CN110937656A - Full-automatic electroplating nickel wastewater zero-discharge equipment and operation method thereof - Google Patents
Full-automatic electroplating nickel wastewater zero-discharge equipment and operation method thereof Download PDFInfo
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- CN110937656A CN110937656A CN201910987412.1A CN201910987412A CN110937656A CN 110937656 A CN110937656 A CN 110937656A CN 201910987412 A CN201910987412 A CN 201910987412A CN 110937656 A CN110937656 A CN 110937656A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000002351 wastewater Substances 0.000 title claims abstract description 47
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 46
- 238000009713 electroplating Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 292
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 137
- 239000012528 membrane Substances 0.000 claims abstract description 71
- 239000013505 freshwater Substances 0.000 claims abstract description 18
- 238000007747 plating Methods 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims description 43
- 230000001105 regulatory effect Effects 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 238000011010 flushing procedure Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 3
- 229910001453 nickel ion Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000008237 rinsing water Substances 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 159000000009 barium salts Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Abstract
The invention discloses full-automatic electro-nickel plating wastewater zero-discharge equipment which is high in concentration efficiency, easy to maintain, simple and reliable to operate and capable of realizing complete recycling of nickel water and an operation method thereof. The full-automatic electro-nickel plating wastewater zero-discharge equipment comprises a primary reverse osmosis system, a secondary reverse osmosis system and an electrical control box, wherein the primary reverse osmosis system comprises a nickel rinsing wastewater water tank, a water supply pump, a primary filter assembly, a primary reverse osmosis membrane host and a pure water tank which are sequentially connected; the second-stage reverse osmosis system comprises a middle water tank, a booster pump, a second-stage filter assembly, a second-stage reverse osmosis membrane host and a concentrated water tank which are sequentially connected, wherein a fresh water discharge port of the first-stage reverse osmosis membrane host is connected with the pure water tank, a concentrated water discharge port of the first-stage reverse osmosis membrane host is connected with the middle water tank, a fresh water discharge port of the second-stage reverse osmosis membrane host is connected with the nickel rinsing wastewater tank, and a concentrated water discharge port of the second-stage reverse. The invention is applied to the technical field of electroplating wastewater.
Description
Technical Field
The invention relates to an electroplating nickel wastewater discharge device, in particular to a full-automatic electroplating nickel wastewater zero discharge device and an operation method thereof.
Background
Electroplating is one of three major global pollution industries today. According to statistics, the electroplating wastewater discharged by the national electroplating industry every year is about 40 billions of cubic meters, which is equivalent to the water supply amount of tap water in several large and medium-sized cities, and the shortage of water resources is seriously aggravated. Because the water consumption for electroplating is large, and the waste water and the waste liquid discharged by an electroplating factory contain a large amount of metal ions, the pollution is serious, and the electroplating industry cannot be continuously developed. At present, for the sustainable development of the electroplating industry, some treatment processes of electroplating wastewater are also developed, such as chemical methods of common neutralization precipitation method, neutralization coagulation precipitation method, oxidation method, reduction method, barium salt method, ferrite method and the like, and although the chemical methods have simple equipment, less investment and wide application, sludge is often left to be further treated.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides full-automatic electroplating nickel wastewater zero-discharge equipment which has high concentration efficiency, is easy to maintain, is simple and reliable to operate and can realize complete recycling of nickel water and an operation method thereof.
The technical scheme adopted by the invention is as follows: the full-automatic electroplating nickel wastewater zero-discharge equipment comprises a primary reverse osmosis system, a secondary reverse osmosis system and an electrical control box, wherein the electrical control box is electrically connected with the primary reverse osmosis system and the secondary reverse osmosis system, and the primary reverse osmosis system comprises a nickel rinsing wastewater water tank, a water supply pump, a primary filter assembly, a primary reverse osmosis membrane host and a pure water tank which are sequentially connected; the secondary reverse osmosis system comprises a middle water tank, a booster pump, a secondary filter component, a secondary reverse osmosis membrane host and a concentrated water tank which are connected in sequence, wherein a fresh water discharge port of the primary reverse osmosis membrane host is connected with the pure water tank, a concentrated water discharge port of the primary reverse osmosis membrane host is connected with the middle water tank, a fresh water discharge port of the secondary reverse osmosis membrane host is connected with the nickel rinsing wastewater tank, and a concentrated water discharge port of the secondary reverse osmosis membrane host is connected with the concentrated water tank.
