CN102743923A - System and method for coagulation sedimentation processing for coal bed methane drainage water - Google Patents
System and method for coagulation sedimentation processing for coal bed methane drainage water Download PDFInfo
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- CN102743923A CN102743923A CN2012102714967A CN201210271496A CN102743923A CN 102743923 A CN102743923 A CN 102743923A CN 2012102714967 A CN2012102714967 A CN 2012102714967A CN 201210271496 A CN201210271496 A CN 201210271496A CN 102743923 A CN102743923 A CN 102743923A
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Abstract
The invention discloses a system and a method for coagulation sedimentation processing for coal bed methane drainage water and belongs to the technical field of ground projects of oil and gas fields. The system comprises a lifting pump, a first pipeline mixer, a first coil pipe reactor, a second pipeline mixer, a second coil pipe reactor, an inclined pipe sedimentation pool, a sand filter pool and a solvent adding device. The system and the method utilize an agent prescription composed of coagulant and flocculant and a gravity separation and filtering device, effectively remove pollutants in suspended matter in the coal bed methane drainage water and the like, simultaneously achieve integration and miniaturization of the processing system of the coal bed methane drainage water, are suitable for dispersibility of coal bed methane production operation and diversity of water quantity and quality of drainage water, improve standard reaching processing rate of the coal bed methane drainage water, reduce environment pollution risk in the coal bed exploitation process and provide favorable conditions for high efficiency production and creation of enterprises.
Description
Technical field
The present invention relates to the oil-gas field surface engineering technical field of petroleum industry, particularly a kind of coal bed gas row adopts water coagulation sedimentation treatment system and method.
Background technology
Coal bed gas is a coal-bed gas gas, is in the incoalation process, to produce and contain the hydrocarbon gas in coal seam and adjacent stratum, and its Main Ingredients and Appearance is methane (CH
4), belong to high-grade energy and industrial chemicals.Through comprehensive development and utilization to coal bed gas, not only the Safety of Coal Mine Production rate can be improved, but also energy shortage can be alleviated, effectively reduce methane and emission amount of carbon dioxide, environment is produced positive impact.Through years of researches and exploration practices, China's cbm exploration exploitation has at present obtained the achievement that attracts people's attention, and coal bed gas has got into the commercial development stage, and comprehensive benefit begins progressively to manifest.
Can produce a large amount of rows in the coal-bed gas exploitation process and adopt water, the individual well water yield per day is about 5 ~ 40m
3, maximum can reach 100m
3Because geologic structure and cbm development process characteristic, row adopts pollutants such as containing a large amount of coal dusts, organic matter in the water, and directly the discharging meeting brings adverse influence to environment.In addition, the coal-bed gas exploitation well location puts that dispersion, geographical conditions of living in are complicated, environmental sensibility is not quite similar, and individual well row adopts the water water yield, water quality and also exists than big difference, and a lot of treatment process are restricted, and treatment effeciency is lower.Therefore; It is the effective means that solves the pollution problem of coal-bed gas exploitation operating environment that the coal bed gas row that the development technology flow process is simple, workable, processing cost is low adopts water fast processing equipment; Also be the friendly type of coal bed gas manufacturing enterprise creation environment enterprise, realize the important assurance of energy extraction and environmental protection harmonious development.
The treatment technology that abroad begins coal bed gas row is adopted water the eighties from eighties of last century is studied; And carried out the scale application; Conventional at present processing mode is for focusing on, and the main process of employing is deposition, filtering technique, and ground installation comprises water settling tank, filter etc.Handle back water outlet channel and comprise modes such as ground release, deep-well injection.Need special-purpose transport vehicle to arrange the transportation of adopting water but focus on, produce in coal bed gas and do not form the exploitation of scale property as yet, under the situation that the well location distribution disperses relatively, cause processing cost higher, be unfavorable for sizable application.
Domestic cbm exploration development is started late, and the coal bed gas row who does not still have moulding at present adopts water technology, and the Processing Technology Research that relevant coal bed gas row adopts water is also less relatively.Because it is close with coal mine water water quality characteristic that coal bed gas row adopts water, the processing that relevant coal bed gas row adopts water, the treatment process of main reference mine water at present.Along with the expansion of cbm development scale, need to be grasped in the cbm development process situation such as product row characteristic that row adopts water, water quality characteristics, and combine the China environmental protection policy, develop the row who is fit to China's cbm development characteristic and adopt the water comprehensive processing technique.
