CN103193345A - Device and dilatation method for treating wastewater by forcibly intercepting catalyst by adopting microwave photocatalytic coupling and degrading technology - Google Patents

Abstract

The invention relates to a device and a dilatation method for treating wastewater by forcibly intercepting a catalyst by adopting the microwave photocatalytic coupling and degrading technology, belongs to the technical field of wastewater treatment and aims to overcome the defects of loss of nano-catalysts, small treatment amount of the single tank of a reactor, high frequency of repeated operation and low general-circulation intensity of internal liquid in the prior art. The technical scheme aims at solving the above problem based on giving consideration to the effects of microwave excitation and photochemical catalytic degradation coupling. The dilation method comprises the following steps of: forcibly partitioning the microwave irradiation space inside a reactor by a metal cage so that the wastewater is coupled, catalyzed and degraded in the metal cage, and substantially extending and dilating the reaction space outside the metal cage. The dilation method further comprises the following steps of: arranging a bell-mouthed component which is used for guiding and strengthening the circulation of a liquid flow under the metal cage, and intercepting nanometer photocatalyst particles step by step by using three external cascaded backwashing filters which are different in filtering hole size.

Description

The microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception

Technical field

The present invention relates to a kind of microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception, belong to the C02F technical field of waste water processing.

Background technology

Microwave and photo catalysis degradation treatment technology, is quite paid close attention to effectively at the innoxious process for treating that contains the organic pollutant trade effluent in recent years as a kind of.

About the microwave and photo catalysis degradation technique, as an example, can be the Chinese patent application case of CN102260003A referring to publication number.

The disclosure number is the Chinese patent application case of CN102260003A, be as excitaton source with microwave, excite electrodeless ultraviolet lamp emission ultraviolet ray, be mixed with the suspension liquid of photocatalyst titanium dioxide in the liquid internal irradiation, this electrodeless ultraviolet lamp is shrouded by silica tube to be protected, there is pneumatic pump to continue to inject air to this silica tube inner chamber, the air that is overflowed by quartzy chamber is via pipeline and the micro porous aeration head UNICOM that is positioned at reactor bottom, the lower zone of this inside reactor is the aeration zone, the upper area of this inside reactor is the microwave and photo catalysis reaction zone, this scheme is also with the built-in membrane separation assemblies of reactor, carry the water of analysing after the purification, and realize that with this membrane separation assemblies holding back again of photocatalyst titanium dioxide fine particles use; This scheme is also set up dividing plate between electrodeless ultraviolet light source and membrane separation assemblies, be used for preventing that ultraviolet ray is to the radiation injury of the membrane separation assemblies of organic matter; Feed the air of inside reactor, part is participated in the photocatalytic degradation reaction that relies on photocatalyst titanium dioxide directly, some air, under the direct irradiation of UV-light, generate a certain amount of ozone, the ozone of this generation is also being brought into play the direct oxidative degradation at organic pollutant certainly.

The disclosure is number for the Chinese patent application case of CN102260003A has undoubtedly played very important pushing effect for the progress of microwave and photo catalysis waste water degradation technique, and the work that its research staff launches in this field is admirable.

Based on the meaning of sincere admiration, and, common striving direction, what will talk below us is problem.

One of problem:

The disclosure number is the Chinese patent application case of CN102260003A, its membrane separation assemblies that is used for interception catalyzer titanium dioxide fine particles is to be placed in the reactor inner chamber, be immersed in and handle among the object liquid, and rely on the ozone bubbles that contains of ascension to wash away membrane separation assemblies, it is adsorbed to remove its surface by this, the catalyst particles that is detained, reach the recovery of catalyst particles, the recycling purpose, simultaneously, membrane separation assemblies also is to rely on this mode self-cleaning and keep its separating power, so, based on this structure, can only select for use commercial with curtain formula hollow fiber film assembly or plate film assembly, and this membrane separation assemblies is need be immersed in the context of strong oxidizing property of ozone bubbles ascension, therefore, oxidation tolerance to membrane separation assemblies must have requirement, the organic membrane separation assembly of common material can not tolerate such environment for use, so can only select the membrane separation assemblies of PVDF material for use, this point clearly illustrates that in open the 0009th section literal of text of this case and claim 3; Its material cost of the filter membrane of the oxidation tolerance that this kind needs are special is higher, and its commercially available price also is higher than common organic micro-filtration membrane module of non-oxidation tolerance requirement certainly; In other words, the frame mode of this case causes the material of membrane separation assemblies to be limited to expensive PVDF material.Have again, UV-light possible in the device is revealed, may touch the organic membrane assembly, this also the organic membrane assembly material in the claimed apparatus can resist ultraviolet light irradiation, from this point, based on the organization plan of this device, the material of organic membrane separation assembly also can only be limited in expensive PVDF material.

The organic membrane assembly has its apparent advantage compared to the ceramic filter assemblies; About this point, for the personage of filtering technique specialty, be known, here do not launch to give unnecessary details.

Can so, under the prerequisite of using the organic material membrane module, bypass this PVDF filter membrane material limitation? this is the problem that needs solve, and this is one of problem.

Two of problem:

Scouring force in view of described ascension bubble, cleaning capacity is more weak, therefore, can only select other filter opening aperture of bigger micro-filtration level for use with its aperture of membrane separation assemblies that this cleaning mode is used, other filter opening aperture of this micro-filtration level is the 0.1-0.2 micron, about this point, in open the 0009th section literal of text of this case and claim 3, have clearly equally and limit, this kind filter opening aperture limits, type selecting from the such membrane separation assemblies of this case, built-in and soak use-pattern, the self-cleaning method of ascension bubble, be inevitable, can only limit its filter opening aperture in the micro-filtration rank.In other words, this its scouring force of mode that washes away with the ascension bubble, cleaning power too a little less than, to such an extent as to can't tackle the more filter membrane of small-bore at all, thus, in this case device, the filter membrane aperture is limited between 0.1 micron-0.2 micron, is the inevitable choice of not discussing leeway.