Furthermore, a first-stage pure water three-way valve is arranged between the fresh water discharge port of the first-stage reverse osmosis membrane main machine and the pure water tank, a first-stage pressure regulating valve, a first conductivity meter, a first concentrated water hand valve and a first-stage concentrated water three-way valve are sequentially arranged between the concentrated water discharge port of the first-stage reverse osmosis membrane main machine and the middle water tank, and the first-stage pure water three-way valve is connected with a pipeline between the first conductivity meter and the first concentrated water hand valve; a second-stage pressure regulating valve, a second conductivity meter, a second-stage concentrated water three-way valve and a second concentrated water hand valve are sequentially arranged between a concentrated water discharge port of the second-stage reverse osmosis membrane main machine and the concentrated water tank, and a third valve port of the second-stage concentrated water three-way valve is connected with the intermediate water tank.
Furthermore, the primary filter assembly comprises an activated carbon filter and a first safety filter, a water inlet of the activated carbon filter is connected with the water supply pump, a water outlet of the activated carbon filter is connected with a water inlet of the first safety filter, a water outlet of the first safety filter is connected with the primary reverse osmosis membrane host, and a first water inlet valve, a third conductivity meter and a first high-pressure pump are sequentially arranged between the water outlet of the first safety filter and the primary reverse osmosis membrane host; the secondary filter assembly comprises a second safety filter, and a second water inlet valve and a second high-pressure pump are sequentially arranged between the second safety filter and the secondary reverse osmosis membrane main machine.
Furthermore, the primary reverse osmosis system also comprises a primary cleaning system, the primary cleaning system comprises a primary flushing valve, a primary backflow hand valve and a circulating water pump which are sequentially connected, the primary flushing valve is connected with a concentrated water discharge port of the primary reverse osmosis membrane main machine, the circulating water pump is connected with a pipeline between the first water inlet valve and the first high-pressure pump, and the primary flushing valve is connected with the pure water tank; the secondary reverse osmosis system also comprises a secondary flushing valve, and the secondary flushing valve is arranged on a branch pipeline between a concentrated water discharge port of the secondary reverse osmosis membrane main machine and the secondary pressure regulating valve.
Further, one-level reverse osmosis system still includes one-level backward flow subassembly, one-level backward flow subassembly including set up in the first level sensor and the one-level backflow pipeline of middle water tank, one end and the dense water three-way valve of one-level backflow pipeline are connected, the other end of one-level backflow pipeline with nickel rinsing waste water tank is connected.
Furthermore, a first pressure gauge is arranged at a water outlet of the water supply pump, a first flowmeter is arranged between the first-stage backflow hand valve and the circulating water pump, a second flowmeter is arranged between the first-stage pressure regulating valve and the first concentrated water hand valve, a third conductivity meter is arranged between a fresh water discharge port of the first-stage reverse osmosis membrane host and the first-stage pure water three-way valve, and a third flowmeter is arranged between the second-stage pressure regulating valve and the second-stage concentrated water three-way valve.
Further, a first cleaning reserved pipe is arranged between the first water inlet valve and the first high-pressure pump, a first cleaning backflow discharge valve port is arranged on the first-stage backflow pipeline, a second cleaning reserved pipe is arranged between the second water inlet valve and the second high-pressure pump, a second cleaning backflow discharge valve port is arranged on a pipeline between a third valve port of the second-stage concentrated water three-way valve and the intermediate water tank, and control valves are arranged on the first cleaning reserved pipe and the second cleaning reserved pipe.
The operation method of the full-automatic electroplating nickel wastewater zero-discharge equipment comprises the following steps:
A. manual operation of the primary system: a1. a switch on a first-stage reverse osmosis system of the electric control box is shifted to a cleaning position; a2. sequentially shifting the switches of the first water inlet valve and the first-stage flushing valve to manual positions, and shifting the switch of the first-stage water supply pump to the manual positions after 5 seconds; a3. after the pressure value of the first pressure gauge reaches more than 0.25Mpa, a first high-pressure pump switch is switched to a manual position, a first-stage backflow hand valve and a first concentrated water hand valve are adjusted, and the backflow flow on the first flowmeter is confirmed to meet the set parameter value; a4. slowly adjusting the primary pressure regulating valve, boosting the pressure to enable the second flowmeter to reach a set parameter value, and micro-adjusting the primary reflux valve and the first concentrated water hand valve in the process to ensure that the reflux flow is not changed; a5. when the third conductivity meter detects that the conductivity of the produced water is qualified, the first-stage pure water three-way valve switch is switched to a manual position; a6. when the conductivity of the concentrated water detected by the first conductivity meter reaches a set value of 15000us/cm, a first-stage concentrated water three-way valve is switched to a manual position; a7. the shutdown sequence is reverse operation from a serial number a6 to a1, wherein the positions of the primary backflow hand valve, the first concentrated water hand valve and the primary pressure regulating valve are kept unchanged;
B. manual operation of the secondary system: b1. when the intermediate water tank is filled with water, a switch on a secondary reverse osmosis system of the electric control box is shifted to a cleaning position; b2. the switches of the second water inlet valve and the second-stage flushing valve are switched to manual positions; b, increasing a pump switch to be shifted to a manual position after 3.5 seconds, and shifting a second high-pressure pump switch to the manual position after the water inlet pressure of the second-stage concentrated water reaches more than 0.25 Mpa; b4. slowly adjusting the secondary pressure regulating valve until the third flowmeter reaches set parameters; b5. when the conductivity of the concentrated water of the second conductivity meter reaches a set value of 45000us/cm, a switch of the second-level concentrated water three-way valve is switched to a manual position; b6. the shutdown sequence is reverse operation from sequence number b5 to b 1;
