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Dust Treatment Project of Zhejiang Qili Co., Ltd. (Cartridge Dust Collector)

Author：中环绿洲Date：2026-05-18 11:07:036

Information summary：

Entrusting Party: Zhejiang Qili Co., Ltd.

Design Institution: Zhonghuan Lvzhou (Shandong) Equipment Manufacturing Co., Ltd.

1. Project Overview

During the production process of Zhejiang Qili Co., Ltd., a large amount of dust is generated in the processes such as metal cutting in stamping workshop, injection molding parts polishing in synthetic resin workshop, engine mechanical processing and pretreatment in coating workshop. Such dust has complex components and scattered emission points. It not only affects production accuracy and product quality, but also endangers employees' occupational health, which is inconsistent with the enterprise's green development goals. To consolidate the leading environmental protection status, ensure production safety and employee health, Zhejiang Qili Co., Ltd. entrusts Zhonghuan Lvzhou (Shandong) Equipment Manufacturing Co., Ltd. to customize a special dust treatment scheme with cartridge dust collector as the core equipment.

2. Pollutant Analysis and Hazards

2.1 Main Pollutants

The core pollutant of this project is multi-component industrial dust, which can be divided into three categories according to different production processes: first, metal dust (mainly steel and aluminum particles) generated by stamping and mechanical processing; second, plastic dust (such as PP and ABS resin particles) in synthetic resin workshop; third, paint-containing dust and mixed dust generated from coating pretreatment and polishing processes, mainly composed of metal oxides, resin residues and coating additives.

2.2 Formation and Hazards of Pollutants

Such dust is mainly produced by high-speed interaction between tools and workpieces or material friction and crushing in the processes of metal cutting, parts polishing and resin processing. Its hazards are reflected in three dimensions: human health, production safety and environmental quality.

2.2.1 Hazards to Human Health

Particles with particle size ≤5μm in metal dust can penetrate deep into human lungs. Long-term inhalation is easy to cause occupational diseases such as pneumoconiosis and metal poisoning. Organic components in plastic dust and paint-containing dust will irritate respiratory mucosa and skin, leading to allergic diseases. Some components may also affect nervous system function through metabolism, posing continuous threats to the health of front-line employees.

2.2.2 Production Safety and Quality Risks

Both metal dust and plastic dust are combustible dust. When accumulating to the explosion limit in the closed workshop space, explosion accidents are easily triggered by electric sparks or high temperature of equipment. At the same time, floating dust is easy to adhere to the surface of auto parts, especially precision engine components and coating surfaces, resulting in reduced assembly accuracy and paint surface defects. It increases rework costs and weakens the market competitiveness of products.

2.2.3 Ecological Environmental Impacts

Uncollected dust drifts to the factory area and surrounding areas, polluting the atmospheric environment and surface vegetation. The infiltration of paint-containing dust with rainwater may pollute soil and water body. It is inconsistent with the development concept of harmonious coexistence between society and environment, and may damage the enterprise's environmental protection demonstration image.

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3. Design Basis and Principles

3.1 Design Basis

Environmental Protection Law of the People's Republic of China
Atmospheric Pollution Prevention and Control Law of the People's Republic of China
GB 16297-1996 Comprehensive Emission Standard of Air Pollutants
GBZ 2.1-2019 Occupational Exposure Limits for Hazardous Factors in Workplace Part 1: Chemical Hazardous Factors
GB 3095-2012 Ambient Air Quality Standards
Relevant technical specifications of Air Pollution Control Engineering
GB 50243-2016 Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering
GB 50235-2010 Code for Construction and Acceptance of Industrial Pipeline Engineering
National electrical industry standards: GB 50054-2011 Code for Design of Low Voltage Power Distribution
GB 50034-2013 Standard for Lighting Design of Buildings
GB 50055-2011 Code for Design of General Electrical Equipment Distribution