The filter opening aperture of so-called 0.1-0.2 micron, if change a measure unit, corresponding is exactly the filter opening aperture of 100-200 nanometer; Is what concept that? with 100 nanometer filter opening apertures of its lower limit, its size of catalyst particles that it can be tackled must be more than 100 nanometers, and can't be blocked less than the catalyst particles of 100 nanometers; In other words, less than the catalyst particles of 100 nanometers will directly penetrate, by the filter opening of membrane module, sneak among the so-called water purification that the DeR device exports.

Particle diameter and the photocatalyst dosage form selection of the related photocatalyst of the ultraviolet catalytic DeR of need having a talk now.

The professional person who is engaged in photocatalytic degradation research knows, with the photochemical degradation reaction of uv light induction, its catalyzer multiselect titanium dioxide fine particles catalyzer; At present, on laboratory level, developed the photodegradation particle catalyst based on the optically catalytic TiO 2 characteristic various in style, certainly, the photodegradation catalyzer that these different preparation methods form, its particle diameter also is various; Its particle diameter of photocatalyst that different preparation methods make is little of 20 nanometers, to also namely 100 microns of 100000 nanometers, has greatly, wherein is no lack of the photocatalyst kind of excellent performance; But because the restriction of the evaluation of performance permanent stability, preparation cost and market expansion etc. aspect factor, most its deliverabilities of described photocatalyst only are confined to laboratory level, and do not have to form extensive commercially available production level; The at present known commercially available photocatalysts that are used for the UV-light wave band that can actually use in a large number that can make a big purchase in large quantities be famous gas phase titanium dioxide P25; Its concrete art-recognized meanings of gas phase titanium dioxide P25, the insider knows, does not here launch to give unnecessary details; The median size of gas phase titanium dioxide P25 is 21 nanometers; Gas phase titanium dioxide P25 performance is not very optimum, but, its stable performance, key is can make a big purchase in large quantities in market to obtain, and can on technical scale, use in a large number, therefore, in the photochemical catalysis specialized laboratory also usually with the P25 catalyzer be used as weighing various self-made photocatalyst catalytic performances with reference to pointer or contrast pointer, in fact, characteristics in view of the ultraviolet catalytic DeR, the photocatalyst that dispersity is more high, be fit to the needs of this type reaction, that is to say, the photocatalyst of median size about 21 nanometers its catalyst interfacial area that can provide, anti-sedimentation capacity, catalytic performance permanent stability etc. aspect, comprehensive, be optimal.Say simply, at present good and cheap, the photocatalyst of the UV-light wave band of the ready-made commercially available commercial grade that can actually make a big purchase in large quantities, use, be exactly median size be the gas phase titanium dioxide P25 catalyzer of 21 nanometers; At plant-scale application, this median size is that the photocatalyst of 21 nanometers is actual first-selections.

Above address, the disclosure number is the Chinese patent application case of CN102260003A, it is used for the membrane module of interception photocatalyst, be to wash away the stripping film assembly surface adsorbed with the ascension bubble, the catalyst particles of deposition, yet, its scouring force of mode that this kind washes away with the ascension bubble, cleaning power too a little less than, to such an extent as to can't tackle the more filter membrane of small-bore at all, therefore, in this case device, the filter membrane aperture is limited at micro-filtration filter opening rank between 0.1 micron-0.2 micron, change a measure unit, in this case device, the filter membrane aperture is limited at the micro-filtration filter opening rank between 100 nanometers-200 nanometer, and this is the inevitable choice of not discussing leeway; The micro-filtration filter opening that this case does not have between selectable 100 nanometers-200 nanometer can't be tackled the gas phase titanium dioxide P25 particle that aforesaid median size is 21 nanometers certainly; So, if use the P25 photocatalyst, this catalyzer will can't be tackled fully, and flows in the so-called water purification, forms secondary pollution, certain heavy losses that also cause catalyzer and unrenewable; Even if use other kind for this reason and the titanium dioxide optical catalyst of special big particle diameter, collide because of mutual collision or with wall in its use, must also can produce a large amount of small particle size fragments, wherein particle diameter is less than the fragment of 100 nanometers, can not be tackled by the micro-filtration filter opening between 100 nanometers-200 nanometer equally, these small shredss also can see through its membrane module and enter among the so-called water purification, form secondary pollution.

As seen, the disclosure number is the Chinese patent application case of CN102260003A, and its cleaning scheme at the interception structure scheme of photocatalyst particulate and related film assembly is all undesirable.

Therefore, how under the prerequisite of this case advantage of incorporating things of diverse nature, reaching at the meticulous interception of photocatalyst particulate and reclaim usefulness again, is an important topic very worth thinking deeply about, and this is two of problem.

Three of problem:

We know, liquid water body itself also can absorb the energy of microwave, and cause itself temperature-rise effect of processed liquid water body, and this temperature-rise effect of following wastewater treatment process and occurring, it but not the situation that we expect, in other words, microwave energy from magnetron is not used to excite electrodeless ultraviolet lamp fully, and have quite a few only to be used for exciting the microwave energy of electrodeless ultraviolet lamp to be dissipated in described temperature-rise effect, the temperature-rise effect that this kind is not fond of has caused unnecessary microwave energy to waste, in view of above-mentioned publication number is the apparatus structure scheme that the Chinese patent application case of CN102260003A is showed, its rational approach, can only be to reduce the purpose that single jar of processing capacity is reached the unnecessary dissipation of reduction microwave in other words by the volume that reduces the microwave and photo catalysis reactor, about this point, clear suitable size of having expressed about this apparatus structure integral body in this its embodiment of CN102260003A application case, the preferred size correspondence that it is expressed be exactly a device that profile is very little, so, thus, the distance of reactor wall and microwave radiation source is little, the wastewater flow rate that contacts with microwave is little, waste water institute microwave energy absorbed is also little relatively, with it accordingly, single jar wastewater treatment capacity is therefore also little, more particularly, the corresponding internal capacity of device suitable size expressed in the embodiment is 40 liters, also be that single jar of wastewater treatment capacity is 40 liters, namely 0.04 cube, in other words, it is once a complete set of, substantial length of operation has only solved 0.04 cube trade effluent, so, just need carry out many times by the repetition of head to the operation of the complete set of tail, adding up of its treatment capacity just has plant-scale meaning, so to say, just individual analogy roughly, its preferred structure size of this case is single jar of 0.04 cube of such wastewater treatment capacity of correspondence roughly, need to repeat 1000 times by the complete set of head to tail, substantial length of operation, its accumulation amount, just can reach 40 cubes such one have industrial level wastewater treatment capacity, so excessively loaded down with trivial details repetitive operation will cause manpower, the serious waste of material resources, as seen, this kind its actual waste water degradation treatment efficient of scheme of being showed by CN102260003A may not be fully up to expectations.Therefore, how not cause more microwave energy wastes or to reduce under the prerequisite of microwave energy waste, increase single jar of wastewater treatment capacity, reduce the unnecessary too many by the repetitive operation number of times of head to tail of this intermittent type wastewater treatment equipment, improving its waste water treatment efficiency, is a significant technical problem that merits attention.

