Selection correction

If there is a deviation between the actual working conditions and the design conditions of the data, the correction coefficient should be selected according to the actual corresponding working conditions to make corresponding corrections, so as to select the dryer with the appropriate processing capacity.

Refrigeration dryer selection correction

入口温度修正系数
入口温度 ℃	标准N型	25	30	35	40	41	42	45
	高温H型	50	55	60	65	70	75	80
修正系数 A		1.15	1.10	1.05	1.00	0.97	0.93	0.85
使用压力修正系数
使用压力 MPa		0.4	0.5	0.6	0.7	0.8	0.9	1.0
修正系数 B		0.80	0.88	0.92	1.00	1.05	1.12	1.25
环境温度修正系数
环境温度 ℃	风冷型	25	30	32	35		38	40
修正系数 C		1.20	1.15	1.10	1.05		1.00	0.90
冷却水温度 ℃	水冷型	30	32	34
修正系数 C		1.00	0.97	0.94
压力露点修正系数
露点要求 ℃				0	2	5	7	10
修正系数 D				0.90	1.00	1.10	1.15	1.20
冷冻式干燥机选型应满足的处理量=进气流量÷（A×B×C×D） 例如：进气流量为45m³/min，入口温度为65℃，使用压力为1.0MPa，环境温度40℃，压力露点要求为2℃选风冷高温型冷干机 所选冷冻式干燥机应满足的处理=45m³/min÷（1.00×1.25×0.90×1.00）≈40m³/min，则，应该选择处理量不小于40m³/min之相应冷冻式干燥机，(水冷型选型方法相同)

吸附式干燥机选型修正

入口温度修正系数
入口温度 ℃	25		30		35		40		45	50
修正系数 A	1.00		1.00		1.00		0.97		0.88	0.73
使用压力修正系数
使用压力 MPa	0.44	0.5	0.6	0.7	0.8	0.9	1.0	1.1	1.2	1.3
修正系数 B	0.63	0.75	0.88	1.00	1.13	1.25	1.38	1.50	1.6.3	1.75
压力露点修正系数
露点要求 ℃	-20				-40				-60	-70
修正系数	1.10				1.00				0.85	0.70
吸附式干燥机选型应满足的流量=进气流量÷（A×B×C） 例如：进气流量为23m³/min,入口温度为40℃，使用压力为0.6MPa，要求压力露点-40℃ 所以吸附式干燥机应满足的处理量=23÷（0.97×0.88×1.00）≈27m³/min，则应该选择处理量不小于27m³/min之相应吸附式干燥机

国际标准压缩空气质量等级ISO8573-1

等级	颗粒	水	油
	粒径（ um ）	压力露点 ℃	更大含量mg/m³（ppm）
1	0.1	-70	0.01(0.008)
2	1	-40	0.1(0.08)
3	5	-20	1(0.83)
4	15	3	5(4.2)
5	40	7	25(21)

Qualified drying system should have the conditions
● Select the purification system based on the rated air pressure and pressure of the air compressor.
● Select the dryer model based on the intake air temperature, rated air volume, rated pressure and ambient temperature.
● Based on the dryness, that is, the dew point value, choose which type of dryer to configure.
● According to the level of oil content index and dust content index, choose to configure several stages of filtration, and confirm the type of filter.
● Confirm the configuration of the pipeline and the material of the pipeline according to the indicators of dew point, oil content and dust content.
● In the workplace with a large amount of environmental dust, install a self-cleaning filter to protect the air compressor and ensure the purification effect.
● The process of drying and purifying compressed air is mainly a process of drying and filtering, and it is also a process of decreasing temperature. Temperature plays an important role in purification, and both the intake air temperature and the ambient temperature directly affect the drying and purification effects.
● In the whole compressed air system, the setting of the air storage tank also plays an important role. Because the air storage tank has the functions of stabilizing the airflow, cooling, discharging and storing the gas, the air storage tank should be installed between the compressed air and the drying and purification equipment, and between the drying and purification equipment and the terminal gas point.
● It is necessary to systematically add waste oil collectors to collect the oil and discharge the water that meets the environmental protection requirements directly into the river.
Hidden Hazards in Untreated Compressed Air
Compressed air is an important power that is widely used in various fields of industry. When the air around us is compressed, the amount of water vapor and dust contained in a unit volume rises dramatically. At the same time, the compression process causes water vapor and oil mist in the air to condense into small droplets, which are then mixed with high-concentration dust to form mostly acidic sludge. Without compressed air reprocessing equipment, these acid sludges will enter the air pipeline, corrode pipeline materials, damage start-up tools and equipment, and ultimately lead to product quality degradation, production stagnation, increased maintenance costs, and health and safety threats.