住友金属鉱山エンジニアリング List of Products and Services

IGBT (Insulated Gate Bipolar Transistor) is a power semiconductor device characterized by high-speed switching, which has recently been used in a wide range of fields from general households to industrial equipment as a replacement for thyristors for power regulation. Our company was the first in the country to adopt IGBT-based high-voltage power supply units in electric dust collectors, aiming to achieve energy savings (electricity) and reduce CO2 emissions.

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We offer a wet electrostatic precipitator that has a high dust and mist removal rate at high voltage, and can easily remove ultrafine particles such as fumes. Due to its cylindrical shape, it is robust and maintains its initial performance for a long time with minimal deformation over years of use. Additionally, because of the wide electrode gap, even when dust adheres and accumulates on the collection electrodes, there is little voltage drop, and performance does not degrade. 【Features】 ■ Wide electrode gap ■ Constant voltage control method adopted ■ Continuous cleaning method during charging ■ Equipped with a glow discharge extinguishing circuit (fire prevention) ■ Voltage control method that follows the concentration of inlet exhaust gas is available as an option (energy-saving) and more. *For more details, please download the PDF or feel free to contact us.

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High-voltage power supplies for electric dust collectors cannot be installed in areas where flammable gases are present due to the risk of explosion. It is necessary to install the high-voltage power supply far away from areas with flammable gases and lay Cottrell cables (paper insulated cables) to supply power to the electric dust collector. However, Cottrell cables have been discontinued for several years, and alternatives are being sought. Our product allows for the high-voltage power supply to be placed in a special pressure-resistant box, enabling installation near electric dust collectors in the presence of flammable gases, thus eliminating the need for laying Cottrell cables.

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Our company conducts the treatment of heavy metals and other substances based on non-ferrous metal smelting technology. We propose treatment methods tailored to individual wastewater circumstances, such as coexisting substances and required water quality. The target components include heavy metals, light metals, precious metals, metalloids, and semiconductors. 【Target Components (Partial)】 ■ Alkaline earth metals (Ca, Mg, etc.) ■ Rare earth elements ■ Cyanides ■ Organic matter (COD) ■ Oxidizers/reducers (hydrogen peroxide H2O2, residual chlorine, etc.) *For more details, please refer to the PDF materials or feel free to contact us.

• Water Treatment Plant

Our company has added a nitric acid reduction function to the cathode based on the N-Free A system. Nitric acid is reduced to ammonia at the cathode and reacts with the hypochlorous acid generated at the anode, undergoing oxidation treatment to nitrogen gas. When ammonia coexists in the raw water, both nitric acid and ammonia are treated simultaneously. 【Features】 ■ Capable of treating wastewater that cannot be processed by biological methods ■ No dilution required, high reaction speed, space-saving ■ No secondary waste (such as sludge) is generated ■ Can operate only when treatment is needed (continuous operation is not required) ■ No need to treat ammonia and nitric acid separately ■ Suitable for treating wastewater with high salt concentration (high electrical conductivity) *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment Plant

Our company measures BF4 concentration in real-time and optimizes the amount of BF4 decomposer based on the measurement values. In the case of batch reactions, the reaction time is approximately within 30 minutes. It can treat BF4- up to 10 mg/L, minimizing the use of BF4 decomposer. 【Features】 ■ In the case of batch reactions, the reaction time is approximately within 30 minutes ■ Can treat BF4- up to 10 mg/L ■ Minimizes the use of BF4 decomposer *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment Plant

Our company conducts fluoride treatment based on a method that removes fluoride as calcium fluoride by adding calcium salts to precipitate it. After the removal of calcium fluoride, a defluorinating agent is added to the supernatant to generate calcium precipitate, which adsorbs and removes fluoride. The generated calcium precipitate is reused as a calcium source in the process of precipitating calcium fluoride. Therefore, sludge derived from additives does not occur. 【Features】 ■ The treated liquid contains almost no calcium. ■ No precipitate other than calcium fluoride is generated. ■ Existing equipment can be repurposed. *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment Plant

In our company, to reduce the presence ratio of ammonia nitrogen, we incorporate an ammonia stripping process to selectively remove ammonia and perform anaerobic digestion liquid treatment. To introduce ammonia stripping, we first separate SS to prevent clogging in the ammonia stripping process and to remove solid COD components, thereby reducing COD load. The COD components remaining after ammonia stripping are treated by combining biological treatment and chemical treatment. 【Features】 ■ By incorporating ammonia stripping, the C/N ratio is improved. ■ Since the nitrogen concentration is reduced at the ammonia stripping outlet, the risk of nitrate accumulation in subsequent treatment is low. *For more details, please refer to the PDF document or feel free to contact us.

