CN104355452A - Continuous multistage ion-exchange treatment device for recovering heavy metal ions - Google Patents
Continuous multistage ion-exchange treatment device for recovering heavy metal ions Download PDFInfo
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- CN104355452A CN104355452A CN201410649325.2A CN201410649325A CN104355452A CN 104355452 A CN104355452 A CN 104355452A CN 201410649325 A CN201410649325 A CN 201410649325A CN 104355452 A CN104355452 A CN 104355452A
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- exchange column
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Abstract
The invention discloses a continuous multistage ion-exchange treatment device for recovering heavy metal ions, which comprises a wastewater treatment device and a resin regeneration device, wherein the wastewater treatment device comprises a raw water barrel for storing wastewater; the raw water barrel is communicated with a reaction precipitation tank for recovering silver ion precipitate through a first pipeline which is connected with a first pump; a supernate outlet arranged on the upper part of the reaction precipitation tank is communicated with a water inlet of a pH regulating barrel through a second pipeline; the pH regulating barrel is sequentially connected with a quartz sand column, a trivalent chrome ion-exchange column, a hexavalent chrome ion-exchange column and a mercury ion-exchange column in series; the resin regeneration device comprises an acid dehydration barrel and an alkali washing dehydration barrel; the acid dehydration barrel is communicated with acid inlets on the tops of the trivalent chrome ion-exchange column and mercury ion-exchange column through an acid regeneration pipe which is provided with a sixth pump; and the alkali washing dehydration barrel is communicated with an alkali inlet on the top of the hexavalent chrome ion-exchange column through an alkali regeneration pipe which is provided with a fifth pump. The method can continuously operate, and enhances the treatment efficiency of equipment.
Description
Technical field
The present invention relates to a kind of continuous multi-stage ion-exchange processing device, particularly relating to a kind of continuous multi-stage ion-exchange processing device for reclaiming heavy metal ion.
Background technology
Heavy metal pollution of water body has become one of the most serious environmental problem, and the serious threat of toxic heavy metal to environment just progressively becomes global problem.Exist as miscellaneous toxic heavy metals such as mercury, lead, arsenic, chromium, silver in laboratory waste water, and the wastewater flow rate that environmental classes laboratory produces is large, and all overproof regulation of concentration of the total Cr of inlet of sewer place heavy metal in waste water, total Ag and total Hg, investigation finds these heavy metals mainly from the raffinate that chemical oxygen demand (COD) (COD) testing experiment produces.Heavy metal in waste water content is high, and waste water acidity is stronger.In addition, COD testing experiment is test main in environmental classes laboratory, and the raffinate amount that every day produces can reach 0.5-1L.If the not treated sewer line that directly enters of this part waste water can cause serious harm, as: the corrosion of sewage network; The heavy metal of natural degradation can not enter sewage work, the poisoning even dead of microorganism may be caused, have a strong impact on outlet effect; Enter human body by the cumulative effect of tap water, plant, cause various illnesss etc.In addition, Ag+, Hg2+ in waste water and sexavalent chrome plasma have the value of recovery, and direct discharge can cause the wasting of resources.
In recent years, had and manyly utilized ion exchange method process containing the case of chromium, mercury waste water, ion exchange method be utilize the heavy metal ion in the active group and waste water that contain in ion exchange resin to carry out exchanging, chelating.This method can not only remove the heavy metal ion in waste water, heavy metal ion can also be carried out concentrating and reclaiming simultaneously.Ion exchange method is the good method of current processing waste water containing chrome, and have exchange adsorption capacity large, recovering effect is good, and to environment non-secondary pollution, application is comparatively extensive, the advantages such as technology is more ripe.Have the ion-exchange unit of chromium or mercury in multiple removal waste water at present, but this type of ion-exchange unit is general only for single heavy metal ion, and service ability is poor continuously.
