CN215048964U - Online recovery unit of useless mercury of low concentration cyanide silver-plating rinsing - Google Patents
Online recovery unit of useless mercury of low concentration cyanide silver-plating rinsing Download PDFInfo
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- CN215048964U CN215048964U CN202121399835.0U CN202121399835U CN215048964U CN 215048964 U CN215048964 U CN 215048964U CN 202121399835 U CN202121399835 U CN 202121399835U CN 215048964 U CN215048964 U CN 215048964U
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- wastewater
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- 238000007747 plating Methods 0.000 title claims abstract description 23
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000011084 recovery Methods 0.000 title claims abstract description 12
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000002351 wastewater Substances 0.000 claims abstract description 60
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000006073 displacement reaction Methods 0.000 claims abstract description 31
- 239000011701 zinc Substances 0.000 claims abstract description 12
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 16
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 23
- 229910052709 silver Inorganic materials 0.000 abstract description 23
- 239000004332 silver Substances 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 11
- LFAGQMCIGQNPJG-UHFFFAOYSA-N silver cyanide Chemical compound [Ag+].N#[C-] LFAGQMCIGQNPJG-UHFFFAOYSA-N 0.000 description 6
- 238000009713 electroplating Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000011549 displacement method Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- -1 but the cost is high Chemical compound 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Removal Of Specific Substances (AREA)
Abstract
The utility model discloses an on-line recycling device for low-concentration cyanide silver-plating rinsing waste mercury, which comprises a waste water conveying pipe, a feeding pump, a replacement reactor, a filter pump and a filter press; the water outlet of the displacement reactor is respectively connected with the water inlet of the waste water station and the feed pump; the bottom of the displacer is connected with a filter pump through a bottom drainage pipeline, the filter pump is connected to a water inlet of a filter press through a pipeline, a water outlet of the filter press is connected with a water inlet of a waste water station, and an automatic lifting mechanism is arranged outside the displacer. The utility model discloses a method of zinc silk replacement retrieves the silver in the low concentration cyaniding silver-plating waste water, has easily operation, low cost, and characteristics that recovery efficiency is high detect the silver concentration in the waste water and reduce below 0.5ppm, accord with emission standard.
Description
Technical Field
The invention belongs to the field of industrial wastewater treatment, and particularly relates to an online recovery device for silver in low-concentration cyanide silver-plating rinsing wastewater.
Background
The cyanide silver plating waste water in the cyanide silver plating process mainly comes from aqueduct waste liquid, electroplating recovery liquid and rinsing waste water. The cleaning is the main source of cyanide silver plating wastewater, which accounts for more than 80% of the electroplating wastewater, and the electroplated plated piece firstly passes through a recovery tank, most of the plating solution is rinsed and recovered for distribution plating solution or pre-plating solution, and the silver content of the plating solution in the recovery tank is generally 0.5-0.9 g/L; the plated parts passing through the recovery tank are cleaned by counter-current rinsing in a rinsing tank, in which the silver content is generally 10-100mg/L, and is generally [ Ag (CN) ]n]n-1(2. ltoreq. n.ltoreq.4).
At present, the method for recovering silver from silver-containing electroplating wastewater mainly comprises an electrolysis method, an ion exchange method and a precipitation method, wherein the electrolysis method is used for wastewater with high silver concentration, the ion exchange method can recover trace silver, but the cost is high, and hydrogen sulfide gas or hydrocyanic acid is easily generated by the precipitation method. The displacement method is a very traditional method and has the advantages of treating wastes with processes of wastes against one another, simple operation, low cost, small occupied area of equipment, large treatment capacity and high recovery rate.