On the other hand, according to the literature, some system, under the situation of the direct irradiation wastewater liquid of microwave, the photochemical catalysis degradation efficiency truly has raising, that is to say, in some system, between the direct irradiation wastewater liquid of microwave and the photochemical catalysis degraded, there is certain coupling.

Therefore, how to take into account under the prerequisite of described coupling, improving the processing efficiency of waste water decomposition apparatus, be worth inquiring into, this is three of problem.

Four of problem:

The scheme that this kind showed by CN102260003A, the bubble of the inner dispersed ascension of its retort for the cyclic motion of the relative big scale of driving a reaction jar internal liquid, is contributed inadequate slightly; Certainly, this weak point, in fact corresponding small size, the low capacity device of clear expression in CN102260003A scheme such as its embodiment, the influence that almost has nothing observable.From plant-scale application demand, undersized device that can not the divergence process amount does not have great magnetism certainly; So, as a kind of possibility, if there is certain mode can realize the significantly expansion for the treatment of capacity, under this situation, its importance of the cyclic motion of the relative big scale of retort internal liquid will highlight naturally; Imagining the possibility that this treatment capacity is significantly expanded, so, how to strengthen the cyclic motion of the relative big scale of retort internal liquid, is exactly an individual problem certainly, and this is four of problem.

Five of problem:

Photochemical catalysis oxidizing reaction for the UV-light wave band, there is following so several key element can have influence on the efficient of this kinds of oxidation reaction, first ultraviolet wavelength, intensity, it two is particle diameters of photocatalyst, the usage quantity of photocatalyst in the unit volume reaction solution, himself catalytic performance etc. of photocatalyst, it three is that oxidized object is organic concentration in the water body, oxidation complexity that the organic molecule structure determines himself etc., it four is sufficient degree of oxygen atmosphere, under the identical situation of other condition, the sufficient degree of oxygen atmosphere will become a very important key element that influences photochemical catalysis oxidative degradation ability.

The scheme of showing as CN102260003A, its numerous micro porous aeration head disperseds that are placed in reactor inner chamber bottom are in the bottom, and by its alleged water distribution board, make the effect of this micro porous aeration head dispersed arrangement become more very, certainly, this is for the situation of the oarse-grained micron-sized photocatalyst that uses relatively easy sedimentation, really there is its favourable one side, but, from another side, the mode that this micro porous aeration head dispersed is arranged, the supply of oxygen atmosphere too disperses, and in fact need most enhanced oxygen blowing the zone be the effective area of photochemical catalysis oxidation, because the Effective depth penetration of short wave ultraviolet in liquid water body has only about 20 centimetres, therefore, needing most enhanced oxygen blowing in fact is exactly zone within peripheral about 20 cm distance of silica tube with the effective area that promotes photochemical catalysis oxidation process, in other words, zone within about 20 cm distance of silica tube periphery is really to need enriched with oxygen atmosphere to supply with the zone that ensures, this regional oxygen atmosphere is supplied with more strong, and oxidizing reaction is also just carried out more soon; Especially especially, produce electrodeless ultraviolet emission in the microwave excitation mode, its characteristics can be accomplished high-power, high strength exactly, this is the strong point of this lamp type of electrodeless ultraviolet lamp, yet, just because of the superpower of its uv-radiation, high strength just more need mate with powerful oxygen atmosphere supply capacity, otherwise, that powerful uv-radiation ability is that major part has been wasted really just.Above address, the scheme of showing as CN102260003A, many effects limit its reactor size, limited its actual treatment capacity, just as clearly illustrating that in its specific embodiment, that can only be that one single jar single treatment amount has only the little reactor about 40 liters, at so little reactor, under the situation of little inner chamber, because size itself is just very little, so, its shortcoming aspect photochemical catalysis oxidation effective area oxygen supply concentration degree just can not be so obvious, even can ignore, more even fully can regard a non-existent problem at all as, in the face of such undersized little reactor, about the shortcoming problem of oxygen supply concentration degree aspect, not may float mind; But, imagine, if can overcome described many limiting factors, if can there be one of way actual implementation large-scale, the reactor of high throughput, effective area oxygen supply reinforcement problem will show especially out within so above-mentioned silica tube periphery 20 cm distance, especially for the situation of using electrodeless ultraviolet lamp as UV source, effective area oxygen supply reinforcement problem is not allowed to despise more within above-mentioned silica tube periphery 20 cm distance, therefore, how among the structure of possible large-scale electrodeless ultraviolet light catalysis oxidative degradation device, strengthen the oxygen supply concentration degree of described effective area, improve the usefulness of waste water degraded equipment, the problem that individual exactly needs are kept a close watch on, this is five of problem.

