CN103964621A - Treating and resourceful recycling system and method for scouring waste water - Google Patents
Treating and resourceful recycling system and method for scouring waste water Download PDFInfo
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Abstract
The invention provides a treating and resourceful recycling system and method for scouring waste water. The treating object of the system and method is scouring waste water in industries like textiles, papermaking and printing and dyeing. The method main adopts the principle of integrated novel technology of waste water pretreatment, evaporative concentration, flocculation extraction and recycling. The method is characterized by comprising the following steps: pretreatment (I) of scouring waste water so as to realize deposition, preliminary filtering and saponification of scouring waste water; evaporative concentration (II) of pretreated waste water so as to recover heat energy in waste water and increase solid content of waste water; flocculation extraction (III) of waste water having undergone evaporative concentration so as to separate organic matters like pectin and hemicellulose in waste water and further increase the concentration of alkali lye in waste water; and recycling (IV) of separated organic matters and alkali lye. The method can be used in treating and resourceful recycling equipment for scouring waste water, is convenient for engineering realization and has high cost performance.
Description
Technical field
The present invention relates to weaving, papermaking, industry waste water resource recycling equipment field, particularly a kind of processing of boiled-off waste water and the resource recycling system and methods such as printing and dyeing.
Background technology
Along with the fast development of modern industry, the continuous expansion of city size, wastewater discharge also constantly increases.According to statistics, 2008, China's discharged volume of industrial waste water was 241.7 hundred million tons, accounts for 42.3% of wastewater emission amount.At present national dirty waste water year approximately 62,000,000,000 tons of total emission volumns, trade effluent accounts for 66%, the boiled-off waste water quantity discharged ratio of the industries such as the bast fibre spinning wherein developing rapidly in recent years, printing and dyeing, papermaking increases greatly.The pollutant component of boiled-off waste water is complicated, and concentration range is wide, and fluctuation is large, and biological degradation is difficult, and toxic pollutant species is many, concentration is large, and these outstanding features of boiled-off waste water have determined tupe and the treatment process that it is complicated.And boiled-off waste water unprocessed or not up to standard is directly entered to waters, rivers storehouse, and may cause environmental pollution, to society, cause irremediable financial loss and harm.
China's boiled-off waste water treatment process mainly contains chemical method and biological process at present.Utilize chemical Treatment boiled-off waste water, in belonging to and glallzing, can produce a large amount of mud, and effluent color dilution is large, COD is high, adopt separately the method can not reach discharging standards.Utilize biological process to process boiled-off waste water, belong to microorganism decomposition method, its technical process is long, and sewage treatment equipment is complicated, disposable having high input, running expense is high, and at the middle water outlet obnoxious flavour that is exposed to the sun, microbial bacteria is because being subject to the impact of the natural condition such as temperature, oxygen, the degeneration of bacterial classification itself and miscellaneous bacteria are invaded boiled-off waste water are exerted an influence, environment is caused to secondary pollution, should not generally adopt.Therefore, the boiled-off waste water processing problem of current most of enterprise fails to be well solved, and is restricting significantly processing enterprise.
Papermaking boiled-off waste water treatment process, generally adopts combustion method.Its technical process is that waste water is first after desiliconization saponification is processed, through vaporizer, carry out evaporation concentration, during to solid matter, content reaches 50%, by roasting kiln, burn, hemicellulose and pectin burn again, remaining white powder, carry out again after causticization is processed reclaiming caustic soda, although this method has realized wastewater zero discharge, investment is large, and more than 3000 ~ 4,000 ten thousand yuan of sewage treatment equipments need to be invested in a medium-sized paper mill.Serious waste of resources, the resources such as the heat energy in waste water, pectin, hemicellulose do not reclaim to be got up to utilize, and need to expend a large amount of steam raising waste water, and energy expenditure is large, and produces again boiler wastewater and waste gas etc.The more important thing is that caustic soda cost recovery is high, reclaiming one ton of caustic soda approximately needs more than 4000 yuan of production cost, and the market value of caustic soda only has more than 2000 yuan.Therefore, the waste water in many paper mills does not have processing owing to having influence on enterprise profit, and directly the phenomenon of discharge happens occasionally.
