CN103466906A - Coom pressurized gasification wastewater treatment system and treatment method, and application thereof - Google Patents
Coom pressurized gasification wastewater treatment system and treatment method, and application thereof Download PDFInfo
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Abstract
The invention provides a coom pressurized gasification wastewater treatment system which comprises a regulation unit, a primary adsorption precipitation unit, a secondary adsorption precipitation unit, a coagulative precipitation unit, an anoxic biochemical treatment unit and an aerobic biochemical treatment unit which are sequentially connected, wherein an adsorbent used by the primary adsorption precipitation unit comprises the precipitate in the secondary adsorption precipitation unit. The invention also provides a treatment method using the coom pressurized gasification wastewater treatment system and application of the treatment system or method in treating coom pressurized gasification wastewater.
Description
Technical field
The present invention relates to a kind of Waste Water Treatment, be specifically related to a kind of coal gasification waste water, especially the treatment system of crushed coal pressure gasifying waste water and treatment process and their application.
Background technology
Coal Gasification Technology generally includes two kinds of atmospheric gasification and pressurized gasifications, refer under normal pressure or pressurized conditions, keep certain temperature, by vaporized chemical (air, oxygen or steam) and coal reaction, generate coal gas, the main component of coal gas is the inflammable gass such as carbon monoxide, hydrogen, methane.Sulphur in coal, ash grade and are removed in gasification or afterwards, make the discharge of pollutent controlled, thereby gasification is a kind of important method for preparing clean fuel, have improved effciency of energy transfer simultaneously.Crushed coal pressure gasifying is one of mode of Coal Gasification Technology.
Crushed coal pressure gasifying waste water is mainly derived from gas washing, condensation and fractionation workshop section.Because the temperature in pressurized-gasification furnace is relatively low, cause the crushed coal pressure gasifying Wastewater Pollutant component of generation very complicated, mainly comprise suspended substance, volatile phenol, prussiate, oil, sulfide, ammonia nitrogen, lipid acid, aromatics, heterogeneous ring compound, sulfocompound etc.Such waste water has the characteristics such as organic pollutant category is many, concentration is high, toxicity is large, ammonia nitrogen concentration is high, colourity is dark, is a kind of trade effluent that typically contains the organic compound of difficult degradation.
At present, crushed coal pressure gasifying waste water mainly adopts the treatment process of pre-treatment, biochemical treatment and advanced treatment combination.Pre-treatment generally comprises adjusting, oil removal, air supporting, acidication etc., biochemical treatment mainly be take activated sludge process as main, or be aided with certain filler, and comprising anaerobism, anoxic, the processing unit such as aerobic, advanced treatment mainly comprises advanced oxidation, underload oxidation, filtration, charcoal absorption etc.This technical process is comparatively complicated, and the residence time is long, and investment and running cost are high, easily are hit, and easily cause water outlet maybe can not meet the reuse requirement by stably reaching standard.Thereby need to seek the simpler and treatment effect of a kind of technical process treatment system and the treatment process of crushed coal pressure gasifying waste water preferably.
Summary of the invention
Therefore, the treatment process that the object of the invention is to overcome current existing crushed coal pressure gasifying waste water is existing such as defects such as flow process are complicated, efficiency is low, cost is high, shock resistance is not enough, the crushed coal pressure gasifying Waste Water Treatment that a kind of technical process is simple, processing efficiency is high, with low cost, shock resistance is good is provided, for the treatment process of this treatment system, and this treatment system or this treatment process are in the application for the treatment of in crushed coal pressure gasifying waste water.
The invention provides a kind of crushed coal pressure gasifying Waste Water Treatment, this system comprises regulon, one-level adsorption precipitation unit, secondary absorption precipitation unit, coagulating sedimentation unit, anoxic biochemical treatment unit and the aerobic treatment unit that order connects successively; The sorbent material that described one-level adsorption precipitation unit is used comprises the throw out in described secondary absorption precipitation unit.
