CN111268875A - Silt slurry treatment method and integrated system - Google Patents
Silt slurry treatment method and integrated system Download PDFInfo
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- CN111268875A CN111268875A CN202010172695.7A CN202010172695A CN111268875A CN 111268875 A CN111268875 A CN 111268875A CN 202010172695 A CN202010172695 A CN 202010172695A CN 111268875 A CN111268875 A CN 111268875A
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- 239000002002 slurry Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 96
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 93
- 239000010802 sludge Substances 0.000 claims abstract description 33
- 239000008394 flocculating agent Substances 0.000 claims abstract description 32
- 239000011268 mixed slurry Substances 0.000 claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000005086 pumping Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 10
- 239000002689 soil Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 239000000945 filler Substances 0.000 abstract description 7
- 238000005189 flocculation Methods 0.000 abstract description 6
- 230000016615 flocculation Effects 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 abstract description 6
- 239000008187 granular material Substances 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 81
- 238000003860 storage Methods 0.000 description 9
- 230000018044 dehydration Effects 0.000 description 7
- 238000006297 dehydration reaction Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 231100000719 pollutant Toxicity 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sludge treatment, and particularly discloses a sludge treatment method and an integrated system, comprising S1, uniformly stirring sludge, sending the sludge into a curing agent stirring box, adding a curing agent into the curing agent stirring box, and stirring to obtain slurry-curing agent mixed slurry; s2, pumping the slurry-curing agent mixed slurry to a flocculant stirring box, uniformly adding a flocculant solution in the pumping process, and stirring to flocculate and deposit the slurry-curing agent mixed slurry to obtain slurry-curing agent-flocculant mixed slurry; s3, pumping the slurry mixture of the slurry, the curing agent and the flocculating agent into a filter press for dewatering to obtain a mud cake, and treating the mud cake by a granulating device to obtain mud granules. The invention directly converts the silt slurry with ultrahigh water content into compact silt particles through the integrated flocculation conditioning-filter pressing dewatering-granulating device, can effectively solve the problem of difficult end treatment of huge amount of silt slurry, and can relieve the dilemma of serious shortage of sandstone filler by the obtained silt particle and plain soil mixed filler.
Description
Technical Field
The invention belongs to the technical field of silt slurry treatment, and particularly relates to a silt slurry treatment method and an integrated system, in particular to an integrated system and a method for quickly treating high-water-content silt slurry in the aspects of civil engineering, port and waterway engineering, river and lake dredging engineering and the like.
Background
Every year, a large amount of dredging mud is generated from ports, docks, channels and inland rivers and lakes due to the treatment of the water environment, and a large amount of engineering mud is placed everywhere due to the construction of the engineering (the dredging mud and the engineering mud are collectively called ultra-high water content mud hereinafter). How to rapidly and effectively treat the huge amount of ultrahigh water content sludge is always a difficult problem faced by the engineering industry. At present, the treatment of the sludge with ultrahigh water content mainly adopts the following modes:
(1) treating a storage yard: the slurry with ultrahigh water content is directly transported to a storage yard for stacking, so that the slurry is deposited and solidified by self weight. The method is simple and direct, but the turnover period of the storage yard is long, the occupied area is large, and the slurry stacked for a long time is easy to cause secondary pollution to peripheral soil and underground water.
(2) And (3) burying after mechanical dehydration and decrement: the structure among slurry particles is changed by adding medicaments such as quicklime and the like, so that the slurry is easy to dehydrate, and then water is discharged by means of devices such as a plate-and-frame filter press or a high-speed centrifuge. The method can realize deep dehydration and greatly reduce volume, but due to the doping of quicklime and other medicaments, the dehydrated mud cake has high pH value, serious hardening and poor engineering mechanical property, can not be directly recycled, easily causes pollutant diffusion after being washed by rainwater, and finally can only be transported to a landfill site for landfill.
(3) High-temperature heat treatment: the slurry is processed and then is fired into bricks, cement clinker, ceramsite and the like. The method really realizes resource utilization, but has the disadvantages of high energy consumption, extremely low treatment efficiency and severe requirement on water content, and needs to carry out dehydration pretreatment on the dredging mud.
