Case Study of Wash Water Recycling Machine
Case 1: Shenzhen Zhongfu Circuit (PCB Manufacturing)
Shenzhen Zhongfu Circuit Co., Ltd. is a precision printed circuit board manufacturer. Its issue lies in the high consumption of anti-white water (a screen cleaning solution) during manual screen cleaning, as well as significant VOC (volatile organic compound) pollution caused by its evaporation.
The solution involves introducing an automatic screen cleaning machine and a white water recovery system. This system cleans the screens via spray washing to reduce consumption, and recovers waste white water using a vacuum distillation principle, with the entire cleaning and recovery process carried out within a sealed system.
Project Outcomes:
Save usage: Reduce white water consumption by 5,400 liters annually.
Cost savings: Approximately 100,000 RMB annually saved on purchasing anti-whitening agents.
Shortened payback period: The project investment recovers in approximately 2.5 years.
Case Study 2: Jingwang Electronics (Shenzhen) (PCB Manufacturing)
Jingwang Electronics (Shenzhen) Co., Ltd. also faces issues of water waste from manual cleaning and VOC pollution caused by screen washing.
The solution is the installation of a fully pneumatic resistance welding screen cleaning and screen wash liquid recirculation system (Model K-3000). This system employs closed-loop cleaning, with the washing water circulating within the equipment. The cleaning and drying processes are fully automated, and it is equipped with an exhaust ventilation system to minimize solvent evaporation in the workshop.
Project Outcomes:
Significant emission reduction: 12,204 kilograms of VOCs reduced annually.
Significant cost reduction: annual savings of 208,000 RMB.
Quick Return on Investment: With a project investment of approximately 350,000 yuan, the payback period is only 1.7 years.
On-site case: A PCB printing factory in Zhuhai
At a PCB printing factory in Zhuhai, a customer purchased a semi-automatic solvent recovery unit specifically for treating waste cleaning water generated after washing printing screens. After installation, the manufacturer provides commissioning and training to operators to ensure proper operation of the equipment.
