Mud Solids Control Equipment

GN is a major centrifuge manufacturer with state-of-the-art manufacturing processes and advanced domestic and international processing technologies. The manufacturing precision of advanced imported processing equipment guarantee equipment in Taiwan, Germany and Italy has reached international standards. Mainly involved in the industry: drilling fluid solid control treatment, industrial wastewater treatment, waste mud treatment, oil residue separation, municipal sewage purification engineering, mining wastewater treatment, river dredging and so on. It is especially suitable for the solid solution with small particle size, small solid-liquid two-phase density difference (solid-liquid phase specific gravity difference >0.05), and the integration scheme of liquid-solid separation occasions where separation is difficult. It can also be used for separation between liquids or between liquid and solid. It has been widely used in modern industrial processes, and is widely used in chemical, food, light industry, paper, mining and other industrial fields.

 

Some parts are characterized by:

 

1, auger

 

The screw ejector is the core component of the centrifuge. Its main function is to transport sediment and provide drainage channels. Its structure, materials and parameters are not only related to the production capacity and service life of the centrifuge, but also directly affect the efficiency and separation of slagging. effect. The machine adopts a column/conical spiral, which consists of a spiral blade, a mandrel, a spiral-shaped end shaft, etc., and is supported on the drum-sized end cap by bearings on both ends of the journal, and the bearing is lubricated with grease.

 

All important parts of the GN solid control centrifuge are made of 2304 duplex or 304/316 stainless steel.

 

The spiral blade is inlaid into a replaceable wear-resistant alloy piece, which can extend the service life of the pusher. The acceleration cone output port of the mandrel is equipped with a replaceable alloy grinding port wear-resistant sleeve, and the acceleration shaft of the mandrel is equipped with an acceleration. Strip design can improve the processing effect. The use of open-cell spiral blades improves the clarification effect.

 

2, the host base

 

It mainly plays the role of supporting and installing the whole rotary system. It also plays the role of vibration damping and vibration isolation together with the vibration isolator to reduce the propagation and influence of the vibration of the centrifuge to the external environment. The integrated steel structure welding machine base supports the whole rotating body (consisting of drum, spiral, differential, etc.) through the bearing seats at both ends, and the split-type sealed stainless steel collecting box covers the entire rotating body and is installed on the machine base. The elastic vibration isolator is installed at the bottom of the base, and the sensor cable is arranged on the bottom of the base. The main and auxiliary motors are arranged at one end of the base, and the inlet pipe is arranged at the other end. The overall layout of the GN makes the machine compact, small footprint and easy to maintain.

 

3, bearing housing

 

The bearing is grouting to ensure the stable operation of the centrifuge. The bearing seat is divided into a large end bearing seat and a small end bearing seat. The bearing housing body is cast by cast iron, the bearing inner ring is respectively mounted on the large end cover, and the whole rotating body is in two main bearings. Internal rotation, lubrication with circulating oil, labyrinth seal on both sides of the bearing.

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GN solids control’s oversized drum 30-inch GNLW764A horizontal screw centrifuge is sold to the Australian mining industry. This Australian customer ordered two sets of oversized drum 30-inch GNLW764A horizontal screw centrifuge. The oversized drum 30-inch GNLW764A horizontal snail The centrifuge is an Australian customer who has chosen to cooperate with a number of horizontal and horizontal centrifuge manufacturers at home and abroad.

The oversized drum 30-inch GNLW764A horizontal screw centrifuge produced by GN solids control is widely used in oilfield waste treatment, mining industry and shield waste processing industry. Up to now, the oversized drum 30 inch GNLW764A horizontal screw centrifuge is used in various industries. There have been many successful use cases in the field, and customer evaluation is very high.

 

During the on-site use, the oversized drum 30-inch GNLW764A horizontal screw centrifuge separates the material from the bentonite mud through efficient and continuous separation. After that, the mud water returns to the mud-water loop and is reused. The GNLW764A decanter centrifuge has a large diameter, a high aspect ratio and a separation factor of up to 3000G, which enables a larger throughput and discharges a clearer liquid. GN can provide a flocculation dosing system for chemistry according to customer requirements. The auxiliary decanter centrifuge separates the mud to obtain clean water that can be discharged. GNLW764A horizontal screw centrifuge speed, differential speed, liquid pool depth flexible adjustment to adjust the slag dry humidity.

