CN206266403U - One kind freezing and ultrasonic combined deep dehydration processing system - Google Patents
One kind freezing and ultrasonic combined deep dehydration processing system Download PDFInfo
- Publication number
- CN206266403U CN206266403U CN201621134592.7U CN201621134592U CN206266403U CN 206266403 U CN206266403 U CN 206266403U CN 201621134592 U CN201621134592 U CN 201621134592U CN 206266403 U CN206266403 U CN 206266403U
- Authority
- CN
- China
- Prior art keywords
- sludge
- freeze
- ultrasonic
- processing system
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The utility model is related to a kind of freezing and ultrasonic combined deep dehydration processing system, it is characterised in that including primary sludge-tank, ultrasonic pretreatment unit, sludge dewatering treatment unit, sludge freeze-thaw unit and mud cake processing unit；Wherein, the ultrasonic pretreatment unit includes ultrasonic wave conditioner, and the sludge dewatering treatment unit includes at least one centrifugal dewatering of sludge machine and at least one high pressure plate and frame filter press；The sludge freeze-thaw unit includes at least one sludge freeze-thaw room, and the sludge of the primary sludge-tank output sequentially enters ultrasonic wave conditioner, at least one centrifugal dewatering of sludge machine, at least one sludge freeze-thaw room, at least one high pressure plate and frame filter press and mud cake processing unit and obtains the sludge that dewater treatment is finished.The dehydration property and settleability of sludge are optionally added on a small quantity or improved in the case of being reduced to medicament dependence without flocculant to the dewater treatment system；And treatment sludge effect is good, the cost time is rationally, pollution-free.
Description
Technical field
The utility model is related to a kind of freezing and ultrasonic combined deep dehydration processing system, belongs to sludge in wastewater treatment
Processing technology field.
Background technology
Sludge is the accessory substance of formation in biochemical processing procedure of sewage.Not only moisture content, content of organics are high for usual sludge,
Also contain a large amount of pathogens, parasite simultaneously, and other such as heavy metal difficult degradations poisonous and harmful substance, therefore deal carefully with
Sludge is always the research topic that countries in the world today is extremely paid close attention to.Traditional mud dewatering method be by add flocculant,
Filter aid is nursed one's health, and then carries out mechanical dehydration by filter press or centrifugal dehydrator, then carries out desiccation, carbonization etc., finally
Burned, or outward transport landfill, fertilizer processed etc..Filter aid, such as inorganic salts filter aid are now used, mainly electrolyte substance is in water
Ionize out a large amount of ions after dissociation, ion can be neutralized and be diffused in powered particle in water, charged particle and same polarity hydrone
Suction-operated is stronger, and also just corresponding more difficult during dehydration, due to losing electrically, the active force of same polarity molecule just weakens particle
, dehydration becomes easier to.Even if the consumption that different filter aids, flocculant need can be different, added amount of chemical also leads to
Often measured by mud dry weight percentage.Therefore the input increased operating cost of one side of medicament, while medicament can be remained in
In sludge, increase the mud handling capacity of subsequent handling.On the other hand, the dispensing of medicament is easier to have influence on the physicochemical property of sludge,
So as to influence the recycling of follow-up sludge.Therefore the use of medicament should rationally be any limitation as, and optimize technique as far as possible, so that
Sludge treatment is allowed to reach balance in resource and minimizing.
Also known as freeze thawing, in sludge refrigerating process, mud granule gradually pushes contraction concentration to Refrigeration Technique, and the moisture of sludge
Then to freezing Interface Moving.Due to quickly forming for frozen coating, some mud granule hampers the flowing of water, thus new
Freezing interface freeze again so that the mud granule after concentration is closed in the middle of frozen coating, concentration sewage sludge solid layer in
Moisture is dehydrated due to gravitation.After freeze-thaw, colloidal nature is destroyed completely, and mud granule is able to rapid aggegation sedimentation.Freeze
Mix together and cause cell rupture so that the dehydration property and settleability of sludge are greatly improved.Due to need to generally be carried out to sludge
Multiple freezing and defrosting, therefore the consumption of the energy, time of the process is larger, and if moisture percentage in sewage sludge is excessive, due to water
Specific heat capacity is very big, and compared with the low sludge of moisture content, energy consumption and time loss are also further increased.
