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The electrostatic precipitator for tail gas treatment in the cyanuric acid industry is shipped to Shandong. The attached picture shows the shipping site.
Shipment of Wet Electrostatic Precipitator for Tail Gas Treatment in the Cyanuric Acid Industry
Delivery of the shell of the wet electrostatic precipitator for tail gas treatment in the cyanuric acid industry
Stepping into the garden-style green factory of the Guizhou customer, four sets of wet electrostatic precipitator equipment designed and manufactured by Hebei Weimei Environmental Protection for phosphochemical tail gas treatment are operating stably here.
There are four sets of wet electrostatic precipitator equipment for phosphorus chemical tail gas treatment. On the left are two electrostatic precipitator with a capacity of 250,000 m ³ /h and a gas volume of 2. On the right is one wet electrostatic precipitator with a capacity of 500,000 m ³ /h and a desulfurization system. On the south is one electrostatic precipitator with a capacity of 50,000 m ³ /h.
500,000 m ³ /h gas volume:
A certain phosphorus industry company in Guizhou Province carried out deep desulfurization treatment on the terminal flue gas. The desulfurization transformation flue gas volume was 500,000 m ³ /h, with the outlet concentration required to be less than 100mg/Nm3, and the particulate matter less than 75mg/Nm3. The wet electrostatic demister treated the flue gas into desulfurized flue gas and water vapor. The flue gas contained strong corrosive media such as sulfur, phosphorus, arsenic, and fluorine. The working humidity is below 90 degrees Celsius and the working pressure is within 5000KPa.
250,000 m ³ /h gas volume:
Phase II Project of Technical Transformation for Clean Production of Yellow Phosphorus. The gas handling capacity of this electric demister is 250,000 m³/h, with the flue gas temperature below 85°C. The air inlet and outlet of the demister are arranged in a bottom-in and top-out manner. After the equipment is completed, the weight of the steel frame ladder platform of a single unit is approximately 98 tons, the weight of internal components and insulation system of the equipment is approximately 102 tons, and the total weight of a single unit is approximately 200 tons (excluding the inlet and outlet flues).
Hebei Weimei Environmental Protection focuses on the field of in-depth flue gas pollution treatment, and is committed to the manufacturing and maintenance services of complete sets of equipment such as wet electrostatic precipitators, electrostatic demisters, desulfurization and dust removal systems, as well as accessories for dust and mist removal systems.
The insulation temperature-controlled box of wet electrostatic precipitators can adopt two methods—electric heating and hot air purging—to ensure the insulation performance of the insulator chamber. The electric heating method is widely used due to its extremely low or zero air leakage rate; especially for systems with low SO? concentration, this method is the only available option. The hot air purging method is suitable for occasions with high SO? concentration and sufficient surplus capacity.
316L Stainless Steel Insulation Box for wet electrostatic precipitators
The insulation box plays the role of insulating the high-voltage electric field from the equipment; it maintains a certain temperature to prevent the condensation of moisture in the flue gas on the porcelain bushing at low temperatures, which would otherwise cause flashover.
Hebei Weimei Insulation Box for Wet Electrostatic Precipitator
Insulation Box of Wet Electrostatic Precipitator in Operation for the Phosphorus Chemical Industry Waste Gas Treatment Project
In the actual operation of a wet electrostatic precipitator (WESP), the cathode wires operate in a harsh working environment. If the electrode wires break, it may cause electrode short-circuiting, which in turn forces the entire electric field to shut down and lose its dust removal capability. According to the on-site gas conditions, we will select the corresponding cathode wires, among which the most commonly used ones are lead electrode wires and 2205 stainless steel cathode wires.
Causes and Solutions for Severe Corrosion and Fracture of Cathode Wires in Wet Electrostatic Precipitators
The following phenomena will occur when cathode wires break:
Causes for Cathode Wire Fracture in Wet Electrostatic Precipitators:
Solutions for Cathode Wire Fracture in Wet Electrostatic Precipitators:
Hebei Weimei Environmental Protection Co., Ltd. is a manufacturer specializing in the design and production of wet electrostatic precipitators and flue gas desulfurization equipment. We also undertake maintenance and renovation projects for wet electrostatic precipitators and flue gas desulfurization equipment. Inquiries are welcome.