However, at present, when the silver in the cyanide silver plating wastewater is extracted by adopting a displacement method, the displacement agent needs to be continuously replaced, and the wastewater needs to be stirred, so that the labor intensity and the energy consumption are greatly increased, and the working efficiency of people is reduced. There is a need for a simple and efficient method for recovering silver from cyanide silver plating rinse wastewater.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, a retrieve device of silver-colored in low concentration cyanide silvering rinsing waste water on line is provided, the device has reduced intensity of labour, improves labor efficiency, reduces the characteristics that energy consumption and degree of automation are high.
In order to realize the technical purpose, the technical scheme of the utility model is that:
an on-line recycling device for waste mercury in low-concentration cyanide silver-plating rinsing, comprising:
the inlet end of the feeding pump is connected with the wastewater conveying pipe, and the outlet end of the feeding pump is connected with the water inlet of the displacement reactor through a first pipeline;
the replacement reactor comprises a reactor body, a plurality of partition plate groups which are arranged in parallel and have equal intervals are arranged in the reactor body, each partition plate group comprises two partition plates which are arranged in a staggered manner from top to bottom, and a limiting clamping groove connected with a zinc wire replacement frame is arranged on the partition plate between every two adjacent partition plate groups; the wastewater flows in the displacement reactor in an overflow mode, and flows through the zinc wire displacement frame from the bottom of the zinc wire conversion box each time to be displaced with the zinc wires in the zinc wire displacement frame;
the first pipeline is provided with a water inlet check valve, a first electromagnetic valve and a first flowmeter;
the water outlet of the displacement reactor is connected with the water inlet of a three-way valve through a second pipeline, one water outlet of the three-way valve is connected with the water inlet of the wastewater station, and the other water outlet of the three-way valve is connected with the water inlet of the feeding pump;
a silver ion detector is arranged on the second pipeline, and a second electromagnetic valve is arranged on the pipeline between the three-way valve and the water inlet of the wastewater station; a third electromagnetic valve is arranged on a pipeline between the three-way valve and the water inlet of the feed pump;
a signal receiving end of the control unit is in signal connection with the first flowmeter and the silver ion detector, and a signal output end of the control unit is connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the three-way valve;
the bottom of replacement reactor body is located the below of zinc silk replacement frame is equipped with the bottom outlet, be connected with bottom drainage pipe through the bottom drain valve on the bottom outlet, bottom drainage pipe's play water end passes through the pipeline and filters pump, filter press in proper order and is connected with the waste water station.
The pressure filter adopts a micropore precision pressure filter.
A second flowmeter is connected on a pipeline between the three-way valve and the water inlet of the wastewater station;
a third flow meter is connected on a pipeline between the three-way valve and the water inlet of the feed pump;
a fourth flowmeter is connected to a pipeline connecting the filter press and the wastewater station;
and the second flowmeter, the third flowmeter and the fourth flowmeter are all connected with a signal receiving end of the control unit.
And the upper part of the replacement reactor is provided with an automatic lifting mechanism, and the automatic lifting mechanism is used for transferring the zinc wire replacement frame into or out of the replacement reactor.
The control unit is a PLC.
And the second pipeline is also provided with a PH on-line controller and a dosing box, and the dosing box is used for adjusting the pH of the discharged water to be between 8.5 and 9.5.
The utility model has the advantages that:
compared with the prior art, the utility model has the advantages of it is following:
first, the utility model discloses a recovery of silver in the online low concentration cyanide silvering rinsing waste water, because the silver content in the waste water is very low, the zinc silk of putting into is very excessive, so will need the zinc silk reaction of the inside to need certain time completely, 6t zinc silk is put into to 1 inferior nature, and the frequency of changing the zinc silk is changed 1 times for 60 days, and changes and is gone on by automatic hoisting mechanism, has greatly reduced intensity of labour, has improved labor efficiency.
And secondly, the wastewater of the utility model adopts an overflow form in the replacement reactor, so that stirring is not needed, and the energy consumption is reduced.
Third, the utility model discloses set up online silver ion detector at the delivery port, what accord with national emission standard just discharges into the waste water station and carries out processing on next step, and the holding vessel that flows back again that does not conform to replaces, and flow, flow direction are controlled through the PLC system, and degree of automation is high.
