CN101941772A - Municipal sewage purifying system in accordance with requirement of clean production - Google Patents

Municipal sewage purifying system in accordance with requirement of clean production Download PDF

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Publication number
CN101941772A
CN101941772A CN 201010274988 CN201010274988A CN101941772A CN 101941772 A CN101941772 A CN 101941772A CN 201010274988 CN201010274988 CN 201010274988 CN 201010274988 A CN201010274988 A CN 201010274988A CN 101941772 A CN101941772 A CN 101941772A
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China
Prior art keywords
flow reactor
photochemical catalysis
piston flow
sewage
equalizing tank
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Pending
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CN 201010274988
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Chinese (zh)
Inventor
张�杰
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WUHAN WISDOM TECHNOLOGY Co Ltd
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WUHAN WISDOM TECHNOLOGY Co Ltd
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Priority to CN 201010274988 priority Critical patent/CN101941772A/en
Publication of CN101941772A publication Critical patent/CN101941772A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a municipal sewage purifying system in accordance with the requirement of clean production, in particular to a system for purifying municipal sewage by applying the photocatalytic technology. The purification process of the system accords with the requirement of national clean production. The system comprises a water-collecting well, a grid, an adjusting tank, a magnetic field generator, a photocatalytic plug flow reactor and a purified water sedimentation tank. The municipal sewage treatment plants constructed by the system have compact structure, small floor area, low construction cost, stable effluent quality up to the standard, low operation cost and simple and convenient operation and maintenance, do not emit odor and have sludge up to the direct emission standard.

