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CN-224207775-U - Concentration system of target material in solution

CN224207775UCN 224207775 UCN224207775 UCN 224207775UCN-224207775-U

Abstract

A system for concentrating a target material in a solution is provided. The concentration system comprises a separation device (1), a semi-permeable device (2), a concentrated solution discharge pipeline (3), a diluted auxiliary solution discharge pipeline (4), a target solution flow path, and an auxiliary solution flow path (6), wherein the concentration system comprises a separation step for separating a solution into a target solution and a liquid discharge having a target material concentration lower than that of the target solution and a target solution osmotic pressure higher than or equal to that of the target solution, and a semi-permeable step for concentrating the target solution by passing the target solution through one side of the semi-permeable membrane and passing the auxiliary solution at least partially containing the liquid discharge through the other side of the semi-permeable membrane, wherein when the osmotic pressure of the liquid discharge is higher than that of the target solution, mechanical pressure or not is applied in the semi-permeable step, and when the osmotic pressure of the liquid discharge is equal to that of the target solution, mechanical pressure is applied in the semi-permeable step.

Inventors

  • CHEN BAIYUAN
  • GODA SHOHEI
  • SAKAI TAKASHI

Assignees

  • 东洋纺艾睦希(上海)国际贸易有限公司
  • 东洋纺MC株式会社

Dates

Publication Date
20260508
Application Date
20250407

Claims (10)

  1. 1. A system for concentrating a target material in a solution, comprising: A separation device configured to separate the solution into a target liquid and a drain liquid having a target material concentration lower than the target liquid and a osmotic pressure higher than or equal to the target liquid, the separation device having a solution introduction line, a separation assembly, a target liquid discharge line, and a drain liquid discharge line; A semi-permeable device configured to concentrate the subject fluid and dilute at least a portion of the secondary fluid comprising the liquid discharge, the semi-permeable device comprising a single-stage or multi-stage semi-permeable assembly having a semi-permeable membrane and a vessel, an interior space of the vessel being divided by the semi-permeable membrane into a first chamber having a subject fluid inlet and a subject fluid outlet and a second chamber having a secondary fluid inlet and a secondary fluid outlet; a concentrate discharge line; a dilution auxiliary liquid discharge line; A target liquid flow path which communicates with the target liquid discharge line of the separator, the first chamber of the semipermeable module of each stage of the semipermeable device, and the concentrate discharge line, and An auxiliary liquid flow path which communicates the drain discharge line of the separator, the second chamber of the semipermeable module of each stage of the semipermeable device, and a dilution auxiliary liquid discharge line, Wherein, the The object liquid flow path is configured such that an object liquid inlet of a semipermeable module of each stage is connected to the object liquid discharge pipe of the separator or to an object liquid outlet of another semipermeable module, and that an object liquid inlet of a semipermeable module of at least any one stage is connected to the object liquid discharge pipe of the separator, an object liquid outlet of a semipermeable module of at least any one stage is connected to the concentrate discharge pipe, The auxiliary liquid flow path is arranged such that the auxiliary liquid inlet of the semi-permeable module of each stage is connected to the liquid discharge and discharge line of the separator or to the auxiliary liquid outlet of the other semi-permeable module, and the auxiliary liquid inlet of the semi-permeable module of at least any stage is connected to the liquid discharge and discharge line of the separator, and the auxiliary liquid outlet of the semi-permeable module of at least any stage is connected to the diluted auxiliary liquid discharge line.
  2. 2. The system for concentrating a target material in a solution according to claim 1, The semi-permeable device comprises a single stage semi-permeable module, The object liquid inlet of the semi-permeable component is connected with the object liquid discharge pipeline of the separating device, the object liquid outlet of the semi-permeable component is connected with the concentrated liquid discharge pipeline, The auxiliary liquid inlet of the semi-permeable component is connected with the liquid discharge and discharge pipeline of the separation device, and the auxiliary liquid outlet of the semi-permeable component is connected with the diluted auxiliary liquid discharge pipeline.
  3. 3. The system for concentrating a target material in a solution according to claim 1, wherein the semi-permeable device comprises a plurality of stages of semi-permeable components in sequence along the flow direction of the target liquid, The object liquid inlet of the first-stage semi-permeable component is connected with the object liquid discharge pipeline of the separation device, The object liquid inlet of each semi-permeable module except the first semi-permeable module is connected with the object liquid outlet of the former semi-permeable module or with the object liquid discharge pipeline of the separation device, And the object liquid outlet of the final-stage semi-permeable component is connected with the concentrated liquid discharge pipeline.
  4. 4. A system for concentrating a target material in a solution according to claim 3, The auxiliary liquid inlet of the first-stage semi-permeable component is connected with the liquid discharge and discharge pipeline of the separation device, The auxiliary liquid inlet of the semi-permeable module of each stage except the first semi-permeable module is connected with the auxiliary liquid outlet of the semi-permeable module of the previous stage or connected with the liquid discharge and discharge pipeline of the separation device, The auxiliary liquid outlet of the last-stage semi-permeable component is connected with the diluting auxiliary liquid discharge pipeline, The auxiliary liquid outlet of the semi-permeable modules of each stage except the semi-permeable module of the last stage is connected with the auxiliary liquid inlet of the semi-permeable module of the next stage or connected with the diluted auxiliary liquid discharge pipeline.
  5. 5. A system for concentrating a target material in a solution according to claim 3, wherein an auxiliary liquid inlet of a first stage semipermeable component is connected to said liquid discharge outlet of said separation device, The auxiliary liquid inlet of the semi-permeable module of each stage except the first stage semi-permeable module is connected with the auxiliary liquid outlet of the semi-permeable module of the previous stage, And an auxiliary liquid outlet of the final-stage semi-permeable assembly is connected with the diluting auxiliary liquid discharge pipeline.
  6. 6. The system for concentrating a target material in a solution according to any one of claims 1 to 5, wherein the separation module comprises at least one selected from the group consisting of an adsorbent, a solvent extraction, a molecular sieve, a nanofiltration membrane, and an ion exchange resin.
  7. 7. The system for concentrating a target material in a solution according to any one of claims 1 to 5, further comprising a pretreatment device, The pretreatment device is positioned between the separation device and the semi-permeable device, The pretreatment device comprises at least any one selected from the group consisting of a microfiltration membrane and an ultrafiltration membrane.
  8. 8. The system for concentrating a target material in a solution according to any one of claim 1 to 5, further comprising a pre-concentration device, The pre-concentration device is positioned between the separation device and the semi-permeable device, The pre-concentration device comprises a reverse osmosis membrane or an evaporation pond.
  9. 9. The system for concentrating a target material in solution according to any one of claims 1 to 5, wherein the semi-permeable membrane is a hollow fiber membrane.
  10. 10. The system for concentrating a target material in a solution according to any one of claim 1 to 5, further comprising a pressurizing device, The pressurizing means is arranged to apply mechanical pressure to at least any one of the stages of the semipermeable assembly comprised by the semipermeable means.

