Author: shale shaker screen

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As the “last mile” of sludge treatment, how to better treat sludge.

As the “last mile” of sludge treatment, how to better treat sludge has become a difficult problem for sewage treatment plants and local governments.

Sludge generally refers to the product of water purification in sewage treatment plants. As the product of sewage treatment, it mainly comes from the primary sedimentation tank, secondary sedimentation tank and other technological links. The sewage becomes clear after entering the sewage treatment plant, but the pollutants in the water are not eliminated completely, they are only concentrated and concentrated in the colloidal sludge deposited. It is understood that each cubic meter of sewage after treatment sludge production (according to the moisture content of 80%) is generally about 5 tons -10 tons, the specific output depends on the inlet water quality, sewage and sludge treatment process and other factors.

How much sludge does our country produce every year? Sludge as a byproduct of sewage treatment, its production is also increasing. Calculated with 80% water content, the total annual sludge production in China is expected to exceed 60 million tons by 2020.In addition, according to public information, about 30-50% of COD, 30%-45% of nitrogen and 90% of phosphorus in sewage were transferred to sludge. From the perspective of energy saving and emission reduction, if sludge is not treated in time, sewage treatment is equivalent to only one third of the process.

At present, China’s urban sewage treatment plants have basically achieved the initial reduction of sludge, but not the stabilization of sludge treatment. In the early stage, due to the absence of strict sludge discharge supervision, sewage treatment system and sludge treatment system were generally separated, and sludge treatment system was simplified or even ignored as far as possible. In sludge treatment industry, there are many treatment processes, different sludge often have different treatment methods. Traditional sludge disposal generally adopts sanitary landfill, incineration power generation, soil utilization and other methods.

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Main structure of KOSUN JM series jet mud mixer

Jet mud mixer also known as mud mixer, not only simple structure, but also strong feasibility. KOSUN’s JM series jet mud mixer is mainly used to prepare or increase the total amount of drilling fluid, change drilling fluid density, viscosity, water loss and other characteristics of the special equipment. The mud mixing device can meet the requirements of weight and preparation of drilling fluid for the solid control system of drilling from 1500 meters to 9000 meters. KOSUN JM series jet mixing device and shear pump matching effect is more prominent.

Main structure of KOSUN JM series jet mud mixer:

The jet mud mixer consists of a sand pump and a jet mixing funnel connected by manifold valve on a base. Safe and reliable performance, convenient transportation. The weighted funnel and the sand pump can be assembled or mounted separately. The weighted funnel and the sand pump can be connected by manifold valve.

At the same time, we can also make double jet mixing device and double jet mixing device according to customer’s requirements. The mixer consists of two sand pumps and two jet funnels, which can meet the requirements of large mixing amount.

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The translational elliptical vibrating screen is the fourth generation of new mud vibrating screen.

The translational elliptical vibrating screen is the fourth generation of new mud vibrating screen. Before the mud vibrating screen mainly choose linear vibrating screen, but now more and more drilling companies choose translational elliptical vibrating screen.

With the development of drilling technology, drilling depth is deeper and deeper, and mud requirements are more and more strict. Some complex geological conditions under the ordinary mud shaker can no longer meet the requirements of use. Moreover, the performance of the ordinary drilling vibrating screen is not very stable, and the effect of drilling vibrating screen treatment can not be adapted according to the drilling geology, often there will be some run-slurry or “horseshoe effect”. The appearance of the translational elliptical vibrating screen has solved these problems.

Advantages of translational elliptical vibrating screen:

1. Treatment capacity is increased by 25%-30% compared with linear vibrating screen;

2. Can adapt to a variety of geological conditions drilling mud recovery and purification;

3. The excitation force can be adjusted;

4. Linear vibrating screen has the advantages of translational elliptical vibrating screen have.

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Submersible slurry pump is vertical single-suction cantilever centrifugal pump.

Submersible slurry pump is vertical single-suction cantilever centrifugal pump, professional bearing seal, separated from the immersion of sand and gravel, effectively ensure the service life of the bearing, impeller for the semi-open impeller, impeller suction side extension of the impeller with a stirring impeller. There is no bearing between the fixed disc and impeller and pump shell, no seal and support, and no maintenance. It can transport medium with larger concentration of solid particles. Large suction capacity, wear-resistant alloy is used for flow parts. The liquid depth of submersible slurry pump is ≤2500mm.

