CN109596546A - Mercury filters eliminating machine by washing, mercury analyzer and analysis method - Google Patents
Mercury filters eliminating machine by washing, mercury analyzer and analysis method Download PDFInfo
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- CN109596546A CN109596546A CN201811537356.3A CN201811537356A CN109596546A CN 109596546 A CN109596546 A CN 109596546A CN 201811537356 A CN201811537356 A CN 201811537356A CN 109596546 A CN109596546 A CN 109596546A
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- washing
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- eliminating machine
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
Abstract
The invention discloses a kind of mercury to filter eliminating machine by washing, mercury analyzer and analysis method, the mercury filtering eliminating machine by washing includes gas-guide tube, metal ball, block piece and positioning pipe, metal ball is medicine ball made of being mixed as wire winding, wire is that can form amalgam with mercury to the metal of Adsorption of Mercury, metal ball accumulation is filled in gas-guide tube and block piece is used to block the build-up areas both ends in metal ball to prevent metal ball slump, to form the filter layer of mercury, block piece is made of the material of interfering substance in not adsorption gas flow, positioning pipe is arranged in the two-port of gas-guide tube, to prevent filter layer loose and movement.Present invention solid metal ball made of the wire winding that can generate amalgam with mercury is mixed, its rough surface, large specific surface area, gap guarantee mercury between metal ball and metal ball also ensures that air-flow passes through filter layer while capable of coming into full contact with metal ball, and the absorption especially suitable for the mercury in gas containing high concentration is enriched with.
Description
Technical field
The present invention relates to the monitoring analysis technical fields of mercury, particularly, are related to a kind of mercury filtering eliminating machine by washing.In addition, this hair
It is bright to further relate to a kind of mercury analyzer and analysis method.
Background technique
Mercury and mercuric compounds are due to characteristics such as high volatile, bioaccumulation and very strong neuron excitotoxicities, increasingly
By the concern in worldwide.Coal-burning power plant is one of main artificial mercury emissions source, accounts for the one third of anthropogenic discharge,
And the mercury being discharged after treatment, mainly it is present in atmosphere in the form of mercury vapour, by accumulating for a long time, mercury can be because of life
Object enriching enters in food chain, causes mercury poisoning.Just because of the hypertoxicity of mercury, so can effectively facilitate monitoring and analysis mercury
Concentration have very important significance.
In the existing various methods for surveying mercury, the most commonly used is cold atomic absorption spectrometry and Cold Atomic Fluorescent Mercury spectrum
Method.Wherein cold atomic absorption spectrometry is to convert elemental mercury for the mercury of titanium oxide in the flue gas of sampling by pretreatment system
Afterwards, mercury content is determined to the absorption at specific radiation by measurement mercury.But this measurement method, the other compositions in flue gas
(such as SO2) can also carry out ultraviolet light absorbing the decaying in turn resulting in luminous energy, and this result leads to the content monitoring to mercury not
Accurately.
In order to realize that the accurate measurements to the content of mercury, patent CN102435549A disclose a kind of flue gas mercury analyzer,
It is each passed through measuring cell and reference cell by dual-beam, and flue gas pipeline sequentially passes through measuring cell and reference cell, and flue gas is being run
During by being absorbed when mercury absorber between measuring cell and reference cell, the light that measuring cell is arranged in is pierced by the of side
One photoelectric sensor is detected to light is pierced by, which issues measuring signal, and the light that reference cell is arranged is worn
Second photoelectric sensor of side out is issued signal by the induction that reference cell is pierced by light, and central processing unit receives measuring signal
With difference processing is carried out to the two after reference signal after obtain mercury concentration, however existing mercury absorber to the adsorption efficiency of mercury and
Adsorption effect is poor, and when especially mercury content is high, absorber is easily saturated or is the failure to fully absorb in gas
Mercury leads to the mercury content inaccuracy for measuring.Therefore it provides the mercury filtering that a kind of mercury adsorption efficiency is high, adsorption effect is good is washed away
Device is extremely important to the monitoring analysis of mercury in gas.
Summary of the invention
The present invention provides a kind of mercury to filter eliminating machine by washing, with solve existing mercury filtering eliminating machine by washing Adsorption of Mercury low efficiency,
The technical problem of adsorption effect difference.The present invention also provides a kind of mercury analyzer and analysis methods, to solve existing mercury analysis
The technical problem of instrument poor anti jamming capability, mercury concentration monitor inaccuracy.
According to an aspect of the present invention, a kind of mercury filtering eliminating machine by washing is provided, including gas-guide tube, metal ball, block piece and
Positioning pipe, the metal ball be as wire winding mix made of medicine ball, the wire be can with mercury formed amalgam from
And the metal of Adsorption of Mercury, the metal ball accumulation are filled in the gas-guide tube and are blocked using the block piece in the metal
The build-up areas both ends of ball are to prevent the metal ball slump, to form the filter layer of mercury, the block piece is used and do not adsorbed
The material of interfering substance in air-flow is made, and the positioning pipe is arranged in the two-port of the gas-guide tube, described for preventing
Filter layer is loose and mobile.
