Whether it is biopharmaceuticals, chemical synthetic drugs or raw materials, pharmaceutical companies often need to use a variety of flammable and explosive organic solvents in the production process and production process. Such substances are flammable and explosive substances, so a series of measures must be taken Explosion-proof measures to ensure safe production.
In the design process of explosion-proof workshops, the corresponding explosion-proof type should be selected according to the division of explosion-hazardous areas, equipment types and explosion-proof structure requirements, and professional design and strict acceptance procedures should be carried out in accordance with the particularity of relevant current specifications, regulations and requirements. to ensure technical security.
The clean explosion-proof lamps in the pharmaceutical explosion-proof clean workshop should not only meet the explosion-proof standards, but also meet the GMP requirements, so attention should be paid to the following aspects:
Analysis of problem points of lamps and lanterns in pharmaceutical explosion-proof clean workshop
1. Static electricity
Explosion-proof lampshades are usually made of PC or tempered glass with a thickness of 2-3mm as transparent parts, and the impact resistance must pass the free-fall impact test of a 1Kg steel ball at a height of one meter. There are currently two methods of PC anti-static treatment: 1) Apply anti-static liquid; 2) Nano-coating technology. The antistatic performance of antistatic liquid and nano-coating gradually weakens or even disappears completely over time. In order to reduce safety accidents caused by static electricity, tempered glass should be used for the lampshade of explosion-proof lamps.
2. Air conditioning system
The pressure difference requirement in the clean room is mainly accomplished through the air supply and air intake system of the air conditioner. The directional wind speed must be greater than 0.2m/s. Electrons will be derailed by external force, and objects of different materials will be separated after contact to generate static electricity. Explosion-proof luminaires need to prevent the accumulation of net electric charges.
Sealing is the key point that must be solved for clean explosion-proof lamps, which is related to both safety requirements and cleanliness requirements. It should be noted that the sealing strip of explosion-proof lamps is easy to age in complex industrial environments, causing the lamps to lose their airtightness.
4. Dust storage
Clean explosion-proof lamps need to be easy to wipe and avoid difficult-to-clean parts. In addition to meeting the explosion-proof requirements, the connection between the shell and the lampshade should also reduce the dust-hiding parts as much as possible to meet the cleanliness requirements.
5. Bacterial growth
Explosion-proof lamps have a large internal volume, heat is generated during the operation of the lamp, and the air in the lamp housing expands, resulting in an increase in internal pressure. When the luminaire stops running, the air in the shell pre-cools and shrinks, resulting in a decrease in internal pressure, which will suck air particles into the cavity of the luminaire and deposit them. In addition, dead ends or poor sealing of the structure will cause bacteria to grow in the cavity or dead ends of the luminaire. Failure to clean, disinfect and sterilize will become a risk point affecting the cleanliness of the workshop.
The material of clean explosion-proof lamps is very important. In addition to meeting the safety requirements in the explosion-proof environment of medicine, it should also meet the cleanliness requirements of medicine, and have properties such as corrosion resistance, oxidation resistance, impact resistance, and anti-static performance.
7. Positive pressure
The pharmaceutical clean room must maintain a certain positive pressure (such as the absolute pressure difference in the aseptic filling room is about 45pa), and the air flow in the clean room flows according to the flow pattern. In this state, the particles and bacteria deposited on the surface of the lamp or in the shell remain basically static .
8. Pressure relief
The interior of the lamp cannot be cleaned and sterilized, and a certain amount of particles will be deposited, and bacteria will also breed. In a state of balanced pressure (bacteria and particles), there is less overflow. When the door is opened, the air pressure balance is broken (instantaneous pressure release) and pressurized Poor impact The air flow direction in the clean room changes, and the flow speed is accelerated, and the particles and bacteria in the lamp cavity are easily released into the clean area, resulting in an increase in the number of dust particles in the workshop, and at the same time, there is a certain increase in planktonic and sedimentary bacteria.
Explosion-proof explosion-proof clean panel lighting solutions
1. Anti-static and impact resistance
(1) Tempered glass
The impact-resistant transparent parts use 10mm thick ultra-white ultra-flat tempered glass with a light transmittance of more than 93% to prevent static electricity and avoid safety accidents caused by static electricity. Pass the 1kg steel ball 1m height free fall impact test to meet the performance requirements of impact resistance.
(2) Aluminum alloy frame
The lamp shell is made of aluminum alloy, and the surface coating is treated with conductive powder to achieve permanent anti-static function. The thinnest part of the aluminum alloy shell is not less than 4mm, and the explosion-proof surface is not less than 12.5mm, which meets the requirements of shell protection and impact resistance.
2. Sealing performance
(1) Protection class IP68
The protection level of the clean explosion-proof lamps has been upgraded to IP68, which completely solves the problems of dust storage, dust accumulation, bacterial growth inside the cavity, opening the door to release pressure, and dust leakage. The power supply is built-in, which meets the regulatory requirements that the electronic components of explosion-proof explosion-proof lamps are completely isolated inside the shell. Meet the double standards of explosive gas environment and explosive dust environment, and meet the cleanliness requirements of pharmaceutical and chemical workshops for explosion-proof lamps.
(2) Easy to wipe, no dead ends
The epoxy resin pouring process is used to bond the tempered glass to the frame, and the sealing requirements of the whole lamp can be met without using sealing strips; the appearance is arc-shaped design, no dead angle, easy to wipe and clean.
(3) Explosion-proof joints
The outlet device of explosion-proof lamps must meet the sealing requirements. The explosion-proof connector is made of brass. Brass has strong wear resistance and flexibility, and it is not easy to produce tiny metal particles due to friction, and it can avoid cracking when the connector is connected to the explosion-proof pipe Reduce safety hazards.
3. Trouble-free running time
(1) Power solution
Built-in industrial-grade bipolar flicker-free drive power supply and original electronic components are used to increase the conversion efficiency to more than 90% and reduce heat energy; using glue-filling packaging technology, the electronic components are heated evenly, dissipate heat quickly, and reduce operating temperature.
(2) Light source scheme
The chip uses high-brightness lamp beads, and the scheme is parallel first and then connected in series. The thickness of the copper foil is 2 ounces to ensure the smoothness of the current and improve the stability of the light source.
(3) Thermal design
The chip and power supply dissipate heat through the 6kg aluminum alloy frame and backplane. The effective heat dissipation cross-sectional area is 0.288㎡, and the junction temperature is below 45°C. Good heat dissipation effectively prolongs the service life of electronic components, avoids failure due to internal heat, and improves the overall performance. lamp stability.
(4) Maintenance-free life
Excellent electronic components are matched with a good heat dissipation design scheme, which ensures a trouble-free operation time of more than 50,000 hours.