Features and advantages of KOSUN submersible slurry pump:

1. The pump shaft under the liquid has sufficient stiffness. There is no bearing between the pump body, and the shaft seal is not used to transport the medium containing solid particles of greater concentration.

2. The length of the pump under the insertion liquid is between 800 and 2500mm, and suction pipe can be equipped if necessary;

3. The vertical motor is installed on the motor base and connected to the submersible slurry pump with a coupling

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KOSUN MD series efficient mud cleaner is the second and third level solid control equipment in the drilling fluid purification system.

KOSUN MD series efficient mud cleaner is the second and third level solid control equipment in the drilling fluid purification system, which can further separate the smaller solid particles contained in the mud processed by the vibrating screen, so that the mud can enter the four-level separation equipment. The cleaner can be used independently, or its bottom flow vibrating screen can be used as a parallel standby device of the first level solid control vibrating screen.

MD series high efficiency mud cleaner features:

1. Desander, desilter, shale shaker three in one, compact structure design;

2. Polyurethane cyclone, delay service life;

3. Detachable cyclone support, which is convenient for customers to convert into spreading and drying machine or desander and desilter;

4. Electric screen box Angle adjustment, convenient and reliable, and mechanical Angle adjustment for standby;

5. Screen box seal patent design, good sealing effect, long service life, and easy to replace;

6. The bottom frame of the screen box is made of stainless steel, which greatly improves the corrosion resistance and service life;

7. The overall heat treatment of the sieve box can work for a long time under high excitation intensity;

8. Plate frame mesh and wedge type screen pressing device facilitate rapid replacement of screen;

9. Adopt international brand vibration motor.

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Notes for use of KOSUN horizontal screw centrifuge.

1. Horizontal screw centrifuge shall not be used for separating inflammable, toxic, corrosive or radioactive substances.

2. Read the instructions carefully before preparing to install or operate the horizontal screw centrifuge.

3. Do not operate centrifuges with damaged or unmarked warning labels.

4. If the vibration amplitude of the machine exceeds the limit specified in the data list of installation, operation and maintenance of this manual, the centrifuge shall not be used.

5. When the feeding temperature exceeds the limit specified in the data list of installation, operation and maintenance of this manual, the centrifuge shall not be used.

6. Do not start the centrifuge when there is ice water, freezing or hard material in the drum.

7. Do not operate the centrifuge in excess of the maximum speed of the drum and the maximum density of the solids specified in the manual data list or on the nameplate of the centrifuge.

8. Do not operate the centrifuge without belt cover and other protective facilities.

9. Regularly check all automatic cut-off devices and monitoring systems to ensure their normal operation.

10. Do not disassemble thehorizontal screw centrifuge if it cannot be determined whether the centrifuge is completely stopped, whether the main power supply is completely disconnected, and whether the main switch is disconnected and locked safely.

11. Do not operate the centrifuge when cracks, dents, pores or grooves appear in the drum, motor or supporting frame of the centrifuge.

12. Do not operate the centrifuge when the motor is running in the direction opposite to the indicated arrow.

13. Do not start the machine until the centrifuge has been completely installed.

14. Follow all lubrication procedures and steps of the equipment.

15. Inspect centrifuge and motor bases and all supporting racks, housings and fittings at least once a year on a regular basis.

16. Do not place rags or loose clothing near rotating parts.

17. When disassembling, installing or operating and maintaining the machine, strictly follow the normal procedures.

18. Only specially trained technical personnel can operate, clean, dismantle and install the horizontal screw centrifuge.

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Technical features of KOSUN drilling waste management.

Drilling waste management, mainly with the constant improvement of the environmental protection requirement, puts forward higher requirements on drilling field cutting processing, the emergence of drilling waste purification system, not only can very good to solve the environmental problems, at the same time to the waste of the solid control system to produce secondary recycling, can maximize the retention of mud is useful at the same time, to focus again after processing of drilling cuttings curing processing, reduce the field work for the destruction of the environment. Its main equipment includes: vibrating screen, cuttings dryer, drilling fluid centrifuge, screw conveyor, screw pump and other equipment.

Technical features of KOSUN drilling waste management:

1. Adopt advanced slurry-drying technology, which can effectively recover useful liquid phase in drilling cuttings and achieve high efficiency curing treatment;

2. Low moisture content of useless solid phase after treatment, convenient for transportation;

3. Drilling cuttings drying for oil-based and composite base mud is very effective;

4. Further dewatering and screening the solid particles separated from the first-grade mud treatment to improve the overall treatment effect;

5. Adopt a unique grouting process when dealing with the solid phase of high-flow mud to improve the treatment efficiency;

6. Modular design, convenient and fast moving and transportation;

7. Concealed cable design, well site specification;

8. Simple and practical processing process, small variety of processing equipment, large processing capacity;

9. The whole set of equipment is simple to operate, with less labor and low cost of use and maintenance.

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Vertical cuttings dryer is a continuous operation of the dryer.