C. the primary system is automatically started and operated: c1. after the manual debugging is finished, the automatic debugging can be started, switches on all the first-stage reverse osmosis systems on the panel in the electrical control box are switched to a water production position, the first-stage reverse osmosis systems automatically run in an automatic mode, and the adjusted first-stage reflux valve, the first concentrated water hand valve and the first-stage pressure regulating valve do not need to be adjusted randomly after the manual debugging is finished; c2. when the electric control box is shut down, switches on all the first-stage reverse osmosis systems on the inner panel of the electric control box are only required to be shifted to the middle position;
D. the second-level system is automatically started and operated: d1. after the manual debugging is finished, the automatic debugging can be started, all switches on the secondary reverse osmosis systems on the panel in the electrical control box are switched to a water production position, the secondary reverse osmosis systems automatically run in an automatic mode, and the adjusted secondary reflux valves, the second concentrated water hand valves and the secondary pressure regulating valves do not need to be adjusted randomly after the manual debugging is finished; d2. when the electric control box is shut down, all switches on the secondary reverse osmosis systems on the panel in the electric control box are only required to be switched to the middle position.
The invention has the beneficial effects that: the full-automatic electroplating nickel wastewater zero-discharge equipment comprises a primary reverse osmosis system, a secondary reverse osmosis system and an electrical control box, wherein the electrical control box is electrically connected with the primary reverse osmosis system and the secondary reverse osmosis system, and the primary reverse osmosis system comprises a nickel rinsing wastewater water tank, a water supply pump, a primary filter assembly, a primary reverse osmosis membrane host and a pure water tank which are sequentially connected; the secondary reverse osmosis system comprises a middle water tank, a booster pump, a secondary filter assembly, a secondary reverse osmosis membrane host and a concentrated water tank which are connected in sequence, wherein a fresh water discharge port of the primary reverse osmosis membrane host is connected with the pure water tank, a concentrated water discharge port of the primary reverse osmosis membrane host is connected with the middle water tank, a fresh water discharge port of the secondary reverse osmosis membrane host is connected with the nickel rinsing wastewater tank, and a concentrated water discharge port of the secondary reverse osmosis membrane host is connected with the concentrated water tank, so that nickel wastewater in the nickel rinsing wastewater tank is pressurized by a water supply pump, pretreated by an activated carbon filter and a first safety filter, enters the primary reverse osmosis membrane host to separate nickel water and pure water with high concentration, and the pure water is directly pumped to a production line through a pure water pump connected with a water outlet of a pure water tank to serve as pure water for cleaning parts, the high-concentration nickel water is collected by the intermediate water tank and then enters the secondary reverse osmosis membrane host to be concentrated for multiple times, the permeation liquid (pure water) is recycled to the nickel rinsing wastewater tank to be filtered again, and finally the permeation liquid (pure water) returns to the electroplating production line to be used as pure water for cleaning parts, the concentration of the nickel ion-containing water reaches the recycled nickel ion-containing water, and the nickel ion-containing water is recycled to the electroplating bath to be reused, so that the aim of zero emission is fulfilled; and the operation method of the full-automatic electroplating nickel wastewater zero-discharge equipment only needs to carry out debugging and operation from the step A to the step E, the whole operation is simple and reliable, and the subsequent automation degree is high.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is an enlarged schematic view of part A of the present invention;
FIG. 3 is an enlarged schematic view of section B of the present invention;
FIG. 4 is an enlarged schematic view of section C of the present invention;
as shown in fig. 1 to 4, in the present embodiment, the present invention includes a full-automatic electroless nickel plating wastewater zero discharge apparatus and an operation method thereof, the full-automatic electroless nickel plating wastewater zero discharge apparatus includes a primary reverse osmosis system, a secondary reverse osmosis system and an electrical control box, the electrical control box is electrically connected to the primary reverse osmosis system and the secondary reverse osmosis system, the electrical control box includes a control panel, the control panel is provided with a first operation key set electrically connected to the primary reverse osmosis system and a second operation key set electrically connected to the secondary reverse osmosis system, the primary reverse osmosis system includes a nickel rinsing wastewater tank 1, a water supply pump 2, a primary filter assembly 3, a first high pressure pump 24, a primary reverse osmosis membrane host 4 and a pure water tank 5 which are connected in sequence, a water outlet pipe of the pure water tank 5 is connected to an external pure water pump, the pure water pump is connected with a pure water spray head of the production line; the second-stage reverse osmosis system comprises a middle water tank 6, a booster pump 7, a second-stage filter component 8, a second high-pressure pump 26, a second-stage reverse osmosis membrane main machine 9 and a concentrated water tank 10 which are connected in sequence, a fresh water discharge port of the first-stage reverse osmosis membrane main machine 4 is connected with the pure water tank 5, a concentrated water discharge port of the first-stage reverse osmosis membrane main machine 4 is connected with the middle water tank 6, a fresh water discharge port of the second-stage reverse osmosis membrane main machine 9 is connected with the nickel rinsing wastewater tank 1, a concentrated water discharge port of the second-stage reverse osmosis membrane main machine 9 is connected with the concentrated water tank 10, and the concentrated water tank 10 is connected with.
