CN102121256B - Suction sludge dewatering sand dredger - Google Patents

Abstract

The invention relates to a suction sludge dewatering sand dredger which is characterized in that a sludge processing device is arranged on a boat body and comprises an extracting unit, a sieving unit, a heavy metal processing unit, a dewatering unit, a deodorizing unit, a dewatered sludge collecting unit and a wastewater processing and discharging unit. In the invention, the integral design of sediment dewatering processing device for urban landscape water pollution is realized; the sludge is immediately dried and dewatered while dredging; and the processed sludge can be directly used in the agricultural field, therefore, the pollution on the environment is avoided.

Description

A cutter suction sludge dewatering dredger

technical field

The invention belongs to a dredging ship, in particular to a cutter suction type sludge dewatering dredging ship.

Background technique

With the development of society and economy, the water quality deterioration of landscape water bodies in cities and suburbs in my country is becoming more and more serious. In order to improve the water pollution status and control the internal source pollution of landscape water, sediment dredging, as a thorough treatment method in the treatment and restoration of polluted landscape water, is increasingly being used in landscape water treatment projects. According to incomplete statistics, from 1998 to 2005 alone, 40 lakes were dredged for environmental protection, involving more than 20 cities, and about 37.583 million m ³ of lake sediment was dredged. The sediment is mainly composed of organic matter and contains a large amount of harmful substances such as pathogenic bacteria, viruses, and parasite eggs. If it cannot be effectively disposed of, it will inevitably cause secondary pollution, which makes the disposal and recycling of the sediment inevitable; It is rich in organic elements such as nitrogen and phosphorus, and also has a certain amount of metal elements, which creates objective conditions for the resource utilization of sediment. As one of the core contents of environmental protection dredging, the harmless and resourceful dredging of polluted sediment has become a new difficulty and new challenge in the comprehensive environmental management work.

The water content of the dredged sediment of urban landscape water is as high as 95%, and the volume of the sludge after mechanical rapid dehydration treatment is significantly reduced, and the volume can be compressed to 1/4 to 1/5 of the original, and the performance is stable, odorless, and free of pathogenic organisms , greatly reducing the secondary pollution to the environment. Compared with urban solid waste such as sewage sludge and industrial waste residue, the pollutants in the dredged sediment of landscape water bodies are simple and low in content, and their physical and chemical properties are similar to those of soil. Among them, organic matter, nitrogen, phosphorus and other nutrients are rich in nutrients, which can increase land fertility, Improve soil cultivation performance and save a lot of disposal costs. Therefore, farmland allocation is a way of resource recovery and utilization in line with the principle of sustainable development.

In terms of sludge dehydration, Japan has developed a mobile continuous dehydration ship. The sludge dehydration device is placed on the ship to make the equipment mobile. The sludge dumped in the water can be continuously collected into the coagulation sedimentation tank, and a harmless coagulant is added. Vacuum dehydration meets the requirements. In terms of heavy metal removal, a series of chemical methods that are easy to grasp and easy to operate have been developed at home and abroad, that is, adding chemical agents to transform heavy metals in sludge from insoluble compounds to soluble ionic or complex ion states to reduce The purpose of heavy metal content. But today's advanced dredging ships at home and abroad only collect and transport the silt, neither can it be processed in time to reach the dehydration index, nor can it control the heavy metal content below the agricultural standard.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a cutter-suction sludge dewatering dredger with scientific and reasonable design, clean and environment-friendly, and easy to use. transport function.

The technical scheme that the present invention realizes purpose is:

A cutter suction sludge dewatering dredging ship, characterized in that a sludge treatment device is installed in the hull, and the sludge treatment device includes an extraction unit, a screening unit, a dehydration unit, a deodorization unit, a dewatered sludge collection unit, and a waste water treatment and discharge unit , the self-priming sludge pump of the extraction unit is connected to the cutter suction head to protrude from the bottom of the ship, the self-priming sludge pump is connected to the vibrating screen of the screening unit, and the vibrating screen is connected to the sand storage tank; the vibrating screen is connected to the belt filter press of the dewatering unit through pipelines , the belt filter press is connected to the wastewater treatment and discharge unit; the belt filter press is directly connected to the vibrating fluidized bed dryer, and the sludge outlet of the vibrating fluidized bed dryer is connected to the mud storage tank of the dewatered sludge collection unit; the vibrating fluidized bed An activated carbon deodorizer is connected to the air outlet of the dryer.

