CN102249438A - Method and equipment for using aluminum-containing wastewater as circulating cooling water - Google Patents
Method and equipment for using aluminum-containing wastewater as circulating cooling water Download PDFInfo
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- CN102249438A CN102249438A CN2010101805495A CN201010180549A CN102249438A CN 102249438 A CN102249438 A CN 102249438A CN 2010101805495 A CN2010101805495 A CN 2010101805495A CN 201010180549 A CN201010180549 A CN 201010180549A CN 102249438 A CN102249438 A CN 102249438A
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Abstract
The invention relates to a method and equipment for using aluminum-containing wastewater as circulating cooling water. The method and the equipment are used for recycling the aluminum-containing wastewater which contains aluminum ions and a small amount of organic matter and of which the aluminum ion concentration is 10mg/L to 1g/L; the method comprises the following steps of: adjusting the pH value of wastewater to be 7.5, and coagulating aluminum ions in the wastewater; allowing wastewater to pass through a filter to filter coagulated aluminum, and biological clay in the wastewater to ensure that the aluminum content in the wastewater is reduced to less than 3mg/L; inputting the filtered wastewater into a circulating cooling water system; and injecting ozone into the circulating cooling water system and performing water treatment to degrade the organic matter in water.
Description
Technical field
The present invention relates to the technology of wastewater treatment and cleaner production, especially relate to the method and apparatus of aluminium wastewater as the make up water of recirculating cooling water system.
Background technology
For entire society, industry is the rich and influential family of town water always, and in China, annual industrial water consumption is about 1,100 hundred million m
3, wherein industrial circulating cooling water directly with tap water water as a supplement, accounts for 70% of industrial water consumption, and this had increased very big pressure for original just nervous water resources.Therefore, second water source of searching recirculated cooling water except that tap water is very great for the meaning of water saving.
In the prior art, adopt membrane technique that waste water is carried out pre-treatment waste water recycling to recirculating cooling water system, but the practical engineering application experience learns that employing membrane technique cost is big, and the work-ing life of film is short, the operation expense height more.
Therefore, expectation is sought a kind of waste water that can use as recirculated cooling water, does not need the method for high pre-treatment cost again.
Summary of the invention
Technical problem to be solved by this invention provides the method and apparatus of a kind of aluminium wastewater as recirculated cooling water.
Aluminium wastewater comprises aluminum ion and some organism usually, and aluminum ion and organic matter removal that traditionally will be wherein discharge after reaching emission standard.Because aluminum ions throwing out, and very easily sedimentation, and organic existence is very unfavorable for water cycle, and making can't be with aluminium wastewater as recirculated cooling water, often needs the complicated pretreatment could be as recirculated cooling water.
But, present inventor's discovery is removed most of aluminum ion from waste water after, although residual organic substances is unfavorable to circulating water system, can remove, but reduce organic concentration in the processing of circulating water system round-robin process discontinuous at waste water by pre-treatment.Therefore, the present invention proposes the method that the simple pre-treatment of a kind of process can be used as aluminium wastewater recirculated cooling water.
Aluminium wastewater proposed by the invention is as the method for recirculated cooling water, be used to handle and comprise aluminum ion and the organic aluminium wastewater of concentration between 10mg/L-1g/L, this method comprises that the pH value with waste water is adjusted to 7.5, carry out aluminum ions coagulation in the waste water, make waste water through a strainer then, aluminium behind the coagulation in the filtered wastewater and biological clay make the aluminium content in the waste water be brought down below 3mg/L.Like this, the waste water after filtering can be imported recirculating cooling water system, and,, make water quality satisfy the requirement of cooling water system with the organism in the degradation water carrying out water treatment to recirculating cooling water system injection ozone.
