CN104597067A - All-phase detection device for metals in gas, and working method of all-phase detection device for metals in gas - Google Patents
All-phase detection device for metals in gas, and working method of all-phase detection device for metals in gas Download PDFInfo
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- CN104597067A CN104597067A CN201410854865.4A CN201410854865A CN104597067A CN 104597067 A CN104597067 A CN 104597067A CN 201410854865 A CN201410854865 A CN 201410854865A CN 104597067 A CN104597067 A CN 104597067A
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Abstract
The invention provides an all-phase detection device for metals in a gas, and an all-phase detection method for metals in the gas. The detection device comprises a sampling module and a first detection module, and further comprises a filter module, a moving module, an absorbing module, a conveying module and a second detection module, wherein the filter module is arranged on a gas channel of the sampling module and is used for intercepting solid-phase metals in the gas, and the moving module is used for moving the filter module intercepting the solid-phase metals to a detection region of the first detection module; the absorbing module comprises an absorbing medium and is used for absorbing gas-phase metals in the gas passing through the filter module, and the conveying module is used for conveying the absorbing medium absorbing the gas-phase metals to a detection region of the second detection module; the second detection module is used for detecting the gas-phase metals in the absorbing medium. The detection device provided by the invention realizes the all-phase detection of heavy metals in the gas.
Description
Technical field
The present invention relates to gas detect, particularly the full phase pick-up unit of metal and method of work thereof in gas.
Background technology
Heavy metal can not be biodegradable, but can under the biological magnification of food chain, and thousands of hundreds of times ground enrichment, finally enters human body.Heavy metal in human body can and protein and various enzyme there is strong interaction, make them lose activity, also may enrichment in some organ of human body, if exceed the tolerant limit of human body, human body can be caused poisoning, very large harm is caused to human body.
At present for the detection of flue gas heavy metal, after general employing hand sampling, send into the off-line method of lab analysis.The domestic sampling to flue gas heavy metal is the particle gathered by filter cylinder or filter membrane in flue gas mostly, then filter cylinder or filter membrane sample being sent into laboratory utilizes the laboratory analysis methodologies such as ICP-MS, ICP-AES to carry out heavy metal analysis, does not detect the gas phase heavy metal in flue gas.The external sampling to flue gas heavy metal, the particle in flue gas is not gathered by means of only filter cylinder or filter membrane, the absorption condensation device of specific absorption solution is also provided with at filter cylinder or filter membrane rear end, be used for gathering the vapor phase contaminants in flue gas, then the solution acquiring the filter cylinder of particle or filter membrane and absorb vapor phase contaminants is sent into laboratory together to detect, achieve the detection to solid phase and gas phase particle.
The above-mentioned detection method to flue gas heavy metal is all send into the off-line analysis method of lab analysis after sampling, cannot accomplish the on-line monitoring to flue gas heavy metal concentration.The flue gas heavy metal continuous monitor system detected based on isokinetic sampling, pipeline companion heat, film enrichment, XRF can carry out on-line measurement to the vertical distribution in flue gas particles, but gaseous state (only having solid-state and gaseous state under the high temperature companion enthusiasm condition) heavy metal that also cannot detect in flue gas and other polluters.
Summary of the invention
In order to solve the deficiency in above-mentioned prior art, the invention provides the full phase pick-up unit of metal in a kind of gas of low cost.
The object of the invention is to be achieved through the following technical solutions:
The full phase pick-up unit of metal in a kind of gas, described pick-up unit comprises sampling module, first detection module; Described pick-up unit comprises further:
Filtering module, described filtering module is arranged on the gas passage of described sampling module, for solid metallic in entrap gas;
Mobile module, described mobile module is used for the surveyed area filtering module retaining solid metallic being moved to described first detection module;
Absorption module, described absorption module comprises absorbing medium, for absorbing the vapor phase metal in the gas after by described filtering module;
Delivery module, the absorbing medium absorbing vapor phase metal is sent to the surveyed area of the second detection module by described delivery module;
Second detection module, described second detects for detecting the vapor phase metal in absorbing medium.
Present invention also offers the method for work of above-mentioned detection device.This goal of the invention is achieved through the following technical solutions:
The method of work of above-mentioned pick-up unit, described method of work comprises the following steps:
(A1) sampling module gas sampled, and send in gas passage;
(A2) solid metallic in filtering module filtering gas passage in gas, solid metallic is collected on described filtering module, enters step (A5);
(A3) gas through described filtering module enters in absorption module, and the vapor phase metal in gas is absorbed by absorbing medium;
(A4) surveyed area absorbing medium being transported to detection module detects, thus knows vapor phase metal content;
(A5) surveyed area that filtering module moves to detection module detects, thus knows solid metallic content.
