CN103880229A - Microwave catalytic oxidation apparatus for landfill leachate treatment - Google Patents
Microwave catalytic oxidation apparatus for landfill leachate treatment Download PDFInfo
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- CN103880229A CN103880229A CN201410107491.XA CN201410107491A CN103880229A CN 103880229 A CN103880229 A CN 103880229A CN 201410107491 A CN201410107491 A CN 201410107491A CN 103880229 A CN103880229 A CN 103880229A
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- microwave
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- catalysis oxidation
- microwave reactor
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Abstract
The invention discloses a microwave catalytic oxidation apparatus for landfill leachate treatment. The microwave catalytic oxidation apparatus mainly comprises a mixed water tank, a microwave reactor, a water cooling device, a circulating system and an automatic control system, wherein an overflow valve, a water inlet and a dosing tank are arranged on the upper part of the mixed water tank, and a water level indicator and an aeration pipe are arranged in the mixed water tank; the microwave reactor is surrounded by a housing, an outer wire, a magnetron, a transformer and a coil pipe are arranged in the microwave reactor, and the microwave reactor is connected with a cooling system; the circulating system is provided with a forward connecting pipe and a backward connecting pipe, the two of which are connected with the mixed water tank and the microwave reactor, and the connecting pipes are connected to the lower end of the coil pipe of the microwave reactor; the backward connecting pipe is provided with a water outlet and a circulating water pipe, and the circulating water pipe is communicated with the mixed water tank; and the microwave reactor and the water cooling device are connected with the automatic control system. The microwave catalytic oxidation apparatus is applied to landfill leachate treatment, and is high in microwave utilization rate, long in service life of the magnetron, good in leachate treatment effect, and also can be automatically controlled.
Description
Technical field
The present invention relates to field of Environment Protection, be specifically related to sewage treatment area, more particularly, relate to a kind of microwave catalysis oxidation equipment and treatment process of percolate.
Background technology
Percolate refers to and derives from the moisture that in refuse landfill, rubbish itself contains, the sleet water that enters landfill yard and other moisture, the saturation moisture capacity of deduction rubbish, overburden layer, and experience waste layer and overburden layer and a kind of waste water of forming.The complicated components of percolate, water quality and quantity changes greatly, ammonia-nitrogen content is high, organic pollutant content is high, not only contains and is difficult in a large number biodegradable organic pollutant, also contains all kinds of heavy metals, a kind of high concentrated organic wastewater of complicated component, the threat very large to environment structure.Along with " household refuse landfill sites pollution control criterion " enforcement (GB16889-2008), COD, ammonia nitrogen, heavy metal have been proposed to requirements at the higher level, how dealing carefully with percolate has become the important topic of current water treatment field.
Because the biodegradability of percolate is poor, adopt single biochemical treatment to be difficult to prove effective, must adopt materialization treatment technology or materialization processing and biochemical treatment combination technology, what wherein have typicalness is " high-pressure membrane separation " Technology and " materialization+biochemistry+membrane sepn " Technology.The former is Separation of Water and pollutent effectively, but because membrane separation can not be degraded, removal of pollutants, correspondingly can produce a large amount of more difficult, concentrated sewage of disposing; The latter's biochemical treatment process can be degraded effectively, removal of pollutants, and membrane separation process can separate effectively removes the not amounts of residual contamination of bio-degradable, but also can produce condensed water.Up to now, a large amount of method for treating garbage percolation liquids all do not reach efficient level.
Microwave (microwave, MW) because of have rapidly and efficiently heating, thermal source with not directly contact, selectivity heating of medium, be easy to the advantages such as control, no waste generation and be used to be combined with catalyzer, oxygenant, realize degraded and the mineralising of pollutent.The General Principle of microwave irradiation reaction is: microwave first acts on catalyzer or its carrier heats up rapidly it and produces active site position, just can be induced to occur catalyzed reaction in the time that pollutent is in contact with it.The design of microwave and the selection of catalyzer are two key factors that affect microwave irradiation efficiency.But there is following shortcoming in traditional microwave oven: 1. power density is lower, cannot realize the oxidation experiment that field intensity is had relatively high expectations, and also the temperature that conventional microwave oven cannot assaying reaction system, the concrete state of uncontrollable reaction; 2. the microwave heating of conventional microwave oven mainly concentrates on the bottom of furnace chamber, and organic microwave catalysis oxidation needs stirring, backflow and dropping system mostly in waste water, the generally middle part in stove, center of reaction, thus inhomogeneous to the heating of material, cause more side reaction; 3. conventional microwave oven is intermittent type heating, starts energy consumption large, and microwave field dispersion, can not focus on catalyst activity site, and microwave utilising efficiency is not high; 4. adopt air cooling mode, cooling efficiency is low, causes magnetron short work-ing life.
