CN102531146B - Device for degrading waste water organic matters by combined type hydraulic power cavitation - Google Patents
Device for degrading waste water organic matters by combined type hydraulic power cavitation Download PDFInfo
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- CN102531146B CN102531146B CN201210040830.8A CN201210040830A CN102531146B CN 102531146 B CN102531146 B CN 102531146B CN 201210040830 A CN201210040830 A CN 201210040830A CN 102531146 B CN102531146 B CN 102531146B
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Abstract
The invention relates to a device for degrading waste water organic matters by combined type hydraulic power cavitation. The device comprises a Venturi tube component and a sieve mesh plate component which are connected in series and communicated with each other, wherein the water inlet end of the Venturi tube component is connected with a high-pressure pump waste water device; and the water outlet end of the sieve mesh plate component is connected with a water outlet pipeline. According to the device, due to the adoption of the structure, ultra-high pressure and high temperature which are similar to the condition of 'wet air oxidation' are generated and accompanied with strong shock waves and jet flows at the moment of collapsing cavitation bubbles after cavitation by utilizing the hydraulic power cavitation principle, so that part of organic matters in waste water are decomposed into CO2, H2O and inorganic oxides to degrade chemical oxygen demands (COD) and biochemical oxygen demands (BOD). The device is suitable for the pretreatment of the high-concentration organic waste water which is insusceptible to biochemical degradation, and the PH value of the waste water is not limited.
Description
Technical field
The present invention relates to the environment protection sewage process field of Hydrodynamic Cavitation Technology to organic digestion instrument in trade effluent, refer in particular to a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation.
Background technology
The industrial organic waste water of high density bio-refractory is processed, and be thorny technical barrier recent decades always, as chemical industry, medicine, black liquid, percolate etc.Therefore be also the most popular topic during environment-protective water is processed.
Various catalysed oxidation processes are many, as chemistry, UV-light, ultrasonic wave, microwave, ozone and catalytic oxidation, have again in recent years " wet type air oxidation " (WAO) method test application etc.These methods are mainly for the processing of high density bio-refractory organic waste water.Some energy consumptions are too large, and the preservation recycling problem of some catalyzer is unresolved good; Chemical process is as too large to reagent consumption (as H2O2) in Fenton method, and is not effective to most of waste water; " wet type air oxidation " (WAO) need could realize completely at 22.7MPa and more than 374.1 ℃ " wet combustion ".Some methods are relatively good, less energy-consumption, and low medicine consumption, as catalytic oxidation and ozone oxidation.
The research of the Venturi of Hydrodynamic cavitation and sieve tray mode, research is in the last thirty years few, and article is also few, and the report of case history that is applied to organic waste water is rarer.The empirical theory research that the people Zeng You such as U.S. Siva-Kumar.m and Kumar.P.S are more deep, domestic also someone writes articles report.But also all in the experimental study stage, the application of the engineering of big yield needs to be developed.The mode of Venturi realizes cavitation, in the experimental study simulation cavitation form forming, once has application at the dam foundation " cavitation corrosion " of water power dam.Domestic also have minority paper to mention " cavitation ", and the decomposition of material is even synthesized and advanced an idea, and how to realize also and not being specifically related to.
Summary of the invention
The object of the invention is to overcome above-mentioned weak point of the prior art and provide a kind of by Venturi tube assembly and tray assemblies serial combination type Hydrodynamic cavitation degrading waste water organism device.
Object of the present invention can reach by the following technical programs: a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation, include Venturi tube assembly and tray assemblies that mutual serial connection communicates, the feed-water end of Venturi tube assembly connects high-pressure pump waste water plant, and the water side of tray assemblies connects outlet conduit.
Described Venturi tube assembly is connected to communicate with Venturi tube by front transition diffuser tube and forms; Described tray assemblies is connected to communicate with rear transition diffuser tube by the sleeve that sieve tray is housed and forms, and wherein, the osculum of front transition diffuser tube is connected and is communicated by inlet channel with high-pressure pump waste water plant; Venturi tube consists of front hydraucone ,Hou footpath pipe and rear diffuser tube, front loudspeaker are connected and communicate with the large mouth of front transition diffuser tube, large mouthful of rear diffuser tube is connected and communicates with the sleeve that sieve tray is housed, the water side of sleeve of sieve tray and the large mouth of rear transition diffuser tube are housed and are connected and communicate, the osculum of rear transition diffuser tube is connected and communicates with outlet conduit.
Between described inlet channel, front transition diffuser tube, Venturi tube, the sleeve that sieve tray is housed and rear transition diffuser tube two adjacent components, by flange, connect and communicate.
Described sieve tray shrink range coordinates and packs in described sleeve.
