Working Principle of Jet Suction Dredger

The operation of the jet suction dredger depends on the coordinated work of two core systems: high-pressure jet system and main suction pump system. The whole process runs automatically and continuously without manual intervention during normal operation.
Step 1: Sediment Fluidization by High-Pressure Water Jet Equipped with a dedicated high-pressure water pump and wear-resistant alloy nozzles, the system sprays high-speed water flow towards riverbed or seabed sediment. The strong water impact breaks up compacted silt, fine sand and loose deposits, turning solid materials into suspended sand-water slurry. Even sediment mixed with aquatic weeds, branches and floating debris can be fully mixed without winding or blockage.
Step 2: Continuous Slurry Suction The main wear-resistant sand pump generates powerful negative pressure at the suction inlet, drawing the well-mixed slurry into the pump chamber stably. Optimized flow channel design ensures smooth suction, and the solid content of slurry can reach 30% to 45% under standard working conditions.
Step 3: Long-Distance Pipeline Transportation After being pressurized by the main pump, the slurry is delivered to designated areas via floating pipelines and underwater pipelines. The standard conveying distance ranges from 800 meters to 2500 meters. By adding booster pump units, the maximum delivery distance can be extended to over 4500 meters, meeting the demands of sand stacking, land reclamation and sediment discharge in remote areas.
Without mechanical cutting parts, the dredger greatly reduces potential failure points and realizes long-term stable 24-hour operation.

Core Competitive Advantages

1. Zero Clogging, Ultra-Low Failure Rate

There is no cutter head, gear assembly or exposed rotating parts at the suction end. It can work normally in water areas containing weeds, plastic waste, twigs and small sundries. Problems like cutter tooth breakage, rope winding and material jamming are completely avoided. The equipment uptime rate is far higher than traditional cutter dredgers, saving a large amount of time lost due to shutdown and maintenance.

2. Outstanding Shallow Water Adaptability

The ultra-shallow draft design is the biggest highlight of the jet suction dredger. The minimum working water depth can be as low as 0.5 meters, allowing it to navigate and construct freely in dry-season rivers, reservoir edge zones, tidal flats and rural irrigation ditches. These shallow areas are inaccessible for large cutter suction dredgers, making jet dredgers irreplaceable for shallow water projects.

3. Low Operating Cost & Energy Saving

The hydraulic jet mode has no mechanical friction loss caused by cutting hard soil. Compared with cutter suction dredgers of the same output, fuel consumption is reduced by 20% to 30%. Meanwhile, the number of vulnerable parts is small, and the replacement cycle of wearing components is long, which effectively cuts daily maintenance and operating expenses for long-term projects.

4. Flexible Transportation & Fast Deployment

Most models adopt modular split structure. The hull can be disassembled into multiple parts, which can be transported by ordinary trucks or standard containers without large lifting and shipping equipment. On-site assembly can be completed within 1 to 2 days, which is very suitable for remote mountain water areas and scattered small projects.

5. Eco-Friendly Construction

The directional water jet only stirs sediment near the suction port, and will not cause large-scale disturbance to the water body, keeping water turbidity at a low level. Combined with fully enclosed pipeline transportation, it prevents secondary sediment pollution. The equipment complies with international environmental protection standards and is applicable to urban landscape water bodies and ecological restoration projects.

6. Simple Operation & Labor Saving

The control system is centralized and intuitive. A single operator can complete all operations including jetting, suction, hull movement and position adjustment. The operation learning threshold is low, and enterprises do not need to train a large number of professional technicians, further controlling labor costs.

Core Materials & Standard Configuration

We strictly select high-quality raw materials and industrial-grade components to ensure the durability and stability of the dredger under long-term abrasive working conditions. All key parts support material upgrading and customization according to working environment.

1. Main Sand Pump

The impeller, volute and wear liner are made of 28%~32% high-chrome alloy, featuring high hardness and strong abrasion resistance. It can withstand long-term impact and friction of sand and gravel slurry. For seawater and corrosive water environments, 316L stainless steel configuration is optional to enhance anti-corrosion performance.

2. Jet Pump & Nozzles

High-lift professional jet pump is equipped to provide stable water pressure. The nozzles are made of tungsten carbide alloy, with anti-impact and anti-blocking design, maintaining stable jet effect for a long time.

3. Hull Structure

The main hull is welded with thickened Q235B steel plates, processed with overall stress relief and multi-layer marine anti-rust paint. It is anti-collision, anti-deformation and anti-rust. For long-term marine operation, customized galvanized and heavy-duty anti-corrosion coatings are available.

4. Power System

Standard configuration is industrial diesel power unit, with stable power output and strong overload resistance. According to on-site power supply conditions, pure electric drive or diesel-electric hybrid power system can be customized.