Detailed Description
In this embodiment, a first-stage pure water three-way valve 11 is disposed between the fresh water discharge port of the first-stage reverse osmosis membrane main unit 4 and the pure water tank 5, a first-stage pressure regulating valve 12, a first conductivity meter 13, a first concentrated water hand valve 14 and a first-stage concentrated water three-way valve 15 are sequentially disposed between the concentrated water discharge port of the first-stage reverse osmosis membrane main unit 4 and the intermediate water tank 6, and the first-stage pure water three-way valve 11 is connected to a pipeline between the first conductivity meter 13 and the first concentrated water hand valve 14; a second-stage pressure regulating valve 16, a second conductivity meter 17, a second-stage concentrated water three-way valve 18 and a second concentrated water hand valve 19 are sequentially arranged between the concentrated water discharge port of the second-stage reverse osmosis membrane host 9 and the concentrated water tank 10, a third valve port of the second-stage concentrated water three-way valve 18 is connected with the intermediate water tank 6, when the first conductivity meter 13 detects that the conductivity of the first-stage concentrated water is lower than a set value, namely the requirement of pure water discharge is met, the first concentrated water hand valve 14 is closed, the first-stage pure water three-way valve 11 is communicated with a pipeline between the first conductivity meter 13 and the first concentrated water hand valve 14, and the set value can be 700 plus 1500 us/cm.
In this embodiment, a first-stage pure water three-way valve 11 is disposed between the fresh water discharge port of the first-stage reverse osmosis membrane main unit 4 and the pure water tank 5, a first-stage pressure regulating valve 12, a first conductivity meter 13, a first concentrated water hand valve 14 and a first-stage concentrated water three-way valve 15 are sequentially disposed between the concentrated water discharge port of the first-stage reverse osmosis membrane main unit 4 and the intermediate water tank 6, and the first-stage pure water three-way valve 11 is connected to a pipeline between the first conductivity meter 13 and the first concentrated water hand valve 14; a second-stage pressure regulating valve 16, a second conductivity meter 17, a second-stage concentrated water three-way valve 18 and a second concentrated water hand valve 19 are sequentially arranged between the concentrated water discharge port of the second-stage reverse osmosis membrane host 9 and the concentrated water tank 10, a third valve port of the second-stage concentrated water three-way valve 18 is connected with the intermediate water tank 6, when the first conductivity meter 13 detects that the conductivity of the first-stage concentrated water is lower than a set value, namely the requirement of pure water discharge is met, the first concentrated water hand valve 14 is closed, the first-stage pure water three-way valve 11 is communicated with a pipeline between the first conductivity meter 13 and the first concentrated water hand valve 14, and the set value can be 700 plus 1500 us/cm.
In this embodiment, the primary filter assembly 3 includes an activated carbon filter 20 and a first safety filter 21, a water inlet of the activated carbon filter 20 is connected to the water supply pump 2, a water outlet of the activated carbon filter 20 is connected to a water inlet of the first safety filter 21, a water outlet of the first safety filter 21 is connected to the primary reverse osmosis membrane host 4, and a first water inlet valve 22 and a third conductivity meter 23 are sequentially disposed between the water outlet of the first safety filter 21 and the primary reverse osmosis membrane host 4; the secondary filter component 8 comprises a second security filter, and a second water inlet valve 25 is further sequentially arranged between the second security filter and the secondary reverse osmosis membrane main machine 9.
