CN105016559A - Paper mill wastewater pretreatment method - Google Patents
Paper mill wastewater pretreatment method Download PDFInfo
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- CN105016559A CN105016559A CN201510506376.4A CN201510506376A CN105016559A CN 105016559 A CN105016559 A CN 105016559A CN 201510506376 A CN201510506376 A CN 201510506376A CN 105016559 A CN105016559 A CN 105016559A
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Abstract
The invention discloses a paper mill wastewater pretreatment method. Wastewater sequentially passes through a regulating water-collecting tank, a grille, a grit chamber, a physical filtering tank, an ice grille, an electromagnetic absorption tank and an air floatation tank. The low-energy-consumption environmentally-friendly ice grille device is adopted in the pretreatment method, is applied to a paper making wastewater treatment process for the first time, has obvious removal effect on the particular organic matter difficult to remove and small solid suspended matter in paper making wastewater and is free of chemical reagents. The removal rate of the suspended matter in the paper making wastewater treated by means of the method is up to 98.1%, the chroma removing rate is up to 95.1%, and the turbidity removing rate is up to 98.8%.
Description
Technical field
The present invention relates to a kind of pretreatment process of paper mill effluent, belong to the water treatment field in environment protection.
Background technology
Along with the development of economy, improving constantly of standard of living, the protection of people to environment is more and more paid attention to, and according to pertinent data display, the annual quantity of wastewater effluent of China is about 3.9t, and with 1% increasing rate.China is papermaking rich and influential family, and paper waste quantity discharged is large.At present, there is large, medium and small paper mill sum more than 10000 family in China, and year, waste discharge amount was up to more than 40 hundred million m
3, account for 1/6th of national waste water total release, the BOD annual emissions in paper waste more than 200 ten thousand tons, account for national waste water always discharge in BOD 25%.
Paper industry is that energy consumption, material consumption are high, one of industry that environmental pollution is serious, and its polluting property is that wastewater discharge is large, and wherein COD, suspended substance (SS) content are high, and colourity is serious.The large-scale papermaking enterprise of current most domestic has waste water disposal facility, but the not treated direct discharge had or below standard discharge, some small-sized paper mills just do not have waste water disposal facility at all, and waste water directly enters periphery river, cause have a strong impact on to surrounding enviroment.Thus to realize the Sustainable development of paper industry, the pollution problem of paper industry must be solved comprehensively.The treatment system of paper waste is a lot, is summed up the combination mainly containing physical treatment process, method of chemical treatment, biological treatment and these three kinds of systems.In paper waste, suspended substance, turbidity, colourity are three kinds of topmost contamination indexs, and three kinds of contamination index's numerical value are very high, are the major objectives of pulping wastewater treatment, are also difficult point places.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of pretreatment process of paper mill effluent, paper mill factory effluent flows into through open drain and regulates water collecting basin, arranges grid, with the thick suspended substance that dams in open drain, then waste water flows into settling pit, filters out the suspended substances such as the silt in waste water, waste water flows into physics filtering basin from settling pit by pipeline, and the mixing media filtration be made up of Folium Pterocaryae, useless tealeaves, Cortex walnut, pomelo peel of filling in physical filtering pond, removes the suspended substance such as pectin, micelle tiny in water, then flow into ice foot equipment, the external refrigerator of ice foot equipment, on ice foot equipment two side, some wedge shape ice foot bars are fixed at interval, wedge shape pitch angle is 15 degree, face of slope is provided with eyelet, eye diameter 0.3cm, each perforated interval 1cm, the water of 1t can be filled with in every root ice foot bar, ice foot equipment passes through refrigerator refrigerate, temperature in ice foot equipment is reduced to subzero 2-10 DEG C, the instant water in ice foot bar is made to become ice, ice is separated out by the eyelet on inclined-plane, form icicle, the waste water flow through is filtered through row, some organism can freeze with icicle at low temperatures, suspended substance and the organic pollutant of difficult removal in waste water can be removed by icicle, then waste water flows into electromagnetic adsorption pond, electromagnetic adsorption pond is divided into low-voltage region, middle voltage regime, high-voltage region is totally three parts, and waste water flows into electromagnetic adsorption pond from low-voltage region, flow through middle voltage regime, flow out electromagnetic adsorption pond from high-voltage region, low-voltage region electrode voltage is set to 5v, and middle voltage regime electrode voltage is set to 20v, high-voltage region electrode voltage is set to 50v, by the electrostatic that electrode produces, be difficult to the fiber removed in planar water, the materials such as hemicellulose, with pump, waste water is squeezed into air flotation pool after process, in pond, flow into subsequent processing device after aeration decomposing organic matter.
