日新技研 List of Products and Services

We will introduce examples of solutions to problems with dust collectors (wet and dry types). When the internal filter of the electric dust collector for oil vapor recovery became clogged, the collection efficiency drastically decreased, leading to complaints from nearby residents due to the leaked exhaust gas. To address this, we made improvements to the exhaust gas inflow section of the wet dust collector, increased the particle size of the material being processed, and enhanced the collection capacity of the wet dust collector. After the installation of the equipment, the exhaust gas became clean, and complaints from nearby residents ceased. Additionally, we have resolved issues with dry dust collectors, such as early filter wear due to abrasive dust inflow, leading to dust leakage. [Case Studies] < Dust Collector (Wet) > ■ Exhaust after washing exhaust gas containing film gloss wax components < Dust Collector (Dry) > ■ Effective use of plastic bags installed inside the dust collection drum after dust collection ■ Improvement of dust leakage due to early filter wear ■ Issue of uneven dust accumulation in the dust hopper at the bottom of the dust collector *For more details, please feel free to contact us.

The tack labels for the collected items have adhesive on one side, making air transport difficult, and there was a problem with the adhesive strength of the tack labels varying by product. Therefore, by applying a non-adhesive treatment to various suction components, we prevented adhesion inside the piping. As a result, the workload for operators on-site was reduced, and the number of machines each operator could handle increased, significantly contributing to improved production efficiency. [Results] - No adhesion occurred inside the piping, achieving 24-hour unmanned operation as planned. - The workload for operators on-site was reduced, allowing them to handle more machines. - This significantly contributed to production improvements. *For more details, please refer to the PDF document or feel free to contact us.*

We confirmed on-site how the dust generated during the operation of the dust collector behaves in relation to the plastic bag inside the drum and what factors cause problems. It was found that there was a significant amount of residual air between the inside of the drum and the plastic bag covering it, and we observed the phenomenon of air and the plastic bag being drawn toward the hopper side. To reduce the air in the gap between the drum and the plastic bag to below the internal pressure of the dust collector, we installed a vacuum piping and an adjustment valve to the drum to adjust the atmospheric pressure difference. As a result, the inner plastic gradually became closely adhered to the inside of the drum, effectively achieving dust collection capacity. [Problems] - It is unavoidable to separately install a metal cage to prevent the dust collection plastic bag from floating inside the dust collection drum. - The removal and installation of this is cumbersome. - Additionally, the workers were covered in dust. *For more details, please refer to the PDF document or feel free to contact us.*

We were facing issues with dust leakage due to early wear of the filters. Therefore, we controlled the airflow into the significantly worn filters. Additionally, by installing an improved filter made from a Kevlar blended material, we achieved stable filtration and avoided dust leakage incidents. 【Challenges】 ■ Dust collection of radioactive contaminated soil after the Fukushima nuclear accident ■ Dust collection of abrasive dust ■ Dust leakage due to early wear of the filters *For more details, please refer to the PDF document or feel free to contact us.

There were issues with the disposal of exhaust gas after cleaning, which contained film gloss wax components. Therefore, various spray nozzles were used in the exhaust gas inflow section of the wet dust collector to increase the particle size of the target substances through forced humidification of the entire gas, thereby improving the dust collection capability of the wet dust collector. After the installation of the equipment, the exhaust gas became cleaner, and there were no complaints from nearby residents, along with a significant reduction in odor. [Problems] - The vaporized oil had a very small particle size, making it a very difficult substance to process unless it mixed efficiently with water. - When washing gas containing oil with water, there were issues with wastewater, and depending on the situation, there was a risk of exceeding environmental regulatory limits. *For more details, please refer to the PDF document or feel free to contact us.*

The dust hopper at the bottom of the dust collector was experiencing issues with uneven dust distribution. To address this problem, we conducted airflow analysis using CFD (Computational Fluid Dynamics) and carried out modification work. The results after the modifications were as expected, and the problem-solving method using CFD analysis was recognized, ultimately leading to the acquisition of new orders for expansion work. Given our track record, the customer was pleased. [Case Study] ■ Problem: Uneven dust distribution in the dust hopper at the bottom of the dust collector ■ Response: - Conducted airflow analysis using CFD as an approach to problem-solving - Visualized airflow and pressure fluctuations inside the dust collector to confirm the details - Ensured stable effects could be achieved *For more details, please refer to the PDF document or feel free to contact us.