In this embodiment, the primary reverse osmosis system further comprises a primary cleaning system, the primary cleaning system comprises a primary flush valve 27, a primary backflow hand valve 28 and a circulating water pump 29 which are sequentially connected, the primary flush valve 27 is connected with a concentrated water discharge port of the primary reverse osmosis membrane main unit 4, the circulating water pump 29 is connected with a pipeline between the first water inlet valve 22 and the first high-pressure pump 24, and the primary flush valve 27 is connected with the pure water tank 5; the secondary reverse osmosis system further comprises a secondary flushing valve 30, and the secondary flushing valve 30 is installed on a branch pipeline between a concentrated water discharge port of the secondary reverse osmosis membrane main machine 9 and the secondary pressure regulating valve 16.
In this embodiment, the primary reverse osmosis system further includes a primary backflow component, the primary backflow component includes a first water level sensor and a primary backflow pipeline 31 which are disposed in the intermediate water tank 6, one end of the primary backflow pipeline 31 is connected to the primary concentrated water three-way valve 15, and the other end of the primary backflow pipeline 31 is connected to the nickel rinsing wastewater tank 1, and this design is to prevent water in the intermediate water tank 6 from overflowing, so that when the first water level sensor detects that water in the intermediate water tank 6 is full, water in the intermediate water tank 6 flows back into the nickel rinsing wastewater tank 1 through the primary backflow pipeline 31.
In this embodiment, a first pressure gauge 32 is disposed at the water outlet of the water supply pump 2, a first flow meter 33 is disposed between the first-stage return hand valve 28 and the circulating water pump 29, a second flow meter 34 is disposed between the first-stage pressure regulating valve 12 and the first concentrated water hand valve 14, a third conductivity meter 411 is disposed between the fresh water outlet of the first-stage reverse osmosis membrane main unit 4 and the first-stage pure water three-way valve 11, and a third flow meter 35 is disposed between the second-stage pressure regulating valve 16 and the second-stage concentrated water three-way valve 18.
In this embodiment, a first cleaning reserve pipe 36 is disposed between the first feed valve 22 and the first high-pressure pump 24, a first cleaning backflow discharge valve port 37 is disposed on the first-stage return pipe 31, a second cleaning reserve pipe 38 is disposed between the second feed valve 25 and the second high-pressure pump 26, a second cleaning backflow discharge valve port 39 is disposed on a pipe between the third valve port of the second-stage concentrate three-way valve 18 and the intermediate tank 6, and a control valve 40 is disposed on each of the first cleaning reserve pipe 36 and the second cleaning reserve pipe 38.
In this embodiment, an operation method of a full-automatic electroplating nickel wastewater zero-discharge apparatus adopts a full-automatic control mode, and can set the concentration of a concentrated solution according to the condition of an electroplating bath solution, and then the apparatus can continuously prepare the concentrated solution with a required concentration, and the method includes the following steps:
A. manual operation of the primary system: a1. a switch on a first-stage reverse osmosis system of the electric control box is shifted to a cleaning position; a2. sequentially switching the first water inlet valve 22 and the first-stage flushing valve 27 to manual positions, and switching the first-stage water supply pump 2 to the manual positions after 5 seconds; a3. after the pressure value of the first-stage return pipeline 32 reaches more than 0.25Mpa, the switch of the first high-pressure pump 24 is switched to a manual position, the first-stage return hand valve 28 and the first concentrated water hand valve 14 are adjusted, and the return flow on the first flowmeter 33 is confirmed to meet the set parameter value; a4. slowly adjusting the primary pressure regulating valve 12, boosting the pressure to enable the second flowmeter 34 to rise to a set parameter value, and in the process, micro-adjusting the primary reflux valve and the first concentrated water hand valve 14 to ensure that the reflux flow is not changed; a5. when the third conductivity meter 411 detects that the water production conductivity is qualified, the switch of the first-stage pure water three-way valve 11 is switched to a manual position; a6. when the first conductivity meter 13 detects that the conductivity of the concentrated water reaches a set value of 15000us/cm, the switch of the first-stage concentrated water three-way valve 15 is switched to a manual position; a7. the shutdown sequence is reverse operation from sequence a6 to a1, wherein the positions of the primary return hand valve 28, the first concentrate hand valve 14 and the primary pressure regulating valve 12 are kept unchanged;
