CN112107919A - River and lake environment-friendly dredging and curing system - Google Patents

Abstract

The invention discloses a river and lake dredging and curing system, which comprises a cutter suction boat, a sedimentation tank, a conditioning tank, an aeration stirring tank and a slurry dewatering and curing system, wherein the sludge dewatering and curing system comprises a sludge conveying device, a sludge conveying device and a sludge conveying device; the cutter suction boat is communicated with the sedimentation tank, and sludge at the bottom of a river or lake is twisted into slurry by the cutter suction boat and conveyed to the sedimentation tank; the sedimentation tank is used for naturally sedimentating mud; the conditioning tank is communicated with the sedimentation tank, and the aeration stirring tank is communicated with the conditioning tank; the slurry dehydration and solidification system is connected with the aeration stirring tank to carry out dehydration and solidification treatment on the slurry conveyed by the aeration stirring tank. The system can improve the construction efficiency of dredging and curing and save the construction cost.

Description

River and lake environment-friendly dredging and curing system

Technical Field

The invention relates to the field of sludge treatment systems. More particularly, the invention relates to an environment-friendly dredging and solidifying system for rivers and lakes.

Background

At present, the process of removing sludge at the bottom of rivers and lakes by adopting a cutter suction dredger and the like in combination with sludge dewatering equipment is mature, but still has some defects: because only the cutter suction boat is used for cutter suction and no treatment is carried out on the slurry, when subsequent slurry enters the plate-and-frame filter press, the damage rate of filter cloth of dewatering equipment such as the plate-and-frame filter press is high due to overlarge particle size of part of solid particles.

Disclosure of Invention

To achieve these objects and other advantages in accordance with the present invention, there is provided a river and lake dredging solidification system, comprising a cutter suction vessel, a settling tank, a conditioning tank, an aeration stirring tank, and a slurry dewatering solidification system;

the cutter suction boat is communicated with the sedimentation tank, and sludge at the bottom of a river or lake is twisted into slurry by the cutter suction boat and conveyed to the sedimentation tank; the sedimentation tank is used for naturally sedimentating mud;

the conditioning tank is communicated with the sedimentation tank, and the aeration stirring tank is communicated with the conditioning tank;

the slurry dehydration and solidification system is connected with the aeration stirring tank to carry out dehydration and solidification treatment on the slurry conveyed by the aeration stirring tank.

According to a preferred embodiment of the invention, the river and lake dredging and solidifying system further comprises a mud cake transfer system and a mud cake stacking yard, wherein the mud cake transfer system transfers the mud cakes conveyed by the mud dewatering and solidifying system to the mud cake stacking yard.

According to a preferred embodiment of the present invention, the river and lake dredging and solidifying system further comprises a slurry filtration system, which comprises a primary filtration system located between the cutter-suction dredger and the sedimentation tank, a secondary filtration system located between the sedimentation tank and the conditioning tank, a tertiary filtration system located between the conditioning tank and the aeration stirring tank, and a quaternary filtration system located between the aeration stirring tank and the slurry dewatering and solidifying system.

According to a preferred embodiment of the invention, the river and lake dredging and curing system and the slurry dewatering and curing system are composed of an air compressor, a plate-and-frame filter press and a supporting frame; the air compressor presses compressed air into the plate-and-frame filter press and presses the compressed air into mud cakes with the water content meeting the requirements; the support frame is used for supporting the plate and frame filter press, just the support frame below is equipped with accommodation space, as the space of mud cake play department and transportation mud cake.

According to a preferred embodiment of the invention, the mud cake transfer system of the river and lake dredging and solidifying system comprises a small trailer, a weighing sensor, a control unit and an alarm device, wherein the small trailer is placed below an outlet of the plate-and-frame filter press and used for collecting mud cakes; the weighing sensor is pre-embedded under the ground below the small trailer and is used for measuring the weight of the small trailer after the small trailer is filled with mud cakes; the control unit is connected to the weighing sensor and the alarm device, and controls the alarm device to give an alarm sound if the weight detected by the weighing sensor reaches a preset value.

According to a preferred embodiment of the present invention, the river and lake dredging solidification system comprises a curing agent and a dehydrating agent which are put into the conditioning tank.

According to a preferred embodiment of the present invention, the first-stage filtration system, the second-stage filtration system, the third-stage filtration system and the fourth-stage filtration system each comprise a placing tank, wherein a filter plate is obliquely placed in the placing tank, and the filter plate covers a water outlet of the placing tank.

