CN212451121U

CN212451121U - Comprehensive treatment system for dredging and drying river channel

Info

Publication number: CN212451121U
Application number: CN202020748920.2U
Authority: CN
Inventors: 林超
Original assignee: Wuxi Lanwan Resource Regeneration Technology Co ltd
Current assignee: Wuxi Lanwan Resource Regeneration Technology Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-02-02
Anticipated expiration: 2030-05-08

Abstract

The utility model discloses a comprehensive treatment system for river channel dredging and drying, which is characterized in that river channel sludge is wrapped and lifted by a cutter suction type dredging boat, the sludge is connected with a primary buffer tank through a movable compression-resistant conveying hose, a supernatant outlet above the primary buffer tank is connected with a sewage inlet of a shallow ion air flotation machine, clear water of the shallow ion air flotation machine is discharged into a river channel, and a scum outlet of the shallow ion air flotation machine is connected with an inlet of a secondary buffer tank; a sludge outlet of the primary buffer tank is connected with an inlet of the secondary buffer tank, a supernatant outlet of the secondary buffer tank is connected with a sewage inlet of the shallow ion air flotation machine, a sludge outlet of the secondary buffer tank is connected with a sludge conditioning tank, a sludge outlet of the sludge conditioning tank is connected with a screw squeezing separator, and a separation liquid outlet of the screw squeezing separator is connected with an inlet of the primary buffer tank; the flocculating agent is added into the primary buffer tank and the sludge conditioning tank, and the system can efficiently treat and dispose the sludge, so that the labor is saved.

Description

Comprehensive treatment system for dredging and drying river channel

Technical Field

The utility model mainly relates to a river course basin administers technical field, especially relates to a comprehensive treatment system of river course desilting and mummification.

Background

With the rapid development of urban construction, the urban river serves as an important component of an urban water system, and the river is silted and drained unsmooth, so that the life and property safety of people can be threatened directly. The urban river silt has high water content and complex components, and most of the urban river silt contains pollutants such as heavy metals, and if the urban river silt is not well treated, the urban river silt not only can cause serious secondary pollution, but also can occupy a large amount of land resources.

At present, a conventional dredging method is adopted, a river channel is intercepted, a construction cofferdam is built, open water in a dredging river section is discharged, a manual excavator is adopted on site to load silt into a tank car, and the tank car is transported to a disposal and stacking point outside the tank car. The method has a plurality of defects, and the sludge in the river channel is exposed, so that the bottom sludge can generate odor, pollute the surrounding environment and influence the life of residents.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a comprehensive treatment system for dredging and drying a river channel in order to overcome the defects in the prior art.

The purpose of the utility model can be realized through the following technical scheme:

a comprehensive treatment system for dredging and drying a river channel comprises a primary buffer tank, a shallow ion air flotation machine, a secondary buffer tank, a sludge conditioning tank and a screw squeezing separator, wherein river channel sludge is lifted by a cutter suction type dredging ship through cutter suction and is connected with the primary buffer tank through a movable pressure-resistant conveying hose, a supernatant outlet above the primary buffer tank is connected with a sewage inlet of the shallow ion air flotation machine, clear water of the shallow ion air flotation machine is discharged into the river channel, and a scum outlet of the shallow ion air flotation machine is connected with an inlet of the secondary buffer tank;

a sludge outlet of the primary buffer tank is connected with an inlet of a secondary buffer tank, a supernatant outlet of the secondary buffer tank is connected with a sewage inlet of a shallow ion air flotation machine, a sludge outlet of the secondary buffer tank is connected with a sludge conditioning tank, a sludge outlet of the sludge conditioning tank is connected with a screw squeezing separator, and a separated liquid outlet of the screw squeezing separator is connected with an inlet of the primary buffer tank;

and flocculating agents are added into the primary buffer tank and the sludge conditioning tank.

Preferably, the primary buffer tank adds a flocculating agent into the tank through a medicine dissolving and adding unit.

Preferably, dissolve medicine and add the medicine unit and include medicament bucket, mixer, motor, measuring pump, the motor is connected to the mixer, and the mixer setting is in the medicament bucket, the medicament bucket passes through the measuring pump and connects one-level buffer pool.

Preparing a combined medicament (PAC/PAM) in a medicament barrel according to a certain proportion, uniformly stirring, and then respectively pumping into a buffer tank and a sludge conditioning tank by a metering pump.

Preferably, a stirring device is arranged inside the sludge conditioning tank, and the sludge conditioning tank is connected with a medicine dissolving and adding unit.

The utility model has the advantages that:

the system can efficiently treat the sludge, improve the normal living environment of residents around the river channel, bring obvious environmental benefits and social benefit environment for the society, and can treat the sludge simply and quickly and save manpower.

Drawings

Fig. 1 is a flow chart of a system architecture of the present patent application.

Detailed Description

The technical scheme of the utility model is further described with the attached drawings:

A small cutter suction dredger utilizes a reamer arranged at the front section of a reamer rest to grind underwater mud stones to form a mud-water mixture, then sucks underwater mud from a mud head at the front section of the reamer rest through a centrifugal mud pump, and discharges the underwater mud to a mud discharging place through an in-ship suction pipe, a mud pump and a mud discharging pipe, thereby completing dredging operation. The movable pressure-resistant transportation hose conveys the muddy water mixture to an appointed place on the shore for subsequent corresponding treatment and disposal.

