CN106988295A - The processing method and its processing equipment of sludge dewatering and solidification are carried out using ground treatments - Google Patents
The processing method and its processing equipment of sludge dewatering and solidification are carried out using ground treatments Download PDFInfo
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- CN106988295A CN106988295A CN201710170710.2A CN201710170710A CN106988295A CN 106988295 A CN106988295 A CN 106988295A CN 201710170710 A CN201710170710 A CN 201710170710A CN 106988295 A CN106988295 A CN 106988295A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of processing method that sludge dewatering and solidification are carried out using ground treatments, comprise the following steps：1) sludge is collected and pretreatment stage：Multiple filter wells are vertically arranged in processing pond, leads to the immersible pump in screened well and drainpipe and discharges the water filtered in well；2) vacuum pre-pressed joint electrical heating bleeding stage：Sludge top surface laying working cushion layer in processing pond, then sets plastic draining board system, and electrical bar is inserted into sludge；3) Soil-cement cure stage：Next injecting cement mortar into sludge using cement mixing pile makes sludge be mixed with cement mortar；4) solidification sludge digs out the stage.The present invention utilizes vacuum pre-pressed joint electrical heating draining, reduces sludge moisture content, follow-up Deep Mixing Method further reduces water content, and improves sludge intensity, solidifies harmful substance, is suitable for landfill or constructing roadbed.
Description
Technical field
The invention belongs to environmental protection technical field, further it is related to Recycle of Sludge in Wastewater Treatment Plant field, has
Body is the processing method and its processing equipment that sludge dewatering and solidification are carried out using ground treatments.
Background technology
Sewage treatment plant can produce sludge during processing sewage, and sludge moisture content is about 100%, the content of organic matter
50%-70%, mud granule is small, poor permeability.Processing for sludge follows minimizing, stabilizes, innoxious.Wherein, CJ/
T249-2007 provides that sludge moisture content is less than 60% after the processing of blended landfill, and shearing strength is more than 25kPa.For sludge
Processing is typically first concentrated and is dehydrated.Sludge is after concentration, and its moisture content is 95% or so, but still is flow fluid
Shape, often need to further be dehydrated reduction moisture content.Dewatering mainly has two kinds of nature desiccation and mechanical dehydration.In addition, there is electricity
Ooze the techniques such as dehydration, but generally existing smaller, the problems such as running cost is high for the treatment of capacity.In the stable principal degradation sludge of sludge
Smelly organic matter is easily degenerated, the quantity of liquid and solid is reduced, pathogen is reduced, stink is eliminated.Stable method has aerobic
Digestion, anaerobic digestion, Composting etc..
Compared with sludge, reclaiming land around sea formation hydraulic reclamation soil particle it is slightly larger, water content is essentially identical, content of organics compared with
It is few.A series of basement process sides such as vacuum method, electro-osmosis method, the method for mixing cement and soil into pile are formed in foundation treatment technology field
Method, is particularly suitable for the reinforcement of soft soil of large volume, and achieves success.
Different from basement process, Treatment of Sludge is not concerned with solving foundation bearing capacity and settlement issues, and Treatment of Sludge is mainly closed
Note water content reduction is sludge reduction, and soil strength needs certain growth and fixes the harmful substance in sludge, is suitable for
Landfill disposal.
Different from basement process, Treatment of Sludge is not concerned with solving foundation bearing capacity and settlement issues, is primarily upon water content
Reduction is sludge reduction, and soil strength needs certain growth and fixes the harmful substance in sludge, is suitable for after landfill etc.
Continuous processing processing.The scale of construction of Treatment of Sludge is relatively fewer, therefore insensitive for cost, can use some basement process in compared with
The higher technology of the cost used less, such as flocculant promote solidifying method, electrical heating method.Due to small, the organic matter that there is mud granule
The peculiar properties such as content height, therefore it is limited, it is necessary to will be a variety of to handle using a kind of independent method for processing foundation sludge effect
Base processing method joins together to carry out the dehydration and solidification of sludge.Therefore a kind of knockdown sludge treatment technique of design is needed,
Various basement process techniques are effectively combined, sludge dewatering and the apparatus and method of the integrated treatment of solidification is realized.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of dirty using ground treatments progress
Mud is dehydrated processing method and its processing equipment with solidification, and it is applied to the processing of sludge, realizes that the sludge dewatering of large volume is consolidated
Change is handled, and realizes the later use of sludge.
