CN103880238B - A kind of flue gas condensing water treatment device and treatment process - Google Patents
A kind of flue gas condensing water treatment device and treatment process Download PDFInfo
- Publication number
- CN103880238B CN103880238B CN201310483071.7A CN201310483071A CN103880238B CN 103880238 B CN103880238 B CN 103880238B CN 201310483071 A CN201310483071 A CN 201310483071A CN 103880238 B CN103880238 B CN 103880238B
- Authority
- CN
- China
- Prior art keywords
- water
- condensation
- pond
- treatment
- flocculation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to a kind of flue gas condensing water treatment device and treatment process, the equalizing tank in described device is for ensureing the normal operation of Waste Water Treatment; PH regulator pond, for control ph, water-and-oil separator, for air supporting de-oiling; Biochemical Aerobic Pond, for removing the organism in described sewage; The particle being difficult to Direct precipitation is wadded a quilt with cotton into large precipitable particle by coagulation-flocculation pond; Settling tank, precipitates for being formed by the pollutent of flocculation cohesion in coagulation-flocculation pond and is separated; Strainer, for removing suspended substance in water and baregin particle; Interchanger treatment system is used for heating described water of condensation; Reverse osmosis treatment system, for removing the various ions in water of condensation; Sterilization pool, for carrying out disinfection to described water of condensation and decolouring, to carry out reuse or discharge.By device of the present invention or method, the standard water discharge after flue gas condensing water treatment is discharged.
Description
Technical field
The present invention relates to one and be applied in fume treatment field, be specifically related to a kind of flue gas condensing water treatment device and treatment process, be applied to flue gas processing device and the treatment process of consumer waste incineration power plant and various boiler combustion generation.
Background technology
Along with going from bad to worse of ecotope, being treated as of rubbish thinks one of problem of paying close attention to, the solid waste that domestic refuse is mankind's daily life and produces in producing, because output is large, complicated component is various, brings difficulty to disposal and utilization, as do not processed in time or deal with improperly, just pollute the environment, affect environmental health.Refuse treatment will be removed rubbish rapidly exactly, and carries out harmless treatment, is finally reasonably utilized.The waste disposal method of current widespread use is sanitary landfill, During High-Temperature Composting and burning.The object of refuse treatment is innoxious, resource utilization and minimizing.
A large amount of flue gases can be produced in Refuse Incineration Process, but need to process described flue gas, first tail gas after general consumer waste incineration carry out depickling dedusting, discharge after depickling dedusting in flue gas containing a large amount of water vapor, meet condensation with atmosphere and form numerous little droplet, produce the water vapor of white, easily misread into poisonous smog by surrounding resident, thus cause psychology fear to wait detrimentally affect.
In prior art, first depickling is carried out to flue gas, usually depickling spray is sprayed in deacidification, by the acid gas removal in flue gas, then the described flue gas containing saturated steam is further processed, such as by arranging the device (removing white cigarette device) of water vapor removing between induced draft fan and chimney, high-temperature vapor condensation in flue gas is discharged, but turbidity, oxygen-consumption COD in described condensation waste water
cr, TDS, BOD
5, NH
3the substances content such as-N, nitrate, vitriol, iron, manganese, all beyond the standard of reutilization of the sewage in GB19923-2005, can not realize reuse, and if directly discharge will inevitably cause the pollution of environment, cause the waste of resource simultaneously.
Not only water of condensation can be produced in flue gas of refuse burning treatment process, the problem of water of condensation process is there is equally in other boiler combustions and heat-exchange system, but the method not for water of condensation process in prior art, because flue gas condensing impurities in water material composition and sewage have very large difference, select existing sewage water treatment method not only can not obtain good treatment effect, and improve water of condensation processing cost.
Therefore, although there is the treatment process of various sewage in prior art, but because water of condensation and sewage composition exist very big difference, all can not reach good treatment effect, obtain optimum economic benefit, the feature for water of condensation is needed to design, to solve the drawback that prior art can not process water of condensation.
Summary of the invention
In summary of the invention part, introduce the concept of a series of reduced form, this will further describe in embodiment part.Summary of the invention part of the present invention does not also mean that the key feature and essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain attempting to determine technical scheme required for protection.
The invention provides a kind of flue gas condensing water treatment device, comprise be communicated with successively equalizing tank, pH regulator pond, water-and-oil separator, biochemical Aerobic Pond, coagulation-flocculation pond, settling tank, strainer, interchanger treatment system, reverse osmosis treatment system and sterilization pool, wherein:
Described equalizing tank, for improving the surge capability to organic loading, prevents the sharply change for the treatment of system load, to ensure the normal operation of Waste Water Treatment;
Described pH regulator pond, for control ph, is adjusted to alkalescence by described water of condensation, to reduce the consumption neutralizing the chemical needed;
Described water-and-oil separator, for regulating pondage and air blast, to realize the profit layering in sewage in advance, then air supporting de-oiling simultaneously to described sewage oxygenation;
Described biochemical Aerobic Pond, for carrying out continuous aerobic biochemical to described sewage, to remove the organism in described sewage;
Described coagulation-flocculation pond, the particle being difficult to Direct precipitation is wadded a quilt with cotton into large precipitable particle by the effect of being caught by compression double electric layer, adsorption bridging, absorption charge neutrality throw out net, reaches the object of clarification water quality;
Described settling tank, precipitates for being formed by the pollutent of flocculation cohesion in described coagulation-flocculation pond and is separated;
Described strainer, for removing suspended substance in water and baregin particle, to reduce the turbidity of water;
Described interchanger treatment system, for heating described water of condensation, improves the temperature of described water of condensation, improves follow-up reverse osmosis effect;
Described reverse osmosis treatment system, for removing the various ions in water of condensation, to reduce the corrodibility of described water of condensation while reaching emission request;
Described sterilization pool, for carrying out disinfection to described water of condensation and decolouring, to carry out reuse or discharge.
As preferably, radical sedimentation basin selected by described settling tank, is provided with surge pump and mud scraper in described settling tank.
As preferably, described water-and-oil separator comprises gas blower, water pump machine, oil and water filters and oil slick machine.
