Detection apparatus and detection method for formaldehyde concentration in laboratory

A concentration detection and laboratory technology, applied in the field of environmental safety, can solve problems such as high cost, expensive equipment, and long detection cycle, and achieve the effects of short response time, health protection, and high sensitivity

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 formaldehyde concentration detection device in the laboratory capable of quickly and accurately detecting the formaldehyde concentration in the laboratory environment and Detection method

Method used

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  • Detection apparatus and detection method for formaldehyde concentration in laboratory
  • Detection apparatus and detection method for formaldehyde concentration in laboratory
  • Detection apparatus and detection method for formaldehyde concentration in laboratory

Examples

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Embodiment 1

[0077] Such as figure 1 , figure 2 The illustrated embodiment is a formaldehyde concentration detection device in a laboratory, comprising a controller 1, a storage device 25, a base plate 2, an air chamber 3 with a rectangular cross section, an exhaust gas treatment device 28 and a support frame 4 disposed on the base plate, The guide structure 5 and the transverse screw rod 6 arranged on the support frame;

[0078] Such as figure 2As shown, the top of the inner wall of the air chamber is provided with five fans 7 for blowing downward, and the inner and outer walls of the air chamber are provided with two layers of gas-sensitive films 8 and metal wires made of electric heating wires for supporting the gas-sensitive films. Mesh 9, a horizontal partition 10 located at the lower part of the metal mesh and separating the air chamber into upper and lower parts, the bottom of the air chamber is provided with a supporting plate 11, a detection head 13 and a track 12 spirally dis...

Embodiment 2

[0121] In embodiment 2, comprise all structure and step part of embodiment 1, also include in embodiment 2 such as figure 1 The shown temperature sensor 18 and humidity sensor 19 arranged on the detection head; both the temperature sensor and the humidity sensor are electrically connected to the controller.

[0122] Embodiment 2 uses step 200 among the embodiment 1 of following steps:

[0123] (7-1) The controller controls the solenoid valves on the inlet pipe and the outlet pipe to open, and fills nitrogen into the lower part of the air chamber through the inlet pipe, and the temperature sensor, humidity sensor, MQ-2 sensor, MQ-135 sensor and formaldehyde Sensor cleaning for 5 to 10 minutes;

[0124] (7-2) Fill the gas chamber with laboratory gas with a known formaldehyde concentration of S through the air inlet pipe, and the exhaust gas treatment device processes the laboratory gas output from the outlet pipe; after ventilating for 3 to 10 minutes, the controller controls the...

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Abstract

The present invention discloses a detection apparatus and a detection method for the formaldehyde concentration in a laboratory. The detection apparatus comprises a controller, a memory, a bottom plate, a gas chamber arranged on the bottom plate and having a rectangular cross-section, a tail gas treatment device arranged on the bottom plate, a support frame arranged on the bottom plate, a guide structure arranged on the support frame, and a transverse screw rod arranged on the support frame, wherein the top portion of the inner wall of the gas chamber is provided with a plurality of fans for blasting downward, and the inner side wall of the gas chamber wall is sequentially provided with at least two layers of gas sensitive films, a metal mesh for supporting the gas sensitive films and formed by electric heating wires, and a horizontal separation plate positioned on the lower portion of the metal mesh and used for separating the gas chamber into an upper part and a lower part from top to bottom. The apparatus of the present invention has advantages of high sensitivity, good stability, short response time and good formaldehyde selectivity, and can detect the trace formaldehyde gas with the low concentration so as to effectively protect people health.

Description

technical field [0001] The invention relates to the technical field of environmental safety, in particular to a formaldehyde concentration detection device and a detection method in a laboratory capable of rapidly and accurately detecting the formaldehyde concentration in the laboratory environment. Background technique [0002] Formaldehyde is highly toxic and ranks second in the priority list of toxic chemicals in China. It has been identified by the World Health Organization as a carcinogenic and teratogenic substance. It is a recognized source of allergies and one of the potential strong mutagens. . [0003] The lot of documents record, formaldehyde poisoning mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects. Other common symptoms include chest tightness, nausea, skin rashes, and asthma. [0004] At present, the detection method of low-concentration formaldehy...

Claims

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Application Information

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