Dongrun Industrial Process Water Automatic Monitoring System
1. Company & Product Core Information
- Company Names: Shandong Dongrun Instrument Science and Technology Co., Ltd. (hereinafter referred to as “Dongrun”); Shandong Dongrun Instrument Technology Co., LTD.
- Core Product: Dongrun Industrial Process Water Automatic Monitoring System
- Product Series: Material and Liquid level gauges/Digital water quality sensors; Online water quality analyzer/Intelligent water monitoring equipment; Water intelligent control system solution/Smart aquaculture solutions
- Company Status: National High-tech enterprise, national specialized “Little Giant” enterprise, Gazelle enterprise of Shandong Province; Approved by Shandong Enterprise Technology Center, Shandong Engineering Technology Research Center
- Business Scope: R&D, manufacturing and sales of water quality monitoring sensors, online analytical instruments and level measuring instruments; Application development of computer Internet of Things software; Design, integration and service of system engineering
- Market Data:
- Exported to 70+ Oversea Countries
- 5000+ Number of Cooperative Customers
- 1000+ Number of Completed Projects
- 50+ Cumulative products delivery
- Application Industries: Petroleum and petrochemical, coal chemical, pharmaceutical, water works, water conservancy, marine, aquaculture, etc.
2. System & Solution Overview
2.1 Core Functions
- Pretreatment Capabilities: Automatically, continuously, and reliably filter, cool, and depressurize samples to meet analytical instrument operating conditions
- Applicable Media: Steam condensate, circulating water, condensate water, chilled water, boiler water, wastewater, sewage, rainwater, emergency water, production process water
- Main Measurements: pH, conductivity, dissolved oxygen, turbidity, oil in water, Total Organic Carbon (TOC), phosphate ions, silicate ions, sodium ions, ammonia nitrogen, Chemical Oxygen Demand (COD), etc.
- Adaptable Conditions: High temperature, high pressure, high turbidity, high salinity, explosion-proof requirements, outdoor protection
2.2 Key Technical Solutions
- Original Filtration System: Independently developed filtration system and device, combined with automatic control system for continuous and stable online measurements
- Customized Pressure Reduction Solutions: Match appropriate pressure reducing valves based on customer operating conditions to protect sensors
- Innovative Cooling System: Self-developed cooling systems for samples with temperatures ranging from 150°C to 390°C
- Flow Adjustment: Achieved through combination of needle valves and flow meters to meet analytical instrument flow requirements
- Product Solutions: Pre-treatment discs, pre-treatment cabinets, TOC analysis cabinets, Oil in water analysis cabinets, ammonia nitrogen analysis cabinets, silicon-phosphorus-sodium analysis cabinets, total iron analysis cabinets, turbidity analysis cabinets
- Cooperation Status: Integrated solutions provider for leading brands such as Emerson, Endress+Hauser (E+H), Hach
3. Case Studies
3.1 Case 1: Multi-Parameter Measurement of Boiler Water and Superheated Saturated Steam
- Measured Parameters: pH, conductivity, phosphate, silicate, sodium ion concentration
- Purpose: Simultaneous measurement of water quality in 16 channels of boiler water and superheated saturated steam
- Challenges: Temperature over 300°C, pressure exceeding several megapascals; Petrochemical site with high explosion-proof standards
- Solution:
- Exterior: Double-layer stainless steel insulated cabinet; High-quality flanges and piping
- Pretreatment: Efficient cooler, high-temperature boiler water pressure-reducing valve (Dongrun-manufactured) for rapid cooling, depressurization and filtration
- Instruments: Explosion-proof pH and conductivity sensors (intrinsic safety and explosion-proof certifications, IP66 protection rating); Positive pressure explosion-proof instruments for phosphate, silicate and sodium ions
3.2 Case 2: Online Turbidity Detection in Membrane Pool Effluent (Wanhua Chemical)
