CN104100556A - Buried sewage treatment equipment - Google Patents
Buried sewage treatment equipment Download PDFInfo
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- CN104100556A CN104100556A CN201410353032.XA CN201410353032A CN104100556A CN 104100556 A CN104100556 A CN 104100556A CN 201410353032 A CN201410353032 A CN 201410353032A CN 104100556 A CN104100556 A CN 104100556A
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- power supply
- treatment equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses buried sewage treatment equipment. The buried sewage treatment equipment comprises a grid well, an adjusting pool, a primary settling tank, a dynamic oxidation contact pool, a clarifying pool and a fan room which are sequentially connected. The fan room is connected with the dynamic oxidation contact pool. A fan of the fan room serves as a load to be connected with a power supply unit through a drive module. The power supply unit, the drive module and the load are sequentially connected through a connecting cable. At least one core wire is arranged in an outer protective layer of the connecting cable and covers an inner protective layer. An input stage of the drive module is connected with a filtering decoupling circuit restraining differential-mode interference from the power supply unit. A first lightning protection circuit is connected between an input end of the drive module and a ground terminal and comprises a closed spark gap or a ground resistor. A second lightning protection circuit is connected between an output end of the drive module and the other ground terminal and comprises a discharge tube or the ground resistor. By the buried sewage treatment equipment, at least one of performances, such as safety, anti-interference performance and controllability, of a power supply system is improved.
Description
Technical field
The present invention relates to sewage disposal technology, relate in particular to power supply system and the affiliated facility thereof of buried sewage treatment equipment wind machine room.
Background technique
Buried sewage treatment equipment is a kind of taking biomembrane as purifying the sewage biological treatment system of main body, give full play to that the biological density that the biofilm reactor such as anaerobic biofilter, catalytic oxidation bed has is large, durability against pollution is strong, power consumption is low, operate feature stable, easy to maintenance, thereby there is very wide application prospect and promotional value.
Typical buried sewage treatment equipment comprises grille well, regulating tank, initial precipitating tank, power oxidation contact chamber, the clarifier connecting successively and the wind machine room being connected with power oxidation contact chamber; Power oxidation contact chamber wherein comprises reactor body, reactor inner casing, rotary-cuting type stirrer; Reactor inner casing is arranged on reactor body inside, and its bottom opening is communicated with reactor body; Described rotary-cuting type stirrer runs through reactor body and the setting of reactor inner casing; The inner aeration zone that forms of reactor inner casing, the top, space between reactor inner casing outer wall and reactor body inwall forms catchment, and below forms sludge settling district; Reactor body bottom is provided with aeration tube.Wherein, filling nanoparticle suspension bio-carrier in aeration zone, microbial film on nanoparticle suspension bio-carrier and activated sludge can utilize C, N, the P growth and breeding in sewage, pollutant in water body and water eutrophication substance digestion are absorbed, the rotary-cuting type stirrer simultaneously arranging can effectively assist aeration tube to carry out aeration work, the most at last pollutant removal in sewage; After muddy water in sewage enters sludge settling district mud-water separation, mud can be got back to aeration zone automatically, and the water after purification is further removed suspended matter after entering clarifier by catchment, enters afterwards sterilization pool, after up to standard, be discharged into receiving water body or make depth treatment.
In buried sewage treatment equipment, the blower fan in wind machine room is the power resources of whole sewage disposal device, must keep it to move normally.In the power supply system of wind machine room, connect as the blower fan of load equipment the module of overdriving and be connected to the output terminal as power supply unit (as civil power, solar generator, wind-driven generator), Ac power supply unit being provided by this driver module is converted to the required Ac of load equipment or direct current, reaches thus the control to load equipment.
The upper Shortcomings of above-mentioned wind machine room power supply system design: the one, Lighting Protection Measures is good not, in the time that lightning current is too powerful, may there is fraction lightning current to enter into load equipment, cause thus load equipment to damage under thunder-strike current residual voltage is impacted, this makes security of system poor, has shortened widely its working life; The 2nd, interference protection measure is not ideal enough, and load equipment easily suffers the interference of the factor such as power supply and external environment condition, and this stable operation on load equipment causes larger impact; The 3rd, it is convenient not to control, and it controls the adjustment underaction of parameter, can not meet well user's demand.In view of this, be necessary to relate to power supply system and the subsystem thereof of new buried sewage treatment equipment, to its performance is improved.