(4) Chemical curing treatment, in which the strength of the slurry is developed by adding curing agents such as cement and lime into the slurry, and the slurry can be recycled as a filler, but the effect of directly curing the slurry with ultrahigh water content (the water content is more than 300%) is very little, and the chemical curing treatment is uneconomical.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a silt slurry treatment method and an integrated system, and aims to directly convert the silt slurry with ultrahigh water content into compact silt particles through an integrated flocculation conditioning-filter pressing dehydration-granulation device, effectively solve the problem of difficult treatment of the tail end of the silt slurry with ultrahigh water content, relieve the dilemma of serious shortage of sandstone fillers to a certain extent by using the obtained filler mixed with plain soil, and realize simple operation and high treatment efficiency.
To achieve the above object, according to an aspect of the present invention, there is provided a sludge slurry treatment method including the steps of:
s1, uniformly stirring the silt slurry, sending the silt slurry into a curing agent stirring box, adding a curing agent into the silt slurry and stirring to obtain slurry-curing agent mixed slurry;
s2, pumping the slurry-curing agent mixed slurry to a flocculant stirring box, uniformly adding a flocculant solution in the pumping process, and stirring in the flocculant stirring box to flocculate and deposit the slurry-curing agent mixed slurry to obtain slurry-curing agent-flocculant mixed slurry;
s3, pumping the slurry-curing agent-flocculating agent mixed slurry into a filter press for dewatering to obtain a mud cake, and treating the mud cake by a granulating device to obtain mud particles so as to finish the treatment of the sludge slurry.
More preferably, the method further comprises step S4 of naturally curing the clods, piling the clods, and then uniformly mixing the clods with the plain soil and filling the mixture.
More preferably, the stirring speed in the curing agent stirring box is 90 r/min-150 r/min, and the stirring time is not less than 10 min.
More preferably, the stirring speed in the flocculant stirring tank is 60 r/min-90 r/min, and the stirring time is not less than 10 min.
More preferably, the dewatering time of the filter press is 30min to 50 min.
More preferably, the curing agent is one of cement, a cement-based composite curing agent and a retarder.
Further preferably, the flocculant solution is one of a polyacrylamide flocculant solution, an inorganic flocculant solution and a composite flocculant solution.
According to another aspect of the invention, the invention provides a sludge slurry treatment integrated system, which comprises a granulation device, a temporary slurry tank, a curing agent stirring box, a flocculating agent stirring box and a filter press, wherein the temporary slurry tank, the curing agent stirring box, the flocculating agent stirring box and the filter press are connected in sequence, and the granulation device comprises:
stirring devices are arranged in the temporary mud pit, the curing agent stirring box and the flocculating agent stirring box, a curing agent delivery device is arranged on the curing agent stirring box, and a flocculating agent delivery device is arranged on a communication pipeline between the curing agent stirring box and the flocculating agent stirring box; the granulating device is used for extruding and cutting the mud cake generated by the filter press.
Preferably, the temporary slurry pool is provided with a slurry pumping pipe, and the slurry pumping pipe and communicating pipelines among the temporary slurry pool, the curing agent stirring box, the flocculating agent stirring box and the filter press which are connected in sequence are provided with a feed flow valve; the curing agent delivery device comprises a curing agent flow valve, and the flocculating agent delivery device comprises a flocculating agent flow valve.
As a further preferred, the granulation device, the curing agent feeding device, the flocculating agent feeding device, the stirring device and the feed flow valve are all connected with a programmable logic controller or a computer.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the invention directly converts the silt slurry with ultrahigh water content into compact silt particles through the integrated flocculation conditioning-filter pressing dewatering-granulating device, can effectively solve the problem of difficult disposal of the tail end of the silt slurry with ultrahigh water content (including eliminating secondary pollution to the environment caused by transportation of the silt slurry with huge amount and avoiding land resource waste caused by direct disposal of the silt slurry with huge amount), and simultaneously the obtained silt particles and the plain soil mixed filler can relieve the difficulty of serious shortage of the sandstone filler to a certain extent and realize resource utilization of the silt slurry.