As preferably, pH readjustment pond is also provided with between described settling tank and described strainer, described pH adjusts back in pond and is provided with medicine-adding bin, dosing pump, reaction machine mixer and pH meter, wherein said medicine-adding bin, dosing pump are used for adding acid reagent, to regulate the pH of described water of condensation to described pH regulator pond.
As preferably, described strainer comprises sand-bed filter and the carbon filter of series connection, is provided with backwash water pump and autocontrol valve in described strainer, realizes the automatic control of described strainer.
As preferably, between described pH readjustment pond and described strainer, be also provided with Buffer Pool, for the water outlet of settlement on storage pond, be also provided with in described Buffer Pool and filter lift pump and ball float.
As preferably, described reverse osmosis treatment system comprises reverse osmosis group film, electrical conductivity meter, Scale inhibitors medicine-adding bin, Scale inhibitors dosing pump and high-pressure pump.
As preferably, described interchanger treatment system is used for heating described water of condensation, and improve water temperature to 25 in winter and spend, increase the producing water ratio of reverse osmosis treatment system, described interchanger treatment system comprises interchanger, steam control valve group.
As preferably, described reverse osmosis treatment system is communicated with filtered water tank and dense water tank respectively, wherein said cleaning water tank, for storing rinse water, is provided with flushing water pump, ball float and accurate filter in described cleaning water tank, and described dense water tank is communicated with reuse pool and reverse osmosis treatment system is communicated with.
As preferably, described device also comprises sludge treating system, and described sludge treating system is connected with described settling tank, and described sludge treating system comprises sludge thickener and plate-and-frame filter press.
Present invention also offers a kind for the treatment of process of flue gas condensing water, comprising:
Step (1) carries out the adjustment of the water yield and water quality to described water of condensation, to improve the surge capability to organic loading, prevent the sharply change for the treatment of system load, ensures the normal operation of Waste Water Treatment;
Step (2) pH to described water of condensation regulates, and is controlled by pH 7.5 ~ 8.5, and to make coagulant aids, flocculation agent react under weak basic condition, to make in subsequent treatment process stable carries out;
Step (3) is carried out air blast to described water of condensation and is passed into air, and in advance described water of condensation oxygenation is realized simultaneously to the profit layering in sewage, the lift-off oil of promoting the circulation of qi of going forward side by side, removes the oil-containing impurity in described water of condensation;
Step (4) carries out biology aerobic process to described water of condensation, to decompose the organism removed in described water of condensation;
Step (5) adds coagulating agent and flocculation agent carries out coagulation and flocculation treatment to described water of condensation, the particle being difficult to Direct precipitation is wadded a quilt with cotton into large precipitable particle, to reduce the turbidity of described water of condensation by the effect of being caught by the compression double electric layer of described coagulating agent and described flocculation agent, adsorption bridging, absorption charge neutrality throw out net;
Step (6) described water of condensation enters in described settling tank, and along radial direction to pond Zhou Liudong, suspended substance is sedimentation in flowing, and enter sludge reaction pond along pond bottom sloping, primary water overflows water channel from pond week, to carry out solid-liquid separation, reduces described condensation water pollutant index;
Step (7) carries out filtration treatment to described water of condensation, to remove suspended substance in described removal water and baregin particle, reduces the turbidity of water;
Step (8) heats described water of condensation, improves described condensation water problem, improves follow-up reverse osmosis effect;
Step (9) selects the various ions in reverse osmosis treatment system removal water of condensation, to reach the corrodibility that emission request reduces described water of condensation simultaneously;
Step (10) carries out disinfection to described water of condensation and decolours, to reach discharge or reuse standard.
As preferably, in described step (2), add the pH of sodium hydroxide reagent to described water of condensation regulate.
As preferably, described step adds negative polyacrylamide in (5), under weak basic condition, carry out coagulating treatment.
As preferably, add polymerize aluminum chloride in described step (5) and carry out flocculation treatment as flocculation agent.
As preferably, described step (6) comprises following sub-step:
(6-1) contaminant particle formed in described coagulation and flocculation treatment is precipitated, form mud, and described mud is separated with water of condensation;
(6-2) described mud is carried out concentration, the supernatant liquor obtained turns back in step (1) and proceeds process, and the mud obtained is recycled.
As preferably, in described step (6-2), plate-and-frame filter press is selected to carry out concentration to described mud.
As preferably, described step (7) comprises following two sub-steps:
(7-1) described water of condensation is filtered through sand-bed filter, remove the suspended substance in described water of condensation;
(7-2) described water of condensation is filtered through carbon filter, remove the baregin particle in described water of condensation.
As preferably, between described step (6) and step (7), also comprise the step of pH readjustment.
As preferably, in described step (7), remove the various ions in water of condensation by reverse osmosis membrane.
Device of the present invention and treatment process have the following advantages:
1) sewage treatment facility has larger adaptability, anti impulsion load, can meet the change of certain water quality, the water yield.
2) adopt advanced and mature sewage treatment process, after sewage disposal, every effluent quality index all reaches " recirculated cooling water Standard of reclaimed water ".
3) equipment takes into account versatility with advanced, and stable equipment operation of the present invention is reliable, efficiency is high, convenient management, maintenance maintenance workload are few, moderate.
4) sewage treatment facility running is stable, working cost is low, management maintenance is convenient, operation automation, and labour intensity reduces, and efficiency is high.
5) sewage plant is rationally distributed, sewage disposal is compact, attractive in appearance beautiful, coordinate with existing environment is unified.
6) little on the impact of surrounding environment, energy conservative control noise, smell, deal carefully with and disposal of solid waste, can not cause secondary pollution.
Accompanying drawing explanation
Following accompanying drawing of the present invention in this as a part of the present invention for understanding the present invention.Shown in the drawings of embodiments of the invention and description thereof, be used for explaining principle of the present invention.In the accompanying drawings,
Fig. 1 shows the process flow sheet of one embodiment of the present invention;
Fig. 2 shows the structural representation for the treatment of unit described in one embodiment of the present invention.
