CN110563294A - Integrated treatment process and system for dewatering and drying river and lake sludge - Google Patents
Integrated treatment process and system for dewatering and drying river and lake sludge Download PDFInfo
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- CN110563294A CN110563294A CN201910909232.1A CN201910909232A CN110563294A CN 110563294 A CN110563294 A CN 110563294A CN 201910909232 A CN201910909232 A CN 201910909232A CN 110563294 A CN110563294 A CN 110563294A
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- dredger
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
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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
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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
-
- 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
-
- 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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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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
- C02F11/14—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
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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
- C02F11/14—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
- C02F11/145—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/10—Devices for removing the material from the surface
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
- E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
- E02F3/9231—Suction wheels with axis of rotation parallel to longitudinal axis of the suction pipe
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
The invention discloses a river and lake sludge dewatering and drying integrated treatment process and system, which comprises garbage cleaning, bottom sludge disinfection, bottom sludge improvement, bottom sludge excavation, sludge-water separation, bottom sludge dehydration and bottom sludge drying, wherein the river and lake sludge is fully crushed by a sludge crushing mechanism, the crushed sludge is fully sucked out by a sludge suction mechanism, the sucked sludge enters a sedimentation tank for sedimentation, the sludge is dewatered under the action of a dewatering mechanism, the concentrated sludge is conveyed to a solidification tank for solidification, a curing agent and a coagulant are conveyed to the solidification tank together, the concentrated sludge and a solidification material are fully stirred to obtain solidified soil, the solidified soil is filled into a sludge bag, the sludge does not fall to the ground, does not need to be stockpiled, does not have secondary pollution in the whole operation process, pollution control, dewatering and drying of the sludge are realized through physical dewatering, heat treatment and solidification treatment, the sludge treatment efficiency is higher, effectively solves the problem of sludge disposal and utilization, thereby realizing the solidification treatment and utilization and ecological treatment of the sludge in rivers and lakes.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a river and lake sludge dewatering and drying integrated treatment process and system.
Background
with the continuous development of the country and the advancement of science and technology, China has made a huge development in the economic field, but has many defects in the aspects of the overall planning and use of natural water bodies and the reparation and perfection of hydraulic engineering. Some rivers and lakes in China are raised on the river bed and the bottom of the lake due to the fact that the water flow speed is low, and particularly, silt is continuously deposited in winter and spring. In recent years, the problem of water body siltation is increasingly serious, silt in various water bodies such as rivers, lakes, channels, reservoirs, channels, harbors and the like is silted up and mixed with sundries such as branches, bricks, plastic bags and the like, so that the water body flows slowly or does not flow, the garbage is mixed in the water body to generate odor, the smoothness of the water channel is influenced, the life quality of nearby residents is influenced, and the water body desilting and treating work is increasingly emphasized.
under the condition that people have slight awareness of ecological environment protection, the generation amount of river and lake silted sludge is increasing along with the development of society day by day, and the normal play of various functions such as flood control, waterlogging drainage, irrigation, water supply, navigation and the like is increasingly influenced, the existence of river and lake silting causes that a river bed becomes shallow, the water storage amount becomes less, river water becomes odorous, the environment is damaged, the water quality is reduced, the daily life of residents is directly influenced, the continuous development of agriculture is restricted, and the requirements of the masses on treating the river and the lake and improving the water resource environment are very urgent. In order to restore the normal functions of rivers and lakes and promote the rapid and continuous development of the economic society, the dredging engineering of rivers and lakes is carried out, so that the rivers and lakes become deeper and wider through treatment, and river water becomes clear, which becomes an urgent priority for the current environmental treatment. Most of the traditional sludge disposal methods are to select proper addresses to pile nearby or transport outside, but because the sludge contains a large amount of water, the fluidity of the sludge is very large, and the volume of the sludge is also very large, a large area of piling site is needed, and various pollutants contained in the sludge easily cause secondary pollution to the environment.
disclosure of Invention
in order to overcome the defects in the prior art, the invention aims to provide a river and lake sludge dewatering and drying integrated treatment system, which can start to comprehensively cure sludge in a short time, has good dewatering and curing effects, high sludge treatment efficiency and low cost, and does not produce secondary pollution.