Mercury filtering eliminating machine by washing usually adsorbs mercury with gold.Common gold filler is spun gold cake, gold powder, gold
Particle or gold-plated quartz sand.And the filling mode of golden filler has very big influence to the bioaccumulation efficiency of mercury and concentration effect,
Especially the adsorption efficiency of high concentration mercury vapour and adsorbance are influenced very big.It is filled using spun gold cake, to the mercury of high concentration
The filter efficiency of steam is very low, and about only 20%；The adsorption capacity of gold-plated quartz sand is lower and is easily saturated；And gold powder
Though there is very high bioaccumulation efficiency at end to mercury, the inhibition of gold powder foot couple air-flow is very big, and mercury vapour is difficult by going, to adopting
The performance of sample pump has very big requirement, while long-term negative pressure operation is also unfavorable for the service life of air pump；The cost of gold granules is very
Height, and particle surface is relatively smooth, specific surface area is lower, is unfavorable for the enrichment of mercury.The present invention using can with mercury generate amalgam from
And the wire of Adsorption of Mercury winds the solid metal ball made of mixing, solid metal more much smaller than the diameter of snorkel
Ball accumulation be filled in gas-guide tube and use block piece build-up areas both ends of the closure in metal ball with prevent metal ball slump from
And form filter layer Adsorption of Mercury, as metal ball be as wire winding mix made of medicine ball, have both spun gold sand and gold
The advantages of clusters, metal ball surface is very coarse and there are many small gaps between wire and wire, this makes
The specific surface area for obtaining metal ball is very big, and big specific surface area is conducive to the enrichment of mercury.Meanwhile the accumulation filling of metal ball
So that existing gap keeps vapour lock lower between metal ball and metal ball, guarantee also to protect while mercury can come into full contact with metal ball
Having demonstrate,proved mercury vapour can pass through without by too big obstruction, therefore, mercury filtering eliminating machine by washing of the invention is especially suitable for gas
In the mercury containing high concentration absorption enrichment.
The both ends of filter layer are provided with block piece, and the block piece uses the material system of interfering substance in not adsorption gas flow
At, the material mercury content can will not be interfered and influenced by block piece to test sample gas with Adsorption of Mercury or not Adsorption of Mercury
The accuracy of result is tested and analyzed, one side block piece plays the role of limit to the metal ball of filling, prevents accumulation from filling
Metal ball is collapsed and is fallen off, on the other hand, block piece can also primary filtration fall the large particulate matter in sample gas, guarantee entered
The gas of filter eliminating machine by washing does not have the interference of particulate matter and pollution.Positioning pipe is set on the outside of block piece again, fills metal ball and resistance
After block piece, positioning pipe can be inserted, metal ball and block piece are limited, prevents metal ball and block piece mobile.
Further, the metal is one or more of gold, platinum, silver, nickel, titanium.The metals such as gold, platinum, silver, nickel, titanium
Amalgam substance can be generated with mercury, so that mercury be filtered out from air-flow, it is preferable that the metal is gold, spun gold made of spun gold
Ball is optimal to the adsorption effect of mercury.
Further, the metal ball can be various shape, such as spheroidal, elliposoidal, polygonal, irregular shape etc.,
Metal ball is mixed using wire winding, and shape can be unrestricted, forms filtering as long as can be filled into gas-guide tube
Layer.
Further, the radial dimension of the metal ball is 0.2~3 ㎜.Preferably, the radial dimension of the metal ball is
0.2~1mm.
In order to reach big specific surface area, keep the adsorption effect of metal ball more preferable, the radial dimension of the metal ball is unsuitable
It is excessive, to be less than the diameter of gas-guide tube as far as possible, metal ball dense accumulation in gas-guide tube fills the filter layer to form mercury.Gas master
To circulate between metal ball and metal ball, size too it is big waste material while make filling metal ball quantity it is on the low side, gas
The metal ball surface area of body contact is less than normal, influences adsorption efficiency, and waste material.Therefore, the radial dimension of metal ball is preferably
0.2~1mm.
Further, the diameter of the wire is 0.01~0.3mm, described to be wound up as intensively winding.Preferably, described
The diameter of wire is 0.05~0.1mm.
The diameter of wire slightly makes very much the metal ball surface roughness of winding not high, and specific surface area reduces, while soft
Gap is too big between metal ball wire, gas by when the path passed through it is shorter, the area of contact is smaller, is all unfavorable for mercury
Absorption, in general, the thinner the diameter of spun gold the better, and winding is appropriate intensive, to obtain the metal ball of large specific surface area.
