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The Construction of WNX Series Slurry Treatment System Functional:

WNX series of slurry separation equipment consists of coarse screen unit, the first cycle unit and the second cycle unit. The overall modular design, according to the specific requirements of the project split system combination, has a strong engineering applicability.WNX series of slurry treatment system is mainly composed of mud and water separation system and modulation slurry system composed. The main function is to process the tunnel excavation process contains gravel and soil slurry separation work, separated from the sand and mud contains a small amount of water can be shipped out directly.The mud part can be directly adjusted as a tunneling construction equipment, raw materials, to ensure the normal operation of tunneling construction equipment.

Single-line normal tunneling, WNX series of mud water treatment system function unit is as follows:

1. Slurry separation system equipment:

1) WNX series of mud and water separation equipment features:

Mud and water balance shield machine started digging, the sludge discharged by mud pump by WNX slurry separation equipment, and then discharged into the sedimentation tank for precipitation, After the first cycle unit and the second cycle unit dewatering screen out of the residue particles，can be transported by vehicles carrying environmental monitoring to the designated spoil. If the mud density is too large to add water for dilution, if the slurry density is too low, the use of high-speed pulp machine to adjust, increase the mud density pumped to the shield machine.

2) WNX series of slurry separation equipment CAXA design:

WNX series of slurry separation equipment using CAXA three-dimensional entity design software, and through the Nastran FX software strength calculation and finite element analysis to ensure that the equipment structure is reasonable, to avoid stress concentration caused damage to the equipment. Winner have their own set of quality inspection system, whether it is purchased equipment or their own processing equipment, we have carried out process testing and final inspection. We are in the process of design stage, for the vulnerability point has been fully considered unexpected events, there are solutions to deal with the solution to customer problems.

Nastran FX Intensity calculation and finite element analysis

3) WNX series of slurry separation equipment reliability guarantee:

The slime system adopts the modular design, the whole structure is simple and reasonable, the area is small, the slag is concentrated, the equipment is simple, the quality is stable and reliable and the failure rate is low. The system design capacity is large, WNX-1000 slurry separation equipment reliability mainly in several aspects: First, the two systems can be realized between the series and parallel exchange; WNX-1000 slurry separation equipment reliability mainly in several aspects:

A: The overall design of the reliability, that is, the timely treatment of slurry, slurry quality of adaptability;

B: Processing capacity of the wealthy configuration, including equipment and spare parts spare parts;

C: The reliability of the equipment itself, such as performance, quality, service life;

D: Through the pipeline system and the valve group to switch each group of equipment, each other back.

Characteristics of WNX Series Slurry Treatment System

1) Secondary circulation units 50 cyclones are symmetrically distributed, providing the same amount of water and pressure to each cyclone to ensure the most efficient separation possible. Each cyclone is lined with HRT abrasion resistant rubber in the conical end. Each cyclone is equipped with a separate shut-off valve for easy replacement during operation.

2) The use of high-quality polyurethane sieve, with good wear resistance, long life, good corrosion resistance. As the sieve design is reasonable, sieve plate manufacturing process is unique, the limit size particles will not plug the sieve, so the screening efficiency.

3 )We can use skid-mounted mud tank or mobile mud tank. Skid-mounted mud tank production, assembly are completed in the factory, on-site installation of less work, just complete the interface pipe and external electrical connections can work, easy to install.

4) Easy to migrate: Because the functional components are integrated into a single base, you can easily migrate as a whole.

5) Compact design, small footprint: skid mounted drilling mud solid control system equipment is compact, than the traditional installation to reduce the area.

6) Design and manufacture mud cans according to API & ISO standards, using corrugated boards to make sidewalls stronger. First of all do the sandblasting treatment, painting the mighty use of the brand of gold epoxy zinc-rich paint, the first layer thickness of 75μ, epoxy medium twice, the thickness of 250μ, finish twice, the tank thickness of 70 μ. Follow the above in the tank to spray 2 layers.

7) Our company independent research and development and production of vibration motor, easy maintenance, the body strength, low noise, exciting force and output with appropriate, exciting force, just adjust the eccentric block angle, you can adjust the excitement. Fully enclosed structure, can work without any explosion requirements of dust.

8) PCL remote monitoring console, with small size, light weight, low energy consumption, high reliability.

9) Industrial pressure gauge, the detection of cyclone and mortar pump key point of water pressure, so that on-site operators can quickly determine the equipment running.

10) In addition to remote control, the site of each device has a separate distribution box for on-site commissioning monitoring and emergency stop a device.

⑤WNX series of mud separation equipment monitoring center process diagram:

2. Pulp Equipment:

① pulp system function description

When the shield machine work into the tunnel, to ensure that the mud carrying the ability of the soil and the stability of the surface, the mud needs to achieve certain physical properties. The pulping system is responsible for preparing the new slurry for preparation. In the normal driving stage of the shield machine, due to the large difference in the formation, Shield machine drives in different strata, the return to the mud indicators will be different , and the pulping capacity of the pulping system can meet the requirements of the shield machine in different stratum of the pulp needs. The pulping system mainly consists of two parts: bentonite pulping and chemical mud preparation.

1) Expansive soil pulping

Bentonite pulping using blender pulping way, the bentonite to be fast and fully hydrated, so that the slurry to achieve the best performance indicators. The Venturi pulp has excellent performance, which provides a high degree of shear for the rapid hydration of the polymer or clay, reducing the amount of polymer by more than 15%, the amount of bentonite reduced by more than 30%, and improving the quality of the cake and the bottom of the hole loss, reducing the slurry shear ratio, improve the gel strength.

