Resin tower regeneration wastewater automatic neutralization and utilization device

Abstract

The utility model relates to an automatic neutralization and utilization device for regenerated wastewater of a resin tower, which comprises a regeneration tank comprising a tank body, a mixing cavity and a spray pipe; the dispersing block is arranged in the tank body; the inner container comprises a cylindrical block, a central groove and an annular groove, and the annular groove communicates with the mixing cavity through a material conveying pipe and an electromagnetic valve; the top cover is arranged at the top end of the regeneration tank and is respectively communicated with the central groove and the annular groove through a central feeding pipe and an outer ring feeding pipe; and the threaded plugging block is arranged in the mixing cavity. According to the utility model, the regeneration tank, the inner container and other components are arranged, and the regeneration tank is matched with the mixing cavity and the spray pipe, so that waste liquid in the annular groove can enter the mixing cavity through the material conveying pipe and is sprayed out from the spray pipe, and waste liquid in the central groove directly flows into the regeneration tank from the liquid outlet pipe; at the moment, the waste liquid sprayed out of the spray pipe is mixed with the waste liquid flowing out of the liquid outlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of resin tower regeneration wastewater reuse, in particular to an automatic neutralization and utilization device for resin tower regeneration wastewater. Background Technique

[0002] In the ion-exchange membrane caustic soda production process, primary brine passes through a resin tower, and the chelating resin's adsorption effect is utilized to achieve secondary refining. During this process, the primary brine removes a small amount of divalent metal ions (such as Ca2+, Mg2+, Sr2+, etc.) existing in the brine through the chelating resin to obtain secondary brine that meets the production requirements of the electrolytic cell.

[0003] After the resin tower adsorbs for a period of time, hydrochloric acid and caustic soda are respectively used to regenerate and restore the resin that has lost its adsorption effect to its adsorption effect on divalent metal ions. During the resin tower regeneration process, it automatically operates according to steps such as water washing I, acid washing, water washing II, alkali washing, water washing III, and filling brine. During the regeneration process, a large amount of acidic and alkaline wastewater containing salt is generated respectively. Currently, the traditional practice in the chlor-alkali industry for treating these wastewaters is to discharge the acidic and alkaline wastewaters into the regeneration wastewater tank one after another. After acid-base neutralization, it is transported to the primary brine process for salt dissolution.

[0004] The above method directly discharges the acid-base wastewater into the regeneration wastewater tank for neutralization reaction. In this process, it takes a long time for the acid-base wastewater to be completely mixed evenly, resulting in a long neutralization reaction time. Since the acid-base wastewater has strong corrosiveness, the cost of mixing by stirring is too high, and solution leakage is also likely to occur during the stirring process, so it is not very suitable. Therefore, an automatic neutralization and utilization device for resin tower regeneration wastewater is proposed to solve the above problems. Content of the Utility Model

[0005] Based on the above description, the utility model provides an automatic neutralization and utilization device for resin tower regeneration wastewater to solve the problem of low mixing efficiency of acid-base wastewater in the existing wastewater regeneration tank.

[0006] The technical solution for the utility model to solve the above technical problems is as follows: An automatic neutralization and utilization device for resin tower regeneration wastewater includes: a regeneration tank, the regeneration tank includes a tank body, a mixing chamber, and a spray pipe. A dispersion block is arranged inside the tank body, and an inner tank is arranged inside the tank body and is located above the dispersion block, and includes a cylindrical block, a central groove, and an annular groove. The annular groove is interconnected with the mixing chamber through a feed pipe and an electromagnetic valve. A top cover is arranged at the top of the regeneration tank and is interconnected with the central groove and the annular groove through a central feed pipe and an outer ring feed pipe respectively. A threaded plug block is arranged inside the mixing chamber.

[0007] On the basis of the above technical solutions, the present utility model can also be improved as follows.

[0008] Further, a placement ring is provided inside the tank body, the inner diameter of the placement ring is smaller than the diameter of the inner tank, and a discharge pipe is provided on the outer surface of the tank body.

