Knowledge of clean technology (air purification engineering)

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Knowledge of clean technology (air purification engineering) Font size: Large - Medium - Small wyt5158 Published on 09-09-18 06:38 Views (7) Comments (0) Clean technology is also known as contamination control technology. It refers to the technology used to control contaminants in the environment surrounding an object (product, person, or animal) during processes such as processing, disposal, treatment, protection, and experimentation – contaminants that affect the quality, compliance rate, or success rate of these processes. ** The contamination caused by contaminants includes damage to products and harm to humans. Contamination includes direct contamination and cross-contamination (referred to as infection in the medical field). Humans are the main source of pollution: **the human body releases 100,000 particles per minute (with a particle size of ≥0.5μm)** ； 6 to 13 grams of skin cells are shed per day, resulting in approximately 3.5 kilograms of human cells being shed over the course of a year. According to tests, operators account for 80% of the sources of micro-contamination in semiconductor cleanrooms. ** Different objects have different requirements for contaminant control. These include: (1) particulates suspended in the air (abiotic and biotic); (2) molecular contaminants suspended in the air; (3) viruses; (4) micro-vibrations; (5) static electricity; (6) impurities associated with process-related media such as high-purity industrial gases, specialty gases, high-purity water, and high-purity chemicals. ** Cleanroom technology covers the following areas: (1) Cleanroom technology (industrial cleanrooms, general domestic cleanrooms, and isolated biological cleanrooms): This includes air purification, building decoration, control of sources of contamination, as well as the elimination of static electricity and prevention of micro-vibrations. ⑵Production, transportation, and purification of high-purity industrial gases, specialty gases, high-purity water, and high-purity chemicals. ⑶Detection and monitoring of contaminants. ** Application areas of clean technology include: microelectronics, optoelectronics, and electronic materials ； Instrumentation, precision machinery ； Pharmaceuticals and Biotechnology ； Beverages, food, cosmetics ； Healthcare (clean operating rooms and laboratories) ； Aerospace, spaceflight, and **science, etc…. General overview of HVAC design for constant temperature and humidity – Areas such as laboratories where strict requirements are placed on temperature and humidity. b) The HS series of water-cooled constant temperature and humidity air conditioners are used in areas with an adequate water supply and the conditions necessary for installing cooling towers ； The HF series of air-cooled split units are suitable for areas where water sources are scarce or where it is not appropriate to install cooling towers. c) Our company can, based on the actual requirements of users and through professional design and manufacturing, produce non-standard, large-scale constant-temperature and constant-humidity air conditioning units suitable for customer use. II. Technical specifications of the water-cooled, constant-temperature and constant-humidity clean air conditioner: (Example) a) Model: TZ090-15HS b) Air volume: 9000 M3/H; external pressure difference: 550 PA c) Cooling capacity: 38356 KCAL/H; heating capacity: 20640 KCAL/H; humidification capacity: 13 KG/H d) Filters: 2” panel-type non-woven fabric primary filter, bag-type non-woven fabric secondary filter e) Temperature control range: 22~26°C ± 2°C f) Humidity control range: 50%~70% ± 5% g) Compressor: Imported brand compressor (Glycol, USA, 15 HP) h) Components: Indoor unit (including primary filter, direct-evaporation surface cooler, electric heater, electrode-type humidifier, fan, motor, secondary filter), water-cooled compressor unit, and automatic control system. The electrical control section includes: i) fan and motor starting devices, comprising: switch buttons, relays, magnetic contactors, overload protection, transformer ； j) The PLC, with its Chinese-language display, controls the temperature and humidity; the touch screen human-machine interface is used for monitoring ； k) The electrical control unit is installed as an integral part of the machine set; it does not include the wiring connections from the electrical control box to the power supply ； l) The water-cooling unit does not include the water pump, water tower, and their piping systems as per the connection specifications. III. Instructions for the design and installation of constant temperature and humidity air conditioning systems: 1. Vibration dampers should be installed on the chilled water units, chilled water pumps, and cooling water pumps; flexible connectors should be used for the pipes or ducts that connect to these devices. 2. The insulation material installed on the supply air ducts and fresh air ducts in non-air-conditioned areas has a thickness of 20 mm to 50 mm, while the insulation material used in air-conditioned areas has a thickness of 10 mm to 20 mm. During installation, if aluminum foil glass wool mats are used, they should be attached to the duct walls with glue and fixed using plastic nails; the spacing between these plastic nails should be around 300 mm. The joints of the glass wool mats should be sealed tightly with ribbed aluminum foil tape to prevent any air leakage. Finally, the entire assembly should be tied up with packing plastic tape at intervals of about 1 meter. For uninsulated duct machine supports and hangers, apply anti-corrosion red lead paint twice first, followed by two coats of gray paint. If PEF is used for insulation, it should be secured with special adhesive, and the joints should be tightly sealed with PEF sealing tape equipped with adhesive, to ensure no risk of air leakage. 3. For frozen water pipes and cooling water pipes, when the pipe diameter dn≦100mm, standard galvanized steel pipes are used with welding or threaded connections (or PU pipes); when the pipe diameter is 100