provided with a track (11) for guiding the operation of the adsorbent loading mechanism (2); Alternatively, a turntable (21) is rotatably mounted on the frame (1), and the adsorbent loading mechanism (2) is fixedly mounted on the turntable (21).

6. The continuous water treatment device according to claim 5, characterized in that: The adsorbent loading mechanism (2) comprises at least an inner guardrail (23) and an outer guardrail (24), wherein an adsorbent tank (25) for loading the adsorbent is formed between the inner guardrail (23) and the outer guardrail (24); The inner guardrail (23) and the outer guardrail (24) are connected end to end, are fixedly connected to or integrally formed with the turntable (21), and are concentrically or eccentrically arranged. The adsorbent groove (25) is in a regular or irregular ring shape.

7. The continuous water treatment device according to claim 6, characterized in that: A filter cloth is provided in the adsorbent tank (25), and the filling depth of the adsorbent on the filter cloth is 5-50 cm. A plurality of filter holes corresponding to the positions of the adsorbent tank (25) are formed on the rotating disk (21); The frame (1) is fixedly provided with a liquid collecting tray (43) located below the rotating disk (21), and the liquid collecting tray (43) is sealedly connected to the rotating disk (21); The closed route comprises a plurality of functional areas connected end to end, and the frame (1) is provided with a liquid collecting tank (42) corresponding to each functional area one by one, and the liquid collecting tank (42) is connected to the liquid collecting tray (43) via an independent liquid collecting pipe (41).

8. A continuous water treatment method without adsorbent transport, characterized in that: The method is implemented using the continuous water treatment device according to any one of claims 1 to 7, and the method comprises the following steps: S1: allowing an adsorbent loading structure filled with adsorbent to run to the adsorption area (100), allowing the adsorption spraying component to spray the liquid to be treated onto the adsorbent, and allowing the adsorption collecting component to collect water discharged from the adsorption area (100); S2: causing the adsorbent loading mechanism (2) to continue to run to the washing area (300), causing the washing spray component to spray the washing liquid onto the adsorbent, and causing the washing collection component to collect water discharged from the washing area (300); S3: the adsorbent loading mechanism (2) continues to run to the desorption zone (400), the desorption spraying component sprays the desorption liquid onto the adsorbent, and the desorption collecting component collects the water discharged from the desorption zone (400); S4: returning the adsorbent loading mechanism (2) along a closed route to the adsorption zone (100), and repeating steps S1-S3.

9. The water treatment method according to claim 8, characterized in that: At least one of the following steps is also included: (1) After step S1 is completed, the adsorbent loading mechanism (2) is first operated to the first draining area (200), and the residual liquid to be treated in the adsorbent loading mechanism (2) and the liquid collecting tray (43) is drained by a negative pressure component before step S2 is performed; (2) After step S2 is completed, the adsorbent loading mechanism (2) is first operated to the second draining zone, and the residual washing liquid in the adsorbent loading mechanism (2) and the liquid collecting tray (43) is drained by the negative pressure component before step S3 is performed; (3) After step S3 is completed, the adsorbent loading mechanism (2) is first operated to the third draining zone (500), and the residual desorption liquid in the adsorbent loading mechanism (2) and the liquid collecting tray (43) is drained by the negative pressure component before step S4 is performed.

10. The continuous water treatment method according to claim 8, characterized in that: The adsorption area (100) comprises at least a secondary adsorption area (101) and a primary adsorption area (102) which are sequentially arranged along a closed route; the adsorption spray assembly comprises at least a secondary adsorption spray pipe (31a) and a primary adsorption spray pipe (31b) which are sequentially arranged along the closed route; and the adsorption collection assembly comprises at least a secondary adsorption liquid collecting pipe (41a) and a primary adsorption liquid collecting pipe (41b) which are sequentially arranged along the closed route. In the step S1, the first-level adsorption spray pipe (31b) sprays the liquid to be treated toward the first-level adsorption zone (102), the first-level adsorption liquid collecting pipe (41b) collects the effluent from the first-level adsorption zone (102) and sends it to the second-level adsorption spray pipe (31a) in a countercurrent manner, and then the second-level adsorption spray pipe (31a) sprays the effluent from the first-level adsorption zone (102) toward the second-level adsorption zone (101), and the second-level adsorption liquid collecting pipe (41a) collects the effluent from the second-level adsorption zone (101).

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