CN112479287A - Method and device for purifying waste liquid and extracting pure water - Google Patents
Method and device for purifying waste liquid and extracting pure water Download PDFInfo
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- CN112479287A CN112479287A CN202011307696.4A CN202011307696A CN112479287A CN 112479287 A CN112479287 A CN 112479287A CN 202011307696 A CN202011307696 A CN 202011307696A CN 112479287 A CN112479287 A CN 112479287A
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- waste liquid
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention is suitable for the technical field of nickel-containing waste liquid treatment, and provides a method for purifying waste liquid and extracting pure water, which comprises the following steps: heating the waste liquid, collecting hot steam generated by the waste liquid, and cooling the hot steam to form purified water; firstly, after the waste liquid is preliminarily heated, the waste liquid is subjected to auxiliary heating by using the heat of hot steam, the hot steam generated by the waste liquid is collected, and the hot steam is cooled to form purified water; secondly, detecting the concentration of the heated waste liquid, and extracting when the concentration of the waste liquid reaches a rated concentration; the purposes of extracting purified water contained in the nickel-containing waste liquid and purifying the nickel-containing waste liquid are achieved; realizes energy conservation and environmental protection, recycles resources repeatedly, and greatly reduces the production cost.
Description
Technical Field
The invention belongs to the technical field of nickel-containing waste liquid treatment, and particularly relates to a method and a device for waste liquid purification and pure water extraction.
Background
The components of the wastewater generated in the electroplating process are very complex, wherein the heavy metal wastewater is a wastewater category with great potential hazard in the electroplating industry, nickel is a heavy metal capable of causing cancer, and the nickel is a more expensive metal resource (the price is 2-4 times of that of copper);
the electroplated nickel is widely applied to electroplating production because of excellent wear resistance, corrosion resistance and weldability, and the processing amount of the electroplated nickel is second to that of galvanizing, and is the second place in the whole electroplating industry;
however, a large amount of nickel-containing wastewater is generated in the nickel plating process, and if the nickel-containing wastewater is not treated and is discharged at will, the nickel-containing wastewater can not only harm the environment and the human health, but also cause the waste of precious metal resources.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a method and an apparatus for purifying waste liquid and extracting purified water, which aims to solve the problems of waste of nickel-containing waste liquid and serious pollution of the ecological environment due to the failure of providing a method for purifying waste liquid and extracting purified water in the prior art.
In one aspect, the present invention provides a method for waste stream purification and purified water extraction, the method comprising the steps of:
heating the waste liquid;
collecting hot steam generated by the waste liquid;
cooling the hot steam to form purified water.
Further preferably, the concentration of the heated waste liquid is detected, and the extraction is performed when the concentration of the waste liquid reaches a rated concentration.
Further preferably, after the waste liquid is preliminarily heated, the waste liquid is secondarily heated by using the heat of the hot steam.
Further, the waste liquid is electroplating nickel-containing waste liquid.
Preferably, the heating the waste liquid comprises: heating the waste liquid to 35 to 50 ℃.
In another aspect, the present invention provides a waste water purification and purified water extraction device, comprising a heating barrel and a cooling device; the heating barrel is internally filled with waste liquid and a heating body for heating the waste liquid, and the heating body heats the waste liquid to form hot steam; the hot steam is conveyed to the cooling device, and the cooling device cools the hot steam to form purified water.
The invention relates to a waste liquid purification and purified water extraction device, wherein a water outlet of a heating barrel is connected with a concentrated liquid recovery tank through a first pipeline;
the heating barrel is internally provided with a concentration detector for detecting the concentration of the waste liquid, and when the concentration of the waste liquid reaches the rated concentration, the concentration detector controls a first valve or a first water pump connected in series on the first pipeline to be opened so as to convey the waste liquid in the heating barrel to the concentrated liquid recovery tank.
The waste liquid purification and purified water extraction device further comprises a cold and hot machine, wherein the cold and hot machine comprises the cooling device and the heating body; the cold-hot machine controls the heating body to primarily heat the waste liquid, and then transfers the heat absorbed by the cooling device to the heating body to perform auxiliary heating on the waste liquid;
the air outlet of the heating barrel is connected with the air inlet of the cooling device, and the cooling device is positioned above the heating barrel; and a water outlet of the cooling device is connected with a purified water recovery box, and the cooling device cools the hot steam to form purified water which is transported into the purified water recovery box.