Six of problem:

This CN102260003A scheme pumps air within the silica tube that includes electrodeless ultraviolet lamp, reach the aeration-cooling of electrodeless ultraviolet lamp, cooling purpose, and those flow through the air of silica tube, because being subjected to ultraviolet irradiation, some air can change ozone into, therefore, the air that flows out from silica tube is exactly the air that contains some ozone certainly, this scheme contains ozone-air with this and is transferred to and is positioned at reactor below micro porous aeration head, and disengage from micro porous aeration head, contain in the ozone bubbles ascension process from bottom to top at these, wherein contained ozone can meet with and take place redox reaction with the organic molecule that runs among the distance, this redox reaction can consume a part of ozone certainly, this does not have query, but, above address, the scheme of showing as CN102260003A, the many effects limit that can't ignore that certainly exist its reactor size, limited its actual treatment capacity, just as clearly illustrating that in its specific embodiment, that can only be that one single jar single treatment amount has only the little reactor about 40 liters, at so little reactor, under the situation of little inner chamber, because overall dimension itself is just very little, so, the longitudinal size of its reactor inner chamber or regard that to contain the liquid degree of depth also can only be a very little size as with reckoning in every item, this size is as clearly illustrating that among its embodiment, have only about 40 centimetres, the Sheng that the reckons in every item liquid degree of depth also just has only 40 centimetres, in fact contain the liquid degree of depth and be less than this number certainly, just analyze with 40 centimetres the Sheng liquid degree of depth, so, is this Sheng liquid degree of depth of 40 centimetres what concept? that is to say, contain the ozone-air ascension and have only short 40 centimetres by the path of waste water, this path is too short, containing the ozone-air bubble passes through at a gallop and only has only 40 centimetres of dark water bodys, too short duration of contact with water body, contained ozone in the bubble, can only there be a very little part to be used to the oxidative degradation organism, and most ozone is in fact just passed by liquid simply, from the liquid level effusion and through the exhaust port emptying, briefly, the oxygenizement potentiality major part of these ozone has been wasted, and, effusion, in fact the ozone that is wasted can cause unnecessary atmospheric pollution; The main contriver of this case once squeezed in one meter dark tank via micro porous aeration head with the normal domestic use ozone machine and contained ozone-air, reach in the depth of water degree of depth under one meter the situation, still can near the water surface, obviously smell the smell of ozone, as seen, the sort of 40 centimetres of dark Sheng liquid degree of depth obviously are to be not enough to utilize fully ozone; As seen, for the such equipment of electrodeless ultraviolet light chemical catalysis waste water DeR device, ozone utilizes incomplete problem also to need to pay close attention to, obviously, what people more expected is that the ozone utilization is more complete, contaminative exhaust emissions no extreme ultraviolet waste water DeR device still less, and this is six of problem.

Summary of the invention

Technical problem to be solved by this invention is, be technical background with the CN102260003A scheme, at one of this its existing problem of technical background scheme of above addressing, two, three, four, five, six, and take into account microwave exposure and encourage collaborative, the coupling of degrading with photochemical catalysis, research and develop a kind of novel method that can solve this series problem totally.

The present invention solve the technical problem by following scheme, this scheme provides a kind of microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception, the key step of this method is as follows: a, microwave exposure spatial domain constrainer with the cage shape of metal material wraps up the silica tube that its inner bay is provided with electrodeless ultraviolet lamp, make silica tube be in the inside of the microwave exposure spatial domain constrainer of this cage shape, its whole locations of structures of microwave exposure spatial domain constrainer of this cage shape is the inside at waste water DeR device, the microwave exposure spatial domain constrainer of the cage shape of this metal material is exactly a metal cage, be a mass of hole or mesh in its structure of this metal cage, the function of the microwave exposure spatial domain constrainer of this cage shape is that the microwave exposure spatial domain is constrained in its inside, by this irradiation spatial domain or microwave zero irradiation spatial domain a little less than making up microwave between the inwall of the outer wall of the microwave exposure spatial domain of cage shape constrainer and reactor; B, the waveguide that is derived from magnetron is probeed into the inside of waste water DeR device, and that end that probes into waste water DeR device inside of this waveguide and the inner chamber of described metal cage carried out UNICOM, described UNICOM refers to connection and the perforation on the microwave channel meaning; C, the circulation conductor of the simple and easy speaking trumpet that a profile shape is connected like two ends vertically be placed in upside down greatly described metal cage under, and make its major part hydraucone of this circulation conductor be in vacant state, the function of this circulation conductor be pack from the ascension path that contains the ozone-air bubble of micro porous aeration head, and lead inside reactor liquid to make the cyclic motion of relative big scale by the strength that pulls because of the bubble flow that is subjected to the ascension that pack strengthens; D moves into its major part hydraucone edge of described circulation conductor within the scope that the vertical projection of reactor inner chamber bottom surface is drawn a circle to approve with micro porous aeration head; E, the size in irradiation spatial domain or microwave zero irradiation spatial domain a little less than three-dimensional extension, the described microwave of expansion inside reactor; F sets up topping-up pump in the outside of reactor, and this topping-up pump is used for the DeR water afterwards that the supercharging pumping is mixed with catalyzer suspension grain, and the feed-water end of this topping-up pump is connected with the inner chamber of reactor; G connects the water side of described topping-up pump with the water-in of the preposition prefilter of back flush type, the filter opening aperture of the preposition prefilter of this back flush type is between 5 microns and 300 microns; H, the pure water inlet of the preposition prefilter of described back flush type is connected via the water-in of first water purifying valve with back flush type tubular fibre membrane microfiltration strainer, and the filter opening aperture of this back flush type tubular fibre membrane microfiltration strainer is between 25 nanometers and 1000 nanometers; I, the pure water inlet of described back flush type tubular fibre membrane microfiltration strainer is connected via the water-in of second water purifying valve with back flush type hollow-fibre membrane ultra filtration filter, and the filter opening aperture of this back flush type hollow-fibre membrane ultra filtration filter is between 15 nanometers and 2 nanometers; J connects via first sewage valve the sewage outlet of the preposition prefilter of described back flush type with the inner chamber of reactor; K connects via second sewage valve the sewage outlet of described back flush type tubular fibre membrane microfiltration strainer with the inner chamber of reactor; L connects via the 3rd sewage valve the sewage outlet of back flush type hollow-fibre membrane ultra filtration filter with the inner chamber of reactor.

The described spatial domain of this case one word refers to space, territory, boundary.

Described its outline shape of circulation conductor or also can be described as the profile shape like the cooling tower in fuel-burning power plant.