 

GN can produce various types and length-to-diameter ratio centrifuges to meet the needs of customers in various industries from small to large. Welcome customers to visit GN’s factory to visit and discuss cooperation.

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With the maturity of the mud-free market, more and more customers are using GN solid-control vertical cutting dryers. Since the dryer is a high-speed operation equipment like decanter centrifuge, it requires high internal parts and it is especially important to carry out necessary maintenance and maintenance on a regular basis. The following is a brief introduction to the daily maintenance and maintenance of the dryer.

 

After the first use of the dryer for half a month, the new oil should be replaced. Every other month, the oil filter net is cleaned with kerosene once, and the oil contamination and deterioration are checked. The oil change time is determined according to the oil quality. The maximum length cannot exceed six. Months. When replacing the new oil, the oil pipe, oil filter net and fuel tank should be cleaned. If the oil filter net is worn or damaged, replace the new oil filter net and check the tightness of the oil pipe. Check the oil level every two weeks (through the oil mark), and add new oil when the oil quantity is insufficient.

The main motor and oil pump motor are lubricated separately with grease. The motor grease is replenished every 2,500 hours. The grease is recommended according to the manual.

During the working process, if the oil temperature is too high, the oil pressure is low or high, and the oil quality is deteriorated, stop the machine immediately.

Inspection and routine maintenance

Daily routine inspection content:

 

1. Whether the vibration of the dryer is abnormal;
2. The temperature of the main bearing, normal temperature T ≤ 90 ° C;
3. Whether the screws of each component are loose;
4. Whether the slagging and slurrying conditions and the slurry line leak slurry, and whether the inlet and outlet are blocked;
5. Whether the lubrication system has oil leakage or abnormality.

If there is any abnormality in the above inspection, it should be stopped immediately for processing.

 

Check the content regularly:

 

1. Check the tightness of the narrow V-belt every 1000 hours of operation, too loose to adjust; wear should be replaced;
2. Every 1000 hours of operation or excessive vibration, check whether the parts of the equipment are loose, check whether the sensors are connected reliably;
3. Every other month, the oil filter is cleaned with kerosene once, and the oil contamination and deterioration are checked. The oil change time is determined according to the oil quality, and the maximum time cannot exceed six months;
4. Check the oil level every two weeks (through the oil mark), and add new oil when the oil quantity is insufficient;
5. Push and pull the scraper handle every two hours to prevent slag.

In addition, if there are special circumstances, it is necessary to stop the inspection in time to find the cause of the problem and avoid further spread.

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The GN solid-controlled armoured waste slurry treatment system is a circulating purification and armor treatment system for waste mud designed and manufactured by GN engineers according to the user’s requirements and according to the customer’s requirements for the treated mud. The main core equipment of this system is GNZS594E-HB for coarse particle screening or high-speed decanter centrifuge with same level shale shaker and GNLW363C-VFD (with 20-foot flocculation dosing system to improve the treatment effect of centrifuge), and system Supporting feed screw pump, armor processing tank, agitator, etc. According to the specific requirements of the customer for the discharge, different flocculating agents can be adjusted to ensure that the discharge meets the customer’s expected treatment effect.

System composition and parameters:

 

The system has two warehouses: one is a premixed screening bin, and the other is a centrifuge liquid collection bin; the entire system is centrifuged to remove most of the solid particles above 2 μm.

The premixed screening bin is equipped with a stirrer and heating pipeline to ensure sufficient mixing of the feed and improve the mixing degree of the demulsifier. The same four can be used together with other equipment.

System design mud processing capacity: 30 m3 / h, adapt to the environment: -15 ° ~ 50 °

Adapt to mud viscosity: ≤45 S

Adapt to climatic conditions: rain, snow, fog weather.

Continuous operation at rated power for improved work efficiency.

Working height range: It can work normally at altitude ≤ 2500 m, and it can work effectively when the altitude is ≥ 2500 m.

All equipments in the system are mature technology new products, and the technical performance meets the relevant requirements of SY/T5612-2007 “Code for Design of Solid Dose Control Equipment for Petroleum Drilling Fluids”.

The actual principle requirements of the whole system: the whole machine is reasonable in design, compact in structure, flexible in combination, advanced in technology, convenient in operation and maintenance, and safe and reliable in performance.

The system is easy to dispatch, transfer and transport, and can meet domestic and international road transport regulations.