On described sieve tray, be distributed with several sieve apertures.
It is identical that described front transition diffuser tube and described rear excess diffusion pipe have size and dimension.
Adopt after said structure, the present invention is by connecting Venturi tube assembly with tray assemblies, utilize Hydrodynamic cavitation principle, after producing cavitation, the moment that cavitation bubble is crumbled and fall produces high pressure and high temperature, with strong shockwave and jet, similar " wet oxidation ", makes organic substance decomposing in part waste water become CO2, H2O and inorganic oxide, thereby makes COD, BOD degraded.Remaining organism also can be the macromole chain rupture molecule (hydrolysis) that diminishes, and is further oxidized to lipid acid (acidifying), makes BOD/COD raising, improves follow-up biochemical effect.Apparatus of the present invention are applicable to the pre-treatment of the organic waste water of high density bio-refractory, and unrestricted to waste water PH.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is the structural representation of sieve tray embodiment in the present invention.
Fig. 3 is Application Example pipeline schematic diagram of the present invention.
Embodiment
As Figure 1-3, a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation, include Venturi tube assembly and tray assemblies that mutual serial connection communicates, the feed-water end of Venturi tube assembly connects high-pressure pump waste water plant, and the water side of tray assemblies connects outlet conduit.
Described Venturi tube assembly is connected to communicate with Venturi tube by front transition diffuser tube 2 and forms; Described tray assemblies is connected to communicate with rear transition diffuser tube 8 by the sleeve 7 that sieve tray 6 is housed and forms, and wherein, the osculum of front transition diffuser tube 2 is connected and is communicated by inlet channel 1 with high-pressure pump waste water plant; Venturi tube consists of front hydraucone 3 ,Hou footpath pipes 4 and rear diffuser tube 5, front loudspeaker 3 are connected and communicate with the large mouth of front transition diffuser tube 2, large mouthful of rear diffuser tube 5 is connected and communicates with the sleeve 7 that sieve tray 6 is housed, the water side of sleeve 7 of sieve tray 6 and the large mouth of rear transition diffuser tube 8 are housed and are connected and communicate, the osculum of rear transition diffuser tube 8 is connected and communicates with outlet conduit 9.
Between described inlet channel 1, front transition diffuser tube 2, Venturi tube, the sleeve 7 that sieve tray 6 is housed and 8 liang of adjacent components of rear transition diffuser tube, by flange 10, connect and communicate.
Described sieve tray 6 shrink range coordinate and pack in described sleeve 7.
On described sieve tray 6, be distributed with several sieve apertures 61.
The Hydrodynamic cavitation that the present invention adopts is to utilize fluid to pass through the pipeline shrinking, as the larynx footpath pipe 4 of Venturi or the densely covered sieve aperture 61 of sieve tray 6, waste water flow velocity is increased suddenly, produce pressure drop, when pressure has dropped to below water temperature saturated vapour pressure, water-soluble gas can discharge, and vaporizing liquid produces a large amount of " cavitation bubble ", " cavitation bubble " is circuitous while increasing to surrounding pressure, and volume can be compressed to " crumbling and fall ".Crumbling and fall of cavity is to complete moment, and theoretical its whole process of research is μ s(microsecond) measure, at this moment cavity is crumbled and fall and can be made it in very low range, produce 50MPa(500 technical atmosphere around) high pressure and the high temperature of 1500 ℃ ~ 5000 ℃.
Obviously, high temperature and high pressure so, just possess " wet type air oxidation " (Wet Air Oxidation---condition WAO), even far beyond.The condition of WAO is emergent pressure 22.7MPa, and critical temperature is 374.1 ℃, and air is oxygenant." burning " carried out in wet type air oxidation in water, just there is no light and flame, and this is to be different from firewood in combustion synthesis in air part, but is the process of total oxygen exothermic heat of reaction equally.Cavitation is to realize with the simplest mode and device.Certainly, this method thoroughly complete 100% ground is cleared up whole organism in waste water, and it can only go to clear up to a certain extent, and awaits perfect further.
As shown in Figure 1, waste water is to be injected by high-pressure hydraulic pump from inlet channel 1, and premenstrual transition diffuser tube 2 enters Venturi tube, and Venturi tube is comprised of front hydraucone 3 ,Hou footpath pipes 4 and rear diffuser tube 5 three parts, makes an integral body.In the cavitation oxidation decomposition course Shi Hou footpath pipe 4 of waste water, complete, water forms eddy current in rear diffuser tube 5, the complicated turbulent state of turbulent flow.Then again among the diversed some sieve apertures 61 of sieve tray 6 that enter in sleeve 7, in sieve aperture 61, complete cavitation oxygenolysis for the second time.Sieve aperture 61Shuo, aperture and the arrangement of sieve tray 6, be to do the calculating that meets cavitation conditions, and the calculating of Venturi is comparison standard, herein without repetition.Sieve tray 6 coordinates and packs in sleeve 7 by mechanical small shrink piezometric, in case leak high pressure water along periphery, then transition diffuser tube and outlet conduit connection after same size and shape.The sieve aperture of sieve tray is arranged with multiple, and Fig. 2 is wherein a kind of.