In current China grass degumming production technique, generally adopt the production technique of chemical China grass degumming, adopt high temperature, high pressure, production of high concentration caustic soda to carry out long boiling-off repeatedly to ramee, not only expend the precious resources such as a large amount of water, electricity, gas, industrial chemicals, but also produce a large amount of waste water, waste gas, be difficult to process, this just must bring a large amount of pollutions to social environment.Produce one ton of degummed ramie and approximately consume more than 500 ton, water, consume 1.8 tons, coal, consume 0.4 ton of caustic soda and industrial chemicals.Consume electricity more than 200 degree.Due at present to degumming waste water, go back the more satisfactory improvement method of neither one, general or Bian processes the method combining with emblem biological and chemical, this treatment process not only needs to invest up to ten million units and sets up a wastewater treatment plant, and technical process is long, processing cost expense is high, serious waste of resources sometimes can't qualified discharge, will inevitably bring serious pollution to social environment.
In recent years, the domestic patent to waste water resource recycling has: " boiler blow-off waste thermal wastewater retrieving arrangement (application number: CN201020546020.6) ", adopt boiler blow-off waste thermal wastewater recovery method to carry out secondary recovery recycling to boiler blow-off waste thermal wastewater, realize the abundant recycling of save energy and water resources; " heat energy in dyeing waste water and water comprehensive recovering process and heat exchanger (application number: CN200810072499.1) ", heat energy and water comprehensive recovering process and heat change method in a kind of dyeing waste water are provided, water resources and heat energy have been reclaimed; " change spinning mill's Waste Water Treatment and treatment process (application number: CN201010516226.9) ", adopt a kind of stable effluent quality reusableization spinning mill Waste Water Treatment and treatment process, mainly solve some technical problems that existing textile of chemical fibre treatment scheme exists.Applicant was previously invented " evaporation boiler for boiling waste water " (application number: CN200910062419.9), the cardinal principle of this boiler is that the waste water in boiling-off is directly carried out to Waste water concentrating as the method for boiler feed water after silica removal is processed, and can effectively save boiler feed water, steam coal and reclaim the heat energy in boiled-off waste water.Yet the method proposing in above-mentioned patent, although can effectively reclaim water resources and heat energy, can not reclaim and recycling the organism such as " pectin and hemicelluloses " in boiled-off waste water and inorganics " caustic soda ".Therefore, applicant, on the basis of previous patent (being evaporation boiler for boiling waste water), proposes a kind of processing and resource recycling system and method for boiled-off waste water.
Summary of the invention
Technical problem to be solved by this invention is: in order to overcome above-mentioned the deficiencies in the prior art, for current domestic bast fibre spinning, printing and dyeing, the industries such as papermaking are the ubiquity energy in processing trade effluent, resource is recycling fully, the problems such as the large and wastewater treatment running cost height of waste water disposal facility infusion of financial resources, a kind of processing and resource recycling system and method for boiled-off waste water are provided, waste water after boiling-off is processed is directly as boiler feed water, by the heat energy in boiled-off waste water, water resources, organism and inorganics recycling, its economic benefit is obvious.
The present invention solves its technical problem and adopts following technical scheme:
The processing of boiled-off waste water provided by the invention and resource reutilization system, be by Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling installation composition, is specially:
Described sewage pretreatment device comprises that waste water deposits tank, waste water saponification treatment unit, wherein: the import that waste water is deposited tank is connected with the outlet of cooking pot through water pump, the outlet that waste water is deposited tank is connected with the import of waste water saponification treatment unit through water pump, and the outlet of waste water saponification treatment unit is connected with the import of waste water evaporation boiler through water pump;
Described evaporation concentration equipment comprises waste water evaporation boiler, thickened waste water pot, wherein: the wastewater outlet of waste water evaporation boiler is connected with the import of thickened waste water pot through water pump; The steam producing of waste water evaporation boiler is passed in cooking pot;
Described flocculation extraction equipment comprises flocculation plant, waste water separator, buck hold-up vessel, pectin, hemicellulose tank, wherein: the import of flocculation plant is connected with the outlet of thickened waste water pot through water pump, the outlet of flocculation plant is connected with the import of waste water separator through water pump, and the outlet of waste water separator is connected with the import of buck hold-up vessel through water pump; The outlet of pectin, hemicellulose tank is directly connected with dryer;
Described recycling device comprises buck treatment facility, dryer.