Accompanying drawing identifies
1, equalizing tank 2, pH regulator pond 3, coagulation basin
4, flocculation basin 5, settling tank 6, pH adjust back pond
7, Buffer Pool 8, sand-bed filter 9, carbon filter
10, accurate filter 11, RO treatment system 12, filtered water tank
Embodiment
In the following description, a large amount of concrete details is given to provide more thorough understanding of the invention.But, it will be apparent to one skilled in the art that the present invention can be implemented without the need to these details one or more.In other example, in order to avoid obscuring with the present invention, technical characteristics more well known in the art are not described.
Below in conjunction with accompanying drawing, the treatment unit of flue gas condensing water of the present invention and method are described further.
Device of the present invention comprises condensate processor, at least comprises waste disposal plant in described device, and as preferably, described condensate processor comprises sewage disposal and sludge treatment and sludge disposal two parts.
The water yield and the part Pollutant levels of waste water are two factors associated each other, in the comprehensive wastewater water yield that need process and production process, the water yield has direct relation, and when the water yield is large, sewage pollution substrate concentration can reduce, control section pollutent enters in waste water, and Pollutant levels can be controlled.
Wherein, described waste disposal plant is according to the water yield, variation of water, and in conjunction with the specific situation of sewage itself, selection technique is ripe, economical rationality, flexible operation, and management maintenance is convenient, the scheme that treatment effect is stable.Wherein produce mud in sewage treatment process, should stabilizing treatment be carried out, prevent from causing secondary pollution to environment; And properly consider the ultimate disposal of mud.Mud is entrusted related personnel to transport environmental protection and is disposed after pressure filter press filtration.
Condensate processor of the present invention at least comprises waste water regulon, coagulation-flocculation unit, precipitation unit, filtering unit.
Particularly, described treatment unit comprise be interconnected equalizing tank 1, pH regulator pond 2, water-and-oil separator (not shown), biochemical Aerobic Pond (not shown), coagulation basin 3, flocculation basin 4, settling tank 5, Buffer Pool 7, strainer, interchanger treatment system (not shown), reverse osmosis treatment system 11, as shown in Figure 2.
Below each unit in described device is described in detail,
(1) described equalizing tank 1 is homogenizing equalizing tank in order to the homogenizing of the adjustment and water quality of carrying out the water yield, to ensure the normal operation of Waste Water Treatment.
Described homogenizing equalizing tank 1 has regulating effect, provides the surge capability to organic loading, prevents the sharply change for the treatment of system load; Control ph, to reduce the consumption neutralizing the chemical needed; When production plant stops production, still input waste water can be continued to treatment system.
No matter be trade effluent, or municipal effluent or sanitary sewage, the water yield and water quality had fluctuation within 24 hours.This change is to sewage disposal device, and particularly biological treating equipment normally plays its purification function is disadvantageous, even also may be destroyed.Same for materializing strategy equipment, the fluctuation of the water yield and water quality is larger, and process parameter is difficult to control, and treatment effect is more unstable; Otherwise fluctuate less, effect is more stable.In this case, before Waste Water Treatment, homogenizing equalizing tank 1 is set, in order to the homogenizing of the adjustment and water quality of carrying out the water yield, to ensure the normal operation of Waste Water Treatment.In addition, acid waste water and alkaline waste water can in equalizing tank 1 in and; The hot wastewater that short-term is discharged also can carry out balancing water temperature by equalizing tank 1.
The object of regulating effect in waste water disposal facility: provide the surge capability to organic loading, prevents the sharply change for the treatment of system load; Control ph, to reduce the consumption neutralizing the chemical needed; When production plant stops production, still input waste water can be continued to treatment system; Prevent high density matter from entering treatment system.
Usually mix in equalizing tank 1, its objective is and will ensure regulating effect.Conventional blending means comprises: water pump pump circulation, pneumatic blending, mechanical stirring, the diversion of perforation diversion trench.This engineering we adopt mechanical stirring, stirrer arm is that double-layer double-direction lining plastic matter stirs bar.
In an embodiment of the present invention, described equalizing tank 1 is of a size of 8600 × 4000 × 14000 (mm), and its useful volume is 392m
3, available depth is 3.5m, HRT(HydraulicRetention Time) and refer to that the mean residence time for the treatment of sewage in reactor is 4h.
As preferably, be also provided with lift pump, equalizing tank stirrer and ball float in described equalizing tank 1, wherein said equalizing tank stirrer stirs long 3 meters of bar, and power is 7.5kw, and rotating speed is 80 revs/min.
(2) described pH regulator pond 2 is for the pH neutralization reaction of condensation sewage, and described condensation sewage is adjusted to alkalescence.
Particularly, in described pH regulator pond 2, add the pH of alkaline reagents to sewage regulate, PAC, PAM are reacted under weak basic condition, to make in subsequent treatment process stable carries out, particularly, add the pH of sodium hydroxide reagent to sewage and regulate, pH controls 7.5 ~ 8.5.
In an embodiment of the present invention, described pH regulator pond 2 is of a size of 4000 × 4000 × 4000 (mm), and useful volume is 56m
3, HRT is 0.50hr.As preferably, medicine-adding bin, dosing pump, reaction machine mixer and pH meter is provided with in described pH regulator pond 2, wherein said medicine-adding bin, dosing pump are used for adding alkaline reagents to described pH regulator pond 2, described reaction machine mixer is used for stirring to make pH in described pH regulator pond 2 have homogeneity, is monitored pH in described pH regulator pond 2 by pH meter.
(3) described water-and-oil separator, for regulating pondage and air blast, to realize the profit layering in sewage in advance, then air supporting de-oiling simultaneously to described sewage oxygenation.
Described oily-water seperating equipment, can not only oil in recycle-water, increase added value and water of condensation purify further, oily-water seperating equipment, this separator is on the basis of separating machine, and the character for this oil-containing water of condensation is carried out redesign and formed, and main improvement is as follows: the rotating speed of rotary drum is by original 12000 revs/min, be adjusted to 8000-10000 rev/min, regulate according to oil content of wastewater; The height of rotary drum intra vane is redesigned, changes 600 millimeters into by original 800 millimeters; Feed liquor oral pore is redesigned, by original diameter 6 millimeters, changes diameter 3 millimeters to 4 millimeters into, regulate according to oil content of wastewater.