Summary of the invention
The present invention be overcome the microwave heating existing in existing microwave catalysis oxidation technology discontinuous, start that energy consumption is large, the shortcoming such as microwave and active site are difficult to effective combination, magnetron work-ing life is short, provide that a kind of microwave utilising efficiency is high, magnetron long service life, percolate treatment effect are good, the microwave catalysis oxidation equipment for the treatment of percolate that can automatically control and the method for utilizing this device processes percolate.
Technical scheme provided by the invention is: a kind of microwave catalysis oxidation equipment, mainly comprises mixing tank, microwave reactor, refrigerating unit, the recycle system, automatic control system;
Mixing tank top is provided with surplus valve (2) and water-in (6), grug feeding jar (7), is provided with aeration tube (4) and water level gauge (5) in mixing tank;
Microwave reactor is surrounded by shell (19), is provided with outer silk (11), magnetron (16), transformer (15), coil pipe (18) therein, and microwave reactor is connected with refrigerating unit (17);
The recycle system is provided with the forward connecting tube that connects mixing tank and microwave reactor, which is provided with water circulating pump (8), magnetic valve (9), under meter (12), and described connecting tube is connected with coil pipe (18) lower end of microwave reactor; The recycle system is provided with the connecting tube that returns that connects microwave reactor and mixing tank, it is connected with coil pipe (18) upper end, on it, establish gate valve (10), the described connecting tube that returns is provided with water outlet (1) and circulating pipe (3), and described circulating pipe (3) is communicated in mixing tank;
Automatic control system comprises temperature measurer (13), control panel (14); Microwave reactor is connected with automatic control system with refrigerating unit, and wherein, described refrigerating unit is water-chilling plant.
Described microwave catalysis oxidation equipment, by described control panel (14) preset temp and time, and measure water temperature by temperature measurer (13), as reach design temperature and time, waste water is discharged by water outlet (1), otherwise still returns to mixing tank by circulating pipe (3).
Described microwave catalysis oxidation equipment, automatic control system also comprises attached emergency switch (20), in emergency circumstances can open attached emergency switch (20), cuts off the electricity supply.
The method of the microwave catalysis oxidation device processes waste water described in the present invention also provides, it comprises the steps:
(1) by pending waste water, iron carbon abundant mixed aeration in mixing tank, and regulate pH value to 3.0-5.0, obtain reaction mixture;
(2) reaction mixture is entered to the coil pipe (18) in microwave reactor by water circulating pump (8);
(3) set microwave reaction actuator temperature and working time, open automatic operational system;
(4) in operational process toward portion-wise addition H in mixing tank
2o
2solution;
(5) measure water temperature by temperature measurer (13), as reach design temperature and time, discharged by water outlet (1) through microwave catalysis oxidation waste water after treatment;
(6) the pH value through microwave catalysis oxidation water after treatment is adjusted to 8.0-9.0, leaves standstill 15-30 minute, complete treating processes.
Above-mentioned method, described waste water is percolate.
Above-mentioned method, described iron carbon is 20-40 order, and waste water and iron carbon are 100-200:1 in mass ratio.
Above-mentioned method, set microwave reaction actuator temperature and be 70-80 ℃ and working time 15-30 minute.
Above-mentioned method, the H of interpolation
2o
2strength of solution is 30%, and addition is pressed percolate: H
2o
2liquor capacity ratio is counted 100:1-3.
