Adapting to the working conditions of injection molding workshop | Suzhou Qiaohui HVAC stainless steel welded air duct landing project, helping enterprises to upgrade their waste gas control.

Recently, Suzhou Qiaohui HVAC Equipment Co., Ltd. successfully completed the delivery of the ventilation and exhaust gas pipeline project of a large injection workshop. The whole project adopts 304 stainless steel welded ventilation pipeline for design, manufacture and on-site installation. In view of the complicated working conditions such as high-temperature oil fume, organic VOC exhaust gas, oily fog condensation and long-term humidity in injection molding, Qiaohui HVAC relies on mature stainless steel pipeline processing technology and standardized construction system to build a closed and stable exhaust gas collection and transportation pipe network, which helps manufacturing enterprises optimize the workshop environment, stabilize the environmental protection management system, and realize two-way promotion of safe production and green production.

In the process of injection molding, plastic raw materials are melted at high temperature and the mold is opened and closed, which continuously produces oil mist, sticky lampblack and volatile organic waste gas. This kind of waste gas is sticky and oily, accompanied by long-term adhesion and accumulation of water vapor in the pipeline. The short board of traditional galvanized air duct and bite air duct is prominent under this working condition: the galvanized layer is easy to be corroded and peeled by oil fume medium, and the bite gap is easy to accumulate oil pollution, which not only causes rapid corrosion and perforation, air leakage and waste gas overflow, but also has fire safety hazards for long-term oil accumulation; After the leak tightness of the pipeline decreases, the suction of the gas collector decreases, and the efficiency of waste gas collection is insufficient, which easily causes the odor in the workshop to diffuse, affecting the occupational health of employees, and it is difficult to meet the requirements of environmental monitoring stably.

Based on the pain points of the injection workshop, Suzhou Qiaohui HVAC stainless steel welded air duct was finally selected as the core carrier of the ventilation system. Compared with conventional air duct products, Qiaohui stainless steel welded air duct has multiple advantages to accurately match the requirements of injection molding waste gas treatment. First of all, the pipeline is fully welded by argon arc welding, and there is no bite gap, so the overall tightness is greatly improved, which effectively prevents the leakage of waste gas in the middle under negative pressure, ensures the balanced and stable gas collection air volume at each injection molding machine, and the waste gas collection rate continues to reach the standard. The inner wall of the air duct is flat and smooth, and there is no dead angle in the groove, so it is not easy to adhere to sludge and accumulate oil pollution, which reduces the probability of pipeline blockage, effectively reduces the workload of cleaning and maintenance in the later period, and avoids the fire risk caused by oil pollution accumulation.

In terms of corrosion resistance and durability, the project selects 304 stainless steel plate for processing, and the finished air duct completes weld cleaning and pickling passivation treatment, and repairs the passivation film in the welding heat affected zone, which significantly improves the resistance to water vapor and oil smoke corrosion. Faced with the operation environment of alternating high and low temperatures of injection waste gas and condensate adhesion, stainless steel is not easy to rust and damage, and there will be no perforation of pipe wall and leakage of dust waste gas after long-term operation, and its service life is much longer than that of galvanized air duct. The whole pipe network has strong rigidity, can adapt to the long-term negative pressure operation of ventilation system, is vibration-resistant and not easy to deform, reduces the air consumption of the system from the source, indirectly reduces the energy consumption of fans, and has excellent long-term comprehensive economic benefits.

As a local service provider in the field of industrial ventilation and waste gas dust removal pipelines in the Yangtze River Delta, Suzhou Qiaohui HVAC has a standardized stainless steel air duct production line, which can independently complete the customized processing of a full set of special-shaped pipe fittings such as straight pipes, elbows, tees, reducers and inspection ports, and realize pipeline prefabrication and on-site modular installation. In the project implementation stage, the technical team optimized the pipeline direction by combining the layout of injection molding workshop, the layout of injection molding machine and the parameters of waste gas treatment equipment, and set the slope, ash cleaning manhole and drainage point reasonably to avoid common problems such as condensate water retention and local vortex oil accumulation in advance; The construction team strictly implements the installation specifications of stainless steel pipes, completes the isolation and protection of dissimilar metals, and synchronously carries out the passivation and repair of welds after the completion of on-site welding positions, so as to control the engineering quality throughout the process.

After the workshop ventilation pipe network is put into use, it can quickly collect the oil mist and organic waste gas generated by the injection molding station and send them to the back-end purification equipment for treatment, which can effectively improve the workshop working environment, reduce the unorganized waste gas diffusion and ensure the stable discharge of waste gas. According to the person in charge of the project, stainless steel welded air duct has become a highly reliable preferred scheme for industrial workshops with corrosive waste gas, soot and dust in injection molding, rubber and plastic, spraying and sandblasting.

In the future, Suzhou Qiaohui HVAC will continue to focus on the needs of ventilation engineering in rubber and plastic processing, machinery manufacturing, environmental protection and dust removal and other industrial fields, and constantly optimize the processing technology and engineering supporting scheme of stainless steel welded air ducts, so as to help more production enterprises improve the exhaust gas treatment infrastructure, implement safety production norms and continuously promote the green and low-carbon transformation of manufacturing industry with stable and reliable pipeline products and one-stop installation services.