Summary of the invention
Adopt the cost of water treatment height in order to solve existing coal bed gas row, be unfavorable for problem such as sizable application; The invention provides a kind of coal bed gas row and adopt water coagulation sedimentation treatment system, comprise elevator pump, first pipe-line mixer, first coil reactor, second pipe-line mixer, second coil reactor, inclined tube settling tank, sand filter and medicine dissolving and adding device; Said lifting delivery side of pump is connected with the inlet of first pipe-line mixer; The outlet of said first pipe-line mixer is connected with the inlet of first coil reactor; The outlet of said first coil reactor is connected with the inlet of second pipe-line mixer; The outlet of said second pipe-line mixer is connected with the inlet of second coil reactor; The outlet of said second coil reactor is connected with the inlet of inclined tube settling tank, and the outlet of said inclined tube settling tank is connected with the inlet of sand filter, and said medicine dissolving and adding device is connected with the inlet of first, second pipe-line mixer respectively.
Said medicine dissolving and adding device set inside has two dispensing spaces, and the bottom of each dispensing space is provided with leakage fluid dram; Said leakage fluid dram is connected with the inlet of first pipe-line mixer with second pipe-line mixer respectively.
Said two dispensing spaces are loaded with coagulant and flocculant respectively; Said coagulant gets into said first pipe-line mixer through said leakage fluid dram; Said flocculant gets into said second pipe-line mixer through said leakage fluid dram.
Said coagulant is for gathering the silicon aluminium chloride or the bodied ferric sulfate aqueous solution; The said mass percent of gathering silicon aluminium chloride in the silicon aluminum chloride aqueous solution of gathering is 0.02 ~ 0.05%; The mass percent of bodied ferric sulfate is 0.02 ~ 0.05% in the said bodied ferric sulfate aqueous solution.
Said flocculant is the PAMC or the amphiprotic polyacrylamide aqueous solution; The mass percent of PAMC is 0.005 ~ 0.015% in the said PAMC aqueous solution; The mass percent of amphiprotic polyacrylamide is 0.005 ~ 0.015% in the said amphiprotic polyacrylamide aqueous solution.
The present invention also provides a kind of coal bed gas row to adopt water coagulation sedimentation processing method; Said method comprises: elevator pump will discharge row in the pond and adopt water and be delivered to first pipe-line mixer; And add coagulant at the said first pipe-line mixer arrival end, get into first coil reactor; Row adopts water and gets into second pipe-line mixer and second coil reactor, and adds flocculant at the said second pipe-line mixer arrival end; Row after flocculation reaction is handled adopts water and gets into the inclined tube settling tank, utilizes the inclined tube material of filling in the said inclined tube settling tank to promote the sedimentation separation that row adopts flco in the water; Row adopts water and gets into sand filter, and the different-grain diameter filtrate in the said sand filter is held back the solid particulate matter that row adopts in the water, filters water outlet and collects the back discharging by pond bottom hole pipe.
The reagent combination of the present invention through forming by coagulant and flocculant; And Gravity Separation and filter plant; Effective elimination coal bed gas row adopt the pollutants such as suspension in the water; Can realize simultaneously that coal bed gas row adopts integrated, the miniaturization of water treatment system, adapt to the dispersed of coal bed gas production operation and arrange the diversity of adopting the water water quantity and quality, improve the handling rate up to standard that coal bed gas row adopts water; Reduced the environmental pollution risk of coal-bed gas exploitation process, for the business stability High-efficient Production has been created advantage.
Description of drawings
Fig. 1 is that the coal bed gas row that the embodiment of the invention provides adopts the structural representation of water coagulation sedimentation treatment system.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is further described.