In order to solve the technical problem, the invention provides a river and lake sludge dewatering and drying integrated treatment process, which comprises the following steps:
Cleaning garbage, namely cleaning the garbage and water hyacinth on the sides of the river and lake and on the water surface to clean the water surface;
Sterilizing the bottom mud, and using 0.18-0.22 kg/m of quicklime for the average water depth of 1m2the quicklime is put into a wooden barrel or a water vat for melting and then is immediately sprayed over the whole river;
Improving the bottom mud, namely preparing the bottom mud modifier into liquid by using river water or tap water and spraying the liquid, wherein the adding amount is 10-100 g/m3；
excavating bottom mud, namely breaking and scattering the mud at the river bottom by using a mud crushing mechanism at the front end of a dredger, and sucking the mud onto the dredger by using a mud sucking mechanism at the rear end of the dredger;
separating mud from water, namely settling the sludge dug up by using a settling pond, purifying liquid at the upper end of the settling pond, and discharging the treated clear liquid into a river;
dehydrating the bottom mud, and rapidly dehydrating the mud at the lower end of the sedimentation tank by using a dehydration mechanism;
drying the bottom mud, namely drying the bottom mud by adopting a curing tank, respectively conveying a curing agent and a coagulant into the curing tank, fully stirring the dehydrated concentrated sludge, the curing agent and the coagulant to obtain cured soil, and filling the cured soil into mud bags.
Furthermore, a driving motor on the dredger drives a mud crushing cylinder of the mud crushing mechanism to rotate, and mud stirring blades distributed circumferentially of the mud crushing cylinder are driven to rotate, so that bottom mud at the bottom of the river is crushed.
Furthermore, the rotation shaft of the mud suction mechanism is rotated, the first propelling blade and the second propelling blade on two sides of the rotation shaft push the broken bottom mud to the dredging sucker of the mud suction pipe in the middle of the rotation shaft, and the mud is sucked by the mud suction pump and the dredging sucker.
optionally, the position of the sludge crushing barrel in water is adjusted through a traction mechanism on the dredger, and a winch of the traction mechanism drives the sludge crushing barrel to move through a steel wire rope and a pulley.
specifically, the heat in the combustion chamber of the dewatering mechanism is conducted to the dewatering chamber through the first heat conduction pipe and the first heat conduction pipe, and the rotating shaft and the spiral blade in the dewatering chamber stir and dewater the sludge.
optionally, the curing agent comprises, by weight, 10-15 parts of cement, 10-15 parts of quick lime, 3-8 parts of polyaluminum chloride, 5-10 parts of montmorillonite, 2-5 parts of gypsum, 5-10 parts of hydrogel and 5-10 parts of expanded graphite;
the coagulant comprises 10-20% of sodium hydroxide solution and 10-20% of sodium sulfate solution by weight, wherein the weight of solute sodium hydroxide in the sodium hydroxide solution is 0.6-1.0% of the weight of the cement in the curing agent, and the weight of solute sodium sulfate in the sodium sulfate solution is 0.3-0.6% of the weight of the cement in the curing agent.
