CN205313314U - Coking waste water treatment system - Google Patents
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- CN205313314U CN205313314U CN201520943929.8U CN201520943929U CN205313314U CN 205313314 U CN205313314 U CN 205313314U CN 201520943929 U CN201520943929 U CN 201520943929U CN 205313314 U CN205313314 U CN 205313314U
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Abstract
The utility model discloses a coking waste water treatment system, this system is including gas ability electrolytic flocculation device, at least one many first catalytic oxidation devices and at least one biochemical device of setting gradually. The utility model has the advantages of: among the coking wastewater organic matter composition complicated, and contain the difficult biodegradable organic matter of higher concentration, can not make it the degradation through biochemical technology merely to cause out water COD to exceed standard, contain great volume biotoxicity material among the coking wastewater, this type of material is biodegradable neither, can cause the suppression to the microorganism on the contrary, influences the normal treatment effect of microorganism, except that organic pollutant, still contain high -concentration ammonia nitrogen and total nitrogen among the coking wastewater, normal operating also can exert an influence to biological treatment technology.
Description
Technical field
This utility model relates to a kind of coking wastewater processing system, belongs to field of environment engineering.
Background technology
Coking chemical waste water is that raw coal high-temperature retorting, gas purification and chemical products reclaim a kind of poisonous and harmful of process generation, the high concentration hard-degraded organic waste waters such as refining, mainly contains the pollutant such as phenolic compound, aliphatic compound, heterocyclic compound, polycyclic aromatic hydrocarbon, ammonia nitrogen, sulfide, cyanide, rhodanide. Before this, Treatment of Coking Effluent is mainly made up of techniques such as oil removing, dephenolize, ammonia still process, biochemistry, to remove majority of organic pollutants and ammonia nitrogen in waste water. Now, along with the enforcement of " coking chemistry emission of industrial pollutants standard " (GB16171-2012 replaces GB16171-1996), to COD in coking chemical waste watercr、NH3The removal of the pollutant such as-N, T-N, cyanide, polycyclic aromatic hydrocarbon, benzo (a) pyrene proposes tightened up requirement.
Coking chemical waste water process up to standard is the difficult problem generally acknowledged in the industry, not yet has a set of effective standard technology so far. The process of being processed to is divided into " pre-treatment, biological treatment, advanced treating " three process sections, describes domestic current treatment technology present situation and level is as follows:
(1) pre-treatment: the facilities such as coking chemical waste water pre-treatment in waste water station includes gravity oil removal, homogenizing is all measured, oil removal by air bubbling. Molysite deposition method need to be adopted in pre-treatment to remove when in waste water containing high concentration cyanide. Air supporting generally adopts the recessed air supporting of three-phase vortex blender or air-dissolving air-float.
(2) biological treatment: biological treatment includes the functions such as denitrification, nitrated, COD degradation, decyanation, and process form includes A/O, A/A/O, O/A/O etc. Biological reinforced treatment technology adds specially good effect strain, adds enzyme, installs special biologic packing material or adopts membrane Bio-reactor Technology (MBR) etc.
(3) advanced treating: be most commonly that and add special effect agent, Advanced oxidation technologies and membrane separation technique. Special effect agent includes one or more functions such as coagulation, flocculation, oxidation, absorption. Advanced oxidation technologies is most commonly seen with Fenton and catalytic ozonation. Membrane technology is generally adopted nanofiltration or reverse osmosis. Additionally, advanced treating also has the electrochemical techniques such as employing electricity flocculation, electrolytic oxidation.
The processing stage of above three each stage effluent quality approximately as:
Water quality situation processing stage that table 1 coking chemical waste water being each
| Pre-treatment | Biological treatment | Advanced treating | |
| CODcr(mg/L) | 2500～4000 | 180～250 | 80～150 |
| NH3-N(mg/L) | 150～250 | 5～10 | 5～10 |
| T-N(mg/L) | 300～350 | 150～200 | 150～200 |
In biological treatment section, FAQs includes nitrification function instability and produces large number of biological foam:
(1) containing phenol, cyanide, rhodanide and other large number of biological toxicants in coking chemical waste water, nitrobacteria can be produced inhibitory action when certain concentration by such material, causes biological treatment water outlet NH3The fluctuation of-N index is bigger; And because nitrobacteria growth rate is relatively slow, once be suppressed, recover longer to the time needed for normal function.
(2) a large amount of foam is produced during coking chemical waste water biochemical treatment (particularly activated sludge process), it is necessary to adopt defoamer or industry water to carry out froth breaking. When adopting above-mentioned froth breaking measure, the former somewhat expensive; The latter can cause biological treatment water yield significantly to raise (elevation amplitude reaches as high as 100%), although water outlet pollutant levels reduce but total amount clearance is not high.