 

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This month, GN will ship out 9 sets drilling fluids shale shakers ordered by a Shandong client. Shale shaker is one the main products in GN production line. With more than 10 years’ experience in designing and manufacturing the shale shaker for drilling fluids recycling, GN has upgraded several versions of the shale shaker for better meeting clients’ requirement and the onsite performance.

The shale shaker is mainly used to remove the coarse solids in the drilling fluids recycling or other separation job. GN has 3 standard series of shale shaker as per application and capacity.

Drilling fluids shale shaker GNZS703F is with treating capacity of 120 cubic meters per hour, and it can be used in normal oil drilling solids control system and larger capacity trenchless drilling mud recycling system. This model is with 3 panelshaker screens and can be upgraded to GNZS706 double layer shale shaker with 6 panel screen for large capacity and both coarse and find solids separation.

GNZS594F is a shaker model with 4 panel screens for capacity of 140 cubic meters per hour. The screen matching this shaker is interchangeable with world famous brand. By changing the feeder to a hopper type, this model shale shaker could be used as a high G force drying shaker used in drilling waste cuttings management system.

GN also has small capacity mini shaker model GNZS752F with 2 panel screens, 45 cubic meters per hour. This model could be used in small HDD mud system, piling project and diamond core drilling project. It is worthy to mention that this model can also be upgraded to GNZS753F with 2 layers screen.

All GN drilling fluids shale shaker is provided with installed composite frame shaker screen with much durable features and long working lifetime. Client can find almost all the popular replacement shaker screen in GN. Please click below link for more information on GN Screen Purchasing Reward Point policy to get a shale shaker with big discount.

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There are usually two options for selecting a solid-liquid separation device.

(1) Plate and frame sludge dewatering machine:

The plate and frame filter press is extruded through the plate frame, so that the water in the sludge is discharged through the filter cloth to achieve the purpose of dehydration. It is mainly composed of concave man filter plate, frame, automatic-pneumatic closed system measuring plate suspension system, filter plate vibration system, air compression device, filter cloth high-pressure flushing device and fuselage side photoelectric protection device. Advantages: low price, good at dehydration of inorganic sludge, low moisture content of mud cake.

Plate and frame sludge dewatering machine

Disadvantages: easy to block, need to use high pressure pump, not suitable for dewatering of oily sludge, it is difficult to achieve continuous automatic operation.

When selecting equipment, you should consider the following aspects:

1 The requirement for the solid content of the mud cake. Compared with other types of dewatering machines, the general plate and frame filter press has the highest solid content rate of up to 35%. If considering the factors of reducing sludge accumulation, the plate and frame filter press should be the preferred solution.

2 frame material.

3 filter plate and filter cloth material. Corrosion resistance is required, and the filter cloth must have a certain tensile strength.

4 How the filter plate moves. The requirements can be fully or semi-automatically completed by hydraulic-pneumatic devices to reduce the labor intensity of the operator.

5 filter cloth oscillating device, so that the filter cake is easy to fall off. Compared with other types of dewatering machines, the biggest disadvantage of plate and frame filter presses is the large footprint. At the same time, due to the intermittent operation of the plate and frame filter press, the efficiency is low, the operating environment is poor, and there is secondary pollution. The domestic large-scale sewage treatment plant has rarely been adopted.

(2) Horizontal screw sedimentation centrifuge:

The horizontal screw sedimentation mud centrifuge is mainly composed of a transfer and a screw conveyor with a hollow shaft. After the sludge is sent into the drum by the hollow shaft, the centrifugal force generated by the high-speed rotation is immediately turned into the hub cavity. The sludge particles have a large specific gravity, and thus the centrifugal force is also large, and the crucible is attached to the inner wall of the rotating hub to form a solid layer; the water density is small, the centrifugal force is also small, and only a liquid layer is generated inside the solid layer. The sludge of the solid layer is transported to the cone end of the transfer under the slow push of the screw conveyor, and is continuously discharged through the outlet around the transfer. The liquid is discharged from the overflow to the transfer, and is collected and discharged to the centrifuge.

Horizontal screw sedimentation centrifuge/Decanter centrifuge

Advantages: Large processing capacity.

Disadvantages: high power consumption, not suitable for solid-liquid separation close to specific gravity.