Summary of the invention
The object of the invention is to the shortcoming overcoming prior art, a kind of continuous multi-stage ion-exchange processing device for reclaiming heavy metal ion can removed various heavy component and can run continuously is simultaneously provided.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of continuous multi-stage ion-exchange processing device for reclaiming heavy metal ion of the present invention, it comprises wastewater treatment equipment and resin regenerating device two parts, wherein wastewater treatment equipment comprises the former bucket for storing waste water, former bucket by the first pipeline of being connected with the first pump with precipitate for silver ions the reaction settling basin reclaimed and be connected, water outlet pipeline by being equipped with valve at the bottom of described reaction settling basin pond is connected with silver chloride withdrawing can, described reaction settling basin is connected with precipitation agent pond by the precipitation agent line of pipes that the second pump is housed, the supernatant liquor outlet of opening on described reaction settling basin top is connected with pH regulator bucket water-in by the second pipeline, described pH regulator bucket and quartz sand column, trivalent chromic ion exchange column, hexavalent chromium exchange column and mercury ion exchange column are sequentially connected in series, wherein the water outlet of pH regulator bucket is connected with quartz sand column top water-in with the first manometric 3rd pipeline by connection the 3rd pump, water outlet at the bottom of the post of the first described quartz sand column is connected with water-in at the bottom of the post of trivalent chromic ion exchange column by being equipped with the second manometric 4th pipeline, the capital water outlet of described trivalent chromic ion exchange column is connected with hexavalent chromium exchange column capital water-in by being equipped with the 3rd manometric 5th pipeline, water outlet at the bottom of hexavalent chromium exchange column post is connected with water-in at the bottom of mercury ion exchange column post by being equipped with the 4th manometric 6th pipeline, mercury ion exchange column capital water outlet by rising pipe with go out bucket and be connected, quartz sand column capital connects eduction pipe and connects blow-down pipe at the bottom of post, at quartz sand column, trivalent chromic ion exchange column, hexavalent chromium exchange column and mercury ion exchange column post side joint have back flushing rising pipe, described resin regenerating device comprises the sour de-fluid drum that the acid regeneration pipe by being equipped with the 6th pump is connected with the import of mercury ion exchange column capital acid solution with trivalent chromic ion exchange column, by the alkali cleaning de-fluid drum that the alkali regenerating tube that the 5th pump is housed is connected with the import of hexavalent chromium exchange column capital alkali lye, by backwash tube respectively with the first quartz sand column, trivalent chromic ion exchange column, the recoil cask washing that the back flushing mouth at the bottom of each post of hexavalent chromium exchange column and mercury ion exchange column is connected and respectively by recovery line and trivalent chromic ion exchange column that under meter is housed, the regenerated liquid recycling bin that hexavalent chromium exchange column is connected with the regenerated liquid recovery port at the bottom of each post of mercury ion exchange column.
The invention has the advantages that: (1) present device is multipole ion switching equipment, silver ions, trivalent chromic ion, hexavalent chromium, the removal of mercury ion and collection can be carried out to high-concentration heavy metal waste water simultaneously, enhance equipment practicality; (2) present device contains wastewater treatment and resin regeneration, continuously-running, improves the processing efficiency of equipment; (3) present device is in high-concentration heavy metal waste water process, and processing cost is low, and technical process is simple, is easy to control, has good actual application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of continuous multi-stage ion-exchange processing device for reclaiming heavy metal ion of the present invention;
Fig. 2 is the structural representation of the ion exchange column in the treatment unit in Fig. 1.
Embodiment
Describe the present invention below in conjunction with specific embodiment.
A kind of continuous multi-stage ion-exchange processing device for reclaiming heavy metal ion of the present invention as shown in drawings, it comprises wastewater treatment equipment and resin regenerating device two parts, wherein wastewater treatment equipment comprises the former bucket 1 for storing waste water, former bucket 1 by the first pipeline of being connected with the first pump P1 with precipitate the reaction settling basin 2 reclaimed for silver ions and be connected, be connected with silver chloride withdrawing can 13 by the water outlet pipeline that valve is housed at the bottom of described reaction settling basin 2 pond, described reaction settling basin 2 is connected with precipitation agent pond 14 by the precipitation agent line of pipes that the second pump P2 is housed, the supernatant liquor outlet of opening on described reaction settling basin 2 top is connected with pH regulator bucket 3 water-in by the second pipeline, described pH regulator bucket 3 and quartz sand column 4, trivalent chromic ion exchange column 5, hexavalent chromium exchange column 6 and mercury ion exchange column 7 are sequentially connected in series, wherein the water outlet of pH regulator bucket 3 is connected with quartz sand column 4 top water-in with the first manometric 3rd pipeline by connection the 3rd pump P3, water outlet at the bottom of the post of the first described quartz sand column 4 is connected with water-in at the bottom of the post of trivalent chromic ion exchange column 5 by being equipped with the second manometric 4th pipeline, the capital water outlet of described trivalent chromic ion exchange column 5 is connected with hexavalent chromium exchange column 6 capital water-in by being equipped with the 3rd manometric 5th pipeline, water outlet at the bottom of hexavalent chromium exchange column 6 post is connected with water-in at the bottom of mercury ion exchange column 7 post by being equipped with the 4th manometric 6th pipeline, mercury ion exchange column 7 capital water outlet by rising pipe with go out bucket 8 and be connected, quartz sand column 4 capital connects eduction pipe and connects blow-down pipe at the bottom of post, at quartz sand column 4, trivalent chromic ion exchange column 5, hexavalent chromium exchange column 6 and mercury ion exchange column 7 post side joint have back flushing rising pipe, described resin regenerating device comprises the sour de-fluid drum 10 that the acid regeneration pipe by being equipped with the 6th pump P6 is connected with the import of mercury ion exchange column 7 capital acid solution with trivalent chromic ion exchange column 5, by the alkali cleaning de-fluid drum 9 that the alkali regenerating tube that the 5th pump P5 is housed is connected with the import of hexavalent chromium exchange column 6 capital alkali lye, by backwash tube respectively with the first quartz sand column 4, trivalent chromic ion exchange column 5, the recoil cask washing 11 that the back flushing mouth at the bottom of each post of hexavalent chromium exchange column 6 and mercury ion exchange column 7 is connected and respectively by recovery line and trivalent chromic ion exchange column 5 that under meter is housed, the regenerated liquid recycling bin 12 that hexavalent chromium exchange column 6 is connected with the regenerated liquid recovery port at the bottom of each post of mercury ion exchange column 7.