The material that is used for the making metal cage can be any metal material; But in view of the special environment condition that waste water degraded operation is faced, the preferred material of this metal cage is stainless steel.

Selecting to use under the situation of stainless steel, the step of this method of this case can also comprise the making step of metal cage: this step is raw material with the stainless steel punched-plate, makes described metal cage through mold pressing, welding, riveted joint or by the splicing process of screw, nut.

Selecting to use under the situation of stainless steel, the step of making metal cage also can be such: this step is raw material with the Stainless Steel Wire, makes described metal cage through weaving.

Distance between the inwall of metal cage and the silica tube outer wall is arbitrarily, any distance all is that allow, enforceable, yet, preferred scheme is, in step a, distance between the outer wall of the inwall of control metal cage and the silica tube that wraps up in it makes this distance between 3.0 centimetres and 30.0 centimetres.

Further preferred scheme about the distance between metal cage inwall and the silica tube outer wall is that in step a, the distance between the outer wall of the inwall of control metal cage and the silica tube that wraps up in it makes this distance between 10.0 centimetres and 20.0 centimetres.

Any metal material with enough electroconductibility can be selected for use to be used as the waveguide material, yet in view of the particular surroundings of waste water degraded operation, corrosion resisting property is top-priority factor, so the preferred material of waveguide is stainless steel.

The material of described circulation conductor is not limit, and the material of described circulation conductor for example can be tetrafluoroethylene material, glass material, ceramic material, metal material, etc., still, its preferred material of circulation conductor is stainless steel.

Described topping-up pump is the machinery for the supercharging pumping liquid, and certainly, its pumping pressure can be selected as required arbitrarily, and various topping-up pump market is all on sale.

Described water purifying valve, sewage valve all are water valves, and various water valve market is all on sale; About water valve, itself art-recognized meanings of this word is known; Different titles is adopted in this case, just statement for convenience, the convenient water valve of distinguishing each different structure position.

The preposition prefilter of described back flush type also claims back flush type fore filter or back flush type prefilter, and itself art-recognized meanings of the preposition prefilter of described back flush type is known; The preposition prefilter of described back flush type market is on sale.

Described back flush type tubular fibre membrane microfiltration strainer is the strainer that is suitable for micro-filtration; Itself art-recognized meanings of described micro-filtration one word is known; Itself art-recognized meanings of described back flush type tubular fibre membrane microfiltration strainer is known for the professional in membrane separation technique field; Described back flush type tubular fibre membrane microfiltration strainer market is on sale.

Described back flush type hollow-fibre membrane ultra filtration filter is the strainer that is suitable for ultrafiltration; Itself art-recognized meanings of described ultrafiltration one word is known; Itself art-recognized meanings of described back flush type hollow-fibre membrane ultra filtration filter is known for the professional in membrane separation technique field; Described back flush type hollow-fibre membrane ultra filtration filter market is on sale.

Described back flush type hollow-fibre membrane ultra filtration filter can be the form that a back flush type hollow-fibre membrane ultra filtration filter monomer is only arranged; Certainly, this back flush type hollow-fibre membrane ultra filtration filter also can be made up of in the connection parallel with one another of more than one back flush type hollow-fibre membrane ultra filtration filter monomer quantity.

Express a related word in parallel, the art-recognized meanings that itself refers to is clearly.

Express related monomer one word, refer to itself function and structure equipment individuality completely.

Similarly, described back flush type tubular fibre membrane microfiltration strainer can be the form that a back flush type tubular fibre membrane microfiltration strainer monomer is only arranged; Certainly, this back flush type tubular fibre membrane microfiltration strainer also can be made up of in the connection parallel with one another of more than one back flush type tubular fibre membrane microfiltration strainer monomer quantity.

This method can also may further comprise the steps: on the connecting pipeline of the water-in of described back flush type tubular fibre membrane microfiltration its pure water inlet of strainer and described back flush type hollow-fibre membrane ultra filtration filter, serial connection is gone into second topping-up pump, and this second topping-up pump is used for augmenting hydraulic pressure to satisfy the intake pressure demand of described back flush type hollow-fibre membrane ultra filtration filter; This step is optional.

The preferable range of the bore of its hole of described metal cage or mesh is between 0.5 centimetre and 3.0 centimetres; But, if must select to use other bore value outside this preferable range, also be that this case allows, even so, do not advise using the bore value beyond this preferable range.

This case method can further include some other steps, described other step for example: the regulating step of relative distance between metal cage and the silica tube that wraps up in it; Described other step is more for example: metal cage is at the regulating step of the installation site of waste water DeR device inside; Described other step is more for example: the change step of breather line, under the situation that the described metal cage of this case is installed, need the penetrating metal cage with the breather line of silica tube two ends UNICOM, and therefore to carry out breather line and change step; Described other step is more for example: be used for the strainer of impurity screening in reactor waste water input terminus serial connection, in order to avoid impurity particle enters the reactor inner chamber; Described other step is more for example: at reactor waste water input front end serial connection settling tank, be used for the precipitable impurity of precipitation part; Described other step is more for example: at reactor waste water input front end serial connection waste water pH value equalizing tank, so that the waste water pH value of input reactor reaches the equipment claimed level; Described other step is more for example: remove external being used for and lift pump that built-in membrane separation assemblies connects of that reactor, this step is at the background technology scheme; Etc..

Advantage of the present invention is, partition is forced in microwave exposure spatial domain to waste water DeR device inside, this case is protected electrodeless ultraviolet lamp and screen thereof with silica tube with metal cage and is shrouded in it, metal cage retrains the effect spatial domain of microwave simultaneously, so, spatial domain between silica tube outer wall and metal cage inwall has formed the waste water degraded areas of a microwave and photochemical catalysis coupling, and, the multiple hole of metal cage or the structure of many meshes, do not influence waste water and reactor bottom bubbling and on the air freedom into and out of this spatial domain; And the spatial domain between metal cage and reactor wall, the waste water water body is contained the unhelpful dissipation of the microwave energy that significantly weakened thus to the simple pyrogenicity absorption of microwave; This case method forces to cut off the microwave exposure spatial domain of waste water DeR device inside, and based on this, this case method allows to realize the significantly expansion of single jar of reactor volume by significantly expanding the design volume in this no microwave exposure spatial domain; This case method allows single jar of wastewater treatment capacity of reactor significantly to promote, and need not worry that microwave energy dissipates too much in unhelpful waste water water body temperature-rise effect again.

