CN1673123A - Treating method and micro flocculation reactor for reusing washing sewage - Google Patents
Treating method and micro flocculation reactor for reusing washing sewage Download PDFInfo
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- CN1673123A CN1673123A CN 200510011430 CN200510011430A CN1673123A CN 1673123 A CN1673123 A CN 1673123A CN 200510011430 CN200510011430 CN 200510011430 CN 200510011430 A CN200510011430 A CN 200510011430A CN 1673123 A CN1673123 A CN 1673123A
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Abstract
The present invention discloses one kind of treating method and micro flocculation reactor for reusing washing sewage. Washing sewage is collecting in regulating water tank and has its flock intercepted with the filtering net inside the tank; the washing sewage is then reacted with coagulating chemical in the micro flocculation reactor for some time and filtered in the ultrafiltering system at low pressure of 0.05-0.2 MPa; and the filtered water is collected for reuse in the next washing process. The micro flocculation reactor is one snake-shaped pipe, the ultrafiltering membrane is reverse flushed regularly, and the reverse flushed waste water is deposited inside the reverse flush waste water tank, with the supernatant being returned into the regulating water tank. The treating method is simple, high in water recovering rate and low in power consumption, and is suitable for use in where washing amount is relatively great and household.
Description
Technical field
The present invention relates to a kind of treatment process and micro flocculation reactor of wash water cycling and reutilization, particularly a kind of little flocculation-ultrafiltration combination process that utilizes is handled wash water to obtain the micro flocculation reactor that utilizes the method for water again and be used for little flocculation capable of circulation.
Background technology
The principal pollutant composition is anion surfactant LAS, grease FOG and suspended substance TSS in the wash water.At present, traditional wash water treatment process is to be main processing target with anion surfactant LAS in the sewage, adopt coagulation-air supporting-filtration process, the two stage biological facture, or little flocculation-filtration-ultrafiltration technology, to reach in country discharging and the middle water reuse water quality standard strict demand to LAS.
These technical process complexity, equipment is many, occupation of land is big.Wherein, coagulation-air supporting-filtration process optimal coagulant dose reaches 150-200mg/L, big, the airfloat equipment energy consumption height of sludge quantity; Two stage biological treatment process biological inoculum is cultivated the domestication difficulty, startup is consuming time, biological sludge mud amount is big.
The paper " research of bath wastewater ultrafiltration membrane treatment reuse technology " that the 33rd the 6th phase of volume of in December, 2000 " HarBin Building University's journal " delivers has been introduced little flocculation-filtration-ultrafiltration technology, this technology has a filtration procedure between little flocculation and uf processing, its little throwing out mainly is for reinforcing fibre silk or the filtering effect of sand, make the raw water quality of ultra-filtration membrane into be able to improvement on apparent, but this improvement is very limited for easily ultra-filtration membrane being produced the removal of the small molecules pollution substance that absorption, fenestra stops up.This technology ultra-filtration membrane molecular weight cut-off is 30, and 000Da is higher to anion surfactant LAS clearance, but in the wash water recycle process, LAS is of value to washing clothes as the washing composition main active ingredient, should give reservation.Secondly, filtering filtrate needs regularly air-water backwashing, has increased facility investment and maintenance cost.The impurity that filters in filtrate and the ultra-filtration membrane backwashing wastewater is difficult to natural subsidence, and backwashing wastewater directly discharging causes secondary pollution, has reduced the rate of recovery of water.Ultra-filtration membrane adopts tangential flow filtration, and energy consumption is higher.
Traditional micro flocculation reactor is a groove shape container, and inside is divided into several lattice, and every lattice need the stirring of different rotating speeds stirring rake, and with controlling reaction time, equipment is many, the energy consumption height.Existing static mixer product, its structure is the inner distribution propeller blade of high-strength metal pipe, and required working accuracy height, maintenance difficult, head loss is big, energy consumption is high, the cost height, can only play the mixing effect of coagulated agent and former water, but can't control flexibly and adjusting reaction time.
Summary of the invention
Many at the technical process complexity, the equipment that exist in the existing wash water treatment technology, energy consumption is high, the rate of recovery of water is low, sludge quantity big, the mud problems and shortcomings of need special disposal and micro flocculation reactor in addition, the invention provides a kind of treatment process and micro flocculation reactor of wash water cycling and reutilization.