Its principle is the difference with its proportion, is separated under the influence of centrifugal force, and it is formed primarily of support, transmission mechanism, rotary drum, catch tray, fluid inlet composition.Oil-containing water of condensation injects the rotary drum of high speed rotating by bottom liquid inlet mouth, rotary drum forms powerful centrifugal force after driving band rotor blade that oil-water mixture is rotated, its profit is separated because of the existence of its density difference under the influence of centrifugal force, the water separated enters water-collecting tray through rotary drum passage, discharge from water-collecting tray, the oil separated enters save oil pan through rotary drum passage, discharges from save oil pan, minority large particulate matter sinks to rotatory drum wall bottom, discharges from sewage draining exit.Its advantage: oil is separated from water, separation rate is 99%.
(4) biochemical Aerobic Pond, for carrying out continuous aerobic biochemical to described sewage, to remove the organism in described sewage.
After de-oiling, water of condensation enters biochemical oxidation pond, in biochemical Aerobic Pond, carry out continuous aerobic biochemical, in this step by organonitrogen and ammonia-state nitrogen ammonifying bacteria, nitrococcus and Nitromonas effect under nitrogen is finally converted into nitric nitrogen.
The control of DO value is very crucial in this step, the too low activity of activated sludge that makes of the level of dissolved oxygen reduces, can suppress biological to organic degraded, produce sludge bulking, but too high can the acceleration of dissolved oxygen consumes the organism in sewage, makes microorganism for want of nutrition and causes the aging of active sludge, dissolved oxygen too high for a long time can reduce flocculation row performance and the adsorptive power of active sludge, increase energy consumption, solid jet blast aeration in nitrification tank of the present invention, control DO is between 2 ~ 5mg/L.
(5) described coagulation basin 3 is for condensing particulate matter flocculation, reduces turbidity.
Particularly, the particle these being difficult to Direct precipitation by the effect of catching etc. of compression double electric layer, adsorption bridging, absorption charge neutrality throw out net in described coagulation basin 3 wads a quilt with cotton into large precipitable particle, thus reaches the object of clarification water quality.As preferably, described coagulating agent uses negative polyacrylamide (PAM), carries out under weak basic condition.
(6) in described flocculation basin 4 for by flocculation after suspended particulate increase, cohesion conform to, reach the object of decolouring, solid-liquid separation.
In described flocculation basin 4, add flocculation agent, to make the suspended particulate after flocculation increase, cohesion conforms to, and preferably uses polymerize aluminum chloride (PAC) as flocculation agent.
In one embodiment of the invention, described coagulation basin 3 and described flocculation basin 4 are that a pond body is divided into two portions, and the described pond decorum is called coagulation-flocculation pond 4, and coagulation basin 3 and flocculation basin 4 liang of lattice are divided in described coagulation-flocculation pond, and two lattice are independent of one another and be interconnected.
As preferably, reaction machine mixer, medicine-adding bin, dosing pump and dosing machine mixer is provided with in described coagulation basin 3 and described flocculation basin 4, wherein said medicine-adding bin, dosing pump are used for adding coagulating agent and flocculation agent in described coagulation basin 3 and described flocculation basin 4, described reaction machine mixer is used for stirring to make various particle in described coagulation basin 3 and described flocculation basin 4 fully react, to form flocculation and precipitation.
(7) described settling tank 5 is for the pollutent precipitation will formed in flocculation basin 4, reduces pollutent index.
Particularly, enter described settling tank 5 after sewage flocculation reaction, further some pollutents are precipitated, thus reduce COD further, the pollutent indexs such as SS, BOD, in described settling tank 5, be provided with surge pump and mud scraper.
Radical sedimentation basin is selected as preferred described settling tank 5, in described radical sedimentation basin, waste water enters pond from center, pond water inlet pipe, and along radial direction to pond Zhou Liudong, suspended substance is sedimentation in flowing, and entering sludge reaction pond along pond bottom sloping, primary water overflows water channel from pond week.
Radical sedimentation basin is used for except the mud of precipitation in settling tank 5 and the floating matter on water surface top layer.Described radical sedimentation basin stress condition is better; Center water inlet, spoil disposal, peripheral effluent, little to the agitation force of water body, be conducive to the removal of mud.
(8) described strainer is for removing suspended substance in water and baregin particle, to reduce the turbidity of water.
Particularly, pressure filter selected by described strainer, utilizes the refining filtrate of filling in strainer, and when flowing through filtering layer from top to bottom when intaking, the suspended substance in water and baregin particle are removed, thus the turbidity of water is reduced.
As preferably, described strainer comprises the sand-bed filter 8 and carbon filter 9 that successively arrange, and waste water is by quartz sand, and the filtrations such as gac, make water quality reaching standard discharge.
Further, in described strainer, be provided with backwash water pump and autocontrol valve, realize the automatic control of described strainer.
As another preferred implementation of the present invention, described device also comprises pH and adjusts back pond 6, described pH adjusts back pond 6 and is arranged between described settling tank 5 and described strainer, and described pH regulator pond 2 is of a size of 4000 × 4000 × 4000 (mm), and useful volume is 56m
3, HRT is 0.50hr.As preferably, medicine-adding bin, dosing pump, reaction machine mixer and pH meter is provided with in described pH regulator pond 2, wherein said medicine-adding bin, dosing pump are used for adding acid reagent to described pH regulator pond 2, such as sulfuric acid, described reaction machine mixer is used for stirring to make pH in described pH regulator pond 2 have homogeneity, is monitored pH in described pH regulator pond 2 by pH meter.
As further preferably, described pH adjusts back between pond 6 and described filter element and is also provided with Buffer Pool 7, described Buffer Pool 7 for storing radical sedimentation basin water outlet so that can steady running with subsequent filter.Described Buffer Pool 7 is of a size of 6000 × 4000 × 4000 (mm), and significant depth is 3 meters, and effective volume is 75m
3, HRT is 0.7h, is also provided with and filters lift pump and ball float in described Buffer Pool 7.
(9) described reverse osmosis treatment system, for removing the various ions in water of condensation, to reach the corrodibility that emission request reduces described water of condensation simultaneously.
Described device also comprises RO treatment system 11, and described RO treatment system 11 is arranged at after described strainer, utilizes the osmotic pressure of film in RO treatment system 11, and when intaking by RO film, the chlorion in water, sulfate ion, ammonia nitrogen ion must in removals.