The present invention is achieved by the following technical solutions：
A kind of processing method that sludge dewatering and solidification are carried out using ground treatments, is comprised the following steps：
1) sludge is collected and pretreatment stage
Multiple filter wells are vertically arranged in processing pond, filter well is using the stainless-steel pipe punched, and steel pipe outsourcing filter cloth is stainless
Steel steel pipe bottom end closure top end opening, immersible pump, immersible pump delivery port connection row are provided with the inner bottom of stainless-steel pipe
Water pipe draws filter well；
Then sludge is inputted into processing pond, coagulant is added during sludge is inputted, fine sand is dried, to eliminate dirt
Electric charge between mud particle, accelerates particle movement and deposition, so as to promote the water in sludge to enter filter well；And open immersible pump,
Immersible pump and drainpipe in logical screened well discharge the water filtered in well；
After the collection stage terminates, stainless steel chimney filter is extracted, is that follow-up sludge soil processing is ready；
2) vacuum pre-pressed joint electrical heating bleeding stage
Then sludge top surface laying geotextiles and compression foam plate in processing pond set plastic row as working cushion layer
Water plate, and chimney filter is laid, by plastic draining board wrench and chimney filter colligation；And electrical bar is inserted into sludge, by electrical bar wire
It is connected with power supply box；
Then, laying geotextiles and diaphragm seal, processing pond pool wall, and reserved enough sedimentations are pasted by diaphragm seal surrounding
Amount；Then chimney filter and membrane device are installed, and connects jet pump；
Starting jet pump is simultaneously heated electrical bar, and jet pump is vacuumized, in level to pore water pressure pressure difference
Under effect, hole current direction plastic draining board carries out draining；Electrical bar raises sludge soil temperature degree, and its osmotic coefficient k is with temperature
Raise and become big, to accelerate the native rate of consolidation of sludge, on the other hand, because the thermal coefficient of expansion of pore water is the 15 of soil skeleton
Times, therefore temperature rise can produce excess pore water pressure, further reduce effective stress, soil skeleton occurs destruction and makes deformation
Increase, under the drainage of plastic draining board, excess pore water pressure, which progressively dissipates, completes consolidation, so that it is aqueous to reduce sludge
Amount；
In processing procedure, carry out artificial probing and fetch earth, obtain disturbed sample, its water content is measured, when water content is less than
During 40%-50%, stopping processing closing jet pump and electrical bar, after vacuum preloading unloading, removes diaphragm seal, chimney filter, geotechnique
Cloth, working cushion layer, electrical bar；
3) Soil-cement cure stage
Sludge injects cement mortar into sludge after above-mentioned processing, next using cement mixing pile makes sludge and cement
Slurry is mixed, and on the one hand improves shearing strength reduction water content, machine thing is on the other hand fixed with using hardening of cement effect
With other pollutants；
4) solidification sludge digs out the stage
7-10 days after the completion of cement mixing pile, carry out solidification sludge and dig out.
In the above-mentioned technical solutions, removable ceiling is set above processing pond, prevented in sludge collection and processing procedure
Escape pernicious gas pollution atmospheric environment；Gas sampling pipeline is set in processing pond top-side, harmful odor gas is realized
Taking back and process；Sludge input channel is set in processing pond top-side, for inputting sludge into processing pond.
In the above-mentioned technical solutions, the coagulant selects polyacrylamide or sodium carbonate, and ratio is 0.3%, directly
In the injection of sludge pipe outlet；The dry fine sand is often raised 1 meter and splashed once using mode of splashing, every square metre of consumption
About 0.005m3。
In the above-mentioned technical solutions, Soil-cement cure stage, is stirred, cement mixing content about 10% using two sprays four, water ash
Than less than 0.5.
