CN116514312A - Trivalent chromium passivation rinse water treatment device - Google Patents
Trivalent chromium passivation rinse water treatment device Download PDFInfo
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- CN116514312A CN116514312A CN202310470170.5A CN202310470170A CN116514312A CN 116514312 A CN116514312 A CN 116514312A CN 202310470170 A CN202310470170 A CN 202310470170A CN 116514312 A CN116514312 A CN 116514312A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000011651 chromium Substances 0.000 title claims abstract description 23
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 19
- 238000002161 passivation Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000003860 storage Methods 0.000 claims abstract description 30
- 239000010865 sewage Substances 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims description 21
- 238000005303 weighing Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 85
- 239000002351 wastewater Substances 0.000 abstract description 36
- 229910052742 iron Inorganic materials 0.000 abstract description 33
- 238000009713 electroplating Methods 0.000 abstract description 27
- 239000002244 precipitate Substances 0.000 abstract description 15
- 238000004065 wastewater treatment Methods 0.000 abstract description 5
- 239000010842 industrial wastewater Substances 0.000 abstract description 3
- 239000013049 sediment Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 17
- 238000006243 chemical reaction Methods 0.000 description 12
- 238000003825 pressing Methods 0.000 description 12
- 239000012528 membrane Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 238000001471 micro-filtration Methods 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 8
- -1 iron ions Chemical class 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009194 climbing Effects 0.000 description 3
- 235000014413 iron hydroxide Nutrition 0.000 description 3
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229960004887 ferric hydroxide Drugs 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/484—Treatment of water, waste water, or sewage with magnetic or electric fields using electromagnets
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a trivalent chromium passivation rinse water treatment device in the technical field of industrial wastewater treatment, which comprises a pretreatment mechanism and a plate-and-frame filter press, wherein the pretreatment mechanism comprises a body, and a sewage disposal area, a treatment area and a clear water area are sequentially arranged in the body from left to right; and an inclined guide slope is arranged in the body; the sewage disposal area is internally connected with an inclined lifting mechanism, and one end of the lifting mechanism, which is far away from the body, is positioned above the plate-and-frame filter press; the top of the body is communicated with a storage box; the water inlet area is communicated with a liquid outlet pipe, and the liquid outlet pipe is positioned at one side of the body far away from the sewage disposal area; the bottom of the plate-and-frame filter press is communicated with a liquid return pipe, one end of the liquid return pipe, which is far away from the plate-and-frame filter press, is communicated with the top of the treatment area, and the top of the treatment area is also communicated with a liquid inlet pipe; forming a precipitate by injecting electroplating wastewater to be treated and iron dust and iron powder of scrap iron into the treatment area; even if the inclined guide slope is convenient for the wastewater to be discharged from the liquid outlet pipe, the precipitate is convenient to be transported to the plate-and-frame filter press through the lifting mechanism, so that the treatment cost is reduced, and the resource utilization rate is improved.
Description
Technical Field
The invention belongs to the technical field of industrial wastewater treatment, and particularly relates to a trivalent chromium passivation rinse water treatment device.
Background
In the production process of electroplating industry, electroplating wastewater containing Cr heavy metal ions is generated, and if the electroplating wastewater is directly discharged without treatment, serious harm is brought to the surrounding environment and human health. The existing electroplating wastewater treatment method mainly comprises the following steps: chemical method, membrane separation technology, ion exchange method, etc., wherein the ion exchange method is not applicable to industrial wastewater with large water content due to high operation cost and high material cost; the chemical method is often combined with a membrane separation technology as a main stream method for treating electroplating wastewater because of the advantages of low operation cost, good treatment effect and simple operation and management.
