Ion exchange resin regeneration liquid recycling system

Abstract

The utility model relates to an ion exchange resin regeneration liquid recycling system, which comprises an alkali liquor tank, a pump, a one-way valve, a controller, ion exchange resin, a recovery tank, a sodium ion concentration monitor, a calcium ion concentration monitor, a drain valve, a stirring paddle, a leaching pipe and a recovery pipe, the recovery tank is provided with a sodium ion concentration monitor, a calcium ion concentration monitor, the leaching pipe and the recovery pipe are respectively connected with the ion exchange resin, and the drain valve is positioned at the bottom of the recovery tank. According to the utility model, the sodium ion concentration of wastewater in the recovery tank is detected, and the controller controls alkali liquor added into the recovery tank by the pump according to the sodium ion concentration, so that the accurate control on the added medicament is realized, meanwhile, the calcium ion concentration of the wastewater in the recovery tank is detected, and the wastewater in the recovery tank is emptied when the calcium ion concentration exceeds a set value; the alkali leaching effect is guaranteed, meanwhile, the discharge capacity is reduced, and the recycling efficiency of the regenerated waste liquid of the water system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optimizing the regeneration effect of ion bed resin, in particular to an ion exchange resin regeneration liquid circulation and reuse system. Background Art

[0002] Ion exchange resins are insoluble polymer compounds with active groups capable of exchanging ions. These groups can react with strong acids, strong bases, weak acids, and weak bases, and are widely used in water treatment. The primary function of ion exchange resins is to remove impurity ions from water. They adsorb and remove cations such as calcium, magnesium, and sodium, as well as anions such as chloride and sulfate, thereby softening and desalinating the water and purifying it. After a period of use, ion exchange resins reach saturation with adsorbed impurities, making it difficult to exchange highly active cations such as sodium, magnesium, and calcium. Therefore, regeneration is necessary to remove the adsorbed ions or impurities from the resin and restore its original performance. Resin regeneration can be achieved through acid-base leaching, hydrochloric acid regeneration, or sodium hydroxide regeneration. The wastewater generated by these regeneration processes is called regeneration wastewater. Sodium ions are the most active in the wastewater generated by ion exchange resins after alkaline leaching, making them highly valuable for recycling in the subsequent sodium hydroxide regeneration stage. Aiming at the wastewater discharged directly into the ditch after alkaline leaching during the regeneration process of a sodium-type ion exchange resin, a system for recycling the alkaline regeneration liquid of the ion exchange resin is designed to improve the utilization efficiency of sodium ions and save costs. Utility Model Content

[0003] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an ion exchange resin regeneration liquid circulation and reuse system, including an alkali liquid tank 1, a pump 2, a one-way valve 3, a controller 4, an ion exchange resin 5, a recovery tank 6, a sodium ion concentration monitor 7, a calcium ion concentration monitor 8, a drain valve 9, a stirring paddle 10, a leaching pipe 11, and a recovery pipe 12.

[0004] The alkali liquid tank 1 is connected to the pump 2 through a pipeline, and the pump 2 is connected to the recovery tank 6 through a pipeline. The recovery tank 6 is provided with a sodium ion concentration monitor 7 and a calcium ion concentration monitor 8. The elution pipe 11 and the recovery pipe 12 are respectively connected to the ion exchange resin 5, and the drain valve 9 is located at the bottom of the recovery tank 6.

[0005] The controller 4 is connected to the pump 2 , the sodium ion concentration monitor 7 , the calcium ion concentration monitor 8 , and the drain valve 9 through signal lines.

[0006] Furthermore, the alkali liquid in the alkali liquid tank 1 is a sodium hydroxide solution with a mass concentration of 40%.

[0007] Furthermore, a stirring paddle 10 is provided in the recovery tank 6 .

[0008] Furthermore, a one-way valve 3 is provided on the pipeline connecting the pump 2 and the recovery tank 6 .

[0009] Furthermore, the controller 4 is a programmable logic controller.

[0010] Compared with the existing ion bed, the utility model has the following advantages.

[0011] 1. The utility model provides an ion exchange resin alkali regeneration liquid recycling system, which uses a recovery tank 6 to recycle and reuse the alkali leaching water, saving production water while also reducing sewage discharge and improving the recovery efficiency of the water system regeneration waste liquid.