In advanced treatment process section, each technology Problems existing is as shown in the table:
Table 2 coking wastewater deep treatment technology has problems
According to " coking chemistry emission of industrial pollutants standard " (GB16171-2012), Treatment of Coking Effluent to direct major pollutants discharged limit value is: CODcr< 80mg/L, NH3-N < 10mg/L, T-N < 20mg/L. According to current Treatment of Coking Effluent practical situation, process only by enhanced biological, or rely on merely special effect agent, chemical oxidation even depth to process means, be all difficult to meet the emission request of new standard. Additionally, the ton Jiao's displacement required in standard reduces, it is meant that often takes at present adds the means that the dilution of a large amount of industry waters makes Treatment of Coking Effluent up to standard will be no longer feasible, and can be increasingly considered from now on coking chemical waste water will be carried out reuse even zero-emission.
Current domestic Treatment of Coking Effluent is generally difficult to the analysis of causes up to standard as follows:
(1) in coking chemical waste water, organic components is complicated and containing higher concentration refractory organic, simple by biochemical process can not so as to degrade, thus causing water outlet COD to exceed standard;
(2) containing relatively large bio-toxicity material in coking chemical waste water, such material is not only not biodegradable, microorganism can be caused suppression on the contrary, affects microorganism normal process effect;
(3) outside removal organic polluter, possibly together with ammonia nitrogen in high density and total nitrogen in coking chemical waste water, impact can also be produced on biological treatment is properly functioning.
Utility model content
This utility model purpose is to provide a kind of coking wastewater processing system, to solve the problems referred to above existing in prior art.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of coking wastewater processing system, it includes the gas energy flocculation plant, at least one multiple catalyzing oxidation unit and at least one biochemical device that set gradually.
Preferably, described gas energy flocculation plant includes intake pump, three-phase vortex blender one, air compressor machine, three-phase vortex blender two, three-phase vortex blender three, three-phase vortex blender four, flco separating tank and Slag Scraping Device, described three-phase vortex blender one is connected with intake pump, described three-phase vortex blender two is connected with three-phase vortex blender one, described three-phase vortex blender three is connected with three-phase vortex blender two, described phase vortex mixer four is connected with three-phase vortex blender three, the dividing plate of vertical direction and the perforation water collection sheet of horizontal direction it is provided with in described flco separating tank, described dividing plate will be divided into flco growth district and flco Disengagement zone in flco separating tank, described perforation water collection sheet is arranged at the clear water zone of bottom, flco Disengagement zone, described three-phase vortex blender four is connected with flco growth district, described Slag Scraping Device is arranged at the oral area of flco separating tank.
This gas energy flocculation plant adopts three-phase vortex blender as core component, a step complete agent molecule stretch put forward effect, coagulation-flocculation stirring (contaminant trapping), flco are formed, bubble nucleus generates and ultralight cavitation flco is formed in steps.Thus utilizing accurately a small amount of chemical agent, fully trap water pollutant; Concurrently form the hollow flco that proportion is extremely light, shift to cell body surface and be stripped off.
With tradition air flotation technology, gas energy flocculation technique essential difference is in that bubble is different with the contact form of flco: the latter adopts simply " bubble contacts attachment with flco ", and bubble is prone to and flco generation desorption; And the former adopts " flco air bubble growth technology " bubble internal at flco and periphery generates nucleus growth, both become organic one.
Preferably, described three-phase vortex blender two is also connected with an air compressor machine.
Preferably, described gas energy flocculation plant also includes slag chute and scum silica frost delivery pump.
Preferably, described multiple catalyzing oxidation unit includes multiple catalyzing oxidation reaction groove, air-diffuser and catalyst support filter plate it is sequentially provided with from down to up in described multiple catalyzing oxidation reaction groove, described catalyst support filter plate is vertically provided with two pieces of minus plates and one piece of positive plate, described positive plate is arranged between two pieces of described minus plates, the oral area of multiple catalyzing oxidation reaction groove is provided with cloth tank, one end of described cloth tank is connected with intake pump, the other end of cloth tank is connected with a reflux inlet and an outlet valve simultaneously, described reflux inlet and outlet valve are controlled by a circulating pump.
