The double-cycling anaerobic reaction unit
The present invention relates to a kind of anaerobic reaction device that is used for WWT.
Anaerobic reaction device is a key device in the Sewage treatment systems, and its underpart is provided with water distribution system, can waste water is assigned to the bottom of whole reactor equably and carry out the waterpower stirring; Water distribution system top is reaction zone, and reaction zone is the main place that the reaction of reactor drum mesophytization takes place, and is divided into Sludge Bed district and sludge suspension district again, and Sludge Bed district has wherein mainly concentrated most of highly active granule sludge, is organic main degraded place; The sludge suspension district then is the zone that floc sludge is concentrated.Reaction zone top is the two-stage triphase separator, in order to separate gas, water and mud granule.Derive at gas autoreactor top; The automatic landing of mud granule is settled down to the Sludge Bed of reactor bottom; Water is from the settling section water outlet.
Have the internal circulation system that has of anaerobic reaction device now, sewage gets into reaction zone through water distribution system, with the anaerobic grain sludge uniform mixing in the reaction zone.Contained most of organism is converted into biogas and in reactor drum, rises in the sewage; When biogas rises, also be promoted to the gas-liquid separator that is located at reactor head to the mixed solution in the reaction zone, the biogas that is separated is drained by the air outlet at gas-liquid separator top.Isolated muddy water mixed solution will be got back to the bottom of reaction zone along return line, and in the granule sludge and water inlet thorough mixing of bottom.Because the three-dimensional separator separates can't be very thoroughly, thus the time regular meeting " race mud " phenomenon appears, promptly unsegregated anaerobic grain sludge can be discharged reactor drum with water.As everyone knows, anaerobic reactor requires the active prilling mud high, that settling property is good of seed sludge could guarantee its normal startup and operation.And the passage of anaerobic grain sludge, the very big difficulty of bringing for the debugging and the operation at reactor drum initial stage; After the normal operation of reactor drum, muddy water mixed solution separates halfway problem and also still exists, and the direct discharging of such sewage still can pollute.
Summary of the invention
To the technical problem of above-mentioned existence, the present invention provides a kind of double-cycling anaerobic reaction unit, can separate sewage more completely and avoid the loss of prilling mud.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of double-cycling anaerobic reaction unit comprises tank body; Be disposed with water distribution zone, one-level triphase separator, secondary triphase separator, gas-liquid separator in the said tank body from the bottom to top; Also comprise water distribution system, described water distribution system comprises some cloth water units; Said cloth water unit is installed on tank body bottom water distribution zone, comprises the water inlet pipe that extends into tank interior, the valve that is used to control water inlet pipe; The part that said water inlet pipe extends into tank body is provided with some water jets; Water distribution system also comprises riser tube and return line; Said riser tube upper end communicates with the gas-liquid separator that is positioned at the tank body top, and the lower end communicates with the collection chamber of triphase separator; Said return line upper end communicates with the gas-liquid separator that is positioned at the tank body top, and the lower end communicates with water distribution zone; Said water distribution system also comprises external circulating system; Described external circulating system comprises some setting tanks that are arranged in the effluent trough; Said setting tank is connected each other, and communicates with overflow groove; Overflow groove is provided with the rising pipe of clarifying liquid being discharged tank body; Described external circulating system also comprises the outer circulation pipeline; Said outer circulation pipeline upper end communicates with the setting tank lower end, and outer circulation pipeline lower end communicates with water distribution zone.
Anaerobic reaction device with said structure has increased an external circulating system.Utilization is arranged on setting tank in the secondary triphase separator effluent trough and collects and do not separate prilling mud completely, and the water distribution zone of sending these prilling mud back to the tank body bottom.Can make that like this WWT is more thorough, can avoid the loss of prilling mud again.And anaerobism is being received when impacting, regulate the inner up-flow speed of anaerobism, keep the anaerobion amount, make anaerobic device reach the effect of steady running.
As a kind of improvement, described outer circulation pipeline is provided with valve, can be to the external circulating system independent control.
As a kind of improvement, described triphase separator comprises if layer is done a spaced flap, is used to collect the collection chamber of biogas, vertically is provided with cutoff board along the top of said flap.Make the ascending current directional stream-guidance, waterflow stabilization evenly rises, and has avoided the collision of current and the race mud phenomenon that produces.
As above-mentioned improvement improvement further, vertically be provided with baffle plate along said flap lower end.Prevent that sludge granules from being taken away by ascending current, help the deposition of mud.
As a kind of improvement, described gas-liquid separator comprises cylindrical shell, the fluid inlet that communicates with riser tube, the liquid outlet that communicates with return line, is used for the orifice plate of gas-liquid separation; Described cylinder top is provided with venting port; Liquid outlet is arranged on the cylindrical shell bottom; Be positioned in the cylindrical shell and be horizontally disposed with abacus on the fluid inlet, obliquely in the cylindrical shell be provided with some dividing plates; Said dividing plate is positioned on the orifice plate; Dividing plate is provided with the slit that supplies biogas to pass through.The dividing plate of oblique setting helps flowing back to the cylindrical shell bottom behind the steam coagulation.
