CN103466751A - Coarse graining oil separation apparatus for processing oil-containing wastewater - Google Patents
Coarse graining oil separation apparatus for processing oil-containing wastewater Download PDFInfo
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Abstract
The invention belongs to the sewage processing field, and relates to a coarse graining oil separation apparatus for processing oil-containing wastewater. The apparatus realizes oil separation in a gravity-coarse graining-gravity three stage combination mode. The apparatus comprises a primary oil separation pool, a coarse graining pool, a secondary oil separation pool and a waterpower backwashing unit, and the above pools are vertically arranged; bamboo charcoal or modified bamboo charcoal is used as a coarse graining filler; parts of outlet water of the coarse graining pool returns to the water inlet end of the coarse graining pool to improve the coarse graining effect; and the increase of the water head loss of a coarse graining filler layer in the oil removal process induces siphon to realize automatic waterpower backwashing. Compared with apparatuses in the prior art, the apparatus has the advantages of good processing effect on the oil-containing wastewater, small occupied area, and simple management and maintenance, and is suitable for the oil separation of restaurant wastewater of places comprising the dining room, the scenic spot and the like.
Description
Technical field
The invention belongs to the process field of sewage, especially relate to a kind of oil-isolating device of processing oily(waste)water using bamboo charcoal as the coarse filler.
Background technology
The a large amount of oily(waste)water of the annual generation of catering trade, oil concentration can reach 400～600mg/L, more than even reaching 1200mg/L.Oils in waste water belongs to refractory organic, when being greater than 30～50mg/L, its concentration can affect the normal operation of biological sewage treatment, and can affect the recovery of its oxygen concn in the entered environment water body, make water quality deterioration, so oily(waste)water should carry out oil removal treatment before discharge.
In food and drink waste water, but the existence form of oil be take oil slick and finely divided oil as main, and oil in water emulsion and dissolving oil content are less.The method of oil removing at present mainly comprises Physical (gravity separation, mechanical separation and centrifugation), physico-chemical processes (absorption method, coalescence, supersonic method), chemical method (salting-out process, coacervation, acidization) and biological process (activated sludge process, biomembrance process etc.).And but coalescence is good to the treatment effect of oil slick, finely divided oil and part oil in water emulsion in conjunction with gravity separation, device is simple, and without adding other medicaments, and running cost is cheap, has therefore become the Main Means of food and drink waste water oil removing.
The technical essential that coalescence is processed oily(waste)water in conjunction with gravity separation mainly comprises the selection of coarse filler and the type selecting of device.The coarse filler can be divided into the large class of natural crystal and artificial synthetic organic materials (as urethane, polyethylene etc.) two by type; wherein the latter's coarse effect is better; but because it belongs to hardly degraded organic substance, so the discarded improper meeting of aftertreatment of filler causes environmental pollution.The type selecting of device is the key that affects deoiling effect, the coarse reactor be take the dump packing formula as main at present, in order to improve oil-water separation, oily(waste)water often adopts flow lifting type in the flow direction of coarse section, but back flushing (backwashing water need be contrary with the flow direction of oily(waste)water in the oil removing process) the meeting compacting packing layer of streaming falls in backwash process, thereby be unfavorable for the abundant regeneration of filler, backwash effect is poor; The back flushing of coarse filler adopts mode regularly to carry out more, if the influent quality fluctuation more may cause back flushing not in time, affects effluent quality.In addition, general coalescence is larger in conjunction with gravity separation oil removal plant floor space, therefore is not suitable for using in the area of shortage of land resource.