Aluminium wastewater proposed by the invention comprises pH value setter, strainer, cooling tower and ozonated water generator as the equipment of recirculated cooling water.PH value setter is imported this aluminium wastewater, and the pH value of waste water is adjusted to 7.5, carries out aluminum ions coagulation in the waste water.Strainer connects this pH value strainer, and aluminium behind the coagulation in the filtered wastewater and biological clay make the aluminium content in the waste water be brought down below 3mg/L.Cooling tower connects this strainer, and the waste water after input is filtered is water as a supplement, and wherein this cooling tower is included in the recirculating cooling water system.Ozonated water generator injects ozone to this cooling tower and carries out water treatment, with the organism in the degradation water.
The present invention makes it compared with prior art owing to adopt above technical scheme, has both avoided direct discharging of waste water, can avoid the complicated pre-treatment that realizes that waste water recycling is required again, therefore has very significant meaning for the conserve water resource and the energy.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the method flow diagram of the aluminium wastewater of one embodiment of the invention as recirculated cooling water.
Fig. 2 illustrates the equipment synoptic diagram that is used as recirculated cooling water in order to the aluminium wastewater of implementing.
Fig. 3 illustrates concrete application examples schema of the present invention.
Embodiment
Usually, principal pollutant are aluminium in the low aluminium wastewater, content is about 10mg/L-1g/L, other composition can contain on a small quantity with COD (chemical oxygen demand (COD), concentration is lower than 75mg/L, adopts the potassium dichromate process of " water and effluent monitoring analytical procedure " (the 4th edition) to detect) reducing substanceses such as organism weighed, ammonia nitrogen (concentration is lower than 3mg/L) etc.Wherein, because aluminum ion has throwing out, and very easily sedimentation, aluminum ions existence can cause the serious fouling of recirculating cooling water system, so the present invention expects to reduce aluminum ions concentration, to alleviate or to avoid this harm.In addition, COD material and ammonia nitrogen are removed in same expectation, use so that be suitable for recirculating cooling water system.Different with traditional treatment method is that the present invention removed organic pre-treatment before waste water enters recirculating cooling water system, but handled organism in the recirculating cooling water system working cycle.
Fig. 1 illustrates the method flow diagram of the aluminium wastewater of one embodiment of the invention as recirculated cooling water.Fig. 2 illustrates the equipment synoptic diagram that is used as recirculated cooling water in order to the aluminium wastewater of implementing.It is pointed out that at this method shown in Figure 1 is not to use equipment shown in Figure 2 to implement.
With reference to shown in Figure 2, an embodiment of this equipment comprises pH value setter 21, buffer tank 22, topping-up pump 23, accurate filter 24, cooling tower 25 and ozonated water generator 26.Wherein pH value setter 21, buffer tank 22, topping-up pump 23, accurate filter 24, cooling tower 25 connect successively.Cooling tower 25, ozonated water generator 26 as the integral part of recirculating cooling water system, are formed recirculating cooling water system with handpiece Water Chilling Units 27, water circulating pump group 28 simultaneously.Wherein, the water that enters recirculating cooling water system circulates between cooling tower 25, handpiece Water Chilling Units 27, water circulating pump group 28.Ozonated water generator 26 can for example inject certain density ozone at one or more decanting points in the cooling tower 25.
With reference to shown in Figure 1, at first in step S1, to pH value setter 21 input aluminium wastewaters, aluminium ion concentration is 10mg/L-1g/L in the waste water, other composition can contain a small amount of COD material (concentration is lower than 75mg/L), ammonia nitrogen (concentration is lower than 3mg/L), in pH value setter 21, the pH value of waste water is adjusted to target pH value 7.5, carry out aluminum ions coagulation in the waste water.Alternatively, at step S2, make waste water through buffer tank 22, so that solid impurity preliminary sedimentation, the discharge that may contain in the waste water.Then, at step S3, aluminium behind the coagulation in accurate filter 24 filtered wastewaters and biological clay etc. make the aluminium content in the waste water be brought down below 3mg/L.In addition, the concentration of the COD material concentration that is lower than 75mg/L, ammonia nitrogen is lower than 3mg/L.These indexs can satisfy the recirculating cooling water system described in the present embodiment to requirements in water quality.Therefore, at step S4, can directly waste water be imported the make up water of cooling tower 25 as recirculating cooling water system.After this, waste water can be as the recirculated water of recirculating cooling water system, circulation between cooling tower 25, handpiece Water Chilling Units 27, water circulating pump group 28.In step S5, in working cycle, ozonated water generator 26 can inject ozone to cooling tower 25 and carry out water treatment, and the ozone of injection is by feedback and control automatically, keep the full cycle aqueous systems to have the dissolved ozone of 0.01-0.2mg/L residual, with organism such as the COD material in the degradation water, ammonia nitrogens.For example, can detect ozone concn, input to the foundation of ozonated water generator 26 as control ozone injection rate by the ozone concentration sensor of being located at each position of recirculating cooling water system.Ozone can carry out effective processing of scale inhibition, sterilization, inhibition simultaneously to the full cycle cooling water system.