As above-mentioned improvement improvement further, described dividing plate is a venetian blind type; Dividing plate is from top to bottom arranged, and the adjacent separator direction is relatively staggered.Not only have the isolating function of multilayer, separating effect is better, and the baffle design of venetian blind type, when guaranteeing that biogas passes through, helps condensing of water vapour more.
As a kind of improvement, described cloth water unit is 3, and from top to bottom arranges successively; The unitary water jet of all water distributions is arranged in same plane.Three layers of cloth water unit can be convenient the more water jet of increase, increase the injection dynamics, make that the sewage fermentation is more abundant.
As a kind of improvement, the unitary water inlet pipe of said water distribution derives 4 water inlet pipe branches, extends into 4 different zones in the same plane of water distribution zone respectively; Described gas-liquid separator is 4, and the return line that each gas-liquid separator connected communicates with 4 different zones that water inlet pipe branch marks off respectively; Be respectively arranged with valve in each water inlet pipe branch.The cloth water unit is divided into 4 parts in same plane, can be according to reaction fermentation situation different in the tank body, regional water distribution is carried out in control respectively.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 shows the structure intention for secondary triphase separator in the invention.
Fig. 3 is secondary triphase separator vertical section synoptic diagram among the present invention.
Fig. 4 is water distribution cell schematics among the present invention.
Fig. 5 is the structural representation of triphase separator flap among the present invention.
Fig. 6 is the structural representation of gas-liquid separator among the present invention.
Among the figureMark: 1 tank body; 2 water inlet pipe branches; 3 valves; 4 water jets; 5 water inlet pipes; 6 cloth water units; 7 one-level triphase separators; 8 collection chambers; 9 valves; 10 return lines; 11 riser tubes; 12 gas collection holes; 13 gas-liquid separators; 14 secondary triphase separators; 15 effluent troughs; 16 overflow grooves; 17 setting tanks; 18 rising pipes; 19 outer circulation pipelines; 20 valves; 21 water distribution zone; 22 flaps; 131 cylindrical shells; 132 fluid inlets; 133 venting ports; 134 orifice plates; 135 dividing plates; 136 liquid outlets; 221 guide faces; 222 cutoff boards; 223 baffle plates.
Below in conjunction with accompanying drawing, the present invention is done detailed explanation.
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Like Fig. 1,2, shown in 3:
The present invention includes tank body 1; Be disposed with water distribution zone 21, one-level triphase separator 7, secondary triphase separator 14, gas-liquid separator 13 in the said tank body from the bottom to top; Also comprise water distribution system, described water distribution system comprises some cloth water units 6; Said cloth water unit 6 is installed on tank body 1 bottom water distribution zone 21, comprises the water inlet pipe 5 that extends into tank body 1 inside, the valve 9 that is used to control water inlet pipe 5; The part that said water inlet pipe 5 extends into tank body 1 is provided with some water jets 4; Water distribution system also comprises riser tube 11 and return line 20; Said riser tube 11 upper ends communicate with the gas-liquid separator 13 that is positioned at tank body 1 top, lower end and the collection chamber 8 of one-level triphase separator 7 and communicating of secondary three-dimensional separator 14 collection chambers 8; Said return line 10 upper ends communicate with the gas-liquid separator 13 that is positioned at tank body 1 top, and the lower end communicates with water distribution zone 21; Said water distribution system also comprises external circulating system; Described external circulating system comprises some setting tanks 17 that are arranged in the effluent trough 15; Said setting tank 17 is connected each other, and communicates with overflow groove 16; Overflow groove 16 is provided with the rising pipe 18 of clarifying liquid being discharged tank body 1; Described external circulating system also comprises outer circulation pipeline 19; Said outer circulation pipeline 19 upper ends communicate with setting tank 17 lower ends, and outer circulation pipeline 19 lower ends communicate with water distribution zone 21.On the outer circulation pipeline valve 20 can be set.
Like Fig. 2,3, shown in 5:
Triphase separator comprises some spaced flap 22, is used to collect the collection chamber 8 of biogas, vertically is provided with cutoff board 222 along the top of said flap 22, vertically is provided with baffle plate 223 along flap 22 lower ends.The difference of one-level triphase separator 7 and secondary triphase separator 14 is: the effluent trough 15 that secondary triphase separator 14 tops are provided with overflow groove 16 and communicate with overflow groove 16.Stir the prilling mud that gets up and stopped, begin deposition by flap 22 bottoms; The bubble (staple is a biogas) that water and stirring produce rises along guide face 221, when arriving flap 22 tops, because the existence of cutoff board 222; The current on both sides can not collided; Evenly rise, through separating layer by layer, sludge granules deposition, gas are collected by collection chamber 8 through gas collection hole 12.