Multiple catalyzing oxidation technology is the research in conjunction with high-level oxidation technology and senior catalysis technique, electronic control technology and corresponding solid catalyst, the comprehensive water treatment device adopting ti-based coating electrode, fixing composite catalyst and desorption technology to develop. Its operation principle describes as follows: under normal temperature and pressure conditions, between specific coatings electrode, electromagnetic field is formed by DC source, and form polynary electrode effect by the solid composite catalyst filled between electrode, oxygen, catalyst synergism under, efficiently and rapidly promote the generation of hydroxyl radical free radical (OH). OH has extremely strong oxidability, utilizes the oxidizing electrode current potential that it is high, it is easy to the high cloud density point of attack organic molecule, without selectively broken for the organic pollution of high concentration difficult for biological degradation ring chain rupture, is oxidized to CO2, H2O or simple Organic substance.
Preferably, described biochemical device includes: anoxic pond, Aerobic Pond, aerator, nitrification liquid reflux pump, micropore aeration pipe, sedimentation tank and mud scraper, described Aerobic Pond is arranged between anoxic pond and sedimentation tank, and be connected with anoxic pond, described Aerobic Pond is built with biologic packing material, and described micropore aeration pipe is arranged at the bottom of Aerobic Pond, and described aerator is connected with micropore aeration pipe, described nitrated reflux pump is communicated between Aerobic Pond and anoxic pond, is provided with mud scraper in described sedimentation tank.
Therefore, this utility model compared with prior art, has the advantage that
(1) adopt gas energy flocculation technique as coking chemical waste water pre-treatment, the three-phase vortex blender stream three-phase hybrid technology that gas can flocculate exclusive can maximally utilise chemical agent, the fully tiny pollution granule of seizure and colloid, coking turbidity of wastewater clearance is high, can the follow-up multiple catalyzing oxidation of effective guarantee and biochemical influent quality requirement.
(2) multiple catalyzing oxidation technology can produce strong oxidizer hydroxyl radical free radical [OH] with relatively low energy consumption, compares other high-level oxidation technology, and reaction condition gentleness, course of reaction are without using any chemical agent and not producing mud or concentrated solution.
(3) adopt gas to flocculate and multiple catalyzing oxidation carries out coking chemical waste water biochemistry pre-treatment, can effectively reduce wastewater biological toxicity, reduce biochemical treatment load and improve wastewater biodegradability, make subsequent biochemical process and become simple efficient.
(4) adopting multiple catalyzing oxidation as after biochemical pre-treatment, biochemical device Aeration tank surfactant foam amount is compared the direct Treatment of Wastewater in Coking of biochemical device and to be greatly decreased and be even substantially free of foam, it is not necessary to take any froth breaking measure.
(5) type approval test shows, adopts this technology path that coking chemical waste water is processed, water outlet CODcr、NH3-N and T-N is respectively smaller than 80mg/L, 10mg/L and 20mg/L, meets the requirement of " coking chemistry emission of industrial pollutants standard " (GB16171-2012).
Accompanying drawing explanation
By reading detailed description non-limiting example made with reference to the following drawings, other features, objects and advantages of the present utility model will become more apparent upon:
Fig. 1 is process route chart of the present utility model;
Fig. 2 is the structural representation of the three-phase vortex blender in this utility model;
Fig. 3 is the structural representation of multiple catalyzing oxidation unit in this utility model;
Fig. 4 is the structural representation of the biochemical device in this utility model;
In figure: 101, gas energy device intake pump; 102, air compressor machine; 103, three-phase vortex blender one; 104, three-phase vortex blender two; 105, three-phase vortex blender three; 106, three-phase vortex blender four; 107, flco growth district; 108, dividing plate; 109, flco separating tank; 110, perforation water collection sheet; 111, gas energy device Slag Scraping Device; 112, slag chute; 113, scum silica frost delivery pump; 201; Oxidation trough intake pump; 202, multiple catalyzing oxidation reaction groove; 203, air-diffuser; 204, circulating pump; 205, catalyst support filter plate; 206, composite catalyst; 207, minus plate; 208, positive plate; 209, cloth tank; 210, DC source; 211, reflux inlet; 212, outlet valve; 301, anoxic pond; 302, Aerobic Pond; 303, aerator; 304, nitrification liquid reflux pump; 305, biologic packing material; 306, micropore aeration pipe; 307, sedimentation tank; 308, sedimentation basin mud scraper; 309, sludge pump.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described in detail. Following example will assist in those skilled in the art and are further appreciated by this utility model, but do not limit this utility model in any form. It should be pointed out that, to those skilled in the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement. These broadly fall into protection domain of the present utility model.
A kind of coking wastewater processing system, it includes the gas energy flocculation plant, at least one multiple catalyzing oxidation unit and at least one biochemical device that set gradually, in present embodiment, the quantity of multiple catalyzing oxidation unit is two, and the quantity of biochemical device is also two.