For example, chinese patent publication No. CN205347082U discloses a trivalent chromium passivation electroplating rinse water treatment system, which combines a chemical treatment method, microfiltration, reverse osmosis, nanofiltration and an evaporator, and uses a microfiltration system to separate a mud-water mixture, so that the floor area of the equipment is effectively reduced; the membrane system is used for concentrating wastewater, pure water is recycled to the rinsing tank, industrial water is saved to a great extent, production and operation costs are reduced, and meanwhile, the system only finally generates dehydrated sludge and evaporated crystals, so that the pollutant discharge amount is small, and a certain recovery value is realized.
However, this scheme is in the in-process of handling the mud water mixture after the coagulation reaction, pumps the mud water mixture into the microfiltration membrane device through the microfiltration booster pump, and the rethread microfiltration membrane device filters, and the operating pressure of microfiltration booster pump and microfiltration membrane device is big, and the microfiltration membrane device is in long-term use, causes the jam easily, leads to the filter effect to reduce.
Disclosure of Invention
The invention aims to provide a trivalent chromium passivation rinse water treatment device which is convenient for separating sediment from wastewater, reduces treatment cost and improves resource utilization rate.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the trivalent chromium passivation rinse water treatment device comprises a pretreatment mechanism and a plate-and-frame filter press, wherein the pretreatment mechanism comprises a body, a plurality of partition boards are fixedly connected in the body, and the partition boards divide the interior of the body into a sewage draining area, a treatment area and a clean water area in sequence from left to right; the body is internally provided with an inclined guide slope, one side of the guide slope, which is close to the sewage disposal area, is lower than one side of the guide slope, which is far away from the clean water area, and the guide slope is fixedly connected with the bottom of the body;
a lifting mechanism is arranged in the sewage disposal area, one side of the lifting mechanism is provided with an opening, and the lifting mechanism is communicated with the sewage disposal area through the opening; one end of the lifting mechanism penetrates through one side of the body, one end of the lifting mechanism, which is far away from the body, is positioned above the plate-and-frame filter press, and one end of the lifting mechanism, which is far away from the body, is higher than one end of the lifting mechanism, which is close to the body;
the top of the body is fixedly connected with a funnel-shaped storage box, the bottom of the storage box is communicated with the treatment area, an inner shell is placed in the storage box, a plurality of weighing sensors, for example, weighing sensors with the model number of HM14C-C3-20t-13B6, are arranged between the inner shell and the storage box, and a processor is connected outside the weighing sensors; the partition board is provided with a first connecting port and a second connecting port respectively, the first connecting port is positioned between the treatment area and the sewage disposal area, the second connecting port is positioned between the treatment area and the clear water area, and the first connecting port is positioned above the second connecting port; the partition board is provided with an electric gate, and the second connecting port is sealed through the electric gate;
the water inlet area is communicated with a liquid outlet pipe, and the liquid outlet pipe is positioned at one side of the body far away from the sewage disposal area;
the bottom of the plate-and-frame filter press is communicated with a liquid return pipe, one end of the liquid return pipe, which is far away from the plate-and-frame filter press, is communicated with the top of the treatment area, the top of the treatment area is also communicated with a liquid inlet pipe, the liquid inlet pipe is positioned on one side, which is far away from the first connecting port, of the treatment area, and a flow sensor is communicated in the liquid inlet pipe and is electrically connected with the processor.
After the scheme is adopted, the following beneficial effects are realized: (1) Firstly, pour into the electroplating wastewater to be treated into the treatment area through the feed liquor pipe, rethread storage case is thrown in the iron fillings iron powder to the treatment area, the treater gathers the liquid flow who carries into the treatment area through flow sensor, the treater rethread weighing sensor monitors the weight of iron fillings iron powder that adds for the added amount of iron fillings iron powder matches with the added amount of electroplating wastewater to be treated, avoids iron fillings iron powder to add too much and causes the problem that electroplating wastewater treatment effect is not good with insufficient iron fillings iron powder addition, makes the electroplating wastewater to be treated react more fully with iron fillings iron powder, through the coacervation of the ferric hydroxide that the reaction formed, the sedimentation of precipitants such as chromium hydroxide of being convenient for.
