CN1105653A - Utilization and treatment method for industrial waste water - Google Patents
Utilization and treatment method for industrial waste water Download PDFInfo
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- CN1105653A CN1105653A CN 94100319 CN94100319A CN1105653A CN 1105653 A CN1105653 A CN 1105653A CN 94100319 CN94100319 CN 94100319 CN 94100319 A CN94100319 A CN 94100319A CN 1105653 A CN1105653 A CN 1105653A
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- waste water
- brick
- trade effluent
- sintering
- heavy metal
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Abstract
The present invention belongs to the field of industrial waste water treatment. It adopts a method integrating its utilization and treatment into one body, i.e. all discharged waste water is used for making brick, and the harmful heavy metal elements, cyanides, biochemicals in the waste water and various organic waste waters are decomposed, volatilized and solutionzed in bricks and tiles by using such processes of mixing, making blank, drying in the air and sintering of brick-making technology. As compared with existent techniques, it not only is simple in method, has no need of special investment, but also basically can implement zero discharge of industrial waste water, and solves the problem of toxicity accumulated by harmful heavy metal elements in natural environment.
Description
The invention belongs to technical field of waste water processing, relate to a kind of novel method that the poisonous trade effluent that is difficult for degrading can be utilized processing.
For a long time, the pollution problem of trade effluent is troubling business circles and environmental management department always.The township and village enterprises of China is along with industrial expansion, and is more and more in vast rural area, wherein is no lack of big and small Electroplate Factory, chemical plant, paper mill, tannery or the like, makes the pollution industry that concentrated on big or middle city originally to be diffused into vast rural area.The trade effluent place of arrival, fishes and shrimps disappearances, biological death, how sick underground water variable color, the decline of grain dish crop quality, the underproduction, people and animals be, even dead.Although country formulates already and carries out the emission standard of all kinds of waste water, but for various reasons, make the discharge of wastewater pollution problem, especially the pollution problem of township and village enterprises's discharge of wastewater is still very serious, simultaneously, because a lot of contained toxicants of waste water and heavy metal ion are at soil, farm crop, has cumulative toxicity in people's carcass, even enterprise is according to treatment process of the prior art, make waste discharge up to standard, but as long as water still emits, then also can cause potential harm to people and animals and ecotope, and much harm is just to show after many years, one promptly irremediable.In the prior art processing method of industrial waste water is mainly contained air supporting method, electrolytic process, reverse osmosis method, extraction process, chemical precipitation method, absorption method etc., though these methods can make some industrial wastewater discharge up to standard, but all belong to passive treatment process, all need to carry out industrial production improvement investment in addition, and it is big generally all to exist one-time investment, running expense height, complex process, require the high shortcoming of administrative skill level, especially for little factory and township and village enterprises, be difficult to be accepted application.In addition, the most important thing is that aforesaid method all can not fundamentally solve residual heavy metal ion and the accumulation problem of toxic substance in environment and biologic chain in the waste water.
At above-mentioned prior art situation, the objective of the invention is to, a kind of Industrial Wastewater Treatment novel method of not only utilizing but also handling is provided, this method not only can all be digested and assimilated waste water, accomplishes the zero release of trade effluent substantially, and can solve the cumulative toxicity problem of heavy metal ion in physical environment, while method is extremely simple, do not need extra investment, both handled trade effluent, solve the problem of water consumption of brickmaking industry again.
Now design of the present invention and technical solution are described below:
The passive type treatment process of mentioning in the present invention and the above-mentioned prior art is all inequality; it is characterized in that: the inventive method at first is that trade effluent is all utilized as the water resources in the brickmaking industry; in the process of utilizing; make the heavy metal element in the trade effluent; prussiate; biological and all kinds of organic substance by in the brickmaking technology and mud; base; airing; processes such as sintering; make above-mentioned substance progressively reach waste water no longer to the river; the farmland discharging; no longer make heavy metal ion produce cumulative toxicity in medium-term and long-term existence of soil; the protection environment; the balance of conservation of nature circle biologic chain provides the purpose of a large amount of high-quality brick and tile simultaneously for nation-building.
