CN104787972A - Coal-coking wastewater treatment system - Google Patents
Coal-coking wastewater treatment system Download PDFInfo
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- CN104787972A CN104787972A CN201510170671.7A CN201510170671A CN104787972A CN 104787972 A CN104787972 A CN 104787972A CN 201510170671 A CN201510170671 A CN 201510170671A CN 104787972 A CN104787972 A CN 104787972A
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Abstract
The invention relates to a coal-coking wastewater treatment system which comprises an ammonia blowing and stripping tank, an ammonia absorption tank, an air-floated oil removal tank, a wastewater adjustment tank, a coagulating sedimentation tank, an electrolytic tank, a packing type anoxic/anaerobic reaction tank and a backflow type biological aerated filter, wherein a denitrification additive adding and metering system is arranged in the ammonia blowing and stripping tank; the ammonia absorption tank is filled with a sulfuric acid solution with the mass concentration being 2-4%; the air-floated oil removal tank is divided into a mixing area and a separating area in sequence from bottom to top; the coagulating sedimentation tank comprises a stirring and mixing area and a sedimentation area; the electrolytic tank comprises a left chamber and a right chamber, that is, a positive pole chamber and a negative pole chamber respectively; the middle and lower parts of the positive pole chamber and the negative pole chamber are communicated with each other; the upper parts of the positive pole chamber and the negative pole chamber are partitioned by a partition; the positive pole chamber and the negative pole chamber are respectively provided with a positive electrode plate and a negative electrode plate; the positive electrode plate and the negative electrode plate are respectively connected with an external positive power supply and an external negative power supply; the packing type anoxic/anaerobic reaction tank comprises an aerobic section, an anoxic section and an anaerobic section which are partitioned by baffle plates; the backflow type biological aerated filter comprises a downstream area, an upstream area and a sewage area.
Description
Technical field
The present invention relates to environmental technology field, be specifically related to a kind of coking of coal Waste Water Treatment.
Background technology
The waste water produced in the processes such as the distilled ammonia wastewater that coking of coal waste water mainly produces from coal Pintsch process and raw gas cooling, the whole cold water of crude benzol produced in gas purification process, crude tar oil processing, benzin cause and washes.Coking of coal waste component is complicated, changeable, and its water quality changes with the composition of raw coal and coke making process.Waste water contains the heterogeneous ring compound that the ammonia nitrogen of higher concentration and many microorganisms are difficult to degrade, as naphthalene, quinoline etc., wherein mineral compound mainly a large amount of ammonia salt, thiocyanide, sulfide, prussiates etc., organic compound, except acids, also has the heterogeneous ring compound etc. of the aromatics of monocycle and many rings, nitrogenous, sulphur, oxygen.Having larger harm to environment, is a kind of unmanageable trade effluent.
Coking chemical waste water has following characteristics, and (1. change of water quality amplitude is large, and as ammonia nitrogen variation factor sometimes can up to 2.7,2. organic content is high, 3. C/N value is low, microbial nutrition is not enough, and 4. wastewater toxicity is large, and wherein cyanogen and aromatic ring, condensed ring, heterogeneous ring compound are all to the toxic effect of microorganism.
China's coking of coal waste water treatment starting is late, and technology is backwardness relatively.Due to the difference of ature of coal, external advanced Treatment process also can not get application, current coking chemical waste water Pollution abatement allows of no optimist, have the enterprise of 80% to there is ammonia nitrogen and COD discharge situation not up to standard in the coking of coal waste water treatment of the whole nation, coking of coal wastewater treating technology has become the bottleneck of China's clean coal switch technology.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the process problem of above-mentioned coking of coal waste water, the invention provides a kind of coking of coal Waste Water Treatment.
The technical solution adopted for the present invention to solve the technical problems is: a kind of coking of coal Waste Water Treatment, comprises ammonia stripping pond, ammonia cuvette, oil removal by air bubbling pond, wastewater equalization pond, coagulative precipitation tank, electrolyzer, material filling type anoxic anaerobic reation pool and reflux formula BAF.
Water inlet pipe is provided with bottom described ammonia stripping pond, water inlet pipe is connected with water pump, water inlet pipe exit is provided with water distribution pyrometric cone, be provided with denitrification additive before pump intake and add metering system, the middle part in ammonia stripping pond is provided with alkali lye and adds entrance, the top in ammonia stripping pond is provided with pH value measuring apparatus, ammonia stripping is provided with aerating system bottom pond, the water outlet in ammonia stripping pond is provided with gas-liquid separator, the upper cover design in ammonia stripping pond coning, conical top is provided with ammonia collection tube, the fan for discharging ammonia is provided with in ammonia collection tube, ammonia collection tube is communicated with ammonia cuvette, the water outlet top in ammonia stripping pond is provided with overfalling weir, overfalling weir connects the water inlet pipe of wastewater equalization pond.
The denitrification additive that described denitrification additive adds metering system interpolation is counted by the polyethylene polyamines salt of 20-60% butanone, 20-60% in mass ratio, the hydroxyethyl ether cellulose of 20-40% and the clorox of 20-50% mix, and the add-on of denitrification additive is 20-50ppm.
There is mass concentration to be the sulphuric acid soln of 2-4% in described ammonia cuvette, after absorbing ammonia, generate ammonium sulfate reuse.
