Adsorption recovery device

Abstract

The utility model relates to the technical field of wastewater treatment, and provides an adsorption recovery device which comprises a pretreatment mechanism, a lithium adsorption mechanism and an organic matter adsorption mechanism which are sequentially connected in the wastewater treatment direction. The wastewater is sequentially subjected to desorption lithium extraction and adsorption organic matter removal, so that lithium ions and organic matters in the wastewater are effectively removed. Furthermore, the lithium adsorption tower and the organic matter adsorption tower are subjected to desorption regeneration, so that the device has the characteristics of environmental protection, energy conservation and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to an adsorption recovery device. BACKGROUND

[0002] The petrochemical industry rubber product production adopts anionic polymerization process, uses butyl lithium as an initiator, uses water analysis method to coagulate, and carries out post-treatment granulation and drying on the coagulated rubber particles. The high-temperature wastewater discharged by each lithium series post-treatment production device contains solid particles such as rubber particles, cyclohexane dissolved in water, and metal lithium ions dissolved in water. Therefore, a green and water-saving treatment technology needs to be provided to remove metal lithium ions and COD (Chemical Oxygen Demand) in high-temperature rubber wastewater. CONTENT OF THE UTILITY MODEL

[0003] Based on this, an embodiment of the present application provides an adsorption recovery device capable of effectively removing metal lithium ions and COD in high-temperature rubber wastewater.

[0004] The present application provides an adsorption recovery device, which comprises a pretreatment mechanism, a lithium adsorption mechanism and an organic matter adsorption mechanism connected in sequence in a wastewater treatment direction.

[0005] The lithium adsorption mechanism comprises a first adsorption assembly and a first desorption regeneration assembly, the first adsorption assembly comprises at least one lithium adsorption tower, the lithium adsorption tower is connected with a water outlet end of the pretreatment mechanism, the first desorption regeneration assembly comprises a new water tank and a first desorption tank group connected with the lithium adsorption tower respectively, the first desorption tank group is used for cleaning and desorbing the lithium adsorption tower, and the new water tank is used for cleaning and regenerating the lithium adsorption tower.

[0006] The organic matter adsorption mechanism comprises a second adsorption assembly and a second desorption regeneration assembly, the second adsorption assembly comprises at least one organic matter adsorption tower, the organic matter adsorption tower is connected with a water outlet end of the lithium adsorption tower, the second desorption regeneration assembly comprises a new acid tank and a second desorption tank group connected with the organic matter adsorption tower respectively, the second desorption tank group is used for cleaning and desorbing the organic matter adsorption tower, and the new acid tank is used for cleaning and regenerating the organic matter adsorption tower.

[0007] In some embodiments, the first desorption tank group comprises a first desorption tank, a second desorption tank and a third desorption tank.

[0008] The first desorption tank and the second desorption tank are respectively connected with a water inlet end of the lithium adsorption tower, the first desorption tank is used for first cleaning and desorbing the lithium adsorption tower, and the second desorption tank is used for second cleaning and desorbing the lithium adsorption tower.

[0009] The third desorption tank is connected with the water outlet end of the lithium adsorption tower, and the third desorption tank is used for storing the desorption liquid after the first cleaning desorption of the lithium adsorption tower.

[0010] In some embodiments, the first desorption tank is also connected with the water outlet end of the lithium adsorption tower, and the first desorption tank is used for storing the desorption liquid after the second cleaning desorption of the lithium adsorption tower; and / or,

[0011] The second desorption tank is also connected with the water outlet end of the lithium adsorption tower, and the second desorption tank is used for storing the desorption liquid after the cleaning regeneration of the lithium adsorption tower, and the second desorption tank is also connected with an acid storage tank, and the acid storage tank is used for providing acid to the second desorption tank.

[0012] In some embodiments, the second desorption tank group includes a fourth desorption tank, a fifth desorption tank, a sixth desorption tank and a seventh desorption tank.

[0013] The fourth desorption tank, the fifth desorption tank and the sixth desorption tank are respectively connected with the water inlet end of the organic matter adsorption tower, the fourth desorption tank is used for first cleaning desorption of the organic matter adsorption tower, the fifth desorption tank is used for second cleaning desorption of the organic matter adsorption tower, and the sixth desorption tank is used for third cleaning desorption of the organic matter adsorption tower.

