Dedicated ventilation cabinet used under acid digestion condition in soil heavy metal detection

A technology of digestion conditions and fume hood, applied in measuring devices, cleaning methods and utensils, material analysis through optical means, etc., can solve problems such as skin and respiratory system damage, and achieve the effect of reducing the generation of acid mist

Pending Publication Date: 2018-05-11
徐州市环境监测中心站 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the soil digestion process needs to add a large amount of concentrated acid, and a large amount of acid mist volatilizes during the heating

Method used

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  • Dedicated ventilation cabinet used under acid digestion condition in soil heavy metal detection
  • Dedicated ventilation cabinet used under acid digestion condition in soil heavy metal detection
  • Dedicated ventilation cabinet used under acid digestion condition in soil heavy metal detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the special fume hood under acidic digestion conditions in the detection of heavy metals in soil includes a main body 1 of the fume hood, a monitor 4, a controller 5, a ventilation system 6, a cleaning system 7, a dosing system 8 and a digestion device 9;

[0034] Such as figure 2 and 3 As shown, the cross-section of the main body 1 of the fume hood is inverted convex; the bottom of the main body 1 of the fume hood is provided with a digestion table 13, and a water collection tank 11 is provided around the digestion table 13; There is a drain pipe 12 with a valve k1; the inside wall of the main body of the fume hood 1 is provided with a ventilation slope 2.1, and the angle a between the ventilation slope 2.1 and the horizontal plane of the fume hood main body 1 is 10-80°; the ventilation slope 2.1 and The inner side wall of the fume hood main body 1 encloses a closed area, i.e. the ventilation chamber 2; the ventilation slope 2.1 is provide...

Embodiment 2

[0043] Such as figure 1 As shown, the special fume hood under acidic digestion conditions in the detection of heavy metals in soil includes a main body 1 of the fume hood, a monitor 4, a controller 5, a ventilation system 6, a cleaning system 7, a dosing system 8 and a digestion device 9;

[0044] Such as figure 2 and 3 As shown, the cross-section of the main body 1 of the fume hood is inverted convex; the bottom of the main body 1 of the fume hood is provided with a digestion table 13, and a water collection tank 11 is provided around the digestion table 13; There is a drain pipe 12 with valve k1; the inside wall of the fume hood main body 1 is provided with a ventilating slope 2.1, and the included angle a between the ventilating slope 2.1 and the horizontal plane of the fume hood main body 1 is 30-45°; the ventilating slope 2.1 and The inner side wall of the fume hood main body 1 encloses a closed area, i.e. the ventilation chamber 2; the ventilation slope 2.1 is provide...

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PUM

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Abstract

The invention discloses a dedicated ventilation cabinet used under the acid digestion condition in soil heavy metal detection. The dedicated ventilation cabinet comprises a ventilation cabinet body, amonitor, a controller, a vent system, a cleaning system, an agent adding system and a digestion device. The cross section of the ventilation cabinet body is in a T shape. A digestion table is arranged at the bottom of the ventilation cabinet body, and a water collection tank is arranged around the digestion table. A vent inclined face is arranged on the inner side wall of the ventilation cabinetbody, and the included angle alpha between the vent inclined face and the horizontal plane of the ventilation cabinet body ranges from 10 degrees to 80 degrees. A closed area is defined by the vent inclined face and the inner side wall of the ventilation cabinet body. A monitor camera is mounted at the top in the ventilation cabinet body and electrically connected with the monitor. The dedicated ventilation cabinet mainly solves the problem that in acid smog generated under the acid digestion condition in soil quality monitoring, due to the too large specific gravity, acid liquor drips after being condensed; and through additional mounting of the monitor camera and the monitor, the digestion reacting condition is observed under the condition that a cabinet window is not opened.

Description

technical field [0001] The invention relates to a special fume hood under acid digestion conditions in the detection of heavy metals in soil, and belongs to the technical field of experimental workbenches. Background technique [0002] Existing experimental workbench fume hoods have the following defects under acidic digestion conditions in soil quality monitoring: [0003] 1. In many soil quality monitoring and analysis methods, the hydrochloric acid-nitric acid-hydrofluoric acid-perchloric acid four-acid system is required for pretreatment, so as to completely destroy the mineral lattice of the soil, so that all the elements to be measured in the sample enter the test solution for further analysis. After a large amount of liquid concentrated acid is heated at high temperature, it is converted into acid mist, which is discharged from the room through a fume hood. Due to the heavy specific gravity, the phenomenon of acid condensation and dripping back into the fume hood of...

Claims

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Application Information

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IPC IPC(8): B08B15/02G01N21/84
CPCG01N21/84B08B15/023Y02A50/20
Inventor 徐蕾赵玉林范瑜肖昕刘玉川迟伟伟严蕾
Owner 徐州市环境监测中心站
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