Described buck treatment facility comprises that buck treatment unit, buck deposit tank, wherein: the import of buck treatment unit is connected with the outlet of buck hold-up vessel through water pump, the import that the outlet of buck treatment unit is deposited tank through water pump and buck is connected, and the outlet that buck is deposited tank is connected with cooking pot through water pump.
The processing of boiled-off waste water provided by the invention and resource reutilization method, it utilizes the processing of above-mentioned boiled-off waste water and resource reutilization system to realize.
The processing of boiled-off waste water provided by the invention and resource reutilization method, specifically can adopt the method for following steps:
(1) Wastewater Pretreatment:
Be specially: the waste water in cooking pot is deposited tank by waste water and stored, when reaching certain capacity, waste water deposited to waste water in tank and be sent to waste water saponification treatment unit and carry out saponification processing, through pretreated waste water, be sent to waste water evaporation boiler;
(2) evaporation concentration:
Specifically: through pretreated waste water, be sent to waste water evaporation boiler, this boiler make evaporation after solid by original lower aq bring up to >=ten times, the water temperature of boiler also significantly improves simultaneously, realizes the evaporation concentration of waste water, and the concentrated waste water of formation is sent to thickened waste water pot; The steam that waste water evaporation boiler produces in evaporating waste water process is for the production of the boiling-off in process and stoving process;
(3) flocculation is extracted:
Specifically: the concentrated waste water after the evaporation of waste water evaporation boiler, being sent to flocculation plant processes, with waste water separator, filter again, agglomerating pectin and the hemicellulose organism separation and Extraction from waste water of flocculation out deposited in pectin, hemicellulose tank, and the waste water that contains caustic soda under Retained is sent into buck hold-up vessel;
(4) recycling:
Specifically: the waste water in buck hold-up vessel is sent into after buck treatment facility is processed and reused for cooking pot; Pectin hemicellulose drying machine in pectin, hemicellulose tank dry after as feed;
Through above-mentioned steps, realize processing and the resource reutilization of boiled-off waste water.
The present invention adopts Controlling System, can realize the co-ordination between Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling.
Described Controlling System can adopt industrial programmable logic controller.
In above-mentioned evaporating concentration process, the total alkalinity of boiled-off waste water is brought up to 7.52 * 10 after concentrated by the 1mg/L before processing
3mg/L, the total residue after boiled-off waste water is concentrated is 2.82 * 10
4mg/L, for the post-processed of boiled-off waste water is created favourable condition.
Described waste water evaporation boiler can adopt a kind of can be incessantly, continuously boiled-off waste water is carried out the boiler of evaporation concentration, to reclaim the heat energy 75-80% in boiled-off waste water, recycle-water resource 90-95% simultaneously.
Aforesaid method provided by the invention, its purposes is: in the processing of weaving, papermaking or dyeing waste water and the application in resource recycling, make described waste water after treatment as boiler feed water, reclaim the steam in evaporating concentration process, for the production of the boiling-off in process and stoving process, and isolated organism and inorganics also can be realized the recycling of resource.