[0014] The seventh desorption tank is connected with the water outlet end of the organic matter adsorption tower, and the seventh desorption tank is used for storing the desorption liquid after the first cleaning desorption of the organic matter adsorption tower.

[0015] In some embodiments, the fourth desorption tank is also connected with the water outlet end of the organic matter adsorption tower, and the fourth desorption tank is used for storing the desorption liquid after the second cleaning desorption of the organic matter adsorption tower; and / or,

[0016] The fifth desorption tank is also connected with the water outlet end of the organic matter adsorption tower, and the fifth desorption tank is used for storing the desorption liquid after the third cleaning desorption of the organic matter adsorption tower; the fifth desorption tank is also connected with an alkali storage tank, and the alkali storage tank is used for providing alkali to the fifth desorption tank; and / or,

[0017] The sixth desorption tank is also connected with the water outlet end of the organic matter adsorption tower, and the sixth desorption tank is used for storing the desorption liquid after the cleaning regeneration of the organic matter adsorption tower.

[0018] In some embodiments, the pretreatment mechanism includes a filter and a heat exchanger connected in sequence in the wastewater treatment direction.

[0019] In some embodiments, the lithium adsorption mechanism further comprises a first gas source connected to the lithium adsorption tower, the first gas source being used to empty the liquid in the lithium adsorption tower; and / or,

[0020] The organic matter adsorption mechanism further comprises a second gas source connected to the organic matter adsorption tower, the second gas source being used to empty the liquid in the organic matter adsorption tower.

[0021] In some embodiments, the lithium adsorption mechanism further comprises a first resin trap arranged on the pipeline connecting the lithium adsorption tower and the organic matter adsorption tower, the first resin trap being used to filter the adsorbent in the water discharged from the lithium adsorption tower.

[0022] In some embodiments, the adsorption recovery device further comprises a recovered water storage tank connected to the water outlet end of the organic matter adsorption tower, the recovered water storage tank being used to store the wastewater after being adsorbed by the organic matter adsorption tower.

[0023] In some embodiments, the organic matter adsorption mechanism further comprises a second resin trap arranged on the pipeline connecting the organic matter adsorption tower and the recovered water storage tank, the second resin trap being used to trap the adsorbent in the water discharged from the organic matter adsorption tower.

[0024] Compared with the conventional technology, the present application has at least the following beneficial effects:

[0025] The present application can realize the enrichment of lithium ions and organic matter by sequentially adsorbing lithium and removing organic matter from the wastewater containing lithium ions and organic matter, without introducing other impurities, reducing the recovery difficulty, and effectively removing lithium ions and organic matter from the wastewater. Further, the lithium adsorption tower and the organic matter adsorption tower are desorbed and regenerated respectively, and the regeneration method is simple. The treatment device of the present application has a simple structure and high removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of an adsorption recovery device according to an embodiment of the present application;

[0027] Figure 2 FIG. 2 is a structural schematic diagram of a pretreatment mechanism according to an embodiment of the present application;

[0028] Figure 3 FIG. 3 is a structural schematic diagram of a lithium adsorption mechanism according to an embodiment of the present application;

[0029] Figure 4 FIG. 4 is a structural schematic diagram of an organic matter adsorption mechanism according to an embodiment of the present application.

[0030] Wherein, 100 - pretreatment mechanism; 110 - filter; 120 - heat exchanger; 130 - wastewater storage tank; 140 - intermediate water tank; 200 - lithium adsorption mechanism; 210 - lithium adsorption tower; 220 - fresh water tank; 230 - first desorption tank group; 231 - first desorption tank; 232 - second desorption tank; 233 - third desorption tank; 240 - first gas source; 250 - first resin trap; 300 - organic matter adsorption mechanism; 310 - organic matter adsorption tower; 320 - fresh acid tank; 330 - second desorption tank group; 331 - fourth desorption tank; 332 - fifth desorption tank; 333 - sixth desorption tank; 334 - seventh desorption tank; 340 - second gas source; 350 - second resin trap; 400 - gas adsorber; 500 - recycled water storage tank. DETAILED DESCRIPTION

[0031] The application will be described in further detail below with reference to the embodiments and examples. These embodiments and examples are only used to explain the application and not intended to limit the scope of the application. The purpose of providing these embodiments and examples is to make the disclosure of the application more thoroughly and comprehensively understood. It should also be understood that the application can be implemented in many different forms and is not limited to the embodiments and examples described herein. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the application, and the equivalent forms obtained thereby also fall within the protection scope of the application. In addition, in the following description, a large number of specific details are given in order to provide a more complete understanding of the application. It should be understood that the application can be implemented without one or more of these details.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0033] In the present application, "optionally", "optional", "option" means optional, that is, selected from "yes" or "no" two parallel schemes. If there are multiple "optional" in a technical solution, if there is no special description, and there is no contradiction or mutual restriction relationship, each "optional" is independent.

