CN106988295B - Sludge dewatering and cured processing method and its processing equipment are carried out using ground treatments - Google Patents
Sludge dewatering and cured processing method and its processing equipment are carried out using ground treatments Download PDFInfo
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- CN106988295B CN106988295B CN201710170710.2A CN201710170710A CN106988295B CN 106988295 B CN106988295 B CN 106988295B CN 201710170710 A CN201710170710 A CN 201710170710A CN 106988295 B CN106988295 B CN 106988295B
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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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- 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)
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- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
Sludge dewatering and cured processing method are carried out using ground treatments the invention discloses a kind of, the following steps are included: 1) sludge collect and pretreatment stage: multiple filter wells are vertically arranged in processing pond, lead to screened well in immersible pump and drainpipe will filter well in water discharge；2) vacuum pre-pressed joint electric heating bleeding stage: the sludge top surface in processing pond is laid with working cushion layer, then sets plastic draining board system, and electrical bar is inserted into sludge；3) Soil-cement cure stage: cement slurry is next injected into sludge using cement mixing pile mixes sludge with cement slurry；4) solidification sludge digs out the stage.The present invention is drained using vacuum pre-pressed joint electric heating, reduces sludge moisture content, and subsequent Deep Mixing Method further decreases 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 fields, are further related to Recycle of Sludge in Wastewater Treatment Plant field, tool
Body is to carry out sludge dewatering and cured processing method and its processing equipment using ground treatments.
Background technique
Sewage treatment plant can generate sludge during handling sewage, and sludge moisture content is about 100%, the content of organic matter
50%-70%, mud granule is small, poor permeability.Minimizing is followed for the processing of sludge, is stabilized, it is innoxious.Wherein, CJ/
T249-2007 regulation, for sludge moisture content less than 60%, shearing strength is greater than 25kPa after the processing of blended landfill.For sludge
Processing is generally first concentrated and is dehydrated.For sludge after concentration, moisture content is 95% or so, but still is flow fluid
Shape often need to further be dehydrated reduction moisture content.Dewatering mainly has nature desiccation and two kinds of mechanical dehydration.In addition, there are also electricity
The techniques such as dehydration are seeped, but smaller in the prevalence for the treatment of capacity, the problems such as running cost is high.In the stabilization principal degradation sludge of sludge
Smelly organic matter is easily degenerated, the quantity of liquid and solid is reduced, reduces pathogen, eliminates stink.Stable method has aerobic
Digestion, anaerobic digestion, Composting etc..
Compared with sludge, reclaiming land around sea formed 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 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 solution foundation bearing capacity and settlement issues, Treatment of Sludge are mainly closed
Infusing water content to reduce is sludge reduction, and soil strength needs centainly to increase and fix the harmful substance in sludge, be suitable for
Landfill disposal.
Different from basement process, Treatment of Sludge, which is not concerned with, solves foundation bearing capacity and settlement issues, is primarily upon water content
Reducing is sludge reduction, and soil strength needs certain growth and fixes the harmful substance in sludge, after being suitable for landfill etc.
Continuous processing processing.The scale of construction of Treatment of Sludge is relatively fewer, therefore insensitive for cost, can using in some basement process compared with
The technology for the higher cost used less, such as flocculant promote solidifying method, electrical heating method.Small, the organic matter since there is mud granules
The peculiar properties such as content height, thus it is limited to handle sludge effect using a kind of independent method for processing foundation, and needing will a variety ofly
Base processing method joins together to carry out the dehydration and solidification of sludge.Therefore need to design a kind of knockdown sludge treatment technique,
Various basement process techniques are effectively combined, realize the apparatus and method of sludge dewatering and cured integrated treatment.
Summary of the invention
Dirt is carried out using ground treatments it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of
Mud dehydration and cured processing method and its processing equipment, are applied to the processing of sludge, realize that the sludge dewatering of large volume is solid
Change processing, and realize the later use of sludge.
