Key points of laboratory ventilation system construction

Key points of ventilation pipe design:

It is a better way to connect a fume hood and a fan with a single pipe.

Can not be connected with a single pipe, only limited to the same floor in the same room can be connected with each other.

The fan should be installed at the end of the pipe (on the roof, etc.) as much as possible.

The shorter the pipe length, the better.

The more the fume hood connected with a fan is burned, the better. The exhaust passage should be as upright as possible, and the higher the passage, the better.

If the wind speed of air duct needs to be changed, the corresponding frequency conversion adjustment system should be configured.

The end of the exhaust channel should avoid the air supply port of the air supply pipe as far as possible, so as to prevent the harmful gas from being sent to the fume hood through the exhaust pipe.

How to choose fume hood

The fume hood is not a separate equipment, the change of external environment will affect the performance of the fume hood. At the same time, the fume hood and its control system will also affect the surrounding environment. When you select the fume hood:

First of all, we must consider the factors of the whole system, such as the space of the laboratory, the ventilation control system of the building, the arrangement of the exhaust pipe and the placement of the fume hood, etc. the R & D personnel and system engineers of Dalian Ruixin are willing to work with you to provide a safe and comfortable overall design and planning for your laboratory.

Secondly, you need to determine which type of fume hood you need. When selecting, you can usually measure according to the following factors:

1. Over the counter part:

There are three styles: standard type, low table type and floor type

Whether the surface wind speed of the fume hood meets the safety wind speed requirements specified in the international standard: 0.5m/s (according to the international standard, only when the surface wind speed reaches 0.5 m / s can the harmful gas in the cabinet be effectively captured)

Does the opening height of the fume hood meet your requirements for operating space

Ventilation control system: constant air volume, variable air volume or adaptive control system

Lining board material: anti beta board, epoxy resin board.

Whether the raw material of the regulating door is made of safety glass, and whether the design conforms to human body mechanics, so that the operator can pull freely

2. Table part: whether the safe dish design is adopted for the table surface, so as to facilitate the user to clean the table and prevent the leakage of toxic liquid

Does the material of the table meet the requirements of your experiment and resist the corresponding extra etching and high temperature

Whether the cup groove and water tank are installed, and whether the installation position is reasonable.

Is the design of air outlet reasonable

3. Low cabinet part:

Whether the material is solid and durable, whether it is fireproof material, whether it can resist the corrosion of acid and alkali environment in the laboratory

Is the power supply reasonable and safe

Is it convenient to maintain water, electricity and gas systems

Does the bottom cabinet need air extraction design so that you can place volatile drugs

After you have basically selected the model, style and size of the fume hood, you can determine what you need according to the following conditions

4. Accessories:

Water source: distilled water, pure water or reverse osmosis, etc

Gas source: nitrogen, oxygen or air, etc

The choice of electrical system should consider: model, voltage, explosion-proof, durability and so on

Is it necessary to seal the plate for the sake of beauty