Described RO treatment system 11 comprises reverse osmosis group film (RO group film), electrical conductivity meter, Scale inhibitors medicine-adding bin, Scale inhibitors dosing pump and high-pressure pump.
(10) described interchanger treatment system, for heating described water of condensation, improving described condensation water problem, improving follow-up reverse osmosis effect.
Described device also comprises interchanger treatment system, and described interchanger treatment system is arranged between described strainer and described RO treatment system 11, and described interchanger treatment system is used for improving water temperature to 25 in winter and spends, and increases the producing water ratio of RO treatment system 11.
Described interchanger treatment system comprises interchanger, steam control valve group etc.
Further, also be provided with RO between described RO treatment system 11 and described interchanger treatment system and clean water tank, described RO cleans water tank for storing RO rinse water, described RO cleans in water tank and is provided with flushing water pump, ball float and accurate filter 10, clean in water tank at described RO and add Scale inhibitors, to prevent from forming dirt on described RO group film.
Described device also comprises reuse pool and the dense water tank of RO, described reuse pool and the dense water tank of RO are all communicated with described RO treatment system 11, wherein, water outlet and dense water is obtained respectively through reverse osmosis in described RO treatment system 11, water outlet is delivered to described reuse pool, and dense water enters in the dense water tank of described RO.Described reverse osmosis treatment system is also communicated with filtered water tank 12.
Wherein, the dense water tank of described RO, for storing the dense water of RO, comprises concentrated water discharge pump and ball float, and described reuse pool, for storing reuse water, comprises reuse water pump and ball float.
(11) described sterilization pool, for carrying out disinfection to described water of condensation and decolouring, to carry out reuse or discharge.Water of condensation then enters ozone contact tank and carries out disinfection and oxidative decoloration.
Further, described device also comprises comprehensive treating process room, wherein, described comprehensive treating process room be used for RO treatment plant, automatically controlled workshop, pump house, add pharmacy, sludge treatment etc., comprise ball float and catch pit emptying pump.
Device of the present invention also comprises sludge treating block further in addition, and described sludge treating block is connected with described settling tank 5, and described sludge treating block comprises sludge thickener and plate-and-frame filter press.
Wherein, described sludge thickener, for removing the interstitial water (accounting for 70% of total moisture) of mud granule, reduces sludge volume, thus reduces the burden of subsequent disposal structures and equipment, reduces processing costs.Mud gravity concentration method is selected as preferred described sludge thickener.Surge pump, hollow machine and plate-and-frame filter press is provided with in described sludge thickener.Described mud transports outward process after sludge condensation processing unit processes.
Mud is the product of sewage treatment process, is the important component part of whole sewage disposal.With the addition of chemical floc, stable in properties in the mud that this engineering produces, sedimentation effect is good, and the water ratio of mud is low, is easy to dehydration.Sludge components is polymerize aluminum chloride, polyacrylamide, vitriol, calcium salt, cigarette ash and alkali etc.
Sludge dewatering mode is divided into gravity type boat davit to dewater and mechanical equipment dehydration; What mechanical dewatering equipment was the most conventional is the modes such as plate-and-frame filter press, belt filter press and centrifuge.This programme is dewatered by plate-and-frame filter press with regard to adopting mud, and the processing intent of mud is that reducing moisture percentage in sewage sludge is 70% through plate-and-frame filter press moisture percentage in sewage sludge, greatly reduces the volume of mud, reaches the dry mud cake of stable in properties, is beneficial to transport.The design produce mud be manually pushed on the road of pump house southern side with plain trolley, then entrucking and by mud by relevant regulations environmental protection dispose.
Present invention also offers a kind for the treatment of process of flue gas condensing water, described method flow as shown in Figure 1, said method comprising the steps of:
Step (1) carries out the adjustment of the water yield and water quality to described water of condensation, to improve the surge capability to organic loading, prevent the sharply change for the treatment of system load, ensures the normal operation of Waste Water Treatment;
Step (2) pH to described water of condensation regulates, and is controlled by pH 7.5 ~ 8.5, and to make coagulant aids, flocculation agent react under weak basic condition, to make in subsequent treatment process stable carries out;
Step (3) is carried out air blast to described water of condensation and is passed into air, and in advance described water of condensation oxygenation is realized simultaneously to the profit layering in sewage, the lift-off oil of promoting the circulation of qi of going forward side by side, removes the oil-containing impurity in described water of condensation;
Step (4) carries out biology aerobic process to described water of condensation, to decompose the organism removed in described water of condensation;
Step (5) adds coagulating agent and flocculation agent carries out coagulation and flocculation treatment to described water of condensation, the particle being difficult to Direct precipitation is wadded a quilt with cotton into large precipitable particle, to reduce the turbidity of described water of condensation by the effect of being caught by the compression double electric layer of described coagulating agent and described flocculation agent, adsorption bridging, absorption charge neutrality throw out net;
Step (6) described water of condensation enters in described settling tank, and along radial direction to pond Zhou Liudong, suspended substance is sedimentation in flowing, and enter sludge reaction pond along pond bottom sloping, primary water overflows water channel from pond week, to carry out solid-liquid separation, reduces described condensation water pollutant index;
Step (7) carries out filtration treatment to described water of condensation, to remove suspended substance in described removal water and baregin particle, reduces the turbidity of water;
Step (8) heats described water of condensation, improves described condensation water problem, improves follow-up reverse osmosis effect;
Step (9) selects the various ions in reverse osmosis treatment system removal water of condensation, to reach the corrodibility that emission request reduces described water of condensation simultaneously;
Step (10) carries out disinfection to described water of condensation and decolours, to reach discharge or reuse standard.
Particularly, usually mix in equalizing tank 1 in described step (1), its objective is and will ensure regulating effect.Conventional blending means comprises: water pump pump circulation, pneumatic blending, mechanical stirring, the diversion of perforation diversion trench, provide the surge capability to organic loading by this regulating step, prevents the sharply change for the treatment of system load; Control ph, to reduce the consumption neutralizing the chemical needed; When production plant stops production, still input waste water can be continued to treatment system; Prevent high density matter from entering treatment system.
