Empowering Electric Desalting Wastewater Treatment: Automatic Control Unlocks a New Paradigm of Efficiency and Environmental Performance
In petrochemical, coal chemical and oilfield production industries, electric desalting wastewater treatment is a core step for safeguarding production safety, improving product quality and meeting environmental requirements. Conventionalelectric desalting wastewater treatmentprocesses rely heavily on manual operation. They not only suffer from low treatment efficiency, poor effluent stability and persistently high energy consumption, but also involve large manual intervention errors and pronounced safety hazards, making it difficult to meet the demands of modern high-quality industrial development.
As an industry technology benchmark, Shenzhen SINOKLE has worked deeply in the field of electric desaltingwastewater treatmentand innovatively introduced a“high-efficiency coalescing oil remover+cyclonic dissolved air flotation”combined process package, paired with a full-process intelligent automatic control system. By deeply integrating physical separation technology with intelligent control, it fundamentally breaks through the bottlenecks of conventional processes, providing the industry with an efficient, energy-saving, safe and stable electric desaltingwastewater treatmentsolution that turns the core treatment step into an“unattended, precisely controllable, highly efficient and energy-saving”.
Understand the Process First: SINOKLE's Core Combined Process Lays the Foundation for Automatic Control
The core competitiveness of Shenzhen SINOKLE's electric desaltingwastewater treatmentunit begins with its efficient and reliable combined process.——The high-efficiency coalescing oil remover works in coordinated linkage with cyclonic dissolved air flotation (CDFU), adopting purely physical separation technology with no chemical agents added, eliminating secondary pollution at the source while providing process support for the precise implementation of automatic control.
As the core of pre-treatment, the high-efficiency coalescing oil remover is fitted with SINOKLE's patented super-hydrophilic modified packing. With the help ofCFDa simulation-optimised flow field design, oily wastewater enters the unit tangentially, first removing dispersed oil through cyclonic pre-separation and then capturing oil droplets as small as0.1μmthrough the enormous specific surface area of the packing, causing droplets to collide, coalesce and grow, and finally completing stratified separation by the oil-water density difference. Single-stage oil removal efficiency reaches90%or more, clearing the way for subsequent advanced treatment. The unit operates fully enclosed and under pressure, and is equipped with an automatic sand flushing system that effectively prevents sediment accumulation and ensures long-term stable operation.
Cyclonic dissolved air flotation (CDFU) then takes on the task of advanced purification, integrating cyclonic centrifugal separation with ultra-fine bubble flotation technology. Through a multi-stage cyclonic dissolved air pump it generates5-30μmuniform ultra-fine bubbles, greatly improving the collision and adhesion efficiency between oil droplets and bubbles. After the oily wastewater mixes with dissolved air water it enters the cyclonic flotation tank, where centrifugal force and bubble buoyancy act together to make emulsified oil droplets rapidly float to the surface and form scum, while clear water is discharged from the bottom. Single-stage oil removal efficiency far exceeds that of conventional dissolved air flotation (DAF), and it is especially adept at handling difficult emulsified oily wastewater.
It is precisely this dual physical separation architecture of“pre-treatment+advanced purification”with a clear flow scheme and controllable parameters that enables the automatic control system to accurately capture the operating status of every process node, achieving full-process closed-loop management and control, avoiding the parameter fluctuations caused by adding chemical agents, and making intelligent control more feasible and stable.
Core Highlight: Full-Process Automatic Control Unlocks an Electric Desalting Dehydration“Intelligent Mode”
Shenzhen SINOKLE's automatic control system is built aroundPLCas its core, combined with high-precision sensors, intelligent actuators and a remote monitoring platform, covering the full process from“influentpre-treatmentadvanced purificationeffluentsludgecrude oil recovery”It achieves integrated management and control of real-time monitoring of process parameters, intelligent adjustment, fault warning and data traceability, completely removing dependence on manual operation and greatly improving treatment performance and operational stability.