The waste liquid purification and purified water extraction device further comprises a second water pump and an ejector;
the water inlet of the second water pump is connected with the water outlet of the purified water recovery tank, the water outlet of the second water pump is connected with the water inlet of the ejector, and the water outlet of the ejector is connected with the water inlet of the purified water recovery tank; the water suction port of the ejector is connected with the water outlet of the cooling device;
the second water pump sucks the purified water in the cooling device into the purified water recovery tank through the ejector while circularly pumping and discharging the air or the purified water in the purified water recovery tank.
The waste liquid purification and purified water extraction device further comprises a waste water collection box;
the waste water collecting box is connected with the water inlet of the heating barrel through a second pipeline, and a second valve is also connected in series on the second pipeline; and a liquid level meter is arranged on the heating barrel, and when the liquid level meter detects that the waste liquid in the heating barrel is less than a rated amount, the liquid level meter controls the second valve to open the waste liquid in the waste water collecting box, and the waste liquid is sucked into the heating barrel by the ejector.
The invention has the beneficial effects that: firstly, after the waste liquid is preliminarily heated, the waste liquid is subjected to auxiliary heating by using the heat of hot steam, the hot steam generated by the waste liquid is collected, and the hot steam is cooled to form purified water; secondly, detecting the concentration of the heated waste liquid, and extracting when the concentration of the waste liquid reaches a rated concentration; the purposes of extracting purified water contained in the nickel-containing waste liquid and purifying the nickel-containing waste liquid are achieved; realizes energy conservation and environmental protection, recycles resources repeatedly, and greatly reduces the production cost.
Drawings
FIG. 1 is a flow chart of an implementation of a method for waste liquid purification and purified water extraction according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a waste liquid purification and purified water extraction device provided in the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of specific implementations of the present invention is provided in conjunction with specific embodiments:
examplesFirstly, the method comprises the following steps:
fig. 1 shows a flow of implementing the method for waste liquid purification and purified water extraction provided in the first embodiment of the present invention, and for convenience of description, only the parts related to the first embodiment of the present invention are shown, and detailed descriptions are as follows:
in step S100, the waste liquid is heated;
in the embodiment of the invention, after the waste liquid is subjected to primary heating, the waste liquid is subjected to auxiliary heating by using the heat of hot steam, wherein the waste liquid is heated to 35-50 ℃ to generate the hot steam, so that the waste liquid is ensured not to be changed in quality while water vapor is evaporated; the repeated reutilization of resources is realized, and the energy is saved.
In step S211, hot steam generated from the waste liquid is collected;
in the embodiment of the present invention, the waste liquid is electroplating nickel-containing waste liquid, and the generated hot steam is electroplating distilled water (purified water).
Cooling the hot steam to form purified water in step S212;
in the embodiment of the invention, the purified water can be rapidly collected.
In step S221, the concentration of the heated waste liquid is detected;
in the embodiment of the present invention, the concentration of the waste liquid is ensured to be a reusable concentration.
In step S222, extraction is performed when the concentration of the waste liquid reaches a rated concentration;
in the embodiment of the invention, the rated concentration is that the content of nickel in the waste liquid is more than or equal to 50 g/L.
In the embodiment of the invention, firstly, after the waste liquid is preliminarily heated, the heat of the hot steam is used for carrying out auxiliary heating on the waste liquid, the hot steam generated by the waste liquid is collected, and the hot steam is cooled to form the purified water; secondly, detecting the concentration of the heated waste liquid, and extracting when the concentration of the waste liquid reaches a rated concentration; the purposes of extracting purified water contained in the nickel-containing waste liquid and purifying the nickel-containing waste liquid are achieved; the energy conservation and environmental protection are realized, the resources are repeatedly recycled, and the production cost is greatly reduced.
Example two:
fig. 2 shows the structure of a waste liquid purification and purified water extraction apparatus provided in the second embodiment of the present invention, and for convenience of illustration, only the parts related to the second embodiment of the present invention are shown, which include:
a heating tub 100 and a cooling device 201; the heating barrel 100 is filled with waste liquid and a heating body 202 for heating the waste liquid, and the heating body 202 heats the waste liquid to form hot steam; the hot steam is transmitted to the cooling device 201, and the cooling device 201 cools the hot steam to form purified water; the extraction of the purified water in the waste liquid is realized, the structure is simple, and the cost is low; wherein the cooling device 201 is a condenser.