In described step (2), add the pH of alkaline reagents to sewage regulate, PAC, PAM are reacted under weak basic condition, and to make in subsequent treatment process stable carries out, particularly, add the pH of sodium hydroxide reagent to sewage to regulate, pH controls 7.5 ~ 8.5.
Step (3) is carried out air blast to described water of condensation and is passed into air, in advance described water of condensation oxygenation is realized simultaneously to the profit layering in sewage, the lift-off oil of promoting the circulation of qi of going forward side by side, realizes the layering of profit in this step by blasting air, and for next step aerobic reaction improve blast oxygen, oxygen source is provided.
After de-oiling, water of condensation enters biochemical oxidation pond in step (4), in contact-oxidation pool, carry out continuous aerobic biochemical, in this step by organonitrogen and ammonia-state nitrogen ammonifying bacteria, nitrococcus and Nitromonas effect under nitrogen is finally converted into nitric nitrogen.
Coagulating treatment adds coagulating agent in described step (5), and the particle by the effect such as to catch of compression double electric layer, adsorption bridging, absorption charge neutrality throw out net these being difficult to Direct precipitation wads a quilt with cotton into large precipitable particle, thus reaches the object of clarification water quality.As preferably, described coagulating agent uses negative polyacrylamide (PAM), carries out under weak basic condition.
Add flocculation agent in described flocculation treatment, to make the suspended particulate after flocculation increase, cohesion conforms to, and preferably uses polymerize aluminum chloride (PAC) as flocculation agent.
Described step (6) comprises following sub-step:
(6-1) contaminant particle formed in described coagulation and flocculation treatment is precipitated, form mud, and described mud is separated with water of condensation;
(6-2) described mud is carried out concentration, the supernatant liquor obtained turns back in step (1) and proceeds process, and the mud obtained is recycled.Select gravity concentration step as preferred described concentration in this step, plate-and-frame filter press can be selected further to process.
Described step (7) comprises following two sub-steps:
(7-1) described water of condensation is filtered through sand-bed filter 8, remove the suspended substance in described water of condensation;
(7-2) described water of condensation is filtered through carbon filter 9, remove the baregin particle in described water of condensation.
Described flue gas condensing water can reach the standard of being discharged into completely after above-mentioned steps process, in order to remove the pollutent in described water of condensation better, also comprises the step of pH readjustment between described step (4) and step (5).Add acid reagent in this step, add sulphuric acid soln particularly to regulate the pH of described water of condensation.
Further, after described pH adjusts back step, before described step (7), also comprise the step that described water of condensation is cushioned, to make whole treatment process and the more stable operation of technique.
Further, for step (8), described water of condensation is heated after described step (7), improve described condensation water problem, improve follow-up reverse osmosis effect, as shown in Figure 1, to improve described reverse-osmosis treated effect, increase the producing water ratio of this step, particularly in the winter time, the temperature of described water of condensation can be increased to 15-30 DEG C, be preferably 25 DEG C, to improve producing water ratio further.
Described step (9) selects the various ions in reverse osmosis treatment system removal water of condensation, to reach the corrodibility that emission request reduces described water of condensation simultaneously.
Remove the various ions in water of condensation by reverse osmosis membrane in this step, such as, when intaking by RO film, remove chlorion, sulfate ion, the ammonia nitrogen ion in water, obtain clear liquid and dense water, described clear liquid reuse, and described dense water is reclaimed.
Step (10) carries out disinfection to described water of condensation and decolours, to reach discharge or reuse standard.
The sewage of flue gas condensing described in the present invention gets to equalizing tank through pump by scrubber effluent outlet, then be promoted to neutralization reaction pond by lift pump metering and carry out neutralization reaction, in inflow coagulation-flocculation pond, by dosing coagulating and precipitation, be promoted to sand-bed filter through Buffer Pool by pump again, carbon filter filters, intensifying treatment effect, guarantees that standard water discharge is discharged.
Device of the present invention and treatment process have the following advantages:
1) sewage treatment facility has larger adaptability, anti impulsion load, can meet the change of certain water quality, the water yield.
2) adopt advanced and mature sewage treatment process, after sewage disposal, every effluent quality index all reaches " recirculated cooling water Standard of reclaimed water ".
3) equipment takes into account versatility with advanced, and stable equipment operation of the present invention is reliable, efficiency is high, convenient management, maintenance maintenance workload are few, moderate.
4) sewage treatment facility running is stable, working cost is low, management maintenance is convenient, operation automation, and labour intensity reduces, and efficiency is high.
5) sewage plant is rationally distributed, sewage disposal is compact, attractive in appearance beautiful, coordinate with existing environment is unified.
6) little on the impact of surrounding environment, energy conservative control noise, smell, deal carefully with and disposal of solid waste, can not cause secondary pollution.
The present invention is illustrated by above-described embodiment, but should be understood that, above-described embodiment just for the object of illustrating and illustrate, and is not intended to the present invention to be limited in described scope of embodiments.In addition it will be appreciated by persons skilled in the art that the present invention is not limited to above-described embodiment, more kinds of variants and modifications can also be made according to instruction of the present invention, within these variants and modifications all drop on the present invention's scope required for protection.Protection scope of the present invention defined by the appended claims and equivalent scope thereof.
Claims (19)
1. a flue gas condensing water treatment device, comprise be communicated with successively equalizing tank, pH regulator pond, water-and-oil separator, biochemical Aerobic Pond, coagulation-flocculation pond, settling tank, strainer, interchanger treatment system, reverse osmosis treatment system and sterilization pool, wherein:
Described equalizing tank, for improving the surge capability to organic loading, prevents the sharply change for the treatment of system load, to ensure the normal operation of Waste Water Treatment;
Described pH regulator pond, for control ph, is adjusted to alkalescence by described water of condensation, to reduce the consumption neutralizing the chemical needed;
Described water-and-oil separator, for regulating pondage and air blast, to realize the profit layering in sewage in advance, then air supporting de-oiling simultaneously to described sewage oxygenation;
Described biochemical Aerobic Pond, for carrying out continuous aerobic biochemical to described sewage, to remove the organism in described sewage;
Described coagulation-flocculation pond, the particle being difficult to Direct precipitation is wadded a quilt with cotton into large precipitable particle by the effect of being caught by compression double electric layer, adsorption bridging, absorption charge neutrality throw out net, reaches the object of clarification water quality;
Described settling tank, precipitates for being formed by the pollutent of flocculation cohesion in described coagulation-flocculation pond and is separated;
Described strainer, for removing suspended substance in water and baregin particle, to reduce the turbidity of water, wherein, pressure filter selected by described strainer;
Described interchanger treatment system, for heating described water of condensation, improves the temperature of described water of condensation, improves follow-up reverse osmosis effect;
Described reverse osmosis treatment system, for removing the various ions in water of condensation, to reduce the corrodibility of described water of condensation while reaching emission request;
Described sterilization pool, for carrying out disinfection to described water of condensation and decolouring, to carry out reuse or discharge.