1. Real-Time Monitoring: Precisely Capture Every Process Parameter and Eliminate“Blind Operation”
The core prerequisite of an automatic control system is“precise perception”. SINOKLE has equipped key nodes throughout the unit with high-precision sensors to achieve real-time acquisition and synchronous transmission of multiple parameters, providing data support for intelligent adjustment:
At the influent end, parameters such as wastewater flow rate, oil content, temperature, pressure and conductivity are monitored in real time. Once flow fluctuations (10%-120%the fluctuation range is adaptable), a sudden rise in oil content or other abnormal conditions occur, the system immediately triggers a warning and automatically adjusts subsequent process parameters, preventing shock loads from affecting treatment performance. Inside the high-efficiency coalescing oil remover, a level sensor monitors the oil-water interface height in real time, preventing the oil phase from mixing into the clear water outlet or the water phase from remaining in the oil phase, ensuring stable separation. Inside the cyclonic dissolved air flotation tank, parameters such as bubble size, dissolved air pressure and liquid level are monitored to give real-time feedback on flotation performance and provide a basis for adjusting bubble size. At the effluent end, indicators such as oil content and suspended solids concentration are monitored to ensure the effluent meets discharge standards, while also enabling real-time data recording and traceability.
All monitoring data is displayed in real time on the central control panel and the remote monitoring platform, so managers can intuitively grasp the operating status of the entire unit without on-site inspection node by node, greatly reducing manual labour intensity.
2. Intelligent Adjustment: Dynamically Adapt to Changing Conditions and Achieve“Precise Performance Control”
Based on the real-time monitoring data, the automatic control system usesPLClogic operations to dynamically and intelligently adjust each process stage, ensuring the entire unit always operates in its optimal state while balancing treatment performance and energy-saving needs:
At the high-efficiency coalescing oil remover stage, the system automatically adjusts the influent valve opening according to influent flow and oil content, optimising water velocity to ensure oil droplets have sufficient coalescence time. At the same time, based on the oil-water interface height, it automatically controls the opening and closing of the oil discharge valve and drain valve, avoiding the lag and error of manual adjustment and ensuring stable separation efficiency.
At the cyclonic dissolved air flotation stage, the system automatically adjusts dissolved air pressure and dissolved air water volume according to the degree of emulsification in the influent and the oil content in the effluent.——When the emulsified oil content in the influent is relatively high, it automatically increases dissolved air pressure and produces more ultra-fine bubbles, improving adsorption and separation. When the surface scum reaches a set thickness, it automaticallyadjusts the liquid levelto prevent scum accumulation from affecting flotation efficiency. When operating conditions are stable, it automatically adjusts parameters to an energy-saving mode to reduce consumption.
In addition, the system achieves coordinated linkage between the two core units: when the oil content in the effluent of the high-efficiency coalescing oil remover fluctuates slightly, the cyclonic dissolved air flotation system automatically adjusts its operating parameters to promptly compensate for the treatment deviation, ensuring the final effluent meets standards and forming a“pre-treatmentadvanced purification”seamless coordinated control loop.
3. Fault Warning and+Automatic Handling: Preventing Problems Before They Occur and Ensuring“Safe and Continuous Operation”
Electric desaltingwastewater treatmentContinuous and stable operation of the unit is directly related to downstream production safety and environmental compliance. SINOKLE's automatic control system has a built-in comprehensive fault warning and automatic handling mechanism that nips safety hazards in the bud:
The system presets thresholds for various faults. When abnormal parameters are detected (such as excessive pressure, over-limit liquid level, motor overload or non-compliant effluent), it immediately triggers an audible and visual warning and pushes the warning information to managers' mobile phones and computers, specifying the fault location, fault type and emergency handling recommendations. For minor faults, the system automatically starts the emergency handling procedure.——For example, when the dissolved air pump pressure is abnormal, it automatically adjusts the pump operating frequency, and if adjustment is ineffective it automatically switches to a standby pump, ensuring the unit does not stop operating. For major faults, the system automatically shuts down and isolates the relevant piping to prevent the accident from escalating and to safeguard equipment and personnel safety.