Further, heater strip is laid on the outside of the gas-guide tube.
It is laid with heater strip on the outside of gas-guide tube, after metal ball Adsorption of Mercury reaches saturation, needs to solve metal ball
Analysis regeneration, heater strip heat gas-guide tube, make the mercury adsorbed by metal ball parsing, blow out gas-guide tube by carrier gas stream.
Further, the mercury filtering eliminating machine by washing further includes shell, and the gas-guide tube is arranged in shell.
Gas-guide tube is arranged in shell, uses the gas-guide tube for having laid heater strip safer, convenient, facilitate by
Mercury filtering eliminating machine by washing be installed in other equipment carry out using.
Further, the gas-guide tube and positioning pipe are quartz ampoule.Adsorption of Mercury will not be corroded quartz ampoule by mercury, fixed
Position pipe compresses silica wool and metal ball in addition to rising, and outside the effect for preventing filter house from shifting, is set as tubulose, will not influence
Air-flow passes through.Certainly, gas-guide tube and positioning pipe can also Adsorption of Mercury will not be made by the material that mercury corrodes using other.
Further, the block piece is silica wool, spun gold cake or spun gold pine group.Silica wool not Adsorption of Mercury, is not also adsorbed
Interfering substance in air-flow, spun gold cake or spun gold pine group can Adsorption of Mercury, but not the interfering substance in adsorption gas flow, air-flow
Silica wool, spun gold cake or spun gold pine group can be passed through.
According to another aspect of the present invention, additionally provide a kind of mercury analyzer comprising above-mentioned mercury filtering eliminating machine by washing and
Detection unit, the detection unit include at least two detection pipes, and the detection pipe is connected to the branch in parallel of sample gas pipeline
On line, the mercury filtering eliminating machine by washing is arranged on a wherein branch line for sample gas pipeline.
The filtering eliminating machine by washing that mercury analyzer of the invention uses solid metal ball made of wire winding is mixed is made
For the filler of Adsorption of Mercury, the interference gas such as SO2, NO will not be adsorbed, detection unit includes at least two detection pipes, detection method
For cold atom spectrophotometry generally in the art, one of detection pipe is used to test sample gas, obtains sample gas spectrum, another
Detection pipe is used to detect the background gas that mercury has been washed away in filtering, obtains background spectra, since there is no the interference of the gases such as SO2, NO, originally
The background spectra that the mercury analyzer of invention measures is more acurrate, thus also more acurrate by the concentration for analyzing obtained mercury.
Further, the number of the mercury filtering eliminating machine by washing is one；Or the number of the mercury filtering eliminating machine by washing is two,
Two mercury filtering eliminating machine by washing are arranged in parallel.
Two mercury filtering eliminating machine by washing are arranged in parallel, can one of mercury filtering eliminating machine by washing absorption enrichment mercury when, in addition one
It is a to carry out parsing regeneration, mercury filtering eliminating machine by washing can be recycled, mercury filtering eliminating machine by washing remains at optimal filtering absorption
State is not in filter efficiency decline or the case where needing replacing consumptive material of failing.
Further, the mercury analyzer further includes gas mercury pretreatment unit, the gas mercury pretreatment unit setting
In the front end of the sample gas pipeline, the gas mercury pretreatment unit includes high-temperature heating equipment and temperature control equipment；It is described
Gas flow pipe is provided in high-temperature heating equipment, the first end of the gas flow pipe connects sample gas gas source, the gas
The second end of runner pipe is connected with mixing tube, and the diameter of the mixing tube is greater than the diameter of the gas flow pipe, the mixing
Pipe connects the sample gas pipeline, and the temperature control equipment connects the high-temperature heating equipment, for controlling the high-temperature heating
Heating temperature inside device.
The mercury discharged in flue gas there are three kinds of element mercury, bivalent mercury and particle mercury forms, the detection pipe of mercury analyzer without
Method detects bivalent mercury, needs that the bivalent mercury in flue gas is first reduced to element mercury, could be detected test tube detection and analysis, because
This mercury concentration handled without gas mercury pretreatment unit is the concentration of element mercury.Mercury analyzer of the invention is provided with gas
Body mercury pretreatment unit, sample gas first pass through gas mercury pretreatment unit, are element mercury by bivalent mercury high temperature reduction, after pretreatment
Gas be separated into two-way, be directly entered a detection pipe as sample gas all the way and detected to obtain sample gas spectrum, another way warp
It detects to obtain background spectra into another detection pipe after crossing mercury filtering eliminating machine by washing, by analysis background spectrum and sample spectra, can obtain
To the concentration of the total mercury in sample gas.It is handled by the mercury concentration handled by pretreatment unit and without pretreatment unit
By analysis, mercuric concentration can be obtained in the mercury concentration arrived.The outlet end of gas mercury pretreatment unit of the invention connects
There is mixing tube, when air-flow enters mixing tube by gas flow pipe, nozzle bore becomes larger, and air-flow is rapidly cooled in mixing tube, point
The cohesion for dissipating element mercury and oxygen, avoid it is mercuric re-form, while gas after cooling is re-used as sample gas and is more conducive to mercury
Filter absorption of the eliminating machine by washing to mercury.