Wet desulfurization construction site using limestone/gypsum method
Wet desulfurization construction site using limestone/gypsum method
Hubei Wet Desulfurization Construction Site
The flue gas of this wet electrostatic precipitator consists of desulfurized flue gas and water vapor from yellow phosphorus quenching slag, and the flue gas contains highly corrosive media such as sulfur, phosphorus, arsenic, and fluorine.
yellow phosphorus quenched slag water vapor wet electrostatic precipitator operating up to standard
The body and inner wall of this wet electrostatic precipitator must meet the anti-corrosion requirements in a strong acid environment. The anode tube material is a conductive fiberglass reinforced plastic anode tube with a wall thickness of no less than 3mm. The resin should be vinyl ester flame-retardant resin, and the inner surface should be smooth, clean and easy to clean. The resistance of each anode tube is less than 100Ω. The cathode wire material is 2205 duplex steel, and the design flow rate is ≤0.82m/s.
The flue gas treated by this wet electrostatic precipitator is the desulfurized flue gas and the water vapor from yellow phosphorus quenching slag. The flue gas contains highly corrosive media such as sulfur, phosphorus, arsenic, and fluorine. The flue gas volume is 200,000 m³/h, the flue gas temperature is ≤ 90°C, and the designed flow rate of the wet electrostatic precipitator is ≤ 0.82 m/s. It is required that the wet electrostatic precipitator should basically have no emission of blue flue gas and white flue gas in the high-temperature environment in summer; in the low ambient temperature environment in winter, there should be no obvious emission of blue flue gas, and the trailing of white flue gas should be controlled within 20 meters.
The wet electrostatic precipitator designed and manufactured by Hebei Weimei Environmental Protection Equipment Technology Co., Ltd. is used to treat hypophosphite reaction tail gas with a gas volume of 40,000 m³/h. For this equipment, components including the lower air chamber, ash accumulation chamber, upper air chamber, stainless steel anode tube, internal spray pipe, and air distribution plate are made of 316L stainless steel. The thickness of the air chamber is 4 mm, and the external reinforcing plate of the air chamber is made of 304 stainless steel. The thickness of the anode tube is 1.5 mm.
This electrostatic precipitator is equipped with a PLC automatic control system, which automatically monitors the operating conditions, adjusts the current, triggers automatic alarms and interlocks, and controls spraying and cleaning processes automatically according to working conditions. Meanwhile, the PLC system is reserved with communication interfaces, and all data can be uploaded to the DCS system, enabling automatic control via the Party A’s central control room DCS system.
Operation Performance Requirements
The hypophosphite reaction tail gas contains phosphoric acid mist. Appropriate measures shall be taken to ensure effective isolation between the hypophosphite reaction tail gas and the insulating porcelain bottles.
This wet electrostatic precipitator is a 25,000 m³/h wet electrostatic precipitator (demister) designed for feed-grade calcium production tail gas. The flue gas is mainly composed of water vapor, SO?, SO? and NO?. The shell is made of full fiberglass reinforced plastic (FRP), with a required thickness of ≥ 8 mm. The anode tubes adopt flame-retardant conductive fiberglass reinforced plastic, with an oxygen index of ≥ 32.
The designed gas velocity of this wet electrostatic precipitator is 1 m/s. The operational performance requirements of the wet electrostatic precipitator are as follows:
Hebei Weimei Environmental Protection Equipment Technology Co., Ltd. has commenced the shipment of the wet electrostatic precipitator designed for the deep purification of calcium chloride drying flue gas in the chemical industry. This equipment is engineered to treat a flue gas volume of 179,000 Nm³/h, with an inlet dust concentration of 200 mg/m³ and a flue gas temperature below 50℃. The designed gas velocity of this high-voltage electrostatic wet precipitator is 1.1 m/s, and its air inlet and outlet are configured in a bottom-in and top-out mode. The equipment is required to ensure that the outlet dust concentration is below 20 mg/m³, with no particulate trailing after water mist removal.
Below are the on-site shipment photos.
Shipment of Wet Electrostatic Precipitator for Calcium Chloride Drying Flue Gas in the Chemical Industry
Anode System of Wet Electrostatic Precipitator
Shipment of Anode Modules for Wet Electrostatic Precipitators
The waste gas generated during the production of phosphorus chemical industry mainly includes carbon monoxide, sulfur dioxide, carbon dioxide, hydrogen fluoride, silicon tetrafluoride, phosphine, hydrogen sulfide, etc., along with some dust. Carbon monoxide (CO) is a colorless, odorless, flammable and toxic gas, and yellow phosphorus tail gas is the main source of CO. Therefore, it is an urgent and critical moment to prevent global warming caused by carbon dioxide (CO?) gas. Sulfur dioxide (SO?) is a colorless, slightly odorous and suffocating gas, and also one of the main substances causing air pollution.