The structure of gas energy flocculation plant is as shown in Figure 2, including gas energy device intake pump 101, three-phase vortex blender 1, air compressor machine 102, three-phase vortex blender 2 104, three-phase vortex blender 3 105, three-phase vortex blender 4 106, flco separating tank 109 gentle energy device Slag Scraping Device 111, three-phase vortex blender 1 is connected with gas energy device intake pump 101, three-phase vortex blender 2 104 is connected with three-phase vortex blender 1, three-phase vortex blender 3 105 is connected with three-phase vortex blender 2 104, three-phase vortex blender 4 106 is connected with three-phase vortex blender 3 105, the dividing plate 108 of vertical direction and the perforation water collection sheet 110 of horizontal direction it is provided with in flco separating tank 109, dividing plate 108 will be divided into flco growth district 107 and flco Disengagement zone in flco separating tank 109, perforation water collection sheet 110 is arranged at flco Disengagement zone, three-phase vortex blender 4 106 is connected with flco growth district 107, gas energy device Slag Scraping Device 111 is arranged at the oral area of flco separating tank 109, the waste residue that gas energy device Slag Scraping Device is scraped out is sent in slag chute 112, the bottom of slag chute 112 is connected with a scum silica frost delivery pump 113, waste residue in slag chute 112 is drained by scum silica frost delivery pump 113.Three-phase vortex blender 2 104 is also connected with air compressor machine 102.
This gas energy flocculation plant adopts three-phase vortex blender as core component, a step complete agent molecule stretch put forward effect, coagulation-flocculation stirring (contaminant trapping), flco are formed, bubble nucleus generates and ultralight cavitation flco is formed in steps. Thus utilizing accurately a small amount of chemical agent, fully trap water pollutant; Concurrently form the hollow flco that proportion is extremely light, shift to cell body surface and be stripped off.
With tradition air flotation technology, gas energy flocculation technique essential difference is in that bubble is different with the contact form of flco: the latter adopts simply " bubble contacts attachment with flco ", and bubble is prone to and flco generation desorption; And the former adopts " flco air bubble growth technology " bubble internal at flco and periphery generates nucleus growth, both become organic one.
The structure of multiple catalyzing oxidation unit includes multiple catalyzing oxidation reaction groove 202 as shown in Figure 3, air-diffuser 203 and catalyst support filter plate 205 it is sequentially provided with from down to up in multiple catalyzing oxidation reaction groove 202, catalyst support filter plate 205 is vertically provided with two pieces of minus plates 207 and one piece of positive plate 208, positive plate 208 is arranged between two pieces of minus plates 207, the oral area of multiple catalyzing oxidation reaction groove 202 is provided with cloth tank 209, one end of cloth tank 209 is connected with oxidation trough intake pump 201, the other end of cloth tank 209 is connected with a reflux inlet 211 and an outlet valve 212 simultaneously, reflux inlet 211 and outlet valve 212 are controlled by a circulating pump 204. during use, two pieces of minus plates 207 can be connected with the negative electricity of DC source 210, one piece of positive plate 208 is connected with the positive electrical of DC source 210, and composite catalyst 206 of mating formation on catalyst support filter plate 205.
Multiple catalyzing oxidation technology is the research in conjunction with high-level oxidation technology and senior catalysis technique, electronic control technology and corresponding solid catalyst, the comprehensive water treatment device adopting ti-based coating electrode, fixing composite catalyst and desorption technology to develop. Its operation principle describes as follows: under normal temperature and pressure conditions, between specific coatings electrode, electromagnetic field is formed by DC source, and form polynary electrode effect by the solid composite catalyst filled between electrode, oxygen, catalyst synergism under, efficiently and rapidly promote the generation of hydroxyl radical free radical (OH). OH has extremely strong oxidability, utilizes the oxidizing electrode current potential that it is high, it is easy to the high cloud density point of attack organic molecule, without selectively broken for the organic pollution of high concentration difficult for biological degradation ring chain rupture, is oxidized to CO2、H2O or simple Organic substance.
The structure of biochemical device is as shown in Figure 4, including: anoxic pond 301, Aerobic Pond 302, aerator 303, nitrification liquid reflux pump 304, micropore aeration pipe 306, sedimentation tank 307 and sedimentation basin mud scraper 308, Aerobic Pond 302 is arranged between anoxic pond 301 and sedimentation tank 307, and be connected with anoxic pond 301, Aerobic Pond 302 is built with biologic packing material 305, micropore aeration pipe 306 is arranged at the bottom of Aerobic Pond 302, aerator 303 is connected with micropore aeration pipe 306, nitrated reflux pump 304 is communicated between Aerobic Pond 302 and anoxic pond 301, sedimentation basin mud scraper 308 is arranged in sedimentation tank 307, sedimentation basin mud scraper 308 is connected with a sludge pump 309, the mud that sedimentation basin mud scraper 308 scrapes can be drained by sludge pump 309.