In the above-mentioned technical solutions, stainless-steel pipe top is provided with hanger, is easy to lifting.
A kind of vacuum pre-pressed joint electrical heating drainage equipment for Treatment of Sludge, including vacuum preloading draining subsystem and
Electrical heating subsystem,
Sludge top surface laying diaphragm seal in processing pond, pastes processing pond pool wall, and stop in advance by diaphragm seal surrounding
Plastic draining board, plastic draining board wrench and chimney filter colligation are set in enough settling amounts, the sludge in processing pond, chimney filter passes through
Membrane device is drawn diaphragm seal and is connected with jet pump, constitutes vacuum preloading draining subsystem；
Electrical bar is inserted in sludge in processing pond, the current supply line of electrical bar draws diaphragm seal and connects power supply
Case, constitutes electrical heating subsystem；
The plastic draining board and electrical bar are set in sludge vertically into dot matrix.
The advantages of the present invention are：
The present invention is sunk from the thinking of on-site sludge treatment in situ by the way that little particle is promoted into solidifying promotion mud granule
Product, using vacuum pre-pressed joint electrical heating draining, reduces sludge moisture content, follow-up Deep Mixing Method further reduces aqueous
Amount, and sludge intensity is improved, solidify harmful substance, be suitable for landfill or constructing roadbed.
Brief description of the drawings
Fig. 1 is processing pond structural representation.
Fig. 2 is processing pond structural representation.
Fig. 3 is the schematic diagram of sludge collection and pretreatment stage.
Fig. 4 is the structural representation for filtering well.
Fig. 5 is the schematic diagram of vacuum pre-pressed joint electrical heating bleeding stage.
Fig. 6 is plastic draining board and electrical bar dot matrix arrangement schematic diagram.
Fig. 7 is the schematic diagram of Soil-cement cure stage.
Fig. 8 is the schematic diagram that solidification sludge digs out the stage.
Embodiment
Technical scheme is further illustrated with reference to specific embodiment.
(1) processing pond and accessory structure design：
Referring to accompanying drawing 1 and Fig. 2, sludge treatment pond is typically made up of the processing pond 1 of two and the above, one of processing pond
When carrying out Treatment of Sludge, another can collect sludge.After Treatment of Sludge terminates, the sludge after being handled in processing pond is dug
Go out, be that next step collection sludge is prepared, carry out the Treatment of Sludge in another processing pond, two processing ponds cooperate, real
Existing cross construction, realizes two big functions of storage mud and processing.
Gantry crane is set in processing pond 1 or autocrane is used, is easy to Treatment of Sludge and subsequently digs out processing
Sludge afterwards.
Removable ceiling 2 is set above processing pond, effusion pernicious gas pollution in sludge collection and processing procedure is prevented
Atmospheric environment.
Gas sampling pipeline 3 is set in the top-side of processing pond 1, the taking back and process of harmful odor gas is realized.
Sludge input channel 4 is set in the top-side of processing pond 1, for inputting sludge into processing pond 1.
(2) technical flow design：
Whole sludge treatment technique is divided into sludge collection and pretreatment stage, Treatment of Sludge stage and solidification sludge dig out rank
Section.
1) sludge is collected and pretreatment stage
Multiple filter wells 5 are vertically arranged in processing pond, filter well is grown to every 3m along processing pond 1 to be set, and filter well is using punching
Stainless-steel pipe, filter well length with handle tank depth it is identical, a diameter of 40cm, wall thickness 0.5cm, steel pipe outsourcing filter cloth, filter cloth
Equivalent grain size is less than mud granule, and stainless-steel pipe bottom end closure top end opening is provided with the inner bottom of stainless-steel pipe
Immersible pump 5-1, immersible pump delivery port connection drainpipe 5-2 draws filter well, the water in well is filtered with timely discharge, in stainless-steel pipe
Top is provided with hanger 5-3, is easy to lifting；
Then sludge is inputted into processing pond, coagulant is added during sludge is inputted, fine sand is dried, to eliminate dirt
Electric charge between mud particle, accelerates particle movement and deposition, so as to promote the water in sludge to enter in filter well, and logical screened well
Immersible pump and drainpipe discharge the water filtered in well；Coagulant selects polyacrylamide or sodium carbonate, and ratio is 0.3%, directly
It is connected on the injection of sludge pipe outlet；Fine sand is dried using mode of splashing, often 1 meter is raised and splashes once, every square metre of consumption is about
0.005m3；
After the collection stage terminates, stainless steel chimney filter is extracted, is that follow-up sludge soil processing is ready.
