Dust Removal Project for a Newly Built Workshop at an Electric Vehicle Manufacturer in Jiangsu

This project is for a newly built workshop of an electric vehicle manufacturing company in Jiangsu. The welding area is over 30,000 square meters, with plans to set up 300 welding robots and 860 manual welding stations. All the welded parts are components of electric tricycles.

Dust Collection Plan: Blowing-Suction Centralized Dust Removal

Workshop to be treated: The workshop is divided into 8 spans in total, 4 spans are 180 meters long and 20 meters wide, and 4 spans are 180 meters long and 30 meters wide.

The volume of the building that needs treatment is 180m (total length) × 200m (width) × 5m (height of the air inlet arrangement) = 180,000 m³.

The national standard requires total dust concentration to be ≤4mg/m³. According to the ventilation manual and indoor pollutant concentration, the air exchange rate is taken as 8 times per hour, so total air volume is: 180,000 × 8 = 1,440,000 m³/h. Considering air volume loss and duct resistance, at least 70 sets of MLWF2000-C blowing-suction dust removal units are selected, each with an air volume of 20,000 m³/h, for a total air volume of 1,400,000 m³/h.

The overall indoor air purification flow is as follows: On one side of the workshop, 15 supply fans provide the airflow toward the middle span. In the middle span, the dust removal units suck in air under negative pressure for purification, and the cleaned air is then converted into supply airflow to be pushed toward the next span, and so on. This creates an air curtain flow toward one side of the workshop. Finally, after the last span with 18 dust removal units meets the purification standards, the air is discharged outdoors in an organized way through 3 chimneys. Each chimney is 16,000 mm with an airflow of 120,000 m³/h, making the total exhaust airflow 360,000 m³/h.

The smoke purifier uses fine filtration technology and features internationally advanced PTFE-coated polyester fire-resistant filter cartridges. It has high filtration precision, achieving a 99.9% efficiency for smoke particles as small as 0.3μm, while maintaining excellent airflow. Under the pull of a high negative pressure fan, welding smoke and waste gases are collected through our pre-selected dust extraction devices, then sucked into the device's air inlet via ducts. A guide plate at the air inlet ensures the smoke and gas flow evenly into the settling chamber. Using gravity and the upward airflow, coarse dust particles fall directly into the ash collection drawer first. The finer dust is trapped by the filter cartridges and accumulates on their surface. The central purification system’s control unit, using a differential pressure sensor, detects when air resistance reaches a certain level that affects suction. At this point, it automatically cycles the solenoid valves to backblast and clean the filters. The dust automatically falls into the ash bucket. Meanwhile, the purified air passes through the filter cartridge, flows into the clean chamber, and is discharged through the outlet as clean air.

Advantages of MOLAND Suction-Blowing Dust Removal:

1. Energy Saving

A. The fan speed automatically adjusts based on the number of workstations, reducing direct power consumption while ensuring dust removal effectiveness. B. The automatic ash cleaning cycle and duration can be adjusted according to smoke and dust concentration, saving compressed air and indirectly saving energy. (Energy consumption of compressed air is about 30%-50% of the dust collector fan's energy consumption)

2. Safety

Pipeline spark detection, automatic sprinkling, automatic pressure relief for pressure vessels, fireproof dampers at air inlets and outlets, main machine temperature monitoring, and energy sources that could harm people can all be locked.

3. Stability

The entire system's status is monitored, including filter cartridge condition, fan chamber temperature, motor temperature, and bearing box temperature in real time; any abnormality triggers an alert immediately, addressing problems at the very early stage.

4. User-Friendly

Three control modes: remote linking, manual, and automatic. All operation/alarm parameters can be set (with operator/admin mode to prevent random changes) and default values are indicated.

This project is equipped with a PLC programmed with MOLAND's independently developed software. The touchscreen displays the working status of the purification equipment and provides control and monitoring for all the device's functions. (Unique company feature: After each time the purifier stops working, the control system will automatically clean each filter one by one, and once the cleaning is done, the purifier will automatically shut down, ensuring the equipment maintains 95% of its original efficiency.)

Shandong Moland Environmental Protection Technology Co., Ltd. was established in 2016 and is located at 11889 Jing Shi West Road, Jinan Economic Development Zone. It's an environmental tech company specializing in the research, manufacturing, and sales of high-efficiency smoke purification systems. The company is committed to reducing the environmental impact of production processes, protecting workers from harmful gases and dust, and creating a cleaner working environment. Currently, our products have been successfully applied in industries like automotive, rail, construction machinery, marine engineering, aviation, as well as in sectors like new materials, grain, wood, and recycling processing. The company has passed ISO9001 quality management system certification, received the China Environmental Protection Product Certification from the China Environmental Protection Industry Association, obtained the EU CE certification, and holds multiple invention patents, utility model patents, and design patents. Through continuous R&D innovation, many of our products have reached internationally leading levels. Meilan Environmental Protection offers services covering the entire process from project design and product manufacturing to installation, commissioning, and after-sales support. We’re here to provide you with the most professional solutions and top-quality service.