B. manual operation of the secondary system: b1. when the intermediate water tank 6 is filled with water, a switch on a secondary reverse osmosis system of the electric control box is switched to a cleaning position; b2. the switches of the second water inlet valve 25 and the second-stage flushing valve 30 are switched to manual positions; b, increasing a pump switch to be switched to a manual position after 3.5 seconds, and switching a second high-pressure pump 26 to be switched to the manual position after the second-stage concentrated water inlet pressure reaches over 0.25 Mpa; b4. slowly adjusting the second-stage pressure regulating valve 16 to the third flow meter 35 to reach set parameters; b5. when the conductivity of the concentrated water of the second conductivity meter 17 reaches a set value of 45000us/cm, the switch of the second-stage concentrated water three-way valve 18 is switched to a manual position; b6. the shutdown sequence is reverse operation from sequence number b5 to b 1;
C. the primary system is automatically started and operated: c1. after the manual debugging is finished, the automatic debugging can be started, switches on all the first-stage reverse osmosis systems on the panel in the electrical control box are switched to a water production position, the first-stage reverse osmosis systems automatically run in an automatic mode, and the adjusted first-stage return valves, the first concentrated water hand valve 14 and the first-stage pressure regulating valve 12 do not need to be adjusted randomly after the manual debugging is finished; c2. when the electric control box is shut down, switches on all the first-stage reverse osmosis systems on the inner panel of the electric control box are only required to be shifted to the middle position;
D. the second-level system is automatically started and operated: d1. after the manual debugging is finished, the automatic debugging can be started, all switches on the secondary reverse osmosis systems on the panel in the electrical control box are switched to a water production position, the secondary reverse osmosis systems automatically run in an automatic mode, and the adjusted secondary reflux valves, the second concentrated water hand valves 19 and the secondary pressure regulating valves 16 do not need to be adjusted randomly after the manual debugging is finished; d2. when the electric control box is shut down, all switches on the secondary reverse osmosis systems on the panel in the electric control box are only required to be switched to the middle position;
E. membrane cleaning: e1. when the full-automatic electro-nickel plating wastewater zero-discharge equipment operates for a period of time, the water yield of the primary reverse osmosis system is reduced, the conductivity is unchanged, and the primary reverse osmosis system needs to be cleaned when the operating pressure is increased; e2. firstly, the clear water in the pure water tank 5 is used for replacing and discharging the concentrated solution in the first-stage reverse osmosis system through the first flushing valve and the first-stage backflow hand valve 28; e3. after the stock solution in the first-stage reverse osmosis system is replaced, opening the control valve 40 on the first cleaning reserved pipe 36, starting the first high-pressure pump 24 to enable the cleaning solution to completely enter the membrane system through the first cleaning reserved pipe 36, closing the first high-pressure pump 24, soaking for 5-10 minutes, then starting the circulating water pump 29 to circulate for half an hour, and repeating for 3 times; e4. after the cleaning is finished, the primary reverse osmosis membrane main machine 4 is washed once again by replacing the clean water of the pure water tank 5. e5. And closing the control valve 40 on the first cleaning reserved pipe 36 and starting the machine normally. If the effect after cleaning is not obvious after starting the machine, the flow from the cleaning sequence number e1 to the cleaning sequence number e4 is continuously repeated; e6. when the water yield of the secondary reverse osmosis system is reduced, the conductivity is unchanged, and the operating pressure is increased, the secondary reverse osmosis system needs to be cleaned, and the cleaning steps are similar to the cleaning procedure of the primary reverse osmosis system.
In this embodiment, the working principle of the present invention is as follows: by utilizing the reverse osmosis principle, a predetermined pressure is applied to raw water by the first high-pressure pump 24 and the second high-pressure pump 26, water molecules in the raw water are dialyzed by the pressure through an RO membrane (reverse osmosis membrane), and other inorganic salts and the like are trapped by the RO membrane. The stock solution passes through the RO membrane through continuous circulation to reach the concentrated purpose, thereby separate solutes such as water and nickel sulfate in the plating solution, the reverse osmosis membrane on the first-level reverse osmosis membrane host 4 and the second-level reverse osmosis membrane host 9 can intercept more than 99% of the soluble substances outside the water molecule, the full-automatic electroplating nickel waste water zero discharge equipment is suitable for various large, medium and small-sized electroplating waste water production lines with different specifications, the separated fresh water can directly return to the rinsing tank for recycling, the concentrated solution is directly added into the plating bath after being concentrated to a certain concentration, the full-automatic electroplating nickel waste water zero discharge equipment thoroughly changes the traditional electroplating rinsing water treatment process, the rinsing water is recycled effectively and environmentally, the pollution discharge cost and the production cost of enterprises are reduced, and huge economic benefits are created.
The invention is applied to the technical field of electroplating solution recovery treatment.