The present invention is that whole waste water are used for and mud to treatment of heavy metal ions such as the copper in the industrial electric degree waste water, zinc, cadmium, nickel.Base, airing were sent into the rotary kiln sintering 24 hours then, sent into the high-temperature zone sintering again 4 hours, temperature is 800-1000 ℃, cooled off 3-4 days, these heavy metal ion are just melted in the middle of common brick basically admittedly, and its molten admittedly effect can be soaked from the sample of lab scale of the present invention, pilot scale and type approval test and be obtained satisfied conclusion the molten test.(see test 1,2,3 and table 1,2).For hexavalent chromium, under above-mentioned sintering condition, its molten admittedly effect is undesirable, and the present invention has then adopted the raising sintering temperature and remained in 1100 ± 20 ℃ seven days, drinks kiln then, sinters blue bricks into.Under this condition, chromic molten admittedly effect is with regard to fairly good (seeing Table 3).For the processing of the prussiate in the waste water in the industry, be when the adobe sintering temperature reaches more than 400 ℃, allow it become nitrogen, hydrogen and carbon dioxide and be discharged through hydrolysis, after decomposing.The transforming degree of prussiate can obtain (seeing Table 2) satisfied answer from cyanide gas sampling analysis result.Analytical results shows, when temperature in the stove of vitrified brick during at 300 ℃, prussiate just is broken down into nitrogen, hydrogen and carbonic acid gas and evaporates, when sintering temperature reaches more than 700 ℃, prussiate has decomposed and has finished, thereby detects the concentration less than above-mentioned three kinds of gases.In order to prove whether gasification is thorough, the present invention has done over one hundred time to the brick behind the sintering again and has soaked molten test, does not all detect.When the cyanide wastewater concentration ratio is higher, can in advance trade effluent be transferred under alkaline condition, adopt electrolytic process to carry out broken cyanide and handle, and then carry out brickmaking and the utilization of mud sintering.For black liquid, little wastewater from chemical industry, biochemical organic waste water, also can adopt same way, it is all utilized and mud, in sintering process, decompose, vaporize or melt in the middle of brick and tile admittedly then in the differing temps section.
Now subordinate list of the present invention and test situation are described as follows:
Test 1: the lab scale condition is handled in electroplating wastewater brickmaking utilization
Table 1: test 1 sample brick and soak molten analytical results table
Table 2: the cyanide gas sampling analysis is table as a result
Test 2: pilot plant conditions is handled in electroplating wastewater brickmaking utilization
Table 3: high-concentration chromium-containing wastewater is made blue bricks, common brick soaks cementing fruit contrast table
Test 3: the type approval test condition is handled in electroplating wastewater brickmaking
Table 4: soak molten medium pH value and soak molten concentration relationship measurement result
Test one:
1. brick earth is selected: Xi'an Dong Xin village brickmaking loess
2. the composition of test water and concentration (mg/l)
Chromium 157.6 prussiates 164.0 bronze medals 70.79
Zinc 30.11 cadmiums 4.32
3. the moulding of adobe and constituent content
Manual base, physical dimension 240 * 120 * 60mm
Natural air drying after the moulding.
The constituent content of adobe (mg/ piece)
Chromium 8.44 bronze medals 26.55 zinc 10.53
Cadmium 1.62 prussiates 12.88
4. agglomerating plant: thermal treatment muffle furnace
5. sintering temperature: 800 ℃-810 ℃
6. time: after being warming up to 800 ℃, keep 800 ℃-810 ℃ 4 hours, stop to send electricity, come out of the stove after 36 hours
7. soak molten test conditions:
A. water consumption: water brick volume ratio 1: 1 or water brick weight ratio 1: 1
B. soak dissolution method: get 2,8,24,72 hour time period
8. little test result
Time soak molten test result according to over one hundred, proved prussiate all vaporizations in sintering process.Each heavy metal element is except that the high chromium concentration test solution, and all the other various elements all can't check or the amount of having only detects.