The principle that the row that the embodiment of the invention provides adopts water coagulation sedimentation treatment technology is: at first; Utilize the mechanism of action such as absorption, neutralization of coagulant; Compression row adopts the surface electric double layer of particles such as coal dust in the water, iron oxide, makes it be in free state, increases the proportion and the volume of particle simultaneously; Then, utilize the volume of high polymer coagulant to sweep, absorption, bridging action, clay particle is gathered into large-size particle; At last, utilize gravitational separation device completion Separation of Solid and Liquid such as inclined tube sedimentation, separate water outlet after sand filter filters, pollutant loads such as suspension can be reduced to below the first discharge standard.
Referring to Fig. 1; The embodiment of the invention provides a kind of coal bed gas row to adopt water coagulation sedimentation treatment system, and this system comprises elevator pump 1, pipe-line mixer 2, coil reactor 3, pipe-line mixer 4, coil reactor 5, inclined tube settling tank 6, sand filter 7 and medicine dissolving and adding device 8.Wherein, The outlet of elevator pump 1 is connected with the inlet of pipe-line mixer 2, and the outlet of pipe-line mixer 2 is connected with the inlet of coil reactor 3, and the outlet of coil reactor 3 is connected with the inlet of pipe-line mixer 4; The outlet of pipe-line mixer 4 is connected with the inlet of coil reactor 5; The outlet of coil reactor 5 is connected with the inlet of inclined tube settling tank 6, and the outlet of inclined tube settling tank 6 is connected with the inlet of sand filter 7, and medicine dissolving and adding device 8 is connected with the inlet of pipe-line mixer 2,4 respectively.Wherein, medicine dissolving and adding device 8 set inside have two dispensing spaces, and the bottom of each dispensing space is provided with 1 leakage fluid dram, and a leakage fluid dram is connected with the inlet of pipe-line mixer 2, and another leakage fluid dram is connected with the inlet of pipe-line mixer 4; Two dispensing spaces are loaded with coagulant and flocculant respectively, and coagulant gets into pipe-line mixer 2 through leakage fluid dram, and flocculant gets into pipe-line mixer 4 through another leakage fluid dram; Coagulant can be 0.02 ~ 0.05% for gathering the silicon aluminium chloride or the bodied ferric sulfate aqueous solution, gather the mass percent of gathering silicon aluminium chloride in the silicon aluminum chloride aqueous solution, and the mass percent of bodied ferric sulfate is 0.02 ~ 0.05% in the bodied ferric sulfate aqueous solution; Flocculant can be the PAMC or the amphiprotic polyacrylamide aqueous solution; The mass percent of PAMC is 0.005 ~ 0.015% in the PAMC aqueous solution, and the mass percent of amphiprotic polyacrylamide is 0.005 ~ 0.015% in the amphiprotic polyacrylamide aqueous solution.
In concrete production practices, the row who uses present embodiment to provide adopts water coagulation sedimentation treatment system processing row and adopts water, and effluent quality can reach the I grade standard of integrated wastewater discharge standard; The water quality situation is: pH=6 ~ 8; COD≤100mg/L, SS≤70mg/L, colourity≤50.The whole process time of staying is 40 ~ 50 minutes, wherein 4 ~ 5 minutes coagulating stages, sedimentation filter 23 6 ~ 45 minutes.
The a whole set of treatment system floor space that the embodiment of the invention provides is merely 35m
2, investment only needs 70,000 yuan.Adopt water central treating station technology with row and compare, flow process shortens, and equipment investment significantly reduces.
The embodiment of the invention is also adopted aqueous suspension, COD content than characteristics such as height to coal bed gas row; The reagent combination that provides a kind of selection to form by coagulant, flocculant; Realize that coal bed gas row adopts steady, the coalescence of flocculating of taking off of water; Utilize Gravity Separation and filter plant to accomplish the method for its Separation of Solid and Liquid again, specifically comprise the steps:
Step 101: use elevator pump 1 will concentrate the row who discharges in the pond to adopt water and be delivered to pipe-line mixer 2; Arrival end at pipe-line mixer 2 adds coagulant simultaneously; Utilize the flap and the blade construction of pipe-line mixer 2 inside; Produce effects such as cutting, reverse rotation when fluid is flowed and constantly mix, improve the coagulant reaction efficiency.In practical application, can adopt pollutant loads such as suspension in the water, COD according to row, confirm the dosage of coagulant, for example coagulant charging quantity can be (mass percent): gather silicon aluminium chloride 0.02 ~ 0.05%, bodied ferric sulfate 0.02 ~ 0.05%.