[0012] 2. The utility model provides an ion exchange resin regeneration liquid recycling system, which uses a sodium ion concentration monitor 7 to detect sodium ions in the wastewater in the recovery tank 6. The controller 4 controls the pump 2 to add alkali solution into the recovery tank 6 according to the sodium ion concentration, thereby achieving precise control of the added reagents. At the same time, a calcium ion concentration monitor 8 is used to detect calcium ions in the wastewater in the recovery tank 6. When the calcium ion concentration exceeds the set value, the wastewater in the recovery tank 6 is emptied. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of an ion exchange resin regeneration liquid recycling system of the utility model. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle", "inside", "top", "bottom end", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, they can mean fixed connection, detachable connection, or integral connection; they can mean mechanical connection or electrical connection; they can mean direct connection, indirect connection through an intermediate medium, or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] The present invention will be described in further detail below with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the utility model is an ion exchange resin regeneration liquid recycling system, which includes an alkali liquid tank 1, a pump 2, a one-way valve 3, a controller 4, an ion exchange resin 5, a recovery tank 6, a sodium ion concentration monitor 7, a calcium ion concentration monitor 8, a drain valve 9, a stirring paddle 10, a leaching pipe 11, and a recovery pipe 12.

[0018] The alkali liquid tank 1 is connected to the pump 2 through a pipeline. The alkali liquid in the alkali liquid tank 1 is a sodium hydroxide solution with a mass concentration of 40%. The pump 2 is connected to the recovery tank 6 through a pipeline. The recovery tank 6 is provided with a sodium ion concentration monitor 7 and a calcium ion concentration monitor 8. The elution pipe 11 and the recovery pipe 12 are respectively connected to the ion exchange resin 5. The drain valve 9 is located at the bottom of the recovery tank 6. A stirring paddle 10 is provided in the recovery tank 6.

[0019] The controller 4 is connected to the pump 2 , the sodium ion concentration monitor 7 , the calcium ion concentration monitor 8 , and the drain valve 9 through signal lines. The controller 4 is a programmable logic controller.

[0020] The working process of the utility model is as follows: when the ion exchange resin 5 needs to be backwashed, the sodium hydroxide alkali solution with a mass concentration of 30% in the recovery tank 6 is sent into the ion exchange resin 5 through the elution pipe 11 for alkali elution to replace hydrogen ions, and the elution liquid is returned to the recovery tank 6 through the recovery pipe 12. As the alkali elution continues, the sodium ion concentration in the recovery tank 6 continues to decrease, and the calcium ion concentration continues to increase. When the calcium ion concentration is lower than the set value, the controller 4 controls the pump 2 to pump the sodium hydroxide alkali solution with a mass concentration of 40% into the recovery tank 6 and stirs it evenly through the stirring paddle 10. The pumping is stopped after the sodium ion concentration reaches the set value. Once the calcium ion concentration in the alkali elution wastewater exceeds the set value, the controller 4 controls the drain valve 9 to drain the alkali elution wastewater in the recovery tank 6, and uses the pump 2 to re-pump the alkali elution solution.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0022] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An ion exchange resin regeneration liquid recycling system, comprising an alkali liquid tank (1), a pump (2), a one-way valve (3), a controller (4), an ion exchange resin (5), a recovery tank (6), a sodium ion concentration monitor (7), a calcium ion concentration monitor (8), a drain valve (9), a stirring paddle (10), a leaching pipe (11), and a recovery pipe (12), characterized in that The alkali liquid tank (1) is connected to the pump (2) through a pipeline, the pump (2) is connected to the recovery tank (6) through a pipeline, the recovery tank (6) is provided with a sodium ion concentration monitor (7) and a calcium ion concentration monitor (8), the elution pipe (11) and the recovery pipe (12) are respectively connected to the ion exchange resin (5), the drain valve (9) is located at the bottom of the recovery tank (6), and the controller (4) is respectively connected to the pump (2), the sodium ion concentration monitor (7), the calcium ion concentration monitor (8), and the drain valve (9) through signal lines.

2. The ion exchange resin regeneration liquid recycling system according to claim 1, characterized in that The alkali solution in the alkali solution tank (1) is a sodium hydroxide solution with a mass concentration of 40%.

3. The ion exchange resin regeneration liquid recycling system according to claim 1, characterized in that A stirring paddle (10) is provided in the recovery tank (6).

4. The ion exchange resin regeneration liquid recycling system according to claim 1, characterized in that A one-way valve (3) is provided on the pipeline connecting the pump (2) and the recovery tank (6).

5. The ion exchange resin regeneration liquid recycling system according to claim 1, characterized in that The controller (4) is a programmable logic controller.

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