Quartz sand column 4 plays a role in filtering the suspended substance removed in waste water, trivalent chromic ion is removed by trivalent chromic ion exchange column afterwards in bottom in and top out mode, hexavalent chromium is removed by hexavalent chromium exchange column again in upper entering and lower leaving mode, finally remove mercury ion in bottom in and top out mode by mercury ion exchange column, finally enter out bucket 8.
Quartz sand column 4 and trivalent chromic ion exchange column 5 as shown in Figure 2, hexavalent chromium exchange column 6 and mercury ion exchange column 7 construct identical, include synthetic glass or glass steel material housing, water distributor B is respectively equipped with up and down in described housing, quartz sand is filled with in described quartz sand column 4 housing, at described trivalent chromic ion exchange column 5, resin S is filled with respectively in hexavalent chromium exchange column 6 and mercury ion exchange column 7, between quartz sand column and three ion exchange columns, order is through and considers the selectivity of resin to different ions, making full use of of exchange capacity of resin, the water outlet of different resins kenel, the factors such as pH change are determined.In trivalent chromic ion exchange column 5, resin can adopt D072 (Tianjin Nankai Hecheng S&T Co., Ltd.), in hexavalent chromium exchange column 6, resin is to adopt DEX-Hg (Zhengzhou Qin Shi Science and Technology Ltd.), and in mercury ion exchange column 7, resin can adopt DEX-Cr (Zhengzhou Qin Shi Science and Technology Ltd.).
The working process of this device is: first waste water add former bucket 1, squeeze into reaction settling basin 2 by the first pump P1 and carry out the recovery of silver ions precipitation, supernatant liquor enters pH regulator pond 3 by right side pipeline and carries out pH regulator, with the flow velocity of 3BV/h, waste water is squeezed into quartz sand column upper end by the 3rd pump P3 afterwards, in the mode of spray by quartz sand column 4, play a role in filtering, trivalent chromic ion is removed by trivalent chromic ion exchange column 5 afterwards in bottom in and top out mode, hexavalent chromium is removed by hexavalent chromium exchange column 6 again in upper entering and lower leaving mode, then mercury ion is removed in bottom in and top out mode by mercury ion exchange column 7, finally enter out bucket 8.When processing, resin when water sample reaches about 140BV is substantially saturated, now close water inlet, open back-purge system and carry out back flushing, sour elutriant enters trivalent chromic ion exchange column respectively with 2BV/h flow velocity and mercury ion exchange column carries out wash-out afterwards, alkali elutriant enters hexavalent chromium exchange column with 3BV/h flow velocity and carries out wash-out, respectively reclaiming liquid.
Adopt the process that this device carries out for laboratory COD waste water, treatment effect is as follows:
Water quality parameter before and after table 1. processes
As can be seen from the table, to the Ag in waste water
+adopting the AgCl precipitator method to process, is 3550mg/L at starting point concentration, and precipitation agent dosage is that under the condition of 4g NaCl/L waste water, precipitation 90min, clearance can reach more than 99%.Adopt storng-acid cation exchange resin D072 and DEX-Hg to the Cr in waste water respectively
3+and Hg
2+carry out Adsorption, clearance can reach 90% and 97%, and resin DEX-Cr can reach 99.3% to eliminating rate of absorption chromic in waste water.Visible device has good removal effect to contents of many kinds of heavy metal ion.