(2) After the reaction of iron filings and electroplating wastewater to be treated is completed, the sediment is convenient to move to the sewage disposal area through the inclined guide slope, the sediment content of wastewater in the clear water area is reduced, the subsequent filtering of wastewater is convenient, and the pressure born by a filtering membrane in the filtering process is reduced.
(3) Through electric valve, the precipitate that forms in the treatment zone of being convenient for removes to in the blowdown district because of self gravity, in can transporting the precipitate in the blowdown district to the board frame filter-pressing mechanism through slope climbing mechanism, also can make the waste water in the climbing mechanism flow back to the blowdown district in, reduce the water content of collecting the precipitate in the board frame filter-pressing mechanism to reduce processing cost, improve resource utilization.
Further, a plurality of electromagnetic areas are circumferentially arranged on the inner wall of the body, and the electromagnetic areas are located in the treatment area.
The beneficial effects are that: the iron powder of iron filings and the residual substances in the electroplating wastewater to be treated generate chemical reaction to form compounds containing iron ions, the magnetic field force of the electromagnetic area can attract the compounds containing iron ions, the compounds containing iron ions can gather the precipitate formed by metal chromium conveniently, the precipitation is accelerated, and the separation of the precipitate and the wastewater is facilitated.
Further, the check valve is arranged below the first connecting port and fixedly connected to the bottom of the partition plate, and the clear water area is communicated with the treatment area through the check valve.
The beneficial effects are that: the one-way valve only enables water flow of the clear water zone to flow to the treatment zone, and the one-way valve facilitates sediment at the bottom of the clear water zone to flow to the treatment zone, so that water flow in the clear water zone is clearer.
Further, the electric gate comprises a driving piece, an output shaft of the driving piece is coaxially connected with a roller, a pull rope is fixedly connected to the roller, the pull rope penetrates through the partition plate and is in sliding fit with the partition plate, and one end, far away from the roller, of the pull rope is fixedly connected with a baffle plate; the baffle is in sliding fit with the baffle, the bottom of the baffle props against the guide slope, a right triangle matching groove is formed in the guide slope, and the baffle is placed in the matching groove.
The beneficial effects are that: the driving piece is a common motor, the driving piece drives the roller to rotate, the pull rope is stored or loosened through the roller, the pull rope is convenient to pull the baffle plate to contact with the guide slope, and accordingly the opening and closing of the second connecting port are controlled, and sediment in a treatment area is convenient to form and discharge.
Further, the liquid return pipe is communicated with a booster pump.
The beneficial effects are that: the booster pump can provide power to facilitate the liquid to be conveyed from the plate-and-frame filter press into the pretreatment mechanism.
Further, the side of climbing mechanism that keeps away from the opening fixedly connected with filter screen, filter screen and opening are not in same horizontal plane, and the filter screen is located the blowdown district.
The beneficial effects are that: the filter screen is convenient for the waste water in the lifting mechanism to pass through, so that the waste water in the lifting mechanism flows back to the sewage disposal area, and the waste water content in sediment in the plate-and-frame filter press is reduced; the filter screen enables sediment in the lifting mechanism to be left in the lifting mechanism, so that the lifting mechanism can conveniently transport the sediment to the upper part of the plate-and-frame filter press.
Further, a plurality of support frames are fixedly connected between the storage box and the top of the body.
The beneficial effects are that: the support frame can provide a support, is convenient for with storage case fixed connection on the body.
Furthermore, a connecting pipe is communicated with the center of the bottom of the storage box, and a plugboard penetrates through one side of the connecting pipe.
The beneficial effects are that: the plugboard enables the scrap iron powder to be accumulated in the inner shell, is convenient for a weighing sensor to measure, and is also convenient for controlling the storage box to discharge the scrap iron powder through the connecting pipe.
Drawings
FIG. 1 is a schematic diagram showing connection of a trivalent chromium passivation rinse water treatment device according to an embodiment of the invention.