Further, the gas flow pipe is helix tube or coiled pipe.
Gas flow pipe is designed as helix tube or coiled pipe, flow path of the gas in high-temperature heating equipment is elongated,
Residence time is also longer, and heating surface area is also bigger, to keep bivalent mercury reduction reaction more abundant, analyzes the mercury concentration measured more
Accurately.
Further, the high-temperature heating equipment is internally provided with temperature sensor, the temperature sensor and the temperature
Spend control device electrical connection.
Temperature inside temperature sensor the real time measure high-temperature heating equipment, then by the data feedback measured to temperature control
Device processed, thus the heating or stopping heating of temperature control equipment control high-temperature heating equipment.
According to another aspect of the present invention, a kind of mercury analysis method is additionally provided, above-mentioned mercury analyzer is used, including
Following steps:
Divide the sample gas of sampling to two-way, is directly entered one of detection pipe as sample gas all the way and is detected to obtain
Sample gas spectrum, another way enter another detection pipe after mercury filters eliminating machine by washing and are detected to obtain background spectra,
Sample gas spectrum and background spectra are analyzed to obtain the concentration of element mercury.
The mercury discharged in flue gas there are three kinds of element mercury, bivalent mercury and particle mercury forms, the detection pipe of mercury analyzer without
Method detects bivalent mercury, therefore the mercury concentration handled without gas mercury pretreatment unit is the concentration of element mercury
Further, the sample gas of sampling is first subjected to high temperature pretreatment through gas mercury pretreatment unit, made in sample gas
Bivalent mercury all divides two-way after reduction is converted into element mercury again, is directly entered one of detection pipe as sample gas all the way and carries out
Detection obtains sample gas spectrum, and another way enters another detection pipe after mercury filters eliminating machine by washing and detected to obtain background spectra, right
Sample gas spectrum and background spectra are analyzed to obtain the concentration of total mercury.
By the total mercury concentration handled by pretreatment unit and the element mercury handled without pretreatment unit
Concentration is analyzed, and mercuric concentration can be obtained.
Further, the mercury filtering eliminating machine by washing after a period of use, blows the mercury filter using carrier gas
It sweeps, while heating mercury filtering eliminating machine by washing parses the mercury of absorption, realizes the regeneration of the mercury filtering eliminating machine by washing.
Further, the heating temperature is 500~900 DEG C.
The invention has the following advantages:
Present invention solid metal ball made of wire winding is mixed, it is more much smaller than the diameter of snorkel, it is real
The accumulation of heart metal ball is filled in gas-guide tube formation filter layer Adsorption of Mercury, as metal ball be made of being mixed as wire it is solid
Ball has both the advantages of spun gold sand and spun gold are rolled into a ball, and metal ball surface is very coarse, this makes the specific surface area of metal ball very
It is big, and big specific surface area is conducive to the enrichment of mercury, increases the adsorbance of mercury.Meanwhile the filling of metal ball is so that metal
Existing gap keeps vapour lock lower between ball and metal ball, guarantees to also ensure air-flow while mercury can come into full contact with metal ball
It can pass through without by too big obstruction, therefore, the absorption especially suitable for the mercury in gas containing high concentration is enriched with.
Filtering eliminating machine by washing that mercury analyzer of the invention uses be mixed using the wire winding that can generate amalgam with mercury and
At filler of the solid metal ball as Adsorption of Mercury, the interference gas such as SO2, NO will not be adsorbed, strong antijamming capability, detection is single
Member includes at least two detection pipes, and one of detection pipe is used to test sample gas, obtains sample gas spectrum, another detection pipe is used to
The background gas of mercury has been washed away in detection filtering, is obtained background spectra, while synchro measure, is effectively removed interference, the mercury of analysis detection
Concentration accuracy is higher.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the mercury filtering eliminating machine by washing of the preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the mercury analyzer of the preferred embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the gas mercury pretreatment unit in Fig. 2.
Marginal data:
1, gas-guide tube；2, metal ball；3, block piece；4, positioning pipe；5, heater strip；10, mercury filters eliminating machine by washing；11, it detects
Pipe；12, detection pipe；13-15, solenoid valve；16, air pump；17, gas mercury pretreatment unit；18, high-temperature heating equipment；19, temperature
Control device；20, gas flow pipe；21, mixing tube.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited by following and
The multitude of different ways of covering is implemented.
