The installation of ventilation ducts in food processing plants needs to follow a series of strict codes and standards to ensure food safety and a good working environment. Here are the general installation steps:

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1. Planning and design

- Determine the direction, location and size of ventilation ducts according to the layout, space size and production process of the food processing plant.

- Consider the demand for ventilation volume and calculate the required air volume and wind speed to ensure effective air exchange.

2. Material selection

- Choose materials that meet food industry hygiene standards, usually stainless steel, because of its rust resistance, corrosion resistance and easy cleaning characteristics.

- Ensure that the surface of the material is smooth and free of cracks, holes and rough edges to prevent dirt and bacteria buildup.

3. Pipeline production and installation

- Make ventilation pipes according to the design requirements, and use appropriate connection methods, such as welding, flange connection, etc., to ensure tight connection and no leakage.

- Pay attention to the slope of the pipe when installing, in order to facilitate drainage and prevent condensation water accumulation.

4. Fan selection and installation

- According to the requirements of the ventilation system, select the appropriate type and power of fans, such as centrifugal fans or axial fans.

- The fan should be installed on a solid foundation, and shock absorption measures should be taken to reduce vibration and noise.

5. Filter device installation

- Install suitable filtration devices such as primary, medium or high efficiency filters at the air inlet to remove dust, impurities and microorganisms from the air.

6. Cleaning and disinfection

- After installation, the ventilation duct system is thoroughly cleaned and disinfected to remove contaminants that may arise during the production process.

7. Testing and debugging

- Perform performance testing of ventilation system, including measurement of air volume, wind speed, pressure and other parameters, to ensure compliance with design requirements.

- Debug the system, adjust the fan speed, valve opening, etc., to achieve the best ventilation effect.

8. Maintenance and maintenance

- Make regular maintenance plan, including cleaning filters, checking pipe tightness, maintaining fans, etc., to ensure the long-term stable operation of the ventilation system.

In the installation process, it is recommended that a professional ventilation engineering company carry out the construction, and strictly follow the relevant regulations and standards, such as the "Food Safety National Standard General Hygiene Code for Food Production".