Fig. 2 is a cross-sectional view of the preconditioning mechanism of fig. 1.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the pretreatment mechanism 1, the guide slope 11, the electromagnetic area 12, the pollution discharge area 13, the treatment area 14, the clear water area 15, the first connecting port 16, the one-way valve 17, the second connecting port 18, the lifting mechanism 2, the opening 21, the filter screen 22, the plate-frame filter pressing mechanism 3, the liquid return pipe 4, the booster pump 41, the liquid outlet pipe 5, the storage box 6, the plugboard 61, the inner shell 62, the weighing sensor 63, the electric gate 7, the baffle 71, the matching groove 72 and the liquid inlet pipe 8.
An example is substantially as shown in figures 1 and 2: the trivalent chromium passivation rinse water treatment device comprises a pretreatment mechanism 1 and a plate-and-frame filter pressing mechanism 3, wherein the pretreatment mechanism 1 comprises a body, a plurality of partition boards are fixedly connected in the body, and the partition boards divide the interior of the body into a sewage draining area 13, a treatment area 14 and a clear water area 15 in sequence from left to right; the body is internally provided with an inclined guide slope 11, one side of the guide slope 11, which is close to the sewage disposal area 13, is lower than one side of the guide slope 11, which is far away from the clear water area 15, and the guide slope 11 is fixedly connected with the bottom of the body;
the sewage draining area 13 is internally provided with a lifting mechanism 2, one side of the lifting mechanism 2 is provided with an opening 21, and the lifting mechanism 2 is communicated with the sewage draining area 13 through the opening 21; one end of the lifting mechanism 2 penetrates through one side of the body, one end of the lifting mechanism 2 away from the body is positioned above the plate frame filter pressing mechanism 3, and one end of the lifting mechanism 2 away from the body is higher than one end of the lifting mechanism 2 close to the body;
the top of the body is fixedly connected with a funnel-shaped storage box 6, the bottom of the storage box 6 is communicated with the treatment area 14, an inner shell 62 is placed in the storage box 6, a plurality of weighing sensors 63 are arranged between the inner shell 62 and the storage box 6, the weighing sensors 63 are fixedly connected to the inner wall of the storage box 6, one end, far away from the storage box 6, of each weighing sensor 63 is propped against the inner shell 62, and a processor is externally connected with each weighing sensor 63; the partition plate is provided with a first connecting port 16 and a second connecting port 18 respectively, the first connecting port 16 is positioned between the treatment area 14 and the sewage disposal area 13, the second connecting port 18 is positioned between the treatment area 14 and the clear water area 15, and the first connecting port 16 is positioned obliquely above the second connecting port 18; the partition plate is provided with an electric gate 7, and the second connecting port 18 is sealed by the electric gate 7;
the water inlet area is communicated with a liquid outlet pipe 5, and the liquid outlet pipe 5 is positioned at one side of the body far away from the sewage disposal area 13;
the bottom of the plate-and-frame filter pressing mechanism 3 is communicated with a liquid return pipe 4, one end of the liquid return pipe 4, which is far away from the plate-and-frame filter pressing mechanism 3, is communicated with the top of the treatment area 14, the top of the treatment area 14 is also communicated with a liquid inlet pipe 8, the liquid inlet pipe 8 is positioned on one side, which is far away from the first connecting port 16, of the treatment area 14, and a flow sensor, such as a flow sensor with the model of LDG-MIK-QP, is communicated in the liquid inlet pipe 8 and is electrically connected with the processor.
The specific implementation process is as follows:
firstly, the second connecting port 18 is closed through the electric gate 7, electroplating wastewater to be treated is injected into the treatment area 14 through the liquid inlet pipe 8, so that the water level of the electroplating wastewater to be treated in the treatment area 14 does not exceed the first connecting port 16 temporarily, the inside of the treatment area 14 is in a relatively sealed environment, the fluidity of water flow in the treatment area 14 is reduced, and the reaction of iron filings and the electroplating wastewater to be treated is facilitated; after the electroplating wastewater to be treated reacts with the iron powder of the scrap iron for a period of time, the electroplating wastewater to be treated is injected into the treatment area 14 through the liquid inlet pipe 8, so that the water level of the electroplating wastewater to be treated in the treatment area 14 exceeds the first connecting port 16.