Summary of the invention
Purpose of the present invention is exactly that the oil and water separation bygranulation device backwash effect that above-mentioned prior art exists is poor in order to overcome, back flushing not in time when larger, coalescence, synthetic coarse filler large in conjunction with gravity separation oil removal plant floor space can produce the defect such as environmental pollution and a kind of coarse oil-isolating device of processing oily(waste)water is provided for variation water quality; this device adopts bamboo charcoal as the coarse filler; automatically open back flushing according to the filler pollution level; during back flushing, the filler turgidity is high; developing result is good, thereby and adopts integrated design to reduce floor space.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of coarse oil-isolating device of processing oily(waste)water; mode by gravity-coarse-three sections combinations of gravity realizes the purpose of oil removal; device brings out siphon by the increase of coarse packing layer head loss in the oil removing process and realizes the auto hydraulic back flushing; this device comprises first oil trap, coarse pond, secondary oil trap and hydraulic reverse flushing unit; described first oil trap, coarse pond and secondary oil trap are vertical layout; first oil trap is positioned at top; the coarse pond is positioned at bottom; the secondary oil trap is positioned at middle part; wherein
The feed-water end of first oil trap is provided with into the water distribution trough, water side is provided with the effluent trough as the coarse inlet flume, the pond face is provided with oil exit pipe in pond, in pond, oil exit pipe is connected with oil exit pipe outside pond, the other end access set oil drum of oil exit pipe outside pond, wherein in pond, oil exit pipe, for the perforation oil exit pipe, is provided with shore pipe in pond at the bottom of pond, in pond, shore pipe is connected with shore pipe outside pond, and wherein in pond, shore pipe is perforated sludge discharge pipe;
The bottom in coarse pond is laid with water distributing pipe, and top is provided with guide layer, and inside is provided with the coarse packing layer;
One side at the top of secondary oil trap is provided with the water purification drainage tray, and the both sides of bottom are communicated with guide layer by check valve, and the pond face is provided with oil exit pipe in pond, is provided with the siphon destructive bucket in pond;
Hydraulic reverse is rinsed unit and is comprised inverted U-shaped siphon pipe, siphon destructing tube, auxiliary siphon tube and back flushing drainage tray; described siphonal middle part is communicated with the coarse inlet flume; a siphonal bottom is communicated with water distributing pipe; another bottom extends in the back flushing drainage tray; one end of described siphon destructing tube is connected with siphonal top; the other end extends in the siphon destructive bucket of secondary oil trap inside; one end of described auxiliary siphon tube is communicated with siphonal top, and the other end hangs down and extends in the back flushing drainage tray.
The bottom land height of described coarse inlet flume, lower than the notch height of the water purification drainage tray of secondary oil trap, enters water distribution pipeline to avoid air.
Described first oil trap adopts parallel flow intercepter, also be provided with base slope in described first oil trap, the first perforation water dispensing board, upflow tube, overflow weir and the first oil baffle, described base slope is located at the bottom of first oil trap, the gradient is to the water outlet direction, described the first perforation water dispensing board is located at into the rear side of water distribution trough, described upflow tube is located at the position of the top of first oil trap higher than overflow weir, described overflow weir be located in first oil trap with first bore a hole water dispensing board relative a side, form the coarse inlet flume between the pool wall of described overflow weir and first oil trap, described the first oil baffle is located at overflow weir the place ahead, and the first oil baffle is higher than overflow weir.
Also be provided with two supporting plates in described coarse pond; described coarse packing layer is between two supporting plates; and the height between two supporting plates is greater than the height of 1.2 times of coarse packing layers; the abundant expansion of coarse packing layer while being beneficial to back flushing, described supporting plate is perforated retainer.
Described secondary oil trap can adopt the design of parallel flow intercepter, also can in pond, increase swash plate to improve oil removal efficiency, also be provided with the second perforation water dispensing board in described secondary oil trap, the second oil baffle, the siphon destructive bucket, upflow tube and return line, described the second perforation water dispensing board is located at the outside of feed-water end one-way cock, described the second oil baffle is located at the place ahead of water purification drainage tray, described siphon destructing tube is positioned at the siphon destructive bucket, described upflow tube is located at the position of the top of secondary oil trap higher than water purification drainage tray crest of weir, one end of described return line is located at the position of the top of the inboard one-way cock of the second perforation water dispensing board near liquid level, the other end of return line connects the coarse inlet flume, by the effluent recycling in part coarse pond to improve the coarse effect.
Described check valve is provided with two altogether, lays respectively at the both sides of secondary oil trap bottom, and wherein the check valve near the second perforation water dispensing board is the check valve that flows to the secondary oil trap, and the check valve of opposite side is the check valve that flows to the coarse pond.
The pool wall top of described secondary oil trap is provided with the ventilating pit be communicated with atmosphere, and the pool wall lower end of secondary oil trap is provided with access opening, and the bottom of secondary oil trap is provided with blow-down pipe, and the secondary oil trap supports by spike.
Described inverted U-shaped siphon pipe comprises siphon upcast and the siphon downtake that upper end is connected, the upper position of described siphon upcast is communicated with the coarse inlet flume, the lower end of siphon upcast is communicated with water distributing pipe, the lower end of described siphon downtake extends in the back flushing drainage tray, and the below of siphon downtake is provided with the back washing strength setter of taper, the middle part of described auxiliary siphon tube is communicated with by an extraction pipe with the upper end of siphon downtake, be connected with the pressure washpipe between the upper end of the middle and upper part of described auxiliary siphon tube and siphon upcast, this pressure washpipe is provided with valve.
