CN216662559U - Electroplate centralized control district high concentration nitrate radical waste water ion exchange processing apparatus - Google Patents
Electroplate centralized control district high concentration nitrate radical waste water ion exchange processing apparatus Download PDFInfo
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- CN216662559U CN216662559U CN202123327930.2U CN202123327930U CN216662559U CN 216662559 U CN216662559 U CN 216662559U CN 202123327930 U CN202123327930 U CN 202123327930U CN 216662559 U CN216662559 U CN 216662559U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model relates to an ion exchange treatment device for high-concentration nitrate radical wastewater in an electroplating centralized control area, which is characterized in that: the method is characterized in that: the resin regeneration system includes: the rotating unit and the two birth systems unit are either three-dimensional or connected in series. The method can effectively solve the problem of high-concentration total nitrogen, and simultaneously ensures that the total nitrogen index stably meets the requirement of municipal pipe network storage.
Description
Technical Field
The utility model relates to an ion exchange treatment device for high-concentration nitrate radical wastewater in an electroplating centralized control area, belonging to the field of sewage treatment.
Background
The surface plating treatment of relevant products in industries such as shoes, clothes, automobile parts, bathrooms, living appliances, electronic circuits, mechanical manufacturing and the like. In the existing ten-water split-flow quality-divided comprehensive wastewater, the electroplating wastewater treatment is always troubled by the problem of high-concentration total nitrogen because electroplating enterprises use a large amount of nitric acid in the processes of rack removal, rainbow chemical discharge and the like. Because the electroplating wastewater has large salt content and poor biodegradability, a new process mode is required to be adopted for denitrification treatment.
In recent years, due to the vigorous development of the electroplating process, various electroplating enterprises in the electroplating park adopt a clean production mode to develop circular economy and save water resources, so that the total nitrogen concentration of nitrate radical in the comprehensively discharged wastewater reaches 700-.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an ion exchange treatment device for high-concentration nitrate radical wastewater in an electroplating centralized control area, which can effectively solve the problem of high-concentration total nitrogen and ensure that the total nitrogen index stably meets the requirement of municipal pipe networks.
The utility model aims to realize the purpose, and the device for treating the high-concentration nitrate radical wastewater in the electroplating centralized control area is characterized in that: the resin regeneration system includes: the rotating unit and the two birth systems unit are either three-dimensional or connected in series.
The said transfer unit includes: the device comprises a rotary container (1), adsorption regeneration resin (2), rotary liquid (3), a rotary liquid suction pump (4), a rotary liquid injection pipe (5), a rotary liquid injection hole (6), a rotary liquid discharge pump (7), a rotary liquid discharge timing valve (8) and a rotary liquid discharge port (9), wherein the adsorption regeneration resin (2) is placed in the rotary container (1), and the bottom of the rotary container (1) is communicated with an input port of the rotary liquid discharge pump (7) through the rotary liquid discharge port (9); the top of the rotary container (1) is connected with the outlet of a rotary liquid injection pipe (5) and a rotary liquid suction pump (4) in sequence through a rotary liquid injection hole (6), and the inlet of the rotary liquid suction pump (4) is connected with the rotary liquid (3) through a pipeline.
The regeneration unit and the transformation unit basically adopt the same structure and comprise: the device comprises a regeneration container (10), adsorption regeneration resin (2), regeneration liquid (11), a regeneration liquid injection pump (12), a regeneration liquid injection pipe (13), a regeneration liquid injection hole (14), a regeneration liquid drainage pool (15), a regeneration liquid drainage valve (16) and a regeneration liquid drainage port (17), wherein the adsorption regeneration resin (2) is placed in a rotary container (1), and the bottom of the rotary container (1) is communicated with an input port of a rotary liquid drainage pump (7) through a rotary liquid drainage port (9); the top of the rotary container (1) is sequentially connected with a regeneration liquid injection pipe (13) and an outlet of a regeneration liquid injection pump (12) through a regeneration liquid injection hole (14), and an inlet of the regeneration liquid injection pump (12) is connected with a regeneration liquid (11) pipeline.
The rotary container (1) or the regeneration container (10) has the same structure, the bottom of the rotary container (1) or the regeneration container (10) is provided with a concave table and a liquid outlet, the concave table and the liquid outlet are located on a replacing table top (18) and a boss interface (19), the replacing table top (18) is used for supporting the rotary container (1) or the regeneration container (10), and the boss interface (19) is butted with a rotary liquid outlet (9) or a regeneration liquid outlet (17) of the rotary container (1) or the regeneration container (10).
