A kind of ozone and activated carbon BAF
Technical field
The utility model relates to a kind of BAF, relates in particular to a kind of ozone and activated carbon BAF, belongs to environment protection and water-treatment technology field.
Background technology
In the whole process that crude oil is collected and processed, oil field extracted water is come out by exploitation from the stratum with crude oil, polluted by crude oil, make and contain a large amount of organism in the recovered water and carry many suspended solidss, and dissolved various salts and the gas in the stratum in the oil reservoir of High Temperature High Pressure, make oil field produced water constituent more complicated, and the various chemical agents that add in the crude oil transmission process also make the recovered water pollution level increase.Along with the continuous strictness of sewage drainage standard, more and more higher to the emission request of materials such as chemical oxygen demand (COD) in the sewage (COD), nitrogen, phosphorus, removal and the denitrogenation dephosphorizing of chemical oxygen demand (COD) in the industrial sewage (COD) are faced with huge challenge.Traditional processing mode often needs ozonation system and BAF series connection are formed the reaction of high order pond, and this just certainly will increase expense and the energy consumption of initial cost, and makes management comparatively complicated.
BAF and sewage treatment process thereof are a kind of high-efficiency appliance and technology of sewage disposal.BAF generally is made of the filter material layer of pond body, aerating apparatus and attached biological film (microorganism), in pond body bottom aerating apparatus is installed, be the filter material layer of piling up on aerating apparatus top, the current filter material layer of flowing through from top to bottom needs aeration in water treatment procedure.BAF collection bio-oxidation and hold back the suspended solids one has been saved the post precipitation pond, has volumetric loading, hydraulic load is big, and hydraulic detention time is short, and required initial cost is few, and effluent quality is good, and operation energy consumption is low, the characteristics that working cost is few.
But also there are problems in BAF of the prior art: the filtrate needs in the BAF often clean, if scavenging period is short, then is difficult for forming effective microbial film, thereby influences the working efficiency of BAF; In addition, under the too high situation of organic concentration of water inlet, can cause bacterium to breed in a large number, stop up filtrate, if back flushing is untimely or not thorough, is easy to cause filtrate to harden, thereby influences treatment effect; And the BAF technology is limited in one's ability to the removal that contains pollutent in the hardly degraded organic substance sewage, and this problem is the principal element of restriction BAF technical development.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of ozone and activated carbon BAF.This BAF combines the BAF of ozone, prior art with gac, can carry out advanced treatment to the oil field extracted water of difficult for biological degradation.
For reaching above-mentioned purpose, the utility model provides a kind of ozone and activated carbon BAF, it is characterized in that this BAF comprises pond body, back with water inlet line, ejector, ozonizer, carbon leaching material layer, water outlet pipeline, back flushing water outlet pipeline, water outlet weir plate, filter, filter plate, back flushing admission line, back flushing back with water inlet line, distributing water room;
Wherein, the inside of described pond body is provided with described filter plate, and is provided with described filter in this filter plate;
Described filter plate and lower space form described distributing water room;
Described carbon leaching material layer is located at the top of described filter plate;
Described back with water inlet line is connected with described distributing water room, and is provided with described ejector in this back with water inlet line, and described ozonizer is connected with described ejector;
Described back flushing admission line is connected with described distributing water room respectively with described back flushing back with water inlet line;
Described water outlet pipeline, described back flushing water outlet pipeline and described water outlet weir plate are located at the top of described carbon leaching material layer.
In above-mentioned ozone and activated carbon BAF, preferably, described carbon leaching material layer is for being the carbon leaching material layer that the activated carbon granule of 3mm is formed by particle diameter.
In above-mentioned ozone and activated carbon BAF, preferably, the thickness of described carbon leaching material layer is the 50-60% of described pond height degree.
In above-mentioned ozone and activated carbon BAF, preferably, the thickness of described carbon leaching material layer is 3.0-4.0m.
It is the chief component of BAF that the utility model adopts the carbon leaching material layer.On the one hand, in the activated carbon granule surface attachment of described carbon leaching material layer microorganism is arranged, and the constantly breeding and increasing of these microorganisms, these microorganisms can be nutrition source with the organism in the sewage, thereby reduce organic content in the sewage.On the other hand, described carbon leaching material layer has to hold back with adsorption to particle in the sewage is purified water quality, and microbial activities can prolong gac work-ing life.In addition, microorganism is to the degraded of pollutent, reduce the absorption load of carbon leaching material layer, prolonged the replacement cycle of carbon leaching material layer, reduced the regeneration of activated carbon frequency, improve the treatment effect of pollutent, reduce processing cost, adsorb its particular mechanism of afterwards degrading earlier and make the residence time of pollutent and the different value of the residence time of sewage, under equal residence time condition, the pollutent residence time is longer, and treatment effect is better.