The present invention is achieved by the following technical solutions:
It is a kind of to carry out sludge dewatering and cured processing method using ground treatments, comprising the following steps:
1) sludge collection and pretreatment stage
Multiple filter wells are vertically arranged in processing pond, for filter well using the stainless-steel pipe punched, steel pipe outsourcing filter cloth is stainless
Steel steel pipe bottom end closure top end opening is provided with immersible pump, immersible pump water outlet connection row in the inner bottom of stainless-steel pipe
Water pipe draws filter well；
Then sludge is inputted into processing pond, coagulant, dry fine sand is added, during inputting sludge to eliminate dirt
Charge between mud particle accelerates particle mobile and deposition, so that the water in sludge be promoted to enter filter well；And immersible pump is opened,
Immersible pump and drainpipe in logical screened well are discharged the water in well is filtered；
After the collection stage, stainless steel chimney filter is extracted, is ready for the processing of subsequent sludge soil；
2) vacuum pre-pressed joint electric heating bleeding stage
Sludge top surface in processing pond is laid with geotextiles and compression foam plate as working cushion layer, then sets plastic row
Water plate, and it is laid with chimney filter, plastic draining board wrench and chimney filter are bound；And electrical bar is inserted into sludge, by electrical bar conducting wire
It is connected with power supply box；
Then, geotextiles and sealing film are laid with, sealing film surrounding are pasted into processing pond pool wall, and reserve enough sedimentations
Amount；Then chimney filter and membrane device are installed, and connect jet pump；
Starting jet pump simultaneously heats electrical bar, and jet pump is vacuumized, in horizontal direction pore water pressure pressure difference
Under effect, pore water flows to plastic draining board and is drained；Electrical bar increases sludge soil temperature degree, and osmotic coefficient k is with temperature
It increases and becomes larger, to accelerate sludge soil rate of consolidation, on the other hand, since the thermal expansion coefficient of pore water is the 15 of soil skeleton
Times, therefore temperature raising can generate excess pore water pressure, further reduce effective stress, soil skeleton occurs to destroy and make to deform
Increase, under the drainage of plastic draining board, excess pore water pressure, which gradually dissipates, completes consolidation, so that it is aqueous to reduce sludge
Amount；
During processing, it carries out artificial probing and takes soil, obtain disturbed sample, its water content is measured, when water content is less than
When 40%-50%, jet pump and electrical bar are closed in stopping processing, after vacuum preloading unloading, removal sealing film, and chimney filter, geotechnique
Cloth, working cushion layer, electrical bar；
3) Soil-cement cure stage
For sludge after above-mentioned processing, cement slurry is next injected into sludge using cement mixing pile makes sludge and cement
Slurry is mixed, and on the one hand improving shearing strength reduces water content, and machine object 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, carries out solidification sludge and dig out.
In the above-mentioned technical solutions, removable ceiling is set above processing pond, is prevented in sludge collection and treatment process
It escapes pernicious gas and pollutes atmospheric environment；Gas sampling pipeline is set in processing pond top-side, realizes harmful odor gas
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 selection polyacrylamide or sodium carbonate, ratio 0.3%, directly
It is injected in sludge pipe outlet；The dry fine sand spilled once using mode of splashing, every 1 meter of raising, every square metre of dosage
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 lifting lug, is easy to lift.
A kind of vacuum pre-pressed joint electric heating drainage equipment for Treatment of Sludge, including vacuum preloading draining subsystem and
Electric heating subsystem,
Sludge top surface in processing pond is laid with sealing film, sealing film surrounding is pasted processing pond pool wall, and stop in advance
Enough settling amounts set plastic draining board in the sludge in processing pond, and plastic draining board wrench and chimney filter are bound, and chimney filter passes through
Membrane device is drawn sealing film and is connect with jet pump, constitutes vacuum preloading and drains subsystem；
Electrical bar is inserted into sludge in processing pond, the current supply line of electrical bar draws sealing film and connects power supply
Case constitutes electric heating subsystem；
The plastic draining board and electrical bar are set in sludge vertically at dot matrix.
The advantages and benefits 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 solidifying promotion mud granule
Product is drained using vacuum pre-pressed joint electric heating, reduces sludge moisture content, subsequent Deep Mixing Method further decreases aqueous
Amount, and sludge intensity is improved, solidify harmful substance, is suitable for landfill or constructing roadbed.
Detailed description of the invention
Fig. 1 is processing pond structural schematic diagram.
Fig. 2 is processing pond structural schematic diagram.
Fig. 3 is the schematic diagram of sludge collection and pretreatment stage.
Fig. 4 is the structural schematic diagram for filtering well.
Fig. 5 is the schematic diagram of vacuum pre-pressed joint electric 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.
Specific embodiment
Technical solution of the present invention is further illustrated combined with specific embodiments below.
(1) processing pond and accessory structure design:
Referring to attached drawing 1 and Fig. 2, sludge treatment pond is generally made of two or more processing ponds 1, one of processing pond
When carrying out Treatment of Sludge, another can collect sludge.After Treatment of Sludge, by treated in processing pond, sludge is dug
Out, it prepares to collect sludge in next step, carries 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 uses autocrane, convenient for Treatment of Sludge and subsequent digs out processing
Sludge afterwards.
