CN204111486U - A kind of equipment processing coal bed gas produced water - Google Patents
A kind of equipment processing coal bed gas produced water Download PDFInfo
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- CN204111486U CN204111486U CN201420574113.8U CN201420574113U CN204111486U CN 204111486 U CN204111486 U CN 204111486U CN 201420574113 U CN201420574113 U CN 201420574113U CN 204111486 U CN204111486 U CN 204111486U
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- bed gas
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Abstract
The utility model discloses a kind of equipment processing coal bed gas produced water, belong to technical field of sewage.This equipment comprises: for the homogeneous tank stirred by described coal bed gas produced water; Be communicated with described homogeneous tank for reducing COD
crcatalytic oxidizer; The ion remaval device for removing fluorion, sulfonium ion be communicated with described catalytic oxidizer; Be communicated with described ion remaval device for separating of the flocculation sediment tank precipitated; Electrochemical oxidation device and filler catalytic oxidizing equipment is provided with in described catalytic oxidizer; Electrochemical appliance is provided with in described ion remaval device; Described electrochemical appliance comprises two electrodes, and an electrode or two electrodes have catalyst layer, and described catalyzer is the IR-CF catalyzer of Shanghai Leze Environmental Engineering Co., Ltd.'s production and sales.This equipment can effectively remove the reducing substanceses such as coal bed gas produced Sulfide in water, organism, and fluorochemical and suspended substance, can reach the first discharge standard in Chinese Industrial Standards (CIS) GB8978-1996.
Description
Technical field
The utility model relates to a kind of equipment processing coal bed gas produced water, belongs to technical field of sewage.
Background technology
Coal-seam gas is commonly called as " gas ", and it generates in coalification course and composes the formula of the storage certainly natural-gas being stored in coal seam with adsorbed state.
Coal-seam gas, in gas recovery, has part aqueous vapor and is brought into earth's surface, be called recovered water.Draining water quality in coal seam is different because each department hydrogeological conditions is different with the water yield.Usually, coal bed gas produced glassware for drinking water has higher alkalescence, containing more sodium, barium, hydrocarbonate, iron, and has stronger electroconductibility, and is wherein rich in foreign gas and poisonous and harmful substances.Affect recovered water water qualitative factor a lot, different areas are the different depth of burial in areal even, and its water quality is also different.The area that China is suitable for large-scale development coal-seam gas is distributed in North China, northwest arid area more.If do not process coal bed gas produced water and just carry out the outer row of extensive style to it, not only pollute local water resources and land resources, especially water resources is wasted greatly, therefore the priority project of the coal bed gas produced Shui Shi China of rationally effective process.
The coal bed gas produced water of China is mainly divided into three major types: (1) partial area take suspended substance as the recovered water of principal pollutant; (2) in the trial production stage, Splitting Method is usually adopted to improve the recovery ratio of coal-seam gas, many containing fracturing liquid in coal bed gas produced water, and cause recovered water complicated component thus, COD
cr(adopt the chemical oxygen demand that potassium bichromate determines as oxygenant, measure according to " bioassay standard of GB11914-89 chemical oxygen demand (COD) "), i.e. dichromate index, reflects in water by the degree that reducing substances pollutes) high, increase intractability; (3) at mining phase, gas production, often with the recovered water that the indexs such as a large amount of salinity, high salt, hardness are high, each of which increases the water quality and quantity change fluctuation of the coal bed gas produced water of China, thus causes its intractability to increase.
Contrast can find out with " integrated wastewater discharge standard GB8978-1996 " first discharge standard, the material exceeded standard in coal bed gas produced water is COD
cr, fluorochemical, sulfide and suspended substance.