While the embodiments of the invention have been described in terms of practical embodiments, they are not intended to be limiting and modifications of the embodiments and combinations with other embodiments will be apparent to those of skill in the art in light of the disclosure.
Claims (8)
1. The utility model provides a full-automatic electroplating nickel waste water zero release equipment which characterized in that: the system comprises a primary reverse osmosis system, a secondary reverse osmosis system and an electrical control box, wherein the electrical control box is electrically connected with the primary reverse osmosis system and the secondary reverse osmosis system, and the primary reverse osmosis system comprises a nickel rinsing wastewater tank (1), a water supply pump (2), a primary filter assembly (3), a primary reverse osmosis membrane host (4) and a pure water tank (5) which are sequentially connected; second grade reverse osmosis system is including middle water tank (6), booster pump (7), secondary filter subassembly (8), second grade reverse osmosis membrane host computer (9) and concentrated water tank (10) that connect gradually, the fresh water discharge port of one-level reverse osmosis membrane host computer (4) with pure water case (5) are connected, the concentrated water discharge port of one-level reverse osmosis membrane host computer (4) with middle water tank (6) are connected, the fresh water discharge port of second grade reverse osmosis membrane host computer (9) with nickel rinsing wastewater water tank (1) is connected, the concentrated water discharge port of second grade reverse osmosis membrane host computer (9) with concentrated water tank (10) are connected.
2. The full-automatic zero discharge equipment for waste water of electric nickel plating according to claim 1, characterized in that: a primary pure water three-way valve (11) is arranged between the fresh water discharge port of the primary reverse osmosis membrane host (4) and the pure water tank (5), a primary pressure regulating valve (12), a first conductivity meter (13), a first concentrated water hand valve (14) and a primary concentrated water three-way valve (15) are sequentially arranged between the concentrated water discharge port of the primary reverse osmosis membrane host (4) and the intermediate water tank (6), and the primary pure water three-way valve (11) is connected with a pipeline between the first conductivity meter (13) and the first concentrated water hand valve (14); a secondary pressure regulating valve (16), a second conductivity meter (17), a secondary concentrated water three-way valve (18) and a second concentrated water hand valve (19) are sequentially arranged between a concentrated water discharge port of the secondary reverse osmosis membrane main machine (9) and the concentrated water tank (10), and a third valve port of the secondary concentrated water three-way valve (18) is connected with the intermediate water tank (6).
3. The full-automatic zero discharge equipment for waste water of electric nickel plating according to claim 2, characterized in that: the primary filter assembly (3) comprises an activated carbon filter (20) and a first safety filter (21), a water inlet of the activated carbon filter (20) is connected with the water supply pump (2), a water outlet of the activated carbon filter (20) is connected with a water inlet of the first safety filter (21), a water outlet of the first safety filter (21) is connected with the primary reverse osmosis membrane host (4), and a first water inlet valve (22), a third conductivity meter (23) and a first high-pressure pump (24) are sequentially arranged between the water outlet of the first safety filter (21) and the primary reverse osmosis membrane host (4); the secondary filter component (8) comprises a second security filter, and a second water inlet valve (25) and a second high-pressure pump (26) are sequentially arranged between the second security filter and the secondary reverse osmosis membrane main machine (9).
4. The full-automatic zero discharge equipment for waste water of electric nickel plating according to claim 3, characterized in that: the primary reverse osmosis system further comprises a primary cleaning system, the primary cleaning system comprises a primary flushing valve (27), a primary backflow hand valve (28) and a circulating water pump (29), the primary flushing valve (27) is connected with a concentrated water discharge port of the primary reverse osmosis membrane main machine (4), the circulating water pump (29) is connected with a pipeline between the first water inlet valve (22) and the first high-pressure pump (24), and the primary flushing valve (27) is connected with the pure water tank (5); the secondary reverse osmosis system further comprises a secondary flushing valve (30), and the secondary flushing valve (30) is installed on a branch pipeline between a concentrated water discharge port of the secondary reverse osmosis membrane main machine (9) and the secondary pressure regulating valve (16).
5. The full-automatic zero discharge equipment for waste water of electric nickel plating according to claim 3, characterized in that: one-level reverse osmosis system still includes one-level backflow subassembly, one-level backflow subassembly including set up in the first level sensor and one-level backflow pipeline (31) of middle water tank (6), the one end of one-level backflow pipeline (31) is connected with one-level dense water three-way valve (15), the other end of one-level backflow pipeline (31) with nickel rinsing wastewater tank (1) is connected.