Rely on this case method, the design volume of waste water DeR device is that single jar of wastewater treatment capacity can be expanded to several cubes to dozens of cube; Even single jar hundreds of cubes volume, also allow; Rely on this case method, behind the expansion reactor for treatment capacity, can reduce the frequency of the waste water degraded operation of equipment of a complete set, whole process significantly, be conducive to the saving of human and material resources.

This case method is under the prerequisite of taking into account described microwave and photochemical catalysis coupling, for the significantly expansion of relevant its design capacity of waste water DeR device provides a broad space.

On the other hand, this case method is made the cyclic motion of relative big scale with described circulation conductor guided liquid-flow, ascension contains the ozone gas burble and can pull, guide the liquid stream of inside reactor along the internal passages fast rise of this circulation conductor in the reactor, and after impacting, passing through microwave and photo catalysis coupling reaction zone, by top area to around the diffusion, sink via the neighboring area, arrive reactor intracavity bottom zone, converge to the internal passages of circulation conductor again through the hydraucone of circulation conductor, continue its circulation; The liquid circulation campaign of this relative big scale that is guided helps to guarantee the homogenizing of inside reactor liquid degradation reaction process, and this is necessary for large-scale DeR device.

Its UV source of this case method is to rely on microwave excited electrodeless ultraviolet lamp, the uv-radiation characteristics of this lamp type can be accomplished high-power, high strength exactly, yet the Effective depth penetration of ultraviolet ray in liquid water body only had an appointment 20 centimetres, therefore, zone within about 20 cm distance of silica tube periphery is the effective area, and this zone is exactly the efficient zone of photochemical catalysis oxidative degradation; This case method is with described circulation conductor, pack is from the bubble flow of numerous micro porous aeration heads, its concentrated area is discharged towards silica tube periphery photochemical catalysis oxidation effective area, the oxygen atmosphere that this method helps to improve the described effective area of silica tube periphery is supplied with intensity, helps accelerating ultraviolet catalyzing oxidizing degrading reaction process.

Based on this case method, the capacity of reactor or treatment capacity can significantly be expanded, described significantly expansion, be that the design volume of irradiation zone realizes a little less than microwave zero irradiation zone or the microwave by significantly expanding, so, the lateral dimension of reactor, longitudinal size all is significantly to expand certainly, therefore, inside reactor is contained the liquid degree of depth and can be deepened significantly similarly, for example, can deepen to one meter, two meters, three meters, four meters, five meters, six meters, even ten meters, etc., containing the liquid degree of depth enough under the dark situation, contain ozone-air bubble ascension path sufficiently long, contain the time sufficiently long that the ozone-air bubble contacts with water body, in its ascension process just can with abundant reducing substances fortune, and thoroughly or be close to and exhaust ozone contained in the bubble up hill and dale, thus, contain that ozone composition oxidation potential utilizes incomplete problem to be solved in the ozone-air bubble, and, because long ascension path causes ozone to exhaust, just can not be entrained with the ozone that can cause environmental pollution again in the reactor tail gas.

This case method is with external multistage filter, reach the interception step by step from the collision fragment of the small scale of coacervate macrobead to ten number nanometers to catalyst particles, be close to recovery, reuse photocatalyst up hill and dale, be close to the secondary pollution of taking precautions against catalyst loss up hill and dale and causing; This is hold-up interception method and can protect secondary filter to make its filtration passage avoid the rigid obstruction of large particulate matter step by step; Wherein the pre-filtering aperture of the first step is between 5 microns and 300 microns, and its aperture of partial micro-filtration is between 25 nanometers and 1000 nanometers, and its aperture of the ultrafiltration of the third stage is between 15 nanometers and 2 nanometers; Such hold-up interception method can fully be tackled nano level photocatalyst, and it can be close to certainly and tackle this median size of gas phase titanium dioxide P25 up hill and dale is the catalyzer of 21 nanometers; Preamble is addressed, the gas phase titanium deoxide catalyst of nano level P25 and so on, it is the commercially available catalyzer that to buy in a large number, also be weather resistance, stability, the known good photocatalyst of UV-light wave band photocatalysis performance, certainly, it also is in fact to pay the utmost attention to the photocatalyst of selecting for use in the industrial scale applications; This case catalyzer hold-up interception method is complementary with the virtual rating of catalyzer market supply, actual kind, merges mutually.

And, in this case method, catalyzer interception mechanism is external mechanism, and based on this method, its filter core needn't be soaked in the liquid of the strong oxidation of inside reactor, strong uv irradiation, therefore, can needn't consider the tolerance to uv irradiation, strong oxidizing condition fully, like this, just not have restriction aspect the extraordinary tolerance selecting for use of filter core material, can select in more vast optional material kind, and need not be confined to the material of the PVDF and so on of comparison costliness fully again.

Related strainer at different levels all has commercially available, commercially available strainers at different levels, the discharge outlet of draining-off sewage when its sewage draining exit is exactly back flushing, this class back flush type equipment is used in this case, be to tackle catalyst particles step by step, originally the sewage draining exit of commercially available relevant device, the recovery that is used as being held back catalyst particles in this case method by migrating are again with delivery port or reflux and use delivery port again.

In brief, this case method is taken into account collaborative, the coupling of microwave exposure excitation and photochemical catalysis degraded, retrains the method for microwave more closely by utilizing metal cage, has reached the target that allows the reactor design capacity significantly to expand; Simultaneously, its method has also been strengthened the cyclic motion of the relative big scale of inside reactor liquid; This method has solved the ozone oxidation potentiality simultaneously and has utilized incomplete problem; This method and reached at the nm-class catalyst particulate from the collision fragment of its coacervate macrobead to ten number nanometers widely, meticulous interception; Based on this method, its filter core Material Selection face also thereby enlarged.