According to a preferred embodiment of the present invention, in the river and lake dredging and solidifying system, the upper end of the filter plate extends out of the placing tank, and the filter plate is detachably arranged.

According to a preferred embodiment of the invention, the filter plate comprises two layers of filter screens which are parallel and spaced from each other, and the side edges of the two layers of filter screens are further connected through a first spring; the meshes of the two layers of filter screens are staggered, dredging needles are respectively arranged on the surfaces, close to each other, of the two layers of filter screens, the dredging needles on each layer of filter screen respectively correspond to the filter holes on the other filter screen one by one, and when the two layers of filter screens are close to each other, the dredging needles on one filter screen dredge the meshes of the other filter screen; the dredging needle comprises a main rod and a plurality of blocking pieces, one end of the main rod is fixed on the filter screen, the blocking pieces are hinged to the other end of the main rod, a gap is reserved between every two adjacent blocking pieces, and the blocking pieces are connected with the main rod through a second spring;

a telescopic sleeve is sleeved outside the first spring, and two ends of the telescopic sleeve are respectively connected to the two layers of filter screens;

when the first spring is in a natural extension state, the dredging needle on one filter screen is not contacted with the other filter screen; when the first spring is compressed to a preset degree, the dredging needle on one filter screen extends into the corresponding mesh on the other filter screen to dredge the mesh.

The invention at least comprises the following beneficial effects:

(1) reliability: the four-level slurry filtering system can effectively reduce the damage rate of the filter cloth of the dewatering equipment.

(2) Economy, energy conservation: compared with the conventional dehydration and solidification system, a belt conveyor, a bulldozer, an aggregate device and the like, the mud dehydration and solidification system and the mud cake transfer system have the advantages of land occupation saving, energy saving and protection, labor investment reduction and the like in mud cake collection and transfer operation.

(3) The application range is wide: the invention has better applicability when the environment-friendly dredging and curing are carried out on rivers, lakes and the like.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of a river and lake dredging and solidifying system according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic structural diagram of a filter plate according to an embodiment of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

As shown in fig. 1-3, the river and lake dredging and solidifying system of the present invention comprises a cutter suction ship 1, a sedimentation tank 2, a conditioning tank 3, an aeration stirring tank 4 and a slurry dewatering and solidifying system 5;

the cutter suction dredger 1 is communicated with the sedimentation tank 2 through a pipeline, sludge at the bottom of a river or lake is twisted into slurry by the cutter suction dredger 1, and the slurry is conveyed to the sedimentation tank 2; the sedimentation tank 2 is used for naturally sedimentating mud;

the conditioning tank 3 is communicated with the sedimentation tank 2 through a pipeline, and the aeration stirring tank 4 is communicated with the conditioning tank 3;

the slurry dewatering and solidifying system 5 is connected to the aeration stirring tank 4 to dewater and solidify the slurry conveyed through the aeration stirring tank 4.

The mud filtering system comprises a first-stage filtering system 710 positioned between the cutter suction dredger 1 and the sedimentation tank 2, a second-stage filtering system 720 positioned between the sedimentation tank 2 and the conditioning tank 3, a third-stage filtering system 730 positioned between the conditioning tank 3 and the aeration stirring tank 4, and a fourth-stage filtering system 740 positioned between the aeration stirring tank 4 and the mud dewatering and solidifying system 5.

A mud cake transfer system and a mud cake stacking yard 9, wherein the mud cake transfer system transfers the mud cakes conveyed by the mud dewatering and curing system 5 to the mud cake stacking yard.

In the above embodiment, the cutter-suction dredger 1 cuts the sludge and water into a sludge-water mixture, conveys the sludge-water mixture to the primary filtering system 710 through a pipeline, and enters the sedimentation tank 2 after filtering to perform sufficient natural sedimentation; then the slurry after natural precipitation is conveyed to a secondary filtering system 720, and enters a conditioning pool 3 after being filtered, and chemical agents such as a strengthening agent, a dehydrator and the like are conditioned; conveying the conditioned slurry to a third-stage filtering system 730, filtering, and then entering an aeration stirring tank 4 to uniformly stir the slurry for full reaction; the slurry which is fully reacted is conveyed to a four-stage filtering system 740, and enters a slurry dewatering and curing system 5 after being filtered, and the slurry is dewatered and cured into a mud cake with the water content meeting the requirement;

according to a preferred embodiment of the present invention, the river and lake dredging and solidifying system, the slurry dewatering and solidifying system 5, is composed of an air compressor 510, a plate-and-frame filter press 520 and a supporting frame 530; the air compressor 510 presses compressed air into the plate-and-frame filter press 520, and presses the compressed air into mud cakes with water content meeting the requirements; the support frame 530 serves as a base of the plate-and-frame filter press 520, and the lower part of the support frame is emptied to serve as a space for discharging and transferring mud cakes.