At the same time, the system automatically records the fault occurrence time, cause, handling process and recovery status, forming a complete fault archive that provides data support for subsequent equipment maintenance and process optimisation, reducing equipment failure rates and maintenance costs.
4. Remote Management and+Unattended Operation: Simplifying Management and Improving“Operational Efficiency”
SINOKLE's automatic control system supports remote monitoring and operation. Managers do not need to be on site; through a computer or mobile phoneAPPthey can achieve remote management of the entire unit: viewing operating parameters in real time, starting and stopping equipment, adjusting process parameters, receiving fault warnings and reviewing operating reports, truly achieving“unattended operation with remote controllability”.
For skid-mounted units (with a footprint of only1/3of conventional equipment), the advantages of remote management are even more pronounced.——Whether on an offshore platform, a remote oilfield or a land-scarce refinery site, managers can remotely control the operating status of the unit, greatly reducing on-site staffing and labour costs while avoiding the safety risks of on-site inspection. In addition, the system automatically generates operating reports (daily, weekly and monthly), compiling key data such as treated water volume, oil removal efficiency and energy consumption, without manual statistics, providing precise data support for corporate operational decisions.
Proven in Practice: Case Studies Demonstrate Strength and the Value of Automatic Control
However good a technology is, it must ultimately stand the test of practice. Shenzhen SINOKLE's electric desaltingwastewater treatmentautomatic control units have already been deployed in a number of large petrochemical and oilfield projects, demonstrating the core value of intelligent control with solid results:
In the electric desalting wastewater treatment project of Sinopec Cangzhou Branch, SINOKLE's“high-efficiency coalescing oil remover+cyclonic dissolved air flotation”process paired with an automatic control system was adopted, with a treatment capacity of50m³/hand an inlet oil content of≤20000ppm. After the entire system was put into operation, it achieved full-process unattended operation, automatically adapting to fluctuations in influent water quality, with effluent oil content stably maintained below100mg/L, oil removal efficiency above95%, completely solving the problem of emulsified oil carryover in conventional processes, reducing annual labour costs by about20ten thousand yuan, while recovering high-quality crude oil for secondary use and creating additional economic benefits.
In the PetroChina Sichuan Petrochemical project, the treatment scale is70m³/h, with average inlet wastewater oil content of10%and a maximum shock load of40%. Relying on its strong shock resistance and precise adjustment capability, SINOKLE's automatic control system automatically adjusts process parameters to ensure effluent oil content of≤150ppm(average about50ppm). The equipment has operated continuously and stably for many years without major failures, greatly reducing equipment maintenance costs and environmental compliance risks.
In addition, the system is also widely used in offshore platforms, tank farm water draining and other scenarios. With its compact skid-mounted design and intelligent control capability, it adapts to harsh conditions with limited space and large water quality fluctuations, earning consistent recognition from industry customers.
Empowering the Industry: Automatic Control Leads Electric DesaltingWastewater TreatmentToward a Green Upgrade
As environmental requirements continue to tighten and pressure to save energy and reduce emissions grows, electric desaltingwastewater treatmentis moving toward“higher efficiency, energy saving, intelligence and green development”. Shenzhen SINOKLE deeply integrates efficient physical separation processes with intelligent automatic control, not only solving the pain points of conventional processes but also achieving a dual improvement in“environmental+and economic benefits”:
On the environmental side, the purely physical process requires no chemical agents, avoiding the generation of oily sludge (hazardous waste), and the effluent meets discharge standards, helping enterprises achieve green and low-carbon development. On the economic side, automatic control greatly reduces labour costs and energy consumption, and the recovered high-quality crude oil can be directly refined, creating additional economic benefits for the enterprise.——500Taking a refinery with a 10 million tonne refining capacity as an example, an average of864tonnes of crude oil can be recovered annually, creating economic benefits of over ten million yuan. On the safety side, fully enclosed pressurised operation plus+automatic fault warning completely eliminates the safety hazards of exhaust gas leakage and manual operation, safeguarding production safety.