Step 102: the water outlet of pipe-line mixer 2 gets into coil reactor 3, utilizes its spiral-shaped structure, increases the medicament reaction time.Water velocity is controlled at 0.9 ~ 1.2m/s, and the current time of staying was controlled at 1.0 ~ 1.5 minutes.
Step 103: the water outlet of coil reactor 3 gets into pipe-line mixer 4; Arrival end at pipe-line mixer 4 adds flocculant simultaneously; Make flco increase in the water, increase its settling property, utilize the flap and the blade construction of pipe-line mixer 4 inside; Produce effects such as cutting, reverse rotation when fluid is flowed and constantly mix, improve the flocculant reaction efficiency.In practical application, can adopt pollutant loads such as suspension in the water, COD according to row, confirm the dosage of flocculant, for example flocculant dosage can be (mass percent): PAMC/amphiprotic polyacrylamide 0.005 ~ 0.015%.
Step 104: the water outlet of pipe-line mixer 4 gets into coil reactor 5, utilizes its spiral-shaped structure, increases the medicament reaction time.Water velocity is controlled at 0.9 ~ 1.2m/s, and the current time of staying was controlled at 1.0 ~ 1.5 minutes.
Step 105: the coal bed gas row after flocculation reaction is handled adopts water, gets into inclined tube settling tank 6, utilizes the inclined tube filler of filling in the settling tank, promotes the sedimentation separation of flco in the water, separates water outlet and is expelled to sand filter 7 by the top delivery port.The time of staying that row adopts water in the inclined tube settling tank 6 was controlled at 30 ~ 40 minutes.
Step 106: utilize the filtrate of different-grain diameter in the sand filter to accomplish holding back of residual solid particle in the water, filter water outlet and collect the back discharging by sand filter bottom hole pipe.
In July, 2010 ~ 2010 year September, adopting the technical scheme of the embodiment of the invention to accomplish 1 cover disposal ability is 5m
3The coal bed gas row of/h adopts the Design and Machining of water fast processing system, has accomplished The field research in Linfen branch company of coal bed gas company of CNPC.The handling process of whole system is short, and compact conformation is easy and simple to handle, can realize automation control, and field trial is accomplished 600m altogether
3Coal bed gas row adopt water treatment, system is stable between continuous operating period.System's feed liquor concentrates the row in the discharging pond to adopt water for on-the-spot, and the water quality situation is: COD250 ~ 300mg/L, SS130 ~ 200mg/L, colourity 60 ~ 150; System's effluent quality satisfies national sewage and comprehensively effluxes primary standard, and the water quality situation is: COD≤100mg/L, SS≤70mg/L, colourity≤50.
The advantage of the technical scheme that the embodiment of the invention provides is: coagulation, sedimentation, filtering technique Combined application, can realize the efficient processing that coal bed gas row adopts water, install simple to operate, the reliability height; Effluent quality after treatment is better, can realize the qualified discharge of sewage or reuse on the spot; Compare with traditional handicraft, equipment investment reduction by 30%, operating cost reduce by 20%.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a coal bed gas row adopts water coagulation sedimentation treatment system; It is characterized in that, comprise elevator pump (1), pipe-line mixer (2), coil reactor (3), pipe-line mixer (4), coil reactor (5), inclined tube settling tank (6), sand filter (7) and medicine dissolving and adding device (8); The outlet of said elevator pump (1) is connected with the inlet of pipe-line mixer (2); The outlet of said pipe-line mixer (2) is connected with the inlet of coil reactor (3); The outlet of said coil reactor (3) is connected with the inlet of pipe-line mixer (4); The outlet of said pipe-line mixer (4) is connected with the inlet of coil reactor (5); The outlet of said coil reactor (5) is connected with the inlet of inclined tube settling tank (6), and the outlet of said inclined tube settling tank (6) is connected with the inlet of sand filter (7), and said medicine dissolving and adding device (8) is connected with the inlet of pipe-line mixer (2), (4) respectively.