The transformation liquid injection pipe (5) and the regeneration liquid injection pipe (13) are flexible pipes, and the flexible pipes and the transformation liquid injection holes (6) or the regeneration liquid injection holes (14) of the regeneration container (10) and the transformation container (1) adopt an inserted sealing opening structure.
The plug-in sealing port structure adopts a structure of an oil filling gun.
The utility model has the advantages that: due to the characteristics according to the high concentration of nitrate radical wastewater ions, especially the raw water comprises: the anion being NO3 -、SO4 2-、Cl-The cation is H+、Cu2+、Ni2+Wherein the order of the adsorption of the strong basic anion resin to the inorganic acid radical is as follows: SO (SO)4 2-> NO3 - >Cl- > HCO3 － > OH－The method has the characteristics that experiments are carried out in a targeted manner, the problem that high-concentration nitrate radical wastewater ions adsorbed by resin are effectively solved, the resin adsorption and resin regeneration form a process of a whole process through resin regeneration, the cost is greatly reduced, an industry is formed, the surface plating treatment is carried out on related products in industries such as shoes, clothes, automobile accessories, bathrooms, living appliances, electronic circuits, mechanical manufacturing and the like, and the total nitrogen index is ensured to stably meet the requirement of municipal pipe network storage.
Drawings
The utility model is further illustrated by the following examples, experiments and figures and tables of the specification:
FIG. 1 is a schematic diagram of a switchback exchange;
FIG. 2 is a schematic diagram of a regenerative exchange;
FIG. 3 is a schematic diagram of a switching divert vessel and a regeneration vessel;
FIG. 4 is a comparison of the effect of 5% NaCl and 5% NaOH regeneration solutions;
FIG. 5 is a comparison of the effect of 5% NaOH regenerated solution adsorbing raw water and the effect of raw water after flocculation precipitation;
FIG. 6 is a comparison of the effects of ion exchange resin adsorption of integrated wastewater and nitric acid desulfurization water;
FIG. 7 is a comparison of the effect of the distilled water of sulfate radical adsorbed by nitrate radical resin and the effect of the desulfurized water of nitric acid.
In the figure, 1, a container is turned; 2. adsorbing the regenerated resin; 3. transforming liquid; 4. a shape-changing liquid suction pump; 5. a transformation liquid injection tube; 6. a transfer fluid injection hole; 7. a transformation liquid discharge pump; 8. a reforming liquid discharge timing valve; 9. a transfer liquid discharge port; 10. a regeneration vessel; 11. a regeneration liquid; 12. a regeneration liquid injection pump; 13. a regenerated liquid injection pipe; 14. a regeneration liquid injection hole; 15. a regenerated liquid drainage pool; 16. a regenerated liquid drain valve; 17. a regenerated liquid outlet; 18. replacing the table top; 19. a boss interface; 20. and a liquid discharge pipe.
Detailed Description
An ion exchange treatment method for high-concentration nitrate radical wastewater in an electroplating centralized control area at least comprises the following steps:
1) selecting raw water parameters;
2) comparing the ion exchange schemes of the nitrate radical wastewater;
3) giving nitrate radical wastewater ion exchange;
4) designing a resin regeneration system according to the optimal scheme;
5) resin absorbed by high-concentration nitrate radical wastewater is put into a transfer container 1;
6) starting resin transformation exchange;
7) transferring the resin absorbed by the high-concentration nitrate wastewater by using 5% NaCl;
8) switching the transfer resin to the regenerated resin;
9) carrying out secondary treatment on the resin adsorbed by the high-concentration nitrate wastewater by using 5% NaOH;
10) detecting whether the resin adsorbed by the high-concentration nitrate radical wastewater reaches the standard, and repeating the step 7) if the resin does not reach the standard; when the resin reaches the standard, closing a resin regeneration system;
11) and taking out the regenerated resin for later use.