2) Treatment of Sludge stage (including vacuum pre-pressed joint electrical heating bleeding stage and Soil-cement cure stage)
A, vacuum pre-pressed joint electrical heating bleeding stage
Sludge top surface in processing pond lays one layer of geotextiles and a layer compression cystosepiment as working cushion layer, then beats
If plastic draining board 6, plastic draining board spacing is 1m, and plastic draining board is arranged into square dot matrix, depth and the native depth of sludge
It is identical, and chimney filter is laid, by plastic draining board wrench and chimney filter colligation；
Electrical bar 7 is inserted into sludge, electrical bar arranges that depth is identical with sludge deep into square dot matrix, electrical bar
Power is 6W/m, and is connected with wire with power supply box 8, and the heating-up temperature of the electrical bar, can be in electrical bar using automatically controlling
Upper setting temperature sensor, temperature sensor is connected with controller, and when temperature is more than 90 degrees Celsius, controller controls electrical bar
On-off circuit power-off stops heating, and when temperature is less than 80 degrees Celsius, the on-off circuit conducting of controller control electrical bar is added
Heat；
Then, one layer of geotextiles are laid, diaphragm seal surrounding is pasted processing pond pool wall, and stop in advance by 1-3 layers of diaphragm seal
Enough settling amounts；
Then, chimney filter and membrane device are installed, and connect jet pump 9；
Starting jet pump is simultaneously heated electrical bar, and jet pump is vacuumized, in level to pore water pressure pressure difference
Under effect, hole current direction plastic draining board carries out draining；Electrical bar raises sludge soil temperature degree, and its osmotic coefficient k is with temperature
Raise and become big, be conducive to accelerating the native rate of consolidation of sludge, another aspect, because the thermal coefficient of expansion of pore water is soil skeleton
15 times, therefore temperature rise can produce excess pore water pressure, further reduce effective stress, soil skeleton occurs destruction and makes change
Shape increases, under the drainage of plastic draining board, and excess pore water pressure, which progressively dissipates, completes consolidation, so that it is aqueous to reduce sludge
Amount；
In processing procedure, the monitoring instruments such as pore pressure gauge and thermometer, real-time monitored can be set in sludge
The situation of change of sludge soil pore water pressure power and sludge soil temperature degree；
In processing procedure, carry out artificial probing and fetch earth, obtain disturbed sample, its water content is measured, when water content is less than
During 40%-50%, processing can be stopped；
After vacuum preloading unloading, diaphragm seal, chimney filter, geotextiles, working cushion layer, electrical bar etc. are removed.
B, Soil-cement cure stage
Sludge injects cement mortar into sludge after above-mentioned processing, next using cement mixing pile 10 makes sludge and water
Mud is mixed (cement mixing pile 10 configures bucket 12 by feeding pipeline and slush pump 11, cement mortar and is sequentially connected), a side
Shearing strength reduction water content is improved in face, and machine thing and other pollutants are on the other hand fixed with using hardening of cement effect；By
In retaining plastic draining board in sludge, thus need using Publication No. CN103939020B " a kind of antiwind deep layer is stirred
Mix a drill bit " cement mixing pile driving construction is carried out, it can prevent from forming inclusion enclave influence soil cement uniformity on drill bit；Construction work
Skill is stirred using two sprays four, cement mixing content about 10%, and the ratio of mud, which is less than between 0.5, each cement mixing pile pile body, is engaged 10cm.