Preferably, the sorbent material that described secondary absorption precipitation unit is used is activated coke, and the throw out deposition region of described secondary absorption precipitation unit is communicated with described one-level adsorption precipitation unit, so that the throw out of described secondary absorption precipitation unit passes into described one-level adsorption precipitation unit.It will be appreciated by those skilled in the art that the equipment such as pump can be set as required are so that above-mentioned throw out more successfully enters one-level adsorption precipitation unit.In addition, the sorbent material that described one-level adsorption precipitation unit is used can also comprise the throw out in the throw out deposition region of described one-level adsorption precipitation unit.
The treatment in accordance with the present invention system, wherein, described one-level adsorption precipitation unit comprises one-level adsorption tank and one-level settling tank, described secondary absorption precipitation unit comprises secondary absorption pond and second-level settling pond, the throw out deposition region of described secondary absorption precipitation unit comprises the bottom space of second-level settling pond, the bottom space of this second-level settling pond is communicated with the one-level adsorption tank, so that the throw out of second-level settling pond passes into described one-level adsorption tank.
The present invention also provides the treatment process for above-mentioned crushed coal pressure gasifying Waste Water Treatment, and the method comprises the following steps:
1) regulate and process: waste water is passed into to regulon, regulate its water quality, the water yield, the waste water after adjusted processing.Regulating water quality is mainly that the waste water to different time or different sources is mixed, and makes to flow out water-quality ratio more even; Regulating pondage is mainly to make the water yield of waste water comparatively constant evenly.For example, the regulon of certain capacity can be set, make crushed coal pressure gasifying waste water at first at this, with water process in pond, stir, mix, regulating water quality, stabilizing water quantity, after regulating, waste water passes into the one-level adsorption tank.
2) one-level adsorption precipitation is processed: in one-level adsorption precipitation unit, using sorbent material to above-mentioned steps 1) waste water after the adjusting that obtains is processed carries out adsorption treatment, then the throw out that makes to comprise sorbent material is deposited on the throw out deposition region of described one-level adsorption precipitation unit, get supernatant liquid, obtain the waste water after one-level adsorption precipitation is processed.As a kind of embodiment, one-level adsorption precipitation unit comprises one-level adsorption tank and one-level settling tank, uses sorbent material to above-mentioned steps 1 in the one-level adsorption tank) waste water regulated after processing carries out adsorption treatment, and adsorption time can be preferably 3～6h, for example 5h.Then in the one-level settling tank, make the throw out that comprises sorbent material be deposited on its bottom section, depositing time is preferably 3～5h, gets supernatant liquid, obtains the waste water after one-level adsorption precipitation is processed.
3) secondary absorption precipitation process: in the secondary absorption precipitation unit, use activated coke as sorbent material to above-mentioned steps 2) waste water after the one-level adsorption precipitation that obtains is processed carries out adsorption treatment, then the throw out that makes to comprise activated coke is deposited on the throw out deposition region of described secondary absorption precipitation unit, get supernatant liquid, obtain the waste water after the secondary absorption precipitation process.As a kind of embodiment, the secondary absorption precipitation unit comprises secondary absorption pond and second-level settling pond, using activated coke to above-mentioned steps 2 in the secondary absorption pond) waste water after one-level adsorption precipitation is processed carries out adsorption treatment, adsorption time can be preferably 3～6h, then in second-level settling pond, make the throw out that comprises activated coke be deposited on its bottom section, depositing time is preferably 1～3h, gets supernatant liquid, obtains the waste water after the secondary absorption precipitation process.
4) coagulating sedimentation is processed: in the coagulating sedimentation unit, in the waste water after the secondary absorption precipitation process obtained to above-mentioned step 3), add flocculation agent, make suspended substance generation throwing out precipitation, obtain the waste water after coagulating sedimentation is processed.