Drawings
Fig. 1 is a front view of the utility model structure;
fig. 2 is a top view of the structure of the utility model;
FIG. 3 is an enlarged front view of a zinc wire displacing device;
fig. 4 is an enlarged plan view of the zinc wire replacement device.
Wherein, 1 is a waste water conveying pipe; 2 is a feed pump; 3 is a water inlet of the displacement reactor; 4 is a baffle group; 5 is a replacement reactor body; 6 is a water outlet of the replacement reactor; 7 is a bottom drain valve; 8 is a bottom drainage pipeline; 9 is a filter pump; 10 is a filter press; 11 is a pipeline connected with a wastewater station; 12 is an automatic hoisting mechanism; 13 is a zinc wire replacement frame; and 14 is a zinc wire.
Detailed Description
The solution of the present invention is further illustrated by the following examples and figures:
FIG. 1 is a schematic view showing the complete structure of the device of the present invention, wherein the device for on-line recovering silver from cyanide silver plating rinsing wastewater mainly comprises a feed pump 2, a displacement reactor body 5, a filter pump 9, a filter press 10, an automatic lifting mechanism 12, etc.; the wastewater conveying pipe 1 is connected with a water inlet of a feeding pump, and a water outlet of the feeding pump is connected with a water inlet 3 of a displacement reactor body 5; the wastewater at the water outlet 6 of the replacement reactor is discharged to a wastewater station and a feed pump 2 respectively; the bottom of the displacement reactor is respectively provided with a bottom drain valve 7 connected with a water delivery bottom drainage pipeline 8, the water delivery pipeline 8 is connected with a water inlet of a filter pump 9, a water outlet of the filter pump 9 is connected with a water inlet of a filter press 10, and a water outlet of the filter press 10 is connected with a wastewater station; and an automatic hoisting mechanism 12, a zinc wire replacing frame 13 and zinc wires 14 are arranged outside the replacement reactor.
And a water inlet check valve, a first electromagnetic valve and a first flowmeter are arranged on a first pipeline between the feed pump 2 and the water inlet of the displacement reactor body 5.
Partition plate groups 4 with equal intervals are arranged in the displacement reactor body 5, each partition plate group 4 comprises two partition plates which are arranged in a staggered manner from top to bottom, and limit clamping grooves with equal intervals are respectively arranged on the partition plates between the adjacent partition plate groups;
in this embodiment, the number of the displacement reactor bodies 5 is two, the two displacement reactor bodies 5 are arranged in parallel, as shown in fig. 2, 4 zinc wire displacement frames with the same size and the same distance are respectively arranged in each displacement reactor body 5; each zinc wire replacement frame is composed of three zinc wire replacement frames 13 with the same size, and the zinc wire replacement frames are respectively clamped on the limiting clamping grooves of the partition plates;
the water outlet of the displacement reactor is connected with the water inlet of a three-way valve through a second pipeline, one water outlet of the three-way valve is connected with the water inlet of the wastewater station, and the other water outlet of the three-way valve is connected with the water inlet of the feeding pump;
a PH online controller, a silver ion detector and a dosing tank are sequentially arranged on the second pipeline along the water flow direction, and a second electromagnetic valve is arranged on the pipeline between the three-way valve and the water inlet of the wastewater station; a third electromagnetic valve is arranged on a pipeline between the three-way valve and the water inlet of the feed pump;
and a signal receiving end of the PLC is in signal connection with the PH on-line controller and the silver ion detector, and a signal output end of the control unit is connected with the electromagnetic valve and a dosing valve of the dosing tank.
As a preferred embodiment of the present invention, a microporous precision pressure filter is used as the pressure filter 10.
