CN203259376U

CN203259376U - Mixed type VOC (Volatile Organic Compounds) sampling pipe

Info

Publication number: CN203259376U
Application number: CN 201320146576
Authority: CN
Inventors: 霍兴宣; 张钦敏; 王凤兵
Original assignee: SHENZHEN SHIBIAO DETECTION Co Ltd
Current assignee: SHENZHEN SHIBIAO DETECTION Co Ltd
Priority date: 2013-03-27
Filing date: 2013-03-27
Publication date: 2013-10-30
Anticipated expiration: 2023-03-27

Abstract

The utility model relates to a mixed type VOC (Volatile Organic Compounds) sampling pipe which comprises an air pipe, filled cocoanut active charcoal, silica gel, a Tenax-TA adsorbing agent, glass wool or polyurethane foaming plastic and a spring steel wire, wherein the air pipe is made of glass or stainless steel, rubber plugs are matched with two ends of the air pipe, fillers comprise the cocoanut active charcoal, the silica gel and the Tenax-TA adsorbing agent which are filled from top to bottom, the glass cotton or polyurethane foaming plastic is placed between the two kinds of fillers and outside the fillers, and the spring steel wire is fixed at the glass cotton or polyurethane foaming plastic outside the filler. The three fillers of the cocoanut active charcoal, the silica gel and the Tenax-TA adsorbing agent are mixed and filled according to a certain proportion and sequence and are made into the mixed type VOC sampling pipe, which is used for collecting VOC in ambient air and waste gas samples.

Description

A kind of mixed type VOC sampling pipe

Technical field

The utility model relates to the air and wasteair detection field, is specifically related to a kind of mixed type VOC sampling pipe.

Background technology

In recent years, the environmental monitoring technology development, various sampling pipes constantly produce, and mainly contain two kinds of the solvent analysis type and hot analytical types, but hot analytical type sampling pipe filler is more single, all only makes adsorbent with Tenax-TA, and sample effect is not obvious.Through investigation, only make adsorbent with Tenax-TA, all more intense to the absorption of a lot of VOC components, but relatively poor to the adsorption effect of benzene.Domestic have document to point out: when making adsorbent collection gas with Tenax-TA, phenomenon appears spilling in benzene, when sampling volume changes to 10L from 3L, the recovery drops to 60.09% from 101.69%, same sampling condition, when sampling volume was 10L, activated charcoal greater than 95%, illustrated that the collection of benzene should not substitute acticarbon with the Tenax-TA adsorbent to the recovery of benzene.

The utility model content

The purpose of this utility model is to provide a kind of mixed type VOC sampling pipe, solves sample and adsorb incomplete problem in gatherer process.

The technical solution of the utility model is such:

A kind of mixed type VOC sampling pipe, comprise: blank pipe, be arranged on the spring steel wire at the inboard two ends of blank pipe and be arranged on filler between the spring steel wire: described filler is respectively Tenax-TA adsorbent, silica gel and cocoanut active charcoal from the bottom to top, separates by glass wool or polyurethane foam plastics between described Tenax-TA adsorbent and the described silica gel and between described silica gel and the described cocoanut active charcoal.

Further: the cocoanut active charcoal in the described filler: silica gel: the mass ratio of Tenax-TA adsorbent is 1: 1: 2, and general total amount is 200mg.

Further: the cocoanut active charcoal pipe in the described filler is crossed 40 mesh sieves, and the Tenax-TA adsorbent is crossed 80 mesh sieves.

Further: described silica gel is the 6mm particle diameter, high temperature resistant type.

The beneficial effects of the utility model: the filler of mixed type VOC sampling pipe is respectively Tenax-TA adsorbent, silica gel and cocoanut active charcoal from the bottom to top, and part by weight is 2: 1: 1.The purpose that adds cocoanut active charcoal is best to the adsorption effect of the benzene in the VOC component, adds the silica gel purpose and then is the component such as methyl alcohol silica gel adsorption is had selectivity.In order to fix the filler of the inside, two ends have added spring steel wire in the pipe, for various fillers in the convenient optionally take-off pipe, have all added glass wool between the filler or polyurethane foam plastics separates.This mixed type VOC sampling pipe preparation process is simple, and absorption property is good, and required filler price is not high.Demand is large aspect environmental monitoring, no matter is in factory's audit, the acceptance of work, and the air monitering aspect can both meet the demands in room air monitoring and the car.