A kind of coking wastewater processing system, it includes the gas energy flocculation plant, at least one multiple catalyzing oxidation unit and at least one biochemical device that set gradually.
Preferably, described gas energy flocculation plant includes intake pump, three-phase vortex blender one, air compressor machine, three-phase vortex blender two, three-phase vortex blender four, flco separating tank and Slag Scraping Device, described three-phase vortex blender one is connected with intake pump, described three-phase vortex blender two is connected with three-phase vortex blender one, described three-phase vortex blender three is connected with three-phase vortex blender two, described three-phase vortex blender four is connected with three-phase vortex blender three, the dividing plate of vertical direction and the perforation water collection sheet of horizontal direction it is provided with in described flco separating tank, described dividing plate will be divided into flco growth district and flco Disengagement zone in flco separating tank, described perforation water collection sheet is arranged at the clear water zone of bottom, flco Disengagement zone, described three-phase vortex blender four is connected with flco growth district, described Slag Scraping Device is arranged at the oral area of flco separating tank.
This gas energy flocculation plant adopts three-phase vortex blender as core component, a step complete agent molecule stretch put forward effect, coagulation-flocculation stirring (contaminant trapping), flco are formed, bubble nucleus generates and ultralight cavitation flco is formed in steps. Thus utilizing accurately a small amount of chemical agent, fully trap water pollutant; Concurrently form the hollow flco that proportion is extremely light, shift to cell body surface and be stripped off.
With tradition air flotation technology, gas energy flocculation technique essential difference is in that bubble is different with the contact form of flco: the latter adopts simply " bubble contacts attachment with flco ", and bubble is prone to and flco generation desorption; And the former adopts " flco air bubble growth technology " bubble internal at flco and periphery generates nucleus growth, both become organic one.
Preferably, described three-phase vortex blender two is also connected with an air compressor machine.
Preferably, described gas energy flocculation plant also includes slag chute and scum silica frost delivery pump.
Preferably, described multiple catalyzing oxidation unit includes multiple catalyzing oxidation reaction groove, air-diffuser and catalyst support filter plate it is sequentially provided with from down to up in described multiple catalyzing oxidation reaction groove, described catalyst support filter plate is vertically provided with two pieces of minus plates and one piece of positive plate, described positive plate is arranged between two pieces of described minus plates, the oral area of multiple catalyzing oxidation reaction groove is provided with cloth tank, one end of described cloth tank is connected with intake pump, the other end of cloth tank is connected with a reflux inlet and an outlet valve simultaneously, described reflux inlet and outlet valve are controlled by a circulating pump.
Multiple catalyzing oxidation technology is the research in conjunction with high-level oxidation technology and senior catalysis technique, electronic control technology and corresponding solid catalyst, the comprehensive water treatment device adopting ti-based coating electrode, fixing composite catalyst and desorption technology to develop. Its operation principle describes as follows: under normal temperature and pressure conditions, between specific coatings electrode, electromagnetic field is formed by DC source, and form polynary electrode effect by the solid composite catalyst filled between electrode, oxygen, catalyst synergism under, efficiently and rapidly promote the generation of hydroxyl radical free radical (OH). OH has extremely strong oxidability, utilizes the oxidizing electrode current potential that it is high, it is easy to the high cloud density point of attack organic molecule, without selectively broken for the organic pollution of high concentration difficult for biological degradation ring chain rupture, is oxidized to CO2、H2O or simple Organic substance.
Preferably, described biochemical device includes: anoxic pond, Aerobic Pond, aerator, nitrification liquid reflux pump, micropore aeration pipe, sedimentation tank and mud scraper, described Aerobic Pond is arranged between anoxic pond and sedimentation tank, and be connected with anoxic pond, described Aerobic Pond is built with biologic packing material, and described micropore aeration pipe is arranged at the bottom of Aerobic Pond, and described aerator is connected with micropore aeration pipe, described nitrated reflux pump is communicated between Aerobic Pond and anoxic pond, is provided with mud scraper in described sedimentation tank.
A kind of coking waste water treatment method based on aforesaid coking wastewater processing system, the step of can flocculate including gas pre-treatment, the step of one-level multiple catalyzing oxidation processes, the step of one-level biochemical treatment, secondary biochemical oxidation, the step of secondary biochemical treatment.
Coking chemical waste water first removes heavy oil and oil slick through gravity oil interceptor, removes oil emulsion then through gas energy flocculation plant, reduces turbidity, subsequently into regulating reservoir equilibrium water quality and quantity.