Aerated grit chamber selected by settling pit.
Ice foot equipment inner wall is provided with thermal insulation coat.
The wedge shape ice foot bar quantity that on ice foot equipment two side, interval is fixing is 4-10 root.
The invention has the advantages that:
(1) this physical adsorption treatment process is not added any chemical reagent, is not adopted any bioremediation, and the mud that do not induce one, bacterial classification avoid the secondary pollution of water body, reduces difficulty and the bulk treatment cost of subsequent disposal, simple to operate.
(2) this physical adsorption treatment process adopts low-energy-consumptienvironment-friendlyhigh-precision environment-friendlyhigh-precision ice foot equipment, it is applied in paper-making effluent treating process and still belongs to the first time, and serves innovation effect, the organism that difficulty exclusive in paper waste is removed and the removal effect of small solid suspended substance obvious, and equipment investment cost is little, structure is simple, and add without chemical reagent, inner water can be recycled, without the need to process, easy to operate, practical rate is high, fully automated process.
(3) in the paper waste by present method process, the clearance of suspended substance reaches 98.1%, chroma removal rate 95.1%, turbidity removal rate 98.8%.
(4) mud decreases 4/5, significantly reduces enterprise's sludge treatment burden, substantially avoided the secondary pollution problem that mud brings.In addition, the output investment ratio conventional activated sludge process of this technology saves 20%, takes up an area saving 30%, and working cost saves 10%, and thus centering small paper mill is more with practical value.
(5) advanced technology, maturation, adaptable to change of water quality, stable, can ensure that effluent quality reaches the requirement that factory uses standard and national wastewater discharge standard.Reduce initial cost and working cost, save floor space and reduce energy consumption.Easy handling, flexible operation and be convenient to management.Be easy to realize automatic control, improve operational administrative level.At utmost reduce the detrimentally affect (smell, noise, aerosol etc.) to surrounding environment.
Accompanying drawing explanation
Fig. 1 is the pretreatment process schematic diagram of paper mill effluent.
1-grid, 2-regulate water collecting basin, 3-settling pit, 4-physical filtering pond, 5-ice foot equipment, 6-electromagnetic adsorption pond, 7-air flotation pool.
Fig. 2 is the schematic diagram of ice foot equipment.
52-refrigerator, 53-ice foot bar, 54-under meter, 55-pressure warning unit, 56-level indicator, 57-thermometer.
Embodiment
A pretreatment process for paper mill effluent as shown in Figure 1, the treatment system used comprises adjustment water collecting basin 1, grid 2, settling pit 3, physical filtering pond 4, ice foot equipment 5, electromagnetic adsorption pond 6, air flotation pool 7.Paper mill factory effluent row mouth connects the water inlet regulating water collecting basin 1 by pipeline, the water outlet of water collecting basin 1 is regulated to connect the water inlet of grid 2 by pipeline, the water outlet of grid 2 connects the water inlet of settling pit 3 by pipeline, the water outlet of settling pit 3 connects the water inlet of physics filtering basin 4 by pipeline, the water outlet in physical filtering pond 4 connects the water inlet of ice foot 5 by pipeline, the water outlet of ice foot 5 connects the water inlet in electromagnetic adsorption pond 6 by pipeline, the water outlet in electromagnetic adsorption pond 6 connects the water inlet of air flotation pool 7 by pipeline, the water outlet of air flotation pool 7 connects the water inlet of subsequent processing device by pipeline.In physical filtering pond 4, filtrate adopts Folium Pterocaryae, useless tealeaves, Cortex walnut and pomelo peel mixing, and four mass ratios are 3:2:3:5, and filtrate is encapsulated by multiple bundle, and filtrate cumulative volume accounts for the 1/3-1/2 in physical filtering pond.Electromagnetic adsorption pond 6 is divided into three parts, low-voltage region, middle voltage regime, high-voltage region, each region is provided with valve, waste water flows into electromagnetic adsorption pond 6 from low-voltage region, flows through middle voltage regime, flows out electromagnetic adsorption pond 6 from high-voltage region, 220v power supply is accessed in voltage adsorption tank 6, built-in stainless steel electrode, electrode is furnished with