Summary of the invention
The defect existing for prior art, the object of the present invention is to provide buried sewage treatment equipment wind machine room power supply system and affiliated facility thereof, so as at least can Security, anti-interference or can be handling etc. some aspect the performance of power supply system is improved.
For solving above technical problem, the invention provides a kind of buried sewage treatment equipment, comprise grille well, regulating tank, initial precipitating tank, power oxidation contact chamber, the clarifier connecting successively and the wind machine room being connected with power oxidation contact chamber; The machine room body of described wind machine room disposes electric closet and connects the blower fan system of steam line, two above blower fans for aeration that described blower fan system setting can alternate run; Described blower fan is connected to power supply unit as load equipment by driver module, and the Ac that this driver module provides power supply unit is converted to the required Ac of described load equipment or direct current; Between described power supply unit and described driver module, be all connected by conjunction cable between described driver module and described load equipment, be provided with at least one heart yearn in the external protection of described conjunction cable, described heart yearn is enclosed with inner protective layer; The input stage of described driver module is connected to the filtering decoupling circuit suppressing from the DM EMI of described power supply unit; between the input end of described driver module and grounding end, be connected to the first lightning protection circuit that comprises sealed mode spark gap or earth resistance, between the output terminal of described driver module and grounding end, be connected to the second lightning protection circuit that comprises electric discharge lamp or earth resistance.
Compared with prior art, the present invention can improve the performance of power supply system effectively, and it at least can obtain the advantage of following some aspects:
1, Security improves.Be provided with secondary lightning protection, most of thunder-strike current is wherein released by the first order earth element of driver module input end; And driver module output terminal arranges second level earth element, the residual voltage that makes to enter load is less, is conducive to prevent that load is struck by lightning, and improves its safety in utilization, extends its working life.
2, strong interference immunity.Be mainly manifested in several aspects:
(1) shielded cable passes through earth element ground connection by one end cable shield of power supply unit, shielded cable is by the direct ground connection of the other end cable shield of load equipment, it has kept the good anti-jamming effectiveness of 2 ground connection of tradition, also limit the size of terrestrial current or interference simultaneously, can avoid terrestrial current or disturb the danger of burning shield layer of shielded cable when excessive.
(2) heart yearn of shielded cable has all designed heart yearn screen layer, is conducive to the electromagnetic radiation, electrostatic coupling and the electromagnetic induction that suppress to produce between heart yearn; Also designed cable shield, be conducive to the electromagnetic interference that suppresses outside simultaneously; This two aspects factor, has eliminated the interference that power supply system shielded cable produces preferably, is conducive to ensure the accuracy of data.
(3) input stage of driver module is provided with filtering decoupling circuit, it is as the preposition simulation low-pass filter of alternating signal input channel, have jamproof effect concurrently, can suppress to come the DM EMI of Self Powered Device, the accuracy of proof load device data transmission.
3, can be handling better.By the output mode of microcontroller circuit control driver module, be conducive to neatly by pre-provisioning request output voltage, thereby meet the demand of different user.For electric machinery load equipment, can, according to the setting signal of man-machine interface circuit, carry out stepless frequency conversion control to motor.
Brief description of the drawings
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skill in the art.Accompanying drawing is only for the object of preferred implementation is shown, and do not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is the schematic diagram of embodiment of the present invention buried sewage treatment equipment wind machine room;
Fig. 2 is the power supply system composition frame chart of buried sewage disposal device wind machine room as shown in Figure 1;
Fig. 3 is the type of grounding of shielded cable in Fig. 2;
Fig. 4 is the structural drawing of shielded cable in Fig. 2;
Fig. 5 is the composition frame chart of driver module in Fig. 2;
Fig. 6 is the example of partial circuit in driver module shown in Fig. 5.
Embodiment
A lot of details are set forth in the following description so that fully understand the present invention.But the present invention can implement to be much different from alternate manner described here, and those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that, and therefore the present invention is not subject to the restriction of following public specific embodiment.
Referring to Fig. 1, it is the schematic diagram of buried sewage treatment equipment wind machine room.This buried sewage treatment equipment wind machine room comprises machine room body 101: machine room body 101 is spliced by colour steel sandwiched plate, simple in structure, and easy disassembly, cost of production are low; Stress frame is made up of shaped steel, and structural strength is high; On machine room body 101, establish venetian blind, ventilate, heat dispersion is good; Roofing sloping face, prevents that rainwater from flowing in machine room.