Description

Clean the urban sewage purification system
Technical field:
The present invention relates to a kind of urban sewage purification system that cleans, relate in particular to a kind of system that uses the photocatalysis technology clarifying urban sewage, the scavenging process of this system meets the requirement that country cleans production.
Background technology:
Municipal sewage treatment is meant sewage character for a change, makes it not produce the measure that endangers and take to the environment waters.Municipal sewage treatment generally is divided into three grades: one-level is handled, and is that the Applied Physics facture is removed undissolved pollutent in the sewage; Second-stage treatment is the applying biological facture is degraded to simple material with the oxidation operation of various complexity in the sewage; Tertiary treatment is the applied chemistry precipitator method, biochemical process, physico-chemical processes etc., the organism of the phosphorus in the removal sewage, nitrogen, difficult degradation, inorganic salt etc.Usually municipal sewage treatment is treated to pre-treatment with one-level, and second-stage treatment is a main body, and tertiary treatment is seldom used.Because the excess sludge that second-stage treatment is discharged can cause secondary pollution, therefore also to carry out sludge treatment.Simultaneously (mainly being second-stage treatment) also can discharge odorant pollutant gas in firsts and seconds is handled, and must carry out purifying treatment to these odorant pollutant gas, could discharge after up to standard.So the urban sewage treatment technology that China adopts at present is not an environmental protection technology truly, because it has been transferred to pollutent in atmosphere and the soil by the discharging of odorant pollutant gas and mud from water.The scarcity of water resources and importance make people never stop exploration to the sewage purification new technology.Nearly ten or twenty is over year, and photocatalysis technology begins to be applied to purification of water quality, has obtained numerous very positive achievements at aspects such as photocatalysis mechanism, catalyzer developments.A large amount of studies show that photochemical catalysis is not only active h +With the OH free radical organism is oxidized to CO by series reaction 2And H 2O can also reduce simultaneously Cr6 +, Hg2 +, Ag +Etc. heavy metal ion and inorganic pollutant.To be applied to the reason that sewage disposal purifies be photo catalysis reactor have been carried out the design and the application of different modes both at home and abroad at present though photocatalysis technology is failed heavy industrialization, but just rest on small-sized sewage treatment process and experimental stage, such as water purifier etc., the research and development of the photo catalysis reactor of relatively largeization are not carried out as yet.
Summary of the invention:
The objective of the invention is by designing large-scale a, TiO efficiently 2The photochemical catalysis piston flow reactor, and carry out integratedly with other supplementary unit and technology as core, a kind of urban sewage purification system that cleans is provided.The present invention is made up of pump well, grid, equalizing tank, odor removal, field generator for magnetic, photochemical catalysis piston flow reactor and water purification settling tank etc.
Purification mechanism of the present invention and process: municipal effluent is transported to pump well through pipe network, enters equalizing tank after grid is handled.The main effect of equalizing tank is to carry out the sewage water yield to regulate, and the sewage with evening and morning stores as far as possible, so that utilize daytime natural light to carry out light catalytic purifying; Equalizing tank will have a spot of volatile gases pollutent and overflow in the process of carrying out water yield adjusting, this part gas pollutant is removed by odor removal.When sewage rises to water distributor by intake pump, because the sewage cutting magnetic line, dissolved oxygen content in the sewage is increased and produce H 2O 2, the pollutants in sewage macromolecular mass becomes small molecules.Dissolved oxygen content increases and produces H in the sewage 2O 2Can reduce the recombination probability (this is because oxygenant can be captured conduction band electron forcefully) in electronics and hole, improve activity of such catalysts; The pollutent macromolecular mass becomes small molecules, can strengthen contacting of pollutent and photocatalyst surface, improves degradation speed.When sewage flows in the mode of plug flow in reactor by water distributor, pollutent under the effect of photocatalyst catalyst surface or near continuous generation oxygenolysis and reduction reaction, make pollutants in sewage obtain degraded and purify.Under the monitoring of environmental administration, water purification enters physical environment by settling tank Bashel groove.Mud in the settling tank has also been participated in light-catalyzed reaction during by reactor with minimum colloidal sol form before precipitation, because heavy metal ion and inorganic pollutant in the water are reduced into non-toxic products, therefore, the mud in the water purification settling tank cleans simultaneously.In overcast and rainy or spring, open the auxiliary irradiation of source of artificial light, to guarantee needed UV-light flux of light-catalyzed reaction and intensity.Use the municipal sewage plant that this system builds, compact construction, floor space is little, and its construction cost is cheap, stable effluent quality is up to standard, running cost is little, running maintenance is simple and convenient, no foul smell discharges, mud reaches direct emission standard.
The main points of the present invention's design (embodiment) are:
(1) pump well upper end inwall, whole grid surface, equalizing tank upper end inwall must be filmed with the titania coated film agent, so as sewage before entering reactor as much as possible by light-catalyzed reaction some pollutents wherein of degrading;
(2) the main effect of equalizing tank is to carry out the sewage water yield to regulate, and the sewage with evening and morning stores as far as possible, so that utilize daytime natural light to carry out light catalytic purifying.This is an extraordinary energy-saving design theory, overflows but equalizing tank will have the volatile gases pollutent in the process of carrying out water yield adjusting, and this part gas pollutant can not efflux to inorganization, and need purify.Solution is: odor removal is made, installed to the regulation of pressing the 2nd, 3 of claims.Odor removal utilizes the natural light deodorizing daytime, utilizes the UV-irradiation deodorizing of amalgam vapour lamp evening.
(3) water-in of equalizing tank is located at the end that the photochemical catalysis piston flow reactor is equipped with water distributor, arrange water inlet pipe pump (making sewage enter water distributor) at this end from equalizing tank, water pipe navigates within cluster U-shaped alnico magnets, so that enter water distributor behind the sewage cutting magnetic line;
(4) be ready to full-amount ceramic rod photocatalyst earlier, specification is diameter 0.5cm, long 5-8cm, and ceramic rod photocatalyst one end is used to embed concrete, and the other end of load nano-titanium dioxide film coats (construction is removed after finishing again) with plastics film.When carrying out the construction of photochemical catalysis piston flow reactor bed body flute profile concrete structure, allow the ceramic rod photocatalyst embed the about 2cm of bottom surface concrete, distance between adjacent two is identical, for about 1cm, form ceramic rod photocatalyst array, use powder sprayer that nano titanium oxide is loaded on the bottom surface and both sides inner-wall surface of flute profile concrete structure simultaneously, utilize the coherency of cement to form titanium deoxid film.The structure design of water distributor will ensure that sewage enters the photochemical catalysis piston flow reactor with uniform form.The long-acting amalgam vapour lamp of low pressure of some band reflection units is installed on the both sides of flute profile concrete structure; Sewage is in the plug flow process, pollutants in sewage does not have back-mixing on flow direction, and on the plane perpendicular to flow direction, because the perturbation action of ceramic rod photocatalyst array, pollutants in sewage is at utmost mixed and is disperseed, and has so just built up very ideal photochemical catalysis piston flow reactor;
(5) the water purification settling tank is built reactor outlet below in, and sewage falls to spatter in the exit and enters settling tank after the photochemical catalysis piston flow reactor purifies, and enters physical environment through the Bashel groove.Purifying waste water in the settling tank do not contain microorganism, heavy metal ion and organic pollutant etc., has been the extraordinary water of quality, can directly use as reuse water in the water-deficient area, or can be used as the tap water use after dealing with slightly.
Embodiment:
This area engineering technical personnel are according to the main points of technical scheme of the present invention and above-mentioned design (embodiment), can use the present invention and design corresponding municipal sewage plant and come clarifying urban sewage.The present invention also can be used for the expansion project of existing municipal sewage plant.
20,000 tons of sewage works were handled at embodiment 1 certain county town in newly-built day
Application the present invention-clean this sewage work of urban sewage purification system design, significant parameter is as follows:
(1) the long 100m of equalizing tank, wide 50m, volume 15000m 3, place the reactor below;
(2) select Kawasaki Heavy Industries titania coated film agent for use, Wuhan circumference nano titanium dioxide powder;
(3) odor removal: the foamed ceramics photocatalyst directly embeds between equalizing tank and the reactor outer bottom, (make, and reactor outer bottom isolated edge 10cm, every 5m 1000W low pressure amalgam vapour lamp is installed by 50 * 50 * 5cm) load nano-titanium dioxide films by the 5ppi foamed ceramics for the foamed ceramics photocatalyst;
(4) fix 1 and can produce the U-shaped alnico magnets that intensity is 2T magnetic field, allow water inlet pipe pass the U-shaped alnico magnets;
(5) the photochemical catalysis piston flow reactor is from equalizing tank 0.5m, long 100m, and wide 50m, ceramic rod photocatalyst specification is diameter 0.5cm, long 6cm.
According to Hubei Province's quota of budget criterion calculation, about 5,800,000 yuan of this sewage work's construction cost is significantly less than existing construction cost.