Removable ceiling 2 is set above processing pond, prevents evolution pernicious gas pollution in sludge collection and treatment process
Atmospheric environment.
Gas sampling pipeline 3 is set in 1 top-side of processing pond, realizes the taking back and process of harmful odor gas.
Sludge input channel 4 is set in 1 top-side of processing pond, for inputting sludge into processing pond 1.
(2) technical flow design:
Entire sludge treatment technique is divided into sludge collection and pretreatment stage, Treatment of Sludge stage and solidification sludge dig out rank
Section.
1) sludge collection and pretreatment stage
Multiple filter wells 5 are vertically arranged in processing pond, filter well is arranged along the length of processing pond 1 to every 3m, and filter well is using punching
Stainless-steel pipe, filter well length with handle tank depth it is identical, diameter 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 in the inner bottom of stainless-steel pipe
Immersible pump 5-1, immersible pump water outlet connect drainpipe 5-2 and draw filter well, with the water in timely discharge filter well, in stainless-steel pipe
Top is provided with lifting lug 5-3, is easy to lift；
Then sludge is inputted into processing pond, coagulant, dry fine sand is added, during inputting sludge to eliminate dirt
Charge between mud particle accelerates particle mobile and deposition, to promote the water in sludge to enter filter well, and in logical screened well
Immersible pump and drainpipe are discharged the water in well is filtered；Coagulant selection polyacrylamide or sodium carbonate, ratio 0.3%, directly
It connects and is injected in sludge pipe outlet；Dry fine sand spilled once using mode of splashing, every 1 meter of raising, and every square metre of dosage is about
0.005m3；
After the collection stage, stainless steel chimney filter is extracted, is ready for the processing of subsequent sludge soil.
2) Treatment of Sludge stage (including vacuum pre-pressed joint electric heating bleeding stage and Soil-cement cure stage)
A, vacuum pre-pressed joint electric heating bleeding stage
Sludge top surface in processing pond is laid with one layer of geotextiles and a layer compression cystosepiment as working cushion layer, then beats
If plastic draining board 6, plastic drainage board spacing 1m, plastic draining board is arranged at square dot matrix, depth and sludge soil depth
It is identical, and it is laid with chimney filter, plastic draining board wrench and chimney filter are bound；
Electrical bar 7 is inserted into sludge, electrical bar arranges that depth is identical as sludge deep at square dot matrix, electrical bar
Power is 6W/m, and is connected with conducting wire with power supply box 8, and the heating temperature of the electrical bar, can be in electrical bar using automatically controlling
Upper setting temperature sensor, temperature sensor are connect with controller, and when temperature is more than 90 degrees Celsius, controller controls electrical bar
Switching circuit power-off stops heating, and when temperature is lower than 80 degrees Celsius, controller control electrical bar switching circuit conducting is added
Heat；
Then, one layer of geotextiles are laid with, sealing film surrounding is pasted processing pond pool wall, and stopped in advance by 1-3 layers of sealing film
Enough settling amounts；
Then, chimney filter and membrane device are installed, and connect jet pump 9；
Starting jet pump simultaneously heats electrical bar, and jet pump is vacuumized, in horizontal direction pore water pressure pressure difference
Under effect, pore water flows to plastic draining board and is drained；Electrical bar increases sludge soil temperature degree, and osmotic coefficient k is with temperature
It increases and becomes larger, be conducive to accelerate sludge soil rate of consolidation, on the other hand, since the thermal expansion coefficient of pore water is soil skeleton
15 times, therefore temperature raising can generate excess pore water pressure, further reduce effective stress, soil skeleton occurs to destroy and make to become
Shape increases, and under the drainage of plastic draining board, excess pore water pressure, which gradually dissipates, completes consolidation, so that it is aqueous to reduce sludge
Amount；
During processing, the monitoring instruments such as pore pressure gauge and thermometer can be set in sludge, observed in real time
The situation of change of sludge soil pore water pressure power and sludge soil temperature degree；
During processing, it carries out artificial probing and takes soil, obtain disturbed sample, its water content is measured, when water content is less than
When 40%-50%, it can stop handling；
After vacuum preloading unloading, removal sealing film, chimney filter, geotextiles, working cushion layer, electrical bar etc..
B, Soil-cement cure stage
For sludge after above-mentioned processing, cement slurry is next injected into sludge using cement mixing pile 10 makes sludge and water
Mud is mixed (cement mixing pile 10 is configured bucket 12 and be sequentially connected by feeding pipeline and slush pump 11, cement slurry), a side
Shearing strength is improved in face reduces water content, and machine object 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, and cement mixing content about 10%, the ratio of mud is engaged 10cm between each cement mixing pile pile body less than 0.5.