As shown in Figure 1, machine room body 101 arranges electric closet 102 and blower fan system, and this blower fan system connects steam line (being generally rigid polyvinyl chloride material makes) 106; Blower fan system setting can alternate run two above blower fans 103 for aeration, the driver module of this blower fan system is connected to solar generator 104, wind-driven generator 105 and civil power, can according to circumstances be powered by different supply terminals equipment, help avoid blackout.
Above-mentioned buried sewage treatment equipment wind machine room is provided with good lightning protection and interference protection measure, and handling very good, is described as follows.
Referring to Fig. 2, represent the preferred embodiment of power supply system of the present invention.This power supply system comprises load equipment (as electric closet 102, blower fan 103 etc.) 3, between it and power supply unit (comprise solar generator 104, wind-driven generator 105,, civil power and power switching device etc.) 1, be provided with driver module 2, wherein between power supply unit 1 and driver module 2, be all connected by conjunction cable between driver module 2 and load equipment 3.
In the present embodiment, power supply unit 1 is AC power supply device, as common civil power 220V or 380V; Driver module 2 is AD-CD (AC-DC) driver module, also can be AC-AC driver module; Conjunction cable is shielded cable 4, and it is connected to lightning protection circuit, to lightning current is introduced to the earth, improves thus the Security of system.Especially, in the present embodiment.In order to make lightning current secure flows mistake, between each component, all connect by shielded cable 4, its terminal are screwed.
The lightning protection circuit of the present embodiment comprises secondary lightning protection circuit, specifically two-stage earth element 5, preferably: first order earth element 5 is sealed mode spark gap, be connected between the input end and grounding end of driver module 2, the lightning current of can releasing can reach 20KA; Second level earth element 5 electric discharge lamps, are connected between the output terminal and grounding end of driver module 2, and the fraction thunder-strike current of the driver module 2 of flowing through is further discharged, and remake current limliting one time to entering the residual voltage of load equipment 3, make it lower than specified safety range.This just can make most of thunder-strike current release by the first order earth element 5 of driver module 2 input ends, the residual voltage that the second level earth element 5 of driver module 2 output terminal settings can make to enter load is less, thereby be conducive to prevent that load is struck by lightning, improve its safety in utilization, extend its working life.
Above-mentioned first order earth element 5, the earth resistance that second level earth element 5 all can be selected Zinc-oxide piezoresistor or other type replace, and have equally good lightning protection effect.In the time that lightning current is larger, Zinc-oxide piezoresistor is breakdown, and lightning current flows into grounding end through Zinc-oxide piezoresistor rapidly, and the residual voltage that enters load equipment 3 is clamped in prespecified range.
Owing to being provided with secondary lightning protection, carry out most of thunder-strike current of Self Powered Device 1 circuit transmission line and release by first order earth element 5, and that second level earth element 5 makes to enter the residual voltage of load equipment 3 being less.This is conducive to prevent that load is struck by lightning, and improves safety in utilization, extends its working life.
As mentioned above, between power supply unit 1 and driver module 2, be all connected by shielded cable 4 between driver module 2 and load equipment 3, the screen layer of shielded cable 4 wherein is all connected to ground, below further illustrates.
Referring to Fig. 3, represent the type of grounding of shielded cable 4.Load equipment 3 is connected with power supply unit 1 by shielded cable 4, this shielded cable 4 is made up of cable core and cable shield, this cable shield wraps cable core to reduce electromagnetic interference, wherein: shielded cable 4 passes through earth element 5 ground connection near one end cable shield of power supply unit 1, and shielded cable 4 is near the direct ground connection of the other end cable shield of load equipment.
In practical power systems, the length of shielded cable 4 is generally greater than 20m, therefore can make earth element 5 be connected to apart from the position of power supply unit 4m～6m.This earth element 5 can be earth resistance, and particular type can be (certainly also can be other element) such as Zinc-oxide piezoresistors.The resistance of this earth resistance equates with the equivalent resistance of the cable shield of shielded cable 4, also can choose separately according to actual conditions.