The upper end of described siphon upcast and siphon downtake is higher than the liquid level of secondary oil trap, and, lower than the height of the overflow weir in first oil trap, the caliber of described auxiliary siphon tube is less than the caliber of siphon upcast or siphon downtake.
Filler in described coarse packing layer is bamboo charcoal or, through the bamboo charcoal of surface modification, described surface modification refers to the nitric acid dousing modification, and the particle diameter of described bamboo charcoal is 10～40 orders.
Oily(waste)water by lift pump and water inlet pipe from the water inlet distribution trough enters first oil trap; but oil slick and parts of fine dispersed oil float up to the water surface and form the oil slick layer; oil droplet in the oil slick layer is discharged to outside pond in oil exit pipe by oil exit pipe in pond; and flow in the oil-collecting bucket; suspended particulate is discharged by shore pipe outside shore pipe, pond in pond at the bottom of being settled down to pond; water after preliminary treatment flows into the coarse inlet flume through overflow weir, and enters in the coarse pond by siphon upcast and water distributing pipe.In the coarse pond, oily(waste)water upwards flows, in water, oil droplet and bamboo-carbon filler collide and are gathered into gradually large particle mutually, and due to the density of bamboo charcoal lower than water, therefore under the effect of ascending current bamboo-carbon filler make progress compacting support in above supporting plate, the oily(waste)water of processing through coarse is by the guide layer at top, coarse pond, one-way cock and the second perforation water dispensing board flow into the secondary oil trap, and at the feed-water end of secondary oil trap, water after the part coarse is back to the coarse inlet flume by return line, and along with water inlet enters the coarse pond again, thereby improve the effect of coarse.Through coarse, process, finely divided oil and part oil in water emulsion in waste water are gathered into large oil droplet, and further are removed in the secondary oil trap, and purifying waste water after processing discharged by water purification drainage tray and the rising pipe of secondary oil trap end.
Along with the carrying out of oil removing process, the surface of bamboo-carbon filler and space are stopped up by oil droplet and particulate matter gradually, and the head loss of coarse section increases, and cause the water level in the coarse inlet flume to rise, and the water level of the siphon upcast be communicated with it also increases.When water level reaches the mouth of pipe height of auxiliary siphon tube, current overflow and flow into the back flushing drainage tray from auxiliary siphon tube, produce negative pressure and extract the air at siphon upcast top in the effect lower pumping pipe of waterpower suction, now in the siphon upcast, water level accelerates to raise, and siphon downtake bottom is drawn to certain altitude by the water in the back flushing drainage tray.When in the siphon upcast, water level is crossed whereabouts, pipe top, in pipe, vacuum tightness sharply increases, and forms serial siphon while acquiring a certain degree.The closed check valve of secondary oil trap feed-water end under the effect of hydraulic pressure now, the water side check valve is opened, and the water in the secondary oil trap flows into the coarse pond downwards by the guide layer of bottom, and the coarse filler is carried out to back flushing.Under the flushing of descent waterflow, bamboo-carbon filler can fully expand and then be beneficial to the raising of developing result, wash-down water is discharged in the back flushing drainage tray by siphon upcast, siphon downtake, flow through backwashing water overflow weir discharging by the back flushing water shoot of the backwashing water in the back flushing drainage tray.In backwash process, the water inlet in coarse pond is also discharged with siphon upcast, siphon downtake, and, after secondary oil trap median water level descends, the mouth of pipe road of return line goes out the water surface, and backflow stops.Along with the carrying out of back flushing, secondary oil trap median water level reduces gradually, and when being reduced to the quarrel of siphon destructive bucket, siphon destructing tube starts air amount, siphon destructive, and backwash process finishes.Also can open in operational process and force the valve of washpipe to be forced back flushing.
Compared with prior art, the present invention has the following advantages and beneficial effect:
1. by the mode of gravity-coarse-three sections combinations of gravity, reducing when filler pollutes speed the removal efficiency that improves finely divided oil;
2. by the appropriate design to each Duan Chiti, take full advantage of longitudinal space, reduce floor space, use under the condition of applicable soil anxiety;
3. adopt the mode of coarse water outlet internal reflux, in the situation that do not improve the coarse bed stuffing height, improve treatment effect;
4. control the unlatching of back flushing with the pollution level of coarse packing layer, the back flushing of filler more in time, effectively;
5. backwash process is realized by the waterpower syphonic effect, and valve quantity is few, without Artificial Control and, without the numerical control device, cost is low;
6. adopt bamboo charcoal or modification bamboo charcoal as the coarse filler, coarse is effective, environmentally safe after filler is discarded;
7. in the oil removing process, the coarse section adopts flow lifting type, more is conducive to oily gathering and separates; Adopt and fall streaming in back flushing process, utilize the little characteristics of bamboo charcoal density ratio water, packing layer fully expanded when rinsing and be conducive to improve the effect of back flushing, and can shorten backwashing time and intensity.