Described oil removal by air bubbling pond comprises water inlet pipe and the rising pipe for discharging the rear water of process, and described oil removal by air bubbling pond is followed successively by mixing zone and disengaging zone from bottom to up; Described disengaging zone comprises catchment area and is positioned at the oil-collecting Ji Zhaqu of catchment area; The bottom of the mixing zone in described oil removal by air bubbling pond is provided with aeration plate, and the top of described aeration plate is provided with water distributor, and described water distributor connects water inlet pipe, and described aeration plate is connected with the blower fan outside oil removal by air bubbling pond by aeration tube; Triphase separator is provided with in described disengaging zone, described triphase separator comprise flow deflector and be positioned at below flow deflector with flow deflector with the use of triangle guide ring, described triangle guide ring is arranged on the inwall in oil removal by air bubbling pond, the top of described flow deflector is identical with the shape of disengaging zone, the bottom of described flow deflector is horn-like, and the internal diameter of the bottom of described flow deflector is greater than the internal diameter of triangle guide ring; The top of described disengaging zone outer wall is provided with overfalling weir, and described overfalling weir is connected with rising pipe; Described oil-collecting Ji Zhaqu is laid with dregs of fat scraper plate and crackling receiving tank; When waste water overflows from the bottom up, water, oil enter the bottom of flow deflector together with scum silica frost by triangle guide ring, oil and scum silica frost continue up to enter oil-collecting Ji Zhaqu, and water enters catchment area by the gap between flow deflector and triangle guide ring; In order to the better effects if of wastewater treatment, described water distributor is arranged to concentric circles or cross shape, water distributor has horizontal radiation water outlet; Further, described aeration plate is the pore type aeration plate being evenly provided with micropore.
Described wastewater equalization pond comprises water inlet pipe and rising pipe, for regulating water quality and the water yield of waste water.
Described coagulative precipitation tank comprises and is uniformly mixed district and settling region, and be uniformly mixed bottom district and be provided with wastewater inlet pipe, middle and upper part is provided with liquid add-on system, is provided with whipping appts being uniformly mixed in the middle part of district; Baffle plate is provided with in described settling region, the inwall of this baffle plate and settling tank forms the waste water runner entering settling region as waste water, the exit of settling region is provided with triphase separator, the outlet top of settling region is provided with overfalling weir, the tapered structure of settling region bottom design, is provided with sediment discharge valve bottom settling region.
Described electrolyzer is provided with water inlet pipe and rising pipe, and water inlet pipe is communicated with the rising pipe of coagulative precipitation tank; Described electrolyzer is left and right two cell structure, be respectively cathode chamber and anode chamber, described cathode chamber is communicated with the middle and lower part of anode chamber, and top is separated by dividing plate, cathode chamber and anode chamber are respectively equipped with positive and negative two battery lead plates, and positive and negative two battery lead plates connect outside positive-negative power respectively; The top of cathode chamber and anode chamber is conical structure, and the top of conical structure is all provided with effuser; Further, be positive electrode material with ruthenium-iridium-tantalum electrode or ruthenium-iridium-tantalum tin electrode or iridium tantalum Ti electrode or iridium tantalum titanium tin electrode, Ti electrode is negative material; Modification coke powder is filled with in described electrolyzer; The exit of described electrolyzer is provided with triphase separator, and outlet top is provided with overfalling weir, and overfalling weir connects rising pipe; The rising pipe of described electrolyzer is communicated with the water inlet pipe of material filling type anoxic anaerobic reation pool.
Further, the making processes of described modification coke powder: 1. coke powder heat alkali liquid soaks half an hour, after washed with de-ionized water, then soaks half an hour with dilute hydrochloric acid, and by washed with de-ionized water, the baking oven putting into 378K dries 6h; 2. Fe (the N0 of 0.5-1mol/L is then immersed in
3)
3in solution, vibrate 6h in the vibrator of 150r/min, by washed with de-ionized water; 3. the product after cleaning dries 6h under 358K condition; 4. under 773K, then calcine 4h obtain modification coke powder.
Described material filling type anoxic anaerobic reation pool comprises the double oxygen section, anoxic section and the anaerobism section that are separated into by traverse baffle, described double oxygen section head end is provided with the water inlet pipe for feeding waste water, oxygen section end of holding concurrently is communicated with anoxic section head end, anoxic section end is communicated with anaerobism section head end, the bottom of described anoxic section and anaerobism section water inlet side traverse baffle is provided with the corner of 45 degree, the shock action produced when entering to avoid current, thus the effect playing buffering current and water distribution uniformity; Anaerobism section end is provided with triphase separator and overfalling weir, and overfalling weir connects rising pipe; Described double oxygen section, anoxic section and the tapered structure of anaerobism section bottom design, pyramidal structure connects mud discharging valve; The upper cover design coning structure of the double oxygen section of described material filling type anoxic anaerobic reation pool, anoxic section and anaerobism section, conical structure top is provided with independently methane waste product effuser; All filler is provided with in described double oxygen section, anoxic section and anaerobism section; The rising pipe of described material filling type anoxic anaerobic reation pool is communicated with the water inlet pipe of reflux formula BAF.
Described reflux formula BAF middle and upper part is cylindrical, bottom is conical structure, comprises lower current area, ascending zone and mud district; Described lower current area is positioned at the middle part of the cylindrical structural of reflux formula BAF, for cylindrical structural, lower current area top is provided with water inlet pipe and water distributor, filler is provided with in the middle part of lower current area, lower current area bottom is provided with aeration tube, the bottom of described lower current area is provided with traverse baffle, and the longitudinal section of described traverse baffle is horn-like; Described ascending zone is positioned at the periphery of lower current area, the top of traverse baffle, and be provided with filler in the middle part of ascending zone, bottom is provided with aeration tube, and the exit on ascending zone top is provided with overfalling weir; Described mud district is positioned at the bottom of the bottom of reflux formula BAF, lower current area and ascending zone, and the bottom in mud district is provided with mud discharging valve.
The standard water discharge discharge of described reflux formula BAF.
Adopt above-mentioned coking of coal Waste Water Treatment to carry out a method for wastewater treatment, there are following steps:
1. the high-concentration ammonia nitrogenous wastewater that with the addition of denitrification additive enters ammonia stripping pond by water inlet pipe, water pump, its pH value is regulated to be 9-12, under 20-50 DEG C of condition, waste water stops 60-120min and carries out Air Exposure in ammonia stripping pond, gas-liquid separator realizes the separation of ammonia G&W, free ammonia in waste water drains into ammonia cuvette by ammonia collection tube, and ammonia is absorbed to generate ammonium sulfate reuse in ammonia cuvette, and waste water enters the water inlet pipe of wastewater equalization pond by water outlet.