[0009] Further, a mixing chamber is provided at the bottom end of the tank body, a spray pipe is provided at the top end of the mixing chamber, and the mixing chamber is communicated with the tank body through the spray pipe.

[0010] Further, the top cover includes a cover body, a central feed pipe and an outer ring feed pipe are provided at the top end of the cover body, and an outer ring blocking block and an inner ring blocking block are provided at the bottom end of the cover body.

[0011] Further, the inner tank includes a cylindrical block, a central groove and an annular groove are provided on the upper surface of the cylindrical block, the central feed pipe is communicated with the central groove, and the inner ring blocking block extends into the central groove.

[0012] Further, a liquid outlet pipe is provided at the bottom end of the cylindrical block, and the liquid outlet pipe is communicated with the central groove.

[0013] Further, the annular groove is communicated with the outer ring feed pipe, the outer ring blocking block extends into the annular groove, and the annular groove is communicated with the mixing chamber through a feed pipe and an electromagnetic valve.

[0014] Further, the dispersion block includes a block body, and the block body is arranged inside the tank body through a connecting rod.

[0015] Further, the diameters of the upper and lower ends of the block body are smaller than the diameter of the middle part thereof, and the block body is arranged between the liquid outlet pipe and the spray pipe.

[0016] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0017] 1. By providing components such as a regeneration tank and an inner tank, and through the cooperation relationship between the regeneration tank, the mixing chamber and the spray pipe, the waste liquid in the annular groove can enter the mixing chamber through the feed pipe and the electromagnetic valve and be sprayed out from the spray pipe, while the waste liquid in the central groove directly flows into the regeneration tank from the liquid outlet pipe. At this time, the waste liquid sprayed out from the spray pipe and the waste liquid flowing out from the liquid outlet pipe are mixed;

[0018] 2. By providing the dispersion block, the effect of dispersing the waste liquid is achieved. When the waste liquid flows out from the spray pipe and the liquid outlet pipe, the waste liquid impacts on the upper and lower surfaces of the block body respectively. After being impacted, the waste liquid spreads out. Since the waste liquid sprayed out from the spray pipe is upward and the waste liquid flowing out from the liquid outlet pipe is downward, and the two waste liquid directions are opposite, they can be fully contacted after spreading out. Brief Description of the Drawings

[0019] Figure 1 FIG. 1 is a schematic structural view of an automatic neutralization and utilization device for regenerated wastewater of a resin tower provided by an embodiment of the present utility model;

[0020] Figure 2 FIG. 2 Figure 1 is a structural sectional view of FIG. 2;

[0021] Figure 3 FIG. 3 Figure 2 is a schematic structural view of another perspective of FIG. 3;

[0022] Figure 4 FIG. 4 is a schematic structural view of a top cover in an embodiment of the present utility model;

[0023] Figure 5 FIG. 5 Figure 4 is a schematic structural view of another perspective of FIG. 5;

[0024] Figure 6 FIG. 6 is a schematic structural view of an inner tank in an embodiment of the present utility model;

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. regeneration tank; 11. tank body; 12. placement ring; 13. mixing chamber; 14. spray pipe; 2. discharge pipe; 3. top cover; 31. cover body; 32. central feed pipe; 33. outer ring feed pipe; 34. outer ring plugging block; 35. inner ring plugging block; 4. inner tank; 41. cylindrical block; 42. central groove; 43. annular groove; 44. feed pipe; 45. electromagnetic valve; 46. liquid discharge pipe; 5. threaded plugging block; 6. dispersion block; 61. block body; 62. connecting rod. Detailed Embodiments

[0027] For ease of understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is thorough and complete.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0029] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include" or "has" etc. specify the presence of the stated features, integers, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof.