The raw water parameters are as follows: at least comprises the following steps: the anion being NO3 -、SO4 2-、Cl-The cation is H+、Cu2+、Ni2+Wherein the order of the adsorption of the strong basic anion resin to the inorganic acid radical is as follows: SO (SO)4 2-> NO3 - >Cl- > HCO3 － > OH－。
The resin regeneration system includes: the shape-changing unit and the two birth systems unit are either separated or connected in series, and the shape-changing unit comprises: the said transfer unit includes: the device comprises a rotary container 1, adsorption regeneration resin 2, rotary liquid 3, a rotary liquid suction pump 4, a rotary liquid injection pipe 5, a rotary liquid injection hole 6, a rotary liquid discharge pump 7, a rotary liquid discharge timing valve 8 and a rotary liquid discharge port 9, wherein the adsorption regeneration resin 2 is placed in the rotary container 1, and the bottom of the rotary container 1 is communicated with an input port of the rotary liquid discharge pump 7 through the rotary liquid discharge port 9; a transformation liquid injection pipe 5 and an outlet of a transformation liquid suction pump 4 are sequentially connected with the top of the transformation container 1 through a transformation liquid injection hole 6, and an inlet of the transformation liquid suction pump 4 is connected with a transformation liquid 3 pipeline; when the device works, the transfer liquid 3 is injected into the transfer container 1 from the transfer liquid injection hole 6 through the transfer liquid suction pump 4 to adsorb the regenerated resin 2; and (3) performing a replacement reaction on the regenerated resin 2 and the transfer liquid 3 to ensure that the regenerated resin 2 is firstly transferred, after 30 minutes to 1 hour of transfer, absorbing the transfer liquid 3 to a transfer liquid discharge pool 8 by a transfer liquid discharge pump 8, then closing the system, and separating the adsorption regenerated resin 2 to a regeneration unit again.
The regeneration unit and the transformation unit basically adopt the same structure and comprise: the device comprises a rotating container 10, adsorption regeneration resin 2, regeneration liquid 11, a regeneration liquid injection pump 12, a regeneration liquid injection pipe 13, a regeneration liquid injection hole 14, a regeneration liquid drainage pool 15, a regeneration liquid drainage valve 16 and a regeneration liquid drainage port 17, wherein the adsorption regeneration resin 2 is placed in the rotating container 1, and the bottom of the rotating container 1 is communicated with an input port of a rotating liquid drainage pump 7 through a rotating liquid drainage port 9; the top of the rotary container 1 is sequentially connected with a regeneration liquid injection pipe 13 and an outlet of a regeneration liquid injection pump 12 through a regeneration liquid injection hole 14, and an inlet of the regeneration liquid injection pump 12 is connected with a regeneration liquid 11 pipeline; in operation, the regeneration liquid 11 is injected into the adsorption regeneration resin 2 in the transfer container 1 through a regeneration liquid injection hole 14 by a regeneration liquid injection pump 12; and (3) carrying out replacement reaction on the regenerated resin 2 and the regenerated liquid 11 to regenerate the regenerated resin 2 again, and reusing the regenerated resin 2 in the high-concentration nitrate wastewater adsorption after 30 minutes to 1 hour of regeneration is finished.
As shown in fig. 3, the turning container 1 or the turning container 10 has the same structure, and the bottom is provided with a concave table and a liquid outlet, the concave table and the liquid outlet are located on a replacing table 18 and a boss interface 19, the replacing table 18 is used for supporting the turning container 1 or the turning container 10, and the boss interface 19 is butted with the turning liquid discharge port 9 or the regeneration liquid discharge port 17 of the turning container 1 or the turning container 10.
The transformation liquid injection pipe 5 and the regeneration liquid injection pipe 13 are flexible pipes, and the flexible pipes and the transformation container 10 and the transformation liquid injection holes 6 or the regeneration liquid injection holes 14 of the transformation container 1 adopt an insertion sealing port structure. The structure of the plug-in sealing port adopts the structure of an oil filling gun.
In the present invention, the comparative nitrate wastewater ion exchange protocol includes:
determining the test raw water as the electroplating collectionControlling area comprehensive waste water, wherein the main anion in the waste water is NO3 -、SO4 2-、Cl-Etc., the main cation is H+、Cu2+、Ni2+And the like. Wherein the adsorption order of the strong basic anion resin to the inorganic acid radical is as follows: SO4 2-> NO3 - >Cl- > HCO3 － > OH－；
Regeneration resin experiment with 5% NaCl and 5% NaOH separately
The raw water was saturated by adsorption on an anion resin, and then was regenerated with 5% NaCl and 5% NaOH solutions, respectively, and the experimental results are shown in table 1, table 2 and fig. 1.
TABLE 15% NaCl regenerated resin experiment for adsorption of nitrate radical effect
TABLE 25% NaOH regenerated resin experiment for adsorbing nitrate radical effect
Effect comparison of 5% NaCl and 5% NaOH regenerated solution
Based on the results of the experiments in tables 1 and 2, the effect comparison between the 5% NaCl and 5% NaOH regeneration solutions is shown in FIG. 4.
As can be seen from FIG. 4, the optimum time of the adsorption effect of the two regeneration liquids is 1h, and after 1h, the resin is saturated, and the adsorption effect is poor; the analysis is basically completed after 3h of 5% NaCl and 5% NaOH solution. When 5% NaOH is used for regeneration, OH in NaOH solution-The displacement of the ion exchange resin to generate precipitate to block the ion exchange resin is not feasible in practical application.