• Water Treatment Plant

Our company conducts primary treatment through biological treatment methods or coagulation and sedimentation after necessary pretreatment for high concentration and high load COD processing, followed by chemical oxidation treatment on the effluent. We reduce the pollution load within the range that can be treated with biological treatment, which has low running costs, thereby controlling the total running costs. In cases where it is possible to generate poorly soluble organic matter, coagulation and sedimentation may be used instead of biological treatment. 【Features】 ■ Chemical treatment is performed in the later stage to reduce COD concentration to meet discharge standards. ■ Finishing is done with chemical treatment, which is expected to provide stable operation compared to biological treatment. ■ Suitable for wastewater that is difficult to meet discharge standards with biological treatment alone or wastewater that does not operate stably with biological treatment. ■ In the event of temporary trouble with biological treatment, treatment is carried out solely with chemical treatment to cover until the biological treatment is restored. *For more details, please refer to the PDF materials or feel free to contact us.

• Water Treatment Plant

Our company performs harmless treatment of ammonia nitrogen and COD components using this device (electrolytic device). For ammonia, it reacts with hypochlorous acid generated at the anode and is oxidized to nitrogen gas. Since hypochlorous acid is generated within this device, there is a cost advantage compared to purchasing it. 【Advantages】 ■ Capable of treating wastewater that cannot be processed by biological methods - No restrictions on the nitrogen concentration of the raw water (can treat high concentrations directly) - Can accommodate fluctuations in the nitrogen concentration of the raw water ■ No dilution is required, and the high reaction speed saves space ■ No secondary waste (such as sludge) is generated ■ Can operate only when treatment is needed (continuous operation is not required) *For more details, please refer to the PDF materials or feel free to contact us.

• Water Treatment

Our company provides treatment for nitrate nitrogen that can handle wastewater that cannot be processed by biological methods. Wastewater that cannot be treated by biological methods can also be addressed. No dilution is required, and due to the high reaction speed, it is space-saving, and secondary waste (such as sludge) is not generated. 【Application Cases / Consideration Cases (Excerpt)】 ■ Acid washing wastewater treatment ■ Scrubber wastewater treatment ■ Semiconductor material cleaning wastewater treatment ■ Combined treatment with acid recovery ■ Nuclear-related facility wastewater treatment *For more details, please refer to the PDF document or feel free to contact us.

• Water treatment technology and systems

The "Free Series" is a self-developed chemical treatment process that improves the issues of conventional methods for the treatment of nitrogen, COD, fluorine, etc., aimed at water recovery, recycling, and regulatory compliance. It can be applied to wastewater from various processes such as metal pickling, metal surface treatment, semiconductor manufacturing processes, plating processes, catalyst manufacturing processes, and precious metal manufacturing processes. We propose appropriate solutions by combining the characteristic element technologies of the "Free Series" with metal separation and purification technologies. 【Element Technologies】 ■ Nitrate Nitrogen Treatment N-Free N ■ Ammoniacal Nitrogen/COD Treatment N-Free A ■ Fluorine Treatment F-Free ■ Boron Fluoride Treatment B-Free F ■ Nitrate/Ammonia Electrolytic Treatment N-Free AN ■ Heavy Metal Treatment, etc. *For more details, please download the PDF or feel free to contact us.

• Water Treatment Plant

We offer a wet electrostatic precipitator that has a high dust and mist removal rate at high voltage, and can easily remove ultrafine particles such as fumes. Due to its rectangular cylindrical shape, it is sturdy and maintains its shape over many years of use, allowing for the initial performance to be sustained for a long time. Additionally, because of the wide electrode gap, even when dust adheres and accumulates on the collection electrodes, there is minimal voltage drop, and performance does not degrade. 【Features】 ■ Wide electrode gap ■ Constant voltage control method adopted ■ Continuous cleaning method during charging adopted ■ Equipped with glow discharge extinguishing circuit (fire prevention) ■ Voltage control method that follows the concentration of exhaust gas at the inlet available as an option (energy-saving) and more *For more details, please download the PDF or feel free to contact us.

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Our company manufactures a mercury adsorbent that efficiently adsorbs and removes gaseous mercury from exhaust gases. In addition to conventional lead sulfide, we have developed an adsorbent that uses copper sulfide as an adsorbing component for practical use. With an adsorbent thickness of 1500mm and a gas flow rate in the tower of approximately 0.2m/s, it is possible to expect a removal rate of about 95% to 98%. Moreover, unlike activated carbon, the removal rate does not decrease in the presence of moisture in the gas, and we have a proven track record of long lifespan, ranging from several years to about 10 years, even in the presence of sulfur dioxide (SO2) gas. 【Features】 ■ High removal efficiency ■ Low pressure loss ■ Long lifespan ■ Contains almost no Pb (lead) in the adsorbent *For more details, please download the PDF or feel free to contact us.

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