According to a preferred embodiment of the invention, the river and lake dredging and solidifying system is composed of a small trailer 610, a weighing sensor 620, a control unit and an alarm device, wherein the small trailer 610 is placed below an outlet of the plate-and-frame filter press and used for collecting mud cakes; the weighing sensor 620 is pre-embedded under the ground below the small trailer 610 and is used for measuring the weight of the small trailer after being filled with mud cakes; the control unit is connected to the weighing sensor 620 and the alarm device, and controls the alarm device to emit an alarm sound if the weight detected by the weighing sensor 620 reaches a preset value. The mud cake falls into little trailer 610 and collects, waits that weighing sensor 620 monitors the mud cake and collects and predetermines weight after, the control unit control alarm equipment sends mud cake transfer signal or sound etc. reminds the manual work to utilize little trailer 610 to transport the mud cake to mud cake piling bin 9 storage air-dry, follow-up reprocessing utilization.

According to a preferred embodiment of the present invention, the curing agent and the dehydrating agent are added into the conditioning tank 3 of the river and lake dredging curing system.

According to a preferred embodiment of the present invention, the first stage filtration system 710, the second stage filtration system 720, the third stage filtration system 730, and the fourth stage filtration system 740 each comprise a placing tank, wherein a filter plate 8 is obliquely placed in the placing tank, and the filter plate 8 covers the water outlet of the placing tank.

According to a preferred embodiment of the present invention, in the river and lake dredging and solidifying system, the upper end of the filter plate 8 extends out of the placing tank, and the filter plate 8 is detachably disposed, so that when the filter hole of the filter plate 8 is blocked by garbage, the filter plate 8 can be detached and taken out for cleaning or replacement.

According to a preferred embodiment of the present invention, the river and lake dredging solidification system, as shown in fig. 3, the filter plate 8 comprises two layers of filter screens 810 spaced in parallel (the mesh aperture of the filter screen 810 in front is larger than that of the other filter screen in the slurry flowing direction), and the sides of the two layers of filter screens 810 are further connected by a first spring 820; the meshes of the two layers of filter screens 810 are arranged in a staggered manner, the sides, close to each other, of the two layers of filter screens 810 are respectively provided with dredging needles 830, the dredging needles on each layer of filter screen 810 respectively correspond to the filter holes on the other filter screen 810 one by one, and when the two layers of filter screens are close to each other, the dredging needles 830 on one filter screen 810 dredge the meshes of the other filter screen 810; the dredging needle 830 comprises a main rod 831 with one end fixed to the filter screen 810 and a plurality of blocking pieces 832 hinged to the other end of the main rod 831, a gap is formed between every two adjacent blocking pieces 832, and the blocking pieces 832 are connected with the main rod 831 through a second spring 833; the dredging needle 830 on the filter screen 810 with large mesh aperture is also large in size, specifically, the main rod 831 and the baffle 832 are large in size. A telescopic sleeve is sleeved outside the first spring 820, and two ends of the telescopic sleeve are respectively connected to the two layers of filter screens; when the first spring 820 is in a natural extension state, the dredging needle 830 on one filter screen 810 does not contact with the other filter screen 810; when the first spring 820 is compressed to a predetermined degree, the dredging needle 830 of one filter 810 extends into the corresponding mesh of the other filter 810 to dredge the mesh.