Directly establish little flocculation pre-treatment before the ultrafiltration, because fenestra is than the little 2-3 of a filtrate hole order of magnitude, the micro-floccule that lower dosage and reaction times form down just can the surperficial effectively catching of tunicle, increase substantially the clearance of microorganisms such as suspended substance in the water, grease, bacterium on the one hand, effectively alleviate the film pollution level on the other hand, avoided the fenestra blockage problem.The wash water recycle, the primary goal pollutent of removing is grease and suspended substance, reduced the dosage of coagulated agent, reduced sludge yield, mud is by the extruding of ultra-filtration filters pressure and the crown_interception of film, and mud resistivity and water ratio reduce greatly, is easy to natural subsidence and separates, supernatant liquor reclaims, and improves the rate of recovery of water and has avoided secondary pollution.Ultra-filtration membrane molecular weight cut-off 50, more than the 000Da, free washing composition activeconstituents LAS easily is retained, and is of value to next washing process.In addition, ultra-filtration membrane adopts dead-end filtration, does not have tangential flow, has reduced energy consumption.The reactor that is used for little flocculation is formed by connecting by 90 degree elbows, concentric reducer by the straight length of light plastic tubing with certain-length, and cost is low, energy consumption is low, be easy to control and adjusting reaction time flexibly.
The technical scheme of the treatment process of a kind of wash water cycling and reutilization of the present invention is as follows:
(1) direct ultra-filtration after little flocculation, the centre does not need sand and filters or fiber filter, and the direct cycling and reutilization of ultra-filtration membrane water outlet is in washing clothes;
(2) little flocculation is undertaken by micro flocculation reactor, reaction times 5s-1min, length, the caliber by changing the micro flocculation reactor pipeline section and be connected radical the reaction times is regulated;
(3) little flocculation coagulated agent is a polymerize aluminum chloride, and dosage 40-80mg/L, coagulated agent are Tai-Ace S 150, dosage 60-100mg/L;
(4) the ultra-filtration membrane molecular weight cut-off is 50, more than the 000Da, adopt dead-end filtration under the 0.05-0.2MPa working pressure, hold back on microorganism tunicle surfaces such as micro-floccule in the water and bacterium, free property anion surfactant in the water sees through fenestra and is retained in the water, is used for washing clothes once more;
(5) ultra-filtration membrane is carried out the timing back flushing, every the 5min-30min back flushing once, flush time is 30s-3min, backwashing wastewater inserts in the backwashing wastewater case, natural sedimentation solid-liquid separation after staying for some time, mud dries outward transport, and supernatant liquor is squeezed into regulating tank again.
A kind of reactor that is used for little flocculation of the present invention is a snake pipe, a termination pump outlet, another termination ultrafiltration module.Use snake pipe to help the thorough mixing effect of coagulated agent and current, be easy to adjusting reaction time, head loss is low, takes up an area of for a short time, has saved equipment such as stirring rake.
Beneficial effect of the present invention: can hold back microorganisms such as suspended substance in the sewage, grease, bacterium effectively, directly recycle of the water after the processing need not sterilization; Kept the free property washing composition activeconstituents LAS that helps washing effect in the treating water, alleviated pollution environment.It is few that the present invention produces mud, and moisture percentage in sewage sludge is low, can realize the synchronous processing of sewage, mud, and the rate of recovery of water has been saved water resources greatly up to 85%-92%.This technical process is simple, and equipment is few, and investment is low with working cost.
Description of drawings
Fig. 1 is a wash water cycling and reutilization process flow synoptic diagram of the present invention;
Fig. 2 is the micro flocculation reactor synoptic diagram.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments:
Embodiment 1: the processing water yield is 1m3/h: the wash water of washing machine discharging is collected regulating tank, utilize the filter screen of settling in the regulating tank, the foreign material such as batting in the wash water are held back; After adding coagulated agent polymerize aluminum chloride 40mg/L in the pump sump mouth before micro flocculation reactor, enter micro flocculation reactor reaction 25s, make fine suspension in the water, organism, grease etc. form micro-floccule; Pass through ultrafiltration membrance filter after little flocculation, it is 100 that ultra-filtration membrane adopts molecular weight cut-off, the polypropylene PP hollow-fibre membrane of 000Da, under mould 0.1MPa working pressure, almost completely hold back on microorganism tunicle surfaces such as micro-floccule in the water and bacterium, 75% free property anion surfactant sees through fenestra in the water, and the water after the filtration inserts high-order recycle water tank, and recycle water can be from flowing to washing machine from elevated tank; Every 30min back flushing 2min, backwashing wastewater inserts in the backwashing wastewater case to ultrafiltration membrane system, stops behind the 1h solid-liquid separation voluntarily, and mud dries outward transport, and supernatant liquor is poured regulating tank again into, and the recovery utilization rate of water has reached 90%.
