What should I do to clean the food clean room? What precautions?

The clean room clean system is already one of the necessary plans for the new food baking factory, but it is not that you can let go of everything when you make a clean room. The clean room system only allows the production process to be carried out in a good environment. Affecting the shelf life of food is also the contact pollution during the operation of the employees, the cross-contamination between the raw materials, the rationality of the formula, etc.

First, the working principle of the food dust-free workshop purification system:

Airflow → primary air treatment → air conditioning → medium-efficiency air treatment → fan air supply → purification duct → air supply opening → clean room → take away dust particles (dust, dust, etc.) → return air duct → treated airflow → fresh air flow →Initial air treatment. Repeat the above process to achieve the purpose of purification.

2. Cleanliness requirements of food dust-free workshop

According to the national "General Rules for the Review of Food Production Licensing", it is recommended that the cleanliness of the food baking workshop should reach 100,000 (300,000 is not enough for the current trend of shorter and shorter shelf life of food), and individual areas can be adjusted according to requirements. .

Cleanliness standard of 100,000 class clean room

1. Large allowable number of dust particles (per cubic meter).

2. The number of particles larger than or equal to 0.5 microns shall not exceed 3.5 million, and the number of particles larger than or equal to 5 microns shall not exceed 20,000. Recommended instrument: dust particle counter

3. Large allowable number of microorganisms.

4. The number of planktonic bacteria shall not exceed 500 per cubic meter. Recommended instrument: Plankton sampler

5. The number of Shenlong bacteria should not exceed 10 per culture dish.

6. Pressure difference: The pressure difference between clean rooms of the same cleanliness level should be consistent. The pressure difference between adjacent clean rooms of different clean levels should be ≥5Pa, and ≥10Pa between clean rooms and non-clean rooms. Recommended instrument: differential pressure gauge

7. Temperature and humidity requirements: when there are no special requirements for temperature and humidity in a 100,000-level clean room, it is advisable to wear clean work clothes that do not produce a sense of comfort. The temperature is generally controlled at 20~22℃ in winter; 24~26℃ in summer; fluctuation ±2 ℃. The humidity in the clean room in winter is controlled at 30-50%, and the humidity in the clean room in summer is controlled at 50-70%. Recommended instrument: temperature and humidity meter

8. Power distribution: The general illuminance value of the main production rooms in the clean room (area) should be ≥300Lx; the illuminance value of auxiliary studios, personnel purification and material purification rooms, air lock rooms, corridors, etc. should be 200~300Lx. Recommended instrument: illuminance meter

  3. Architectural layout of the clean room of food:

The setting of the construction plane should belong to the professional category of the construction profession, but since the food purification workshop requires the diversion of people and materials, and the static pressure gradient of each clean operation room must be maintained, therefore, the construction plane requirements in this project must have the following points:

1. Each purification operation room is set with an independent front room as an air lock, and the air lock room is communicated with each operation room at the same time to ensure that the air in the low clean area does not penetrate into the high clean area.

2. The flow of people in the laboratory goes through the dressing room, changing shoes, washing the hands in the washing room, buffering room, air shower room, and operating rooms.

3. The food air purification workshop logistics enters the buffer corridor from the outer corridor through the mechanical interlock from the **transfer window**, and then enters the operation rooms through the transfer window.

4. Structure system of food clean workshop:

According to the "Clean Workshop Design Code", the wall and ceiling of the workshop must be constructed with materials that do not produce dust and have a smooth surface and no si angle can exist in the workshop. Adopt special color plate for clean workshop construction, Baosteel 0.4 steel plate for substrate top plate, core material density 14kg/m3, aluminum material use Hualian special aluminum profile, in order to improve the service life of the purification room and achieve a beautiful effect, all aluminum profiles Perform electrophoresis.

5. Ground system of food purification workshop:

The ground is made of solvent-based epoxy resin, with a strength above C20, and a dense surface without sand, hollowing, or cracks. The color is gorgeous, the anti-static performance is constant for a long time, it can bear the load below medium, and it can withstand high temperature. On the basis of satisfying the use, it can play a decorative role, wear-resistant, scrub-resistant, dust-proof, non-slip, excellent performance, uniform color and gloss.