The present invention compared with prior art has following major advantage:
Can realize " processing of boiled-off waste water and resource reutilization " function simultaneously, improve better on the whole the utilization ratio of the materials such as heat energy, pectin, hemicellulose, caustic soda, energy-saving and cost-reducing, be convenient to Project Realization, cost performance is high.Specific as follows:
(1) adopt a kind of can be incessantly, continuously boiled-off waste water is carried out the New-type boiler of evaporation concentration, boiled-off waste water is carried out after the processing of some necessity, waste water is directly evaporated as boiler feed water, and the steam that evaporation boiler produces in evaporating waste water process can be used for the techniques such as boiling-off in production process and oven dry.Solid after boiler evaporating again through flocculence by after the flocculation of pectin and hemicellulose, then filter with high mesh filter screen, agglomerating pectin and the hemicellulose that flocculate separated from waste water, as biological fodder; Remaining next buck can be used as again boiling-off and uses, thereby the water temperature of boiler is improved, and realizes energy recovery recycling.
(2) adopt a kind of can be incessantly, continuously boiled-off waste water is carried out the New-type boiler of evaporation concentration, can be in evaporating concentration process, it is concentrated rear that the total alkalinity of boiled-off waste water is brought up to 7.52 * 103mg/L(by the 1mg/L before processing), total residue after it is concentrated is 2.82 * 103mg/L, for the post-processed of boiled-off waste water is created favourable condition.Boiled-off waste water can be met after treatment as boiler feed water, can reclaim the heat energy 75-80% in boiled-off waste water, simultaneously recycle-water resource 90-95%.
(3) not only can save a large amount of steam coals, water, save the needed production cost of concentrated waste water, comprise the biochemistry of waste water, photochemical treatment facility and the processing cost of waiting.Various organic and inorganic substance in waste water after concentrated, after certain processing, just all recyclings, realize the energy, resources circulation recycling in waste water, and Neng Wei enterprise brings larger economic benefit.Therefore, this method of wastewater treatment is at present domestic and international a kind of more advanced boiled-off waste water treatment process, its success of the test brings larger economic benefit will to enterprise and society, has larger popularizing value and wide domestic and international market development prospect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention's " a kind of processing of boiled-off waste water and resource recycling system and method ".
In figure: 1. cooking pot; 2. waste water evaporation boiler; 3. thickened waste water pot; 4. flocculation plant; 5. waste water separator; 6. pectin, hemicellulose tank; 7. dryer; 8. buck hold-up vessel; 9. buck treatment unit; 10. buck is deposited tank; 11. waste water are deposited tank; 12. waste water saponification treatment unit; 13. Controlling System; 14-23. water pump.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, but do not limit the present invention.
The present embodiment provides processing and the resource reutilization system of boiled-off waste water, is by Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling installation composition, referring to Fig. 1, is specially:
Described wastewater treatment equipment, it forms as shown in Figure 1, deposits tank 11, waste water saponification treatment unit 12 and 3 water pumps be comprised of waste water.Wherein: the import that the outlet of cooking pot 1 (liquid flowing out is the waste water in cooking pot) is deposited tank 11 through water pump 21 and waste water is connected, the outlet that waste water is deposited tank 11 is connected with the import of waste water saponification treatment unit 12 through water pump 22, and the outlet of waste water saponification treatment unit 12 is connected with the import of waste water evaporation boiler 2 through water pump 23.
Described evaporation concentration equipment, it forms as shown in Figure 1, waste water evaporation boiler 2, thickened waste water pot 3 and water pump 14, consists of.Wherein, the wastewater outlet of waste water evaporation boiler 2 is connected with the import of thickened waste water pot 3 through water pump 14; The steam producing of waste water evaporation boiler 2 is passed in cooking pot 1.
Described flocculation extraction equipment, it forms as shown in Figure 1, flocculation plant 4, waste water separator 5, buck hold-up vessel 8, pectin, hemicellulose tank 6 and water pump 15-17, consists of.Wherein: the import of flocculation plant 4 is connected with the outlet of thickened waste water pot 3 through water pump 15, the outlet of flocculation plant 4 is connected with the import of waste water separator 5 through water pump 16.The outlet of waste water separator 5 is connected with the import of buck hold-up vessel 8 through water pump 17.The outlet of pectin, hemicellulose tank 6 is directly connected with dryer 7.