Description of drawings

Fig. 1 is wiring layout of the present utility model.

Among the figure: 1, cocoanut active charcoal; 2, silica gel; 3, Tenax-TA adsorbent; 4, glass wool or polyurethane foam plastics; 5, spring steel wire.

Embodiment

In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

With reference to figure 1, the said a kind of mixed type VOC sampling pipe of the utility model comprises:

Blank pipe is arranged on the spring steel wire 5 at the inboard two ends of blank pipe and is arranged on filler between the spring steel wire 5.Filler is respectively Tenax-TA adsorbent 3, silica gel 2 and cocoanut active charcoal 1 from the bottom to top.Separate by glass wool or polyurethane foam plastics 4 between Tenax-TA adsorbent 3 and the silica gel 2 and between silica gel 2 and the cocoanut active charcoal 1.

In the present embodiment, cocoanut active charcoal 1: the mass ratio of silica gel 2:Tenax-TA adsorbent 3 is 1: 1: 2, and general total amount is 200mg.

Cocoanut active charcoal 1, directly buy commercial, buy the checking its absorption property, silica gel 2 is the 6mm particle diameter, high temperature resistant type.Cocoanut active charcoal 1 is crossed 40 mesh sieves, and Tenax-TA adsorbent 3 is crossed 80 mesh sieves, its role is to guarantee the even of filler.

Use the airintake direction of this mixed type VOC collected specimens and analytic sample to want opposite, need pyroprocessing before the use and verify the adsorbent background with gas chromatograph, the assurance sampling pipe is blank, need to verify equally after having analyzed sample, prepares for next time sampling recycles.Note avoiding sampling pipe water inlet or moisture absorption during sampling, gathering complete post-sampling pipe two ends need seal.

In the present embodiment, the purpose that adds cocoanut active charcoal 1 is best to the adsorption effect of the benzene in the VOC component, adds silica gel 2 purposes and then is the component such as methyl alcohol silica gel adsorption is had selectivity.In order to fix the filler of the inside, two ends have added spring steel wire 5 in the pipe, for various fillers in the convenient optionally take-off pipe, have all added glass wool between the filler or polyurethane foam plastics 4 separates.This mixed type VOC sampling pipe preparation process is simple, and absorption property is good, and required filler price is not high.Demand is large aspect environmental monitoring, no matter is in factory's audit, the acceptance of work, and the air monitering aspect can both meet the demands in room air monitoring and the car.

The above only is preferred embodiment of the present utility model, not in order to limiting the utility model, all any modifications of doing within spirit of the present utility model and principle, is equal to and replaces and improvement etc., all should wrap in the utility model scope.

Claims

1. one kind is used for mixed type VOC sampling pipe, comprise: blank pipe, be arranged on the spring steel wire at the inboard two ends of blank pipe and be arranged on filler between the spring steel wire, it is characterized in that: described filler is respectively Tenax-TA adsorbent, silica gel and cocoanut active charcoal from the bottom to top, separates by glass wool or polyurethane foam plastics between described Tenax-TA adsorbent and the described silica gel and between described silica gel and the described cocoanut active charcoal.

2. a kind of mixed type VOC sampling pipe as claimed in claim 1, it is characterized in that: the cocoanut active charcoal in the described filler: silica gel: the mass ratio of Tenax-TA adsorbent is 1: 1: 2, general total amount is 200mg.

3. a kind of mixed type VOC sampling pipe as claimed in claim 2, it is characterized in that: described cocoanut active charcoal is crossed 40 mesh sieves, and the Tenax-TA adsorbent is crossed 80 mesh sieves.

4. a kind of mixed type VOC sampling pipe as claimed in claim 2, it is characterized in that: described silica gel is the 6mm particle diameter, high temperature resistant type.