In regulating reservoir, waste water is lifted into one-level multiple catalyzing oxidation unit through pump, utilize the strong oxidizer hydroxyl radical free radical [OH] generated in course of reaction, ketene, phenols, condensed-nuclei aromatics class, nitrogen heterocyclic ring compounds (such as quinoline, indole, pyridine, anthracene, quinone etc.) and the toxicant such as sulfide, cyanide in coking chemical waste water are aoxidized, cut down its bio-toxicity, and make hardly degraded organic substance open loop chain rupture, improve its biodegradability.
The oxidation water outlet of one-level multiple catalyzing enters one-level biochemical treatment, one-level biochemistry adopts A/O (anoxia/aerobic) technique, utilizing the assimilable carbon source in water inlet to carry out denitrification elimination total nitrogen in anoxia section, major part aldehydes matter is completely degraded conversion simultaneously; In aerobic section, the further oxidative degradation of COD (major part ketene material is completely removed), NH3-N carries out nitration reaction, and nitrification liquid is back in anoxia section.
For meeting the emission request of T-N and COD, second level multiple catalyzing oxidation technology is set and carries out coking wastewater deep treatment: hardly degraded organic substance remaining in waste water is aoxidized, is translated into biodegradable material or directly removes; The biodegradable material generated and supplementary carbon source is utilized to carry out denitrification elimination total nitrogen in succeeding level-two biochemistry A/O (anoxia/aerobic) technique. Final outflow water water quality can reach New emission standard limit value.
Certainly, if the physical and chemical index of the coking chemical waste water after a multiple catalyzing oxidation or after a biochemical treatment can reach respective standard, waste water can not be carried out follow-up multiple catalyzing oxidation or biochemical treatment.
Preferably, the pre-treatment of flocculating of described gas specifically includes following operation:
Three-phase vortex blender one, three-phase vortex blender three and three-phase vortex blender four are separately added into aluminium polychlorid coagulant, cationic high-molecular flocculant, Anionic High-molecular Flocculant, three-phase vortex blender two passes into compression air;
Three-phase blender under high pressure forms three-phase vortex blender stream, can complete medicament and contaminant particle (solid), water, gas three-phase mix.
Coking chemical waste water is inputted in three-phase vortex blender one, after making coking chemical waste water sequentially pass through the flocculation of three-phase vortex blender one, three-phase vortex blender two, three-phase vortex blender three and three-phase vortex blender four, pass into the flco growth district of flco separating tank;
The Slag Scraping Device that the scum silica frost formed in described flco growth district is arranged by groove top in flco separating tank scrapes, and is collected clean clear liquid by perforation water collection sheet and discharges, enter lower one treatment process bottom flco separating tank.
The flco gradually formed in three-phase vortex blender is solid-liquid-gas tri-state mixture under pressure states, and in flco growth district, earth pressure release is normal pressure, and the molten gas release in flco is grown up, and can be extruded by the moisture in flco; Gas and solid flco form Porous hollow form, and the while that moisture content significantly reducing, self proportion is more and more lighter, it is possible to do not float voluntarily by external force.
The Slag Scraping Device that arranged by groove top in flco separating tank of scum silica frost that flco growth district is formed scrapes to slag chute and collects, and drains into dehydration device by scum silica frost delivery pump; Arrange perforation bottom flco separating tank to catchment dividing plate, collect clean clear liquid and discharge, enter lower one treatment process.
Gas energy flocculation treatment polymeric wastewater order of addition of ingredients and chemical feeding quantity data are as shown in table 2:
Table 2 gas can flocculate order of addition of ingredients and chemical feeding quantity
Table 3 three-phase vortex blender operating pressure
| Operating pressure (MPa) | |
| Three-phase vortex blender one | 0.70 |
| Three-phase vortex blender two | 0.58 |
| Three-phase vortex blender three | 0.54 |
| Three-phase vortex blender four | 0.05 |
Gas energy flocculation treatment coking chemical waste water effect
Gas can flocculate the removal effect to coking turbidity of wastewater and colourity substantially, and meanwhile, gas can flocculate to coking waste water CODcrAlso there is certain removal: at influent CODcrAbout during 1800mg/L～2300mg/L, process water outlet CODcrAbout 1700mg/L～1950mg/L.
Additionally, the scum silica frost that gas energy flocculation treatment coking chemical waste water is formed is more closely knit, scum silica frost generation amount is about 5～6L/m3Waste water.