Fig. 1 is the structural schematic diagram of the mercury filtering eliminating machine by washing of the preferred embodiment of the present invention.
As shown in Figure 1, the mercury of the present embodiment filters eliminating machine by washing, including gas-guide tube 1, metal ball 2, block piece 3 and positioning pipe
4, metal ball 2 is medicine ball made of being mixed as wire winding, and wire is that can form amalgam with mercury to the gold of Adsorption of Mercury
Belong to, the accumulation of metal ball 2 is filled in gas-guide tube 1 and block piece 3 is used to block at the build-up areas both ends of metal ball to prevent gold
Belong to 2 slump of ball, to form the filter layer of mercury, block piece 3 is made of the material of interfering substance in not adsorption gas flow, positioning pipe
4 are arranged in the two-port of gas-guide tube 1, for preventing filter layer loose and movement.
Solid metal of the present embodiment made of it can generate amalgam with mercury and be mixed to the wire winding of Adsorption of Mercury
Ball, more much smaller than the diameter of snorkel, the accumulation of solid metal ball is filled in gas-guide tube and is blocked using block piece in gold
Belong to the build-up areas both ends of ball to prevent metal ball slump to form filter layer Adsorption of Mercury, since metal ball is twined by wire
The medicine ball made of mixing, has both the advantages of spun gold sand and spun gold are rolled into a ball, and metal ball surface is very coarse and in wire
There are many gaps between wire, this makes the specific surface area of metal ball very big, and big specific surface area is conducive to
The enrichment of mercury.Meanwhile the accumulation filling of metal ball guarantees so that existing gap keeps vapour lock lower between metal ball and metal ball
Mercury also ensures that mercury vapour can be passed through without by too big obstruction while capable of coming into full contact with metal ball.Experiment test stream
The mercury vapour of fast 100 μ g/m3 of 1000mL/min concentration by the filtering wash away pipe it is 7*24 hours continuous after, bioaccumulation efficiency is still
100%.
The both ends of filter layer are provided with block piece, and the block piece uses the material system of interfering substance in not adsorption gas flow
At, the material mercury content can will not be interfered and influenced by block piece to test sample gas with Adsorption of Mercury or not Adsorption of Mercury
The accuracy of result is tested and analyzed, one side block piece plays the role of limit to the metal ball of filling, prevents accumulation from filling
Metal ball is collapsed and is fallen off, on the other hand, block piece can also primary filtration fall the large particulate matter in sample gas, guarantee entered
The gas of filter eliminating machine by washing does not have the interference of particulate matter and pollution.Positioning pipe is set on the outside of block piece again, fills metal ball and resistance
After block piece, positioning pipe can be inserted, metal ball and block piece are limited, prevents metal ball and block piece mobile.
In the present embodiment, metal ball 2 is gold wire ball, and gold wire ball made of spun gold is optimal to the adsorption effect of mercury.At other
In embodiment, metal ball 2 can be filamentary silver ball, platinum filament ball, nickel wire ball, titanium pompon etc., it is also possible to using various metals ball
It is applied in combination.
In the present embodiment, the diameter of spun gold is 0.1mm, and spun gold is intensively wound the small ball of sand shape, a diameter of
0.2~3mm, the size are more much smaller than the size of gas-guide tube, can be filled in gas-guide tube with dense accumulation.In other embodiments
In, metal ball 2 can also be spheroidal, elliposoidal, polygonal, irregular shape etc., metal ball using wire winding mix
It forms, shape can be unrestricted, is preferably as long as formation filter layer, the diameter of wire in gas-guide tube can be filled into
0.01~0.3 ㎜.
In the present embodiment, the outside of gas-guide tube 1 is also laid with heater strip 5.It further includes shell, gas-guide tube that mercury, which filters eliminating machine by washing,
1 is arranged in shell.It is laid with heater strip on the outside of gas-guide tube, after metal ball Adsorption of Mercury reaches saturation, needs to metal ball
Parsing regeneration is carried out, heater strip heats gas-guide tube, makes the mercury adsorbed by metal ball parsing, blows out air guide by carrier gas stream
Pipe.In other embodiments, parsing regeneration can also be carried out to metal ball using other heating methods.Gas-guide tube is arranged
It in shell, uses the gas-guide tube for having laid heater strip safer, convenient, facilitates and mercury filtering eliminating machine by washing is installed to it
Carried out in its equipment using.
In the present embodiment, gas-guide tube 1 is quartz ampoule, and positioning pipe 4 is also quartz ampoule.Adsorption of Mercury will not be by mercury for quartz ampoule
Corrosion is used as the gas-guide tube and positioning pipe of mercury filtering eliminating machine by washing, durable.Positioning pipe compresses silica wool and gold in addition to rising
Belong to ball, and outside the effect for preventing filter house from shifting, is set as tubulose, will not influence passing through for air-flow.Certainly, gas-guide tube and
Positioning pipe can also Adsorption of Mercury will not be made by the material that mercury corrodes using other.