Compared with prior art, the beneficial effect that the present invention has is:
1, two step method achieves heavy metal contaminants in gas and entirely detects mutually: first use the solid metallic in filtrator entrap gas, then absorbs the vapor phase metal in gas with absorbing medium, thus achieves and entirely detect mutually;
2, cost is low: only use a set of on-line measuring device, achieves the on-line monitoring to solid phase heavy metal and gas phase heavy metal in flue gas, low cost.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art it is easily understood that: these accompanying drawings only for illustrating technical scheme of the present invention, and and are not intended to be construed as limiting protection scope of the present invention.In figure:
Fig. 1 is the structure diagram of the full phase pick-up unit of heavy metal in the gas according to the embodiment of the present invention 1;
Fig. 2 is the structure diagram of the full phase pick-up unit of heavy metal in the gas according to the embodiment of the present invention 1.
Embodiment
Fig. 1-2 and following description describe Alternate embodiments of the present invention and how to implement to instruct those skilled in the art and to reproduce the present invention.In order to instruct technical solution of the present invention, simplifying or having eliminated some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace will within the scope of the invention.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present invention in every way.Thus, the present invention is not limited to following Alternate embodiments, and only by claim and their equivalents.
Embodiment 1:
Fig. 1 schematically illustrates the structure diagram of the full phase pick-up unit of heavy metal in the gas of the embodiment of the present invention, and as shown in Figure 1, described pick-up unit comprises:
Sampling module 11, described sampling module comprises the sampling probe stretched in chimney, sampling conduit;
Filtering module, described filtering module adopts filter membrane 21, is arranged on the gas passage of described sampling module, for solid metallic in entrap gas;
Mobile module, comprises driving wheel 23, engaged wheel 22, and the solid metallic that filter membrane retains, around on described driving wheel, engaged wheel, by the rotation of driving wheel, is moved to the surveyed area of detection module by the two ends of described filter membrane;
Absorption module, described absorption module comprises closed container 31, absorbing liquid, the end of described sampling conduit 41 is in described absorbing liquid, and aspiration pump 51 is communicated with the upper space of absorbing liquid in described closed container, and absorbing liquid is for absorbing the gas phase heavy metal in the gas after by described filtering module;
Delivery module, described delivery module comprises transfer canal, sample cup 81, delivery unit 91 and peristaltic pump 82, and the two ends of described transfer canal are communicated with absorbing liquid, sample cup in described closed container respectively; Sample cup is airtight, inlet communication transfer canal, outlet peristaltic pump; Delivery unit is used for being sent into by described sample cup and pulling out described surveyed area;
XRF detection module 71, for detecting the vapor phase metal in absorbing liquid, the solid phase heavy metal be collected on filter membrane;
Transfer canal between sample cup and closed container is provided with shut-off valve and T-valve, T-valve is communicated with service sink 92, and service sink is built with cleaning fluid.
The method of work of above-mentioned detection device, described method of work comprises the following steps:
(A1) aspiration pump work, the flue gas in chimney enters in sampling conduit by probe;
(A2) the solid phase heavy metal in membrane filtration sampling conduit in flue gas, solid phase heavy metal is collected on described filter membrane, enters step (A5);
(A3) flue gas through described filter membrane enters in closed container, and the vapor phase metal in gas is absorbed by liquid absorption;
(A4) under the suction of peristaltic pump, partially absorb liquid and deliver in sample cup, the surveyed area that sample cup is sent into XRF detection module by delivery unit detects, thus knows vapor phase metal content; Afterwards sample cup is shifted out surveyed area;
(A5) under the driving of driving wheel, the surveyed area that gathering has the filter membrane of solid phase heavy metal to move to XRF detection module detects, thus knows solid metallic content;
(A6) close shut-off valve, T-valve is communicated with sample cup and cleaning fluid, by peristaltic pump pumps part cleaning fluid cleaning sample cup.
Embodiment 2:
Fig. 2 schematically illustrates the structure diagram of the full phase pick-up unit of heavy metal in the gas of the embodiment of the present invention, and as shown in Figure 2, described pick-up unit comprises:
Sampling module 11, described sampling module comprises the sampling probe stretched in chimney, sampling conduit;
Filtering module, described filtering module adopts filter membrane 21, is arranged on the gas passage of described sampling module, for solid metallic in entrap gas;
Mobile module, comprises driving wheel 23, engaged wheel 22, and the solid metallic that filter membrane retains, around on described driving wheel, engaged wheel, by the rotation of driving wheel, is moved to the surveyed area of detection module by the two ends of described filter membrane;
Absorption module, described absorption module comprises closed container 31, absorbing liquid, the end of described sampling conduit is in described absorbing liquid, and aspiration pump is communicated with the upper space of absorbing liquid in described closed container, and absorbing liquid is for absorbing the gas phase heavy metal in the gas after by described filtering module;
Delivery module, described delivery module comprises transfer canal, sprayer 61 and peristaltic pump 62, and the two ends of described transfer canal are communicated with absorbing liquid, sprayer in described closed container respectively;
XRF detection module 71, for detecting the vapor phase metal in absorbing liquid, the solid phase heavy metal be collected on filter membrane;
Transfer canal between sample cup and closed container is provided with shut-off valve and T-valve, T-valve is communicated with service sink, and service sink is built with cleaning fluid.