The accompanying drawing explanation
Fig. 1 is the pond body decomposing schematic representation that device of the present invention adds man-hour;
The two dimensional structure schematic diagram that Fig. 2 is device of the present invention;
The A-A cross-sectional view that Fig. 3 is Fig. 2;
The B-B cross-sectional view that Fig. 4 is Fig. 2.
In figure: 1 is lift pump, 2 is water inlet pipe, 3 is the water inlet distribution trough, 4 is the first perforation water dispensing board, 5 is oil droplet, 6 is suspended particulate, 7 is base slope, 8 is upflow tube, 9 is oil exit pipe in pond, 10 is the oil slick layer, 11 is shore pipe in pond, 12 is the first oil baffle, 13 is overflow weir, 14 is the coarse inlet flume, 15 is water distributing pipe, 16 is supporting plate, 17 is the coarse packing layer, 18 is flange, 19 is check valve, 20 is the second oil baffle, 21 is the second perforation water dispensing board, 22 is the water purification drainage tray, 23 is ventilating pit, 24 is rising pipe, 25 is the siphon upcast, 26 is the siphon downtake, 27 is siphon destructing tube, 28 is return line, 29 is the siphon destructive bucket, 30 is auxiliary siphon tube, 31 is extraction pipe, 32 is blow-down pipe, 33 is spike, 34 is the back flushing drainage tray, 35 is the back washing strength setter, 36 is the backwashing water overflow weir, 37 is the back flushing water shoot, 38 for forcing washpipe, 39 is access opening, 40 is the oil-collecting bucket, 41 is oil exit pipe outside pond, 42 is shore pipe outside pond, 43 is valve, 44 is guide layer, I is first oil trap, II is the coarse pond, III is the secondary oil trap.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of coarse oil-isolating device of processing oily(waste)water, the mode by gravity-coarse-three sections combinations of gravity realizes the purpose of oil removal, device brings out siphon by the increase of coarse packing layer head loss in the oil removing process and realizes the auto hydraulic back flushing.As shown in Figure 1; apparatus main body can adopt steel plate or PVC plate to make; in order to process and convenient transportation; the pond body is divided into to three part processing according to functional zone; can not fix and adopt nut to fix when first oil trap I and secondary oil trap III dress; the position that coarse pond II and secondary oil trap III engage adopts rubber cradle and flange 18 to be connected, with assurance, seals and is convenient to change filler.
This device concrete structure as shown in Figure 2 to 4; comprise first oil trap I, coarse pond II, secondary oil trap III and hydraulic reverse flushing unit; first oil trap I, coarse pond II and secondary oil trap III are vertical layout; first oil trap I is positioned at top; coarse pond II is positioned at bottom, and secondary oil trap III is positioned at middle part.
Wherein, first oil trap I adopts parallel flow intercepter, the feed-water end of first oil trap I is provided with into water distribution trough 2, and water side is provided with the effluent trough as coarse inlet flume 14, and the pond face is provided with oil exit pipe 9 in pond, in pond, oil exit pipe 9 is connected with oil exit pipe outside pond 41, the other end access set oil drum 40 of oil exit pipe 41 outside pond, wherein in pond, oil exit pipe 9, for the perforation oil exit pipe, is provided with shore pipe 11 in pond at the bottom of pond, in pond, shore pipe 11 is connected with shore pipe outside pond 42, and wherein in pond, shore pipe 11 is perforated sludge discharge pipe, also be provided with base slope 7 in first oil trap I, the first perforation water dispensing board 4, upflow tube 8, overflow weir 13 and the first oil baffle 12, base slope 7 is located at the bottom of first oil trap I, the gradient is to the water outlet direction, the first perforation water dispensing board 4 is located at into the rear side of water distribution trough 2, upflow tube 8 is located at the position of the top of first oil trap I higher than overflow weir 13, overflow weir 13 be located in first oil trap I with first bore a hole water dispensing board 4 relative a side, form coarse inlet flume 14 between the pool wall of overflow weir 13 and first oil trap I, the first oil baffle 12 is located at overflow weir 13 the place aheads, and the first oil baffle 12 is higher than overflow weir 13.
II bottom, coarse pond is laid with water distributing pipe 15; top is provided with guide layer 44; inside is provided with coarse packing layer 17; also be provided with two supporting plates 16 in the II of coarse pond; coarse packing layer 17 is between two supporting plates 16; and the height between two supporting plates 16 is greater than the height of 1.2 times of coarse packing layers 17, the abundant expansion of coarse packing layer 17 while being beneficial to back flushing, supporting plate 16 is perforated retainer.