Description

Concentration system of target material in solution Technical Field The utility model relates to a concentration system of target materials in solution, and belongs to the field of material concentration. Background Currently, as a method for concentrating a target material in a solution, there are mainly an adsorbent method, a nanofiltration method, a forward osmosis method, a reverse osmosis method, an osmotic pressure assisted reverse osmosis method, an evaporation method, an electrodialysis method, a combination thereof, and the like. The adsorbent method is not only insufficient in concentration, but also generates extra waste in the adsorption and desorption process. Nanofiltration has the defects of high cost and easy blockage. The reverse osmosis method has the problems of limited concentration, high requirement on equipment pressure resistance grade and high energy consumption. The evaporation method has very high energy consumption and large occupied area. The electrodialysis method has the advantages of limited concentration, higher energy consumption, extremely high pretreatment requirement on stock solution and low application range. These methods generally have the problem that it is difficult to combine high concentration with low cost. In recent years, an osmotic pressure assisted reverse osmosis technology based on concentrate reflux has emerged. For example, CN201346446Y discloses a low operating pressure reverse osmosis device, which comprises a high pressure pump and a reverse osmosis device formed by reverse osmosis devices connected in a pipeline sequence, wherein reverse osmosis membrane components in the reverse osmosis devices are arranged in a single Duan Binglian type arrangement, and meanwhile, a concentrate return pipe is led out from a concentrate discharge pipe of the reverse osmosis devices to the front of the high pressure pump, and a regulating valve is arranged on the concentrate return pipe. The device adopts the combination of single-section parallel arrangement of reverse osmosis membrane components and partial concentrate backflow, thereby effectively reducing the operating pressure of the reverse osmosis device. When the osmotic pressure assisted reverse osmosis technology based on concentrate reflux is used for concentrating target materials in solution, the osmotic pressure assisted reverse osmosis technology has the advantages of relatively higher concentration and relatively lower energy consumption, but because a large amount of concentrate which is concentrated by the osmotic pressure assisted reverse osmosis technology is used as reflux, the membrane flux is lower, the system efficiency is not high, so that the number of required membrane elements is more, and the equipment investment cost is high. Disclosure of utility model Problems to be solved by the utility model As described above, in the prior art, there are general problems that it is difficult to combine high concentration and low cost in the apparatus and method for concentrating a target material in a solution. The osmotic pressure assisted reverse osmosis technology based on concentrate reflux has a problem in that a large number of semipermeable membrane elements must be used to construct an apparatus in order to achieve a relatively high concentration, and thus the apparatus investment cost is high and the occupation of land is large. In addition, although the osmotic pressure assisted reverse osmosis technology based on concentrate reflux reduces the operating pressure relative to the conventional reverse osmosis technology without concentrate membrane internal reflux, a large number of semi-permeable membrane elements must be used in order to achieve a relatively high concentration, and the energy consumption required for applying pressure to the large number of semi-permeable membrane elements is difficult to sufficiently reduce, so there is room for improvement in the operating cost. In response to the foregoing problems of the prior art, the present utility model provides a system and method that reduces the number of semi-permeable membrane elements used and concentrates target materials in solution at low cost and with high efficiency. Solution for solving the problem In view of the above problems, as a result of intensive studies and repeated experiments, it has been found that the above problems can be solved by combining a separation device and a semi-permeable device, separating a solution as a raw liquid into a target liquid having a high target material concentration and a drain liquid having a low target material concentration and a higher osmotic pressure than or equal to the target liquid, and allowing the target liquid and an auxiliary liquid containing the drain liquid to flow through both sides of a semi-permeable membrane in the presence or absence of mechanical pressure, respectively, to concentrate the target liquid. [1] A system for concentrating a target material in a solut