2. oily(waste)water enters the middle and lower part in oil removal by air bubbling pond by water inlet pipe; The aeration plate be positioned at below the water inlet pipe of oil removal by air bubbling pond produces a large amount of tiny bubble, the tiny bubble that aeration plate produces and oil slick, dross adherence form mixture and rise under buoyancy, under the effect of disengaging zone, oil removal by air bubbling pond triphase separator, mixture rises to oil-collecting Ji Zhaqu, under the effect of dregs of fat scraper plate, oil slick and scum silica frost enter crackling receiving tank and cleaned outward transport; Water after separating treatment enters catchment area, oil removal by air bubbling pond under the three-phase separation area flow deflector effect of oil removal by air bubbling pond, is entered the water inlet pipe of wastewater equalization pond by overfalling weir, rising pipe and pipe connecting.
3. wastewater equalization pond regulating water quality and the water yield is entered from the waste water in ammonia stripping pond, the waste water in oil removal by air bubbling pond and other waste water by water inlet pipe.
4. the wastewater inlet pipe that the water after regulating is uniformly mixed bottom district by coagulative precipitation tank enters coagulative precipitation tank, mixes with the coagulating agent from liquid add-on system, utilizes the whipping appts be arranged in the middle part of stirring area to stir; Waste water after coagulating enters settling region, and the triphase separator of settling region realizes mud-water separation; Mud sinks to the bottom of coagulative precipitation tank settling region under gravity, is discharged by the sediment discharge valve of bottom; Waste water enters the water inlet pipe of electrolyzer by overfalling weir, rising pipe and pipe connecting.
5. the waste water from coagulative precipitation tank enters electrolyzer by water inlet pipe, waste water saltiness is high, good conductivity, the electrolytic efficiency of the three-diemsnional electrode being granule electrode with modification coke powder strengthening three-diemsnional electrode system, pollutent in waste water is by electrolysis, and the gas that in electrolytic process, positive and negative electrode produces is sold or reuse after collecting, being separated drying; Waste water after electrolysis treatment enters the water inlet pipe of material filling type anoxic anaerobic reation pool by rising pipe.
6. waste water enters the bottom of material filling type anoxic anaerobic reation pool by the hold concurrently water inlet pipe of oxygen section of material filling type anoxic anaerobic reation pool; Waste water advances up and down along traverse baffle after entering material filling type anoxic anaerobic reation pool, successively by the Sludge Bed of each reaction chamber of hold concurrently oxygen section, anoxic section and anaerobism section, mud in reaction tank moves along with the upper current downflow of waste water and the effect of biogas rising, the settlement action of the barrier effect of filler and traverse baffle and mud self makes again the flow velocity of mud reduce, therefore a large amount of mud is all trapped within reaction tank, and the microorganism in reaction tank fully contacts with the organism in waste water.Hydrolysis of organic matter in waste water is organic acid by the heterotrophic bacterium of the amphimicrobe of oxygen section, anoxic section and the anaerobism section held concurrently, and make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter.Waste water after anaerobic reaction realizes the separation of mud, water, methane gas at the triphase separator that anaerobism section end is provided with, and mud sinks to the bottom of material filling type anoxic anaerobic reation pool under gravity, and unnecessary mud is discharged by the mud discharging valve of bottom; The methane waste product that material filling type anoxic anaerobic reation pool produces collects discharge by reaction tank top effuser; Waste water after process enters the water inlet pipe of reflux formula BAF by overfalling weir, rising pipe and pipe connecting.
7. waste water enters the lower current area of reflux formula BAF by water inlet pipe, water distributor, the air that aeration tube produces and waste water cross generation biochemical reaction in filler, filler filters waste water simultaneously, waste water is by entering ascending zone after traverse baffle, biochemical reaction is there is in filler, filler filters waste water simultaneously, the mud that lower current area and ascending zone produce sinks to mud district, emitted by the mud discharging valve bottom mud district, the water after the process of reflux formula BAF is by overfalling weir and rising pipe qualified discharge.
8. the mud that coagulative precipitation tank, material filling type anoxic anaerobic reation pool, reflux formula BAF are discharged is transported outward after concentrating, dewatering.
The invention has the beneficial effects as follows: suit measures to local conditions, capital construction
investmentit is few,
safeguardconvenient, energy consumption is lower, has reasonable treatment effect to waste water, can realize sewage recycling, fully utilize sewage.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation in embodiment of the present invention ammonia stripping pond.
In Fig. 1: 1. ammonia stripping pond, 1-1. ammonia stripping pond water inlet pipe, 1-2. water distribution pyrometric cone, 1-3. denitrification additive adds metering system, 1-4. alkali lye adds entrance, 1-5.pH value measurement mechanism, 1-6. aerating system, 1-7. gas-liquid separator, 1-8. ammonia collection tube, 1-9. overfalling weir.
Fig. 2 is the structural representation in embodiment of the present invention oil removal by air bubbling pond.
In Fig. 2: 2. oil removal by air bubbling pond, 2-1. oil removal by air bubbling pond water inlet pipe, 2-2. oil removal by air bubbling pond water distributor, 2-3. mixing zone, 2-4. catchment area, 2-5. oil-collecting Ji Zhaqu, 2-6. oil removal by air bubbling pond aeration plate, 2-7. gas blower, 2-8. oil removal by air bubbling pond triphase separator, 2-9. overfalling weir, 2-10. dregs of fat scraper plate, 2-11. crackling receiving tank.
Fig. 3 is the structural representation of embodiment of the present invention coagulative precipitation tank.
In Fig. 3: 3. coagulative precipitation tank, 3-1. is uniformly mixed district, 3-2. settling region, 3-3. wastewater inlet pipe, 3-4. liquid add-on system, 3-5. whipping appts, 3-6. baffle plate, 3-7. triphase separator, 3-8. overfalling weir, 3-9. sediment discharge valve.
Fig. 4 (a) is the schematic cross section of embodiment of the present invention electrolyzer, and Fig. 4 (b) is the longitudinal section schematic diagram of embodiment of the present invention electrolyzer.
In Fig. 4 (a), Fig. 4 (b): 4. electrolyzer, 4-1. electrolyzer water inlet pipe, 4-2. electrolyzer rising pipe, 4-3. cathode chamber, 4-4. anode chamber, 4-5. dividing plate, 4-6. positive plate, 4-7. negative plate, 4-8. effuser, 4-9. modification coke powder, 4-10. electrolyzer triphase separator, 4-11. electrolyzer overfalling weir.
Fig. 5 is the structural representation of embodiment of the present invention material filling type anoxic anaerobic reation pool.
In Fig. 5: 5. material filling type anoxic anaerobic reation pool, 5-1. traverse baffle, 5-2. holds concurrently oxygen section, 5-3. anoxic section, 5-4. anaerobism section, 5-5. material filling type anoxic anaerobic reation pool water inlet pipe, 5-6. material filling type anoxic anaerobic reation pool triphase separator, 5-7. material filling type anoxic anaerobic reation pool overfalling weir, 5-8. mud discharging valve, 5-9. upper cover, 5-10. material filling type anoxic anaerobic reation pool effuser, 5-11. filler.
Fig. 6 is the structural representation of embodiment of the present invention reflux formula BAF.
In Fig. 6: 6. reflux formula BAF, 6-1. lower current area, 6-2. ascending zone, 6-3. mud district, 6-4. reflux formula BAF water inlet pipe, 6-5. reflux formula BAF water distributor, 6-6. lower current area filler, 6-7. aeration tube, 6-8. traverse baffle, 6-9. ascending zone filler, 6-10. reflux formula BAF overfalling weir, 6-11. mud discharging valve.
Fig. 7 is the process flow sheet of the embodiment of the present invention.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Embodiment
As shown in Fig. 1 ~ Fig. 7, a kind of coking of coal Waste Water Treatment of the present invention, comprises ammonia stripping pond 1, ammonia cuvette, oil removal by air bubbling pond 2, wastewater equalization pond, coagulative precipitation tank 3, electrolyzer 4, material filling type anoxic anaerobic reation pool 5 and reflux formula BAF 6.
Water inlet pipe 1-1 is provided with bottom described ammonia stripping pond, water inlet pipe is connected with water pump, water inlet pipe exit is provided with water distribution pyrometric cone 1-2, be provided with denitrification additive before pump intake and add metering system 1-3, the middle part in ammonia stripping pond is provided with alkali lye and adds entrance 1-4, the top in ammonia stripping pond is provided with pH value measuring apparatus 1-5, ammonia stripping is provided with aerating system 1-6 bottom pond, the water outlet in ammonia stripping pond is provided with gas-liquid separator 1-7, the upper cover design in ammonia stripping pond coning, conical top is provided with ammonia collection tube 1-8, the fan for discharging ammonia is provided with in ammonia collection tube, ammonia collection tube is communicated with ammonia cuvette, the water outlet top in ammonia stripping pond is provided with overfalling weir 1-9, overfalling weir connects the water inlet pipe of wastewater equalization pond.
The denitrification additive that described denitrification additive adds metering system interpolation is counted by the polyethylene polyamines salt of 20-60% butanone, 20-60% in mass ratio, the hydroxyethyl ether cellulose of 20-40% and the clorox of 20-50% mix, and the add-on of denitrification additive is 20-50ppm.
There is mass concentration to be the sulphuric acid soln of 2-4% in described ammonia cuvette, after absorbing ammonia, generate ammonium sulfate reuse.
Described oil removal by air bubbling pond 2 comprises water inlet pipe 2-1 and the rising pipe for discharging the rear water of process, and described oil removal by air bubbling pond is followed successively by mixing zone 2-3 and disengaging zone from bottom to up; Described disengaging zone comprises catchment area 2-4 and is positioned at the oil-collecting Ji Zha district 2-5 of catchment area; The bottom of the mixing zone in described oil removal by air bubbling pond is provided with aeration plate 2-6, and the top of described aeration plate is provided with water distributor 2-2, and described water distributor connects water inlet pipe 2-1, and described aeration plate 2-6 is connected with the gas blower 2-7 outside oil removal by air bubbling pond by aeration tube; Triphase separator 2-8 is provided with in described disengaging zone, described triphase separator comprise flow deflector and be positioned at below flow deflector with flow deflector with the use of triangle guide ring, described triangle guide ring is arranged on the inwall in oil removal by air bubbling pond, the top of described flow deflector is identical with the shape of disengaging zone, the bottom of described flow deflector is horn-like, and the internal diameter of the bottom of described flow deflector is greater than the internal diameter of triangle guide ring; The top of described disengaging zone outer wall is provided with overfalling weir 2-9, and described overfalling weir is connected with rising pipe; Described oil-collecting Ji Zhaqu is laid with dregs of fat scraper plate 2-10 and crackling receiving tank 2-11; When waste water overflows from the bottom up, water, oil enter the bottom of flow deflector together with scum silica frost by triangle guide ring, oil and scum silica frost continue up to enter oil-collecting Ji Zhaqu, and water enters catchment area by the gap between flow deflector and triangle guide ring; In order to the better effects if of wastewater treatment, described water distributor is arranged to concentric circles or cross shape, water distributor has horizontal radiation water outlet; Further, described aeration plate is the pore type aeration plate being evenly provided with micropore.
Described wastewater equalization pond comprises water inlet pipe and rising pipe, for regulating water quality and the water yield of waste water.
Described coagulative precipitation tank 3 comprises and is uniformly mixed district 3-1 and settling region 3-2, and be uniformly mixed bottom district and be provided with wastewater inlet pipe 3-3, middle and upper part is provided with liquid add-on system 3-4, is provided with whipping appts 3-5 being uniformly mixed in the middle part of district; Baffle plate 3-6 is provided with in described settling region, the inwall of this baffle plate and coagulative precipitation tank 3 forms the waste water runner entering settling region as waste water, the exit of settling region is provided with triphase separator 3-7, the outlet top of settling region is provided with overfalling weir 3-8, the tapered structure of settling region bottom design, is provided with sediment discharge valve 3-9 bottom settling region.
Described electrolyzer 4 is provided with water inlet pipe 4-1 and rising pipe 4-2, and water inlet pipe 4-1 is communicated with the rising pipe of coagulative precipitation tank; Described electrolyzer 4 is left and right two cell structure, be respectively cathode chamber 4-3 and anode chamber 4-4, described cathode chamber 4-3 is communicated with the middle and lower part of anode chamber 4-4, top is separated by dividing plate and is separated by dividing plate 4-5, cathode chamber 4-3 is provided with positive plate 4-6, and anode chamber 4-4 is provided with negative plate 4-7, and positive and negative two battery lead plates connect outside positive-negative power respectively, the top of cathode chamber and anode chamber is conical structure, and the top of conical structure is all provided with effuser 4-8; Further, be positive plate material with ruthenium-iridium-tantalum electrode or ruthenium-iridium-tantalum tin electrode or iridium tantalum Ti electrode or iridium tantalum titanium tin electrode, Ti electrode is negative plate material; Modification coke powder 4-9 is filled with in described electrolyzer; The exit in described wastewater electrolytic pond is provided with triphase separator 4-10, and outlet top is provided with overfalling weir 4-11, and overfalling weir connects rising pipe, and the rising pipe of described electrolyzer is communicated with the water inlet pipe 5-5 of material filling type anoxic anaerobic reation pool.
Further, the making processes of described modification coke powder 4-9: 1. coke powder heat alkali liquid soaks half an hour, after washed with de-ionized water, then soaks half an hour with dilute hydrochloric acid, by washed with de-ionized water, the baking oven putting into 378K dries 6h; 2. Fe (the N0 of 0.5-1mol/L is then immersed in
3)
3in solution, vibrate 6h in the vibrator of 150r/min, by washed with de-ionized water; 3. the product after cleaning dries 6h under 358K condition; 4. under 773K, then calcine 4h obtain modification coke powder.
Described material filling type anoxic anaerobic reation pool 5 comprises the double oxygen section 5-2, anoxic section 5-3 and the anaerobism section 5-4 that are separated into by traverse baffle 5-1, described double oxygen section 5-2 head end is provided with the water inlet pipe 5-5 for feeding waste water, oxygen section 5-2 end of holding concurrently is communicated with anoxic section 5-3 head end, anoxic section 5-3 end is communicated with anaerobism section 5-4 head end, the bottom of described anoxic section 5-3 and anaerobism section 5-4 water inlet side traverse baffle is provided with the corner of 45 degree, the shock action produced when entering to avoid current, thus the effect playing buffering current and water distribution uniformity; Anaerobism section 5-4 end is provided with triphase separator 5-6 and overfalling weir 5-7, and overfalling weir 5-7 connects rising pipe; Described double oxygen section 5-2, anoxic section 5-3 and the tapered structure of anaerobism section 5-4 bottom design, pyramidal structure connects mud discharging valve 5-8; The upper cover 5-9 of the double oxygen section of described material filling type anoxic anaerobic reation pool, anoxic section and anaerobism section is designed to conical structure, and conical structure top is provided with independently methane waste product effuser 5-10; Filler 5-11 is all provided with in described double oxygen section, anoxic section and anaerobism section.
The middle and upper part of described reflux formula BAF 6 is cylindrical, bottom is conical structure, comprises lower current area 6-1, ascending zone 6-2 and mud district 6-3; Described lower current area 6-1 is positioned at the middle part of the cylindrical structural of reflux formula BAF, for cylindrical structural, lower current area top is provided with water inlet pipe 6-4 and water distributor 6-5, filler 6-6 is provided with in the middle part of lower current area, lower current area bottom is provided with aeration tube 6-7, the bottom of described lower current area is provided with traverse baffle 6-8, and the longitudinal section of described traverse baffle 6-8 is horn-like; Described ascending zone 6-2 is positioned at the periphery of lower current area 6-1, the top of traverse baffle, and be provided with filler 6-9 in the middle part of ascending zone, bottom is provided with aeration tube, and the exit on ascending zone top is provided with overfalling weir 6-10; Described mud district 6-3 is positioned at the bottom of the bottom of reflux formula BAF, lower current area and ascending zone, and the bottom in mud district is provided with mud discharging valve 6-11.
The standard water discharge discharge of described reflux formula BAF.
Adopt above-mentioned coking of coal Waste Water Treatment to carry out a method for wastewater treatment, there are following steps:
1. the high-concentration ammonia nitrogenous wastewater that with the addition of denitrification additive enters ammonia stripping pond 1 by water inlet pipe 1-1, its pH value is regulated to be 9-12, under 20-50 DEG C of condition, waste water stops 60-120min and carries out Air Exposure in ammonia stripping pond 1, gas-liquid separator 1-7 realizes the separation of ammonia G&W, free ammonia in waste water drains into ammonia cuvette by ammonia collection tube 1-8, and ammonia is absorbed to generate ammonium sulfate reuse in ammonia cuvette, and waste water enters the water inlet pipe of wastewater equalization pond by overfalling weir 1-9.
2. oily(waste)water enters the middle and lower part in oil removal by air bubbling pond 2 by water inlet pipe 2-1; The aeration plate 2-6 be positioned at below the water inlet pipe of oil removal by air bubbling pond produces a large amount of tiny bubble, the tiny bubble that aeration plate produces and oil slick, dross adherence form mixture and rise under buoyancy, under the effect of disengaging zone, oil removal by air bubbling pond triphase separator 2-8, mixture rises to oil-collecting Ji Zha district 2-5, under the effect of dregs of fat scraper plate 2-10, oil slick and scum silica frost enter crackling receiving tank 2-11 and cleaned outward transport; Water after separating treatment enters oil removal by air bubbling pond catchment area 2-4 under the three-phase separation area flow deflector effect of oil removal by air bubbling pond, is entered the water inlet pipe of wastewater equalization pond by overfalling weir 2-9, rising pipe and pipe connecting.
3. wastewater equalization pond regulating water quality and the water yield is entered from the waste water in ammonia stripping pond 1, the waste water in oil removal by air bubbling pond 2 and other waste water by water inlet pipe.
4. the wastewater inlet pipe 3-3 that the water after regulating is uniformly mixed bottom district by coagulative precipitation tank enters coagulative precipitation tank, mixes with the coagulating agent from liquid add-on system 3-4, utilizes the whipping appts 3-5 be arranged in the middle part of stirring area to stir; Waste water after coagulating enters settling region 3-2, and the triphase separator 3-7 of settling region realizes mud-water separation; Mud sinks to the bottom of coagulative precipitation tank settling region under gravity, is discharged by the sediment discharge valve 3-9 of bottom; Waste water enters the water inlet pipe 4-1 of electrolyzer by overfalling weir 3-8, rising pipe and pipe connecting.
5. the waste water from coagulative precipitation tank enters electrolyzer 4 by water inlet pipe 4-1, waste water saltiness is high, good conductivity, the electrolytic efficiency of the three-diemsnional electrode being granule electrode with modification coke powder 4-9 strengthening three-diemsnional electrode system, pollutent in waste water is by electrolysis, and the gas that in electrolytic process, positive and negative electrode produces is sold or reuse after collecting, being separated drying; Waste water after electrolysis treatment enters the water inlet pipe 5-5 of material filling type anoxic anaerobic reation pool by rising pipe.
6. waste water enters the bottom of material filling type anoxic anaerobic reation pool by the hold concurrently water inlet pipe 5-5 of oxygen section of material filling type anoxic anaerobic reation pool; Waste water advances up and down along traverse baffle 5-1 after entering material filling type anoxic anaerobic reation pool, successively by the Sludge Bed of each reaction chamber of hold concurrently oxygen section 5-2, anoxic section 5-3 and anaerobism section 5-4, mud in reaction tank moves along with the upper current downflow of waste water and the effect of biogas rising, the settlement action of the barrier effect of filler 5-11 and traverse baffle 5-1 and mud self makes again the flow velocity of mud reduce, therefore a large amount of mud is all trapped within reaction tank, and the microorganism in reaction tank fully contacts with the organism in waste water.Hydrolysis of organic matter in waste water is organic acid by the heterotrophic bacterium of the amphimicrobe of oxygen section, anoxic section and the anaerobism section held concurrently, and make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter.Waste water after anaerobic reaction realizes the separation of mud, water, methane gas at the triphase separator 5-6 that anaerobism section end is provided with, mud sinks to the bottom of material filling type anoxic anaerobic reation pool under gravity, and unnecessary mud is discharged by the mud discharging valve 5-8 of bottom; The methane waste product that material filling type anoxic anaerobic reation pool produces collects discharge by reaction tank top effuser 5-10; Waste water after process enters the water inlet pipe 6-4 of reflux formula BAF by overfalling weir 5-7, rising pipe and pipe connecting.
7. waste water is by water inlet pipe 6-4, water distributor 6-5 enters the lower current area 6-1 of reflux formula BAF, the air that aeration tube 6-7 produces and waste water cross generation biochemical reaction in filler 6-6, filler filters waste water simultaneously, waste water is by entering ascending zone 6-2 after traverse baffle 6-8, biochemical reaction is there is in filler 6-9, filler filters waste water simultaneously, the mud that lower current area and ascending zone produce sinks to mud district 6-3, emitted by the mud discharging valve 6-11 bottom mud district, water after the process of reflux formula BAF is by overfalling weir 6-10 and rising pipe qualified discharge.
8. the mud that coagulative precipitation tank 3, material filling type anoxic anaerobic reation pool 5, reflux formula BAF 6 are discharged is transported outward after concentrating, dewatering.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the scope not departing from this invention technological thought.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to right.
Claims (2)
1. a coking of coal Waste Water Treatment, is characterized in that: comprise ammonia stripping pond (1), ammonia cuvette, oil removal by air bubbling pond (2), wastewater equalization pond, coagulative precipitation tank (3), electrolyzer (4), material filling type anoxic anaerobic reation pool (5) and reflux formula BAF (6);
Water inlet pipe (1-1) is provided with bottom described ammonia stripping pond, water inlet pipe is connected with water pump, water inlet pipe exit is provided with water distribution pyrometric cone (1-2), be provided with denitrification additive before pump intake and add metering system (1-3), the middle part in ammonia stripping pond is provided with alkali lye and adds entrance (1-4), the top in ammonia stripping pond is provided with pH value measuring apparatus (1-5), aerating system (1-6) is provided with bottom ammonia stripping pond, the water outlet in ammonia stripping pond is provided with gas-liquid separator (1-7), the upper cover design in ammonia stripping pond coning, conical top is provided with ammonia collection tube (1-8), the fan for discharging ammonia is provided with in ammonia collection tube, ammonia collection tube is communicated with ammonia cuvette, the water outlet top in ammonia stripping pond is provided with overfalling weir (1-9), overfalling weir connects the water inlet pipe of wastewater equalization pond,
The denitrification additive that described denitrification additive adds metering system interpolation is counted by the polyethylene polyamines salt of 20-60% butanone, 20-60% in mass ratio, the hydroxyethyl ether cellulose of 20-40% and the clorox of 20-50% mix, and the add-on of denitrification additive is 20-50ppm;
There is mass concentration to be the sulphuric acid soln of 2-4% in described ammonia cuvette, after absorbing ammonia, generate ammonium sulfate reuse;
Described oil removal by air bubbling pond (2) comprises water inlet pipe (2-1) and the rising pipe for discharging the rear water of process, and described oil removal by air bubbling pond is followed successively by mixing zone (2-3) and disengaging zone from bottom to up; Described disengaging zone comprises catchment area (2-4) and is positioned at the oil-collecting Ji Zhaqu (2-5) of catchment area; The bottom of the mixing zone in described oil removal by air bubbling pond is provided with aeration plate (2-6), the top of described aeration plate is provided with water distributor (2-2), described water distributor connects water inlet pipe (2-1), and described aeration plate (2-6) is connected with the gas blower (2-7) outside oil removal by air bubbling pond by aeration tube; Triphase separator (2-8) is provided with in described disengaging zone, described triphase separator comprise flow deflector and be positioned at below flow deflector with flow deflector with the use of triangle guide ring, described triangle guide ring is arranged on the inwall in oil removal by air bubbling pond, the top of described flow deflector is identical with the shape of disengaging zone, the bottom of described flow deflector is horn-like, and the internal diameter of the bottom of described flow deflector is greater than the internal diameter of triangle guide ring; The top of described disengaging zone outer wall is provided with overfalling weir (2-9), and described overfalling weir is connected with rising pipe; Described oil-collecting Ji Zhaqu is laid with dregs of fat scraper plate (2-10) and crackling receiving tank (2-11); When waste water overflows from the bottom up, water, oil enter the bottom of flow deflector together with scum silica frost by triangle guide ring, oil and scum silica frost continue up to enter oil-collecting Ji Zhaqu, and water enters catchment area by the gap between flow deflector and triangle guide ring; In order to the better effects if of wastewater treatment, described water distributor is arranged to concentric circles or cross shape, water distributor has horizontal radiation water outlet; Further, described aeration plate is the pore type aeration plate being evenly provided with micropore;
Described wastewater equalization pond comprises water inlet pipe and rising pipe, for regulating water quality and the water yield of waste water;
Described coagulative precipitation tank (3) comprises and is uniformly mixed district (3-1) and settling region (3-2), be uniformly mixed bottom district and be provided with wastewater inlet pipe (3-3), middle and upper part is provided with liquid add-on system (3-4), is provided with whipping appts (3-5) being uniformly mixed in the middle part of district; Baffle plate (3-6) is provided with in described settling region, the inwall of this baffle plate and coagulative precipitation tank forms the waste water runner entering settling region as waste water, the exit of settling region is provided with triphase separator (3-7), the outlet top of settling region is provided with overfalling weir (3-8), the tapered structure of settling region bottom design, is provided with sediment discharge valve (3-9) bottom settling region;
Described electrolyzer (4) is provided with water inlet pipe (4-1) and rising pipe (4-2), and water inlet pipe (4-1) is communicated with the rising pipe of coagulative precipitation tank; Described electrolyzer (4) is left and right two cell structure, be respectively cathode chamber (4-3) and anode chamber (4-4), described cathode chamber (4-3) is communicated with the middle and lower part of anode chamber (4-4), top is separated by dividing plate (4-5), cathode chamber (4-3) is provided with positive plate (4-6), anode chamber (4-4) is provided with negative plate (4-7), positive and negative two battery lead plates connect outside positive-negative power respectively, the top of cathode chamber and anode chamber is conical structure, and the top of conical structure is all provided with effuser (4-8); Further, be positive plate material with ruthenium-iridium-tantalum electrode or ruthenium-iridium-tantalum tin electrode or iridium tantalum Ti electrode or iridium tantalum titanium tin electrode, Ti electrode is negative plate material; Modification coke powder (4-9) is filled with in described electrolyzer; The exit in described wastewater electrolytic pond is provided with triphase separator (4-10), outlet top is provided with overfalling weir (4-11), overfalling weir connects rising pipe, and the rising pipe of described electrolyzer is communicated with the water inlet pipe (5-5) of material filling type anoxic anaerobic reation pool;
Further, the making processes of described modification coke powder (4-9): 1. coke powder heat alkali liquid soaks half an hour, after washed with de-ionized water, then soaks half an hour with dilute hydrochloric acid, by washed with de-ionized water, the baking oven putting into 378K dries 6h; 2. Fe (the N0 of 0.5-1mol/L is then immersed in
3)
3in solution, vibrate 6h in the vibrator of 150r/min, by washed with de-ionized water; 3. the product after cleaning dries 6h under 358K condition; 4. under 773K, then calcine 4h obtain modification coke powder;
Described material filling type anoxic anaerobic reation pool (5) comprise be separated into by traverse baffle (5-1) double oxygen section (5-2), anoxic section (5-3) and anaerobism section (5-4), described double oxygen section (5-2) head end is provided with the water inlet pipe (5-5) for feeding waste water, oxygen section (5-2) end of holding concurrently is communicated with anoxic section (5-3) head end, and anoxic section (5-3) end is communicated with anaerobism section (5-4) head end; The bottom of the water inlet side traverse baffle of described anoxic section (5-3) and anaerobism section (5-4) is provided with the corner of 45 degree, the shock action produced when entering to avoid current, thus the effect playing buffering current and water distribution uniformity; Anaerobism section (5-4) end is provided with triphase separator (5-6) and overfalling weir (5-7), and overfalling weir (5-7) connects rising pipe; Described double oxygen section (5-2), anoxic section (5-3) and the tapered structure of anaerobism section (5-4) bottom design, pyramidal structure connects mud discharging valve (5-8); The upper cover (5-9) of the double oxygen section of described material filling type anoxic anaerobic reation pool, anoxic section and anaerobism section is designed to conical structure, and conical structure top is all provided with methane waste product effuser (5-10); Filler (5-11) is all provided with in described double oxygen section, anoxic section and anaerobism section;
The middle and upper part of described reflux formula BAF (6) is cylindrical, bottom is conical structure, comprises lower current area (6-1), ascending zone (6-2) and mud district (6-3); Described lower current area (6-1) is positioned at the middle part of the cylindrical structural of reflux formula BAF, for cylindrical structural, lower current area top is provided with water inlet pipe (6-4) and water distributor (6-5), filler (6-6) is provided with in the middle part of lower current area, lower current area bottom is provided with aeration tube (6-7), the bottom of described lower current area is provided with traverse baffle (6-8), and the longitudinal section of described traverse baffle (6-8) is horn-like; Described ascending zone (6-2) is positioned at the periphery of lower current area (6-1), the top of traverse baffle, filler (6-9) is provided with in the middle part of ascending zone, bottom is provided with aeration tube, and the exit on ascending zone top is provided with overfalling weir (6-10); Described mud district (6-3) is positioned at the bottom of the bottom of reflux formula BAF, lower current area and ascending zone, and the bottom in mud district is provided with mud discharging valve (6-11);
The standard water discharge discharge of described reflux formula BAF.