Shielded cable 4 between this embodiment's load equipment 3 and power supply unit 1 has adopted 2 grounding schemes, thereby has still kept the good anti-jamming effectiveness of 2 grounding schemes of tradition; Because shielded cable 4 passes through earth element ground connection near one end cable shield of power supply unit 1, be conducive to earth current or disturb current limliting, avoid thus terrestrial current or disturbed the danger of burning screen layer when excessive, also can reach electromagnetic compatibility effect preferably, and can not cause negative antenna effect simultaneously.
Referring to Fig. 4, represent the concrete structure of shielded cable.In the external protection 41 of this shielded cable 4, be provided with many heart yearns 45, wherein every heart yearn is enclosed with inner protective layer 43; Especially, in external protection, 41 layers are provided with cable shield 42, and the inner side of inner protective layer 43 is provided with heart yearn screen layer 44.
Because heart yearn and the cable self of shielded cable 4 all arrange screen layer, can suppress interference and extraneous interference between heart yearn, particularly: the heart yearn of shielded cable has all designed heart yearn screen layer, be conducive to the electromagnetic radiation, electrostatic coupling and the electromagnetic induction that suppress to produce between heart yearn; Self arranges cable shield cable, is conducive to the electromagnetic interference that suppresses outside; This two aspects factor, has eliminated the interference that power supply system shielded cable produces preferably, is conducive to ensure the accuracy of data.
Preferably, the two ends of cable shield 42 and heart yearn screen layer 44 are ground connection respectively, to effectively reduce distrubance source.More preferably, be make cable shield 42 and heart yearn screen layer 44 near one end of power supply unit 1 by earth element 5 ground connection, cable shield 42 and or heart yearn screen layer 44 near the direct ground connection in one end of load equipment 3.
The power supply system of the embodiment of the present invention has filtering decoupling formula anti-interference function, below describes.
Referring to Fig. 5, it is the preferred embodiment of driver module.This power supply system comprises load equipment 3, and it is connected to the output terminal of power supply unit 1 by driver module 2, is converted to the required Ac of load equipment 3 or direct current in order to the Ac that power supply unit 1 is provided; Especially, the input stage of this driver module 2 is provided with filtering decoupling circuit 20, it is preferably RC filtering decoupling circuit, formed by the current-limiting resistance R being connected in series and filter capacitor C, make thus the output plus terminal of power supply unit and current-limiting resistance R and the filter capacitor C that output ground termination enters to be connected in series, can suppress to come the DM EMI of Self Powered Device 1, the accuracy of proof load equipment 3 data transmission.
Filtering decoupling circuit 20 in the present embodiment is RC filtering decoupling circuit, and it,, as the preposition simulation low-pass filter of alternating signal input channel, has jamproof effect concurrently; Between two terminals of alternating direct-current signal input channel, access decoupling capacitance, can be high frequency differential mode undesired signal bypass is provided.Be in passing with pointing out, consider from anti-interference angle, RC wave filter is better than LC wave filter: RC wave filter is dissipation type wave filter, noise energy can be become to thermal energy consumption and dissipate; LC wave filter can produce additional magnetic interference, thereby inductance will add radome.
Driver module 2 in above-described embodiment can be optimized, the driver module 2 of this example comprises the parts such as rectification circuit 21, power factor Circuit tuning 22, eliminator 23, inverter circuit 24 and microcontroller circuit 25, man-machine interface circuit 26 successively, wherein: rectification circuit 21 forms (being preferably full bridge rectifier) by commutation diode or bridge heap, comprise necessary interference filtering circuit, its major function is that Ac is converted to direct current; Circuit of power factor correction 22 is selectable unit (SU), be made up of power semiconductor and control chip, it is also connected to the Active PFC end of microcontroller circuit 25, and effect is that input current is approached is sinusoidal wave, reduce mains by harmonics content, realize the object that improves power factor; Eliminator 23 (being preferably RC eliminator) is mainly made up of elements such as electrochemical capacitors, completes galvanic filtering and energy storage effect; Inverter circuit 24 is made up of power model and drive circuit, and power model can be Intelligent Power Module, and it is also connected to the driving signal end of described microcontroller circuit, and its major function is, completes the conversion of direct current to threephase AC, realizes frequency modulation and voltage modulation object; Microcontroller circuit 25 is made up of microprocessor (DSP) and peripheral circuit; the order that it is sent according to man-machine interface circuit 26; send corresponding command signal; power ratio control factor correcting circuit 22 and inverter circuit 24 are worked; and according to circuit feedback information, carry out necessary circuit protection and fault treatment.Like this, this embodiment is by the output mode of microcontroller circuit control driver module, is conducive to neatly by pre-provisioning request output voltage, thereby meets the demand of different user.