2. The integrated processing system of 'physical and chemical composite filter pressing dehydration-granulation' provided by the invention can rapidly process the silt slurry with ultrahigh water content, the curing agent and the flocculating agent are automatically added by corresponding devices in sequence, the addition amount is accurately controlled, the full-automatic control can be realized in the whole process, and the integrated processing system has the advantages of simple operation, high processing efficiency, good overall economic benefit, suitability for large-scale popularization and application and the like.
3. Compared with the traditional yard treatment, the invention has small occupied area and high treatment efficiency, and can also eliminate the secondary pollution caused by long-term stacking of the silt slurry with ultrahigh water content; compared with mechanical dehydration reduction treatment, the method can realize resource utilization of the silt slurry with ultrahigh water content and reduce the burden of a landfill site; compared with a high-temperature heat treatment method, the method has the advantages of high efficiency and low consumption; compared with a chemical curing method, the method can realize rapid curing treatment of the silt slurry with ultrahigh water content, and simultaneously has lower dosage of the curing agent required for reaching the same mechanical index and better overall economic benefit.
4. The invention fully utilizes the inherent time interval for the flocculant and the curing agent to exert the effects (usually, the flocculant generates obvious effects within 10min after being mixed, and the curing agent begins to exert the effects gradually after the initial setting time (generally more than 2 h-3 h)) to finish the press filtration and dehydration of the plate frame machine; before filter pressing, flocculation mainly occurs, then a plate frame machine removes a large amount of water through filter pressing, soil particles and curing agent particles are enabled to be closely arranged, and finally the cementation effect of the curing agent is more effective due to the fact that the particle distance is shortened through early-stage dehydration, so that the mechanical index of mud particles is remarkably improved, and the mud particle meets the requirement of soil filling performance.
Drawings
FIG. 1 is a schematic structural view of an integrated sludge slurry treatment system according to an embodiment of the present invention,
FIG. 2 is a flow chart of a sludge slurry treatment method according to an embodiment of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-sludge slurry, 2-slurry pumping pipe, 3 a-first feeding flow valve, 3 b-second feeding flow valve, 3 c-third feeding flow valve, 3 d-fourth feeding flow valve, 4 a-first stirring device, 4 b-second stirring device, 4 c-third stirring device, 5-temporary slurry tank, 6-curing agent storage bin, 7-curing agent feeder, 8-curing agent flow valve, 9-curing agent stirring tank, 10-flocculating agent storage tank, 11-flocculating agent feeder, 12-flocculating agent flow valve, 13-flocculating agent stirring tank, 14-filter press, 15-mud cake, 16-granulating device, 17-pressurizing part, 18-granulating device feeding port, 19-moving chute, 20-cutting steel string, 21-mud grain and 22-stacking mud grain.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The integrated system for treating sludge slurry provided by the embodiment of the invention, as shown in fig. 1, comprises a granulation device 16, and a temporary sludge tank 5, a curing agent stirring tank 9, a flocculating agent stirring tank 13 and a filter press 14 which are connected in sequence, wherein:
one end of the temporary slurry pool 5 is communicated with a slurry conveying pipe 2, the slurry conveying pipe 2 is provided with a first feeding flow valve 3a, the other end of the temporary slurry pool is connected with the curing agent stirring box 9 through a communicating pipeline, and the communicating pipeline is provided with a second feeding flow valve 3 b;
a curing agent delivery device is arranged on the curing agent stirring box 9, the curing agent stirring box 9 is connected with a flocculating agent stirring box 13 through a communicating pipeline, and a third feeding flow valve 3c and a flocculating agent delivery device are sequentially arranged on the communicating pipeline;
the flocculant stirring box 13 is connected with the filter press 14 through a communicating pipeline, and a fourth feeding flow valve 3d is arranged on the communicating pipeline;
a first stirring device 4a, a second stirring device 4b and a third stirring device 4c are respectively arranged in the temporary mud pit 5, the curing agent stirring box 9 and the flocculating agent stirring box 13;
the filter press 14 is preferably a plate-and-frame filter press, and the volume of the mixed slurry which can be processed by the filter press is 3-5 times of the volume of the slurry stirred by the flocculating agent stirring box, so that the high efficiency of the processing process is ensured;
the granulating device 16 is used for cutting the mud cake generated by the filter press 14, and specifically comprises a mud cake box, a pressurizing part 17, a moving chute 19 and a cutting steel string 20, wherein a feeding port 18 of the granulating device is formed in one side of the mud cake box, the pressurizing part 17 is mounted on the upper portion of the mud cake box, a hole is formed in the lower portion of the mud cake box, the moving chute 19 is mounted on the lower portion of the mud cake box, and the cutting steel string 20 is mounted on the moving chute 19.