Correspondingly, the invention also provides a river and lake sludge dewatering and drying integrated treatment system, which comprises a dredger, a sludge crushing mechanism positioned at the front end of the dredger and a sludge suction mechanism positioned at the rear end of the dredger;
The dredger is also provided with a sedimentation tank, a dewatering mechanism and a curing tank which are sequentially connected, wherein the sedimentation tank is connected with the sludge suction mechanism;
the mud crushing mechanism comprises a mud crushing barrel and mud stirring blades which are uniformly distributed along the outer circumference of the mud crushing barrel, and two ends of the mud crushing barrel are connected with a driving motor on the dredger through chains;
the mud suction mechanism comprises a mud suction pipe arranged at the bottom of the dredger and a mud suction pump communicated with the mud suction pipe, the top end of the mud suction pipe is connected with the mud suction pump through a telescopic pipe, and the bottom end of the mud suction pipe is provided with a dredging sucker; the disc opening of the dredging sucker is positioned in the middle of the rotating shaft, a first propelling blade and a second propelling blade which rotate in opposite directions are formed on two sides of the rotating shaft, and the first propelling blade and the second propelling blade are obliquely arranged towards the disc opening of the dredging sucker;
The dredger is also provided with a traction mechanism for adjusting the position of the sludge crushing barrel in water;
The dehydration mechanism comprises a barrel, a combustion chamber is arranged on one side inside the barrel, a dehydration chamber is arranged on the other side inside the barrel, a rotating shaft is arranged in the middle of the dehydration chamber, spiral blades are arranged on the outer surface of the rotating shaft, and a first heat conduction pipe communicated with the combustion chamber is arranged inside the rotating shaft.
preferably, the traction mechanism comprises a winch fixed on the dredger and a pulley connected with the winch through a steel wire rope, and the pulley is positioned at the bow of the dredger;
One end of the steel wire rope is connected to the winch, and the other end of the steel wire rope is fixed to the sludge crushing barrel.
Preferably, a filter screen and a grating fence are arranged in the dredging sucker from bottom to top.
Optionally, a second heat pipe communicated with the combustion chamber is wound around the dehydration chamber;
And a blower is arranged on one side of the combustion chamber and used for blowing heat in the combustion chamber to the interior of the second heat conduction pipe.
compared with the prior art, the invention has the beneficial effects that:
The river and lake sludge dewatering and drying integrated treatment process and system provided by the invention have the advantages that sludge at the bottom of a river is fully crushed through the sludge crushing mechanism, then the crushed sludge is fully sucked out through the sludge suction mechanism to thoroughly clean the sludge at the bottom of the river, the sucked sludge enters the sedimentation tank to be precipitated, the later dewatering operation is facilitated, dewatering is carried out under the combined action of the combustion chamber and the dewatering chamber of the dewatering mechanism, the dewatering speed of the sludge is remarkably improved, the concentrated sludge is conveyed to the solidification tank to be solidified, the solidifying agent and the coagulating agent are conveyed to the solidification tank together, the concentrated sludge and the solidifying material are fully stirred to obtain solidified soil, and the solidified soil is filled into mud bags. The integrated treatment process for dewatering and drying the river and lake sludge has the advantages of good dewatering and curing effects, high sludge treatment efficiency, low cost, no landing of the sludge in the whole operation process, no need of a storage yard and no secondary pollution, realizes pollution control, dewatering and drying of the sludge through physical dewatering, heat treatment and curing treatment, has higher sludge treatment efficiency, effectively solves the problem of sludge disposal and utilization, and further realizes solidification treatment and utilization and ecological treatment of the river and lake sludge.
Drawings
in order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of an integrated dewatering and drying treatment process for river and lake sludge according to an embodiment of the invention.
fig. 2 is a schematic structural diagram of a river and lake sludge dewatering and drying integrated treatment system provided by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In urban river and lake dredging engineering, the sludge storage yard is difficult to use, and a rapid drying process which occupies a small area and can be operated continuously is preferably selected for sludge treatment, so that the occupied area and peripheral pollution are reduced to the maximum extent. Meanwhile, due to historical reasons such as regional industrial structures and the like, the heavy metal content in the river and lake bottom sludge in the lamellar region is high. Therefore, in the process of disposing the dredging sediment, the heavy metals in the sediment need to be immobilized, so that the heavy metals are not dissolved out and reach the specified limit in the soil environmental quality standard (GB 15618-1995).
Therefore, the invention provides a river and lake sludge dewatering and drying integrated treatment process and a system, as shown in figure 1, the river and lake sludge dewatering and drying integrated treatment process comprises the following steps:
s10, cleaning the garbage, namely cleaning the existing garbage and water hyacinth on the sides of the river, lake and water surface to clean the water surface and the water environment.