2. device according to claim 1, is characterized in that, radical sedimentation basin selected by described settling tank, is provided with surge pump and mud scraper in described settling tank.
3. device according to claim 1, is characterized in that, described water-and-oil separator comprises gas blower, water pump machine, oil and water filters and oil slick machine.
4. device according to claim 1, it is characterized in that, pH readjustment pond is also provided with between described settling tank and described strainer, described pH adjusts back in pond and is provided with medicine-adding bin, dosing pump, reaction machine mixer and pH meter, wherein said medicine-adding bin, dosing pump are used for adjusting back pond to described pH and add acid reagent, to regulate the pH of described water of condensation.
5. device according to claim 1, is characterized in that, described strainer comprises sand-bed filter and the carbon filter of series connection, is provided with backwash water pump and autocontrol valve in described strainer, realizes the automatic control of described strainer.
6. device according to claim 4, is characterized in that, described pH adjusts back between pond and described strainer and is also provided with Buffer Pool, for the water outlet of settlement on storage pond, is also provided with and filters lift pump and ball float in described Buffer Pool.
7. device according to claim 1, is characterized in that, described reverse osmosis treatment system comprises reverse osmosis group film, electrical conductivity meter, Scale inhibitors medicine-adding bin, Scale inhibitors dosing pump and high-pressure pump.
8. device according to claim 1, it is characterized in that, described interchanger treatment system is used for heating described water of condensation, improves water temperature to 25 spend in winter, increase the producing water ratio of reverse osmosis treatment system, described interchanger treatment system comprises interchanger, steam control valve group.
9. device according to claim 1, it is characterized in that, described reverse osmosis treatment system is communicated with filtered water tank and dense water tank respectively, wherein said filtered water tank is for storing rinse water, be provided with flushing water pump, ball float and accurate filter in described filtered water tank, described dense water tank is communicated with reuse pool and reverse osmosis treatment system is communicated with.
10. device according to claim 1, is characterized in that, described device also comprises sludge treating system, and described sludge treating system is connected with described settling tank, and described sludge treating system comprises sludge thickener and plate-and-frame filter press.
The treatment process of 11. 1 kinds of flue gas condensing water, comprising:
Step (1) carries out the adjustment of the water yield and water quality to described water of condensation, to improve the surge capability to organic loading, prevent the sharply change for the treatment of system load, ensures the normal operation of Waste Water Treatment;
Step (2) pH to described water of condensation regulates, and is controlled by pH 7.5 ~ 8.5, to make coagulant aids, flocculation agent react under weak basic condition, subsequent treatment process is stablized and carries out;
Step (3) is carried out air blast to described water of condensation and is passed into air, and in advance described water of condensation oxygenation is realized simultaneously to the profit layering in sewage, the lift-off oil of promoting the circulation of qi of going forward side by side, removes the oil-containing impurity in described water of condensation;
Step (4) carries out biology aerobic process to described water of condensation, to decompose the organism removed in described water of condensation;
Step (5) adds coagulating agent and flocculation agent carries out coagulation and flocculation treatment to described water of condensation, the particle being difficult to Direct precipitation is wadded a quilt with cotton into large precipitable particle, to reduce the turbidity of described water of condensation by the effect of being caught by the compression double electric layer of described coagulating agent and described flocculation agent, adsorption bridging, absorption charge neutrality throw out net;
Step (6) described water of condensation enters in described settling tank, and along radial direction to pond Zhou Liudong, suspended substance is sedimentation in flowing, and enter sludge reaction pond along pond bottom sloping, primary water overflows water channel from pond week, to carry out solid-liquid separation, reduces described condensation water pollutant index;
Step (7) carries out filtration treatment to described water of condensation, to remove suspended substance in described water of condensation and baregin particle, reduces the turbidity of water;
Step (8) heats described water of condensation, improves the temperature of described water of condensation, improves follow-up reverse osmosis effect;
Step (9) selects the various ions in reverse osmosis treatment system removal water of condensation, to reach the corrodibility that emission request reduces described water of condensation simultaneously;
Step (10) carries out disinfection to described water of condensation and decolours, to reach discharge or reuse standard.
12. methods according to claim 11, is characterized in that, add the pH of sodium hydroxide reagent to described water of condensation and regulate in described step (2).
13. methods according to claim 11, is characterized in that, described step adds negative polyacrylamide in (5), under weak basic condition, carry out coagulating treatment.
14. methods according to claim 11, is characterized in that, add polymerize aluminum chloride and carry out flocculation treatment as flocculation agent in described step (5).
15. methods according to claim 11, is characterized in that, described step (6) comprises following sub-step:
(6-1) contaminant particle formed in described coagulation and flocculation treatment is precipitated, form mud, and described mud is separated with water of condensation;
(6-2) described mud is carried out concentration, the supernatant liquor obtained turns back in step (1) and proceeds process, and the mud obtained is recycled.
16. methods according to claim 15, is characterized in that, select plate-and-frame filter press to carry out concentration to described mud in described step (6-2).
17. methods according to claim 11, is characterized in that, described step (7) comprises following two sub-steps:
(7-1) described water of condensation is filtered through sand-bed filter, remove the suspended substance in described water of condensation;
(7-2) described water of condensation is filtered through carbon filter, remove the baregin particle in described water of condensation.
18. methods according to claim 11, is characterized in that, also comprise the step of pH readjustment between described step (6) and step (7).