As a preferred embodiment of the present invention, a second flowmeter is connected to a pipe between the three-way valve and the water inlet of the waste water station; a third flow meter is connected on a pipeline between the three-way valve and the water inlet of the feed pump; and a fourth flowmeter is connected on a pipeline connecting the filter press and the wastewater station. And the second flowmeter, the third flowmeter and the fourth flowmeter are all connected with a signal receiving end of the control unit.
And the upper part of the replacement reactor is provided with an automatic lifting mechanism, and the automatic lifting mechanism is used for transferring the zinc wire replacement frame into or out of the replacement reactor.
The utility model discloses a theory of operation is:
firstly, cyanide silver-plating rinsing wastewater in a buffer tank is input into a displacement reactor body 5 through a wastewater conveying pipe 1 and a feeding pump 2, check valves, a first electromagnetic valve and a first flow meter are arranged on water inlet pipes of the feeding pump 2 and the displacement reactor body 5, and the input amount of the wastewater can be accurately controlled through the first flow meter.
The wastewater flows in the replacement reactor body 5 in an overflow mode, flows through the zinc wire replacement frame 13 layer by layer from the bottom of the zinc wire conversion box each time, is replaced with the zinc wires 14 inside, and the replacement reactor body 5 is arranged in a parallel mode, so that the system can be kept in operation when the replacement frame 13 is cleaned.
The displaced silver exists in a simple substance form, one part of the displaced silver is attached to the surface of the zinc wire 14, the other part of the displaced silver is deposited at the bottom of the displacement reactor body 5, the silver attached to the surface of the zinc wire 14 can be taken out by the automatic hoisting mechanism 12 and then recovered, the wastewater finally flows out of the displacement reactor body 5, passes through the online silver ion detector at the water outlet 6, is discharged into a wastewater station to be treated for the next step when meeting the national discharge standard, and returns to the displacement reactor body again to be displaced when not meeting the national discharge standard.
The flow and the flow direction are controlled by a PLC system, and a second flowmeter is connected on a pipeline between the three-way valve and the water inlet of the wastewater station; a third flow meter is connected on a pipeline between the three-way valve and the water inlet of the feed pump; a fourth flowmeter is connected to a pipeline connecting the filter press and the wastewater station;
and the second flowmeter, the third flowmeter and the fourth flowmeter record the amount of the wastewater flowing through, and when the rated flow is reached, a valve on the pipeline is automatically disconnected, and the input of the wastewater is suspended.
The pH value of the wastewater subjected to replacement in the replacement reactor body 5 is controlled to be 8.5-9.5 through the pH on-line detector and the dosing box on the water outlet of the second pipeline, so that the wastewater can conveniently flow into a wastewater station for further treatment.
Silver deposited at the bottom of the replacement reactor body 5 can open a bottom drain valve 7, the silver is conveyed into a filter press 10 through a bottom drain pipe 8 and a filter pump 9 for filter pressing, the filter-pressed wastewater is directly discharged into a wastewater station, and the filter residue and the silver recovered in a zinc wire replacement frame 13 are subjected to next treatment; the replacement frequency of the zinc wire is determined according to the silver content of the effluent of the system, and the zinc wire can be replaced when the silver content of the effluent of the system is higher than 0.5 ppm.
The device system has the advantages of high recovery speed, easy operation, high automation degree, small occupied area and the like. The optimal process parameters processed by the system are as follows:
| name (R) | Processing capacity | Ag after treatment | Zn after treatment | pH after treatment | Amount of zinc wire used | Frequency of zinc wire replacement |
| Parameter(s) | 500m³/d | ≤0.5ppm | ≤20ppm | 9-10 | 6 t/time | 60 d/time |
The above description is only a preferred embodiment of the present invention, and should not be construed as limiting the technical solutions of the present invention, and the technical solutions that are added, removed, replaced, changed or modified according to the above description should all belong to the protection scope of the appended claims of the present invention.