As seen, when the foregoing description with simple pre-treatment with after ozone technology combines, can be so that originally need discharging after treatment or, can be directly used in recirculating cooling water system through the waste water of a small amount of COD material of containing of complex process reuse (being lower than 75mg/L), ammonia nitrogen (being lower than 3mg/L), aluminium (less than 3mg/L).
Application examples below in conjunction with a reality illustrates method of the present invention.
Certain brew-house has produced a large amount of alkalescence every day and has contained aluminium wash bottle waste water and tart malting effluent.Two kinds of waste water mix in this factory at present, regulate the back biochemical treatment of pH value, water after the processing directly is discharged into the municipal wastewater system, existing water technology is not realized the reuse of water, manufacturer is just in the face of increasing water cost pressure, owing to the instability of alkaline waste water quantity discharged, existing technology also can cause the discharge water aluminium content after the final processing to surpass the discharge water national standard simultaneously.
With reference to shown in Figure 3, wherein step S11-S13 is original treatment process of waste water, and step S14-S18 is an additional process of using method of the present invention.After step S13, the direct waste discharge of original technology, and after adopting method of the present invention is adjusted to target pH value 7.5 in step S14 with the pH value of waste water, carries out aluminum ions coagulation in the waste water.Then, at step S5, aluminium behind the coagulation in the accurate filter filtered wastewater and biological clay etc. make the aluminium content in the waste water be brought down below 3mg/L.At step S16, directly waste water is imported the make up water of cooling tower 25 as recirculating cooling water system subsequently.After this, waste water can be as the recirculated water of recirculating cooling water system, circulation between cooling tower 25, handpiece Water Chilling Units 27, water circulating pump group 28.In step S17, in working cycle, can inject ozone to cooling tower 25 by ozonated water generator 26 and carry out water treatment, the ozone of injection is by control automatically, keep the full cycle aqueous systems to have the dissolved ozone of 0.01-0.2mg/L residual, with organism such as the COD material in the degradation water, ammonia nitrogens.After waste water carries out repeatedly concentrating in recirculating cooling water system, can select to efflux at step S18.
It is worthy of note, keep step S12 and S13 and can make original technology and newly-increased technology seamless connection.But preferably, when change in concentration is little, can omit step S12 and S13, as if COD material (concentration is lower than 75mg/L), ammonia nitrogen (concentration is lower than 3mg/L) to avoid unnecessary elapsed time and resource at the mixed waste water of step S11.
Therefore, the present invention is by the improvement of technology, not only solved the problem that aluminium wastewater exceeds standard, and realized after the discarded simple pre-treatment of water of adopting process with regard to reuse to recirculated cooling water, make the make up water of industrial circulating cooling water become the discarded water of the technology of making a silk purse out of a sow's ear from tap water, realize water saving, reduced the water pressure of using of enterprise greatly.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (8)
1. an aluminium wastewater is as the method for recirculated cooling water, and described aluminium wastewater comprises aluminum ion and the organism of concentration between 10mg/L-1g/L, said method comprising the steps of:
The pH value of waste water is adjusted to 7.5, carries out aluminum ions coagulation in the waste water;
Make waste water through a strainer, aluminium behind the coagulation in the filtered wastewater and biological clay make the aluminium content in the waste water be brought down below 3mg/L;
With the waste water input recirculating cooling water system after filtering;
Carrying out water treatment, with the organism in the degradation water to recirculating cooling water system injection ozone.