Secondary oil trap III can adopt the design of parallel flow intercepter, also can in pond, increase swash plate to improve oil removal efficiency, one side at the top of secondary oil trap III is provided with water purification drainage tray 22, and the both sides of bottom are communicated with guide layer 44 by check valve 19, and the pond face is provided with oil exit pipe 9 in pond, also be provided with the second perforation water dispensing board 21 in secondary oil trap III, the second oil baffle 20, siphon destructive bucket 29, upflow tube 8 and return line 28, the second perforation water dispensing board 21 is located at the outside of feed-water end one-way cock 19, the second oil baffle 20 is located at the place ahead of water purification drainage tray 22, siphon destructing tube 27 is positioned at siphon destructive bucket 29, upflow tube 8 is located at the position of the top of secondary oil trap III higher than water purification drainage tray 22 crests of weir, one end of return line 28 is located at the position of the top of the inboard one-way cock 19 of the second perforation water dispensing board 21 near liquid level, the other end of return line 28 connects coarse inlet flume 14, its effect is to improve the coarse effect by the effluent recycling of part coarse pond II.The pool wall top of secondary oil trap III is provided with the ventilating pit 23 be communicated with atmosphere, and avoiding in the back flushing timer forming negative pressure affects operating performance.The pool wall lower end of secondary oil trap III is provided with access opening 39, and the bottom of secondary oil trap III is provided with blow-down pipe 32, and secondary oil trap III supports by spike 33.Check valve 19 is provided with two altogether, lays respectively at the both sides of secondary oil trap III bottom, and wherein the check valve 19 near the second perforation water dispensing board 21 is the check valve that flows to secondary oil trap III, and the check valve 19 of opposite side is for flowing to the check valve of coarse pond II.
The bottom land height of coarse inlet flume 14, lower than the notch height of the water purification drainage tray 22 of secondary oil trap III, enters water distribution pipeline to avoid air.
Hydraulic reverse is rinsed unit and is comprised inverted U-shaped siphon pipe, siphon destructing tube 27, auxiliary siphon tube 30 and back flushing drainage tray 34; siphonal middle part is communicated with coarse inlet flume 14; a siphonal bottom is communicated with water distributing pipe 15; another bottom extends in back flushing drainage tray 34; one end of siphon destructing tube 27 is connected with siphonal top; the other end extends in secondary oil trap III; one end of auxiliary siphon tube 30 is communicated with siphonal top, and the other end hangs down and extends in back flushing drainage tray 34.
Inverted U-shaped siphon pipe comprises the connected siphon upcast in upper end 25 and siphon downtake 26, the upper position of siphon upcast 25 is communicated with coarse inlet flume 14, the lower end of siphon upcast 25 is communicated with water distributing pipe 15, the lower end of siphon downtake 26 extends in back flushing drainage tray 34, and the below of siphon downtake 26 is provided with the back washing strength setter 35 of taper, the middle part of auxiliary siphon tube 30 is communicated with by an extraction pipe 31 with the upper end of siphon downtake 26, be connected with between the upper end of the middle and upper part of auxiliary siphon tube 30 and siphon upcast 25 and force washpipe 38, this pressure washpipe 38 is provided with valve 43.
The upper end of siphon upcast 25 and siphon downtake 26 is higher than the liquid level of secondary oil trap III, and, lower than the height of the overflow weir 13 in first oil trap I, the caliber of auxiliary siphon tube 30 is less than the caliber of siphon upcast 25 or siphon downtake 26.
Fillers in coarse packing layer 17 are bamboo charcoal or, through the bamboo charcoal of surface modification, surface modification refers to the nitric acid dousing modification, and the particle diameter of bamboo charcoal is 10～40 orders.