2. adopt coking of coal Waste Water Treatment as claimed in claim 1 to carry out a method for wastewater treatment, there are following steps:
1. the high-concentration ammonia nitrogenous wastewater that with the addition of denitrification additive enters ammonia stripping pond (1) by water inlet pipe (1-1), its pH value is regulated to be 9-12, under 20-50 DEG C of condition, in ammonia stripping pond (1), the middle 60-120min that stops carries out Air Exposure to waste water, gas-liquid separator (1-7) realizes the separation of ammonia G&W, free ammonia in waste water drains into ammonia cuvette by ammonia collection tube (1-8), ammonia is absorbed to generate ammonium sulfate reuse in ammonia cuvette, and waste water enters the water inlet pipe of wastewater equalization pond by overfalling weir (1-9);
2. oily(waste)water enters the middle and lower part of oil removal by air bubbling pond (2) by water inlet pipe (2-1); The aeration plate (2-6) be positioned at below the water inlet pipe of oil removal by air bubbling pond produces a large amount of tiny bubble, the tiny bubble that aeration plate produces and oil slick, dross adherence form mixture and rise under buoyancy, under the effect of disengaging zone, oil removal by air bubbling pond triphase separator (2-8), mixture rises to oil-collecting Ji Zhaqu (2-5), under the effect of dregs of fat scraper plate (2-10), oil slick and scum silica frost enter crackling receiving tank (2-11) and cleaned outward transport; Water after separating treatment enters catchment area, oil removal by air bubbling pond (2-4) under the three-phase separation area flow deflector effect of oil removal by air bubbling pond, is entered the water inlet pipe of wastewater equalization pond by overfalling weir (2-9), rising pipe and pipe connecting;
3. wastewater equalization pond regulating water quality and the water yield is entered from the waste water in ammonia stripping pond (1), the waste water of oil removal by air bubbling pond (2) and other waste water by water inlet pipe;
4. the wastewater inlet pipe (3-3) that the water after regulating is uniformly mixed bottom district by coagulative precipitation tank enters coagulative precipitation tank, mix with the coagulating agent from liquid add-on system (3-4), utilize the whipping appts (3-5) be arranged in the middle part of stirring area to stir; Waste water after coagulating enters settling region (3-2), and the triphase separator (3-7) of settling region realizes mud-water separation; Mud sinks to the bottom of coagulative precipitation tank settling region under gravity, is discharged by the sediment discharge valve (3-9) of bottom; Waste water enters the water inlet pipe (4-1) of electrolyzer by overfalling weir (3-8), rising pipe and pipe connecting;
5. the waste water from coagulative precipitation tank enters electrolyzer (4) by water inlet pipe (4-1), waste water saltiness is high, good conductivity, the electrolytic efficiency of the three-diemsnional electrode being granule electrode with modification coke powder (4-9) strengthening three-diemsnional electrode system, pollutent in waste water is by electrolysis, and the gas that in electrolytic process, positive and negative electrode produces is sold or reuse after collecting, being separated drying; Waste water after electrolysis treatment enters the water inlet pipe (5-5) of material filling type anoxic anaerobic reation pool by rising pipe;
6. waste water enters the bottom of material filling type anoxic anaerobic reation pool by the hold concurrently water inlet pipe (5-5) of oxygen section of material filling type anoxic anaerobic reation pool; Advance up and down along traverse baffle (5-1) after waste water enters material filling type anoxic anaerobic reation pool, successively by the Sludge Bed of each reaction chamber of hold concurrently oxygen section (5-2), anoxic section (5-3) and anaerobism section (5-4), mud in reaction tank moves along with the upper current downflow of waste water and the effect of biogas rising, the barrier effect of filler (5-11) and traverse baffle (5-1) and the settlement action of mud self make again the flow velocity of mud reduce, therefore a large amount of mud is all trapped within reaction tank, and the microorganism in reaction tank fully contacts with the organism in waste water; Hydrolysis of organic matter in waste water is organic acid by the heterotrophic bacterium of the amphimicrobe of oxygen section, anoxic section and the anaerobism section held concurrently, and make larger molecular organics be decomposed into small organic molecule, insoluble organism changes into dissolved organic matter; Waste water after anaerobic reaction realizes the separation of mud, water, methane gas at the triphase separator (5-6) that anaerobism section end is provided with, mud sinks to the bottom of material filling type anoxic anaerobic reation pool under gravity, and unnecessary mud is discharged by the mud discharging valve (5-8) of bottom; The methane waste product that material filling type anoxic anaerobic reation pool produces collects discharge by reaction tank top effuser (5-10); Waste water after process enters the water inlet pipe (6-4) of reflux formula BAF by overfalling weir (5-7), rising pipe and pipe connecting;
7. waste water is by water inlet pipe (6-4), water distributor (6-5) enters the lower current area (6-1) of reflux formula BAF, the air that aeration tube (6-7) produces and waste water cross generation biochemical reaction in filler (6-6), filler filters waste water simultaneously, waste water enters ascending zone (6-2) by after traverse baffle (6-8), biochemical reaction is there is in filler (6-9), filler filters waste water simultaneously, the mud that lower current area and ascending zone produce sinks to mud district (6-3), emitted by the mud discharging valve (6-11) bottom mud district, water after the process of reflux formula BAF is by overfalling weir (6-10) and rising pipe qualified discharge,
8. the mud that coagulative precipitation tank (3), material filling type anoxic anaerobic reation pool (5), reflux formula BAF (6) are discharged is transported outward after concentrating, dewatering.
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| CN107055884A (en) * | 2017-03-31 | 2017-08-18 | 常州大学 | A kind of nitrogen phosphorus waste water separating and treating apparatus |
| CN108821308A (en) * | 2018-08-16 | 2018-11-16 | 山西长林能源科技有限公司 | The method and device of high concentration ammonium hydroxide is produced using residual coking ammonia water |
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