[0034] In the present application, the terms "first", "second", etc. in the "first aspect", "second aspect", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or quantity, nor can it be understood as implying the importance or quantity of the indicated technical features. Moreover, "first", "second", etc. only serve the purpose of non-exhaustive enumeration description, and should be understood as not constituting a closed limitation on the quantity.

[0035] In the present application, the technical features described in an open manner include both the closed technical solutions consisting of the listed features and the open technical solutions containing the listed features.

[0036] In the present application, when referring to a numerical interval (i.e., a numerical range), the distribution of the optional values in the numerical interval is considered to be continuous and includes both numerical endpoints (i.e., the minimum value and the maximum value) of the numerical interval and every value between the two numerical endpoints, unless otherwise specified. When a numerical interval refers only to integers within the numerical interval, unless otherwise specified, the two endpoint integers of the numerical range and every integer between the two endpoints are equivalent to directly listing each integer. When multiple numerical ranges are provided to describe a feature or a characteristic, the numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed in the present application should be understood to include any and all sub-ranges encompassed therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. The "numerical interval" is intended to broadly include quantitative intervals such as percentage intervals, ratio intervals, and value intervals.

[0037] All documents referred to in the present application are incorporated by reference in the present application as if each document were individually incorporated by reference. Unless and to the extent that the incorporated documents conflict with the purpose and / or technical solutions of the present application, the incorporated documents are incorporated in their entirety and for all purposes. When referring to the incorporated documents in the present application, the definitions of the relevant technical features, terms, nouns, phrases, etc. in the incorporated documents are also incorporated. When referring to the incorporated documents in the present application, the examples and preferred modes of the relevant technical features are also incorporated by reference, subject to the implementation of the present application. It should be understood that when the incorporated content conflicts with the description in the present application, the present application is given priority or is modified according to the description in the present application.

[0038] In the conventional technology, chemical precipitation is used to remove lithium ions in wastewater, and the treatment effect is stable and reliable, the process is mature, however, the chemical precipitation method has the disadvantages of high reagent consumption, high treatment cost, and generation of a large amount of waste residue, and is not suitable for wastewater treatment with low ion content. If not properly treated, it can easily cause secondary pollution and cannot effectively recover metal elements.

[0039] The present application provides an adsorption recovery device, as shown in Figures 1-4 The adsorption recovery device includes, in sequence along the wastewater treatment direction, a pretreatment mechanism 100, a lithium adsorption mechanism 200, and an organic matter adsorption mechanism 300.

[0040] As shown in Figure 3As shown, the lithium adsorption mechanism 200 includes a first adsorption assembly and a first desorption regeneration assembly, the first adsorption assembly includes at least one lithium adsorption tower 210, the lithium adsorption tower 210 is connected with the water outlet end of the pretreatment mechanism 100, the first desorption regeneration assembly includes a new water tank 220 and a first desorption tank group 230 connected with the lithium adsorption tower 210 respectively, the first desorption tank group 230 is used for cleaning and desorbing the lithium adsorption tower 210, and the new water tank 220 is used for cleaning and regenerating the lithium adsorption tower 210.

[0041] As shown, Figure 4 The organic matter adsorption mechanism 300 includes a second adsorption assembly and a second desorption regeneration assembly, the second adsorption assembly includes at least one organic matter adsorption tower 310, the organic matter adsorption tower 310 is connected with the water outlet end of the lithium adsorption tower 210, the second desorption regeneration assembly includes a new acid tank 320 and a second desorption tank group 330 connected with the organic matter adsorption tower 310 respectively, the second desorption tank group 330 is used for cleaning and desorbing the organic matter adsorption tower 310, and the new acid tank 320 is used for cleaning and regenerating the organic matter adsorption tower 310.