The liquid flow in the processing area 14 is collected through carrying into to the treater, again artifical interpolation iron fillings iron powder is to in the inner shell 62 to make the storage box 6 keep sealed, the weight of treater rethread weighing sensor 63 to the iron fillings iron powder of interpolation is monitored, make the addition of iron fillings iron powder match with the addition of waiting to handle electroplating effluent, avoid the iron fillings iron powder to add too much and cause extravagant and the iron fillings iron powder addition not enough causes electroplating effluent treatment effect not good problem, make waiting to handle electroplating effluent and iron fillings iron powder reaction more abundant, reduce processing cost, improve resource utilization.
Then the storage box 6 is opened manually to put iron dust and iron powder into the treatment area 14 for coagulation reaction; the iron powder of the scrap iron has the advantages of easily available raw materials, low price and good economic benefit; because the scrap iron contains impurities, the potential of the scrap iron is different from that of iron, the iron is dissolved as an anode, electrons are given out to become ferrous ions, and the electrons are transferred to a cathode and are then transferred to Cr 2 O 7 2- And H+ acceptation to Cr 3+ And H 2 The bivalent iron ion generated by the cathode crosses Cr 2 O 7 2- And (5) reduction.
Because too much acid is consumed in the reaction of the iron powder of the scrap iron and the electroplating wastewater, the PH value is continuously increased along with the progress of the reaction, so that Fe is precipitated as ferric hydroxide. Iron hydroxide generated by the reaction of iron filings and electroplating wastewater is a coagulant, and precipitates such as chromium hydroxide and the like are precipitated together with the iron hydroxide by the aggregation of the iron hydroxide on the precipitates such as chromium hydroxide and the like, so that the precipitates such as chromium hydroxide and the like floating in the wastewater are reduced, the sedimentation of the precipitates such as chromium hydroxide and the like at last in the electroplating wastewater treatment is facilitated, and the resource utilization rate is improved.
After the reaction of iron filings and electroplating wastewater to be treated is completed, the electric gate 7 is started, the second connecting port 18 is opened, the inclined guide slope 11 is used for enabling sediment to move to the sewage disposal area 13 due to self gravity, sediment and supernatant in wastewater after being convenient for treatment are separated, sediment content in supernatant in the clear water area 15 is reduced, the subsequent microfiltration membrane device is convenient for filtering the supernatant, the pressure of a filter membrane in the filtration process is reduced, and the filtration process is convenient for.
The inclined lifting mechanism 2 can transport sediment in the sewage draining area 13 into the plate-and-frame filter pressing mechanism 3, and can enable waste water in the lifting mechanism 2 to flow back into the sewage draining area 13, so that the water content of the sediment collected in the plate-and-frame filter pressing mechanism 3 is reduced, the plate-and-frame filter pressing mechanism 3 is convenient to compress the sediment, the treatment cost is reduced, and the resource utilization rate is improved.
Example 2
Unlike the previous embodiment, a plurality of electromagnetic zones 12 are circumferentially disposed on the inner wall of the body, the electromagnetic zones 12 being bonded to the body, the electromagnetic zones 12 including, but not limited to, an electromagnet of type H1508050, the electromagnetic zones 12 being located within the treatment zone 14.
The specific implementation process is as follows: the iron powder of iron filings and the residual substances in the electroplating wastewater to be treated generate chemical reaction to form compounds containing iron ions, the magnetic field force of the electromagnetic area 12 can attract the compounds containing iron ions, the compounds containing iron ions are convenient to wrap the precipitate formed by the metal chromium, and the weight of the aggregated precipitate is increased to accelerate the precipitation of the precipitate, so that the separation of the precipitate and the wastewater is convenient.