Claims (2)
1. one kind for reclaiming the continuous multi-stage ion-exchange processing device of heavy metal ion, it is characterized in that: it comprises wastewater treatment equipment and resin regenerating device two parts, wherein wastewater treatment equipment comprises the former bucket for storing waste water, former bucket by the first pipeline of being connected with the first pump with precipitate for silver ions the reaction settling basin reclaimed and be connected, water outlet pipeline by being equipped with valve at the bottom of described reaction settling basin pond is connected with silver chloride withdrawing can, described reaction settling basin is connected with precipitation agent pond by the precipitation agent line of pipes that the second pump is housed, the supernatant liquor outlet of opening on described reaction settling basin top is connected with pH regulator bucket water-in by the second pipeline, described pH regulator bucket and quartz sand column, trivalent chromic ion exchange column, hexavalent chromium exchange column and mercury ion exchange column are sequentially connected in series, wherein the water outlet of pH regulator bucket is connected with quartz sand column top water-in with the first manometric 3rd pipeline by connection the 3rd pump, water outlet at the bottom of the post of the first described quartz sand column is connected with water-in at the bottom of the post of trivalent chromic ion exchange column by being equipped with the second manometric 4th pipeline, the capital water outlet of described trivalent chromic ion exchange column is connected with hexavalent chromium exchange column capital water-in by being equipped with the 3rd manometric 5th pipeline, water outlet at the bottom of hexavalent chromium exchange column post is connected with water-in at the bottom of mercury ion exchange column post by being equipped with the 4th manometric 6th pipeline, mercury ion exchange column capital water outlet by rising pipe with go out bucket and be connected, quartz sand column capital connects eduction pipe and connects blow-down pipe at the bottom of post, at quartz sand column, trivalent chromic ion exchange column, hexavalent chromium exchange column and mercury ion exchange column post side joint have back flushing rising pipe, described resin regenerating device comprises the sour de-fluid drum that the acid regeneration pipe by being equipped with the 6th pump is connected with the import of mercury ion exchange column capital acid solution with trivalent chromic ion exchange column, by the alkali cleaning de-fluid drum that the alkali regenerating tube that the 5th pump is housed is connected with the import of hexavalent chromium exchange column capital alkali lye, by backwash tube respectively with the first quartz sand column, trivalent chromic ion exchange column, the recoil cask washing that the back flushing mouth at the bottom of each post of hexavalent chromium exchange column and mercury ion exchange column is connected and respectively by recovery line and trivalent chromic ion exchange column that under meter is housed, the regenerated liquid recycling bin that hexavalent chromium exchange column is connected with the regenerated liquid recovery port at the bottom of each post of mercury ion exchange column.
2. the continuous multi-stage ion-exchange processing device for reclaiming heavy metal ion according to claim 1, it is characterized in that: described quartz sand column constructs identical with trivalent chromic ion exchange column, hexavalent chromium exchange column and mercury ion exchange column, include synthetic glass or glass steel material housing, water distributor is respectively equipped with up and down in described housing, in described quartz sand column housing, be filled with quartz sand, in described trivalent chromic ion exchange column, hexavalent chromium exchange column and mercury ion exchange column, be filled with resin respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410649325.2A CN104355452A (en) | 2014-11-14 | 2014-11-14 | Continuous multistage ion-exchange treatment device for recovering heavy metal ions |
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| CN201410649325.2A CN104355452A (en) | 2014-11-14 | 2014-11-14 | Continuous multistage ion-exchange treatment device for recovering heavy metal ions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391147A (en) * | 2016-03-23 | 2017-02-15 | 江苏核电有限公司 | Resin regeneration and post-flushing method of steam generator drainage sewage purification system in nuclear power station |
| CN107089703A (en) * | 2017-05-19 | 2017-08-25 | 深圳市深投环保科技有限公司 | Hierarchy type Waste Water Treatment |
| CN107698067A (en) * | 2017-11-15 | 2018-02-16 | 维科诚（苏州）光伏科技有限公司 | A kind of silver-colored liquid waste treating apparatus of the black silicon of wet method |
-
2014
- 2014-11-14 CN CN201410649325.2A patent/CN104355452A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 李艳: "实验室高浓度特殊重金属废水多级离子交换处理技术研究", 《万方数据》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391147A (en) * | 2016-03-23 | 2017-02-15 | 江苏核电有限公司 | Resin regeneration and post-flushing method of steam generator drainage sewage purification system in nuclear power station |
| CN107089703A (en) * | 2017-05-19 | 2017-08-25 | 深圳市深投环保科技有限公司 | Hierarchy type Waste Water Treatment |
| CN107698067A (en) * | 2017-11-15 | 2018-02-16 | 维科诚（苏州）光伏科技有限公司 | A kind of silver-colored liquid waste treating apparatus of the black silicon of wet method |
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Application publication date: 20150218 |