6. The full-automatic zero discharge equipment for waste water of electric nickel plating according to claim 3, characterized in that: the utility model discloses a water supply pump (2) water outlet department is provided with first manometer (32), one-level backward flow hand valve (28) with be provided with first flowmeter (33) between circulating water pump (29), one-level air-vent valve (12) with be provided with second flowmeter (34) between first dense water hand valve (14), the fresh water discharge port of one-level reverse osmosis membrane host computer (4) with be provided with third conductivity meter (411) between one-level pure water three-way valve (11), second grade air-vent valve (16) with be provided with third flowmeter (35) between second grade dense water three-way valve (18).
7. The full-automatic zero discharge equipment for waste water of electric nickel plating according to claim 3, characterized in that: a first cleaning reserved pipe (36) is arranged between the first water inlet valve (22) and the first high-pressure pump (24), a first cleaning backflow discharge valve port (37) is arranged on the first-stage backflow pipeline (31), a second cleaning reserved pipe (38) is arranged between the second water inlet valve (25) and the second high-pressure pump (26), a second cleaning backflow discharge valve port (39) is arranged on a pipeline between a third valve port of the second-stage concentrated water three-way valve (18) and the intermediate water tank (6), and control valves (40) are arranged on the first cleaning reserved pipe (36) and the second cleaning reserved pipe (38).
8. An operation method of full-automatic electro-nickel plating wastewater zero-discharge equipment is characterized by comprising the following steps:
A. manual operation of the primary system: a1. a switch on a first-stage reverse osmosis system of the electric control box is shifted to a cleaning position; a2. sequentially switching the first water inlet valve (22) and the first-stage flushing valve (27) to manual positions, and switching the first-stage water supply pump (2) to the manual positions after 5 seconds; a3. after the pressure value of the primary return pipeline (32) reaches more than 0.25Mpa, a switch of the first high-pressure pump (24) is switched to a manual position, the primary return hand valve (28) and the first concentrated water hand valve (14) are adjusted, and the return flow on the first flowmeter (33) is confirmed to meet the set parameter value; a4. slowly adjusting a primary pressure regulating valve (12), boosting the pressure to enable a second flowmeter (34) to rise to a set parameter value, and micro-adjusting a primary reflux valve and a first concentrated water hand valve (14) in the process to ensure that the reflux flow is not changed; a5. when the third conductivity meter (411) detects that the conductivity of the produced water is qualified, the switch of the first-stage pure water three-way valve (11) is switched to a manual position; a6. when the first conductivity meter (13) detects that the conductivity of the concentrated water reaches a set value of 15000us/cm, a switch of a first-stage concentrated water three-way valve (15) is switched to a manual position; a7. the shutdown sequence is reverse operation from a serial number a6 to a1, wherein the positions of the primary return hand valve (28), the first concentrated water hand valve (14) and the primary pressure regulating valve (12) are kept unchanged;
B. manual operation of the secondary system: b1. when the intermediate water tank (6) is full of water, a switch on a secondary reverse osmosis system of the electric control box is switched to a cleaning position; b2. the switches of the second water inlet valve (25) and the second-stage flushing valve (30) are switched to a manual position; b, increasing a pump switch to be switched to a manual position after 3.5 seconds, and switching a second high-pressure pump (26) to be switched to the manual position after the inlet pressure of the second-stage concentrated water reaches over 0.25 Mpa; b4. slowly adjusting the secondary pressure regulating valve (16) to a third flow meter (35) to reach set parameters; b5. when the conductivity of the concentrated water of the second conductivity meter (17) reaches a set value of 45000us/cm, a switch of the second-level concentrated water three-way valve (18) is switched to a manual position; b6. the shutdown sequence is reverse operation from sequence number b5 to b 1;
C. the primary system is automatically started and operated: c1. after the manual debugging is finished, the automatic debugging can be started, switches on all the first-stage reverse osmosis systems on the panel in the electrical control box are switched to a water production position, the first-stage reverse osmosis systems automatically run in an automatic mode, and the regulated first-stage return valves, the first concentrated water hand valve (14) and the first-stage pressure regulating valve (12) do not need to be regulated at will after the manual debugging is finished; c2. when the electric control box is shut down, switches on all the first-stage reverse osmosis systems on the inner panel of the electric control box are only required to be shifted to the middle position;
D. the second-level system is automatically started and operated: d1. after the manual debugging is finished, the automatic debugging can be started, all switches on the secondary reverse osmosis systems on the panel in the electrical control box are switched to a water production position, the secondary reverse osmosis systems automatically run in an automatic mode, and the adjusted secondary reflux valves, the second concentrated water hand valve (19) and the secondary pressure regulating valve (16) do not need to be adjusted randomly after the manual debugging is finished; d2. when the electric control box is shut down, all switches on the secondary reverse osmosis systems on the panel in the electric control box are only required to be switched to the middle position.
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