Device for formulating low concentration gas and formulating method
A technology of gas preparation and low concentration, which is applied in the direction of mixing methods, chemical instruments and methods, gas and gas/steam mixing, etc., which can solve the problems of complex and cumbersome operations, limited types of applicable gases, and large gas consumption to overcome adsorption factors Influence, wide application range, and low gas distribution concentration
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Embodiment 1
[0040] application figure 1 The device prepares low-concentration chloroform.
[0041] figure 1 It is an example diagram of a low-concentration single gas preparation device. 1-The carrier gas cylinder is a high-purity nitrogen cylinder; 2-The range of the mass flow controller is 0-2L / min; 3-The length of the capillary needle is 3-15cm, and the inner diameter is 0.1-0.3mm; 4-The volume of the heating diffusion bottle 100-200ml; 5-The temperature range of the heater is 30-95°C; 6-The material of the capillary is one or more of stainless steel, polytetrafluoroethylene, quartz, copper or brass, glass and aluminum, The total length is 150-250cm, and the inner diameter is 0.3-1.5mm; 7-mixing tank.
[0042] The parameters and materials of each part of the low-concentration chloroform preparation device in this embodiment are as follows: 3-the length of the capillary needle is 5-8 cm, and the inner diameter is 0.1-0.2 mm; 4-the volume of the heating diffusion bottle is 100-150 m...
Embodiment 2
[0047] application figure 1 The device prepares low concentration NH 3 .
[0048] Low concentration NH in this embodiment 3 The parameters and materials of each part of the preparation device are as follows: 3-The length of the capillary needle tube is 5-10cm, and the inner diameter is 0.1-0.2mm; 4-The volume of the heating diffusion bottle is 150-200ml; 5-The heater is equipped with a cooling and heating system The multi-functional constant temperature circulating water bath equipment, the temperature range of the water bath is 15~35℃; the 6-capillary is made of stainless steel, the total length is 150~180cm, and the inner diameter is 0.3~1.0mm.
[0049] Low concentration NH in this embodiment 3 The preparation process is as follows: the liquid NH 3 4-Put it into the heating diffusion bottle, raise the temperature of the water bath to the specified temperature, 1-turn on the carrier gas cylinder (high-purity nitrogen cylinder), adjust 2-mass flow controller to the specif...
Embodiment 3
[0054] application figure 2 The device prepares the mixed gas of low concentration formaldehyde and benzene.
[0055] figure 2 It is an example diagram of another low-concentration composite gas preparation device. Among them, 1-the carrier gas cylinder is an air cylinder; 2-the range of the mass flow controller is 0-2.5L / min; 31-the length of the capillary tube is 5-15cm, and the inner diameter is 0.1-0.20mm; 32-the length of the capillary tube 3~15cm, the inner diameter is 0.2~0.5mm; 41, 42-The volume of the heating diffusion bottle is 150~300ml; the heater 51-is a constant temperature water bath, and the temperature range of the water bath is 30~60°C; 52-The heater is a constant temperature Electric heating mantle, the temperature range of water bath is 30-95℃; 6-capillary is made of one or more of stainless steel, polytetrafluoroethylene, quartz, copper or brass, glass and aluminum, and the total length is 200-350cm , the inner diameter is 0.3 ~ 1.5mm. The process of g...
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Abstract
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