This case method has solved described serial problem totally.

Embodiment

The enforcement of this case method, key step is as follows:

A, microwave exposure spatial domain constrainer with the cage shape of metal material wraps up the silica tube that its inner bay is provided with electrodeless ultraviolet lamp, make silica tube be in the inside of the microwave exposure spatial domain constrainer of this cage shape, its whole locations of structures of microwave exposure spatial domain constrainer of this cage shape is the inside at waste water DeR device, the microwave exposure spatial domain constrainer of the cage shape of this metal material is exactly a metal cage, be a mass of hole or mesh in its structure of this metal cage, the function of the microwave exposure spatial domain constrainer of this cage shape is that the microwave exposure spatial domain is constrained in its inside, by this irradiation spatial domain or microwave zero irradiation spatial domain a little less than making up microwave between the inwall of the outer wall of the microwave exposure spatial domain of cage shape constrainer and reactor;

B, the waveguide that is derived from magnetron is probeed into the inside of waste water DeR device, and that end that probes into waste water DeR device inside of this waveguide and the inner chamber of described metal cage carried out UNICOM, described UNICOM refers to connection and the perforation on the microwave channel meaning;

C, the circulation conductor of the simple and easy speaking trumpet that a profile shape is connected like two ends vertically be placed in upside down greatly described metal cage under, and make its major part hydraucone of this circulation conductor be in vacant state, the function of this circulation conductor be pack from the ascension path that contains the ozone-air bubble of micro porous aeration head, and lead inside reactor liquid to make the cyclic motion of relative big scale by the strength that pulls because of the bubble flow that is subjected to the ascension that pack strengthens;

D moves into its major part hydraucone edge of described circulation conductor within the scope that the vertical projection of reactor inner chamber bottom surface is drawn a circle to approve with micro porous aeration head;

E, the size in irradiation spatial domain or microwave zero irradiation spatial domain a little less than three-dimensional extension, the described microwave of expansion inside reactor;

F sets up topping-up pump in the outside of reactor, and this topping-up pump is used for the DeR water afterwards that the supercharging pumping is mixed with catalyzer suspension grain, and the feed-water end of this topping-up pump is connected with the inner chamber of reactor;

G connects the water side of described topping-up pump with the water-in of the preposition prefilter of back flush type, the filter opening aperture of the preposition prefilter of this back flush type is between 5 microns and 300 microns;

H, the pure water inlet of the preposition prefilter of described back flush type is connected via the water-in of first water purifying valve with back flush type tubular fibre membrane microfiltration strainer, and the filter opening aperture of this back flush type tubular fibre membrane microfiltration strainer is between 25 nanometers and 1000 nanometers;

I, the pure water inlet of described back flush type tubular fibre membrane microfiltration strainer is connected via the water-in of second water purifying valve with back flush type hollow-fibre membrane ultra filtration filter, and the filter opening aperture of this back flush type hollow-fibre membrane ultra filtration filter is between 15 nanometers and 2 nanometers;

J connects via first sewage valve the sewage outlet of the preposition prefilter of described back flush type with the inner chamber of reactor;

K connects via second sewage valve the sewage outlet of described back flush type tubular fibre membrane microfiltration strainer with the inner chamber of reactor;

L connects via the 3rd sewage valve the sewage outlet of back flush type hollow-fibre membrane ultra filtration filter with the inner chamber of reactor.

This method of this case is that technical background launches to describe with the CN102260003A scheme; The formed net result of its series of steps of this case method is then irrelevant with this CN102260003A scheme.

The preferred material of this metal cage is stainless steel.

The bore scope of related its hole of this metal cage or mesh of implementing is between 0.5 centimetre and 3.0 centimetres; Any set point value within this scope all is preferred available enforcement value.

Selecting to use under the situation of stainless steel, the step of this method of this case can also comprise the making step of metal cage: this step is raw material with the stainless steel punched-plate, makes described metal cage through mold pressing, welding, riveted joint or by the splicing process of screw, nut.

Selecting to use under the situation of stainless steel, the step of making metal cage also can be such: this step is raw material with the Stainless Steel Wire, makes described metal cage through weaving.

In step a, between the outer wall of the inwall of metal cage and the silica tube that wraps up in it apart from its preferably enforcement value between 3.0 centimetres and 30.0 centimetres; Any distance value within this scope all is the described preferred enforcement value that can allow.

Further embodiment preferred about the distance between metal cage inwall and the silica tube outer wall is, in step a, distance between the outer wall of the inwall of control metal cage and the silica tube that wraps up in it makes this distance between 10.0 centimetres and 20.0 centimetres; Any distance value within this scope all is the described further preferred enforcement value that can allow.

In addition, the preferred enforcement material of waveguide is stainless steel.

Implement related its material of circulation conductor and do not limit, the material of described circulation conductor for example can be tetrafluoroethylene material, glass material, ceramic material, metal material, etc., still, its preferred material of circulation conductor is stainless steel.

Its enforcement of this method can also may further comprise the steps: on the connecting pipeline of the water-in of described back flush type tubular fibre membrane microfiltration its pure water inlet of strainer and described back flush type hollow-fibre membrane ultra filtration filter, serial connection is gone into second topping-up pump, and this second topping-up pump is used for augmenting hydraulic pressure to satisfy the intake pressure demand of described back flush type hollow-fibre membrane ultra filtration filter; This step is optional.

Described other step is also for example: the regulating step of relative distance between metal cage and the silica tube that wraps up in it; Described other step is more for example: metal cage is at the regulating step of the installation site of waste water DeR device inside; Described other step is more for example: the change step of breather line, under the situation that the described metal cage of this case is installed, need the penetrating metal cage with the breather line of silica tube two ends UNICOM, and therefore to carry out breather line and change step; Described other step is more for example: be used for the strainer of impurity screening in reactor waste water input terminus serial connection, in order to avoid impurity particle enters the reactor inner chamber; Described other step is more for example: at reactor waste water input front end serial connection settling tank, be used for the precipitable impurity of precipitation part; Described other step is more for example: at reactor waste water input front end serial connection waste water pH value equalizing tank, so that the waste water pH value of input reactor reaches the equipment claimed level; Described other step is more for example: remove external being used for and lift pump that built-in membrane separation assemblies connects of that reactor, this step is at the background technology scheme; Etc..