5) waste water after the coagulating sedimentation that anoxic biochemical treatment: in anoxic biochemical treatment unit, to above-mentioned steps 4) obtains is processed carries out the anoxic biochemical treatment, obtains the waste water after the anoxic biochemical treatment.The anoxic biochemical treatment is mainly denitrogenation, and larger molecular organics can be decomposed into to small organic molecule, improves the biodegradability of waste water.
6) waste water after anoxic biochemical treatment aerobic treatment: in the aerobic treatment unit, to above-mentioned steps 5) obtained carries out aerobic treatment, obtains can discharge/reuse water.Aerobic treatment is mainly further degradation of organic substances, reduces the COD(chemical oxygen demand (COD)).
Wherein, the sorbent material used step 2) comprises the throw out in step 3).
Preferably, above-mentioned steps 3) throw out in passes into described one-level adsorption precipitation processing unit from the throw out deposition region of described secondary absorption precipitation unit, usings as step 2) in the sorbent material that used at least partly.
The method according to this invention, wherein, described step 2) sorbent material used in can also comprise the throw out of described one-level adsorption precipitation unit.
In the present invention, the throw out deposited in the secondary absorption precipitation unit can be back to one-level adsorption precipitation unit and carry out second stage employ, as the sorbent material used in one-level adsorption precipitation unit at least partly.In addition, the throw out deposited in one-level adsorption precipitation unit also can be used as the sorbent material that uses in one-level adsorption precipitation unit at least partly.In simple terms, can include the throw out deposited in secondary absorption precipitation unit and/or one-level adsorption precipitation unit in the sorbent material used in one-level adsorption precipitation unit.
Preferably, described step 2), in the sorbent material used in, the weight ratio between the throw out of the throw out of secondary absorption precipitation unit and one-level adsorption precipitation unit is 1:0～0.5, is preferably 1:0.1～0.3, for example 1:0.2.The contriver finds, when adopting this weight ratio, not only can utilize more fully the loading capacity of activated coke, also can alleviate sedimentary excess demand in the secondary absorption precipitation unit, and can obtain adsorption effect preferably.If the throw out of one-level adsorption precipitation unit is too much, may weaken adsorption effect, thereby correspondingly increase the adsorption time in one-level adsorption precipitation unit and/or secondary absorption precipitation unit, processing efficiency is reduced.
The method according to this invention, wherein, in step 2) in, waste water can be 20～200:1 with the weight ratio of the sorbent material used, and can be preferably 20～100:1(for example 30:1 or 70:1), 40:1 more preferably.
The method according to this invention, wherein, in step 3), waste water can be 30～200:1 with the weight ratio of the activated coke of using, and can be preferably 30～100:1, more preferably 40:1.
The method according to this invention, wherein, the flocculation agent added in described step 4) can be selected the organic floculant or the biological flocculant that easily are decomposed.Organic floculant can be natural organic floculant, such as protein, gelatin, Sodium Alginate etc., or can be more labile Xylo-Mucine etc.Biological flocculant is such as being microbial flocculant etc.
The method according to this invention, wherein, the anoxic biochemical treatment time in described step 5) can be 10～30h, for example 20h.The aerobic treatment time in described step 6) can be 30～60h, for example 40h or 50h.As preferably, the summation of described anoxic biochemical treatment time and described aerobic treatment time can be 40～80h.
The method according to this invention, wherein, the waste water in described step 6) after aerobic treatment partly or entirely can be back to described anoxic biochemical treatment unit, carry out denitrification.Denitrification can further carry out denitrogenation processing to waste water, reduces the total nitrogen in waste water.
The method according to this invention, wherein, return of waste water in described step 6) after aerobic treatment to the weight ratio between the water yield of the waste water after the coagulating sedimentation processing that passes into described anoxic biochemical treatment unit in the water yield of described anoxic biochemical treatment unit and step 5) can be 1～3:1, is preferably 1:1.