[0042] The present application can realize the enrichment of lithium ions and organic matter by sequentially adsorbing lithium and removing organic matter, without introducing other impurities, reducing the recovery difficulty, and effectively removing lithium ions and organic matter in wastewater. Further, the lithium adsorption tower 210 and the organic matter adsorption tower 310 are regenerated by desorption, and the regeneration method is simple. The treatment device of the present application has simple structure and high removal efficiency.

[0043] It should be noted that the cleaning and desorption of the lithium adsorption tower 210 in the present application refers to the cleaning and desorption of the adsorbent in the lithium adsorption tower 210; the cleaning and regeneration of the lithium adsorption tower 210 refers to the cleaning and regeneration of the adsorbent in the lithium adsorption tower 210. Similarly, the cleaning and desorption of the organic matter adsorption tower 310 in the present application refers to the cleaning and desorption of the adsorbent in the organic matter adsorption tower 310; the cleaning and regeneration of the organic matter adsorption tower 310 refers to the cleaning and regeneration of the adsorbent in the organic matter adsorption tower 310.

[0044] It can be understood that the present application does not make specific requirements and special limitations on the adsorbent in the lithium adsorption tower 210, and can realize the adsorption of lithium ions. For example, the adsorbent can be a cation exchange resin with sulfonic acid group (-SO3H) on the styrene-divinylbenzene copolymer.

[0045] It can be understood that the present application does not make specific requirements and special limitations on the adsorbent in the organic matter adsorption tower 310, and can realize the adsorption of organic matter. For example, the adsorbent can be an adsorbent that adsorbs organic matter on the adsorbent through intermolecular forces.

[0046] It can be understood that the desorption agent used in the first desorption tank group 230 corresponds to the adsorbent in the lithium adsorption tower 210, and the desorption agent used can desorb the adsorbent in the lithium adsorption tower 210. The desorption agent used in the second desorption tank group 330 corresponds to the adsorbent in the organic matter adsorption tower 310, and the desorption agent used can desorb the adsorbent in the organic matter adsorption tower 310.

[0047] In some embodiments, as shown in FIG. 2, a plurality of lithium adsorption towers 210 are connected in series or in parallel. When the plurality of lithium adsorption towers 210 are connected in parallel, the lithium adsorption towers 210 can be started and stopped to regulate the desorption state and the adsorption state of the lithium adsorption towers 210, thereby realizing continuous treatment of the wastewater. That is, after one lithium adsorption tower 210 completes adsorption, another lithium adsorption tower 210 is started for adsorption, and then the lithium adsorption tower 210 that has completed adsorption is desorbed. Figure 3

[0048] It should be noted that the connection mode of each device in the present application can be connected through a pipeline, and further, a valve can be provided to control the communication of each pipeline.

[0049] In some embodiments, as shown in FIG. 2, a plurality of lithium adsorption towers 210 are connected in series or in parallel. When the plurality of lithium adsorption towers 210 are connected in parallel, the lithium adsorption towers 210 can be started and stopped to regulate the desorption state and the adsorption state of the lithium adsorption towers 210, thereby realizing continuous treatment of the wastewater. That is, after one lithium adsorption tower 210 completes adsorption, another lithium adsorption tower 210 is started for adsorption, and then the lithium adsorption tower 210 that has completed adsorption is desorbed. Figure 4

[0050] In some embodiments, as shown in FIG. 2, a plurality of lithium adsorption towers 210 are connected in series or in parallel. When the plurality of lithium adsorption towers 210 are connected in parallel, the lithium adsorption towers 210 can be started and stopped to regulate the desorption state and the adsorption state of the lithium adsorption towers 210, thereby realizing continuous treatment of the wastewater. That is, after one lithium adsorption tower 210 completes adsorption, another lithium adsorption tower 210 is started for adsorption, and then the lithium adsorption tower 210 that has completed adsorption is desorbed. Figure 3

[0051] The first desorption tank 231 and the second desorption tank 232 are respectively connected to the water inlet end of the lithium adsorption tower 210, and the first desorption tank 231 is used for first cleaning desorption of the lithium adsorption tower 210, and the second desorption tank 232 is used for second cleaning desorption of the lithium adsorption tower 210.