Ultrasonication can change and destroy the flocculation structure of sludge, and the ultrasonic wave of appropriate power can make zoogloea
There is significant change in matter, be a kind of effective sludge pre-treatment techniques so as to improve the dehydration property and settleability of sludge.
Utility model content
For above-mentioned deficiency, the purpose of this utility model is to provide a kind of freezing, the treatment of ultrasonic combined deep dehydration
System, the system has treatment sludge effect good, processing cost, time rationally, the features such as non-environmental-pollution.
To achieve the above object, the technical solution adopted in the utility model is as follows：
One kind freezing and ultrasonic combined deep dehydration processing system, it is characterised in that including primary sludge-tank, ultrasonic wave
Pretreatment unit, sludge dewatering treatment unit, sludge freeze-thaw unit and mud cake processing unit；Wherein, the ultrasonic wave is pre-
Processing unit includes ultrasonic wave conditioner, and the sludge dewatering treatment unit is including at least one centrifugal dewatering of sludge machine and at least
One high pressure plate and frame filter press, the sludge freeze-thaw unit includes at least one sludge freeze-thaw room；The primary dirt
The sludge of mud sump output sequentially enters ultrasonic wave conditioner, at least one centrifugal dewatering of sludge machine, at least one sludge freezing and melts
Solution room, at least one high pressure plate and frame filter press and mud cake processing unit obtain the sludge that dewater treatment is finished.
By such scheme, it is preferable that when at least one quantity of centrifugal dewatering of sludge machine is two or more, institute
Two or more centrifugal dewatering of sludge machines are stated to be set up in parallel；When at least one sludge freeze-thaw room quantity between two or
During the above, sludge freeze-thaw room is set up in parallel between described two or more；When at least one number of high pressure plate and frame filter press
Measure for two or more when, described two or more high pressure plate and frame filter press are set up in parallel.
By such scheme, it is preferable that the ultrasonic pretreatment unit also includes being arranged in the ultrasonic wave conditioner
Agitator.The scope of the adjustable stir speed (S.S.) of the agitator is 0-80r/min, and the ultrasonic wave conditioner is adjustable super
Frequency of sound wave scope is 20-30KHz, and ultrasonic density scope is 0.1-1W/mL.
By such scheme, it is preferable that be additionally provided with multiple temperature measuring equipments in the ultrasonic wave conditioner, can monitor interior
The sludge temperature of portion's different zones
By such scheme, it is preferable that the adjustable temperature range of sludge freeze-thaw unit is -30 DEG C~40 DEG C,
Multiple temperature measuring equipments are provided with least one sludge freeze-thaw room, the sludge temperature of internal different zones can be monitored
Degree.
By such scheme, it is preferable that the mud cake processing unit includes mixing crusher and dewatered sludge storehouse, the mixing
The sludge inlet of disintegrating machine is connected with the sludge discharge hole of an at least high pressure plate and frame filter press, the mixing crusher
Sludge discharge hole be connected with the sludge inlet in the dewatered sludge storehouse.
By such scheme, it is preferable that the freezing and ultrasonic combined deep dehydration processing system are also reclaimed including filtrate
Unit, the filtrate recovery unit includes filtrate collecting-tank and filtrate reflux pump, by least one centrifugal dewatering of sludge machine and extremely
The filtrate that a few high pressure plate and frame filter press is produced enters to filtrate collecting-tank, and the filtrate of filtrate collecting-tank output is again through filtering
Liquid reflux pump is delivered to Sewage Plant.
By such scheme, it is preferable that the primary sludge-tank, ultrasonic wave conditioner, freeze/melt room, dewatered sludge storehouse
Or it is provided with Weighing module in one or more devices in filtrate collecting-tank；The effect of the Weighing module is to understand in real time
Internal sludge weight.