2. the method for claim 1 is characterized in that, described aluminium wastewater is single waste water.
3. the method for claim 1 is characterized in that, described aluminium wastewater is to be mixed by two or more waste water.
4. the method for claim 1 is characterized in that, described organism comprises COD material and ammonia nitrogen, and wherein the COD material concentration is lower than 75mg/L, and ammonia nitrogen concentration is lower than 3mg/L.
5. the method for claim 1 is characterized in that, comprise in the step of carrying out water treatment to recirculating cooling water system injection ozone: the Control Circulation cooling water system has the dissolved ozone of 0.01-0.2mg/L residual.
6. an aluminium wastewater is as the equipment of recirculated cooling water, and described aluminium wastewater comprises aluminum ion and the organism of concentration between 10mg/L-1g/L, and described equipment comprises:
PH value setter is imported this aluminium wastewater, and the pH value of waste water is adjusted to 7.5, carries out aluminum ions coagulation in the waste water;
Strainer connects this pH value strainer, and aluminium behind the coagulation in the filtered wastewater and biological clay make the aluminium content in the waste water be brought down below 3mg/L;
Cooling tower connects this strainer, and the waste water after input is filtered is water as a supplement, and wherein this cooling tower is included in the recirculating cooling water system;
Ozonated water generator injects ozone to this cooling tower and carries out water treatment, with the organism in the degradation water.
7. equipment as claimed in claim 6 is characterized in that, also comprises buffer tank, is connected between this pH value setter and this strainer, and this buffer tank is from top output waste water and at bottom deposit mud.
8. equipment as claimed in claim 7 is characterized in that, also comprises topping-up pump, is located between this buffer tank and this strainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101805495A CN102249438B (en) | 2010-05-20 | 2010-05-20 | Method and equipment for using aluminum-containing wastewater as circulating cooling water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101805495A CN102249438B (en) | 2010-05-20 | 2010-05-20 | Method and equipment for using aluminum-containing wastewater as circulating cooling water |
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| CN102249438A true CN102249438A (en) | 2011-11-23 |
| CN102249438B CN102249438B (en) | 2013-11-20 |
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| CN2010101805495A Active CN102249438B (en) | 2010-05-20 | 2010-05-20 | Method and equipment for using aluminum-containing wastewater as circulating cooling water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445723A (en) * | 2014-11-19 | 2015-03-25 | 重庆中科过滤设备制造有限公司 | Water treatment system for circulating cooling water of cement production system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2856037Y (en) * | 2005-09-16 | 2007-01-10 | 中国石油化工股份有限公司 | Sewage reclaiming treatment unit |
| CN100545104C (en) * | 2007-05-22 | 2009-09-30 | 上海轻工业研究所有限公司 | The automatic control device for the treatment of cooling circulation water system by ozone |
| CN201729723U (en) * | 2010-05-20 | 2011-02-02 | 上海轻工业研究所有限公司 | Equipment using aluminiferous sewage into circulated cooling water |
-
2010
- 2010-05-20 CN CN2010101805495A patent/CN102249438B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2856037Y (en) * | 2005-09-16 | 2007-01-10 | 中国石油化工股份有限公司 | Sewage reclaiming treatment unit |
| CN100545104C (en) * | 2007-05-22 | 2009-09-30 | 上海轻工业研究所有限公司 | The automatic control device for the treatment of cooling circulation water system by ozone |
| CN201729723U (en) * | 2010-05-20 | 2011-02-02 | 上海轻工业研究所有限公司 | Equipment using aluminiferous sewage into circulated cooling water |
Non-Patent Citations (1)
| Title |
|---|
| 黄建军等: "臭氧技术在循环冷却水处理中的应用", 《供水技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445723A (en) * | 2014-11-19 | 2015-03-25 | 重庆中科过滤设备制造有限公司 | Water treatment system for circulating cooling water of cement production system |
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| CN102249438B (en) | 2013-11-20 |
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