Further, the curing agent delivery device comprises a curing agent storage bin 6, a curing agent delivery device 7 and a curing agent flow valve 8 which are connected in sequence, wherein the curing agent flow valve 8 is used for controlling the addition amount of the curing agent; the flocculant delivery device comprises a flocculant storage tank 10, a flocculant delivery device 11 and a flocculant flow valve 12 which are connected in sequence, wherein the flocculant flow valve 12 is used for controlling the addition amount of a flocculant.
Further, the feeding flow, the stirring device, the curing agent feeding device, the flocculating agent feeding device and the granulating device 16 are all connected with a Programmable Logic Controller (PLC) or a computer, and the PLC or the computer controls the feeding flow, the stirring device, the curing agent feeding device, the flocculating agent feeding device and the granulating device through preset programs so as to ensure accurate control of the addition of various materials and realize automatic control of the whole process.
When the integrated system works, the slurry 1 is pumped to the temporary slurry tank 5 through the slurry pumping pipe 2, the inflow amount of the slurry is controlled by the first feeding flow valve 3a, the high stability of the liquid level of the slurry in the temporary slurry tank 5 is ensured, the stirring efficiency is highest, the slurry 1 is uniformly stirred by the first stirring device 4a and is pumped to the curing agent stirring box 9, and the inflow amount of the slurry 1 to be pumped is accurately controlled by the second feeding flow valve 3 b; the curing agent in the curing agent storage bin 6 is delivered to a curing agent stirring box 9 through a curing agent delivery device 7, the addition amount of the curing agent is accurately controlled through a curing agent flow valve 8, the curing agent and the curing agent are stirred uniformly through a second stirring device 4b in the curing agent stirring box 9 to obtain slurry-curing agent mixed slurry, the slurry-curing agent mixed slurry is pumped to a flocculating agent stirring box 13, and the inflow amount of the slurry-curing agent mixed slurry is controlled through a third feeding flow valve 3c in the pumping process; the prepared flocculant solution is stored in the flocculant storage tank 10, and is uniformly added in the pumping process of the slurry-curing agent mixed slurry through a flocculant feeder 11, the adding amount is accurately controlled by a flocculant flow valve 12, the slurry-curing agent mixed slurry and the flocculant are uniformly stirred by a third stirring device 4c in a flocculation stirring box 13 to form slurry-curing agent-flocculant mixed slurry, the slurry-curing agent-flocculant mixed slurry is pumped to a plate and frame filter press 14 to be filtered and dehydrated in pressure to obtain a mud cake 15, and the pumping amount of the slurry-curing agent-flocculant mixed slurry is controlled by a fourth feeding flow valve 3 d; the mud cake 15 is conveyed into a granulating device 16 from a feeding port 18 of the granulating device, the mud cake 15 is extruded from a small hole at the lower part through a pressurizing part 17, and then is cut back and forth through a moving chute 19 by a cutting steel wire 20 to obtain mud granules 21 with the grain diameter of less than 50 mm.
The integrated system is particularly suitable for treating high-water-content sludge (such as dredged sludge, engineering sludge and the like), namely the water content (the mass ratio of water to dry soil particles) in the sludge is more than 300%, and specifically comprises the following steps as shown in figure 2:
s1, uniformly stirring the silt slurry in the temporary slurry tank at the speed of 60 r/min-120 r/min, and depositing large-particle impurities at the bottom;
s2, pumping the uniformly stirred silt slurry to a curing agent stirring box, adding a curing agent into the curing agent stirring box, and quickly stirring to obtain slurry-curing agent mixed slurry;
s3, pumping the slurry-curing agent mixed slurry to a flocculant stirring box, uniformly adding a flocculant solution in the pumping process, and then slowly stirring in the flocculant stirring box to uniformly mix the slurry-curing agent mixed slurry with a flocculant and perform a flocculation deposition reaction to obtain slurry-curing agent-flocculant mixed slurry;
s4, pumping the slurry mixture of the slurry, the curing agent and the flocculating agent into a filter press for high-pressure dehydration, and obtaining a mud cake 15 with the water content of 60-70% after 30-50 min;
s5, conveying the mud cake 15 into a granulating device for granulation, wherein the grain size of the obtained mud grains 21 after granulation is less than 50mm, and finishing the treatment of the sludge slurry; and then, piling the mud particles 15 to an open field and naturally maintaining, preventing rainwater from directly spraying to develop the strength of the mud particles, piling the mud particles to form piled mud particles 22, transporting the piled mud particles to a filling site when required by filling engineering, and filling the mixture after mixing the plain soil and the hardened mud particles uniformly by an excavator on site to realize resource utilization of the mixture.