By such scheme, it is preferable that the ultrasonic pretreatment unit is also included for dosing to ultrasonic wave conditioner
Chemicals dosing plant.
By such scheme, it is highly preferred that the chemicals dosing plant includes flocculant medicinal cupping and flocculant control valve, the flocculation
The discharging opening of agent medicinal cupping is connected with the charge door of ultrasonic wave conditioner, and Weighing module is provided with the flocculant medicinal cupping；The wadding
The effect of solidifying agent control valve is control flocculant concentration speed, and the effect of the Weighing module is to understand internal drug weight in real time
Amount.
The utility model principle is as follows：
The utility model employs ultrasonic technology first, using cavitation, the i.e. liquid using ultrasonic wave in sludge
Body is propagated, so that liquid particle high vibration, cavity is produced in liquid internal, the rapid of cavity swells and close, lead
Clashing between cause particulate, so that water and fry dried food ingredients lactogenesis, to destroy cell membrane, while can be according to sludge quality and work
Skill needs, and the addition of selectivity is a small amount of or without flocculant, with reduce to greatest extent medicament is relied in the case of improve dirty
The dehydration property and settleability of mud.Sludge will be entered by centrifugal dewatering of sludge machine by the sludge after ultrasonication to a certain degree
Row preliminary hydro-extraction works.Sludge colloidal nature will be destroyed using Refrigeration Technique by the sludge of preliminary hydro-extraction, mud granule is obtained
Settled with rapid aggegation.The organic substance and ion in sludge have impact on the refrigerating process and effect of sludge simultaneously, with further
Destruction cell membrane, so as to not use any medicament or improve sludge in the case of using medicament as few as possible to greatest extent
Dehydration property and settleability.
It is foregoing using such dewaterer the reason for be：Because the follow-up filter cake for using plate compression, generation needs further
Broken, on the other hand, if not carrying out preliminary hydro-extraction, because moisture percentage in sewage sludge is excessive, and the specific heat capacity of water is very big, follow-up coolerman
Energy consumption and space needed for skill is bigger, and compared with the low sludge of moisture content, the energy consumption and time loss of integrated artistic can substantially increase
Greatly, therefore from technique integrally consider, the process of centrifugal dehydration need to be increased.By test of many times, the sludge is finally by hardboard
The filter cake generated after frame filter press can reach gratifying moisture content.
The utility model compared with prior art, with advantages below：
1st, the utility model provide freezing and ultrasonic combined deep dehydration processing system can according to sludge quality with
Technique needs, and the addition of selectivity is a small amount of or without flocculant, with reduce to greatest extent medicament is relied in the case of improve
The dehydration property and settleability of sludge.
2nd, the freezing and ultrasonic combined deep dehydration processing system treatment sludge effect that the utility model is provided are good, treatment
Cost, time rationally, the features such as non-environmental-pollution.
Brief description of the drawings
Fig. 1 show the freezing of the utility model embodiment offer and the structure of ultrasonic combined deep dehydration processing system
Schematic diagram.
1st, primary sludge-tank, the 2, first conveying worm, 3, ultrasonic wave conditioner, the 4, second conveying worm, 5, stirring
Device, 6, centrifugal dewatering of sludge machine, the 7, the 3rd conveying worm, 8, sludge freeze-thaw room, the 9, the 4th conveying worm, 10, filter
Liquid collecting-tank, 11, filtrate reflux pump, the 12, first belt conveyor, 13, high pressure plate and frame filter press, 14, mixing crusher, 15,
Second belt conveyor, 16, dewatered sludge storehouse, the 17, the 3rd belt conveyor, 18, delivery system, 19, flocculant medicinal cupping, 20,
Flocculant controls valve.
Specific embodiment
With reference to embodiment and accompanying drawing, further description, but reality of the present utility model are made to the utility model
The mode of applying is not limited only to this.