The micro flocculation reactor that uses in the present embodiment treatment process, one termination pump outlet, another termination ultrafiltration module, micro flocculation reactor is PVC by four root timber matter, long is 100cm, nominal diameter is respectively the straight length a of 15mm, 32mm, 50mm, 65mm, and being threaded by six 90 degree elbow b and three concentric reducer c forms.The straight length caliber minimum that connects pump outlet increases by the water (flow) direction caliber, is beneficial to the thorough mixing effect of coagulated agent and current, reaches the certain reaction time.90 degree elbows are adopted in connection between the straight length, have increased the action of turbulent flow of current, and concentric reducer has realized the connection of reducing pipeline section.
Embodiment 2: the processing water yield is 5m
3/ h: the wash water of washing machine discharging is collected regulating tank, utilize the filter screen of settling in the regulating tank, the foreign material such as batting in the wash water are held back; After adding coagulated agent Tai-Ace S 150 80mg/L in the pump sump mouth before micro flocculation reactor, enter micro flocculation reactor reaction 15s, make fine suspension in the water, organism, grease etc. form micro-floccule; Pass through ultrafiltration membrance filter after little flocculation, it is 50 that ultra-filtration membrane adopts molecular weight cut-off, the polyacrylonitrile (PAN) hollow-fibre membrane of 000Da, under mould 0.15MPa working pressure, almost completely hold back on microorganism tunicle surfaces such as micro-floccule in the water and bacterium, 70% free property anion surfactant sees through fenestra in the water, and the water after the filtration inserts high-order recycle water tank, and recycle water can be from flowing to washing machine from elevated tank; Every 5min back flushing 30s, backwashing wastewater inserts in the backwashing wastewater case to ultrafiltration membrane system, stops behind the 45min solid-liquid separation voluntarily, and mud dries outward transport, and supernatant liquor is poured regulating tank again into, and the recovery utilization rate of water has reached 88%.
The micro flocculation reactor that uses in the present embodiment treatment process, one termination pump outlet, another termination ultrafiltration module, micro flocculation reactor is ABS by five root timber matter, long is 150cm, nominal diameter is respectively the straight length a of 20mm, 50mm, 50mm, 65mm, 65mm, and being threaded by eight 90 degree elbow b and four concentric reducer c forms.The straight length caliber minimum that connects pump outlet increases by the water (flow) direction caliber, is beneficial to the thorough mixing effect of coagulated agent and current, reaches the certain reaction time.90 degree elbows are adopted in connection between the straight length, have increased the action of turbulent flow of current, and concentric reducer has realized the connection of reducing pipeline section.
Claims (5)
1. the treatment process of a wash water cycling and reutilization, by the washing machine discharging wash water collect regulating tank, under the effect of water pump, handle reuse afterwards by little flocculation, filtration, ultrafiltration technology, it is characterized in that:
(1) direct ultra-filtration after little flocculation, the centre does not need sand and filters or fiber filter, and the direct cycling and reutilization of ultra-filtration membrane water outlet is in washing clothes;
(2) little flocculation is undertaken by micro flocculation reactor, reaction times 5s-1min, length, the diameter by changing the micro flocculation reactor pipeline section and be connected radical the reaction times is regulated;
(3) little flocculation coagulated agent dosage 40-100mg/L;
(4) ultra-filtration membrane adopts dead-end filtration under the 0.05-0.2MPa working pressure, adopt molecular weight cut-off more than or equal to 50, the ultra-filtration membrane of 000Da, hold back on microorganism tunicle surfaces such as micro-floccule in the water and bacterium, free property anion surfactant in the water sees through fenestra and is retained in the water, is used for washing clothes once more;
(5) ultra-filtration membrane is carried out the timing back flushing, backwashing wastewater inserts in the backwashing wastewater case, the back natural sedimentation solid-liquid separation that stays for some time, and mud dries outward transport, and supernatant liquor is squeezed into regulating tank again.