At present, COD is reduced
crmethod be oxidation style, be divided into oxidizing method and advanced oxidation processes.Because coal bed gas produced water variation water quality is large, add oxygenant in order to reduce COD
crmethod and infeasible, this is because the COD of recovered water water quality
crfluctuation is comparatively large, and the chemical feeding quantity of medicine machine is then fixing interpolation, and this can cause the inadequate or excessive of oxygenant addition to a great extent, although the chemical feeding quantity of medicine machine can according to the actual COD of waste water
crvalue regulates, but this needs detailed calculating and adjustment, cannot at the scene equipment run time regulate rapidly.Conventional advanced oxidation processes is High Temperature High Pressure wet oxidation, Fenton method, O
3/ UV/H
2o
2deng, these method running costs are higher, and device structure is complicated, are not suitable for the little water yield and the coal bed gas produced wastewater treatment of dispersion is compared in place.
Traditional fluorochemical, sulfide removal method many employings chemical precipitation method, be adjusted within the scope of certain pH value by waste water, then add chemical substance (as CaCl
2), make the F in waste water
-, S
2-with the positively charged ion in the chemical substance of adding (as Ca
2+) form the precipitation of fluorochemical and sulfide (as CaF
2, CaS), this technological principle is easily understood, but due to the chemical substance that this technique constantly drops in operational process, corresponding medicament expense is higher, and on-the-spot medicament runs, store, the system operation Comparision such as to make up a prescription is loaded down with trivial details, for little water yield multiple sources coal-seam gas treatment system management maintenance Comparision large.
Realizing in process of the present utility model, the design people finds at least there is following problem in prior art: existing method of wastewater treatment can not the reducing substances such as sulfide, organism in Simultaneous Stabilization ground Transformatin coal bed gas produced water (with COD
crcharacterize), fluorochemical and suspended substance.
Utility model content
Technical problem to be solved in the utility model is, the utility model provide a kind of can the reducing substances such as sulfide, organism in Simultaneous Stabilization ground Transformatin coal bed gas produced water (with COD
crcharacterize), the equipment of the coal bed gas produced water of process of fluorochemical and suspended substance.
Specifically, following technical scheme is comprised:
The utility model provides a kind of equipment processing coal bed gas produced water on the one hand, and described equipment comprises: for the homogeneous tank stirred by described coal bed gas produced water; Be communicated with described homogeneous tank for reducing COD
crcatalytic oxidizer; The ion remaval device for removing fluorion, sulfonium ion be communicated with described catalytic oxidizer; Be communicated with described ion remaval device for separating of the flocculation sediment tank precipitated;
Electrochemical oxidation device and filler catalytic oxidizing equipment is provided with in described catalytic oxidizer;
Electrochemical appliance is provided with in described ion remaval device; Described electrochemical appliance comprises two electrodes, and an electrode or two electrodes have catalyst layer, and described catalyzer is the IR-CF catalyzer of Shanghai Leze Environmental Engineering Co., Ltd.'s production and sales.
Particularly, have catalyst column in described filler catalytic oxidizing equipment, being placed with in described catalyst column can the catalyzer of oxidizing reaction of catalytic oxygen.
Particularly, described homogeneous tank is communicated with described catalytic oxidizer by pump.
Particularly, described flocculation sediment tank comprises flocculation reaction district and sedimentation and filtration district.
Particularly, described flocculation sediment tank is also connected with flocculation agent chemicals dosing plant and coagulant aids chemicals dosing plant.
Particularly, the clean water tank for the coal bed gas produced water after recycling also is provided with after described flocculation sediment tank.
Particularly, in described homogeneous tank, whipping appts is provided with.
Particularly, the whipping appts in described homogeneous tank is aerating apparatus.
Particularly, described pump is connected to the bottom of described homogeneous tank, and described pump is connected to the bottom of described catalytic oxidizer.
Particularly, on described homogeneous tank top, there is coal bed gas produced water water-in.
Particularly, on described catalytic oxidizer top, there is coal bed gas produced water water outlet, in described ion remaval device bottom, there is coal bed gas produced water water-in.