[0030] Please refer to Figures 1 - 3 , an automatic neutralization and utilization device for the regenerated wastewater of a resin tower, comprising:

[0031] A regeneration tank 1, which includes a tank body 11, a mixing chamber 13 and a spray pipe 14. An inner placement ring 12 is arranged inside the tank body 11. The inner diameter of the placement ring 12 is smaller than the diameter of the inner tank 4. A discharge pipe 2 is arranged on the outer surface of the tank body 11. A mixing chamber 13 is arranged at the bottom end of the tank body 11. A spray pipe 14 is arranged at the top end of the mixing chamber 13. The mixing chamber 13 is communicated with the tank body 11 through the spray pipe 14;

[0032] A dispersion block 6, which is arranged inside the tank body 11. The dispersion block 6 includes a block body 61. The block body 61 is arranged inside the tank body 11 through a connecting rod 62. The diameters of the upper and lower ends of the block body 61 are smaller than the diameter of its middle part. The block body 61 is arranged between the liquid outlet pipe 46 and the spray pipe 14;

[0033] Based on the above, the regeneration tank 1 plays a role in providing a mixing space, enabling the acid-base wastewater to undergo a neutralization reaction in the regeneration tank 1. The placement ring 12 plays a role in supporting the inner tank 4, and the mixing chamber 13 plays a role in alleviating the impact force when the wastewater is introduced, avoiding the problem of reducing the service life of the equipment caused by the collision and impact of the wastewater introduced from different directions. The spray pipe 14 enables the wastewater in the mixing chamber 13 to be sprayed out from the spray pipe 14 to form a water column. After the water column impacts on the surface of the dispersion block 6, the water column spreads out to form an umbrella-shaped water surface.

[0034] As Figure 2 , Figure 3 and Figure 6 shown, an inner tank 4, which is arranged inside the tank body 11 and above the dispersion block 6, and includes a cylindrical block 41, a central groove 42 and an annular groove 43. Among them,

[0035] The inner tank 4 includes a cylindrical block 41. A central groove 42 and an annular groove 43 are provided on the upper surface of the cylindrical block 41. The central feed pipe 32 communicates with the central groove 42. The inner ring plugging block 35 extends into the interior of the central groove 42. The annular groove 43 communicates with the mixing chamber 13 through a feed pipe 44 and an electromagnetic valve 45. A liquid outlet pipe 46 is provided at the bottom end of the cylindrical block 41, and the liquid outlet pipe 46 communicates with the central groove 42;

[0036] Based on the above, the settings of the central groove 42 and the annular groove 43 serve to store different wastewaters. Since the pickling and caustic washing times are inconsistent during the resin tower regeneration process, the wastewaters introduced at different times are stored in different positions respectively. The feed pipe 44 and the electromagnetic valve 45 cooperate with each other to control the liquid in the annular groove 43. When the electromagnetic valve 45 is opened, the wastewater in the annular groove 43 can enter the interior of the mixing chamber 13 through the feed pipe 44. The central groove 42 and the liquid outlet pipe 46 cooperate with each other, enabling the wastewater introduced into the central groove 42 to be directly discharged from the liquid outlet pipe 46.

[0037] As Figures 1 - 5 shown, the top cover 3 is provided at the top end of the regeneration tank 1 and communicates with the central groove 42 and the annular groove 43 through the central feed pipe 32 and the outer ring feed pipe 33 respectively. The top cover 3 includes a cover body 31. A central feed pipe 32 and an outer ring feed pipe 33 are provided at the top end of the cover body 31, and an outer ring plugging block 34 and an inner ring plugging block 35 are provided at the bottom end of the cover body 31;

[0038] The threaded plugging block 5 is provided inside the mixing chamber 13;

[0039] Based on the above, the top cover 3 is connected to the regeneration tank 1 by means of screws and nuts. The central feed pipe 32 and the outer ring feed pipe 33 respectively introduce different wastewaters into the central groove 42 and the annular groove 43. The outer ring plugging block 34 and the inner ring plugging block 35 respectively serve to plug the annular groove 43 and the central groove 42. The threaded plugging block 5 serves to plug the mixing chamber 13.