19. methods according to claim 11, is characterized in that, in described step (9), remove the various ions in water of condensation by reverse osmosis membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310483071.7A CN103880238B (en) | 2013-10-15 | 2013-10-15 | A kind of flue gas condensing water treatment device and treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310483071.7A CN103880238B (en) | 2013-10-15 | 2013-10-15 | A kind of flue gas condensing water treatment device and treatment process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103880238A CN103880238A (en) | 2014-06-25 |
| CN103880238B true CN103880238B (en) | 2015-09-16 |
Family
ID=50949411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310483071.7A Active CN103880238B (en) | 2013-10-15 | 2013-10-15 | A kind of flue gas condensing water treatment device and treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103880238B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336294A (en) * | 2018-11-28 | 2019-02-15 | 北京国电龙源环保工程有限公司 | Inexpensive flue gas condensing water treatment facilities |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107162302A (en) * | 2017-06-20 | 2017-09-15 | 临涣焦化股份有限公司 | It is a kind of that chimney can be condensed to the method that Sewage treatment is utilized |
| CN107970738B (en) * | 2018-01-20 | 2020-08-18 | 西安交通大学 | Urban haze comprehensive control method and device based on industrial waste gas condensation and dehumidification |
| CN109133432A (en) * | 2018-10-16 | 2019-01-04 | 广州顺途信息科技有限公司 | A kind of acidic industrial waste water treatment system |
| CN112093932A (en) * | 2020-09-08 | 2020-12-18 | 国核电力规划设计研究院有限公司 | Flue gas condensate water treatment device and treatment method |
| CN113184932B (en) * | 2021-04-26 | 2022-03-29 | 武汉天空蓝环保科技有限公司 | Utilize flue gas evaporative concentration device and desulfurization effluent disposal system |
| CN113082881A (en) * | 2021-04-26 | 2021-07-09 | 通威股份有限公司 | Waste gas recovery zero-emission system and method for feed production |
| CN115259541A (en) * | 2022-06-11 | 2022-11-01 | 宁夏中科生物新材料有限公司 | Secondary condensed water deodorizing process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101333049A (en) * | 2007-07-25 | 2008-12-31 | 北京中科国益环保工程有限公司 | Advanced treatment and reclamation method for oil-salts containing sewerage |
| CN101830597A (en) * | 2009-03-09 | 2010-09-15 | 江西金达莱环保研发中心有限公司 | Treatment method of printing and dying wastewater |
| CN102070280A (en) * | 2010-11-26 | 2011-05-25 | 浙江大学 | Advanced treatment and recycling device and method of papermaking wastewater |
| CN203593682U (en) * | 2013-10-15 | 2014-05-14 | 光大环保（中国）有限公司 | Stack gas condensate water treating device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8105488B2 (en) * | 2006-09-01 | 2012-01-31 | Anticline Disposal, Llc | Waste water treatment method |
-
2013
- 2013-10-15 CN CN201310483071.7A patent/CN103880238B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101333049A (en) * | 2007-07-25 | 2008-12-31 | 北京中科国益环保工程有限公司 | Advanced treatment and reclamation method for oil-salts containing sewerage |
| CN101830597A (en) * | 2009-03-09 | 2010-09-15 | 江西金达莱环保研发中心有限公司 | Treatment method of printing and dying wastewater |
| CN102070280A (en) * | 2010-11-26 | 2011-05-25 | 浙江大学 | Advanced treatment and recycling device and method of papermaking wastewater |
| CN203593682U (en) * | 2013-10-15 | 2014-05-14 | 光大环保（中国）有限公司 | Stack gas condensate water treating device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336294A (en) * | 2018-11-28 | 2019-02-15 | 北京国电龙源环保工程有限公司 | Inexpensive flue gas condensing water treatment facilities |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103880238A (en) | 2014-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103880238B (en) | A kind of flue gas condensing water treatment device and treatment process | |
| CN105585220B (en) | A kind of urban sewage treatment system and purification method | |
| CN102372400B (en) | Hazardous waste handling center waste water integrated treatment system and method | |
| CN203593682U (en) | Stack gas condensate water treating device | |
| CN106904795B (en) | Cow breeding wastewater treatment process | |
| WO2010115319A1 (en) | Sewage treatment process and system | |
| CN105016577A (en) | Advanced treatment system for process sewage and advanced treatment method for sewage | |
| CN105693014A (en) | Sewage treatment system and sewage treatment method | |
| CN202337722U (en) | Wastewater comprehensive treatment system of dangerous waste disposal center | |
| CN106242179A (en) | The compositions of a kind of quasi-east coal chemical industrial waste water process and method of wastewater treatment thereof | |
| CN105731724A (en) | Treating and recycling method for offshore-platform high-salt domestic wastewater | |
| CN208136047U (en) | A kind of coking wastewater processing system | |
| CN101704617A (en) | Equipment for reclaiming and processing petrified enterprise sewage and process technology thereof | |
| CN106277554A (en) | The process Processes and apparatus of the waste water produced in methacrylic acid and ester production process | |
| CN205676312U (en) | A kind of offshore platform high salt life sewage treatment and reuse equipment | |
| CN108285240A (en) | Meet the municipal solid waste incinerator leachate processing method of cooling tower recycle-water requirement | |
| CN208562075U (en) | Ozone oxidation-BAC filtering-composite catalytic oxidation advanced treatment on coking wastewater system | |
| CN104355451B (en) | The technique of percolate bio-chemical effluent recycling | |
| CN102583899A (en) | Sewage treatment technology and special system in bean product production process | |
| CN210656480U (en) | Adopt washing cigarette waste water retrieval and utilization processing apparatus of DTRO device | |
| CN102390905B (en) | Advanced treatment device and method of micropolluted organic sewage | |
| CN107540161A (en) | High pure and ultra-fine modified calcium carbonate produces the processing method and processing system of waste water | |
| CN105693007B (en) | It is a kind of can be with the chemical engineering sewage advanced treatment system of deodorization | |
| CN213446615U (en) | Ethylene-vinyl acetate copolymer adhesive wastewater treatment device | |
| KR101136420B1 (en) | Integrated method for treating food waste water, livestock waste water, and night soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |