CN102583892B - Symmetrical opposite three-dimensional circular-flow integration oxidation ditch - Google Patents
Symmetrical opposite three-dimensional circular-flow integration oxidation ditch Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention relates to a symmetrical opposite three-dimensional circular-flow integration oxidation ditch, comprising two air-lifting flow-pushing three-dimensional circular oxidation ditches. Each ditch body is provided with a horizontal clapboard, and each oxic zone and each anoxic zone are respectively arranged in each upper ditch and each lower ditch; one end of each horizontal clapboard is connected with each inclined guide wall, and each transition anoxic zone is arranged at the other end of each horizontal clapboard; and each air-lifting oxic zone is arranged between each inclined guide wall and the end wall of each ditch body. The symmetrical opposite three-dimensional circular-flow integration oxidation ditch is characterized by being a rectangular integration oxidation ditch consisting of the two air-lifting flow-pushing three-dimensional circular oxidation ditches which have the same structure, are communicated by the transition anoxic zones and are opposite and symmetrical, wherein a double-shaft converter is arranged between the two horizontal clapboards and is lower than the horizontal clapboards; the two sides of the double-shaft converter are connected with horizontal rotating shafts along the horizontal direction of the ditch; a guide pulp board is arranged on the horizontal rotating shafts; and the top of the double-shaft converter is connected with a vertical rotating shaft driven by a reduction motor. The symmetrical opposite three-dimensional circular-flow integration oxidation ditch has the beneficial effects that a denitrification effect is improved, mud does not exist at the bottom of the ditch, water quality is stable, and the cost is low.
Description
Technical field
The present invention relates to a kind of dirt, waste water disposal facility, relate in particular to the three-dimensional in opposite directions cycling stream integrated oxidation ditch of a kind of symmetrical expression.
Background technology
Oxidation ditch is the extended aeration activated sludge process water technology with mixing fully and whole plug-flow hydromechanics feature, and dirt, waste water and active sludge mix in sealing ditch shape passage and circulate.Because the hydraulic characteristic of " closed circulation flows " of its uniqueness and the characteristics of longer mud age and low organic loading, it is good to make it become effluent quality, strong shock resistance, stable, mud discharge capacity low and one-time construction investment and the lower water technology of working cost are widely used in municipal effluent and Industrial Wastewater Treatment.Last century the nineties, cooperating the micro-hole aerator technology with impeller under water is that the deep channel type oxidation channel of representative rises rapidly, it has been inherited the characteristics of conventional oxidation ditch and when improving oxygen-transfer efficiency, has solved oxidation ditch bottom of trench easily heavy mud and the big problem of occupation of land more effectively.In recent years, build whole Round Sump oxidation ditch in same structures jointly with functional pools such as solid-liquid separator, anaerobic pond, anoxic pond and oxidation ditch tap drain, also claim integrated oxidation ditch, be widely used, it is with the multiple ditch type array mode reply complicated influent quality different with various functional pools, when removing the carbon source pollutent, effectively promoted dephosphorization and denitrification effect, more since whole Round Sump oxidation ditch at the cancellation second pond, effectively reduce take up an area of in, realized that mixed solution does not have blowback stream function, therefore also embodied energy-conservation effect.At present, be that the oxidation ditch of new generation of feature has been walked out the laboratory and come out one after another with three-dimensional cycling stream.It is being inherited on earlier generations oxidation ditch, the especially basis of integrated oxidation ditch plurality of advantages, and the contribution aspect lifting denitrification effect and minimizing occupation of land is more outstanding.The three-dimensional cycling stream integrated oxidation ditch of gas lift plug-flow in the three-dimensional cycling stream oxidation ditch family is more single, energy-conservation at equipment to have outstanding performance, extremely industry concern aspect simple with operation.
The patent ZL200810053029.0 that has reported " Zanjon type gas-lift stream-pull tridimensional circulation type inversion A2O integral co-construction oxidation ditch " is intended to the gas lift impellent of utilizing aeration process to produce, when realizing the integral body promotion of mixed solution in the oxidation ditch raceway groove, make the three-dimensional circulation of mixed solution and realize aerobic and the anoxic subregion by horizontal baffle is set, reach improve nitrogen removal rate, energy-conservation, reduce the equipment installed capacity and further reduce the purpose that oxidation ditch takes up an area of.The patent ZL201010150135.8 of follow-up report " the funneling solid-liquid separator of bar shaped and use the gas lifting pulsation push flowing tridimensional circulating oxidation ditch of this solid-liquid separator " is on above-mentioned patent basis, has done further improvement.Its structure is to be provided with gas lift aerobic zone, aerobic zone, solid-liquid displacement zone, transition oxygen-starved area, oxygen-starved area in oxidation ditch ditch body, be provided with the horizontal baffle that the ditch body is divided into upper and lower two-layer raceway groove in the middle and lower part of ditch body, aerobic zone is located at top-layer channel, and lower floor's raceway groove is located in the oxygen-starved area; It is the inclination training wall of vertical headwall that horizontal baffle one end connects to its outside oblique upper extension and top, and the gas lift aerobic zone is located between inclination training wall and the ditch body headwall, and the ditch body arranges the micro-hole aerator group in gas lift aerobic zone bottom; Be the transition oxygen-starved area at the horizontal baffle the other end, solid-liquid displacement zone is located between the aerobic zone and transition oxygen-starved area of top-layer channel.Solid-liquid displacement zone has adopted the funneling solid-liquid separator of bar shaped, and is provided with chute at solid-liquid separator, in order to strengthen the hydraulic disturbance on top layer, transition oxygen-starved area, improves water inlet and mixed solution mixed effect.The micro-hole aerator group has been set up intermittent gas supply aerator group on the basis of adopting conventional continuous air feed aerator group, to prevent that active sludge from sinking and to promote that denitrification process fully carries out.This gas lifting pulsation push flowing tridimensional circulating oxidation ditch is at simplified construction, and is energy-conservation, improves the effluent quality aspect and obtained positively effect.
Current, oxidation Ditch Technology is still towards with abundant excavation with utilize conventional oxidation ditch hydraulic characteristic, with further minimizing occupation of land and construction fund, energy-conservation, further lifting water treatment effect, especially denitrogenation dephosphorizing effect and the running cost that reduces are that the direction that new ditch type, energy-efficient equipment and the simple operation mode of target studied develops.Make a general survey of existing gas lift plug-flow tridimensional circulation type oxidation ditch and still have certain technological deficiency: be mainly reflected in: (1) does not deposit mud because keeping higher circulation velocity really to make bottom of trench, thereby causes the short denitrification effect that has influence on of denitrification process; (2) be proportional relation because of aerator diving depth and energy consumption, therefore limited height, the length ratio of the three-dimensional cycling stream oxidation ditch of gas lift push flowing, single ditch scale of construction is difficult to amplify, cause thus handle the water yield must many ditches when big and build, improved civil engineering costs; (3) adopt intermittent gas supply micro-hole aerator group, make micro-pore aeration equipment fragile, improve equipment cost; (4) solid-liquid separator of Cai Yonging because of in established chute and take space in the device, reduce desilting area, influence separating effect, make the increase of construction and installation cost because of the structure relative complex simultaneously.
Summary of the invention
Main purpose of the present invention is at the problems referred to above, provide a kind of basis at existing gas lift plug-flow tridimensional circulation type oxidation ditch to carry out improvement on the body structure of pond, provide that a kind of denitrification effect is better, do not deposit that more easy, the single ditch scale of construction of mud, stable effluent quality, operation is big, construction cost is low, the three-dimensional in opposite directions cycling stream integrated oxidation ditch of symmetrical expression of suitable sizable application demand at the bottom of the pond.
The technical solution adopted for the present invention to solve the technical problems is:
The three-dimensional in opposite directions cycling stream integrated oxidation ditch of a kind of symmetrical expression, comprise gas lift plug-flow tridimensional circulation type oxidation ditch, in its ditch body, be provided with gas lift aerobic zone, aerobic zone, solid-liquid displacement zone, transition oxygen-starved area, oxygen-starved area, be provided with the horizontal baffle that the ditch body is divided into upper and lower two-layer raceway groove in the middle and lower part of ditch body, described aerobic zone is located at top-layer channel, and lower floor's raceway groove is located in described oxygen-starved area; It is the inclination training wall of vertical headwall that horizontal baffle one end connects to its outside oblique upper extension and top, and described gas lift aerobic zone is located between inclination training wall and the ditch body headwall, and the ditch body arranges the micro-hole aerator group in gas lift aerobic zone bottom; Be the transition oxygen-starved area at the horizontal baffle the other end, solid-liquid displacement zone is located between the aerobic zone and transition oxygen-starved area of top-layer channel, the ditch body is provided with water inlet pipe, rising pipe and shore pipe, it is characterized in that the three-dimensional in opposite directions cycling stream integrated oxidation ditch of described symmetrical expression is to be communicated with rectangle integrated oxidation ditch that in opposite directions symmetrically arranged another gas lift plug-flow tridimensional circulation type oxidation ditch constitute with identical with its structure by both walls butt joint, transition oxygen-starved area by a described gas lift plug-flow tridimensional circulation type oxidation ditch; Central authorities at described rectangle integrated oxidation ditch, between the two symmetrical horizontal baffles and the position that is lower than two horizontal baffles arranges the twin shaft reverser, an end that connects a horizontal rotating shaft along the horizontal described twin shaft reverser both sides of rectangle integrated oxidation ditch respectively, on the described horizontal rotating shaft fixedly the suit cross section be ∫ shape, the centre is provided with the bar shaped water conservancy diversion pulpboard of axis hole, the other end of horizontal rotating shaft is supported on the rectangle integrated oxidation ditch side wall, the fixedly connected vertical rotating shaft that is driven by reducing motor in the input aperture at twin shaft reverser top, reducing motor is fixedly mounted on rectangle integrated oxidation ditch top.
The solid-liquid separator that described solid-liquid displacement zone adopts is the funneling solid-liquid separator of bar shaped, comprise the settling section of crowding around solid-liquid displacement zone that is vertically connected between described rectangle integrated oxidation ditch both walls, two vertical headwalls of disengaging zone and settling region, be positioned at settling section and replace assembly with vertical headwall some receipts mill weirs arranged side by side connected vertically and the heavy mud of being located at the settling region, described vertical headwall comprises influent side headwall and water outlet side headwall, be provided with the bar shaped water leg that is vertically connected between rectangle integrated oxidation ditch both walls in water outlet side headwall outer upper, described some receipts mill weirs arranged side by side are located between influent side headwall and the water outlet side headwall, and are communicated with water leg by the corresponding receipts mill weir water outlet that arranges on the water outlet side headwall; Described heavy mud is set between the influent side headwall of corresponding settling region and water outlet side headwall replaces assembly, this assembly is the bar shaped funnel group that the bar shaped funnel vertical fixing by a plurality of connections arranged side by side forms between influent side headwall and water outlet side headwall.
The vertical training wall section that a plurality of and described rectangle integrated oxidation ditch both walls and horizontal baffle are fixedlyed connected is set in described horizontal baffle bottom.
The invention has the beneficial effects as follows: the three-dimensional in opposite directions cycling stream integrated oxidation ditch of the symmetrical expression that (1) provides comprises two symmetrically arranged in opposite directions gas lift plug-flow tridimensional circulation type oxidation ditches, and the water conservancy diversion pulpboard is set, periodically control the flow direction from the converging of two symmetrical oxygen-starved areas, bump, sinking mixed solution by the water conservancy diversion pulpboard, realize the distribution of mixed solution flow, make two symmetrical horizontal baffle bottoms respectively periodically by the impingement flow of big flow velocity, can effectively solve the heavy mud problem of bottom of trench portion; And adjust the mixed solution hydraulic detention time, and realize the optimum reacting time of oxygen-starved area denitrification process, promote denitrification effect; (2) by stirring naturally that two-way mixed solution cycling stream confluxes in opposite directions and produces, under the prerequisite that power is not provided, promoted the complete mixing functions of oxidation ditch, make the ability of its anti-shock loading stronger, can make solid-liquid separator save chute, when simplifying the solid-liquid separator structure, promote the effect of its solid-liquid separation, and cost is cheaper; The setting of the gas lift aerobic zone of (3) two symmetries, aerobic zone, oxygen-starved area, the length of gas lift plug-flow tridimensional circulation type oxidation ditch is extended, efficiently solve thus single ditch scale of construction that the restriction because of the type oxidation ditch length aspect ratio causes little, handle the problem that the water yield is low and civil engineering costs is higher; (4) compared with prior art, saved intermittent gas supply micro-hole aerator group, save energy prolongs the life-span that micro-pore aeration equipment uses; (5) adopt two symmetrically arranged in opposite directions gas lift plug-flow tridimensional circulation type oxidation ditches, and the water conservancy diversion pulpboard is set, actual is to form two strands of symmetrical in opposite directions three-dimensional cycling streams of oxidation ditch and make up long waterpower path and passage.The desirable circulating fluidized useful contribution that brings is to oxidation ditch in the foundation of the three-dimensional cycling stream of symmetry: flow still along aerobic at mixed solution, solid-liquid separation, anoxic zones periodically flows respectively, when bringing into play inherent function, forming two bursts of main flows again converges at the ditch meta, bump, Fen Liu situation again, in fact play mixed solution and the former water that enters, between mixed solution and the mixed solution more sufficient stirring with mix, this stirring mixes with the cycling stream of mixed phase than single-pathway, disperse, the effect of polymerization is more outstanding, this makes the impact resistance of oxidation ditch strengthen, it is littler to former water slug effects of load to handle water outlet, and effluent characteristics is more stable.The foundation of the three-dimensional cycling stream of symmetry is to oxidation ditch " mixed type fully " and the lifting of " whole push flowing " hydromechanics advantage in " mixing fully " function aspects, and this lifting is not cost to increase power-equipment and energy, has higher economical and practical value.Simultaneously, the oxygen-starved area flow velocity that the reallocation of percussion flow realizes and the periodicity adjustment of hydraulic detention time, integral body has promoted the denitrification effect of oxidation ditch when effectively solving the heavy mud problem of bottom of trench.
Description of drawings
Fig. 1 is plan structure synoptic diagram of the present invention;
Fig. 2 is the A-A sectional view of Fig. 2;
Fig. 3 is the structural representation of water conservancy diversion pulpboard of the present invention and twin shaft reverser part;
Fig. 4 is the structural representation of the funneling solid-liquid separator of bar shaped of the present invention.
Among the figure: the three-dimensional in opposite directions cycling stream integrated oxidation ditch of 1 symmetrical expression, 1A, 1B gas lift plug-flow tridimensional circulation type oxidation ditch, 11,11 ' transition oxygen-starved area, 12,12 ' solid-liquid displacement zone, 13,13 ' aerobic zone, 14,14 ' gas lift aerobic zone, 15,15 ' ditch body headwall, 16,16 ' oxygen-starved area, 17 rectangle integrated oxidation ditch side walls, 17A, 17B gas lift plug-flow tridimensional circulation type oxidation ditch ditch side wall, 2, the solid-liquid separator of the three-dimensional in opposite directions cycling stream integrated oxidation ditch of 2 ' symmetrical expression, 21,21 ' solid-liquid separator influent side headwall, 22,22 ' solid-liquid separator water outlet side headwall, 221 receive mill weir water outlet, 23,23 ' water leg, 24,24 ' bar shaped funnel group, 25 bar shaped funnels, 26 stripe board, 27,27 ' receipts mill weir, 28,28 ' settling section, 29,29 ' disengaging zone, 30,30 ' settling region, 3,3 ' inclination training wall, 4,4 ' micro-hole aerator group, 5,5 ' horizontal baffle, 51,51 ' vertically training wall sections, 6 reducing motors, 61 frame plates, 71 vertical rotating shafts, 72,73 horizontal rotating shafts, 74 pedestals, 8 twin shaft reversers, 81 water inlet pipes, 82,82 ' rising pipe, 83,83 ' shore pipe, 9 water conservancy diversion pulpboards.
Below in conjunction with drawings and Examples to the detailed description of the invention.
Embodiment
Fig. 1～Fig. 4 illustrates the three-dimensional in opposite directions cycling stream integrated oxidation ditch of a kind of symmetrical expression and local structure thereof, comprise gas lift plug-flow tridimensional circulation type oxidation ditch 1A, in its ditch body, be provided with gas lift aerobic zone 14, aerobic zone 13, solid-liquid displacement zone 12, transition oxygen-starved area 11, oxygen-starved area 16, be provided with the horizontal baffle 5 that the ditch body is divided into upper and lower two-layer raceway groove in the middle and lower part of ditch body, above-mentioned aerobic zone 13 is located at top-layer channel, and lower floor's raceway groove is located in above-mentioned oxygen-starved area 16; It is the inclination training wall 3 of vertical headwall that one end of horizontal baffle 5 connects to its outside oblique upper extension and top, above-mentioned gas lift aerobic zone 14 is located between inclination training wall 3 and the ditch body headwall 15, at gas lift aerobic zone 14 bottom ditch bodies micro-hole aerator group 4 is set, the micro-hole aerator group adopts continuous air feed micro-hole aerator group; At the horizontal baffle the other end transition oxygen-starved area 11 is set, solid-liquid displacement zone 12 is located between the aerobic zone 13 and transition oxygen-starved area 11 of top-layer channel, and ditch body 1A is provided with water inlet pipe, rising pipe and shore pipe.
The invention is characterized in that the three-dimensional in opposite directions cycling stream integrated oxidation ditch 1 of above-mentioned symmetrical expression is with identical with its structure and be communicated with the rectangle integrated oxidation ditch that symmetrically arranged in opposite directions another gas lift plug-flow tridimensional circulation type oxidation ditch 1B constitutes by the butt joint of two ditch side walls, transition oxygen-starved area by above-mentioned gas lift plug-flow tridimensional circulation type oxidation ditch 1A.As shown in Figure 1 and Figure 2, gas lift plug-flow tridimensional circulation type oxidation ditch 1B and gas lift plug-flow tridimensional circulation type oxidation ditch 1A liquid stream be arranged with in opposite directions transition oxygen-starved area 11 ', solid-liquid displacement zone 12 ', aerobic zone 13 ', gas lift aerobic zone 14 ', ditch body headwall 15 ', oxygen-starved area 16 ', ditch side wall 17B, inclination training wall 3 ', micro-hole aerator group 4 ', horizontal baffle 5 '.Two ditch side wall 17A, 17B butt joint constitutes the side wall 17 of rectangle integrated oxidation ditch of the present invention, and ditch body headwall 15,15 ' also is the headwall of rectangle integrated oxidation ditch, and two transition oxygen-starved areas 11,11 ' connection form the two-way mixed solution cycling stream zone of confluxing in opposite directions.
The central authorities of above-mentioned rectangle integrated oxidation ditch, two symmetrical horizontal baffles 5,5 ' between and the position that is lower than two horizontal baffles twin shaft reverser 8 is set, along the rectangle integrated oxidation ditch laterally, the both sides of above-mentioned twin shaft reverser 8 connect horizontal rotating shaft 72, an end of 73 respectively, on the above-mentioned horizontal rotating shaft 72,73 respectively fixedly the suit cross section be the bar shaped water conservancy diversion pulpboard 9 that ∫ shape, centre are provided with axis hole, horizontal rotating shaft 72,73 the other end are supported on respectively on the both walls 17 of rectangle integrated oxidation ditch by pedestal 74.The fixedly connected vertical rotating shaft 71 that is driven by reducing motor 6 in the input aperture at the top of twin shaft reverser 8, reducing motor 6 is fixedly mounted on rectangle integrated oxidation ditch top by the frame plate 61 that is arranged at rectangle integrated oxidation ditch top.In this example, two gas lift plug-flow tridimensional circulation type oxidation ditch 1A, 1B share a water inlet pipe, and namely water inlet pipe 81 is arranged on the bottom center position of rectangle integrated oxidation ditch 1.The aerobic zone 13,13 of rectangle integrated oxidation ditch ' in, respectively horizontal baffle 5,5 separately ' with the corner of inclination training wall 3,3 ' be connected arrange shore pipe 83,83 '.
As Fig. 1, Fig. 2, shown in Figure 4, the solid-liquid separator that above-mentioned solid-liquid displacement zone 12 adopts is the funneling solid-liquid separator 2 of bar shaped, comprise the settling section of crowding around solid-liquid displacement zone 28 that is vertically connected between above-mentioned rectangle integrated oxidation ditch both walls, two vertical headwalls of disengaging zone 29 and settling region 30, be positioned at settling section and replace assembly with vertical headwall some receipts mill weirs 27 arranged side by side connected vertically and the heavy mud of being located at the settling region, vertically headwall comprises influent side headwall 21 and water outlet side headwall 22, be provided with the bar shaped water leg 23 that is vertically connected between rectangle integrated oxidation ditch both walls in water outlet side headwall outer upper, above-mentioned some receipts mill weirs 27 arranged side by side are located between influent side headwall 21 and the water outlet side headwall 22, and are communicated with water leg 23 by the corresponding receipts mill weir water outlet 221 that arranges on the water outlet side headwall 22; Heavy mud is set between the influent side headwall of corresponding settling region and water outlet side headwall replaces assembly, this assembly is the bar shaped funnel group that bar shaped funnel 25 vertical fixing by a plurality of connections arranged side by side form between influent side headwall and water outlet side headwall.The funneling solid-liquid separator 2 of the bar shaped that the present invention adopts was to have saved chute with the difference of the funneling solid-liquid separator of bar shaped of the prior art, made designs simplification, and taking up room in the device reduces, and has increased desilting area and has improved separating effect.As shown in Figure 1 and Figure 2, gas lift plug-flow tridimensional circulation type oxidation ditch 1B be provided with the funneling solid-liquid separator 2 of the bar shaped identical and symmetrically arranged bar shaped of funneling solid-liquid separator 2 structures '.The funneling solid-liquid separator 2 of bar shaped, 2 ' water leg 23,23 ' connect respectively rising pipe 82,82 '.
A plurality of vertical training wall sections 51 of fixedlying connected with rectangle integrated oxidation ditch both walls 17 and horizontal baffle 5 are set in the bottom of above-mentioned horizontal baffle 5.With horizontal baffle 5 symmetries, horizontal baffle 5 ' the bottom arrange equally a plurality of vertical training wall sections 51 '.
Working process and the principle of symmetrical in opposite directions three-dimensional cycling stream integrated oxidation ditch provided by the invention are as follows:
Fig. 1～Fig. 4 shows the structure of the three-dimensional in opposite directions cycling stream integrated oxidation ditch 1 of symmetrical expression, as shown in the figure, wherein among two gas lift plug-flow tridimensional circulation type oxidation ditch 1A, the 1B respectively symmetry be provided with 5 functional areas in opposite directions: gas lift aerobic zone 14,14 ', aerobic zone 13,13 ', solid-liquid displacement zone 12,12 ', transition oxygen-starved area 11,11 ' and oxygen- starved area 16,16 '.During work, former water from water inlet pipe 81 enter the two transition oxygen-starved areas 11,11 that be communicated with to merge ', with from the aerobic zone 14,14 of top-layer channel ' two flow in opposite directions, mixed solutions that head-on collision falls mix the new mixed solution of formation, new mixed solution enter respectively lower floor oxygen-starved area 16,16 ' in, organism in the new mixed solution spreads rapidly and is adsorbed by microorganism, can effectively reduce this regional dissolved oxygen drops to below the 0.5mg/L oxygen dissolving value, can also be for anti-nitration reaction provide carbon source, thus remove ammonia nitrogen in the middle of the dirty waste water better.Then, mixed solution continue to flow enter respectively gas lift aerobic zone 14,14 ', this zone be provided with the micro-hole aerator group 4,4 of continuous air feed ', for system provides oxygen and circulation power.In the present embodiment, the air demand of micro-hole aerator group is 1.2m
3/ min, under the brute force of gas lift current stirs, the liquid stream that enters the gas lift aerobic zone fast and the bubble that the micro-hole aerator group provides contact and disperse, follow gas lift when promoting mixed solution flow point in stream and the ditch not along the vertical end top water-level of the inclination training wall 3,3 of gas lift aerobic zone one side ' rise to inclination training wall kinetic energy be converted into gravitional force fully, jump over inclination training wall top descend rapidly the aerobic zone 13,13 that enters the upper strata respectively ', it is main in the one's respective area that to remove with COD, BOD be that the carbon source of sign is contaminants associated carries out nitrated and poly-phosphorus reaction simultaneously.After finishing hydraulic retention and aerobic biochemical reaction under the aerobic zone action of turbulent flow, the partially mixed liquid of two aerobic zones enter respectively be positioned at solid-liquid displacement zone 12,12 ' the funneling solid-liquid separator 2 of bar shaped, 2 ', mixed solution is entered in the bar shaped funnel by bar shaped funnel bottom opening, raising speed is slowed down, form heavy mud, the heavy mud that has entered before having replaced under stream effect forward, enters in the ditch body mixed solution then; Then, follow-up mixed solution enter again bar shaped funnel 2,2 ' in, go round and begin again, heavy mud is alternately changed, after solid-liquid displacement zone realizes mud-water separation, clear water respectively by receive mill weir 27,27 ' be enriched to water leg 23,23 ' in the middle of, then, by water shoot 82,82 ' outflow system.Aerobic zone 13,13 ' most of mixed solution respectively Yan Zhugoudao enter lower floor oxygen-starved area 16,16 ' in, mixed solution mixes with the former water that newly advances again, realizes the circulation go round and begin again.
Be provided with water conservancy diversion paddle board 9 among the present invention, it mainly acts on is to from two relative top-layer channel aerobic zones 14,14 ' carry out assignment of traffic in the lower floor oxygen-starved area through head-on collision, the mixed solution that falls.The two transition oxygen-starved areas 11 that are communicated with, 11 ' become the two-way mixed solution cycling stream zone of confluxing in opposite directions, as shown in Figure 2, when water conservancy diversion paddle board 9 rotation rolls oblique position to the upper edge to horizontal baffle 5, the mixed solution main flow is imported in horizontal baffle 5 ' lateral sulcus body, the active sludge that makes this side oxygen-starved area 16 ' inner fluid speed suddenly increase deposition in the drive zone flows, the oxygen-starved area 16 inner fluid speeds reduction of horizontal baffle 5 sides meanwhile makes mixed solution have enough residence time to make biology have time enough to carry out the work of denitrogenation in this zone, causes this zone to produce sludgd deposition simultaneously; When water conservancy diversion paddle board 9 rotation to the upper edge during to the oblique position of horizontal baffle 5 ' inclination, the mixed solution main flow is imported in the horizontal baffle 5 lateral sulcus bodies, make flow velocity rising in this side oxygen-starved area 16, thereby take away the mud of deposition, and make oxygen-starved area 16 ' inner fluid speed reduction of horizontal baffle 5 ' side make mixed solution have enough residence time to make biology have time enough to carry out the work of denitrification denitrogenation in this zone.This sewage disposal operation that utilizes water conservancy diversion paddle board 9 to distribute flow in the tridimensional circulating oxidation ditch has not only solved the not good problem of the interior denitrification effect of existing ditch body but also has solved the problem of sludgd deposition, the rotating speed of water conservancy diversion paddle board is set according to different operating modes, and to rotate the time in a week be 5 hours to the water conservancy diversion paddle board in this example.In addition, two bursts of processes that the mixed solution main flow is converged, clashed into, shunts, in fact play between mixed solution and the former water that enters, mixed solution and the mixed solution more sufficient stirring and mix, this makes the impact resistance of oxidation ditch strengthen, it is littler to former water slug effects of load to handle water outlet, and effluent characteristics is more stable.Simultaneously, in the present invention, mixed solution is realized fully stirring and the situation that circulates of mixing, compared with prior art, the present invention has saved intermittent gas supply micro-hole aerator group, only uses one group of continuous air feed micro-hole aerator group, simplifies the operation, save energy prolongs the life-span that micro-pore aeration equipment uses.
The corner of horizontal baffle 5,5 ' respectively and inclination training wall 3,3 ' be connected arrange shore pipe 83,83 ', regular outside spoil disposal, thereby control sludge age and reduce the content of phosphorus in the waste water.
Summarize above-mentioned working process, principle of work of the present invention is: form two symmetries, the lower floor oxygen-starved area, upper strata aerobic zone, solid-liquid displacement zone and the gas lift aeration zone that arrange in opposite directions and the transition oxygen-starved area that is connected as a single entity in the rectangle integrated oxidation ditch.Two groups of identical continuous air feed micro-hole aerator groups of aeration rate are arranged on the ditch bottom of the gas lift aeration zone at oxidation ditch two ends respectively and carry out aeration, form this moment by the ditch two ends respectively the gas lift plug-flow, to the ditch intermediate phase to the three-dimensional cycling stream fluidised form of molten gas mixed solution that conflux, symmetry; In the middle of oxidation ditch, owing to be provided with the water conservancy diversion pulpboard by the horizontal set of reducing motor control, under the acting in conjunction of the mixed solution cycling stream that confluxes in opposite directions and water conservancy diversion pulpboard, time by reducing motor control is periodically rotated water conservancy diversion, the flow that distributes the mixed solution that confluxes to pass through respectively two oxygen-starved areas thus, make its two oxygen-starved areas of causing oxidation ditch respectively periodically corresponding by from high to low flow and the mixed solution cycling stream of flow velocity, namely when a side is maximum flow and flow velocity, opposite side then is minimum flow and flow velocity, goes round and begins again.Thereby realize adjusting its hydraulic detention time by the flow of periodically controlling each oxygen-starved area mixed solution, to reach the optimum reacting time at the oxygen-starved area denitrification process, promote denitrification effect; Two horizontal baffle bottoms can effectively solve the heavy mud problem of oxidation ditch bottom respectively periodically by the impingement flow of big flow velocity; By stirring naturally that two-way mixed solution cycling stream confluxes in opposite directions and produces, under the prerequisite that power is not provided, promoted the complete mixing functions of oxidation ditch, make the ability of its anti-shock loading stronger.In the two-way mixed solution cycling stream zone of confluxing in opposite directions, Liu bump will produce to emerge in large numbers and resemble in opposite directions, this makes solid-liquid separator back segment water body can not form upper strata muddy water layering, therefore can save that the funneling solid-liquid separator internal cause of original bar shaped stirs that the back segment water body needs and the surface water that arranges is crossed chute, make that the solid-liquid separator structure is more succinct, separating effect better, cost is cheaper.Symmetry, the setting of two gas lift aeration zones, oxygen-starved area and aerobic zones of setting in opposite directions, the length of three-dimensional cycling stream oxidation ditch is extended, and the restriction that efficiently solves thus because of the type oxidation ditch length, aspect ratio causes the problem that single ditch scale of construction is little, the processing water yield is low and civil engineering costs is higher.
Effect of the present invention
Above-mentioned former water meets the following conditions:
BOD
5: COD 〉=1: 3; The residence time 〉=12 of former water in the three-dimensional cycling stream integrated oxidation ditch of symmetry hour; Water inlet COD 250-600mg/L; Ammonia nitrogen 25-50mg/L; Total nitrogen 30-50mg/L; Total phosphorus 2-5mg/L.
The sewage disposal result is: COD 30-48mg/L, and clearance is greater than 90% (adopting " the mensuration dichromate titration of GB11914-89COD " to measure); Ammonia nitrogen 3.5-5mg/L, clearance is greater than 90% (adopting GB7479-87 " the mensuration nessler reagent colorimetry of water quality ammonium " to measure); Total nitrogen 6-10mg/L, total clearance is greater than 85% (adopting " the mensuration alkalescence alkaline potassium per-sulfate digestion ultraviolet spectrophotometry of GB11894-89 water quality total nitrogen " to measure), total phosphorus 0.3-0.4mg/L, clearance is greater than 80% (adopting " the mensuration ammonium molybdate spectrophotometry of GB11983-89 water quality total phosphorus " to measure); Go out water suspension less than 10mg/L (adopting " the gravimetry method of GB11901-89 water quality suspended substance " to measure).
By The above results as can be seen, adopt the nitrogen removal rate of dirt of the present invention, waste water to improve more than 10% than the existing nitrogen removal rate of the gas lifting pulsation push flowing tridimensional circulating oxidation ditch of the funneling solid-liquid separator of bar shaped that adopts.
The above only is the preferred embodiments of the present invention, is not shape of the present invention and structure are done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does.
Claims (3)
1. three-dimensional in opposite directions cycling stream integrated oxidation ditch of symmetrical expression, comprise gas lift plug-flow tridimensional circulation type oxidation ditch, in its ditch body, be provided with gas lift aerobic zone, aerobic zone, solid-liquid displacement zone, transition oxygen-starved area, oxygen-starved area, be provided with the horizontal baffle that the ditch body is divided into upper and lower two-layer raceway groove in the middle and lower part of ditch body, described aerobic zone is located at top-layer channel, and lower floor's raceway groove is located in described oxygen-starved area; It is the inclination training wall of vertical headwall that horizontal baffle one end connects to its outside oblique upper extension and top, and described gas lift aerobic zone is located between inclination training wall and the ditch body headwall, and the ditch body arranges the micro-hole aerator group in gas lift aerobic zone bottom; Be the transition oxygen-starved area at the horizontal baffle the other end, solid-liquid displacement zone is located between the aerobic zone and transition oxygen-starved area of top-layer channel, the ditch body is provided with water inlet pipe, rising pipe and shore pipe, it is characterized in that the three-dimensional in opposite directions cycling stream integrated oxidation ditch of described symmetrical expression is to be communicated with rectangle integrated oxidation ditch that in opposite directions symmetrically arranged another gas lift plug-flow tridimensional circulation type oxidation ditch constitute with identical with its structure by both walls butt joint, transition oxygen-starved area by a described gas lift plug-flow tridimensional circulation type oxidation ditch; Central authorities at described rectangle integrated oxidation ditch, between the two symmetrical horizontal baffles and the position that is lower than two horizontal baffles arranges the twin shaft reverser, an end that connects a horizontal rotating shaft along the horizontal described twin shaft reverser both sides of rectangle integrated oxidation ditch respectively, on the described horizontal rotating shaft fixedly the suit cross section be ∫ shape, the centre is provided with the bar shaped water conservancy diversion pulpboard of axis hole, the other end of horizontal rotating shaft is supported on the rectangle integrated oxidation ditch side wall, the fixedly connected vertical rotating shaft that is driven by reducing motor in the input aperture at twin shaft reverser top, reducing motor is fixedly mounted on rectangle integrated oxidation ditch top.
2. the three-dimensional in opposite directions cycling stream integrated oxidation ditch of symmetrical expression according to claim 1, it is characterized in that the solid-liquid separator that described solid-liquid displacement zone adopts is the funneling solid-liquid separator of bar shaped, comprise the settling section of crowding around solid-liquid displacement zone that is vertically connected between described rectangle integrated oxidation ditch both walls, two vertical headwalls of disengaging zone and settling region, be positioned at settling section and replace assembly with vertical headwall some receipts mill weirs arranged side by side connected vertically and the heavy mud of being located at the settling region, described vertical headwall comprises influent side headwall and water outlet side headwall, be provided with the bar shaped water leg that is vertically connected between rectangle integrated oxidation ditch both walls in water outlet side headwall outer upper, described some receipts mill weirs arranged side by side are located between influent side headwall and the water outlet side headwall, and are communicated with water leg by the corresponding receipts mill weir water outlet that arranges on the water outlet side headwall; Described heavy mud is set between the influent side headwall of corresponding settling region and water outlet side headwall replaces assembly, this assembly is the bar shaped funnel group that the bar shaped funnel vertical fixing by a plurality of connections arranged side by side forms between influent side headwall and water outlet side headwall.
3. the three-dimensional in opposite directions cycling stream integrated oxidation ditch of symmetrical expression according to claim 1 and 2 is characterized in that arranging in described horizontal baffle bottom the vertical training wall section that a plurality of and described rectangle integrated oxidation ditch both walls and horizontal baffle are fixedlyed connected.
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| CN102134124B (en) * | 2011-04-24 | 2013-05-01 | 江苏一环集团有限公司 | Integrated oxidation ditch |
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Effective date of registration: 20190401 Address after: 300110 Tianjin Nankai District Yellow River Road 519 17-104 Patentee after: Qingchi Water Environment Management Technology Development (Tianjin) Co.,Ltd. Address before: 300071 Southwest Village, Nankai University, Nankai District, Tianjin 36-1-103 Patentee before: Ju Wenzhong |
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