Claims (10)

1. one kind cleans the urban sewage purification system, it is characterized in that it is made up of pump well, grid, equalizing tank, odor removal, field generator for magnetic, photochemical catalysis piston flow reactor and water purification settling tank;
2. pump well according to claim 1, grid, equalizing tank is characterized in that pump well and equalizing tank upper end inwall and grid surface film with the titania coated film agent; Equalizing tank places photochemical catalysis piston flow reactor below fully, between equalizing tank and the photochemical catalysis piston flow reactor outer bottom odor removal is installed;
3. odor removal according to claim 1, it is characterized in that it mainly is made up of foamed ceramics photocatalyst and the amalgam vapour lamp that is installed in photochemical catalysis piston flow reactor outer bottom edge, foamed ceramics photocatalyst system adopts the method for cold air power spraying and coating, forms film at foamed ceramics specific surface load nano-titanium dioxide powder and forms;
4. field generator for magnetic according to claim 1 is characterized in that installing and fixing cluster U-shaped alnico magnets and forms, and water inlet pipe passes and enters water distributor after the U-shaped alnico magnets make the sewage cutting magnetic line;
5. photochemical catalysis piston flow reactor according to claim 1 is characterized in that its shape is a flute profile, and an end is installed water distributor, and the other end is as outlet, and water distributor and water inlet pipe pump constitute impeller;
6. photochemical catalysis piston flow reactor according to claim 1 is characterized in that its body is the flute profile concrete structure, and outer bottom is from equalizing tank 0.5-2m;
7. photochemical catalysis piston flow reactor according to claim 1 is characterized in that using powder sprayer that nano titanium oxide is loaded on the bottom surface and both sides inner-wall surface of flute profile concrete structure, utilizes the coherency of cement to form titanium deoxid film;
8. photochemical catalysis piston flow reactor according to claim 1, it is characterized in that the sole arrangement specification at the flute profile concrete structure is that diameter is that 0.5cm, length are the ceramic rod photocatalyst array of 5-12cm, the about 1cm of distance between adjacent two ceramic rod photocatalysts, ceramic rod photocatalyst array forms disturbance to the sewage in the plug-flow; Ceramic rod photocatalyst system adopts the method for cold air power spraying and coating to form film at ceramic rod area load nano titanium dioxide powder and forms;
9. photochemical catalysis piston flow reactor according to claim 1 is characterized in that installing on the both sides of its flute profile concrete structure the long-acting amalgam vapour lamp of low pressure of some band reflection units;
10. water purification settling tank according to claim 1, it is characterized in that settling tank is arranged in photochemical catalysis piston flow reactor outlet below, sewage falls to spatter in the exit and enters settling tank after the photochemical catalysis piston flow reactor purifies, and the settling tank discharge outlet is installed the Bashel groove.
CN 201010274988 2010-09-03 2010-09-03 Municipal sewage purifying system in accordance with requirement of clean production Pending CN101941772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010274988 CN101941772A (en) 2010-09-03 2010-09-03 Municipal sewage purifying system in accordance with requirement of clean production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010274988 CN101941772A (en) 2010-09-03 2010-09-03 Municipal sewage purifying system in accordance with requirement of clean production

Publications (1)

Publication Number Publication Date
CN101941772A true CN101941772A (en) 2011-01-12

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CN 201010274988 Pending CN101941772A (en) 2010-09-03 2010-09-03 Municipal sewage purifying system in accordance with requirement of clean production

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108326A1 (en) * 2005-04-12 2006-10-19 Yunlong Peng Magnetizing photocatalytic compact wastewater reclamation and reuse device
CN101033105A (en) * 2007-02-01 2007-09-12 彭云龙 Photoelectromagnetism integrated waste water advanced oxidization method and device thereof
CN101618918A (en) * 2009-07-30 2010-01-06 杨春辉 Optomagnetic sewage treatment device and optomagnetic sewage treatment method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006108326A1 (en) * 2005-04-12 2006-10-19 Yunlong Peng Magnetizing photocatalytic compact wastewater reclamation and reuse device
CN101033105A (en) * 2007-02-01 2007-09-12 彭云龙 Photoelectromagnetism integrated waste water advanced oxidization method and device thereof
CN101618918A (en) * 2009-07-30 2010-01-06 杨春辉 Optomagnetic sewage treatment device and optomagnetic sewage treatment method

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Application publication date: 20110112