Weng'an is hailed as the "Phosphorus Warehouse of Asia" due to its abundant phosphate rock resources. Endowed with rich mineral resources to fuel economic development, Weng'an County has always adhered to the two bottom lines of development and ecology to promote the transformation and upgrading of the phosphorus chemical industry. It has continuously taken new-type industrialization as the main direction for the high-quality economic development of Weng'an, firmly established and practiced the concept that "lucid waters and lush mountains are invaluable assets", and unswervingly taken the path of industrial ecologization and ecological industrialization. It is against this background that Weimei Environmental Protection has the opportunity to participate in a series of production technology upgrading and transformation projects of Longma Phosphorus Industry.
Clean Production Technology Renovation Project of Yellow Phosphorus of Weng'an Longma Phosphorus Industry Co., Ltd.
The gas handling capacity of each of the two wet electrostatic precipitators is 250,000 m³/h, and the flue gas temperature is below 85℃. The inlet and outlet of the demister are arranged in a bottom-in and top-out mode. After the equipment is constructed, the weight of the steel frame, access ladder and platform of a single unit is about 98 tons, the weight of internal components and insulation system is about 102 tons, and the total weight of a single unit is about 200 tons (excluding the inlet and outlet flues).
Project of Yellow Phosphorus Waste Gas Treatment with Wet Electrostatic Precipitator for 250,000 m³/h Gas Volume in Guizhou
Wet Electrostatic Precipitator for Deep Desulfurization of Terminal Flue Gas from Yellow Phosphorus Tail Gas with 500,000 m³/h Gas Volume
Longma Phosphorus Industry carries out deep desulfurization treatment on terminal flue gas. The gas volume of the flue gas undergoing desulfurization renovation is 500,000 m³/h, with the required outlet concentration of sulfur dioxide less than 100 mg/Nm³ and particulate matter less than 75 mg/Nm³. Medium of the desulfurized flue gas: the flue gas is generated from the combustion of yellow phosphorus tail gas (mainly CO), containing highly corrosive media such as sulfur, phosphorus, arsenic and fluorine. The temperature of flue gas entering the desulfurization tower is ≤ 120℃.
Project of Wet Electrostatic Precipitator for Wet Desulfurization of Terminal Flue Gas
The wet electrostatic precipitator on the left has been operating stably for more than two years, while the one on the right is the newly commissioned wet electrostatic precipitator for deep desulfurization of terminal flue gas from yellow phosphorus tail gas with 500,000 m³/h gas volume.
The entire wet electrostatic precipitator system is equipped with a PLC automatic control system, which automatically controls spraying and cleaning. Meanwhile, the PLC system reserves communication interfaces, and all data are uploaded to the DCS system, enabling automatic control from the central control room to the DCS system. The flue gas treated by the wet electrostatic demister is the desulfurized flue gas mixed with water vapor, containing highly corrosive media such as sulfur, phosphorus, arsenic and fluorine. The operating temperature is ≤ 90℃, and the operating pressure is ≤ 5,000 KPa.
Clean Production Technology Renovation Project of Yellow Phosphorus of Weng'an Longma Phosphorus Industry Co., Ltd.
Baghouse Dust Collector for the Flue Gas Pre-treatment Unit of the 100 t/h High-temperature & High-pressure Gas-fired Boiler (540℃, 9.8 MPa) Fueled by Yellow Phosphorus Tail Gas
This unit adopts sodium carbonate (Na?CO?) as the flue gas treatment agent, and employs a baghouse dust collector for mist removal. The flue gas pre-treatment unit consists of four parts: a raw material silo, a feeding system, a mixing and drying system, and a baghouse mist eliminator. The flue gas in this project has high contents of sulfur, phosphorus and other acidic substances, so the flue gas pre-treatment unit must fully consider the corrosion caused by sulfur, phosphorus and other acidic substances. All flues in the flue gas pre-treatment unit are made of materials not lower than 2205 duplex stainless steel and 316L stainless steel.
Stable Operation of the Baghouse Dust Collector (1,760 Bags) for the Comprehensive Utilization & Pre-treatment Unit of Yellow Phosphorus Tail Gas
The flue gas pre-treatment unit is composed of four parts: a raw material silo, a feeding system, a mixing and drying system, and a baghouse dust collector .
The yellow phosphorus tail gas is treated by a coal gas purification filter and then enters a gas holder. After being purified by a desulfurization device, it is fed into the 100 t/h boiler of the yellow phosphorus tail gas power generation system for combustion. The exhaust gas generated by combustion is treated through the process of flue gas pre-treatment unit + baghouse dust collector + “wet desulfurization + wet electrostatic precipitator”. SO?, NO? and particulate matter can meet the emission standards, and are finally discharged through the existing 50-meter-high exhaust stack.
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