2. the treatment process of wash water cycling and reutilization according to claim 1, when it is characterized in that little flocculation coagulated agent is polymerize aluminum chloride, dosage 40-80mg/L; When coagulated agent is Tai-Ace S 150, dosage 60-100mg/L.
3. the treatment process of wash water cycling and reutilization according to claim 1 is characterized in that the time of ultra-filtration membrane being carried out back flushing is every the 5min-30min back flushing once that flush time is 30s-3min.
4. micro flocculation reactor that is used for wash water cycling and reutilization treatment process, it is characterized in that: micro flocculation reactor is a snake pipe, a termination pump outlet, another termination ultrafiltration module.
5. the micro flocculation reactor that is used for wash water cycling and reutilization treatment process according to claim 4 is characterized in that being formed by connecting by straight length, 90 degree elbows, concentric reducer.
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| CN101279806B (en) * | 2008-05-22 | 2010-04-14 | 吴紫城 | Recycling use method and apparatus for wastewater of carwash and laundry |
| CN101402492B (en) * | 2008-11-19 | 2011-06-29 | 北京桑德环境工程有限公司 | Wastewater treatment system and method for improving coefficient of recovery |
| CN102161524A (en) * | 2011-01-18 | 2011-08-24 | 北京服装学院 | Method for regenerating and recycling wool scouring wastewater |
| CN102529897A (en) * | 2012-01-16 | 2012-07-04 | 张卫平 | Movable vehicle cleaning system and method for recycling water for vehicle cleaning |
| CN103263850A (en) * | 2013-05-16 | 2013-08-28 | 浙江艾杰斯生物科技有限公司 | Aseptic filtration method and device for vitamin solution |
| WO2014206313A1 (en) * | 2013-06-28 | 2014-12-31 | 海尔集团技术研发中心 | Filtration device, washing machine and washing machine control method |
| WO2014206312A1 (en) * | 2013-06-28 | 2014-12-31 | 海尔集团技术研发中心 | Clothes-washing machine and clothes-washing control method |
| CN104514122A (en) * | 2013-09-27 | 2015-04-15 | 海尔集团技术研发中心 | Flocculation washing machine |
| CN104674514A (en) * | 2013-11-29 | 2015-06-03 | 海尔集团技术研发中心 | Washing machine, clothes washing control method and filtering module cleaning method |
| CN104674519A (en) * | 2013-11-29 | 2015-06-03 | 海尔集团技术研发中心 | Washing machine and washing control method |
| CN104925989A (en) * | 2015-05-21 | 2015-09-23 | 苏州膜海分离技术有限公司 | Micro-flocculation and ultrafiltration integrated water treatment equipment |
| CN104947384A (en) * | 2014-03-27 | 2015-09-30 | 海尔集团公司 | Washing machine flocculation device with self-cleaning function and washing machine |
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- 2005-03-15 CN CN 200510011430 patent/CN1274613C/en not_active Expired - Fee Related
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| CN101279806B (en) * | 2008-05-22 | 2010-04-14 | 吴紫城 | Recycling use method and apparatus for wastewater of carwash and laundry |
| CN101402492B (en) * | 2008-11-19 | 2011-06-29 | 北京桑德环境工程有限公司 | Wastewater treatment system and method for improving coefficient of recovery |
| CN102161524A (en) * | 2011-01-18 | 2011-08-24 | 北京服装学院 | Method for regenerating and recycling wool scouring wastewater |
| CN102161524B (en) * | 2011-01-18 | 2013-11-20 | 北京服装学院 | Method for regenerating and recycling wool scouring wastewater |
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| CN104925989A (en) * | 2015-05-21 | 2015-09-23 | 苏州膜海分离技术有限公司 | Micro-flocculation and ultrafiltration integrated water treatment equipment |
| CN106277495A (en) * | 2015-06-09 | 2017-01-04 | 兰州交通大学 | Micro-electricity flocculation-unpowered single-valve filter Integral type small-sized purifier |
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