One-level multiple catalyzing oxidation processes specifically includes following operation:
The catalyst support filter plate of multiple catalyzing oxidation unit is mated formation catalyst;
The coking chemical waste water input cloth tank that can will flocculate through gas, controls the liquid level of described coking chemical waste water higher than stopping water inlet after catalyst surface;
By air-diffuser, the coking chemical waste water in reactive tank being carried out aeration aerating, antianode plate and minus plate carry out the transmission of electricity of positive pole and negative pole respectively simultaneously, proceed by aerated reaction;
Carry out to 15～20min until described aerated reaction, stop aeration aerating, ON cycle pump, proceed by circular response;
Carry out to 15～20min until described circular response, close circulating pump, stop the power supply of antianode plate and minus plate, whole multiple catalyzing oxidation reaction terminates, and waste water is promoted to next stage multiple catalyzing oxidation reaction by going out water pump or enters subsequent biochemical process device.
First order multiple catalyzing oxidation running parameter is as shown in table 4
Table 4
First order multiple catalyzing oxidation processes effect is as follows:
Reaction water inlet (i.e. gas can flocculate water outlet) CODcrAbout 1600mg/L～2100mg/L, one-level multiple catalyzing oxidation water outlet CODcrAbout 900mg/L～1400mg/L, clearance reaches 30%～45%.
Reaction water inlet volatile phenol concentration is 301.8mg/L, and one-level multiple catalyzing oxidation water outlet volatile phenol concentration is 127.4mg/L, and clearance reaches 57.8%.
Reaction water inlet NO3-N concentration is about 160mg/L～180mg/L, one-level multiple catalyzing oxidation water outlet NO3-N is about 105mg/L～130mg/L, and clearance reaches 25%～35%.
One-level multiple catalyzing aoxidizes the NH in coking chemical waste water3-N is without obvious removal, and often there will be reaction water outlet NH3-N concentration is higher than the situation of water inlet, and this is possibly due in catalytic oxidation process, and the nitrogen heterocyclic ring organic compound of part difficult for biological degradation there occurs decomposition reaction, produces NH3-N, causes reaction water outlet NH3-N concentration raises.
One-level biochemical treatment specifically includes following operation:
The waste water aoxidized through multiple catalyzing is carried out anoxic treatment;
After described anoxic treatment terminates, carry out Aerobic Process for Treatment;
After described Aerobic Process for Treatment terminates, carry out precipitation flocculation;
After described precipitation flocculation terminates, mud is discharged through sludge pump, and supernatant carries out next stage process.
Waste water initially enters anoxic pond and processes, and installs biologic packing material in anoxic pond, and on filler, attached microbial carries out anti-nitration reaction, utilizes the Organic substance in water inlet as the nitrate nitrogen in carbon source degraded backflow nitrification liquid. Influent waste water adds potassium dihydrogen phosphate as biological nutrition salt, add glucose denitrifying carbon source as a supplement.
Anoxic pond water outlet flows into Aerobic Pond, micropore aeration pipe is set bottom Aerobic Pond, biologic packing material is installed in pond, in pond, dissolved oxygen controls at more than 2mg/L, Organic substance in coking chemical waste water and ammonia nitrogen are degraded by Aerobic Pond microorganism, Aerobic Pond nitrification liquid is back to anoxic pond by reflux pump, and reflux ratio is～300%. Aerobic Pond adds sodium carbonate and supplements the basicity nitration reaction for ammonia nitrogen.
Aerobic Pond water outlet flows into sedimentation tank, arranges mud scraper, dosing coagulant in sedimentation tank water inlet pipe, add flocculant in sedimentation tank central reaction cylinder in sedimentation tank. Sedimentation tank supernatant flows into next stage and processes device, and sedimentation tank base sludge is discharged through sludge pump.
The technique of first order biochemical treatment and operational factor be as shown in table 5 and table 6:
Table 5 first order biochemical processing process parameter
Table 6 first order biochemical treatment operational factor
| Water inlet | Anoxic pond | Aerobic Pond | |
| pH | 6.5～7 | 7.5～8.0 | 7～7.5 |
| DO(mg/L) | - | 0.05～0.1 | 3.0～4.0 |
| ORP(mV) | -300～250 | -200～-150 | 250～300 |
The effect of one-level biochemical treatment is such as shown in chart 7
Table 7 first order biochemical treatment treatment effect
| First order biochemical treatment is intake | First order biochemical treatment water outlet | |
| CODcr(mg/L) | 950～1500 | 90～135 |
| NH3-N(mg/L) | 80～140 | 5～10 |
| T-N(mg/L) | 140～320 | 20～25 |
Two grades of multiple catalyzing oxidation processes
Owing to the collaborative biochemical treatment coking chemical waste water of one-level multiple catalyzing oxidation still can not meet COD in standardcrRequirement up to standard (< 80mg/L), therefore it is carried out the oxidation of two grades of multiple catalyzings and secondary biochemical treatment.
