Food cleaning workshop needs to meet the standard of 100,000 grade air purification. The construction of a clean workshop in a food factory can effectively reduce the deterioration and mildew of the products produced, extend the shelf life of the food and improve the production efficiency. The following xian set net small for you to introduce the purification plant requirements, standards.
Classification of clean workshop in food factory
Also called clean workshop dust-free workshop, clean room, clean room, refers to the certain space within the scope of the particles in the air, bacteria and other harmful air pollutants, and the indoor temperature, cleanliness, interior pressure, air velocity and air distribution, noise, vibration and lighting, static control within the scope of a certain demand, and the special design of the room. That is, no matter how the external air conditions change, the indoor can maintain the original set requirements of cleanliness, temperature and humidity, pressure and other performance characteristics.
What is a 100,000 class clean room? Simply put, the plant has no more than 3.52 million particles with a diameter of 0.5 m per cubic meter of air. The 100,000-grade clean workshop also requires the workshop to have 15-19 air changes per hour, and the air purification time after complete air changes shall not exceed 40 minutes.
Division of clean workshop of food factory
General food factory cleaning workshop can be roughly divided into three areas: general operation area, quasi-clean area, clean operation area.
General operation area (non-clean area) : general raw materials, finished products, tools storage area, packaging finished products transfer area and other raw materials, finished products exposed risk is low area, such as the outer packing room, raw materials warehouse, packaging materials warehouse, outer packing workshop, finished products warehouse.
Quasi-clean area: requirements, such as raw material processing, packaging material processing, packaging, buffer room (unpacking room), general production and processing room, non-ready-to-eat food internal packaging room and other finished products processing but not directly exposed area.
Cleaning operation area: refers to the highest requirements for the health environment, personnel, environment requirements are high, must be disinfected and change clothes can enter, such as: raw materials, finished products exposed processing area, food cold processing room, instant food cooling room, ready to be packaged instant food storage room, instant food inside the packaging room.
In the site selection, design, layout, construction and transformation of a food factory with a clean workshop, the source of pollution, cross pollution, mixing and errors should be avoided to the greatest extent.
Factory area environment is neat, stream of people and logistic trend are reasonable.
Appropriate access control measures should be in place to prevent unauthorized access.
Maintain construction and construction completion data
Buildings with serious air pollution in the process of production should be built on the leeward side of the plant with the maximum annual wind direction.
When the production process with mutual influence is not suitable to be located in the same building, effective partition measures shall be taken between the respective production areas. The production of fermentation products should have a dedicated fermentation workshop.
Iii. Requirements for clean production area of food factory
The process of final sterilization which is required for sterility but cannot be carried out and the process of aseptic operation after sterilization which can achieve final sterilization shall be carried out in the clean production area.
Good sanitary production requirements of clean production, perishable food, instant semi-finished or finished products should be included at the end of the cooling or place of storage, processing before packing, not the sterilization of the pretreatment of raw materials, product can sealing, molding, products eventually sterilization after the exposure of the environment, the inner packing material preparation area and between the inner packing, as well as the food production, improve food features or save the processing place and checkout room, etc.
The production process and the grade of clean room should be arranged reasonably. The layout of the production line should not cause cross - over and discontinuity.
The interrelated workshops in the production area should meet the needs of varieties and processes, and there should be buffer rooms and other measures to prevent cross contamination when necessary. The buffer room area should not be less than 3 square meters.
Raw material pre-treatment shall not be used in the same clean area as finished product production.
An area and space corresponding to the production scale shall be set aside in the production workshop as the temporary storage area for materials, intermediate products, products to be inspected and finished products, and shall be strictly prevented from crossing, confusion and pollution.
The inspection room should be set up independently, and the exhaust and drainage should be properly handled. If there is air cleaning requirement in the process of product inspection, clean bench should be set up.
Fourth, food purification clean workshop air purification system working principle
Mode 1: the working principle of air conditioning air cabinet + air filtration system + clean room ventilation & insulation pipe +HEPA efficient air supply outlet + clean room return air pipe system in standard combination room is to continuously circulate and supply fresh air to the clean room workshop to achieve the cleanliness required by the production environment.
Mode 2: the working principle of FFU industrial air purifier installed on the ceiling of the clean room workshop is to directly supply air to the clean room + return air column return air system + ceiling type air conditioner refrigeration. This form is generally used for environmental cleanliness is not very high requirements, and the cost is relatively low. Such as food production workshop, common physical and chemical laboratory engineering, product packaging room, cosmetics production workshop.
Different design of supply and return air system is the decisive factor for different cleanliness grade of clean room.