S20, sterilizing bottom mud, and using 0.18-0.22 kg/m of quicklime for average water depth of 1m2The quicklime is put into a wooden barrel or a water vat for melting and then is sprayed all over the river.
S30, improving the bottom mud, namely preparing the bottom mud improving agent into liquid with river water or tap water for spraying, wherein the adding amount is 10-100 g/m3。
And S40, excavating bottom mud, namely breaking and scattering the mud at the river bottom by using the mud crushing mechanism 20 at the front end of the dredger, and sucking the mud onto the dredger 10 by using the mud sucking mechanism 30 at the rear end of the dredger. Specifically, a driving motor on the dredger 10 drives a sludge crushing cylinder 21 of the sludge crushing mechanism 20 to rotate, and drives sludge stirring blades 22 distributed in the circumferential direction of the sludge crushing cylinder to rotate, so as to crush bottom sludge at the bottom of a river. The position of the sludge crushing barrel 21 in the water is adjusted by a traction mechanism on the dredger 10, a winch 71 of the traction mechanism drives the sludge crushing barrel 21 to move through a steel wire rope 72 and a pulley 73, and the sludge crushing mechanism 20 is placed at a proper position so as to crush the sludge at the river bottom more conveniently. The rotating shaft 35 of the sludge suction mechanism 30 is rotated, and the first propelling blade 36 and the second propelling blade 37 on both sides of the rotating shaft 35 push the broken bottom sludge to the dredging suction cup 34 of the sludge suction pipe 31 located at the middle position of the rotating shaft, so that the sludge is sucked by the sludge suction pump 32 and the dredging suction cup 34.
And S50, separating mud and water, namely, settling the sludge dug up by using the sedimentation tank 40, purifying the liquid at the upper end of the sedimentation tank, and discharging the processed clear liquid into a river.
S60, dehydrating the bottom mud, and rapidly dehydrating the mud at the lower end of the sedimentation tank by using a dehydration mechanism 50; the heat in the combustion chamber 52 of the dehydration mechanism 50 is conducted to the dehydration chamber through the first heat conduction pipe and the first heat conduction pipe, and the rotation shaft 53 and the spiral blade 54 in the dehydration chamber agitate and dehydrate the sludge.
s70, drying the bottom mud by adopting a curing tank 60, respectively conveying a curing agent and a coagulant into the curing tank, fully stirring the dehydrated concentrated mud, the curing agent and the coagulant to obtain cured soil, and filling the cured soil into mud bags. Wherein, the curing agent comprises 10-15 parts of cement, 10-15 parts of quicklime, 3-8 parts of polyaluminium chloride, 5-10 parts of montmorillonite, 2-5 parts of gypsum, 5-10 parts of hydrogel and 5-10 parts of expanded graphite according to weight ratio; the coagulant comprises 10-20% of sodium hydroxide solution and 10-20% of sodium sulfate solution by weight, wherein the weight of solute sodium hydroxide in the sodium hydroxide solution is 0.6-1.0% of the weight of the cement in the curing agent, and the weight of solute sodium sulfate in the sodium sulfate solution is 0.3-0.6% of the weight of the cement in the curing agent. The preparation method of the curing agent comprises the steps of mixing, by weight, 10-15 parts of cement, 10-15 parts of quick lime, 3-8 parts of polyaluminum chloride, 5-10 parts of montmorillonite and 2-5 parts of gypsum, uniformly stirring, then putting into a heating furnace for heating at 180-200 ℃ for 30min, cooling, mixing with 5-10 parts of hydrogel and 5-10 parts of expanded graphite, and uniformly stirring to obtain the curing agent. The sludge curing agent disclosed by the invention can reduce the water content of the sludge with high water content, can effectively reduce the internal strain of the cured sludge and prevent cracking, is high in curing strength and short in curing time, can realize quick setting and hardening, solves the problems of environmental pollution and the like caused by deposition of a large amount of sludge, and is energy-saving and environment-friendly.