Described buck treatment facility, it forms as shown in Figure 1, by buck treatment unit 9, buck, deposits tank 10 and water pump 18-20 forms.Wherein, the import of buck treatment unit 9 is connected with the outlet of buck hold-up vessel 8 through water pump 18, and the import that the outlet of buck treatment unit 9 is deposited tank 10 through water pump 19 and buck is connected, and the outlet that buck is deposited tank 10 is connected with cooking pot 1 through water pump 20.
Co-ordination between above-mentioned sewage pretreatment device, evaporation concentration equipment, flocculation extraction equipment, buck treatment facility, dryer is realized by Controlling System 13.Described Controlling System adopts industrial programmable logic controller, and it has realizes the coordinated control function that comprises Wastewater Pretreatment, waste water evaporation, flocculation, waste water separation, buck processing etc.
The processing of boiled-off waste water provided by the invention and resource reutilization method, be by Wastewater Pretreatment, evaporation concentration, flocculation, to extract processing and the resource reutilization that the integral systems such as flocculation, recycling are realized boiled-off waste water by above-mentioned, is specially:
(1) Wastewater Pretreatment:
By sewage pretreatment device, realized, specifically: the waste water in cooking pot 1 is deposited tank 11 by waste water and stored, when reaching certain capacity, the waste water that waste water is deposited to 11 li, tank is sent to waste water saponification treatment unit 12 and carries out saponification processing, through pretreated waste water, is sent to waste water evaporation boiler;
(2) evaporation concentration:
By evaporation concentration equipment, realized, specifically: through pretreated waste water, be sent to waste water evaporation boiler 2, this boiler makes the solid after evaporation be brought up to more than ten times by original lower aq, the water temperature of this boiler also has significantly raising simultaneously, realize the evaporation concentration of waste water, the concentrated waste water of formation is sent to thickened waste water pot 3; The steam that waste water evaporation boiler produces in evaporating waste water process can be used for the techniques such as boiling-off in production process and oven dry;
(3) flocculation is extracted:
By flocculation extraction equipment, realized, specifically: the concentrated waste water after 2 evaporations of waste water evaporation boiler, being sent to flocculation plant 4 processes, with waste water separator 5, filter, by flocculating, organism separation and Extraction from waste water such as agglomerating pectin and hemicellulose out deposit pectin, hemicellulose tank 6 in again; And separation and Extraction goes out after the organism in waste water, the waste water that contains caustic soda under Retained is sent into buck hold-up vessel 8; Described waste water separator 5 can adopt high mesh filter screen, for example 8 mesh filter screens.
(4) recycling:
By realizations such as buck treatment facility, dryers, specifically: in buck hold-up vessel, 8 waste water is sent into after the processing of buck treatment facility, can reuse for cooking pot; The organism drying machines such as pectin hemicellulose 7 that pectin, hemicellulose tank 6 are deposited are packed after drying, recycling, for example, as feed.
Through above-mentioned steps, realize processing and the resource reutilization of boiled-off waste water.
The processing of boiled-off waste water provided by the invention and resource reutilization, its principle and working process are as follows:
Cooking pot 1 produces a large amount of boiled-off waste waters, through water pump 21, deposit waste water and deposit in tank 11, when its waste water completely after water pump 22 take out waste water carry out saponification processing in waste water saponification treatment unit 12, the waste water after processing is extracted into waste water evaporation boiler 2 by water pump 23 and processes; The steam that waste water evaporation boiler 2 produces is passed into cooking pot 1, thereby can heat waste water evaporation boiler, has reclaimed the partial heat energy in boiled-off waste water; And the concentrated waste water that waste water evaporation boiler 2 produces is extracted in thickened waste water pot 3 through water pump 14, be filled with by water pump 15 and be extracted into and in flocculation plant 4, carry out flocculation treatment, process waste water separator 5 separation and Extraction go out pectin, hemicellulose leaves pectin half fiber can 6 in, enter again dryer 7 and carry out drying and processing, finally complete pectin half fiber packing.Waste water after waste water separator 5 extracts leaves in buck hold-up vessel 8 through water pump 17, through water pump 18, enter and in buck treatment unit 9, carry out liquid caustic soda extraction, through water pump 19, leave buck in and deposit in tank 10, finally through water pump 20, get back to cooking pot 1, complete the recycling of caustic soda.According to above processing requirement, complete the design of Controlling System 13, realize the co-ordination between the devices such as Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling.