Claims (6)
1. An online recovery unit of useless mercury of low concentration cyanide silver-plating rinsing, characterized by includes:
the inlet end of the feeding pump is connected with the wastewater conveying pipe, and the outlet end of the feeding pump is connected with the water inlet of the displacement reactor through a first pipeline;
the replacement reactor comprises a reactor body, a plurality of partition plate groups which are arranged in parallel and have equal intervals are arranged in the reactor body, each partition plate group comprises two partition plates which are arranged in a staggered manner from top to bottom, and a limiting clamping groove connected with a zinc wire replacement frame is arranged on the partition plate between every two adjacent partition plate groups; the wastewater flows in the displacement reactor in an overflow mode, and flows through the zinc wire displacement frame from the bottom of the zinc wire conversion box each time to be displaced with the zinc wires in the zinc wire displacement frame;
the first pipeline is provided with a water inlet check valve, a first electromagnetic valve and a first flowmeter;
the water outlet of the displacement reactor is connected with the water inlet of a three-way valve through a second pipeline, one water outlet of the three-way valve is connected with the water inlet of the wastewater station, and the other water outlet of the three-way valve is connected with the water inlet of the feeding pump;
a silver ion detector is arranged on the second pipeline, and a second electromagnetic valve is arranged on the pipeline between the three-way valve and the water inlet of the wastewater station; a third electromagnetic valve is arranged on a pipeline between the three-way valve and the water inlet of the feed pump;
a signal receiving end of the control unit is in signal connection with the first flowmeter and the silver ion detector, and a signal output end of the control unit is connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the three-way valve;
the bottom of replacement reactor body is located the below of zinc silk replacement frame is equipped with the bottom outlet, be connected with bottom drainage pipe through the bottom drain valve on the bottom outlet, bottom drainage pipe's play water end passes through the pipeline and filters pump, filter press in proper order and is connected with the waste water station.
2. The on-line recycling device of low concentration cyanide silver-plating rinse waste mercury according to claim 1, characterized in that the pressure filter is a microporous precision pressure filter.
3. The on-line recycling device of low concentration cyanide silver-plating rinse waste mercury according to claim 1, wherein a second flowmeter is connected to a pipe between the three-way valve and the inlet of the wastewater station;
a third flow meter is connected on a pipeline between the three-way valve and the water inlet of the feed pump;
a fourth flowmeter is connected to a pipeline connecting the filter press and the wastewater station;
and the second flowmeter, the third flowmeter and the fourth flowmeter are all connected with a signal receiving end of the control unit.
4. The on-line recycling device of low-concentration cyanide silver-plating rinse waste mercury according to claim 1, wherein an automatic lifting mechanism is arranged at the upper part of the displacement reactor, and the automatic lifting mechanism is used for transferring the zinc wire displacement frame into or out of the displacement reactor.
5. The on-line recycling device of low concentration cyanide silver-plating rinse waste mercury according to claim 1, wherein the control unit is a PLC.
6. The on-line recycling device of low concentration cyanide silver-plating rinse waste mercury according to claim 1, characterized in that: and the second pipeline is also provided with a PH on-line controller and a dosing box, and the dosing box is used for adjusting the pH of the discharged water to be between 8.5 and 9.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121399835.0U CN215048964U (en) | 2021-06-23 | 2021-06-23 | Online recovery unit of useless mercury of low concentration cyanide silver-plating rinsing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121399835.0U CN215048964U (en) | 2021-06-23 | 2021-06-23 | Online recovery unit of useless mercury of low concentration cyanide silver-plating rinsing |
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| Publication Number | Publication Date |
|---|---|
| CN215048964U true CN215048964U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121399835.0U Active CN215048964U (en) | 2021-06-23 | 2021-06-23 | Online recovery unit of useless mercury of low concentration cyanide silver-plating rinsing |
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| Country | Link |
|---|---|
| CN (1) | CN215048964U (en) |
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2021
- 2021-06-23 CN CN202121399835.0U patent/CN215048964U/en active Active
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