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Purification engineering

Release time：2019-09-02 | Source：HUA LI JI DIAN.

Purification works

Clean Room, also known as a clean room or clean plant, refers to the removal of particles, harmful air, bacteria and other pollutants in the air within a certain space range, and the indoor temperature, cleanliness, indoor pressure, air flow speed and air flow distribution, noise vibration and lighting, static control within a certain range of demand, And the specially designed room is given.That is, regardless of the change in the external air conditions, its indoor can maintain the original requirements of cleanliness, temperature and humidity and pressure and other properties. Widely used in semiconductors, microelectronics, PCBs, optoelectronics technology, optical instruments, bioengineering, medicine and health, fine chemicals and food industry and other high-tech fields to provide 10 -100,000 levels of clean production environment.

Classification of clean rooms

By Purpose

（1）Industrial cleanroom - with inanimate particles as the control object. Mainly control the pollution of the working object by inanimate particles, the internal general lysing is generally maintained positive pressure. It is suitable for precision industry, electronics industry, aerospace industry, atomic energy industry, printing industry, photography industry and other departments.

（2）Biological cleanroom - with living particles as the control object, can be divided into:

1、General biocleanroom. The main control of the pollution of the working object by living particles. At the same time, the internal material to withstand a variety of sterilization agent erosion, the internal general lysing. Can be used in the pharmaceutical industry, food industry, medical facilities, laboratory facilities, etc.

2、Biosafety cleanroom. The main control of the working object has the pollution of the outside world and people, the internal need to maintain negative pressure. For experimental facilities, bioengineering, medical facilities, etc.

By Airflow

By Airflow:

1、 Non-one-way flow cleanroom

The principle of a non-one-way flow cleanroom is dilution. When a clean air stream is fed from the air outlet, it quickly spreads and mixes around. At the same time, almost the same amount of air flow from the return air vent spout, this clean air flow dilutes the indoor air pollution, the original high concentration of dust indoor air diluted, has been to achieve balance. So the faster the air flow diffuses, the more uniform it is, and the dilution is of course better.

2、One-way flow cleanroom

Features of one-way clean rooms:

The flow rate on the whole chamber section is more uniform

Flow parallel in the work area (flow parallel refers to the average flow line parallel to each other)

There is no vortex in the work area.

Classification of one-way flow cleanrooms?

Vertical single cleanroom?

1、The roof is covered with high-efficiency filter air, full-floor grille return wind this is a typical vertical one-way flow cleanroom, the advantage is: can obtain uniform downward one-way air flow, so self-purification ability, can achieve the highest level of cleanliness.

2、The high-efficiency filter roof damping layer of the measuring cloth is air-drenched, and the full floor grille is backwind.

3、The roof and side cloth high efficiency filter gives the air, the full floor grille returns the wind.

4、Full roof to send wind, both sides down the wind.

Horizontal unidirectional flow clean room

1、The wind-sending wall is covered with high-efficiency filter horizontal air delivery, full wall return wind

2、Tunnelone-way flow

3、Mixed flow cleanroom (local one-way flow), cleanliness grade standard (commonly used), U.S. Federal Standard FS209E to ensure that the clean room (plant) in the dust particles in the clean room (plant) clean class required dust particles within the number of dust particles, generally to purify the air conditioning system using three or four air filters, To intercept particles of dust entering the indoor airstream, the air filter used is divided into the following types of air filters by their effect on air filtration: primary filters, medium-effect filters, sub-efficient filters, and high-efficiency filters.

Material requirements

Clean room building decoration can have a direct impact on the clean room comprehensive, so the requirements: smooth surface, wear resistance, not easy to produce static electricity, do not absorb moisture, not wet, material does not produce dust, not easy to build dust (tight), ground wear resistance, resistance to erosion, anti-static, anti-slip, easy to clean.

Structural materials

1、Clean plant wall, roof materials generally use 50mm thick sandwich color steel plate manufacturing, its characteristics are beautiful, strong rigidity. Arc corner, door, window frame, etc. are generally made of alumina profile.

2、Ground can use epoxy self-flow floor or advanced wear-resistant plastic floor, there are anti-static requirements, can choose anti-static type.

3、Return wind pipe with hot galvanized plate made, paste purification insulation effect good flame retardant type PF foam plastic plate.

4、High-efficiency air vent with stainless steel frame, beautiful clean, punched mesh plate with paint aluminum plate, do not rust non-stick dust, should be clean.

Purification parameter requirements

Purify room temperature, humidity range

Pre：Dust-free workshop purification project

Next：Nothing

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