Referring to Fig. 6, be the embodiment of part circuit structure in driver module.Specifically for the inverter circuit of motor 31 and the example of microcontroller circuit of blower fan, its working method is: civil power becomes direct current through rectification circuit 21, after electrochemical capacitor filtering, the two ends of the DC electrical source 241 of access inverter circuit 24, access filter capacitor between the two ends of this DC electrical source 241.And the microprocessor of microcontroller circuit 25 (MCU/DSP) 251 is according to the setting signal of man-machine interface circuit 26, the motor 31 of load equipment 3 is controlled.
In the present embodiment, inverter circuit 24 comprises power pipe driving chip 242, this power pipe driving chip 242 is connected to the microprocessor (MCU/DSP) 251 of microcontroller circuit 25, so that the pulse width modulating signal of exporting according to microprocessor 251, drives corresponding power tube alternate conduction and shutoff.Concrete, described inverter circuit 24 comprises six power tube S1～S6, these six power tubes are divided into three groups, a phase winding of every group power control three phase electric machine 31.
The concrete Placement of each power tube is: the source electrode of power tube S1, S2, S3 connects one end of DC electrical source 241 jointly, the drain electrode of power tube S4, S5, S6 connects the other end of DC electrical source 241 jointly, the tie point of the source electrode of the drain electrode of power tube S1 and power tube S4 connects the U phase terminal of motor, the tie point of the source electrode of the drain electrode of power tube S2 and power tube S5 connects the V phase terminal of motor, and the source electrode tie point of the drain electrode of power tube S3 and power tube S6 connects the W phase terminal of motor; Power tube, the grid of power tube S1, S2, S3, S4, S5, S6 connects respectively an output terminal of power pipe driving chip 242, and each input end of this power pipe driving chip 242 is controlled by output pulse width regulated signal PWM1, PWM2, PWM3, PWM4, PWM5, PWM6 Zhong mono-tunnel of microprocessor 251 respectively.
When start, microprocessor 251 produces corresponding 6 road pulse width modulating signals according to the motor speed of setting, and drives signal PWM1～PWM6; Drive 6 power tubes (MOSFET or IGBT) S1～S6 by power pipe driving chip 242; The alternate conduction of these power tubes and shutoff, produce three-phase modulations waveform, and output voltage is adjustable, the threephase AC of changeable frequency, outputs to U, V, the W terminal of motor 31, thereby realizes the stepless frequency control of motor 31.
Below be only the preferred embodiment of the present invention, it should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a buried sewage treatment equipment, comprise grille well, regulating tank, initial precipitating tank, power oxidation contact chamber, the clarifier connecting successively and the wind machine room being connected with power oxidation contact chamber, it is characterized in that, the machine room body of described wind machine room disposes electric closet and connects the blower fan system of steam line, two above blower fans for aeration that described blower fan system setting can alternate run; Described blower fan is connected to power supply unit as load equipment by driver module, and the Ac that this driver module provides power supply unit is converted to the required Ac of described load equipment or direct current; Between described power supply unit and described driver module, be all connected by conjunction cable between described driver module and described load equipment, be provided with at least one heart yearn in the external protection of described conjunction cable, described heart yearn is enclosed with inner protective layer; The input stage of described driver module is connected to the filtering decoupling circuit suppressing from the DM EMI of described power supply unit; between the input end of described driver module and grounding end, be connected to the first lightning protection circuit that comprises sealed mode spark gap or earth resistance, between the output terminal of described driver module and grounding end, be connected to the second lightning protection circuit that comprises electric discharge lamp or earth resistance.
2. buried sewage treatment equipment as claimed in claim 1, is characterized in that, machine room body is spliced by colour steel sandwiched plate, and machine room body stress frame is made up of shaped steel; On machine room body, establish venetian blind, the roofing sloping face of machine room body.
3. buried sewage treatment equipment as claimed in claim 1, is characterized in that, described power supply unit comprises solar generator, wind-driven generator, civil power and power switching device.