Described waste water evaporation boiler 2 adopt a kind of can be incessantly, continuously boiled-off waste water is carried out the New-type boiler of evaporation concentration, can be in evaporating concentration process, it is concentrated rear that the total alkalinity of boiled-off waste water is brought up to 7.52 * 103mg/L(by the 1mg/L before processing), total residue after it is concentrated is 2.82 * 103mg/L, for the post-processed of boiled-off waste water is created favourable condition.Boiled-off waste water can be met after treatment as boiler feed water, can reclaim the heat energy 75-80% in boiled-off waste water, simultaneously recycle-water resource 90-95%.
The processing of boiled-off waste water provided by the invention and resource reutilization method, can be used on weaving, papermaking, in the industry waste water resource recycling equipments such as printing and dyeing, make described waste water can be used as after treatment boiler feed water, reclaim the steam in evaporating concentration process, can be used for boiling-off and stoving process in production process, and isolated organism and inorganics also can be realized the recycling of resource.
The processing of boiled-off waste water provided by the invention and resource reutilization method, its innovative point is: " Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling " integrated novel process.Domestic have the processing of waste water and the report of resource reutilization technical elements, but have no the report of relevant " Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling " integrated novel process aspect.Known through Comprehensive Comparison, the processing of boiled-off waste water provided by the present invention is not yet found identical or similar report in pertinent literature at home with the innovative point of resource reutilization method.
Claims (9)
1. the processing of boiled-off waste water and a resource reutilization system, is characterized in that, by Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling installation composition, being specially:
Described sewage pretreatment device (I) comprises that waste water deposits tank (11), waste water saponification treatment unit (12), wherein: the import that waste water is deposited tank (11) is connected with the outlet of cooking pot (1) through water pump, the outlet that waste water is deposited tank (11) is connected with the import of waste water saponification treatment unit (12) through water pump, and the outlet of waste water saponification treatment unit (12) is connected with the import of waste water evaporation boiler (2) through water pump;
Described evaporation concentration equipment (II) comprises waste water evaporation boiler (2), thickened waste water pot (3), wherein: the wastewater outlet of waste water evaporation boiler (2) is connected with the import of thickened waste water pot (3) through water pump; The steam producing of waste water evaporation boiler (2) is passed in cooking pot (1);
Described flocculation extraction equipment (III) comprises flocculation plant (4), waste water separator (5), buck hold-up vessel (8), pectin, hemicellulose tank (6), wherein: the import of flocculation plant (4) is connected with the outlet of thickened waste water pot (3) through water pump, the outlet of flocculation plant (4) is connected with the import of waste water separator (5) through water pump, and the outlet of waste water separator (5) is connected with the import of buck hold-up vessel (8) through water pump; The outlet of pectin, hemicellulose tank (6) is directly connected with dryer (7);
Described recycling device (IV) comprises buck treatment facility, dryer (7).
2. the processing of boiled-off waste water according to claim 1 and resource reutilization system, it is characterized in that described buck treatment facility comprises that buck treatment unit (9), buck deposit tank (10), wherein: the import of buck treatment unit (9) is connected with the outlet of buck hold-up vessel (8) through water pump, the import that the outlet of buck treatment unit (9) is deposited tank (10) through water pump and buck is connected, and the outlet that buck is deposited tank (10) is connected with cooking pot (1) through water pump.
3. the processing of boiled-off waste water and a resource recycling method, is characterized in that utilizing described in claim 1 or 2 that system realizes.