Adopt flange 10 to connect all parts, installation, demolition, repair, replacement conveniently, are manufactured simple, cheap.Material can use steel (40,40Mn steel quench after average tempering), be convenient to inner hole grinding polishing.Meet corrosion sour water, available plastics car is inserted in steel cylinder after making, in case split.A large amount of production useful ceramics are made.
Because the oxidising process of cavitation is exceedingly fast, be some μ s, therefore at Venturi larynx footpath pipe 4 and the some sieve apertures 61 of sieve tray 6 interior moments, can complete.For guarantee the reaction times as far as possible long the and sieve tray 6 of Chang Xie，Hou footpath pipe 4 thick need get as calculated as far as possible large, also increase thereupon of energy consumption certainly.
This method is cleared up simple and quick to organism in water, facility input and running cost are cheap.But pump lift and power are very large, especially connect after two kinds of devices.Because it can not come so thoroughly as wet type air oxidation, clearance can be up to more than 99.9%.But cavitation process can be on the partial organic substances basis of limitedly degrading, then make diminish molecule (hydrolysis) and small organic molecule of macromole partly be oxidized to lipid acid (acidifying), make obtaining BOD/COD ratio and improving, for follow-up biochemistry lays the foundation.
Embodiment as shown in Figure 3, water treatment device is comprised of water storage tank A, the large high-power impeller pump B of stroke, under meter C, built-up type cavitation device D of the present invention and header tank E.Autogamy phenolic waste water, CODcr 1000mg/L, exhausts water storage tank A water through repeating twice, and at header tank E sample examination, CODcr clearance can reach 21.2%, BOD5/CODcr and rise to 16.8% by original 2.7%.If want to promote again COD removal effect, have many processing parameters to need to be studied.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the claims in the present invention scope change and modify, and all should belong to the covering scope of the claims in the present invention.
Claims (5)
1. a device for degrading waste water organic matters by combined type hydraulic power cavitation, it is characterized in that: include Venturi tube assembly and tray assemblies that mutual serial connection communicates, the feed-water end of Venturi tube assembly connects high-pressure pump waste water plant, and the water side of tray assemblies connects outlet conduit;
Described Venturi tube assembly is connected to communicate with Venturi tube by front transition diffuser tube and forms; Described tray assemblies is connected to communicate with rear transition diffuser tube by the sleeve that sieve tray is housed and forms, and wherein, the osculum of front transition diffuser tube is connected and is communicated by inlet channel with high-pressure pump waste water plant; Venturi tube consists of front hydraucone ,Hou footpath pipe and rear diffuser tube, front loudspeaker are connected and communicate with the large mouth of front transition diffuser tube, large mouthful of rear diffuser tube is connected and communicates with the sleeve that sieve tray is housed, the water side of sleeve of sieve tray and the large mouth of rear transition diffuser tube are housed and are connected and communicate, the osculum of rear transition diffuser tube is connected and communicates with outlet conduit.
2. a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation according to claim 1, is characterized in that: between described inlet channel, front transition diffuser tube, Venturi tube, the sleeve that sieve tray is housed and rear transition diffuser tube two adjacent components, by flange, connected and communicated.
3. a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation according to claim 1 and 2, is characterized in that: described sieve tray shrink range coordinates and packs in described sleeve.
4. a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation according to claim 1 and 2, is characterized in that: on described sieve tray, be distributed with several sieve apertures.
5. a kind of device for degrading waste water organic matters by combined type hydraulic power cavitation according to claim 1 and 2, is characterized in that: it is identical that described front transition diffuser tube and described rear transition diffuser tube have size and dimension.
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| CN201210040830.8A CN102531146B (en) | 2011-11-23 | 2012-02-22 | Device for degrading waste water organic matters by combined type hydraulic power cavitation |
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| CN201120469882 | 2011-11-23 | ||
| CN201120469882.8 | 2011-11-23 | ||
| CN201210040830.8A CN102531146B (en) | 2011-11-23 | 2012-02-22 | Device for degrading waste water organic matters by combined type hydraulic power cavitation |
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| CN102531146B true CN102531146B (en) | 2014-01-15 |
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