[0040] During the actual use of this embodiment, the wastewater generated during the pickling process is preferentially introduced into the interior of the annular groove 43, so that the acid wastewater is stored in the annular groove 43, while the caustic wastewater is introduced into the interior of the central groove 42;

[0041] When introducing the caustic wastewater, the electromagnetic valve 45 is energized and opened, enabling the acid wastewater to be sprayed out from the spray pipe 14 after passing through the feed pipe 44, the electromagnetic valve 45, and the mixing chamber 13. The sprayed acid wastewater hits the dispersion block 6 and scatters in an umbrella shape;

[0042] The alkaline wastewater flows out from the liquid outlet pipe 46, and after colliding with the dispersion block 6, it spreads out in an umbrella shape. The dispersed alkaline wastewater and acidic wastewater come into contact and collide with each other, thus achieving the effect of sufficient mixing. Compared with the traditional neutralization device, the regeneration tank 1 makes the acidic wastewater and alkaline wastewater disperse and come into contact with each other after colliding with the dispersion block 6 by utilizing potential energy. During the contact process, it is more uniform and rapid, effectively avoiding the problem of low mixing efficiency between the wastewaters.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A resin tower regeneration wastewater automatic neutralization and utilization device, characterized in that: include: A regeneration tank (1), comprising a tank body (11), a mixing chamber (13) and a nozzle (14); A dispersion block (6) disposed inside the tank body (11); The inner liner (4) is arranged inside the tank body (11) and located above the dispersion block (6), and comprises a cylindrical block (41), a central groove (42) and an annular groove (43), wherein: an annular groove (43) which is in communication with the mixing chamber (13) via a material delivery pipe (44) and an electromagnetic valve (45); A top cover (3) is arranged at the top of the regeneration tank (1) and is connected to the central groove (42) and the annular groove (43) through a central feed pipe (32) and an outer ring feed pipe (33) respectively; A threaded sealing block (5) is arranged inside the mixing chamber (13).

2. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 1 is characterized in that: A placement ring (12) is provided inside the tank body (11), the inner diameter of the placement ring (12) is smaller than the diameter of the inner liner (4), and a discharge pipe (2) is provided on the outer surface of the tank body (11).

3. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 2 is characterized in that: A mixing chamber (13) is arranged at the bottom end of the tank body (11), a nozzle (14) is arranged at the top end of the mixing chamber (13), and the mixing chamber (13) is connected to the tank body (11) through the nozzle (14).

4. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 1 is characterized in that: The top cover (3) comprises a cover body (31), the top end of the cover body (31) is provided with a central feed pipe (32) and an outer ring feed pipe (33), and the bottom end of the cover body (31) is provided with an outer ring blocking block (34) and an inner ring blocking block (35).

5. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 4 is characterized in that: The inner liner (4) comprises a cylindrical block (41), the upper surface of which is provided with a central groove (42) and an annular groove (43), the central feed pipe (32) is connected to the central groove (42), and the inner ring sealing block (35) extends to the interior of the central groove (42).

6. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 5 is characterized in that: A liquid outlet pipe (46) is provided at the bottom end of the cylindrical block (41), and the liquid outlet pipe (46) is communicated with the central groove (42).

7. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 6 is characterized in that: The annular groove (43) is interconnected with the outer ring feed pipe (33), the outer ring blocking block (34) extends to the interior of the annular groove (43), and the annular groove (43) is interconnected with the mixing chamber (13) through the feed pipe (44) and the electromagnetic valve (45).

8. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 6 is characterized in that: The dispersion block (6) comprises a block body (61), and the block body (61) is arranged inside the tank body (11) via a connecting rod (62).

9. The automatic neutralization and utilization device for resin tower regeneration wastewater according to claim 8, characterized in that: The diameters of the upper and lower ends of the block (61) are smaller than the diameter in the middle thereof, and the block (61) is arranged between the liquid outlet pipe (46) and the nozzle (14).

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