Oily(waste)water by lift pump 1 and water inlet pipe 2 from water inlet distribution trough 3 enters first oil trap I; but oil slick and parts of fine dispersed oil float up to the water surface and form oil slick layer 10; oil droplet 5 in oil slick layer 10 is discharged to outside pond in oil exit pipe 41 by oil exit pipe in pond 9; and flow in oil-collecting bucket 40; suspended particulate 6 is discharged by shore pipe outside shore pipe 11, pond in pond 42 at the bottom of being settled down to pond; water after preliminary treatment flows into coarse inlet flume 14 through overflow weir 13, and enters in the II of coarse pond by siphon upcast 25 and water distributing pipe 15.In the II of coarse pond, oily(waste)water upwards flows, in water, oil droplet and bamboo-carbon filler collide and are gathered into gradually large particle mutually, and due to the density of bamboo charcoal lower than water, therefore under the effect of ascending current bamboo-carbon filler make progress compacting support in above supporting plate 16, the oily(waste)water of processing through coarse is by the guide layer 44 at II top, coarse pond, one-way cock 19 and the second perforation water dispensing board 21 flow into secondary oil trap III, and at the feed-water end of secondary oil trap III, water after the part coarse is back to coarse inlet flume 14 by return line 28, and along with water inlet enters coarse pond II again, thereby improve the effect of coarse.Through coarse, process, finely divided oil and part oil in water emulsion in waste water are gathered into large oil droplet, and further are removed in secondary oil trap III, and purifying waste water after processing discharged by water purification drainage tray 22 and the rising pipe 24 of secondary oil trap III end.
Along with the carrying out of oil removing process, the surface of bamboo-carbon filler and space are stopped up by oil droplet and particulate matter gradually, and the head loss of coarse section increases, and cause the water level in coarse inlet flume 14 to rise, and the water level of the siphon upcast 25 be communicated with it also increases.When water level reaches the mouth of pipe height of auxiliary siphon tube 30, current overflow and flow into back flushing drainage tray 34 from auxiliary siphon tube 30, in the interior generation negative pressure of effect lower pumping pipe 31 of waterpower suction and extract the air at siphon upcast 25 tops, now the interior water level of siphon upcast 25 accelerates to raise, and siphon downtake 26 bottoms are drawn to certain altitude by the water in back flushing drainage tray 34.When the interior water level of siphon upcast 25 is crossed whereabouts, pipe top, in pipe, vacuum tightness sharply increases, and forms serial siphon while acquiring a certain degree.Now under the effect of hydraulic pressure, the check valve 19 of secondary oil trap III feed-water end is closed, and water side check valve 19 is opened, and the water in secondary oil trap III flows into coarse pond II downwards by the guide layer 44 of bottom, and the coarse filler is carried out to back flushing.Under the flushing of descent waterflow, bamboo-carbon filler can fully expand and then be beneficial to the raising of developing result, wash-down water is discharged in back flushing drainage tray 34 by siphon upcast 25, siphon downtake 26, and the backwashing water in back flushing drainage tray 34 is flowed through backwashing water overflow weir 36 also by 37 discharges of back flushing water shoot.In backwash process, the water inlet of coarse pond II is also discharged with siphon upcast 25, siphon downtake 26, and, after secondary oil trap III median water level descends, the mouth of pipe road of return line 28 goes out the water surface, and backflow stops.Along with the carrying out of back flushing, secondary oil trap III median water level reduces gradually, and when being reduced to the quarrel of siphon destructive bucket 29, siphon destructing tube 27 starts air amount, siphon destructive, and backwash process finishes.Also can open in operational process and force the valve 43 of washpipe 38 to be forced back flushing.
The device of employing embodiment 1 removes oil test to the simulation food and drink waste water of artificial preparation.
Test adopts the mode of water inlet continuously, and the compound method of simulated wastewater is; Add the mixed oil of 0.4g/L and the lard of 0.2g/L in clear water, and add 0.005% Sodium dodecylbenzene sulfonate, after the rotating speed stirring 15min with stirring rake with 1200rpm, pour in the water bucket and prepare against use.Simulated wastewater in water inlet bucket all the time the speed with 1000rpm stir to avoid oil droplet to assemble and floating.
The main design parameters of oil-isolating device is as table 1.
Table 1 oil-isolating device main design parameters
Operation scheme is as follows:
The oil removing stage.Oily(waste)water enters first oil trap I by lift pump 1 and water inlet pipe 2; but the gravity removal is carried out to major part oil slick and suspended particulate in this pond; water outlet flows into coarse inlet flume 14 through overflow weir 13; and flow into coarse pond II by siphon upcast 25 and water distributing pipe 15; finely divided oil in water the coarse section gradually coalescence become macrobead, and flow into secondary oil trap III by check valve 19 and the second perforation water dispensing board 21.In order to strengthen the coarse effect, the coarse water outlet is back to coarse water inlet flute profile by return line 28 and lift pump entering secondary oil trap III fore portion, from forming internal reflux.Oil droplet through coarse further separates in secondary oil trap III, and the water after processing is discharged through water purification drainage tray 22.Regularly opening outside pond 43 pairs of oil slick of valve and the sediment on shore pipe 42 outside oil exit pipe 41 and pond in operational process is got rid of.