Particularly, on top, described flocculation sediment tank sedimentation and filtration district, there is supernatant liquor water outlet, bottom described flocculation sediment tank sedimentation and filtration district, there is precipitation discharge outlet.
Another aspect of the present utility model provides a kind of technique processing coal bed gas produced water, and described technique comprises the following steps:
Step (1), is delivered to the homogeneous tank with whipping appts by described coal bed gas produced water, stirred by coal bed gas produced water by the whipping appts of described homogeneous tank;
Step (2), is delivered to catalytic oxidizer by the coal bed gas produced water stirred in step (1), is oxidized in described catalytic oxidizer to described coal bed gas produced water, to reduce the COD of described coal bed gas produced water
cr;
Electrochemical oxidation device and filler catalytic oxidizing equipment is provided with in described catalytic oxidizer;
Step (3), is delivered to ion remaval device by the coal bed gas produced water coming from step (2), in described ion remaval device, the fluorion in described coal bed gas produced water is converted into precipitation, sulfonium ion is converted into sulfate radical;
Electrochemical appliance is provided with in described ion remaval device; Described electrochemical appliance comprises two electrodes, and an electrode or two electrodes have catalyst layer, and described catalyzer is the IR-CF catalyzer of Shanghai Leze Environmental Engineering Co., Ltd.'s production and sales.
Step (4), the flocculation sediment tank comprising flocculation reaction district and sedimentation and filtration district is delivered to together by coming from the precipitation generated in coal bed gas produced water and described coal bed gas produced water in step (3), make to be deposited in the further sedimentation in described flocculation reaction district, obtain supernatant liquor and precipitation; Supernatant liquor and precipitate and separate is made by filtration in described sedimentation and filtration district.
Particularly, in step (4), gained supernatant liquor is transported to clean water tank recycling or directly discharges.
Particularly, in step (4), in described flocculation sediment tank, add flocculation agent and coagulant aids promotion settle.
Particularly, in step (4), described flocculation agent is polymerize aluminum chloride, and described coagulant aids is polyacrylamide.
Particularly, in step (2), described Electrochemical oxidation device negative electrode used is graphite, and anode is Ti-Ru electrode.
Particularly, in step (1), the whipping appts of described homogeneous tank is aerating apparatus.
Particularly, in step (2), have catalyst column in described filler catalytic oxidizing equipment, being placed with in described catalyst column can the catalyzer of oxidizing reaction of catalytic oxygen.
Particularly, be transported to the catalytic oxidizer of step (2) by pump from the coal bed gas produced water coming from step (1).
Particularly, described pump is connected to the bottom of described homogeneous tank, and described pump is connected to the bottom of described catalytic oxidizer.
Particularly, in step (1), described coal bed gas produced water enters described homogeneous tank from described homogeneous tank top.
Particularly, in step (4), described supernatant liquor exports from the top, sedimentation and filtration district of described flocculation sediment tank; Described precipitation is discharged from the bottom in the sedimentation and filtration district of described flocculation sediment tank.
Particularly, in step (4), in described precipitation, transforming by fluorion the precipitation obtained except including, also having suspended substance.
The beneficial effects of the utility model are: by steps such as homogeneous, catalyzed oxidation, ion remaval and flocculation sediments, reducing substances, fluorochemical and the suspended substances such as the coal bed gas produced Organic substance in water of effective removal, sulfide, make the COD in treated coal bed gas produced water
crvalue, fluorochemical and sulfide content reach the regulation in " integrated wastewater discharge standard GB8978-1996 " first discharge standard, avoid environmental pollution, promote the recycling of recovered water.Meanwhile, at the bottom of equipment running cost of the present utility model, simple to operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the equipment of the coal bed gas produced water of process that the utility model embodiment 1 provides;
Fig. 2 is the schematic diagram of the equipment of the coal bed gas produced water of process that the utility model embodiment 2 provides.