As shown in fig. 2, the integrated river and lake sludge dewatering and drying treatment system of the present invention includes a dredger 10, a sludge breaking mechanism 20 located at the front end of the dredger, and a sludge suction mechanism 30 located at the rear end of the dredger, wherein the dredger 10 is further provided with a settling pond 40, a dewatering mechanism 50, and a solidification tank 60, which are sequentially connected, and the settling pond 40 is connected with the sludge suction mechanism 20.
Specifically, the mud crushing mechanism 20 of the present invention comprises a mud crushing barrel 21 and mud stirring blades 22 uniformly distributed along the outer circumference of the mud crushing barrel, wherein two ends of the mud crushing barrel 21 are connected with a driving motor on a dredger through chains 23, and the driving motor works to drive the mud crushing barrel 21 to rotate for mud crushing operation. The mud sucking mechanism 30 comprises a mud sucking pipe 31 arranged at the bottom of the dredger and a mud sucking pump 32 communicated with the mud sucking pipe 31, the top end of the mud sucking pipe 31 is connected with the mud sucking pump 32 through a telescopic pipe 33, the bottom end of the mud sucking pipe 31 is provided with a dredging sucker 34, wherein the disc opening of the dredging sucker 34 is positioned in the middle of a rotating shaft 35, a first propelling blade 36 and a second propelling blade 37 which are opposite in rotation direction are formed on two sides of the rotating shaft 35, the first propelling blade 36 and the second propelling blade 37 are both arranged obliquely towards the disc opening of the dredging sucker, the broken mud is simultaneously pushed to the disc opening of the dredging sucker 34 through the first propelling blade 36 and the second propelling blade 37 and is sucked into the mud sucking pipe 31, so that the mud can form an impact area in the middle of the rotating shaft 35, the mud is highly dense in the area, and the mud is convenient to be sucked by the mud sucking pump 32, the mud propelling content is higher, thereby the mud cleaning of river bottom is simpler and more effective, and the work efficiency is higher. The filter screen and the grating fence are arranged in the dredging sucker 34 from bottom to top, so that the dredging sucker 34 can be prevented from being blocked by sludge, the interruption of work is caused, the work efficiency is improved, the maintenance cost is reduced, large particles, clothes or plastic bags in water can be filtered through the design of the filter screen and the grating fence, the blockage of equipment is avoided, and the service life is prolonged.
The dredger 10 of the invention is also provided with a traction mechanism for adjusting the position of the crushed mud drum in water, the traction mechanism comprises a winch 71 fixed on the dredger and a pulley 73 connected with the winch 71 through a steel wire 72, the pulley 73 is positioned at the bow of the dredger, one end of the steel wire 72 is connected with the winch 71, and the other end is fixed on the crushed mud drum 21. The mud crushing mechanism 20 can be placed at a proper position according to the water depth of rivers and lakes through the traction mechanism, so that mud at the bottom of the river can be crushed more conveniently.
The dehydration mechanism 50 comprises a cylinder body 51, wherein a combustion chamber 52 is arranged at one side inside the cylinder body 51, a dehydration chamber is arranged at the other side inside the cylinder body 51, a treatment box 80 is arranged at the top of the cylinder body 51, and one side of the treatment box 80 is connected with the inside of the cylinder body 51 through a gas guide pipe 81. Waste gas and fine dust inside the cylinder 51 are conducted to the treatment box 80 through the air guide pipe 81, the waste gas is decomposed through chemical reaction inside the cylinder and converted into harmless gas, dust is deposited, and then the waste gas and the harmless gas are discharged out of the cylinder 51, so that the purpose of protecting the environment is achieved.
