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Microscale water vapor generating device and method

A water vapor generation and micro-volume technology, applied in the steam generation method, steam generation, control system, etc., can solve the problem that the amount of water vapor cannot be accurately controlled, and achieve precise controllable carrier gas flow and condensation temperature, continuous and stable supply , the overall structure is simple

Active Publication Date: 2018-06-29
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of traditional steam generators that cannot stably provide small flow of water vapor and the amount of water vapor produced in the bubbling method cannot be precisely controlled, the present invention provides a device that can stably provide small flow of water vapor and precisely control its output and generation method

Method used

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  • Microscale water vapor generating device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] If the user needs the mixed gas flow q=1000mL / min, the temperature t 1 =80°C, where the water vapor concentration c 1 =5%, the carrier gas flow rate should not be higher than 350sccm. Assuming that the cooling effect of the spiral coil is good enough, the outlet carrier gas temperature t 0 and constant temperature water bath temperature t 2 Consistent, outlet carrier gas pressure p 0 = 1 atm.

[0026] Water vapor flow rate in mixed gas: q 1 =q×c 1 =1000×5%=50mL / min;

[0027] Water vapor flow rate under standard state: q 1,0 =q 1 ×273 / (273+t 1 )=50×273 / 353=38.67 sccm.

[0028] Assuming the water bath temperature t 2 =50°C, then the outlet carrier gas temperature t 0 =50°C, according to the thermal properties of saturated water vapor, t can be obtained 0 =50°C,p 0 = Saturated vapor pressure p = 0.012345MPa under the state of 1 atm.

[0029] Water vapor concentration in carrier gas:

[0030] Required standard gas flow rate: q 2 =q 1,0 / c2 -q 1,0 = 38.6...

Embodiment 2

[0033] If the user needs the mixed gas flow q=1000mL / min, the temperature t 1 =80°C, where the water vapor concentration c 1 =5%, the carrier gas flow rate should not be higher than 250sccm. Assuming that the cooling effect of the spiral coil is good enough, the outlet carrier gas temperature t 0 and constant temperature water bath temperature t 2 Consistent, outlet carrier gas pressure p 0 = 1 atm.

[0034] Water vapor flow rate in mixed gas:

[0035] Water vapor flow rate under standard state: q 1,0 =q 1 ×273 / (273+t 1 )=50×273 / 353=38.67 sccm.

[0036] Assuming the water bath temperature t 2 =50°C, then the outlet carrier gas temperature t 0 =50°C, according to the thermal properties of saturated water vapor, t can be obtained 0 =50°C,p 0 = Saturated vapor pressure p = 0.012345MPa in the state of 1 atm.

[0037] Water vapor concentration in carrier gas:

[0038] Required standard gas flow rate: q 2 =q 1,0 / c 2 -q 1,0 = 38.67 / 0.1218-38.67 = 278.82 sccm

[...

Embodiment 3

[0045] If the user needs the mixed gas flow q=1000mL / min, the temperature t 1 =80°C, where the water vapor concentration c 1 =5%, the carrier gas flow rate should not be higher than 350sccm. Assuming that the cooling effect of the spiral coil is average, the outlet carrier gas temperature t 0 higher than the constant temperature water bath temperature t 1 , outlet pressure p 0 = 1 atm. Assuming that the temperature of the water bath is 50°C and the outlet carrier gas temperature is 55°C, the water vapor carryover is different from Example 1, and the water vapor carryover can be controlled by adjusting the flow rate of the carrier gas and the outlet carrier gas temperature respectively.

[0046] a) Adjust the carrier gas flow plan

[0047] Water vapor flow rate in mixed gas: q 1 =q×c 1 =1000×5%=50mL / min;

[0048] Water vapor flow rate under standard state: q 1,0 =q 1 ×273 / (273+t 1 )=50×273 / 353=38.67 sccm.

[0049] According to the thermodynamic properties of saturat...

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Abstract

The invention discloses a microscale water vapor generating device and method. The microscale water vapor generating device comprises an air distribution system, a vapor generating system and a constant temperature condensation system. The air distribution system, the vapor generating system and the constant temperature condensation system which are installed in the microscale water vapor generating device are mutually independently operated. Each system is connected through an air transporting pipeline, so that the assembly of the device is completed. The installation is easy, and the whole structure is simple. Only the flow of nitrogen and the temperature of thermostatic water bath are needed to be controlled, the water vapor quantity needed by a user can be obtained, and the carrier gasflow and the condensing temperature can be accurately controlled, so the continuous stable supply of micro-flow water vapor can be realized.

Description

technical field [0001] The invention relates to a trace water vapor generating device and method, belonging to the technical field of water vapor generators. Background technique [0002] The traditional steam generator injects distilled water into the evaporator stably through a pump, quickly vaporizes into water vapor and then leaves the evaporator together with the carrier gas. The amount of water vapor generated can be precisely controlled by controlling the injection volume of distilled water. If the required amount of water vapor is small, distilled water will enter the evaporator in the form of water droplets and cannot be continuously injected, so that water vapor cannot be generated stably. [0003] The bubbling method is also a common way of generating water vapor, and the carrying amount of water vapor can be adjusted by changing the flow rate of the carrier gas and the operating temperature of the bubbler. In addition to water vapor, the atomization effect of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/28F22B35/00
CPCF22B1/28F22B35/00
Inventor 张居兵樊红伟张世通李珊珊王昕晔卜昌盛朴桂林卢平
Owner NANJING NORMAL UNIVERSITY
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