Above-mentioned treatment system of the present invention or above-mentioned treatment process are in the application for the treatment of in crushed coal pressure gasifying waste water.
Crushed coal pressure gasifying Waste Water Treatment provided by the present invention and method have but are not limited to following beneficial effect:
1. included regulon, one-level adsorption precipitation unit, secondary absorption precipitation unit, coagulating sedimentation unit, anoxic biochemical treatment unit and the aerobic treatment unit of system provided by the present invention all can adopt the conventional equipment of this area, thus the process of construction of native system for convenience of, simple and direct and consuming time short.
2. the present invention first uses activated coke to carry out adsorption treatment as Adsorbent For Removal of Heavy, the macromole in waste water, hardly degraded organic substance Adsorption can be improved to the biodegradability of water outlet, alleviates the burden of follow-up biochemical treatment, shortens its treatment time; Anoxic biochemical treatment and aerobic treatment are mainly used in degrade remaining organic pollutant and ammonia nitrogen, and control water outlet total nitrogen, thereby make water outlet reach the standard-required of discharge or reuse, thereby the technical process of system of the present invention is comparatively simple, the residence time is short, shock resistance good, can reach treatment effect preferably.
3. the present invention has used two-stage absorption, and the throw out that discharge secondary absorption precipitation unit or one-level adsorption precipitation unit all can re-use as the sorbent material used in one-level adsorption precipitation unit at least partly, this not only can reach better adsorption effect, but also can effectively reduce the activated coke consumption, significantly reduced processing cost.Experiment showed, that the present invention, by activated coke is refluxed and utilizes, can make its loading capacity be increased to and approach original twice with respect to traditional one-level absorption.
4. the mode that usually adopts absorption and biochemical treatment simultaneously to carry out in prior art, perhaps adopt first precipitation to make sorbing material separate and then carry out the method for biochemical treatment with waste water, and system of the present invention also is provided with the coagulating sedimentation unit after two-stage precipitation, and adopt suitable flocculation agent to carry out flocculation sediment to the suspended substance in waste water.The method can effectively reduce the suspension content that enters anoxic biochemical treatment unit, and does not cause the variation of saltiness, has avoided the disadvantageous effect to its subsequent disposal, makes treatment effect obtain beyond thought lifting.
5. the discharge water of aerobic treatment unit can be back to anoxic biochemical treatment unit, realizes the removal of denitrification and ammonia nitrogen, makes water outlet reach better standard-required.
The accompanying drawing explanation
Below, describe by reference to the accompanying drawings embodiment of the present invention in detail, wherein:
Fig. 1 shows the embodiment schema of crushed coal pressure gasifying Waste Water Treatment of the present invention;
Fig. 2 shows the disposable embodiment schema of crushed coal pressure gasifying Waste Water Treatment of the present invention.
Reference numeral:
The 1-regulon, 2-one-level adsorption precipitation unit, 3-secondary absorption precipitation unit,
4-coagulating sedimentation unit, 5-anoxic biochemical treatment unit, 6-aerobic treatment unit,
21-one-level adsorption tank, 22-one-level settling tank, 31-secondary absorption pond, 32-second-level settling pond.
Embodiment
Further illustrate the present invention below by specific embodiment, still, should be understood to, these embodiment are only used for the use specifically described more in detail, and should not be construed as for limiting in any form the present invention.
General description is carried out to the material and the test method that use in the present invention's test in this part.Although, for to realize that many materials and working method that the object of the invention is used are well known in the art, the present invention still does to describe in detail as far as possible at this.It will be apparent to those skilled in the art that in context, if not specified, material therefor of the present invention and working method are well known in the art.
The COD of the crushed coal pressure gasifying waste water adopted in each embodiment if no special instructions,
crfor 3500mg/L, ammonia-nitrogen content is 250mg/L.