Reference numeral represents respectively:
1, homogeneous tank; 2, pump; 3, catalytic oxidizer; 4, ion remaval device;
5, flocculation sediment tank; 6, flocculation agent chemicals dosing plant; 7, coagulant aids chemicals dosing plant;
8, clean water tank.
Embodiment
For making the technical solution of the utility model and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
The utility model provides a kind of equipment processing coal bed gas produced water on the one hand, comprising: for the homogeneous tank stirred by described coal bed gas produced water; Be communicated with described homogeneous tank for reducing COD
crcatalytic oxidizer; The ion remaval device for removing fluorion, sulfonium ion be communicated with described catalytic oxidizer; Be communicated with described ion remaval device for separating of the flocculation sediment tank precipitated; Electrochemical oxidation device and filler catalytic oxidizing equipment is provided with in described catalytic oxidizer; Electrochemical appliance is provided with in described ion remaval device; Described electrochemical appliance comprises two electrodes, and an electrode or two electrodes have catalyst layer, and described catalyzer is the IR-CF catalyzer of Shanghai Leze Environmental Engineering Co., Ltd.'s production and sales.
In aforesaid device, homogeneous, buffering are stirred in the effect of homogeneous tank.Because the water yield of coal bed gas produced water, variation water quality are larger, follow-up equipment is transported to reposefully, equably in order to enable coal bed gas produced water, therefore first through homogeneous tank, the whipping device in homogeneous tank to be utilized to be stirred by coal bed gas produced water, reaches the requirement of follow-up equipment work.Preferably, blast aerator selected by whipping appts, realizes stirring homogeneous by aeration mode.The volume of homogeneous tank can according to the water yield and the design of variation water quality situation, those skilled in the art can much change this, as long as the effect of stirring homogeneous, buffering can be realized, such as, when the flooding velocity of coal bed gas produced water is larger, the power of stirring can be strengthened, realize the Homogeneous phase mixing of the coal bed gas produced water in homogeneous tank; Otherwise it is also anti-; Again such as when the pollutant load of coal bed gas produced water changes greatly, also suitably can increase the power of stirring, to realize the Homogeneous phase mixing of the coal bed gas produced water in homogeneous tank; Otherwise it is also anti-.
In aforesaid device, the Main Function of catalytic oxidizer removes the reducing substances such as organism, reducing inorganic thing in coal bed gas produced water, reduces COD
cr.Electrochemical oxidation and filler catalytic oxidizing equipment is provided with in catalytic oxidizer.Effectively COD is reduced by the acting in conjunction of electrochemical oxidation and catalysed oxidation processes
cr.In the utility model, electrochemical oxidation is degradation of organic substances by generation oxidizing species.Electrochemical oxidation can take graphite as negative electrode, Ti-Ru electrode is anode, and passes into direct current.Because in recovered water, itself, containing a large amount of ion, has stronger electroconductibility, do not need additionally to add electrolytic solution.Owing to containing Cl in recovered water
-, Cl
-chlorine (2Cl is generated after anode loses electronics
-→ Cl
2+ 2e
-), the water-soluble rear generation hypochlorous acid (Cl of chlorine
2+ H
2o → HClO+HCl), the OH around hypochlorous acid and anode
-reaction generates hypochlorite (HClO+OH
-→ H
2o+ClO
-), along with hypochlorous accumulation, react further and generate oxygen (12ClO
-+ 6H
2o+12e
-→ 4HClO
3+ 8HCl+3O
2), hydroxide radical loses electronics also releasing oxygen (4OH simultaneously
-→ 2H
2o+O
2+ 4e
-); At negative electrode, oxygen obtains electronics Hydrogen Peroxide (O
2+ 2H
++ 2e
-→ H
2o
2); Hypochlorite and hydrogen peroxide are oxidizing species, and by the organic matter degradation in coal bed gas produced water, generally, in electrochemical oxidation process, the total reaction that organism occurs is:
TN+TC+3HClO→N
2+CO
2+H
2O+3H
++3Cl
-，
TN+3/2TC+3H
2O
2→N
2+3/2CO
2+3H
2O，
Wherein TN represents total nitrogen, and TC represents total carbon.
