Indoor Self-circulating Smoke and Dust Purifier LB-ZXH
Indoor self-circulating fume purifiers, also known as indoor self-circulating integrated machines or workshop purification and circulation integrated machines, treat welding fumes by delivering a large volume of air purified by high-efficiency filter cartridges from the middle of the unit. This airflow, combined with the air intake at the top, forms a traditional bottom-supply, top-return airflow pattern for dust control, making it particularly suitable for large-scale welding fume treatment. Its advantages include the absence of ductwork, flexible placement of the main unit based on site conditions, and significantly reduced heating and cooling costs in summer and winter due to the purification of indoor air before its release.

Key Components and Features:
1. The equipment is ductless, independently installed, flexible in layout, and occupies a small area, adaptable to different user process requirements.
2. It adopts a reasonable and effective airflow organization with top suction and bottom delivery, resulting in high smoke and dust capture efficiency.
3. The equipment is equipped with casters at the bottom for convenient and flexible operation.
4. It uses imported high-efficiency filter materials, ensuring high filtration efficiency and that the filtered air meets relevant emission standards.
5. The system uses indoor circulation, reducing energy loss from direct external emissions.
6. The equipment uses PLC automatic control, allowing adjustment of airflow according to working conditions, saving energy.
7. The advantage of this indoor circulating welding fume purifier is the absence of ductwork; the main unit location can be flexibly selected according to site conditions, significantly reducing heating and cooling costs in summer and winter.
8. It can treat a large area; each 15,000 m³/h main unit can typically cover 150-300 square meters.
Benefits:
Improves Indoor Air Quality
Effectively removes smoke, dust, fumes, and fine particulate matter (including PM2.5), creating a cleaner and healthier indoor working environment.Self-Circulating Operation
The purifier continuously draws in contaminated air, filters it, and releases purified air back into the same space, eliminating the need for external ducting.Energy-Efficient and Cost-Effective
Reduces energy loss associated with exhausting indoor air outdoors and minimizes heating or cooling losses.Flexible Installation
Suitable for workshops, welding areas, laboratories, production lines, and other enclosed or semi-enclosed indoor spaces.Enhances Workplace Safety and Compliance
Helps companies meet occupational health, safety, and environmental regulations while improving employee comfort and productivity.
Advantage:
High Filtration Efficiency
Multi-stage filtration system captures large dust particles, fine dust, smoke, and harmful fumes with high efficiency.No External Exhaust Required
Self-circulating design avoids complex ductwork, reduces installation costs, and allows easy relocation.Low Noise Operation
Optimized airflow design and high-quality fan ensure stable operation with minimal noise.Modular Filter Design
Filters can be easily replaced or maintained, reducing downtime and maintenance costs.Compact and Space-Saving Design
Ideal for indoor environments with limited space.Stable and Durable Construction
Industrial-grade materials ensure long service life even in demanding working conditions.
Structure:
An Indoor Self-Circulating Smoke and Dust Purifier typically consists of the following main components:
Air Inlet System
Designed to efficiently capture polluted air from the surrounding environment.Pre-Filter
Removes large dust particles, sparks, and debris to protect downstream filters.Main Filtration Unit
High-Efficiency Filter (HEPA or equivalent): Captures fine dust and particulate matter
Activated Carbon Filter (optional): Absorbs odors, smoke, and harmful gases
High-Performance Fan / Blower
Provides stable airflow and ensures effective air circulation within the room.Control System
Includes power switch, airflow control, and optional intelligent monitoring features.Clean Air Outlet
Evenly distributes purified air back into the indoor space.Housing / Cabinet
Rigid, corrosion-resistant structure designed for industrial use.
Working principles:
Air Intake
Contaminated indoor air containing smoke, dust, and fumes is drawn into the purifier through the air inlet by the internal fan.Primary Filtration
Large particles and visible dust are captured by the pre-filter, preventing damage to fine filtration components.Fine Filtration and Purification
The air then passes through high-efficiency filters that remove fine particulate matter, smoke, and airborne pollutants. If equipped, activated carbon filters further absorb odors and harmful gases.Clean Air Recirculation
The purified air is discharged back into the same indoor environment, forming a continuous self-circulating purification loop.Continuous Operation
The system operates continuously or intermittently based on demand, maintaining stable indoor air quality without exhausting air outside.
Product Specification:
| Model | Power(kw) | Airflow(m3/h) | Size(W*L*H)mm | Filter quantity | Solenoid valve |
| LB-ZXH-4K | 4 | 3000-4500 | 1400*1200*2385-2885 | 6 | 6 |
| LB-ZXH-5.5K | 5.5 | 4000-6500 | 1400*1200*2385-2885 | 6 | 6 |
| LB-ZXH-7.5K | 7.5 | 5000-8000 | 1400*1200*3630-4250 | 6 | 6 |
| LB-ZXH-11K | 11 | 8000-11000 | 1400*1200*3630-4250 | 6 | 6 |
| LB-ZXH-15K | 15 | 10000-16000 | 1400*1200*3630-4250 | 6 | 6 |
Scope of application:
- CNC Machining: Captures oil mist generated by high-speed machining and cutting operations.
- Metalworking: Effective for processes like grinding, turning, milling, and drilling.
- Plastic and Rubber Processing: Handles fumes and mist from injection molding and extrusion processes.
- Food Processing: Removes oil mist and fumes generated during cooking and frying.
- Textile Manufacturing: Captures mist from lubrication and spinning processes.



Who are we?
We are based in Shandong, China, start from 2010,sell to North America(15.00%),Western Europe(13.00%),Eastern Europe(12.00%),Southeast Asia(10.00%),Mid East(10.00%),South America(5.00%),Africa(5.00%),Oceania(5.00%),Eastern Asia(5.00%),Central America(5.00%),Northern Europe(5.00%),Southern Europe(5.00%),South Asia(5.00%). There are total about 101-200 people in our office.
Our wide range of product types.
What is an industrial dust collector?
It’s a Air Material Separator
How does an industrial dust collector work?
It pulls in air that has multiple types of particulate in the air stream and separates the particulate from the air.
Why are industrial dust collectors important in manufacturing?
A couple of reasons, one on some machines they can’t work unless the process has dust collection in order for the machine to do it’s job and two indoor air quality.
What are the different types of industrial dust collectors?
There are Bag Houses, Cartridge collectors and even a Cyclone is considered a dust collector.
How often should I clean or maintain my industrial dust collector?
If the system is sized and installed correctly it doesn’t take a lot of baby setting. This does differ some based on the material you are trying to separate. We use Pressure Differential monitors and the filter need to be changed out based on the Differential Pressure across the filters.
What are the energy consumption considerations for industrial dust collectors?
They need Electricity to run the fan and they compressed air to clean the filters.
Are there any noise or vibration concerns associated with industrial dust collectors?
Yes, sometime you will have to use a Silencer to reduce the fan noise and the cleaning system may have to use sound deadening devices.
What are the factors that determine the capacity of an industrial dust collector?
Air to Cloth Ratio’s, loading and the type of dust are the most common.