The present embodiment is for illustrating crushed coal pressure gasifying Waste Water Treatment of the present invention and treatment process thereof.
Fig. 1 shows a kind of embodiment of crushed coal pressure gasifying Waste Water Treatment of the present invention.This system comprises that the regulon 1, the one-level adsorption precipitation unit 2(that connect successively by pipeline comprise one-level adsorption tank 21 and one-level settling tank 22), secondary absorption precipitation unit 3(comprises secondary absorption pond 31 and second-level settling pond 32), coagulating sedimentation unit 4, anoxic biochemical treatment unit 5 and aerobic treatment unit 6.The bottom section of second-level settling pond can be communicated with the one-level adsorption tank.
The method of processing crushed coal pressure gasifying waste water can comprise the following steps:
1) regulate and process: crushed coal pressure gasifying waste water is passed into to regulon, in regulon, can make the water quality of waste water even, and regulate its water yield, and after regulating, waste water passes into the one-level adsorption tank.
2) one-level adsorption treatment: after using sorbent material to described adjusting, waste water carries out adsorption treatment, and the weight ratio of waste water and sorbent material is 40:1, and adsorption time is 5h, and the one-level adsorption treatment waste water of gained passes into the one-level settling tank.The sorbent material used in this step derives from the throw out that contains activated coke that second-level settling pond is discharged.
3) one-level precipitation process: at the bottom of the throw out in described one-level adsorption treatment waste water is deposited on the pond of described one-level settling tank and discharge, depositing time is 4h, and the one-level precipitation process waste water of gained passes into the secondary absorption pond.
4) secondary absorption is processed: use activated coke to carry out adsorption treatment to described one-level precipitation process waste water, the secondary absorption of gained is processed waste water and is passed into second-level settling pond.Wherein, waste water is 40:1 with the weight ratio of the activated coke of using, and adsorption time is 5h.
5) two-stage precipitation is processed: at the bottom of described secondary absorption is processed activated coke in waste water and is deposited on the pond of described second-level settling pond and discharge, depositing time is 2h, and the two-stage precipitation of gained is processed waste water and passed into the coagulating sedimentation unit.The activated coke that second-level settling pond is discharged is back to the one-level adsorption tank and can again utilizes.
6) coagulating sedimentation is processed: process in waste water and add organic floculant to described two-stage precipitation, make suspended substance generation throwing out precipitation, then the coagulating sedimentation waste water of gained is passed into to anoxic biochemical treatment unit.
7) anoxic biochemical treatment: described coagulating sedimentation waste water passes into the aerobic treatment unit process 10h in anoxic biochemical treatment unit after.
8) aerobic treatment: the waste water of step 7) gained is processed 40h in the aerobic treatment unit, in the stop total time of anoxic and aerobic treatment unit, is 50h, then discharges.A part of discharging water is back to anoxic biochemical treatment unit, make this recirculation water and the waste water that passes into to anoxic biochemical treatment unit from the coagulating sedimentation unit between weight ratio be 1:1.
System, after operation for some time, is detected final discharge water.Discharge the COD of water
crfor the 50mg/L left and right, ammonia-nitrogen content is the 10mg/L left and right, has reached the reuse requirement.
embodiment 2
The present embodiment is for illustrating crushed coal pressure gasifying Waste Water Treatment of the present invention and treatment process thereof.
Crushed coal pressure gasifying Waste Water Treatment in the present embodiment is identical with embodiment 1, can be referring to Fig. 1.
Crushed coal pressure gasifying method of wastewater treatment in the present embodiment is basic identical with embodiment 1, and its difference is:
In step 3), waste water is 70:1 with the weight ratio of the sorbent material that uses.
In step 4), waste water is 100:1 with the weight ratio of the activated coke of using.
In step 6), the flocculation agent added is biological flocculant.
In step 7), the treatment time of waste water in anoxic biochemical treatment unit is 30h.