Moreover, the cutter suction sludge dewatering dredger according to claim 1 is characterized in that: a heavy metal treatment unit is installed on the pipeline between the vibrating screen of the screening unit and the dewatering unit.

Moreover, a dosing unit is installed on the pipeline between the heavy metal treatment unit and the dehydration unit.

Furthermore, the wastewater treatment and discharge unit is composed of a purifier and a flow meter.

Moreover, the vibrating fluidized bed dryer of the dehydration unit is equipped with a waste water discharge pipe, and is connected with the drainage pipeline of the belt filter press.

Moreover, a water content detector is installed on the pipeline between the vibrating fluidized bed dryer and the mud storage tank of the dewatered sludge collection unit.

Moreover, a hydraulic control device for controlling the positioning of the hull is installed on the hull.

Advantage and positive effect of the present invention are:

1. The cutter suction sludge dewatering dredging ship of the present invention combines the hull and the sludge treatment device to form a new type of dredging ship that takes into account both dredging, dredging and dewatering treatment, which can be moved and has the functions of dredging and dewatering treatment. The operation is more convenient and fast, and the present invention has strong adaptability to the working environment, and makes the operation more convenient and fast, and improves the processing efficiency and saves manpower through mechanized processing.

2. The cutter-suction sludge dewatering dredger of the present invention, the moisture content and heavy metal content of the treated sludge meet the agricultural standards for sludge, and the water displacement and the moisture content of the treated dry sludge can be detected, which can be directly transported for farmland release .

3. The present invention realizes the integrated design of the dehydration treatment device for urban landscape water body polluted sediment, and immediately dehydrates and dries the sludge while dredging, and the treated sludge can be directly transported to agricultural use, avoiding pollution to the environment.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the present invention;

Fig. 2 is a schematic structural view of the sludge treatment device of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be noted that the embodiments are illustrative, not restrictive, and cannot limit the protection scope of the present invention.

A cutter suction sludge dewatering dredging ship, comprising a hull 3, a hydraulic control device 2 installed on the hull to control the positioning of the hull, and a control room 4 installed with an electrical control system.

The innovation point of the present invention is:

A sludge treatment device 5 is installed on the hull, and the sludge treatment device includes an extraction unit, a screening unit, a heavy metal treatment unit, a dosing unit, a dehydration unit, a deodorization unit, a dewatered sludge collection unit, and a waste water treatment and discharge unit. The self-priming sludge pump 6 of the extraction unit is connected to the twisted suction head 1 of the sludge treatment device installed on the bottom of the ship. The twisted suction head extends out of the bottom of the ship to connect with the landscape water body to extract muddy water with high silt content; the pumped muddy water passes through the self-priming sludge pump Enter the vibrating screen 7 of the screening unit, through the screening of the vibrating screen, the sand is intercepted and poured into the sand storage tank 9; the pipeline between the vibrating screen of the screening unit and the dehydration unit is equipped with a heavy metal processing unit, the heavy metal The treatment unit is communicated with the pipeline by the heavy metal treatment device 8 to reduce the heavy metal content in the muddy water in the pipeline; a dosing unit is installed on the pipeline between the heavy metal treatment unit and the dehydration unit, and the dosing unit is communicated with the pipeline by a dispensing box 10 , through the valve to control the dosing in the dispensing box to add the pipeline; the vibrating screen is connected to the belt filter press 11 of the dehydration unit through the pipeline, the belt filter press is connected to the vibrating fluidized bed dryer 15, and the belt filter press is connected to the waste water Treatment and discharge unit, the waste water treatment and discharge unit is composed of the purifier 13 and the installed waste water discharge pipe 14 of the vibrating fluidized bed dryer and other pipelines, and the waste water discharge pipe is connected with the drainage pipe at the other end of the belt filter ; A flowmeter 12 is installed on the pipeline connected to the purifier, and the waste water discharge pipe of the purifier is connected to the landscape water body; the mud outlet of the vibrating fluidized bed dryer is connected to the mud storage tank 17 of the dewatering mud collection unit, and the vibrating fluidized A water content detector 16 is installed on the pipeline between the bed dryer and the mud storage tank; an activated carbon deodorizer 18 is connected to the air outlet of the vibrating fluidized bed dryer.