2. coal bed gas row according to claim 1 adopts water coagulation sedimentation treatment system, it is characterized in that said medicine dissolving and adding device (8) set inside has two dispensing spaces, and the bottom of each dispensing space is provided with leakage fluid dram; Said leakage fluid dram is connected with the inlet of pipe-line mixer (2) with pipe-line mixer (4) respectively.
3. coal bed gas row according to claim 2 adopts water coagulation sedimentation treatment system, it is characterized in that said two dispensing spaces are loaded with coagulant and flocculant respectively; Said coagulant gets into said pipe-line mixer (2) through said leakage fluid dram; Said flocculant gets into said pipe-line mixer (4) through said leakage fluid dram.
4. coal bed gas row according to claim 3 adopts water coagulation sedimentation treatment system, it is characterized in that said coagulant is for gathering the silicon aluminium chloride or the bodied ferric sulfate aqueous solution; The said mass percent of gathering silicon aluminium chloride in the silicon aluminum chloride aqueous solution of gathering is 0.02 ~ 0.05%; The mass percent of bodied ferric sulfate is 0.02 ~ 0.05% in the said bodied ferric sulfate aqueous solution.
5. coal bed gas row according to claim 3 adopts water coagulation sedimentation treatment system, it is characterized in that said flocculant is the PAMC or the amphiprotic polyacrylamide aqueous solution; The mass percent of PAMC is 0.005 ~ 0.015% in the said PAMC aqueous solution; The mass percent of amphiprotic polyacrylamide is 0.005 ~ 0.015% in the said amphiprotic polyacrylamide aqueous solution.
6. a coal bed gas row adopts water coagulation sedimentation processing method; It is characterized in that; Said method comprises: elevator pump (1) will discharge row in the pond and adopt water and be delivered to pipe-line mixer (2), and add coagulant at said pipe-line mixer (2) arrival end, get into coil reactor (3); Row adopts water and gets into pipe-line mixer (4) and coil reactor (5), and adds flocculant at said pipe-line mixer (4) arrival end; Row after flocculation reaction is handled adopts water and gets into inclined tube settling tank (6), utilizes the inclined tube material of filling in the said inclined tube settling tank (6) to promote the sedimentation separation that row adopts flco in the water; Row adopts water and gets into sand filter (7), and the different-grain diameter filtrate in the said sand filter (7) is held back the solid particulate matter that row adopts in the water, filters water outlet and collects the back discharging by pond bottom hole pipe.
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|---|---|---|---|
| CN201210271496.7A CN102743923B (en) | 2012-07-31 | 2012-07-31 | System and method for coagulation sedimentation processing for coal bed methane drainage water |
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| CN201210271496.7A CN102743923B (en) | 2012-07-31 | 2012-07-31 | System and method for coagulation sedimentation processing for coal bed methane drainage water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395926A (en) * | 2016-09-22 | 2017-02-15 | 北京合众有益科技有限责任公司 | Gas field produced wastewater reduction and harmless treatment methods |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06134469A (en) * | 1992-10-22 | 1994-05-17 | Sumitomo Sitix Corp | Method for treating silicon cutting waste liquid |
| CN101698545A (en) * | 2009-11-04 | 2010-04-28 | 兖矿集团有限公司 | Desulfurated circulating water purification treatment equipment and method |
| CN102060363A (en) * | 2010-12-31 | 2011-05-18 | 中国矿业大学 | Method for coagulating coal-bed gas produced water |
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2012
- 2012-07-31 CN CN201210271496.7A patent/CN102743923B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06134469A (en) * | 1992-10-22 | 1994-05-17 | Sumitomo Sitix Corp | Method for treating silicon cutting waste liquid |
| CN101698545A (en) * | 2009-11-04 | 2010-04-28 | 兖矿集团有限公司 | Desulfurated circulating water purification treatment equipment and method |
| CN102060363A (en) * | 2010-12-31 | 2011-05-18 | 中国矿业大学 | Method for coagulating coal-bed gas produced water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106395926A (en) * | 2016-09-22 | 2017-02-15 | 北京合众有益科技有限责任公司 | Gas field produced wastewater reduction and harmless treatment methods |
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