4. buried sewage treatment equipment as claimed in claim 1, is characterized in that, the output plus terminal of described power supply unit and output ground termination enter current-limiting resistance and the filter capacitor of serial connection, to form RC filtering decoupling circuit.
5. buried sewage treatment equipment as claimed in claim 1, it is characterized in that, described driver module comprises successively for Ac being converted to galvanic rectification circuit, for realizing the eliminator of galvanic filtering and energy storage effect and realizing the inverter circuit of frequency modulation and voltage modulation for completing direct current to Ac conversion.
6. buried sewage treatment equipment as claimed in claim 5, is characterized in that, described driver module comprises power factor Circuit tuning, and described power factor Circuit tuning is arranged between described rectification circuit and described eliminator.
7. buried sewage treatment equipment as claimed in claim 6, it is characterized in that, described driver module comprises microcontroller circuit, described power factor Circuit tuning is connected to the Active PFC end of described microcontroller circuit, and described inverter circuit is connected to the driving signal end of described microcontroller circuit.
8. buried sewage treatment equipment as claimed in claim 7, is characterized in that, described drive module setting has man-machine interface circuit, and described man-machine interface circuit is connected to the input end of described microcontroller circuit.
9. buried sewage treatment equipment as claimed in claim 1; it is characterized in that; described conjunction cable is shielded cable, and the inner side of the external protection of described shielded cable is provided with cable shield, and the inner side of the inner protective layer of described shielded cable is provided with heart yearn screen layer.
10. buried sewage treatment equipment as claimed in claim 9, it is characterized in that, described shielded cable passes through earth element ground connection near cable shield described in one end of described power supply unit and described heart yearn screen layer, and described shielded cable is near cable shield described in the other end of described load equipment and the direct ground connection of described heart yearn screen layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353032.XA CN104100556A (en) | 2014-07-22 | 2014-07-22 | Buried sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353032.XA CN104100556A (en) | 2014-07-22 | 2014-07-22 | Buried sewage treatment equipment |
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| CN104100556A true CN104100556A (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410353032.XA Pending CN104100556A (en) | 2014-07-22 | 2014-07-22 | Buried sewage treatment equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836323A (en) * | 2015-05-20 | 2015-08-12 | 鲁霄钢 | Buried sewage treatment equipment |
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| KR100966378B1 (en) * | 2010-03-25 | 2010-06-28 | 주식회사 가나오엠 | Apparatus for disposing sewage and wastewater |
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| CN102838256A (en) * | 2012-08-23 | 2012-12-26 | 吕晓娟 | Buried sewage treatment system |
| CN202772882U (en) * | 2012-04-06 | 2013-03-06 | 四川省送变电建设有限责任公司 | Shielding-type anti-interference electric power secondary system |
| CN202872648U (en) * | 2012-04-06 | 2013-04-10 | 四川省送变电建设有限责任公司 | Filter decoupling anti-interference electric power secondary system |
| CN203978883U (en) * | 2014-07-22 | 2014-12-03 | 诸暨市沃思环保技术有限公司 | Buried sewage treatment equipment |
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- 2014-07-22 CN CN201410353032.XA patent/CN104100556A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100966378B1 (en) * | 2010-03-25 | 2010-06-28 | 주식회사 가나오엠 | Apparatus for disposing sewage and wastewater |
| CN202602264U (en) * | 2012-04-06 | 2012-12-12 | 四川省送变电建设有限责任公司 | Anti-interference microcomputer protective relaying device |
| CN202633928U (en) * | 2012-04-06 | 2012-12-26 | 四川省送变电建设有限责任公司 | Lightning protection power secondary system |
| CN202772882U (en) * | 2012-04-06 | 2013-03-06 | 四川省送变电建设有限责任公司 | Shielding-type anti-interference electric power secondary system |
| CN202872648U (en) * | 2012-04-06 | 2013-04-10 | 四川省送变电建设有限责任公司 | Filter decoupling anti-interference electric power secondary system |
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| CN203978883U (en) * | 2014-07-22 | 2014-12-03 | 诸暨市沃思环保技术有限公司 | Buried sewage treatment equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104836323A (en) * | 2015-05-20 | 2015-08-12 | 鲁霄钢 | Buried sewage treatment equipment |
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