Test two:
1. test water composition: the actual draining of each plating of Electroplate Factory
Wherein contain: Cr
6+306mg/l CN
-154mg/l
Cu
2+132mg/l Zn
2+47.37mg/l
Ni1404.26mg/l
2. the sintering of brick:
A. blue bricks: sintering temperature is 1100 ℃ ± 20 ℃, and seven days time, back drink kiln cooled off kiln discharge 3-4 days
B. common brick: fire at rotary kiln, burnt 800 ℃-850 ℃ of strong temperature 4 hours
3. soak molten experiment pilot-scale experiment
Soak the same lab scale of molten test conditions.Emphasis is observed the solid burning effect of the hexavalent chromium that is fired into blue bricks and common brick, and the result shows (seeing Table 3) for the dense chromate waste water of height, adopts the effect that sinters blue bricks into fine.
Test three:
1. experimental water: select eyebrow depressed place chemical plant mixing electroplating wastewater for use.Pollutent in the water is mainly: Cr
6+5.12mg/l, CN
-3.29mg/l, Zn
2+0.74mg/l.
2. the mensuration of the production of brick and airing field air prussiate
A. select 39 ℃-40 ℃ of high temperature, sweltering heat, calm weather, temperature
B. sampling analysis result: all do not measure prussiate
3. type approval test brief summary
Result of industrial test and lab scale, pilot-scale experiment are consistent, prove that the objectionable impurities that melts admittedly in brick and tile can not cause secondary pollution.Prussiate test result in adobe airing process shows that at the hot weather of 39 ℃-40 ℃ of natural temperature, prussiate is comparatively stable simultaneously, is difficult for decomposing volatilization, and work situation meets hygienic standard.
The present invention compares with prior art, and not only method is simple, does not need special investment, can accomplish the zero release of trade effluent basically, not only utilizes but also handle, and can not cause secondary pollution, especially is suitable for the midget plant of vast villages and towns in rural areas enterprise.Simultaneously; its maximum superiority has been to solve enrichment and the cumulative toxicity problem of heavy metal ion in environment; reduced the possibility that objectionable impurities enters the animal and plant biologic chain and enters human body by soil, moisture; environment protection and HUMAN HEALTH are had extraordinary meaning, and its economic benefit and social benefit are obvious and far-reaching.
Table 1
| Heavy metal ion | Soak molten water consumption liter/piece PH＞7 | 2 hours | 8 hours | 24 hours | 72 hours | ||||
| Concentration mg/1 | Solubility rate % | Concentration mg/1 | Solubility rate % | Concentration mg/1 | Solubility rate % | Concentration mg/1 | Solubility rate % | ||
| Chromium | 1.75 2.50 | 0.34 high 0.37 low 0.27 high 0.13 is low | 0.08 7.76 1.22 3.85 | 0.62 0.593 0.48 0.241 | 3.01 12.51 2.23 | 0.91 1.12 0.69 | 3.44 24.05 3.29 | 1.20 1.64 0.81 | 4.88 35.45 4.24 |
| Zinc | 1.75 2.50 | Do not detect | 0 0 | Do not detect | 0 0 | 0.14 0.11 | 2.32 2.61 | Do not detect | 0 0 |
| Copper | 1.75 2.50 | Do not detect | 0 0 | Do not detect | 0 0 | 0.015 0.19 | 0.10 0.18 | Do not detect | 0.10 0.18 |
| Cadmium | 1.75 2.50 | Do not detect | 0 0 | Do not detect | 0 0 | 0.008 do not detect | 0.28 0 | 0.009 do not detect | 0.32 0 |
Table 2
| Sampling time | Temperature ℃ in the stove | Analytical results mg/m 2 | Sample number into spectrum |
| 9:30 | 370 | 0.02 | 1 |
| 10:00 | 480 | 0.42 | 2 |
| 10:30 | 555 | 0.23 | 3 |
| 11:00 | 635 | 0.04 | 4 |