Example 3
The difference from the above embodiment is that a one-way valve 17 is arranged below the first connection port 16, the one-way valve 17 is clamped on the bottom of the partition, and the clean water area 15 is communicated with the treatment area 14 through the one-way valve 17.
The specific implementation process is as follows: the one-way valve 17 only enables the water flow of the clean water area 15 to flow to the treatment area 14, the one-way valve 17 facilitates the sediment at the bottom of the clean water area 15 to flow to the treatment area 14, so that the water flow in the clean water area 15 is clearer, and the pressure of the filtering membrane in the subsequent filtering process is reduced.
Example 4
The difference from the above embodiment is that the electric gate 7 includes a driving member, the output shaft of the driving member is coaxially welded with a roller, a pull rope is welded on the roller, the pull rope penetrates through the partition plate and is in sliding fit with the partition plate, and a baffle 71 is adhered to one end of the pull rope away from the roller; the baffle 71 is in sliding fit with the baffle, the bottom of the baffle 71 is propped against the guide slope 11, a right triangle matching groove 72 is formed in the guide slope 11, and the baffle 71 is placed in the matching groove 72.
The specific implementation process is as follows: the driving piece is a common motor, the driving piece drives the roller to rotate, the pull rope is stored or loosened by the roller, so that the pull rope pulls the baffle 71 to be contacted with the guide slope 11, the second connection port 18 is controlled to be opened and closed, and sediment in the treatment area 14 is formed and discharged conveniently; the right-angled triangular mating groove 72 facilitates smooth placement of the baffle 71 on the guide ramp 11.
Example 5
The difference from the above embodiment is that the liquid return pipe 4 is connected with a booster pump 41.
The specific implementation process is as follows: the booster pump 41 can provide power to facilitate the transfer of liquid from the plate and frame filter press mechanism 3 into the pretreatment mechanism 1.
Example 6
The difference from the above embodiment is that the side of the lifting mechanism 2 away from the opening 21 is clamped with the filter screen 22, the filter screen 22 and the opening 21 are not on the same horizontal plane, and the filter screen 22 is located in the sewage draining area 13.
The specific implementation process is as follows: the filter screen 22 facilitates the waste water in the lifting mechanism 2 to pass through, so that the waste water in the lifting mechanism 2 flows back into the sewage disposal area 13, and the waste water content in sediment in the plate-and-frame filter pressing mechanism 3 is reduced; the filter screen 22 enables sediment in the lifting mechanism 2 to be left in the lifting mechanism 2, so that the lifting mechanism 2 can conveniently transport the sediment to the upper part of the plate-and-frame filter pressing mechanism 3.
Example 7
The difference from the above embodiment is that a plurality of supporting frames are welded between the storage box 6 and the top of the body.
The specific implementation process is as follows: the support frame can provide a support to the storage box 6, is convenient for with storage box 6 fixed connection on the body.
Example 8
The difference from the above embodiment is that a connecting pipe is connected to the bottom center of the storage tank 6, and a plugboard 61 is connected to the connecting pipe.
The specific implementation process is as follows: the plugboard 61 can enable the iron powder to be accumulated in the inner shell 62, is convenient for the weighing sensor 63 to measure, and is also convenient for controlling the storage box 6 to discharge the iron powder through the connecting pipe.
