标签： Solid control equipment

Slurry water treatment system is mainly set on the ground, by the pulping system, slurry system, slurry water transport system and slurry water separation system of 4 sub-systems, mainly including swelling tank, slurry mixing tank, water tank, return slurry tank, sedimentation tank, cyclone, vibrating screen, filter press and a variety of valves, pipes and pumps. The slurry prepared by the pulping system, after adjusting the index of the pulping system, is transported by the slurry conveying system to the slurry tank of the shield. The slurry sent to the surface by the slurry pump is separated and discharged step by step according to the particle size by the pre-screening treatment, the primary cyclone treatment and the secondary cyclone treatment. The slurry after the separation of the residue is sent to the slurry mixing system again for property adjustment, so that it becomes a high-quality slurry and then recycled to the slurry tank.

 

 

The maximum slurry capacity of the separation system is 3 300 m3 /h, with 3 stages of separation: The first stage is pre-screening separation, using the vibration of the vibrating screen to sift out the particles with a particle size of more than 3mm in the mud, the second stage is 1 stage swirl separation, the separation particle size d50 = 74μm, the third stage is 2 stage swirl separation, the separation particle size d50 = 20μm. Cyclone working principle: Under the action of pressure, the mud passes into the cyclone, and the slurry fluid inside the cyclone produces high-speed rotation. Due to the effect of centrifugal force, the larger particles are thrown to the inner wall and discharged from the underspillway along the conical shell under the action of self-weight. At the same time, negative pressure is generated at the center of the high-speed rotating cyclone. Fine particles with low specific gravity flow out of the upper spillway under the action of negative pressure.

In modern industrial production, shale shaker as an important screening equipment, widely used in mining, chemical industry, construction, metallurgy and other fields. Its main function is to separate the material according to the particle size to ensure the efficiency and refinement of the production process.

 

1.1 Working principle of shale shaker 

The  shale shaker generates high-frequency vibration through the motor to drive the vibrating body, so that the material jumps or rolls along the screen surface, and then achieves the effect of screening. According to different vibration modes, the  shale shaker  can be divided into linear  shale shaker , circular shale shaker and oval shale shaker .

 

1.2 Advantages of  shale shaker 

 

Efficient screening: can efficiently handle large flow of materials, high screening accuracy, suitable for the classification of various granular materials.

Energy saving and environmental protection: Compared with traditional screening equipment, vibrating screen has higher energy efficiency and can effectively reduce energy consumption.

Strong durability: Made of high-quality materials, the vibrating screen has a long service life in long-term work, reducing the maintenance frequency of the equipment.

1.3 Application field of shale shaker 

 shale shaker not only plays an important role in mining, but also widely used in building materials, metallurgy, food, fertilizer and other industries. In each industry, the vibrating screen can effectively improve production efficiency and reduce resource waste according to the different characteristics of the material.

 

2. The application and advantages of vibrating screen in mining industry

There is a huge demand for vibrating screens in the mining industry because screening is an integral part of the ore processing process. The vibrating screen can efficiently separate the useful minerals and impurities in the ore and improve the quality of the ore.

 

2.1 Working principle and structure of vibrating screen

The core of the vibrating screen is the screen and vibration device. The vibration device is driven by the motor to produce strong vibration, and the material jumps and rolls on the screen, so as to separate the material of different particle sizes. According to different requirements, the vibrating screen is designed with different screen size, tilt Angle and vibration frequency to ensure the high efficiency of the screening process.

 

2.2 Technical advantages of vibrating screen

 

High screening accuracy: It is especially suitable for the screening of fine-grained ores, and can accurately separate minerals of different particle sizes.

Strong adaptability: the vibrating screen can handle a variety of ores, such as iron ore, bauxite, copper, etc., and can cope with a variety of complex working environments.

Reduce production costs: By improving screening efficiency, reduce the waste of unqualified materials and reduce production costs.

2.3 Maintenance and maintenance of vibrating screen

In order to ensure the long-term stable operation of the vibrating screen, regular inspection of the screen, vibration system and motor is essential. Proper lubrication and timely replacement of worn parts help to extend the service life of the equipment.