Experiment of regenerated resin with pretreated 5% NaOH
Due to Cu in the wastewater2+、Ni2+The metal ion concentration is higher, and OH is adsorbed when the resin is regenerated-The pH value rises, and precipitation occurs. Cu in the wastewater can be removed by flocculation precipitation pretreatment2+、Ni2+The metal ion of (1).
TABLE 3 Experimental effect of resin adsorption after flocculation and precipitation of raw water
From the test results in fig. 2, it is found that the regenerated resin after flocculation pretreatment is no longer blocked, but the effect is still poor and the pretreatment cost is increased, and 5% NaCl should be selected by comparing the regenerated liquid.
In view of the above experiment, the resin adsorbs nitrate in the comprehensive wastewater and is in a saturated state after 1-2 hours. According to the adsorption order of the anion exchange resin, the resin preferentially adsorbs SO4 2-Limit NO3 -And (4) adsorbing. The results of the desulfurization of water with nitric acid are shown in Table 4.
TABLE 4 nitric acid desulfurization water sample experiment
The effect of the resin adsorption comprehensive wastewater is compared with that of nitric acid desulfurization water
According to the experimental results of tables 3 and 4, the effect comparison between the comprehensive wastewater of resin adsorption and the desulfurized water of nitric acid is shown in FIG. 6.
As can be seen from FIG. 6, the effect of the ion exchange resin adsorption is obviously superior to that of nitric acid desulfurization water, the effective adsorption time reaches 6h, and the requirement of one production shift in practice can be met. The adsorption rate of the experiment in 1-6h reaches 96.2%, the adsorption effect is stable, and the ion exchange resin has good application value in desulfurization comprehensive wastewater.
The series experiment shows that the ion exchange resin has good effect of adsorbing nitric acid desulfurization water, and the series experiment is adopted for further comprehensively treating comprehensive wastewater. The front end is provided with common anion exchange resin to absorb sulfate radicals in the comprehensive wastewater, the distillate P is collected, and the rear end is connected with nitrate radical resin in series to absorb nitrate radicals. The results of the experiment are shown in Table 5.
TABLE 5 common anionic resin removalSO4 2-Experimental water sample experimental results
Dilution experiments
According to the practical problem of the resin for adsorbing sulfate radicals, the front-end resin adopts nitrate ion exchange resin, and the concentration of the wastewater is diluted to about 1000mg/L, so that the effect of the wastewater is optimal. The results of the experiment are shown in Table 6.
TABLE 6 Experimental results of desulfurized water from nitrate ion exchange resin
The experimental result in table 6 shows that the adsorption effect of total nitrogen is good after 1-3 h, the concentration of total nitrogen rises sharply after 4h, the analytic regeneration effect is good, and the application value is high.
Adsorption of SO by nitrate radical resin4 2-Comparing the effect of distilled water with that of nitric acid desulfurized water
Adsorption of SO by nitrate radical resin4 2-The effect of distilled water and nitric acid desulfurized water is compared as shown in FIG. 5.
As can be seen from FIG. 7, the nitric acid desulfurization wastewater has a good adsorption effect within 1-6h, and the TN concentration is below 100 mg/L; the nitrate radical resin has good absorption effect on sulfate radical distillate within 1-3 h. According to the actual water inlet condition of production, nitrate radicals can be effectively adsorbed and analyzed, and the problem of high-concentration total nitrogen is solved.
Sulfate radicals and nitrate radicals are respectively adsorbed through a series resin experiment, the TN content in the resin effluent at the tail end can reach below 100mg/L within the first 6 hours, the adsorption and regeneration effects are good, the requirements of experiments and production total nitrogen indexes can be met, the operation risk is reduced, the fine management and cost reduction and efficiency improvement effects are obvious, and the method has good practical engineering and production guidance significance.
Within 10 minutes before water enters, the resin adsorption effect is not obvious, and the color of the discharged water is close to that of the raw water. After 4h of adsorption test, regenerating by using 4% NaOH, wherein the effluent is yellow, the resin turns from orange to light brown after 30-1 h; the effluent was colorless after regeneration with 4% HCl and the resin turned beige. The resin has strong oxidation resistance and has the adsorption and regeneration requirements.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (6)
1. The utility model provides an electroplate high concentration nitrate radical waste water ion exchange processing apparatus in centralized control district, characterized by: the resin regeneration system includes: the rotating unit and the two birth systems unit are either three-dimensional or connected in series.