The present invention has following beneficial effect:
The present invention adopts coil pipe water flowing, magnetron water-cooled, the mode such as temperature automatically controlled to design microwave catalysis oxidation equipment, by adopting coil pipe water flowing and the equally distributed mode of magnetron, reduce the unit cross section water yield, guarantee that water body homogeneous heating situation is issued to the higher requirement of some local microwave field densities, thereby make microwave multi-focusing in catalyst activity site, improve microwave utilising efficiency; Coil pipe water flowing also makes waste water fully mix and contact with catalyzer zero dead angle, plays stirring action, heats more even; Magnetron adopts water-cooling pattern, and cooling efficiency is high, extends magnetron work-ing life, and can continous way heating, reduces intermittent type and starts caused energy loss; Employing temperature sensor is temperature automatically controlled, automatically cuts off magnetron heating system in the time that temperature exceedes 80 ℃, keeps the normal operation of water circulation system, thereby proceeds the oxidizing reaction under hot environment.Utilize this microwave equipment and iron carbon to be combined to form microwave catalysis oxidation technology, utilize on the one hand iron carbon and microwave, H
2o
2heterogeneous synergy, makes some some position of iron carbon surface produce " sparking " and form active centre, the Fe that simultaneously utilizes iron-carbon micro-electrolysis anodic reaction to generate
2+as catalyzer, with external source H
2o
2form Fenton oxidation system, the formation of Cu Jin ﹒ OH under microwave exposure effect, thereby the catalyzed oxidation effect of heat effect, non-thermal effect and (class) Fenton of collaborative performance microwave is effectively degraded to percolate middle and high concentration organism, utilize the heavy metal ion existing in iron carbon absorption percolate (as Cu simultaneously
2+, Ni
2+), supplement the iron that may run off, thereby maintain the catalytic equilibration of (class) Fenton oxidation system.Therefore, adopt technical scheme of the present invention, can greatly improve microwave utilising efficiency and organic degradation efficiency, treatment time shortens greatly, simple to operate, continuously scale processing, be easy to suitability for industrialized production, non-secondary pollution, is applicable to the processing of percolate.
Accompanying drawing explanation
Fig. 1 is microwave catalysis oxidation device structure schematic diagram.
Wherein, 1 be water outlet, 2 for surplus valve, 3 for circulating pipe, 4 for aeration tube, 5 for water level gauge, 6 for water-in, 7 for grug feeding jar, 8 for water circulating pump, 9 for magnetic valve, 10 for gate valve, 11 for outer silk, 12 under meter, 13 for temperature measurer, 14 for control panel, 15 for transformer, 16 for magnetron, 17 for cooling tower, 18 for coil pipe, 19 for shell, 20 be emergency switch.
Embodiment
According to following embodiment, the present invention may be better understood.But, those skilled in the art will readily understand, the described concrete material ratio of embodiment, processing condition and result thereof, only for the present invention is described, are not limitation of the present invention.
embodiment 1
Microwave catalysis oxidation equipment is shown in Fig. 1, mainly comprises mixing tank, microwave reactor, water-chilling plant, the recycle system, automatic control system.Mixing tank top is provided with surplus valve 2, water-in 6, grug feeding jar 7, is provided with water level gauge 5, aeration tube 4 in mixing tank.Microwave reactor is surrounded by shell 19, is provided with outer silk 11, magnetron 16, transformer 15, coil pipe 18 therein, and microwave reactor is connected with cooling system 17.The recycle system is provided with the forward connecting tube that connects mixing tank and microwave reactor, which is provided with water circulating pump 8, magnetic valve 9, under meter 12, and connecting tube is connected with coil pipe 18 lower ends of microwave reactor; The recycle system is also provided with the connecting tube that returns that connects microwave reactor and mixing tank, and it is connected with coil pipe 18 upper ends, establishes gate valve 10 on it, described in return to connecting tube and be provided with water outlet 1 and circulating pipe 3, described circulating pipe 3 is communicated in mixing tank.Automatic control system comprises temperature measurer 13, control panel 14; Microwave reactor is connected with automatic control system with water-chilling plant.