Further, the stirring speed in the curing agent stirring box is 90 r/min-150 r/min, and the stirring time is not less than 10min, and is further preferably 10 min.
Further, the stirring speed in the flocculant stirring tank is 60 r/min-90 r/min, and the stirring time is not less than 10min, and is further preferably 10 min.
Further, the curing agent is one of cement, a cement-based composite curing agent and a retarder, wherein when the cement is added, the mixing amount of the curing agent is 10-15% of the mass of the dry mud.
Further, the flocculant solution is one of polyacrylamide flocculant solution, inorganic flocculant solution and composite flocculant solution, wherein the polyacrylamide flocculant solution is preferably polyacrylamide which is dissolved in water according to the mass ratio of 1:1000 to form AN926SHUC anionic polyacrylamide flocculant solution, and the mixing amount of solid particles is 0.1-0.2% of the mass of the dry mud.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The sludge slurry treatment method is characterized by comprising the following steps:
s1, uniformly stirring the silt slurry, sending the silt slurry into a curing agent stirring box, adding a curing agent into the silt slurry and stirring to obtain slurry-curing agent mixed slurry;
s2, pumping the slurry-curing agent mixed slurry to a flocculant stirring box, uniformly adding a flocculant solution in the pumping process, and stirring in the flocculant stirring box to flocculate and deposit the slurry-curing agent mixed slurry to obtain slurry-curing agent-flocculant mixed slurry;
s3, pumping the slurry-curing agent-flocculating agent mixed slurry into a filter press for dewatering to obtain a mud cake, and treating the mud cake by a granulating device to obtain mud particles so as to finish the treatment of the sludge slurry.
2. The method of treating sludge slurry as claimed in claim 1, further comprising the step of S4 of naturally curing the sludge blocks, stacking the cured sludge blocks, and uniformly mixing the cured sludge blocks with plain soil for filling.
3. The method of treating sludge slurry according to claim 1 wherein the stirring speed in the curing agent stirring tank is 90r/min to 150r/min and the stirring time is not less than 10 min.
4. The sludge treatment method of claim 1 wherein the stirring rate in the flocculant stirring tank is 60r/min to 90r/min and the stirring time is not less than 10 min.
5. The method of treating sludge slurry according to claim 1 wherein the dewatering time of said filter press is 30 to 50 min.
6. The method of treating sludge slurry according to claim 1 wherein the curing agent is one of cement, a cement-based composite curing agent, and a retarder.
7. The sludge treatment method of any one of claims 1 to 6, wherein the flocculant solution is one of a polyacrylamide-based flocculant solution, an inorganic flocculant solution, and a composite flocculant solution.
8. An integrated sludge slurry treatment system for implementing the method according to any one of claims 1 to 7, comprising a granulation device (16) and a temporary slurry tank (5), a curing agent stirring tank (9), a flocculant stirring tank (13) and a filter press (14) which are connected in sequence, wherein:
stirring devices are arranged in the temporary mud pit (5), the curing agent stirring box (9) and the flocculating agent stirring box (13), a curing agent delivery device is arranged on the curing agent stirring box (9), and a flocculating agent delivery device is arranged on a communication pipeline between the curing agent stirring box (9) and the flocculating agent stirring box (13); the granulating device (16) is used for extruding and cutting the mud cake generated by the filter press (14).