3.2 Design Principles

Benchmark Compliance Principle: The emission concentration and rate of treated dust not only meet national mandatory standards, but also reach the international advanced level. It conforms to the enterprise's environmental positioning of "National Environment-Friendly Project" and meets the requirements of ISO 14000 environmental management system.
Safety Adaptation Principle: According to the characteristics of multi-component combustible dust, the equipment is strengthened with anti-explosion and anti-static design, equipped with dust concentration monitoring and automatic alarm system to adapt to the high automation and high continuity production rhythm of automobile manufacturing.
High-efficiency Precision Principle: Combined with the characteristics of multi-process and scattered dust generation points in multiple factories, the mode of zonal collection and centralized treatment is adopted. High-efficiency cartridge dust removal equipment is selected to realize accurate treatment of different types of dust.
Economic Long-term Principle: Optimize equipment layout and pipeline design to reduce system energy consumption. Special wear-resistant and anti-adhesive filter materials are selected to extend the service life of vulnerable parts, controlling operation and maintenance costs while ensuring treatment effect.

4. Design Objectives

Through the systematic treatment of the cartridge dust removal system, the following core objectives are achieved to consolidate Qili's leading environmental protection position:

The dust emission concentration strictly complies with GB 16297-1996 and local relevant standards. The external discharge concentration is ≤5mg/m³, which is better than the conventional standard to reflect the enterprise's environmental responsibility.
The exhaust funnel of each factory shall be set in accordance with specifications. The height of the main exhaust funnel of a single factory shall not be less than 25 meters to ensure sufficient high-altitude diffusion of purified waste gas and avoid impact on the surrounding environment.
The dust concentration at each operating point in the workshop is controlled below 4mg/m³ (in line with GBZ 2.1-2019 standard), which completely improves the operating environment, eliminates hidden dangers of dust explosion and ensures employees' occupational health.
The dust removal efficiency of the whole system is ≥99.5% with high automation. It can realize remote monitoring and intelligent operation and maintenance, meeting the enterprise's three-shift continuous production requirements and adapting to the intelligent manufacturing system.

5. Dust Treatment Process Design and Description

5.1 Process Selection Basis

The workshop production dust has prominent characteristics including complex components, fine particles, scattered dust generation points and slightly sticky partial dust. The enterprise has extremely high requirements for the efficiency, stability and intelligence of the dust removal system. Therefore, the pulse jet cartridge dust removal process is selected for this scheme. This process is maturely applied in the automobile manufacturing industry with the following core advantages:

Excellent filtration precision: PTFE membrane-coated filter cartridge is adopted. The collection efficiency for metal dust and plastic dust above 0.3μm can reach 99.9%, which can effectively control fine dust emission and ensure the external discharge concentration is far below the standard limit.
Large unit filtration area and compact equipment volume: It is suitable for the dense layout of each workshop of Qili, saving installation space and reducing plant renovation cost.
Strong pulse jet cleaning strength and high efficiency: The cleaning cycle and pressure can be accurately adjusted according to different dust types to avoid filter cartridge blockage. It can effectively reduce adhesion residue especially for slightly sticky coating dust.
High system intelligence: It can be linked with the enterprise's existing production monitoring system to realize real-time dust concentration monitoring, equipment operation status early warning and automatic start-stop control, adapting to the intelligent manufacturing needs of the automobile industry.

5.2 Process Flow Chart

Dust generation point → Dust collecting hood → Dust removal pipeline → Manual air valve → Pulse jet cartridge dust collector → Induced draft fan → High-altitude exhaust funnel → Standard discharge

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6. Company Introduction

Aiming at the treatment difficulties of multi-component dust in the automobile industry, our company has successfully built customized solutions for many mainstream automobile manufacturers and parts suppliers. It is widely recognized with the core advantages of efficient compliance, intelligent stability and controllable cost. Relying on professional technical team and perfect service system, we combine Zhejiang Qili's environmental protection concept and production characteristics to provide all-round technical support. We ensure high-standard project implementation and long-term stable operation, helping the enterprise achieve the development goal of harmonious coexistence with society and environment.

Zhonghuan Lvzhou Consulting Hotline: 158-5314-5085

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