In step 8), the treatment time of waste water in the aerobic treatment unit is 50h, and the processing total time that makes anoxic and aerobic treatment unit is 80h; Simultaneously, the part of the discharge water in step 8) is back to anoxic biochemical treatment unit, make this recirculation water and the waste water that passes into to anoxic biochemical treatment unit from the coagulating sedimentation unit between weight ratio be 3:1.
System, after operation for some time, is detected final discharge water.Discharge the COD of water
crfor 80mg/L, ammonia-nitrogen content is 15mg/L, has reached the reuse requirement.
embodiment 3
The present embodiment is for illustrating crushed coal pressure gasifying Waste Water Treatment of the present invention and treatment process thereof.
Fig. 2 shows a kind of embodiment of crushed coal pressure gasifying Waste Water Treatment of the present invention.This system comprises that the regulon 1, the one-level adsorption precipitation unit 2(that connect successively by pipeline comprise one-level adsorption tank 21 and one-level settling tank 22), secondary absorption precipitation unit 3(comprises secondary absorption pond 31 and second-level settling pond 32), coagulating sedimentation unit 4, anoxic biochemical treatment unit 5 and aerobic treatment unit 6.At the bottom of the pond of second-level settling pond, with the one-level adsorption tank, can be communicated with.And, at the bottom of the pond of one-level settling tank, with the one-level adsorption tank, also can be communicated with.
The method of processing crushed coal pressure gasifying waste water can comprise the following steps:
1) regulate and process: crushed coal pressure gasifying waste water is passed into to regulon, in regulon, can make the water quality of waste water even, and regulate its water yield, and after regulating, waste water passes into the one-level adsorption tank.
2) one-level adsorption treatment: after using sorbent material to described adjusting, waste water carries out adsorption treatment, and the weight ratio of waste water and sorbent material is 30:1, and adsorption time is 5h, and the one-level adsorption treatment waste water of gained passes into the one-level settling tank.The sorbent material used in this step derives from the throw out that comprises activated coke that one-level settling tank and second-level settling pond are discharged.In this sorbent material, the weight ratio between the throw out of the throw out of second-level settling pond and one-level settling tank is 1:0.5.
3) one-level precipitation process: at the bottom of the throw out in described one-level adsorption treatment waste water is deposited on the pond of described one-level settling tank, depositing time is 4h, and the one-level precipitation process waste water of gained passes into the secondary absorption pond.The throw out that the one-level settling tank is discharged is back to the one-level adsorption tank and can again utilizes.
4) secondary absorption is processed: use activated coke to carry out adsorption treatment to described one-level precipitation process waste water, the secondary absorption of gained is processed waste water and is passed into second-level settling pond.Wherein, waste water is 40:1 with the weight ratio of the activated coke of using, and adsorption time is 5h.
5) two-stage precipitation is processed: at the bottom of described secondary absorption is processed activated coke in waste water and is deposited on the pond of described second-level settling pond and discharge, depositing time is 2h, and the two-stage precipitation of gained is processed waste water and passed into the coagulating sedimentation unit.The activated coke that second-level settling pond is discharged is back to the one-level adsorption tank and can again utilizes.
6) coagulating sedimentation is processed: process in waste water and add biological flocculant to described two-stage precipitation, make suspended substance generation throwing out precipitation, then the coagulating sedimentation waste water of gained is passed into to anoxic biochemical treatment unit.
7) anoxic biochemical treatment: described coagulating sedimentation waste water passes into the aerobic treatment unit process 10h in anoxic biochemical treatment unit after.
8) aerobic treatment: the waste water of step 7) gained is processed 30h in the aerobic treatment unit, in the stop total time of anoxic and aerobic treatment unit, is 40h, then discharges.A part of discharging water is back to anoxic biochemical treatment unit, make this recirculation water and the waste water that passes into to anoxic biochemical treatment unit from the coagulating sedimentation unit between weight ratio be 1:1.
