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    Technical advantages of WESP

    Technical advantages of WESP

    No. Category Items Solutions adopted Results
    1 Technical values Emission standard Particle content＜10mg/Nm³ Meet with the strict requirements on environmental protection from the customers
    2 Efficient electrostatic absorption area ≥1250㎡/100,000m³ flue gas Sufficient absorption surface brings excellent de-dust result.
    3 Operation power of WESP 60kw for each 100,000m³ of flue gas Crude gas sprinkling cooling in duct + scrubber washing, the dust concentration before entering the electrostatic is as low as possible, and at the same time reduce the load of high-voltage electrostatic system and the overall operating power.
    4 anode plate + low wind speed inside WESP adopted plate type anode structure to decrease pressure loss of the system, the overall pressure loss3≤00pa, wind velocity is 0.95m/s. Plate type configuration has a smaller pressure loss, which is 40% lower when compare to honey comb configuration, so as to reduce the operation power of dryer fan, the operation cost is reduced, and more system ability is kept for dryer. Furthermore, plate type is easier for flushing away the particles attached on plates, no need manual flushing that required workers to go inside the WESP.
    5 Manufacturing technology Wet electrostatic precipitator Designed and manufactured in modules, bolts joint assembly on site. Reduced the job site work utmost, assure the system’s integration and performance;
    6 Selection of materials Stainless steel 304 and higher-grade materials are applied for all parts that in contact with water and gas, Duplex stainless steel 2205 is applied for the parts that subject to high voltage, so as to avoid electrochemical corrosion and pitting problem. There are chloride, acid and such corrosive elements in tail gas and recycled water, the selection of suitable materials assures the system operation lifetime up to 15 years.
    7 Treatment of materials All stainless steels are subject to acid washing and passivation treatment, so as to highly enhance their corrosion resistance and lifetime. Acid washing and passivation treatment, so as to highly enhance their corrosion resistance and lifetime.
    8 Highly integrated system configuration This unit has been highly integrated configured, for site work, only a concrete foundation needs to be built for this unit, since the circulation water tank is made of stainless steel, so no need extra water pond and so on civil works. The unit has a neat appearance and easy to maintain clean
      9 Outsourced standard components Mechanical components Water pumps select Grundfos and Xylem, motors select Siemens, ABB and the equivalents. First class equipment assures the system‚Äö√Ñ√¥s stable operation and saves the energy.
    10 Sensors Products with well-known brands are selected. Assures true and stable data feedback.
    11 Electrical control system The electrical components adopt the global top brands such as Siemens, ABB and Schneider. Assures the system’s stable and reliable operation.
    12 High voltage power supply 2-stage modes are available for option, stage 1 and stage 2. 2-stage WESP is a patent technology belongs to 7mg Co., Ltd. This technology achieves a super-low emission of no more than 5mg, in the meanwhile, it brings excellent treatment result on organics such as Vocs and etc.
    13 Water recycle device Rotation screen filter + 2 stages water tank sedimentation + scraper fine filter A stable running of water recycling system is very critical to the whole WESP’s operation, so the machines with patent technology can assure its continuous and stable operation.
    14 Safety measures Elimination of safety hazards Equipped with electrostatic field spark detection system, to ensure clean and perfect program control of electrostatic field (multi-point automatic switch), mechanical interlocking system to ensure personal safety. Since the anode is designed as big and wide plate configuration, so it is easy to flush away the dust attached onto the surface, and no clogging problem happened to WESP. And, a clean electrostatic field can avoid potential risk of fire and explosion that caused by huge volume of dust accumulation in electrostatic field. Multi-point temperature sensor interlock, back flush filter, electrostatic field spark detection system, to ensure clean and perfect program control of electrostatic field, multi-point automatic switch, mechanical interlocking system to ensure personal safety.
    15 Effective contingency plan Equipped with automatic sprinkling system, PLC plus UPS power, to maintain the operation in case of power failure. Provides corresponding treatment plan for possible external anomalies.
    16 Automatic adjustment of PH value An in-line PH testing device is installed for monitoring, and adjust PH value by dosing of alkaline solution Alkaline solution is added for improving the recycling water quality and extend the system’s lifetime.
    17 Heat recovery The recovery of the residual heat in tail gas, and the recovered heat can be used for hot water in the factory, heating in the factory building, and depluming and etc.
    18 Operation cost Operation cost: 50 US cents for per cubic meter finished board, on the basis of, electricity price is 10 US cents per kwh, and not count in the depreciation of this unit.