3) solidification sludge digs out the stage
7-10 days after the completion of cement mixing pile, solidification sludge can be carried out and dug out.It is main to utilize excavator 13 in processing pond
Solidification sludge loads well-bucket 14, and gantry crane 15 vertical transport well-bucket, and the car that runway is parked will be discharged into well-bucket
In bucket, horizontal transport is carried out by haulage vehicle, and carry out roadbed filling etc..
Exemplary description is done to the present invention above, it should explanation, in the situation for the core for not departing from the present invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent substitution of creative work equal
Fall into protection scope of the present invention.
Claims (6)
1. it is a kind of utilize ground treatments carry out sludge dewatering with solidification processing method, it is characterised in that including with
Lower step：
1) sludge is collected and pretreatment stage
Multiple filter wells are vertically arranged in processing pond, filter well is using the stainless-steel pipe of punching, steel pipe outsourcing filter cloth, stainless steel steel
Pipe bottom end closure top end opening, immersible pump, immersible pump delivery port connection drainpipe are provided with the inner bottom of stainless-steel pipe
Draw filter well；
Then sludge is inputted into processing pond, coagulant is added during sludge is inputted, fine sand is dried, to eliminate sludge
Electric charge between grain, accelerates particle movement and deposition, so as to promote the water in sludge to enter filter well；And immersible pump is opened, pass through
The immersible pump and drainpipe filtered in well discharge the water filtered in well；
After the collection stage terminates, stainless steel chimney filter is extracted, is that follow-up sludge soil processing is ready；
2) vacuum pre-pressed joint electrical heating bleeding stage
Then sludge top surface laying geotextiles and compression foam plate in processing pond set plastic draining as working cushion layer
Plate, and chimney filter is laid, by plastic draining board wrench and chimney filter colligation；And electrical bar is inserted into sludge, by electrical bar wire with
Power supply box is connected；
Then, laying geotextiles and diaphragm seal, processing pond pool wall, and reserved enough settling amounts are pasted by diaphragm seal surrounding；
Then chimney filter and membrane device are installed, and connects jet pump；
Starting jet pump is simultaneously heated electrical bar, and jet pump is vacuumized, in level to pore water pressure differential pressure action
Under, hole current direction plastic draining board carries out draining；Electrical bar raises sludge soil temperature degree, and its osmotic coefficient k is raised with temperature
And become big, to accelerate the native rate of consolidation of sludge, on the other hand, because the thermal coefficient of expansion of pore water is 15 times of soil skeleton, because
The rise of this temperature can produce excess pore water pressure, further reduce effective stress, and soil skeleton occurs destruction and increases deformation,
Under the drainage of plastic draining board, excess pore water pressure, which progressively dissipates, completes consolidation, so as to reduce sludge moisture content；
In processing procedure, carry out artificial probing and fetch earth, obtain disturbed sample, measure its water content, when water content is less than 40%-
When 50%, stopping processing closing jet pump and electrical bar, after vacuum preloading unloading, removes diaphragm seal, chimney filter, geotextiles, work
Bed course, electrical bar；
3) Soil-cement cure stage
Sludge injects cement mortar into sludge after above-mentioned processing, next using cement mixing pile makes sludge enter with cement mortar
Row mixing, is on the one hand improved shearing strength reduction water content, machine thing and its is on the other hand fixed with using hardening of cement effect
His pollutant；
4) solidification sludge digs out the stage
7-10 days after the completion of cement mixing pile, carry out solidification sludge and dig out.
2. the processing method according to claim 1 that sludge dewatering and solidification are carried out using ground treatments, its
It is characterised by：Removable ceiling is set above processing pond, effusion pernicious gas pollution in sludge collection and processing procedure is prevented
Atmospheric environment；Gas sampling pipeline is set in processing pond top-side, the taking back and process of harmful odor gas is realized；In processing
Pond top-side sets sludge input channel, for inputting sludge into processing pond.
3. the processing method according to claim 1 that sludge dewatering and solidification are carried out using ground treatments, its
It is characterised by：The coagulant selects polyacrylamide or sodium carbonate, and ratio is 0.3%, directly in sludge pipe outlet
Injection；The dry fine sand is often raised 1 meter and splashed once using mode of splashing, every square metre of consumption about 0.005m3。
4. the processing method according to claim 1 that sludge dewatering and solidification are carried out using ground treatments, its
It is characterised by：Soil-cement cure stage, is stirred, cement mixing content about 10%, the ratio of mud is less than 0.5 using two sprays four.