2) Before the start of the pulp to confirm the shear pump suction valve, sand valve, pump outlet valve, mixed funnel feed valve open, feeding valve, release valve closed, open the water supply pipe water valve, start the water pump, Add water. Add about 0.5 minutes after the water to open the shear valve and stirrer, while the artificial mixing of the funnel to put the amount of bentonite (bentonite by the amount of pulp required by the proportion of the decision, calculated in advance). Continue to add water, when the water added to the pulping system set the liquid level, close the water supply pipe water valve, water valve, stop adding water. Through the mixing funnel, shear pump and stirrer composed of shear and hydration system, to achieve rapid pulp.

②chemical slurry preparation.
By a set of chemical pulping equipment to configure the CMC slurry, made by artificial materials, water quantity control. After completion of loading, artificial open mixing pulping machine began to pulping, according to the chemical water soluble time to determine the preparation time, this is a preparation process; Preparation process after the completion of the guarantee of slurry valve open, open the conveying screw pump, slurry to back to the slurry pool or slurry storage pool, when the store pond or back pond needs chemicals hydrolysate to adjust the mud index, available transmission function of the screw pump, through the inlet and outlet of the pump valve switch to the position of the chemicals.

③mixing system configuration peculiarity.

1）Mixing basic function. Any traffic flow balance: in the process of circulation loss can be compensated; Material balance: adjusting back to pit mud density in the set area; Timely compensation: in the bottom mud losses in great quantities, can be compensated rapidly.

2) Mixing basic flow process.

Through the secondary circulation unit processing of mud after chute into the tank to precipitate into the dough, slurry mixing pool can start the circulation pump, when mud index of mud to secondary treatment pulmonary circulation, filter or foreign abandon pulp by tank car. Adjusting the pulp slurry pool source new pulp slurry storage pool bentonite mud; Clear water reserviors in water ; Adjust the mud performance polymers.

3) Adjusting the pulp slurry pool sources.

The new pulp slurry storage pool betonies mud;

water in clear water reservoirs ;

The adjusting mud property of polymer;

4) Mud pool presentation

Mud pools: for concrete manufacturing, production of simple, clean and convenient.

Clear water reservoirs： can store down Wells or tap water， meet the demand of the pulping.

Tank: with natural precipitation to the secondary processing of mud, after processing the slurry into the mixing pool.

Mixing pool: storage for circulating slurry shield tunneling machine, and back to the slurry pool Unicom under processing.

Back to the pit: shield emergency treatment mud pools.

Chute: for mud slurry into the mud pit channel after processing equipment.

Shield pump pit: mixing pump and pumping pump installation site.

3. PLC control system:

①PLC centralized control system technical parameter table.

②PLC centralized control system function.

Mud purification system overall electrical equipment, location, relatively more scattered, mutual correlation degree is not high and the units need close cooperation characteristics of muddy water purification system and form a complete set of centralized unit electrical control of PLC control, the Winner group choice of Germany Siemens PLC module, has the advantages of high reliability, high performance and easy programming, according to the actual need to choose the high quality brand industrial control PC, combined with all kinds of hydrometer, flow meter, liquid level meter, such as automation instrument, to realize the working process of the whole system of remote control and real-time monitoring.

③system operating mode

In addition to some security, convenience and must be some local control unit, break up the main equipment in the system operation mode and automatic operation mode of two kinds of operating modes. Next to the unit is equipped with operating control cabinet, the local/remote selector switch. Through unit operation control cabinet button next to start stop device, the maximum guarantee reliability and flexibility of the control system. Automatic operation mode, according to the requirements set by the timing of the production process, the relationship between the chain order and set parameters, combined with all kinds of automation instrument such as hydrometer, flow meters, level gauge, timely adjust pump and valve, realize to automatic monitoring control system.

④electrical system as a whole to decorate Electrical control system for the overall layout. Layout design idea as the relatively concentrated and area, provide standard container type control room, provide the relatively comfortable operating environment.

4. Other supplementary information:

① flow and density measurement module

Adding in the separation equipment out of the slurry pipeline mud flow and density measurement module, the module PCLS data real-time transmission to the control center module, real-time monitoring project.

②mud proportioning design.

Mainly consists of betonies, CMS, soda ash and water: Raise the proportion of mud viscosity, the effect of betonies, suspension and thixotropy; CMS (Carboxymethy) to reduce the effect of filtration rate, increasing the viscosity. Soda ash (sodium) carbide adjust PH value, the dispersed particles of mud.

③the proportion of mud

To achieve the stability of excavation face,should be the surface deformation, to control within the minimum, hope mud is higher than is quite important. But the proportion of high mud making mud pump is in a state of overload, will incur mud treatment difficulties; The low proportion of mud, although has the advantages of reducing pump load, but it is produced from the formation of the increased amount of mud, delay the mud membrane.General mud weight of Yd in the range of 1.05 ~ 1.3 is appropriate.

④the viscosity of the mud

Through the mud from the funnel container to determine the viscosity mud flow of time, show the appearance of viscous (500 cc in clean water funnel viscosity is 19 seconds). Is often used around 25 ~ 40 seconds / 500 cc to mud.