resistance, interval 20cm between electrode.The external refrigerator 52 of ice foot equipment 5, on ice foot equipment two side, some wedge shape ice foot bars 53 are fixed at interval, wedge shape pitch angle is 15 degree, face of slope is provided with eyelet, eye diameter 0.3cm, each perforated interval 5cm, can be filled with the water of 1t in every root ice foot bar, and ice foot equipment internal thermometer 57, under meter 54, pressure warning unit 55, level indicator 56, the temperature in ice foot equipment is subzero 2-10 DEG C.Plant effluent regulates water collecting basin 1 through open drain from flowing into, and arranges grid 2, with the thick suspended substance that dams in open drain; Then waste water flows into settling pit 3, and aerated grit chamber selected by settling pit 3, filters out the suspended substances such as the silt in waste water; Waste water flows into physics filtering basin 4 by pipeline after settling pit 3 flows out, and through the mixing media filtration of Folium Pterocaryae and useless tealeaves, removes the suspended substance such as pectin, micelle tiny in water, flows into ice foot equipment 5; Ice foot equipment 5 is freezed by refrigerator 52, temperature in ice foot 5 equipment will be subzero 2-10 DEG C, the instant water in ice foot bar is made to become ice, ice is separated out by the eyelet on inclined-plane, forms icicle, filters through row the waste water flowed down, at low temperatures, some organism can freeze with icicle, and can be removed suspended substance and the organic pollutant of difficult removal in waste water by icicle, then waste water flows into electromagnetic adsorption pond 6; In electromagnetic adsorption pond 6, low-voltage region electrode voltage is set to 5v, middle voltage regime electrode voltage is set to 20v, high-voltage region electrode voltage is set to 50v, electromagnetic adsorption pond pool wall is cement structures, and be brushed with insulation compound, the electrostatic produced by electrode, be difficult to the fiber removed in planar water, the materials such as hemicellulose, make its by electrostatic interaction adsorb by electrode; Waste water is squeezed into air flotation pool 7 by processed waste water pump, in pond, flow into subsequent processing device after aeration decomposing organic matter.
Claims (4)
1. a pretreatment process for paper mill effluent, is characterized in that, paper mill factory effluent flows into through open drain and regulates water collecting basin, arranges grid, with the thick suspended substance that dams in open drain, then waste water flows into settling pit, filters out the silt in waste water, waste water flows into physics filtering basin from settling pit by pipeline, and the mixing media filtration be made up of Folium Pterocaryae, useless tealeaves, Cortex walnut, pomelo peel of filling in physical filtering pond, removes pectin, micelle tiny in water, then flow into ice foot equipment, the external refrigerator of ice foot equipment, on ice foot equipment two side, some wedge shape ice foot bars are fixed at interval, wedge shape pitch angle is 15 degree, face of slope is provided with eyelet, eye diameter 0.3cm, each perforated interval 1cm, the water of 1t can be filled with in every root ice foot bar, ice foot equipment passes through refrigerator refrigerate, temperature in ice foot equipment is reduced to subzero 2-10 DEG C, the instant water in ice foot bar is made to become ice, ice is separated out by the eyelet on inclined-plane, form icicle, the waste water flow through is filtered through row, some organism can freeze with icicle at low temperatures, suspended substance and the organic pollutant of difficult removal in waste water can be removed by icicle, then waste water flows into electromagnetic adsorption pond, electromagnetic adsorption pond is divided into low-voltage region, middle voltage regime, high-voltage region is totally three parts, and waste water flows into electromagnetic adsorption pond from low-voltage region, flow through middle voltage regime, flow out electromagnetic adsorption pond from high-voltage region, low-voltage region electrode voltage is set to 5v, and middle voltage regime electrode voltage is set to 20v, high-voltage region electrode voltage is set to 50v, by the electrostatic that electrode produces, be difficult to the fiber removed in planar water, the materials such as hemicellulose, with pump, waste water is squeezed into air flotation pool after process, in pond, flow into subsequent processing device after aeration decomposing organic matter.