And collecting sludge, adding a flocculating agent into the first-stage buffer tank through a dissolved medicine dosing unit, mixing, uniformly precipitating, pumping the bottom precipitated sludge to a sludge conditioning tank, and automatically flowing the supernatant to a shallow ion air flotation machine.

The medicine dissolving and adding unit comprises a medicine barrel, a stirrer, a motor, a metering pump and the like, a combined medicine (PAC/PAM) is prepared in the medicine barrel according to a certain proportion and is uniformly stirred, and then the medicine dissolving and adding unit is respectively pumped into a buffer tank and a sludge conditioning tank through the metering pump.

And the supernatant passing through the primary buffer tank and the secondary buffer tank realizes the integrated operation of flocculation, air flotation, skimming and mud scraping in a shallow ion air flotation machine. And the treated clear effluent is used for supplementing water to the river, and the skimmed scum enters a secondary buffer tank.

The sludge conditioning tank is provided with a stirring device, and under the stirring effect, the combined medicament (such as PAC/PAM) and the river sludge are quickly and uniformly mixed. Colloid in the river course silt loses stability under the effect of coagulating agent, and mutual coalescence forms the alum album, has increaseed the collision probability between the flocculating constituent simultaneously under the effect of stirring, forms big flocculating constituent gradually, is favorable to deposiing silt and gets into the screw rod squeezer, and subsequent silt of being convenient for is squeezed. In order to further concentrate the settled sludge, it is arranged to enter a screw press separator.

The screw squeezing separator comprises a pretreatment unit and a squeezing unit. The sludge separated from the sludge conditioning tank is pumped into a screw press with preconcentration for concentration and is dehydrated under the action of pressure difference, and finally, the pressure borne by sludge mixed liquor is continuously increased due to the fact that the screw pitch between screw rotary sheets of a squeezing unit is gradually reduced, dehydration is started under the action of the pressure difference, and water flows out from a filtering gap between a fixed ring and a movable ring. The water content of the sludge after the pressing treatment can reach about 85 percent, and the amount of the sludge after drying is greatly reduced.

River silt promotes river silt through small-size cutter-suction type dredging ship cutter-suction, through pump sending to one-level buffer pool, dissolves in the medicine goes out the medicine mouth of adding the medicine unit and is connected to one-level buffer pool in, carries out misce bene, even, deposits, then the bottom deposits silt and gets into second grade buffer pool, and the supernatant flows to shallow layer ion air supporting unit automatically, and the clear water that clarifies out is used for the river course moisturizing. And (4) allowing the scum skimmed by the shallow ion air flotation machine to enter a secondary buffer tank, and mixing, homogenizing and precipitating again. The supernatant fluid automatically flows to a shallow layer ion air flotation machine for circular treatment, the bottom precipitated sludge is pumped to a sludge conditioning pool, a flocculating agent is added into the sludge conditioning pool for mixing, uniform and precipitation, and the sludge concentrated and precipitated at the bottom is conveyed to a screw type squeezing separator by a pump for further squeezing and dewatering. The water content of the sludge after the pressing treatment can reach about 85 percent. The dried sludge amount is greatly reduced, so that the number of transport vehicles for outward transportation and disposal is reduced. In addition, the generated squeezed separation liquid is discharged to the primary buffer tank for mixing, homogenizing and precipitating, and bottom precipitated sludge enters the secondary buffer tank for circular treatment, so that the recovery rate of the sludge is greatly improved. And the supernatant is subjected to circulating treatment, and the clarified clear water is used for replenishing water in the riverway, so that the water replenishing rate of the riverway is improved.

Finally, it should be noted that:

the skilled person can, with reference to the present disclosure, carry out the method and carry out its application, it being expressly noted that all similar substitutes and modifications apparent to the skilled person are deemed to be included within the present invention. The method and application of the present invention have been described in terms of preferred embodiments, and it will be apparent to those skilled in the art that the techniques of the present invention may be practiced and used without departing from the spirit and scope of the present invention by modifying or otherwise appropriately changing or combining the various methods and applications of the present invention.

The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and the appended claims are intended to cover such modifications and equivalents as fall within the spirit and scope of the invention.

Claims

1. The utility model provides a comprehensive treatment system of river course desilting and mummification which characterized in that: the system comprises a primary buffer tank, a shallow ion air flotation machine, a secondary buffer tank, a sludge conditioning tank and a screw squeezing separator, wherein river sludge is lifted by a cutter suction type desilting boat through cutter suction, and is connected with the primary buffer tank through a movable pressure-resistant conveying hose;

2. An integrated processing system as defined in claim 1, wherein: and the primary buffer tank adds a flocculating agent into the tank through a medicine dissolving and adding unit.

3. An integrated processing system as defined in claim 2, wherein: the medicine dissolving and adding unit comprises a medicine barrel, a stirrer, a motor and a metering pump, wherein the stirrer is connected with the motor, the stirrer is arranged in the medicine barrel, and the medicine barrel is connected with a primary buffer tank through the metering pump.

4. An integrated processing system as defined in claim 1, wherein: the sludge conditioning tank is internally provided with a stirring device and is connected with a medicine dissolving and adding unit.