The method of work of above-mentioned detection device, described method of work comprises the following steps:
(A1) aspiration pump work, the flue gas in chimney enters in sampling conduit by probe;
(A2) the solid phase heavy metal in membrane filtration sampling conduit in flue gas, solid phase heavy metal is collected on described filter membrane, enters step (A5);
(A3) flue gas through described filter membrane enters in closed container, and the vapor phase metal in gas is absorbed by liquid absorption;
(A4) under the suction of peristaltic pump, partially absorb liquid and deliver in sprayer, absorbing liquid is sprayed on the surveyed area on filter membrane by sprayer, and XRF detection module detects, thus knows vapor phase metal content;
(A5) under the driving of driving wheel, the surveyed area that gathering has the filter membrane of solid phase heavy metal to move to XRF detection module detects, thus knows solid metallic content;
(A6) close shut-off valve, T-valve is communicated with sample cup and cleaning fluid, by peristaltic pump pumps part cleaning fluid cleaning sample cup.
Claims (8)
1. the full phase pick-up unit of metal in gas, described pick-up unit comprises sampling module, first detection module; It is characterized in that: described pick-up unit comprises further:
Filtering module, described filtering module is arranged on the gas passage of described sampling module, for solid metallic in entrap gas;
Mobile module, described mobile module is used for the surveyed area filtering module retaining solid metallic being moved to described first detection module;
Absorption module, described absorption module comprises absorbing medium, for absorbing the vapor phase metal in the gas after by described filtering module;
Delivery module, the absorbing medium absorbing vapor phase metal is sent to the surveyed area of the second detection module by described delivery module;
Second detection module, described second detects for detecting the vapor phase metal in absorbing medium.
2. pick-up unit according to claim 1, is characterized in that: described mobile module comprises:
Driving wheel and engaged wheel, the two ends of described filtering module are respectively around on described driving wheel, engaged wheel.
3. pick-up unit according to claim 1, is characterized in that: described absorption module comprises:
Closed container, absorbing liquid, described absorbing liquid is contained in described closed container; Entered in described absorbing liquid by the gas after filtering module.
4. pick-up unit according to claim 1, is characterized in that: described delivery module comprises:
Pipeline, the two ends of described pipeline are communicated with described absorbing liquid, sample cup respectively;
Sample cup;
Delivery unit, described delivery unit is used for being sent into by described sample cup and pulling out described surveyed area;
Pump unit, described pump unit is used for the absorbing liquid in closed container to deliver in described sample cup.
5. pick-up unit according to claim 1, is characterized in that: described filtering module comprises:
Filter membrane, described filter membrane is used for the solid metallic in entrap gas.
6. pick-up unit according to claim 1, is characterized in that: described delivery module comprises:
Pipeline, the two ends of described pipeline are communicated with described absorbing liquid, sprayer respectively;
Sprayer;
Pump unit, described pump unit is used for the absorbing liquid in closed container to deliver in described sample cup.
7. pick-up unit according to claim 1, is characterized in that: described first detection module and the second detection module are same module.
8., according to the method for work of the arbitrary described pick-up unit of claim 1-7, described method of work comprises the following steps:
(A1) sampling module gas sampled, and send in gas passage;
(A2) solid metallic in filtering module filtering gas passage in gas, solid metallic is collected on described filtering module, enters step (A5);
(A3) gas through described filtering module enters in absorption module, and the vapor phase metal in gas is absorbed by absorbing medium;
(A4) surveyed area absorbing medium being transported to detection module detects, thus knows vapor phase metal content;
(A5) surveyed area that filtering module moves to detection module detects, thus knows solid metallic content.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410854865.4A CN104597067A (en) | 2014-12-31 | 2014-12-31 | All-phase detection device for metals in gas, and working method of all-phase detection device for metals in gas |
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| CN201410854865.4A CN104597067A (en) | 2014-12-31 | 2014-12-31 | All-phase detection device for metals in gas, and working method of all-phase detection device for metals in gas |
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| CN104597067A true CN104597067A (en) | 2015-05-06 |
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Cited By (1)
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| CN105866153A (en) * | 2016-03-31 | 2016-08-17 | 北方工业大学 | Atmosphere heavy metal detection system |
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