Introduction to trenchless horizontal directional drilling III
 

Definition and proportioning parameters of mud
 

Definition of mud: trenchless mud refers to the addition of a certain proportion of clean water with a PH value of 8 to 9
 

A mixture of bentonite and other chemical agents having a certain bulk weight and viscosity. The grading parameters of the mud: the ratio of bentonite and other chemical agents is generally 4% to 6%, and the bulk weight is between 1.05 and 1.2. In different soil layers, the mix, bulk density and concentration of mud are all different. Understanding the soil layer and ratio is of great guiding significance for trenchless mud treatment and pulping. The commonly used ratio is as follows:

Soil layer: clay;

Mud ratio: Bentonite 1: soda ash 0.04: fluid loss reducer 0.06: lubricant 0.06;

Slurry characteristics: bulk density: 1.05~1.07; Viscosity: 35~40 "; PH: 8.5~9; Water loss: 4~7ml;

Soil layer: sand layer;

Slurry ratio: Bentonite 1: polymer 0.05: lubricant 0.06;

Slurry characteristics: bulk weight: 1.05; Viscosity: 50~65 "; PH: 8.5~9; Water loss: 4~5ml;

Soil layer: pebble layer;

Slurry ratio: Bentonite 1: polymer 0.03: fluid loss control agent 0.04: lubricant 0.03;

Slurry characteristics: bulk density: 1.05~1.10; Viscosity: 60~70 "; PH: 8.5~9; Water loss: 4~5ml;

 

1. Improve oil removal efficiency

Function: Thermochemical agents can effectively destroy the oil-water interface in the sludge and promote the separation of oil and water.

Effect: significantly improve the efficiency of oil removal and reduce the oil content in the sludge.

 

2. Reduce processing costs

Action: Through the action of chemical agents, reduce the energy consumption of mechanical and thermal treatment.

Effect: reduce the overall processing cost and improve economic efficiency.

3. Improve sludge dewatering performance

Action: Chemical agents can change the surface properties of sludge particles and promote particle aggregation.

Results: Improve sludge dewatering performance and facilitate subsequent treatment.

4. Reduce secondary pollution

Function: Effectively remove the harmful substances in the sludge, reduce the discharge of pollutants in the treatment process.

Effect: Reduce the risk of secondary pollution and protect the environment.

5. You're adaptable

Function: For different sources and properties of oily sludge, the formulation can be adjusted.

Effect: Strong adaptability to meet the needs of diverse processing.

6. Promote resource recycling

Function: Efficient separation of oil and water, easy to recycle oil.

Effect: Promote resource recovery and improve resource utilization.

7. Shorten processing time

Function: Accelerate oil-water separation and sludge dewatering process.

Effect: Shorten the processing time and improve the processing efficiency.

Sum up

Thermochemical agents are critical in oily sludge deoiling, increasing efficiency, reducing costs, improving dewatering performance, reducing pollution, adapting to diverse needs, facilitating resource recovery and shortening treatment times. The selection of appropriate agents and processes is crucial to the treatment effect and economic benefits.

Definition and ratio parameters of mud in the construction of trenchless horizontal directional drilling

 

Definition of mud: trenchless mud refers to the mixture of bentonite and other chemical agents added in a certain proportion of clear water with a PH value of 8 to 9,
which has a certain bulk weight and viscosity. The grading parameters of the mud: the ratio of bentonite and other chemical agents is generally 4% to 6%,
and the bulk weight is between 1.05 and 1.2. In different soil layers, the mix, bulk density and concentration of mud are not nearly the same.

The mixing mud mainly has the following main components;

Clay layer: bentonite, soda ash, fluid loss control agent, lubricant, approximate ratio: 1:0.04:0.06:0.06;

Sand layer: bentonite, polymer, lubricant, approximate ratio: 1:05:06;

Pebble layer: bentonite, polymer, anti-loss agent, lubricant, approximate ratio: 1:0.03:0.04:0.03;

Action of pulping agent: in the sand layer, if only clean water is used, the water will be lost to all sides, and the hole cannot be perforated;
If only clean water is used in the clay layer, most of the water will be sucked away by the clay layer, and a small part will be discharged out of the hole.
The clay in the hole will expand due to water absorption and be washed and scraped by the reamer into a block and remain in the hole,
resulting in the hole cannot be formed into a hole. In the rock layer, the rock is ground into sand particles and deposited in the lower layer of the pore,
and the water flows out of the pore in the pore, and the sand particles cannot be discharged out of the pore, and the pore cannot be formed.
Therefore, in the process of guiding, reaming, and towing the pipe, if no mud powder is added and only water is used, the hole cannot be formed,
and the towing pipe is doomed to fail.