5. the processing method according to claim 1 that sludge dewatering and solidification are carried out using ground treatments, its
It is characterised by：Stainless-steel pipe top is provided with hanger, is easy to lifting.
6. a kind of vacuum pre-pressed joint electrical heating drainage equipment for Treatment of Sludge, it is characterised in that：Including vacuum preloading row
Water subsystem and electrical heating subsystem,
Sludge top surface laying diaphragm seal in processing pond, pastes processing pond pool wall, and reserve enough by diaphragm seal surrounding
Plastic draining board, plastic draining board wrench and chimney filter colligation are set in settling amount, the sludge in processing pond, chimney filter passes through membrane
Device is drawn diaphragm seal and is connected with jet pump, constitutes vacuum preloading draining subsystem；
Electrical bar is inserted in sludge in processing pond, the current supply line of electrical bar draws diaphragm seal and connects power supply case,
Constitute electrical heating subsystem；
The plastic draining board and electrical bar are set in sludge vertically into dot matrix.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107543913A (en) * | 2017-07-31 | 2018-01-05 | 中交天津港湾工程研究院有限公司 | Vacuum combined heating foundation drainage test instrument |
| CN108532648A (en) * | 2018-03-15 | 2018-09-14 | 宁波大学 | The foundation model experimental rig and test method of vacuum pre-pressed joint heating |
| CN111423081A (en) * | 2020-03-17 | 2020-07-17 | 南京万德斯环保科技股份有限公司 | Method for in-situ remediation of sludge containing heavy metals |
| CN111960626A (en) * | 2020-08-28 | 2020-11-20 | 浙江建工水利水电建设有限公司 | Sludge curing method and sludge curing device |
| CN112281807A (en) * | 2020-09-27 | 2021-01-29 | 江苏鑫泰岩土科技有限公司 | Pressurizing heat-sensitive vaporization phase-change consolidation method and heat-desensitization intermittent evaporator thereof |
| CN113896387A (en) * | 2021-11-03 | 2022-01-07 | 南京工业职业技术大学 | Sludge purification and dehydration structure based on combination of thermal desorption technology and vacuum preloading technology and construction method thereof |
| CN114197442A (en) * | 2021-11-29 | 2022-03-18 | 中交（天津）生态环保设计研究院有限公司 | Environment-friendly efficient dehydration drying method for dredged ultra-soft soil |
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| CN108532648A (en) * | 2018-03-15 | 2018-09-14 | 宁波大学 | The foundation model experimental rig and test method of vacuum pre-pressed joint heating |
| CN111423081A (en) * | 2020-03-17 | 2020-07-17 | 南京万德斯环保科技股份有限公司 | Method for in-situ remediation of sludge containing heavy metals |
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| CN111960626B (en) * | 2020-08-28 | 2023-11-07 | 浙江建工水利水电建设有限公司 | Silt curing method and silt curing device |
| CN112281807A (en) * | 2020-09-27 | 2021-01-29 | 江苏鑫泰岩土科技有限公司 | Pressurizing heat-sensitive vaporization phase-change consolidation method and heat-desensitization intermittent evaporator thereof |
| CN112281807B (en) * | 2020-09-27 | 2022-07-22 | 江苏鑫泰岩土科技有限公司 | Pressurizing heat-sensitive vaporization phase-change consolidation method and heat-desensitization intermittent evaporator thereof |
| CN113896387A (en) * | 2021-11-03 | 2022-01-07 | 南京工业职业技术大学 | Sludge purification and dehydration structure based on combination of thermal desorption technology and vacuum preloading technology and construction method thereof |
| CN114197442A (en) * | 2021-11-29 | 2022-03-18 | 中交（天津）生态环保设计研究院有限公司 | Environment-friendly efficient dehydration drying method for dredged ultra-soft soil |
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