Dredging method of the present invention is:

When dredging channel silt, first position the hull, put the suction pipe with twisted suction head into the bottom mud of the landscape water body, turn on the self-priming sludge pump, and the suctioned sludge is screened through the vibrating screen, and Unload the intercepted sand into the sand storage tank. The sand storage tank is equipped with an automatic sensing device. When it is almost full, an alarm will be issued to facilitate timely cleaning. The screened sludge enters the heavy metal treatment device to reduce the heavy metal content, and then mixes with the appropriate amount of flocculant put in the dispensing box in the pipeline, and then enters the belt filter press for pressure filtration, and the filtered wastewater is purified by the wastewater discharge pipe. After the treatment reaches the landscape water quality standard, it is discharged back to the landscape water body, and the discharge volume is recorded by the flow meter. After pressing, the mud flakes enter the vibrating fluidized bed dryer for further dehydration. Under the action of vibration force, the mud flakes are thrown along the horizontal direction and move forward continuously. The hot air passes through the fluidized bed to exchange heat with the mud flakes. The air flows through the activated carbon to remove The odorizer discharges to the outside. After the dried sludge is detected by the water content detector, it is poured into the mud storage tank for sealed storage, and can be directly transported to agricultural use.

The components not described in detail in this embodiment belong to the prior art.

Claims (7)

1. one kind is twisted suction formula sludge dewatering dredger; It is characterized in that: the sludge treatment device is installed in hull; This sludge treatment device comprises extracting unit, sieve unit, dewatering unit, deodorizing unit, dewatered sludge collector unit, wastewater treatment exhaust unit; The self-priming sludge pump of extracting unit is communicated with twisting sucker head and stretches out hull bottom, and the self-priming sludge pump is communicated with the vibrosieve of sieve unit, and this vibrosieve is communicated with sand storage tank; Vibrosieve is through the belt filter press of pipeline connection dewatering unit, and belt filter press is communicated with the wastewater treatment exhaust unit; Belt filter press directly connects Vibratingfluidbeddrier, and the mud outlet of this Vibratingfluidbeddrier connects the storage mud jar of dewatered sludge collector unit; Be connected with the active carbon deodoriser on the air outlet slit of Vibratingfluidbeddrier.

2. strand according to claim 1 is inhaled formula sludge dewatering dredger, it is characterized in that: on the vibrosieve of said sieve unit and the pipeline between the dewatering unit heavy metal processing unit is housed.

3. strand according to claim 2 is inhaled formula sludge dewatering dredger, it is characterized in that: on the pipeline between said heavy metal processing unit and the dewatering unit dosing unit is housed.

4. strand according to claim 1 is inhaled formula sludge dewatering dredger, and it is characterized in that: said wastewater treatment exhaust unit is made up of clarifier and flow meter.

5. strand according to claim 1 is inhaled formula sludge dewatering dredger, and it is characterized in that: the Vibratingfluidbeddrier of said dewatering unit is equipped with wastewater discharge pipe, and links to each other with the discharge pipe line of belt filter press.

6. strand according to claim 1 is inhaled formula sludge dewatering dredger, it is characterized in that: on the pipeline between the Vibratingfluidbeddrier of said dewatered sludge collector unit and the storage mud jar moisture content detector is installed.

7. strand according to claim 1 is inhaled formula sludge dewatering dredger, it is characterized in that: the hydraulic control device that control hull location is housed on the said hull.

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