Vertical cuttings dryer is a continuous operation of the dryer. It has the characteristics of large processing capacity, low energy consumption, stable performance and good separation effect. It can continuously feed, dehydrate and unload the feed liquid at full speed. It is a kind of separation equipment with novel structure, advanced technology, high efficiency and low consumption. The machine is widely used in petroleum, chemical, mining, pharmaceutical and other industries.

With the continuous improvement of the country’s environmental protection requirements, major oil fields are confronted with the problem of drilling waste disposal.

KOSUN’s VC-1000 series vertical cuttings dryer can be used for various types of drilling mud, mainly for oil-base and composite mud cuttings drying. Similar to other solid control equipment, such as vibrating screen, centrifuge, cyclone separator. The treatment ability of VC-1000 series vertical cuttings dryer also has a great relationship with mud viscosity. Mud viscosity is determined by many factors, including solids content, particle size, drilling fluid type and drilling fluid temperature.

Features and advantages of KOSUN’s VC-1000 series vertical cuttings dryer:

1. Efficient solid-liquid separation can minimize the mud content in drilling cuttings and reduce the amount of waste disposal;

2. Effective separation and a larger proportion of the recovery mud, and reuse in the mud circulation system, can recover the mud due to the vibration screen slurry, mobile derrick and screen blockage;

3. Common wear parts can be replaced from the top of the device, and the belt can be replaced without moving any device;

4. The scraper of inner rotating body is sprayed with tungsten carbide anti-corrosion and wear-resistant material, which can prolong its service life and reduce the maintenance cost.

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Xi ‘an KOSUN’s main products of mud circulation system

Mud circulation system mainly includes by drilling fluid shale shaker, vacuum degasser, desander, desilter, sand mud removal machine, liquid gas separator, mixer, sand pump, shear pump, centrifuge, electronic ignition device, slurry mixing funnel, jet device, such as mud tank oil drilling mud solids control equipment and complete sets of circulatory system.

Xi ‘an KOSUN’s main products: drilling fluid shale shaker, vacuum degasser, mud cleaner, sand remover, mud remover, drilling fluid centrifuge, driller and other drilling mud solid control equipment, complete mud purification, recovery system and drilling mud treatment system.

Mud circulation system is suitable for mud circulation operation in oil well and water well drilling. Mud circulation system is also widely used in petroleum and gas exploration industry, trenchless engineering, geotechnical engineering, mining, metallurgy, coal, hydropower and other industries.

Functions and features of KOSUN mud circulation system:

1. The shell of the box is pressed and formed by steel plate, with beautiful appearance and high strength;

2. Modular and fast combination design, suitable for different types and specifications of drilling rig configuration requirements;

3. Complete mud treatment equipment combination, adapt to the mud treatment requirements of modern complex drilling technology;

4. Mud circulation system can be designed and configured according to user’s requirements.

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Shear pump is one of the necessary pumps for drilling fluid treatment.

Shear pump is one of the necessary pumps for drilling fluid treatment. Used in solid – liquid separation system to improve drilling fluid performance.

1. The overall structure is compact and elegant;

2. Special impeller and shear plate are adopted, with shear efficiency greater than 95%;

3. The impeller and shear pump are made of stainless steel, and the flow parts are made of high wear resistant cast iron;

4. The use of mechanical seal mainly, pan root seal as a supplement of the combination of compound seal, mechanical seal using hard alloy, its service life is 6 times the ordinary mechanical seal.

The SP series shear pumps produced by xi ‘an KOSUN are specially used to shear the polymers of drilling fluid. The polymers in the drilling fluid system should be fully cut in advance and then enter the drilling fluid system to improve the performance of the drilling fluid.

SP series shear pump is a new type of equipment designed by KOSUN to provide customers with fast preparation and treatment of mud, which can meet the requirements of users to prepare high-performance mud. SP series shear pumps can mix effectively. It is an ideal drilling fluid solid control equipment, which can fully hydrate drilling fluid, save mud material, shorten mud preparation time, and provide good mud performance for drilling process.