The foregoing is merely exemplary of the present invention and the specific structures and/or characteristics of the present invention that are well known in the art have not been described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. Trivalent chromium passivation rinse water processing apparatus, its characterized in that: the device comprises a pretreatment mechanism and a plate-and-frame filter press, wherein the pretreatment mechanism comprises a body, a plurality of partition boards are fixedly connected in the body, and the partition boards divide the interior of the body into a sewage disposal area, a treatment area and a clear water area in sequence from left to right; the body is internally provided with an inclined guide slope, one side of the guide slope, which is close to the sewage disposal area, is lower than one side of the guide slope, which is far away from the clean water area, and the guide slope is fixedly connected with the bottom of the body;
a lifting mechanism is arranged in the sewage disposal area, one side of the lifting mechanism is provided with an opening, and the lifting mechanism is communicated with the sewage disposal area through the opening; one end of the lifting mechanism penetrates through one side of the body, one end of the lifting mechanism, which is far away from the body, is positioned above the plate-and-frame filter press, and one end of the lifting mechanism, which is far away from the body, is higher than one end of the lifting mechanism, which is close to the body;
the top of the body is fixedly connected with a funnel-shaped storage box, the bottom of the storage box is communicated with the treatment area, an inner shell is placed in the storage box, a plurality of weighing sensors are arranged between the inner shell and the storage box, and the weighing sensors are externally connected with a processor; the partition board is provided with a first connecting port and a second connecting port respectively, the first connecting port is positioned between the treatment area and the sewage disposal area, the second connecting port is positioned between the treatment area and the clear water area, and the first connecting port is positioned above the second connecting port; the partition board is provided with an electric gate, and the second connecting port is sealed through the electric gate;
the water inlet area is communicated with a liquid outlet pipe, and the liquid outlet pipe is positioned at one side of the body far away from the sewage disposal area;
the bottom of the plate-and-frame filter press is communicated with a liquid return pipe, one end of the liquid return pipe, which is far away from the plate-and-frame filter press, is communicated with the top of the treatment area, the top of the treatment area is also communicated with a liquid inlet pipe, the liquid inlet pipe is positioned on one side, which is far away from the first connecting port, of the treatment area, and a flow sensor is communicated in the liquid inlet pipe and is electrically connected with the processor.
2. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: a plurality of electromagnetic areas are circumferentially arranged on the inner wall of the body, and the electromagnetic areas are positioned in the treatment area.
3. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: the check valve is arranged below the first connecting port and fixedly connected to the bottom of the partition plate, and the clear water area is communicated with the treatment area through the check valve.
4. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: the electric gate comprises a driving piece, an output shaft of the driving piece is coaxially connected with a roller, a pull rope is fixedly connected to the roller, the pull rope penetrates through the partition plate and is in sliding fit with the partition plate, and one end, far away from the roller, of the pull rope is fixedly connected with a baffle plate; the baffle is in sliding fit with the baffle, the bottom of the baffle props against the guide slope, a right triangle matching groove is formed in the guide slope, and the baffle is placed in the matching groove.
5. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: the liquid return pipe is communicated with a booster pump.
6. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: one side of the lifting mechanism away from the opening is fixedly connected with a filter screen, the filter screen and the opening are not on the same horizontal plane, and the filter screen is positioned in the sewage disposal area.
7. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: a plurality of supporting frames are fixedly connected between the storage box and the top of the body.
8. The trivalent chromium passivation rinse water treatment device of claim 1, wherein: a connecting pipe is communicated with the center of the bottom of the storage box, and a plugboard penetrates through one side of the connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310470170.5A CN116514312A (en) | 2023-04-27 | 2023-04-27 | Trivalent chromium passivation rinse water treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310470170.5A CN116514312A (en) | 2023-04-27 | 2023-04-27 | Trivalent chromium passivation rinse water treatment device |
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| CN116514312A true CN116514312A (en) | 2023-08-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117357963A (en) * | 2023-12-07 | 2024-01-09 | 山西亿通源制造设备有限公司 | Belt type solid-liquid separation device |
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- 2023-04-27 CN CN202310470170.5A patent/CN116514312A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117357963A (en) * | 2023-12-07 | 2024-01-09 | 山西亿通源制造设备有限公司 | Belt type solid-liquid separation device |
| CN117357963B (en) * | 2023-12-07 | 2024-02-20 | 山西亿通源制造设备有限公司 | Belt type solid-liquid separation device |
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