System, after operation for some time, is detected final discharge water.Discharge the COD of water
crfor 50mg/L, ammonia-nitrogen content is 10mg/L, has reached the reuse requirement.
comparative Examples 4
The present embodiment is for illustrating crushed coal pressure gasifying Waste Water Treatment of the present invention and treatment process thereof.
Crushed coal pressure gasifying Waste Water Treatment in the present embodiment is identical with embodiment 3, can be referring to Fig. 2.
But the difference of the working method of the present embodiment and condition and embodiment 3 is:
In step 3), waste water is 70:1 with the weight ratio of the sorbent material that uses.
In step 4), waste water is 80:1 with the weight ratio of the activated coke of using.
System, after operation for some time, is detected final discharge water.Discharge the COD of water
crfor 80mg/L, ammonia-nitrogen content is 15mg/L.As can be seen here, although equal few than in embodiment 3 of the activated coke of using in the sorbent material used in step 3) and step 4), treatment effect is good, has reached the reuse requirement, and the activated coke usage quantity has saved 50% than embodiment 3.
Although the present invention has carried out description to a certain degree, significantly, under the condition that does not break away from the spirit and scope of the present invention, can carry out the suitable variation of each condition.Be appreciated that and the invention is not restricted to described embodiment, and be attributed to the scope of claim, it comprises the replacement that is equal to of described each factor.
Claims (11)
1. a crushed coal pressure gasifying Waste Water Treatment, it is characterized in that, this system comprises regulon, one-level adsorption precipitation unit, secondary absorption precipitation unit, coagulating sedimentation unit, anoxic biochemical treatment unit and the aerobic treatment unit that order connects successively; The sorbent material that described one-level adsorption precipitation unit is used comprises the throw out in the secondary absorption precipitation unit;
Preferably, the sorbent material that described secondary absorption precipitation unit is used is activated coke, and the throw out deposition region of described secondary absorption precipitation unit is communicated with described one-level adsorption precipitation unit, so that the throw out of described secondary absorption precipitation unit passes into described one-level adsorption precipitation unit.
2. according to the system of claim 1, it is characterized in that, described one-level adsorption precipitation unit comprises one-level adsorption tank and one-level settling tank, described secondary absorption precipitation unit comprises secondary absorption pond and second-level settling pond, and the throw out deposition region of described secondary absorption precipitation unit comprises the bottom space of second-level settling pond; The bottom space of described second-level settling pond is communicated with the one-level adsorption tank, so that the throw out of second-level settling pond passes into described one-level adsorption tank.
3. the treatment process for the described crushed coal pressure gasifying Waste Water Treatment of claim 1 or 2, is characterized in that, the method comprises the following steps:
1) regulate and process: waste water is passed into to regulon, regulate its water quality, the water yield, the waste water after adjusted processing;
2) waste water after adjusting one-level adsorption precipitation processing: use sorbent material to above-mentioned steps 1) obtained is processed carries out adsorption treatment, then the throw out that makes to comprise this sorbent material is deposited on the throw out deposition region of described one-level adsorption precipitation unit, get supernatant liquid, obtain the waste water after one-level adsorption precipitation is processed;
3) secondary absorption precipitation process: use activated coke as sorbent material to above-mentioned steps 2) waste water after the one-level adsorption precipitation that obtains is processed carries out adsorption treatment, then the throw out that makes to comprise activated coke is deposited on the throw out deposition region of described secondary absorption precipitation unit, get supernatant liquid, obtain the waste water after the secondary absorption precipitation process;
4) coagulating sedimentation is processed: add flocculation agent in the waste water after the secondary absorption precipitation process obtained to above-mentioned step 3), make suspended substance generation throwing out precipitation, obtain the waste water after coagulating sedimentation is processed.