As shown in fig. 2, the water outlet of the heating barrel 100 is connected to a concentrated solution recovery tank 300 through a first pipe 301;
a concentration detector (not shown) for detecting the concentration of the waste liquid is arranged in the heating barrel 100, and when the concentration of the waste liquid reaches a rated concentration, the concentration detector controls a first valve 302 (electromagnetic valve) or a first water pump (not shown) connected in series on a first pipeline 301 to open so as to convey the waste liquid in the heating barrel 100 into a concentrated liquid recovery tank 300; detecting the nickel content of the wastewater after heating the waste liquid to evaporate the purified water, and ensuring that the concentration meets the requirement of recycling, wherein a first valve 302 or a first water pump is used for meeting the requirements of different space settings; further preferably, the concentrated solution recycling tank 300 is located below the heating barrel 100, the structure is simple, the cost is saved, and the collection of the waste solution in the heating barrel 100 can be realized by directly using the first valve 302 for control.
As shown in fig. 2, the waste liquid purification and purified water extraction device further comprises a cooling and heating machine 200, wherein the cooling and heating machine 200 comprises a cooling device 201 and a heating body 202; after the cold-hot machine 200 controls the heating body 202 to primarily heat the waste liquid, the heat absorbed by the cooling device 201 is transferred to the heating body 202 to secondarily heat the waste liquid; energy conservation and resource recycling are realized;
the air outlet of the heating barrel 100 is connected with the air inlet of the cooling device 201, and the cooling device 201 is positioned above the heating barrel 100, so that the transmission of hot steam is facilitated; the delivery port of cooling device 201 is connected with pure water recovery box 400, and the pure water that cooling device 201 formed after cooling hot steam is defeated to in the pure water recovery box 400, simple structure, wherein, pure water recovery box 400 is located cooling device 201's below to utilize the height drop to realize the collection to the pure water.
As shown in fig. 2, the waste liquid purification and purified water extraction apparatus further includes a second water pump 401 and an ejector 402;
a water inlet of the second water pump 401 is connected with a water outlet of the purified water recovery tank 400, a water outlet of the second water pump 401 is connected with a water inlet of the ejector 402, and a water outlet of the ejector 402 is connected with a water inlet of the purified water recovery tank 400; the water suction port of the ejector 402 is connected with the water outlet of the cooling device 201, wherein the water suction port and the water outlet are connected through a pipeline;
the second water pump 401 sucks the purified water in the cooling device 201 into the purified water recovery tank 400 through the ejector 402 while circularly pumping the air or the purified water in the purified water recovery tank 400, so as to accelerate the collection of the purified water and meet the use requirement of rapid processing.
As shown in fig. 2, the waste liquid purification and purified water extraction apparatus further includes a waste water collection tank 500;
the waste water collecting tank 500 is connected with the water inlet of the heating barrel 100 through a second pipeline 501, and a second valve 502 is also connected in series on the second pipeline 501; the heating barrel 100 is provided with a liquid level meter (not shown in the figure), and when the liquid level meter detects that the waste liquid in the heating barrel 100 is less than a rated amount, the liquid level meter controls the second valve 502 to open so that the waste liquid in the waste water collection tank 500 is sucked into the heating barrel 100 by the ejector 402; the structure is simple, and the waste liquid is sucked from the waste water collecting tank 500 into the heating barrel 100 by utilizing the principle that the second water pump 401 and the ejector 402 pump the cooling device 201 and the heating barrel 100 into negative pressure.
When it is necessary to explain: the suction force generated by the second water pump 401 and the ejector 402 can only suck the hot steam in the heating tub 100 into the cooling device 201 and the waste liquid in the waste water collection tank 500 into the heating tub 100; wherein, the heating barrel 100, the waste water collection box 500 and the purified water recovery box 400 are sealed bodies.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A method for purifying waste liquid and extracting purified water, which is characterized by comprising the following steps:
heating the waste liquid;
collecting hot steam generated by the waste liquid;
cooling the hot steam to form purified water.
2. The method of claim 1, wherein the method further comprises:
and detecting the concentration of the heated waste liquid, and extracting when the concentration of the waste liquid reaches the rated concentration.