In the above embodiment, after the meshes of the filter screens 810 are blocked, as the weight of the impurities on the filter screens 810 increases, the first spring 820 will be compressed, the distance between two filter screens 810 will become smaller, and the dredging needle 830 on one filter screen 810 approaches the corresponding mesh on the other filter screen 810; in the process, the blocking piece 832 on the dredging needle 830 is pressed, so that the second spring 833 is compressed, and as the weight of the impurities is further increased, the second spring is further compressed, so that the dredging needle 830 enters the corresponding mesh to dredge the mesh; and after the filter screen completely enters the meshes, the second spring 833 of the dredging needle 830 recovers deformation, the dredged meshes can be further protected by the expanded blocking sheets 832 to prevent the blockage, and the gap between every two adjacent blocking sheets is utilized for filtering, so that the service life of the filter screen can be prolonged.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (9)

1. A river and lake dredging and curing system is characterized by comprising a cutter suction boat, a sedimentation tank, a conditioning tank, an aeration stirring tank and a slurry dewatering and curing system;

the cutter suction boat is communicated with the sedimentation tank, and sludge at the bottom of a river or lake is twisted into slurry by the cutter suction boat and conveyed to the sedimentation tank; the sedimentation tank is used for naturally sedimentating mud;

the conditioning tank is communicated with the sedimentation tank, and the aeration stirring tank is communicated with the conditioning tank;

the slurry dehydration and solidification system is connected with the aeration stirring tank to carry out dehydration and solidification treatment on the slurry conveyed by the aeration stirring tank.

2. A river and lake dredging and solidifying system according to claim 1, further comprising a mud cake transfer system and a mud cake stacking yard, wherein the mud cake transfer system transfers the mud cake conveyed by the mud dewatering and solidifying system to the mud cake stacking yard.

3. A river and lake dredging and solidifying system according to claim 1, further comprising a slurry filtering system, which comprises a primary filtering system between a cutter suction ship and the sedimentation tank, a secondary filtering system between the sedimentation tank and the conditioning tank, a tertiary filtering system between the conditioning tank and the aeration stirring tank, and a quaternary filtering system between the aeration stirring tank and the slurry dewatering and solidifying system.

4. A river and lake dredging and curing system as claimed in claim 1, wherein the slurry dewatering and curing system is composed of an air compressor, a plate-and-frame filter press and a support frame; the air compressor presses compressed air into the plate-and-frame filter press and presses the compressed air into mud cakes with the water content meeting the requirements; the support frame is used for supporting the plate and frame filter press, just the support frame below is equipped with accommodation space, as the space of mud cake play department and transportation mud cake.

5. A river and lake dredging and curing system as claimed in claim 4, wherein the mud cake transfer system is composed of a small trailer, a weighing sensor, a control unit and an alarm device, the small trailer is placed below an outlet of the plate-and-frame filter press and used for collecting mud cakes; the weighing sensor is pre-embedded under the ground below the small trailer and is used for measuring the weight of the small trailer after the small trailer is filled with mud cakes; the control unit is connected to the weighing sensor and the alarm device, and controls the alarm device to give an alarm sound if the weight detected by the weighing sensor reaches a preset value.

6. A river and lake dredging and solidifying system according to claim 1, wherein a solidifying agent and a dehydrating agent are thrown into the conditioning tank.

7. A river and lake dredging and solidifying system as claimed in claim 3, wherein the primary filtering system, the secondary filtering system, the tertiary filtering system and the quaternary filtering system each comprise a placing tank, a filter plate is obliquely placed in the placing tank, and the filter plate covers a water outlet of the placing tank.

8. A river and lake desilting solidification system according to claim 7, characterized in that, the upper end of filter plate stretches out of the placing pond, and the filter plate can be arranged detachably.

9. A river and lake dredging and curing system as claimed in claim 8, wherein the filter plate comprises two layers of filter screens spaced in parallel with each other, and the side edges of the two layers of filter screens are further connected by a first spring; the meshes of the two layers of filter screens are staggered, dredging needles are respectively arranged on the surfaces, close to each other, of the two layers of filter screens, the dredging needles on each layer of filter screen respectively correspond to the filter holes on the other filter screen one by one, and when the two layers of filter screens are close to each other, the dredging needles on one filter screen dredge the meshes of the other filter screen; the dredging needle comprises a main rod and a plurality of blocking pieces, one end of the main rod is fixed on the filter screen, the blocking pieces are hinged to the other end of the main rod, a gap is reserved between every two adjacent blocking pieces, and each blocking piece is connected with the main rod through a second spring;

a telescopic sleeve is sleeved outside the first spring, and two ends of the telescopic sleeve are respectively connected to the two layers of filter screens;

when the first spring is in a natural extension state, the dredging needle on one filter screen is not contacted with the other filter screen; when the first spring is compressed to a preset degree, the dredging needle on one filter screen extends into the corresponding mesh on the other filter screen to dredge the mesh.

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