Microwave catalysis oxidation equipment of the present invention, by control panel 14 preset temps, and measures water temperature by temperature measurer 13, as reaches design temperature and time, and waste water is discharged by water outlet 1, otherwise still returns to mixing tank by circulating pipe 3.
Microwave catalysis oxidation equipment of the present invention, automatic control system also comprises attached emergency switch 20, in emergency circumstances can open attached emergency switch 20, cuts off the electricity supply.
In this enforcement, coil pipe adopts PP material, caliber 38mm, and microwave reactor shell adopts 304 stainless steels.
embodiment 2
The microwave catalysis oxidation device processes percolate that utilizes embodiment 1, method is as follows:
(1) pending percolate, iron carbon (30 order) are pressed to fully mixed aeration of 100:1 (mass ratio), and regulated pH value to 5.0, obtain reaction mixture;
(2) reaction mixture is entered to the coil pipe in microwave reactor by water pump;
(3) setting microwave reaction actuator temperature is that 80 ℃, working time are 30 minutes, opens automatic operational system;
(4) in operational process, in mixing tank, press percolate: 30%H
2o
2(volume ratio)=100:3 divides and adds H 5 times
2o
2solution;
(5) will be adjusted to 9.0 through microwave catalysis oxidation percolate pH after treatment value, leave standstill 25 minutes.
(6) get supernatant liquor and measure its COD
cr.COD
crdrop to 429mg/L after treatment by 6720mg/L before treatment, clearance is 93.6%.
embodiment 3
The microwave catalysis oxidation device processes percolate that utilizes embodiment 1, method is as follows:
(1) pending percolate, iron carbon (40 order) are pressed to fully mixed aeration of 200:1 (mass ratio), and regulated pH value to 4.0, obtain reaction mixture;
(2) reaction mixture is entered to the coil pipe in microwave reactor by water pump;
(3) setting microwave reaction actuator temperature is that 70 ℃, working time are 15 minutes, opens automatic operational system;
(4) in operational process, in mixing tank, press percolate: 30%H
2o
2(volume ratio)=100:1 divides and adds H 4 times
2o
2solution;
(5) will be adjusted to 8.0 through microwave catalysis oxidation percolate pH after treatment value, leave standstill 15 minutes.
(6) get supernatant liquor and measure its COD
cr.COD
crdrop to 958mg/L by 19260mg/L, clearance is 95.1%.
embodiment 4
The microwave catalysis oxidation device processes percolate that utilizes embodiment 1, method is as follows:
(1) pending percolate, iron carbon (20 order) are pressed to fully mixed aeration of 150:1 (mass ratio), and regulated pH value to 3.0, obtain reaction mixture;
(2) reaction mixture is entered to the coil pipe in microwave reactor by water pump;
(3) setting microwave reaction actuator temperature is that 80 ℃, working time are 20 minutes, opens automatic operational system;
(4) in operational process, in mixing tank, press percolate: 30%H
2o
2(volume ratio)=100:2 divides and adds H 5 times
2o
2solution;
(5) will be adjusted to 9.0 through microwave catalysis oxidation percolate pH after treatment value, leave standstill 30 minutes.
(6) get supernatant liquor and measure its COD
cr.COD
crdrop to 737mg/L by 13965mg/L, clearance is 94.7%.
Claims (9)
1. a microwave catalysis oxidation equipment, mainly comprises mixing tank, microwave reactor, refrigerating unit, the recycle system, automatic control system, it is characterized in that:
Mixing tank top is provided with surplus valve (2), water-in (6), grug feeding jar (7), is provided with aeration tube (4), water level gauge (5) in mixing tank;
Microwave reactor is surrounded by shell (19), is provided with outer silk (11), magnetron (16), transformer (15), coil pipe (18) therein, and microwave reactor is connected with refrigerating unit (17); The recycle system is provided with the forward connecting tube that connects mixing tank and microwave reactor, which is provided with water circulating pump (8), magnetic valve (9), under meter (12), and described connecting tube is connected with coil pipe (18) lower end of microwave reactor; The recycle system is provided with connection microwave reactor and mixing tank returns to connecting tube, it is connected with coil pipe (18) upper end, on it, establish gate valve (10), described in return to connecting tube and be provided with water outlet (1) and circulating pipe (3), described circulating pipe (3) is communicated in mixing tank;
Automatic control system comprises temperature measurer (13), control panel (14); Microwave reactor is connected with automatic control system with refrigerating unit.