As shown in Figure 6:
Gas-liquid separator 13 comprises cylindrical shell 131, the fluid inlet 132 that communicates with riser tube 11, the liquid outlet 136 that communicates with return line 10, the orifice plate 134 that is used for gas-liquid separation; Described cylindrical shell 131 tops are provided with venting port 133; Liquid outlet 136 is arranged on cylindrical shell 131 bottoms; Be positioned in the cylindrical shell 131 and be horizontally disposed with abacus 134 on the fluid inlet 132, obliquely in the cylindrical shell 131 be provided with some dividing plates 135; Said dividing plate 135 is positioned on the orifice plate 134; Dividing plate 135 is provided with the slit that supplies biogas to pass through.Dividing plate 135 is a venetian blind type; Dividing plate 135 is from top to bottom arranged, and the adjacent separator direction is relatively staggered.The sewage that contains biogas gets into cylindrical shell 1 through riser tube 11 from fluid inlet 132, and the biogas band in the sewage water vapour and risen, and biogas continues to rise through the hole on the orifice plate 134, and the water vapour major part condenses on the orifice plate 134.Biogas continue to rise, and through the slit on the dividing plate 135, and residual water vapour is held back by dividing plate 135 in the biogas, condenses on the dividing plate 135, and final landing to cylindrical shell 1 bottom is back to the reaction zone 21 of tank body 1 bottom through the return line 10 that is connected with liquid outlet 136.Biogas is then discharged cylindrical shell 131 through venting port 133, is collected.
Like Fig. 1, shown in 4:
Cloth water unit 6 is preferably 3, and from top to bottom arranges successively; The water jet 4 of all cloth water units 6 is arranged in same plane.
The water inlet pipe 5 of cloth water unit 6 can also derive 4 water inlet pipe branches 2, extends into 4 different zones in the reactor drum 1 bottom water distribution zone 21 same planes respectively; Described gas-liquid separator 13 also is arranged to 4, and the return line 10 that each gas-liquid separator 13 is connected communicates with 4 different zones that water inlet pipe branch 2 marks off respectively; Be respectively arranged with valve 3 in each water inlet pipe branch 2.
The operational scheme of double-cycling anaerobic reaction unit of the present invention is following:
Sewage is sent into the water distribution zone 21 of tank body 1 bottom through the water inlet pipe 5 of water distribution system and by the water inlet pipe branch 2 that water inlet pipe 5 derives out; Water jet 4 has played the effect of stirring-up sewage through strong injection.Sewage is put the generation biochemical reaction on water distribution zone 21, organic matter degradation forms the zone that floc sludge is concentrated.Biogas, water, prilling mud rise and arrive one-level triphase separator 7, and most of prilling mud is kept off back by flap 22.Biogas and a part of water get into collection chamber 8 through gas collection hole 12 on the one hand, and get into the gas-liquid separator 13 at tank body 1 top through riser tube 11; Remaining on the other hand biogas, water, prilling mud continue rising and arrive secondary triphase separator 14.After arriving secondary triphase separator 14, prilling mud is kept off back by flap 22, and biogas and a part of water get into collection chamber 8 through gas collection hole 12, and gets into the gas-liquid separator 13 at tank body 1 top through riser tube 11; Remainder water and do not infiltrated overflow groove 16 by retaining prilling mud down, entering is arranged on the setting tank 17 in the effluent trough 15.In setting tank 17, do not deposited, and water is discharged tank body 1 through rising pipe 18 by the prilling mud under the retaining.Biogas in the gas-liquid separator 13 is discharged tank body 1 through venting port 133, and remainder water is back to water distribution zone 21 through return line 10; The prilling mud and a part of water that precipitate in the setting tank are back to water distribution zone 21 through outer circulation pipeline 19.From collection chamber 8 to gas-liquid separator 13 to water distribution zone 21 to collection chamber 8, be internal recycle of the present invention; From water distribution zone 21 approach one-level triphase separators 7 with secondary triphase separator 14 to setting tank 17 again to water distribution zone 21, be outer circulation of the present invention.
All require ss suspended solid less than 2000mg/L in the processing power processing condition of existing anaerobic device, when ss suspended solid surpasses more than the 2000mg/L, when especially ss suspended solid reaches the 10000mg/L left and right sides; Anaerobic reaction device basically can not steady running; And volumetric loading moves below 2kg.COD/m3.d basically, and when reaching 5kg.COD/m3.d, its anaerobic reaction device can not steady running; Result of use is poor simultaneously, and efficient is on the low side.
Learn through experiment:
The present invention the highest 34706 mg/L of CODcr load of intaking, minimum 16961 mg/L, average 23455 mg/L;
The highest 19820 mg/L of water inlet ss suspended solid, minimum 15000 mg/L, average 17530 mg/L.
The highest 4890 mg/L of effluent clear solution CODcr, minimum 2902 mg/L, average 4002 mg/L, clearance is the highest by 87.08%, and minimum 78.77%, average 81.9%;
The CODcr the highest 13.86KgCODcr/m3.d that loads, minimum 10.98 KgCODcr/m3.d, average 12.95 KgCODcr/m3.d;
If adopt existing anaerobic device, the anaerobism volumetric loading is all below 2 KgCODcr/ m3.d, and device can not steady running.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.