 

Solid control equipment plays an indispensable role in oil drilling, building piling, and many industrial scenarios involving solid-liquid separation. They operate silently, but have a profound impact on production efficiency, product quality, cost control, and environmental protection. With the continuous evolution of industrial technology, solid control equipment is also continuing to innovate to adapt to increasingly complex production needs.

 

1. Basic concept and working principle of solid control equipment

Solid control equipment, that is, solid control equipment, is mainly used to separate and treat solid particles in liquids. In oil drilling operations, drilling fluid (mud) carries a large number of solid particles such as cuttings during the cycle. The task of solids control equipment is to separate these particles from the drilling fluid so that the drilling fluid can be reused. Common solid control equipment includes vibrating screen, desander, desilter, centrifuge, etc., which work together according to different working principles.
 

The shale shaker  is the first line of defense of the solid control system. Through high-frequency vibration, the drilling fluid flows on the screen, the larger particles of cuttings are trapped and discharged by the screen, and the liquid and smaller particles enter the next level of treatment equipment through the screen. The sand remover and mud remover use the principle of centrifugal force, when the liquid containing solid particles enters the cyclone along the tangential direction, the heavier particles are thrown to the wall under the action of centrifugal force, and move down the wall, and discharged from the bottom; Lighter liquid flows out of the top overflow port. Centrifuges work on the same principle of centrifugal force, but they can achieve a finer separation, can separate very fine solid particles from the liquid, often used for deep treatment of drilling fluids.

 

Ensure safe and efficient drilling operations

In the process of oil drilling, if the content of solid particles in drilling fluid is too high, the density and viscosity of drilling fluid will increase, and the fluidity and cutting-carrying capacity of drilling fluid will be affected. This will not only increase the wear of the bit, reduce the drilling speed, but also may cause serious accidents such as sticking. Solid control equipment can effectively separate solid particles in time, maintain the good performance of drilling fluid, and ensure the safe and efficient drilling operation. For example, in complex environments such as deep-sea drilling, high-performance solid control equipment is essential to ensure the stable operation of the drilling platform and drilling schedule.
 

Reduce production costs

Drilling fluid is an important consumable in oil drilling operations, and high-quality drilling fluid is expensive. Recycling drilling fluid through solid control equipment can greatly reduce the amount of new drilling fluid preparation, thus reducing production costs. According to statistics, a set of efficient solid control system can make the repeated utilization rate of drilling fluid reach more than 80%, which saves a lot of raw material procurement costs for enterprises. In addition, solid control equipment reduces the wear caused by solid particles on equipment, prolonging the service life of drilling equipment, and further reducing equipment maintenance and replacement costs.
 

An important barrier for environmental protection

Oil drilling operation will produce a large number of waste drilling fluid containing solid particles and chemicals, if discharged at will, it will cause serious pollution to the surrounding environment such as soil and water. Solid control equipment separates solid particles from liquid through effective treatment of drilling fluid, and the separated solids can be disposed of in landfill or other compliant disposal after harmless treatment, while the treated liquid can be safely discharged or further reused if it meets discharge standards. This greatly reduces the negative impact of oil drilling operations on the environment and helps the oil industry achieve green development.
 

Third, solid control equipment in other industrial fields of application expansion

Construction piling industry

In building piling construction, mud will also carry a lot of solid particles such as drilling slag. The solid control equipment can treat the piling mud, realize the recycling of the mud, and reduce the mud discharge. This not only helps to protect the environment, but also reduces the cost of piling construction, especially in urban centers and other areas with high environmental requirements, the application of solid control equipment is particularly important. For example, in the pile foundation construction of large urban complex, the use of solid control equipment to treat mud can effectively avoid the blockage of urban drainage system and environmental pollution caused by mud discharge.