Its enforcement of this case method is not limited to above-mentioned steps.

From this case visual angle, CN102260003A scheme as this case background technology, the water distribution board of its appellation that relates in this case structure, ripple dividing plate, built-in membrane separation assemblies and the external members such as lift pump related with membrane separation assemblies, all be unnecessary member, all need to give removal; Certainly, the housing of its reactor also needs to be torn down, and rebuilds according to this case intention; In other words, if be that starting point makes up with this CN102260003A scheme, then this case method can also comprise the removal step at described unnecessary member, and, the step that its reactor shell is torn down, and, carry out the details step that reactor shell rebuilds according to this case intention.

Claims (10)

1. the microwave and photo catalysis of fortifying catalytic agent interception coupling waste water decomposition apparatus expansion method, the key step of this method is as follows: a, microwave exposure spatial domain constrainer with the cage shape of metal material wraps up the silica tube that its inner bay is provided with electrodeless ultraviolet lamp, make silica tube be in the inside of the microwave exposure spatial domain constrainer of this cage shape, its whole locations of structures of microwave exposure spatial domain constrainer of this cage shape is the inside at waste water DeR device, the microwave exposure spatial domain constrainer of the cage shape of this metal material is exactly a metal cage, be a mass of hole or mesh in its structure of this metal cage, the function of the microwave exposure spatial domain constrainer of this cage shape is that the microwave exposure spatial domain is constrained in its inside, by this irradiation spatial domain or microwave zero irradiation spatial domain a little less than making up microwave between the inwall of the outer wall of the microwave exposure spatial domain of cage shape constrainer and reactor; B, the waveguide that is derived from magnetron is probeed into the inside of waste water DeR device, and that end that probes into waste water DeR device inside of this waveguide and the inner chamber of described metal cage carried out UNICOM, described UNICOM refers to connection and the perforation on the microwave channel meaning; C, the circulation conductor of the simple and easy speaking trumpet that a profile shape is connected like two ends vertically be placed in upside down greatly described metal cage under, and make its major part hydraucone of this circulation conductor be in vacant state, the function of this circulation conductor be pack from the ascension path that contains the ozone-air bubble of micro porous aeration head, and lead inside reactor liquid to make the cyclic motion of relative big scale by the strength that pulls because of the bubble flow that is subjected to the ascension that pack strengthens; D moves into its major part hydraucone edge of described circulation conductor within the scope that the vertical projection of reactor inner chamber bottom surface is drawn a circle to approve with micro porous aeration head; E, the size in irradiation spatial domain or microwave zero irradiation spatial domain a little less than three-dimensional extension, the described microwave of expansion inside reactor; F sets up topping-up pump in the outside of reactor, and this topping-up pump is used for the DeR water afterwards that the supercharging pumping is mixed with catalyzer suspension grain, and the feed-water end of this topping-up pump is connected with the inner chamber of reactor; G connects the water side of described topping-up pump with the water-in of the preposition prefilter of back flush type, the filter opening aperture of the preposition prefilter of this back flush type is between 5 microns and 300 microns; H, the pure water inlet of the preposition prefilter of described back flush type is connected via the water-in of first water purifying valve with back flush type tubular fibre membrane microfiltration strainer, and the filter opening aperture of this back flush type tubular fibre membrane microfiltration strainer is between 25 nanometers and 1000 nanometers; I, the pure water inlet of described back flush type tubular fibre membrane microfiltration strainer is connected via the water-in of second water purifying valve with back flush type hollow-fibre membrane ultra filtration filter, and the filter opening aperture of this back flush type hollow-fibre membrane ultra filtration filter is between 15 nanometers and 2 nanometers; J connects via first sewage valve the sewage outlet of the preposition prefilter of described back flush type with the inner chamber of reactor; K connects via second sewage valve the sewage outlet of described back flush type tubular fibre membrane microfiltration strainer with the inner chamber of reactor; L connects via the 3rd sewage valve the sewage outlet of back flush type hollow-fibre membrane ultra filtration filter with the inner chamber of reactor.

2. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception according to claim 1 is characterized in that the selected material of this metal cage is stainless steel.

3. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent according to claim 1 interception, it is characterized in that, in step a, distance between the outer wall of the inwall of control metal cage and the silica tube that wraps up in it makes this distance between 3.0 centimetres and 30.0 centimetres.

4. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent according to claim 3 interception, it is characterized in that, in step a, distance between the outer wall of the inwall of control metal cage and the silica tube that wraps up in it makes this distance between 10.0 centimetres and 20.0 centimetres.

5. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception according to claim 1 is characterized in that the selected material of this waveguide is stainless steel.

6. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception according to claim 1 is characterized in that this profile shape is stainless steel like its material of circulation conductor of the simple and easy speaking trumpet that two ends connect.

7. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent according to claim 1 interception, it is characterized in that this back flush type hollow-fibre membrane ultra filtration filter is made up of in the connection parallel with one another of more than one back flush type hollow-fibre membrane ultra filtration filter monomer quantity.

8. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent according to claim 1 interception, it is characterized in that this back flush type tubular fibre membrane microfiltration strainer is made up of in the connection parallel with one another of more than one back flush type tubular fibre membrane microfiltration strainer monomer quantity.

9. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent according to claim 1 interception, it is characterized in that, this method is further comprising the steps of: on the connecting pipeline of the water-in of described back flush type tubular fibre membrane microfiltration its pure water inlet of strainer and described back flush type hollow-fibre membrane ultra filtration filter, serial connection is gone into second topping-up pump, and this second topping-up pump is used for augmenting hydraulic pressure to satisfy the intake pressure demand of described back flush type hollow-fibre membrane ultra filtration filter.

10. the microwave and photo catalysis coupling waste water decomposition apparatus expansion method of fortifying catalytic agent interception according to claim 1 is characterized in that the bore of its hole of this metal cage or mesh is between 0.5 centimetre and 3.0 centimetres.