One-level bio-chemical effluent enters second level multiple catalyzing oxidation unit and processes, and multiple catalyzing oxidation in the second level is identical with the processing procedure of first order multiple catalyzing oxidation and operation principle.
The running parameter of two grades of multiple catalyzing oxidations is as shown in table 8.
Table 8
Second level multiple catalyzing oxidation processes effect is as follows:
Reaction water inlet (i.e. first order multiple catalyzing oxidation water outlet) CODcrAbout 90mg/L～135mg/L, second level multiple catalyzing oxidation water outlet CODcrAbout 80mg/L～100mg/L.
Secondary biochemical treatment, two grades of multiple catalyzing oxidation water outlets enter second level biochemical device and process, and the biochemical processing procedure biochemical with the first order in the second level and operation principle are identical.
The technique of secondary biochemical treatment and operational factor are distinguished as shown in Table 9 and Table 10:
Table 9 second level biochemical processing process parameter
| HRT (hydraulic detention time) | ～8h (wherein A section 4h, O section 4h) |
| Mixed liquid recycle ratio | ～200% |
| Water temperature | 25～30 DEG C |
Table 10 second level biochemical treatment operational factor
| Water inlet | Anoxic pond | Aerobic Pond | |
| pH | ～7 | ～7 | ～7 |
| DO(mg/L) | - | 0.05～0.1 | 2.0～3.0 |
Second level Biochemical Treatment is as follows:
Second level biochemical treatment water outlet CODcrIt is 52～72mg/L, meets discharge standard requirement.
In the industrial applications test of the Treatment of Coking Effluent carried out in certain company. Adopting this utility model technology path, processing the water yield continuously is 1m3/ h, water quality treatment result is as follows:
Table 11 Treatment of Coking Effluent result
In sum, it is only preferred embodiment of the present utility model, not it is used for limiting the scope that this utility model is implemented, all equalizations done according to the shape described in this utility model right, structure, feature and spirit change and modify, and all should be included in right of the present utility model.
Claims (5)
1. a coking wastewater processing system, it is characterised in that include the gas energy flocculation plant, at least one multiple catalyzing oxidation unit and at least one biochemical device that set gradually;
Described gas energy flocculation plant includes intake pump, three-phase vortex blender one, air compressor machine, three-phase vortex blender two, three-phase vortex blender three and three-phase vortex blender four, flco separating tank and Slag Scraping Device, three-phase vortex blender one is connected with intake pump, described three-phase vortex blender two is connected with three-phase vortex blender one, described three-phase vortex blender three is connected with three-phase vortex blender two, described three-phase vortex blender four is connected with three-phase vortex blender three, the dividing plate of vertical direction and the perforation water collection sheet of horizontal direction it is provided with in described flco separating tank, described dividing plate will be divided into flco growth district and flco Disengagement zone in flco separating tank, described perforation water collection sheet is arranged at the clear water zone of bottom, flco Disengagement zone, described three-phase vortex blender four is connected with flco growth district, described Slag Scraping Device is arranged at the oral area of flco separating tank.
2. coking wastewater processing system as claimed in claim 1, it is characterised in that described three-phase vortex blender two is also connected with an air compressor machine.
3. coking wastewater processing system as claimed in claim 1, it is characterised in that described gas energy flocculation plant also includes slag chute and scum silica frost delivery pump.
4. coking wastewater processing system as claimed in claim 1, it is characterized in that, described multiple catalyzing oxidation unit includes multiple catalyzing oxidation reaction groove, air-diffuser and catalyst support filter plate it is sequentially provided with from down to up in described multiple catalyzing oxidation reaction groove, described catalyst support filter plate is vertically provided with two pieces of minus plates and one piece of positive plate, described positive plate is arranged between two pieces of described minus plates, the oral area of multiple catalyzing oxidation reaction groove is provided with cloth tank, one end of described cloth tank is connected with intake pump, the other end of cloth tank is connected with a reflux inlet and an outlet valve simultaneously, described reflux inlet and outlet valve are controlled by a circulating pump.
5. coking wastewater processing system as claimed in claim 1, it is characterized in that, described biochemical device includes: anoxic pond, Aerobic Pond, aerator, nitrification liquid reflux pump, micropore aeration pipe, sedimentation tank and mud scraper, described Aerobic Pond is arranged between anoxic pond and sedimentation tank, and be connected with anoxic pond, described Aerobic Pond is built with biologic packing material, described micropore aeration pipe is arranged at the bottom of Aerobic Pond, described aerator is connected with micropore aeration pipe, described nitrification liquid reflux pump is communicated between Aerobic Pond and anoxic pond, is provided with mud scraper in described sedimentation tank.
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