2. The ion exchange treatment device for the high-concentration nitrate wastewater in the electroplating centralized control area as claimed in claim 1, which is characterized in that: the said transfer unit includes: the device comprises a rotary container (1), adsorption regeneration resin (2), rotary liquid (3), a rotary liquid suction pump (4), a rotary liquid injection pipe (5), a rotary liquid injection hole (6), a rotary liquid discharge pump (7), a rotary liquid discharge timing valve (8) and a rotary liquid discharge port (9), wherein the adsorption regeneration resin (2) is placed in the rotary container (1), and the bottom of the rotary container (1) is communicated with an input port of the rotary liquid discharge pump (7) through the rotary liquid discharge port (9); the top of the reforming container (1) is sequentially connected with a reforming liquid injection pipe (5) and an outlet of a reforming liquid suction pump (4) through a reforming liquid injection hole (6), and an inlet of the reforming liquid suction pump (4) is connected with a reforming liquid (3) pipeline; when the device works, the transfer liquid (3) is injected into the transfer container (1) from the transfer liquid injection hole (6) through the transfer liquid suction pump (4) to adsorb the regenerated resin (2); and (3) performing a replacement reaction on the adsorption regeneration resin (2) and the transfer liquid (3), firstly, transferring the adsorption regeneration resin (2), transferring the adsorption regeneration resin for 30 minutes to 1 hour, absorbing the transfer liquid (3) to a transfer liquid discharge timing valve (8) by a transfer liquid discharge pump (7), then closing the system, and re-distributing the adsorption regeneration resin (2) to a regeneration unit.
3. The ion exchange treatment device for the high-concentration nitrate wastewater in the electroplating centralized control area as claimed in claim 2, which is characterized in that: the regeneration unit and the transformation unit basically adopt the same structure and comprise: the device comprises a regeneration container (10), adsorption regeneration resin (2), regeneration liquid (11), a regeneration liquid injection pump (12), a regeneration liquid injection pipe (13), a regeneration liquid injection hole (14), a regeneration liquid drainage pool (15), a regeneration liquid drainage valve (16) and a regeneration liquid drainage port (17), wherein the adsorption regeneration resin (2) is placed in a rotary container (1), and the bottom of the rotary container (1) is communicated with an input port of a rotary liquid drainage pump (7) through a rotary liquid drainage port (9); the top of the rotary container (1) is sequentially connected with a regeneration liquid injection pipe (13) and an outlet of a regeneration liquid injection pump (12) through a regeneration liquid injection hole (14), and an inlet of the regeneration liquid injection pump (12) is connected with a regeneration liquid (11) pipeline; when the adsorption regeneration resin regeneration device works, a regeneration liquid (11) is injected into the adsorption regeneration resin (2) in the rotary container (1) through a regeneration liquid injection hole (14) by a regeneration liquid injection pump (12); and (3) carrying out replacement reaction on the adsorption regeneration resin (2) and the regeneration liquid (11) to regenerate the adsorption regeneration resin (2), and reusing the adsorption regeneration resin (2) to adsorb the high-concentration nitrate wastewater after the regeneration is finished for 30 minutes to 1 hour.
4. The ion exchange treatment device for the high-concentration nitrate wastewater in the electroplating centralized control area as claimed in claim 3, which is characterized in that: the rotary container (1) or the regeneration container (10) has the same structure, the bottom of the rotary container (1) or the regeneration container (10) is provided with a concave table and a liquid outlet, the concave table and the liquid outlet are located on a replacing table top (18) and a boss interface (19), the replacing table top (18) is used for supporting the rotary container (1) or the regeneration container (10), and the boss interface (19) is butted with a rotary liquid outlet (9) or a regeneration liquid outlet (17) of the rotary container (1) or the regeneration container (10).
5. The ion exchange treatment device for the high-concentration nitrate wastewater in the electroplating centralized control area as claimed in claim 4, which is characterized in that: the transformation liquid injection pipe (5) and the regeneration liquid injection pipe (13) are flexible pipes, and the flexible pipes and the transformation liquid injection holes (6) or the regeneration liquid injection holes (14) of the regeneration container (10) and the transformation container (1) adopt an inserted sealing opening structure.
6. The ion exchange treatment device for the high-concentration nitrate wastewater in the electroplating centralized control area as claimed in claim 5, which is characterized in that: the plug-in sealing port structure adopts a structure of an oil filling gun.
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| CN114212857A (en) * | 2021-12-28 | 2022-03-22 | 中国启源工程设计研究院有限公司 | Ion exchange treatment device and method for high-concentration nitrate radical wastewater in electroplating centralized control area |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114212857A (en) * | 2021-12-28 | 2022-03-22 | 中国启源工程设计研究院有限公司 | Ion exchange treatment device and method for high-concentration nitrate radical wastewater in electroplating centralized control area |
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