Embodiment
The freezing provided with reference to such as Fig. 1, the present embodiment and ultrasonic combined deep dehydration processing system mainly include primary
Sludge-tank 1, ultrasonic pretreatment unit, sludge dewatering treatment unit, sludge freeze-thaw unit, mud cake processing unit and filtrate
Recovery unit；Wherein, the ultrasonic pretreatment unit includes ultrasonic wave conditioner 3, and the sludge dewatering treatment unit includes
One centrifugal dewatering of sludge machine 6 and a high pressure plate and frame filter press 13, the sludge freeze-thaw unit include that a sludge is cold
Freeze thawing solution room 8, the mud cake processing unit includes mixing crusher 14 and dewatered sludge storehouse 16, and the filtrate recovery unit includes
Filtrate collecting-tank 10 and filtrate reflux pump 11.
The sludge exported by primary sludge-tank 1 sequentially enters ultrasonic wave conditioner 3, the freezing of centrifugal dewatering of sludge machine 6, mud and melts
Solution room 8, high pressure plate and frame filter press 13, mixing crusher 14 and dewatered sludge storehouse 16 obtain the sludge that dewater treatment is finished.
The filtrate produced by centrifugal dewatering of sludge machine 6 and high pressure plate and frame filter press 13 enters to filtrate collecting-tank 10, filter
The filtrate of the output of liquid collecting-tank 10 is delivered to Sewage Plant through filtered fluid reflux pump 11 again.
Further, the ultrasonic pretreatment unit also includes the chemicals dosing plant for dosing to ultrasonic wave conditioner 3,
Can be according to sludge quality, selectivity addition proper amount of medication.The chemicals dosing plant includes flocculant medicinal cupping 19 and flocculant control valve
20, the discharging opening of flocculant medicinal cupping 19 is connected with the charge door of ultrasonic wave conditioner 3, and mould of weighing is provided with flocculant medicinal cupping 19
Block, can in real time understand the weight of internal drug.
Further, it is provided with the ultrasonic wave conditioner 3 and puts agitator 5, can adjust stir speed (S.S.)；The ultrasonic wave is adjusted
Reason pond 3 can adjust internal ultrasonic Bomi degree, and being additionally provided with multiple temperature measuring equipments in the ultrasonic wave conditioner 3 can monitor inside
The sludge temperature of different zones.
Further, the adjustable internal temperature of the sludge freeze-thaw unit, makes sludge temperature reach -30 DEG C~40
DEG C, and freeze/melt room 8 and be provided with multiple temperature measuring equipments and can monitor internal different zones sludge temperature；Sludge is not required to repeatedly
Freeze and melt alternately and repeatedly, only need to once freeze and melt；Sludge freeze-thaw room 8 can complete to freeze and melt two simultaneously
Process.
Further, described all kinds of storehouses, room, tank are primary sludge-tank 1, sludge freeze-thaw room 8, ultrasonic wave conditioner
3rd, filtrate collecting-tank 10, dewatered sludge storehouse 16 are equipped with Weighing module, can in real time understand the weight of internal tie substance.
Referring to Fig. 1, freezing and the sludge dehydration process of ultrasonic combined deep dehydration processing system that the present embodiment is provided
It is specific as follows：
1) sludge through ultrasonic waves pretreatment stage：Sewage plant excess sludge is stored in primary sludge-tank 1, and sludge passes through in pond
First conveying worm 2 is delivered to ultrasonic wave conditioner 3, according to sludge quality, the flocculant in flocculant medicinal cupping 19 is passed through
Regulation flocculant control valve 20 is pressed in certain speed input ultrasonic wave conditioner 3, and ultrasonic wave is set into certain ultrasonic density
(ultrasonic density scope 0.1-1W/mL) and time, the agitator control device 5 in conditioner are adjusted to certain rotating speed (rotating speed model
It is 0-120r/min to enclose), medicament, sludge temperature is tried one's best uniformly；
2) the centrifugal dehydration stage：Sludge will be delivered to by pretreated sludge by the second conveying worm 4 to be centrifuged
It is dehydrated in dewaterer 6, moisture percentage in sewage sludge can be made to drop to 70%, filtrate is passed through in pipeline to filtrate collecting pit 10,
Preliminary hydro-extraction sludge is delivered to sludge freeze-thaw room 8 by the 3rd conveying worm 7 simultaneously；
3) sludge freezing stage：The temperature of sludge freeze-thaw room 8 is set to -5 DEG C~-30 DEG C, cooling time is 10-30
Hour；
4) sludge melts the stage：After freezing stage terminates, by the temperature setting of sludge freeze-thaw room 8 at 15 DEG C~40 DEG C
Melted；
5) the frame dehydration stage：Sludge after melting is delivered to high pressure sheet frame pressure by the 4th conveying worm 9
It is dehydrated in filter 13, moisture percentage in sewage sludge can be made to deteriorate to less than 50%；
6) mud cake and filtrate processing stage：The filter cake that high pressure plate and frame filter press 13 is produced will automatically fall into the first Belt Conveying
In machine 12, and sludge is delivered to by mixing crusher 14 by it；Mud cake is crushed in mixing crusher 14, as powder
Shape, dewatered sludge storehouse 16 is delivered to by the second belt conveyor 15, then is delivered to send outside by the 3rd belt conveyor 17 and is
System outward transport 18；On the other hand the filtrate that high pressure plate and frame filter press 13 is produced is delivered to filtrate collecting pit 10, is flowed back by filtrate
Pump 11 is back to Sewage Plant.