Organic matter degradation product is the free of contamination inorganicss such as water, carbonic acid gas, nitrogen.The gas such as carbonic acid gas, nitrogen can directly discharge.In addition, also being provided with catalyst column in catalytic oxidizer, in catalyst column, being filled with catalytic oxidant, carrying out utilizing the oxygen in air being oxidized and in the process of degradation of organic substances, this catalyzer can play the effect of catalysis, thus can improve oxygen etc. to organic rates of oxidative degradation.Electrochemical oxidation method and catalysed oxidation processes acting in conjunction, effective organics removal.
Meanwhile, the reducing inorganic thing in coal bed gas produced water also can in catalytic oxidizer oxidizing substance effect under be removed, effectively reduce COD
crvalue.Such as Fe
2+be converted into Fe
3+, S
2-be converted into SO
4 2-, Fe
3+, SO
4 2-content not restriction in emission standard.
This catalytic oxidizing equipment running cost is low, simple to operate, is applicable to the reducing substances in the coal bed gas produced water of process.
In aforesaid device, the Main Function of ion remaval device removes the F in coal bed gas produced water
-and S
2-.Electrochemical appliance is provided with in ion remaval device.Anode used is take iron as the clad metal electrode of main component, and negative electrode is graphite, and passes into direct current.Also composite catalyst is placed with in ion remaval device.Composite catalyst used can under electric field action, formation can with F
-reaction generates the material of precipitation.F removed by ion remaval device
-and S
2-be the coefficient result of multiple mechanism, designer thinks after analyzing, a specific works principle following (the utility model is not limited thereto principle, as long as have employed technical scheme provided by the utility model):
(1) under the effect of DC electric field, in ion remaval device, there is following electrochemical reaction:
R→R
++e
-，H
2O+2e
-→H
2+2OH
-，
Wherein R
+represent the positively charged ion that electrolysis in reaction system obtains, main component has metal, macromolecular compound etc. with positive charged group.
The R that electrolysis obtains
+with F in recovered water
-reaction, generates insoluble material and removes F
-, reaction equation is as follows: nR
+ (aq)+ (n-m) OH
- (aq)+ mF
- (aq)→ R
nf
m(OH)
(n-m) (s);
Similarly, S
2-also can with R
+reaction generates precipitation and is removed, and reaction equation is:
nR
+ (aq)+(n-2m)OH
- (aq)+mS
2- (aq)→R
nS
m(OH)
n-2m(s)；
(2) OH simultaneously, in solution
-can under electric field action, lose electronics and generate the very strong nascent state of oxidation capacity [O], nascent state [O] be by S
2-be oxidized to SO
4 2-;
(3) in addition, also there is the metal ion that metal anode electrolysis produces in the middle of solution, these metal ions and OH-react and generate metal hydroxides flco, by post precipitation separating unit, metal hydroxides flco can be removed, thus removal underwater gold belongs to ion, improves water quality; These oxyhydroxide itself have certain adsorption simultaneously, more contribute to the removal of fluorion and sulfide.
This ion remaval device can control to remove F by regulating logical DC voltage
-and S
2-efficiency, and do not relate to adding of medicament, cost-saving, simplify the operation.