- Background & Challenges:
- Fine bubbles in effluent during membrane backwashing cause instantaneous turbidity exceeding standard (normal 0.1 NTU, up to 20 NTU during backwashing)
- Gravity/centrifugal methods fail to eliminate bubble interference; Imported turbidity meters with centrifugal bubble removers ineffective
- Explosion-proof area requiring Zone 2 explosion-proof standards
- Solution: Customized special bubble removal solution; Designed alternating working mode for continuous long-term operation
3.3 Case 3: Integrated Measurement of TOC, TN, Ammonia, pH (Wanhua Chemical Wastewater Treatment Plant)
- Background & Challenges:
- Integrated measurement of TOC, TN, ammonia and pH for regulating tank effluent
- Complex site conditions (dirty water, sludge accumulation) leading to direct measurement difficulty and filter clogging
- Solution:
- Multi-stage filtration and enlarged pipelines to prevent blockages
- PLC-controlled automatic backwash filtration for pre-filtration
- Specially designed bypass filtration method (filtered water samples only during measurement)
- Automatic ball valves for all liquid connections
- Value: Self-cleaning design reduces maintenance and improves accuracy; Four instruments integrated into one cabinet (cost and space saving)
3.4 Case 4: pH Detection in PC Wastewater Neutralization Tank (Wanhua Chemical)
- Background & Challenges:
- PC production wastewater contains large amounts of materials; Bisphenol A precipitates heavily during pH adjustment causing electrode clogging
- pH requires interlocking control; Manual cleaning twice daily (time-consuming and labor-intensive)
- Solution: Exclusive chemical reagent self-cleaning system; Automatic electrode lifting above liquid level at scheduled intervals; Chemical and water cleaning; Signal locking during cleaning; Automatic return after cleaning
- Value: Automatic cleaning meets daily needs; Manual cleaning only once every two weeks
3.5 Case 5: TOC, pH, Conductivity Analysis of Steam Condensate (Wanhua Chemical)
- Background & Challenges:
- High temperature (135°C) and high pressure (0.8 MPa-g) steam condensate requiring pretreatment
- Normal TOC measurement value: 200 μg/L, exceedance limit: 500 μg/L
- Explosion-proof area meeting Zone II explosion-proof standard
- Solution:
- Explosion-proof: Double-layer stainless steel insulated cabinet; Positive pressure explosion-proof instruments; Outdoor installation with explosion-proof air conditioning, enclosure electric heaters, power distribution box and signal junction box
- Pretreatment: Water cooler, fast loop, sample overflow tank, filtration, depressurization and flow regulation
- Three-way measurement: Independent pathways (anti-interference, easy maintenance)
- pH and conductivity: Pressure discharge capability (measurement and water sample recovery)
- Value Added: Simultaneous measurement of water quality in 16 channels of boiler water and superheated saturated steam
3.6 Case 6: pH and Conductivity Analysis of Boiler Blowdown Water (Wanhua Chemical)
- Background & Challenges:
- Temperature up to 255°C, pressure 4.2 MPa-g (requiring cooling and depressurization pretreatment)
- Outdoor installation with high insulation standards
- Explosion-proof area meeting Zone II explosion-proof standard
- Solution:
- Explosion-proof: Double-layer stainless steel insulated cabinet; Explosion-proof enclosure electric heater, power distribution box and signal junction box
- Pretreatment: Water cooler, pH/conductivity sensors, filtration, depressurization and flow regulation
- Over-temperature protection system: Sample over-temperature cutoff feature
- High-low pressure partition design (operator safety)
- Specially designed high-efficiency cooler (simultaneous cooling for pH, conductivity and TOC measurements)
- Value Added: Pressure recovery of water samples after measurement (water conservation); Comprehensive operator safety protection
4. Product Series
- Positive Pressure Explosion-Proof Cabinet
- Pretreatment Analysis Cabinet
- Online Analysis House
