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Detection device and method for volatile methanol in experimental environment

A detection device and laboratory technology, applied in the field of environmental safety, can solve the problems of high cost, long detection cycle, expensive equipment, etc., and achieve the effects of short response time, good health protection and good stability

Inactive Publication Date: 2015-12-09
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to overcome the shortcomings of long detection period, high cost and expensive equipment of the gas detection method in the prior art, and provides a detection device for volatile methanol in the laboratory environment which can quickly and accurately detect the concentration of methanol in the laboratory environment and method

Method used

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  • Detection device and method for volatile methanol in experimental environment
  • Detection device and method for volatile methanol in experimental environment
  • Detection device and method for volatile methanol in experimental environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Such as figure 1 , figure 2 The illustrated embodiment is a detection device for volatile methanol in a laboratory environment, including a controller 1, a memory 25, a base plate 2, an air chamber 3 with a rectangular cross section and a support frame 4 on the base plate, and a support frame 4. The upper guide structure 5 and the transverse screw 6;

[0074] Such as figure 2 As shown, the top of the inner wall of the gas chamber is provided with 5 fans 7 for blowing downward, and the upper part of the gas chamber is provided with a first metal mesh 18 and a second metal mesh 9 made of heating wires, the first metal mesh and the second metal mesh There are 5 gas-sensitive films 8 distributed at intervals between the nets. The gas chamber at the bottom of the second metal mesh is provided with a horizontal partition 10 for separating the gas chamber into upper and lower parts. The head 13 and the track 12 that is helically distributed along the upper surface of the ...

Embodiment 2

[0116] Embodiment 2 includes all structures and steps in Embodiment 1, and Embodiment 2 replaces step 100 in Embodiment 1 with the following steps:

[0117] Step 110, sensor cleaning

[0118] The controller controls the solenoid valves on the inlet pipe and the outlet pipe at the lower part of the air chamber to open, fill the lower part of the air chamber with clean air through the inlet pipe, and clean the MQ-2 sensor, MQ-135 sensor and methanol sensor for 10 minutes;

[0119] Step 120, sensor calibration

[0120] Fill the lower part of the air chamber with laboratory gas with a known methanol concentration of S through the inlet pipe, and the ventilation time is 200 seconds. The controller controls the solenoid valves on the inlet pipe and the outlet pipe at the lower part of the air chamber to close;

[0121] The controller drives the detection head to move along the track through the second motor, the MQ-2 sensor, MQ-135 sensor and methanol sensor detect gas signals, and...

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Abstract

The invention discloses a detection device and method for volatile methanol in an experimental environment. The detection device comprises a controller, a memory, and a bottom board, a gas chamber with a rectangular cross section and a support frame that are arranged on the bottom board, and a guide structure and a transverse screw rod that are disposed on the support frame. The gas chamber inner wall top is equipped with several fans for blowing air downward, the upper part of the gas chamber is internally equipped with a first metal net and a second metal net that are composed of heating wires, several gas sensitive films in interval distribution are arranged between the first metal net and the second metal net, the gas chamber below the second metal net is internally provided with a horizontal partition plate dividing the gas chamber into an upper part and a lower part, and a detection head is provided with an MQ-2 sensor, an MQ-135 sensor and a methanol sensor. The detection device and method provided by the invention have the characteristics of high sensitivity, good stability and short response time, good selectivity to methanol, detectability of lower concentration trace methanol gas, and effective guarantee of people's health.

Description

technical field [0001] The invention relates to the technical field of environmental safety, in particular to a device and method for detecting volatile methanol in a laboratory environment capable of rapidly and accurately detecting the concentration of methanol in the laboratory environment. Background technique [0002] The toxicity of methanol has the greatest impact on the nervous system and blood system of the human body. It will produce toxic reactions if it is ingested through the digestive tract, respiratory tract or skin. Methanol vapor can damage the human respiratory mucosa and vision. [0003] The symptoms of acute poisoning are: headache, nausea, stomach pain, fatigue, blurred vision and even blindness, and then difficulty breathing, eventually leading to paralysis of the respiratory center and death. Chronic poisoning reactions include: dizziness, lethargy, headache, tinnitus, vision loss, and digestive disorders. [0004] At present, the detection method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N35/00
Inventor 汤旭翔刘福奇王莎莎陈赛陈柳柳曹海洋
Owner ZHEJIANG GONGSHANG UNIVERSITY
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