CN102838227A - System and method for treating industrial park recycled water to form power plant boiler supplemental water - Google Patents
System and method for treating industrial park recycled water to form power plant boiler supplemental water Download PDFInfo
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- CN102838227A CN102838227A CN2012102909700A CN201210290970A CN102838227A CN 102838227 A CN102838227 A CN 102838227A CN 2012102909700 A CN2012102909700 A CN 2012102909700A CN 201210290970 A CN201210290970 A CN 201210290970A CN 102838227 A CN102838227 A CN 102838227A
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Abstract
The invention relates to feed water treatment and in particular to a system and method for treating industrial park recycled water to form power plant boiler supplemental water, which are mainly used for solving the technical problems of high operating cost, large floor area, easiness for blocking a reverse osmosis membrane and the like in recycled water treatment in the prior art. The system comprises a grid flocculation inclined tube sedimentation tank, a high-efficiency fiber filter, an ultra-filter unit, a two-stage reverse osmosis membrane unit, a mixed bed unit and a chemical feeding system, wherein the grid flocculation inclined tube sedimentation tank is connected with the high-efficiency fiber filter, the ultra-filter unit, the two-stage reverse osmosis membrane unit and the mixed bed unit in sequence; a water inlet of the grid flocculation inclined tube sedimentation tank is used as an industrial park recycled water inlet; and the outlet water of the mixed bed unit is used as the power plant boiler supplemental water.
Description
Technical field
The present invention relates to a kind of water treatment of giving, especially relating to a kind of is the treatment system and the method for boiler of power plant supplementary feed with water treatment in the industrial park.
Background technology
In short supply day by day along with surface water resources, and surface water pollution is increasingly serious, the development of industrial park more and more receives the restriction of water resources, has become the effective way that solves the shortage of water problem with water in the industrial park as the water source of boiler of power plant supplementary feed.With water treatment in the industrial park is that the boiler of power plant supplementary feed not only can provide stable source of water to power plant, can effectively reduce the discharging of pollutent simultaneously, has development prospect widely.But pollutents such as the organism in the industrial park in the water, suspended substance, saltiness, ammonia nitrogen are higher, and needing after treatment could be as boiler feedwater.
Chinese patent disclose a kind of in the r-o-pretreatment process (publication number: CN102285736A) of water when being back to power plant; Water coagulation clarification during it mainly adopts, become that hole filter, strong positive type receive that ion-exchanger is softening, two chambers weak acid, strongly-acid cation exchanger is softening and the pH adjustment after, water outlet is intake as reverse osmosis units.There is the technical process complex process in this method, and floor space is big, and the regenerating acid quantity of alkali consumption is big, the working cost problem of higher.Chinese patent also discloses a kind of treatment system (Granted publication number: CN201785288U) that bad V class surface water is treated to Drinking Water; After it mainly adopted BAF, high speed settling pond, ultrafiltration and disinfecting tank to handle, water outlet was as tap water.This treatment system is primarily aimed at surface water, handles the back water outlet as tap water.
Summary of the invention
It is the treatment system and the method for boiler of power plant supplementary feed with water treatment in the industrial park that the present invention provides a kind of, and it mainly is to solve the water treatment of existing in prior technology centering to exist working cost high, and floor space is big, and reverse osmosis membrane is prone to the stifled technical problem that waits.
Above-mentioned technical problem of the present invention mainly is able to solve through following technical proposals:
Of the present invention is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park; Comprise grid flocculation tube settler, high-efficiency fiber filter, ultra filtration unit, twin-stage reverse osmosis membrane unit, mix bed unit and medicine system, said grid flocculation tube settler, high-efficiency fiber filter, ultra filtration unit, twin-stage reverse osmosis membrane unit, mixed bed unit connect through pipeline successively.
Former water is promoted to the grid flocculation tube settler through pump; The mixing of grid flocculation tube settler collection, flocculation, deposition, mud concentrate in the processing structures of one; Through adding flocculation agent, coagulant aids and sterilant; Can effectively remove suspended substance, colourity, ammonia nitrogen, phosphorus and partial organic substances, effluent quality is good.Flocculation zone adopts grid reaction, and the settling region adopts tube settling, and shore pipe is established in the bottom, pond, adopts electrically operated valve control spoil disposal.