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 mainly will using excavator 13 in processing pond
Solidification sludge is packed into the vertical transport well-bucket of well-bucket 14 and gantry crane 15, and the vehicle that will be discharged into runway in well-bucket and park
In bucket, carried out horizontal transport by haulage vehicle, and carried out roadbed filling etc..
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (5)
1. a kind of utilize ground treatments to carry out sludge dewatering and cured processing method, which is characterized in that including with
Lower step:
1) sludge collection and pretreatment stage
Multiple filter wells, stainless-steel pipe of the filter well using punching, steel pipe outsourcing filter cloth, stainless steel steel are vertically arranged in processing pond
Pipe bottom end closure top end opening is provided with immersible pump in the inner bottom of stainless-steel pipe, and immersible pump water outlet connects drainpipe
Draw filter well；
Then sludge is inputted into processing pond, coagulant, dry fine sand is added, during inputting sludge to eliminate sludge
Charge between grain accelerates particle mobile and deposition, so that the water in sludge be promoted to enter filter well；And immersible pump is opened, pass through
The immersible pump and drainpipe filtered in well are discharged the water in well is filtered；
After the collection stage, stainless steel chimney filter is extracted, is ready for the processing of subsequent sludge soil；
2) vacuum pre-pressed joint electric heating bleeding stage
Sludge top surface in processing pond is laid with geotextiles and compression foam plate as working cushion layer, then sets plastic draining
Plate, and it is laid with chimney filter, plastic draining board wrench and chimney filter are bound；And electrical bar is inserted into sludge, by electrical bar conducting wire with
Power supply box is connected；
Then, geotextiles and sealing film are laid with, sealing film surrounding are pasted into processing pond pool wall, and reserve enough settling amounts；
Then chimney filter and membrane device are installed, and connect jet pump；
Starting jet pump simultaneously heats electrical bar, and jet pump is vacuumized, in horizontal direction pore water pressure differential pressure action
Under, pore water flows to plastic draining board and is drained；Electrical bar increases sludge soil temperature degree, and osmotic coefficient k is increased with temperature
And become larger, to accelerate sludge soil rate of consolidation, on the other hand, since the thermal expansion coefficient of pore water is 15 times of soil skeleton, because
The raising of this temperature can generate excess pore water pressure, further reduce effective stress, and soil skeleton occurs to destroy and increase deformation,
Under the drainage of plastic draining board, excess pore water pressure, which gradually dissipates, completes consolidation, to reduce sludge moisture content；
During processing, it carries out artificial probing and takes soil, obtain disturbed sample, measure its water content, when water content is less than 40%-
When 50%, jet pump and electrical bar are closed in stopping processing, after vacuum preloading unloading, removal sealing film, and chimney filter, geotextiles, work
Bed course, electrical bar；
3) Soil-cement cure stage
Sludge after above-mentioned processing, next using cement mixing pile injected into sludge cement slurry make sludge and cement slurry into
Row mixing, on the one hand improving shearing strength reduces water content, and machine object and its are 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, carries out solidification sludge and dig out.
2. according to claim 1 carry out sludge dewatering and cured processing method using ground treatments,
It is characterized in that: removable ceiling is set above processing pond, prevent evolution pernicious gas pollution in sludge collection and treatment process
Atmospheric environment；Gas sampling pipeline is set in processing pond top-side, realizes the taking back and process of harmful odor gas；It is handling
Sludge input channel is arranged in pond top-side, for inputting sludge into processing pond.
3. according to claim 1 carry out sludge dewatering and cured processing method using ground treatments,
Be characterized in that: the coagulant selects polyacrylamide or sodium carbonate, directly injects in sludge pipe outlet；The drying
Fine sand spilled once using mode of splashing, every 1 meter of raising, every square metre of dosage 0.005m3。
4. according to claim 1 carry out sludge dewatering and cured processing method using ground treatments,
Be characterized in that: Soil-cement cure stage is stirred using two sprays four.
5. according to claim 1 carry out sludge dewatering and cured processing method using ground treatments,
It is characterized in that: stainless-steel pipe top being provided with lifting lug, is easy to lift.
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Families Citing this family (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 |
| 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 |
| 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 |
| CN113896387B (en) * | 2021-11-03 | 2022-06-28 | 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 |
| CN114197442B (en) * | 2021-11-29 | 2023-09-22 | 中交（天津）生态环保设计研究院有限公司 | Environment-friendly efficient dehydration drying method for dredging ultra-soft soil |
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