3. The method of claim 1, wherein the method further comprises:
and after the waste liquid is subjected to primary heating, the waste liquid is subjected to auxiliary heating by using the heat of the hot steam.
4. The method of claim 1, wherein the waste stream is a nickel-containing electroplating waste stream.
5. The method of claim 4, wherein heating the waste stream comprises: heating the waste liquid to 35 to 50 ℃.
6. A waste liquid purification and purified water extraction device comprises a heating barrel and a cooling device; the heating device is characterized in that a waste liquid and a heating body for heating the waste liquid are contained in the heating barrel, and the heating body heats the waste liquid to form hot steam; the hot steam is conveyed to the cooling device, and the cooling device cools the hot steam to form purified water.
7. The apparatus for purifying waste liquid and extracting purified water according to claim 6, wherein the water outlet of the heating barrel is connected to a concentrate recovery tank through a first pipe;
the heating barrel is internally provided with a concentration detector for detecting the concentration of the waste liquid, and when the concentration of the waste liquid reaches the rated concentration, the concentration detector controls a first valve or a first water pump connected in series on the first pipeline to be opened so as to convey the waste liquid in the heating barrel to the concentrated liquid recovery tank.
8. The spent liquor purification and purified water extraction apparatus according to claim 6, further comprising a cooling-heating machine including the cooling device and the heating body; the cold-hot machine controls the heating body to primarily heat the waste liquid, and then transfers the heat absorbed by the cooling device to the heating body to perform auxiliary heating on the waste liquid;
the air outlet of the heating barrel is connected with the air inlet of the cooling device, and the cooling device is positioned above the heating barrel; and a water outlet of the cooling device is connected with a purified water recovery box, and the cooling device cools the hot steam to form purified water which is transported into the purified water recovery box.
9. The spent liquor purification and purified water extraction apparatus of claim 8 further comprising a second water pump and ejector;
the water inlet of the second water pump is connected with the water outlet of the purified water recovery tank, the water outlet of the second water pump is connected with the water inlet of the ejector, and the water outlet of the ejector is connected with the water inlet of the purified water recovery tank; the water suction port of the ejector is connected with the water outlet of the cooling device;
the second water pump sucks the purified water in the cooling device into the purified water recovery tank through the ejector while circularly pumping and discharging the air or the purified water in the purified water recovery tank.
10. The spent liquor purification and purified water extraction apparatus of claim 6 further comprising a spent liquor collection tank;
the waste water collecting box is connected with the water inlet of the heating barrel through a second pipeline, and a second valve is also connected in series on the second pipeline; and a liquid level meter is arranged on the heating barrel, and when the liquid level meter detects that the waste liquid in the heating barrel is less than a rated amount, the liquid level meter controls the second valve to open the waste liquid in the waste water collecting box, and the waste liquid is sucked into the heating barrel by the ejector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011307696.4A CN112479287A (en) | 2020-11-19 | 2020-11-19 | Method and device for purifying waste liquid and extracting pure water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011307696.4A CN112479287A (en) | 2020-11-19 | 2020-11-19 | Method and device for purifying waste liquid and extracting pure water |
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| CN112479287A true CN112479287A (en) | 2021-03-12 |
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| CN202011307696.4A Pending CN112479287A (en) | 2020-11-19 | 2020-11-19 | Method and device for purifying waste liquid and extracting pure water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147015A (en) * | 2021-11-26 | 2022-03-08 | 苏州普瑞得电子有限公司 | Cleaning device for liquid in surface treatment tank |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201288071Y (en) * | 2008-09-28 | 2009-08-12 | 华维根 | Vacuum distillation wastewater treatment device |
| CN101830592A (en) * | 2010-05-11 | 2010-09-15 | 吴志文 | Nickel-containing washing waste water recycling treatment system |
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2020
- 2020-11-19 CN CN202011307696.4A patent/CN112479287A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201288071Y (en) * | 2008-09-28 | 2009-08-12 | 华维根 | Vacuum distillation wastewater treatment device |
| CN101830592A (en) * | 2010-05-11 | 2010-09-15 | 吴志文 | Nickel-containing washing waste water recycling treatment system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147015A (en) * | 2021-11-26 | 2022-03-08 | 苏州普瑞得电子有限公司 | Cleaning device for liquid in surface treatment tank |
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Application publication date: 20210312 |