Be connected to high-efficiency fiber filter through the outlet of grid flocculation tube settler through pipeline and pump; High-efficiency fiber filter has characteristics: filtering accuracy is high; Clearance to suspended substance in the water can reach more than 95%, and impurity such as larger molecular organics, virus, bacterium, colloid, iron are had certain removal effect; Filtration velocity is fast, is generally 40m/h, reaches as high as 60m/h, is more than 3 times of normal sands filter; Pollutant holding capability is big, is generally 15～35kg/m3, is more than 4 times of normal sands filter; The backwash water consumption rate is low, and the back flushing water loss is less than 1～2% of cycle drainage amount.The raising of cycle water production rate, ton water running expense also reduces thereupon; Floor space is little: produce the identical water yield, floor space is below 1/3 of normal sands filter.
The ultra-filtration membrane unit of above-mentioned treatment system adopts external pressure type hollow fiber membrane component, and membrane pore size is 0.03-0.045 μ m; Membrane flux is 40-120 L/m
225 ℃ of hbar (selected according to the water inlet condition), water outlet SDI value is less than 3.This ultra-filtration membrane unit major advantage is selected the suitable membrane aperture for use, and anti-absorption pollution capacity is good, is easy to clean.
The membrane element useful area of the reverse osmosis units of above-mentioned treatment system is 33.9 square metres/; Design average flux 19.5L/m2.h.This reverse osmosis units principal feature according to the characteristic of the effluent quality and the former water of ultra-filtration membrane unit 3, is selected pollution-resistant membrane, reduces the matting number of times, and ratio of desalinization is relatively stable.
Mixed bed unit in the above-mentioned treatment system adopts yin, yang ion mixing interchanger, can further remove saltiness, makes specific conductivity less than 0.2mS/cm,, silicon-dioxide is less than 20mg/L, satisfies into power plant to the boiler feedwater requirements in water quality that feeds water.Mixed bedly have that water outlet is good, water outlet pH value is near neutral, stable effluent quality, short period of time operational conditions change (like influent quality or component, operation flow velocity etc.) to mixing the little advantage of bed effluent quality influence.
Grid flocculation tube settler and high-efficiency fiber filter are tentatively removed water organism, suspended substance and partial organic substances in the industrial park, have guaranteed the unitary influent quality of subsequent disposal.
High-efficiency fiber filter is as filtering unit, has the filtering accuracy height, floor space is little, filtering velocity is fast, the backwash water consumption rate is low, the reliable advantage of stable effluent quality.
The ultra-filtration membrane unit guarantees the effluent quality organic content, and bacterium, virus etc. is had removal effect, satisfies the into requirement of twin-stage reverse osmosis membrane unit, and this system can adopt modular design, and processing cost is low, and efficient is high, realizes robotization control.
The twin-stage reverse osmosis membrane unit guarantees effluent quality, effectively removes saltiness, and water outlet is as mixing the bed unit water inlet, and this system can adopt modular design, and processing efficiency is high, realizes robotization control.
Mixed bed unit guarantees that effluent quality satisfies power plant to the boiler feedwater requirements in water quality, further removes saltiness, and this unit has long advantage of regeneration period.
As preferably, described grid flocculation tube settler adopts the grid reaction pond, and its settling region adopts tube settling, and shore pipe is established in the settling tank bottom, adopts electrically operated valve control spoil disposal.
As preferably, it is filtration medium that described high-efficiency fiber filter adopts the comet type fibrous packing, and filtering velocity is 39-52m/h, and filter backwash adopts electrically operated valve control backwash, comprises air purge, washing and air water associating backwash.
As preferably, described ultra filtration unit adopts external pressure type hollow fiber membrane component, and membrane pore size is 0.03-0.045 μ m; Membrane flux is 40-120 L/m
225 ℃ of hbar.
As preferably, described reverse osmosis units adopts pollution-resistant membrane, and the membrane element useful area is 33.9 square metres/, average flux 19.5L/m2.h.
As preferably, on the described mixed bed unit acid-alkali regeneration device is set.
As preferably, on the molten medicine-chest of described medicine system dosing pipe, dosing pump are set.
A kind of is the treatment process of boiler of power plant supplementary feed with water treatment in the industrial park, and described method comprises:
A. former water is risen to the grid flocculation tube settler through pump, the female pipe of former water water inlet adds flocculation agent, coagulant aids, sterilant, and former water is handled, and removes part suspended substance, colourity, ammonia nitrogen, phosphorus and partial organic substances;
B. water outlet is arrived high-efficiency fiber filter through pump and pipe-line transportation, through the abundant filtration of comet type fiber filtering, further removes pollutents such as suspended substance, organism, and delivery turbidity alleviates the load of subsequent processing device less than 3NTU;
C. water outlet promotes through pump and is transported to through the ultra-filtration membrane unit, makes the ultra-filtration membrane unit produce water SDI less than 3, and water inlet female pipe in ultra-filtration membrane unit adds sterilant, removes mikrobe mushroom in the water outlet;
D. after water outlet is handled through the twin-stage reverse osmosis membrane unit, go out water conductivity less than 10mS/cm.Adjusting adds dose and concentration according to the water yield, and the female pipe of first-stage reverse osmosis water inlet adds reductive agent and Scale inhibitors, to prolong the practical life of membrane element; The female pipe of two-pass reverse osmosis water inlet adds sodium hydroxide, makes water pH value into satisfy the requirement of reverse osmosis membrane;
E. the water outlet of twin-stage reverse osmosis membrane unit processing is after mixing the bed unit ion exchange treatment, and further desalination is to satisfy the water quality requirement of boiler of power plant supplementary feed.
The flocculation sediment water-in is as water inlet in the industrial park; Said mixed bed unit is as the water of boiler feedwater; Flocculation agent in the said medicine system, coagulant aids, sterilant are added in the grid flocculation settling tank inlet pipeline mixing tank; Said medicine system sterilant is added to ultrafiltration system backwash import; Said medicine system Scale inhibitors, reductive agent are added to the import of first-stage reverse osmosis system; Said medicine system alkali is added to the import of two-pass reverse osmosis system.
As preferably, described flocculation agent adopts 10% solution, coagulant aids to adopt 0.1-0.3% solution, sterilant to adopt 10% solution, Scale inhibitors to adopt 10% solution, reductive agent to adopt 10% solution, r-o-to adopt 10% solution, mix bed regeneration and adopt 31% solution, mix bed and regenerate and adopt 30% solution with alkali with acid with alkali.
As preferably, described flocculation agent is that Poly aluminum Chloride (PAC), coagulant aids are that SEPIGEL 305, sterilant are that Youxiaolin, Scale inhibitors name are called 11 times of liquid concentrators, reductive agent is that sodium sulfite anhy 96, acid adopt industrial hydrochloric acid, alkali to adopt industrial sodium hydroxide.
Therefore, the present invention makes that through materialization, embrane method and ion exchange method are combined the working cost of centering water treatment is lower, and floor space is less, and reverse osmosis membrane is difficult for stopping up, and has satisfied the water quality requirement of boiler of power plant supplementary feed, and is simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention.
Component, position and numbering among the figure: grid flocculation tube settler 1, high-efficiency fiber filter 2, ultra filtration unit 3, twin-stage reverse osmosis membrane unit 4, mixed bed unit 5, medicine system 6.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment: this example be the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park, like Fig. 1, comprise grid flocculation tube settler 1, high-efficiency fiber filter 2, ultra filtration unit 3, twin-stage reverse osmosis membrane unit 4, mix bed unit 5, medicine system 6.The grid flocculation tube settler adopts the grid reaction pond, and its settling region adopts tube settling, and shore pipe is established in the settling tank bottom, adopts electrically operated valve control spoil disposal.It is filtration medium that high-efficiency fiber filter adopts the comet type fibrous packing, and filtering velocity is 39-52m/h, and filter backwash adopts electrically operated valve control backwash, comprises air purge, washing and air water associating backwash.Ultra filtration unit adopts external pressure type hollow fiber membrane component, and membrane pore size is 0.03-0.045 μ m; Membrane flux is 25 ℃ of 40-120 L/m2hbar.Reverse osmosis units adopts pollution-resistant membrane, and the membrane element useful area is 33.9 square metres/, average flux 19.5L/m2.h.Mix on the bed unit acid-alkali regeneration device is set.On the molten medicine-chest of medicine system dosing pipe, dosing pump are set.
A kind of is the treatment process of boiler of power plant supplementary feed with water treatment in the industrial park, the steps include:
A. former water is risen to grid flocculation tube settler 1 through pump; The female pipe of former water water inlet adds flocculation agent, coagulant aids, sterilant; Former water is handled; Remove part suspended substance, colourity, ammonia nitrogen, phosphorus and partial organic substances, flocculation agent adopts 10% solution, coagulant aids to adopt 0.1-0.3% solution, sterilant to adopt 10% solution, and flocculation agent is that Poly aluminum Chloride (PAC), coagulant aids are that SEPIGEL 305, sterilant are Youxiaolin;
B. water outlet is arrived high-efficiency fiber filter 2 through pump and pipe-line transportation, through the abundant filtration of comet type fiber filtering, further removes pollutents such as suspended substance, organism, and delivery turbidity alleviates the load of subsequent processing device less than 3NTU;
C. water outlet promotes through pump and is transported to through ultra-filtration membrane unit 3, makes ultra-filtration membrane unit 3 produce water SDI less than 3, and water inlet female pipe in ultra-filtration membrane unit adds sterilant, removes mikrobe mushroom in the water outlet, and sterilant adopts 10% solution, and sterilant is a Youxiaolin;
D. after water outlet is handled through twin-stage reverse osmosis membrane unit 4, go out water conductivity less than 10 μ S/cm.Adjusting adds dose and concentration according to the water yield, and the female pipe of first-stage reverse osmosis water inlet adds reductive agent and Scale inhibitors, to prolong the practical life of membrane element; The female pipe of two-pass reverse osmosis water inlet adds sodium hydroxide; Make water pH value into satisfy the requirement of reverse osmosis membrane; Scale inhibitors adopts 10% solution, reductive agent to adopt 10% solution, r-o-to adopt 10% solution with alkali; The Scale inhibitors name is called 11 times of liquid concentrators, reductive agent is a sodium sulfite anhy 96, and alkali adopts industrial sodium hydroxide;
E. the water outlet of twin-stage reverse osmosis membrane unit 4 processing is after mixing bed unit 5 ion exchange treatment; Further desalination; To satisfy the water quality requirement of boiler of power plant supplementary feed; Mixed bed regeneration adopts 31% solution, mixed bed regeneration to adopt 30% solution with alkali with acid, and acid adopts industrial hydrochloric acid, alkali to adopt industrial sodium hydroxide.
The above is merely specific embodiment of the present invention, but constitutional features of the present invention is not limited thereto, and any those skilled in the art is in the field of the invention, and the variation of being done or modify all is encompassed among the claim of the present invention.
Claims (10)
1. one kind is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park; Comprise grid flocculation tube settler (1), high-efficiency fiber filter (2), ultra filtration unit (3), twin-stage reverse osmosis membrane unit (4), mix bed unit (5); Medicine system (6), said grid flocculation tube settler, high-efficiency fiber filter, ultra filtration unit, twin-stage reverse osmosis membrane unit, mixed bed unit connect through pipeline successively.
2. according to claim 1 is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park; It is characterized in that described grid flocculation tube settler (1) adopts the grid reaction pond; Its settling region adopts tube settling; Shore pipe is established in the settling tank bottom, adopts electrically operated valve control spoil disposal.
3. according to claim 1 is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park; It is characterized in that it is filtration medium that described high-efficiency fiber filter (2) adopts the comet type fibrous packing; Filtering velocity is 39-52m/h; Filter backwash adopts electrically operated valve control backwash, comprises air purge, washing and air water associating backwash.
4. according to claim 1 is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park, it is characterized in that described ultra filtration unit (3) adopts external pressure type hollow fiber membrane component, and membrane pore size is 0.03-0.045 μ m; Membrane flux is 40-120 L/m
225 ℃ of hbar.
5. according to claim 1 is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park; It is characterized in that described reverse osmosis units (4) adopts pollution-resistant membrane; The membrane element useful area is 33.9 square metres/, average flux 19.5L/m2.h.
6. according to claim 1 is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park, it is characterized in that on the described mixed bed unit acid-alkali regeneration device being set.
7. according to claim 1 is the treatment system of boiler of power plant supplementary feed with water treatment in the industrial park, it is characterized in that on the molten medicine-chest of described medicine system (6) dosing pipe, dosing pump being set.
8. one kind is the treatment process of boiler of power plant supplementary feed with water treatment in the industrial park, it is characterized in that described method comprises:
A. former water is risen to grid flocculation tube settler (1) through pump, the female pipe of former water water inlet adds flocculation agent, coagulant aids, sterilant, and former water is handled, and removes part suspended substance, colourity, ammonia nitrogen, phosphorus and partial organic substances;
B. water outlet is arrived high-efficiency fiber filter (2) through pump and pipe-line transportation, through the abundant filtration of comet type fiber filtering, further removes pollutents such as suspended substance, organism, and delivery turbidity alleviates the load of subsequent processing device less than 3NTU;
C. water outlet promotes through pump and is transported to through ultra-filtration membrane unit (3), makes ultra-filtration membrane unit (3) produce water SDI less than 3, and water inlet female pipe in ultra-filtration membrane unit adds sterilant, removes mikrobe mushroom in the water outlet;
D. after water outlet is handled through twin-stage reverse osmosis membrane unit (4), go out water conductivity less than 10mS/cm, adjusting adds dose and concentration according to the water yield, and the female pipe of first-stage reverse osmosis water inlet adds reductive agent and Scale inhibitors, and two-pass reverse osmosis water inlet mother pipe adds sodium hydroxide;
E. the water outlet of twin-stage reverse osmosis membrane unit (4) processing is after mixing bed unit (5) ion exchange treatment, and further desalination is to satisfy the water quality requirement of boiler of power plant supplementary feed.
9. according to claim 8 is the treatment process of boiler of power plant supplementary feed with water treatment in the industrial park, it is characterized in that described flocculation agent adopts 10% solution, coagulant aids to adopt 0.1-0.3% solution, sterilant to adopt 10% solution, Scale inhibitors to adopt 10% solution, reductive agent to adopt 10% solution, r-o-to adopt 10% solution, mixed bed regeneration to adopt 31% solution, mixed bed regeneration to adopt 30% solution with alkali with acid with alkali.
10. according to claim 8 is the treatment process of boiler of power plant supplementary feed with water treatment in the industrial park, it is characterized in that described flocculation agent is that Poly aluminum Chloride (PAC), coagulant aids are that SEPIGEL 305, sterilant are that Youxiaolin, Scale inhibitors name are called 11 times of liquid concentrators, reductive agent is that sodium sulfite anhy 96, acid adopt industrial hydrochloric acid, alkali to adopt industrial sodium hydroxide.
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| CN103739116A (en) * | 2013-12-31 | 2014-04-23 | 广东汇众环境科技股份有限公司 | Membrane-technology-based integrated water purification process |
| CN104267706A (en) * | 2014-10-17 | 2015-01-07 | 成都四为电子信息股份有限公司 | Integrated management system for water affairs |
| CN104556437A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Membrane technology-based municipal sewage deep treatment and recovery method |
| CN105008800A (en) * | 2013-02-20 | 2015-10-28 | 三菱日立电力系统株式会社 | Boiler operation method and boiler |
| CN105967377A (en) * | 2016-08-02 | 2016-09-28 | 四川拓璞环保科技有限公司 | Movable water purifier |
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| CN104556437A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Membrane technology-based municipal sewage deep treatment and recovery method |
| CN103539288A (en) * | 2013-10-31 | 2014-01-29 | 神华集团有限责任公司 | Industrial wastewater recovery method and wastewater recovery system |
| CN103739116A (en) * | 2013-12-31 | 2014-04-23 | 广东汇众环境科技股份有限公司 | Membrane-technology-based integrated water purification process |
| CN104267706A (en) * | 2014-10-17 | 2015-01-07 | 成都四为电子信息股份有限公司 | Integrated management system for water affairs |
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| CN110002631A (en) * | 2018-04-18 | 2019-07-12 | 中国环境科学研究院 | A kind of high phosphorus waste water membrane processing method |
| CN109293145A (en) * | 2018-10-22 | 2019-02-01 | 德蓝水技术股份有限公司 | The method that textile waste is back to Thermal Power Generation Industry |
| CN109231732A (en) * | 2018-11-27 | 2019-01-18 | 北京科泰兴达高新技术有限公司 | A kind of three film Treated sewage reusing processing systems |
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Application publication date: 20121226 |