The most critical component of the horizontal screw settlement drilling fluid centrifuge is the hub. The larger the diameter of the hub, the greater the dewatering capacity. The longer the reloading length, the higher the solid content of the sludge. During use, the revolving speed is an important control parameter, which controls the rotation speed of the rotating hub, so that it can obtain high solid content and reduce energy consumption. It is the key to the operation of the centrifugal dewatering machine. A low speed centrifugal dewatering machine is often used. When selecting the centrifugal dewatering machine, the outer edge of the runner or the screw is extremely easy to wear, and the material has special requirements. The spiral outer edge of the new centrifugal dewatering machine is mostly made up of assembly blocks for replacement.

 

The centrifugal dewatering machine has the disadvantages of high noise, high energy consumption and low processing capacity. There are only a handful of domestic manufacturers that can produce centrifuges suitable for high specific gravity mud separation.

 

The horizontal screw-type sedimentation centrifuge produced by Hebei GN Solid Control Co., Ltd. has a mud cake solid content of more than 30%, and the operation is carried out in a completely enclosed environment. There is no sludge and sewage around the dehydrator. The absence of a foul odor can greatly improve the working environment of the operating personnel and is therefore favored by the industry.

The specific equipment selection should be based on the material to be separated and the separation effect to be achieved.

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At present, there are many methods for the treatment and disposal of oily sludge in oil fields. The treatment processes are generally concentrated, conditioned, dehydrated, discharged and comprehensively utilized.

In terms of processing technology, the typical sludge treatment processes in China are:

1. Oily sludge – natural evaporation pond;

The process is simple, and the sludge discharged from the innumerable treatment system is directly discharged into the natural evaporation pond for natural evaporation, and the water content in the mud-containing sewage is high, so a large evaporation pond is required. In the colder and more rainy eastern oilfields, the application effect is poor, and the phenomenon that the sewage overflows the evaporation pool often occurs, causing pollution of the surrounding environment.

2. Oily sludge – sludge concentration tank – sludge drying field;

3. oily sludge – concentration – panning and salt removal – flotation degreasing – pressure filtration dehydration;

The oily sludge is concentrated and settled (concentrated by adding medicine), and after reducing the water content, according to the salt content of the original mud, the water is washed in proportion to reduce the salt content. The sludge is separated by flotation, and finally subjected to pressure filtration dehydration to obtain a filter cake.

4. Oily sludge – sludge separation tank – concentration tank – high speed centrifugal separation – dry sludge tank.

The process is to dewater the crude oil, and the various equipments of the sewage treatment system will discharge the oil-containing sewage and the backwash water into the sewage buffer pool for uniform flow into the sludge separation tank. The oil and cement three-phase separation is carried out in the sludge separation tank, and the sewage oil and sewage return system of the branch is reused. The sludge in the branch office contains about 99% water. Then, the sludge pump is used to drive the concentration pump, and the concentrated floc deposit enters the centrifuge for dehydration. The dehydrated 30%~60% water sludge is stored in the dry sludge tank.

The high-specific gravity mud centrifuge produced by Hebei GN Solids control. is a special centrifuge specially used for the separation of floc sediments in the fourth process. At present, the application of multiple sludge separation projects has been carried out in domestic and foreign oil fields.

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With the development of petroleum industrialization, the pollution problem brought by the drilling process has received more and more attention. At present, there is no recognized effective treatment process suitable for drilling waste liquids in China, mainly because of the wide variety of drilling fluids and working fluid systems, complex compositions and different usage conditions. Techniques that result in waste fluids for a particular type or region of an oil field are not necessarily suitable for use with other types or regions of waste. In addition, compared with the current comprehensive level of sewage treatment in the petroleum industry, the treatment cost of drilling waste liquid and wastewater is relatively high, and the treatment effect is general. Overall, the current drilling wastewater treatment technology is still far from satisfactory.

 

Mainly manifested in:

1, the treatment agent is not high efficiency, can not fully achieve the treatment effect

2, the treatment method is single, the depth of pollutant removal is limited, and the treatment effect on some pollutants is not good

3. The continuous processing device is not targeted, and the processing cost is high, resulting in reduced efficiency.

According to the above analysis, no matter the above-mentioned treatment technology has a certain range of application, the method selection should be based on a certain method, according to the nature of the waste drilling fluid produced by each oil field and the geography, climate, and location of each oil field. The most reasonable optimization of the characteristics of the environment, and in order to more effectively control the problem of drilling wastewater pollution, it is recommended that future research work should not only strengthen the source and process control, but also develop new technologies. Specifically, there are the following aspects:

1. Promote clean production, cure the symptoms and improve the efficiency
2. Develop low-cost, high-performance environmentally friendly drilling fluids to help promote technology
3. Research and development of new drilling fluid water treatment agent and unified technology to improve overall processing technology
4. Develop a new technology for harmless comprehensive utilization and make environmentally friendly technologies
5. Strengthen management control, strengthen process supervision, and control from the source

The clean production drilling fluid purification equipment developed by Hebei GN Solids Control Co., Ltd. can effectively reduce the generation of drilling waste, reduce the amount of waste liquid generated by 30~50%, and effectively reduce the cost of harmless treatment. The reduction in the degree of environmental pollutants.

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In general, the typical sources of waste sludge oil sands are as follows: 1) Waste sludge oil sands produced by crude oil tank cleaning 2) Waste sludge oil sands of refineries 3) Drilling waste oil sands. What are the characteristics and hazards of these oil sands?

 

(1) Characteristics of oil sludge:

Its physicochemical properties are very complex, generally containing aged crude oil, waxy, asphaltenes, colloids and solid suspended solids, bacteria, parasites, salts, acid gases, corrosion products; a small amount of mechanical impurities, heavy metals and salts; Benzene, phenols, strontium, barium and other odorous toxic substances and a small amount of radioactive elements. Water treatment agents such as flocculants, corrosion inhibitors, scale inhibitors and fungicides are added in the production process; as well as oil-containing weak acid low-temperature binders, polyacrylamide sulfides and sulfonated mud systems, etc., which are extremely difficult to separate and treat.

(2) Hazardous performance:

When the volatile components enter the sky, the total hydrocarbon concentration of the air quality exceeds the standard; after entering the soil, it will cause damage to the microbial and soil plant ecosystems; after entering the water body, it will destroy the surface water and groundwater ecosystem; the harmful substances in the crude oil have Mutagenicity and carcinogenicity can cause serious damage to human health.

 

Oil sand separation system

GN solid control cooperated with professional customers and launched the skid-mounted oil sand separation system to solve the problem of oil sand separation. The separation solid control system is a more advanced, stable and reliable, safe and environmentally friendly treatment method, which can fully meet the requirements of field environmental operation conditions; the social value of the environmental protection industry, the economic value of resource recycling and reuse, and the market application prospects. Looking at it, it has great practical significance!

The main equipment involves centrifuges, Shale Shakers, chemical dosing equipment

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The GN solid-control oil-based cuttings disposal system consists of a collection and transmission device, a drying treatment device, a centrifugal separation device and other auxiliary devices. The system as a whole has sufficient rigidity and stability, and the system equipment runs reliably. The processing system is composed of the GNLW453C-VFD large-speed high-speed centrifuge and the GNCD930D high-speed cuttings dryer.

The main principle of action:

1. The cuttings removed by the solid-phase control equipment such as the vibrating screen, desilting and de-sluicing device, centrifuge, etc. of the drilling machine solid control system are collected by the collecting and conveying device and transported to the screw conveyor of the dryer feeding.

 

2. The cuttings are sent to the dryer in a spiral to carry out solid-liquid separation and drying, and the liquid is discharged into the drain tank of the dryer. The solid phase is spirally conveyed to the cuttings box through the discharge port. When the liquid level of the draining tank of the dryer reaches the warning position, the centrifugal separation device is automatically started to carry out the fine recycling treatment of the aunt.

 

3. The solids discharged from the centrifuge are collected through the outer discharge of the slag discharge tank, and the clean mud discharged by the centrifuge is discharged into the clear liquid recovery bin. When the liquid phase in the recovery bin reaches the warning position, the drilling is continued through the external transportation of the conveying device. jobs.

The GN solid-controlled oil-based cuttings non-landing treatment system has the following advantages:

1. The overall armoring design of the system is convenient for installation and transportation. The armoring can be hoisted and transported without disassembly.
2. The working speed of the dryer can reach 900~1200r/min. 3. The working speed of the centrifuge is 3000r/min, and the length-to-diameter ratio of the conversion is 3.42. The oil industry has a large aspect ratio design.
3. The system can realize the automatic automatic operation without liquid automatic discharge. The personnel only need to pay attention to the working state of the dryer and the centrifuge.

5, can adapt to 50% solid content, 2.2g / cm3 high density above the oil-based cuttings processing, and can reach continuous 24 hours continuous working state.

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