In the present embodiment, block piece 3 is silica wool.Silica wool not Adsorption of Mercury, the also not interfering substance in adsorption gas flow,
It can stop gold wire ball stack layer slump.In other embodiments, block piece is also possible to spun gold cake or spun gold pine group, spun gold cake
Or spun gold pine group can Adsorption of Mercury, but not the interfering substance in adsorption gas flow, silica wool, spun gold cake, spun gold pine group will not
Jamming pattern spectrum.
The present invention also provides a kind of mercury analyzers.Fig. 2 is the structural representation of the mercury analyzer of the preferred embodiment of the present invention
Figure.
As shown in Fig. 2, the mercury analyzer of the present embodiment, including mercury shown in FIG. 1 filtering eliminating machine by washing 10 and detection unit, inspection
Surveying unit includes two detection pipes 11,12, and two detection pipes are connected on two branch lines in parallel of sample gas pipeline, mercury filtering
Eliminating machine by washing 10 is arranged on a wherein branch line for sample gas pipeline.
Solid metal of the present embodiment made of it can generate amalgam with mercury and be mixed to the wire winding of Adsorption of Mercury
Filler of the ball as Adsorption of Mercury will not adsorb the interference gas such as SO2, NO, and detection unit includes two detection pipes 11,12,
In detection pipe be used to test sample gas, obtain sample gas spectrum, another detection pipe is used to detect the background that mercury has been washed away in filtering
Gas obtains background spectra, and since there is no the interference of the gases such as SO2, NO, the background spectra that mercury analyzer of the invention measures is more quasi-
Really, thus it is also more acurrate by the concentration for analyzing obtained mercury.
Referring to fig. 2, in the present embodiment, the number that mercury filters eliminating machine by washing 10 is two, and two mercury filtering eliminating machine by washing 10 are in parallel
Setting.In the present embodiment, two mercury filtering eliminating machine by washing 10 share a shell in other embodiments can also two mercury mistakes
Shell is respectively set in filter eliminating machine by washing.Two mercury filtering eliminating machine by washing 10 are arranged in parallel, can one of mercury filtering eliminating machine by washing absorption
When being enriched with mercury, another carries out parsing regeneration, and mercury filtering eliminating machine by washing can be recycled, and mercury filtering eliminating machine by washing remains at
Optimal filtering adsorbed state is not in filter efficiency decline or the case where needing replacing consumptive material of failing.As shown in Fig. 2, sample
Multiple solenoid valves 13,14,15 are additionally provided on gas pipeline, for sample gas branch to circulate.Solenoid valve 13 is arranged in detection pipe
Front end (with airflow direction, similarly hereinafter), two import is separately connected sample gas branch feeder line and by mercury filtering eliminating machine by washing
Background gas branch feeder line, two outlets are separately connected detection pipe 11 and detection pipe 12.The setting of solenoid valve 14 filters eliminating machine by washing in mercury
Rear end, two import is separately connected the outlet of two mercury filtering eliminating machine by washing, and two outlets are separately connected the one of solenoid valve 13
A import and outlet line.The front end of mercury filtering eliminating machine by washing is arranged in solenoid valve 15, one import connection does not enter mercury mistake also
The branch feeder line of the background gas of eliminating machine by washing is filtered, another import connects air pump 16, and two outlets are separately connected two mercury filterings and wash
Except the import of device.Air pump 16 is used to provide the purging carrier gas of mercury parsing.
Referring to fig. 2, in the present embodiment, mercury analyzer further includes gas mercury pretreatment unit 17, gas mercury pretreatment unit
17 are arranged in the front end of sample gas pipeline, and there are three kinds of element mercury, bivalent mercury and particle mercury forms, mercury point for the mercury discharged in flue gas
The detection pipe of analyzer can not detect bivalent mercury, need that the bivalent mercury in flue gas is first reduced to element mercury, could be detected
Test tube tests and analyzes, therefore the mercury concentration handled without gas mercury pretreatment unit is the concentration of element mercury.The present embodiment
Mercury analyzer be provided with gas mercury pretreatment unit 17, sample gas first passes through gas mercury pretreatment unit 17, by bivalent mercury height
Temperature is reduced to element mercury, and pretreated gas is separated into two-way, is directly entered a detection pipe as sample gas all the way and carries out
Detection obtains sample gas spectrum, and another way enters another detection pipe after mercury filters eliminating machine by washing and detects to obtain background spectra, by dividing
Background spectra and sample spectra are analysed, the concentration of the total mercury in sample gas can be obtained.Meanwhile gas mercury pretreatment unit is gone back to mercuric
Original needs to carry out at a high temperature of 600 DEG C or more, therefore, if you do not need to analysis bivalent mercury, locates in advance as long as being not turned on gas mercury
The heating device for managing device, without changing piping connection.