The back flushing stage.Carrying out along with the oil removing process, 6 pairs of coarse layers of oil droplet 5 and suspended particulate produce to stop up head loss are increased, water level in coarse inlet flume 14 rises gradually, water level in the siphon upcast 25 simultaneously be communicated with it also raises gradually, when water level reaches the mouth of pipe height of auxiliary siphon tube 30, current overflow and flow into back flushing drainage tray 34 from auxiliary siphon tube 30, the interior generation negative pressure of effect lower pumping pipe 31 of aspirating in waterpower is also aspirated the air at siphon upcast 25 tops, now the interior water level of siphon upcast 25 accelerates to raise, and siphon downtake 26 bottoms are drawn to certain altitude by the water in back flushing drainage tray 34, when the interior water level of siphon upcast 25 is crossed whereabouts, pipe top, in pipe, vacuum tightness sharply increases, form serial siphon while acquiring a certain degree.Now under the effect of hydraulic pressure, secondary oil trap III feed-water end check valve 19 is closed; water side check valve 19 is opened; water in pond flows into coarse pond II downwards by the guide layer 44 of bottom; the coarse filler is carried out to back flushing, and wash-down water flows in siphon upcast 25 and discharges by water distributing pipe 15.In backwash process, the coarse water inlet is also discharged with siphon upcast 25 and siphon downtake 26, and, after secondary oil trap III median water level descends, the mouth of pipe of return line surfaces, and backflow stops.Along with the carrying out of back flushing, secondary oil trap III median water level descends, and when being reduced to the quarrel of siphon destructive bucket 29, siphon destructing tube 27 starts air amount, siphon destructive, and backwash process finishes.Also can open in operational process and force the valve 43 of washpipe 38 to be forced back flushing.
Adopt Infrared Oil Determination Instrument to be measured the concentration of oil in the device water outlet, within the oil removing cycle, the oil concentration of water outlet is all lower than 30mg/L, and deoiling effect reaches 95%.And the stirring intensity that the present embodiment adopts when the configuration simulated wastewater is higher, and in simulated wastewater, the degree of scatter of oil droplet, higher than actual food and drink waste water, illustrates that this device has good oil removal effect to oily(waste)water.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. a coarse oil-isolating device of processing oily(waste)water; it is characterized in that; this device comprises first oil trap (I), coarse pond (II), secondary oil trap (III) and hydraulic reverse flushing unit; described first oil trap (I), coarse pond (II) and secondary oil trap (III) are vertical layout; first oil trap (I) is positioned at top, and coarse pond (II) is positioned at bottom, and secondary oil trap (III) is positioned at middle part; wherein
The feed-water end of first oil trap (I) is provided with into water distribution trough (2), and water side is provided with the effluent trough as coarse inlet flume (14), and the pond face is provided with oil exit pipe in pond (9), is provided with shore pipe in pond (11) at the bottom of pond;
The bottom in coarse pond (II) is laid with water distributing pipe (15), and top is provided with guide layer (44), and inside is provided with coarse packing layer (17);
The top of secondary oil trap (III) is provided with water purification drainage tray (22), and the both sides of bottom are communicated with guide layer (44) by check valve (19), and the pond face is provided with oil exit pipe in pond (9), is provided with siphon destructive bucket (27) in pond;
Hydraulic reverse is rinsed unit and is comprised inverted U-shaped siphon pipe, siphon destructing tube (27), auxiliary siphon tube (30) and back flushing drainage tray (34), described siphonal middle part is communicated with coarse inlet flume (14), a siphonal bottom is communicated with water distributing pipe (15), another bottom extends in back flushing drainage tray (34), one end of described siphon destructing tube (27) is connected with siphonal top, the other end extends in the inner siphon destructive bucket (27) of secondary oil trap (III), one end of described auxiliary siphon tube (30) is communicated with siphonal top, the other end hangs down and extends in back flushing drainage tray (34),
After oily(waste)water enters first oil trap (I), but oil slick and parts of fine dispersed oil are discharged by oil exit pipe (9) in pond, suspended particulate is discharged by shore pipe (11) in pond at the bottom of being settled down to pond, water after preliminary treatment flows into coarse inlet flume (14), and entered in coarse pond (II) by bottom by siphon pipe and water distributing pipe (15), the oily(waste)water of processing through coarse flows into secondary oil trap (III) by the guide layer (44) at top, coarse pond (II), and further oil removing in secondary oil trap (III), purify waste water and discharge from water purification drainage tray (22);
In the oil removing process; when the filler in coarse pond (II) is stopped up by particulate matter and oil droplet; water level in coarse inlet flume (14) rises; and bring out siphon and cause the water in coarse pond (II) to continuously flow in back flushing drainage tray (34) by siphon pipe; water in secondary oil trap (III) flows into downwards in coarse pond (II) simultaneously; the coarse filler is carried out to back flushing; liquid level in secondary oil trap (III) is down to the quarrel of siphon destructive bucket (29) when following; siphon destructive, backwash process finishes.
2. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1, is characterized in that, the bottom land height of described coarse inlet flume (14) is lower than the notch height of the water purification drainage tray (22) of secondary oil trap (III).
3. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1, it is characterized in that, also be provided with base slope (7) in described first oil trap (I), the first perforation water dispensing board (4), upflow tube (8), overflow weir (13) and the first oil baffle (12), described base slope (7) is located at the bottom of first oil trap (I), described the first perforation water dispensing board (4) is located at into the rear side of water distribution trough (2), described upflow tube (8) is located at the position of the top of first oil trap (I) higher than overflow weir (13), described overflow weir (13) be located in first oil trap (I) with first bore a hole water dispensing board (4) relative a side, form coarse inlet flume (14) between the pool wall of described overflow weir (13) and first oil trap (I), described the first oil baffle (12) is located at overflow weir (13) the place ahead, and the first oil baffle (12) is higher than overflow weir (13).
4. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1; it is characterized in that; also be provided with two supporting plates (16) in described coarse pond (II); described coarse packing layer (17) is positioned between two supporting plates (16); and the height between two supporting plates (16) is greater than the height of 1.2 times of coarse packing layers (17), described supporting plate (16) is perforated retainer.
5. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1, it is characterized in that, also be provided with the second perforation water dispensing board (21) in described secondary oil trap (III), the second oil baffle (20), siphon destructive bucket (29), upflow tube (8) and return line (28), described the second perforation water dispensing board (21) is located at the outside of feed-water end one-way cock (19), described the second oil baffle (20) is located at the place ahead of water purification drainage tray (22), described siphon destructing tube (27) is positioned at siphon destructive bucket (29), described upflow tube (8) is located at the position of the top of secondary oil trap (III) higher than water purification drainage tray (22) crest of weir, one end of described return line (28) is located at the position of the top of the second inboard one-way cock of perforation water dispensing board (21) (19) near liquid level, the other end of return line (28) connects coarse inlet flume (14).
6. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1; it is characterized in that; described check valve (19) is provided with two altogether; lay respectively at the both sides of secondary oil trap (III) bottom; wherein the check valve (19) near the second perforation water dispensing board (21) is the check valve that flows to secondary oil trap (III), and the check valve of opposite side (19) is for flowing to the check valve of coarse pond (II).
7. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1; it is characterized in that; the pool wall top of described secondary oil trap (III) is provided with the ventilating pit (23) be communicated with atmosphere; the pool wall lower end of secondary oil trap (III) is provided with access opening (39), and the bottom of secondary oil trap (III) is provided with blow-down pipe (32).
8. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1, it is characterized in that, described inverted U-shaped siphon pipe comprises the connected siphon upcast (25) in upper end and siphon downtake (26), the upper position of described siphon upcast (25) is communicated with coarse inlet flume (14), the lower end of siphon upcast (25) is communicated with water distributing pipe (15), the lower end of described siphon downtake (26) extends in back flushing drainage tray (34), and the below of siphon downtake (26) is provided with the back washing strength setter (35) of taper, the middle part of described auxiliary siphon tube (30) is communicated with by an extraction pipe (31) with the upper end of siphon downtake (26), be connected with between the upper end of the middle and upper part of described auxiliary siphon tube (30) and siphon upcast (25) and force washpipe (38), this pressure washpipe (38) is provided with valve (43).
9. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 8; it is characterized in that; the upper end of described siphon upcast (25) and siphon downtake (26) is higher than the liquid level of secondary oil trap (III); and, lower than the height of the overflow weir (13) in first oil trap (I), the caliber of described auxiliary siphon tube (30) is less than the caliber of siphon upcast (25) or siphon downtake (26).
10. a kind of coarse oil-isolating device of processing oily(waste)water according to claim 1; it is characterized in that; filler in described coarse packing layer (17) is bamboo charcoal or through the bamboo charcoal of surface modification; described surface modification refers to the nitric acid dousing modification, and the particle diameter of described bamboo charcoal is 10～40 orders.
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| CN201310349481.2A CN103466751B (en) | 2013-08-12 | 2013-08-12 | Coarse graining oil separation apparatus for processing oil-containing wastewater |
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| CN201310349481.2A CN103466751B (en) | 2013-08-12 | 2013-08-12 | Coarse graining oil separation apparatus for processing oil-containing wastewater |
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| CN103466751B (en) | 2014-12-10 |
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