Claims (8)
1. it is a kind of to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that pre- including primary sludge-tank, ultrasonic wave
Processing unit, sludge dewatering treatment unit, sludge freeze-thaw unit and mud cake processing unit；Wherein, the ultrasonic wave is located in advance
Reason unit includes ultrasonic wave conditioner, and the sludge dewatering treatment unit includes at least one centrifugal dewatering of sludge machine and at least one
Platform high pressure plate and frame filter press, the sludge freeze-thaw unit includes at least one sludge freeze-thaw room；The primary sludge
The sludge of pond output sequentially enters ultrasonic wave conditioner, at least one centrifugal dewatering of sludge machine, at least one sludge freeze-thaw
Room, at least one high pressure plate and frame filter press and mud cake processing unit obtain the sludge that dewater treatment is finished.
2. it is according to claim 1 to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that the ultrasound
Ripple pretreatment unit also includes the agitator being arranged in the ultrasonic wave conditioner.
3. it is according to claim 1 to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that the sludge
The adjustable temperature range of freeze-thaw unit is -30 DEG C ~ 40 DEG C, is provided with least one sludge freeze-thaw room
Multiple temperature measuring equipments.
4. freezing according to claim any one of 1-3 and ultrasonic combined deep dehydration processing system, it is characterised in that
The mud cake processing unit include mixing crusher and dewatered sludge storehouse, the sludge inlet of the mixing crusher with it is described extremely
A few sludge discharge hole for high pressure plate and frame filter press is connected, the sludge discharge hole of the mixing crusher and the dewatered sludge
The sludge inlet in storehouse is connected.
5. it is according to claim 4 to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that the freezing
Also include filtrate recovery unit with ultrasonic combined deep dehydration processing system, the filtrate recovery unit includes filtrate collecting-tank
With filtrate reflux pump, entered by the filtrate of at least one centrifugal dewatering of sludge machine and at least one high pressure plate and frame filter press generation
To filtrate collecting-tank, the filtrate of filtrate collecting-tank output is delivered to Sewage Plant through filtered fluid reflux pump again.
6. it is according to claim 5 to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that described primary
One or more dresses in sludge-tank, ultrasonic wave conditioner, sludge freeze-thaw room, dewatered sludge storehouse or filtrate collecting-tank
Weighing module is provided with putting.
7. it is according to claim 4 to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that the ultrasound
Ripple pretreatment unit also includes the chemicals dosing plant for dosing to ultrasonic wave conditioner.