Fig. 3 is the structural schematic diagram of the gas mercury pretreatment unit 17 in Fig. 2.As shown in figure 3, gas mercury pretreatment unit
17 include high-temperature heating equipment 18 and temperature control equipment 19；Gas flow pipe 20, gas are provided in high-temperature heating equipment 18
The first end of runner pipe 20 connects sample gas gas source, and the second end of gas flow pipe 20 is connected with mixing tube 21, mixing tube 21
Diameter is greater than the diameter of gas flow pipe 20, and mixing tube 21 connects sample gas pipeline, the connection high-temperature heating dress of temperature control equipment 19
18 are set, for controlling the heating temperature inside high-temperature heating equipment 18.In the present embodiment, also set up inside high-temperature heating equipment 18
There is temperature sensor, temperature sensor is electrically connected with temperature control equipment 19, and gas flow pipe 20 uses coiled pipe.Temperature sensing
Temperature inside device the real time measure high-temperature heating equipment, then by the data feedback measured to temperature control equipment, thus temperature
Control device controls the heating of high-temperature heating equipment or stops heating.Gas flow pipe 20 is coiled pipe, extends gas in height
Circulation path inside warm heating device 18 increases residence time and heating surface of the gas inside high-temperature heating equipment 18
Product, restores bivalent mercury sufficiently, in other embodiments, gas flow pipe 20 or helix tube.
In the present embodiment, the outlet end of gas mercury pretreatment unit is connected with mixing tube 21, and air-flow is by gas flow pipe 20
When into mixing tube 21, nozzle bore becomes larger, and air-flow is rapidly cooled in mixing tube 21, the cohesion of dispersed elements mercury and oxygen,
Avoid it is mercuric re-form, while gas after cooling is re-used as sample gas and is more conducive to absorption of the mercury filtering eliminating machine by washing to mercury.
The present embodiment additionally provides a kind of mercury analysis method, when needing to detect the concentration of element mercury in sample gas, using Fig. 2
Shown in mercury analyzer, include the following steps:
Divide the sample gas of sampling to two-way, detection pipe is directly entered by an import of solenoid valve 13 as sample gas all the way
11 are detected to obtain sample gas spectrum, and another way is entered into the mercury filtering removing mercury of eliminating machine by washing 10 by solenoid valve 14 through solenoid valve 15 to be examined
Test tube 12 is detected to obtain background spectra, is analyzed to obtain the concentration of element mercury to sample gas spectrum and background spectra.
It is using mercury analyzer shown in Fig. 2, the sample gas of sampling is first pre- through gas mercury when containing bivalent mercury in sample gas
Processing unit 17 carries out high temperature pretreatment, and the high-temperature heating equipment internal temperature of gas mercury pretreatment unit is set as 800 DEG C of left sides
The right side makes the bivalent mercury in sample gas all divide two-way again after reduction is converted into element mercury, all the way as sample gas by solenoid valve 13
An import be directly entered detection pipe 11 and detected to obtain sample gas spectrum, another way enters mercury through solenoid valve 15 and filters eliminating machine by washing
10 removing mercury are detected to obtain background spectra by solenoid valve 14 into detection pipe 12, are analyzed to obtain to sample gas spectrum and background spectra
The concentration of total mercury.
By analyzing the concentration of total mercury and the concentration of element mercury, mercuric concentration can be obtained.
Mercury filters eliminating machine by washing 10 after a period of use, inputs carrier gas using air pump 16 and blows mercury filtering eliminating machine by washing 10
It sweeps, while heating mercury filtering eliminating machine by washing 10 to make the mercury parsing of absorption, realizes the regeneration of mercury filtering eliminating machine by washing 10.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of mercury filters eliminating machine by washing, which is characterized in that
Including gas-guide tube (1), metal ball (2), block piece (3) and positioning pipe (4),
The metal ball (2) be as wire winding mix made of medicine ball, the wire be can with mercury formed amalgam from
And the metal of Adsorption of Mercury, metal ball (2) accumulation are filled in the gas-guide tube (1) and are blocked using the block piece (3)
At the build-up areas both ends of the metal ball (2) to prevent the metal ball (2) slump, so that the filter layer of mercury is formed, it is described
Block piece (3) is made of the material of interfering substance in not adsorption gas flow,
The positioning pipe (4) is arranged in the two-port of the gas-guide tube (1), for preventing the filter layer loose and movement.
2. a kind of mercury according to claim 1 filters eliminating machine by washing, which is characterized in that
The metal is one or more of gold, platinum, silver, nickel, titanium.
