Design Essentials for Industrial Workshop Ventilation Systems

1. Ventilation System Design Principles

Industrial workshop ventilation system design must follow the following basic principles:

1. Meet workshop air quality standards

2. Control workshop temperature and humidity within appropriate ranges

3. Remove harmful gases and dust

4. Ensure comfortable and safe working environment for personnel

2. Air Volume Calculation Methods

2.1 General Ventilation Air Volume Calculation

Calculate the required ventilation volume based on the amount of harmful substances emitted in the workshop:

L = G / (C_y - C_0)

Where: L is ventilation volume (m³/h), G is harmful substance emission (g/h), C_y is the maximum allowable concentration of harmful substances in the workshop (mg/m³), C_0 is the concentration of harmful substances in outdoor air (mg/m³)

2.2 Heat Balance Calculation

Calculate the ventilation volume based on the residual heat in the workshop to ensure the workshop temperature does not exceed the allowable value.

3. Duct System Design

3.1 Duct Layout Principles

1. Ducts should be as short and straight as possible to reduce elbows and branches

2. Avoid duct crossing and obstruction

3. Easy to install and maintain

4. Reasonably set inspection ports and valves

3.2 Duct Material Selection

Common duct materials include galvanized steel sheet, stainless steel sheet, PVC sheet, etc., which need to be selected according to the conveying medium and environmental conditions.

4. Fan Selection Essentials

4.1 Fan Type Selection

Select the appropriate fan type according to the pressure and flow requirements of the ventilation system:

- Low-pressure ventilation systems: axial fans, centrifugal fans

- Medium and high-pressure ventilation systems: centrifugal fans, roots blowers

4.2 Fan Parameter Determination

1. Air volume: determined according to calculation results

2. Air pressure: consider duct resistance loss

3. Power: calculated based on air volume and air pressure

4. Noise: select low-noise fans or configure mufflers

5. Dust Removal System Design

5.1 Dust Collector Type Selection

Select the appropriate dust collector according to dust properties and concentration:

- Bag dust collector: suitable for fine dust

- Cyclone dust collector: suitable for coarse dust

- Wet dust collector: suitable for high-temperature or sticky dust

5.2 Dust Removal System Layout

1. Dust collection points should be set close to dust-producing equipment

2. Duct wind speed should prevent dust settling

3. Regularly clean and maintain the dust collector

6. System Control and Monitoring

1. Set air volume and air pressure monitoring devices

2. Install temperature and humidity sensors

3. Configure automatic control system to realize fan frequency conversion adjustment

4. Set alarm devices to detect system faults in a timely manner

7. Design Considerations

1. Comply with relevant national standards and specifications

2. Consider energy saving and environmental protection requirements

3. Reserve system expansion space

4. Conduct airflow organization simulation to optimize the design plan

8. Summary

Industrial workshop ventilation system design is a complex system engineering that requires comprehensive consideration of multiple factors. Through scientific calculation and reasonable design, a good working environment can be provided for the workshop, ensuring personnel health and normal equipment operation.