Standard Technical Parameters

Item
General Standard Jet Suction Dredger
Hull Dimension
10m × 3.2m × 1.3m
Total Weight
22 tons
Minimum Draft
0.6m
Minimum Working Water Depth
0.5m
Standard Dredging Depth
8m (custom up to 15m)
Main Pump Power
160kW
Jet Pump Power
60kW
Total Installed Power
220kW
Hourly Slurry Output
320~480m³/h
Effective Sand Output
90~150m³/h
Slurry Solid Content
30%~45%
Standard Delivery Distance
800m (max 4500m with booster pumps)
Jet Working Pressure
0.7~1.1MPa
Main Material
Q235B Steel + High-Chrome Alloy

Different Specification Comparison Table

We provide multiple sizes of jet suction dredgers to meet projects of different scales. You can select the suitable model according to your output demand, water depth and transportation conditions.
Specification
Small 6-inch Model
Medium 10-inch Model
Large 12-inch Model
Hourly Slurry Output
150~250m³/h
400~600m³/h
700~900m³/h
Effective Sand Output
40~80m³/h
120~180m³/h
200~280m³/h
Min Working Water Depth
0.5m
0.8m
1.2m
Max Dredging Depth
8m
15m
20m
Total Power
120~150kW
255~300kW
400~500kW
Transportation Difficulty
Easy (truck transport)
Normal (container loading)
Difficult (barge transport)
Investment Cost
Low
Medium (Best Cost Performance)
High
Recommended Application
Pond cleaning, small village river dredging
River sand mining, reservoir desilting, channel maintenance
Large river dredging, coastal auxiliary reclamation

Main Application Scenarios

1. River Sand Mining

It is the preferred equipment for inland river sand extraction. The high-pressure jet fully fluidizes sand layers to obtain high-purity construction sand. With stable output and low operating cost, it is widely used in sand mining projects across Southeast Asia, Africa and other regions.

2. Reservoir & Aquaculture Pond Desilting

Long-term silt accumulation reduces water storage capacity and aquaculture efficiency. The jet suction dredger thoroughly cleans bottom silt without damaging the dam and pond foundation. It effectively restores water volume and improves water quality.

3. Shallow River & Irrigation Channel Dredging

Used for widening, deepening and desilting rural rivers, urban auxiliary channels and farmland irrigation ditches. It solves the problem of silt blockage, ensures smooth water flow and improves flood control and drainage capacity in flood seasons.

4. Tidal Flat & Coastal Silt Cleaning

Benefiting from ultra-shallow draft, the dredger can work normally on intertidal zones that large vessels cannot reach. It is suitable for beach renovation, coastal silt removal and small-scale land reclamation auxiliary works.

5. Municipal Ecological Water Restoration

Applied to landscape lakes, urban wetlands and scenic water areas. Low-turbidity construction protects aquatic ecology and fully meets strict environmental protection requirements for urban water environment renovation.

6. Tailings Pond Treatment

It can suck and clean fine mineral tailings deposited at the bottom of tailings ponds, realize resource recovery and restore the effective capacity of ponds, matching with small and medium mining production lines.

Full Customization Service

Every project has unique working conditions, so we refuse one-size-fits-all standard products. We provide one-stop customized solutions covering all aspects of the dredger:
  • Dredging Depth: Customize 6m, 8m, 10m, 12m, 15m working depth according to actual water depth
  • Performance Upgrade: Increase pump power to raise output and extend long-distance delivery capability
  • Material Matching: High-chrome wear-resistant upgrade, 316L stainless steel anti-corrosion upgrade for seawater
  • Hull Design: Integrated hull, split modular hull for convenient transportation
  • Power Mode: Diesel, electric, hybrid power and variable frequency energy-saving system
  • Intelligent Function: Optional GPS positioning, remote monitoring, automatic cruising dredging system

Why Choose Our Jet Suction Dredgers

  • Professional Manufacturer: More than 10 years of experience in dredging equipment R&D and production, with abundant overseas project cases
  • Reliable Quality: ISO9001 and CE certified, all products adopt brand-new high-standard materials and strict quality inspection
  • Full Customization: Professional engineers design solutions based on your geology, water depth and output demands
  • Complete After-Sales: Provide overseas installation guidance, operator training and long-term spare parts supply
  • Factory Direct Sales: No middlemen markup, offering competitive price and high cost-performance products

Get Your Free Solution & Quotation

If you are looking for a stable, low-cost and easy-to-operate dredging device for shallow water sand mining and silt removal, our customized jet suction dredger is your ideal choice.
Please contact us and tell us your project details: working water depth, sediment type, required hourly output and pipeline delivery distance. Our engineering team will provide you withfree design drawings, technical solutions and detailed quotation within 24 hours. We are ready to support your dredging projects