[0052] The third desorption tank 233 is connected to the water outlet end of the lithium adsorption tower 210, and the third desorption tank 233 is used for storing the desorption liquid of the lithium adsorption tower 210 after first cleaning desorption, i.e., the lithium-rich desorption liquid.

[0053] In some embodiments, the first desorption tank 231 is also connected to the water outlet end of the lithium adsorption tower 210, and the first desorption tank 231 is used for storing the desorption liquid of the lithium adsorption tower 210 after second cleaning desorption. ​​​

[0054] In some embodiments, the second desorption tank 232 is also connected to the outlet of the lithium adsorption tower 210. The second desorption tank 232 is used to store the desorption liquid after the lithium adsorption tower 210 has been cleaned and regenerated. The second desorption tank 232 is also connected to an acid storage tank, which is used to supply acid to the second desorption tank 232.

[0055] The first desorption tank group 230 of this application is configured as described above. By repeatedly cleaning and desorbing the lithium adsorption tower 210 after adsorption, using the desorption liquid after the second cleaning and desorption as the eluent for the first cleaning and desorption, and using the desorption liquid after cleaning and regeneration in the new water tank 220 as the eluent for the first cleaning and desorption, not only can the water consumption be reduced, but the enrichment effect of lithium ions can also be improved.

[0056] It is understandable that hydrochloric acid solution can be used as the eluent for cleaning and desorption of lithium adsorption tower 210, and the appropriate hydrochloric acid concentration can be selected according to the type of adsorbent.

[0057] In some embodiments, such as Figure 4 As shown, the second desorption tank group 330 includes a fourth desorption tank 331, a fifth desorption tank 332, a sixth desorption tank 333, and a seventh desorption tank 334.

[0058] The fourth desorption tank 331, the fifth desorption tank 332 and the sixth desorption tank 333 are respectively connected to the water inlet of the organic matter adsorption tower 310. The fourth desorption tank 331 is used to perform the first cleaning and desorption of the organic matter adsorption tower 310, the fifth desorption tank 332 is used to perform the second cleaning and desorption of the organic matter adsorption tower 310, and the sixth desorption tank 333 is used to perform the third cleaning and desorption of the organic matter adsorption tower 310.

[0059] The seventh desorption tank 334 is connected to the outlet of the organic matter adsorption tower 310. The seventh desorption tank 334 is used to store the desorption liquid after the first washing and desorption of the organic matter adsorption tower 310, namely the COD desorption liquid.

[0060] In some embodiments, the fourth desorption tank 331 is also connected to the outlet of the organic adsorption tower 310, and the fourth desorption tank 331 is used to store the desorption liquid after the organic adsorption tower 310 has undergone the second washing and desorption.

[0061] In some embodiments, the fifth desorption tank 332 is also connected to the outlet of the organic matter adsorption tower 310. The fifth desorption tank 332 is used to store the desorption liquid after the third washing and desorption of the organic matter adsorption tower 310. The fifth desorption tank 332 is also connected to an alkali storage tank, which is used to supply alkali to the fifth desorption tank 332.

[0062] In some embodiments, the sixth desorption tank 333 is also connected to the outlet of the organic adsorption tower 310, and the sixth desorption tank 333 is used to store the desorption liquid after the organic adsorption tower 310 has been cleaned and regenerated.

[0063] The application sets the second desorption tank group 330 as described above, and the organic matter adsorption tower 310 is cleaned and desorbed multiple times, and the desorption liquid after the second cleaning and desorption is used as the eluent for the first cleaning and desorption, the desorption liquid after the third cleaning and desorption is used as the eluent for the second cleaning and desorption, and the desorption liquid after the cleaning and regeneration is used as the eluent for the third cleaning and desorption. The enrichment effect of organic matter is improved, and the water consumption is reduced.

[0064] It can be understood that the eluent used for cleaning and desorption in the organic matter adsorption tower 310 can be a sodium hydroxide solution, and the appropriate concentration of sodium hydroxide can be selected according to the type of adsorbent. Hydrochloric acid can be used in the new acid tank 320 to clean and regenerate the organic matter adsorption tower 310.