8. it is according to claim 7 to freeze and ultrasonic combined deep dehydration processing system, it is characterised in that the dosing
Device includes flocculant medicinal cupping and flocculant control valve, and the discharging opening of flocculant medicinal cupping connects with the charge door of ultrasonic wave conditioner
Connect, Weighing module is provided with the flocculant medicinal cupping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134592.7U CN206266403U (en) | 2016-10-18 | 2016-10-18 | One kind freezing and ultrasonic combined deep dehydration processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134592.7U CN206266403U (en) | 2016-10-18 | 2016-10-18 | One kind freezing and ultrasonic combined deep dehydration processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206266403U true CN206266403U (en) | 2017-06-20 |
Family
ID=59038733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621134592.7U Expired - Fee Related CN206266403U (en) | 2016-10-18 | 2016-10-18 | One kind freezing and ultrasonic combined deep dehydration processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206266403U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108689585A (en) * | 2018-05-25 | 2018-10-23 | 北京工业大学 | A method of recycling phosphorus from cryogenic freezing and microwave combined pretreating sludge supernatant |
| CN108947186A (en) * | 2018-10-09 | 2018-12-07 | 刘飞 | Sludge freezing equipment |
| CN114716124A (en) * | 2022-05-10 | 2022-07-08 | 江苏道科环境科技有限公司 | Freeze-thawing ultrasonic combined sludge high-dry dehydration system and method |
-
2016
- 2016-10-18 CN CN201621134592.7U patent/CN206266403U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108689585A (en) * | 2018-05-25 | 2018-10-23 | 北京工业大学 | A method of recycling phosphorus from cryogenic freezing and microwave combined pretreating sludge supernatant |
| CN108947186A (en) * | 2018-10-09 | 2018-12-07 | 刘飞 | Sludge freezing equipment |
| CN114716124A (en) * | 2022-05-10 | 2022-07-08 | 江苏道科环境科技有限公司 | Freeze-thawing ultrasonic combined sludge high-dry dehydration system and method |
| CN114716124B (en) * | 2022-05-10 | 2023-12-05 | 江苏道科环境科技有限公司 | Freeze thawing ultrasonic combined sludge high-dry dehydration system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206266403U (en) | One kind freezing and ultrasonic combined deep dehydration processing system | |
| CN102936089B (en) | Automatic control system of sludge deep dewatering overall process and treatment method | |
| CN105417912B (en) | A kind of device of dewatered sludge anaerobic dry fermentation | |
| CN111346892A (en) | Kitchen waste separation processor | |
| CN110404934A (en) | A kind of rubbish efficient process equipment | |
| CN107673516A (en) | A kind of multi-level sanitary sewage primary treatment device | |
| CN108046550A (en) | A kind of excess sludge ultrasound rotational flow, which is combined, cracks technique | |
| CN207362022U (en) | A kind of reclaiming city domestic sludge processing unit | |
| CN205999259U (en) | A kind of slurry dewatering automaton | |
| CN207986909U (en) | A kind of municipal administration sanitary sewage tertiary treatment device | |
| CN107585982A (en) | The recovery of albumen and phosphorus and reduced sugar conversion treatment device and method in municipal sludge | |
| CN207362021U (en) | A kind of excess sludge protein extraction device | |
| CN203752972U (en) | Mobile sludge and sewage treatment equipment | |
| CN105967495A (en) | Movable type sludge dehydration environment-friendly treatment device and treatment method thereof | |
| CN215756976U (en) | Sludge deep dehydration processing system | |
| CN113860678B (en) | Integrated equipment and method for rapidly treating oily sludge through multiple modules | |
| CN206173067U (en) | Abandonment drilling fluid flocculation dewatering device | |
| CN105777942B (en) | The agarose gel microsphere production system and its production technology of uniform particle diameter | |
| Wolski | The effect of ultrasonic disintegration on sewage sludge conditioning | |
| CN105358317B (en) | The high dehydration method and apparatus of the mud of saliferous residue | |
| CN212894265U (en) | Tower-type sewage circulating treatment system | |
| CN211226447U (en) | Temperature-controlled ultrasonic air floatation treatment device for northern cold regions | |
| CN205953800U (en) | Sludge concentration dehydration integration unit structure | |
| CN110922027A (en) | Sludge dewatering, deodorizing and drying device with solar panel heating | |
| CN205687784U (en) | A kind of movable type sludge dehydration environment-friendly processing unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170620 Termination date: 20211018 |