5) waste water after the coagulating sedimentation that anoxic biochemical treatment: to above-mentioned steps 4) obtains is processed carries out the anoxic biochemical treatment, obtains the waste water after the anoxic biochemical treatment;
6) waste water after anoxic biochemical treatment aerobic treatment: to above-mentioned steps 5) obtained carries out aerobic treatment, obtains can discharge/reuse water;
Wherein, the sorbent material used step 2) comprises the throw out in step 3);
Preferably, above-mentioned steps 3) throw out in passes into described one-level adsorption precipitation processing unit from the throw out deposition region of described secondary absorption precipitation unit, usings as step 2) in the sorbent material that used at least partly.
4. method according to claim 3, is characterized in that, described step 2) in the sorbent material that uses also comprise the throw out of described one-level adsorption precipitation unit; Preferably, described step 2), in the sorbent material used in, the weight ratio between the throw out of the throw out of secondary absorption precipitation unit and one-level adsorption precipitation unit is 1:0～0.5, is preferably 1:0.1～0.3.
5. according to the described method of claim 3 or 4, it is characterized in that, in step 2) in, waste water is 20～200:1 with the weight ratio of the sorbent material used, and is preferably 20～100:1, more preferably 40:1.
6. according to the described method of claim 3 or 4, it is characterized in that, in step 3), waste water is 30～200:1 with the weight ratio of the activated coke of using, and is preferably 30～100:1, more preferably 40:1.
7. according to the described method of claim 3 or 4, it is characterized in that, the flocculation agent added in described step 4) is selected from organic floculant or biological flocculant; Described organic floculant is one or more in protein, gelatin, Sodium Alginate and Xylo-Mucine; Described biological flocculant is microbial flocculant.
8. according to the described method of any one in claim 3 to 7, it is characterized in that, the anoxic biochemical treatment time in described step 5) is 10～30h; The aerobic treatment time in described step 6) is 30～60h; Preferably, the summation of described anoxic biochemical treatment time and described aerobic treatment time is 40～80h.
9. according to the described method of any one in claim 3 to 8, it is characterized in that, the waste water in described step 6) after aerobic treatment partly or entirely be back to described anoxic biochemical treatment unit, carry out denitrification.
10. method according to claim 9, it is characterized in that, return of waste water in described step 6) after aerobic treatment to the weight ratio between the water yield of the waste water after the coagulating sedimentation processing that passes into described anoxic biochemical treatment unit in the water yield of described anoxic biochemical treatment unit and step 5) is 1～3:1, is preferably 1:1.
11. in the described system of claim 1 or 2 or claim 3～10, the described method of any one is in the application for the treatment of in crushed coal pressure gasifying waste water.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110499A (en) * | 2015-09-28 | 2015-12-02 | 胡日中 | Terminal processing technique of industrial wastewater |
| CN107619155A (en) * | 2017-10-16 | 2018-01-23 | 大唐（北京）水务工程技术有限公司 | A kind of biochemical tailrace advanced processing system of crushed coal pressure gasifying |
| CN108101311A (en) * | 2017-12-29 | 2018-06-01 | 天津德清科技有限公司 | A kind of energy-saving sewage disposal system |
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| CN102070277A (en) * | 2010-11-15 | 2011-05-25 | 北京国能普华环保工程技术有限公司 | Coal gasification wastewater treatment process |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102070277A (en) * | 2010-11-15 | 2011-05-25 | 北京国能普华环保工程技术有限公司 | Coal gasification wastewater treatment process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110499A (en) * | 2015-09-28 | 2015-12-02 | 胡日中 | Terminal processing technique of industrial wastewater |
| CN107619155A (en) * | 2017-10-16 | 2018-01-23 | 大唐（北京）水务工程技术有限公司 | A kind of biochemical tailrace advanced processing system of crushed coal pressure gasifying |
| CN108101311A (en) * | 2017-12-29 | 2018-06-01 | 天津德清科技有限公司 | A kind of energy-saving sewage disposal system |
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