[0065] In some embodiments, as shown in Figure 2 The pretreatment mechanism 100 includes a filter 110 and a heat exchanger 120 connected in sequence in the wastewater treatment direction. Optionally, the pretreatment mechanism 100 further includes a wastewater storage tank 130 and an intermediate water tank 140. The wastewater storage tank 130 is connected to the inlet of the filter 110 to provide wastewater to the filter 110. The intermediate water tank 140 is connected to the outlet of the heat exchanger 120 to store pretreated wastewater, which is ready to be provided to the lithium adsorption tower 210. The application filters and heats the wastewater to reduce solid particles in the wastewater and reduce the temperature of the wastewater, realizes resource utilization, and reduces the influence of SS (suspended substance) and temperature on the adsorption treatment effect of the adsorbent in the lithium adsorption tower 210 and the adsorbent in the organic matter adsorption tower 310.

[0066] In some embodiments, as shown in Figure 3 The lithium adsorption mechanism 200 further includes a first gas source 240 connected to the lithium adsorption tower 210, and the first gas source 240 is used to empty the liquid in the lithium adsorption tower 210.

[0067] In some embodiments, as shown in Figure 4 The organic matter adsorption mechanism 300 further includes a second gas source 340 connected to the organic matter adsorption tower 310, and the second gas source 340 is used to empty the liquid in the organic matter adsorption tower 310.

[0068] The application uses a gas source to empty the liquid in the lithium adsorption tower 210 and the organic matter adsorption tower 310, thereby completing the cleaning and regeneration of the adsorption tower, and preparing for the adsorption treatment of wastewater again.

[0069] In some embodiments, as shown in Figure 3As shown, the lithium adsorption mechanism 200 further comprises a first resin trap 250, which is arranged on the pipeline connecting the lithium adsorption tower 210 and the organic matter adsorption tower 310, and is used to filter the adsorbent in the water discharged from the lithium adsorption tower 210.

[0070] In some embodiments, as also shown in Figure 4 As shown, the adsorption recovery device further comprises a recovered water storage tank 500, which is connected to the water outlet end of the organic matter adsorption tower 310 and is used to store the wastewater after being adsorbed by the organic matter adsorption tower 310. It can be understood that the recovered water storage tank 500 can be connected to the new water tank 220 and the new acid tank 320 respectively, thereby providing recycled water for the new water tank 220 and the new acid tank 320.

[0071] In some embodiments, as also shown in Figure 4 As shown, the organic matter adsorption mechanism 300 further comprises a second resin trap 350, which is arranged on the pipeline connecting the organic matter adsorption tower 310 and the recovered water storage tank 500, and is used to trap the adsorbent in the water discharged from the organic matter adsorption tower 310.

[0072] In some embodiments, as also shown in Figure 3 and Figure 4 As shown, the adsorption recovery device further comprises a gas adsorber 400, which is connected to the lithium adsorption tower 210 and the organic matter adsorption tower 310 respectively, and is used to absorb and purify the exhaust gas of the lithium adsorption tower 210 and the organic matter adsorption tower 310.

[0073] Exemplarily, a method for extracting lithium and removing COD from wastewater by using the above-mentioned adsorption recovery device is provided, which comprises the following steps:

[0074] S1, high-temperature organic wastewater containing lithium ions (85℃) is introduced into the wastewater storage tank 130 for storage, then the wastewater in the wastewater storage tank 130 is introduced into the filter 110 for filtration to remove solid particles in the wastewater, and then the wastewater is heat-exchanged and cooled to be discharged into the intermediate water tank 140. The temperature of the wastewater in the intermediate water tank 140 is 40℃, the lithium ion content is 16mg / L, and the COD is 180mg / L.

[0075] S2, the waste water in the intermediate water tank 140 is introduced into a lithium adsorption tower 210 to adsorb lithium ions in the waste water, and after the adsorption is completed, the water supply is stopped, and the lithium adsorption tower 210 after the adsorption is completed is subjected to desorption treatment; first, the eluent in the first desorption tank 231 is introduced into the lithium adsorption tower 210 to perform first cleaning and desorption, and the desorption solution after the first cleaning and desorption is stored in the third desorption tank 233, the lithium ion content of the desorption solution in the third desorption tank 233 is ≥5000mg / L, and subsequent purification treatment is carried out; then, the eluent in the second desorption tank 232 is introduced into the lithium adsorption tower 210 to perform second cleaning and desorption, and the desorption solution after the second cleaning and desorption is introduced into the first desorption tank 231 as the eluent for the first cleaning and desorption; finally, the water in the new water tank 220 is introduced into the lithium adsorption tower 210 to perform cleaning and regeneration, and after the cleaning and regeneration, the desorption solution is emptied into the second desorption tank 232 by using the first gas source 240 for standby, and the acid storage tank provides hydrochloric acid with a mass concentration of 31% to the second desorption tank 232 to configure a hydrochloric acid solution with a mass concentration of 8% as the eluent for the second cleaning and desorption.