In addition, the top of the cylinder 51 is also provided with a sludge inlet connected with the outlet of the sedimentation tank 40, the flocculated sludge enters the dewatering mechanism 50 through the sludge inlet for dewatering, and the bottom of the cylinder 51 is fixed with a water outlet. The intermediate position of dehydration chamber is equipped with pivot 53, the surface of pivot 53 is equipped with helical blade 54, helical blade 54's surface is the heliciform, and promotion silt that can be slow increases the area of contact of silt and the inside air of dehydration chamber for dehydration efficiency. The inside of pivot 53 have with the first heat pipe of combustion chamber intercommunication, the winding all around of dehydration room have with the second heat pipe of combustion chamber intercommunication, and, one side of combustion chamber is equipped with air-blower 90 for blow the heat in the combustion chamber to inside the second heat pipe, can be in very short time the heat conduction in the combustion chamber to the dehydration room inside through first heat pipe and second heat pipe, accelerate the dehydration speed of silt, improve dehydration efficiency.
the river and lake sludge dewatering and drying integrated treatment process and system provided by the invention have the advantages that sludge at the bottom of a river is fully crushed through the sludge crushing mechanism, then the crushed sludge is fully sucked out through the sludge suction mechanism to thoroughly clean the sludge at the bottom of the river, the sucked sludge enters the sedimentation tank to be precipitated, the later dewatering operation is facilitated, dewatering is carried out under the combined action of the combustion chamber and the dewatering chamber of the dewatering mechanism, the dewatering speed of the sludge is remarkably improved, the concentrated sludge is conveyed to the solidification tank to be solidified, the solidifying agent and the coagulating agent are conveyed to the solidification tank together, the concentrated sludge and the solidifying material are fully stirred to obtain solidified soil, and the solidified soil is filled into mud bags. The integrated treatment process for dewatering and drying the river and lake sludge has the advantages of good dewatering and curing effects, high sludge treatment efficiency, low cost, no landing of the sludge in the whole operation process, no need of a storage yard and no secondary pollution, realizes pollution control, dewatering and drying of the sludge through physical dewatering, heat treatment and curing treatment, has higher sludge treatment efficiency, effectively solves the problem of sludge disposal and utilization, and further realizes solidification treatment and utilization and ecological treatment of the river and lake sludge.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A river and lake sludge dewatering and drying integrated treatment process is characterized in that: the method comprises the following steps:
Cleaning garbage, namely cleaning the garbage and water hyacinth on the sides of the river and lake and on the water surface to clean the water surface;
sterilizing the bottom mud, and using 0.18-0.22 kg/m of quicklime for the average water depth of 1m2The quicklime is put into a wooden barrel or a water vat for melting and then is immediately sprayed over the whole river;
Improving the bottom mud, namely preparing the bottom mud modifier into liquid by using river water or tap water and spraying the liquid, wherein the adding amount is 10-100 g/m3；
Excavating bottom mud, namely breaking and scattering the mud at the river bottom by using a mud crushing mechanism at the front end of a dredger, and sucking the mud onto the dredger by using a mud sucking mechanism at the rear end of the dredger;
Separating mud from water, namely settling the sludge dug up by using a settling pond, purifying liquid at the upper end of the settling pond, and discharging the treated clear liquid into a river;
dehydrating the bottom mud, and rapidly dehydrating the mud at the lower end of the sedimentation tank by using a dehydration mechanism;
Drying the bottom mud, namely drying the bottom mud by adopting a curing tank, respectively conveying a curing agent and a coagulant into the curing tank, fully stirring the dehydrated concentrated sludge, the curing agent and the coagulant to obtain cured soil, and filling the cured soil into mud bags.
2. The integrated river and lake sludge dewatering and drying treatment process according to claim 1, characterized in that: the driving motor on the dredger drives the mud crushing barrel of the mud crushing mechanism to rotate, and the mud stirring blades distributed in the circumferential direction of the mud crushing barrel are driven to rotate, so that the bottom mud at the bottom of the river is crushed.
3. The integrated river and lake sludge dewatering and drying treatment process according to claim 2, characterized in that: the rotation of inhaling mud mechanism, the first propulsion blade and the second of rotation axis both sides impel the blade and with broken bed mud propelling movement to being located the desilting sucking disc department of the suction pipe of the intermediate position of rotation axis absorbs silt through dredge pump and desilting sucking disc.