9. The integrated sludge treatment system according to claim 8, wherein the temporary slurry tank (5) is provided with a slurry pumping pipe (2), and the slurry pumping pipe (2) and communication pipelines between the temporary slurry tank (5), the curing agent stirring tank (9), the flocculating agent stirring tank (13) and the filter press (14) which are connected in sequence are provided with feed flow valves; the curing agent delivery device comprises a curing agent flow valve (8), and the flocculating agent delivery device comprises a flocculating agent flow valve (12).
10. The integrated sludge slurry treatment system according to claim 9, wherein the granulating device (16), the curing agent feeding device, the flocculant feeding device, the stirring device, and the feed flow valve are connected to a programmable logic controller or a computer.
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| CN202010172695.7A CN111268875A (en) | 2020-03-12 | 2020-03-12 | Silt slurry treatment method and integrated system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723906A (en) * | 2021-01-21 | 2021-04-30 | 宁波大学 | Preparation and construction method of light filler based on building slurry |
| CN113024073A (en) * | 2021-03-04 | 2021-06-25 | 中建水务环保有限公司 | Method for solidifying sludge based on plate-and-frame filter press |
| CN113045151A (en) * | 2021-03-24 | 2021-06-29 | 国网江苏省电力有限公司建设分公司 | Method and device for treating sand-rich slurry and converting sand-rich slurry into filler |
| CN113082846A (en) * | 2021-03-26 | 2021-07-09 | 路德环境科技股份有限公司 | Impurity-removing and purifying process and purifying device for alkaline residue of ammonia-soda plant |
| CN113415969A (en) * | 2021-06-29 | 2021-09-21 | 国网江苏省电力有限公司建设分公司 | Integrated treatment and filler utilization method for waste mud or slag in power grid construction |
| CN113442291A (en) * | 2021-06-25 | 2021-09-28 | 浙江大学 | Production process for solidifying and regenerating roadbed filler by sludge muck |
| CN113800735A (en) * | 2021-09-29 | 2021-12-17 | 山东尚科环境工程有限公司 | Industrial sludge solidification treatment method |
| CN113998850A (en) * | 2021-10-28 | 2022-02-01 | 广东棣业建设集团有限公司 | Municipal sludge dewatering and curing method |
| CN114835367A (en) * | 2022-05-07 | 2022-08-02 | 国网江苏省电力有限公司建设分公司 | Preparation method and device of solidified earthwork mud bag for filler |
| CN115635577A (en) * | 2022-11-11 | 2023-01-24 | 武汉大学 | Method for preparing composite foundation treatment pile body segment by modifying waste fluid mud residue |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112723906A (en) * | 2021-01-21 | 2021-04-30 | 宁波大学 | Preparation and construction method of light filler based on building slurry |
| CN113024073A (en) * | 2021-03-04 | 2021-06-25 | 中建水务环保有限公司 | Method for solidifying sludge based on plate-and-frame filter press |
| CN113045151A (en) * | 2021-03-24 | 2021-06-29 | 国网江苏省电力有限公司建设分公司 | Method and device for treating sand-rich slurry and converting sand-rich slurry into filler |
| CN113082846A (en) * | 2021-03-26 | 2021-07-09 | 路德环境科技股份有限公司 | Impurity-removing and purifying process and purifying device for alkaline residue of ammonia-soda plant |
| CN113442291A (en) * | 2021-06-25 | 2021-09-28 | 浙江大学 | Production process for solidifying and regenerating roadbed filler by sludge muck |
| CN113415969A (en) * | 2021-06-29 | 2021-09-21 | 国网江苏省电力有限公司建设分公司 | Integrated treatment and filler utilization method for waste mud or slag in power grid construction |
| CN113800735A (en) * | 2021-09-29 | 2021-12-17 | 山东尚科环境工程有限公司 | Industrial sludge solidification treatment method |
| CN113998850A (en) * | 2021-10-28 | 2022-02-01 | 广东棣业建设集团有限公司 | Municipal sludge dewatering and curing method |
| CN114835367A (en) * | 2022-05-07 | 2022-08-02 | 国网江苏省电力有限公司建设分公司 | Preparation method and device of solidified earthwork mud bag for filler |
| CN115635577A (en) * | 2022-11-11 | 2023-01-24 | 武汉大学 | Method for preparing composite foundation treatment pile body segment by modifying waste fluid mud residue |
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