In above-mentioned ozone and activated carbon BAF, preferably, the height of described distributing water room is the 15-20% of described pond height degree.Described distributing water room is the water inlet buffer area, and water inlet and back flushing water inlet all need be passed through this distributing water room.
In above-mentioned ozone and activated carbon BAF, preferably, described filter is to have following filter to water jet.Described filter is last filter to water spray, has simultaneously down to spraying function, and it is during down to water spray, and the water impact filter plate can effectively stop the mud between filter and filter plate to be piled up.And, do not have the slough between described filter and described filter plate.
In above-mentioned ozone and activated carbon BAF, preferably, described filter plate is provided with a plurality of filters.Described filter can be regulated and control according to practical situation by persons skilled in the art in the quantity that described filter plate arranges.
In above-mentioned ozone and activated carbon BAF, preferably, described pond body is open type pond body.
Ozone and activated carbon BAF of the present utility model is volumetric loading 2.0-4.0kgCOD/ (m
3Carbon leaching material layer d), hydraulic load 2.0-3.0m
3/ (m
2H) BAF.
The utility model can be intake by automatic controlling system, the valve of the valve of water outlet pipeline and back flushing water inlet, air inlet, water outlet pipeline, realizes working order and and the back flushing state of above-mentioned ozone and activated carbon BAF.Described automatic control system can be computer control system.
During working order, the ozone that ozone and activated carbon BAF of the present utility model produces sewage that back with water inlet line enters and ozonizer is crossed ejector and is mixed the back and flow into distributing water room, upwards enter the carbon leaching material layer through filter plate and filter, by ozone sewage is carried out ozone oxidation, improve its biodegradability, oxygen in the gas of the oxygen that decompose to produce by ozone and ozonize provides dissolved oxygen for the microbial growth in the carbon leaching material layer again, need not to arrange separately aerating system, and under the Degradation of the adsorption of carbon leaching material layer and microorganism, carry out sewage disposal, sewage after the processing is discharged by the water outlet pipeline, the suspended substance that the water outlet weir plate is held back and part biological film fully contact with water body under gas stirring, form the class active sludge.
During the back flushing state, employing water dashes, gas dashes and air water carries out back flushing towards the mode of carrying out successively to ozone and activated carbon BAF of the present utility model, make backwashing water respectively, the pressurized air of back flushing is from the back flushing back with water inlet line, the back flushing admission line enters distributing water room, upwards enter the carbon leaching material layer through filter plate and filter, the suspended substance of holding back on the carbon leaching material layer is washed out by water and/or gas, flow through and discharge from back flushing water outlet pipeline behind the carbon leaching material layer, the suspended substance that the water outlet weir plate is held back and part biological film fully contact with water body under gas stirring, form the class active sludge, the weir plate of water outlet is simultaneously also held back the activated carbon granule because of floating of back flushing, and back flushing finishes the back system and can put into operation again.In described backwash process, gas dashes the developing result that makes the filter tank and reaches best, and gas has changed the cloth gaseity of distributing water room when dashing with air water back washing, has increased the gas distribution area to guarantee backwash effect.
Ozone and activated carbon BAF of the present utility model adopts the upward flow mode to move, and is implemented in the device and simultaneously sewage is carried out ozone oxidation, charcoal absorption and biodegradable function.Ozone and activated carbon BAF of the present utility model adopts ozone that sewage is carried out oxide treatment, improve Biodegradability of Wastewater, oxygen in the oxygen that the ozone decomposition produces and the gas of ozonize provides dissolved oxygen for the microorganism in the carbon leaching material layer, improve ozone utilization rate, and need not to arrange separately aerating system; When adopting in the carbon leaching material layer absorption sewage organic pollutant, can adsorb the ozone that destruction is not utilized fully, need not to arrange the ozone layer destroying system; Adopt the microorganism in the carbon leaching material layer that pollutants in sewage is degraded, alleviate the processing load of carbon leaching material layer, prolong gac work-ing life, the carbon leaching material layer provides the bond area bigger than ordinary filter for microorganism simultaneously.Be difficult to biodegradable problem by adopting ozone and activated carbon BAF of the present utility model can solve the high density oil field extracted water effectively.
Description of drawings
Fig. 1 is the ozone and activated carbon BAF synoptic diagram of embodiment 1.
The primary clustering nomenclature:
Pond body 1 back with water inlet line 2 ejectors 3 ozonizers 4 carbon leaching material layers 5 water outlet pipeline 6 back flushing water outlet pipelines 7 water outlet weir plates 8 filters 9 filter plates 10 back flushing admission lines 11 back flushing back with water inlet line 12 distributing water room 13
Embodiment
In order better to understand the utility model, further illustrate content of the present utility model below in conjunction with embodiment, but content of the present utility model not only is confined to the following examples.