In aforesaid device, the effect of flocculation sediment tank is the floss Precipitation from coal bed gas produced water making to generate in ion remaval device, and obtaining after filtering can the supernatant liquor of qualified discharge.Flocculation sediment tank can be divided into flocculation reaction district and sedimentation and filtration district.By with the tank connected flocculation agent chemicals dosing plant of flocculation sediment and coagulant aids chemicals dosing plant, add flocculation agent and coagulant aids to flocculation reaction district and make the abundant Precipitation of above-mentioned floss.Make the further sedimentation of precipitation in sedimentation and filtration district, obtain supernatant liquor after filtration, and throw out is discharged from flocculation sediment pot bottom.The flocculation agent added can be polymerize aluminum chloride, and the coagulant aids of interpolation can be polyacrylamide.Meanwhile, the suspended substance in coal bed gas produced water is also removed in flocculation sediment tank.
In aforesaid device, mounting means in catalytic oxidizer of the mounting means of whipping appts in homogeneous tank, Electrochemical oxidation device and filler catalytic oxidizing equipment and the mounting means of electrochemical appliance in ion remaval device do not have particular requirement, and those skilled in the art can determine according to practical situation.
Utilize aforesaid device, the utility model provides a kind of technique processing coal bed gas produced water on the other hand, comprises the following steps:
Step (1), is delivered to the homogeneous tank with whipping appts by described coal bed gas produced water, stirred by coal bed gas produced water by the whipping appts of described homogeneous tank;
Step (2), is delivered to catalytic oxidizer by the coal bed gas produced water stirred in step (1), is oxidized in described catalytic oxidizer to described coal bed gas produced water, to reduce the COD of described coal bed gas produced water
cr;
Electrochemical oxidation device and filler catalytic oxidizing equipment is provided with in described catalytic oxidizer;
Step (3), is delivered to ion remaval device by the coal bed gas produced water coming from step (2), in described ion remaval device, the fluorion in described coal bed gas produced water is converted into precipitation, sulfonium ion is converted into sulfate radical;
Electrochemical appliance is provided with in described ion remaval device; Described electrochemical appliance comprises two electrodes, and an electrode or two electrodes have catalyst layer, and described catalyzer is the IR-CF catalyzer of Shanghai Leze Environmental Engineering Co., Ltd.'s production and sales.
Step (4), the flocculation sediment tank comprising flocculation reaction district and sedimentation and filtration district is delivered to together by coming from the precipitation generated in coal bed gas produced water and described coal bed gas produced water in step (3), make to be deposited in the further sedimentation in described flocculation reaction district, obtain supernatant liquor and precipitation; Supernatant liquor and precipitate and separate is made by filtration in described sedimentation and filtration district.
In above-mentioned technique, the clear liquid of step (4) gained can be delivered to clean water tank and recycle, and also can directly discharge.
Embodiment 1
The present embodiment provides a kind of instrument and supplies processing coal bed gas produced water.
The present embodiment coal bed gas produced water to be dealt with is from 3# pond, Huayuancun, Yang Jiawan town, Baode County, Shanxi Province, and water quality situation is in table 1.
The coal bed gas produced water water quality of table 1 and emission standard contrast
As shown in Figure 1, the schematic diagram of equipment of Fig. 1 for being the coal bed gas produced water of process that this enforcement provides.This equipment comprises: for the homogeneous tank 1 stirred by coal bed gas produced water; Be communicated with homogeneous tank 1 for reducing COD
crcatalytic oxidizer 3; Homogeneous tank 1 is communicated with catalytic oxidizer 3 by pump 2; The ion remaval device 4 for removing fluorion, sulfonium ion be communicated with catalytic oxidizer 3; Be communicated with ion remaval device 4 for separating of the flocculation sediment tank 5 precipitated; Flocculation sediment tank 5 is also connected with flocculation agent chemicals dosing plant 6 and coagulant aids chemicals dosing plant 7.
Blast aerator (not shown) is had in homogeneous tank 1.In catalytic oxidizer 3, there are Electrochemical oxidation device (not shown) and filler catalytic oxidizing equipment (not shown); Wherein, the negative electrode of Electrochemical oxidation device is graphite, anode is Ti-Ru electrode, filler catalytic oxidizing equipment filler used is composite catalyst, model is DECOM-1, thered is provided by Shanghai Leze Environmental Engineering Co., Ltd., main component is metal and the polymer propping materials such as Nanoscale Iron, copper, titanium, and oxygenant is oxygen in air.Catalytic oxidizer operational conditions is in table 2.