3. a kind of mercury according to claim 1 filters eliminating machine by washing, which is characterized in that
The metal ball (2) is one or more of spheroidal, elliposoidal, polygonal, irregular shape.
4. a kind of mercury according to any one of claims 1 to 3 filters eliminating machine by washing, which is characterized in that
The radial dimension of the metal ball (2) is 0.2~3 ㎜.
5. a kind of mercury analyzer, which is characterized in that
Eliminating machine by washing (10) and detection unit are filtered including the described in any item mercury of Claims 1-4,
The detection unit includes at least two detection pipes (11,12), and the detection pipe is connected to the parallel connection of sample gas pipeline
On branch line,
Mercury filtering eliminating machine by washing (10) is arranged on a wherein branch line for sample gas pipeline.
6. mercury analyzer according to claim 5, which is characterized in that
The number of mercury filtering eliminating machine by washing (10) is one；Or
The number of mercury filtering eliminating machine by washing (10) is two, and two mercury filterings eliminating machine by washing (10) are arranged in parallel.
7. mercury analyzer according to claim 5 or 6, which is characterized in that
The mercury analyzer further includes gas mercury pretreatment unit (17), and the gas mercury pretreatment unit (17) is arranged described
The front end of sample gas pipeline, the gas mercury pretreatment unit (17) include high-temperature heating equipment (18) and temperature control equipment
(19)；
It is provided with gas flow pipe (20) in the high-temperature heating equipment (18), the first end connection of the gas flow pipe (20)
The second end of sample gas gas source, the gas flow pipe (20) is connected with mixing tube (21), and the diameter of the mixing tube (21) is big
Diameter in the gas flow pipe (20), the mixing tube (21) connect the sample gas pipeline, the temperature control equipment
(19) high-temperature heating equipment (18) is connected, for controlling the internal heating temperature of the high-temperature heating equipment (18).
8. a kind of mercury analysis method, which is characterized in that
Using the described in any item mercury analyzers of claim 5~7, include the following steps:
Divide the sample gas of sampling to two-way, is directly entered one of detection pipe (11) as sample gas all the way and is detected to obtain
Sample gas spectrum, another way enter another detection pipe (12) after mercury filters eliminating machine by washing (10) and are detected to obtain background spectra,
Sample gas spectrum and background spectra are analyzed to obtain the concentration of element mercury.
9. mercury analysis method according to claim 8, which is characterized in that
The sample gas of sampling is first subjected to high temperature pretreatment through gas mercury pretreatment unit (17), keeps the bivalent mercury in sample gas whole
Reduction divides two-way after being converted into element mercury again, is directly entered one of detection pipe (11) as sample gas all the way and detect
It is composed to sample gas, another way enters another detection pipe (12) after mercury filters eliminating machine by washing (10) and is detected to obtain background spectra,
Sample gas spectrum and background spectra are analyzed to obtain the concentration of total mercury.
10. mercury analysis method according to claim 8 or claim 9, which is characterized in that
Mercury filtering eliminating machine by washing (10) after a period of use, using carrier gas blows mercury filtering eliminating machine by washing (10)
It sweeps, while heating mercury filtering eliminating machine by washing (10) to make the mercury parsing of absorption, realizes the regeneration of mercury filtering eliminating machine by washing (10).
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| CN201811537356.3A CN109596546A (en) | 2018-12-15 | 2018-12-15 | Mercury filters eliminating machine by washing, mercury analyzer and analysis method |
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| CN201811537356.3A CN109596546A (en) | 2018-12-15 | 2018-12-15 | Mercury filters eliminating machine by washing, mercury analyzer and analysis method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110694582A (en) * | 2019-10-22 | 2020-01-17 | 中南大学 | Mercury enrichment material for mercury detector, preparation method and application |
| CN111487370A (en) * | 2020-04-16 | 2020-08-04 | 南京理工大学 | Device and method for converting oxidized mercury and measuring total mercury content of flue gas |
| CN111569599A (en) * | 2019-11-08 | 2020-08-25 | 杭州超钜科技有限公司 | Composite fiber type mercury capturing device and preparation method of mercury capturing composite fiber |
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| CN110694582A (en) * | 2019-10-22 | 2020-01-17 | 中南大学 | Mercury enrichment material for mercury detector, preparation method and application |
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| CN111569599A (en) * | 2019-11-08 | 2020-08-25 | 杭州超钜科技有限公司 | Composite fiber type mercury capturing device and preparation method of mercury capturing composite fiber |
| CN111569599B (en) * | 2019-11-08 | 2021-12-10 | 杭州超钜科技有限公司 | Composite fiber type mercury capturing device and preparation method of mercury capturing composite fiber |
| CN111487370A (en) * | 2020-04-16 | 2020-08-04 | 南京理工大学 | Device and method for converting oxidized mercury and measuring total mercury content of flue gas |
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Application publication date: 20190409 |