4. the processing of boiled-off waste water and resource reutilization method according to claim 3, is characterized in that adopting following steps:
(1) Wastewater Pretreatment:
Be specially: the waste water in cooking pot (1) is deposited tank (11) by waste water and stored, when reaching certain capacity, waste water is deposited to waste water in tank and be sent to waste water saponification treatment unit (12) and carry out saponification processing, through pretreated waste water, be sent to waste water evaporation boiler (2);
(2) evaporation concentration:
Specifically: through pretreated waste water, be sent to waste water evaporation boiler (2), this boiler make evaporation after solid by original lower aq bring up to >=ten times, the water temperature of boiler also significantly improves simultaneously, realizes the evaporation concentration of waste water, and the concentrated waste water of formation is sent to thickened waste water pot (3); The steam that waste water evaporation boiler produces in evaporating waste water process is for the production of the boiling-off in process and stoving process;
(3) flocculation is extracted:
Specifically: the concentrated waste water after waste water evaporation boiler (2) evaporation, being sent to flocculation plant (4) processes, use again waste water separator (5) to filter, agglomerating pectin and the hemicellulose organism separation and Extraction from waste water of flocculation out deposited in pectin, hemicellulose tank (6), and the waste water that contains caustic soda under Retained is sent into buck hold-up vessel (8);
(4) recycling:
Specifically: the inner waste water of buck hold-up vessel (8) is sent into after buck treatment facility is processed and reused for cooking pot (1); The inner pectin hemicellulose drying machine of pectin, hemicellulose tank (6) dry after as feed;
Through above-mentioned steps, realize processing and the resource reutilization of boiled-off waste water.
5. the processing of boiled-off waste water according to claim 4 and resource reutilization method, is characterized in that: adopt Controlling System, realize the co-ordination between Wastewater Pretreatment, evaporation concentration, flocculation extraction, recycling.
6. the processing of boiled-off waste water according to claim 5 and resource reutilization method, is characterized in that: described Controlling System adopts industrial programmable logic controller.
7. the processing of boiled-off waste water according to claim 4 and resource reutilization method, is characterized in that in evaporating concentration process, and the total alkalinity of boiled-off waste water is brought up to 7.52 * 10 after concentrated by the 1mg/L before processing
3mg/L, the total residue after boiled-off waste water is concentrated is 2.82 * 10
4mg/L, for the post-processed of boiled-off waste water is created favourable condition.
8. the processing of boiled-off waste water according to claim 4 and resource reutilization method, it is characterized in that waste water evaporation boiler (2) adopt a kind of can be incessantly, continuously boiled-off waste water is carried out the boiler of evaporation concentration, to reclaim the heat energy 75-80% in boiled-off waste water, while recycle-water resource 90-95%.
9. the purposes of method described in arbitrary claim in claim 3 to 8, it is characterized in that in the processing of weaving, papermaking or dyeing waste water and the application in resource recycling, make described waste water after treatment as boiler feed water, reclaim the steam in evaporating concentration process, for the production of the boiling-off in process and stoving process, and isolated organism and inorganics also can be realized the recycling of resource.
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| CN109179833A (en) * | 2018-09-06 | 2019-01-11 | 清华大学 | A kind of papermaking sewage zero-emission and resource recycle method based on waste heat driving |
| CN113429086A (en) * | 2021-08-09 | 2021-09-24 | 黑龙江红豆杉亚麻纺织有限公司 | Process for treating production wastewater of hemp |
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| 袁佑新等: ""苎麻煮练废水处理与资源回收再利用方法研究"", 《山东纺织科技》, no. 1, 31 January 2013 (2013-01-31) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179833A (en) * | 2018-09-06 | 2019-01-11 | 清华大学 | A kind of papermaking sewage zero-emission and resource recycle method based on waste heat driving |
| CN109179833B (en) * | 2018-09-06 | 2020-07-07 | 清华大学 | Waste heat drive-based paper mill sewage zero-discharge and resource recovery method |
| CN113429086A (en) * | 2021-08-09 | 2021-09-24 | 黑龙江红豆杉亚麻纺织有限公司 | Process for treating production wastewater of hemp |
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Application publication date: 20140806 |