The operational conditions of table 2 catalytic oxidizer 3
| Project | Unit | Operating parameter |
| Compartment flow velocity | cm·s -1 | 5～10 |
| Water inlet pH value | - | 6～9 |
| Running current | A | 1.5～3 |
| Running voltage | V | 28～30 |
| The residence time | min | 20～40 |
| Influent COD Cr | mg/L | ＜500 |
| Water inlet water temperature | ℃ | ＜50 |
In ion remaval device 4, have electrochemical appliance, wherein, the negative electrode of electrochemical appliance is graphite, and anode is take iron as the clad metal electrode of main ingredient; The model of composite catalyst is IR-CF, is provided by Shanghai Leze Environmental Engineering Co., Ltd..The operational conditions of ion remaval device 4 is in table 3.
The operational conditions of table 3 ion remaval device 4
| Operating parameter | Unit | Water inlet |
| Compartment flow velocity | cm·s -1 | 4～6 |
| Water inlet pH value | - | 7～9 |
| Running current | A | 1～2 |
| Running voltage | V | 28～30 |
| The residence time | min | 20～60 |
| Water inlet fluorochemical | mg/L | ＜30 |
| Water inlet sulfide | mg/L | ＜20 |
| Water inlet water temperature | ℃ | ＜20 |
The processing step utilizing aforesaid device to process coal bed gas produced water is as follows:
Step (1), is delivered to the homogeneous tank 1 with whipping appts by described coal bed gas produced water, stirred by coal bed gas produced water by the whipping appts of described homogeneous tank 1;
Step (2), is delivered to catalytic oxidizer 3 by the coal bed gas produced water stirred in step (1), is oxidized in described catalytic oxidizer 3 to described coal bed gas produced water, to reduce the COD of described coal bed gas produced water
cr;
Step (3), is delivered to ion remaval device 4 by the coal bed gas produced water coming from step (2), in described ion remaval device 4, the fluorion in described coal bed gas produced water is converted into precipitation, sulfonium ion is converted into sulfate radical;
Step (4), the flocculation sediment tank 5 comprising flocculation reaction district and sedimentation and filtration district is delivered to together by coming from the precipitation generated in coal bed gas produced water and described coal bed gas produced water in step (3), flocculant poly aluminum chloride is added to the flocculation reaction district in flocculation sediment tank 5 by flocculation agent chemicals dosing plant 6, coagulant aids polyacrylamide is added to the flocculation reaction district in flocculation sediment tank 5 by coagulant aids chemicals dosing plant 7, make to be deposited in the further sedimentation in described flocculation reaction district, obtain supernatant liquor and precipitation; Supernatant liquor and precipitate and separate is made by filtration in described sedimentation and filtration district.
Coal bed gas produced water indices after process is in table 4.
Table 4 processes rear coal bed gas produced water water quality and emission standard contrasts
As can be seen from Table 4, the COD exceeded standard in initial coal-seam gas recovered water
cr, fluorochemical, sulfide and suspended substance all reach first discharge standard in " integrated wastewater discharge standard GB8978-1996 " after treatment, the coal bed gas produced water therefore after process can directly discharge.Wherein, COD
crreduce 73%, content of fluoride reduces 78%, and sulfide content has decreased by more than 97%, and suspension content has decreased by more than 95%.In addition, the total iron content of the coal bed gas produced water after process also obviously reduces, and drop to below 0.2mg/L by initial 36.2mg/L, the range of decrease is close to 100%.Visible, instrument and supplies of the present utility model not only effectively can reduce in coal bed gas produced water the content of the material that exceeds standard, and effectively can also reduce metal content, and the coal bed gas produced water water quality after process is improved further.