[0076] It can be understood that after the lithium adsorption tower 210 is adsorbed, the waste water can be introduced into another lithium adsorption tower 210 connected in parallel for adsorption to realize continuous treatment of the waste water.

[0077] S3, the waste water after the lithium adsorption tower 210 adsorption is treated by the first resin trap 250 and then enters the organic matter adsorption tower 310, and after the organic matter adsorption tower 310 adsorption is completed, the organic matter adsorption tower 310 is subjected to desorption and regeneration; first, the eluent in the fourth desorption tank 331 is introduced into the organic matter adsorption tower 310 to perform first cleaning and desorption, and the desorption solution after the first cleaning and desorption is stored in the seventh desorption tank 334 for storage and further treatment; then, the eluent in the fifth desorption tank 332 is introduced into the organic matter adsorption tower 310 to perform second cleaning and desorption, and the desorption solution after the second cleaning and desorption enters the fourth desorption tank 331 as the eluent; then, the eluent in the sixth desorption tank 333 is introduced into the organic matter adsorption tower 310 to perform third cleaning and desorption, and the desorption solution after the third cleaning and desorption enters the fifth desorption tank 332 for standby, and the alkali storage tank provides sodium hydroxide with a mass concentration of 32% to the fifth desorption tank 332 to configure a sodium hydroxide solution with a mass concentration of 6% as the eluent; finally, the eluent in the new acid tank 320 is introduced into the organic matter adsorption tower 310 to perform cleaning and regeneration, and after the cleaning and regeneration, the desorption solution is emptied into the sixth desorption tank 333 by using the second gas source 340 as the eluent for standby.

[0078] It can be understood that after the organic matter adsorption tower 310 is adsorbed, the waste water can be introduced into another organic matter adsorption tower 310 connected in parallel for adsorption to realize continuous treatment of the waste water.

[0079] S4, the wastewater after adsorption by the organic adsorption tower 310 is treated by the second resin trap 350 and then enters the recovered water storage tank 500 for standby, the lithium ion content in the recovered water is 0.7 ppm, and the COD is 43 mg / L. The recovered water in the recovered water storage tank 500 can be introduced into the new acid tank 320 and the new water tank 220 for use, or can be directly discharged.

[0080] It can be understood that when the adsorption recovery device is started for the first time, the prepared dilute acid eluent (for example, it can be an 8% hydrochloric acid solution) and dilute base eluent (for example, it can be a 6% sodium hydroxide solution) can be directly used for desorption regeneration. When the device is stably running, the desorption liquid can be recycled.

[0081] In summary, the present application can realize the enrichment of lithium ions and organic matter by sequentially adsorbing lithium ions and removing organic matter from the organic wastewater containing lithium ions, without introducing other impurities, reducing the recovery difficulty, and effectively removing lithium ions and organic matter from the wastewater. Further, the lithium adsorption tower 210 and the organic matter adsorption tower 310 are regenerated by desorption, and the regeneration method is simple.

[0082] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0083] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An adsorption and recovery device, characterized in that, The adsorption and recovery device includes a pretreatment mechanism, a lithium adsorption mechanism, and an organic matter adsorption mechanism connected sequentially along the wastewater treatment direction. The lithium adsorption mechanism includes a first adsorption component and a first desorption and regeneration component. The first adsorption component includes at least one lithium adsorption tower, which is connected to the outlet of the pretreatment mechanism. The first desorption and regeneration component includes a new water tank and a first desorption tank group, which are respectively connected to the lithium adsorption tower. The first desorption tank group is used to clean and desorb the lithium adsorption tower, and the new water tank is used to clean and regenerate the lithium adsorption tower. The organic matter adsorption mechanism includes a second adsorption component and a second desorption and regeneration component. The second adsorption component includes at least one organic matter adsorption tower connected to the outlet of the lithium adsorption tower. The second desorption and regeneration component includes a new acid tank and a second desorption tank group connected to the organic matter adsorption tower. The second desorption tank group is used to clean and desorb the organic matter adsorption tower, and the new acid tank is used to clean and regenerate the organic matter adsorption tower.

2. The adsorption and recovery device as described in claim 1, characterized in that, The first desorption tank group includes a first desorption tank, a second desorption tank, and a third desorption tank; The first desorption tank and the second desorption tank are respectively connected to the water inlet of the lithium adsorption tower. The first desorption tank is used to perform a first cleaning and desorption on the lithium adsorption tower, and the second desorption tank is used to perform a second cleaning and desorption on the lithium adsorption tower. The third desorption tank is connected to the outlet of the lithium adsorption tower, and the third desorption tank is used to store the desorption liquid of the lithium adsorption tower after the first washing and desorption.

3. The adsorption and recovery device as described in claim 2, characterized in that, The first desorption tank is also connected to the outlet of the lithium adsorption tower, and the first desorption tank is used to store the desorption liquid after the lithium adsorption tower has undergone the second washing and desorption; and / or, The second desorption tank is also connected to the outlet of the lithium adsorption tower. The second desorption tank is used to store the desorption liquid after the lithium adsorption tower has been cleaned and regenerated. The second desorption tank is also connected to an acid storage tank, which is used to supply acid to the second desorption tank.

4. The adsorption and recovery device as described in claim 1, characterized in that, The second desorption tank group includes a fourth desorption tank, a fifth desorption tank, a sixth desorption tank, and a seventh desorption tank; The fourth, fifth, and sixth desorption tanks are respectively connected to the inlet of the organic matter adsorption tower. The fourth desorption tank is used to perform a first cleaning and desorption of the organic matter adsorption tower, the fifth desorption tank is used to perform a second cleaning and desorption of the organic matter adsorption tower, and the sixth desorption tank is used to perform a third cleaning and desorption of the organic matter adsorption tower. The seventh desorption tank is connected to the outlet of the organic adsorption tower, and the seventh desorption tank is used to store the desorption liquid after the organic adsorption tower has undergone the first washing and desorption.

5. The adsorption and recovery device as described in claim 4, characterized in that, The fourth desorption tank is also connected to the effluent end of the organic matter adsorption tower, and the fourth desorption tank is used to store the desorption liquid after the second washing and desorption of the organic matter adsorption tower; and / or, The fifth desorption tank is also connected to the effluent end of the organic matter adsorption tower, and is used to store the desorption liquid after the third washing and desorption of the organic matter adsorption tower; the fifth desorption tank is also connected to an alkali storage tank, which is used to supply alkali to the fifth desorption tank; and / or, The sixth desorption tank is also connected to the outlet of the organic adsorption tower, and the sixth desorption tank is used to store the desorption liquid after the organic adsorption tower has been cleaned and regenerated.

6. The adsorption and recovery device according to any one of claims 1-5, characterized in that, The pretreatment unit includes a filter and a heat exchanger connected sequentially along the wastewater treatment direction.

7. The adsorption and recovery device according to any one of claims 1-5, characterized in that, The lithium adsorption mechanism further includes a first gas source connected to the lithium adsorption tower, the first gas source being used to drain the liquid inside the lithium adsorption tower; and / or The organic matter adsorption mechanism further includes a second gas source, which is connected to the organic matter adsorption tower and is used to drain the liquid inside the organic matter adsorption tower.

8. The adsorption and recovery device according to any one of claims 1-5, characterized in that, The lithium adsorption mechanism further includes a first resin trap, which is disposed on the pipeline connecting the lithium adsorption tower and the organic matter adsorption tower. The first resin trap is used to filter the adsorbent in the water discharged from the lithium adsorption tower.

9. The adsorption and recovery device according to any one of claims 1-5, characterized in that, The adsorption and recovery device also includes a recovery water storage tank, which is connected to the outlet of the organic matter adsorption tower. The recovery water storage tank is used to store the wastewater after it has been adsorbed by the organic matter adsorption tower.

10. The adsorption and recovery device as described in claim 9, characterized in that, The organic matter adsorption mechanism further includes a second resin trap, which is installed on the pipeline connecting the organic matter adsorption tower and the recycled water storage tank. The second resin trap is used to capture the adsorbent in the water discharged from the organic matter adsorption tower.

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