| 11:30 | 700 | Do not detect | 5 |
| 12:00 | 780 | ＂ | 6 |
| 12:30 | 790 | ＂ | 7 |
| 13:00 | 800 | ＂ | 8 |
Table 3
| Heavy metal ion | Soak molten water consumption liter/piece PH＞7 | 2 hours | 8 hours | 24 hours | 72 hours | ||||
| Concentration mg/1 | Solubility rate % | Concentration mg/1 | Solubility rate % | Concentration mg/1 | Solubility rate % | Concentration mg/1 | Solubility rate % | ||
| Blue bricks chromium | 1.75 2.50 | Do not detect ＂ | 0 0 | Do not detect ＂ | 0 0 | Do not detect ＂ | 0 0 | Do not detect ＂ | 0 0 |
| The chrome red brick | 7.25 | 16.64 | |||||||
| Zinc | 0.90 | 1.85 | |||||||
| Copper | 0.07 | 0.32 | |||||||
| Nickel | 1.75 2.50 | Do not detect | 0 0 | Do not detect | 0 0 | Do not detect ＂ | 0 0 | Do not detect | 0 0 |
Table 4
| PH value | 3 | 5 | 7 | 9 |
| Soak stripping Cr 3+Ionic concentration mg/1 | 0.07 | 0.04 | 0.02 | 0.02 |
Claims (2)
1, a kind of trade effluent utilizes treatment process, it is characterized in that:
(1) trade effluent is all utilized as the water resources in the brickmaking industry;
(2) by brickmaking technology and mud, base, airing, process such as bake bricks, make in the trade effluent heavy metal element, prussiate, biological and all kinds of organic substance progressively through volatilization, decompose and melt in brick and tile admittedly.
2, utilize New Method for Processing according to the trade effluent described in the claim 1, it is characterized in that: for treatment of heavy metal ions such as the copper in the electroplating wastewater, zinc, cadmium, nickel, be that waste water all is used for brickmaking and mud, behind base, airing, rotary kiln sintering 24 hours, send into 800 ℃-1000 ℃ high-temperature zone sintering 4 hours again, cooled off 3-4 days; For the processing of high-concentration chromium-containing wastewater, be that the high-temperature zone sintering temperature of brick and tile is brought up to 1100 ℃ ± 20 ℃, and in this temperature, kept seven days, drink kiln then, sinter blue bricks into; For the treating method of prussiate in the trade effluent, be that the sintering temperature with brick and tile burns more than 400 ℃, prussiate promptly forms nitrogen, hydrogen and carbon dioxide and is discharged after hydrolysis is decomposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94100319 CN1105653A (en) | 1994-01-18 | 1994-01-18 | Utilization and treatment method for industrial waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94100319 CN1105653A (en) | 1994-01-18 | 1994-01-18 | Utilization and treatment method for industrial waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1105653A true CN1105653A (en) | 1995-07-26 |
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|---|---|---|---|
| CN 94100319 Pending CN1105653A (en) | 1994-01-18 | 1994-01-18 | Utilization and treatment method for industrial waste water |
Country Status (1)
| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999047467A2 (en) * | 1998-03-15 | 1999-09-23 | Holger Fischer | Method for producing sand-lime bricks from lime residues-containing cyanide |
-
1994
- 1994-01-18 CN CN 94100319 patent/CN1105653A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999047467A2 (en) * | 1998-03-15 | 1999-09-23 | Holger Fischer | Method for producing sand-lime bricks from lime residues-containing cyanide |
| WO1999047467A3 (en) * | 1998-03-15 | 1999-12-09 | Holger Fischer | Method for producing sand-lime bricks from lime residues-containing cyanide |
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