Embodiment 2
The present embodiment provides a kind of equipment processing coal bed gas produced water.
As shown in Figure 2, the schematic diagram of equipment of Fig. 2 for being the coal bed gas produced water of process that this enforcement provides.The equipment of the present embodiment and the difference of embodiment 1 are, are provided with clean water tank 8 after flocculation sediment tank 5.Then coal bed gas produced water is according to after the art breading in embodiment 1, is delivered to clean water tank 8 recycles from flocculation sediment tank 5.
The above is only understand the technical solution of the utility model for the ease of those skilled in the art, not in order to limit the utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (12)
1. process an equipment for coal bed gas produced water, it is characterized in that, described equipment comprises: for the homogeneous tank stirred by described coal bed gas produced water; Be communicated with described homogeneous tank for reducing COD
crcatalytic oxidizer; The ion remaval device for removing fluorion, sulfonium ion be communicated with described catalytic oxidizer; Be communicated with described ion remaval device for separating of the flocculation sediment tank precipitated;
Electrochemical oxidation device and filler catalytic oxidizing equipment is provided with in described catalytic oxidizer;
Electrochemical appliance is provided with in described ion remaval device; Described electrochemical appliance comprises two electrodes, and an electrode or two electrodes have catalyst layer, and described catalyzer is the IR-CF catalyzer of Shanghai Leze Environmental Engineering Co., Ltd.'s production and sales.
2. equipment according to claim 1, is characterized in that, has catalyst column in described filler catalytic oxidizing equipment, and being placed with in described catalyst column can the catalyzer of oxidizing reaction of catalytic oxygen.
3. equipment according to claim 1, is characterized in that, described homogeneous tank is communicated with described catalytic oxidizer by pump.
4. equipment according to claim 1, is characterized in that, described flocculation sediment tank comprises flocculation reaction district and sedimentation and filtration district.
5. equipment according to claim 1, is characterized in that, described flocculation sediment tank is also connected with flocculation agent chemicals dosing plant and coagulant aids chemicals dosing plant.
6. equipment according to claim 1, is characterized in that, is also provided with the clean water tank for the coal bed gas produced water after recycling after described flocculation sediment tank.
7. equipment according to claim 1, is characterized in that, in described homogeneous tank, be provided with whipping appts.
8. equipment according to claim 7, is characterized in that, the whipping appts in described homogeneous tank is aerating apparatus.
9. equipment according to claim 3, is characterized in that, described pump is connected to the bottom of described homogeneous tank, and described pump is connected to the bottom of described catalytic oxidizer.
10. equipment according to claim 1, is characterized in that, has coal bed gas produced water water-in on described homogeneous tank top.
11. equipment according to claim 1, is characterized in that, have coal bed gas produced water water outlet on described catalytic oxidizer top, have coal bed gas produced water water-in in described ion remaval device bottom.
12. equipment according to claim 1, is characterized in that, have supernatant liquor water outlet on top, described flocculation sediment tank sedimentation and filtration district, bottom described flocculation sediment tank sedimentation and filtration district, have precipitation discharge outlet.
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|---|---|---|---|
| CN201420574113.8U CN204111486U (en) | 2014-09-30 | 2014-09-30 | A kind of equipment processing coal bed gas produced water |
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|---|---|---|---|
| CN201420574113.8U CN204111486U (en) | 2014-09-30 | 2014-09-30 | A kind of equipment processing coal bed gas produced water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402149A (en) * | 2014-09-30 | 2015-03-11 | 中国石油天然气集团公司 | Equipment and technology for processing extracted water from coalbed methane |
-
2014
- 2014-09-30 CN CN201420574113.8U patent/CN204111486U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104402149A (en) * | 2014-09-30 | 2015-03-11 | 中国石油天然气集团公司 | Equipment and technology for processing extracted water from coalbed methane |
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