4. The integrated river and lake sludge dewatering and drying treatment process according to claim 2, characterized in that: the position of the sludge crushing barrel in water is adjusted through a traction mechanism on the dredger, and a winch of the traction mechanism drives the sludge crushing barrel to move through a steel wire rope and a pulley.
5. The integrated river and lake sludge dewatering and drying treatment process according to claim 1, characterized in that: the heat in the combustion chamber of the dewatering mechanism is conducted to the dewatering chamber through the first heat conduction pipe and the first heat conduction pipe, and the rotating shaft and the spiral blade in the dewatering chamber stir and dewater the sludge.
6. the integrated river and lake sludge dewatering and drying treatment process according to claim 1, characterized in that: the curing agent comprises 10-15 parts of cement, 10-15 parts of quicklime, 3-8 parts of polyaluminium chloride, 5-10 parts of montmorillonite, 2-5 parts of gypsum, 5-10 parts of hydrogel and 5-10 parts of expanded graphite according to weight ratio;
the coagulant comprises 10-20% of sodium hydroxide solution and 10-20% of sodium sulfate solution by weight, wherein the weight of solute sodium hydroxide in the sodium hydroxide solution is 0.6-1.0% of the weight of the cement in the curing agent, and the weight of solute sodium sulfate in the sodium sulfate solution is 0.3-0.6% of the weight of the cement in the curing agent.
7. The utility model provides a river lake silt dehydration mummification integration processing system which characterized in that: comprises a dredger, a mud crushing mechanism positioned at the front end of the dredger and a mud sucking mechanism positioned at the rear end of the dredger;
The dredger is also provided with a sedimentation tank, a dewatering mechanism and a curing tank which are sequentially connected, wherein the sedimentation tank is connected with the sludge suction mechanism;
The mud crushing mechanism comprises a mud crushing barrel and mud stirring blades which are uniformly distributed along the outer circumference of the mud crushing barrel, and two ends of the mud crushing barrel are connected with a driving motor on the dredger through chains;
The mud suction mechanism comprises a mud suction pipe arranged at the bottom of the dredger and a mud suction pump communicated with the mud suction pipe, the top end of the mud suction pipe is connected with the mud suction pump through a telescopic pipe, and the bottom end of the mud suction pipe is provided with a dredging sucker; the disc opening of the dredging sucker is positioned in the middle of the rotating shaft, a first propelling blade and a second propelling blade which rotate in opposite directions are formed on two sides of the rotating shaft, and the first propelling blade and the second propelling blade are obliquely arranged towards the disc opening of the dredging sucker;
the dredger is also provided with a traction mechanism for adjusting the position of the sludge crushing barrel in water;
The dehydration mechanism comprises a barrel, a combustion chamber is arranged on one side inside the barrel, a dehydration chamber is arranged on the other side inside the barrel, a rotating shaft is arranged in the middle of the dehydration chamber, spiral blades are arranged on the outer surface of the rotating shaft, and a first heat conduction pipe communicated with the combustion chamber is arranged inside the rotating shaft.
8. The integrated river and lake sludge dewatering and drying treatment system according to claim 7, characterized in that: the traction mechanism comprises a winch fixed on the dredger and a pulley connected with the winch through a steel wire rope, and the pulley is positioned at the bow of the dredger;
One end of the steel wire rope is connected to the winch, and the other end of the steel wire rope is fixed to the sludge crushing barrel.
9. The integrated river and lake sludge dewatering and drying treatment system according to claim 7, characterized in that: a filter screen and a grating fence are arranged in the dredging sucker from bottom to top.
10. The integrated river and lake sludge dewatering and drying treatment system according to claim 7, characterized in that: a second heat conduction pipe communicated with the combustion chamber is wound around the dehydration chamber;
And a blower is arranged on one side of the combustion chamber and used for blowing heat in the combustion chamber to the interior of the second heat conduction pipe.
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