2. microwave catalysis oxidation equipment as claimed in claim 1, it is characterized in that: by described control panel (14) preset temp and time, and measure water temperature by temperature measurer (13), as reach design temperature and time, waste water is discharged by water outlet (1), otherwise still returns to mixing tank by circulating pipe (3).
3. microwave catalysis oxidation equipment as claimed in claim 1, is characterized in that: automatic control system also comprises attached emergency switch (20), in emergency circumstances can open attached emergency switch (20), cuts off the electricity supply.
4. microwave catalysis oxidation equipment as claimed in claim 1, is characterized in that: described refrigerating unit (17) is water-chilling plant, is preferably water cooling tower.
5. according to the method for the microwave catalysis oxidation device processes waste water described in claim 1 to 4 any one, it is characterized in that comprising the steps:
(1) by pending waste water, iron carbon abundant mixed aeration in mixing tank, and regulate pH value to 3.0-5.0, obtain reaction mixture;
(2) reaction mixture is entered to the coil pipe (18) in microwave reactor by water circulating pump (8);
(3) set microwave reaction actuator temperature and working time, open automatic operational system;
(4) in operational process toward portion-wise addition H in mixing tank
2o
2solution;
(5) measure water temperature by temperature measurer (13), as reach design temperature and time, discharged by water outlet (1) through microwave catalysis oxidation waste water after treatment;
(6) the pH value through microwave catalysis oxidation water after treatment is adjusted to 8.0-9.0, leaves standstill 15-30 minute, complete treating processes.
6. according to the method for microwave catalysis oxidation device processes waste water claimed in claim 5, it is characterized in that: described waste water is percolate.
7. according to the method for microwave catalysis oxidation device processes waste water claimed in claim 5, it is characterized in that: described iron carbon is 20-40 order, and waste water and iron carbon are 100-200:1 in mass ratio.
8. according to the method for microwave catalysis oxidation device processes waste water claimed in claim 5, it is characterized in that: set microwave reaction actuator temperature and be 70-80 ℃ and working time 15-30 minute.
9. according to the method for microwave catalysis oxidation device processes waste water claimed in claim 5, it is characterized in that: the H of interpolation
2o
2strength of solution is 30%, and addition is pressed percolate: H
2o
2liquor capacity ratio is counted 100:1-3.
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| CN201410107491.XA CN103880229B (en) | 2014-03-22 | 2014-03-22 | A kind of microwave catalysis oxidation equipment for the treatment of percolate |
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| CN103880229B CN103880229B (en) | 2016-04-20 |
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| CN104341070A (en) * | 2014-10-21 | 2015-02-11 | 苏州富奇诺水治理设备有限公司 | Microwave water treatment device capable of self heat dissipation |
| CN107720934A (en) * | 2016-12-14 | 2018-02-23 | 南京工业大学 | High-efficiency low-consumption catalytic ozonation wastewater treatment device and method |
| CN108033513A (en) * | 2018-01-22 | 2018-05-15 | 北京石油化工学院 | A kind of microwave radiation sewage disposal reaction system |
| CN108996654A (en) * | 2018-07-11 | 2018-12-14 | 广州机械设计研究所 | A kind of microwave catalysis oxidation organic waste water treating device |
| CN110479753A (en) * | 2019-07-30 | 2019-11-22 | 广东工业大学 | A kind of microwave catalysis oxidation device and method of organic polluted soil |
| CN112225376A (en) * | 2020-09-29 | 2021-01-15 | 减一污泥处理技术(江苏)有限公司 | Sludge microwave treatment generator and water pyrolysis method |
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| CN110479753A (en) * | 2019-07-30 | 2019-11-22 | 广东工业大学 | A kind of microwave catalysis oxidation device and method of organic polluted soil |
| CN112225376A (en) * | 2020-09-29 | 2021-01-15 | 减一污泥处理技术(江苏)有限公司 | Sludge microwave treatment generator and water pyrolysis method |
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