 

Energy saving and environmental protection

In the context of global advocacy of energy conservation and emission reduction, solid control equipment manufacturers are committed to the development of more energy-efficient and environmentally friendly technologies. On the one hand, by optimizing the equipment structure and working parameters, the separation efficiency of the equipment is improved and the energy consumption is reduced. For example, the new centrifuges use efficient motors and advanced transmission systems to ensure separation while reducing energy consumption. On the other hand, the development of environmentally friendly separation media and treatment agents to reduce the potential harm to the environment. For example, some solid control equipment uses biodegradable flocculants to achieve efficient solid-liquid separation while reducing the environmental impact of chemicals.

Fine and multi-functional

 

Shale shaker  and spray is a common technical improvement in the process of solid-liquid separation or mud treatment, mainly used to improve the separation efficiency and treatment effect. The following is a detailed description of its role, treatment effect and advantages:

effect

Auxiliary cleaning of solid particles:

The spray system rinses the material on the screen by spraying water, effectively removing the mud or fine matter attached to the surface of the particles to prevent blocking the screen aperture.

 

Improve screening efficiency:

Spray water can help separate the fine particles from the larger ones, making the screening more thorough.

 

Reduce material adhesion:

When dealing with mud containing more viscous substances, spraying water can reduce the accumulation and adhesion of materials on the screen, and improve the operating stability of the vibrating screen.

 

Keep the screen clean:

When the vibrating screen runs for a long time, it is easy to block the network because of particle accumulation. The spray device can wash the screen in time to keep the screen smooth.

 

Treatment effect

Separation efficiency:

The addition of spray water can significantly improve the separation efficiency of fine particles, especially in the treatment of fine sand and powder materials.

 

Reduction of solid content in mud:

By spraying, the liquid can be separated from the solid more efficiently, so that the solid content of the sieve increases, and the solid content of the liquid under the sieve decreases.

 

Improved mud recovery:

The spray water can wash out the recyclable liquid attached to the solid, improving the recovery rate of the mud.

 

Enhanced operational stability:

Reduce screen clogging, extend the continuous working time of the vibrating screen, and improve the overall production efficiency of the equipment.

 

advantage

Strong adaptability:

Vibrating screen and spray can handle high viscosity, high fine particle content of the material, to meet the needs of different working conditions.

 

Maintenance cost reduction:

Spray water can reduce the frequency of screen clogging, thereby reducing the frequency of manual cleaning and screen replacement.

 

Environmental protection:

Spraying can reduce the solid content of tailings treated by mud, reduce the burden of subsequent treatment, and be more environmentally friendly.

 

Improve the working environment:

Spraying water can reduce the diffusion of material dust, improve the site working environment, and reduce worker health risks.

 

Application scenario

Drilling waste slurry treatment: improve solid-liquid separation efficiency in waste slurry.

Mine tailings treatment: efficient screening of fine particles, improve resource recovery.

Aggregate production: Clean fine dust and soil in sand and stone.

Environmental protection: Fine treatment of solid-liquid separation in wastewater and waste pulp.

 

Sum up

The vibrating screen and spray system can effectively improve the screening efficiency, reduce the solid content in the solid-liquid mixture, and reduce the maintenance cost and the risk of network blockage, which is an important auxiliary device to improve the overall processing capacity of the vibrating screen. This is particularly evident in demanding solids control and mud handling scenarios.

 

Kosun KS-60 sludge water separation system is designed for sludge water separation in silting construction. The system meets the requirements of desilting process. The whole system is composed of two functional modules: screening swirl and centrifuge, which can adapt to different construction site layout. The selection of auxiliary equipment and other materials conforms to the corresponding national standards. The solid phase can be separated from the liquid phase in the tail slurry, the solid phase can meet the conditions of external transport, the liquid phase can be reused or discharged, and the mud can completely achieve zero discharge and meet the requirements of environmental protection.

 

 

Kosun KS-60 sludge water separation system is designed for sludge water separation in silting construction. The system meets the requirements of desilting process. The whole system is composed of two functional modules: screening swirl and centrifuge, which can adapt to different construction site layout. The selection of auxiliary equipment and other materials conforms to the corresponding national standards. The solid phase can be separated from the liquid phase in the tail slurry, the solid phase can meet the conditions of external transport, the liquid phase can be reused or discharged, and the mud can completely achieve zero discharge and meet the requirements of environmental protection.