Embodiment
Present embodiment provides a kind of ozone and activated carbon BAF, as shown in Figure 1, this BAF comprises pond body 1, back with water inlet line 2, ejector 3, ozonizer 4, carbon leaching material layer 5, water outlet pipeline 6, back flushing water outlet pipeline 7, water outlet weir plate 8, filter 9, filter plate 10, back flushing admission line 11, back flushing back with water inlet line 12, distributing water room 13;
Wherein, pond body 1 is the concrete basin of open type, and its inside is provided with filter plate 10, and is provided with under filter 9 from a plurality of tools to water jet in this filter plate;
Described filter plate 10 forms described distributing water room 13 with lower space, and the height of described distributing water room is 0.8m.;
Described carbon leaching material layer 5 is located at the top of described filter plate 10, and described carbon leaching material layer 5 is the carbon leaching material layer of being made up of the activated carbon granule of particle diameter 3mm 5, and the thickness of described carbon leaching material layer 5 is 3.0-4.0m;
Described back with water inlet line 2 is connected with described distributing water room 13, and is provided with described ejector 3 in this back with water inlet line 2, and described ozonizer 4 is connected with described ejector 3;
Described back flushing admission line 11, described back flushing back with water inlet line 12 are connected with described distributing water room 13 respectively;
Described water outlet pipeline 6, described back flushing water outlet pipeline 7 and described water outlet weir plate 8 are located at the top of described carbon leaching material layer 5.
The ozone and activated carbon BAF of present embodiment is volumetric loading 2.0-4.0kgCOD/ (m
3Carbon leaching material layer d), hydraulic load 2.0-3.0m
3/ (m
2H) BAF.
During working order, the ozone and activated carbon BAF of present embodiment makes the ozone that sewage that back with water inlet line 2 enters and ozonizer 4 produce, and (cumulative volume with the sewage handled is benchmark, ozone concn is 10-30mg/L) mix back inflow distributing water room 12 through ejector 3, upwards enter carbon leaching material layer 5 through filter plate 10 and filter 9, pass through ozone oxidation, sewage disposal is carried out in charcoal absorption and biological degradation, sewage after the processing is discharged by water outlet pipeline 6, the suspended substance that water outlet weir plate 8 is held back and part biological film fully contact with water body under gas stirring, form the class active sludge.
During the back flushing state, employing water dashes, gas dashes and air water carries out back flushing towards the mode of carrying out successively to the ozone and activated carbon BAF of present embodiment, make backwashing water respectively, the pressurized air of back flushing is from back flushing back with water inlet line 12, back flushing admission line 11 enters distributing water room, upwards enter carbon leaching material layer 5 through filter plate 10 and filter 9, the suspended substance of holding back on the carbon leaching material layer 5 is washed out by water and/or gas, flow through carbon leaching material layer 5 back from 7 discharges of back flushing water outlet pipeline, the suspended substance that water outlet weir plate 8 is held back and part biological film fully contact with water body under gas stirring, form the class active sludge, the activated carbon granule that the weir plate of water outlet simultaneously 8 is also held back because of floating of back flushing, back flushing finish the back system and can put into operation again.
Test case
The ozone and activated carbon BAF that this test case adopts embodiment to provide is carried out sewage disposal to certain oil production waste water in oil field.The COD of this oil production waste water in oil field water inlet is 216mg/L, and petroleum-type is 30mg/L, and flooding velocity is 1m
3/ h, dwell time of sewage are 3h, and the ozone concn that ozonizer produces is 20mg/L (cumulative volume with the sewage handled is benchmark), and, in the activated carbon granule surface attachment of carbon leaching material layer high-performance bio degraded bacterial classification is arranged.Detection method: the mensuration that adopts GB 11914-89 hydrochemistry oxygen requirement: dichromate titration is measured COD; Adopt the mensuration of GB/T16488-1996 water quality petroleum-type and vegetable and animals oils: infrared spectrophotometry is measured petroleum-type.Inlet and outlet water water quality is as shown in table 1 below.
Table 1
Detect index |
Water inlet |
Water outlet |
COD?mg/L |
216.0 |
42.0 |
Petroleum-type mg/L |
30.0 |
2.1 |
As shown in Table 1, after sewage disposal in 3 hours, water outlet COD is 42mg/L, and petroleum-type is 2.1mg/L.Therefore, by adopting the ozone and activated carbon BAF of embodiment, the COD of this oil production waste water in oil field and petroleum content are effectively reduced, solved oil field high density oil extraction waste water and be difficult to biodegradable problem.