2. the pretreatment process of paper mill effluent according to claim 1, is characterized in that, aerated grit chamber selected by settling pit.
3. the pretreatment process of paper mill effluent according to claim 1, is characterized in that, ice foot equipment inner wall is provided with thermal insulation coat.
4. the pretreatment process of paper mill effluent according to claim 1, is characterized in that, the wedge shape ice foot bar quantity that on ice foot equipment two side, interval is fixing is 4-10 root.
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| CN201510506376.4A CN105016559B (en) | 2015-08-18 | 2015-08-18 | A kind of preprocess method of waste water of paper mill |
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| CN201510506376.4A CN105016559B (en) | 2015-08-18 | 2015-08-18 | A kind of preprocess method of waste water of paper mill |
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| CN105016559B CN105016559B (en) | 2017-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986454A (en) * | 2017-04-24 | 2017-07-28 | 浙江海洋大学 | A kind of synchronous nitration and denitrification handles methods of the low C/N than micro- pollution eutrophication water |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993168A (en) * | 2009-08-28 | 2011-03-30 | 王慧怡 | Meat processing waste water treatment process |
| CN102502990A (en) * | 2011-11-03 | 2012-06-20 | 天津市澧沛佳海水娱乐工程有限公司 | System and method for treating wastewater in serious contamination industry |
| WO2014005216A1 (en) * | 2012-07-03 | 2014-01-09 | Veolia Water Solutions & Technologies Support | Metalloid contaminated water solution purification process for safe human consumption-rated reduction of contaminant concentration therein, by precipitation without oxidation |
| CN105060626A (en) * | 2015-08-03 | 2015-11-18 | 富阳鸿祥技术服务有限公司 | Paper mill production wastewater treatment method |
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2015
- 2015-08-18 CN CN201510506376.4A patent/CN105016559B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993168A (en) * | 2009-08-28 | 2011-03-30 | 王慧怡 | Meat processing waste water treatment process |
| CN102502990A (en) * | 2011-11-03 | 2012-06-20 | 天津市澧沛佳海水娱乐工程有限公司 | System and method for treating wastewater in serious contamination industry |
| WO2014005216A1 (en) * | 2012-07-03 | 2014-01-09 | Veolia Water Solutions & Technologies Support | Metalloid contaminated water solution purification process for safe human consumption-rated reduction of contaminant concentration therein, by precipitation without oxidation |
| CN105060626A (en) * | 2015-08-03 | 2015-11-18 | 富阳鸿祥技术服务有限公司 | Paper mill production wastewater treatment method |
Non-Patent Citations (2)
| Title |
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| 刘敬勇: "《环境监测实验》", 30 June 2012 * |
| 王金坑: "《入海污染物总量控制技术与方法》", 31 March 2013 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986454A (en) * | 2017-04-24 | 2017-07-28 | 浙江海洋大学 | A kind of synchronous nitration and denitrification handles methods of the low C/N than micro- pollution eutrophication water |
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| CN105016559B (en) | 2017-04-05 |
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Inventor after: Ji Yao Inventor after: Cheng Zhangjianing Inventor before: Ye Cheng |
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Effective date of registration: 20170307 Address after: Xikang Road, Gulou District of Nanjing city in Jiangsu province 210024 District No. 3 Building 4 room 103 Applicant after: Ji Yao Address before: Ma Shi Jie, Shangcheng District in Hangzhou city Zhejiang province 310012 155 unit 2, Room 401 Applicant before: Hangzhou Qi Cheng Science and Technology Ltd. |
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Effective date of registration: 20191028 Address after: 314500 Guangming Road, Tongxiang Economic Development Zone, Jiaxing City, Zhejiang Province Patentee after: Tongxiang Hengyi Paper Plastic Co., Ltd. Address before: Xikang Road, Gulou District of Nanjing city in Jiangsu province 210024 District No. 3 Building 4 room 103 Patentee before: Qu Yao |